JPH10323370A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article which is highly effective in preventing leakage from every position in particular from the crotch part. SOLUTION: This absorptive article has a pocket sheet 15 whose outer side edges in the width direction are connected to a liquid permeable top sheet 13 in the longitudinal direction of an absorbent body 14 inserted between the top sheet 13 and a non-permeable back sheet 12, and a slit extending in the longitudinal direction is formed at the center in the width direction on the pocket sheet 15. A connecting part 24r is formed by connecting both edges in the longitudinal direction of the pocket sheet 15 to both edges in the longitudinal direction of the absorbent body 14, and an opening 25 is formed by separating edges of the slit on the pocket sheet 15 from each other. The straight lined length from the connecting part of one end in the longitudinal direction of the absorbent body 14 and the pocket sheet 15 to the connecting part of the other end is shorter than the length of the absorbent body 14 from the connecting part of one end of the absorbent body 14 and the pocket sheet 15 to the connecting part of the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article that can prevent urine and excrement from leaking from any position.

[0002]

2. Description of the Related Art Conventionally, in an absorbent article for treating excretions such as urine, menstrual blood and stool, if the excretion is discharged at a speed higher than the absorption rate of the absorber, or if the stool is absorbed with high viscosity. When excretion is difficult, the absorbent body cannot absorb the excretion and may leak from the central portion or the back and abdomen of the absorbent article.

In order to eliminate these leaks, Japanese Patent Publication No. 6-93901 proposes an absorbent article in which elastic barrier cuffs are arranged at both ends in the longitudinal direction. This absorbent article rises from the side of the absorber,
It has a so-called three-dimensional gather, and the three-dimensional gather prevents leakage of excrement.

Japanese Patent Application Laid-Open No. 64-26701 discloses a structure in which a flap is provided on the back and abdomen in order to eliminate leakage of the absorbent article from the back and abdomen.

Further, Japanese Patent Laid-Open No. 5-305109,
JP-A-5-277149, JP-A-6-21623
JP, JP-A-6-11723, JP-A-5-28
Japanese Patent No. 5168 discloses an absorbent article in which a second top sheet having an opening is provided at the top of the absorbent article in order to prevent leakage from both the central portion and the back and abdomen. This absorbent article has a so-called pocket structure, and the integral second top sheet rising from the absorber functions as a barrier in all directions so that the excrement discharged in the first top sheet does not leak out. Plays.

On the other hand, Japanese Patent Application Laid-Open No. 3-59 discloses a structure in which a part of a three-dimensional gather is adhered to a side portion of an absorber so that the three-dimensional gather can be reliably raised. The three-dimensional gather of this absorbent article is not only caused by the expansion and contraction of the elastic body arranged at its free edge,
The rise of the absorbent body also occurs due to the difference in the longitudinal dimension between the three-dimensional gather and the absorbent body, thereby preventing leakage from the central part in the longitudinal direction of the absorbent article.

[0007]

[Problems to be Solved by the Invention] Japanese Patent Publication No. Hei 6-93901
The device disclosed in Japanese Patent Application Laid-Open No. H11-157400 cannot prevent the absorbent article from leaking from the back and abdomen. Also, depending on the posture of the wearer, there is a problem that the three-dimensional gathers of the absorbent article are crushed and do not rise from the absorber, so that leakage cannot be prevented.

Further, in the device disclosed in JP-A-64-26701, the flap is effective only for preventing the absorbent article from leaking from the back and abdomen, and cannot prevent the absorbent article from leaking from the central portion. . In addition, depending on the posture of the wearer, the flap may be crushed, and excrement may leak beyond the flap.

Further, Japanese Patent Application Laid-Open No. 5-305109,
JP-A-5-277149, JP-A-6-21623
JP, JP-A-6-11723, JP-A-5-28
In the device disclosed in Japanese Patent No. 5168, it is desirable to dispose an elastic body all around the pocket in order to improve the rising of the second top sheet. In addition, the production speed of the absorbent article is reduced, and the production cost is increased. on the other hand,
When the elastic body is arranged only in the longitudinal direction of the absorbent article, the production is easy, but it is difficult to make the height of the second top sheet at the back and abdomen high enough. In any case, the production speed is reduced due to cutting and removing the sheet in the pocket portion of the second top sheet. Furthermore, in the case of a structure in which the second top sheet rises only by the elastic body or the contractility of the sheet, the second top sheet forming the pocket is not crushed by the posture of the wearer and rises, so that the barrier for excrement is not formed. There is also a problem that it cannot fulfill its role. When a pocket is formed by superposing two S-shaped cut sheets, a superimposed portion of the sheets is formed in the back and abdomen, and the back and abdomen are thickened. There was also a problem that the steel became hard.

