JPH1043236A - Absorbent articles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article in which excrement will not flow on a surface sheet to leak without reducing speed of absorbing urine or body fluid from the surface sheet. SOLUTION: This absorptive article comprises a center top sheet 1 which is liquidpermeable, a back sheet 2 which is liquid-impermeable, and an absorption body 3 disposed between them, and the center top sheet 1 and the back sheet 2 are jointed with each other at circumferential edge parts to cover the absorption body 3. The center top sheet 1 is provided with a first aperture part 6 extended along length of an absorption article, and a second aperture part 13 extended perpendicularly to the length of the absorption article, the first aperture part 6 is communicated with a pocket 7 surrounded by the center top sheet 1, the second aperture part 13 is put to face a gap 8 formed between the center top sheet 1 and the absorption body 3, and at least a pair of three- dimensional gathers 18 are additionally provided along both side edge parts of the length of the absorption article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article which prevents the flow and leakage of excrement and exhibits excellent liquid absorbency.

[0002]

2. Description of the Related Art A diaper, which is one of known absorbent articles, comprises a cotton-like pulp and a superabsorbent polymer (hereinafter, SAP) between a liquid-permeable top sheet and a liquid-impermeable back sheet.
), An absorbent body made of a hydrophilic sheet or the like is arranged, and urine is absorbed by the absorbent body through the topsheet.

In recent years, absorbent articles used for diapers, sanitary napkins, and the like have become thinner and more compact from the viewpoints of ease of use and reduction of distribution costs, and as a result, the volume used for the absorbent has been increased. There is a tendency to reduce the use ratio of flocculent pulp having a large volume and increase the ratio of SAP having a small volume and a large absorption capacity.

However, since SAP absorbs urine and body fluid at a low speed, an absorbent article composed of a thin absorber having a high SAP usage ratio requires a rate at which urine or body fluid is absorbed from the topsheet (hereinafter referred to as absorption). Speed))
Therefore, there is a possibility that urine or body fluid leaks from the absorbent article.

In the case of disposable diapers in particular, if the excrement has a high viscosity or a large amount in the past, the liquid permeability of the topsheet is not sufficient, and the excrement may flow on the topsheet and leak. is there.

[0006] In order to improve the problem of a decrease in the absorption rate of an absorbent article using the thin absorbent, a diffusion layer is provided between the liquid-permeable top sheet and the absorbent, or the structure of the absorbent is modified. It has been proposed to use highly diffusive fibers. As an absorbent article provided with the diffusion layer, there is a diffusion sheet made of synthetic fibers (JP-A-60-198152 and JP-A-62-276003). As absorbent articles using cross-linked cellulose fibers in fibers (Japanese Unexamined Patent Publication (Kokai) No. 3-2061)
76 publication) and the like. However, in order to provide the absorbent article with a liquid diffusibility that does not leak urine or body fluid from the absorbent article, a diffusion layer or a diffusive fiber having many voids that can temporarily hold the liquid must be used. However, this goes against thinner and more compact absorbers.

In addition, the absorbent article is folded inward in the width direction to form a folded portion (Japanese Utility Model Application Laid-Open Nos. 56-3209, 56-3210, 60-163).
911 and JP-A-2-111361) and an absorbent article in which the absorbent article is bent inward at the crotch portion in the width direction and joined (Japanese Patent Laid-Open No. 6-39000).
Even if these are absorbers having a constant width and a uniform absorption capacity per area, the fitting property is easily increased by narrowing the width of the central part of the absorbent article. For example, when applied to a diaper, it is possible to increase the absorption capacity per area of the crotch portion. However, since the top sheet, the back sheet and the absorber are integrally folded or bent, a space cannot be formed between the top sheet and the absorber,
It is not possible to improve the absorption speed of a thin absorber.

To prevent leakage of high-viscosity excrement, there is disclosed a method in which a second topsheet is further laminated on a first topsheet of an absorbent article, and an opening is provided in the second topsheet. JP-A-5-277149, JP-A-5-5-2
No. 85168, JP-A-5-345003, JP-A-6-7725, JP-A-6-11723, JP-A-6-21622, JP-A-6-2162.
No. 3). However, these methods can prevent the excrement from leaking, but when the excrement has a high viscosity, the excrement spreads on the first surface sheet without penetrating the first surface sheet, and stains the wearer's skin over a wide area. In addition, it causes discomfort to the wearer, and in the case of an infant, there is a problem of causing skin irritation.

