Conformable disposable diaper having reinforced portions

[Detailed Description of the Invention]

as for a usage Well done. bundle, the thing of taking-in Re of a bundle glue intermediary of cloth and several sorts of structures has attained osmosis in a market fairly. the sheet which is flat in a rectangle as for many of shape of a usage Well done. bundle, and is fitted by the infantile bodily shape from a flat state -- intermediary To have [ from ]. It may have a geometric fold, in order that a bundle may prepare a form in a certain case. The serious fault of the conventional usage Well done. bundle is a problem of the intensity of the bundle in the part fixed to the surroundings of the problem of the conformity to the surroundings of an infantile leg and the waist, and the infantile body, and is Oh. For a You intermediary, economical efficiency is the first importance on the character of a product at solution of these problems of a usage Well done. bundle. The problem of conformity is simply and easily solvable by only making the portion of the edge of a bundle into elasticity, in order for an infantile leg to turn, and to reach or to improve the surrounding comfortable nature of the waist. The edge for strengthening a bundle in the holding part and the problem of the reinforcement which ends are solved easily and comparatively simply by putting the layer of material on those parts further. However, such a means increases substantially the final cost of the increase of cost, therefore the bundle of the charge of a material used for increase and a bundle in the complexity on bundle manufacture. In order to improve conformity, the usage Well done. bundle which has a contractile side flap which attaches gathers to the side edge of a bundle appeared in the market recently. It is similar to the conventional panties of moisture impermeability, and the conformity around a wearer's leg is improved, however such a bundle has an in addition high cost of production. This common type of bundle is indicated in the U.S. Pat. No. 3860003 item. In addition, there is a patent of a large number which indicated a means to have made the pelvic band of a usage Well done. bundle into elasticity, and to improve the conformity to a wearer's waist. The example is a U.S. Pat. No. 3995637 item and No. 3995640. In order to make various portions of clothes into tensility, the various methods of including an elastic member in clothes are well known in this technical field. The elasticity which those ribbons are built into clothes in the inelastic state including use of the film ribbon of heat contraction nature or heat recovery nature, and such a method is heat-treated after that, and can give elasticity, or already exists in a ribbon is strengthened. Generally such art is indicated to a U.S. Pat. No. 3245407 item and No. 3639917. The usage Well done. bundle was originally stopped by the pin. However, it is stopped with the fastener thru/or tab of pressure-sensitive adhesive tape these days. It is a portion of a corner that absorbs stress when both cases receive the stress for fixing a bundle to the infantile body and a small child A lump them in the first place. An adhesion tab is usually attached to the side edge of a bundle in the end, and is fixed to the comparatively thin back reliance sheet of a bundle. Since stress is very strong in these parts, the part of These is indicated, various means, for example, U.S. Pat. No. 3867940 item, The back reliance sheet of an adhesion place is reinforced by thickening or other means as Scrim (lining cloth cloth) is pasted up on these parts or it is shown in the U.S. Pat. No. 3738871 item. Also in which case, it becomes a problem in a high-speed manufacturing process to coincide an adhesion position. With the improved conformity, it was not in these artificers whether new it is improved [ which has a portion of the corner strengthened for the attachment nature improved from the surroundings of the waist of the small child of a bundle ] up, but they invented the After bundle. This new bundle can be manufactured economically, the manufacture operation which should be added is the minimum, and ends, and can also manufacture good productivity easily with an intermediary high-speed manufacture device. According to the present invention, these artificers' improved new bundle has at least one edge (margin) which has a ribbon member of elasticity in itself [ long ]. The ribbon member gives the strengthened inelastic part single into the portion of the corner of a bundle relatively to a marginal central portion for an elastic zone. In 1 suitable example mode of the bundle of the present invention, the ribbon member is provided in each side edge of the longitudinal direction of a bundle. In the another embodiment, one or both of the edge of the transverse direction of a bundle are provided with Along and also a ribbon member. Suitably, the width of a ribbon member is a strip (beltlike thing) of the film beyond 1/2 inch (1.27 cm) 1 inch (2.54 