JPH0924063A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the flap of a disposable diaper in stable contact with the upper end of a user's thigh or the neighborhood thereof. SOLUTION: This disposable diaper 2 has stretchable inner and outer flaps 16 and 17 on both right and left sides, each having a propensity of standing from a skin contact area, and at least the front end of both front and rear ends of the inner flap 16 is positioned at nearer the lengthwise center of the diaper 1 than the front end of the outer flap 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 4-218159 discloses a disposable diaper having inner and outer flaps that are raised by elastic expansion and contraction on both left and right sides. In this diaper, the inner flap relatively weakly presses the wearer's thigh root or its vicinity, and the outer flap relatively weakly presses the thigh. Each of the inner and outer flaps is tilted inward or outward of the diaper, and the opposite ends thereof are joined and fixed to the skin-contacting surface of the opposite ends of the diaper.

[0003]

When a diaper is worn, the elastic waistline edge is appropriately stretched in the circumferential direction. Also, when a diaper wearer vigorously moves,
The waist edge of the diaper stretches and moves well. therefore,
In the diaper in which the front and rear opposite ends of the inner and outer flaps are fixed to the waist circumference edge as in the above-mentioned known technique, the inner flap which is intended to contact the root of the thigh or the vicinity thereof is affected by the waist circumference edge. It is easy to move, and in some cases it may shift from the thigh root. Such deviations cause fluid leakage and the inner flap fails to achieve its intended purpose.

Therefore, the present invention has an object to eliminate the cause of the fluid leakage by arranging at least the front end portion of the inner flap of the inner and outer flaps of the diaper near the center in the longitudinal direction of the diaper. ing.

[0005]

The present invention is premised on having a front and rear body and a crotch region in which a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, A flap having a propensity to stand up from the skin-contacting surface due to contraction in the longitudinal direction of the front and rear bodies is a disposable diaper extending in the longitudinal direction on each of the left and right side portions of the skin-contacting surface, and the feature thereof is that of the flap. Each of the inner and outer flaps is formed by an inner flap and an outer flap that are parallel to each other, and each of the inner and outer flaps has front and rear end portions, a base portion extending between the both end portions, and a free edge portion parallel to the base portion,
The both end portions and the base portion are joined to the skin-contacting surface, the elastic edge member is joined to the free edge portion, and at least the front end portion of the front and rear end portions of the inner flap is more than the front end portion of the outer flap. It is located closer to the center in the longitudinal direction of the diaper, and preferably the other rear end is also located closer to the center in the longitudinal direction than the rear end of the outer flap.

[0006]

In the diaper thus constructed, at least the front end portion of the front and rear end portions of the inner flap is located closer to the center in the longitudinal direction of the diaper, in other words,
By being spaced relatively far from the waist circumference edge of the diaper, the inner flap is not easily affected by the movement of the waist circumference edge and stably abuts the thigh root.

[0007]

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

A disposable diaper 1 shown in a partially cutaway perspective view in FIG. 1 has a front body 2, a back body 3 and a crotch region 4, and the inner surfaces of the front and rear bodies 2, 3 facing the left and right side edges are sealed. 6 is intermittently joined and has a pants (brief) type having a waist opening 7 and a pair of left and right leg openings 8. A waist elastic member 10A and a leg elastic member 10B extend around the periphery of each of the openings 7 and 8.

FIG. 2 shows the diaper 1 of FIG.
FIG. 4 is a partially cutaway plan view showing a state in which the sheet is peeled off in the above and extended in the front-rear longitudinal direction. The diaper 1 includes a laminate 15 in which a liquid-absorbent core 13 is interposed between a liquid-permeable topsheet 11 and a liquid-impermeable backsheet 12, and inner flaps 16 extending in the front-rear direction on the left and right sides of the laminate 15. And the outer flap 17.

In the laminate 15, the front and back sheets 11, 1
Reference numeral 2 denotes an inner surface of a portion extending from the peripheral edge of the core 13, which is joined to each other with a hot melt adhesive (not shown), and has side flaps 18 positioned in the left-right direction and end flaps 19, 20 positioned in the front-rear direction. Is formed. Side flaps 18
Has a recessed portion 22 that fits around the legs, and the leg-surrounding elastic member 10B located inside thereof has front and back sheets 11, 1
It is interposed between the two sheets and is joined to at least the inner surface of one of the sheets in an extended state. The waist elastic members 10A in the end flaps 19 and 20 are also the front and back sheets 1
It is interposed between 1 and 12, and is joined to at least the inner surface of one of the sheets in an extended state.

The inner flap 16 and the outer flap 17 are formed by bending one sheet 50 along a fold curve described later that extends in the front-rear direction of the diaper. In the diaper 1 extended as shown in the figure, the inner flap 16 is tilted inward and the outer flap 17 is tilted outward.

