JPH0856984A - Disposable bodily fluid absorbent wearing article - Google Patents

Abstract

PURPOSE: To improve the tight fit of an article around the legs so as to prevent the leakage of the bodily fluid and to improve wearing feel by joining and fixing the rear surfaces of leakproof diskes to the articles, covering their front surfaces with non-woven fabric and adhering elastic members elongated in a longitudinal direction on the tops of the front surfaces or the inside surfaces facing the tops of the non-woven fabric sheet. CONSTITUTION: A diaper 1 is formed by interposing a liquid absorbent core 4 between a liquid permeable front surface sheet 2 and a liquid impermeable rear surface sheet 3. Side flaps 5 are formed by joining the prescribed parts of the front and rear surface sheets 2, 3 extending sideways from the right and left side edges of this liquid absorbent core 4. The leakproof dikes 10 are extended at these side flaps 5 in the longitudinal direction of front and rear bodies 7, 8 around. Tape zippers 11 are extended from the side edges of the side flaps 5 at the rear body 8. The leakproof dikes 10 are bar- or sheet-shaped members having resilience and elasticity and the tops 12 thereof are coated with the front surface sheet 2. The elastic members 30 extended in the longitudinal direction of the diaper 1 are joined by hot melt adhesives, etc., to the front surfaces of the stop parts 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable body fluid absorbent wearing article such as a disposable diaper or a sanitary napkin which is used by contacting the inseam of a wearer.

[0002]

2. Description of the Related Art Conventionally, in a disposable body fluid absorbent wearing article such as a disposable diaper or a sanitary napkin, which is used by contacting with a crotch, a body fluid leak preventing dike extending in the front-rear direction is provided on both left and right sides of the inner surface of the crotch contact area. Providing is known in the art. For example, Japanese Utility Model Laid-Open No. 60-136308 discloses a technique for attaching a relatively wide sponge-like flexible elastic foam material to both sides of the crotch region of the diaper by stretching it in the front-back direction. . According to this technique, the foamed material shrinks and bulges in the direction of the wearer's crotch, forming a leakproof bank that is flexible and elastic. Also,
Japanese Utility Model Application Laid-Open No. 62-88704 discloses a technique of attaching a tape-like flexible elastic foam material made of polyurethane foam or the like on both sides of a crotch portion so that the cross section in the width direction becomes an Ω shape to form a leak-proof dike. are doing. According to this technique, it is possible to obtain a flexible leak-proof dike with good adhesion that closely follows the movement around the crotch and around the leg.

[0003]

By the way, in a wearing article in which a leak-proof bank is made of a flexible elastic material such as urethane foam, when the leak-proof bank is worn to bend the leak-proof bank along the crotch and around the legs, The leak-prevention dike has a restoring force that tends to return to its original shape, which may make it difficult for the wearer's body to adapt. As a result, there is a problem that a gap is created between the article and the body to cause a bodily fluid leak, or the wear feeling of the article is deteriorated if it does not occur.

In view of the above, the present invention has an object to solve the above-mentioned problem by attaching an elastic elastic member to the top of the leak preventer in an expanded state.

[0005]

[Means for Solving the Problems] The present invention provides means for solving the above problems as follows.

According to the present invention, there is a crotch contact area formed by interposing a liquid-absorbent core between a liquid-permeable top sheet and a liquid-impermeable back sheet, and at least on both the left and right sides of the inner surface of the area. It is premised on a disposable bodily fluid absorbent wearing article which has a bodily fluid leak preventive wall made of a flexible elastic material extending in the front-rear direction and which is used by abutting the inner surface of the wearer's crotch.

[0007] Under such a premise, the leak preventer is bonded and fixed to the article at the lower surface thereof, at least the upper surface thereof is covered with the non-woven fabric sheet, and the top of the upper surface or the portion facing the top of the non-woven fabric sheet is provided. It is a feature of the present invention that the elastic member extending in the front-rear direction is attached to the inner surface.

[0008]

In the disposable bodily fluid absorbent wearing article thus configured, the stretched elastic member attached to the inner surface of the top of the leak preventer or the portion of the nonwoven sheet facing the top contracts to prevent leakage. The bank has a tendency to curve in the front-rear direction with the apex facing inward, which improves the close contact of the article with the legs.

[0009]

The details of the body fluid absorbent wearing article according to the present invention will be described below with reference to the accompanying drawings by taking a disposable diaper as an example.

FIG. 1 is a partially cutaway perspective view of a disposable diaper 1 in a state in which it is stretched back and forth. The diaper 1 comprises a liquid-permeable top sheet 2 and a liquid-impermeable back sheet 3 with a liquid-absorbent core 4 interposed therebetween, and a table extending laterally from the left and right side edges of the liquid-absorbent core 4. The back sheets 2 and 3 form side flaps 5 by joining required parts to each other.
The front-back direction of the diaper 1 is composed of a front body 7, a back body 8, and a crotch region 9 interposed between the two bodies 7, 8, and the left and right side flaps 5 are centered around the crotch region 9. A leak preventive dike 10 extends in the longitudinal direction of the bodies 7, 8, and a tape fastener 11 is formed from the side edge of the side flap 5 in the rear body 8.
Is extended. The leak-proof dike 10 is a rod-shaped or sheet-shaped member having an appropriate cross-sectional shape such as a rectangular shape, a circular shape, or a trapezoidal shape that is flexible and elastic, and has a top portion (skin contacting surface side) 1
2 is in a state of being covered with the topsheet 2.