cm) thru/or it. in order that a strip may maintain the edge of a bundle at an elastic state -- the central portion of a bundle -- a back reliance sheet -- and -- or it adheres to a table intermittently (intermittent). However, it adheres to the portion of the corner of a bundle extensively (substantially the whole surface [ Namely, an end ] cotton intermediary) suitably, originally the end of a Oh strip is substantially made inelasticity by it with elasticity, and a strip strengthens a bundle in that the end of a strip is continuous, and such a part. In a thermoplastic film strip, an end is effectively made into inelasticity by adding energies, such as heat or an ultrasonic wave, to a desired adhesion part. It remains without checking elasticity in the part which a film does not paste up. It is comparatively easy to paste up on To fix the length which the film ribbon of elasticity followed and which was extended beforehand, and to paste up the selected part on the addressing sheet to the standard impermeable reverse side of a bundle during manufacture of a bundle. Easy art is pasting up the ribbon of the heat contraction film which becomes elasticity and it contracts by heating to another temperature defined beforehand on the edge of a bundle similarly. Such a film ribbon adheres to the back reliance sheet of the bundle of Gradually impermeableness on the edge of a bundle in the end, while being inelasticity. It is heat-treated (for example, heat air injection), and contracts by it, and the central portion of a ribbon gains elasticity. An above-mentioned means brings about simultaneously the improved conformity to the body of the small child of a bundle, and the corner where it was strengthened for the improved stable wear nature. Next, with reference to drawings, the present invention is explained concretely. In one suitable embodiment of the usage Well done. bundle of the present invention, it is a desired part that an elastic means and a strengthening means are begun and cannot loosen with elasticity, It is a member which is repealed in the elasticity in the part concerned by heat-pasting up or ultrasonic pasting up the part on the back reliance sheet or the surface of a bundle. Many thermoplastic films which have this character are known well, and are explained to details below. the word the "elasticity" used here is elongated till less than 10% of breakdown points -- the following formula -- therefore, when calculated, it is used about the sheet, film, and ribbon which have at least 90% of recuperative strength. It corrects rate-of-recovery (%) =Le-Lt/Le-Lox100. Length which Lo= sample begins Le = fully elongated length In the part of the bundle for which it is used as a strengthening means, the member by which length use of the sample measured 3 seconds after releasing from Lt= extension is carried out must have at least 1 / a width of 4 inches (0.64 cm). The full length of this member must have the width more than at least 1 / 4 inches (0.64 cm) preferably 1/2 inch (1.27 cm) thru/or 1 inch (2.54 cm). The thickness of a member is about 1 / 2 mil (0.0127 mm) thru/or about 10 mil (0.254 mm), and preferably is for 1/2 mil (0.0127 mm) and 5 mil (0.127 mm). 50%, an elastic means is extension and has at least about 90%, preferably 100% of recuperative strength immediately preferably in 3 seconds. For the ease of extension, the elastic modulus of an elastic means is 50% extension, and it is about 2000 pounds (141kg/(cm))/square inch.²It should not exceed. An elastic modulus is preferred and it is 2000 pounds (141kg/(cm))/square inch.²They are a circumference of lower, more preferably about 20 psi (1.4kg/(cm)) substantially.²from -- about 200 psi (14.1kg/(cm))²It is. an elastic means is a request -- the edges on both sides of the longitudinal direction of a usage Well done. bundle -- and -- or Gradually use is carried out at both the front tip of a bundle, and both [ one or ]. If Drawing 1 is referred to, usage Well done. bundle 20 which materializes the present invention has side edges 21 and 22 of a longitudinal direction. Central portions 23 and 24 of edges on both sides suit well with an infantile peach with elasticity. In the both ends of the side edge of a longitudinal direction, inelastic corners 25, 26, 27, and 28 are located. The elastic means of the edges on both sides of a longitudinal direction is an elastic film ribbon with comparatively thin broad width. It loosens, in order that a film ribbon may strengthen a corner in the both ends of a ribbon, and the elasticity is removed. The back reliance layer made with the sheet, further the first outer layer, i.e., moisture impermeableness, [ bundle ] The front reliance sheet placed on rectangular absorption Ash (batt) and absorptive Ash generally made by the second outer layer, i.e., the sheet of moisture impermeableness, which were located by the relation placed on this back reliance layer is included. The bundle is provided with pressure-sensitive tape tabs 32 and 33 in order to attach