JPH09276333A - Absorbent material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent material on which liquid wastes does not flow and leak out without reducing the speed of absorbing the liquid wastes into the surface sheet of the absorbent product even though the absorbent material is made of thin absorber with a high ratio of highly water-absorptive polymer. SOLUTION: This absorbent material has a liquid-permeable front surface sheet 1, a non-liquid-permeable rear surface sheet 2, and an absorber 3 put between the sheets 1 and 2. More than one groove 4 are formed at least on the crotch part on the front surface sheet 1 in the longitudinal direction. The groove 4 is structured by folding the front surface sheet toward the absorber 3 and intermittently connecting the opposite surfaces of the front surface sheet. A pocket 7 with a first opening 6 is formed on the front surface sheet, and space is formed between the front surface sheet and the absorber. In addition, a second opening 7 is formed at the hip part on the rear part of the front surface sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a pocket having an opening on at least a part of a liquid-permeable topsheet and forming a space between the topsheet and a liquid-retaining absorber. It prevents the flow and leakage of excrement, has an excellent liquid absorbency, and further provides a second opening to the absorbent body at the portion of the surface sheet that contacts the buttocks when worn, so that the space is excreted. The present invention also relates to an absorbent article which is also used as a space for containing a substance and exhibits a further effect of preventing leakage of excrement, and is preferably used.

[0002]

2. Description of the Related Art A disposable diaper, which is one of known absorbent articles, comprises a cotton-like pulp and a super absorbent polymer (hereinafter referred to as SAP) between a liquid-permeable top sheet and a liquid-impermeable back sheet. The urine is absorbed by the absorbent body through the surface sheet. In recent years, disposable diapers have gradually become thinner and more compact in terms of ease of use and reduction of distribution costs.
As a result, there is a tendency that the use ratio of the cotton-like pulp having a large volume used in the absorber is reduced and the ratio of SAP having a small volume and a large absorption capacity is increased. However, because SAP absorbs urine and body fluids slowly,
A disposable diaper composed of a thin absorber having a high P content has a rate of absorbing urine or body fluid from the topsheet (hereinafter,
The absorption rate is slower), which causes the problem that urine and body fluids leak from the diaper. Further, in the conventional disposable diaper, when the excrement has a high viscosity or a large amount, the liquid permeability of the surface sheet is not sufficient, and the excrement flows over the surface sheet and leaks out.

In order to solve the problem that the absorption speed of an absorbent article using this thin absorber is lowered, a diffusion layer is provided between the liquid-permeable surface sheet and the absorber, or the structure of the absorber is changed. It has been proposed to use highly diffusive fibers. As a structure of the diffusion layer, a diffusion sheet made of synthetic fiber (Japanese Patent Laid-Open No. 60-198152, Japanese Patent Laid-Open No. 6-19822).
No. 2-276003), and an absorbent body made of highly diffusible fibers includes an absorbent article made of intra-fiber crosslinked cellulose fibers (Japanese Patent Laid-Open No. 3-206176). However, in order to impart a liquid diffusibility in which urine or body fluid does not leak from the absorbent article to the absorbent article, it is necessary to use a diffusion layer or diffusible fibers having many voids that can temporarily hold the liquid, This goes against the thinner and more compact absorber.

Also, the absorbent article is folded inward in the width direction to form a folded portion (Japanese Utility Model Publication No. 56-3209, Japanese Utility Model Publication No. 56-3210, and Japanese Utility Model Publication No. 60-163).
No. 911, JP-A-2-111361), and an absorbent article in which the crotch portion is bent inward in the width direction and joined (JP-A-6-39000).
Even if these absorbent bodies have a uniform width and uniform absorption capacity per area, the width of the central part of the absorbent article can be made narrower to easily improve the fit, and the crotch area per area can be improved. It is possible to increase the absorption capacity. However, since the top sheet, the back sheet, and the absorber are folded or folded as a unit, a space cannot be formed between the top sheet and the absorber, and the absorption speed of the thin absorber cannot be improved.

