JP2000126227A - Throw-away diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throw-away diaper which is so formed that the pockets formed in the front and rear girth regions of a diaper body may be easily opened without hindering the absorption of excrement to cores. SOLUTION: This throw-away diaper is formed by forming the first pocket P1 where a top sheet 2 and a fluid resistance sheet 5 open toward a crotch area 21 in at least either of the front and rear girth regions 20 and 22 and housing and holding an elastic foamed member 10 folded via a folding axial portion 10e for bisecting this member in a transverse direction into the first pocket P1 in such a manner that the folding axial portion 10e exists in the upper part of the cores 4 toward the side of the end edge of the girth areas. The first portion 10a of the foamed member 10 in contact with the front surface of the top sheet 2 and the second portion 10 of the foamed member 10 in contact with the rear surface of the fluid resistant sheet 5 form the second pocket P2 opening toward the crotch area 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a disposable diaper.

[0002]

2. Description of the Related Art A body fluid absorbent article disclosed in Japanese Patent Application Laid-Open No. HEI 8-117274 covers an article body having a liquid-absorbent core interposed between a top sheet and a back sheet, and covers the upper surfaces of both front and rear ends of the body. The peripheral edge of the liquid-resistant sheet is joined at both front and rear ends of the main body to form pockets that open toward the opposite ends of the front and rear ends. The topsheet is exposed at the center located between the front and rear ends of the main body.

[0003]

The pocket of the above-mentioned known article is crushed when the abdomen and the back of the wearer are pressed against each other when worn. It is difficult for the crushed pocket to reopen even if the pressing force is released, so that the function as a pocket for inflow and retention of excrement is reduced. It is also conceivable to use a stretchable sheet as the liquid-resistant sheet, join the liquid-resistant sheet in a stretched state in the width direction of the main body, and open the pocket by using the contraction force. If the contraction force of the core is superior to the rigidity of the core, wrinkles are formed in the core due to the contraction force, and a gap is generated between the core and the topsheet, thereby preventing excretion from being absorbed.

[0004] It is an object of the present invention to provide a disposable diaper in which pockets formed in the front and rear waist regions of the main body can be easily opened when worn, without obstructing absorption of excrement into the core.

[0005]

In order to solve the above-mentioned problems, the present invention is based on the premise that a liquid-permeable top sheet, a liquid-impermeable back sheet, and a sheet interposed between these two sheets. A front waist region, a rear waist region, and a crotch region located between the front and rear waist regions in the longitudinal direction intersecting the width direction, and the front and rear waist regions. In at least one of the regions, a liquid-resistant sheet covers the top sheet and is joined to an edge portion and both side edges of the waist region, and the top sheet and the liquid-resistant sheet, A disposable diaper having a first pocket formed at an upper portion of the core extending from the inseam area to the waist area and opening toward the inseam area.

[0006] On this assumption, the present invention is characterized in that an elastic foam member bent through the bending shaft portion bisected in the width direction is provided inside the first pocket. Is positioned at the upper part of the core toward the side of the edge of the waist region, and the foam member is disposed between the upper surface of the top sheet abutting inside the first pocket and the liquid resistance. A first portion of the foam member that is joined to at least one of a lower surface of the sheet and abuts on an upper surface of the top sheet and the first portion of the foam member that is located above the first portion and abuts on a lower surface of the liquid-resistant sheet; The second part of the foamed member forms a second pocket that opens in the direction of the crotch region.

As a mode of the present invention, the diaper is formed with a pair of side flaps extending outward in the width direction from both side edges of the core and having a first elastically stretchable member attached in the longitudinal direction. A barrier cuff, which is attached between the first elastic member and a side edge of the core in the longitudinal direction and can be raised above the top sheet by a contraction force of the second elastic elastic member, is provided on the side. Branching from a flap, the longitudinally opposed end of the barrier cuff is bent inward in the width direction of the article and joined to the upper surface of the liquid-resistant sheet so as to cover the second portion of the foam member. .

In another embodiment of the present invention, the foamed member is a soft polyurethane foam, a synthetic rubber foam, or a polystyrene foam.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 are a partially cutaway perspective view of the diaper 1 and a sectional view taken along line AA of FIG. Diaper 1
Is a liquid-permeable topsheet 2 and a liquid-impermeable backsheet 3
And between the top sheet 2 and the back sheet 3,
It has an hourglass-shaped liquid-absorbent core 4 joined to the inner surfaces of these sheets 2 and 3, and has a front waist region 20, a rear waist region 22, and a front and rear waist region in the longitudinal direction intersecting the width direction. Area 2
And a crotch region 21 located between 0,22.