to the infantile body. It is fixed to the strengthening field described below in piles, and an adhesive tape tab further strengthens the intensity of this field that absorbs the great portion of stress at the time of use. The elastic member is parallel to the side edge of the longitudinal direction of Ash. When the end is processed so that elasticity may be removed, and a bundle can loosen, the central part of edges on both sides contracts with elasticity, but although four corners are inelasticity, they are strengthened with an addition film material. Each component of the usage Well done. bundle is shown in Drawing 2. Absorption Ash 35 piles up on back reliance sheet 36 of a thermoplastic film, and is fixed to it by line 37 of a series of adhesives to which the back reliance sheet adhered. When it sets in the center substantially [ absorption Ash has an area smaller than a back reliance sheet, and / a back reliance sheet ], there is a space from both the edges and both ends of a longitudinal direction of a bundle. Although side reinforcement of the absorptive Ash is carried out by members 38 and 39 in the side edge of a longitudinal direction, this is fixed to a back reliance sheet by adhesives, ultrasonic adhesion, and other suitable means. Addressing sheet 40 to a moisture impermeable table is piled up on absorption Ash, and in area, it is larger than Ash, and is fixed to a back reliance sheet in the portion of the end which the line of adhesives usually exposed. However, as long as it is a request, it may be fixed by other means. As long as an elastic film member is a request, it may be fixed to a back reliance sheet, a front reliance sheet, or its both. Only central portions 41 and 42 of an elastic film member should be having elasticity left behind in manufacture of a bundle. This is attained, when intermittent or pasting a pattern by ultrasonic adhesion. End 43 is processed by heat, an ultrasonic wave, etc., and you are made to lose elasticity in those parts. Although Drawing 3 is similar with having been shown in Drawing 1, the elastic means which is merely in the backside of the waist of a bundle, i.e., end 45, and a strengthening means show usage Well done. bundle 44 which the improved conformity around the infantile waist is made to be given. The elastic means and strengthening means of this bundle are the film ribbon processed as mentioned above so that it might be similar with what was described in relation to Drawing 1 and might have the same operation. That is, although central portion 46 of an end is elasticity, two back corners 47 and 48 are strengthened. Although Drawing 4 is similar with the usage Well done. bundle of Drawing 1st [ the ] and 3, it has the four film ribbon member in which an edge, i.e., side edges 52 and 53 of two longitudinal directions, front tips 54, and all the trailing edges 55 were altogether inserted into it, and usage Well done. bundle 51 in which the central portion is elasticity is merely shown. Four corners 56, 57, 58, and 59 are strengthened with this embodiment by piling up the end where each film ribbon member loosened at two-fold Good. Adhesive tape tab 72 made to adhere to back reliance sheet 62 is made to adhere also to front reliance member 63 again so that it may be seen in Drawing 5 which is another sectional view of the portion of the corner of a bundle. The part of the tape tab is strengthened by inelastic strengthening portion 69 of member 68. narrow between front reliance sheet 82 which it uses in the embodiment shown in Drawing 6, and Well done. bundle 80 has a flank cut of a curve similarly, and has the same cut, and back reliance sheet 83 -- it has Absorbable asbestos 81. Line 84 of adhesives serves to fix a front reliance sheet to a back reliance sheet to Ash. Generally large elastic ribbon 85 is located by the side edge of a linear bundle. It is extended for the full length of the side edge of a bundle, it is intermittently fixed to a back reliance sheet and a front reliance sheet in the central part 86, and an elastic ribbon member provides desired elasticity. In lateral parts 87 and 88, an elastic ribbon loosens and is made into inelasticity. Projection portions 89 and 90 of absorption Ash increase the intermediary Heavy to full length and also absorption capacity of the loose ribbon. Tape tabs 91 and 92 overlap with the end at which the loose elastic member was strengthened, and are strengthened by it. A tab provides a means to fix a bundle to the infantile body. In the embodiment shown in Drawing 7, usage Well done. bundle 100 of the present invention becomes an intermediary To have thing which has narrow crotch 103 of a Then bundle from front reliance layer 104 by absorption A pad 102 of addressing member 101 to the impermeable reverse side, and a hourglass pattern. In this form, a front reliance layer and the addressing member to the impermeable reverse side form portion 105,106 as a side edge part. a side edge -- the portion of these does not include absorption Ash material. This