JP3771466B2 - Disposable wearing items - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable wearing article that absorbs and holds excrement.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 11-128268 discloses a liquid-absorbing surface sheet positioned between the skin-contacting side, the liquid-impervious back sheet positioned on the non-skin-contacting side, and the front and back sheets. The front and rear waist area includes a front waist area and a rear waist area, and a crotch area positioned between the waist areas, and a liquid-impervious leakproof sheet extending in the waist direction. An open-type disposable diaper attached to a bag is disclosed.
[0003]
The leak-proof sheet is fixed to the vicinity of the edge of the front and rear waist area and extends in the direction of the waist, the fixed side of the front and rear waist area is fixed to the vicinity of both edges and extends in the vertical direction, and the fixed end. And a free region extending in the waist circumference direction at a position biased toward the crotch region. In the vicinity of the inner edge of the free region, a stretchable elastic member extending in the circumferential direction is attached in an extended state. In this diaper, the elastic member shrinks inward in the waist direction, and the vicinity of the inner edge of the free region is separated from the outer surface of the surface sheet, so that the front and back are located between the surface sheet and the free region of the leak-proof sheet. A pocket is formed that opens from the waist area to the crotch area. Since this diaper can accommodate excrement in the pocket, it is possible to prevent the excrement from leaking from the edge of the front and rear waist area. There is a description that this diaper can be used not only for the open type but also for the pants type.
[0004]
[Problems to be solved by the invention]
As described above, the elastic member attached to the leak-proof sheet separates the free end of the leak-proof sheet from the top sheet and forms a pocket between the top sheet and the free end of the leak-proof sheet. It is not intended to tighten around the wearer's torso. The diaper disclosed in the above publication does not have a function of tightening the circumference of the wearer on the leak-proof sheet, and cannot prevent the diaper from falling down using the leak-proof sheet.
[0005]
The subject of this invention is providing the disposable wearing article which can prevent the leakage of the excrement from the edge of a trunk periphery area, and the fall | deviating fall using the leak-proof sheet extended to the trunk periphery direction.
[0006]
[Means for Solving the Problems]
The premise of the present invention to solve the above problems is between a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and the front and back sheets. A front waist region and a rear waist region that are opposed to each other, and a crotch region positioned between these waist regions, the top sheet in the front and back waist region A substantially liquid-impervious leak-proof sheet that extends in the circumferential direction on the outer surface is fixed in the vicinity of the edge of the waist area and extends in the waist direction, and both side edges of the waist area It is a disposable wearing article having both fixed side portions fixed in the vicinity and extending in the vertical direction, and a free region extending from the fixed end portion toward the crotch region.
[0007]
As a feature of the present invention based on the premise, the leak-proof sheet is formed by a pair of joint portions extending in the longitudinal direction in the vicinity of both side edges of the core located inward from the fixed side portions in the waist direction. And the free area of the leak-proof sheet is divided into a first free area located between the fixed side parts and the joint part, and a second free area located between the joint parts, Each of the first and second free regions forms a pocket, and a first elastic elastic member extending in the circumferential direction is attached in an extended state along the inner edge of the first and second free regions. A plurality of second elastic elastic members extending in the longitudinal direction with a given distance between the fixed end portion and the first elastic member extending in the longitudinal direction extend into the first free region. It is attached in the state.
[0008]
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The details of the disposable wearing article according to the present invention will be described with reference to the accompanying drawings, taking a pants-type disposable diaper as an example.
[0010]
1 and 2 are a partially broken perspective view of a disposable diaper 1A and a partially broken perspective view of the diaper 1A shown in a state before being formed into a pants mold. 1 and 2, the waist direction is indicated by an arrow X, the vertical direction is indicated by an arrow Y1, and the leg periphery direction is indicated by an arrow Y2. The inner surface of the top sheet 2 and the back sheet 3 refers to the surface facing the core 4, and the outer surface of the sheets 2 and 3 refers to the surface not facing the core 4.