In order to solve this problem, an excrement reservoir is formed in the crotch area of the absorber by the unevenness of the absorber.
No. 29123, Japanese Utility Model Application Laid-Open No. 4-15921, Japanese Utility Model Application No. 5-86320, Japanese Utility Model Application Laid-Open No. 6-31722), or a raised auxiliary absorber is arranged at the crotch of the absorber to prevent leakage (actually, (Japanese Unexamined Patent Publication No. Hei 6-21626). However, in these methods, depending on the posture of the wearer, there is a problem that the excrement cannot be stored in the excrement storage section, or even once stored, the excrement may protrude from the excrement storage section depending on the posture of the wearer. is there.

[0010] For this reason, a method has been disclosed in which a space is provided between the topsheet and the absorber by the unevenness of the lower part of the topsheet such as the absorber and the excrement is stored between the topsheet and the absorber (Japanese Utility Model Laid-Open No. 4-15921). JP, JP-A-4-30054
No. 3).

An article provided with a gap between a topsheet and an absorbent body may be an absorbent article used as a sanitary napkin and having an elastic member mounted in the topsheet along a longitudinal central axis. (JP-A-5-62228).

A method of directly providing an opening in the first topsheet for storing excrement is disclosed (Japanese Utility Model Application Laid-open No. 57-157).
162305, Japanese Utility Model Laid-Open No. 1-94403, Japanese Utility Model Laid-Open No. 4-42814).

On the other hand, a space is provided between the top sheet and the absorber, and an opening is provided on the top sheet, and the top sheet and the back sheet having a peripheral dimension larger than the peripheral dimension of the top sheet are connected to the peripheral section. An absorbent article having an opening (Japanese Patent Laid-Open No. 4-102452) is disclosed.

As a method for preventing leakage in the lateral direction, an absorbent article in which three-dimensional gathers are provided along the longitudinal direction of the absorbent article (JP-A-62-250201, JP-A-3-250201).
No. 1311253) is disclosed.

[0015]

Problems to be Solved by the Invention
And JP-A-4-300543, it is difficult to provide a sufficient space between the topsheet and the absorber, and it is difficult to form a compact absorbent article due to the unevenness of the absorber itself. There is a problem.

[0016] Further, the one disclosed in Japanese Utility Model Laid-Open No. 5-62228 has a problem that a sufficient space cannot be formed under the topsheet when stretching and pressing against the skin of the wearer is moderate.

Also, Japanese Utility Model Laid-Open No. 57-162305,
Japanese Utility Model Laid-Open No. 1-94403 and Japanese Utility Model Laid-Open No. 4-4281.
The device disclosed in Japanese Patent Publication No. 4 (1993) -1992 has a problem in that, when there is no space below the topsheet in the opening, excrement remains on the topsheet without being stored under the topsheet and leaks.

Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-102452, excrement is excreted at a speed higher than the absorption speed when the opening of the topsheet is not sufficiently opened due to the posture of the wearer. In this case, since the size of the top sheet is smaller than that of the back sheet, there is a problem that the top sheet leaks without remaining on the top sheet.

Also, Japanese Patent Application Laid-Open No. 62-250201,
Japanese Unexamined Patent Publication (Kokai) No. 3-131253 can prevent leakage in the lateral direction, but cannot prevent leakage from the dorso-ventral direction. If the excrement has a high viscosity or a large amount, the absorbent article can be prevented. There was a problem that leaked from the back and flank portion of the. In addition, there is also a problem that even if there is no leakage, excrement spreads on the topsheet, stains the wearer's skin over a wide area, gives the wearer discomfort, and in the case of an infant, causes skin irritation.

Accordingly, it is an object of the present invention to provide an absorbent article which prevents the flow and leakage of excrement and exhibits excellent liquid absorbability.

[0021]

In view of this situation, the present inventors have an absorber between a liquid-permeable top sheet and a liquid-impermeable back sheet, and the top sheet and the back sheet have a peripheral edge. In order to absorb liquid quickly even with a thin absorbent body in an absorbent article that is joined by a part, a sufficient space that can temporarily hold the liquid is provided between the topsheet and the absorbent body, and the absorbent sheet is placed on the topsheet. In order to provide an opening and to prevent leakage of high-viscosity excrement that hardly penetrates the topsheet, the excrement is temporarily stored in a part that does not come into contact with the wearer's skin without reducing the size of the topsheet. It is concluded that it is important to provide a space for the excrement and to provide a second opening to the absorber in the buttocks abutment part of the back body of the topsheet, and to store the excrement in the space below the topsheet. Was.