reduces the umbrella of the material between infantile legs. In each side edge of a bundle, elastic member 109 which has both-ends portion 111,112 which loosened to central portion 110 and the object for strengthening of Then elasticity by the elastic member, and was made into inelasticity between the addressing layer to the impermeable reverse side and the penetrable front reliance layer is inserted. As for this bundle, that waist portion has an absorber of double width, i.e., a hourglass pattern, from a crotch part. In the waist back of a bundle, there is adhesive tape tab 113,114 beforehand pasted up on the portion of the back reliance member, and it is strengthened. In the embodiment shown in Drawing 8, usage Well done. bundle 120 has a narrower field of absorption Ash 122 pasted up on it with the image of the adhesives applied to rectangular addressing member 121 to the impermeable reverse side and back reliance member. There is surface member 124 which develops with a back reliance member and forms side edge 125,126 and edge 127,128 of a longitudinal direction in the surface of absorption Ash. In waist back edge 127, member 129 has pasted up between the back reliance layer and the surface coat. In the central part 130, this member is elasticity and inelasticity in both ends 131,132. The same elastic member may be inserted also in front waist 128 of a bundle. A back reliance member is pasted in the strengthening portion, and adhesive tape tab 133,134 is used for wear to the surroundings of the infantile body. The elastic member which loses the elasticity by heat adhesion suitable for using it for the bundle considered here, It is a thermoplastic (unvulcanized) constituent which is built using an elastomer component and the denaturing agent which are the arbitrary thermoplasticity polymerization things which only that of low-molecular quantity is carried out comparatively, and is a solid at normal temperature, and which can live together and which is not hardened. The example of an elastomer component suitable for the object of the present invention consists of at least a thermoplastic block of an end piece, and some non-ends, i.e., a middle elastomer polymer block. This common type of block co-polymer is built using a gradual polymerization initiator, If you do, and an organic lithium compound. Such block polymerization art is well known in this technical field. A [ being a line or that an elastic ingredient is radiate (radial) ]¹-B-A²A block co-polymer or it, and simple A¹-It is a mixture of B block co-polymers, and they are Then and A.¹A²it being the same in Is, or being a different exception, and representing a thermoplastic polymer block like the poly (vinyl Allen) block -- B -- conjugate diene -- or low-grade (namely, C)₁-C₄An elastomer polymer block like Al Ken is represented. A denaturing agent ingredient exists in about 0 thru/or the quantity of about 200 weight sections to 100 weight sections of elastomer components in a constituent by low-molecular quantity thermoplasticity polymer of average molecular weight about 500~7500. The suitable thermoplastic film constituent for an elastic film member is general shape as the basic component. A¹-B-A²A Which intermediary, A¹A²B contains the elastomer component which contains the line block co-polymer which is the same meaning, and which is not hardened with having stated previously. In these block co-polymers, it Induction from styrene and a styrene family object A blocks, and B blocks is guided by conjugate diene and low-grade Al Ken. The thermoplastic polymer denaturing agent can coexist with an elastomer component, and mainly meets with the thermoplastic end block of an above-mentioned non-hardenability block co-polymer (associate). a thermoplastic polymer denaturing agent -- this -- better -- To has about 1000 thru/or about 3000 molecular weight, and exists at about 80 thru/or about 200-weight section rate to 100 weight sections of elastomer components in a film constituent. Suitable A¹-B-A²A block co-polymer has A blocks which is guided from styrene and a styrene family object, namely, polymerizes or copolymerizes, and B blocks guided by low-grade Al Ken like the conjugate diene or ethylene like isoprene and butadiene, and butylene. Other monomers of few rates can be added to a block co-polymer. Each A blocks have an average molecular weight of at least about 6000, preferably about 8000~30000, and it closes about 5 to 50% of the weight preferably of a block co-polymer and about 10 to 30 % of the weight A-block. Line A¹-B-A²The average molecular weight of B blocks of block polymer is within the limits of about 45000 thru/or 180000 preferably, and linear copolymer's own it is within the limits of about 75000 thru/or 200000. Radiate A¹-B-A²Preferably the ranges of the average molecular weight of a block co-polymer are about 125000 thru/or 400000. The term a "line block co-polymer" is branching A.