JP2000005229A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article that can be easily manufactured and can prevent the appearance of dermatitis and the like previously by making excrements retained so that they are separated and preventing these leakage. SOLUTION: An unfolding type diaper 11 has a pair of pocket sheets 15R and 15L which are arranged along the longitudinal direction of an absorptive body disposed between a liquid permeable top sheet 13 and a liquid impermeable back sheet while their side rims outside along the direction of its width are attached to the top sheet 13 or the back sheet. One ending side in the longitudinal direction of the pair of pocket sheets 15R and 15L, while the inside rims in the direction of its width are piled up to each other, is attached to at least one ending side in the longitudinal direction of the top sheet 13. The side rims of the pair of pocket sheets 15R and 15L that are inside toward the direction of its width and are extended from the one ending part where the one ending side in the longitudinal direction is attached to another ending part are made apart from each other so as to shape an opening part 24. Inside the opening part 24, a pair of solid gathers 30 are arranged along the longitudinal direction of the pair of pocket sheets 15R and 15L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article capable of holding excrement in a separated state and preventing leakage of the excrement.

[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 cannot absorb the excretion, and may leak from the central part or the back side 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 has a so-called three-dimensional gather rising from the side edge of the absorber, 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 Application Laid-Open No. 3-59 discloses a structure in which a part of a three-dimensional gather is adhered to a side edge of an absorber so that the three-dimensional gather can be reliably raised. I have. The three-dimensional gather of the absorbent article rises from the absorber not only due to the expansion and contraction of the elastic body arranged at its free edge, but also due to the difference in the longitudinal dimension between the three-dimensional gather and the absorber, and the longitudinal direction of the absorbent article Prevents leakage from the center.

On the other hand, Japanese Patent Application Laid-Open No. 4-300543 discloses a second top sheet having a U-shaped opening at the top of an absorbent article in order to prevent leakage from the center and back of the absorbent article. An arrangement is disclosed. This absorbent article has a so-called pocket structure, and the integral second top sheet rising from the absorber serves as a barrier so that the excrement discharged in the first top sheet does not leak out. .

[0007]

[Problems to be Solved by the Invention] Japanese Patent Publication No. Hei 6-93901
The technique disclosed in Japanese Patent Application Laid-Open Publication No. H11-13978 only prevents leakage of the absorbent article from the width direction. Also, depending on the posture of the wearer, it is conceivable that the three-dimensional gathers of the absorbent article are crushed and do not rise from the absorber, and the effect of preventing leakage is insufficient.

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. . Moreover, depending on the posture of the wearer, the flap may be crushed, and excrement may leak over the flap.

[0009] Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 3-59, it is difficult to prevent the excrement from leaking from the back side of the absorbent article.

On the other hand, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-300543, it is necessary to have a lifting means below the second top sheet in order to make the second top sheet rise above the absorber. Further, in order to improve the rising of the second top sheet, it is desirable to dispose the elastic body over the entire periphery of the U-shaped pocket. However, it is desired to arrange this elastic body in a U-shape along the pocket. Then
The production speed of the absorbent article decreases, and the production cost increases. Conversely, when the elastic body is arranged only in the longitudinal direction of the absorbent article, the production is easy, but the second top sheet on the back side is insufficiently raised. In addition, the production speed is reduced due to the cutting and removal of the sheet in the pocket portion of the second top sheet.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to keep excreta separated and to prevent their leakage,
An object of the present invention is to provide an easily absorbable article which can prevent dermatitis and the like from occurring.

[0012]

SUMMARY OF THE INVENTION An absorbent article according to the present invention comprises a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber disposed between the topsheet and the backsheet. An absorbent article comprising a pair of pocket sheets that are arranged along the longitudinal direction of the absorber and whose outer side edges in the width direction are the top sheet or the back sheet. One end in the longitudinal direction of the pair of pocket sheets is joined to at least one end in the longitudinal direction of the top sheet in a state where their widthwise inner side edges are overlapped with each other. An opening is formed in which the widthwise inner side edges of the pair of pocket sheets from the joined portion at one end to the other end are separated from each other, and the longitudinal direction of the pair of pocket sheets is It is characterized in that the pair of standing gathers is disposed inside the opening along.