Therefore, the absorbent article according to the present invention has
A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the two sheets, wherein the top sheet and the back sheet cover the absorber, and An absorbent article joined at a portion, wherein the topsheet has a first opening extending along the longitudinal direction of the absorbent article, and a first opening extending along a direction perpendicular to the longitudinal direction of the absorbent article. Two openings, the first opening communicating with a pocket surrounded by the topsheet, the second opening facing a gap formed between the topsheet and the absorber, and At least one pair of three-dimensional gathers having an elastic body is further provided along both longitudinal side edges of the article.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent article according to the present invention, a plurality of the first openings are provided, and the plurality of the first openings are arranged along the longitudinal direction of the absorber, and are provided in one pocket. Alternatively, they may communicate with each other.

Further, in the absorbent article of the present invention, a plurality of the first openings are provided, and the plurality of first openings are
The plurality of independent pockets may communicate with each other.

Further, in the absorbent article according to the present invention, a part of an opening end of the top sheet forming the second opening may be bonded to the absorber.

Further, in the absorbent article according to the present invention, a top surface sheet on one side in the longitudinal direction of the absorbent article may be bonded to the absorber with the second opening as a boundary.

Further, in the absorbent article of the present invention, the elastic body of the three-dimensional gather has a draft rate of 150 to 500.
%.

Further, in the absorbent article according to the present invention, the height of the three-dimensional gather may be 5 to 100 mm at a crotch portion.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the absorbent article of the present invention will be described in detail with reference to the drawings, taking a spread-type disposable diaper as an example, but the present invention is not limited to these.

As shown in FIG. 1, the unfolded diaper 9 shown in this embodiment has a center top sheet 1 and a side top sheet 15 which are liquid permeable top sheets, and a back sheet which is a liquid impermeable back sheet. Absorber 3 is arranged between sheet 2 and sheet 2. The absorber 3 is partially or entirely adhered and fixed to the back sheet 2. The center top sheet 1 and the back sheet 2 are adhered so that the center top sheet 1 is superimposed on the back sheet 2 and the whole is united at the outer peripheral edges.

The topsheet used in the present invention is:
It is composed of a center top sheet 1 and a side top sheet 15 with the three-dimensional gather standing point 21 as a boundary, and is a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, or the like. , Polyester, nylon, or 2 of polyester, polypropylene, polyethylene, nylon, etc.
It is a composite fiber composed of components or more. In particular, a composite fiber of polyester / polyester, polyester / polyethylene, or polypropylene / polyethylene is preferable from the viewpoint of strength, but is not particularly limited.

The size of the top sheet composed of the center top sheet 1 and the side top sheet 15 may be the same as or larger than that of the back sheet 2. Each of the center top sheet 1 and the side top sheet 15 does not need to be constituted by a single sheet, and may be constituted by a plurality of sheets. The center top sheet 1 and the side top sheet 15 may be made of different materials, or may be made of the same material.

Back sheet 2 used in the present invention
Is composed of a liquid impermeable film such as polyethylene, a material in which a liquid impermeable film is bonded to a nonwoven fabric or a woven fabric, or the like.

The absorber 3 used in the present invention is formed from cottony pulp, SAP, hydrophilic sheet, etc.
There is no particular restriction on which of them to employ or how to combine them. The absorbent body 3 is made of a known absorbent material usually used in conventional disposable diapers and other absorbent articles. That is, it is formed of 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. In this mat of absorbent material, the SAP may be uniformly mixed in each mat, or may be disposed in layers between each mat. The absorbent body 3 formed from such a single-layer or multi-layer mat has a thickness of 3 to 6 with respect to the cotton-like pulp.
0% by weight of a heat-fusible substance may be mixed and thermocompression bonded.
Alternatively, only the SAP may be wrapped by the hydrophilic sheet.

