Absorbent articles containing a multifunctional gel.
Abstract
Están descritas las composiciones adhesivas para la piel mejoradas para retener un sustrato, tal como un artículo absorbente en la piel. Más particularmente, las composiciones adhesivas para la piel tienen una adhesión mejorada pero suave a la piel de una usuaria, mientras que se mantiene una unión efectiva y fuerte a varios sustratos que no son piel e inanimados. En una incorporación, la composición adhesiva para la piel puede proporcionar uno o más agentes para el beneficio de la piel para la usuaria. La composición adhesiva para la piel puede ser aplicada a un artículo absorbente tal como un forro para bragas, una toalla sanitaria o un artículo para la incontinencia, para adherir directamente el artículo a la piel de la usuaria.

Term
3.3 yearsleft in the term
Expires 29 January 2030.
- Priority
- Filed
- Granted
- Today
- Expires
8 claims: 8 independent, 0 dependent
- 1REIVINDICACIONES Un artículo absorbente que comprende impermeable al fluido que tiene una superficie de cara al 5 cuerpo y una superficie de cara a la prenda, la superficie de cara al cuerpo teniendo una composición de gel absorbente y adhesiva a la piel sobre la misma para adherir el sustrato directamente a una usuaria y para absorber los fluidos del cuerpo, en donde la composición de gel comprende un hidrogel y 10 en donde el hidrogel está entrelazado con un tejido fibroso y la proporción del hidrogel al tejido fibroso es de desde 30:1 a 100:1.
- 2El artículo absorbente tal y como se reivindica 15 en la cláusula 1, caracterizado porque la composición de gel absorbente y adhesiva a la piel es capaz de absorber por lo menos 20% de su peso en agua.
- 3El artículo absorbente tal y como se reivindica 20 en la cláusula 1, caracterizado porque el hidrogel está compuesto de monómeros seleccionados del grupo que consiste de acrilatos, vinilos, amidas, ésteres y mezclas de los mismos.
- 4El artículo absorbente tal y como se reivindica 25 en la cláusula 1, caracterizado porque el hidrogel está formado de una composición precursora que comprende un monómero, un iniciador, un agente de entrecruzado y un solvente. 107
- 5El artículo absorbente tal y como se reivindica en la cláusula 1, caracterizado porque el hidrogel tie|j^H$fj^j estructura entrecruzada tridimensional.
- 6El artículo absorbente tal y como se reivindica en la cláusula 1, caracterizado porque la composición de gel absorbente y adhesiva a la piel está compuesta de una estructura de capas múltiples con una primera capa para adherir 10 el sustrato a la usuaria y una segunda capa interpuesta entre la primera capa y el sustrato para retener el fluido, la primera capa comprendiendo un material hidrofóbico y la segunda capa comprendiendo un material hidrofílico. 15
- 7El artículo absorbente tal y como se reivindica en la cláusula 1, caracterizado porque la composición de gel absorbente y adhesiva a la piel define una parte central y una parte periférica en donde la parte periférica es más adhesiva a la piel de la usuaria que la parte central.
- 8El artículo absorbente tal y como se reivindica en la cláusula 10, caracterizado porque la parte central es más absorbente que la parte periférica. 25 9. Un artículo absorbente tal y como se reivindica en la cláusula 5, caracterizado porque el hidrogel está compuesto de monómeros seleccionados del grupo gue consiste de 108 N-vinil pirrolidona, hidroxietil metacrilato í l Ü p/ ácido metacríl-ico o su sal, ácido sulfónico estireno o su sal, .jato sulfopropil de potasio, dimetil acrilamida, dimetil amino metacrilato o su derivado de sal cuaternaria, ácido acrilamido 5 metil propano sulfónico o su sal y mezclas de los mismos. 109
Independent claims8
679 paragraphs in 21 sections, as filed
(54) Title: ABSORBENT ARTICLES CONTAINING A MULTIFUNCTIONAL GEL.
(54) Title: ABSORBENT ARTICLES CONTAINING A MULTIFUNCTIONAL GEL.
(57) Summary
Enhanced skin adhesive compositions for retaining a substrate, such as a skin absorbent article, are disclosed. More particularly, skin adhesive compositions have an improved but smooth adhesion to a user's skin, while maintaining an effective and strong bond to various inanimate and non-skin substrates. In one embodiment, the skin adhesive composition can provide one or more skin benefit agents for the wearer. The skin adhesive composition can be applied to an absorbent article such as a panty liner, a sanitary pad or an incontinence article, to directly adhere the article to the wearer's skin.
(57) Abstract
Improved skin-adhesive compositions for bonding a substrate, such as an absorbent article, to skin are disclosed. More particularly, the skin-adhesive composition has an improved, yet gentle, adherence to the skin of a user, while maintaining strong, effective bonding to various inanimate, non-skin substrates. In one embodiment, the skin-adhesive composition can provide one or more skin benefit agents to the user. The skin-adhesive composition may be applied to an absorbent article, such as a panty-liner, sanitary napkin, or an incontinence article, for directly adhering the article to the skin of a user.
I KNOW
SYCMTAWA My ICOSOMY
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Mexican Institute of Industrial Property
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PATENT TITLE NO, 336256
Headline (s): KIMBERLY-CLARK WORLDWIDE, INCORPORATED
Home:
2300 Winchester Road, Neenah, Wisconsin, 54956, USA
Denomination: ABSORBENT ITEMS CONTAINING A MULTIFUNCTIONAL GEL.
Classification: IC.8: A61F13 / 511; A61F13 / 53; A61F13 / 58; A61L15 / 60
Inventories
ALI YAHIAOUI; CANDACE DYAN KRAUTKRAMER; MARGARET G. LATIMER; CKN
LAN
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RRY
LICITUDE
Internship filing date of January 2010
Number:
Date:
12 / 364,365 with inmente
PRIORITY FEBRUARY 2 Gum: Twenty | years • Make VencÉhientc $ ft & rte of reference is granted in accordance with article 23 of article .e of the ntada to parbr of the presentation feote of the
I
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8.
subscribes I read presentí Industrial age (Diarit 1/2004, 06/18/2005, 2t
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V, 6 * fraction III. and 59 of the Id Istrial Property. patent has a viSends alre ^ fetftos impror gables, keep vig ites the and 7 ° bis 2 of the I and the 10/1996, 12/26/1997, 17 5/1999, and 04/09/2012); items 1<sup>or</sup>, 3 · V title I have it with ricial foundation of the Federation (OOF) 27 / t
J1 / 2006, C '05 / 2009,06 / 01/2010, 06/18/2010;
| s I and III c I Regulations of the Mexican Institute of Industrial Property (DOF 14/12/1999, reworked on D7 / 2004 and _ JIÍUWK, <sup>1</sup>1WW IIUH B.UI and TI UI »WI, I · Ι II IU. I, I <........................,, - organic of the Mexican Institute of Industrial Property (DOF 12/27/1999, amended on 10/10/2002, 07/29/2004, 08/04/2004 and 09/13/2007); 1, 3 and 5 subsection a) of the Agreement that delegates powers to the Deputy Directors General, Coordinator, Divisional Directors, Holders of the Regional Offices, Divisional Deputy Directors, Departmental Coordinators and other subordinates of the Mexican Institute of Industrial Property. (DOF 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007).
Issue Date: January 13, 2016
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Arenal No. 550. Floor 1, Coi. Pueblo Santa María Tepepan,
Xochimtlco Delegation,
CP 16020, Mexico City
Tel (55) 53 34 07 00 www impi gob. mx
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The present disclosure generally relates to absorbent articles for absorbing and retaining body fluids and, more particularly, to absorbent articles containing gels that exhibit adhesive and / or absorbent properties. Furthermore, it has been found that gels having both adhesive and absorbent qualities can be incorporated into absorbent articles. In one embodiment, the present disclosure relates to an absorbent article, such as a panty liner, a sanitary napkin or an incontinence article, with the skin adhesive and absorbent gel composition applied thereto to adhere directly the article to the skin of a user / wearer and to absorb body fluids.
Absorbent personal care items intended to absorb discharged body fluids are well known in the art. Such absorbent articles generally comprise a fibrous mass or other absorbent core which can absorb and retain body fluids. Similarly, it is well known that women's care articles have been used to absorb and retain fluids, such as urine and / or menstrual fluids. Conventionally, absorbent articles v
to go
X.
They include top between the bottom sheet fluid-impervious, fluid-permeable and absorbent core bottom sheet and top sheet. The
ÜJL '· a ho'jffihíUk<sup>:</sup> Previous Wustrte absorbent articles have also included various other features to improve fluid handling, such as intake layers, distribution layers, retention layers, and the like. In these absorbent personal care articles, the top sheet is the body facing side of the absorbent article and the bottom sheet is the garment facing side of the absorbent article.
Generally, absorbent articles are held in place during use by employing elastic and waist material of the wearer at the waist portion of the absorbent product in place during use, and in the case of underpants. such as diapers and training pants, or by attaching the absorbent article to a wearer's underwear or undergarment in the case of pads or panty liners. Current methods of attaching the absorbent article to a wearer's underwear or undergarment include using an adhesive placed on the garment facing side of the bottom sheet and, optionally or alternatively, using the flaps (wings) that they extend from the longitudinal sides of the absorbent article which are wrapped around the crotch portion of the wearer's undergarment or underwear.
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Msxican ©
It has been suggested that an adhesive be used for ^ @ ^ | l ^ $ j ^<sub>s</sub>^ the wearer's skin absorbent article as disclosed in US Patent Application Serial No. 12 / 267,806, the contents of which are incorporated herein for all relevant and consistent purposes. .
There is a need for absorbent articles that include materials that are multi-functional, and specifically materials that provide both absorption and adhesion to the wearer. Such absorbent articles will be characterized by decreased complexity. In addition, an absorbent material that also functions as an adhesive will move as the body moves allowing superior filtering protection during periods of increased user activity or movement. Such material will also reduce the separation between the material and the user's body, thereby increasing fluid interception and reducing the potential for fluid filtration.
BRIEF DESCRIPTION OF THE INVENTION
It has been found that absorbent gel and skin adhesive compositions can be produced and can also be included in absorbent articles for improved bonding of substrates and articles directly to a user's skin. In particular, the use of f. ,. . -> absorbent gel and skin adhesive compositions; '-f, · / fluid and reducing the potential for fluid filtration. Generally, the absorbent gel and skin adhesive compositions of the present disclosure include hydrogels and / or aerogels that are absorbent and skin adhesive. Absorbent gel and skin adhesive compositions have been found to allow the adhesive to maintain its bond strength with the substrate and have improved skin bond strength, but remain smooth on the skin surface. In one embodiment, the absorbent gel and skin adhesive composition further includes at least one skin benefit agent for providing improved health to the wearer's skin.
The absorbent gel composition and skin adhesive can be applied to various substrates. Particularly, in one embodiment, the absorbent gel and skin adhesive composition is applied to the body facing side of a fluid impervious substrate of an absorbent article. Examples of absorbent articles include, for example, a panty liner, a sanitary pad, or an incontinent article.
In one aspect of the present disclosure, an absorbent article comprises a fluid impervious substrate
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which has a body-facing surface and a face of the garment. The body-facing surface composition of absorbent gel and skin adhesive is the same to adhere the substrate directly from a user and to absorb body fluids.
In another aspect of the present disclosure, the absorbent article comprises a fluid impervious substrate, an absorbent core, and a perforated liner. The fluid impervious substrate has a body facing surface and a garment facing surface. The absorbent core is interposed between the substrate and the perforated liner and comprises an absorbent gel composition.
Other objects and characteristics will be partly evident and of course will be partly pointed out from now on.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a top view of an incorporation of an absorbent article of the present description.
Figure 2 shows a bottom view of the absorbent article shown in Figure 1.
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Figure
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shows a
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second incorporation of an article description.
absorbent
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Figure 4 shows a cross section of a third embodiment of the absorbent article of the present disclosure; and
Figure 5 shows a cross section of a fourth embodiment of an absorbent article of the present disclosure.
Corresponding reference characters indicate corresponding parts throughout the drawings.
DEFINITIONS
It should be noted that, when used in the present description, the terms comprise, understanding, and other derivatives of the root term comprehend are intended to be open-ended terms that specify the presence of any stated characteristics, elements, integers, steps, or components , and no attempt is made to exclude the presence or addition of one or more of other charact eristics, elements, integers, steps, components, or groups thereof.
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When elements of the description or of the incorporation or of the preferred elements thereof are introduced, the articles a,
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of this ?, inco rpd®íüÍ ^^ jX una, el ^
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said is intended to mean that there is one or more of the elements. The terms understanding, including and having, are intended to be inclusive and mean that there may be additional elements other than the listed elements.
It should be understood that the term absorbent product or absorbent article, as used herein, refers to any article used to control body fluids that are configured to absorb and retain exudates from the body including urine, blood, menstrual fluids, and other discharges from the body, such as sweat and vaginal secretions resulting from sexual activity and the like. In addition, the term is intended to include odor absorbent articles. Absorbent articles include diapers, caps, incontine nce supplies, and the like.
As used herein, the term polymer generally includes, but is not limited to homopolymers, copolymers, such as, for example, block, graft, random and alternating copolymers, terpolymers, etc., and blends. and modifications thereof. Also, unless specifically limited otherwise, the term
1st P W-<sup>:</sup> ·. Sasswciti »«. * · -:
polymer will include all geometric configurations.-. . Month ..<sub>to</sub>. possible of the material. These settings include (tié4 ^ Q ^^ Q. ¿2
Srtdustítat are limited to isotactic, syndiotactic and random symmetries.
As used herein, adhesion modifier refers to an agent that enables the adhesive of the gel composition to maintain its bond strength to the substrate and improve its bond strength to the skin, but which remains soft and gentle on the surface of the skin. Furthermore, the adhesion modifier behaves as a carrier or delivery vehicle to aid in the delivery of one or more skin benefit agents to said wearer's skin. Typically, the adhesion modifier has a matrix or polymer type network structure that can have numerous micropores or channels, which can contain the skin benefit agent as described below. Suitable adhesive modifiers can include, for example, POLY-PORES, POLYTRAPS, and the like. Particularly suitable examples, described more fully below, include POLYTRAP 7603, which is an allyl methacrylate / glycol dimethylacrylate cross polymer; POLY-TRAP 6603, which is a lauryl methacrylate / glycol dimethacrylate cross polymer; POLY-PORE E200 and POLY-PORE L200, both of which are crossyl polymers of allylmethacrylate.
As used herein, the phrase "body-facing surface" means that surface of the absorbent article or
X any structure that is part of the absorbent article (for><sub>1|( </sub>For example, the lining, the absorbent core, the composition qgg ^ fp ^^^^, which is intended to be placed towards the body or that of the user or placed on one side of the body or skin of the user during ordinary use. The garment facing surface is on the opposite side of the absorbent article from the body facing surface. The garment facing surface is an outer surface of the fluid impervious substrate and is intended to be positioned to face outward from the wearer's body during ordinary use.
The surface facing the garment is generally fixed
<td rowspan="2">to be carried interiors.</td><td colspan="4">facing towards or placed to the side of the garments</td>
<td>of the</td><td>user when the article</td><td colspan="2">absorbent is</td>
<td> 15</td><td></td><td></td><td></td><td></td>
<td></td><td>How</td><td colspan="2">used here, the term connect</td><td> it tries</td>
<td colspan="2">that means</td><td>connected directly</td><td>and</td><td>connected</td>
indirectly. By directly connected, it is intended that the connected elements are in contact with each other or are fixed or adhered to each other. By indirectly connected, it is intended that one or more of the intermediate or intervening elements are between the two elements which are secured or connected together. The intervening elements can be fixed or attached.
As used herein, the term clamped is intended to mean directly clamped and indirectly clamped.
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»·. : i, <··
v. <sub>;</sub>
By directly attached, it is intended that the attached elements are in contact with each other or are9. attached to each other. By indirectly attached, it iil ^ ktá<sup>5</sup>'' · To say that one or more of the intervening or intermediate elements are between the two elements which are secured or held together.
The elements involved can be fixed or attached.
As used herein, the term fluid impervious substrate is intended to mean any known substrate in absorbent articles, in health care products, and / or in the art of personal care product that is generally capable of maintaining a dry garment face surface by exposing the face surface to the body to water or other body fluids. Health care products include products such as masks, surgical gowns, gloves, and the like.