According to the present invention, a pair of pocket sheets arranged along the longitudinal direction of the absorber are bonded to the top sheet or the back sheet at the widthwise outer side edges thereof, and further, these widthwise inner edges are joined to the backsheet. One end in the longitudinal direction is joined to at least one end in the longitudinal direction of the top sheet in a state where the side edges are overlapped with each other, and the side edges on the width direction inside of these pocket sheets are separated from each other to form the opening. As a result, the absorber is surrounded from three sides by the pocket sheet weir forming the pocket structure.

A pair of three-dimensional gathers is arranged inside the opening, that is, inside the weir, and the presence of the weirs prevents the three-dimensional gathers from falling outside and rises from the top sheet.

Therefore, regardless of the posture of the wearer, the excrement of the wearer is received by the absorber through the opening, and the above-mentioned pocket structure and three-dimensional gathers allow not only the excrement from the crotch but also the excrement from the back. Leakage is also reliably prevented, and the excrement is kept separate.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In an absorbent article according to the present invention, the insides of a pair of pocket sheets are folded back outside in the width direction to form joints joined to each other, and an opening is formed by these joints. You may. In this case, the joining portion is located at the boundary between the joining region and the non-joining region along the longitudinal direction of the top sheet and the pocket sheet, that is, at the inner side in the width direction than the rising portion when the pocket sheet is separated from the top sheet. It may be formed on the pocket sheet, may be formed at the position of the upright portion, or may be formed outside the upright portion in the width direction.

Thus, by providing the joint,
Even if the length of the top sheet and the back sheet in the longitudinal direction is the same as the length of the inside of the pocket sheet in the width direction, the inside of the pocket sheet in the width direction is curved from one end in the longitudinal direction to the other end. As a result, the pocket sheet is pulled by the top sheet and the back sheet, and as a result, the side edge part in the width direction of the pocket sheet rises from the peripheral part of the absorber without fail.

It is also effective to dispose an elastic member in a stretched state along the widthwise inner side edges of the pair of pocket sheets, or to form the pair of pocket sheets with an elastic member. Also in this case, similarly, the tendency of the side edge portion in the width direction of the pocket sheet to rise from the peripheral edge portion of the absorber can be further increased by utilizing the contracting force of the elastic member or the elastic member.

Further, an auxiliary sheet may be provided to be overlapped on one longitudinal end of the pair of pocket sheets.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments 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 12, but the present invention is not limited to such an embodiment. These can be further combined, or applied to technologies in other fields that include similar problems.

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 on both sides in the width direction of the absorber 14, and a side edge on the outer side in the width direction and one end in the longitudinal direction are disposed on the top sheet. 13, a pair of pocket sheets 15R and 15L, a top sheet 13 and a back sheet 12 extending outward from both side edges of the absorber 14 in the width direction.
A pair of side flap portions 16, 17 formed by
A waist elastic member 19 sandwiched between the top sheet 13 and the back sheet 12 extending from one longitudinal end of the absorber 14 to form a waist gather 18 for improving fit around the waist when worn. And the side flap portions 1 on both sides in the width direction of the absorber 14
Top sheet 13 and back sheet 1 forming 6, 17
2 and leg elastic members 21 for forming leg gathers 20 for improving the fit around the legs when worn, and attached to both side edges in the width direction of the side flap portion 16 at one end. , The other side flap portion 17
And a pair of left and right fastening tapes 22 for superimposing and connecting them.

In this case, a pair of pocket sheets 15R,
The widthwise inner side edges of the pair of pocket sheets 15R, 15L are formed by the joints 23R, 23L formed along the abdomen from the center along the width direction near the widthwise outer side edge of the 15L. Pocket seat 1 that is separated from each other on three sides
An opening 24 surrounded by 5R and 15L is formed.

In this embodiment, the joints 23R and 23L are formed in a continuous straight line from the center in the longitudinal direction to the abdomen of the pocket sheet 15, but are arranged in a curved line or an intermittent broken line. The diaper 11 may be provided over the entire length of the deployable diaper 11.