As a method for preventing leakage of high-viscosity excrement, a method has been disclosed in which a second topsheet is further stacked on the first topsheet of an absorbent article and an opening is provided in the second topsheet (special feature. Japanese Patent Laid-Open No. 5-277149 and Japanese Patent Laid-Open No. 5-2
85168, JP-A-5-345003, JP-A-6-7725, JP-A-6-11723, JP-A-6-21622, and JP-A-6-21162.
No. 3). However, in these methods, although it is possible to prevent the excrement from leaking, when the excrement has a high viscosity, it spreads on the first surface sheet without penetrating the first surface sheet, and the wearer's skin is widely spread. There is a problem that it becomes dirty, makes the wearer uncomfortable, and causes skin irritation in the case of infants.

In order to solve this problem, the excrement collection part is formed in the crotch region of the absorbent body by the unevenness of the absorbent body (actually, in 3-fold).
No. 29123, No. 4-15921, No. 5-15320, No. 5-86320, No. 6-31722, or with a raised auxiliary absorber in the crotch of the absorber to prevent leakage (actually). Methods such as Kaihei 6-21626) are disclosed. However, in these methods, depending on the posture of the wearer, there is a problem that the excrement cannot be stored in the excrement collection part, and even if the excrement is once stored, the posture of the wearer may cause the excrement to stick out from the excrement collection part. is there.

For this reason, a method has been disclosed in which a space is provided between the topsheet and the absorber due to the unevenness of the lower part of the topsheet of the absorber or the like, and the excrement is stored between them (actually, 4-15921). Japanese Patent Laid-Open No. 4-30054
No. 3). However, this method has a problem that 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.

[0008] Further, as the space provided between the topsheet and the absorber, an absorbent article having an elastic member attached to the topsheet along the central axis of the sanitary napkin in the lengthwise direction (actual flat plate 5) No. 62228) is disclosed. However, this method has a problem that a sufficient space cannot be formed under the surface sheet when the expansion and pressure contact with the wearer's skin is moderate.

As a means for accommodating excrement, a method of directly providing an opening on the first surface sheet has been disclosed (Shokai Sho 5).
No. 7-162305, No. 1-94403, No. 4-42814. However, when there is no space under the surface sheet, the excrement is not stored under the surface sheet but remains on the surface sheet and leaks.

A space is provided between the topsheet and the absorber and an opening is provided on the topsheet. The topsheet and the backsheet having a peripheral dimension larger than the peripheral dimension of the topsheet are joined at the peripheral edge, An absorbent article having an opening (Japanese Patent Laid-Open No. 4-102452) is disclosed.
However, in this method, when the 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, etc., the size of the topsheet is smaller than that of the backsheet. Since it is small, it does not stay on the surface sheet and leaks.

[0011]

In view of the above 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 quickly absorb liquid even in a thin absorbent body in a disposable diaper that is joined by a part, a sufficient space for temporarily retaining the liquid is provided between the surface sheet and the absorbent body, and the absorbent body is provided on the surface sheet. It was concluded that it is important to provide an opening to Furthermore, in order not to leak the highly viscous excrement that hardly penetrates the surface sheet,
A space that can temporarily store excrement is provided in a portion that does not come into contact with the skin of the wearer without reducing the size of the topsheet, and a second opening to the absorber is provided at the buttocks contact part of the back body of the topsheet. It was concluded that the purpose can be achieved by providing the space and storing the excrement in the space under the surface sheet. An object of the present invention is to form a pocket having a first opening on a liquid-permeable topsheet, and provide a space between the topsheet and the absorbent body to prevent excrement flow and leakage, It shows a good absorption rate even when using a thin absorber, and by forming a second opening to the absorber at the part that contacts the buttocks of the topsheet when worn, it has a high viscosity that does not easily penetrate the topsheet. It is an object of the present invention to provide an absorbent article that stores excrement in a space below a surface sheet and does not leak.

