Absorbent article with central pledget and deformation control as well as the method for producing the same
Abstract
An absorbent article is disposed having excellent body fit,center-fill fluid handling performance, and good leakage controlin that flow from the center of the article to the longitudinalsides thereof is hindered by a wicking barrier. The articlecomprises a lower absorbent member, an horizontal wickingbarrier over the lower absorbent member, and a centralabsorbent section forming a medial hump over the horizontalwicking barrier. An optional central rising member can furtherenhance the topography of the article when compressed byurging a central portion to deflect vertically upward. In oneembodiment, longitudinal upward projections on the horizontalwicking barrier also help control the deformation of the articlefor good body fit.
Term
No projected expiry on record.
- Priority
- Filed
- Granted
- Today
61 claims: 35 independent, 26 dependent
- 1一種用於穿著者身體的吸收性物件,其包含一縱向中央線、一橫向中央線、兩個縱向側邊、一目標區以及一身體一側側邊,其中的吸收性物件包含:a)一流體不可穿透底層;b)一連結於底層的流體可穿透表層;c)一置於底層之上的下部吸收構件,其中的下部吸收構件包含一對位於目標區的相隔縱向皺摺線,其與物件的縱向中央線位於不同的側邊,而且這一對皺摺線彼此保持一定的距離;d)一水平吸收阻擋物,其位於下部吸收構件上方;e)一中央吸收構件,其側邊寬度小於目標區皺摺線間距離,而中央吸收構件則置於水平吸收阻擋物上方;以及f)一上部吸收構件,其在目標區的縱向側邊和寬度大於中央吸收構件的寬度,但是小於水平吸收阻擋物的寬度,而上部吸收構件的位置在中央吸收構件上方和表層的下方。
- 2如申請專利範圍第1項所述的吸收性物件,其中上部吸收構件在目標區的寬度不超過下部吸收構件中皺摺線之間的距離。
- 3如申請專利範圍第1項所述的吸收性物件,其中上部吸收構件的皺摺線與下部吸收構件的皺摺線有部分重疊。
- 4如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的厚度約為2公釐或更大,目標區的寬度介於20公釐到40公釐之間,而長度則介於25公釐到70公釐之間。
- 5如申請專利範圍第1項所述的吸收性物件,其中皺摺線為壓印所形成。
- 6如申請專利範圍第1項所述的吸收性物件,其中皺摺線為標記所在。
- 7如申請專利範圍第1項所述的吸收性物件,其中皺摺線可以是切口、細縫、穿洞以及V型刻痕。
- 8如申請專利範圍第1項所述的吸收性物件,其中皺摺線延著縱向延伸約30公釐或更長的距離。
- 9如申請專利範圍第1項所述的吸收性物件,其中上部吸收構件的縱向長度大於中央吸收構件的長度。
- 10如申請專利範圍第1項所述的吸收性物件,其另外包含一中央突起構件。
- 11如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含一中央突起構件。
- 12如申請專利範圍第1項所述的吸收性物件,其中中央突起構件包含一吸收性織物。
- 13如申請專利範圍第1項所述的吸收性物件,其中中央突起構件在側邊擠壓之前的厚度約為5公釐或更小。
- 14如申請專利範圍第1項所述的吸收性物件,其中目標區的水平吸收阻擋物大致沿著吸收性物件的周邊延伸。
- 15如申請專利範圍第1項所述的吸收性物件,其中水平吸收阻擋物覆蓋住所有未被上部吸收構件所覆蓋的下部吸收構件部分。
- 16如申請專利範圍第1項所述的吸收性物件,其中水平吸收阻擋物包含上部吸收構件所覆蓋區域的縫隙。
- 17如申請專利範圍第1項所述的吸收性物件,其中吸收阻擋物的材質是流體不可穿透的。
- 18如申請專利範圍第1項所述的吸收性物件,其中吸收阻擋物的材質是流體可穿透的。
- 19如申請專利範圍第1項所述的吸收性物件,其中吸收阻擋物為一聚合膠膜。
- 20如申請專利範圍第1項所述的吸收性物件,其中吸收阻擋物可以是一紡粘織物以及熔吹織物。
- 21如申請專利範圍第1項所述的吸收性物件,其中吸收阻擋物包含一具有疏水劑的纖維素織物。
- 22如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含一折疊織物,其厚度至少為三層織物的厚度。
- 23如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含一折疊的彈性材料區,其切面大致呈”e”字型。
- 24如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含一彈性材料區,其大致呈扁平管狀。
- 25如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的吸收能力約為3毫升的流體或是更多。
- 26如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的吸收能力約為10毫升的流體或是更多。
- 27如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含一纖維織物,其可以是氣流鋪置纖維素織物以及絨毛紙漿墊。
- 28如申請專利範圍第1項所述的吸收性物件,其中下部吸收構件的厚度小於中央吸收構件的厚度。
- 29如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的厚度在潤濕之後會增加。
- 30如申請專利範圍第1項所述的吸收性物件,其中水平吸收阻擋物與底層為一體成形的。
- 31如申請專利範圍第1項所述的吸收性物件,其中底層包覆下部吸收構件的側邊,至少形成一部份的水平吸收阻擋物。
- 32如申請專利範圍第1項所述的吸收性物件,其中水平吸收阻擋物包含數個織物或是膠膜。
- 33一種吸收性物件,其包含一目標區、一縱向方向、一橫向方向、一垂直於縱向方向和橫向方向的垂直方向,以及一身體一側側邊,其中的吸收性物件包含:a)一流體不可穿透表層;b)一下部吸收構件,其位於底層之上;c)一水平吸收阻擋物,其置於下部吸收構件之上,而且其中吸收阻擋物的寬位於目標區;d)一中央吸收構件,其位於吸收阻擋物之上,而且最大的寬位於目標區;e)一上部吸收構件,其位於中央吸收構件上,而且位於目標區的寬度不小於中央吸收構件在目標區的最大寬度,其中上部吸收構件的設計使其在吸收性物件側邊朝內擠壓時朝上彎曲;f)一連結於底層的表層。
- 34如申請專利範圍第32項所述的吸收性物件,其中下部吸收構件包含一對沿著縱向方向延伸的相隔皺摺線。
- 35如申請專利範圍第1項所述的吸收性物件,其中水平吸收阻擋物包含一對彼此相隔的縱向朝上突出物,其間的距離等於或是大於上部吸收構件位於目標區的寬度,而且縱向朝上突出物可調整,使其在物件側邊朝目標區擠壓時,咬合上部吸收構件的縱向側邊。
- 36如申請專利範圍第34項所述的吸收性物件,其中下部吸收構件沿著橫向中央線分隔成兩個相隔的區域。
- 37如申請專利範圍第1項所述的吸收性物件,其中下部吸收構件在目標區是連續成形的。
- 38如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含以熱熔塑膠材料強化的纖維素纖維。
- 39如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件包含的纖維素纖維濕:乾張力強度比率至少為0.1。
- 40如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的潤濕體積約為6cc/g或更大。
- 41如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件的潤濕體積約為10cc/g或更大。
- 42如申請專利範圍第1項所述的吸收性物件,其中上部吸收構件另外包含一泡沫、泡沫-纖維合成物以及一泡沫-結構纖維吸收性材料。
- 43如申請專利範圍第1項所述的吸收性物件,其另外包含自由流動吸收材料。
- 44如申請專利範圍第1項所述的吸收性物件,其另外包含至少一空介面、微介面、微多孔或是吸收介面。
- 45如申請專利範圍第1項所述的吸收性物件,其中中央吸收構件另外包含纖維顆粒。
- 46如申請專利範圍第1項所述的吸收性物件,其中下部吸收構件具有中央空間。
- 47一種具有目標區的吸收性物件,其包含:a)一流體不可穿透底層;b)一下部吸收構件,其位於底層之上;c)一水平吸收阻擋物,其位於下部吸收構件之上,而且其中吸收阻擋物的寬位於目標區;d)一事先塑型上部吸收構件,其位於水平吸收阻擋物之上,而且形成一中央突起以及水平吸收阻擋物和中央突起之間的空間,其中事先塑型的上部吸收構件位於目標區的寬度不大於水平吸收阻擋物在目標區的寬度;以及e)一表層,其位於事先塑型上不吸收構件之上,並且連結於底層。
- 48如申請專利範圍第47項所述的吸收性物件,其另外包含一位於空間內的中央吸收構件。
- 49如申請專利範圍第47項所述的吸收性物件,其中事先塑型上部吸收構件包含一包含熱熔塑膠連結纖維的氣流鋪置纖維素織物,同時透過氣流鋪置織物的熱熔塑型形成中央突起。
- 50如申請專利範圍第47項所述的吸收性物件,其另外包含一位於上部吸收構件和水平吸收阻擋物之間的中央吸收構件。
- 51如申請專利範圍第49項所述的吸收性物件,其中中央吸收構件包含纖維顆粒。
- 52如申請專利範圍第47項所述的吸收性物件,其中事先塑型上部吸收構件包含一泡沫。
- 53如申請專利範圍第1或47項所述的吸收性物件,其中上部吸收構件和下部吸收構件的設計使其在吸收性物件中央區側邊朝內擠壓時會朝上彎曲。
- 54一種製造吸收性物件的方法,其中的吸收性物件包含一縱向中央線以及一垂直於縱向中央線的橫向中央線,此方法包括:a)形成一底層;b)將一平面下部吸收構件置於底層之上,其中的下部吸收構件包含沿著物件橫向中央線的寬度以及縱向皺摺線;c)將一水平吸收阻擋物置於下部吸收構件之上;d)將一中央吸收構件置於水平吸收阻擋物之上,其中的中央吸收構件大致位於物件縱向中央線中央,而且其寬度小於下部吸收構件沿著物件橫向中央線的寬度;e)將一上部吸收構件置於中央吸收構件之上,其中的上部吸收構件沿著物件橫向中央線的寬度大於中央吸收構件的寬度;f)將一表層置於上部吸收構件和下部吸收構件之上;以及g)將表層固定於底層。
- 55如申請專利範圍第54項的方法,其中水平吸收阻擋物可覆蓋住下部吸收構件。
- 56如申請專利範圍第54項的方法,其另外包括在水平吸收阻擋物上形成細縫。
- 57一種製造具有目標區吸收性物件的方法,其包括:a)形成一流體不可穿透底層;b)將一下部吸收構件至於底層之上;c)將一水平吸收阻擋物至於下部吸收構件之上,其中吸收阻擋物的寬位於間標區內;d)將一上部吸收構件事先塑型,形成具有中央突起的事先塑型上部吸收構件,使得事先塑型上部吸收構件至於平坦表面,而中央突起遠離平坦表面時,在中央突起之內形成一空間;e)將事先塑型上部吸收構件置於水平吸收阻擋物之上,使得中央突起遠離水平吸收阻擋物;f)將表層置於事先塑型上部吸收構件之上;以及g)將表層與底層連結。
- 58如申請專利範圍第57項所述的方法,其另外包含將中央吸收構件置於水平吸收阻擋物和事先塑型上部吸收構件之間。
- 59如申請專利範圍第57項所述的方法,其中事先塑型上部吸收構件的事先塑型步驟可以是壓印、熱壓印以及蓋印等過程。
- 60如申請專利範圍第57項所述的方法,其中事先塑型上部吸收構件的事先塑型步驟可以是將氣流鋪置之物置於一塑型表面上進行。
- 61如申請專利範圍第57項所述的方法,其中事先塑型上部吸收構件的事先塑型步驟可以是將一泡沫、泡沫-纖維合成物以及一泡沫-結構纖維吸收材料加以塑型。
Independent claims61
226 paragraphs, as filed
Absorbent article with central press cloth and deformation control and manufacturing method thereof
<p>10. . . article object</p><p>12. . . topsheet</p><p>14. . . backsheet bottom layer</p><p>15. . . absorbent core</p><p>16. . . central absorbent section</p><p>18. . . upper absorbent member upper absorbent member</p><p>20. . . middle absorbent member</p><p>twenty two. . . lower absorbent member</p><p>twenty four. . . wicking barrier</p><p>28. . . crease line</p><p>29. . . longitudinal centerline longitudinal centerline</p><p>30. . . medial hump central protrusion</p><p>34. . . ledge</p><p>36. . . apertures</p><p>38. . . outer absorbent region</p><p>40. . . inner absorbent region</p><p>48. . . crotch region bifurcation</p><p>50. . . central rising member</p><p>52'. . . longitudinal sides</p><p>52"...longitudinal sides</p><p>54. . . upper portion</p><p>56. . . first lower portion first lower portion</p><p>58. . . second lower portion second lower portion</p><p>60. . . end</p><p>62. . . end</p><p>64. . . overlapping region</p><p>70. . . adhesive stripes</p><p>72. . . shaping line shaping line</p><p>74. . . central longitudinal line</p><p>76. . . spanning line</p><p>78. . . longitudinal sides</p><p>80. . . crease line</p><p>82. . . central hinge</p><p>84. . . arrow arrow</p><p>86. . . arrow arrow</p><p>88. . . resilient web resilient web</p><p>90. . . end</p><p>92. . . underlying web</p><p>94. . . bond area</p><p>96. . . central portion</p><p>98. . . distance</p><p>100. . . semi-elliptical holes</p><p>102. . . slot</p><p>110. . . pockets</p><p>112. . . pockets</p><p>114. . . pockets</p><p>116. . . projection</p><p>118. . . longitudinal end</p><p>122. . . void space</p>
Figure 1 shows a top view of the currently invented sanitary napkin.
