JPH09173381A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the fitting characteristic of a groin part and to prevent the leakage of urine and excretion by providing both side parts of a first absorber in the central region in the longitudinal direction of an absorptive article with second absorbers and disposing three-dimensional gathers in both side parts in the longitudinal direction on the side of the second absorbers opposite to the first absorber. SOLUTION: The absorber 3 is arranged between a liquid permeable front surface sheet 1 and a liquid impermeable forming surface sheet. Lateral flaps are formed on the outer side in both side parts of the transverse direction of the absorber 3. The absorber 3 is formed narrow with the first absorber 4 existing in the central part in the groin part. The second absorbers 5 are arranged in both side parts of the narrowed part thereof and the three-dimensional gathers formed by adhering three-dimensional gather elastic materials in a stretched state are disposed along both side parts of the throw-away diaper. Further, elastic materials 7 around the legs are disposed in an expanded state and elastic materials 8 around the waist are disposed in an expanded state in the rear surface flap parts. Fastening tapes 10 are disposed in order to easily attach and detach the throw-away diaper to and from a wearing person.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article, and more specifically, to a second absorbent body provided with a second absorbent body on both sides of a first absorbent body arranged in a central region in the longitudinal direction of the absorbent article. By disposing three-dimensional gathers on both sides in the longitudinal direction on the side opposite to the first absorbent body, the second absorbent body rises up to the side portions of the first absorbent body together with the three-dimensional gathers, and substantially the crotch weir. The present invention relates to an absorbent article that is suitably used by increasing the wearability of the wearer's crotch and increasing the fit of the wearer's crotch and preventing the flow and leakage of urine and excrement without lowering the absorbency of the crotch.

[0002]

2. Description of the Related Art Conventionally, in a disposable absorbent article for treating excretions such as urine, menstrual blood, stool, etc., an absorbent body may be simply rectangular or have a narrow crotch width. , The former has a low fit at the crotch and the latter has a good fit, but the absorption capacity is low due to the narrow width of the absorber at the crotch, and the excrement is absorbed in the part where the absorber does not exist This has the disadvantage of leaking from the crotch part.

In order to solve these drawbacks, there has been disclosed a structure in which a cut is made in the crotch portion of the absorber and turned back to the central portion to increase the absorption capacity at the central portion (Japanese Patent Laid-Open No. 57-15757).
-71402, JP-A-57-77302,
JP-A-57-77303). These are diapers having a so-called hourglass-shaped absorber, in which the inseam area is formed in a thicker layer than the other areas, thereby trying to increase the absorption capacity of the inseam area and prevent excrement leakage. However, as in the previous period, even if the absorption capacity at the center was increased, the absorber at the crotch was substantially narrower, and excrement in the portion where the absorber did not exist was not absorbed. The drawback of leaking from is inevitable. In addition, even if the surface area of the upper surface of the absorber at the crotch is small and the absorbing power of the absorber is large, there is a problem that the absorption rate of excrement is not sufficient, and unabsorbed excrement leaks.

[0004] In order to improve the fit at the crotch and to eliminate the drawbacks of reduced absorption due to the narrow crotch,
A method has been disclosed in which an absorbent article is provided with a concave embossed wire or a bending resistance is changed to enhance the fit without lowering the absorptivity of the crotch portion by bending the absorbent article (Japanese Patent Laid-Open No. Hei 10-260,837). No. 1-162801,
JP-A-2-11138, JP-A-2-11139, and JP-A-4-341261. However, these have the drawback that they may not actually bend as designed and may cause leakage at the crotch, since the absorber is bent only by forming a bent portion on a single absorber. I have.

[0005] In order to reliably bend the absorber at the crotch portion, a method has been disclosed in which the longitudinal side portion of the crotch portion of the absorbent article is folded inward to be joined and fixed (Japanese Unexamined Patent Application Publication No. Hei 4 (1994)).
-51952). However, in this method, since the single absorbent body is bent at the crotch portion, the absorbent body itself is difficult to bend, and the absorbent body is bulky at the crotch portion, which causes a discomfort to the wearer.