On the other hand, the one disclosed in Japanese Patent Application Laid-Open No. 3-59 cannot prevent excretion from leaking from the back and abdomen of the absorbent article.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an absorbent article which has a high effect of preventing leakage from any position, particularly from a crotch portion.

[0012]

According to a first aspect of the present invention, there is provided a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber disposed between the topsheet and the backsheet. And a pocket sheet arranged along the longitudinal direction of the absorbent body and having a widthwise outer side edge joined to the top sheet, the absorbent article comprising: Both ends are joined to both ends in the longitudinal direction of the absorber, and a slit extending along the longitudinal direction is formed at the center in the width direction of the pocket sheet. Joints are provided, each having a central portion folded back to the outside thereof and joined to each other, thereby forming openings that separate the edges of the slits of the pocket sheet from each other. The linear distance from the joint between the absorber and one longitudinal end of the pocket sheet to the joint at the other end is different from the joint between the absorber and one longitudinal end of the pocket sheet to the other end. The absorbent article is characterized in that the length is set shorter than the length of the absorber reaching the joint portion on the side.

A second embodiment of the present invention provides a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between the top sheet and the back sheet, An absorbent article comprising a pocket sheet arranged along the longitudinal direction of the body and having a widthwise outer side edge joined to the top sheet, wherein both end portions in the longitudinal direction of the pocket sheet are: Joined to both ends of the absorber in the longitudinal direction, a slit is formed at the center in the width direction of the pocket sheet, and extends along the longitudinal direction thereof. A joint portion that is folded back to the outside of the widthwise outer side edge portion and joined to the top sheet is provided, whereby the edge of the slit of the pocket sheet is formed. Openings spaced apart from each other are formed, and a linear distance from a joining portion between the absorber and one end in the longitudinal direction of the pocket sheet to a joining portion on the other end is one longitudinal end of the absorber and the pocket sheet. An absorbent article characterized in that the length is set to be shorter than the length of the absorber from the joint portion with the side to the joint portion on the other end side.

According to the present invention, the outer side edge of the pocket sheet in the width direction is joined to the top sheet along the longitudinal direction, and both ends in the longitudinal direction are joined to both ends in the longitudinal direction of the absorber. Since the central portion in the longitudinal direction of the pocket sheet is folded back to the outside thereof and joined to each other, and the longitudinal dimension is set shorter than the longitudinal dimension of the absorber,
The absorber is surrounded by the pocket sheet, and the edges of the slits of these pocket sheets are separated from each other to form an opening, which rises from the peripheral edge of the absorber to form a weir, and the entire pocket structure is formed. To form

Therefore, regardless of the posture of the wearer, the excrement of the wearer is received by the absorber through the opening, and the leakage of the excrement not only from the crotch portion but also from the back and abdomen is reliably prevented by the weir described above. Is done.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent article according to the first and second aspects of the present invention, an elastic member may be arranged at the edge of the slit of the pocket sheet along the opening. Thereby, the tendency of the edge of the slit of the pocket sheet to rise from the peripheral edge of the absorber is further strengthened.

Further, the pocket sheet may be formed of an elastic member. In this case also, the tendency of the edge of the slit of the pocket sheet to rise from the peripheral edge of the absorber by utilizing the contracting force of the elastic member. Is strengthened.

Further, auxiliary sheets may be further provided on both ends of the pocket sheet in the longitudinal direction.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the absorbent article according to the present invention is applied to an expandable diaper will be described in detail with reference to FIGS. 1 to 11, but the present invention is not limited to such an expandable diaper. .