Figure 2 shows a cross section of the sanitary napkin in Figure 1.
Figure 3 shows that the central protruding member has a structure folded into an e.
Figure 4 shows the central protruding member at various stages of side compression.
Figure 5 shows a sanitary napkin with a central protruding member in the central absorbent area.
Figure 6 shows a top view of an absorbent article with bending lines in the upper absorbent member.
Figures 7A and 7B show two forms of the central protruding member.
Figures 8A to 8C show the arrangement of various holes in the horizontal absorption barrier.
Figure 9 shows the various shapes of the central absorbent member.
Figure 10 shows a cutaway view of the central protrusion formed by the intermediate absorbent member of the sanitary napkin on the horizontal absorbent barrier.
Figure 11 shows a cross section of the intermediate absorbent member, with the absorbent material divided into three longitudinally extending pockets.
Figure 12 shows a transverse cross-section of the absorbent article. The horizontal absorbent barrier includes longitudinal upward protrusions near the longitudinal sides of the horizontal absorbent barrier.
Figures 13A to 13C show longitudinal cross-sections of three different systems of absorbent articles with central absorbent members.
Background of the invention
To prevent body exudates from leaking from absorbent articles such as feminine care pads or sanitary napkins and disposable diapers, the exudates should preferably not extend to the edges of the absorbent material in the article. Ideally, a "central filling" strategy is used to prevent leakage, and the fluid should preferably be restricted to the central area of the object. Unfortunately, in traditional absorbent articles, generally speaking, there is no barrier for volumetric fluid or capillary absorption from the target area (fluid inlet) to the edge of the article, so leakage from the edge of the article is continuous problem. Therefore, in traditional objects, fluid entering the center of the object may still penetrate through the absorbent material and directly reach the side and leak out. The fluid from the center to the side of the object will be compressed very quickly, so that the wet central part of the object comes into contact with the absorbent material on the side of the object.
The ability of absorbent objects to improve central filling and reduce leakage depends on the good fit of the object in use. In sanitary napkins and other absorbent articles, the wearing article is often compressed by the side of the wearer's legs, causing serious deformation of the article. In many traditional objects, deformation is random and uncontrolled, resulting in diversification of product shapes, good absorption of objects and fluid distribution are often inappropriate.
In the past, efforts to improve the fit and enhance fluid absorption in the center of the object included a three-dimensional structure with a central protrusion or a protruding central member placed above the flat absorption center. For example, the protruding member may be a cylinder or a U-shaped tube. However, an object with a centrally protruding member may still be subject to leakage or contamination caused by fluid leaving the side of the member. In addition, the deformation of the entire object may not be well controlled, even if its central protruding area still leads to poor fit in many cases.
An absorbent article with its internal barrier prevents leakage at the side and provides good deformation control of the absorbent material, which is necessary when wearing the absorbent material and placing it close to body exudates. Through the effective use of a small amount of absorbent material to reduce leakage and provide a good fit while maintaining comfort, a thin absorbent article with good central filling performance is even more necessary.
Introduction to the invention
If following some specific design principles to strengthen the central part of the absorption center to lean towards the wearers body, it has been found that the multi-layer absorption center and the horizontal absorption barrier between two superimposed layers can be used to enhance leakage prevention, which is better Fit, and core absorbent materials are used more effectively. According to the design principle, the absorption center is divided into two parts, a lower absorption member and a central absorption area. The two parts are separated by a horizontal absorption barrier to reduce the penetration of fluid from the central target area of the object to the longitudinal side of the object. possibility.
Therefore, on the one hand, in the invention of an absorbent article used on the wearer's body, the absorbent article with a longitudinal centerline, a transverse centerline, two longitudinal sides, a day mark area and a body side includes:
a) a fluid-impermeable bottom layer; b) a fluid-permeable surface layer attached to the bottom layer; c) a lower absorbent member placed above the bottom layer. Open longitudinal crepe lines, the pair of longitudinal crepe lines are spaced apart; d) a horizontal absorption barrier placed above the lower absorbent member; e) an intermediate absorbent member with a width smaller than the distance between the crepe lines in the target area, and the intermediate absorbent member is placed Above the horizontal absorbent barrier; and f) the upper absorbent member in a target zone has longitudinal sides and a width greater than the width of the middle absorbent member but less than the width of the horizontal absorbent barrier, placed above the middle absorbent member and below the surface layer .
On the other hand, in the invention of an absorbent article with a target area, the absorbent article includes:
a) a fluid-impermeable bottom layer; b) a lower absorbent member placed above the bottom layer; c) a horizontal absorbent barrier placed above the lower absorbent member, the horizontal absorbent barrier having a width in the target area; d) one placed The middle absorbent member above the absorbent barrier has a maximum width in the target area; e) an upper absorbent member placed above the middle absorbent member has a width not less than the maximum width of the middle absorbent member in the target area in the target area, When the absorbent article is compressed to the inner side, the upper absorbent member is pre-positioned and inclined upward; and f) a surface layer connected to the bottom layer.
On the other hand, an absorbent article with a target area, a longitudinal direction, a lateral direction, a direction perpendicular to the longitudinal direction and the lateral direction, and a side of the body is invented. This absorbent article includes:
a) a fluid-impermeable bottom layer; b) a lower absorbent member placed above the bottom layer; c) a horizontal absorbent barrier placed above the lower absorbent member, the horizontal absorbent barrier has a width in the target area; d) one placed A pre-shaped upper absorption member above the horizontal absorption barrier. The pre-shaped upper absorption member is shaped to define a middle protrusion and a gap between the horizontal absorption barrier and the middle protrusion. This pre-shaped upper absorption The component has a width in the target area, which is not greater than the width of the horizontal absorption barrier in the target area; and e) is placed above the pre-shaped upper absorbing component and attached to the surface layer of the bottom layer.
The voids of the above-mentioned objects are optional, but it is preferable to fill a part of it with an intermediate absorbent member, including loose fibrous materials, such as hardwood fiber particles, absorbent particles, high-volume fluff wood pulp, fabric layers, and The same thing. Generally speaking, the pre-shaped upper absorbing member is placed in advance and bends upward when the side is compressed inward.
On the other hand, the inventive method of manufacturing an absorbent article having a longitudinal centerline and a transverse centerline perpendicular to the longitudinal centerline includes:
a) Provide a bottom layer; b) Place a flat lower absorbent member above the surface layer. The lower absorbent member has a width along the transverse center line of the object and includes longitudinal crease lines; c) Place a horizontal absorbent barrier above the lower absorbent member; d ) Place the middle absorbent member above the horizontal absorbent barrier, the middle absorbent member is located in the middle of the longitudinal centerline of the object, and has a width smaller than the width of the lower absorbent member along the transverse centerline of the object; e) Place the upper absorbent member above the middle absorbent member, The upper absorbent member has a width larger than the width of the middle absorbent member along the transverse center line of the object; f) placing the surface layer above the upper absorbent member and the lower absorbent member; g) locking the surface layer and the bottom layer.
On the other hand, the inventive method of manufacturing an absorbent article with a target area includes:
a) Provide a fluid-impermeable bottom layer; b) Place the lower absorbent member above the bottom layer; c) Place a horizontal absorbent barrier above the lower absorbent member, which has a width in the target area; d) Pre-shape the upper absorbent member To form a pre-shaped upper absorbent member with a central protrusion, so that when the pre-shaped upper absorbent member is placed on a plane and the central protrusion is released from the plane, a gap is formed under the central protrusion; e) Place The pre-shaped upper absorption member is above the horizontal absorption barrier, and the protrusions leave the horizontal absorption barrier; and f) the surface layer is placed on the pre-shaped upper absorption member; g) the surface layer is attached to the bottom layer.
The core absorbent member can be fluff wood pulp, airlaid nets, multi-layer fabric layers, conformal, absorbent foams, and the like. The central absorption zone of the absorption center is located above the horizontal absorption barrier and comprises at least two layers, one is a middle absorption member preferably located in the center of the absorbent article, and an upper absorption member which is wider than the middle absorption member. Preferably, the middle absorbent member is thicker than the upper absorbent member. The upper absorbent member at least partially conforms to the shape of the smaller intermediate absorbent member, so that a central protrusion is formed in the absorbent center to improve the fit.
Preferably, the lower absorbent member can be shaped to control the deformation and fit of the pad, and if the central absorbent area cannot hold all the fluid absorbed, it can provide additional absorbent capacity. The lower absorbent member may be a separate adjacent piece, or it may contain a variety of discrete regions or layers. The lower absorbent member can provide a common gap below the horizontal absorbent barrier to reduce the amount of material in the absorbent article, because the central area of the lower absorbent member may not need to hold fluid.
When the side edges are compressed inward during wearing, the undulations of the absorbent article are further strengthened in the target area, resulting in the protrusion of the W-shaped object in the target area. Crepe lines, such as embossments or slits in the lower absorbent member and/or upper absorbent member, greatly strengthen the longitudinal notched creases in the absorbent center outside the longitudinal centerline. The crepe line helps to absorb the required deformation of the outer part of the center for a good fit, while the CCP protrusions and other central members help to absorb the upward inclination of the center and improve the fit. Therefore, a positive interaction between the central protrusion and the crease line in the absorption center can improve a good fit.
In addition to the crease line to strengthen the downward crease of the object, when the object is compressed by the side of the longitudinal side of the object, the setting line can also promote the upward crease (such as a convex crease). If there is a shaping line, it should be located in the central absorption zone of the object. A shaping line near the longitudinal center line and two crease lines divided from the longitudinal center line can form a W-shaped geometric crease in the object when the side edges are compressed.
The entire absorption center is preferably soft and elastic to fit the body, and deform the components to bend toward the body when the article is worn.
In a better combination, the good fit and leakage control capabilities of the present invention are partly inclined upward from the entire absorption center of the central part of the target area, which means that both the lower absorbent member and the upper absorbent member are inclined to the body , Instead of the upper absorbent member tilting toward the body alone, or other members above the absorption center tilting toward the body, the lower absorbent member does not tilt toward the body.
The horizontal absorption barrier plays an important role in improving the central filling of the fluid and preventing leakage. The horizontal absorption barrier is outside the range of the upper absorption member and has a horizontal distance on the surface of the lower absorption member (even if it is not placed on a separate horizontal surface), especially in the target area. Therefore, the horizontal absorption barrier in the target area is wider than the middle absorption member and the upper absorption member to prevent the transmission of absorption between the central absorption area and the lower absorption member.
The part of the horizontal absorption barrier located on the surface of the lower absorption member and outside the range of the upper absorption member is called "long and narrow protrusion" or "exposed part of the horizontal absorption barrier". Even when the object is compressed by the side, the elongated protrusion helps prevent the transmission of absorption between the central absorption area and the adjacent lower absorption member. It can also guide the fluid to the central absorption zone to enhance the central filling effect. When the fluid is placed on the elongated protrusion, the fluid can be directed to the central absorption zone instead of flowing into the lower absorption member underneath. In a related combination, the elongated protrusions can cover all the side surfaces of the body in the lower absorbent member outside the central absorbent area. Therefore, even under extreme constraints in the use of the object, the elongated protrusion can separate the absorption effect of the central absorption area from the lower absorption member.
The horizontal absorption barrier is preferably a thin and elastic net or film, which does not absorb fluid, or at least absorbs fluid more slowly than the core absorbent material. The horizontal absorption barrier is preferably a waterproof polyolefin film or net, such as a polyethylene film or meltblown net. In a better combination, the absorption barrier is fluid-impermeable, except for the selective holes that allow a certain amount of fluid to flow from the central absorption area to the lower part of the lower absorption member. Secondly, the absorption barrier contains part of the waterproof material. , Used to soak or cover the lower absorbent member, provide an impermeable area in the lower absorbent member to reduce side absorption. The waterproof material may include adhesives, especially hot-melt adhesives added to the absorbent article when casting; wax; silicon compound material; and polyolefin and the like.
The horizontal absorption barrier can be a smooth film with relatively low friction. When the object is compressed by the side, the middle absorption member can partially flow or move to the horizontal absorption barrier to promote fit.