The cotton-like pulp used in the absorbent body 3 is preferably a chemical pulp sheet or a fiber pulp obtained by fibrillating a mechanical pulp sheet with a crusher and having a fiber length of 5 mm or less. The pulp raw material is not limited to softwoods, but hardwoods, straws, bamboos, and kenafs are also applicable. Recycled paper pulp may be used. The amount of the pulp used varies depending on the intended absorber, for example, depending on whether it is used alone, or a plurality of layers are used, or another absorbent is used in combination. 400 g / m ²
It is.

Examples of the SAP used in the absorber 3 include starch, cellulose, and synthetic polymer. That is, a starch / acrylic acid (salt) graft copolymer, a saponified starch / ethyl acrylate graft copolymer, a saponified starch / methyl methacrylate graft copolymer, and a saponified starch / acrylonitrile graft copolymer , Starch / acrylamide graft copolymer, saponified starch / acrylonitrile-2-acrylamido-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid And cross-linked products of sodium carboxymethyl cellulose and cross-linked products of polyvinyl alcohol-maleic anhydride reactant. It absorbs urine, body fluid, and water at least 20 times its own weight, and sodium polyacrylate is most suitable from the viewpoint of absorption performance. The distribution amount of the SAP is 10 to 500 parts by weight based on 100 parts by weight of the dried floc pulp,
It is preferably 15 to 300 parts by weight, and such an amount of SA
P is substantially uniformly distributed in the floc. SAP
When absorbed and swelled, the particles have minimal interference with each other, are less likely to form a permeation barrier by continuous contact, and penetrate and absorb urine and body fluid in three dimensions.

The hydrophilic sheet used in the absorber 3 may be a hydrophilic sheet such as a tissue, an absorbent paper, a hydrophilic nonwoven fabric, or the like.

As a method for compressing the absorber 3, the absorber 3 may be a continuous surface such as a roll having a smooth peripheral surface so that the density of the absorber 3 is substantially uniform over the entire surface. The density of the absorber 3 may be partially different depending on a roll or the like having an uneven shape, and the embossment may have a pattern arrangement for guiding urine or body fluid in the vertical direction and the oblique direction. In the case of embossing, the compression section and the non-compression section may be continuous or discontinuous.

The shape of the absorber 3 may be rectangular or hourglass-shaped, and may be any of known shapes commonly used for conventional disposable diapers and other absorbent articles, and is not particularly limited.

Further, a diffusion layer (not shown) may be provided on at least a part of the absorber 3. By providing the diffusion layer, even if the space 8 below the topsheet 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. Becomes possible.

The diffusion layer is made of a hydrophilic liquid-permeable nonwoven fabric, woven fabric, porous plastic, flocculent pulp or the like, and its constituent component is polypropylene, polyethylene, polyester, rayon, pulp or a composite fiber thereof. Well, no particular restrictions. The diffusion layer is provided between the center top sheet and the absorber 3, and is fixed to the absorber 3 with an adhesive or the like.

A pair of three-dimensional gathers 18 are provided along both longitudinal side edges of the diaper. The three-dimensional gather 18 used in the present invention includes the three-dimensional gather sheet 2.
3 and the elastic body 19 for three-dimensional gathers.

The material of the three-dimensional gathering sheet 23 is a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film or the like, or a liquid-impermeable film, or a laminate thereof. The constituent fibers may be polypropylene, polyethylene, polyester, nylon, or a composite fiber composed of two or more components such as polyester, polypropylene, polyethylene, and nylon. In particular, a composite fiber of polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene Is desirable from the viewpoint of strength, but is not particularly limited. Alternatively, three-dimensional gather sheet 23
May be made of the same material as the side top sheet 15, and in this case, the side top sheet 15 may be formed to be extended.

As the elastic body 19 for the three-dimensional gather, a thread-like, string-like or flat-shaped material such as natural, synthetic rubber or urethane is used depending on the installation position. Elastic body for solid gather 1
9 is fixed to the three-dimensional gather sheet 23 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.

The center top sheet 1, the side top sheet 15, and the back sheet 2 are extended outside the both sides in the width direction of the absorber 3, and lateral flaps 22F and 22R are formed on both sides. ing.

The center top sheet 1 has two grooves 4 formed by intermittently joining along the longitudinal direction of the diaper 9, and has eight first openings 6 on the groove 4. A pocket 7 (see FIG. 3) is formed. further,
The center top sheet 1 has one elongated opening end (cut) 1 in a direction perpendicular to the longitudinal direction at the buttocks abutment portion of the back body.
2, the second opening 13 is formed.