As shown in FIG. 1 showing the appearance of this embodiment, FIG. 2 showing its plan shape, and FIG. 3 showing its cross-sectional structure taken along the line III-III, the deployable diaper 11 of this embodiment is
The liquid-impermeable back sheet 12 and the back sheet 1
Liquid-permeable topsheet 13 superimposed on 2
And an absorber 14 disposed between the top sheet 13 and the back sheet 12, and disposed so as to cover the absorber 14, and the side edges on the widthwise outer side and both ends in the longitudinal direction are arranged on the topsheet. Pocket seat 15 joined to 13
A pair of side flap portions 16 and 17 formed by a top sheet 13 and a back sheet 12 extending outward from both side edges in the width direction of the absorber 14, and extending from one longitudinal end of the absorber 14 Waist elastic member 19 for forming a waist gather 18 which is sandwiched between the top sheet 13 and the back sheet 12 to be worn to improve the fit around the waist when worn, and the both side edges of the absorber 14 in the width direction. Leg elastic member 21 for forming leg gathers 20 sandwiched between the top sheet 13 and the back sheet 12 forming the outer side flap portions 16 and 17 and improving the fit around the legs when worn. Is attached to both side edges in the width direction of the side flap portion 16 on one end side, and is overlapped with the side flap portion 17 on the other end side to connect them. Right pair of fastening tapes 22
And

At the center of the pocket sheet 15 in the width direction,
Slit 23 extending along the longitudinal direction (see FIG. 4)
Are formed, and a pair of joints 2 formed at the center portion along the width direction near the side edge on the width direction outside of the pocket sheet 15.
The edges of the slits 23 of the pocket sheet 15 are separated from each other by 4 _R and 24 _L to form the opening 25.

Although the waist elastic member 19 is arranged only on one end in the longitudinal direction of the absorber 14, it may be arranged on the other end in the longitudinal direction. Further, the leg-surrounding elastic members 21 are provided only at the central portion along the width direction of the diaper along the longitudinal direction outside the both side edges of the absorber 14, and both side edges of the side flap portions 16, 17 in the width direction are provided. Has a pair of cutouts 26 for forming an opening around the leg when worn.

Further, the fastening tape 22 can be repeatedly peeled off from the base tape 27 (see FIG. 2) joined to the top sheet 13.

The above-mentioned top sheet 13 is formed of a hydrophilic or hydrophobic non-woven fabric, woven fabric, porous plastic film or the like, and is made of fibers such as polypropylene, polyethylene, polyester, nylon, or polyester, polypropylene, polyethylene, nylon. And the like can be composed of a composite fiber or the like obtained by combining two or more types. In particular, polyester / polyester, polyester / polyethylene and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are not limited thereto.

The back sheet 12 can be formed of a liquid-impermeable film such as polyethylene or a laminate of a liquid-impermeable film and a nonwoven fabric or woven fabric. It is preferable to use a material having

The absorber 14 is formed of a known absorbent material used for an already known absorbent article. That is,
The absorbent fibers such as cotton-like pulp and rayon are made into a mat shape, and the SAP is uniformly dispersed or arranged in a layer form. The SAP is wrapped with a hydrophilic sheet, or the SAP is wrapped with a hydrophilic sheet. be able to. In the case of the absorbent body 14 having floc pulp, 3 to 6
0% by weight of a heat-fusible substance may be mixed, and these may be thermocompression-bonded.

The above-mentioned cotton-like pulp preferably has a fiber length of 5 mm or less obtained by defibrating a chemical pulp sheet or a mechanical pulp sheet with a crusher. The raw material for the pulp is not limited to softwood, but hardwood, straw, bamboo, kenaf, and used paper pulp can also be used. The amount of the cotton-like pulp used depends on the structure of the absorber 14, for example,
Although it depends on whether the cotton-like pulp is used alone, a plurality of the pulp are used, or another material such as SAP is used in combination, generally 50 to 400 g / m ² is appropriate.