A good fit can be further achieved by a central protruding member placed in or below the absorbent center. The central protruding member, as detailed below, slopes upward when the longitudinal sides of the object are compressed by the side edges. As a result of the inclination of the central protruding member, the upper absorbent member then inclines toward the wearer's body.
The optional central protruding member can have a variety of structures, which incline upward when the longitudinal sides are compressed by the side edges. It includes an absorbent net folded into an e-shape before being flattened, and its central line is aligned with the longitudinal center of the object ( The e-shaped flat horizontal bar is located horizontally, perpendicular to the longitudinal collinear line of the object). When compressed by the side edges of the longitudinal sides of the object, the flat e-shape will tilt upward, and the upper curve of the e-shape will rebound to approximately a semicircular shape, causing the upper surface of the upper absorbent member to lean toward the wearer's body. The collapsed tubular and other structures can also be used as a central protruding member as follows.
The central protruding member contains a thermoplastic deformation element such as US Patent No. 5,300,055 issued by KB Buell on April 5, 1994. However, the central protruding member can also be a non-thermoplastic shape, such as a dense fibrous mesh. Therefore, the central protruding member can be an elastic material, especially a longitudinally stretched elastic hinge, so that when the sanitary napkin is worn, the surface of the central protruding member facing the body forms an upward convex shape.
Many of the currently invented combinations are used for the wearer's cross-parts and therefore have bifurcated parts. However, the present invention can also be applied to other objects, such as wound dressing without bifurcation. In these examples, the object has an area into which fluid flows, which is referred to as the "target area". The object part includes the vertical length of the target area, and the horizontal width of the complete object perpendicular to the length of the target area refers to the "target zone". If it is used for objects worn across the span, the terms "target zone" and "target zone" are roughly the same. The "target zone" generally does not include the part near the longitudinal side of the absorption center, because fluid absorption is planned The area is generally located in the center of the absorbent article.
The possible use methods of the present invention include absorbent articles that absorb, disperse, and retain body fluids, such as feminine care pads and related menstrual devices or sanitary napkins, including "ultra-thin" pads, pads and large pads . Similarly, the current invention can be applied to diapers, disposable training pants, other disposable clothing such as swimming clothing, fecal incontinence items, bed liners, bandages, and other absorbent articles. The present invention can also be used for special parts of articles suitable for human body to wear clothes, ostomy bags, medical absorbents and wound dressing. The article of the present invention provides good leakage protection, the absorbent performance of the fluid center filling, and the good properties of other absorbent articles.
The pre-shaped upper absorbent member is preferably an air-laid net, which contains fibrous fibers and a binder such as a thermoplastic bonding material, a heat-setting resin, or a thermally-acted crosslinking agent, wherein the central protrusion is It is formed by the hot casting of air-laid nets, such as using instruments or gas pressure to deform the air-laid nets on the surface of the mold, and then heat is used to catalyze the adhesion and stabilize the air-laid nets. It can still maintain its shape when taken out.
Especially for feminine care pads, the current invention has great advantages in terms of comfort and fit. In terms of sanitary napkins, the central area of the absorbent article moves upward due to the shaping line, and an upward protrusion is formed near the longitudinal center line of the article, which is not greater than the length of the article, but is affected by the shaping line and ends at the bifurcation. Part of the outside allows the object to fit more closely to the outer area of the bifurcation, and an example of a V shape can be used behind the object to fit the buttocks better, and the object should generally be quite flat in the horizontal direction, and bend and concave upward in the longitudinal direction, so that the front part of the cushion is more fit. When compressed by the side, the proper shaping of the outer area of the bifurcation can be achieved by adding additional cracks, strengthening elements, elastic components, or pasting elements in the absorption center.
definition
As mentioned here, a substance must be "absorbable" when it can maintain at least one hundred percent of the dry weight measured by its inherent absorptive capacity, as described below (for example, the substance has approximately equal to or greater than one Intrinsic absorptive capacity). Ideally, the absorbent material used in the currently invented absorbent member has an inherent absorption capacity of approximately two or greater than two, or approximately four or greater than four, or approximately seven or greater than seven, or even approximately Ten is larger than ten, with a distance of four to twenty-five or from twelve to forty.
As described herein, the term "absorbent article" refers to an object that absorbs and retains liquids like human body exudates, and particularly refers to an object placed close to the wearer's body to absorb and maintain various exudates from the human body.
As mentioned here, "absorbent capacity" refers to the total amount of water that an absorbent material can hold, and is the intrinsic absorbent capacity (described later) multiplied by the weight of the dry absorbent material. Therefore, a ten-gram substance with five grams of intrinsic absorptive capacity has an absorptive capacity of fifty grams (or fifty milliliters of liquid).
As mentioned here, "volume" and "density", unless otherwise specified, are based on an oven-dried sample with a diameter of 7.62 cm (three inches) and a load of 0.34kPa (0.05psi). Volume and density measurement. The density of the sample is measured in a TAPPI-conditioned room (50% relative humidity, 23 degrees Celsius) for at least four hours. The sample needs to be flat and consistent in the contact area. The volume is expressed in cc/g, and the density is expressed in g/cc.
As used herein, the term "cellulosic" refers to any substance that has cellulose as the main component, especially containing at least 50% by weight of fibrous or a fibrous extension. Therefore, this term includes cotton, typical wood pulp, non-wood cellulosic fibers, cellulose acetate, cellulose triacetate, nylon, thermomechanical wood pulp, chemical wood pulp, non-adhesive chemical wood pulp, milkweed, or Bacterial fiber.
As described herein, "central protrusion" refers to the average height of the center of the upper absorbent member along the horizontal centerline of the object and the average height of the longitudinal sides of the absorbent member above the horizontal centerline of the object after the vertical deformation test as described below The height difference. The "central protrusion" of the absorbent article currently invented is at least 0.5 cm, or at least 1 cm, or particularly at least 1.2 cm to 10 cm. Ideally, the absorbent articles invented today show a central protrusion with at least 20% increase in the bifurcated part, especially at least 50%, compared to absorbent articles that are largely the same as the amorphous thread. , And formed the central protrusion in the bifurcated part.
As mentioned here, "crepe line" and "shaped line" refer to the area where the narrow and extended area of the crease is increased by the sudden change of the material properties of the material at both ends of the line. The crepe line and the shaping line are as described here, and generally refer to the "bending line". The width of these lines may be less than 5 cm, or less than 3 cm, or less than 2 cm, especially between 0.5 cm and 1.5 cm. The geometry and characteristics of the curve will be detailed later.
As mentioned here, the "bifurcation part" of the absorbent article refers to the central area that generally contacts the user's span, near the lower part of the human torso, and is located between the front and back parts of the article. The typical bifurcation part includes the horizontal center line of the object, and generally covers about 7 to 10 cm in the vertical direction.
As described here, "elasticity coefficient" is a measurement of the slope of the tension of a net during a tension test, expressed in force per unit gram. In the Tappi condition, a 3-inch wide sample is placed in the stretchable measuring clamp of a two-inch long measuring instrument. The clamps are separated at a link speed of 10 cm per minute. When the pressure value is between 50 grams of force and 100 grams of force, the slope of the data is taken as the least square value, or between 100 grams of force and 200 grams of force. Choose the larger value. If the sample is too weak to support the pressure of at least 200 grams of force, continue to add additional thickness until the multi-thickness sample can support at least 200 grams of force without fail.
As described herein, the term "stretchable" means that an object can increase in length or width in the XY plane by at least 10%, and ideally by at least 20%. The XY plane is generally parallel to the surface of the object. The term "stretchable" includes items that are expandable and elastic (defined below). For example, for a sanitary napkin with an absorption center, the article and the absorption center are preferably stretchable in both length and width. However, the absorbent article may only have one direction, preferably longitudinal, with stretchability. Examples of stretchable materials and objects, and their preparation methods, are shown in U.S. Patent No. 5,611,790 issued to Osborne on March 18, 1997.
As mentioned here, if a volume material (absorbent material) is straight, and under the condition of TAPPI (at 23 degrees Celsius, relative humidity 50%), a strip material of 25 cm long, 1 cm The square area can be bent 180 degrees around a cylinder with a diameter of 5 cm without breaking, and there is no need to apply a force of more than 6 Newtons to both ends of the strip to maintain the bending for 3 seconds, which can be called elastic. The same material is regarded as "shape retention". Leave it on the cylinder for 5 seconds. After removing it from the cylinder, it can still maintain a 30-degree bend (for example, there is a long straight bar with an angle of 0, and the straight parts at both ends are Deformed strips bent at an angle of at least 30 degrees).
As mentioned here, the term "elastic resistance" refers to an element that supports a bending state, as opposed to an element that only supports axial force. Similarly, as referred to, "elastic resistance" is a method of expressing the elasticity of a material or object, and is measured according to the circular bending procedure, which was published in US Patent No. 5,624,423 issued by Anjur et al. on April 29, 1997 There are details. The elastic resistance is actually a measurement method of the bending hardness of the apex formed after the circular bending procedure of ASTM D4032-82. The circular bending procedure of Anjur et al. is the simultaneous multi-directional deformation of a material, in which one surface of the sample becomes concave and the other surface becomes convex. The circular bending procedure provides a force value relative to the elastic resistance, which also averages the stiffness in all directions. For comfort, the absorbent article preferably has an elastic resistance of less than or equal to 1,500 g, or equal to or less than 1,000 g, especially less than or equal to 700 g or 600 g. For the function of styling, the central absorbent region and the lower absorbent member may have an elastic resistance of less than 30 grams, or at least about 50 grams, especially at least 150 grams of elastic resistance.
As described herein, the term "horizontal" refers to the direction on the plane of the object, which is mainly parallel to the side surface of the human body of the object, or equal to the vertical direction perpendicular to the object, including the horizontal and vertical directions, and the middle direction of the object. Unless otherwise specified, the direction of the components in the object is determined by the flat direction of the object placed on the horizontal surface of the object.
As mentioned here, "intrinsic absorptive capacity" refers to the amount of water that a saturated sample can hold relative to the weight of the dry sample, and refers to a cubeless number (mass divided by mass). This test is based on the Federal Government Specification UU-T-595b. It is done by cutting a test sample of 10.16 cm long and 10.16 cm wide (four inches square) after measurement, and then soaking it in water for three minutes. The sample was then removed from the water, and a corner of it was allowed to dry for 30 seconds to dry the excess water. The sample is re-measured, and the difference in dry and wet weight is the moisture obtained per 10.16 cm² sample, calculated in grams. The intrinsic absorbency value is obtained by dividing the total amount of water obtained by the dry weight of the sample. If the material lacks proper integrity to be tested when it is wet, the test method may be modified to provide better integrity of the sample without substantially changing its absorption characteristics. In particular, the material can be reinforced with at least six hot-melt adhesives with a diameter of about 1 mm on the outer surface of the object, and waterproof tape around the material. It is necessary to prevent the adhesive from penetrating into the body of the test material when using hot melt. If the untreated sample cannot be aired for more than 30 seconds when wet, the corner of the aired sample must be strengthened with hot melt adhesive to increase its integrity.
As described herein, "polymeric mesh" refers to a porous or non-porous layer mainly composed of polymerizable materials, and can be a non-woven mesh, a plastic film, a polymerized film, a perforated film, or a foam layer. The polymeric mesh can be used as an absorbent barrier, barrier layer, bottom layer, or as the surface layer of absorbent articles if fluid is permeable. A polymer net can include 50% by weight or more polymerizable materials, or 80% or even 90% by weight or more polymerizable materials. Similar materials include polyolefin, polyester, polyvinyl compound, and polyamide.
As mentioned here, the term "sanitary napkin" refers to an object worn by women near the genital area to absorb and maintain various body exudates (such as blood, menstruation, and urine). The current invention is shown and described in the form of sanitary napkins, but it is understood that the current invention can also be used for other feminine hygiene and menstrual pads, such as pads, or other absorbent articles such as pads for excretion incontinence. The term "feminine care pad" mentioned here is synonymous with sanitary napkins.
In addition to being malleable, an absorbent article containing an absorbent center can also be stretched. The term stretchability, as mentioned here, means that the object can be stretched when tension is applied to the object, and it is also tensile. The terms "elastically stretched" or "elastically stretched" are regarded as synonymous. These terms, as described here, mean that when the planar tension is removed, the article or absorbent fiber structure tends to turn back to its unexpanded or stretched direction (or original direction), however, it does not need to go all the way back to its original direction. The direction of stretching. It can also return to the relaxed direction between the unstretched and expanded directions.
As mentioned here, the "thickness" of fluff padding or other absorbent elements refers to the thickness of a 7.62 cm diameter gauge measuring 0.05 pounds per square inch (approximately 35 kilograms per square meter) based on the embossing plate. The thickness.
