JP2000140009A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a disposable diaper which prevents side spillage when lying on the side while achieving excellent wearing touch. SOLUTION: An absorbing body 4 is disposed between a top sheet 2 and a back sheet 3 and a first solid gather 5 is formed over the overall length in the longitudinal direction thereof on both side rim parts of a side flap 10 extending from both side rims of the absorbing body 4 and the absorbing body 4 extending from both side rims of the absorbing body 4. A stretchable elastic member is disposed between a side sheet 6 forming the side flap 10 and the back sheet 3. Moreover, a second solid gather 7 is formed along the first solid gather 5 outside the first solid gather 5 on both side flaps of the front 8 and the back 9 of the body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper for use in infants or incontinent persons. More specifically, the present invention relates to a disposable diaper that prevents so-called side leakage, in which urine and loose stool leak from the side of the diaper when sleeping in a sideways posture.

[0002]

2. Description of the Related Art A disposable diaper has a structure in which an absorbent made of a hydrophilic sheet cotton-like pulp, a high-absorbent polymer material, or the like is disposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. It has become. In recent years, since the use of a high-absorbent polymer substance in an absorbent material for a disposable diaper has resulted in a tremendous effect on leakage and reversion of urine and loose stool. However, the superabsorbent polymer substance has an extremely low urine absorption rate as compared with cotton-like pulp, and may leak when urine, loose stool, or the like is excreted temporarily. For this reason, measures have been required to prevent leakage of a large amount of urine and loose stool. In addition, in the case of bedridden elderly people, they often sleep sideways, and leakage from the abdomen which occurs at this time is also a major problem in nursing care.

In order to solve these leakage problems, it has been proposed to arrange a three-dimensional gather outside the absorber. For example, Japanese Utility Model Laid-Open No. 62-153331, JP-A-62-223303, and JP-A-62-263.
In the diaper proposed in Japanese Patent Publication No. 50201, three-dimensional gathers are formed by raising the base end of the inner flap from the top sheet located on both sides in the width direction of the absorber. Furthermore, in the diaper proposed in JP-A-4-9153, a part of a liquid-permeable top sheet is used as an inner flap, and the base end of the inner flap is raised from both ends in the width direction of the absorber. I have.

[0004] Also, Japanese Patent Application Laid-Open No. Sho 63-219901,
JP-A-2-174845, JP-A-2-71521
Japanese Patent Application Laid-Open No. Hei 3-218752 proposes a double-structured solid gather as a leakage preventing function.

[0005]

Problems to be Solved by the Invention
In the case of the diaper disclosed in No. 11 or JP-A-62-223303 or JP-A-62-250201, since a three-dimensional gather is single, when excreting a large amount of urine at one time, Urine could get over three-dimensional gathers, causing leaks. Further, JP-A-4-
In the case of the diaper disclosed in No. 9153, when a large amount of urine is excreted or the absorption capacity of the absorber becomes saturated, urine exudes from three-dimensional gathers, and a large amount of urine is absorbed by the absorber in a state where a large amount of urine or the like is absorbed. When pressure is applied, urine and the like may ooze out from the widthwise side end of the absorber.

The diapers described in JP-A-63-21901, JP-A-2-174845, and JP-A-2-71521 are particularly designed to prevent leakage of excrement at the crotch. In addition, from the front body to the back body, a continuous three-dimensional gather is formed,
Actually bedridden elderly people often sleep sideways, most of the leaks are side leaks, and there is no need for double solid gathers at the inseam. Also, if there are excessive three-dimensional gathers in the crotch part, it may cause a reduction in the feeling of wearing. The present invention solves the above-mentioned problems of the conventional disposable diaper, is effective against side leakage in a state of sleeping in a horizontal position, and has a good feeling of wearing a crotch portion. The purpose is to provide.

[0007]

SUMMARY OF THE INVENTION The present invention provides a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber disposed between these two sheets, and both longitudinal edges of the absorber. In a disposable diaper having a side flap extending outwardly from the first side gathers formed over the entire length in the vicinity of both sides in the longitudinal direction of the absorber, the side flaps extend in the longitudinal direction of the absorber of the back sheet. A stretchable elastic member extends between the backsheet and the sidesheet, which are formed by a portion extending outward from both side edges and a sidesheet laminated thereon, and forming a side flap at least in a crotch region of the diaper. In addition, on both side flaps of the front body and the back body, outside the first three-dimensional gather, along the first three-dimensional gather About disposable diaper, characterized in that the second standing gather is formed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A disposable diaper according to the present invention has a second three-dimensional gather formed on the side flaps of the front and rear body and outside the first three-dimensional gather along the first three-dimensional gather. The disposable diaper of the present invention having such a configuration is configured such that when the wearer is sleeping in a sideways posture, urine and loose stool are discharged from the outside of the diaper by the action of two three-dimensional gathers formed on the side flaps. Leak out,
The effect of preventing so-called lateral leakage can be enhanced.