[0012]

A first object of the present invention is to provide an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the two sheets. The topsheet and the backsheet are bonded together at their peripheral edges, and at least the crotch-corresponding portion of the topsheet is provided with one or more grooves along the longitudinal direction of the absorbent article. Along with the surface sheet is bent toward the absorbent body, the adjacent areas of the surface sheet are intermittently joined together, and the pocket having the first opening on the surface sheet, and the space between the surface sheet and the absorbent body The second opening is formed by further providing one or more opening lines in the direction perpendicular to the longitudinal direction at the buttocks abutment portion (the portion in contact with the buttocks) of the back body portion of the topsheet. Is characterized by It is an absorbent article. Second of the present invention
Is the absorbent article according to the first invention, wherein two grooves are provided in the crotch portion of the surface sheet. A third aspect of the present invention is that the distance between the grooves is 10 to 10.
The absorbent article according to the first or second invention is characterized by having a length of 200 mm. A fourth aspect of the present invention is the absorbent article according to any one of the first to third aspects, in which elastic bodies are provided on both sides of the groove.
A fifth aspect of the present invention is the absorbent article according to any one of the first to fourth aspects, wherein the second opening is formed by a single opening line. The sixth aspect of the present invention is
The absorbent article according to any one of the first to fifth inventions, wherein a surface sheet on one side divided by an opening line of the second opening is adhered to an absorber.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent article according to the present invention having the above structure, the surfaces of the topsheets face each other at least in the central region along the width direction of the topsheet along the longitudinal direction of the absorbent article. Bend to the absorber side, to form a groove by intermittently joining the regions where the surfaces of the surface sheet are in contact with each other, the groove forming a pocket having a first opening on the surface sheet, Highly viscous and hard-to-absorb excretions can be temporarily stored in a pocket, and by preventing them from leaking, the skin of the wearer can be widely soiled and the wearer's discomfort can be felt. It also does not cause skin irritation. In addition, since a space is formed between the topsheet and the absorbent body, liquids such as urine and body fluids can be quickly transferred from the topsheet to the absorbent body, which is excellent in spite of being a thin and compact absorbent article. Has liquid absorbency. Further, by providing the second opening in the portion of the back body of the topsheet that contacts the buttocks, it is possible to store excrement in the space under the topsheet, which is effective in preventing leakage of highly viscous excrement. is there.

The surface sheet used in the present invention is
It is a hydrophilic or hydrophobic non-woven fabric, woven fabric, porous plastic film, etc., and its constituent fibers are monofilaments such as polypropylene, polyethylene, polyester and nylon, or two or more components such as polyester, polypropylene, polyethylene and nylon. In particular, composite fibers of polyester / polyester, polyester / polyethylene, polypropylene / polyethylene are preferable from the viewpoint of strength, but are not particularly limited.

The size of the topsheet may be the same as or larger than the backsheet. Further, the topsheet does not have to be composed of a single sheet, and may be composed of a plurality of sheets such that the upper surface of the absorbent body and the side flaps are replaced. Also, when a top sheet is composed of multiple sheets, each sheet may use a different material,
The same material may be used.

The back sheet used in the present invention is
It is made of a liquid impermeable film such as polyethylene, a liquid impermeable film and a non-woven fabric, or a material obtained by laminating a woven fabric.

The absorbent used in the present invention is formed of cotton-like pulp, SAP, hydrophilic sheet, etc., which are particularly limited, which of them is adopted and how they are combined. is not. The absorbent body is also made of known absorbent materials commonly used in conventional 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, the one in which SAP is uniformly mixed in each mat, or the one arranged in a layer between the mats is used. The absorbent body formed of such a single-layer or multi-layer mat may be mixed with 3 to 60% by weight of a heat-fusible substance with respect to the cotton-like pulp and subjected to thermocompression bonding. Alternatively, only the SAP may be wrapped with a hydrophilic sheet.

The cotton-like pulp is preferably one having a fiber length of 5 mm or less obtained by defibrating a chemical pulp sheet or a mechanical pulp sheet with a crusher. As the pulp raw material, not only softwood but also hardwood, straw, bamboo and kenaf 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 / m ² .