As used herein, the term hydrogel or hydrogel composition refers to a polymeric material that is capable of absorbing more than about 20 percent by weight in water while maintaining a structure of three distinct dimensions. Additionally, the term hydrogel monomer can refer to the polymerizing formulation or the hydrogel precursor composition (including the hydrogel monomer) which is converted to a hydrogel when the polymerization is activated through conventional processes.
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, -Iel ultraviole setting ^} ',' cteta, heat, initiation ^^^ such as ultraviolet radiation (or gamma rays, chemical electron beam, etc., as discussed hereafter here.
As used here, the term airgel refers to a low-density material in which the liquid has been replaced by a gas. Aerogels include all forms of airgel including, for example, inorganic aerogels, organic aerogels (particularly carbon 10 aerogels), and xerogels (the gels formed when hydrogels are air dried as opposed to super critically dried).
As used herein, the term "fibrous fabric" includes any fabric that has a structure of individual threads (eg, fibers or filaments), including woven fabrics, non-woven fabrics, canvases, woven fabrics, etc.
As used herein, the term non-woven fabric refers to a fabric that has a structure of individual threads (eg, fibers or filaments) that are randomly interlocked, and not in an identifiable manner as in a woven fabric. Non-woven fabrics include, for example, fusion blown fabrics, yarn-bonded fabrics, carded fabrics, wet-laid fabrics, air-placed fabrics, coform fabrics, tangled fabrics
Tra ··
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hydraulically etc. The basis weight of the nonwoven fabric may * 'generally vary, but this weight is typically around 5 grams per square meter to 200 grams per square meter, and in some additions from about 10 grams per square meter to about 150 grams per square meter, and in some additions from about 15 grams per square meter to about 100 grams per square meter.
As used herein, the term fusion blown tissue generally refers to a nonwoven fabric that is formed by a process in which a molten thermoplastic material is extruded through a plurality of fine, usually circular, matrix capillary vessels, such as fibers melted inside gas streams (for example air), at high speed and converging that attenuate the melted thermoplastic material fibers to reduce their diameter, which can be at a microfiber diameter. The meltblown fibers are then carried by the gas stream at high speed and deposited on a collecting surface to form a randomly dispersed, meltblown fiber fabric. Such a process is described, for example, in US Patent No. 3,849,241, which is incorporated herein for all relevant and consistent purposes. Generally speaking, the meltblown fibers can be microfibers that are essentially continuous or discontinuous, fibers that are generally smaller than 10 microns in diameter, and that are generally on the collecting surface.
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when
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As used herein, the term spunbond fabric generally refers to a fabric having essentially continuous filaments of small diameter. The filaments are formed by extruding a molten thermoplastic material from a plurality of usually circular fine capillaries, from a spinning member with the diameter of the extruded filaments then being rapidly reduced such as by, for example, eductive pulling and / or other well-known spinning attachment mechanisms. The production of
<td colspan="4">the tissues joined with</td><td colspan="2">yarn</td><td colspan="2">is described and</td><td colspan="2">illustrated</td><td>by</td>
<td>example in</td><td>the</td><td colspan="4">Patent of the</td><td>state</td><td>United (</td><td>of</td><td>America</td><td>No.</td>
<td> 4,340,563,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,692,618,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,802,817,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,338,992,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,341,394,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,502,763,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,502,538,</td><td>in</td><td>the</td><td>Patent</td><td>of</td><td>the</td><td>state</td><td>United</td><td>of</td><td>America</td><td>No.</td>
<td> 3,542,615,</td><td colspan="4">and in the Patent of</td><td colspan="3">; the United States</td><td>of</td><td>America</td><td>No.</td>
<td> 5,382,400,</td><td colspan="2">all</td><td colspan="5">which are incorporated here</td><td colspan="2">for all</td><td>the</td>
consistent and relevant purposes. The filaments can, for example, be much longer in length than their diameter, such as a length to diameter ratio (aspect ratio) of greater than about 15,000: 1, and in some cases,
<img file="MX336256B_D0028.tif" />
greater than about 50,000: 1. The filaments sometimes having diameters less than about 40 are frequently between about 5
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they can at ^ pnáé ^ X my cr MjSCf microns to around 20 microns.
As used herein, carded fabrics refers to non-woven fabrics formed by carding processes as known to those of skill in the art and are further described, for example, in US Patent No. 4,488,928, which is Incorporated here for all relevant and consistent purposes. Briefly, carding processes involve starting with short fibers in a bulky block that is bowed or otherwise treated to provide you with a generally uniform basis weight. A carded fabric can then be joined by conventional means as is known in the art such as, for example, air bonding, ultrasonic bonding and thermal knit bonding.
As used herein an air laid fabric is a fibrous woven structure formed primarily by a process involving the deposition of air-borne and loose fibers on a porous or perforated forming surface. Generally, the fabric includes cellulosic fibers such as those of the fluff pulp that have been separated from a sphere of fibers, such as by a hammer milling process, and are then carried in a moving stream of air and supplied surface dry.
or they are collected on the forming screen u nobra <L and<sup>1</sup>··,., 'Bad a perforated forming fiber placed fabric, usually with the ay
There may also be others
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fibers such as short thermoplastic fibers or binder fibers present, and typically after harvesting of the fibers onto the forming surface the fabric is densified and / or bonded by such methods as thermal bonding or adhesive bonding. In addition, super absorbent materials in fiber or particle form can be included in air-placed fabrics when desired. Equipment for producing air-laid fabrics includes the Rando-Weber air-forming machine available from Rando Corporation of New York and the Dan-Web rotary-grid air-forming machine available from Dan-Web Forming of Risskow, Denmark.
DETAILED DESCRIPTION OF DISCLOSURE
Referring now to Figure 1, an absorbent article generally constructed in accordance with the principles of the present disclosure is designated with the number 100. As illustrated in Figures 1-2, the absorbent article 100 has a longitudinal direction 1 and a direction Side 2. A component of absorbent article 100 is a substrate 114. This substrate 114 has a first side 115, as shown in Figure 1, and a second side 117, as shown in Figure 2. Substrate 114 serves to provide the overall contour or
<img file="MX336256B_D0031.tif" />
The first side 115 of the substrate 114 is the body facing side of the substrate and the second side 117 of the substrate is the garment facing side. The first side 115 of the substrate 114 is generally designed or adapted to make contact with the skin of the user.
Absorbent article 100 has an absorbent gel and skin adhesive composition 121 attached to the first side 115 of substrate 114. The gel composition has a first side 130 which is the body-facing side of the composition and a second side 132 which is the garment facing side of the gel.
Generally, the substrate 114 is dimensioned and. shaped so that the first side 115 of the substrate only makes contact with or adheres to the skin surrounding and close to the vulva area and possibly to the user's pubic and perineal regions. The absorbent gel and skin adhesive composition 121 is dimensioned and shaped such that generally the first side 130 of the gel composition contacts the wearer's vulva region. The first side 130 of gel composition 121 is what holds the absorbent article in place on a wearer's body.
OJLMpíj
The absorbent article 100 of the disclosure is designed to adhere to the body of a usdh-félSSÍffaf in the area of the wearer's body which may require that body fluids be absorbed. In a particular use of the absorbent article, the absorbent article is attached to the body of a female wearer in the vulva region of the body or around the vulva region of the body. By or around the vulva region is meant the adjacent regions of a woman's body including the vulva, the pubic region, and the perineum region. When applied to the vulva region or around the vulva region of the woman's body, the absorbent article can be used as a panty liner, sanitary napkin or incontinence article. In addition, the absorbent article can be used as a substitute for underwear since the absorbent article of the present disclosure does not require underwear to hold the absorbent article in place. As a substitute for underwear, the absorbent article provides protection to the vulv area a area by creating a barrier between the outer garment and a wearer's vulva. When worn as a substitute for underwear, the absorbent article serves to protect the wearer's outer garment from body discharge from the vulva region of the wearer's body. Furthermore, when the absorbent article is used as a substitute for underwear, the absorbent article also serves to protect body and skin characteristics.
<img file="MX336256B_D0032.tif" />
vulva region. Even though described herein as a personal item for women such as a panty liner or sanitary pad, it should be known to a person skilled in the art that the absorbent article can be any absorbent article in the art of personal care and further the user does not need to be a woman.
THE SUBSTRATE
The substrate 114 of the absorbent article 100 can be prepared from a variety of materials. The substrate may include a layer constructed of any material which will function to be operationally impervious to the fluid. Substrate 114 may, for example, include a polymeric film, a woven fabric, a non-woven fabric, or the like, as well as combinations or compounds thereof. For example, substrate 114 can include a polymer film laminated to a woven or non-woven fabric. A laminated substrate structure 114 is shown in Figure 5, having an upper layer 141 and a lower layer 142, wherein the upper layer 141 is the body-facing side of the substrate 114 and the lower layer 142 is the facing side to the substrate garment. In a particular embodiment, the polymer film can be composed of a polyethylene, a polypropylene, a
<img file="MX336256B_D0033.tif" />
polyester, silicone or similar as well as combinations of them. Additionally, the polystyrene film © cfQp ^^ | ¿printed message for the consumer, and / or may be at least partially colored.
Suitably, the substrate 114 can operatively allow sufficient passage of air and moisture vapor out of the absorbent article 100, particularly out of the absorbent gel and skin adhesive composition 121 while blocking the passage of fluids of the body and odors frequently associated with body fluids. An example of a suitable substrate material may include a breathable microporous film such as those described in, for example, United States Patent No. 6,045,900, which is incorporated herein by reference for all relevant and consistent purposes. Other substrate materials which are extensible can be used in the present description, including the example foams. An example of a suitable foam is a polyurethane foam with a negative Poissons ratio. Examples of extensible bottom sheet materials are described in United States Patent No. 5,611,790 which is incorporated herein by reference for all relevant and consistent purposes. Other materials that are inherently able to breathe, such as polyurethanes
114.
can also be used to form the substrate ^ - 'data Fronte Industrie
In a particular embodiment of the present disclosure, the substrate 114 may be a laminate of a woven or non-woven fabric with a silicone polymer. The second side 117 of the substrate will be a woven or non-woven fabric and the first side 115 of the substrate will be a silicone polymer. A commercially available laminate is an OLEEVA fabric available from Bio Med Sciences, Inc., (Allentown, PA, United States of
America). OLEEVA fabric is a silicone sheet that has adhesive properties laminated to a fabric backing. The silicone sheet will form the first body facing side 115 of the substrate material. In relation to this particular structure for the figures, in Figure 5, the silicone polymer is the top layer 141 of the substrate 114 and the nonwoven layer or the held layer is the bottom layer 142 of the substrate. In one embodiment, the polymer film is composed of the like, polyethylene, polypropylene, polyester, silicone, and combinations thereof.
Additionally, the polymer film may be micro-etched, it may have a printed design, it may have a printed message to the consumer, and / or it may be at least partially colored.
Two-component films or other multi-component films can also be used as the material. .<sup>,=</sup>T¡fli7m · í - »....
of substrate 114. In addition, woven fabrics and / or inp 'fabrics.
Woven M'VW Uüki'c which have been treated or made to be haiférlás · '· * α © Ια operationally permeable to liquid may also be as an effective substrate material 114. Another suitable substrate material may include foams. Examples of the foam include closed cell polyolefin foam, a foam with a negative Poissons ratio, and other similar foams. Other suitable polymeric materials include a polyurethane polymer material, a silicone polymer, or other similar materials.
In another embodiment of the present disclosure, substrate 114 may be prepared from an interpenetrating polymer network or from two or more polymers. Generally, one of the polymers in the interpenetrating polymer network can be a silicone gel. Examples of the interpenetrating polymer network are described in United States Patent No. 5,759,560, which is incorporated herein by reference for all relevant and consistent purposes.
The substrate material should be selected so that the general properties of the substrate allow said substrate material to move with the user's skin during normal use and the normal movements of the user during use. By normal movement of the wearer is meant any movement that normally occurs during use of the absorbent article, including walking, running,
<img file="MX336256B_D0034.tif" />
kneeling, walking
<img file="MX336256B_D0035.tif" />
sitting, standing, cycling, exercising, getting out of a car, and others doing sports, similar movements made by the user when carrying an absorbent item. The substrate 114 should not be too stiff so that the substrate would come off the wearer's skin during use and the substrate should not be very flexible so that the substrate would tend to twist and bulge during use. The substrate 114 must have sufficient flexibility to conform to the wearer's skin and be made similar to a second wearer's skin. Substrate 114 must also have the ability to remain attached to the wearer's body under wet or wet conditions.
Generally, the substrate material should be thick enough to allow the substrate 114 to mold to the wearer's body, but should not be too thick so that the substrate 114 becomes uncomfortable for the user to use. In addition, the substrate 114 should not be so thin that it forms an ineffective seal with the wearer's skin when applied to the wearer, or that it peels off the wearer's skin during normal use and movement of the wearer. the user during use or that it does not conform adequately to the shape and skin of the user at the point of attachment to the user. Depending on the material used for the substrate, the typical thickness of substrate 114 is between 0.03 millimeters and around 5.0 millimeters, and more particularly between 0.1
<img file="MX336256B_D0036.tif" />
millimeters and 3.0 millimeters. In a particular embodiment, '' the thickness of the substrate is between 0.25 millimeters feidusírW 3.0 millimeters. Again, the actual thickness used will depend on various factors including the stiffness of the material, the flexibility of the material, and the ability of the material to assume the shape of the wearer's skin at the site of use.
The second side 117 of the substrate 114 may form a part of the garment-facing side of the absorbent article 100 when used by a user. The substrate material should be selected so that the second side 117 of the substrate 114 will be freely moved against the wearer's garment or wearer's clothing. One way to achieve this result is to construct the second side 117 of the substrate 114 to have a fairly low coefficient of friction. This will allow the second side 117 of the substrate 114 to move freely against the undergarment or other clothing worn by the user. If the second side 117 of the substrate 114 does not move freely against the wearer's garment or other garment worn by the wearer, the absorbent article will be caught on the undergarment or clothing, which can result in the absorbent article it is removed prematurely and undesirably from the wearer or the absorbent article can be caused to be moved from its desired placement against a wearer's skin.
In order to achieve the desired coefficient of friction on the second side 117 of the substrate 114, the materials used to prepare the substrate can be selected on the side of the desired material.
so that the second will inherently have the coefficient of friction
Alternatively, the second side
117 The substrate 114 may be treated with a coating composition, such as a polytetrafluoroethylene-containing coating, a silicone-containing coating, or other similar coating having a low coefficient of friction properties.
Alternatively, the substrate 114 may be made of a laminate of two or more materials such that the first side 115 of the substrate 114 is prepared from a material which satisfies the necessary properties of the first side, while the material selected for the second side 117 of the substrate satisfies the desired coefficient of friction so that the second side will move freely against the undergarment or clothing being worn by a user.
The substrate 114 of the absorbent article 100 can be flat or can have a three-dimensional shape, as shown in Figure 4, which is a cross-sectional side view of an absorbent article of an embodiment of the present disclosure, the substrate 114 has a three-dimensional concave shape. Alternatively, as shown in the cross-sectional side views of Figure 5, the substrate 114 may have a generally flat shape. By providing the absorbent article 100 with a three-dimensional concave shape, as shown in Figure 4, the placement
<img file="MX336256B_D0037.tif" />
The article may be easier for the user. Generally ^
r. > '¡J, ·?.? ..;.> \ • - /' í.dL vj>
the three-dimensional shape may be such that it is ^^^^ vj.gsig ^ and optionally from the pubic and perineal regions of most women, when the absorbent article is used as a panty liner, a sanitary pad, or a article for women's incontinence. To form the substrate 114 into a three-dimensional shape, the substrate can be molded in any manner known to those skilled in the art, for example heat molding. The manner in which the three-dimensional shape is imparted to the substrate 114 is not critical to the present disclosure.
When the substrate 114 is of a generally flat shape, for example, as shown in FIG. 5, meaning that the substrate does not generally have a third dimension other than thickness, the substrate must be made to be flexible enough that the substrate can be shaped to the user's body at the point of attachment. In addition to being flat, the general shape of the substrate 114 can be contoured. In one embodiment (not shown) the contour shape may be such that the narrowest point of the contour is in the crotch area of the substrate 114 closest to the vulva region. The contour shape is one of many possible shapes, in which the substrate 114 and the absorbent article can be prepared. Other forms may be used without departing from the scope of the present description. Generally, yes.
the selected shape should be such that the substrate 114 contour absorbent article
100 they are comfortable to wear, while providing protection for the user.