[0006] As another method for improving the fit of the crotch portion and reducing the absorption power due to the narrowing of the crotch portion, there is provided a three-dimensional gather provided along the longitudinal direction of the absorbent article. There is disclosed a method in which an absorber is provided therein, or a second absorber which becomes a weir rising from a back sheet on both sides of the first absorber (Japanese Utility Model Laid-Open No. 5-9).
525, JP-A-3-123553, and JP-A-2-96120). These provide an absorbent article that enhances the fit of the crotch without lowering the absorption capacity of the crotch by further arranging the absorber on both sides even if the absorber at the crotch is narrowed. doing. However, the three-dimensional gather having the absorber disposed therein has a problem that the stretchable elastic body adhered in the stretched state is unlikely to contract and the three-dimensional gather itself is hard to stand up. In addition, there is a problem that an absorbent body having a sufficient absorbing power cannot be arranged in the three-dimensional gather which serves as a weir having an appropriate height.

Further, in order to eliminate these drawbacks,
The crotch part of the first absorbent body is made narrower, and the second absorbent body is arranged on both sides of the crotch part so that the excrement that the first absorbent body cannot completely absorb is contacted with the inner side of the crotch of the wearer. A method for absorption by the body has been disclosed (JP-A-4-67427). However, according to this method, although the fit of the crotch is high, three-dimensional gathers are not arranged, and there is no space between the absorbent article and the wearer at the crotch, so that the excrement is reduced to the first absorbent body. When excreted at a rate higher than the absorption rate, even if it is within the absorption capacity of the first absorber, it flows into the second absorber without being absorbed, and the second absorber leaks without absorbing a large amount of excrement There is a disadvantage that.

As another method for improving the fit at the crotch portion, and reducing the drawbacks such as a decrease in absorbing power due to the narrowing of the crotch portion and leakage at the crotch portion, a second absorber is provided on both sides of the first absorber. A method of arranging the barrier cuffs between these absorbers is disclosed (Japanese Patent Application Laid-Open No. Hei 3-11069 and Japanese Utility Model Application Laid-Open No. Hei 6-75441). In these methods, barrier cuffs are arranged along the longitudinal direction of the diaper to be used to prevent leakage, and at least in the crotch, the second absorbent body is arranged on both sides of the first absorbent body so that the inseam can be prevented. In addition to improving the fit of the part, the crotch part maintains the same absorption force as when the rectangular absorber is arranged. However, since the height of the weirs disposed on the diaper is substantially constant, there is a problem that the prevention of leakage at the crotch portion where leakage easily occurs is not sufficient.

[0009]

SUMMARY OF THE INVENTION In view of the above situation, the present inventors have proposed an absorbent article in which an absorber is disposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. A first absorbent body whose body is arranged in the central region in the longitudinal direction of the absorbent article, and a pair of second absorbent bodies provided at positions distant from the first absorbent body on both sides of at least the crotch portion of the first absorbent body. By having a body, it is possible to prevent the lowering of the absorptive power of the crotch part, and by disposing three-dimensional gathers on both sides of the second absorbent body in the longitudinal direction opposite to the first absorbent body, the second absorbent body It is concluded that it is possible to raise the body with the three-dimensional gathers to the side of the first absorbent body, substantially raise the weir in the crotch to prevent leakage, and improve the fit of the crotch of the wearer. I arrived. An object of the present invention is to provide a second absorbent body on both side portions of a first absorbent body arranged in a longitudinal central region of an absorbent article, and to arrange the second absorbent body on both sides in the longitudinal direction on the side opposite to the first absorbent body. By arranging the three-dimensional gather in the part, the second absorbent body rises up to the side of the first absorbent body together with the three-dimensional gather, and the weir of the crotch is substantially raised to improve the fit of the wearer's crotch. It is an object of the present invention to provide an absorbent article that can be suitably used while increasing the flow rate and preventing the flow and leakage of urine and excrement without reducing the absorbency of the crotch part.