FIG. 2 is a sectional view taken along line XX of FIG.
The shape of the crotch region 9 of the diaper 1 is shown. Front and back sheets 2, 3
The peripheral portions 15 and 16 of each other are hot-melt adhesive 17
The absorbent body 4 and the leakproof dike 10 are joined to each other in a watertight manner by means of the hot-melt adhesive 17 so that their lower surfaces are joined intermittently to each other by the hot-melt adhesive 17, and their positions are fixed. If necessary, the absorber 4 and the leak preventer 10 may be joined to the surface sheet 2.

One or more elastic members 30 extending in the front-rear direction of the diaper 1 are joined to the upper surface of the top portion 12 of the leakproof bank 10 with a hot melt adhesive (not shown).

FIG. 3 is a side view of a main part of the leak preventer 10. In the diagram shown by phantom lines, the elastic member 30 contracts, and the longitudinal direction of the leak preventer 10 has the apex 12 inside. A curved state is shown. Although the elastic member 30 in the stretched state exhibits a contracting tendency, the lower surface of the leak preventer 10 is fixed to the back sheet 3, and the diaper 1 is curved like an imaginary line in the free state. Adhesion around the wearer's legs becomes easy.

FIGS. 4 and 5 are views similar to FIGS. 1 and 3 showing another example of the mode of the breakwater 10. In this diaper 1, the top portion 12 of the leak preventing dike 10 has a corrugated structure in which the convex portions 13 and the recesses 14 are alternately arranged in the front-rear direction in at least the crotch region 9 to facilitate the curving of the leak preventing dike 10.
In FIG. 5, a state in which the leak preventer bank 10 of the diaper 1 is curved is shown by an imaginary line. The leak preventer 10 has a height A and a depth B of the recess 14, and the dimensions A and B thereof and the recess 1 are provided.
Although the shape of No. 4 can be appropriately determined, the side walls 20 of the V-shaped concave portion 14 facing each other can be in close contact with each other to close the concave portion 14 when the leak preventer 10 is curved. It is preferable to prevent leakage of body fluids from the. However, since the curved state of the leak preventer 10 changes variously depending on the wearer, the height A of the leak preventer 10 may be increased while the depth B may be decreased to prevent side leakage. In the leak preventer 10, the elastic member 30 may be joined to the upper surface of the top portion 12 as well as to the inner surface of the portion facing the top portion 12 of the topsheet 2, whereby the corrugated structure of the elastic member 30 is formed. It is possible to avoid the difficulty of joining the parts. In addition, when joining like the latter, the surface sheet 2 is joined to the top 12 of the leak preventer 10 and the contracting force of the elastic member 30 acts on the top 12 of the leak preventer 10.

In the present invention, the leakproof dike 10 is made of a flexible and elastic independent or continuous foam material made of a thermoplastic such as polyurethane or polyethylene, and also has a compressive restoring force by crimping the fibers. It can also be made of a nonwoven fabric made of thermoplastic synthetic fiber. Leak breakwater 10
In addition to covering with the topsheet 2 by interposing it between the front and backsheets 2 and 3 as in the illustrated example, the side edges of the backsheet 3 are folded back to the inner surface of the diaper 1 to cover, After being coated with a third sheet other than the front and back sheet 3, it can be joined to the diaper 1. The leak-proof dike 10 can be used not only for the disposable diaper 1 but also for disposable sanitary napkins, training pants, incontinence diapers, urine absorbing pads, and the like. It should be noted that the front and back sheets 2, 3 and the liquid-absorbent core 4 can be made of a commonly used material in the relevant technical field, and well-known joining techniques and heat welding techniques can be used to join the respective members. .

[0016]

EFFECTS OF THE INVENTION In the disposable body fluid absorbent wearing article according to the present invention, since the elastic member extending in the front-rear direction is attached to the top of the leak preventer in a stretched state, the leak preventer bends with the top inward. It is possible to prevent the lateral leakage of body fluid by easily adhering to the wearer's body.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a body fluid absorbent article (disposable diaper).

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a side view of the main part of the leak preventer.

FIG. 4 is a perspective view similar to FIG. 1, showing an example of a mode of a breakwater.

FIG. 5 is a side view similar to FIG. 3, showing an example of a mode of a breakwater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body fluid absorbent wear article (disposable diaper) 2 Top sheet 3 Back sheet 9 Inseam contact area 10 Leakage dam 12 Top 30 Elastic member

Claims (1)

[Claims] 1. A crotch contact area formed by interposing a liquid-absorbing core between a liquid-permeable top sheet and a liquid-impermeable back sheet, and at least on the left and right sides of the inner surface of the area in the front-back direction. A disposable body fluid-absorbing wearing article which has a body fluid leak preventer of a flexible elastic material and which is used by abutting the inner surface to the wearer's crotch, wherein the leak preventive barrier is joined and fixed to the article at its lower surface. ,
At least its upper surface is covered with a non-woven sheet, and the elastic member extending in the front-rear direction is attached to an inner surface of a top portion of the upper surface or a portion of the non-woven sheet facing the top portion. Goods.