As described herein, the term "transverse" refers to a direction lying in the plane of the absorbent article and generally perpendicular to the longitudinal direction. The Z direction is usually at right angles to the longitudinal and transverse centerlines. The term "horizontal" mainly refers to a significant horizontal component on the plane. Similarly, "inward lateral compression" refers to the compression from the longitudinal sides of an object to its longitudinal centerline.
The degree of protrusion of the central absorption zone can be quantified by a vertical deformation test. As mentioned here, vertical deformation refers to the increase in height due to the side surface of the absorbent article being clamped at the crotch or continuously moving inward toward the longitudinal centerline of the article, which reduces the longitudinal side by 1.5 cm Wide. The vertical deformation tester contains two clips, one of which has a width of 5 cm (the longitudinal length of the clip part at the edge of the object). One clip is stationary, and the other clip slides on the track, increasing or decreasing the distance between the two clips, while the two clips maintain a line and parallel. The clip needs to be inclined 20 degrees downwards from the horizontal, so that the outer edge of the absorbent article will be slightly protruded from the nearest crease line, thus a little imitating the position of the outer edge of the absorbent article, which is raised by the crotch part of the underwear Caused by elastic edges. The clamp is located 5 cm above the track surface. Let the pad hang between the two clamps and clamp it in the bifurcated part, so that the longitudinal side part of the absorption center can be maintained, and the clamp can extend no more than 3 inward from the outer edge of the absorption center. cm. The clamp must be used to clamp the object in the area vigorously without damaging the object, just as the bifurcated part remains horizontal before the start of lateral compression. At a rate of about 0.5 cm per second, the movable clamp moves smoothly toward the fixed clamp at a distance of 50% of the starting width of the bifurcated object (when the object becomes incompressible, for example, it needs When using more than 5 kg of force to further compress the object, the distance is less than 50% of the width). Record the height of the liner or the center of the absorbent article before and after the clip is moved, and the resulting gap is the vertical deformation. If the height increases, it is a positive number, and if the height decreases, it is a negative number. The vertical deformation of the absorbent article is preferably at least about 0.5 cm, or the vertical deformation is at least about 1 cm, or at least 1.5 cm, especially up to 10 cm. The presently invented absorbent article preferably shows an increase in the vertical deformation of the bifurcated part by at least 20%, especially in a same absorbent article without a shaping line, the vertical deformation of the bifurcated part is increased by at least 100%. Fifty points.
As mentioned here, the'wet volume' is the measurement of the sample caliper made according to the definition of'volume' (at 0.344kPa) mentioned above. Except for the sample in a specific state, it is uniformly deionized Spray with water until the wet sample volume is approximately 250% of the dry sample volume (for example, the increased moisture volume is 150% of the dry sample volume). If the sample cannot be absorbed by the spray and maintains sufficient humidity to increase by 150%, the increase in the maximum humidity increase is below 150%, but still exceeds 1% Hundreds of them can still be used. The calculation of the wet volume is based on the unit of cc/g, and the flat wet sample is divided by the basis weight of the oven-dried sample under a load of 0.344kPa (0.5psi). The absorbent material in the absorbent member of the present invention has a wet volume equal to or greater than 4cc/g, or equal to or greater than 6cc/g, or equal to or greater than 10cc/g, especially equal to or greater than 15cc/g, and its range is approximately from Between 5cc/g and 20cc/g.
As described here, the'wetting:drying ratio' is the geometrical wetting tension divided by the geometrical drying tension. Geometrical Tension (GMT) is the square root of the result of the tension in the machine direction and the tension in the cross machine direction of the web. Unless otherwise specified, the term'tension' refers to'geometric tension'. In the current invention, the absorbent web is wet: the dryness ratio is approximately equal to or greater than 0.1, especially equal to or greater than 0.2. Tension can be measured with an Instron tension tester with a clamp that is two inches wide and the other clamp is two inches apart, and a 25.4 cm per minute link coupling, before keeping the sample under TAPPI conditions for four hours. . The presently invented absorbent web has a minimum absolute ratio of dry tension to the basis weight of 0.01 g/gsm, especially 0.05 g/gsm, or 0.2 g/gsm, or 1 g/gsm, or most particularly 2 g /Gsm to about 50 grams/gsm.
Schematic description
Figure 1 shows a top view of the currently invented sanitary napkin.
Figure 2 shows a cross section of the sanitary napkin in Figure 1.
Figure 3 shows that the central protruding member has a structure folded into an e.
Figure 4 shows the central protruding member at various stages of side compression.
Figure 5 shows a sanitary napkin with a central protruding member in the central absorbent area.
Figure 6 shows a top view of an absorbent article with bending lines in the upper absorbent member.
Figures 7A and 7B show two forms of the central protruding member.
Figures 8A to 8C show the arrangement of various holes in the horizontal absorption barrier.
Figure 9 shows the various shapes of the central absorbent member.
Figure 10 shows a cutaway view of the central protrusion formed by the intermediate absorbent member of the sanitary napkin on the horizontal absorbent barrier.
Figure 11 shows a cross section of the intermediate absorbent member, with the absorbent material divided into three longitudinally extending pockets.
Figure 12 shows a transverse cross-section of the absorbent article. The horizontal absorbent barrier includes longitudinal upward protrusions near the longitudinal sides of the horizontal absorbent barrier.
Figures 13A to 13C show longitudinal cross-sections of three different systems of absorbent articles with central absorbent members.
Detailed description of the icon
Figure 1 shows a top view of the currently invented object (10), which shares the same cross-section as shown in Figure 2. The object (10) includes a fluid-permeable surface layer (12), which has been cut open in the first figure to show the composition below it, and is connected to the bottom layer (14) with an absorption center (15) in between. The absorption center (15) includes a lower absorption member (22) and a central absorption area (16). The central absorption area (16) has an upper absorption member (18). There is a narrower middle absorbent member (20) below the upper absorbent member (18). Preferably, the intermediate absorbent member (20) can be mainly located in the bifurcated portion (48) of the article, where it deforms the upper absorbent member to form a central protrusion (30) in the bifurcated portion. The intermediate absorbent member (20) is preferably a pressed cloth with elastic fiber mesh. As mentioned here, the press cloth refers to the absorbent insert in the absorbent center, which is generally used to deform or shape the adjacent layer of the absorbent member. In the current invention, it is used to create a central protrusion to enhance the fit of the wearer's body. .
There is a horizontal absorption barrier (24) between the central absorption area (16) and the lower absorption member (22), which is wider and longer than the upper absorption member (18). The horizontal absorption barrier (24) is used to hinder the flow of fluid between the central absorption area (16) and the longitudinal sides of the object (10), especially in the longitudinal direction of the lower absorbent member (22) of the bifurcated part (48) Side. The horizontal absorption barrier (24) extends beyond the sides of the central absorption zone (16) to form a long and narrow protrusion (34). In a combination, the elongated protrusions (34) in the bifurcated part (48) (generally the so-called target area) of the object (10) cover about 2% of the surface of the lower absorbent member along the transverse centerline of the object Fifteen or more, or fifty percent or more, or eighty percent, and even in some combinations, one hundred percent is covered in the bifurcated part (48).
The horizontal absorption barrier (24) is preferably flat, although there may be some degree of bending, bulging, or depression of the horizontal absorption barrier (24) due to the non-planar structure or gap of the lower absorbent member (22) Place.
The horizontal absorption barrier (24) includes a barrier material, which can be a polymer film or a plastic film; a woven net; a rubber layer, a thermoplastic material, silicone, or other non-absorbent materials, or, for example, a more difficult Penetrating paper layers, including translucent cellophane, wax paper, saturated paper, paper-polymer composites, paper or fabric treated with water repellency, or containing internal sizing to make it less water-absorbing. The barrier material preferably has less than 20% holes, or less than 10%, especially the barrier material is impermeable or impermeable, although there are fine areas in the specific area of the barrier material. Slit (36) to prevent over-saturation of the central absorption zone. With the addition of the slits (36), the average open area of the barrier material is preferably less than 20% in the target area, especially less than 5%. The barrier material is within the standard range between 0.02 cm and 0.3 cm, and can have a thickness equal to or less than 0.2 cm, or equal to or less than 0.1 cm, especially equal to or less than 0.08 cm.
The barrier material preferably has an internal absorption capacity (described below) less than 0.5, especially less than 0.1, and more particularly close to 0.
The position of the horizontal absorption barrier (24) for water permeability, pores or surface chemistry is different depending on the material, and the absorption will be delayed or blocked in different degrees depending on the position. In particular, the horizontal absorption barrier will create one or more openings or pores (36) under the middle absorption member (20) to allow fluid to flow from the central absorption area (16) to the lower absorption member (22).
The horizontal absorption barrier (24) may include a bottom layer (14) area, which stretches along the side edge of the lower absorbent member (22) or envelops one or more side edges (this combination is not shown), and is placed on the lower absorbent member (22). ) Stretch a distance on the surface of the side of the body. Therefore, the bottom material (14) can be stretched in the layer of the absorption center (15) to form part of at least one horizontal absorption barrier (24). The horizontal absorption barrier (24) can also include a single polymer net with a bottom layer (14) as a whole, which means that the two components can be formed by a single area of the polymer net.
The horizontal absorption barrier (24) may include multiple components, such as a polymer film of two or more regions, or a combination of a saturated region on the human body side surface of the lower absorbent member and a polymer film, or the like.
The horizontal absorption barrier (24) may have an inconsistent thickness, including features such as bumps or protrusions (not shown) from the surface, and interact with other components in the absorbent article. The horizontal absorption barrier (24) may also have ridges or creases to help the object bend, or to help change the hardness and comfort of the object.
The horizontal absorption barrier (24) can have adhesives on both sides of the surface, or on one of the upper surface (body side) and the lower surface (clothing side), which helps to cross the horizontal absorption barrier (24). Deflection force steering, or sub-optimal, can also be non-sticky.
The width of the middle absorbent member (20) in the bifurcated portion (48) may be smaller than the width of the upper absorbent member (18) by about 2 cm or more, or 5 cm or more, or 8 cm or more, and It is even between 10 cm and 30 cm. The length of the intermediate absorbent member (20) is preferably approximately equal to the length of the bifurcated portion (48), generally less than half the length of the article (10), and often about one-third the length of the article (10). The thickness of the middle absorbent member (20) is preferably greater than the thickness of the upper absorbent member (18), such as a thickness of approximately equal to or greater than 1 cm, especially equal to or greater than 3 cm.
The average hole size of the middle absorbent member (20) is preferably smaller than the hole size of the upper absorbent member (18). For example, capillary action can remove fluid from the upper absorbent member (18) to the middle absorbent member (20) to improve Feeling dry.
In a combination, the middle absorbent member (20) is a Chinese Communist protruding member, such as a flat and rolled fabric or paper structure, including a material folded into e, with a center line parallel to the longitudinal center line (29) of the object (10) ) (The e-shaped flat horizontal bar is located horizontally and perpendicular to the longitudinal centerline (29) of the object). Compressed from the side of the longitudinal centerline of the object (10), the e-shape of the plane is inclined upward, and the upper curve of the e-shape springs back to the shape of about half a circle to promote the upper surface of the central absorption zone (16) to move toward the wearer's body.
The upper absorbent member (18) can be shaped in advance, and it tends to incline upward when the sides are compressed, at least indicating that the middle absorbent member (20) is semi-independent. For example, the upper absorbent member (18) can be embossed, thermally embossed, molded, or shaped in advance. The upper absorption member (18) can be a fluff wood pulp net reinforced with thermoplastic fibers, and the thermoplastic fibers are molded by heat or thermal relief to form an upwardly inclined shape. In a combination, the upper absorbent member (18) is an airflow laying material or airflow laying composition, which is formed on a shaped surface, such as a wire mesh, or a porous sintered surface, to conduct an internal direction The shape of the depression. Adhesive materials such as thermoplastic fibers help to make an elastic pre-formed absorbent article that can maintain its shape without the intermediate absorbent member (20) and the absorbent center (15) being wet.
The upper absorbing member (18) preferably has hardness, especially at least one of the bending resistance, elastic coefficient, or bending stiffness is greater than the middle absorbing member (20) and/or the lower absorbing member (22). When the side edges are compressed, the upper absorbent member (18) increases its stiffness, helping to promote relatively upward creases. Preferably, the longitudinal sides of the upper absorbent member (18) can be attached to the body side surface of the horizontal absorbent barrier (24).