Elastic member 1 around waist in this embodiment
9 is arranged only on one end side in the longitudinal direction of the absorber 14, but may be arranged on the other end side in the longitudinal direction. Further, the leg-surrounding elastic member 21 is provided only at a central portion along the width direction of the unfolded diaper 11 along the longitudinal direction outside both side edges of the absorber 14, and further, between the side flap portions 16 and 17. Is formed with a pair of cutouts 25 for forming an opening around the leg when worn.

Further, the fastening tape 22 can be repeatedly peeled off from the base tape 26 (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, low-melting polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are not limited thereto. It is not necessary to form the top sheet 13 as a single sheet, but a center top sheet 13C superimposed on the absorber 14 (see FIG. 10).
The top sheet 13 may be constituted by a pair of side top sheets 13S (see FIG. 10) forming the side flap portions 16 and 17. In this case, different materials may be used for the center top sheet 13C and the side top sheet 13S, but they may be made of the same material.

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 a 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,
Absorbent fibers such as flocculent pulp and rayon are made into mats and a superabsorbent polymer (hereinafter, referred to as SAP) is uniformly dispersed or arranged in a layered form. Wrapped in a hydrophilic sheet. Absorbent body 14 having floc pulp
In this case, 3 to 60% by weight of a heat-fusible substance may be mixed with the cotton-like pulp, 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. .

In the present embodiment, the pair of pocket sheets 15R and 15L has one end in the longitudinal direction which is the absorbent body 1R.
4 are joined to the top sheet 13 in a state where they are overlapped with each other at a central portion along the longitudinal direction, but may be joined to the back sheet 12. Liquid leakage can be prevented. The side edges of the pocket sheets 15R and 15L on the outer side in the width direction are also joined to the top sheet 13. The overlap width of the pair of pocket sheets 15R and 15L is preferably set to 2 mm or more, and a part of the overlapped portion may be joined to each other.

From the central portion along the width direction of the pocket sheets 15R, 15L to the abdomen, joint portions 23R, 23L are formed along the longitudinal direction, respectively. These joints 23R, 23L are connected to the pocket sheets 15R, 15R.
L is formed by folding the side edge side in the width direction inside of L, that is, the free end 27 side, at the folded portion to the outside in the width direction, and joining a part of the mutually overlapping surfaces linearly along the longitudinal direction. You. These joints 23R, 2
Openings 2 in pocket seats 15R, 15L by 3L
4 is provided, and the longitudinal size of the pocket sheets 15R and 15L is set shorter than the longitudinal size of the absorber 14, so that the absorber 14 is urged in an arc shape. As a result, the pocket sheets 15R and 15L rise from the absorber 14 to form the weir 28.

An elastic member 29 is joined to the folded portions of the pocket sheets 15R and 15L in an extended state, whereby the three-dimensional gathers 3 rising from the top sheet 13 are formed.
0 is formed inside the weir 28. In this case, one end or both ends in the longitudinal direction of the three-dimensional gather 30 located on the side opposite to the waist gather 18 (the ventral side of the deployable diaper 11) may be joined to the top sheet 13. Similarly, one end of the weir 28 in the longitudinal direction is connected to the three-dimensional gather 3.
It may be made to fall down to the 0 side, or fall down to the side flap part 17 side, and may be joined to the top sheet 13.

The elastic member 29 is preferably arranged in a range of 1/5 to 9/10 of the length of the absorber 14 in the longitudinal direction.
9 is the tip of the three-dimensional gather 30, that is, the pocket seat 1
5R, 15L left and right adhesive parts 23R _O , 23R _I , 23
L _O and 23L _I (see FIG. 4) are respectively joined at the same distance from each other.
In other words, it can be arranged close to the joints 23R and 23L,
Alternatively, a plurality of them may be arranged.

In this embodiment, the pocket seat 15R,
An elastic member 31 is joined to the 15L free end 27 in an extended state. As a result, the absorber 14 is urged in an arc shape so that the distance between the one end and the other end in the longitudinal direction of the absorber 14 is shortened, and as a result, the pocket sheets 15R, 15
When the free end 27 of L rises from the absorber 14, it can rise more steeply by the elastic member 31, and the formation of the weir 28 is ensured.