The front and rear waist regions 20 and 22 of the diaper 1 include:
Liquid sheet 5 wider than core 4 is top sheet 2
Is coated. The liquid-resistant sheet 5 includes a front and rear waist area 2.
0, 22 both ends 20a, 22a and both sides 20b,
22b are joined to the upper surface of the top sheet 2. The liquid resistant sheet 5 and the top sheet 2 are
Core 4 extending to front and rear waist regions 20 and 22 around 1
A first pocket P <b> 1 is formed at the upper portion of the first pocket P <b> 1 and opens toward the crotch region 21.

Inside the first pocket P1, an elastically deformable rectangular sheet-shaped foam member 10 bent through a bending shaft portion 10e bisected in the width direction is provided.
e is the both edge portions 20a, 22a of the front and rear waist regions 20, 22.
It is put toward the side of. The foam member 10 has a core 4
And a first abutment on the upper surface of the top sheet 2
It has a portion 10a and a second portion 10b located above the first portion 10a and in contact with the lower surface of the liquid-resistant sheet 5.

Both side edges 10c of the lower surface of the first portion 10a are
The upper surface of the second portion 10 b is joined to the lower surface of the liquid-resistant sheet 5. First
The pocket P1 is provided between the top sheet 2 and the first member
It opens toward the crotch region 21 between the portion 10a. The foam member 10 may be joined to at least one of the upper surface of the top sheet 2 and the lower surface of the liquid-resistant sheet 5 at the bent shaft portion 10e, and the lower surface of the first portion 10a and the upper surface of the second portion 10b. And at least one of the upper surface of the top sheet 2 and the liquid-resistant sheet 5
May be joined to any of the lower surfaces of the above.

The diaper 1 is formed with a pair of side flaps 23 extending outwardly in the width direction from both side edges 4a of the core 4. A concave portion 11 is formed in the side flap 23 inward in the width direction of the diaper 1, and a leg-surrounding elastic member 8 is interposed between the top sheet 2 and the back sheet 3 along the concave portion 11. The sheet is fixed to at least one of the inner surfaces of the sheets 2 and 3 in an extended state.

At both ends 20a and 22a of the front and rear waist regions 20 and 22 of the diaper 1, film-shaped waist elastic members 6 and 7 extending in the width direction along these ends are provided on the top sheet 2 and the top sheet 2, respectively. It is interposed between the back sheet 3 and is fixed to an inner surface of at least one of the sheets 2 and 3 in an extended state. On both side edges 22a of the rear waist circumference region 22,
A tape fastener 9 extending outward in the width direction of the diaper 1 is bent inward in the width direction of the diaper 1 and temporarily attached to the upper surface of the liquid-resistant sheet 5.

FIG. 3 is a view showing a section taken along line BB of FIG. The opening of the second pocket P2 is closed by being pressed against the abdomen and the back of the wearer. However, when the pressing force is released or weakened, the first portion 10a and the second portion 10b of the foam member 10 are mutually connected. The second portion 10b rises above the top sheet 2 because it is going to move in the separating direction, and the second pocket P2 is opened again.

The foamed members 10 are each made of soft,
Urethane foam, synthetic rubber foam, and polystyrene foam can be used. Preferably, these have a Shore hardness of 5 to 40 and a thickness of 4 to 7 mm. These can be used in either continuous foaming or closed foaming. However, continuous foaming is preferred from the viewpoint of air permeability.

The liquid-resistant sheet 5 is a gas-permeable or non-gas-permeable, liquid-impermeable or liquid-impermeable sheet.
As the liquid-resistant sheet 5, for example, a plastic film, a plastic film having fine air-permeable holes, a nonwoven fabric having a high fiber density made of hydrophobic fibers, or the like can be used. The portion of the liquid-resistant sheet 5 extending from the edge of the diaper 1 may be bent toward the lower surface of the back sheet 3 and joined to the back sheet 3 there.

The excrement flowing into the first pocket P1 penetrates the top sheet 2 and is absorbed by the core 4, and the excrement flowing into the second pocket P2 is absorbed by the foam member 10. When the second pocket P2 is pressed against the wearer's abdomen and back, the excrement exudes from the foam member 10 and moves to the first pocket P1, passes through the top sheet 2 and passes through the core 4
Is absorbed by The excrement is obstructed by the liquid-resistant sheet 5 located on the upper surface of the second portion 10b, and is prevented from exuding outside.

It is conceivable that a thread-like or film-like elastic member is fixed to the opening end of the liquid-resistant sheet 5 in an extended state and the pocket is opened by the contraction force. Stiffness is increased and the feeling of wearing is impaired. In this diaper 1, a soft foam member 1
Since 0 is used, the cushioning property is good and the feeling of wearing is not impaired.

FIGS. 4 and 5 are a partially cutaway perspective view of the diaper 1 in a mode different from that of FIG. 1 and a view taken along the line CC of FIG. As shown in FIG. 4, the diaper 1 includes an elastic member 8 fixed to a side flap 23 and both side edges 4 of the core 4.
A pair of barrier cuffs 12 branching upward from the side flaps 23 extend in the longitudinal direction of the diaper 1. An elastic member 13 extending in the longitudinal direction is fixed to the free side edge 12b of the barrier cuff 12 in an extended state, and the barrier cuff 12 can be raised above the top sheet 2 by the contraction force of the elastic member 13.