As the SAP, starch, cellulose, and synthetic polymer can be used. Specifically, starch-acrylic acid (salt) graft copolymer, saponified starch-ethyl acrylate graft copolymer, saponified starch-methyl methacrylate graft copolymer, starch-acrylonitrile graft copolymer Crosslinked with saponified product of starch, saponified product of starch-acrylamide graft copolymer, saponified product of starch-acrylonitrile-2-acrylamido-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, acrylic acid Such as polyethylene oxide, crosslinked products of sodium carboxymethyl cellulose, and crosslinked products of polyvinyl alcohol-maleic anhydride reactant. In particular, those based on sodium polyacrylate,
It is most suitable because it absorbs urine, bodily fluids and water more than 20 times its own weight. The amount of the SAP used is 10 to 500% by weight, preferably 15 to 300% by weight based on the total weight of the dry cotton-like pulp, and is substantially uniformly distributed in the cotton-like pulp. It is valid. When the absorbent body 14 is compression-molded, the surface is formed into a smooth shape so that the density becomes uniform, or embossing is performed on the surface to guide urine or body fluid in the vertical direction and the oblique direction, and the density is partially reduced. You may make it different.

Further, as the above-mentioned hydrophilic sheet,
Tissue, absorbent paper, hydrophilic nonwoven fabric, etc. can be used.

A diffusion layer formed of a hydrophilic and liquid-permeable nonwoven fabric, woven fabric, porous plastic, cotton-like pulp, or the like may be provided between the top sheet 13 and the absorber 14. By providing this diffusion layer, it is possible to prevent the leakage of urine and body fluid without lowering the absorption rate. This diffusion layer can be made of fibers such as polypropylene, polyethylene, polyester, rayon, and pulp, or can be made of these composite fibers, and is fixed to the absorber 14 using an adhesive or the like. .

As described above, the joints 24 _R and 24 _L extending along the longitudinal direction are provided at the central portion along the width direction of the pocket sheet 15, that is, at the portion corresponding to the crotch portion of the wearer.
Are formed respectively. These paired joints 2
4 _R and 24 _L fold the edge of the slit 23 of the pocket sheet 15, that is, the free end 28 side, outwardly in the width direction at the folded portion 29, and extend a part of the mutually overlapping surfaces along the longitudinal direction. It is formed by joining linearly. This joint allows the pocket seat 15
An opening 25 is provided in the pocket sheet 15, the longitudinal dimension of the pocket sheet 15 is set shorter than the longitudinal dimension of the absorber 14, and the absorber 14 is urged in an arc shape. As a result, the pocket sheet 15 rises from the absorber 14 and the weir 32
To form In this embodiment, the joints 24 _R and 24 _L
Is formed in a continuous straight line corresponding to the position of the crotch portion of the wearer, but may be arranged in a curved line or intermittently in a broken line, and formed over the entire length of the slit 23. You may.

The free end 28 of the pocket sheet 15
The elastic member 30 is joined with the elastic member fixing tape 31 in an extended state. The elastic member 30 further reduces the distance between the one end and the other end in the longitudinal direction of the absorber 14, and urges the absorber 14 in an arc shape, so that the free end 28 of the pocket sheet 15 is Can be steeply raised from the absorber 14, and a weir 32 is formed at this portion.

In the present embodiment, the slit 23 is formed in the center of the pocket sheet 15 in the longitudinal direction. However, the slit 23 may be formed so as to be biased toward the back or the abdomen of the deployable diaper 11, preferably the abdomen. It is leaning to the side. Further, the length is generally about 4/10 to 9/10 of the dimension along the longitudinal direction of the absorber 14. If this is less than 4/10 of the dimension along the longitudinal direction of the absorber 14, the opening 25 becomes too small and excrement is
On the other hand, if it exceeds 9/10 of the dimension along the longitudinal direction of the absorber 14, there is a possibility that the effect of preventing leakage from the dorsal side or the abdominal side may be insufficient. Also,
The slits may be formed by dividing into a plurality of straight lines.

The elastic member 30 is preferably arranged over the entire periphery of the opening 25, that is, over the entire side edge of the slit 23. In this embodiment, one elastic member 30 is provided at each free end of the pocket sheet 15. Although it is joined to the portion 28, it is also possible to join a plurality of elastic members 30 together with the elastic member fixing tape 31. The elastic member fixing tape 31 may be made of the same material as the pocket sheet 15.