Although it is possible to omit the elastic member 31 described above, when the elastic member 31 is employed as in the present embodiment, the pocket sheet 15 having the opening 24 is formed.
Preferably, it is arranged over the entire area of the free end 27 of R, 15L. In this embodiment, each of the elastic members 3
1 are joined to the free ends 27 of the pocket sheets 15R, 15L, respectively, but it is also possible to join a plurality of elastic members 31.

Thus, the pair of pocket sheets 1
The free ends 27 are separated from one end of each of the 5R and 15L, that is, the center along the width except for the back side, and are further separated from the surface of the top sheet 13 so that the three sides of the pockets 15R and 15L. Opening 24 surrounded by
In addition, a weir 28 bordering the opening 24 is formed.

The opening 24 is not particularly limited as long as it is large enough to excrete excreted on the upper surface of the absorber 14 through the opening 24. However, preferably, the length of the pocket sheets 15R and 15L separated from each other is generally about 3/5 to 9/10 of the dimension along the longitudinal direction of the absorber 14. This distance apart from each other
If the dimension is less than 3/5 of the dimension along the longitudinal direction of the absorber 14, the opening 24 becomes too small, and
If it does not fall within the range of 4 and exceeds 9/10 of the dimension along the longitudinal direction of the absorber 14, it may be insufficient to obtain the effect of preventing leakage from the back side.

As a method of easily realizing the structure of this embodiment, FIG. 4 showing the appearance before forming the joints 23R and 23L and FIG. 5 showing the sectional structure taken along the line VV of FIG.
As shown in the figure, the elastic members 31 are joined in an extended state from the central portion along the width direction of each of the pocket sheets 15R, 15L to the other end side, that is, from the abdomen, and in the width direction in parallel with the elastic members 31. A pair of adhesive parts 23R lined up
_O , 23R _I , 23L _O , and 23L _I are provided at equal distances from the elastic member 31, and these bonded portions 23R _O , 23R _I ,
The openings 24, the weirs 28, and the three-dimensional gathers 30 can be formed at the same time by overlapping and joining the 23L _O and 23L _I to form the joints 23R and 23L described above.

In this case, the elastic member 31 which surrounds the opening 24 in a curved state along the opening 24 serves as a pocket sheet continuum 15R _C , 15 which will be described later when the expandable diaper 11 is manufactured.
L _C (see FIG. 7) can be joined in a straight line along the transport direction, and there is no need to take special consideration for bending along the opening 24.

That is, a pair of pocket seats 15R,
The one end in the longitudinal direction of 15L and the side edge on the outer side in the width direction are joined to the top sheet 13, and the joining portions 23R, 23L are formed on the pair of pocket sheets 15R, 15L, so that the widths of the pocket sheets 15R, 15L are formed. The side edges on the inner side in the direction are arranged so as to be curved outward in the longitudinal direction, so that the pocket sheets 15R and 15L are pulled in the longitudinal direction with respect to the top sheet 13 and the like by an amount corresponding to the formation of the three-dimensional gathers 30. As a result, the absorber 14 is curved in an arc shape with respect to the pocket sheets 15R, 15L, so that the free ends 27 of the pocket sheets 15R, 15L stand up from the absorber 14. Furthermore, by disposing the elastic member 31 in the extended state at the free ends 27 of the pair of pocket sheets 15R and 15L, the linear distance between one end and the other end in the longitudinal direction of the absorber 14 is shortened. As a result of the absorber 14 being urged in an arc shape, the free ends 27 of the pocket sheets 15R, 15L can be steeply raised from the absorber 14.