[0010]

The present invention provides an absorbent article in which an absorbent body is arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet, wherein the absorbent body is an absorbent article. A first absorbent body arranged in a central region in the longitudinal direction, and a pair of second absorbent bodies provided at positions apart from the first absorbent body on at least both sides of the crotch part of the first absorbent body, The absorbent article is characterized in that three-dimensional gathers are arranged on both sides of the two absorbent bodies in the longitudinal direction on the side opposite to the first absorbent body. Also, the present invention provides a first absorbent body having a narrow width in the crotch portion of the absorbent body, and a pair of second absorbent bodies provided at positions apart from the first absorbent body on both sides of the narrowed portion. It is an absorbent article having an absorbent body.

In the absorbent article according to the present invention having the above-described structure, the absorption capacity of the crotch can be improved by providing the second absorbent body on both sides of the first absorbent body arranged in the longitudinal central region of the absorbent article. Of the excrement due to a decrease in the amount of absorption in the crotch portion, or the flow and excretion of the excretion in a portion where the absorber does not exist. Further, by disposing three-dimensional gathers on both sides in the longitudinal direction on the side opposite to the first absorber of the second absorber, the second absorber is raised together with the three-dimensional gathers on the side portions of the first absorber, and The height of the weir of the crotch is increased to improve the fit of the crotch of the wearer, and the absorbency of the absorbent article in the lateral direction of the crotch is increased to prevent the flow and leakage of urine and excrement. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The topsheet used in the present invention is a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, or the like, and its constituent fibers are polypropylene, polyethylene, polyester, nylon or nylon. Composite fibers composed of two or more components such as polyester, polypropylene, polyethylene and nylon may be used. In particular, polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are particularly limited. is not.

The top sheet does not need to be constituted by a single sheet, but may be constituted by a plurality of sheets, for example, by changing the sheet between the upper surface of the absorber and the side flap. Further, when the surface sheet is composed of a plurality of sheets, each sheet may use a different material or the same material.

The back sheet used in the present invention is:
It is composed of a liquid impermeable film such as polyethylene, a material in which the liquid impermeable film is bonded to a nonwoven fabric, a woven fabric, or the like.

The absorbent is made of cotton-like pulp, SAP, hydrophilic sheet, etc., and is not particularly limited.

The absorbent used in the present invention is made from known absorbent materials commonly used in conventional disposable diapers and other absorbent articles. That is, it is formed from a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, and is wrapped with a hydrophilic sheet. Then, SAP is uniformly mixed in each mat or arranged in layers between each mat. Alternatively, 3 to 60% by weight of the heat-fusible substance may be mixed with the cotton-like pulp and thermocompression-bonded. Alternatively, only the SAP may be wrapped with a hydrophilic sheet. The cotton-like pulp is a fiber having a fiber length of 5 mm or less obtained by defibrating a chemical pulp sheet, a mechanical pulp sheet, or a waste paper pulp sheet with a crusher. As the pulp material, not only softwood but also hardwood, straw, bamboo and kefna are applied. The amount of the pulp used varies depending on the intended absorber, for example, it is used alone, a plurality of layers are used, or another absorbent is used in combination, but generally 50 to 400 g / It is in m ^2.

Examples of SAP include starch, cellulose, and synthetic polymer. That is, a starch-acrylic acid (salt) graft copolymer, a saponified product of starch-ethyl acrylate graft copolymer, a saponified product of starch-methyl methacrylate graft copolymer, and a saponified product of starch-acrylonitrile graft copolymer , A saponified starch-acrylamide graft copolymer,
Starch-acrylonitrile 2-acrylamide-2
-Methylpropanesulfonic acid graft copolymer saponified product, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, cross-linked product of sodium carboxymethyl cellulose, cross-linked product of polyvinyl alcohol-maleic anhydride reactant And so on. It absorbs more than 20 times its own weight of urine, body fluid and water, and sodium polyacrylate type is most suitable from the viewpoint of absorption performance. S
The distribution amount of the AP was 10% of the total weight of the floc pulp in the dry state.
５００500% by weight, preferably 15-300% by weight, such amounts of SAP being substantially uniformly distributed in the floc. When the SAP absorbs and swells, the particles have minimal interference with each other, are less likely to form continuous permeation barriers, and penetrate and absorb urine and bodily fluids in three dimensions.