Alternatively, the elastic member 30 can be arranged around the opening 25 without using the elastic member fixing tape 31. In this case, the elastic member 30 is sandwiched by folding the free end portion 28 of the pocket sheet 15 inward or outward, and is entirely or partially joined to the sandwiched portion to fix the elastic member 30.

In this manner, the free ends 28 at the central portion along the width direction of the pocket sheet 15 are separated from each other,
Further, the opening 2 is separated from the surface of the top sheet 13.
5 and a weir 32 bordering the opening 25 are formed.

As a method of easily realizing the structure of this embodiment, FIG. 4 showing the appearance before forming the joints 24 _R and 24 _L and FIG. 5 showing the sectional structure taken along the line VV of FIG.
As shown in FIG. 2, a pair of adhesive portions 24 _RO , 24 _RI ,
24 _LO , 24 _LI are provided, and these bonded portions 24 _RO , 24 _RI ,
24 _LO and 24 _LI are overlapped and joined to each other to form the joints 24 _R and 24 _L described above.
5, the folded portion 29 and the weir 32 can be formed.

That is, the joining portion 2 is
4 _R , 24 _L to form the pocket sheet 1
The linear distance from the joint portion with the top sheet 13 at one end in the longitudinal direction to the joint portion with the top sheet 13 at the other end in the longitudinal direction of the pocket sheet 15 is equal to the joint distance with the top sheet 13 at the one end in the longitudinal direction. 14 extending from the portion to the joining portion with the top sheet 13 at the other end in the longitudinal direction
Is set to be shorter than the length, the absorber 14 is curved in an arc shape such that the distance between one end and the other end in the longitudinal direction is shortened.
Rises from the absorber 14. Further, by providing the elastic member 30 at the free end portion 28 of the pocket sheet 15 and functioning as the weir 32, the absorber 14 is moved so that the distance between one end and the other end in the longitudinal direction of the absorber 14 is shortened. As a result of being urged in an arc shape, the pocket seat 15
Can be steeply raised from the absorber 14.

The height of the weir 32 at the free end 28 of the pocket sheet 15 rising from the joints 24 _R and 24 _L needs to have an appropriate height to prevent leakage from the crotch. Within the range of 5 mm to 100 mm, preferably 20 mm
It is good to set in the range of mm to 60 mm. The height of the weir 32 is 5
If it is less than 100 mm, it will be difficult to obtain the effect of preventing leakage from the crotch portion. Conversely, if it is more than 100 mm, depending on the wearing method and posture of the wearer, the portion of the weir 32 will have the absorber 1
4 and the wearer, there is a possibility that the function of the absorber 14 cannot be exhibited.

The pocket sheet 15 and the elastic member fixing tape 31 used in the present invention include hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, etc.
It can be formed of a liquid impermeable film or a product obtained by laminating these films. Further, a hydrophilic nonwoven fabric or a woven fabric can be used as it is, but it is more preferable to perform a water-repellent treatment, whereby the leakage preventing effect can be enhanced. The fibers constituting the nonwoven fabric and the woven fabric may be fibers such as polypropylene, polyethylene, polyester and nylon, or composite fibers combining two or more kinds of polyester, polypropylene, polyethylene and nylon. Especially,
Polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are not limited thereto. It is also possible to use an elastic material.

Further, the above-mentioned elastic member 1 around the waist
9. The leg elastic member 21 and the elastic member 30 are made of natural rubber, synthetic rubber, urethane, or the like, and formed into a thread, string, or tape, and are starch-based, water-soluble such as CMC (carboxymethylcellulose). However, it may be fixed by heat welding or ultrasonic welding.

It is also possible to form a three-dimensional gather along the opening 25 by using the folded part 29 of the pocket sheet 15.
May be formed on the outside in the width direction.