3, 4 and 5 are shown in FIG.
FIG. 4 is an end view of the line, IV-IV line, and V-V line, showing a bent state of the seat 50 at the front end portions of the inner and outer flaps 16 and 17 and substantially the center of the diaper 1 in the front-rear direction, and the skin-contacting surface of the seat 50. And the state of joining to. In FIG. 3, sheet 5
No. 0 is bent along an imaginary bending curve located at the portions A, B, C, and D, and is joined in a non-separable manner by a hot melt adhesive 51 shown by small points. Inner flap 1
6, the inner surface of the outer flap 17 is joined to the top sheet 11, and the outer flap 17 has an inner sheet portion 52 and an outer sheet portion 53 formed by bending the sheet 50 at the portion D. Are bonded to each other at least near the portion D. The inner surface sheet portion 52 is bent at the portion C, and the inner surfaces facing each other are joined, and the outer surface sheet portion 53 is joined to the outer surface of the inner flap 16. A portion 54 where the inner sheet portion 52 extends laterally is a base portion of the outer flap 17 and is joined to the top sheet 11.
The rear end portions of the inner and outer flaps 16 and 17 have substantially the same sectional structure as the front end portions. In FIG. 4, the inner flap 16 is again joined to the topsheet 11. On the other hand, the outer flap 17 joins the inner sheet portions 52, and the outer sheet portion 53 and the inner flap 16 together.
The outer surface of the base sheet 54 is not joined to the outer surface of the top sheet 11.
Is joined to. The second elastic member 2 is provided inside the bent portion D.
4 is joined in the stretched state. In this sectional view, when the second elastic member 24 contracts, the outer flap 17 rises from the topsheet 11. In FIG. 5, a first elastic member 23 for the inner flap 16 and a second elastic member 24 for the outer flap 17 are joined to the inside of the bent portions A and D in an expanded state. The inner and outer flaps 16 and 17 are joined to the topsheet 11 at their bases. In this sectional view, when the first and second elastic members 23 and 24 contract, the inner and outer flaps 16 and 17 stand up.

The plane shapes of the inner and outer flaps 16 and 17 are
It is as shown in FIG. The front end portion of the inner flap 16 has a surface sheet 1 between the front body edge 2A and the distance P.
1, and the rear end portion is joined to the topsheet 11 between the rear body edge 3A and the distance R. Further, the front end portion and the rear end portion of the outer flap 17 are joined to the topsheet 11 between the distances Q and R, respectively. Preferably, P ≧ 40 mm and Q ≧ 20 mm, and P is larger than Q by 20 mm or more. The value of R can be determined regardless of P and Q, but preferably R ≧ 20 mm
To

When the diaper 1 is constructed in this manner, the inner flap 16 is not easily affected by the expansion and contraction of the waist peripheral edge portion at least in the front body 2, and is stably abutted on the wearer's thigh root or its local vicinity. It will be possible. On the other hand, the outer flap 17 prevents leakage of body fluid flowing laterally above the front end portion of the inner flap 16. Further, in the rear body 3 part of the diaper 1, in addition to aligning the positions of the rear end portions of the inner and outer flaps 16 and 17 at a distance R as shown in the figure, preferably, like the front body 2, of the inner flap 16 The rear end portion is positioned closer to the center of the diaper 1 than that of the outer flap 17. When the diaper 1 is curved in the front-back direction with the surface sheet 11 inside, the first and second elastic members 23 and 24 contract, and the inner and outer flaps 1
6 and 17 show a tendency to stand up from the surface sheet 11 between the front and rear ends.

In the illustrated example, the inner and outer flaps 16 and 17 are 1
It is composed of a number of sheets 50, but those flaps 1
6 and 17 can be made of different sheet materials. The direction in which each of the flaps 16 and 17 falls is not limited to the illustrated example, and both can be tilted inward or outward. Non-woven fabric or plastic film can be used for the sheet 50, and if necessary, surface treatment is applied to them so that the inner and outer flaps 16, 1
In addition to making both 7 hydrophilic or hydrophobic, it is also possible to make one hydrophilic and the other hydrophobic.

In the present invention, the diaper 1 is illustrated in FIG.
In addition to the pants type, the well-known and open type may be used. The front and back sheets 11, 12 and the liquid-absorbent core 13 are made of known or well-known materials in the technical field. To bond the respective members, in addition to an adhesive such as a hot-melt adhesive, heat melting Welding techniques for compliant materials can be utilized.

[0017]

In the diaper according to the present invention, in the inner flap of the stretchable inner and outer flaps having the propensity to stand up from the skin surface, at least the front end portion of the front and rear end portions is more than the front end portion of the outer flap. Since it is located closer to the center in the front-rear direction and is spaced apart from the waist edge, the inner flap will expand and contract even if the edge expands or contracts.
Stable contact with the thigh root of the wearer or in the vicinity thereof without being affected by the effect, sufficiently exerting the side leakage prevention effect of body fluid.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a diaper.

FIG. 2 is a partially cutaway plan view of the diaper stretched back and forth.

FIG. 3 is an end view taken along line III-III of FIG. 2;

FIG. 4 is an end view taken along line IV-IV of FIG. 2;

5 is an end view taken along line VV of FIG.

[Explanation of symbols] 1 diaper 2 front body 3 back body 4 inseam area 11 top sheet 12 back sheet 13 liquid-absorbent core 16 inner flap 17 outer flap 23, 24 elastic stretchable members

Claims (2)

[Claims] 1. A front and back body and a crotch region in which a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and from the skin surface due to the longitudinal contraction of the front and back body. Is a disposable diaper extending in the longitudinal direction on each of the left and right sides of the skin-contacting surface, each of the flaps is constituted by an inner flap and an outer flap parallel to each other, Each of the front and rear end portions, and a base portion extending between the both end portions,
At least one of the front and rear end portions of the inner flap having a free edge parallel to the base, the both ends and the base are joined to the skin-contacting surface, and elastic elastic members are joined to the free edge. The diaper, wherein the front end portion is located closer to the center in the longitudinal direction of the diaper than the front end portion of the outer flap. 2. The diaper according to claim 1, wherein the rear end of the inner flap is also located closer to the center in the longitudinal direction of the diaper than the front end of the outer flap.