JPH069625U - Disposable diapers - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent fluid leakage around the legs of disposable diapers. [Structure] Bent parts 10 having a Z-shaped cross section in the width direction are provided on both sides of the crotch part 7 of the disposable diaper 1. In the folded portion 10, the absorber 4 is interposed between the front and back sheets 2 and 3, and the elastic second flap 1 is provided on the outer edge of this portion 10.
2 is formed, and a first elastic member is formed inside the portion 10.
The flap 13 is joined to the topsheet 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a disposable diaper.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there is known a technique of providing a stretchable flap for abutting the leg around the side of the crotch part in order to prevent body fluid from leaking around the leg of the disposable diaper. For example, U.S. Pat. No. 4,695,278 discloses a technique in which an elastic stretchable member is attached to a sheet-shaped or sleeve-shaped flap member under stretching to form a stretchable flap, and absorption between front and back sheets. A technique is disclosed in which a side edge including a body is bent toward the surface side of a diaper with a substantially L-shaped cross section to form a fold, and an elastic stretchable member is arranged on the fold to form a stretchable flap.

[0003]

[Problems to be solved by the device]

 In the above-mentioned prior art, the elastic fluid can be prevented by abutting the stretchable flap around the leg, but the contraction force is strengthened and / or the elasticity is strengthened as one of means for ensuring the prevention. It is conceivable to increase the number of elastic members to increase the adhesion to the skin. However, in this case, there is a problem in that the elastic stretchable member strongly digs into the wearer's skin, hinders blood circulation, and impairs the feeling of wearing the diaper. In the above technology in which the side edge including the absorber is bent into an L-shape to form a flap, it is expected that the amount of the flap including the absorber improves the body fluid absorption capacity in the leg surrounding area and helps prevent leakage. The presence of the body increases the rigidity of the flap, and even if an elastic elastic member is arranged, the flap is poor in elasticity, and therefore it is difficult for the flap to adhere to the circumference of the leg, which may cause unexpected leakage of body fluid.

Therefore, in the present invention, the side edge portion including the absorber is bent in a Z-shape in cross section in at least a part of the crotch part of the disposable diaper, and the elastic first sheet is formed on the surface sheet inside the bent portion. By providing a flap and an elastic second flap on the outer edge of this bent portion, reliable prevention of body fluid leakage around the leg and high absorption capacity can be realized all at once, and the problems of the above-mentioned conventional techniques can be realized. To solve the problem.

[0005]

[Means for Solving the Problems]

 The gist of this device to solve the above problems is as follows.

This invention is composed of a water-permeable top sheet, a water-impermeable back sheet, and an absorbent body interposed between these sheets, and the diaper longitudinal direction is between the front body and the back body and between these body parts. It is premised on a disposable diaper consisting of a crotch located at.

In such a diaper, at least in the crotch part, the side edge portion where the absorbent body is interposed between the front and back sheets is folded along the first fold curve along the longitudinal direction of the diaper, and is laid on the diaper surface side. By folding back the folded side edges further outward along the second folding curve which is inside the first folding curve and is parallel to this, a folding portion having a Z-shaped widthwise cross section is provided on both sides of the diaper. is there. Further, the facing surface sheets are joined to each other by being folded over to the surface side, and the elastic stretchable members extending in the longitudinal direction of the diaper inside the second folding curve and being stretched in the longitudinal direction are provided. While the stretchable first flap that is attached is joined to the topsheet, the topsheet and backsheet that extend outward from the side edges of the absorber are joined to the side edges after folding back. Further, a characteristic is that an elastic elastic member under stretch is adhered between these two sheets to provide an elastic second flap along the longitudinal direction of the diaper.

[0008]

[Action]

 In the diaper according to the present invention, there are bent portions having a Z-shaped cross section in which absorbers are interposed on both sides of the crotch part of the diaper, and by locating these portions around the legs, the amount of body fluid absorbed around the legs can be increased. This part has high rigidity due to the presence of the absorbent body, but since elastic first and second flaps are provided on the inside and outside of the diaper so as to sandwich this part from both sides, these flaps adhere closely to the legs. In addition to reliably preventing bodily fluid leakage, it is possible to improve the leak prevention effect by closely fitting the bent portion around the legs.

[0009]

【Example】

 The details of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a disposable diaper 1 according to the present invention. The diaper 1 comprises a water-permeable top sheet 2, a water-impermeable back sheet 3, an absorbent body 4 interposed between these two sheets 2, 3 and the like, and the longitudinal direction is a front body 5, a back body 6, and both body bodies 5, 5. It is composed of a crotch portion 7 located between the six. Tape fasteners 8 are attached to both side edges of the back body 6, and bending portions 10 along the longitudinal direction of the diaper are provided on both sides of the crotch portion 7, and outer edges of the portion 10 have elastic stretchable members 11. It is the elastic second flap 12. An elastic elastic member 14 is provided inside the portion 10, and an elastic first flap 13 joined to the surface sheet 2 extends in the longitudinal direction of the diaper. Further, the rear body 6 has an elastic stretchable member 16 which is stretched and attached between the front and back sheets 2 and 3 in parallel with the edge 21 so that the waist portion of the rear body is stretchable.

