JPH09122174A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent leak from the waist with pocket structure at the section of the waist by arranging a waist sheet on the surface sheet of the waist part and forming the waist side part of a diaper on a side outer than the position of bonding with side flaps. SOLUTION: An absorber is arranged between a liquid permeable front surface sheet 1 and a liquid impermeable rear sheet, side flap part flexible members 9 and waist flap flexible members 10 are respectively arranged on side flaps 6 and waist flaps 8 extended from both the side edges and both the terminal edges of the absorber. Further, a waist sheet 4 is arranged on the front surface sheet 1 at the waist part over a front body part and a rear body part while fitting one side edge along the terminal edge of the diaper and bonded with the waist flaps 8 and the side flaps 6, and waist side parts 12 are formed at the sections extending outside outer than the positions bonded with the side flaps 6. On the waist sheet 4, pockets 11 are formed by gaps from the front surface sheet 1 by the shrinking power of the side flap flexible members 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper, and more particularly to a disposable diaper having a waist leakage preventing effect.

[0002]

2. Description of the Related Art A disposable diaper has a structure in which a hydrophilic sheet, a cotton-like pulp, and an absorbent body made of a super absorbent polymer are arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet. ing. Since the use of highly water-absorbent polymeric substances in the absorbent body of disposable diapers in recent years, it has become extremely effective against leakage and reversion of urine and the like. However, a high-viscosity product such as stool has a problem that the surface sheet does not have sufficient permeability and flows over the surface to spread to cause leakage from the waist portion.

Many proposals have been made to prevent such leakage. For example, JP-A-62-1
No. 82910, JP-A-63-182402,
JP-A-64-26701, JP-A-3-13665
Japanese Patent Laid-Open No. 4-1024 proposes that a second waist flap is further provided on the waist flap to form pockets.
Japanese Patent Laid-Open No. 52-52452 and Japanese Patent Laid-Open No. 4-102452 propose that the surface sheet itself is lifted from the absorber to form a pocket-shaped structure. However, these diapers have a complicated structure, so if you try to obtain the effect as designed, you have to pay close attention to wearing it, so it is not practically effective and the manufacturing efficiency is also low. There was a problem that it was inferior.

Further, Japanese Patent Laid-Open No. 3-218751
JP-A-3-202057, JP-A-5-49658
In Japanese Patent Laid-Open Publication, a sheet in which a further opened sheet is installed on the surface sheet is proposed. However, in these cases, it is difficult to arrange a sheet having an opening in a specific position of the diaper in the manufacturing process, and since the sheet is punched out to form the opening, a large amount of material is wasted. There is a point.

[0005]

As described above, the conventional disposable diaper has a structure for preventing leakage from the waist portion, but since the structure is complicated, it is not always effective in practical use or manufacturing. It wasn't something. SUMMARY OF THE INVENTION It is an object of the present invention to overcome the problems of conventional disposable diapers and to provide a disposable diaper having a simple structure in which the pocket structure formed in the waist portion effectively prevents leakage from the waist. It is a thing.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between the sheets, and both longitudinal edges of the absorber. A waist flap that extends outwardly from the side flap, and side flaps that extend from both side edges along the longitudinal direction of the absorbent body, and the side flaps have elastic elastic members arranged along the longitudinal direction of the absorbent body. In a disposable diaper that has a waist sheet having a length longer than the width of the diaper on the front sheet and the waist sheet of the front body and the back body of the diaper, one side edge of which is a longitudinal edge of the diaper. Along the waist flap and the side flap, and due to the contracting force of the elastic elastic member arranged on the side flap, it is separated from the topsheet when worn, and the topsheet Pocket formed between lies further the side flaps disposable diaper, characterized in that the portion extending outwardly around the waist side of the diaper is formed from the joining position of the. The present invention also resides in a disposable diaper characterized in that the waist sheet has air permeability. Furthermore, the present invention resides in a disposable diaper characterized in that a stretchable elastic member is arranged at the waist flap portion.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will now be described in more detail with reference to the drawings, but the present invention is not limited to the drawings.