The height of the weir 28 at the free end 27 of the pocket sheets 15R, 15L rising from the joints 23R, 23L is within the range of 5 mm to 100 mm, preferably 20 mm to 6 mm.
It is preferable to set within the range of 0 mm. The height of the weir 28 varies depending on the body type of the wearer and the type of the absorbent article, but prevents leakage at the crotch part of the wearer, or places the three-dimensional gathers 30 outside (the side opposite to the absorber 14). An appropriate height is required to make it difficult to fall down. If the height of the weir 28 is less than 5 mm, it is difficult to obtain the effect of suppressing the fall of the three-dimensional gather 30 to the outside.
If it is higher than mm, depending on the wearing method and posture of the wearer,
The portion of the weir 28 may be interposed between the absorber 14 and the wearer, and the function of the absorber 14 may not be exhibited.

Similarly, three-dimensional gathers 30 at the crotch part
Height is in the range of 5 mm to 100 mm, preferably 20 mm
It is preferable to set within the range of ６０60 mm. The height of the three-dimensional gathers 30 varies depending on the body type of the wearer and the type of the absorbent article, but is required to prevent leakage at the crotch part of the wearer. If the height of the three-dimensional gathers 30 is less than 5 mm, it is difficult to prevent leakage at the crotch part. Conversely, if the height of the three-dimensional gathers 30 is more than 100 mm, depending on the wearing method and posture of the wearer, the three-dimensional gathers 30 may become
And the wearer may not be able to exhibit the function of the absorber 14.

In the above-described embodiment, the elastic member 29 is joined to the pocket sheets 15R and 15L. However, the folded portions of the pocket sheets 15R and 15L may be widened so as to sandwich the elastic member 29. . Alternatively, the elastic member 29 may be joined to the elastic member fixing tape 32 by using an elastic member fixing tape 32 (see FIG. 6) as described later.

FIG. 6 shows a sectional structure similar to FIG. 5 in another embodiment of the absorbent article according to the present invention.
Elements having the same functions as those of the previous embodiment will be denoted by the same reference numerals, and duplicate description will be omitted. That is, the elastic member 29 is disposed so as to be sandwiched between the elastic member fixing tape 32 and the pocket sheets 15R and 15L. Therefore, by forming the joint portions 23R and 23L, a part of the three-dimensional gather 30 has a double structure with the folded portions of the pocket sheets 15R and 15L and the elastic member fixing tape 32.

In this case, even if the joining of the joining portions 23R and 23L is insufficient for some reason, the elastic member 29
Is previously sandwiched between the pocket sheets 15R and 15L and the elastic member fixing tape 32, the elastic member 29 has insufficient adhesion to the pocket sheets 15R and 15L, and the elastic member 29 Sheet 15
Problems such as peeling from R, 15L can be prevented beforehand. In the illustrated example, two elastic member fixing tapes 32 are used corresponding to the left and right elastic members, and the left and right elastic members are independently joined to these elastic member fixing tapes 32, respectively. The pair of elastic members 29 and 31 may be fixed using the wide elastic member fixing tape.

In this embodiment, the folded portions of the pocket sheets 15R and 15L forming the three-dimensional gathers 30 are joined in close contact with each other, but as shown in FIG.
Is sandwiched between the elastic member fixing tape 32 and the pocket sheet 15, it is not necessary to join the entire folded portion of the pocket sheet 15 in a tight contact state, and a gap is formed in the folded portion. Is also good.

The pocket seat 15 used in the present invention
The R, 15L and the elastic member fixing tape 32 can be formed of a liquid-impermeable film or a laminate of these in addition to a hydrophilic or hydrophobic nonwoven fabric, a woven fabric, a porous plastic film, or the like. . 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 non-woven fabric and the woven fabric include fibers such as polypropylene, polyethylene, polyester, and nylon, or polyester, polypropylene, polyethylene, and nylon.
It can be composed of a composite fiber or the like in which the types are combined. In particular, low-melting 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 top sheet 13 (including the center top sheet 13C and / or the side top sheet 13S) is made of a wide material,
4 are folded back on the absorber 14, and the folded back portions are used as pocket sheets 15R, 15L.
May be formed. Also in this case, by applying a water-repellent treatment to the folded portion, the leakage preventing effect can be further enhanced.

The waist elastic member 1 described above
9. Leg elastic members 21, elastic members 29, 31 are made of natural rubber, synthetic rubber, urethane, etc., formed into a thread, string, or tape, and are made of starch, CMC.
It is fixed by a water-soluble adhesive such as (carboxymethylcellulose), but may be fixed by heat welding or ultrasonic welding.