When the composition of the central absorption zone (16) is wet, it is better to maintain its shape and hollow volume. For example, the middle absorbent member (20) and/or the upper absorbent member (18) should preferably have a degree of wet elasticity, especially a rebound rate equal to or greater than 0. As issued in the United States of America on September 30, 1997, Wendt ea1. The definition in Patent No. 5,672,248 is for reference. In other combinations, the intermediate absorbent member (20) includes a fibrous fiber press cloth, which is reinforced by adding thermoplastic materials such as polyolefin fibers or PET fibers, and is stabilized by adding a wet strength agent such as Kymene.
The lower absorbent member (22) preferably contains fibers, and there are two separate crepe lines (28) at the bifurcated portion (48). When the article (10) is compressed from the side inward, it helps to absorb along the lower part. A concave crease is formed on the component (22). The central area of the entire absorption center (15) between the crease line (28) is preferably inclined upward when it is compressed by the side. Toward the end, the lower absorbent member (22) can be adhered to the central absorbent area (16) by attachments (30) such as adhesives, heat, or ultrasonics to prevent the central area of the lower absorbent member (22) from generating Bend down. Furthermore, a selected central lifting member (not shown) can be placed below or in the middle of the absorption center (15), which can further promote the absorption center (15) to tilt upward when the side is compressed.
The lower absorbent member (22) includes an outer absorbent area (38) and an inner absorbent area (40) restricted by a crepe line (28). The inner absorbent area (40) is inclined upward to form an inverted U shape, for example, when The longitudinal sides with the outward sides are also inclined upward (for example, the outer side of the letter W is inclined). A downward crease (depressed crease) can therefore be produced along the crease line (28). The crease line (28) is preferably a mark that creases the lower absorbent member (22) significantly along the crease produced before the article is assembled. Another possibility is that the mark can be a V-shaped cut, which is produced by removing the material of the lower absorbent member (22). The V-shaped cut in the lower absorbent member (22) penetrates at least about 10% of the thickness, and preferably 20% of the thickness. The crepe line (28) can also be produced by embossing.
Generally speaking, the absorbent material of the absorbent center (15), including any lower absorbent member (22), middle absorbent member (20) and upper absorbent member (18), can be laid by one or more piles of wet laying or airflow laying. Laying fabrics; fibrous airlaid webs of fine fibers (commonly known as air-laid felts); other dry laid webs; fibrous superabsorbent mixtures or compositions; hydroentangled webs containing fibers; artificial fibers and velvet fibers The composite; rayon; 1yocell or other soluble twisted hydrophilic fibers; fiber foam including regenerated fiber foam; hydrophilic and elastic foam; peat moss and other absorbent plant substances; foam structure fiber absorption Sexual material, US joint patent application "Fiber absorbent material and its manufacturing method" filed by F.-J. Chen et al., No. 09/083,873, issued on May 22, 1998; by high internal stage Absorbent foam manufactured by latex (HIPE) or other methods, such as the foam disclosed in US Patent No. 5,692,939 filed by DesMarais on December 2, 1997. Conformal, hydro-entangled mixtures of fluff fibers and polymers are also helpful to the current invention. Related materials are published in the United States Patent No. 4,879,170 issued to Radwanski et al. on November 7, 1989, and George et al. on September 27, 1994 al. All are shown in the proposed US Patent No. 5,350,624.
The absorbent article (15) also contains free-flowing absorbent materials, such as fiber particles, especially eucalyptus particles, which are formed by mixing high-concentration wood pulp to tightly bundle fibers. With the addition of non-adhesive agents, surface tension-reducing substances such as detergents, lubricants, silicon compounds, or the same substance can actually form free-flowing fibrous particles less than 1 cm, suitable for being combined into the absorption of the present invention. Absorbent pocket in the center. The principle of fiber particles and their composition of absorbent articles is explained in the joint application patent No. 60/129,746 "Absorbent molecules with fiber particles and free-flowing molecules" filed on April 16, 1999. The principle of combining fibrous particles and superabsorbent molecules in absorbent articles is also found in US Patent No. 5,800,417 issued by K. Goerg-wood et al. on September 18, 1998. The use of other free-flowing molecules, such as polymethylurea spheres, can be found in the PCT application WO98/43684 filed by M. Raidel on October 8, 1998. Discrete fiber particle notches or other free-flowing molecules in the absorption center (15) can be formed by two fibrous webs with bonding and thinning, and bonding materials. This is based on the principle of forming the notch of superabsorbent material in US Patent No. 5,030,314 proposed by TBLang on July 9, 1991 or other methods.
Many fiber materials can be used in the absorbent material of the absorption center (15), including wood fibers, such as bleached kraft paper softwood or hardwood, high yield wood fibers, thermochemical pulp fibers, bagasse, milkweed plants, straw , Kenaf, hemp fiber, pineapple leaf fiber, or peat moss. High-yield fiber can be used to make absorbent members. The fiber can also be cross-linked, treated with sulfonic acid groups, treated with lye, heat treated, mixed with thermoplastic stable quaternary fiber, or treated with a wet strength agent. A variety of fiber blends, including conformal, and other thermoplastic fiber and wood fiber blends can be used in the air-laid process.
The absorbent material of the absorption center (15) can include chemically modified fiber, including any fiber derivatives, such as 2,3-dialdehyde fiber or other extracted fiber polymers, such as K. Rahn and T. Heinze proposed in, Cellulose Chemistry and Technology, 32:173-183 (1998) "New cellulosic polymer produced by the change of 2,3-dialdehyde, including the heavy sub-type of 2,3-dialdehyde cellulosic Sodium sulfate, or a variety of carbonic acid compounds. The modified cellulosic compound may be in the form of powder, fiber, or film. Polygonal fibers or fibers with complex protruding cross-sections can also be used in the current invention.
In another better combination, at least one of the components of the absorbent center (15) includes a molded three-dimensional high-volume wet-laid fibrous web, such as a non-crepe-treated air-flow drying web, in 1997 On August 15th, F.-J. Chen et al.'s U.S. Common Patent No. 08/912,906 "Wetted Elastic Net and Disposable Objects Made from It" was proposed in the United States; March 21, 1995 SJ Sudall and SA US Patent No. 5,399,412 filed by Engel; US Common Patent No. 5,672,248 filed by Wendt et al. on September 30, 1997. The non-corrugated structure like this provides a variety of flow channels along the surface of the net. When other flat materials such as polymer films are stacked, there will still be gaps on the surface close to the mesh to allow fluid to flow parallel to the plane of the mesh. In addition, the non-creped fabric has good wetting elasticity and high volume when wet. If not limited by theory, the three-dimensional surface structure of this structural net can maintain its shape and volume when wet. Because the hydrogen binder is in a three-dimensional state when the fiber is composed, the structure will not be affected when it is wet. Become a flat state.
The absorptive capacity of the absorbing member can be fully utilized for the purpose of the article. For some applications, such as sanitary napkins, the absorbent capacity of the central absorption zone (16) is preferably at least 7 ml of fluid, or 10 ml, or 16 ml, or 20 ml, or preferably between 15 and 35 ml. . For large items such as diapers, the absorbent capacity of the central absorption zone (16) should generally be greater than 60 ml, but equal to or less than 300 ml of fluid, especially 200 ml, or between 80 and 250 ml, or between 100 and 100. Between 300 ml.
In a combination, the absorptive capacity of the lower absorbent member (22) is less than the absorptive capacity of the central absorbent zone (16). This is useful in ultra-thin objects. For example, the absorptive capacity of the lower absorbent member (22) may be 5 to 100% of the absorptive capacity of the central absorption zone (16), or a ratio of 90%, or 70%, especially Thirty percent. In sanitary napkins and related articles, the absorptive capacity of the intermediate absorbent member (20) may be about 3 ml, or 5 ml, especially 10 or more than 10 ml.
For ultra-thin pads and other absorbent articles, the total thickness of the dry components of the absorbent center (15) is about 2 cm to 15 cm, especially between 3 cm and 8 cm. When wet, the central absorption area (16) and/or the lower absorption member (22) can greatly increase the thickness and void space, for example to 100%, or 200%, especially 300% or more. An example of a low-cost fibrous component that can increase thickness when wet, refers to the US Patent No. 5,865,824 proposed by Fung-Jou Chen and JDLindsay on February 2, 1999, "Automatically deformable absorbent structure and its constituent absorbent articles The absorbent material described in', or the dense structure in the'high-density absorbent structure' proposed by Hollenberg et al. on July 14, 1998, US Patent No. 5,779,860. The regenerated fibrous sponge material can also expand greatly when wetted, and by virtue of the properties of the material with different basis weights that it expands in a three-dimensional shape, it can be used to enhance fit and comfort. Dense cross-linked fibrous mats are also available.
The ideal surface layer (12) should be compliant, soft, and non-irritating to the user's skin. For this purpose, it can be made of any traditional material. Uncountable suitable materials include woven and non-woven polyesters, polypropylene, nylon, rayon and the like, especially in the form of coagulated or perforated thermoplastic films, including those developed by Mulane and Smith on April 13, 1982 It is described in U.S. Patent No. 4,324,246 and U.S. Patent No. 4,342,314 filed by Radel and Thompson on August 3, 1982. The form of mechanical perforation can also be used. Other known surface materials can also be used, including a deformed fibrous bottom layer with a waterproof material in a specific area, especially the most prominent part of the bottom layer, such as the U.S. Joint Application Patent No. 08/997,287 on December 22, 1997. As described in'Double Zone Absorption Net'. The surface layer (12) preferably has holes in the central area, which can effectively absorb the fluid and penetrate the woven net. From the upper absorbent member (18) or other hydrophilic fibers, it is also best to expand into the pores of the surface layer (12) to help promote the absorption of body fluids and improve the fluid flow between the body and the central absorption zone (16). Conduction. For example, through the airflow laying process, the surface layer (12) is placed on a thin layer of absorbent material gas permeable, and short hardwood fibers can be added to the holes of the perforated film or non-woven mesh. Only a few milligrams of additional hydrophilic fibers, such as bleached eucalyptus in the surface pores, can improve the absorption performance of the perforated waterproof surface.
The outer surface of the surface layer (12) can be treated with surface tension substances such as detergent to improve fluid penetration, and there is a wettability formed by different chemical treatments on the two surfaces of the surface layer (12), or the surface layer (12) plane is different Areas have different surface chemistries, and fluids are excluded from other areas and absorbed by the target absorption area. Surface tension reduction treatment, or the application of other wetting agents, can be accomplished by many common techniques, such as spraying, padding, or the use of transfer rods. Effective humectants include polyethylene glycol monolaurate (for example, PEGOSPERSE 200ml, polyethylene glycol 200 monolaurate available from Lonza, Inc., Williamsport, Pa., US), and ethoxylated ten Octaene (eg VOLPO-3 Croda, Inc., New York, NY, USA). Lymph fluid treatment, electron waves, and corona discharge can be used to change the surface chemistry.
The bottom layer can be a liquid-impermeable film and is impermeable to odors. The bottom layer, like other components of the object (10), can be stretched to achieve a customized fit. The bottom layer should be quite quiet, soft, and non-irritating when worn. The bottom layer can contain many materials used for absorbent articles, including polymer films, low permeability non-woven nets, cloth layers containing impermeable layers or films, and polymerized fabric composites. The bottom layer and other components may be biochemically dissolved or flushed into the toilet.
Because an impermeable horizontal absorption barrier can be placed under the central absorption zone in many currently invented combinations, it is not impermeable but makes the bottom layer completely impermeable, at least not over the entire area. Using an impermeable absorption barrier to properly control the fluid in the central absorption zone will allow the main function of the bottom layer to provide the integrity of the object. However, for the best results, the bottom layer is best impermeable, although it allows moisture to pass through for comfort. The bottom layer can also be breathable and stretchable at the same time.
Figure 3 shows a perspective view of an absorbent central protruding member (50), which can be used as an intermediate absorbent member of the absorbent article of the present invention (not shown), or can be placed in a horizontal absorbent barrier (not shown) of the present invention. Below. The central protruding member (50) consists of a layer of material. After the package is folded, there are two longitudinal sides (52', 52"), an upper area (54), a first lower area (56) and a second lower area (58). ), the two are finally connected to the two ends (60, 62) respectively. The ends of the lower area (56, 58) overlap each other in the overlap area (64). In the two lower areas (56, 62) of the overlap area (64) 58) Can slide freely over each other, or can be fixedly connected to prevent one side from sliding below the other side. In the combination shown, the lower area (56, 58) can slide freely over the other side. Central raised member (50) There is a horizontal width W, a longitudinal length L, and a Z-direction thickness T. In the absorbent article before use, the width W of the central protruding member (50) can be equal to or smaller than the minimum width of the absorbent article in the bifurcated part. However, the width W of the central protruding member (50) may be approximately equal to or less than 90% of the minimum width of the absorption center in the bifurcated part of the absorbent article, or equal to or less than 70%, or equal to or Less than 50%. If not limited, the width W, thickness T, and length L of the central protruding member (50) suitable for sanitary napkins and related absorbent articles can be measured as follows in the unused and uncompressed state: Width W, from 10 cm to 60 cm, especially 15 cm to 40 cm; thickness T, from 1 cm to 15 cm, especially 3 cm to 8 cm; length L, from 10 cm to 100 cm, or from 15 cm To 85 cm, especially from 30 cm to 70 cm.