The top sheet used in the present invention is a hydrophilic or hydrophobic non-woven fabric, woven fabric, porous plastic film or the like, and its constituent fibers are polypropylene, polyethylene, polyester, nylon or polyester, polypropylene, polyethylene. Or a composite fiber composed of two or more components such as nylon or the like. In particular, a composite fiber of polyester / polyester or polypropylene / polyethylene is preferred from the viewpoint of strength, but is not particularly limited.

The top sheet does not need to be constituted by a single sheet, but may be constituted by a plurality of sheets, for example, by changing the sheet between the upper surface of the absorber and the side flaps. When the top sheet is composed of a plurality of sheets, each sheet may be made of a different material, or may be made of the same material.

As the back sheet used in the present invention, a liquid impermeable polyethylene sheet or the like can be used. More preferably, a polyethylene sheet provided with a large number of micropores that do not allow liquid molecules to permeate to prevent stuffiness, a moisture-permeable sheet stretched by adding a filler to a thermoplastic resin, or these sheets Since the excess moisture inside the diaper is released to the outside of the diaper, the composite sheet with the non-woven fabric bonded to the outside of the diaper makes it less likely that the diaper will become uneven and rash, making it more comfortable in terms of moisture permeability and touch. it can.

The absorbent used in the present invention is mainly composed of cotton-like pulp and a highly water-absorbing substance, but is not particularly limited, and may be a water-absorbing sponge or a water-absorbing sheet. However, it is preferable to adopt a laminated structure in which the whole is wrapped with tissue. Further, the shape of the absorber may be an hourglass type, a rectangular shape, or the like, but an hourglass type provides better fit. The cotton-like pulp in the present invention is a chemical pulp, a mechanical pulp, or a sheet of a chemical-mechanical pulp made into a floc with a crusher. The pulp raw material is not limited to softwoods, but hardwoods, straws, bamboos, and kenafs are also applicable. The amount of the pulp used varies depending on the intended absorber, for example, it may be used alone, a plurality of layers may be used, or another absorber may be used in combination, but is generally 50 to 400 g / m ² . Is done.
In addition, synthetic fibers, a heat-sealing component, an adhesive, and the like may be contained together with the cotton-like pulp.

As the highly absorbent material, starch-based, cellulosic, synthetic polymer-based materials and the like are used, and those which absorb water at least 20 times their own weight and polyacrylic acid-based materials have an absorption performance. Is most appropriate from the point of view. Also, the shape is not particularly limited, such as a fiber shape, a granular shape, and a sheet shape.

In the present invention, as the side sheet forming the side flap, a non-woven fabric made of synthetic fiber made of polyethylene, polypropylene, polyester, or other thermoplastic resin is used. A liquid non-permeable material may be formed by laminating a film made of a thermoplastic resin on a nonwoven fabric.

In the present invention, the first and second three-dimensional gathers are formed of a sheet made of a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, or the like, and the constituent fibers thereof are polypropylene, polyethylene, polyester, and nylon. Or a composite fiber or the like composed of two or more components such as polyester, polypropylene, polyethylene, and nylon.
Polypropylene / polyethylene composite fibers are preferred in terms of strength, but are not particularly limited. Also,
Those which do not have liquid permeability and have air permeability are preferred. Further, a stretchable elastic member may be arranged on the three-dimensional gather according to the purpose of use. When the elastic member is arranged, the fit of the wearer also increases, and the followability of the wearer to the movement increases.

As the elastic members, the elastic members used in ordinary disposable diapers such as urethane film, urethane thread, urethane foam, and thread rubber can be used as they are. In addition to the three-dimensional gather portion, it is disposed around the leg and waist, and is a water-soluble glue such as hot melt, starch-based or CMC (carboxymethylcellulose), or a highly fluid adhesive, or heat or ultrasonic waves And is fixed by welding.