Longitudinal facing end 12a of barrier cuff 12
Is folded inward in the width direction of the diaper 1, and is joined to the upper surface of the liquid-resistant sheet 5 so as to cover both side edges 10d of the second portion 10b of the foam member 10.

When the second portion 10b of the second pocket P2 rises above the top sheet 2, the opposing ends 1 of the barrier cuff 12 located on both side edges 10d of the second portion 10b.
Since 2a also rises together, the free side edge 12b of the barrier cuff 12 easily rises above the top sheet 2 together with the contraction force of the elastic member 13.

The top sheet 2 is made of a hydrophobic non-woven fabric treated with a hydrophilic agent or a hydrophilic non-woven fabric formed of fibers into which the hydrophilic agent has been kneaded. Fine openings may be provided in these nonwoven fabrics.

As the back sheet 3, a synthetic resin film or a laminate sheet of a synthetic resin film and a hydrophobic nonwoven fabric is used. The core 4 is a mixture of fluff pulp and superabsorbent polymer particles, is compressed to a required thickness, and is entirely covered with a liquid-permeable sheet such as tissue paper.

According to the present invention, the foam member 10 inside the first pocket P1 may be bent so as to have a W-shaped cross section, or the folded foam member 10 may be vertically folded. It is also possible to use one in which two are overlapped and the lower surface of the foam member 10 located above and the upper surface of the foam member 10 located below are joined to each other.

[0027]

According to the disposable diaper according to the present invention,
Even if the second pocket formed by the first part and the second part of the foam member is crushed, the first part and the second part of the foam member try to move in the direction away from each other,
The pocket can be reopened.

In the wearing article having the barrier cuff, the opening in the second pocket allows the longitudinally opposite end of the barrier cuff to rise up above the top sheet.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a disposable diaper.

FIG. 2 is a view showing a cross section taken along line AA of FIG. 1;

FIG. 3 is a view showing a cross section taken along line BB of FIG. 1;

FIG. 4 is a partially cutaway perspective view of the disposable diaper in a different mode from FIG.

FIG. 5 is a view showing a cross section taken along line CC of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 disposable diaper 2 liquid-permeable top sheet 3 liquid-impermeable back sheet 4 liquid-absorbent core 4 a side edge 5 liquid-resistant sheet 8 first elastic elastic member 10 elastic foam member 10 a first part 10 b second part 10 e folding Curved shaft portion 12 Barrier cuff 12a Opposite end 13 Second elastic elastic member 20 Front waist region 21 Inseam region 22 Rear waist region 23 Side flap P1 First pocket P2 Second pocket

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B029 BD09 BD10 BD12 BD13 BD14 4C098 AA09 CC03 CC08 CC10 CC15 CE06 CE07 DD01 DD04 DD10 DD13

Claims (3)

[Claims] 1. A liquid-permeable topsheet, a liquid-impervious backsheet, and a liquid-absorbent core interposed between these sheets, and a front waist region in a longitudinal direction intersecting the width direction. A rear waist region, and a crotch region located between the front and rear waist regions. At least one of the front and rear waist regions is covered with a liquid-resistant sheet covering the top sheet. The top sheet and the liquid-resistant sheet joined to an edge portion and both side edge portions of a surrounding area, and the crotch area is located above the core extending to the waist area around the crotch area. A disposable diaper forming a first pocket opening in the direction of, wherein an elastic foam member bent via a bending shaft portion bisected in the width direction is provided inside the first pocket. With the bent shaft part facing the edge of the waist circumference area The foam member is accommodated in the upper portion of the core, and the foam member is joined to at least one of an upper surface of the top sheet and a lower surface of the liquid-resistant sheet that abut inside the first pocket; The first of the foam members abutting on the upper surface of the top sheet
A portion and a second portion of the foam member positioned above the first portion and in contact with a lower surface of the liquid-resistant sheet form a second pocket that opens in a direction toward the crotch region. The diaper as described above. 2. A pair of side flaps are formed on the diaper so as to extend outward in the width direction from both side edges of the core and to which a first elastically stretchable member is attached in the longitudinal direction. Between the elastic member and the side edge of the core, a barrier cuff capable of attaching a second elastic elastic member in the longitudinal direction and rising up the top sheet by its contraction force branches off from the side flap, 2. The liquid-resistant sheet according to claim 1, wherein a longitudinally opposed end of the barrier cuff is bent inward in a width direction of the article and is joined to an upper surface of the liquid-resistant sheet so as to cover a second portion of the foam member. Diapers. 3. The diaper according to claim 1, wherein the foamed member is any one of a soft polyurethane foam, a synthetic rubber foam, and a polystyrene foam.