It should be noted that a form of can also be used in conjunction with a three-dimensional substrate.
The substrate can be any desired color or it can be translucent. In addition, the substrate may have a matte finish, a satin finish, or a smooth finish. Translucency or particular determined color is a matter of choice for the manufacturer of the absorbent article of the present disclosure. However, providing a substrate 114 which is translucent can assist the wearer to the wearer in placing the absorbent article 100 prior to use, as the wearer will be able to see where the article is placed compared to the genitalia. of the user.
Absorbent Gel and Skin Adhesive Compositions
The absorbent gel and skin adhesive composition 121 is designed to absorb exudates from the body including menstrual fluid, blood, urine, and other body fluids such as sweat and vaginal discharge. The gel composition 121 has a longitudinal direction 1 and a lateral direction 2 and is shown in Figures 1-3, and a thickness in the z-direction 3, as shown in
- «I
AND
TO THE
ÚiJ .. _
H ..... r. ·. ' Figure 4 and Figure 5. Generally, the composition '^ d'é ....' .Λ / '<sup>Λ</sup> '' first side 115 toe »» in Figures 1-4. By gel 121 it will be placed at
114, as can be seen adjacent to the substrate one side of the clearly means that the gel composition 121 is directly in contact with the first side 115 of the substrate 114 or can be separated by one or two additional layers or a pressure sensitive adhesive or construction.
In addition to absorbing body fluids, gel composition 121 makes contact with the skin and hair, if present, in the vulva region and possibly in the pubic and / or perineal region of the wearer's body. thereby supporting and holding absorbent article 100 against the wearer's body during use. The gel composition 121 should not be an irritant to human skin or be adhesive to the point where it causes pain to the wearer / wearer when the absorbent article is removed from the skin. The gel composition 121 should also not leave any substantial amount of residue on the wearer's skin surface when the absorbent article is removed by the wearer after use.
Gel composition 121 should form a sufficiently strong bond with substrate 114 such as to prevent premature peeling or delamination of the substrate or absorbent article; however, the gel composition requires remaining gently attached to the skin surface. Write '' xC to be easily removed and / or reapplied ^ W¡8 ^ dá: ^ 3í¿ Therefore , the gel composition 121 should provide a greater peel strength relative to the bond between the gel composition and the substrate than the peel strength relative to the bond between the gel composition and a user's skin surface . In one embodiment, the gel composition 121 provides a peel strength of the gel composition to the substrate of more than about 800 grams per inch and, in other incorporations, from about 800 grams per inch to about 1,500 grams per inch or from about 900 grams per inch to about 1,000 grams per inch.
As the gel composition 121 is applied to the skin to maintain the absorbent article
100 In position during use, the gel composition must possess a high peel strength of the composition to the skin to hold the absorbent article in place while remaining soft on the skin surface. In one embodiment, the gel composition has a peel strength of the composition to the skin from about grains per inch to about 100 grams per inch and in another embodiment from about 20 grams per inch to about 1,000 grams per inch.
In other incorporations, the gel composition peeled from the gel composition
121 has a skin resistance of less than
<img file="MX336256B_D0038.tif" />
....... .
about 50 grams per inch, less than about 2'5 "', grams per inch, less than about 30 grams per inch or even less than about 20 grams per inch or even less than about 5 grams per inch. In still other additions, the gel composition has a peel strength of the composition to the skin from about 75 grams per inch to about 500 grams per inch or even from about 100 grams per inch to about 200 grams per inch.
To measure the peel strength of skin adhesive compositions, a method similar to STM 5599 may be used. Said STM 5599 is fully described in US Patent Application Series No. 12 / 267,806, the which is incorporated here for all relevant and consistent purposes.
As shown in FIG. 1, the absorbent gel and skin adhesive composition 121 may lie on a portion of the first side 115 of the substrate 114, however, the gel composition may lie on the entire first side of the substrate 114 without departing from the scope of this description. Generally, gel composition 121 will be present on at least the center portion of first side 115 of substrate 114 near the center of absorbent article 100. The gel composition 121 can also be patterned on the first side 115 of the absorbent article. The
<img file="MX336256B_D0039.tif" />
gel composition 121 can be applied to the first side 115 of the
<td>substratum</td><td> 115</td><td>using</td><td>any process</td><td>known</td><td>including</td><td>the</td>
<td>Print</td><td>of</td><td>jet</td><td colspan="2">ink, printing</td><td>grid or</td><td>the</td>
<td>extrusion</td><td>of</td><td colspan="2">the absorbent composition</td><td colspan="2">and adhesive for</td><td>the</td>
skin from one or more nozzles, grooved lining and the like.
The absorbent gel and skin adhesive composition 121 can be placed on the first side 115 of the substrate 114 in an open or closed pattern. By open pattern is meant that the composition has an intermittent or non-continuous pattern. For example, there may be breaks in the absorbent gel and skin adhesive composition on certain parts of the first side 115 of the substrate 114. In an open pattern incorporation of the gel composition and skin adhesive, the individual beads or beads of the composition are applied in a non-continuous manner. In a closed pattern the gel composition 121 is continuous. In the present disclosure, the closed pattern may be advantageous since the absorbent and skin adhesive composition 121 can form a seal with the wearer's skin which will help prevent seepage. Additionally, a closed pattern helps to increase the surface area of gel composition 121 that is available to absorb secreted body fluids.
<td></td><td> ··.· : ‘1 ’</td><td>'s Λ' V- . ·. <J 1</td>
<td> 31</td><td>¡Ii ·.</td><td> . · ' ;</td>
<td></td><td>[J ......</td><td></td>
In an embodiment of the present disclosure, vi <sup>1 </sup>· / J \ l'¿J: O 'I the absorbent gel and adhesive composition for is placed on the first complete side 115 of the substrate 114 (not shown). In another alternate embodiment of the present disclosure and as shown in Figures 1-5, the gel composition 121 is placed along the center portion of the first side 115 near the center of the substrate 114.
In one embodiment, the weight of the absorbent gel and skin adhesive composition 121 of the absorbent article 100 is from about 1 gram per square meter to about 450 grams per square meter. In another embodiment, the weight of the absorbent gel and skin adhesive composition 121 of the absorbent article is from about 50 grams per square meter to about 150 grams per square meter.
In some additions, the gel composition is capable of absorbing up to about 20 percent, up to about 50 percent, up to about 100 percent, up to about 250 percent, or even up to about 1,000 percent of its weight in water and, properly, body fluids.
The water content of the gel composition can be determined as follows:
<img file="MX336256B_D0040.tif" />
% water content = 100 x (W<sub>w</sub> - W<sub>d</sub>) / W<sub>w</sub> . J
Iridustifcj Where W<sub>w</sub> is the weight of the wet gel composition and W<sub>d</sub> is the weight of the dry composition.
Generally, the gel composition 121 is applied in a manner which is symmetrical about the longitudinal axis which divides the absorbent article 100 and divides the absorbent article 100 into essentially equal parts. This symmetrical pattern provides the user with a balanced feeling when wearing absorbent article 100. The symmetrical pattern also reduces the perception of any associated discomfort when absorbent article 100 is removed from the body.
<td></td><td>The</td><td>thickness in</td><td>the</td><td colspan="2">composition z-direction</td><td>of</td>
<td>gel placed</td><td>a</td><td>influence</td><td>in</td><td>the</td><td>absorbent capacity of</td><td>the</td>
<td>composition</td><td>with</td><td colspan="2">compositions</td><td>plus</td><td colspan="2">thick being generally</td>
<td>capable of</td><td colspan="2">absorb more</td><td colspan="2">fluid</td><td>that the compositions</td><td>plus</td>
thin.
In one embodiment, the absorbent gel and skin adhesive composition 121 of the absorbent article 100 is defined by a central portion 147 and a peripheral portion 145 (Figure 3). The peripheral part 1455 which, in some incorporations, surrounds and is close to the vulva area and possibly to the user's pubic and perineal regions
<img file="MX336256B_D0041.tif" />
of the user quae- the central 147.
The central part incorporations, it is more feasible to make contact with body fluids including, for example, menstrual and urine, it can be more absorbent than the peripheral part
145. The central part
147 it may also contain openings, pores to direct fluid into the gel composition 121.
The peripheral part 145 can extend to the edge of the substrate 114 without departing from the scope of the present description.
The gel composition 121 can be a single layer or it can be multiple gel layers (not shown) which aid in adhesion to the skin and / or capture and retention of body fluid. In one embodiment, the gel composition has a layer adjacent to the substrate and a body facing layer. The layer adjacent to the substrate may be more hydrophilic than the body-facing layer to help pull fluids out of the wearer's skin and to the parts of the gel composition 121 furthest from the wearer's skin.
The surface of the absorbent gel and skin adhesive composition 121 can be modified to produce different nanostructures and / or microstructures on the surface of the composition. The surface can be manipulated to change the thermodynamic, chemical and / or biological interaction of the gel composition 121 with the skin. By
.... 1?
Rain l_2
J. ,, example, the surface can be modified to redue¿rl'la
UííÍJV; / l'íJ; Jc> ''. Pull force of the adhesive with the skin or it can be ^^ Mfe ^ iC'ád'a · to act as a step base membrane for the regeneration of the tissue and the skin health. An example of a modification of the surface of the polymer adhesive is described in the work of Mhdavi et al., Entitled A Biodegradable and Biocompatible Gecko-inspired Tissue Adhesive PNAS, volume 105: 7, pages 2307-2312, the full contents of which which are incorporated here for all relevant and consistent purposes.
In one embodiment, the gel composition
<img file="MX336256B_D0042.tif" />
Absorbent and skin adhesive 121 is a coating that covers the individual strands of a non-woven substrate 114.
The gel composition coating can be applied by coating the specific parts of the nonwoven substrate with a gel precursor composition and initiating polymerization as more fully described below. The thickness of the coating can be varied through the thickness 20 of the nonwoven substrate. For example, the coating of the gel composition 121 on the strands of the nonwoven substrate may be thicker near the garment facing portion of the absorbent article 100 with the thickness generally decreasing toward the body facing surface. 25 of the article to help pull fluid out of the wearer's skin.
<img file="MX336256B_D0043.tif" />
<img file="MX336256B_D0044.tif" />
components
The article modifiers gel composition 121.
absorbent 100 can contain ^ rlstsir'.v<sup>1</sup>
Cf® to / '.u · L of fluid in the substrate 114
Such fluid modifying components included anti-fouling agents that prevent fibrous (more absorbent) clamping.
of the body fluids absorbed into the network fully described below) within the article
Such anti-fouling agents prevent the pores of the article 100 from clogging and allow the article to be carried for a longer period of time as a replacement.
fluid is a clot and / or that the without
Another example of a coagulant which thickens when
Typically, the face to the surface of a modifying component causes the coagulant contract to be located near the coagulant absorbed fluid.
from the garment surface of the article rather than near the face to the body of the article in order to fix the absorbed fluids out of the skin and give the wearer a feeling of dryness. Coagulants include, for example, psyllium husk, zeolite, chitosan polysaccharides.
Absorbent article 100 may contain a super absorbent material which increases the ability of gel composition 121 to absorb fluid relative to its own weight.
super absorbent material can be a large quantity
Generally said, of a generally water-insoluble and water-swellable polymeric absorbent material, which is capable of absorbing at least about 15 times, f
l
<img file="MX336256B_D0045.tif" />
properly around times or more weight in salt water with 0.9 times of 30 times and possibly around *
Physiological salt water was pissed © <sub>M</sub> IridusW 100% by weight of NaCl).
The absorbent article 100, including the substrate
114 u and the gel composition 121 must be sufficiently moldable and / or elastic so that the article conforms to the contours of the body when the user moves during her routine
<img file="MX336256B_D0046.tif" />
daily. Gel composition 121 must be capable of conforming to different vulva dimensions and the presence of pubic hair such that the gel composition provides a continuous fluid impervious seal. The measurement of conformation can be determined and measured as described in US Patent Application Publication 15 America No. 2004/0116883, the contents of which are incorporated herein by reference for all relevant and consistent purposes. In one embodiment, the gel composition 121 has a protrusion-separation area of at least about 20 square millimeters and, in another embodiment, 20 of at least about 40 square millimeters.
Using a Perforated Lining
Referring now to FIG. 4 and FIG. 5, 25 in one embodiment, absorbent article 100 includes an absorbent core 122 and a perforated liner 123. Perforated liner 123 may be placed between absorbent core 122
To 'όΐίβ' íUÚ the liquid absorbetótotúú ^ tv the perforations of the and the body of the user so that
122 In between the perforated liner 123 and this arrangement, fluid passes through the perforated liner substrate 123 and is absorbed into the absorbent core 122.
Because liner 123 separates the absorbed fluid from the wearer's skin, the absorbent article provides a feeling of dryness to the wearer.
Absorbent core 122 can include any material that generally absorbs body fluids and, in one embodiment, includes an absorbent gel composition. In a particular embodiment, the absorbent core 122 includes an absorbent hydrogel composition and, in another embodiment, it comprises an airgel composition. The hydrogel and airgel compositions are more fully described below.
Perforated liner 123 may be perforated according to any methods known in the art including, for example, a series of indentations or a series of orifices sized and adapted to allow body fluids (eg, menstrual fluids) to pass . Perforated liner 123 can be constructed of many materials and, for example, can be a polymeric film, a woven fabric, a non-woven fabric, or the like, as well as combinations or compounds thereof. Optionally, perforated liner 123 can be formed of one material or more materials. Perforated liner 123 must be able to handle different secretions from the body depending on the type of product. In the products!
careful to be able to woman, frequently the perforated lining to handle menstrual fluids and I heard
<img file="MX336256B_D0047.tif" />
Furthermore, the perforated lining 123 can be comfortable, soft and skin-friendly to the wearer. In the present description, the perforated liner 123 can include a druid-based layer of any operating material, and can be a composite material.
For example, perforated liner 123 can include woven fabric, non-woven fabric, polymer film, non-woven fabric laminate, and film or the like, as well as combinations thereof. Examples of a nonwoven fabric that can be used in the perforated liner include, for example, an air laid nonwoven fabric, a spunbond nonwoven fabric, a fusion blown nonwoven fabric, a carded and bonded fabric 15 , a hydroentangled nonwoven fabric, a yarn-tied fabric or the like as well as combinations thereof. Other examples of suitable materials for the construction of perforated liner 123 may include carded and bonded fabrics of polyester, polypropylene, polyethylene, nylon, or other heat-bondable fibers, finely perforated film fabrics, network type, and the like, as well as combinations thereof. These fabrics can be prepared from polymeric materials such as, for example, polyolefins, such as polypropylene, 25 and polyethylene, and bicomponent or bicomponent copolymers or fibers thereof, polyesters in general, including aliphatic esters such as polylactic acid, nylon \ X or any other materials that can be joined by heat. Some minor amount of the non-thermoplastic fibers ^ jgQg ^ os of.
percent by weight) such as rayon or liocel puedJfi '<sup>and</sup>feé '^<sup>fcYES </sup>mixed with fibers that can be bonded with heat.
In. In one embodiment, the perforated liner 123 is a hydrophobic material or is a material that is less hydrophilic than the absorbent core material 122. In another embodiment, the perforated liner 123 is a hydrophobic silicone gel 10.
'·
Other examples of suitable materials for perforated liner 123 are composite materials of a polymer and a nonwoven fabric material. Composite materials 15 are typically in the form of integral sheets generally formed by extruding a polymer onto a nonwoven fabric such as a spunbond material. In a particular arrangement, the perforated liner 123 may be configured to be operationally liquid permeable with respect to the liquids that the article is intended to absorb or otherwise handle. Operational liquid permeability can, for example, be provided for a plurality of pores, perforations, openings, or other holes as well as combinations thereof, which are present or formed in the liner or in the contact layer with the Body.
Openings or other holes can help increase the rate at which body fluids can be moved through
- X ΧΆ - 'ί. and g - Chi of the thickness of the lining or of the layer that makes contact with the body and penetrates inside the other components of the art ^ j ^^ j (for example inside the absorbent core 122). The selected liquid permeability arrangement is desirably present at least on an operative portion of the perforated liner 123 that is designated for placement on the body side of the article. Perforated liner 123 can provide comfort and conformation, and can function to direct body exudates out of the body and into absorbent core 122. Perforated liner 123 can be configured to retain little or no fluid in its structure, and can be configured to provide a relatively comfortable, non-irritating surface close to a user's skin. In the present description, the perforated liner 15 123 placed on the absorbent core 122 may have a surface which is etched, printed, or otherwise imparted with a pattern.