The hydrophilic sheet may be a hydrophilic sheet such as tissue, absorbent paper, hydrophilic non-woven fabric or the like. As a method of compressing the absorber, a continuous surface may be used so that the density of the absorber is substantially uniform by a roll having a smooth peripheral surface, or the peripheral surface may be uneven. The density of the absorbent body may partially differ depending on the roll or the like, and the embossing may be a pattern arrangement that guides urine or body fluid in the vertical and diagonal directions. In the case of embossing, the compressed part and the non-compressed part may be continuous or discontinuous.

A diffusion layer may be provided on at least a part of the absorber. By providing the diffusion layer, even if the space under the surface sheet is not sufficiently provided due to the posture of the wearer,
It is possible to prevent leakage of urine, body fluid, etc. without reducing the absorption rate of urine, body fluid, etc.

The diffusion layer is a hydrophilic liquid-permeable nonwoven fabric, woven fabric, porous plastic, floc pulp, or the like, and its component may be polypropylene, polyethylene, polyester, rayon, pulp, or a composite fiber thereof. There is no particular limitation. The diffusion layer is disposed between the topsheet and the absorber, and is adhesively fixed to the absorber with an adhesive or the like.

The three-dimensional gather used in the present invention is formed of a three-dimensional gather sheet and a stretchable elastic body.

The material of the three-dimensional gather sheet is a hydrophilic or hydrophobic non-woven fabric, a woven fabric, a porous plastic film or the like, or a liquid impermeable film, or a laminate of these, and the constituent fibers of the woven fabric and the non-woven fabric. Is polypropylene, polyethylene, polyester, nylon or
A composite fiber composed of two or more components such as polyester, polypropylene, polyethylene and nylon may be used. Particularly, a composite fiber of polyester / polyester, polyester / polyethylene, polypropylene / polyethylene is preferable in terms of strength, but is particularly limited. is not.

As the elastic member, a thread-shaped, string-shaped, or flat-shaped member made of natural, synthetic rubber, urethane or the like is used depending on the installation position. The elastic member is fixed to the sheet with an adhesive.

As the bonding method, a hot-melt, starch-based or water-soluble glue such as CMC (carboxymethylcellulose), a highly fluid adhesive, or welding by heat or ultrasonic waves may be used.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The absorbent article of the present invention will be described in detail below with reference to the drawings using a diaper that is used as an example, but the present invention is not limited thereto. FIG. 1 is a partially cutaway developed plan view of the disposable diaper of the present invention. In FIG. 1, the disposable diaper has an absorber 3 arranged between a liquid-permeable topsheet 1 and a liquid-impermeable backsheet 2. Top sheet 1 and back sheet 2
The topsheet 1 is overlaid on the backsheet 2,
The whole body is bonded so as to be integrated at the outer circumferences (peripheries) and contains the absorber 3. In addition, the absorber 3
The front and back double-sided sheets are extended on the outer sides of both side portions in the width direction, and side flaps are formed on both sides. In the crotch part, the first absorber 4 located in the central part of the crotch part has a narrower width, and the second absorbers 5 are arranged on both sides of the narrowed part and used. The three-dimensional gathers 6 to which the three-dimensional gather elastic bodies 9 are bonded in a stretched state are arranged along both sides of the diaper. Between the top sheet 1 and the back sheet 2 formed by the flap portion, leg elastic bodies 7 are arranged in an expanded state in order to prevent leakage of exudate from around the legs while wearing. Further, on the back flap portion, a waist elastic body 8 is provided in an extended state in order to improve the fit to the wearer's waist and prevent leakage of exudate from around the waist. In addition, a fastening tape 10 is provided in order to allow the wearer to easily remove the wearable diaper.