FIG. 1 shows a partially cutaway plan view of a disposable diaper of the present invention. In FIG. 1, the disposable diaper of the present invention has an absorbent body 3 disposed between a liquid-permeable top sheet 1 and a liquid-impermeable back sheet 2, and extends from both side edges and both end edges of the absorbent body 3. A side flap elastic elastic member 9 and a waist flap elastic elastic member 10 are respectively arranged on the side flaps 6 and the waist flaps 8 that have come out. Further, in the diaper of the present invention, a waist sheet 4 is arranged on the surface sheet 1 around the waist of the front body 13 and the back body 14, one side edge of which is arranged along the edge of the diaper,
The waist flap 8 and the side flaps 6 are joined to each other, and a waist circumference side portion 12 is formed by a portion extending outward from the joining position of the side flaps 6. Fastener tapes 5 for fastening are attached to both side edges of the waistline sheet 4 of the waistline side portion 12 of the rear body 14.

FIG. 2 is a perspective view showing the unfolded diaper according to the present invention. In FIG. 2, the waist sheet 4 arranged on the waist portion of the diaper is a side flap 6
Due to the contracting force of the side flap portion elastic member 9 arranged at, the pocket 11 is formed between itself and the topsheet 1. In this case, by disposing the waist flap stretchable elastic member 10 on the waist flap 8, the fitting property at the time of wearing is improved, the opening of the pocket 11 is enlarged, and leakage can be prevented more effectively.

In the disposable diaper of the present invention, second side flaps that branch from the side flaps 6 and stand upright may be formed on both side edges in the longitudinal direction of the diaper, whereby the crotch of urine or feces is formed. It is possible to more effectively prevent the leak from. In this case, the second side flap may be formed of the same material as the sheet forming the side flap 6, or may be formed of another material.

FIG. 3 shows the disposable diaper of FIG.
A cross-sectional view taken along line X ′ is shown. In FIG. 3, the absorber 3 is arranged between the topsheet 1 and the backsheet 2, and the portions of the topsheet 1 and the backsheet 2 extending from both side edges of the absorber 3 are joined to form the side flaps 6. The side flap portion elastic member 9 is formed between the top sheet 1 and the back sheet 2 of the side flap 6. Further, the waistline sheet 4 is arranged on the topsheet 1, joined by side flaps 6, and the waistline side portion 12 is formed by a portion extending outward from a joint portion with the side flaps 6. .

In FIG. 3, the side flap 6 is formed by joining the top sheet 1 and the back sheet 2 together.
You may form a side flap as shown in Unexamined-Japanese-Patent No. 4-9153, using a sheet different from these both sheets. In this case, the sheet used is preferably water-repellent in order to prevent leakage of urine from the absorber.

FIG. 4 shows the disposable diaper of FIG. 2 as YY '.
A sectional view taken along a line is shown. In FIG. 4, the absorber 3 is disposed between the topsheet 1 and the backsheet 2, and the portions of the topsheet 1 and the backsheet 2 extending from both ends of the absorber 3 are joined to form the waist flap 8. Formed,
A waist flap portion elastic member 10 is disposed between the top sheet 1 and the back sheet 2 of the waist flap 8. The waistline sheet 4 on the topsheet 1 is separated from the topsheet 1 and forms a pocket 11 with the topsheet 1.

In the present invention, the waist sheet 4 is 10 to 35% of the entire length in the longitudinal direction from the longitudinal edge of the diaper,
More preferably, it is attached so as to cover the range of 20 to 30%. If the range of the waist sheet 4 that covers the diaper is less than 10% of the entire length in the longitudinal direction from the longitudinal edge of the diaper, the pocket 11 having a sufficient size cannot be formed, so that the leakage prevention effect is significantly deteriorated. . On the other hand, if it exceeds 35%, the size of the pocket 11 is sufficient, but since the opening is not located at an appropriate place, excrement may leak out without being stored in the pocket. .

Further, in FIG. 4, the waist sheet 4 is arranged on the front body 13 and the back body 14, but the pocket 11 formed by the waist sheet 4 is relatively viscous like stool rather than urine. Since it is more effective for tall ones, a sufficient effect can be obtained even if it is arranged only on the back body 14.

Further, in FIG. 4, the waist flap 8
Is formed by joining the top sheet 1 and the back sheet 2, but a sheet made of a material different from the top sheet is used.
It may be formed by laminating with the back sheet.

As the surface sheet 1, a liquid-permeable nonwoven fabric made of polyester, polypropylene or the like, a woven fabric, a porous plastic film, a porous foam, a reticulated foam or the like is used. Also, natural fibers (eg, wood fibers, cotton fibers, etc.) may be used, and combinations of synthetic fibers and natural fibers, etc.
It can be manufactured from a wide range of materials. In any case, since the topsheet 1 is the part that directly contacts the skin,
Anything that is soft and comfortable to the touch will do.