Between the side top sheet 23 formed by the flaps 22F and 22R and the back sheet 2, in order to prevent leakage of exudate from around the leg during wearing, an elastic elastic body 20 for leg gather around the leg is provided. Installed in the extended state. Further, preferably on the back flap 22R,
In order to improve the fit to the wearer's waist and prevent leakage of exudate from around the waist, the waist elastic body 14 is used.
Is installed in an extended state. Further, in order to allow the wearer to easily remove the diaper 9 from the user, a pair of left and right adhesive tapes 16 is provided together with the base tape 17 on the back flap 22R.

By forming the second opening 13 in the buttocks abutment part of the rear body part in contact with the wearer's anus, the excrement is not left on the center top sheet 1 and the center top sheet 1 and the absorber 3 can be accommodated in the space 8 (see FIG. 4). In FIG. 1, the opening end (cut) 12 of the second opening 13 is formed in a straight line. However, the opening end 12 may be rectangular (see FIG. 7) and does not particularly define the shape. The size of the second opening 13 is not particularly limited as long as the excrement can be accommodated in order to store the excrement in the gap 8 between the center top sheet 1 and the absorber 3. is not. Further, the periphery of the opening end 12 of the second opening 13 may be subjected to measures such as folding of the center top sheet 1 at the periphery of the opening end and wrapping with a separate member. A stretchable elastic body (not shown) is provided in an extended state at a near edge of the second opening 13 to extend the second opening 1.
3 may be expanded and contracted.

The region of the absorber 3 facing the second opening 13 may be the absorber 3 directly. However, if the wearer
As shown in FIG. 8, in order to improve the feel when the posture is taken such that the gap 8 of the second opening 13 is crushed,
It is preferable that a covering sheet 24 having the same size as or larger than the opening area of the second opening 13 and made of the same material as the center top sheet 1 is adhered to the absorber 3 and covered.
Alternatively, the cover sheet 24 may be a sheet made of a material different from that of the center top sheet 1.

In the example shown in FIG. 1, two grooves 4 are provided. However, the number of grooves 4 may be one, and the number of grooves 4 can be provided as much as possible in the absorbent article. When providing a plurality of grooves 4 in the absorbent article, the length of each groove 4 does not need to be constant. Further, each groove 4 may be in contact with both side edges, or may be separated. The interval between the grooves 4 in the width direction is preferably 10 mm or more and 200 mm or less. Each groove 4
Need not be constant. Furthermore, the length of the groove 4 is not less than 3 mm and not more than the length in the longitudinal direction of the absorbent article, and the groove 4 may be a straight line parallel to the longitudinal direction, a curve, or the grooves 4 may be parallel to each other. However, there is no particular limitation.

The first opening 6 of the groove 4 is 8 in the example of FIG.
Although one piece is provided, one piece may be provided, and any number of pieces may be provided as long as it can be installed in the groove 4. The size of the first opening 6 is 3 mm or more along the longitudinal direction and less than the longitudinal length of the absorbent article, and is preferably 5 mm or more and 50 mm or less. In the example of FIG.
Although the interval between the bonding portions 5 is constant and the interval between the first openings 6 is also constant, the size of the first opening 6 does not need to be particularly constant.

In the example shown in FIG. 1, the three-dimensional gathers 18 are arranged in a pair along the side of the absorber 3 over the entire surface in the longitudinal direction, but may be arranged at least in a part including the crotch. , A pair, or a plurality of sets may be provided. In addition, the standing point 21 of the three-dimensional gather 18 may be on the absorber 3, may be on the side of the absorber 3, or may be disposed over both. In the case of an absorbent article having a pad structure, a three-dimensional gather 18 including an elastic body 19 in a sheet extending to the side of the absorber 3 may be used. Further, although not shown in FIG. 1, the free edge of the three-dimensional gather may be partially fixed to the standing point 21, or may not be fixed, and is not particularly limited. Also, when fixed, it may be inside or outside of the upright point 21.
It may be on one. However, it is desirable that the three-dimensional gathers 18 be turned inward at the inseam portion. Each three-dimensional gather 1
8 may be parallel or non-parallel. The height of the three-dimensional gathers 18 is 5 mm or more and 100 m at the inseam.
m, preferably 10 mm or more and 60 mm or less. When the height of the three-dimensional gathers 18 is higher than 100 mm, the three-dimensional gathers sheet 23 covers the absorber 3 depending on the wearing and posture of the wearer, or the three-dimensional gathers sheet 23 is turned over and excreted by the outside. This may cause problems such as easy leakage. If the height of the three-dimensional gathers 18 is less than 5 mm, there is almost no effect of preventing excrement leakage. on the other hand,
The height of the weir 22 of the three-dimensional gather 18 may be constant along the longitudinal direction of the absorbent article, but may be varied. That is, it may have a known three-dimensional gather structure which is usually used for conventional disposable diapers and other absorbent articles, and is not particularly limited.