Examples of SAP include starch type, cellulose type and synthetic polymer type. That is, starch-acrylic acid (salt) graft copolymer, saponification product of starch-ethyl acrylate graft copolymer, starch-
Saponified Methyl Methacrylic Acid Graft Copolymer, Saponified Starch-Acrylonitrile Graft Copolymer, Saponified Starch-Acrylamide Graft Copolymer,
Starch-acrylonitrile-2-acrylamide-2
-Saponification product of methyl propane sulfonic acid graft copolymer, 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 reaction product For example, the weight is 20
It absorbs more than twice as much urine, body fluid and water, and sodium polyacrylate type is most suitable from the viewpoint of absorption performance. The compounding amount of SAP is 10 to 500 parts by weight, preferably 15 to 3 parts by weight based on 100 parts by weight of dried cotton-like pulp.
00 parts by weight, and such an amount of SAP is substantially evenly distributed in the cotton-like pulp. In such a state S
When AP absorbs urine or body fluid and swells, their mutual interference is minimized, and they rarely contact each other continuously to form a permeation barrier. Permeate urine or body fluid in three-dimensional directions. ,Absorb.

The hydrophilic sheet may be a hydrophilic sheet such as tissue, absorbent paper, hydrophilic non-woven fabric or the like. As a method for compressing the absorbent body, a roll having a smooth peripheral surface may be used to compress the absorbent body into a continuous surface shape so that the density of the absorbent body becomes substantially uniform, or the peripheral surface may be uneven. The density of the absorber 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 longitudinal direction and the oblique direction. In the case of embossing, the compressed part and the non-compressed part may be continuous or discontinuous.

The shape of the absorbent body may be a rectangular shape or an hourglass shape, or may be any of the known shapes that are commonly used in conventional absorbent diapers and other absorbent articles, and is not particularly limited.

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, etc., without reducing the absorption rate of urine, body fluid, etc.,
It becomes possible to prevent leakage of urine, body fluids and the like.

The diffusion layer is a hydrophilic liquid-permeable non-woven fabric, woven fabric, porous plastic, cotton-like pulp, etc., and its constituent component may be polypropylene, polyethylene, polyester, rayon, pulp or a composite fiber thereof. , Not particularly limited. The diffusion layer is disposed between the topsheet and the absorber, and is adhesively fixed to the absorber with an adhesive or the like.

It is preferable that the absorbent article is provided with a three-dimensional gather for preventing leakage from the side portion thereof.

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 a bonding method, hot-melt, starch-based or water-soluble glue such as CMC (carboxymethyl cellulose), or a highly fluid adhesive may be used,
It may be welded by heat or ultrasonic waves.

[0026]

EXAMPLES 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 to these examples. FIG. 1 is a partially cutaway developed plan view of the diaper 9 to be used. In FIG. 1, the disposable diaper 9 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 is adhered so as to be integrated at the outer circumference (periphery). The absorber 3 is partially or entirely bonded and fixed to the back sheet 2. Further, outside the both side portions in the width direction of the absorbent body 3, the front and back double-sided sheets are extended to form side flaps on both sides. Since there is a region where the topsheet 1 and the absorber 3 are not adhered to each other, two grooves 4 are formed by intermittently joining each other along the longitudinal direction of the diaper when used and the above-mentioned groove 4 is formed. A pocket 7 (see FIG. 3) having eight first openings 6 is formed in the.
Further, the topsheet 1 has one elongated opening line 13 provided in the buttocks contact portion of the back body portion in a direction perpendicular to the longitudinal direction to form a second opening portion 14.

Although not shown in the drawing, it is preferable that the leg stretches between the top sheet 1 and the back sheet 2 forming the flap portion in order to prevent leakage of exudate from around the leg during wearing. The elastic body is arranged in a stretched state. Furthermore, in order to improve the fit of the wearer's waist and prevent leakage of exudates from the waist, the back flap is preferably provided with a waist elastic elastic member in the stretched state. Further, a fastening tape 17 is provided on the back flap portion so that the wearer can easily attach and detach the diaper 9 to use.