The joints 24 _R and 24 _L described above can be efficiently manufactured during the production of the expandable diaper 11, and an example of a manufacturing procedure of such an expandable diaper 11 is shown in FIGS. FIG. That is, the slit 23 is previously inserted in the continuous body 15C of the pocket sheet constituting a part of the continuous body 11C of the unfolded diaper in the state shown in FIG. 4 which is cut along the cutting line D indicated by the two-dot chain line. The pair of elastic members 30 are joined together with the elastic member fixing tape 31 in an extended state, and the bonding portions 24 _RO , 24 _LO set on the continuous body 15C of the pocket sheet are provided on the surface of the continuous body 15C of the pocket sheet. , 24 _RI , 24 _LI (in the illustrated example, the adhesive portions 24 _RO , 24 _{LO on the} outer side in the width direction) are coated with an adhesive (see FIG. 6), and the pocket sheet shown by the dashed line in FIG. Return line L on one side in the width direction of continuum 15
_One side of the continuous body 11C of the deployable diaper along _R (in the figure,
(Right side) is folded in a valley fold. Thus, the junction 24 _R of the pocket sheet continuous body 15C is automatically formed (see FIG. 7). The elastic member fixing tape 31 may be disposed over the entire length of the deployable diaper 11 in the longitudinal direction, or may be only the portion where the elastic member 30 is disposed.

In the same manner, the continuous body of the unfolded diaper 11C
The other side (the left side in the figure) is a continuum of pocket sheet 1
FIG. 7 set at the same distance from the bonded parts 24 _LO and 24 _{LI of} 5C
Among, folded in valley fold along the folding line L _L indicated by the dashed line, the junction 24 _L of the pocket sheet continuous body 15C
Is automatically formed to form a continuous body 11C of an unfolded diaper in a three-fold state as shown in FIG. 8, which is cut along a cutting line D to obtain an unfolded diaper 11, which is further elongated in its length. Fold it in two directions or fold it in three and pack it.
Ship.

When the pocket sheet 15 is formed by such a method, the pocket sheet opening 25 formed has an arc shape while the elastic members 30 of the pocket sheet are linearly arranged along the flow direction of the production line. , Arranged in a curved manner over substantially the entire pocket opening, thus enabling the manufacture of a deployable diaper which is easy to manufacture but has a high pocket effect.

In the embodiment described above, the top sheet 13 is constituted by a single sheet. However, the center top sheet to be superimposed on the absorber 14 and the side flap portions 16, 1
The top sheet 13 may be constituted by a pair of side top sheets forming the sheet 7. In this case, the center top sheet and the side top sheet may be made of different materials, but may be made of the same material.

FIG. 9 shows a cross-sectional structure similar to FIG. 3 in another embodiment of the absorbent article according to the present invention. Elements having the same functions as those in the previous embodiment are denoted by the same reference numerals. Stop and duplicate description will be omitted. That is, the side edge portions in the width direction outside of the absorber 14 to cover the center top sheet 13 _C, the pair of side topsheet 13
Side edges on the inner side in the width direction of _S are overlapped and integrally joined to form a top sheet. The leg-surrounding elastic members 21 for forming leg gathers are
It is joined between the 2 and the side topsheet 13 _S. Widthwise outer edges of the pocket sheet 15 is bonded to the side topsheet 13 _S, the joint 24 further to the outside in this embodiment _R, 24 _L (FIG. 9, the right side of the joint 24 _R
Only shown).

As described above, by separating the positions of the joints 24 _R and 24 _L from the absorber 14, the opening 25 can be further expanded, and this can be used as a reservoir for excrement.

In the above-described embodiment, the pocket sheet 15
Junction 24 _R, 24 _L and is formed on the top sheet 13 or the side topsheet 13 on _S, these joints 2
4 _R, can be formed away 24 _L from the top sheet 13 or the side topsheet 13 _S.

FIG. 10 shows a cross-sectional structure of still another embodiment of the absorbent article according to the present invention. Elements having the same functions as those of the previous embodiment are denoted by the same reference numerals.
Duplicate description will be omitted. That is, FIG.
Is a sectional view corresponding to FIG. 3 in the previous embodiment,
The width dimension of the top sheet 13 is set to be short, a side flap portion is formed by the outer side in the width direction of the pocket sheet 15 and the back sheet 12, and the leg-around elastic member 21 is sandwiched. Joints 24 _R , 24 of the pocket seat 15
_L (FIG. 10 shows only the right joint 24 _R)
Are formed so as to be shifted inward in the width direction of the pocket sheet 15 from the joint region between the top sheet 13 and the pocket sheet 15, thereby forming the folded portion 29 as a part of the weir 32, and Sheet 13
This can be used as a storage portion by the pocket sheet 15 between them.