In the present embodiment, a pair of left and right three-dimensional gathers 30 is formed inside the weir 28, but a plurality of pairs of these gathers may be formed. In this case, the three-dimensional gathers 30 may be formed outside the free end 27 of the pocket sheet 15, that is, outside the weir 28 in the width direction.

The joints 23R, 23L and the three-dimensional gathers 30 described above can be efficiently manufactured during the manufacture of the deployable diaper 11, and an example of a manufacturing procedure of such a deployable diaper 11 is shown in FIG. To FIG. That is, for the continuum 11C deployment type diaper in the state shown in FIG. 4 which is cut along the cutting line D indicated by the two-dot chain line, a pair of elastic pocket seat 15R _C, the free end 27 of 15L _C The member 31 is joined in an extended state. Further, continuum 15R _C pocket sheet, the widthwise central portion of the left and right side edges and a free end portion 27 of 15L _C, the elastic member 29 is joined in a stretched state. Further, the continuous portions 15R _C and 15L _C of the pocket sheet are provided on both sides of these elastic members 29 at the positions equidistant from the elastic members 29 at the bonding portions 23.
R _O , 23L _O , 23R _I , and 23L _I are set, and an adhesive is applied to only one of these joints (in the illustrated example, the adhesive parts 23R _O and 23L _{O on the} outer side in the width direction) (FIG. 7). see), adhesion portion 23R _O continuum 15R _C pocket sheet, in FIG set equidistant from 23R _I, folding lines L _R, i.e. the elastic member 29 on the continuum 15R _C pocket sheet shown by a chain line One side (the right side in the figure) of the continuous body of the deployable diaper is folded along the valley fold. Thereby, the continuum 15R _{C of the} pocket sheet is obtained.
Are automatically formed (see FIG. 8).

Similarly, the continuous body of the unfolded diaper 11C
The other side (the left side in the figure) is a continuum of pocket sheet 1
5L _C bond portion 23L _O of, in FIG. 8 set equidistant from 23L _I, folded at folding lines L _L indicated by a dashed line, i.e. along the elastic member 29 on the continuum 15L _C pocket sheet valley fold automatically form the joint 23L and the three-dimensional gathers 30 of the continuum 15L _C pocket sheet, and a continuous body 11C deployment type diaper of 3 fold state as shown in FIG. 9, cut to along the cutting line D After obtaining the unfolded diaper 11, the diaper is further folded in two or three in the longitudinal direction, packed, and shipped.

At this time, a configuration may be adopted in which the deployable diapers 11 adjacent to each other along the longitudinal direction of the deployable diaper continuous body 11C are arranged in the same direction. Expandable diapers 11 adjacent along
It is preferable that the back side and the back side, and the abdomen side and the abdomen side are continuous with each other in such a manner that the directions are alternately arranged in opposite directions. As in the present embodiment, when the adjacent deployable diapers 11 are alternately arranged in the longitudinal direction in the opposite direction, the edge portions of the bonding portions 23R and 23L of the adjacent deployable diapers 11 are connected to the respective deployable diapers 11. It is not necessary to make it fit exactly with the cut portion D of this example, and even if the positions of the joint portions 23R and 23L are slightly shifted at the time of manufacturing, no defective product is generated, so that high-speed manufacturing is possible.

In this manner, the pocket sheet 15R,
When 15L is formed, even if the elastic members 31 of the pocket sheets 15R and 15L are arranged in a straight line along the flow direction of the production line, the opening 24 formed is U-shaped, and substantially the entire opening 24 is formed. It is possible to manufacture the deployable diaper 11 which is three-dimensionally curved and which can be reliably manufactured from the widthwise side edge of the absorber 14 while the weir 28 and the three-dimensional gather 30 are easily manufactured.