¹-B-A²A copolymer and not branched A¹-B-A²A copolymer is included. Radiate A useful to manufacture of the elastic member of the bundle of the present invention¹-B-A²A copolymer is a thing of the type indicated in U.S. Pat. No. 3281383 items, such as Zelinski, and is in agreement with the following general formula. That is, Then and A are the thermoplastic blocks which polymerize from styrene or a styrene homopolymer in (A-B) nX, B is an elastomer block guided by the above conjugate diene or low-grade Al Ken, About 2 thru/or 4 functional groups X is indicated to be to U.S. Pat. No. 3281383 No., Or it is an organic or inorganic joint molecule which has many functional groups rather than indicated in the report entitled "New Rubber is Backed by Stars" indicated to 35 pages of the June 11, 1975 item of Chemical Week. n used upwards is a number equivalent to the functional group of X. In the point which is thermoplasticity highly, shows the comparatively sharp melting point and can carry out hot shaping although it is an elastomer, suitable elastic film members are rubber and different intermediary To have. Elastic film members are a comparatively low heat adhesion temperature and the temperature which generally does not exceed abbreviation 350 *F (177degreeC), and can form permanent heat adhesion in a base like a nonwoven fabric. It is elasticity highly, a film member has a comparatively low rate of rubber elasticity, namely, are 50% of extension to an elastic rate of recovery of at least 75%, preferably at least about 80%, and 50% extension in at least 1 direction, and is about 2000 psi (141kg/(cm)).²it does not exceed -- desirable -- about 20 psi (1.4kg/(cm))²Or about 200 psi (14.1kg/(cm))²The rate of 50% rubber elasticity of the range is shown. A film member is very flexible again, shows about one or less Gurley fearfulness (Gurley stiffness) by film thickness at 1 mil (0.0254 mm), and has at least about 300%, preferably at least about 400% of fracture growth in the at least 1 direction at normal temperature. In an embodiment with the usage Well done. bundle of the present invention, an elastic means and a strengthening means are one member which is made into elasticity and can give the elastic characteristic by giving the energy which makes it contract it of heat or other forms. A part of this member is processed such, and it is made into an elastic means, and on the other hand, other portions are not processed but let them be strengthening means. To some extent, for Arrangement, it may be carried out, and when carrying out heat contraction, the polyolefin film made into elasticity may be sufficient as the heat contraction film used for the elastic means of the usage Well done. bundle of the present invention. Usually, in order to give heat contraction elasticity, the suitable art for carrying out for [ of the polyethylene film ] Arrangement is irradiation suggested to British JP,866820,B. A thing useful as a heat contraction elastic member is a copolymer of ethylene, the copolymer of acetic acid vinyl and ethylene, and ethyl acrylate, etc. Manufacture of such a copolymer is indicated by a U.S. Pat. No. 2200429 item and No. 2953551. After a copolymer is formed and being fabricated by the film, as indicated to British JP,866820,B which made reference previously, those suitable for Arrangement can be given. various types of the material used for the front reliance sheet of a bundle -- 75% thru/or about 98% -- wood pulp is not carried out -- it is -- it needs -- it does not carry out cellulose short -- an object for textiles like the Ruddy rayon which is and in which the remainder is comparatively indicated in U.S. Pat. No. 3633348 items, such as Liloia, -- long -- it does not carry out -- The squid and others -- . The front reliance materials of a nonwoven fabric suitable for the present invention carrying out usage Well done. bundle use are about 0.5 thru/or 5 ozs (0.0017~0.017g/(cm))/square yard.²Generally the nonwoven fabric weight of the range and less than 0.15 g/c.c. have the density of the range of about 0.05 thru/or 0.1 g/c.c. About 0.15 oz (0.00051g/(cm))/square yard²The baked strength of the front reliance sheet for the cloth foil of weight is at least 0.15 pound (0.068 kg) about 1 inch (2.54 cm) in width of the direction of machinery. Such cloth foil has good growth, bulky, softness, and the lappet characteristic. the art in which the front reliance sheet was indicated to U.S. Pat. No. 2862251 No., No. 3081514, and No. 3081515 -- therefore, it can also be built with the nonwoven fabric which made the hole formed. If it says simply, such cloth foil will be a thing of hole vacancy (reticulated) structure, and the group which is not carried out and which is will be made to re-arrange it from a portion with lower density of the circumference by making it pass fluid from a start nonwoven web Then and in it. it does not carry out -- it does not carry out into Group -- it is -- it is caught, and you can suit and can be made to arrange as well known in this technical field by various patterns these -- it does not carry out -- it