The material forming the central protruding member (50) is approximately folded into a compressed e shape, as shown, with a lower area (58) corresponding to the central horizontal bar of'e', which stretches across the width area of'e'. Therefore, the folded shape of the central protruding member (50) is similar to that of being folded into a tubular material area with overlapping ends (60, 62) in the overlapping area (64), and the tubular shape is vertically compressed to be flat. When the sides are compressed, the lower regions (56, 58) of the folded material connected to the two ends (60, 62) can slide to the opposite longitudinal sides of the object. In particular, the end (60) of the second lower area (58) slides toward the first longitudinal side (52'), and the end (62) of the first lower area (56) slides toward the second longitudinal side (52"), or remain stationary, or fixed to the area below the object. In this deformation process, the upper area (54) tilts upwards.
The central protruding member (50) can be an elastic absorbent material, such as dense air-laid wood pulp fibers, conformal, one or more layers of inelastic, elastic fabric. It also contains non-woven nets, foam nets, elastic rubber or elastic layers, and the like. In an optional combination, a central protruding member may be folded into a flat tube or the same elastic net, for example, a C-shape rotated clockwise by ninety degrees.
The central protruding member (50) is preferably elastic enough to lift a load of 50 and at least 4 mm when it is placed on a solid plane, and the longitudinal sides face the longitudinal centerline side of the central protruding member (50) Squeeze so that the longitudinal sides do not exceed a distance of 13 cm. A rectangular barrier with a length of 50 cm and a width of 5 cm in the intersection area has a length of 2 inches along the longitudinal sides of the central protruding member, which can be used to evenly place the longitudinal sides and move them to any side. The protruding load is the vertical guide axis on the device, such as the Mitutoya Digimatic display (for example, the model 543-55-1, whose axis is appropriately corrected for the correct load). An acrylic plastic area with a thickness of 0.7 cm, a length of 50 cm and a width of 20 cm is placed on the central protruding member (50), below the center of the indicator axis to evenly distribute the load of the axis. The axis displacement caused by the compression of the longitudinal sides of the central protruding member (50) is the vertical distance of the axis displacement.
Figure 4 shows the central protruding member (50) in various deformed states. From Figure 4A, a vertically compressed central protruding member (50) with little or no side compression, to continue to receive larger and larger sides Figures 4 B to 4D showing side compression and vertical bending.
Figure 5 shows a cross section of a current invention along the transverse centerline of the absorbent article (10). Here, the intermediate absorbent member (20) is also the central protruding member (50), which is like an e-shaped absorbent net. Here, the crease line (28) is approximately directly below the longitudinal side edge of the upper absorbent member (18).
The clothing surface of the bottom layer (14) is further provided with a pressure-sensitive adhesive strip (70) and a torn paper sheet (not shown) in order to effectively stick to the wearer's clothing. The adhesive strip may further include microcapsules with a vehicle, which can only be released when the strip of torn paper is torn apart, thereby destroying the microcapsules, such as US Patent No. 5,591,146 issued by Hasse on January 7, 1997 As described in. Microcapsules contain odor control agents, fragrances, skin health agents, and the like.
Figure 6 shows a top view of the sanitary napkin (10) of the present invention, with an arc-shaped crepe line (28) in the lower absorbent member (22) below the horizontal absorbent barrier. The surface is not clearly shown.
The upper absorbent member (18) includes an optional setting line (72), which includes two sets of outward isometric lines (76) at the longitudinal ends of the central longitudinal line (74), as shown in the figure, includes two short regions. The outward isoline (76) preferably contains cracks, perforations, or other methods to reduce stiffness. When the side of the bifurcated part is squeezed, the object (10) should deform along the crease line (28) to form a notch, and a protruding central area is formed on the upper absorbent member (18), because the middle absorbent member (20) The control part is tilted.
Figures 7A and 7B show two types of central protruding members (50). Figure 7A shows a central protruding member (50) with longitudinal sides (78), two crease lines (80), and a central longitudinal hinge (82) or sizing line for upward folding. When the longitudinal sides (78) move inward toward the longitudinal center line of the original CCP protruding member (50), the central protruding member (50) forms a V-shape (for example, the direction indicated by arrows 84, 86), which increases significantly The thickness of the central protruding member (50), and the upper absorbing member (18) is vertically inclined (not shown).
The central protruding member (50) can be placed above the horizontal absorbing barrier, and close to the longitudinal end (78) of the central protruding member (50) by bonding the sediment. Other bonding or joining methods can also be used.
Figure 7B shows a central protruding member (50) similar to Figure 7A, but without crease lines or hinge elements. The central protruding member (50) includes an elastic net (88) with two ends (90), which is arranged on the lower net (92) by connecting areas (94) such as adhesives or hot rods or the like. The length of the elastic net (88) in the connecting area (94) is greater than the linear distance in the connecting area (94). In this way, the elastic net (88) is arranged in a curve convex to the side of the wearer's body. Before being compressed and loaded, the central protruding member (50) has a slit between the central part (96) of the elastic net (88) and the lower net (92). The distance (98) is approximately equal to or greater than 0.5 cm. It is less than 0.3 cm, and the height of the slit is between 0.7 cm and 2 cm. When compressed to the inner side, the two ends (90) of the elastic net (88) move to each other in the direction of the arrow (84, 86), the slit height (98) increases, and the central part (96) of the elastic net (88) ) Move vertically upwards toward the wearer's body. (As shown in the figure, the height of the slit is exaggerated for clarity).
In a combination, the elastic net (88) in Figure 7B consists of multiple thin elastic materials, such as fabric or polymer film layers, which have been bent or shaped first, so that they will bend upward when they are compressed inward by the side. , Especially the pre-geometric treatment of upward bending.
Figures 8A to 8C show three forms of horizontal absorption barriers on a dog bone-shaped absorbent article (not shown). Different horizontal absorption barriers are distinguished by the characteristics of the hole, allowing fluid to pass through the central absorption zone (not shown) ) To the lower absorbent member (not shown) placed underneath. In these combinations, the extent of the horizontal absorbent barrier extends to or greater than the outer periphery of the lower absorbent member, and corresponds to the size and shape of the bottom layer (not shown). In Figure 8A, the semicircular hole (100) is located at the longitudinal end of the horizontal absorption barrier (24). When the central absorption zone becomes wet at its longitudinal end, it only allows fluid to flow from the central absorption zone to the lower absorption member Fig. 8B is similar to Fig. 8A, including an additional slit (102) to allow a small amount of absorption or fluid to flow from the central part of the central absorption zone to the lower absorption member. Figure 8C shows another combination. On the horizontal absorption barrier (24), the hole (104) at one longitudinal end is different from the opening area and shape of the hole (106) at the other longitudinal end. Here, the horizontal absorption barrier (24) allows the absorbent article to have different front and rear parts, one of which absorbs more flow than the other. Small round or five-sided holes, such as those with a diameter of less than 1 cm, can be further placed on the horizontal absorption barrier, especially in the central part of the central absorption zone.
Figures 9A to 9G show a variety of different shapes of the intermediate absorbent member (20), including a parallelogram (Figure 9A), a circular parallelogram (Figure 9B), and an ellipse (Figure 9C) , A lemon shape (Figure 9D), an X shape (Figure 9E), an iron diamond shape (Figure 9F), and a ring-shaped ellipse (Figure 9G). The shape of the middle absorbent member (20) can affect the deformation of the lower absorbent member and the upper absorbent member in the article, as well as the stiffness and comfort of the bifurcated part. Some combinations use shapes with narrower longitudinal ends on the horizontal centerline of the object, as shown in Figure 9C, 9D, and 9G. The shape can be rectangular or wider at both ends than the center. Without being limited by theory, the rectangular shape shown in Figures 9A and 9B is believed to provide more and better comfortable folding in absorbent articles, and it can promote the protrusion of the central part along the longitudinal centerline of the article and provide the fabric of the article. Comfort. However, other shapes can still be used to enhance other uses.
Figure 10 is a partial cut-away view of the present invention (10). The surface layer (12) is cut to show several underlying components, especially the upper absorbent member (18). A central protrusion (30) is formed due to the intermediate absorbent member (20) underneath, which is a truncated oval shape. The thickness of the upper absorbent member (18) is greater than that of the upper absorbent member (18). The upper absorbent member (18) further comprises a pair of longitudinal crease lines (28) at the bifurcation part, and the crease lines (28) are arranged on both sides of the longitudinal center line of the object. The crepe line (28) is located on the lateral outer side of the longitudinal side edge of the middle absorbent member (20) and inside the longitudinal side edge of the upper absorbent member (18). The crepe line (28) also extends to the lower absorbent member (22) underneath, and also has a thickness smaller than that of the middle absorbent member (20) (although the middle absorbent member (20) may be larger than the upper absorbent member (18) and the lower absorbent member (22). ) One or both of them are thin). Therefore, in the upper absorbent member (18) and the lower absorbent member (22), the crepe line (28) allows the outer longitudinal sides of the lower absorbent member (22) to fold upwards, and also allows the upper absorbent member (18) to be in the absorbent article (10) When the wearers leg is compressed to the inner side, a notch fold is formed, and the protruding central absorbent member is compressed to the inner side to make the object produce a full W shape (the central part of the W shape is best Be enclosed), contribute to the formation of the central protrusion (30).
The upper absorbent member (18) and the middle absorbent member (20) are separated from the lower absorbent member (22) by a horizontal absorbent barrier (24), which extends beyond the scope of the lower absorbent member (22), and is connected to the outer layer on the periphery .
Figure 1 shows the transverse cross area of the intermediate absorbent member (20), and its absorbent material is divided into three longitudinally stretched pockets (110, 112, 114). The two outer pockets (110, 114) of absorbent material are separated by the central pocket (112) of absorbent material, and the height of the outer pockets (110, 114) is greater than that of the outer pockets (110, 114). The pocket can be independently wrapped in a woven or non-woven net, or even unwrapped. The outer pockets (110, 112, 114) of absorbent materials can also be partially separated by folding the material of the surface layer (not shown) or the bottom layer (not shown). The central pocket (112) may also contain loose fibrous particles or absorbent free fluid molecules. When the middle absorbent member (20) is compressed toward the inner side, the outer pockets (110, 114) can be used as inclined plates to further protrude the central pocket (112) toward the wearer's body.
Figures 1 and 2 show the transverse cross-sectional area of the absorbent article (10) similar to Figure 2, except that the upward longitudinal protrusions (116) extend from the horizontal absorbent barrier (24) and are restrained on the intermediate absorbent member (20) The longitudinal sides of the upper absorbent member (18) in the central absorbent area (16) . The longitudinal protrusion (116) is elastic in the longitudinal direction (for example, it can stretch in the longitudinal direction), but when the absorbent article is compressed, it has sufficient hardness to promote the formation of notched creases in the absorption center (15). Or when the side edges are compressed, there is sufficient hardness to restrain the longitudinal side edges of the upper absorbent member. The upward longitudinal protrusions (116) on the horizontal absorption barrier (24) can affect the crease generated when the object (10) is compressed by the side, similar to the case of the crease line (28) in the object (10) in Figure 2 . The crease line (not shown) is optional in the article (10) of Figures 1 and 2, although it is better to have a crease line in the lower absorbent member (22), even preferably in the horizontal absorbent barrier (24) It is arranged vertically with the upward longitudinal protrusions (116). The upward longitudinal protrusion (116) can be inserted into the horizontal absorption barrier (24), or it can be a thermoplastic element with a width from 0.3 to 3 cm and a length from 0.2 cm to 5 cm, especially from 0.5 Cm to 2 cm. The upward longitudinal protrusions (116) can also be produced in the horizontal absorption barrier (24) by thermoforming stamping, mold, thin layer model, etc., or the upward longitudinal protrusions on the horizontal absorption barrier can be Separately form areas, use glue, heat, ultrasonic, or the same method to add them to the film or other barrier materials. The upward longitudinal protrusions (116) at the bifurcation part can extend longitudinally from 10 cm to 100 cm, and can be a series of protrusions or bumps arranged discontinuously in a straight line. The hardness and thickness of the horizontal absorption barrier (24) and the upward longitudinal protrusions (116) should be fully utilized to provide good control of the cushion shape without unduly hindering the fluid flow or comfort of the article (10). Generally desirable The use of the upward longitudinal protrusion (116) requires a relatively hard or thick horizontal absorption barrier (24), for example, a thickness of 0.2 cm to 1 cm.