Further, as a bonding method for forming the base end of the three-dimensional gather, hot melt bonding, pressure welding,
Ultrasonic fusion or the like can be used alone or in combination.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the disposable diaper of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to these embodiments. FIG. 1 is a partially cutaway plan view of a disposable diaper of the present invention. In FIG. 1, a disposable diaper 1 includes a liquid-permeable top sheet 2 and a liquid-impermeable back sheet 3, an absorber 4 disposed between these sheets, and both longitudinal edges of the absorber 4. Side flaps 10 extending outward from the
The first three-dimensional gathers 5 are formed on both side edges of the diaper 1 over the entire length of the diaper 1 in the longitudinal direction.
On the side flaps 10 of the front body 8 and the back body 9, a second three-dimensional gather 7 is formed outside the first three-dimensional gather 5 along the first three-dimensional gather 5. Further, in the crotch region 16 of the disposable diaper 1, the leg elastic members 13 are arranged in an extended state between the back sheet 3 and the side sheet 6 forming the side flaps 10, so that the rear body 9 has a long side. A waist elastic member 14 is arranged in the direction end region, and further, a side flap 10 on the back body 9 side.
Fastening tapes 15 are arranged on both side edges of.

FIG. 2 shows the diaper of FIG.
FIG. 3 is a cross-sectional view showing a state cut along a line. In FIG. 2, the disposable diaper 1 has an absorber 4 disposed between a top sheet 2 and a back sheet 3. Side flaps 10 by side seats 6 arranged in
A leg-surrounding elastic body 13 is arranged between the back sheet 3 and the side sheet 6 forming the side flaps 10. Also, both side edges of the top sheet 2 are folded back, and the elastic members 11 are arranged in an extended state inside the folded portion. The first three-dimensional gather 5 is formed to stand up. Further, a sheet separate from the top sheet 2, the back sheet 3, and the side sheet 6 is disposed on the side sheet 6, and the elastic member 12 is disposed in an extended state at a side edge located outside the diaper. In addition, the side edge located inside the diaper is joined to the side sheet 6, and the first solid gather 5 has an upright point 1.
A second three-dimensional gather 7 that rises in the outer direction of the diaper 1 is formed with the rising point 18 on the side sheet 6 outside the diaper 7.

FIG. 3 is a perspective view of the disposable diaper shown in FIG.
FIG. 3 shows a cross-sectional view taken along the line. In FIG. 3, only the first three-dimensional gathers 5 are formed on the used diaper 1 along both side edges on the absorber 4, and the second three-dimensional gathers do not exist.

FIG. 4 is a cross-sectional view showing an example different from FIG. 2 and showing a state where the disposable diaper of FIG. 1 is cut along the line XX ′. In FIG. 4, the second three-dimensional gather 7
Is formed of a sheet separate from the top sheet 2, the back sheet 3 and the side sheet 6, and the diaper 1 is provided with a standing point 18 on the side sheet 6 of the side flap 10.
Standing in the inward direction.

[0022]

As described above, in the disposable diaper according to the present invention, the second three-dimensional gathers are formed on the side flaps of the front and rear bodies outside the first three-dimensional gathers along the first three-dimensional gathers. It is possible to provide a disposable diaper which is effective for side leakage in a state of sleeping in a horizontal position and has a good wearing feeling in a crotch region.
Further, the disposable diaper having such a configuration according to the present invention can provide an inexpensive diaper having a smaller amount of material than a conventional disposable diaper having double three-dimensional gathers.

[0023]

[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 cross-sectional view showing a state in which the disposable diaper of FIG. 1 is cut along the line XX ′.

FIG. 3 is a cross-sectional view showing a state where the disposable diaper of FIG. 1 is cut along the line YY ′.

FIG. 4 is a cross-sectional view showing an example different from FIG. 2 and showing a state where the disposable diaper of FIG. 1 is cut along a line XX ′.

[Explanation of symbols]

 1: Diapers that are used 2: Top sheet 3: Back sheet 4: Absorber 5: First three-dimensional gathers 6: Side seats 7: Second three-dimensional gathers 8: Front body 9: Back body 10: Side flaps 11: First Elastic elastic member of three-dimensional gather 12: Elastic elastic member of second three-dimensional gather 13: Elastic elastic member around legs 14: Elastic elastic member around waist 15: Fastening tape 16: Inseam portion 17: Standing point of first three-dimensional gather 18: First Standing point of two-dimensional gather

Claims (1)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between these two sheets, and side flaps extending outward from both longitudinal edges of the absorber. And a disposable diaper having first three-dimensional gathers formed over the entire length near both longitudinal edges of the absorber, wherein the side flaps extend outward from both longitudinal edges of the absorber of the backsheet. Portion, formed by a side sheet laminated thereon, and, at least between the back sheet and the side sheet forming a side flap in the crotch region of the diaper, a stretchable elastic member is disposed in an extended state, Further, on both side flaps of the front body and the back body, a second solid gather is formed outside the first solid gather along the first solid gather. Disposable diapers, characterized in that it has been.