The width of the first absorber 4 at the crotch is 30 mm
The above is 200 mm or less, preferably 50 mm or more and 150 mm or less. The width of the first absorbent core 4 at the crotch portion varies depending on the body type of the wearer and the type of the absorbent article, but it is necessary that the width be such that the fit at the crotch portion of the wearer is enhanced. In addition, the width of the second absorber 5 at the crotch portion is 5 mm or more and 100 mm or less, and preferably 10 mm or more and 80 mm or less.

In the drawing, the three-dimensional gathers 6 are provided in a pair along the side of the absorber 3 over the entire surface in the longitudinal direction, but may be provided at least in a part including the crotch portion. However, a plurality of sets may be provided. Also,
The standing point 11 of the three-dimensional gather 6 may be on the absorber 3, but may be on the side of the absorber 3 or may be disposed over both. Further, in the absorbent article having the pad structure, the three-dimensional gather 6 in which the sheet extending to the side of the absorbent body 3 includes the elastic body may be used. Furthermore, three-dimensional gather 6
The free edge 12 may be partially fixed to the upright point 11, but may not be fixed and is not particularly limited. Also, when it is fixed, it may be inside or outside the upright point 11 or may be on the upright point 11. The standing points 11 of the three-dimensional gathers 6 may be parallel or non-parallel.
The height of the weir 13 of the three-dimensional gather 6 is 5 mm or more and 100 mm or less at the crotch portion, and preferably 10 mm or more and 60 mm or more.
mm or less. Further, the height of the weir 13 of the three-dimensional gather 6 may be constant along the longitudinal direction of the absorbent article,
It may change. That is, it is a configuration of the well-known three-dimensional gather 6 that is usually used for a conventional disposable diaper and other absorbent articles, and is not particularly limited.

The three-dimensional gather 6 sheet is used as the absorber 3
The surface sheet 1 on the upper surface, the side sheet on the upper surface of the side flap portion, or the sheet as a separate member may be used. Furthermore, the three-dimensional gather 6 sheet does not need to be formed of a single sheet, and these sheets may be laminated together. When laminating a plurality of sheets, a space may be formed in the three-dimensional gather 6.

In the drawing, the elastic body 9 of the three-dimensional gather 6 is
One is provided at the end of the free edge 12 of the three-dimensional gather 6, but it may be provided at the end of the free edge 12 or at the near edge thereof, and only one elastic body 9 is provided for each three-dimensional gather 5. May be provided, but a plurality of them may be provided and are not particularly limited.

FIG. 2 is a perspective view of the disposable diaper of FIG. In FIG. 2, the absorbent body 3 of the diaper to be used is formed of a first absorbent body 4 having a narrow width at the crotch portion and second absorbent bodies 5 arranged on both sides thereof. Further, a three-dimensional gather 6 is arranged on the side of the absorber 3.

FIG. 3 is a sectional view taken along line XX 'of the disposable diaper of FIG. In FIG. 3, the top sheet 1 and the back sheet 2 are bonded at the boundary between the first absorbent body 4 and the second absorbent body 5.

FIG. 4 is a sectional view taken along the line XX 'of the crotch portion when the diaper is worn by the wearer for use.
This is an embodiment different from FIG. In FIG. 4, the second absorbent body 5 rises to the side portion of the first absorbent body 4 in conjunction with the rising of the three-dimensional gather 6, and the weir for the first absorbent body 4 in the crotch portion is substantially raised to increase the inseam. It prevents urine and excrement from leaking from the part. Furthermore, since the first absorber 4 is narrow at the crotch portion, the fit is good, while the second absorber 5 is disposed, so that the absorbing power of the crotch portion is not reduced, and the first absorber 4 is preferably provided. Used diapers have become used.