The structures of the three embodiments shown in FIGS. 3, 9 and 10 described above can be arbitrarily selected by simply shifting the formation positions of the joints 24 _R and 24 _L along the width direction of the pocket sheet 15. It is possible, and a diaper having such a configuration can be manufactured with almost no modification of the manufacturing equipment.

In order to further enhance the effect of leakage from the back and abdomen of the deployable diaper 11, it is also effective to overlap the auxiliary sheet on both longitudinal ends of the pocket sheet 15.

FIG. 11 shows the appearance of another embodiment of the present invention. Elements having the same functions as those of the previous embodiment are denoted by the same reference numerals, and duplicate description is omitted. Shall be. That is, the auxiliary sheets 33 are overlapped on both ends in the longitudinal direction of the pocket sheet 15 and are integrally joined thereto.

The auxiliary sheet 33 can be made of the same material as that of the pocket sheet 15, but another material may be used. In this case, a stretchable material or a non-stretchable material may be used. When an elastic material is used, the elastic member 19 can be omitted by disposing the elastic material in an extended state.

The length of the auxiliary sheet 33 along the longitudinal direction of the absorber 14 varies depending on the type and size of the absorbent article, but is generally set in the range of 10 mm to 200 mm, and is preferably Is in the range of 30 mm to 150 mm.
If the length of the auxiliary sheet 33 is less than 10 mm, the effect of preventing leakage from the back and abdomen is not exhibited, and conversely, 200 mm
If it becomes larger, the opening 25 is closed and the absorber 14
And the absorption performance of the absorber 14 is impaired.

As described above, by providing the auxiliary sheet 33, it is possible to more reliably prevent the deployable diaper 11 from leaking from the back and abdomen. Further, when the slit 23 becomes larger than the designed size, when the slit 24 is shifted to one side of the back abdomen more than designed, or when the slit 23 tears from the slit 23 to the back abdomen of the pocket sheet 15. Even if a pocket cannot be formed, it is possible to reliably prevent leakage from the back and abdomen.

The auxiliary sheet 33 may be provided over the entire area of the side flap portions 16 and 17. In this embodiment, the auxiliary sheet 33 is used as the pocket sheet 1.
5, but may be interposed between the top sheet 13 and the pocket sheet 15, and may be provided only at one end in the longitudinal direction of the absorber 14. It is. Even when the auxiliary sheet 33 is interposed between the top sheet 13 and the pocket sheet 15, the auxiliary sheet 33 is joined to the pocket sheet 15, and a gap is formed between the top sheet 13, that is, the absorber 14 and the auxiliary sheet 33. It is desirable to be able to form. In the drawing, the auxiliary sheet 33 to be disposed is disposed only partially in the width direction of the absorber, but may be disposed over the entire length.

[0058]

According to the absorbent article of the present invention, the outer side edge of the pocket sheet in the width direction is joined to the top sheet along the longitudinal direction, and the slit is formed at the center of the pocket sheet in the width direction. The central portion in the longitudinal direction of the pocket sheet is folded back and joined to the outside thereof, and the linear distance from the joining portion between the absorber and the one end side in the longitudinal direction of the pocket sheet to the joining portion on the other end side is further measured. Since the length of the absorber from the joining portion with the one end in the longitudinal direction to the joining portion on the other end is set shorter, the absorber is surrounded by pocket sheets, and the edges of the slits of these pocket sheets are The openings are formed apart from each other. As a result, the edge of the slit of the pocket sheet rises from the peripheral edge of the absorber to form a weir, and a pocket structure is formed as a whole, and excrement of the wearer is absorbed from the opening regardless of the posture of the wearer. It is received by the body, and leakage of excrement not only from the crotch but also from the back and abdomen is reliably prevented by the weir described above.

Further, a slit extending in the longitudinal direction is formed at the center in the width direction, and the opening is formed by separating the edges of the slit from each other, so that a plurality of sheets are laminated. Thus, it is not necessary to form a pocket sheet, and it is not necessary to cut and remove the sheet for that purpose, so that the production speed is not reduced and the production cost can be improved.