By forming the second opening 14 in the buttocks abutting portion of the back body surface sheet which contacts the wearer's anus, the top sheet 1 and the absorbent body are kept without leaving excrement on the surface sheet 1. It is possible to store in the space 8 between 3 (refer FIG. 4). The shape of the second opening 14 in the drawing is an ellipse, but it may be a square and does not particularly define the shape. The size of the second opening 14 is such that the excrement is placed on the topsheet 1.
In order to store it in the space 8 between the absorbent body 3 and the absorbent body 3, there is no particular limitation as long as it has a size capable of containing excrement. In addition, the peripheral edge of the second opening 14 may be subjected to a treatment such as folding back the topsheet 1 or wrapping it with another member. A stretchable elastic body may be arranged in a stretched state at the vicinity of the second opening 14. The absorber 3 may be directly below the second opening 14, but in order to improve the feel when the wearer takes a posture of crushing the space 8 in the second opening 14, It is preferable that the surface sheet 1 having a size equal to or larger than that of the second opening 14 is present below the second opening 14 and adhered to the absorber 3.

Although two grooves 4 are provided in the drawing, the grooves 4 are
One may be sufficient, and it can be provided as long as it can be installed in an absorbent article. When a plurality of grooves 4 are provided in the absorbent article, the length of each groove 4 need not be constant. Further, both edges of each groove 4 may be in contact with each other or may be separated from each other. Each groove 4
The mutual spacing is preferably 10 mm or more and 200 mm or less, and the spacing between the grooves 4 does not have to be constant. Furthermore, the length of the groove 4 is not less than 3 mm and not more than the length in the length direction of the absorbent article. Further, the groove 4 may be a straight line parallel to the longitudinal direction, or may be a curved line, and the grooves may be parallel or may not be parallel, and are not particularly limited. Groove 4
Although eight first opening portions 6 are provided in the drawing, they may be provided one and may be provided as long as they can be installed in the groove 4. The size of the first opening 6 is 3 mm or more and less than the longitudinal length of the absorbent article along the longitudinal direction, and preferably 5 mm or more and 50 mm.
It is as follows. In the drawing, the distance between the adhesive parts 5 is constant,
The interval between the first openings 6 is also constant, but especially the first openings 6
Does not have to be constant in size.

FIG. 2 is an example of a developed plan view before the bonding portion 5 of the topsheet 1 of the disposable diaper 9 shown in FIG. 1 is bonded. In FIG. 2, the topsheet 1 and the backsheet 2 are formed to have the same length and width as a whole, the topsheet 2 is superposed on the backsheet 3, and the whole is bonded so that they are integrated at their outer peripheries (peripheries). Has been done. With respect to the pocket 7 having the first opening 6 formed in the topsheet 1, the surfaces of the topsheet 1 (the surfaces to be the inner surfaces of the grooves 4) are formed with the groove side edge fold line 11 with the fold line 10 as the center. It is formed by intermittently adhering to each other at the adhering portion 5 so that the 12 contact each other. In this figure, the adhesive portion 5 is a point on the groove side edge bending lines 11 and 12, but these two points may be a straight line that extends over the groove side edge bending lines 11 and 12. When the adhesive portion 5 is a point, the pockets 7 formed in the groove portion 4 are connected to form one large pocket, but when the adhesive portion 5 is a straight line, the pocket 7 is divided by the adhesive portion 5, It becomes an independent storage unit. in this way,
The pockets 7 may be independent for each of the first openings 6, or may be connected under the adhesive portion 5.

Further, in FIG. 2, the groove side edge bending line 11
The distance between and 12 is 5 mm or more and less than the width of the absorbent article, and preferably 10 mm or more and 100 mm or less. Further, the groove side edge bending lines 11 and 12 may be straight lines as shown in FIG. 2 but may be curved lines. Therefore, the depths of the pockets 7 may be uniform or non-uniform and are not particularly specified. Further, when a plurality of grooves 4 are formed, each groove 4
The size of the lower pocket 7 may be uniform or non-uniform.