In one embodiment, the perforated liner 123 is dimensioned and shaped to cover the vulva region of a wearer. This allows a portion of the absorbent core 122 not to be covered by the liner 123. The portion of the core 122 not covered by the liner 123 can be used to adhere the absorbent body to the wearer.
Additional layers or substrates, including for example, a liquid acquisition and distribution layer 'i: .. / (not shown) also referred to as a surge layer or' * a transfer layer, and an optional tissue layer ^^ can also be incorporated into the absorbent product 100, '' for example, between the perforated lining 123 and the absorbent core 5 122. The distribution layer may be shorter than the absorbent core or it may be the same length as the absorbent core 122. The distribution layer serves to temporarily retain a discharge fluid to allow the absorbent core 122 long enough to absorb the fluid , 10 especially when a super absorbent material is present.
Absorbent Hydrogel Compositions and Skin Adhesive
The present disclosure makes provision for gel compositions to both absorb body fluids and to bond a substrate, such as an absorbent article, to the skin. These multi-functional gel compositions allow the article to move better with the body allowing superior filtering protection and resulting in a reduction in the separation between the material and the wearer's body, thereby increasing fluid interception and reducing potential. for fluid filtering.
The gel compositions described herein may be suitable for use as the absorbent gel and skin adhesive composition 121 illustrated in Figures 1-3 and as the absorbent material for the absorbent core 122 'ν /' V
<td colspan="2">illustrated in the figure</td><td colspan="4">4 and in figure 5.</td><td>Yet</td><td>when</td><td>the -/</td>
<td>composition</td><td>gel</td><td colspan="2">core</td><td>absorbent</td><td> 122</td><td>don't re</td><td></td><td>to be</td>
<td>adhesive to</td><td colspan="2">skin like</td><td>the</td><td>adherence to</td><td>the</td><td>skin</td><td>can</td><td>to be -</td>
provided by liner 123, the absorbent core gel composition may be adhesive and absorbent without departing from the scope of the present disclosure. The descriptions given herein in relation to absorbent gel and skin adhesive compositions also apply to absorbent gel compositions suitable for absorbent core 122 of absorbent articles 100 illustrated in Figure 4 and Figure 5.
Absorbent gel and skin adhesive compositions are generally compatible with absorbent substrates and articles. Particularly, even when described in terms of using the absorbent gel and skin adhesive composition with an absorbent article, it should be recognized that the absorbent gel and skin adhesive composition can be used with any of the substrates used for the components of the absorbent article or for any other substrate known in the art for personal care.
In one embodiment, the absorbent gel and skin adhesive composition is a hydrogel (synonymously hydrogel composition). The hydrogel can be a polymerization reaction product of a composition
<img file="MX336256B_D0048.tif" />
hydrogel as described in the application ^ ^
United States of America No. 11 / 709,996 ^ la ctid ·! *<sup>3</sup> here for all the relevant relerftéáST ^ r patent precursor purposes are consistently incorporated.
The hydrogel composition can suitably be of any color and in one embodiment, it can be a clear gel solution. Clear gel solutions contain an absence of precipitates or a limited amount of 10 precipitates and are demonstrated when there is no visible residue or precipitates in the formulation with the naked eye or unaided.
In one embodiment, the hydrogel composition 15 is formed from a precursor composition that includes a monomer, an initiator, a cross-linking agent, and a solvent. Although any suitable monomer can be used, exemplary functional monomers include N-vinyl prirolidone (VP), hydroxyethyl methacrylate (HEMA), methacrylic acid (MA), or its salt, styrene sulfonic acid (SSA), or its salt , potassium sulfofopropyl acrylate (KPSA), dimethyl acrylamide (DMA), dimethyl amino ethyl methacrylate (DMAEMA), or its quaternary salt derivative, acrylamido methyl propane sulfonic acid (AMPS) or its salt, and the combination of any of the above 25. Additionally, the acid and salt of an exemplary functional monomer can be included in the hydrogel. In one embodiment, the hydrogels are made from various classes of monomers including acrylates, vinyls, amides, esters, etc., of which are electrically neutral, cationic, or anionic.<sup>; r</sup>The monomers can also be combined to achieve the desired 5 absorbent and / or adhesion properties.
In a particular embodiment, propane methyl acrylamido sulfonic acid (AMPS), or its salt, is used as the hydrogel monomer, either alone or in combination with another co-monomer. AMPS is generally highly hydrophilic, easy to work with and polymerizes in a relatively easy way. Also, AMPS as a monomer has a relatively favorable safety profile. As such, AMPS or its salt may be suitable for large scale production of a hydrogel precursor composition.
In one embodiment, the hydrogel is a cationic acrylate hydrogel. A suitable cationic acrylate hydrogel for use will generally be somewhat lighter in color, viscous and tacky to the touch. The hydrogel tends to be sufficiently adhesive to the subject's skin, but still cohesive enough to be easily removable from the subject's skin and can separate from itself. Examples of specific desirable cationic acrylates are: acryloyloxyethyltrimethyl ammonium chloride which is readily available from CPS Chemical Company (New Jersey, United States of America) or Allied Colloid (England); acryloyloxyethyltrimethyl ammonium methyl sulfate the
<img file="MX336256B_D0049.tif" />
and . :, /
... .. <sup>v</sup>which is available from CPS Chemical Company or Allied Colloid; and acrylamidopropylmethyl ammonium chloride, available from Evonik Degussa (Germany). A process for making hydrogels with these example acrylates is described in detail below.
In one embodiment, the monomer is from about 10 percent to about 80 percent by weight of the composition and in another embodiment, from about 40 percent to about 75 percent by weight of the composition and still from about 50 percent to about 75 percent by weight of the composition.
Hydrogel compositions can be formed by in-situ free radical polymerization of a water-soluble monomer in the presence of water, desirably by ultraviolet curing with at least one initiator, a multifunctional cross-linking agent (s), and a solvent . For example, an appropriate acrylate monomer, water, electrolyte (for example, sodium sulfate), an initiator, or a catalyst (for example, 1-hydroxycyclohexylphenol ketone,
<td>etc.), a</td><td>linker</td><td>crossed</td><td colspan="2">multifunctional</td><td>(by</td><td>example,</td>
<td>methylene-bis-</td><td>-acrylamide</td><td>, etc.)</td><td>and a</td><td>solvent</td><td>(by</td><td>example,</td>
<td>sulfoxide</td><td>dimethyl)</td><td colspan="2">are combined,</td><td>placed</td><td>in a</td><td>mold and</td>
exposed to an appropriate amount of ultraviolet radiation.
Ί .. · .. I
The hydrogel monomer can also be combined with at least one co-monomer to form the hydrogel precursor c <jftfg ^ p¿on. Examples of coTmonomers ^ * ^ os<sup>AND </sup>which can be used include the water soluble co-monomers and even more desirably include the anionic co-monomers. In an incorporation. The amount of co-monomer that can be used can be in the range of about 5 percent by weight to about 50 percent by weight, desirably from about 10 percent by weight to about 30 percent by weight with based on the amount of reagents used. Examples of suitable co-monomers include unsaturated organic carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, itaconic acid, and citraconic acid and salts thereof, unsaturated organic sulfonic acids such as styrene sulfonic acid, methallyl sulfonic acid, 2sulfoethyl acrylate, 2-sulfomethyl methacrylate, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, acrylamidomethylpropane sulfonic acid and the salts thereof, N, N-dimethylacrylamide, vinyl acetate, other radically polymerizable ionic monomers containing a carbon-carbon double bond and useful non-N-vinyl lactam co-monomers with the N-monomer units -vinyl lactam such as Nvinyl-2-pyrrolidone, N-vinyl-2-valerolactam, N-vinyl-2caprolactam, and mixtures thereof. The ionic monomers listed above, the particularly desirable choices are 3-sulfopropylacrylate or methacrylate and the salts thereof.
<sup>47</sup>
Another desirable selection is 2-acrylamido-2-methyl propane. sulfonic acid and salts thereof. The examples involved in the formation of such salts include the sodium, potassium, lithium, and ammonium ions. The ionic monomers can be used singly or in a mixture of two or more monomers.
Any suitable solvent can be used. The desirability of a specific solvent and / or the amount thereof may vary or depend in part on the other components and on the amounts thereof selected to be the hydrogel precursor composition. The use of any solvent capable of dissolving the initiator to an amount equal to the solubility limit of the initiator is desired. In some additions, the solvent is an organic solvent such as, for example, dimethyl sulfoxide and glycerin. In other incorporations, water is the solvent used in the hydrogel precursor composition.
The solvent is adapted to dissolve the initiator (hydrophobic or hydrophilic) and is soluble in water. The solvent can be adapted to dissolve hydrophobic additives such as lipids, antioxidants, drugs, and fragrances. Additionally, the solvent can be adapted to dissolve the skin benefit agent or agents as described below.
<img file="MX336256B_D0050.tif" />
X i
------ í
In one embodiment, the solvent is presentΆ in an amount of up to about 20 percent per pe<sub>p</sub>So * in another incorporation?
the hydrogel precursor composition and, from about 0.5 percent to about 5 percent by weight of the precursor composition
The precursor composition of may include a hydrogel enhancing solubilizer.
hydrogel also polymerization of the monomer, cross-linked and / or as described in the US patent the initiator such
United States of America number 7,045,559, which is incorporated here for all relevant and consistent purposes. Any suitable solubilizer or combination of solubilizers is contemplated.
Desirably the hydrogel of which specific solubilizer can and / or the amount is included in the vary or depend on components and the amounts of the precursor composition in the precursor hydrogel composition.
example include, cyclodextrin cyclodextrin from on behalf of the others to constitute
Solubilizers of eg cyclodextrin, and derivatives of hydrotropes. Specific example solubilizers include, for example, hydroxypropyl β-cyclodextrin (ΗΡ-β-CD) (available from Cargill
Dow, Minnetonka,
Minnesota, United States of America), γ25 cyclodextrin
Corporation, Cyclodextrin (γ-CD) (available
Adrian, Michigan) and Wacker Biochem polymers such as derivatives of such as methacryloyl cyclodextrin. In a particular embodiment, the solubilizer is dimethyl sulfoxide (DMSO). Eft ^ 'ptraincorporación particular, the solubilizer is glycerin. In one embodiment, the solubilizer is present up to about 20 percent by weight of the hydrogel precursor composition and, in another embodiment, between about 0.5 percent to about 5 percent by weight of the hydrogel precursor composition.
The hydrogel precursor composition may include an optional buffer system to help control pH, prevent discoloration (for example, to avoid hydrogel yellowing), and / or to prevent breakage due to the extended presence of water (for example , hydrolysis). The use of the buffer system with the hydrogel composition is desirable to provide the hydrogel with a commercially adequate shelf life (eg, shelf life of over one year) without discoloration. Suitable buffers include, but are not limited to, conventional buffers such as sodium hydroxide, potassium tartarate, and / or sodium phosphate monobasic, all of which are commercially available from Aldrich Chemical Co., Inc. from Milwaukee, Wisconsin, United States of America. The pH of the hydrogel composition can be adjusted as desired. In one embodiment, the compositions include a buffer sufficient to maintain the pH of the hydrogel in a range of from about 3 to about 8.5, and in another embodiment, from about 5.5 to about 7. In one incorp ^^ cXon ^ l ^ a buffer is present in the precursor composition of ^ hydrogel in an amount of up to about 10 weight percent and in another incorporation from about 0 weight percent to about 5 percent by weight of the hydrogel precursor composition.
As an alternative to the use of conventional buffers, a quantity of the acidic form of the monomer used can be employed in the hydrogel precursor composition. An amount of the acidic form of the monomer will be combined with the monomer salt so that an additional conventional buffer may not be necessary. In this regard, the pH is conventionally adjusted in hydrogels by using a dual buffer system including a non-monomeric acidic salt such as potassium aluminum sulfate and an additional buffer having a pH greater than 7 such as sodium hydroxide. For example, conventionally, potassium aluminum sulfate or other non-monomeric acidic salt is added to the hydrogel precursor composition in an amount to stabilize the resulting polymer, however, the amount used may result in an unacceptable drop in pH. . Due to this drop in pH, sodium hydroxide, or another buffer having a pH greater than 7, is added to the hydrogel precursor composition to bring the pH to a satisfactory level.
Additionally, & · an acidic salt can gfe by itself and not as part of a buffer * system to keep the pH in the desired range.
However, using the monomer salt in conjunction with the acid (as a pH adjuster) eliminates potential problems such as buffer incompatibility with the monument while still increasing shelf life and solution stability. monomer.
Other additives may be added such as, for example, skin benefit agents as described below. These other additives can be included either before or after the curing step. The appropriateness of such additives will generally depend on the intended end use of the particular hydrogel. Any suitable additive or combination of additives such as those suggested above or below is contemplated. The specific additive and / or the amount thereof which is included and may vary or depend in part on the other components and on the amounts thereof selected to constitute the hydrogel.
The skin benefit agent may optionally not be present in a hydrogel but may act as a separate hypoallergenic layer in communication with the hydrogel in order to reduce irritation to the user's skin.
The polymerizations described here.
initiators can be used
Wdusfef the hydrogel precursor compositions
Examples of the initiators which can be used include IRGACURE 184 (1-hydroxycyclohexyl phenyl ketone), IRGACURE 2959 (4- (2-hydroxyethoxy) phenyl- (2hydroxy-2-methylpropyl) ketone)), and DAROCUR 1173 (2 -hydroxy-2methyl-l-phenyl-propane-l-one), all of these commercially available from Ciba Specialty Chemicals. These UV 10 ultraviolet primers are not yellowing. Additional examples of suitable examples (which may be photoinitiators or thermoinitiators) may include benzoyl peroxide, the
<img file="MX336256B_D0051.tif" />
azo-bis-isobutyro-nitrile, di-t-butyl peroxide, bromyl peroxide, cumyl peroxide, lauroyl peroxide, isopropyl percarbonate, methylethyl ketone peroxide, cyclohexane peroxide, butyl hydroperoxide, di-t-amyl peroxide, dicumyl peroxide, t-butyl perbenzoate, benzoin alkyl ethers (such as benzoin, benzoin isopropyl ether, and benzoin isobutyl ether), benzophenones, (such as benzophenone and methyl-20 benzoyl benzoate), acetophenones (such as acetophenone, trichloroacetophenone, 2,2-dimethoxy-2-phenyl-acetophenone, and pdimethylaminoacetophenone), thioxanthones (such as xanthone, thioxanthone, 2-chlorothioxanthone, and 2-isopropylthioxanthone), benzyl
2-ethyl anthraquinone, methylbenzoyl formate, 2-hydroxy-225 methyl-l-phenylpropane-l-one, 2-hydroxy-4'-isopropyl-2-methyl propiophenone, α-hydroxy ketone, tetramethyl thiuram mono
<img file="MX336256B_D0052.tif" />
sulfide, allyl diazonium salt, and combinations of camphorquinenyl · and ethyl 4- (Ν, Ν-dimethylamino) benzoate. Another in ^ fe & Obes., ...; Suitable ones can be found in, for example, Berner et al., Photo Initiators — An Overview, J. Radiation Curing (April 1979), page 29.
Although only one initiator is typically used in the hydrogel precursor composition, the composition may contain one or more second initiators. The one or more second initiators may be photo initiators or chemical initiators.
In one embodiment, the amount of initiator is from about 0.01 percent to about 5 percent by weight of the hydrogel precursor composition, and in another embodiment, from about 0.05 percent to about 2 percent by weight of the hydrogel precursor composition and, in yet another embodiment, from about 0.1 percent to about 0.5 percent by weight of the hydrogel precursor composition. Where one or more second initiators are present, the number of one or more second initiators in some additions is from about 0.01 percent by weight to about 5 percent by weight, from about 0.05 percent by weight to about 2 percent by weight, or from about
0.1 weight percent to about 0.5 weight percent of the hydrogel precursor composition. Where multiple initiators are present, it is preferred that the
<img file="MX336256B_D0053.tif" />
<img file="MX336256B_D0054.tif" />
initiators are about a combined amount of one hundred or less per hydrogel and, at another incorporation weight, precugtofl® ^ -> composition
from about percent by weight to about 5 percent by weight of the hydrogel precursor composition.