is -- nature is not carried out -- are and it does not compound -- it can be and can build with those mixtures. a polyester type -- not carrying out -- Stomach -- the typical front reliance sheet built -- about 0.75 oz (0.002535g/(cm))/square yard²It has weight. It may be made for a front reliance sheet to become the inside same size as the addressing sheet to the chip box intermediary reverse side as it may have the same size as a back reliance sheet, i.e., the same circumference, or it is larger than a back reliance sheet and the side edge is shown in Drawing 3 of the U.S. Pat. No. 3612055 item. In the case of the latter, an elastic member may be fixed on the side edge folded inside the front reliance sheet. the hole in which material without a hole [ like an isotropic nonwoven fabric ] whose front reliance sheet is also has desired moisture impermeableness -- the polyolefin of a vacancy or the film of polyester can also be formed. In all the above-mentioned front reliance sheets, the material should be hydrophobicity comparatively, in order to delay the sucking operation in the inside of a front reliance sheet. a desired form -- however, Ash thru/or the panel of water absorption nature smaller than a front reliance sheet and a back reliance sheet -- instruction of U.S. Pat. No. 3612055 items, such as Mesek, -- therefore, it can form. Opaque (opaque) polyolefin, for example, polyethylene of 0.001-inch (0.0254 mm) thickness, may be sufficient as a back reliance material suitable for the bundle materialized in the present invention. Other materials suitable for this object are polyethylene terephthalate of about 0.0005-inch (0.0127 mm) thickness. The probably easiest method for pasting up an elastic film member on a Gradually film and a front reliance sheet in the side edge part of the longitudinal direction of a bundle is ultrasonic fusion welding, That is, it is welding various layers by fusion using an ultrasonic fusion-welding device which is put on the market from Branson Sonic Power Company. In order to carry out ultrasonic fusion welding of this member at a bundle, there are two possible methods. In the first method, ultrasonic adhesion of the central portion of an elastic film is carried out at the intermittent pattern, and, as for an end, thermal melting arrival of the whole field is carried out. In the second method, ultrasonic fusion is carried out by the high energy added in order that the whole film member may fuse the whole region to the portion of the end. In both art, in the end, a film is heated until it almost dissolves, and it loses the memory substantially and becomes inelasticity in the portion. an elastic member -- with a request -- a back reliance sheet -- and -- or ultrasonic fusion welding is carried out at a front reliance sheet. An above-mentioned elastic film member is a form of the member which loses the elasticity, when adding heat or other energies, but the present invention is not limited only to it, and when adding heat or other energies, it can also use the member which becomes elasticity. When heated, the film which contracts and becomes elasticity is known well, and it can be used for manufacturing the bundle of the present invention. Such a heat contraction film member is inserted in the edge of a bundle, and a part of member may paste it up on a bundle with adhesives. Other portions of a member are intermittently fixed to a bundle. If heat or other energies are added to the portion fixed intermittently, the portion will contract and it will become elasticity. The portion pasted up with adhesives remains on that occasion, and acts that a bundle should be strengthened with the portion. The upper description and a drawing are exemplary and are not restrictive. Other improvement change is possible in the technical thought of the present invention.

[Brief Description of the Drawings]

They are whether Drawing 1 materializes the present invention up and a perspective view which is not but illustrates a After bundle. Drawing 2 is an exploded perspective view showing the relative position of the member of a bundle when manufacturing the bundle drawn on Drawing 1. Drawing 3 is a perspective view showing other embodiments of the usage Well done. bundle of the present invention. Drawing 4 is a perspective view showing the embodiment of further others of the usage Well done. bundle of the present invention. Drawing 5 is an expanded sectional view in the end in one embodiment of the usage Well done. bundle of the present invention. Drawing 6 is a top view decomposing and showing another embodiment of the usage Well done. bundle of the present invention in order to show the details of the inside. Drawing 7 is a top view decomposing and showing another embodiment of the usage Well done. bundle of the present invention in order to show the details of the inside. Drawing 8 is a figure decomposing and showing another embodiment of the usage Well done. bundle of the present invention in order to show the details of the inside.