The back sheet 2 is made of a liquid impermeable film such as polyethylene, a material obtained by laminating a liquid permeable film with a non-woven fabric, a woven fabric, etc., or a leakproof non-woven fabric, a woven fabric, etc., and is not particularly limited. Instead, any material may be used as long as the moisture in the absorbent body does not seep outside the diaper. When a film is used, a known breathable film that is liquid impermeable but allows only water vapor to pass through may be used, and is more preferable because it prevents stuffiness.

The absorbent body 3 is sandwiched between the top sheet and the back sheet 2, and is mainly composed of cotton-like pulp and a superabsorbent polymer material, but is not particularly limited, and a absorbent sponge, A water absorbent sheet may be used as long as it has a water absorbing ability. The flocculent pulp in the present invention is a chemical pulp, a mechanical pulp, or a sheet of a chemical mechanical pulp made into a flocculate by a pulverizer. As the pulp raw material, not only conifers, but also hardwoods, straws, bamboos, bagasses, and the like are applied.
Further, synthetic fibers, heat-sealing components, adhesives, etc. may be contained together with the cotton-like pulp.

As the superabsorbent material, starch polymer,
Acrylic acid polymers, celluloses, and the like that absorb 50 times or more water by weight, and polyacrylic acid-based ones such as sodium polyacrylate are most preferable in terms of absorption performance. Also, the shape is not particularly limited, such as a fiber shape, a granular shape, and a sheet shape. In the absorbent body, the high-absorbent polymer substance may be mixed with the cotton-like pulp, or may be laminated in layers with the cotton-like pulp.

Since the waist sheet 4 plays a leak-proof function, it is preferably water-repellent and may be liquid-impermeable, but it is preferably made of a material that is breathable and can prevent stuffiness. A non-woven fabric composed of ultrafine fibers is suitable.
For example, a sheet formed from a plurality of non-woven fabrics such as a non-woven fabric manufactured by the melt blown method (hereinafter referred to as MB non-woven fabric) and a non-woven fabric manufactured by the spunbond method (hereinafter referred to as SB non-woven fabric) can be applied. Specific examples include a leakproof, flexible, and breathable material such as a composite sheet having a three-layer structure in which an MB non-woven fabric is sandwiched between SB non-woven fabrics and a sheet in which the MB non-woven fabric and the SB non-woven fabric are hydroentangled. .

[0022]

According to the present invention, by having the above-mentioned structure, a pocket structure effective for preventing leakage from the waist portion, particularly leakage of highly viscous material, is formed, and a simple pocket structure is formed. It is now possible to provide a disposable diaper having a composition.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a disposable diaper of the present invention.

FIG. 2 is a perspective view showing a state where the disposable diaper of the present invention is expanded.

FIG. 3 is a cross-sectional view of the disposable diaper of FIG. 2 taken along line XX ′.

4 is a cross-sectional view of the disposable diaper of FIG. 2 taken along line YY '.

[Explanation of symbols]

 1. Liquid permeable top sheet 2. 2. Liquid-impermeable back sheet Absorber 4. Waist sheet 5. Tape fastener 6. Side flaps 8. Waist flap 9. Side flap elastic elastic member 10. Waist flap portion elastic member 11. Pocket opening 12. Waist around side 13. Front body 14. Back body

Claims (3)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between the two sheets, and a waist flap extending outward from both longitudinal edges of the absorber. And a side flap extending from both side edges along the longitudinal direction of the absorbent body, wherein the side flap is a disposable diaper in which an elastic elastic member is arranged along the longitudinal direction of the absorbent body, wherein the diaper A waist sheet having a length longer than the width of the diaper is disposed on the waist sheet of the front body and the back body, and one side edge thereof is arranged along the longitudinal edge of the diaper, The waist flap and the side flaps are joined to each other, and due to the contracting force of the elastic member arranged on the side flaps, they are separated from the topsheet when worn, and a pocket is formed between the topsheet and the topsheet. A disposable diaper characterized in that a waist circumference side portion of the diaper is formed by a portion that is formed and further extends outward from a joint position with the side flap. 2. The disposable diaper according to claim 1, wherein the waist sheet is breathable. 3. The disposable diaper according to claim 1, wherein an elastic elastic member is arranged on the waist flap portion.