The UV curing parameters that achieve the desired polymer properties are conventional and within the skill of the skilled artisan. A photo initiator 10 tends to operate by absorbing the selected UV wavelengths to produce the radical initiation species to induce monomer polymerization. Wavelengths and cured area set the style of the UV bulb used in the curing process. Inhibition of polymerization due to dissolved oxygen, monomer inhibitors, or other radical scavenger halves can be overcome by changing the potency by pulsation and / or by using initiator accelerators.
Each initiator photo is typically responsible for a specific or narrow wavelength range of ultraviolet light. In an embodiment of the present disclosure, two or more photo initiators are included in the hydrogel precursor composition. The addition of more than one initiator in a hydrogel precursor composition allows for a broader range of energy or a range of wavelengths emitted by an ultraviolet source to be used. The solubility limit concerns
i '¡k' · 'use of multiple initiators can also redudXxvk <sub>¡T</sub> 'fej could be related compatibility concerns, since more efficient polymerization achieved with initiators present in the precursor composition than with any of the initiators used alone in the two hydrogels the same general initiator concentration.
The synergistic effect of initiators has not been previously identified or exhibited in previous hydrogels which incorporated a photo initiator, if any initiator at all. It is further believed that the inclusion of initiators
<img file="MX336256B_D0055.tif" />
having different initiator rates and / or the inclusion of initiators which begin initiation of monomer polymerization at different times relative to each other (such as that which may be experienced by multiple initiators (eg, a chemical initiator thermally activated (TACI) and a photo initiator)) contributes to a higher yield polymerization. This is, for example, where two photo initiators are included, one may have a lower wavelength activator and may be more energetic (providing for a faster initiation and reaction rate) than the other initiator which is activated. by a superior ultraviolet wavelength or range.
The fastest initiator can also die or be consumed faster than the other. It is contemplated that it may be advantageous to have a polymerization that occurs at different rates and / or at a mixed rate which may not be obtainable with an initiator or with an initiator the hydrogel precursor composition and - \ .Z · which is suitable
An example of particular.
initiators which are not activated or are activated simultaneously, includes the use of a photo initiator and a thermally activated chemical initiator in the hydrogel precursor composition where the photo initiator is activated by an ultraviolet source and reacts with the monomers in the precursor composition enough to generate heat to activate the thermally activated chemical initiator.
Although numerous combinations and variations of the initiators are possible, the combination of the multiple initiators is considered to provide more favorable kinetics that provide a higher probability of more extensive polymerization of the monomer and / or other monomeric residues.
In one embodiment, the thermally activated chemical initiator is included in the hydrogel precursor composition to take advantage of the benefits of multiple initiator polymerization. As some of the heat is necessary to activate the thermally activated chemical initiator, it is contemplated that a thermally activated chemical initiator is generally included only where the heat will be present in or produced in the hydrogel precursor composition in an amount sufficient to activate the
<img file="MX336256B_D0056.tif" />
Chemical polymerization initiator known as that thermally activated. Since the photo initiation-induced radical reactions are QFF ^^ Qgf are exothermic and therefore generate heat in response to ultraviolet exposure, the thermally activated chemical initiator can be included in a hydrogel precursor composition where a photo initiator is also present as to allow the thermally activated chemical initiator to take advantage of the heat generated by the photo 10 initiator-induced radical polymerization reaction. It is also contemplated that the thermally activated chemical photoinitiator may be included where multiple photoinitiators are present. The presence of multiple photo initiators provides the potential benefits of multiple initiators discussed above 15 but also provides activation of a thermally activated chemical initiator where the heat generated by a photo initiator may be insufficient to activate, or else fully activate the thermally activated chemical initiator (depending on the photoinitiators and the thermally activated chemical initiator involved) wherein the thermally activated chemical initiator may further promote or complete the polymerization of the functional monomer and other monomeric residues in a precursor composition of hydrogel. Multiple thermally activated chemical initiators can also be used.
<img file="MX336256B_D0057.tif" />
Agents in used cross form hydrogels.
Multifunctional crossovers include, for example, methylene LOS used for binding: binding agents which may be bis-acrylamide and diethylene glycol diacrylate which are both commercially available from Polysciences, Inc. of Warrington, Pennsylvania, United States of America. . Other cross-linking agents which can be used include poly (ethylene glycol) diacrylate, triethylene glycol-bis-10-methacrylate, ethylene glycol-bis-methacrylate, ethylene glycol dimethacrylate, bisacrylamide, triethylene glycol-bis-acrylate, 3,3'-ethylene-bis (N-vinyl-2-pyrrolidone), trimethylolpropate trimethacrylate, glycerol trimethacrylate, polyethylene glycol dimethacrylate, and other multifunctional polyacrylates and 15 cross linkers of polymethacrylate.
In one embodiment, the amount of cross-linking agent present in the hydrogel precursor composition is from about 0.01 percent by weight to about 2 percent by weight of the hydrogel precursor composition and, in a particular embodiment, from about 0.05 weight percent to about 0.5 weight percent of the hydrogel precursor composition.
Regardless of the technique used, cross-linking forms a hydrogel consisting of a three-dimensional network that is essentially insoluble in water. To the
<img file="MX336256B_D0058.tif" />
<img file="MX336256B_D0059.tif" />
absorbing the water, the hydrogel swells, thereby increasing the area between the crosslinks to forr ^ faperos.
Ls b ^ Λ *
For example, at its highest water content, the hydrogel may have pores having an average size of from about one manometer to about 10 microns, in some additions from about 10 nanometers to about one micron, and in some additions from around 50 nanometers to around 100 nanometers. Therefore, when exposed to water, the hydrogel does not dissolve, but can instead absorb a certain amount of water. Therefore, the hydrogel composition is capable of absorbing body fluids.
*
<img file="MX336256B_D0060.tif" />
In some incorporations, at least one surfactant is included in the hydrogel precursor composition or is added to the hydrogel. It is believed that the presence of a surfactant can increase the water and moisture absorbency rate of the hydrogel. Exemplary surfactants include, for example, alkyl polyglycosides; silicones modified to contain alkyl, polyglycol, and / or amino groups (eg, ethoxylated polydimethyl siloxanes); the alkylphenol ethoxylate surfactant; and the like. Commercially available examples of the alkyl polyglycosides include Glucopon 220, 225, 425, 600 and 625, all available from the Cognis Corporation. These products are all mixtures of alkyl mono- and oligoglucopironasides with alkyl groups passed over fatty alcohols derived from coconut and / or
<img file="MX336256B_D0061.tif" />
of palm kernel oil. Glucopon 220, 225, and 425 are examples of suitable partial alkyl polyglycosides. Glucopon 220 is an alkali polyglycoside H ^^ ® ^ which contains and mixes an average of 1.4 glucosyl residues per molecule of 8 and 10 alkyl carbon groups (average carbons per linear alkyl alkyl polyglucoside.
alkyl chain-9.1).
of related alkyl having on average-9.1
Glucopon
The with
Glucopon groups
225 is an alkyl or 10 carbon atom (chain of carbon atoms) in the chain of
425 it includes a mixture of alkyl polyglycosides which individually include an alkyl group with 8, 10, 12, 14 or 16 carbon atoms (average alkyl chain 10.3 carbon atoms). The Glucopon 600 includes a mixture of alkyl polyglycosides which individually include an alkyl group with 12, 14 or 16 carbon atoms (average alkyl chain 12.8 carbon atoms). Glucopon 625 includes a mixture of alkyl polyglycosides which individually include an alkyl group with 12, average 12.8 polyglycosides of TL 2141, one or 18 alkyl atoms
Glucopon carbon atoms (carbon alkyl chain). Another example of a suitable commercially available is
220 Analog available from ICI. BASF
Corporation offers MASIL silicones that are modified to contain alkyl, polyglycol, amino groups, which can be included in the precursor hydrogel composition. For example, MASIL SF-19 is a modified silicone glycol.
<img file="MX336256B_D0062.tif" />
The hydrogel composition can be used in sheet form as the absorbent gel composition 121 of 'á Ó * <sup>1</sup> or absorbent article 100 illustrated in Figures 1-3 or absorbent core material 122 of absorbent article 100 illustrated in Figures 4 and 5. The hydrogel composition may also be in particulate form when used as the absorbent core 122 of the absorbent article. 100 illustrated in Figure 4 and Figure 5. The hydrogel composition 121 includes an adhesive gel composition with a hydrogel particulate mixed therein.
The hydrogel composition can be between
<img file="MX336256B_D0063.tif" />
placed in a fibrous tissue to improve the mechanical properties of the hydrogel as described in the United States patent application for
America series number
11 / 513,831 purposes as one of which relevant matrix of is incorporated and consistent.
support absorbent gel composition essentially under conditions here for all
The fabric may improve stiffness and adhesive for wet. Also, skin acting, weaving can provide a fiber structure, pore size, and pore distribution that achieves ready-made handling of aqueous fluids. For example, a fusion blown fabric which has a relatively small pore size is useful for transmitting and distributing an aqueous fluid over a large area, while a carded and bonded fabric is useful for applications where capacity is desired. retention
<img file="MX336256B_D0064.tif" />
high fluid. Fluid handling capacity can be controlled by the relative hydrogel content in the fibrous-hydrogel tissue compound.
The hydrogel polymer can be integrated with the fibers of a fabric. For example, the hydrogel polymer can be interlocked with the fibers of the tissues. As such, the hydrogel polymer cannot be easily separated from the fabric and is effectively a permanent part of the fabric structure 10. Therefore, the hydrogel allows the tissue to absorb water or moisture (including water vapor) to
<img file="MX336256B_D0065.tif" />
a much larger extension than the tissue alone. For example, in one embodiment, the hydrogel polymer is integrated into a hydrophobic fibrous tissue that may not otherwise absorb any substantial amount of water or moisture, changing a relatively hydrophobic tissue to be absorbent of water and moisture.
In some additions, the hydrogel spreads through the tissue. For example, the hydrogel can extend beyond the thickness of the tissue. As such, the thickness of the tissue will be smaller than the thickness of the hydrogel. Without wishing to be bound by any particular theory, it is believed that the absorption and adhesion ability to the skin of the fibrous tissue and hydrogel composition can be improved by having the hydrogel extended beyond the thickness of the tissue so that the exposed outer layer of compound
A> -
<td>be primarily the hydrogel.</td><td></td>
In order to integrate the hydrogel polymer into the fibrous tissue, the hydrogel precursor composition described above is allowed to saturate the fibrous tissue before the composition is cured.
monomer polymerized fibrous tissue. With the resulting hydrogel, fibers of the being are integrated between
The hydrogel polymer is then saturated polymerization, forms within and impregnated with the fibrous tissue polymer, effectively the hydrogel polymer within the tissues. For example, the hydrogel polymer can mix with the fibers of the fabric. Also the hydrogel polymer typically cross-links with itself to form a three-dimensional polymer network that is integrated therewith, the network within the fibers of and intermixed with the fibers of the tissue. Hydrogel polymer cone is physically integrated tissue and cannot be easily separated from tissue.
the
In some incorporations, depending on the nature of the hydrogel fibers used, and the energy source employed to initiate polymerization, the hydrogel polymer may also have additional bonds or chemical forces further attracting the hydrogel to the tissue fibers. For example, the hydrogel polymer can be cross-linked with the fibers
<img file="MX336256B_D0066.tif" />
of the fabric, forming covalent bonds with the fabric fibers. In other incorporations, other forces qu ^^ ás .taj.<sup>1</sup>Like van-der-Waals forces, hydrogen bonding, ionic, etc., they also integrate the hydrogel polymer into the fibers of the tissue.
The amount of hydrogel integrated within the fibrous tissue can be controlled by the amount of the hydrogel monomer present in the hydrogel precursor composition.
As such, controlling the amount of hydrogel in the tissue
<img file="MX336256B_D0067.tif" />
Composite allows control of the skin adhesion properties of the composite fabric and the amount of water or moisture that can be absorbed by the composite fabric, depending on the intended use of the fibrous tissue compound and the hydrogel, the hydrogel may be present in the composite of fibrous tissue and hydrogel at relatively high proportions.
In some incorporations, the ratio of hydrogel to fibrous tissue is at least around 10: 1, at least around 15: 1, at least around 30: 1, at least 20 around 50 : 1 or even at least around
100: 1. In other incorporations, the ratio of hydrogel to fibrous tissue is from about 1: 1 to about
100: 1, from about 5: 1 to about 100: 1, from about 10: 1 to about 100: 1, or even from about 30: 1 to about 100: 1.
<img file="MX336256B_D0068.tif" />
Expressed in terms of basis weight, in some additions, the hydrogel is present in the fibrous tissue compound and hydrogel at basis weights from about grams per square meter to about 100 grams per square meter, from about 50 grams per meter square to about 900 grams per square meter, from about 100 grams per square meter to about 800 grams per square meter, from about 200 grams per square meter to about 700 grams per square meter, or even 10 from about 300 grams per square meter to about 600 grams per square meter.
The location of the integrated hydrogel within the tissue may be somewhat tissue structure of the precursor composition controlled by and the manner of hydrogel upon wetting and application of the tissue. For example, application of the hydrogel precursor composition to only one side of the tissue, and subsequent polymerization, may result in the hydrogel polymer being present primarily on that side of the tissue. Viscosity modifiers can also be added to increase the viscosity of the hydrogel precursor composition to allow for controlled placement and hydrogel formation after polymerization.
As one skilled in the art will recognize, any method of saturating and / or impregnating the hydrogel precursor composition into the tissue can be employed.
For example, the formation of the hydrogel precursor may be doBcl'u. . <applied to fibrous tissue using any conventional technology such as a bar, roller, knife, curtain, foam, print (eg, gravure), die-groove, drop coating, or dip coating techniques. For example, the hydrogel precursor composition can be applied topically to the external surfaces of fibrous tissue. In a particular embodiment, the hydrogel precursor composition is uniformly applied to one surface or both surfaces of the fibrous tissue.
In one embodiment, the fibrous tissue is passed over a guide roller and into a bath with treatment time controlled by the first and second guide rollers located within the bath. The pressure point between the first and second squeeze rollers down the bath removes any excess hydrogel precursor composition which can be returned to the bath.
In other application techniques, where one wishes to treat only a single side, and not the inner layers or the opposite side of the fibrous tissue, other processes may be used, such as the rotating grid, a reverse roller, a rod Meyer, engraving, slot-die, separation coating, etc. However, still agree
ΓΛ For application techniques, a sufficient amount of the hydrogel precursor composition penetrates daÍGfbá ^ idor irtéusWsl allowing the hydrogel to be integrated into the fibers with polymerization.
Regardless of the tissue saturation or impregnation method, the saturated and / or impregnated hydrogel monomers within the tissue can be polymerized, either before or after drying the tissue, depending on the polymerization initiation method 10. For example, when an ultraviolet initiator is present in the hydrogel precursor composition to initiate polymerization of the hydrogel monomers with the application of ultraviolet radiation, the tissue can be passed under an ultraviolet lamp (not shown) for a specified time. allowing the desired degree of polymerization, before drying the fabric. The fabric can then be further dried, if necessary, by running over the dryer cans or other drying means and then wound between the two 20 layers of paper or release film, like a roll, or it can be converted for the use for which it is intended. Alternate drying means include ovens, continuous air dryers, infrared dryers, air blowers, and the like.
Drying the fibrous tissue compound and hydrogel can control the water content of the compound, the
7 'which can affect the amount of water that the hydrogel can absorb. In most applications, the confused fibrous and hydrogel * '' water of the hydrogel in the tissue composition will be relatively low, allowing more water and moisture to be absorbed by the hydrogel. In one embodiment, the fibrous content e by weight m percent water of the hydrogel in the hydrogel tissue compound is less than about 20 percent and in another by weight.
incorporation hydrogel water of less than about 15
In other incorporations, the content of the fibrous tissue compound and hydrogel will be less than about 10 weight percent, less than about 5 weight percent, or even less than weight percent.
For example, fibrous tissue can pass over a guide roll from a fibrous tissue supply roll. The fibrous tissue is first impregnated or saturated with the hydrogel precursor composition at a treatment center, then the treated fibrous tissue can be combined with a first release layer supplied from a release layer supply roll. The treated fibrous tissue is then cured in a curing station, such as, for example, by ultraviolet radiation. The fibrous tissue can then be dried in a tumble dryer, and can be combined with a second release layer supplied from a release layer supply roll. Finally, the treated fibrous tissue placed in
<img file="MX336256B_D0069.tif" />
Sandwich between the first release layer and the second release layer can then be rolled back into a new 'ν' M.