FIG. 3 shows the XX 'of the disposable diaper of FIG.
It is a line sectional view. In FIG. 3, an absorber 3 is arranged between a liquid-permeable topsheet 1 and a liquid-impermeable backsheet 2. The absorber 3 is partially or entirely bonded and fixed to the backsheet 2 with an adhesive or the like. The topsheet 1 and the backsheet 2 are also bonded to each other at their side edges. The topsheet 1 is folded in the central region along the width direction so that the topsheets 1 face each other along the longitudinal direction of the diaper, and the adhesive portions 5 are intermittently formed in the regions where the topsheets 1 are in contact with each other. By adhering at, the pocket 7 having the first opening 6 is formed below the groove 4. Further, since there is a region where the topsheet 1 and the absorber 3 are not adhered to each other, the pocket 7 is formed so that the space 8 is formed between the topsheet 1 and the absorber 3.

In the present invention, an elastic body may be arranged near the groove 4. By disposing the elastic body in a stretched state at the near edge of the groove 4, the first opening 6 formed on the groove 4 is formed.
The contraction of the elastic body makes it easier to open, and it becomes easier to store excrement.

FIG. 4 is a sectional view taken along the line YY 'of FIG.
In FIG. 4, in each of the topsheets 1 on both sides of the opening line 13 of the second opening 14, the sheet side closer to the adhesive portion 5 of the groove 4 is farther from the absorber 3 and the other one farther from the adhesive portion 5 is. The second opening 14 is formed between the sheet and the seat side. In the drawing, the second opening 14 is formed by providing one opening line 13 in the direction perpendicular to the longitudinal direction of the topsheet 1, but it is also possible to form the second opening 14 by two topsheets. When
There may be a superposed portion of the surface sheets 1. Also, the topsheet 1 having the second opening 14 formed therein.
The bent portion 15 (see FIG. 5) may be formed on the free edge of the elastic body, and the elastic elastic body may be arranged in the stretched state on the edge near the second opening 14.

FIG. 5 is a sectional view taken along line YY ′ in FIG. 1 different from FIG. 4 in which one of the topsheets 1 forming the second openings 14 is bonded to the absorber 3. In FIG. 5, in each surface sheet 1 forming the second opening 14, the sheet side closer to the adhesive portion 5 of the groove 4 is farther from the absorber 3,
The second opening 1 is provided between the adhesive sheet 5 and the other sheet side farther from the adhesive sheet 5.
4 is formed, and a part of the groove 4 on the sheet side far from the adhesive portion 5 is adhered to the absorber 3. By adhering a part of the topsheet 1 to the absorbent body 3 in this way, the second opening 14 is further opened, and it becomes easier to store excrement. In the drawing, only one surface sheet 1 forming the second opening 14 is adhered to the absorber 3, but both surface sheets 1 may be adhered to the absorber 3. Further, a stretchable elastic body may be disposed in a stretched state near the second opening 14.

FIG. 6 is a plan view in which the space 8 is not formed under the one surface sheet 1 in which the second opening 14 is formed.
FIG. 6 is a sectional view taken along line YY ′ of FIG. 1 different from FIG. 5. In FIG. 6, one of the topsheets 1 forming the second opening 14 does not have the groove 4 formed therein, nor has the space 8 formed between it and the absorber 3. The topsheet 1 that does not form the space 8 with the absorber 3 may be partially or entirely adhered to the absorber 3, but may not be adhered, and is not particularly limited. Although the back surface sheet 1 is adhered to the absorbent body 3 in the drawing, it may be on the ventral side.

FIG. 7 is a developed plan view of a disposable diaper showing another embodiment different from FIG. 1 in which two opening lines 13 are provided in the direction perpendicular to the longitudinal direction of the topsheet 1. In FIG. 7, the surface sheet 1 is provided with two opening lines 13 in a direction perpendicular to the longitudinal direction, and the groove 4 is not formed in the sheet between both opening lines 13. Further, this sheet does not form the space 8 between itself and the absorber 3, and forms a large second opening 14 between both sheets forming the groove 4.

FIG. 8 shows the ZZ 'of the disposable diaper of FIG.
It is a line sectional view. In FIG. 8, the topsheet 1 is provided with two opening lines 13 in a direction perpendicular to the longitudinal direction, and the topsheet between the opening lines 13 forms a space 8 with the absorber 3. The large second opening 1 is formed between the two topsheets that form the space 8 with the absorber 3.
4 are formed. The top sheet between the opening lines 13 is
The absorbent body 3 may be partially or entirely adhered, but may not be adhered. The second opening 14 can be formed by providing the opening line 13 on the topsheet 1,
The topsheets 1 forming the second openings 14 may be formed by being overlapped with each other. The bent portion 15 may be formed on the surface sheet 1 of the second opening portion 14, and the elastic elastic body may be disposed in a stretched state at the edge near the second opening portion 14.