Figures 1 and 3 A to 13C show the longitudinal cross section of the absorbent article (10) along a longitudinal centerline in the current invention (for example, the longitudinal centerline 29 in Figure 1), showing three types of intermediate absorbent members (20) choose. The cross-sectional views of the first and third figures A to 13C are perpendicular to the aforementioned transverse cross-sectional views to show how the various components are related to each other and connected to the longitudinal length of the object (10). In the article (10) in the first and third figures A, the middle absorbent member (20) is thinner and shorter than the upper absorbent member (18). The bonding area (120) is connected with a small part of the upper absorption member (18) and the horizontal absorption barrier (24). The surface layer (14) is connected to the bottom layer (12), and is selectively connected to the horizontal absorption barrier (24) at the longitudinal end (118) of the object (10). A gap (122) is located between the upper absorbent member (18) and the horizontal absorbent barrier (24), near the longitudinal ends of the middle absorbent member (20). In the bifurcated parts near the longitudinal ends of the middle absorbent member (20), there is preferably no adhesive to connect the upper absorbent member (18) with the horizontal absorbent barrier (24), so as to promote the formation of the void (122) and make the article (10) Allow the gap (122) to expand when tied up or compressed by the side. In other words, when the object is pulled up or compressed by the side, the deformation of the upper absorbent member (18) not only strengthens the contact with the body, but also causes the expansion of the void (122), allowing fluid even when the upper absorbent member (18) is saturated. The energy still flows through the upper absorption member (18) and is received by the gap (122), so that the fluid can further move to the middle absorption member (20) or the lower absorption member (22).
The first and third figures B and 13C are the same as the first and third figures A, except that the thinner intermediate absorbing member (20) in the first and third figures A is replaced by other shapes. Fig. 1 and Fig. 3B show that an intermediate absorbing member (20) is not tapered in the longitudinal direction, thus forming a gap (122) larger than that of Fig. 1 and 3A. Figures 1 and 3 C show a particulate intermediate absorbent member (20), which contains a layer of free-flowing absorbent molecules, such as fibrous particles, hollow microspheres, or micropores. The gap (122) is greatly reduced in size, and the particulate intermediate absorption member (20) has been combined in the space between the upper absorption member (18) and the horizontal absorption barrier (24). However, the void (122) can still expand when the object is worn, and provide space for receiving and guiding fluid. The particulate molecules in the particulate intermediate absorbent member (20) can be inhibited by fluid penetration wraps, such as a non-woven mesh or woven mesh (not shown), or the lower absorbent member (22) and the upper absorbent member (18) .
Without limitation, according to the structure of the absorbent article in the present invention, the further principles of its special composition will be described as follows.
Other designs and additional components
The absorbent article of the present invention may include a surface layer or a bottom layer or a surface layer plus a bottom layer, or other media that can increase the integrity of the object and the comfort of the surface on one side of the body. If the object contains other ingredients that can maintain the integrity of the product and block fluids, the object may not contain the surface layer and/or the bottom layer. For example, horizontal absorption barriers can be connected to by links such as adhesives, ultrasonic links, threads, fiber-fiber entanglements, hook and loop structures, embossing, thermal bonding, elastic ligaments, and methods well known in the industry. Central absorption zone, thereby fixing the central absorption zone. The absorbent barrier can also be connected to the lower absorbent member by a similar link to fix its position. Therefore, the limitation or complete effect provided by the surface layer and the bottom layer of the general absorbent article will be replaced by the horizontal absorption barrier attached to the other components of the article. The absorbent barrier can also cover the lower absorbent member to fix the lower absorbent member, and at the same time provide the function of blocking fluid around or below the member. The comfort, softness and dry feeling of the traditional surface layer can be replaced by appropriate absorbent materials. For example, a hydrophobic material is specially added to the surface of the absorbent material so that it can absorb fluids while maintaining the dry feeling of the skin.
The absorbent article of the present invention can be integrally formed with other functional materials (by adding other materials to the absorbent material or the barrier material) or added to the outside (for example, adding another layer of material), such as adding deodorant Ingredients such as soda ash, lime powder, cyclodextrin, chelating agents such as tetra-acetic acid, zeolite, activated silica and activated carbon granules, fabrics or fibers; super absorbent molecules and fibers; fluoropolymers; antimicrobial agents such as HEALTHSHIELD manufactured by BF Technologies of Beverly, Massachusetts <sup>TM</sup> Silver-containing zeolite and riclosan products, deacetylated chitin or chitin extracts; enzymes; ionized materials or enzyme inhibitors such as urinary inhibitors to prevent the formation of ammonia, as in October 6, 1993 European Patent Application No. 564,307-A1 "Methods for Preventing Skin Rash (Antiskin Rash Preparation)" filed by S. Levi in Japan; Lipase-inhibitors, for example, by KW Buckingham on March 24, 1993 European Patent Application No. 117,316 B2, and U.S. Patent No. 4,556,560 filed by KW Buckingham on December 3, 1985, "Disposable Absorbent Articles Containing Diaper Rash and Diaper Skin Disease Treatment and Preventive Agents Article IncorporatingAgents for the Treatment and Prophylaxis of DiaperRash and Diaper Dermatitis)". Petroleum, softeners such as lanolin or skin smoothing agents such as aloe vera extract or vitamin E can also be added to absorbent materials or absorb the exposed part of the central body side surface, surface layer or horizontal absorption barrier.
The absorption center of the present invention may contain superabsorbent molecules, such as superabsorbent molecules of about 5% to 90% by mass based on the dry mass, or 30% to 70% of superabsorbent molecules, or 10% to 50%. , Even 10% to 50% of super-absorbent molecules. Super-absorbent materials can also be added in the form of loose molecules to connect to hydrophilic fibers, super-absorbent fibers, or as a component of connecting materials or structural composites. The super absorbent material can also be in the form of foam.
In one of the compositions, the absorbent center contains a laminated or layered structure, and at least one layer contains super absorbent molecules or fibers. The super absorbent material can also be used as a link to fix the fiber composite in a compressed state. The super-absorbent molecules can also be stored in separate and separated pockets, and the part between the pockets does not contain super-absorbent molecules or contains a smaller concentration of super-absorbent molecules. The method of forming a pocket of molecular material between two layers of fiber material can be found in US Patent No. 5,030,314 filed by TBLang on July 9, 1991.
Super absorbent materials linked to cellulose fibers can also be used in the current invention. For example, a link can be used to immobilize superabsorbent molecules on cellulose fibers, as in the US Patent No. 5,547,745 proposed by Hansen et al. on August 20, 1996 and December 2, 1997 Disclosed in US Patent No. 5,693,411. In addition, super-absorbent molecules can also be stored in the air and flow through the adhesive, so that part of the molecular surface is covered or treated by the adhesive, and then bonded and connected to other absorbent materials. The flow of the adhesive can be It is a thermal fuse sprayed from a micro model or a spinning machine and retained in the air, or a sprayed thermal melt, solution or suspension fluid.
The absorption center of the central absorption zone and the absorbent material may comprise cellulose fibers stabilized by the connecting material. Similarly, the multi-layer structure of the lower absorbent member or the central absorbent area can be connected by the connecting material, or the connecting material can be connected to the surface layer and/or adjacent to the lower absorbent member or the bottom layer of the central absorbent area to enhance the cushioning Completeness. The connecting material can be swellable in contact with water or non-swellable in contact with water. In order to form the best absorbent article, the connecting material should preferably not be soluble in water when it is swellable in contact with water. In addition, the connecting material not only needs to provide good drying stability after the absorbent fiber structure is wetted by the fluid, but also needs to provide good wetting stability and wet tension. In order to make the wet tension of the connecting material still maintain a high space volume under the squeezing load, the connecting material is preferably non-swellable and insoluble in water, and the wet strength to dry strength ratio is about 10% or more, or It is 20%, 40% or more, and even 50% or more. The wet strength and dry strength ratios required by the connecting material that can swell in contact with water are also maintained in the same range.
For feminine care items, tape and side flaps can be added to the sides of absorbent items. Although the absorbent barrier can prevent fluid from leaking to the tape or side flap area, the absorbent barrier can still extend to the tape or the beginning of the side flap or longer. In one of the compositions, the absorbent barrier includes a transverse zone that extends sideways beyond the absorbent center to form side flaps or part of the tape. Similar areas can be part of the entire absorbent barrier or absorbent A second absorption barrier member other than the first absorption barrier member in the center.
For diapers and disposable training pants, various ingredients can be added to increase body fit and comfort. For example, the diaper of the present invention preferably additionally includes side flaps, elastic leg reflexes, elastic waistbands, and a fixing system including a group of fixing members and platform members. In order to prevent fluid from spilling, the object can also add fins, absorbing center space, protruding barriers or water storage areas, or other systems known in the industry to prevent fluid from spilling.
The entire absorbent article can also include extensible materials, including wavy or pre-modified absorbent materials that can extend in one or more plane directions, as well as an extensible surface layer and bottom layer, as well as optional extensible or elastic absorption barriers Things. On January 16, 1998, US Patent No. 5,766,213, issued by Hackman et al., discloses the design of a variety of extensible objects. What Hackman reveals is the use of corrugated absorbent materials and the longitudinal sides of the body pad with an accordion-shaped structure, which can be bent and changed. In the absorbent article of the present invention, the wavy part or the extendable part of the outer absorbent member can separate the bifurcation part of the absorbent article from the deformation of the rear part in use, so that the rear part of the absorbent article forms an inward V-shape To fit the buttocks, and at the same time, let the bifurcated part form a W shape to fit the user's air cavity.
The article can also add hydrophobic material on the side of the absorption center to further reduce side leakage. For example, hydrophobic fibers can be placed in a separate area, such as around the hydrophilic absorption center, to prevent leakage, as disclosed in US Patent No. 5,817,079 issued by Bergquist et al. on October 6, 1998 . A related method that is also applicable to the current invention is US Patent No. 4,015,604 filed by Csillag on April 5, 1977. Similarly, Canadian Patent No. 884,608 filed by Levesque on November 2, 1971 discloses that the edges of sanitary napkin products are treated with a hydrophobic material to prevent side leakage. The same as Levesque's design is that the absorbent layer in the edge area of the absorbent material achieves hydrophobic properties while maintaining the flow of gas and water vapor.
Alternatively, a fluid layer can be added between the surface layer and the absorption center or on the central absorption area to improve the absorption of fluids such as urine, and similar designs are more suitable for urine control absorbent articles such as diapers and training pants Or incontinence products. The fluid layer is generally non-absorbent or only the edges are absorbent (for example, the intrinsic absorption capacity is less than 0.9 or 0.3) high-bulk non-woven fabric, such as synthetic material polyethylene or polypropylene linked carded fabric, which is not The fluid will be retained, but the fluid will be dispersed in the absorption center of the lower layer. The basis weight of this fluid layer is preferably between 15gsm and 100gsm, and the porosity (space factor not occupied by solids) is higher than 96%. The sample fluid layer can be found in U.S. Patent No. 5,562,650 filed by Everett et al. on October 8, 1996 and U.S. Patent No. 5,429,629 filed by Latimer on July 4, 1995.
In addition, other methods can also be used to reduce the curling or folding of the pad or the sanitary napkin when squeezed laterally. The side flaps, flaps or tape extending from the object in the bifurcation area can be folded toward the edge of the wearer's clothing to form a better fit and leak-proof effect, and to reduce unnecessary curling of the object. The side wings and related structures can be seen in U.S. Patent No. 5,267,992 "shaped sanitary Napkin with Flaps" filed by KJ Van Tilburg on December 7, 1993, and by RMMcNair on August 25, 1981. The proposed US Patent No. 4,285,343 "Sanitary Napkin". In addition, it is also difficult to add elastic leg reflexes along the longitudinal sides of the article or the bending line of the absorbent article of the present invention.
In addition to using side wings and fixtures to stabilize and increase the degree of fit, the liner can also be shaped in advance, for example, the method disclosed in US Patent No. 5,545,156 proposed by DiPalma et al. on August 13, 1996. Therefore, the liner can be bent or shaped in advance to provide better body fit. In one of the compositions, the absorbent article is shaped in advance so that the center of the article and the cover is thicker, and the longitudinal sides and/or the front and rear ends are thinner. The shaping can be achieved by layering, forming absorption materials into different basis weight distributions, using shaping models to shape objects, and selectively calendering objects.