In the above-described embodiment, the joints 23R, 23 between the top sheet 13 and the pocket sheets 15R, 15L.
The three-dimensional gathers 30 are raised from L, but the rising portions of the three-dimensional gathers 30 are connected to the elastic members 21 around the legs, the top sheet 13 and the pocket sheet 15.
It is also possible to form them inside the joints 23R, 23L with R, 15L.

FIG. 10 shows a 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 of the previous embodiment will be denoted by the same reference numerals, and duplicate description will be omitted. In other words, a pair of side top sheets 13 is provided on the outer side edges of the center top sheet 13C covering the absorber 14.
Side edges on the inner side in the width direction of S are overlapped and integrally joined to form a top sheet. Leg gather 2
The leg surrounding elastic member 21 for forming 0 is joined and fixed between the back sheet 12 and the side top sheet 13S. The outer edges of the pocket sheets 15R and 15L in the width direction are joined to the side top sheet 13S, and in this embodiment, joints 23R and 23L (only one joint 23R is shown in FIG. 10) further outside. Has formed.

As described above, by separating the positions of the joints 23R and 23L from the absorber 14, the opening 24 can be further expanded, and this can be used as a reservoir for excrement.

In the above-described embodiment, the pocket sheet 15
R, 15L joints 23R, 23L to top sheet 13
Alternatively, although formed on the side top sheet 13S, these joint portions 23R and 23L can be formed separately from the top sheet 13 or the side top sheet 13S.

FIG. 11 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 of the top sheet 13 is set to be short, the side flaps 16 and 17 are formed by the widthwise outer portions of the pocket sheets 15R and 15L and the back sheet 12, and the leg elastic members 21 are held between them. ing. The base end of the three-dimensional gather 30, that is, the pocket seats 15R, 15
The joints 23R, 23L of L (only one joint is shown in FIG. 11) are located on the inner side in the width direction of the pocket sheets 15R, 15L with respect to the joint area between the top sheet 13 and the pocket sheets 15R, 15L. The three-dimensional gathers 30 and a part of the weir 28 are formed by being shifted, and the pockets 15R and 15L between the three-dimensional gathers 30 and the top sheet 13 can be used as a reservoir. .

The structures of the three embodiments shown in FIGS. 3, 10 and 11 described above are arbitrarily selected by simply shifting the formation positions of the joints 23R and 23L along the width direction of the pocket sheets 15R and 15L. 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 preventing leakage from the back side of the deployable diaper 11, it is also effective to overlap the auxiliary sheet on one end in the longitudinal direction of the pocket sheets 15R and 15L. FIG. 12 shows an appearance of another embodiment according to the present invention. Elements having the same functions as those of the previous embodiment are denoted by the same reference numerals, and the duplicate description will be omitted.

That is, the pocket sheets 15R, 15L
The auxiliary sheet 33 is superposed on one end in the longitudinal direction of the first sheet and is integrally joined thereto. Thus, by providing the auxiliary sheet 33, it is possible to more reliably prevent leakage from the back side of the deployable diaper 11.

The auxiliary sheet 33 is a pocket sheet 15
The same material as R and 15L can be used, 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 side is not exhibited, and conversely, 200 mm
If it becomes larger, the opening 24 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, leakage from the back side of the deployable diaper 11 can be more reliably prevented. Furthermore, pocket seat 1
Even when the overlapping portion on the back side of 5R, 15L becomes insufficient, it is possible to reliably prevent leakage from the back side.

The auxiliary sheet 33 may be provided over the entire area of the side flap portion 16. In the present embodiment, the auxiliary sheet 33 is used as the pocket sheet 15R, 1
Although it is arranged to overlap on 5L, it may be interposed between the top sheet 13 and the pocket sheets 15R, 15L. Top sheet 13 and pocket sheet 15R,
Even when the auxiliary sheet 33 is interposed between the auxiliary sheet 33 and the auxiliary sheet 33, the auxiliary sheet 33 is joined to the pocket sheets 15R and 15L so that a gap can be formed between the top sheet 13, that is, the absorber 14 and the auxiliary sheet 33. It is desirable to do. In the present embodiment, although the auxiliary sheet 33 is disposed only partially in the width direction of the absorber 14, it may be disposed over the entire width.