In the absorbent article of the present invention, the second opening 14 may be present alone as shown in FIG. 1, but it may be plural as shown in FIG. The number of the second openings 14 is not particularly limited.

Further, the absorber 3 is placed in the pocket 7 below the groove 4.
May be provided with a third opening. The third opening to the absorber 3 formed under the groove 4 may be one, but may be plural. The shape of the third opening may be circular, but may be a slit formed along the groove 4 and is not particularly limited.

[0041]

As described above, in the absorbent article of the present invention, one or more grooves are provided in the longitudinal direction in at least the crotch-corresponding part of the top sheet. Are formed so as to be opposed to each other on the absorber side, and the regions where the surfaces of the surface sheets forming the grooves contact each other are intermittently joined to form a pocket having a first opening on the surface sheet. This makes it possible to temporarily store excrement, which is highly viscous and difficult to absorb, in the pocket.By preventing these substances from leaking, the skin of the wearer can be widely soiled and the wearer can feel discomfort. Or
It also does not cause skin irritation in infants. In addition, since a space is formed between the topsheet and the absorbent body, liquids such as urine and body fluids can be quickly transferred from the topsheet to the absorbent body, which is excellent in spite of being a thin and compact absorbent article. Has liquid absorbency. Furthermore, by providing a second opening in the buttocks contacting part of the back body of the surface sheet,
The excrement can be stored in the space under the surface sheet, which is effective in preventing leakage of highly viscous excrement.

[Brief description of drawings]

FIG. 1 is a partially cutaway developed plan view of a disposable diaper of the present invention.

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

FIG. 3 is a sectional view taken along line X-X ′ of the disposable diaper of FIG. 1.

FIG. 4 is a cross-sectional view of the disposable diaper of FIG. 1 taken along the line Y-Y ′.

5 is a cross-sectional view taken along line YY 'of the disposable diaper of FIG. 1 showing another embodiment different from FIG.

6 is a cross-sectional view taken along line YY 'of the disposable diaper of FIG. 1 showing an embodiment different from those of FIGS. 4 and 5. FIG.

FIG. 7 is a plan view showing an embodiment of the disposable diaper of the present invention different from that of FIG.

8 is a sectional view taken along line Z-Z 'of the disposable diaper of FIG.

[Explanation of symbols]

 1. Liquid permeable top sheet 2. Liquid impermeable back sheet 3. Absorber 4. Groove 5. Adhesive part 6. First opening 7. Pocket 8. Space 9. Used diapers (absorbent articles) 10. Bending line 11. Groove side fold line 12. Groove side fold line 13. Opening line 14. Second opening 15. Bent part 16. Adhesive part to absorber 17. Fastening tape

Claims (6)

[Claims] 1. An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets, wherein at least the crotch-corresponding portion of the top sheet is present. One or more grooves are provided along the longitudinal direction of the absorbent article, and the grooves are formed by bending the surface sheet toward the absorber along the longitudinal direction and intermittently joining the contacting regions of the surface sheet. The top sheet has a pocket having a first opening, and a space between the top sheet and the absorbent body is formed.Furthermore, the buttocks abutment portion of the back body of the top sheet is formed at a right angle to the longitudinal direction. An absorbent article, wherein the second opening is formed by providing one or more opening lines in the direction. 2. The absorbent article according to claim 1, wherein two grooves are provided in the crotch portion of the surface sheet. 3. The absorbent article according to claim 1, wherein the distance between the grooves is 10 to 200 mm. 4. The absorbent article according to any one of claims 1 to 3, wherein elastic bodies are provided on both sides of the groove. 5. The absorbent article according to any one of claims 1 to 4, wherein the second opening is formed by one opening line. 6. The surface sheet on one side divided by the opening line of the second opening is adhered to the absorber. Absorbent article.