In the example of FIG. 1, one elastic body 19 for three-dimensional gathers is provided at the free edge of the three-dimensional gather 18, but it is sufficient that it is provided at the free edge or at the vicinity thereof. In addition, only one elastic body 19 for three-dimensional gathers may be provided for each three-dimensional gather 18, but a plurality of elastic bodies 19 may be provided, and there is no particular limitation. Further, the elastic body 19 for three-dimensional gathers is disposed in an extended state, and the extended state is obtained by the following formula as a draft rate.

Draft rate (%) = (length of elastic body in stretched state) / (length of elastic body in non-stretched state) × 100 The draft rate of elastic body 19 for three-dimensional gather provided in the present invention is 150 to 500%. And preferably 200 to 3
00%. A plurality of elastic bodies 19 are provided on the three-dimensional gather 18.
Are provided, the respective elastic members may be provided in the same extended state or may be different. Also,
The thickness of the elastic body 19 for three-dimensional gathers may be the same, but may be different.

The rise of the three-dimensional gather 18 is determined by the degree of contraction of the three-dimensional gather sheet 23. The degree of contraction of the three-dimensional gather sheet 23 is determined by the thickness, the number, and the expanded state of the material of the three-dimensional gather sheet 23 and the elastic members 19 provided. The degree of contraction of the three-dimensional gather sheet 23 can be determined by the following formula as a gather ratio when the non-stretched state of the three-dimensional gather 18 is set to 100.

Gather ratio (%) = {(length of sheet in stretched state) − (length of sheet in non-stretched state)} / (length of sheet in non-stretched state) × 100 Solid gather 18 of the present invention Gathering rate is 50-35
0%, preferably 75 to 200%. If the gathering rate of the three-dimensional gathers 18 is greater than 350%, the circumference of the wearer's legs is tightened, giving the wearer discomfort. If it is lower than 50%, the solid gather 18
Does not rise sufficiently, and it is not possible to sufficiently prevent lateral leakage.

The first opening 6 of the diaper 9 shown in FIG. 1 can be formed by, for example, bending and bonding the center top sheet 1 as shown in FIG.

FIG. 2 shows an example of a developed plan view before bonding the bonding portion 5 of the center top sheet 1 of the diaper 9 shown in FIG.
Shown in In FIG. 2, the center top sheet 1, the side top sheet 15, and the back sheet 2 are formed to have the same dimensions and shape as a whole, and the center top sheet 2 is superimposed on the back sheet 3, and the whole is integrally formed at the outer peripheral edge of each other. It is adhered so that it becomes. The pocket 7 having the first opening 6 formed in the center top sheet 1 is formed such that the surfaces of the center top sheet 1 (the surfaces that become the inner surfaces of the grooves 4) are centered on the valley fold line 10 and the mountain fold line 11a. And 11b are formed by intermittently adhering in the adhering portion 5 in the width direction such that they come into contact with each other. In this figure, the bonding portion 5 is a point on the mountain fold lines 11a and 11b.
It may be a straight line straddling b. When the bonding portion 5 is a point, the pockets 7 formed in the groove portion 4 are connected to form one large pocket, but when the bonding portion 5 is straight, the pocket 7 is separated by the bonding portion 5 and becomes independent. It becomes the storage part which did. In this manner, the pockets 7 may be independent for each first opening 6 or may be connected together under the bonding portion 5.

In FIG. 2, the mountain fold lines 11a and 11a
The interval with b is 5 mm or more and less than the width of the absorbent article,
Preferably it is 10 mm or more and 100 mm or less. Further, the mountain fold lines 11a and 11b may be straight or curved as shown in FIG. 2, so that the depth of the pocket 7 may be uniform or non-uniform, and is not particularly specified.
When a plurality of grooves 4 are formed, each groove 4
The size of the pocket 7 below may be uniform, but may be uneven.