It is also understood that the fibrous tissue treatment method with the impregnating hydrogel precursor composition may also incorporate other ingredients into the tissue, such as the skin benefit agents described below. These other additives can be included either before or after the curing step. In some incorporations, the skin benefit agent may be present in the hydrogel precursor composition, which can help the additive to be impregnated into the resulting hydrogel and fibrous tissue compound.
The hydrogel can be integrated into any suitable fibrous tissue, including both woven and non-woven fabrics. In general, the intended end use of the composite fabric will dictate the composition and type of fabric used. In a particular embodiment, the fibrous tissue is a porous fibrous tissue. In this embodiment, the porosity of the fibrous tissue allows the hydrogel to penetrate into the pores of the tissue and for greater transport of water and moisture into the tissue, facilitating the ability of the integrated hydrogel to absorb water and moisture.
Also, in those applications where comfort and ability to breathe are desired, fibrous tissue
ΊΟ
<img file="MX336256B_D0070.tif" />
Porous may have the ability to breathe, allowing air to flow through the tissue, while moisture ^ and water are retained within the tissue. In other incorporations W ^ "^ porous films and foams can also be used in a similar way as porous tissues.
The non-woven fabric may be a spunbond fabric, a co-melt blown fabric, a carded and bonded fabric, or other non-woven fabric including natural fibers.
<img file="MX336256B_D0071.tif" />
and / or synthetic fibers, and may be present in a single layer or in a multi-layer composite including a layer of non-woven fabric or more layers of non-woven fabric. When constructed from synthetic polymers, a wide variety of thermoplastic polymers can be used to construct the nonwoven substrate, including without limitation polyamides, polyesters, polyolefins, ethylene and propylene copolymers, copolymers of ethylene propylene with aolefins C4-C20, ethylene terpolymers with propylene and a C4-C20 α-olefin, ethylene vinyl acetate copolymers, propylene vinyl acetate copolymers, styrene-poly (ethylene-to-olefin) elastomers, polyurethanes. Block copolymers AB where A is formed of poly (vinyl arene) halves such as polystyrene and B is an elastomeric middle block, such as a conjugated diene or lower alkene, polyethers, polyether esters, polyacrylates, ethylene alkyl acrylates, the<sup>71</sup> Poli'ό 'polyisobutylene, polybutadiene, isobutylene-isoprene copolymers, combinations of any of the above Ibs. In some particular incorporations, polyolefins such as polyethylene and polypropylene homopolymers and copolymers can be used to construct the nonwoven fabric. Fabrics can also be constructed of bicomponent or bi-constituent fibers or filaments. Non-woven fabrics can have a wide variety of basis weights, generally ranging from about 10 about 8 grams per square meter to about 120
<td></td><td>grams per square meter.</td>
<td>• TO</td><td>Particularly suitable nonwoven fabrics</td>
<td>w</td><td>they can be hydrophobic tissues such as those that include</td>
<td></td><td>15 polyolefin fibers and polyester fibers. The tissues</td>
meltblown and spun bonded with polyolefin fibers such as, for example, polypropylene and polyethylene can be integrated with hydrogel polymers to change the otherwise hydrophobic fabric to a water absorbent fabric, without essentially affecting the other properties of the fabric.
The type of nonwoven fabric can dictate the function of the resulting fibrous tissue and composite hydrogel. For example, a meltblown fabric, which has a relatively small pore size, is useful for the transmission and distribution of an aqueous fluid over a large area, while
<img file="MX336256B_D0072.tif" />
that a carded and bonded fabric is useful for application when
<td>is desired</td><td>a</td><td>capacity</td><td colspan="2">fluid retention</td><td colspan="2">altá'Jv. The</td>
<td></td><td></td><td></td><td></td><td></td><td></td><td></td>
<td>capacity</td><td>of</td><td>management</td><td>fluid</td><td colspan="2">can be controlled</td><td>for him</td>
<td>content</td><td>of</td><td>hydrogel</td><td>relative</td><td>in the compound</td><td>of</td><td>tissue</td>
fibrous and hydrogel.
In some embodiments, the non-woven fabric may be a composite non-woven fabric, including but not limited to coform fabrics, 10 pulp fiber entangled fabrics, etc. For example, a suitable nonwoven composite fabric may be a polypropylene fabric entangled with pulp fibers, such as the fabric sold under the trademark.
<img file="MX336256B_D0073.tif" />
HYDROKNIT of Kimberly Clark Corporation, Inc. of Neenah,
Wisconsin.
Woven fabric.
In another embodiment, the tissue may be a
For example, certain applications will typically involve woven fabrics of cotton, polyester, nylon, wool, and the like, and combinations thereof.
For example, in some clothing applications, the fibrous fabric may be a woven fabric.
Additionally, the fibrous hydrogel tissue compound can be combined with other tissues to form a laminate. The fibrous or hydrogel tissue compound may be one or more layers of a yarn-blown confusion-yarn-bonded (SMS) fabric.
Λ,
<img file="MX336256B_D0074.tif" />
Air-absorbent and skin-adhesive compositions
In one embodiment, the absorbent article 100 of Figures 1-3 contains an absorbent gel and skin adhesive composition 121 comprising an airgel. Furthermore, the absorbent core material of article 100 illustrated in Figure 4 and Figure 5 may be an airgel. Suitable aerogels include inorganic aerogels, 10 organic aerogels, and carbon aerogels. Aerogels can be produced by polycondensation reactions or by gel-sol processes.
<img file="MX336256B_D0075.tif" />
Inorganic aerogels can be obtained by super critical drying of transparent and highly cross-linked hydrogels synthesized by the polycondensation of metal alkoxides. Silica aerogels are the best known inorganic aerogels. Inorganic silica-based aerogels are typically derived using precursors or monomers such as tetramethyl orthosilicate (TMOS, Si (OCH<sub>3</sub>)<sub>4</sub>), tetraethyl orthosilicate (TEOS,
Yes (OCH<sub>2</sub>CH<sub>3</sub>) <sub>4</sub>), combinations of the above orthosilicates or the like. Inorganic aerogels can be produced according to the methods described in the United States of America patent number 6,670,402 and inorganic silica aerogels can be produced by the methods of the United States of America patent number 7,265,158, both of the
<img file="MX336256B_D0076.tif" />
which are incorporated herein by reference for relevant and consistent purposes.
for all
Organic aerogels can be synthesized by super critical drying of the gels obtained from the monomer sol-gel polycondensation reaction, such as, for example, resorcinol with formaldehyde, in aqueous solutions. Carbon aerogels can be obtained by pyrolyzing organic aerogels at elevated temperatures. Methods for producing organic aerogels and carbon aerogels are described in US Patent No. 7,378,450, which is hereby incorporated by reference for all relevant and consistent purposes.
Organic aerogels can be produced by the reaction of any one or a combination of several monomers in an appropriate ratio with formaldehyde, furfu-ral, or the like in the presence of a catalyst through a polymerization reaction (for example, a reaction polycondensation). The monomer or monomers are preferably a polyhydroxybenzene compound, exemplary incorporations of which include, for example, resorcinol, phenol, catechol, chloroglucinal, combinations thereof, and the like. Reaction of such monomers with formaldehyde or furfural generally produces, for example, resorcinol-furfural, resorcinol-formaldehyde, phenol-resorcinol75 formaldehyde, catechol-formaldehyde, or the like.
Ljh<sup>!</sup>. chloroglucinol-f ormaldehyde ', ÉVfej J;
faith in · - ·> <· Λ> i
In an example polymerization reaction, to form an organic airgel, the reagents (eg, monomers) are mixed with the catalyst to produce the airgel in the form of a monolithic gel, which is then dried by exchange and extraction of solvent.
The resulting organic airgel can then be pyrolyzed in an inert atmosphere (eg nitrogen) to form a carbon airgel. More specifically, the polymerization reaction is a sol-gel polymerization of monomers
<img file="MX336256B_D0077.tif" />
Multifunctional organics in a solvent (eg, water).
Sol-gel polymerization leads to the formation of highly cross-linked transparent or translucent gels (you are hydrogel). A metal can also be added with the monomers, thereby forming an airgel / metallic compound.
In a preferred sol-gel polymerization, a resorcionol (1,3-dihydroxybenzene) template condenses in the presence of a basic catalyst with two moles of formaldehyde. A slightly basic catalyst (eg, sodium carbonate) is preferred. Resorcionol is a trifunctional monomer capable of receiving formaldehyde molecules at the 2-, 4- and / or 6-positions on its ring. The substituted resorcionol rings condense with each other to form clusters of size
Eventually, the clusters their surface groups
<img file="MX336256B_D0078.tif" />
to go.
of nanometer in the solution »cross-link to ^ rWl ^ áél ·, (eg. —CH <sub>2</sub>OH) to form the hydrogel sol.
The size of the clusters can be regulated by the concentration of the catalyst in formaldehyde. More specifically, the resulting resortional surface.
around the mixture of the mole resorcinolde ratio of (R) to the catalyst (C) and the properties
Preferably, the (R / C) controls electrochemical ratio from 50 to about 300. Other the gel area
R / C is of commonly mentioned proportions include resorcionol (R) to formaldehyde (F) (R / F) and resorcinol (R) to water (W) (R / W). Typically, the molar ratios of R / F and R / W are each about
0.01 to about 10.
The hydrogel sol is then cured for a time and temperatures sufficient to establish the airgel structure and form a cured hydrogel. Curing times range from about 2 hours to about 5 days or more. Curing temperatures range from around 25 degrees centigrade (C) to around 150 degrees centigrade. Higher pressures of one atmosphere (atm) can be used to decrease cure time. After curing, RF Atherrojeles can be translucent and dark red or black in color or essentially transparent.
<img file="MX336256B_D0079.tif" />
The next step in organic preparation is to dry the cured hydrogel. If the polymerization solvent is removed from the gel by simple evaporation, large capillary forces are exerted on the pores, thereby forming a collapsed structure, eg, a xerogel. In order to preserve the gel backbone and minimize shrinkage, it is preferable to carry out the drying step under super critical conditions (described hereinafter 10). Other drying steps can also be carried out if desired, usually prior to the super critical extraction step. For example, a solvent exchange may be carried out in which contact the hydrogel with an exchange solvent, before subjecting the cured hydrogel to form the dried airgel.
cured is put on by a
The example, acetone, super critical super extraction extraction can be carried out a super critical fluid, such as liquid carbon dioxide. Also, as an alternative or in addition to the exchange step, surfactants can be used to remove water from the cured hydrogel. The highly porous material obtained from this removal operation is organic airgel. By appropriately adjusting the drying conditions, a hybrid structure having characteristics of both a xerogel and an airgel can be produced. For example, such a hybrid may be produced as a result of partial evaporation of gel solvent under conditions that promote xerogel formation followed by
<img file="MX336256B_D0080.tif" />
the evaporation of the remaining solvent under the condition ^ Éiqpíte promote the formation of airgel. The resulting structure of the QPh ^ g ^ lfe will then be dried under supercr ^ ^ ilic conditions and pyrolyzed. The preparation of other airgel-xerogel hybrids can be produced by first evaporating under conditions that promote airgel formation and completing evaporation under conditions that promote xerogel.
As noted above, one means to
<img file="MX336256B_D0081.tif" />
Remove the water from the cured hydrogel by extracting it under super critical conditions. As used herein, a super critical fluid (synonymous with super critical solution or super critical solvent) is one in which the temperature and pressure of the fluid are greater than the respective critical temperature and pressure of the fluids. A super critical condition for a particular fluid refers to a condition in which the temperature and pressure are both respectively higher than the critical temperature and critical pressure of the particular fluid.
An almost super critical fluid is one in which the reduced temperature (the current temperature measured in Kelvin divided by the critical temperature of the solution (or solvent) measured in Kelvin) and the reduced pressure (the current pressure divided by the critical pressure of the fluid) of the fluid are both greater than 0.8 but the fluid is not super fluid
<img file="MX336256B_D0082.tif" />
critical.
An almost super condition b /
z. · '
0jH. ? .. The criticism for a particular fluid refers to a condition in which the reduced tegg | ^ ature and the reduced pressure are both respectively :;
greater than 0.8 but the condition is not super critical. Under ambient conditions, the fluid can be a gas or a liquid.
The term fluid is also meant to include a mixture of or more different individual fluids. As used herein, the term super critical fluid and super critical conditions are intended to include near super critical fluids and near super critical conditions respectively.
The temperature and pressure of the process
<img file="MX336256B_D0083.tif" />
Extraction will depend on the choice of the super critical fluid.
Generally, the temperature is less than about 250 degrees Celsius and often less than about
100 degrees centigrade, while the pressure is around 50 atmospheres to around 500 atmospheres.
Solvents that can be used as super critical fluids are sometimes referred to as dense gases. Solvents suitable for use as super critical fluids include, for example, carbon dioxide, ethane, propane, butane, pentane, dimethyl ether, ethanol, water, and mixtures thereof. Carbon dioxide is a preferred super critical fluid for use in accordance with the present invention.
For example, at 333 Kelvin (K) and 150 atmospheres, the CO density<sub>2</sub>, is 0.60 grams per cubic centimeter; therefore with
<td></td><td></td><td rowspan="2">'. f-- z \ · '/ · * · <Ι. ··· .ι</td>
<td></td><td></td>
<td></td><td rowspan="2">í í</td><td>rf ) '·' Λ /</td>
<td></td><td></td>
<td><sup>80</sup></td><td>k L</td><td>and /</td>
<td>With respect to CO2, the reduced temperature is 1.09,</td><td>the</td><td>Pressure</td>
reduced is 2.06, and the reduced density is dgJW. Carbon dioxide is a particularly good choice of super critical fluid. Its super critical temperature (31.1 degrees 5 centigrade) is close to room temperature and therefore allows the use of moderate process temperatures (less than around 80 degrees centigrade). The time required for super critical drying will depend on the thickness of the gel.
In cases where the cured hydrogels are of a sufficiently high 40 percent density, as greater than about by weight (wt%) solids, the pore network may have an inherent strength sufficient for drying process without resorting to conditions of critics. Therefore, carbon dioxide can from the container under non-supercritical conditions.
super critical is particularly attractive because it withstands super drying being bleeding
Drying not at your reduced processing time. To maximize cross-linkage and further increase the density of the gels, the cured hydrogel can be cycled through.
After the solvent exchange / extraction step and any cure cycle, the organic airgel can be pyrolyzed at elevated temperatures of about 400 25 degrees Celsius to about 2,000 degrees Celsius in an inert atmosphere of nitrogen, argon, neon, helium or any combination of the above gases to form the
<img file="MX336256B_D0084.tif" />
pyrolyzed airgel, for example, a carbon airgel ;; Pyrolysis temperatures can alter the surface area and structure of the pyrolyzed airgel. In particular, the upper surface areas are achieved at lower temperatures. The resulting aerogels, independent of the process by which they are pyrolyzed, are black and not transparent due to the visible absorption properties of the carbon matrix.
*
<img file="MX336256B_D0085.tif" />
The aerogels of the present disclosure typically have a surface area of from about 400 square meters per gram to about 2,000 square meters per gram, a pore volume of about 0.5 cubic centimeters per gram to about 10 cubic centimeters per gram , and a density of about 0.01 grams per cubic centimeter to about 2.0 grams per cubic centimeter. Such properties can be easily determined by those skilled in the art. For example, the surface area and pore volume can be determined by the BET method (the Brunauer, Emmett, and Teller method) and the density can be determined by using a pycnometer.
Binders and / or fiber particles can be incorporated into the airgel to produce a mechanically stable airgel as described in United States Patent No. 6,887,563, which is incorporated herein by reference for all relevant purposes. and consistent. u & imív. . ·
<img file="MX336256B_D0086.tif" />
Aerogels can generally be used in a similar way to the use of hydrogels as described above. In particular, aerogels can possess the same skin adsorption and absorption properties and can include the same surfactants, the same adhesion modifiers and / or the same skin benefit agents described below.