When the elastic member is arranged along the opening at the edge of the slit of the pocket sheet, the tendency of the edge of the slit of the pocket sheet to rise from the peripheral edge of the absorber is further strengthened, and the weir is increased. Can be reliably formed. Similarly, even when the pocket sheet is formed of an elastic member, the side edge of the width direction inner side edge of the pocket sheet tends to rise from the peripheral edge of the absorber using the contracting force of the elastic member or the elastic member. As a result, the weir can be reliably formed.

Furthermore, in the case where auxiliary sheets are provided to be superimposed on both ends in the longitudinal direction of the pocket sheet, leakage from both ends in the longitudinal direction of the absorber can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment in which an absorbent article according to the present invention is applied to a deployable diaper.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a plan view showing a state before joining the pocket sheets in the embodiment shown in FIG. 1;

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 7 and FIG.

FIG. 7 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 6 and FIG.

FIG. 8 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 6 and FIG.

FIG. 9 is a sectional view similar to FIG. 3, showing a structure of a main part of another embodiment of the absorbent article according to the present invention.

FIG. 10 is a sectional view similar to FIG. 3, showing a structure of a main part of another embodiment of the absorbent article according to the present invention.

FIG. 11 is a perspective view showing the appearance of still another embodiment in which the absorbent article according to the present invention is applied to a deployable diaper.

[Explanation of symbols]

REFERENCE SIGNS LIST 11 unfolded diaper 11C unfolded diaper continuum 12 backsheet 13 topsheet 14 absorber 15 pocket seat 15C unfolded continuum of pocket sheet 16, 17 side flap 18 waist gather 19 waist elastic member 20 leg gather 21 leg elastic 21 Member 22 Fastening tape 23 Slit 24 _R , 24 _L Joining part 24 _RO , 24 _RI , 24 _LO , 24 _LI bonding part 25 Opening part 26 Opening part 27 Base tape 28 Free end part 29 Folding part 30 Elastic member 31 Elastic member fixing Tape 32 Weir 33 Auxiliary sheet D Cutting line L _R , _LL Turned line

Claims (5)

[Claims] 1. A liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber disposed between the topsheet and the backsheet, and disposed along a longitudinal direction of the absorber. And an absorbent article having a pocket sheet whose outer side edge in the width direction is joined to the top sheet, wherein both end portions in the longitudinal direction of the pocket sheet are provided at both end portions in the longitudinal direction of the absorber. A slit is formed at the center in the width direction of the pocket sheet and extends along the longitudinal direction thereof. The center of the pocket sheet in the longitudinal direction is folded outward from the slit and joined to each other. Joints are provided respectively, thereby forming openings that separate the edges of the slits of the pocket sheet from each other. The linear distance from the joint portion with the one end in the hand direction to the joint portion on the other end is equal to the linear distance of the absorber from the joint portion between the absorber and one longitudinal end of the pocket sheet to the joint portion on the other end. An absorbent article characterized by being shorter than the length. 2. A liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber disposed between the topsheet and the backsheet, and disposed along a longitudinal direction of the absorber. And an absorbent article having a pocket sheet whose outer side edge in the width direction is joined to the top sheet, wherein both end portions in the longitudinal direction of the pocket sheet are provided at both end portions in the longitudinal direction of the absorber. A slit is formed at the center in the width direction of the pocket sheet and extends along the longitudinal direction thereof. Joints which are respectively folded back and joined to the top sheet are provided, thereby forming openings which separate the edges of the slits of the pocket sheet from each other. The linear distance from the joint between the absorber and one end in the longitudinal direction of the pocket sheet to the joint on the other end is different from the joint between the absorber and one end in the longitudinal direction of the pocket sheet to the other end. An absorbent article characterized in that it is set to be shorter than the length of the absorber reaching the joint portion of (1). 3. The absorbent article according to claim 1, wherein an elastic member is arranged along an edge of the slit of the pocket sheet along the opening. 4. The pocket sheet according to claim 1, wherein the pocket sheet is formed of an elastic member.
The absorbent article according to any one of the above. 5. The absorbent article according to claim 1, further comprising an auxiliary sheet superposed on both ends in the longitudinal direction of said pocket sheet.