Bending line (discount and molding line)
Bending lines, including molding lines and discounts, can be presented in a variety of styles. In one of the compositions, the shape of the molding line is similar to a double-headed arrow and its arrow direction is opposite or ">-<", which is located on the longitudinal center line of the object between the discounts, and the longitudinal axis of the arrow is the same as that of the object. The longitudinal center line (vertical axis) is aligned. The similar plain line shape helps the central part of the absorption center between the outward "arrows" to bend upwards when the buckle produces downward bends. In addition, the available molding line shape for the upper absorbent member is a pair of outwardly concave curved lines intersecting at the midpoints, which are longitudinally aligned and symmetrical to the longitudinal center line of the bifurcation between the outer folds, and the same length as the folds. This kind of curved molding line is similar to the relative scratch or " <img file="TW506830B_D0001.tif" /> ", and the vertical axis of the scratch mark is aligned with the longitudinal centerline of the object. Similarly, the molding line in many compositions is a convex curve toward the longitudinal centerline of the object, and is usually located in the absorption center or central absorption zone.
Generally speaking, the molding line includes a central longitudinal portion and an outward spanning area spanning the distance between the shorter longitudinal central line and the longitudinal sides of the central absorption zone. Similarly, the molding line in various components may include a longitudinal component near the center line and another oblique component (inclined relative to the longitudinal center line of the object).
The molding line or discount of absorbent articles is generally formed in a similar manner by folding materials with a certain degree of softness. The materials include air-laid pads, fluff pulp pads, thin laminates, conformal material fabrics, or other materials. Fiber-polymer composite, or high-bulk non-woven fabric. The desired molding line or discount is best formed by embossing, pressing, or other methods to form a compact part. The method of forming a compact part can be seen by AYRomans-Hess et al on April 7, 1987. . The proposed US Patent No. 4,655,759. Other methods of forming lines include slitting, cutting, scoring, tearing, thermal bonding (heating to form a connection, such as hot-melt plastic material or heat-setting glue); hot extrusion (simultaneous heating and pressure, and the material It is best to use hot-melt plastic connecting material, heat-setting plastic or heat-setting glue); partial melting; ultrasonic connection; perforation; perforation-imprint; weaving; filling with glue, wax or hot-melt plastic; Other fluid columns are subjected to hydraulic cutting; pre-folding; folding; scoring; or removing the material by means of friction, peeling, picking, laser cutting, or extraction.
In some compositions, the discount and part of the molding line can be a series of perforations, nicks, cuts, tears, or cracks, as well as partial incomplete perforations, nicks, cuts, tears, or cracks. Increase its integrity. The crease lines and molding lines formed by slitting or compression zones are most suitable for use because they are easy to apply and effective.
The method used to form the molding line or the crease line can form different material line characteristics different from the surrounding materials, so as to form a fold on or near the processing line when the object is squeezed from the side. The material properties can also be modified to promote folding. The material properties include density, stiffness, basis weight, tensile strength, chemical composition (such as glue and fiber to fiber ratio), and internal integrity or bonding strength (such as z-direction bonding strength) . The intervals or spaces between the absorbing members can also form lines, and the material properties of the absorbing members are zero basis weight relative to the non-zero basis weight of the periphery.
Manufacturing method
Generally speaking, the automatic equipment production lines currently used for the production of sanitary napkins, diapers, etc. can produce the current inventions with minor modifications. The best is the combined system, in which each production line unit can be removed and replaced by other combined units without the need to reassemble the machine.
The components of the absorbent article of the present invention can be assembled and manufactured in a manner well known in the industry. Samples of high-speed machines and control systems for manufacturing absorbent articles can be found in U.S. Patent No. 5,235,515 filed by Ungplyakul et al. on August 10, 1993, and U.S. Patent No. 5,235,515 filed by Alikhan et al. on October 6, 1998. No. 5,817,394, and European Patent Application No. 873,274-A1 published on October 28, 1998.
The production line may include a hammer mill that is required when fluff pulp is used to make pulverized fibers or form rod-shaped absorbent materials, including air-laid fabrics, conformal, machine-softened pulp sheets, fabrics, etc. Similarly, the non-woven or adhesive film component of the absorbent article can also be in the form of a rod. The rod-shaped products can be loosened and cut into shapes by cutting, slitting or water jets, and applying online connection methods to specific parts such as spraying adhesive, contacting the cause of the waveguide rod or heating embossing components or other well-known in the industry In order to maintain the proper positional relationship between the components. The components can be moved from one operating place to another through a continuous conveyor belt, and can also be transferred to other places by means of vacuum shuttle guides, airflow, machine clamps, etc.
For example, it can be formed into an air-laid material, conformal, compressed fluff pulp, or a micro-strained pulp sheet fabric with a suitable width for the absorption center of the absorbent article. The absorbent material of a single rod can be slit into a wider strip of material for the lower absorbent member, and a narrower strip of material can be used as a single absorbent layer. The intermediate absorbent member is preferably formed from another source of material, such as adding another rod of absorbent material or adding a free-flowing absorbent material bag or cutting fluff pulp press cloth into a desired shape and specification. The lower absorbent member can use slitting, embossing rod, machine stamping, heat or ultrasonic welding that can compact the fabric along the crease line, machine folding equipment or folding machine, etc. to form longitudinal crease lines that are separated from each other. . The lower absorbent member moves along the machine direction and is connected to a moving barrier material fabric, such as embossed polyethylene film, filler or thin-layer fabric or perforated film, or contains separate openings and impenetrable sides Part of the impenetrable fabric. The blocking material is removed from the rod and guided to the upper lower absorbing member and contacted by the guide rod, the turning rod, the metal foil, the channel, the airflow column, the vacuum port or the guide plate, etc. An intermediate absorbent member such as a free-flowing particle bag, fluff pulp press cloth, etc. embedded in a fast water-tight space is formed, and it is connected to the absorbent barrier at specific intervals. The single absorbent layer is preferably removed from a rod of absorbent material and connected to it by moving along the direction of travel of the lower absorbent member, the absorbent barrier and the intermediate absorbent member, and this absorbent layer is preferably cut and then attached to it. The interval is placed in the center of the middle absorbent member, and finally forms an absorbent center with the horizontal absorbent barrier.
Then sandwich the absorption center between the bottom layer and the surface layer. In addition, a central protruding member can be added between the bottom layer and the horizontal absorption barrier. In addition, other absorption layers can be added to the absorption center.
The surface layer and the bottom layer can be cut at the same time to form the desired shape of the object. Side wings, adhesive tape strips, machine fixtures, reflexes, etc. can also be added to the object using methods well known in the industry.
The upper absorbent member may also be formed into a cup shape or a concave shape in advance before being placed on the central absorbent member. The method can be achieved by using heat and pressure to place an air-laid fabric on a surface suitable for shaping, or through cold calendering. The upper absorbent member does not necessarily have to form a continuous form, but is composed of independent molding units. The air-laid materials or wet-laid fibers are molded under the molding shape and are molded by heating or drying. Model and form a connection, complete the step of pre-sculpting the component. Then, before the surface layer is added to the absorption center, the individual units are transferred to the central absorption member and connected in a known manner.
sample
The samples of absorbent articles are made of the materials listed in Table 1: Table 1, Examples of basic materials used in the structure of absorbent articles
<tables><img file="TW506830B_D0002.tif" /></tables>
<tables><img file="TW506830B_D0003.tif" /></tables>
The samples are generally manufactured by the method of Figure 1 and Figure 2, and the exceptions are listed below the figure. If there is no other description, the materials are mainly described in the first table.
In Sample 1, the bottom layer was cut into a dog bone shape, approximately 84 mm wide and 238 mm long. The lower absorbent member is about 200gsm (grams per square meter) fluff pulp, a material layer with a density of 0.1 g/cc, which is cut into a curved rectangle with a width of 72 mm and a length of 225 mm, and is bonded and connected to the center of the bottom layer. Above the lower absorbent member can be an impenetrable absorption barrier or a permeable absorption barrier, which is cut into the same specifications as the bottom layer in various compositions and is bonded to it. Above the absorbent barrier is a central absorbent member, which is formed of fluff pulp with a density of about 0.14 g/cc with 656 gsm embossed cloth, and is not embossed and cut into an ellipse with a length of 82 mm and a width of 38 mm. The upper absorbent member is an oval with a basis weight of 228 gsm, a width of 46 mm and a length of 212 mm. The surface layer is cut to the same specifications as the bottom layer, and is bonded to the upper absorbent member and faces the absorbent barrier. The surface layer is connected to the bottom layer by the adhesive on both sides of the horizontal absorption barrier. On one side of the bottom garment, two longitudinal adhesive strips with a length of 192 mm and a width of 15 mm are formed, which are aligned with the longitudinal center line and separated by 10 mm. The longitudinal ends of the bottom layer can further form a horizontal adhesive strip with a length of 15 mm and a width of 100 mm, which is on the round protruding part of the dog bone shape. Then add removable paper to the adhesive material.
In sample 2, the oval press cloth was replaced by a compact air-laid fabric with a basis weight of 175 gsm, a density of 0.1 g/cc and cut into 110 mm by 70 mm specifications to form an "e"-shaped folding zone. Fold along two crease lines perpendicular to the long axis direction and maintain a certain distance between each other to form an "e" fold with a width of about 40 mm and a length of about 70 mm. The crease lines forming the fold must be aligned with the longitudinal direction of the object, so that the e-shape of the central protruding member can be observed in the transverse section (as shown in Figure 3).
However, it is worth noting that the aforementioned samples are only for illustrative purposes, not to limit the scope of the present invention. Although the article only describes the composition of a few current inventions in detail, it should be noted that making appropriate improvements to the sample composition does not deviate from the technology and advantages of current inventions and innovations. Therefore, such improvements are still included in the scope of the current invention, and will be stated in the scope of the following patent applications. In addition, it is worth noting that many compositions may not achieve all the advantages of partial composition such as the best composition, but the lack of partial advantages does not necessarily exclude such composition from the scope of the current invention.
Symbol description of main components
10. . . article object
12. . . topsheet
14. . . backsheet bottom layer
15. . . absorbent core
16. . . central absorbent section
18. . . upper absorbent member upper absorbent member
20. . . middle absorbent member
twenty two. . . lower absorbent member
twenty four. . . wicking barrier
28. . . crease line
29. . . longitudinal centerline longitudinal centerline
30. . . medial hump central protrusion
34. . . ledge
36. . . apertures
38. . . outer absorbent region
40. . . inner absorbent region
48. . . crotch region bifurcation
50. . . central rising member
52'. . . longitudinal sides
52"...longitudinal sides
54. . . upper portion
56. . . first lower portion first lower portion
58. . . second lower portion second lower portion
60. . . end
62. . . end
64. . . overlapping region
70. . . adhesive stripes
72. . . shaping line shaping line
74. . . central longitudinal line
76. . . spanning line
78. . . longitudinal sides
80. . . crease line
82. . . central hinge
84. . . arrow arrow
86. . . arrow arrow
88. . . resilient web resilient web
90. . . end
92. . . underlying web
94. . . bond area
96. . . central portion
98. . . distance
100. . . semi-elliptical holes
102. . . slot
110. . . pockets
112. . . pockets
114. . . pockets
116. . . projection
118. . . longitudinal end
122. . . void space
13 members in 11 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 09408498 | United States of America | – | |
| 40849899 | United States of America | A | |
| 19990408498 | – | – | – |
| US19990408498 | – | – | – |
Members13
| Document | Office | Kind | |
|---|---|---|---|
| CA2386011A1 | Canada | A1 | |
| WO0124754A1 | World Intellectual Property Organization (WIPO) | A1 | |
| AU7604800A | Australia | A | |
| KR20020033211A | Republic of Korea | A | |
| EP1237520A1 | European Patent Office (EPO) | A1 | |
| TW506830BThis record | Taiwan Province of China | B | |
| US6486379B1 | United States of America | B1 | |
| US2003050617A1 | United States of America | A1 | |
| CN1420752A | China | A | |
| JP2003533236A | Japan | A | |
| RU2002111570A | Russian Federation | A | |
| US6689935B2 | United States of America | B2 | |
| BR0014404A | Brazil | A |
Numbers
- Publication
- 506830
- Publication, DOCDB
- 506830
- Publication, EPODOC
- TW506830B
- Application
- 89120343
- Application, DOCDB
- 89120343
- Application, EPODOC
- TW200089120343
Titles4
- Chinese
- 具有中央壓布以及變形控制的吸收性物件及其製造方法
- English
- ABSORBENT ARTICLE WITHCENTRAL PLEDGET ANDDEFORMATION CONTROLAS WELL AS THE METHODFOR PRODUCING THESAME
- Unlabeled
- 具有中央壓布以及變形控制的吸收性物件及其製造方法
- Unlabeled
- Absorbent article with central press cloth and deformation control and manufacturing method thereof
Classification
- CPC, 8
- A61F13/47218
- A61F13/4704
- A61F13/47263
- A61F13/5323
- A61F13/535
- A61F13/53704
- A61F13/53743
- A61F2013/53782
- IPC, 5
- A61F13 53
- A61F5 44
- A61F13 15
- A61F13 49
- A61F13 494