[0070]

According to the absorbent article of the present invention, at least one longitudinal end of the pair of pocket sheets is overlapped with at least one longitudinal end of the top sheet in a state where side edges on the inner side in the width direction are overlapped with each other. The opening and the weir are formed by joining and separating the widthwise inner side edges of the pair of pocket sheets from the joining portion at one longitudinal end to the other end of the pair of pocket sheets from each other. Since the three-dimensional gathers are formed inside the opening, regardless of the posture of the wearer, the excrement of the wearer is received by the absorber from the opening, and not only the crotch part but also the back by the weir and the three-dimensional gathers. Excretion leakage from the side is also reliably prevented,
These excrements can be kept in a separated state.
As a result, it is possible to prevent dermatitis and the like from occurring. In addition, when a joint is formed by folding the pocket sheet outward in the width direction from the central portion along the width direction of the pocket sheet to the abdomen, the inside of the pocket sheet in the width direction from the peripheral portion of the absorber is provided. The rising tendency of the side edge portion of the ridge is further strengthened, and the weir can be reliably formed.

Similarly, an elastic member may be arranged in an extended state along the widthwise inner side edges of the pair of pocket sheets,
Alternatively, even when the pair of pocket sheets themselves are formed of a stretchable member, the side edges on the widthwise inside of the pocket sheet rise from the peripheral edge of the absorber using the contracting force of the elastic member or the stretchable member. As a result, the weir can be reliably formed.

Further, when an auxiliary sheet to be superimposed on one end in the longitudinal direction of a pair of pocket sheets is provided,
Leakage from the back side 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 sectional view similar to FIG. 5, showing a structure of a main part of another embodiment of the absorbent article according to the present invention.

FIG. 7 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 8 and FIG.

FIG. 8 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 7 and FIG.

FIG. 9 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 7 and FIG.

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

[Explanation of symbols]

11 deployable diaper 11C expansion-type diaper of the continuous body 12 back sheet 13 top sheet 14 absorbent body 15R, 15L pocket sheet 15R _C, 15L _C pocket sheet continuous member 16, 17 side-flap portions 18 waist gather 19 waist elastic member 20 Leg gather 21 Leg elastic member 22 Fastening tape 23R, 23L Joint 23R _O , 23R _I , 23L _O , 23L _I bonding part 24 Opening 25 Cutout 26 Base tape 27 Free end 28 Weir 29 Elastic member 30 Solid gather 31 Elastic member 32 Elastic member fixing tape 33 Auxiliary sheet D Cutting line L _R , _LL Return line

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Izumi Tashiro 1-10-6 Shinonome, Koto-ku, Tokyo Oji Paper Co., Ltd. Shinonome Research Center F-term (reference) 3B029 BA04 BA12 BA18 BB03 BB05 BB07 BC06 BD08 BD12 BD13 BD14 BD17 4C098 AA09 CC10 CC12 CC16 CE07 DD25 DD26 DD28 DD30

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 the widthwise outer side edge is the top sheet, or an absorbent article comprising a pair of pocket sheets joined to the back sheet, wherein one end in the longitudinal direction of the pair of pocket sheets is Are joined to at least one longitudinal end of the top sheet in a state where these side edges in the width direction are overlapped with each other, and reach from the joined portion of one longitudinal end of the pair of pocket sheets to the other end. An opening is formed in which the widthwise inner side edges of the pair of pocket sheets are separated from each other, and a pair of three-dimensional gears are provided inside the opening along the longitudinal direction of the pair of pocket sheets. An absorbent article, wherein a hazard is arranged. 2. A joint portion in which the inside of the pair of pocket sheets in the width direction is folded back to the outside thereof and joined to each other is provided, and the opening is formed by these joint portions. The absorbent article according to claim 1, wherein 3. The absorbent article according to claim 1, wherein an elastic member is arranged along a side edge on the inner side in the width direction of the pair of pocket sheets. 4. The absorbent article according to claim 1, wherein each of the pair of pocket sheets is formed of an elastic member. 5. The absorbent article according to claim 1, further comprising an auxiliary sheet superposed on one longitudinal end of said pair of pocket sheets.