[0011]
The diaper 1A includes a liquid-permeable surface sheet 2 located on the skin contact side, a liquid-impermeable back sheet 3 located on the skin non-contact side, and a liquid-absorbent core interposed between the sheets 2 and 3 4. The diaper 1 </ b> A has a front waistline region 5 and a back waistline region 7 that face each other, and a crotch region 6 that is positioned between the front and back waistline regions 5, 7. The diaper 1A includes a waist circumference edge 8 (end edge) extending in the waist circumference direction through the front and back waist areas 5, 7 and a waist side edge 9 (both side edges) extending in the longitudinal direction through the front and waist areas 5 and 7. The leg circumference side edge 10 extends in the crotch region 6 in the leg circumference direction.
[0012]
In the diaper 1 </ b> A, the vicinity of the waistline side edge 9 overlaps in a palm-like manner, and the vicinity of the waistline side edge 9 is fixed via a number of heat-sealing wires 11 that are intermittently arranged in the vertical direction. The diaper 1 </ b> A has a waist opening 12 and a pair of leg openings 13 below the waist opening 12. As shown in FIG. 2, the diaper 1 </ b> A has a leg periphery side edge 10 that forms an arc inwardly in the waist direction, and the planar shape thereof has a substantially hourglass shape.
[0013]
The core 4 extends from the crotch region 6 toward the front and rear waist regions 5 and 7, is located in the front and rear waist regions 5 and 7, and has both end edges 4 a parallel to the waist edge 8, and the waist side edge 9 and It has both side edges 4b parallel to the leg periphery side edge 10. The core 4 is bonded to at least one inner surface of the top sheet 2 and the back sheet 3.
[0014]
A substantially liquid-impervious leak-proof sheet 14 is attached to the front and rear waist regions 5 and 7 and extends from the outer surface of the top sheet 2 to the waist direction. In the vicinity of the leg periphery side edge 10, a substantially liquid-impervious leak-proof cuff 15 extending on the outer surface of the top sheet 2 in the leg periphery direction is attached.
[0015]
In the vicinity of the waist edge 8, a plurality of waist elastic members 16 extending in the waist direction are attached in an extended state. In the vicinity of the leg periphery side edge 10, a plurality of leg periphery elastic members 17 extending in the leg periphery direction are attached in an extended state.
[0016]
The leak-proof sheet 14 is fixed to the front and rear waist regions 5 and 7 by a fixed end portion 14a, fixed side portions 14b, and a pair of joint portions 18. The leak-proof sheet 14 has a free region 19 that extends in a direction around the trunk from a position biased toward the crotch region 6 from the fixed end 14a. The fixed end portion 14a extends in the vicinity of the waist edge 8 in the periphery direction. The fixed side portions 14b extend in the vertical direction in the vicinity of the waistline side edge 9. The joint portion 18 extends in the vertical direction from the fixed side portions 14b in the vicinity of the outer sides of the side edges 4b of the core 4 located inward in the waist circumference direction. The free region 19 is divided into a first free region 19 a located between the fixed side portions 14 b and the joint 18 and a second free region 19 b located between the joint 18.
[0017]
In the vicinity of the inner edge 20 located on the crotch region 6 side of the first and second regions 19a and 19b, a single stretchable elastic member 21 (first stretchable elastic member) extending in the waistline direction is in an extended state. It is attached with. The elastic member 21 may reach the waist side edge 9.
[0018]
A plurality of stretchable elastic members 22 (second stretchable elastic members) extending in the circumferential direction are attached to the first region 19a in an extended state. The elastic members 22 are arranged between the fixed end portion 14a and the elastic member 21 with a given distance in the vertical direction. The elastic member 22 may reach the waistline side edge 9 and the joint portion 18.