Adhesion Modifiers
<img file="MX336256B_D0087.tif" />
In accordance with the present description, an adhesion modifier as described in the Application for
United States of America Patent Series No. 12 / 267,806 may suitably be included in the gel composition 121 / or in the perforated liner 123. The adhesion modifier may further enable the gel composition 121 and / or the liner 123 20 maintain its bond strength with the substrate, but remain smooth on the skin's surface. It should be understood that the adhesion modifier is optional and requires to be included in the absorbent article. The adhesion modifier can also behave as a delivery vehicle or carrier that can assist in the delivery of one or more skin benefit agents to said skin of a user. For example, in an embodiment, the modifier
<td>accession</td><td colspan="2">It's in</td><td>the</td><td>shape of a</td><td>matrix.</td><td>The modifier</td><td>of</td>
<td>accession</td><td>of</td><td>type</td><td>of</td><td>matrix can</td><td>include</td><td>(for example ^ L ^ /</td><td>to be</td>
<td>fill</td><td>with)</td><td>by</td><td>the</td><td colspan="2">minus one agent for</td><td>the benefit of</td><td>the</td>
skin as described below to function as a carrier for the agent for the benefit of the skin. The matrix containing the skin benefit agent can be dispersed within the gel composition.
Generally, matrix type are pore matrices. Specifically, the channel type modifiers or matrix is of type-formed matrix matrices in the modifiers to contain channels or pore into which agents for the benefit of the skin can be introduced. These types of adhesive modifiers serve a dual purpose of:
(1) modifying the adhesion of the absorbent gel and skin adhesive composition to the skin so that it can be efficiently adhered, but may be able to benefit from releasing a release of the skin from the skin without the damage to the skin; and controlled agents for the user's skin.
(2) the
It should be understood that even though numerous delivery vehicles are known in the art, all delivery vehicles or carriers are not suitable for use in the absorbent gel and skin adhesive compositions of the present disclosure. More particularly, the adhesion modifiers must be compatible with the
<img file="MX336256B_D0088.tif" />
gel composition to maintain flexibility and adhesive resistance of the composition without causing damage to the skin surface. .........
In one embodiment, the adhesion modifier (s) are added to the hydrogel precursor composition described above. During polymerization, the adhesion modifier is suspended within the gel composition.
Suitable adhesion modifiers include, for example, colloidal particles, cross-linked copolymers, and combinations thereof.
More particularly, the colloidal particles well suited for use in the present disclosure include microcrystalline cellulose, fumed silica, hydrated silica, and combinations thereof. Colloidal, commercially available such as smoked
Tuscola, Silica Particles Silica (available as Cab-o-sil M5 from Cabot Corporation of
Illinois, United States of
America) and mixtures of microcrystalline cellulose and cellulose gum (available as
AVICEL 591 of FMC Corporation of
Philadelphia, Pennsylvania,
United States of America) are particularly suitable for use as adhesion modifiers.
<img file="MX336256B_D0089.tif" />
In a particular embodiment, the adhesion modifier may include a matrix or polymer-like structure, such as cross-linked cross-polymers (eg, acrylate copolymers). The 5 cross linked polymers of acrylate crosslinked very
Λ
<img file="MX336256B_D0090.tif" />
Suitable for use in the present disclosure include the allyl methacrylate cross polymer, the allyl methacrylate / glycol dimethacrylate cross polymer, the lauryl methacrylate / glycol dimethacrylate cross polymer and derivatives thereof. Suitable examples include the POLYPORE E-200 adsorber, POLY-PORE L-200, POLYTRAP 7603 and POLYTRAP 6603 all of which are available from Amcol Health & Beauty Solutions (Arlington, Illinois, United States of America).
POLY-PORE and POLYTRAP ingredients can be loaded with skin benefit ingredients prior to inclusion in the skin-adhesive combination or are pre-loaded from Amcol Health & Beauty Solutions as POLYTRAP 6035 Cyclomethicone, Macro Dimethicone Beads POLYTRAP 7100, Petrolatum / Dimethicone Powder POLYTRAP 6500, 20 POLYTRAP 665TO (which is loaded with tocopherol) and Macro
Pearls of Mineral Oil POLYTRAP 6038.
In one embodiment, the skin-absorbent and adhesive composition includes from about 1 25 percent (by total composition weight) to about 50 percent (total composition weight) adhesion modifier '' · Λ. <. . ·. / and, in other incorporations, from about 2 percent (by total weight of the composition) to about 25 pt ^ Wento (by total weight of the composition) or from about 5 percent (by total weight of composition) to about 20 5 percent (by total composition weight) of the adhesion modifier.
Skin Benefit Agents
<img file="MX336256B_D0091.tif" />
In accordance with the present disclosure, skin benefit agents can suitably be included in gel composition 121, absorbent core 122 and / or perforated liner 123. A skin benefit agent generally provides a skin benefit (eg, functional, cosmetic, or health benefit) to the user / wearer. For example, a skin benefit agent such as an antiperspirant may be beneficial to the absorbent and skin adhesive gel composition as this will prevent the gel composition from weakening as a result of increased sweating. Specific areas of the body to be used with the adhesive composition to the skin.
Exemplary skin benefit agents may include, for example: antiperspirants, deodorants, moisturizers, humectants, pH modulators, smoothing agents,
<img file="MX336256B_D0092.tif" />
antimicrobials, condoms, film formers, and combinations thereof. Antiperspirant agents are those active ingredients generally found in antiperspirant products. In the Final Rule for antiperspirant drug products for human use sold over the counter; Final Monograph (Federal Register 68 34273-34293, June 9, 2003) a deodorant refers to a topically applied drug product that reduces the production of perspiration (sweating) at that site. See 21 CFR 350.3 for definition and 21 CFR 350.10 for a listing of deodorant active ingredients from the United States of America. The following are a list of ingredients currently listed in the Dictionary of International Nomenclature of Cosmetic Ingredients under this category: adipic acid / neopentyl glycol cross polymer, aluminum chloride, aluminum hydrochloride, PEG aluminum chlorohydrex, PG chlorohydrex aluminum, aluminum dichlorohydrate, PEG dichlorohydrex aluminum, PG dichlorohydrex aluminum, sesquichlorohydrate aluminum, sesquichlorohydrix aluminum PEG, PG sesquichloro aluminum (damped aluminum sulfate), aluminum zirconium octachlorohydrate, GLY octachlorohydrex zirconium aluminum, zirconium pentachlorohydrate, GLY pentachlorohydrex from. Zirconium Aluminum, Zirconium Aluminum Tetrachlorohydrate, GLY Zirconium Aluminum Tetrachlorohydrex, Zirconium Aluminum Trichlorohydrate, GLY Zirconium Aluminum Zircon, Bursera Graveolens Fruit Oil, Cone Extract Humulus lupulus (Hops) Branch / Flower extract of Hypericum perfo powder
<img file="MX336256B_D0093.tif" />
: _. Μ 9 /? '”-J' '' · ί zirconium and combinations thereof. Particularly preferred deo <^ ® ^ jit¿e for use in the skin-adhesive composition * of the present disclosure include the aluminum-zirconium complex REACH (AZP) 908, and REACH 103, both of which a hydrochloride which are commercially available from Reheis, Inc. of Berkeley Heights, New Jersey.
Deodorants are agents that reduce or eliminate unpleasant odors and protect against the formation of bad odor on body surfaces. Absorbents can act as deodorants and they have the ability to absorb stinky chemicals. Also, chemical reactions can be used to dest roy the stinky substance in selected cases. Perfumes and the like can be used to mask the perception of bad odor by a reodorization process. Unpleasant smells can also be the result of microbiological activity. Therefore, cosmetic biocides are frequently used ingredients in skin surface deodorants. The following list of deodorants is limited to those ingredients commonly used for this purpose: neopentyl glycol / adipic acid cross polymer, Alpinia Uraiensis leaf / stem water, aluminum chloride, aluminum chlorohydrate, aluminum chlorohydrex, PEG aluminum chlorohydrex, the chlorohydrex PG of
<img file="MX336256B_D0094.tif" />
aluminum, aluminum dichlorohydrate, aluminum PEG dichlorohydrex, aluminum PG dichlorohydrex, el - d ©;,.
aluminum, aluminum phenolsulfonate, aluminum sesquichlorohydrate, PEG aluminum sesquichlorohydrex,
PG sesquichlorohydrex aluminum, aluminum sulfate, aluminum triphosphate, aluminum zinc oxide, zirconium aluminum octachlorohydrate, GLY aluminum zirconium octa chlorohydrex, aluminum zirconium pentachlorohydrex GLY, tetrachloride Zirconium aluminum, GLY Zirconium aluminum tetrachlorohydrex, PEG Zirconium aluminum tetrachlorohydrex, PG Zirconium aluminum tetrachlorohydrex, aluminum zirconium trichlorohydrate, aluminum zirconium trichlorohydrex GLY, amber powder, ammonium phenosulfonate, silver ammonium zinc aluminum silicate, benzalkonium bromide, cetyl benzalkonium phosphate, benzalkonium chloride, benzalkonium saccharinate, benzethonium chloride, Boesenbergia Pandurata Rizome extract, bromochlorophen, t-butyl methylphenoxy phenol, calcium magnesium silicate, Callicarpa Macrophylla flower extract, Candida Bombicola / glucose / methyl coisa ferment, gold capriliol of amino pleasure acids, cetylpyridinium chloride, chlorophyllin-copper complex, chlorothymol, chloroxylenol, shell oil Citrus reticulata (mandarin), cloflucarban, colloidal platinum, Cuminum cyminum seed extract, Turmeric Heyneana root powder, cyclopentadecanone, chloride
7 · ί.Ζ Χ<sup>?</sup>'<sup>:</sup> |7''’7 <sub>ζ</sub>- Β dequalinium, dichlorophen, di-chloro-m-xylenol, cross polymer of PEG-15 / dimethicone, dipotassium caprylyl glutamate, gluj ^ tq; capryloyl disodium sulfosuccinilundecilenato dihydroxyethyl di sodium bromide domiphen, Ethylhexylglycerin, vegetable fermentation, hexachlorophene, extract Sasa hydrolyzate Veitchii, ketoglutaric acid, lauryl bromide isoquinolinium chloride laurylpyridinium carbonate / hydroxide / zinc / aluminum / magnesium water Menta water, chloride methylbenzethonium, methyl decilenate, Michelia Champaca flower oil, Hydrolyzed Fat Free Milk Ferment / Microco, octadecenedioic acid, oligopeptide-10, Pandanus amarilifolius leaf extract, Pelargonium graveolens water, phenol, Phyllostachys stem extract, Piper Betle leaf oil, polyaminopropyl biguanide stearate, potassium caprylyl glutamate, Rosmarinus officinalis (Rosemary) flower extract, juice ferment extract from fruit of saccharomyces / persimmon, filtered from Saccharomyces / Rhodobacter / Lactobacillus / Leuconostoc / Streptomyces / Griseus / Aspergillus / Ferm ento de Bacillus, Sasa Senanensis leaf extract, Sasa Senanensis Leaf Powder, Copper Silver Zeolite, Sodium Bicarbonate, Sodium Capryloyl Glutamate, Sodium Phenesulfonate, Sodium Silver Aluminum Silicate, Stemmacantha Carthamoides Root Extract, Totarol, Triclocarban, Triclosan, Tricyclodecenyl Propionate, Extract Urginea Maritima tuber, zeolite, zinc lactate, zinc phenosulfonate, zinc ricinoleate, zinc silicate and combinations thereof.
<img file="MX336256B_D0095.tif" />
Moisturizers are hygroscopic ^ ^ agents that are widely used as skin moisturizers. Its function is to prevent the loss of moisture from the skin and extract moisture from the environment. Common humectants include, for example, glycerin, butylene glycol, botain, sodium hyaluranate, and the like, and combinations thereof.
Relief agents, also mentioned as emollients, lubricants, soothe and smooth the surface of the skin. Exemplary emollients include oily or waxy ingredients such as esters, ethers, fatty alcohols, hydrocarbons, silicones, and the like, and combinations thereof.
Film formers, also referred to herein as skin barrier enhancers or occlusive materials, increase skin content by blocking the evaporation of water. These materials generally include lipids which tend to remain on the skin's surface or hydrocarbons such as petrolatum and wax.
Hydrology enhancers can help increase the melting point viscosity of the formulation so that the formulation easily remains on the surface of the substrate and / or laminate and does not migrate
X '· / essentially inside the substrate, while it does not affect the transfer of the formula ^ g ^^ - to the skin. Rheology improvers help the formulation ^ jdára · * · maintain high viscosity at elevated temperatures, such as those encountered during storage and transport. Additionally, rheology enhancers can influence the overall consistency and skin feel of the formulation.
Suitable rheology improvers include combinations of alpha-olefins and styrene alone or in combination with mineral oil or petrolatum, combinations of the di-functional α-olefins and styrene alone or in combination with mineral oil or petrolatum, combinations of alpha-olefins, and isobutene alone or in combination with mineral oil or petrolatum, ethylene / propylene / styrene copolymers alone or in combination with mineral oil or petrolatum, butylene / ethylene / styrene copolymers alone or in combination with mineral oil or petrolatum, ethylene / vinyl acetate copolymers, polyethylene polyisobutylenes, polyisobutenes, polyisobutylenes, dextrin palmitate, dextrin ethylhexanoate, stearoyl inulin, stearalkonium bentonite, distearadimonium hectorite and stearalkonium hectorite, styrene / butylene / styrene copolymers, styrene / isoprene / styrene copolymers, styrene copolymers-
<img file="MX336256B_D0096.tif" />
ethylene / butylene-styrene, the ethylene / propylene-styrene, the polymers, the (styrene-isoprene) copolymers
<img file="MX336256B_D0097.tif" />
(styrene <x-butadi ^ l ^ r-jv, nn polymers, styrene-butadiene copolymers, styrene / propylene copolymers and combinations thereof.
Specifically, rheology improvers such as mineral oil and ethylene / propylene / styrene copolymers, and mineral oil and butylene / ethylene / styrene copolymers (Versagel blends from Penreco) are particularly preferred.