FIG. 2 is a sectional view taken along line II-II in FIG. 1 and shows a sectional shape of the crotch part 7. The side portion of the crotch portion 7 is folded inward along the imaginary first folding curve 15 located at a distance A from the center line CL in the width direction of the diaper 1, and further on the first portion located at a distance B from the center line CL. The fold portion 10 has a Z-shaped folded cross section toward the outside of the diaper along a virtual second fold curve 16 inside the fold curve 15. The surface sheets 2 facing each other when folded are locally bonded to each other with a hot melt adhesive 9. The outer edge of the bent portion 10 joins the front and back sheets 2 and 3 extending outward from the side edge of the absorbent body 4 to each other, and an elastic stretchable member 11 interposed between the both sheets 2 and 3. The diaper is stretched in the longitudinal direction and adhered to at least one of the sheets. The second flap 12 expands and contracts to fit around the wearer's leg.

Further, in FIG. 2, a stretchable first flap 13 is provided inside the bent portion 10. One side edge 17 of the first flap 13 is joined to the topsheet 2 by a hot melt adhesive 19, and the other side edge 18 is a free end, which extends in the longitudinal direction of the diaper. The elastic stretchable member 14 is attached to the elastic stretchable member 14. The elastic stretchable member 14 is covered by folding a part of the side edge 18 and adhering it. The first flap 13 falls down toward the inside of the diaper in the vicinity of the edges 20 and 21 of the diaper 1, and the side edge 18 is joined to the topsheet 2 (see FIG. 1). Both ends of the elastic expansion / contraction member 14 are fixed to the topsheet 2 via the above-mentioned joining, so that the member 14 can be expanded / contracted. When the diaper 1 is worn, the first elastic member 14 causes the first flap 13 to stand up on the topsheet 2 in the crotch part 7, and the first flaps 13 standing up close to the wearer's inseam or around the legs. FIG. 2 shows the first flap 13 which has been thus erected.

In the diaper 1, a non-woven fabric or a perforated plastic film is used for the topsheet 2, a plastic film is used for the backsheet 3, a mixture of crushed pulp and a superabsorbent polymer is used for the absorber 4, and a first flap 13 is used. Materials such as non-woven fabric and perforated plastic film can be used. The material of the first flap 13 is preferably liquid permeable or breathable liquid permeable, but in some cases it may be liquid impermeable.

FIG. 3 shows one of the embodiments different from FIG. 2, in which the one side edge 17 of the first flap 13 is inserted between the facing surface sheets 2 at the folding portion 10, and the surface sheet 2 is inserted. Are bonded to each other with a hot melt adhesive 19. In this way, the joint portion between the side edge 17 and the topsheet 2 does not touch the wearer's skin and the wearing feeling is improved. The facing topsheets 2 can be joined to each other via this side edge.

FIG. 4 shows still another embodiment, in which a sleeve-shaped first flap 13 made of a liquid-permeable sheet is provided with an absorber 30 in the longitudinal direction, and the first flap 13 absorbs some body fluid. It has the ability to prevent leakage around the legs.

FIG. 5 shows still another embodiment, in which the side edge 17 of the first flap 13 in which the liquid-permeable sheet is folded in two is joined to the topsheet 2, and the edge portion 1 of this sheet is The joint 17 'is joined to the top portion 10' of the bent portion 10. By doing so, it is possible to prevent the first flap 13 and the bent portion 10 from moving integrally and prevent a gap from being formed between the bent portion 10 and the leg periphery.

[0017]

[Effect of device]

 In the diaper thus constructed, the first flap is provided on the innermost side of the diaper, and the first flap is in close contact with the wearer's body to prevent fluid leakage around the legs. There is a bent portion on the outer side of the first flap, and since this portion has an absorbent body, it absorbs body fluid flowing out beyond the first flap and prevents leakage of body fluid. Furthermore, there is a second flap on the outside of the bent portion, and this second flap is elastic and adheres well to the circumference of the leg to prevent fluid leakage, while keeping the bent portion close to the leg, It exerts the effect of bringing them into close contact with each other, suppresses the formation of a gap between the bent portion and the leg periphery, and prevents body fluid from leaking from the gap.

[Brief description of drawings]

FIG. 1 is a perspective view of a diaper according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view showing an embodiment different from FIG.

FIG. 4 is a sectional view showing still another embodiment.

FIG. 5 is a sectional view showing still another embodiment.

[Explanation of symbols]

 1 Diaper 2 Top Sheet 3 Back Sheet 4 Absorber 5 Front Body 6 Back Body 7 Crotch 10 Folding Part 11 Elastic Elastic Member 12 Second Flap 13 First Flap 14 Elastic Expandable Member 15 First Folding Curve 16 Second Folding Curve

Claims (1)

[Scope of utility model registration request] 1. A water-permeable top sheet, a water-impermeable back sheet, and an absorber interposed between these two sheets,
A disposable diaper having a front body and a back body in the longitudinal direction of the diaper, and a crotch part located between these body parts, at least in the crotch part, a side edge part in which an absorber is interposed between the front and back sheets. Folded along the first fold curve along the longitudinal direction of the diaper to the diaper surface side, and further along the second fold curve parallel to the line at the folded side edge portion inside the first fold curve. It is folded back to the outside, and a bending portion having a Z-shaped cross section in the width direction is provided on both sides of the diaper, and the facing surface sheets are joined to each other by the folding at the bending portion, and the diaper is inside the second folding curve. The elastic first elastic member that extends in the longitudinal direction and is attached to the elastic first elastic member is bonded to the surface sheet while the side edge portion after the folding is the above-mentioned. A top sheet and a back sheet that extend outward from the side edge of the absorbent body are joined to each other, and an elastic elastic member under extension is attached between these sheets to provide elasticity along the longitudinal direction of the diaper. The disposable diaper, wherein a second flap is provided.