[0019]
The leak-proof cuff 15 is fixed to the outer sides of both side edges 4b of the core 4 and extends in the direction around the leg, a free edge 15b extending in the direction around the leg in parallel with the fixed edge 15a, and the waistline It has fixed both end portions 15c fixed to the front and rear waist regions 5, 7 in a state of falling inward in the direction. The fixed both end portions 15 c are interposed between the top sheet 2 and the leak-proof sheet 14. In the leak-proof cuff 15, a side portion 15d extends laterally outward from the fixed edge portion 15a. A stretchable elastic member 23 extending in the leg-circumferential direction is attached to the free edge 15b in an extended state. The elastic member 23 is covered by a part of the free edge 15b.
[0020]
In order to form the pants-type diaper 1A from the state of FIG. 2, the diaper 1A is bent at the center line L so that the topsheet 2 is on the inside, and the waist circumference side edges 9 of the front and rear waist areas 5 and 7 are used. The vicinity is overlapped in a palm shape, and the vicinity of the waist side edge 9 is fixed to connect the front and rear waist areas 5 and 7.
[0021]
In the diaper 1 </ b> A, the elastic member 21 contracts inward in the waist direction, and the vicinity of the inner edge 20 of the second free region 19 b is separated from the outer surface of the topsheet 2. Between the top sheet 2 and the second free region 19b of the leak-proof sheet 14, a pocket P that opens from the front and rear waist regions 5, 7 toward the crotch region 6 is defined. In the diaper 1 </ b> A, even if the excrement diffuses on the top sheet 2 and reaches the trunk periphery edge 8, the excrement is accommodated in the pocket P, so that leakage of the excrement from the trunk periphery edge 8 is prevented. be able to.
[0022]
In the diaper 1 </ b> A, when the diaper 1 </ b> A is worn, the circumference of the wearer's torso can be tightened using the elongation stress of the plurality of elastic members 22 attached to the first free region 19 a, and the waist elastic member 16 is used. Together with this, it is possible to prevent the diaper 1A from slipping down. In the diaper 1A, the first free region 19b of the leak-proof sheet 14 can be used for fastening around the wearer's torso.
[0023]
In the diaper 1 </ b> A, when the crotch region 6 curves in the leg-circumferential direction with the top sheet 2 inside, the elastic member 23 contracts inward in the leg-circumference direction, and the free edge 15 b of the leak-proof cuff 15 Standing up from the outside. In the diaper 1A, since the free edge 15b forms a barrier against excrement, the excretion of the excrement from the leg periphery side edge 10 can be prevented.
[0024]
3 and 4 are a sectional view taken along line AA in FIG. 2 and a sectional view taken along line BB in FIG. 2, and FIG. 5 is an end view taken along line CC in FIG. In the vicinity of the waist edge 8, the end 2 a of the top sheet 2 and the end 3 a of the back sheet 3 extend outward in the vertical direction from both end edges 4 a of the core 4, and the ends 2 a and 3 a of these sheets 2 and 3. They are fixed in a state where they overlap each other.
[0025]
In the vicinity of the waist circumference side edge 9 and the leg circumference side edge 10, the side portion 2 b of the top sheet 2 extends outward from the side edges 4 b of the core 4 in the waist circumference direction, and further from the side portion 2 b of the top sheet 2 The side part 3b of the back sheet 3 and the side part 15d of the leak-proof cuff 15 extend outward in the direction. In the vicinity of the waist circumference side edge 9 and the leg circumference side edge 10, the side portions 2 b and 3 b of the top sheet 2 and the back sheet 3 are fixed to each other so as to overlap each other, and the back sheet 3 and the leak-proof cuff 15 The side portions 3b and 15d are fixed so as to overlap each other.
[0026]
The fixed edge portion 15 a of the leak-proof cuff 15 is fixed to the outer surface of the side portion 2 b of the topsheet 2. The fixed both end portions 15 c of the leak-proof cuff 15 are fixed to the outer surface of the end portion 2 a of the topsheet 2. The waist elastic member 16 is interposed between the end 2a and the end 3a, and is fixed to the ends 2a and 3a. The leg-around elastic member 17 is interposed between the side portion 3b and the side portion 15d, and is fixed to the side portions 3b and 15d.