The structure of the first opening 6 and the second opening 13 of the diaper 9 of FIG. 1 will be described in detail with reference to FIGS.

First, FIG. 3 shows a cross section taken along line XX ′ of the diaper 9 of FIG. In FIG. 3, an absorber 3 is provided between a liquid-permeable center top sheet 1 and a liquid-impermeable back sheet 2. The absorber 3 is partially or entirely adhered and fixed to the back sheet 2 with an adhesive or the like. The center top sheet 1 and the back sheet 2 are also adhered to each other at the side edges.

The center top sheet 1 is bent so that the center top sheets 1 face each other along the longitudinal direction of the diaper 9 in the central region along the width direction, and the area where the surfaces of the center top sheet 1 contact each other is intermittent. The pocket 7 having the first opening 6 is formed below the groove 4 by bonding the adhesive 7 to the bonding portion 5. In addition, since the center top sheet 1 has a region that is not bonded to the absorber 3, the pocket 7 is formed to form a gap 8 between the top sheet 1 and the absorber 3.

In the absorbent article of the present invention, an elastic body (not shown) may be provided along the vicinity of the groove 4. By disposing the elastic body in an extended state along the vicinity of the groove 4, the opening end 12 of the first opening 6 formed on the groove 4 is easily opened by the contraction of the elastic body, and excretion is achieved. It becomes easier to store things.

FIG. 4 shows a cross section taken along the line YY 'of the diaper 9 shown in FIG. In FIG. 4, each center top sheet 1 on both sides of the opening end (cut) 12 of the second opening 13 is
The sheet side closer to the bonding portion 5 of the groove 4 is further away from the absorber 3, and forms a second opening 13 between the groove 4 and the other sheet side farther from the bonding portion 5. In the drawing, the topsheet 1
Although the second opening 13 is formed by providing one opening end (cut) 12 in a direction perpendicular to the longitudinal direction of the center sheet, it may be formed by two center top sheets 1.
At this time, there may be an overlapping portion between the center top sheets 1.

Further, a bent portion may be formed at a part of the opening end 12 of the center top sheet 1 forming the second opening 13, and a stretchable elastic body (not shown) may be formed near the second opening 13. ) May be disposed in an extended state.

In the diaper 9, the second opening 13
May be bonded to the absorber 3 at least a part of the open end 12 of the center top sheet 1. FIG. 5 shows a cross section taken along line YY 'of the diaper 9 in this case. FIG.
In each of the center top sheets 1 forming the opening end 12 of the second opening 13, the sheet side closer to the bonding portion 5 of the groove 4 is farther from the absorber 3 and the other sheet far from the bonding portion 5. And a second opening 13 is formed between the second opening 13 and the sheet-side opening end 12 far from the bonding portion 5 of the groove 4.
Is adhered to the absorber 3. Thus, by adhering a part of the center top sheet 1 of the second opening 13 to the absorber 3, the second opening 13 is further opened,
It becomes easier to store excrement. Also, the second opening 13
A stretchable elastic body (not shown) may be arranged in the extended state in the vicinity.

In the diaper 9, the second opening 13
, The center top sheet 1 on one side in the longitudinal direction of the diaper 9 does not create a space between the center top sheet 1 and the absorber 3,
It may be bonded to the absorber 3. Diapers 9 like this
FIG. 6 shows a cross section taken along line YY ′ of FIG. In FIG. 6, the center top sheet 1 on one side forming the second opening 13 does not form the groove 4 and is bonded to the absorber 3 without forming the gap 8 between the center top sheet 1 and the absorber 3. . The center top sheet 1 in which the gap 8 is not formed between the absorber 3 and the center top sheet 1 may be partially or entirely bonded to the absorber 3, but may not be bonded, and is not particularly limited. .

In the example of FIG. 6, the center top sheet 1 on the back side is adhered to the absorber 3, but may be on the ventral side.

FIG. 7 shows a development plane of the diaper 9 having the rectangular second opening 13. In FIG. 7, the center top sheet 1 is provided with a rectangular opening end (cut) 12.