FIG. 5 is a plan view of the shapes of the first absorbent body 4 and the second absorbent body 5 used. In FIG. 5, the second absorber 5
May be disposed only in the crotch portion as in (a) and (b), but as in (c), (d) and (e), over the entire longitudinal direction of the absorbent article It may be provided. Also,
As shown in (f), the first absorber 4 and the second absorber 5 may be substantially integrated instead of being separated. Further, although not shown, a form in which the second absorber 5 is disposed only on one side of the back and belly of the crotch may be used.

In the drawing, the first absorbent body 4 and the second absorbent body 5 are separated by a slit-shaped cutout portion, but a concave embossed line is provided at the boundary between the first absorbent body 4 and the second absorbent body 5. It is okay to do it alone. The width of the slit portion and the embossed portion serving as the boundary between the first absorber 4 and the second absorber 5 is 1 mm or more and 50 mm or less, preferably 2 mm or more and 15 mm or less, and the width is uniform by each part of the absorber 3. There is no particular need. When the width of the slit portion and the embossed portion is narrow, the rise of the three-dimensional gathers 6 becomes difficult to interlock, and when the width of the slit portion is too wide, the amount of the absorber 3 in the crotch portion decreases, so that the absorbing power of the crotch portion decreases. I do. Further, the first absorber 4 and the second absorber 5 may be wrapped with separate hydrophilic sheets, or may be wrapped with the same hydrophilic sheet and integrated.

The first absorbent body 4 and the second absorbent body 5 may have the same pulp basis weight, SAP density and layer constitution, but may have different pulp basis weight, SAP density and layer constitution respectively. It is not particularly limited. Further, a diffusion layer may be provided. The diffusion layer may be provided on the entire surface of the absorber 3 or may be provided on a part thereof. The first absorber 4 and the second absorber 5 may be arranged so as to extend over them, but they may be arranged separately or only one of them may be arranged.

[0036]

As described above, in the absorbent article of the present invention, the second absorbent body is provided on both sides of the first absorbent body disposed in the central region in the longitudinal direction of the absorbent article, and the second absorbent body is provided. By disposing three-dimensional gathers on both sides in the longitudinal direction on the side opposite to the first absorbent body, the second absorbent body rises up to the side portions of the first absorbent body together with the three-dimensional gathers, and substantially the crotch weir. To increase the fit of the crotch of the wearer and reduce the flow of urine and excrement without reducing the absorption of the crotch.
It is preferably used by preventing leakage.

[Brief description of the drawings]

FIG. 1 is a partially cut-away development plan view of a disposable diaper of the present invention.

FIG. 2 is a perspective view of the disposable diaper of FIG.

3 is a sectional view taken along line X-X 'of the disposable diaper of FIG.

4 shows an embodiment different from that shown in FIG. 3; X- at the crotch portion of the wearable diaper of FIG.
X'line sectional drawing.

FIG. 5 is a plan view of the shapes of the first absorber and the second absorber.

[Explanation of symbols]

 1. Liquid permeable top sheet 2. 2. Liquid-impermeable back sheet Absorber 4. First absorber 5. Second absorber 6. Solid gathers 7. Leg elastic body 8. Waist elastic body 9. Solid gather elastic body 10. Fastening tape 11. Standing point 12. Free edge 13. Three-dimensional gather weir

Claims (2)

[Claims] 1. An absorbent article in which an absorbent body is arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet, wherein the absorbent body is arranged in a longitudinal central region of the absorbent article. A first absorbent body, and a pair of second absorbent bodies provided at positions apart from the first absorbent body on at least both sides of the crotch part of the first absorbent body, the first absorbent body of the second absorbent body An absorbent article in which three-dimensional gathers are provided on both sides in the longitudinal direction on the opposite side. 2. A first absorbent body having a narrow width at the crotch portion of the absorbent body, and a pair of second absorbent bodies provided at positions separated from the first absorbent body on both sides of the narrowed portion. The absorbent article according to claim 1, which has a body.