[0027]
The leak-proof sheet 14 is a double one that is folded at the inner edge 20 and overlaps each other. The fixed end portion 14 a of the leak-proof sheet 14 is fixed to the outer surface of the end portion 2 a of the topsheet 2 and the fixed both end portions 15 c and the side portions 15 d of the leak-proof cuff 15. The fixed both side portions 14b of the leak-proof sheet 14 are fixed to the side portions 15d of the leak-proof cuff 15 located in the front and rear waist regions 5,7. In the joint portion 18, the leak-proof sheet 14 is fixed to the side portion 15 d of the leak-proof cuff 15. The elastic members 21 and 22 are interposed between the leak-proof sheets 14 and fixed thereto.
[0028]
6 and 7 are a partially broken perspective view of a diaper 1B similar to that of FIG. 2 showing another embodiment, and an end view taken along the line DD of FIG. The diaper 1B is different from that shown in FIG. 1 in that the first free region 19a of the leak-proof sheet 14 is fixed to the front and rear waist regions 5,7. The first free region 19 a is fixed to the side portion 15 d of the leak-proof cuff 15 located in the front and rear waist regions 5 and 7.
[0029]
In the diaper 1B, the first free region 19a and the front and rear waist regions 5 and 7 are integrated to tighten the wearer's waist without the first free region 19a being separated from the front and back waist regions 5 and 7. , Diaper 1B can be prevented from slipping down. In the diaper 1 </ b> B, as compared with the case where the first free region 19 a is separated from the front and rear waist regions 5 and 7, the elongation stress of the elastic member 22 can be reliably applied to the front and back waist regions 5 and 7.
[0030]
In the diaper 1 </ b> B, a pocket P that opens from the front and rear waist regions 5, 7 toward the crotch region 6 is defined between the top sheet 2 and the second free region 19 b of the leak-proof sheet 14. Therefore, it is possible to prevent leakage of excrement from the waist edge 8.
[0031]
For fixing the elastic members 16, 17, 21, 22 to the front and back sheets 2, 3, the leak-proof sheet 14, and the cuff 15, it is preferable to use a hot melt adhesive. For fixing the sheets 2, 3, 14 or cuff 15 to the elastic members 16, 17, 21, 22 with a hot melt adhesive, a pattern in which the adhesive is applied in a spiral or spray form can be selected as appropriate. . However, in order to securely fix the elastic members 16, 17, 21, and 22 to the sheets 2, 3, 14 and the cuff 15, the adhesive coating area ratio with respect to the total surface area of the elastic members 16, 17, 21, and 22 is It is preferable to be in the range of 20 to 80%. If the adhesive coating area ratio is less than 20%, the elastic members 16, 17, 21, and 22 may be detached from the sheets 2, 3, 14, and the cuff 15. When the application area ratio of the adhesive exceeds 80%, the shrinkage of the elastic members 16, 17, 21, and 22 is hindered by the adhesive.
[0032]
For the topsheet 2, a hydrophilic or hydrophobic fiber nonwoven fabric or a plastic film having a large number of fine openings can be used. For the back sheet 3, the leak-proof sheet 14, and the leak-proof cuff 15, a hydrophobic fiber nonwoven fabric, a breathable liquid-impervious plastic film, a composite nonwoven fabric in which a hydrophobic fiber nonwoven fabric is laminated, a hydrophobic fiber nonwoven fabric and a breathable liquid-impervious liquid Any of the composite sheets on which the plastic film is laminated can be used.
[0033]
A composite nonwoven fabric in which a back surface sheet 3, a leakage prevention sheet 14, and a leakage prevention cuff 15 are sandwiched between fiber nonwoven fabrics by a melt-blown method having high water resistance and fiber nonwoven fabrics by a spunbond method having high strength and high flexibility. Can also be used.
[0034]
As a nonwoven fabric, what was manufactured by each manufacturing method of a spunlace, a needle punch, a melt blown, a thermal bond, a spun pond, a chemical bond, and an air through can be used. As the constituent fibers of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polypropylene or polyester can be used.