Also, Vistanex (Exxon) and Presperse (Amoco) polymers are particularly suitable rheology improvers. Other suitable examples of oil soluble rheology improvers include, but are not limited to, aluminum aleatearate, aluminum triestearate, arachidyl alcohol, arachidyl behenate, behenyl alcohol, butyl dimethicone methacrylate / C-alkyl acrylate copolymer<sub>8</sub>-<sub>2</sub>2, C12-22 alkyl hydroxyethyl acrylate / acrylate copolymer, Cia-38 alkyl, C24-54 acid ester, C20-24 alkyl dimethicone, C30-60 alkyl dimethicone ceresin, cerotic acid, cetearyl alcohol, vinyl cross polymer dimethicone / cetearyl dimethicone, cetyl alcohol, cetyl glycol, dibehenyl fumarate, hydrogenated polyisobutene, hydrogenated oils, isocetyl alcohol, isocetyl stearyl stearate, pentaerythritol / isophthalic acid cross polymer benzoate / isostearate, isostearyl alcohol, isostearyl stearyl stearate, jojoba alcohol, lanolin alcohol, lanolin wax, neopentyl glycol dicaprate, neopentyl glycol diheptanoate, neoperftí4? ícZ <
<img file="MX336256B_D0098.tif" />
dicaprylate / dicaprate, dicaprylate / dipelargonate / dicaprate, diethylhexanoate, neopentylglycol ii.- neopentylglycol
<img file="MX336256B_D0099.tif" />
Glycol Diisostearate, Neopentyl Glycol Duraurate, Ozokerite, Palm Alcohol, Palm Kernel Alcohol, Paraffin, Pentaerythrityl Tetramyristate, Pentaerythrityl Tetraleate, Pentaerythrityl Tetrapelargonate, Pentaerythritil Tetraetea, Synthetic Canine, Synthetic Wax, Synthetic Wax vinyl dimethyl / trimethylsiloxysilicate, copolymer of
VP / eicosenne cross polymer of dimethicone stearyl and copolymer of VP / hexadecene. Water-soluble or water-dispersible rheology modifiers include, but are not limited to MEA acetamide, acrylate / ethallonium chloride / acrylamide copolymer, ethyl chloride / acrylamide acrylate copolymer, acrylamide copolymer, copolymer sodium acrylate / acrylamide, acrylates / acetoacetoxyethyl methacrylate copolymer, acrylates / beheneth-25 methacrylate copolymer, acrylates / C10-30 alkyl acrylate cross polymer, itaconate copolymer, ceteth-20 / acrylates, acrylates / ceteth-20 methacrylate copolymer, acrylates / laureth-25 methacrylate copolymer, acrylates / palmeth-25 acrylate copolymer, acrylates / palmeth25 copolymer, itaconate / copolymer 50 acrylate, acrylates / steareth-20 itaconate copolymer, acrylates / steareth-20 methacrylate copolymer, acrylates / copolymer
<img file="MX336256B_D0100.tif" />
stearic methacrylate, isodecanoate cross polymer, acrylate / vjuiyl acri neodecanoate cross polymer, acrylic acid / acrylonitrogen copolymer, agar, agarose, algin, alginic acid, vinyl formamide / acrylodimethyltaurate copolymer, ammonium copolymer, VP copolymer ammonium alginate, ammonium chloride, amylopectin, oatmeal pomegranate sativa, bentonite, calcium alginate, calcium carrageenan, alkyl stearate
C20-40 / carboxybutyl chitosan, carboxymethyl hydroxyethyl cellulose, carboxymethyl hydroxypropyl guar, cassia gum, cellulose gum, hydroxyethyl cellulose cetyl, C12-14 hydroxyalkyl, sarcosine hydroxyethyl, DEA cocamide, HDI decyl / PEG-180 cross-polymer, decyl isostearate, dextrin, dimethicone cross polymer / PEG-10 dimethicone cross polymer / PEG-15, methacrylate ethyltrimony chloride / dimethylacrylamide copolymer, disteareth-75 IPDI, disteareth100 IPDI, Gelatin, Gellan Gum, Hectorite, Hydrated Silica, Hydrolyzed Cellulose Gum, Methyl Cellulose Hydroxybutyl, Hydroxyethyl Cellulose, Hydroxyethyl Ethyl Cellulose, Hydroxypropyl Chitosan, Hydroxypropyl Methyl, Hydroxypropyl Methyl Cellulose, Hydroxypropyl Methyl Cellulose, Hydroxypropyl Methyl dimethicone, isopolyglyceri-3 dimethiconol, hydroxysultaine lauryl, lauryl / myristylglycol hydroxypropyl ether, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl
<img file="MX336256B_D0101.tif" />
Levan, Magnesium Alginate, Si Magnesium Silicate, PEG-22 Dodecyl Glycol / Methoxy Trisilicate, Methyl Cellulose, Methyl Hydroxyethyl Cellulose, Montmorillonite, Dimethicone, Magnesium, Methyl Ethyl Microcrystalline Copolymer, Hydroxysultaine, Octacosanyl Copolymer Diystearate, Tristearate IPDI, from PEG-10 / lauryl dimethicone, PEG-2M, PEG-23M, PEG-25M, 160M, 180M-PEG, methyl glucose tetraestearate, PEG / PPG-120/10 PEG / PPG-120/10 trimethylpropane sterearyl / copolymer SMDI, poly acrylate-11, poly polyester-5 acid, polyester-1, maleate / polyethylene, polyglyceryl-3 disiloxane polydimethylsiloxyethyl dimethicone, polyvinyl, modified polyacrylate, montmorillonite octamidopropyl glycol, copolymer of
PEG-150 / decile
PEG-190 betaine, octadecene / MA, alcohol / SMDI, distearate,
PEG-15
PEG-140 glyceryl triestearate, bis-decyltetradeceth-20 ether, PEG-180 / laureth-50 / TMMG copolymer, dimethicone, cross polymer
PEG-5M,
PEG-7M,
PEG-45M,
PEG-65M,
PEG-120 Methyl Glucose Trioleate, Poly Acrylate-3, Acrylic, Polyglycerol-20 Copolyol, Cellulose Licate, Cellulose Myristamidopropyl Isostearate Pectin, PEG-175 Glyceryl PEG-240 / HDI PEG-15 / PUR-Cross Polymer Polymer
PEG-9M, PEG-14MPEG- 20M,
PEG-90M, PEG-115M, PEGtriisoestearate, PEG-120
PEG-150 pentaerythrityl trimethylolpropane trioleate, PEG-150 trioleate / poly acrylate-10 alcohol, polycyclopentadiene,
MA / isopropyl polyglycerol-40, polyglyceryl-3-polyquaternium-dimethicone-86, potassium alcohol, potato starch PVP, copolymer of
<img file="MX336256B_D0102.tif" />
Sodium acrylonitrogens / acrylates, Sodium acrylates copolymer, Sodium acrylates cross polymer, Sodium acrylamidomethylpropane sulfonate / Sodium acrylate copolymer, Sodium acryloyldimethyl taurate / Sodium acrylate copolymer, Sodium acrylate vinyl isodecanoate / sodium acrylates, vinyl alcohol / sodium acrylate copolymer, VP / acrylamide / sodium acryloyldimethyl taurate copolymer, sodium beta-glucan carboxymethyl, sodium carboxymethyl starch, sodium carrageenan, sodium cellulose sulfate, sodium chloride, sodium hydroxypropyl starch phosphate, sodium isooctylene / MA copolymer, sodium polyacrylate, sodium starch octenylsuccinate, sodium sulfate Sodium, Steareth-100 / PEG-136 / HDI Copolymer, Tapioca Starch, TEA Alginate, TEA Carbomer, Hydroxypropyltrimonium Chloride Trehalose, Alcohol. tridecyl, undecyl alcohol, germidopropyl wheat betaine, xanthan gum, yeast, polysaccharides, and Zea Mays (corn) starch.
Still other optional components that may be desirable for use in the absorbent gel and skin adhesive composition include those cosmetic and pharmaceutical ingredients commonly employed in the health care industry. Examples include abrasives, absorbents, cosmetic components, (fragrances, pigments, dyes / colors), essential oils,
<img file="MX336256B_D0103.tif" />
*
<img file="MX336256B_D0104.tif" />
sensible for the skin, astringents (for example, clove oil, menthol, camphor, eucalyptus oil, eugeng ^<sub>r</sub>ja $ tilq lactate, hornbeam distillate), anti-acne agents, anti-hardening agents, anti-foam agents, antioxidants, binders, biological additives, buffering agents, bulking agents, chelating agents, chemical additives, dyes , cosmetic astringents, cosmetic biocides, denaturants, drug astringents, external pain relievers, opacifying agents, propellants, reducing agents, sequestrants, skin whitening and lightening agents (eg hydroquinone, kojic acid, ascorbic acid, ascorbyl magnesium phosphate, ascorbyl glucosamine), skin wetting agents, skin conditioning agents, skin relief and / or healing agents (eg panthenol and derivatives thereof, aloe vera, pantothenic acid and derivatives thereof, allantoin, bisabolol, potassium dihydrogen chloride, hemorrhoid treatment agents (eg hornbeam), prebiotics, probiotics, agents for treating urinary tract infection, agents for treating fungal infection, agents for treating bacterial vaginosis, agents for treating skin, sunscreens, thickeners, and vitamins and combinations thereof. Examples of these other agents are described in the Association of Fragrances, Toiletries and Cosmetics Manual of Cosmetic Ingredients, Twelfth Edition (2007) which is
<img file="MX336256B_D0105.tif" />
<img file="MX336256B_D0106.tif" />
incorporated herein by reference in the extension consistent with it.
that this in
<img file="MX336256B_D0107.tif" />
The amounts of optional components will depend on the type of absorbent gel and skin adhesive composition used there as well as the desired benefits of the optional components. In one embodiment, the gel composition includes from about 0.01 percent (by total weight of composition) to about 60 percent (by total weight of composition) of the agent for the benefit of the skin, and in another incorporation, from about 0.01 percent (by total weight of the composition) to about 30 percent (by total weight of the composition) of the agent for the benefit of the skin, and even from about 0.01 percent (by total composition weight) to about 20 percent (by total composition weight) of the skin benefit agent.
More than one skin benefit agent can be used depending on the desired effect or effects of the benefit agents.
The skin benefit agent can be homogeneously dispersed through the absorbent gel and skin adhesive composition or it can be located in discrete parts of the gel composition. For example, a skin benefit agent such as a moisturizer that
100
<img file="MX336256B_D0108.tif" />
It functions as a skin moistening agent. It may be located in the peripheral parts of the gel composition ^^ Pí ^ are most feasibly in contact with the skin.
In addition, additives related to vaginal ecology such as prebiotics, probiotics, pH balancing agents, urinary tract infection treatment agents, fungal infection treatment agents and treatment agents. bacterial vaginosis and additives such as hemorrhoid treatment agents may be located in the central parts of the cosmetic composition. Alternatively, or in addition, the skin benefit agent may be micro-etched or printed onto the surface of the gel composition. In some additions, the skin benefit agent is micro-encapsulated and dispersed through the gel composition.
Packing
Absorbent article 100 can be individually packaged to maintain the desired moisture content of the gel composition. For example, absorbent article 100 may be packaged in a hermetically sealed foil envelope similar to the packaging used for wet towels or wet-naps. Other packaging materials include polyester and aluminized polyester.
<img file="MX336256B_D0109.tif" />
101
The following description includes non-limiting specific adsorption article incorporations which further illustrate the present disclosure.
Examples
Example 1: Two Layer Absorbent Item
The absorbent article includes a substrate layer that can be a film, a nonwoven, a fabric, a net, or foam. An absorbent gel and skin adhesive composition is attached to the body facing surface of the substrate.
Example 2; A two-layer absorbent article with a contoured notch
The absorbent article is constructed according to Example 1; however, the absorbent gel and skin adhesive composition is shaped and sized to match the contours of the female genitalia.
102
LJl p— Particularly, the gel composition is generally in the form
<img file="MX336256B_D0110.tif" />
dome, for example, this one is thicker at its thinnest in the peripheral parts.
<img file="MX336256B_D0111.tif" />
Example 3: Two Layer Absorbent Article with Fibrous Tissue
The absorbent article includes a substrate, in Example 1. An absorbent gel and skin adhesive composition is bonded to the body-facing surface of the substrate. The gel composition includes a fibrous tissue with the threads of the tissue being covered by a hydrogel.
Example 4: Two Layer Absorbent Item with Two Layers of
Gel
The absorbent article substrate is comprised of a fluid impervious gel such as a fluid impervious silicone gel. A second gel composition that is skin adhesive and absorbent is attached to the body facing surface of the gel substrate. The substrate is thinner in the z-direction than the gel composition.
<img file="MX336256B_D0112.tif" />
103
Example 5: Three Layer Absorbent Article of l> \. ''<sub>Ί</sub> ,,. , íñ ^ u ^ iísr
The absorbent article includes a substrate as in Example 1. On the garment facing surface of the substrate is an absorbent core. The absorbent core may be composed of a hydrogel composition. A perforated liner made of hydrophobic silicone gel is attached to the surface side of the absorbent core body. The liner perforations may be in the form of openings, slots, funnels, or holes.
Example 6: Three Layer Absorbent Item Including Perforated Moisturizing Liner
The absorbent article includes a substrate and an absorbent core as in Example 5. The perforated liner of the absorbent article is a silicone gel that absorbs and pulls menstrual fluid but maintains hydration of the skin that contacts the liner. The perforated liner is sized and shaped to contact the wearer's lip region.
Example 7: Three Layer Absorbent Item Including Skin Benefit Agents
The absorbent article of Example 5 includes skin benefit agents. Particularly the part
Φ
104 core absorbent core includes
Probiotic lilies and pH balancing agents for ecology vagii ^. ^, ^ As peripheral parts of the absorbent core include a humectant to prevent skin irritation.
Example 8: Four Layer Absorbent Item
The absorbent article includes a layer of the substrate as in Example 1 attached to the body facing surface of the substrate is an absorbent core containing an absorbent gel. Attached to the body-facing surface of the absorbent core is fibrous tissue that is coated with a hydrogel that provides dimensional elasticity (in the x, y, and z directions to prevent collapse of the absorbent article and loss of fluid capacity. A perforated liner made of hydrophobic silicone gel is attached to the body-facing surface of the fibrous tissue. The perforated lining is comfortable for the wearer, for example, in that it does not irritate the skin and is malleable.
Having described the description in detail, it will be evident that modifications and variations are possible without departing from the scope of the description defined in the following clauses.
105
In view of the above,
<img file="MX336256B_D0113.tif" />
and ii it will be seen what various objects of the description are achieved and are obtained.
How can several be done
<img file="MX336256B_D0114.tif" />
Changes in the previous formulations and substrates / articles without departing from the scope of the description, it is intended that all the matter contained in the previous description should be interpreted as illustrative and not in a limiting sense.
<img file="MX336256B_D0115.tif" />
r
<img file="MX336256B_D0116.tif" />
106
Contents21
121 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Sheet 12 Sheet 13 Sheet 14 Sheet 15 Sheet 16 Sheet 17 Sheet 18 Sheet 19 Sheet 20 Sheet 21 Sheet 22 Sheet 23 Sheet 24 Sheet 25 Sheet 26 Sheet 27 Sheet 28 Sheet 29 Sheet 30 Sheet 31 Sheet 32 Sheet 33 Sheet 34 Sheet 35 Sheet 36 Sheet 37 Sheet 38 Sheet 39 Sheet 40 Sheet 41 Sheet 42 Sheet 43 Sheet 44 Sheet 45 Sheet 46 Sheet 47 Sheet 48 Sheet 49 Sheet 50 Sheet 51 Sheet 52 Sheet 53 Sheet 54 Sheet 55 Sheet 56 Sheet 57 Sheet 58 Sheet 59 Sheet 60 Sheet 61 Sheet 62 Sheet 63 Sheet 64 Sheet 65 Sheet 66 Sheet 67 Sheet 68 Sheet 69 Sheet 70 Sheet 71 Sheet 72 Sheet 73 Sheet 74 Sheet 75 Sheet 76 Sheet 77 Sheet 78 Sheet 79 Sheet 80 Sheet 81 Sheet 82 Sheet 83 Sheet 84 Sheet 85 Sheet 86 Sheet 87 Sheet 88 Sheet 89 Sheet 90 Sheet 91 Sheet 92 Sheet 93 Sheet 94 Sheet 95 Sheet 96 Sheet 97 Sheet 98 Sheet 99 Sheet 100 Sheet 101 Sheet 102 Sheet 103 Sheet 104 Sheet 105 Sheet 106 Sheet 107 Sheet 108 Sheet 109 Sheet 110 Sheet 111 Sheet 112 Sheet 113 Sheet 114 Sheet 115 Sheet 116 Sheet 117 Sheet 118 Sheet 119 Sheet 120 Sheet 121
23 members in 10 offices
Priority claims9
| Document | Office | Kind | Date |
|---|---|---|---|
| 12364365 | United States of America | – | |
| 36436509 | United States of America | A | |
| 36436509 | United States of America | A | |
| 2010050416 | International Bureau of the World Intellectual Property Organization (WIPO) | W | |
| 2010050416 | International Bureau of the World Intellectual Property Organization (WIPO) | W | |
| 12364365 | – | – | – |
| IB1050416 | – | – | – |
| US20090364365 | – | – | – |
| WO2010IB50416 | – | – | – |
Members23
| Document | Office | Kind | |
|---|---|---|---|
| US2010198177A1 | United States of America | A1 | |
| WO2010086829A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2010086829A3 | World Intellectual Property Organization (WIPO) | A3 | |
| MX2011008100A | Mexico | A | |
| AU2010209325A1 | Australia | A1 | |
| KR20110118651A | Republic of Korea | A | |
| EP2391325A2 | European Patent Office (EPO) | A2 | |
| CN102300537A | China | A | |
| CO6400180A2 | Colombia | A2 | |
| RU2011136300A | Russian Federation | A | |
| EP2391325A4 | European Patent Office (EPO) | A4 | |
| CN102300537B | China | B | |
| AU2010209325B2 | Australia | B2 | |
| RU2559126C2 | Russian Federation | C2 | |
| MX336256BThis record | Mexico | B | |
| BRPI1005421A2 | Brazil | A2 | |
| KR101696495B1 | Republic of Korea | B1 | |
| MX349977B | Mexico | B | |
| EP2391325B1 | European Patent Office (EPO) | B1 | |
| US10022468B2 | United States of America | B2 | |
| US2018289853A1 | United States of America | A1 | |
| BRPI1005421B1 | Brazil | B1 | |
| US11285239B2 | United States of America | B2 |
Numbers
- Publication
- 336256
- Publication, DOCDB
- 336256
- Publication, EPODOC
- MX336256
- Application
- 2011008100
- Application, DOCDB
- 2011008100
- Application, EPODOC
- MX20110008100
Titles
- Spanish
- ARTICULOS ABSORBENTES CONTENIENDO UN GEL MULTIFUNCIONAL.
Classification
- CPC, 7
- A61F13/82
- A61L15/58
- A61F2013/530481
- A61L15/60
- A61F13/58
- A61F2013/15569
- A61F2013/530737
- IPC, 4
- A61F13 511
- A61F13 53
- A61F13 58
- A61L15 60