FIG. 8 shows a cross section taken along the line ZZ 'of the diaper of FIG. In FIG. 8, a rectangular opening end 12 is provided on the center top sheet 1 at a portion in contact with the buttocks,
By cutting out along this opening end 12, a large rectangular second opening 13 is formed. In the example of FIG. 8, the region on the absorber 3 facing the second opening 13 is covered with a covering sheet 24 made of the same material as the center top sheet 1. However, in the present invention, the surface sheet 1 may be covered with a sheet of a different material,
Or you may be the absorber 3 directly without coating.
The sheet 24 that covers the absorber 3 may be partially or entirely adhered to the center top sheet 1, or may not be adhered.

The second opening 13 can be formed by providing the opening end 12 in the center top sheet 1, or alternatively, it can be formed by overlapping the center top sheets 1 forming the second opening 13. good. Second opening 13
A bent portion may be formed at the opening end 12 of the center top sheet 1, and a stretchable elastic body (not shown) may be disposed in an extended state near the second opening 13.

In the absorbent article of the present invention, a third opening to the absorber 3 may be further provided in the pocket 7 below the groove 4 for forming the first opening 6. In this case, the number of the third opening to the absorber 3 formed below the groove 4 may be one, but may be plural. Further, the shape of the opening end of the third opening may be circular, but may be a straight opening line formed along the groove 4 and is not particularly limited.

[0074]

As described above, the absorbent article of the present invention has one or more grooves in the longitudinal direction at least at the portion corresponding to the crotch of the topsheet, and the grooves are formed between the surfaces of the topsheet. Are formed to be bent toward the absorber side so as to face each other, and intermittently join the areas where the surfaces of the topsheets forming the grooves are in contact with each other to form a pocket having the first opening, so that the viscosity is increased. It is possible to temporarily store excrement, etc., which are high and difficult to absorb, in the pocket, and by preventing these leaks, the wearer's skin is stained over a wide area, giving the wearer discomfort, It does not cause skin irritation.

Further, since a space is formed between the topsheet and the absorbent, liquids such as urine and body fluid can be transferred from the topsheet to the absorbent quickly. Has excellent liquid absorbency.

Further, by providing the second opening in the buttocks abutment portion of the rear body of the topsheet, it becomes possible to store excrement in the space below the topsheet, and to discharge high-viscosity excrement. Effective for preventing leakage.

Further, by arranging three-dimensional gathers along both side edges in the longitudinal direction of the absorbent article, it is possible to enhance the prevention of leakage in the lateral direction.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a diaper according to the present invention.

FIG. 2 is a developed plan view before forming a groove portion of the diaper of FIG. 1;

FIG. 3 is a sectional view taken along line XX 'of the diaper of FIG.

4 is a sectional view taken along line YY 'of the diaper of FIG.

5 shows another embodiment different from FIG. 4;
It is Y 'line sectional drawing.

FIG. 6 is a sectional view taken along line YY ′ of the diaper of FIG. 1 showing another embodiment different from FIGS. 4 and 5;

FIG. 7 is a plan view showing another embodiment of the diaper according to the present invention which is different from FIG. 1;

8 is a sectional view taken along line ZZ 'of the diaper of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center top sheet 2 Back sheet 3 Absorber 4 Groove 5 Adhesive part 6 First opening 7 Pocket 8 Void 9 Expandable diaper (absorbent article) 10 Valley fold line 11a, 11b Mountain fold line 12 For second opening 13 Opening end (cut) 13 Elastic body for waist circumference 15 Side top sheet 16 Adhesive tape 17 Base tape 18 Three-dimensional gather 19 Elastic body for three-dimensional gather 20 Elastic body for leg gather 21 Three-dimensional gather standing point 22F, 22R Flap 23 3D gather sheet 24 Cover sheet for absorber

Claims (3)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the two sheets, wherein the top sheet and the back sheet form the absorber. An absorbent article joined at a peripheral portion so as to cover, the topsheet has a first opening extending along the longitudinal direction of the absorbent article, and a direction perpendicular to the longitudinal direction of the absorbent article. A first opening communicating with a pocket surrounded by the topsheet, and the second opening facing a gap formed between the topsheet and the absorber. An absorbent article characterized in that at least one pair of three-dimensional gathers having an elastic body is provided along both longitudinal side edges of the absorbent article. 2. The absorbent article according to claim 1, wherein a draft rate of the elastic body of the three-dimensional gather is from 150 to 500%. 3. The height of the three-dimensional gather is 5 at a crotch part.
The absorbent article according to claim 1, wherein the thickness is from 100 to 100 mm.