[0035]
The core 4 is a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and is compressed to a required thickness. The core 4 is preferably covered and bonded to a tissue paper as a whole in order to prevent it from being deformed or from falling off polymer particles. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.
[0036]
For fixing the front and back sheets 2 and 3, joining the core 4, and fixing the leak-proof sheet 14 and the leak-proof cuff 15, adhesion by a hot melt adhesive or welding means by heat such as heat seal or sonic seal is used. Can be used.
[0037]
In these diapers 1 </ b> A and 1 </ b> B, the leak-proof sheet 14 only needs to be attached to at least one of the front and rear waist areas 5 and 7. The present invention can be applied to an open-type disposable diaper in addition to the pants-type disposable diapers 1A and 1B.
[0038]
【The invention's effect】
According to the disposable wearing article according to the present invention, the first elastic elastic member extending to the first and second free regions contracts inwardly in the waist direction, and the vicinity of the inner edge of the second free region is the surface sheet. By separating from the outer surface, a pocket that opens from the waistline region toward the crotch region is defined between the top sheet and the second free region of the leak-proof sheet. In this diaper, since the excrement is accommodated in the pocket, it is possible to prevent the excrement from leaking from the waist edge. In this diaper, when the diaper is worn, the circumference of the wearer's torso can be tightened using the elongation stress of the plurality of second elastic elastic members attached to the first free region. Can be prevented. In this diaper, the first free region of the leak-proof sheet can be used for tightening around the wearer's torso.
[0039]
In the diaper in which the first free region of the leak-proof sheet is fixed to the waistline region, the elongation stress of the second stretchable elastic member can surely act on the waistline region, and the first free region, the waistline region, By tightening around the torso of the wearer, the diaper can be prevented from slipping down.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a disposable diaper.
FIG. 2 is a partially broken perspective view of a diaper shown in a state where it is unfolded back and forth.
3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is an end view taken along the line CC in FIG. 2;
6 is a partially cutaway perspective view of a diaper similar to that of FIG. 2 showing another embodiment.
7 is an end view taken along the line DD in FIG. 6. FIG.
[Explanation of symbols]
1A, 1B Pants-type disposable diapers (disposable wearing articles)
2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Liquid-absorbent core 4b Both side edges 5 Front waist area 6 Inseam area 7 Rear waist area 8 Body edge (edge)
9 Body side edge (both sides)
14 Leakproof sheet 14a Fixed end portion 14b Fixed both side portions 18 Joint portion 19 Free region 19a First free region 19b Second free region 20 Inner end edge 21 Stretchable elastic member (first stretchable elastic member)
22 Stretchable elastic member (second stretchable elastic member)

Claims (1)

Consists of a liquid-permeable top sheet located on the skin contact side, a liquid-impervious back sheet located on the skin non-contact side, and a liquid-absorbent core interposed between the front and back sheets. A front waistline region and a back waistline region, and a crotch region positioned between the waistline regions, and a substantially impermeable liquid extending in the waistline direction on an outer surface of the topsheet in the front and back waistline regions A leak-proof sheet fixed to the vicinity of the edge of the waist area and extending in the waist direction, and fixed both sides of the waist area that are fixed in the vicinity of both edges and extending in the vertical direction. In the disposable wearing article having a free region extending from the fixed end portion to the crotch region side,
The leak-proof sheet is fixed to the waist area by a pair of joints extending in the longitudinal direction in the vicinity of both side edges of the core located inward of the waist direction from the fixed both side parts. A region is divided into a first free region located between the fixed side portions and the joint, and a second free region located between the joint, and the first and second free regions are respectively Forming a pocket,
A first stretchable elastic member extending in the circumferential direction of the trunk is attached in an extended state along inner end edges of the first and second free regions, and the gap between the fixed end and the first elastic member is The wearing article, wherein a plurality of second elastic elastic members extending in the longitudinal direction with a given distance apart in the longitudinal direction are attached to the first free region in an extended state.

Images