JP3884292B2 - Disposable absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable absorbent article.
[0002]
[Prior art]
Conventionally, as a disposable absorbent article, for example, a pants-type disposable diaper, a waist opening is formed above the front abdomen and the back part, and leg openings are formed on both sides of the crotch part between the front part and the back part. A pants-type exterior sheet, an absorbent main body joined to the skin side of the exterior sheet, and an elastic member having a base end joined to both sides of the absorbent main body and extending in the front-rear direction to the free end There has been proposed one provided with left and right rising flaps joined in an extended state, and front and rear waist guards arranged so as to cover the upper front portion and the rear upper portion of the rising flap (Japanese Patent Laid-Open No. 2001-252303). No. publication).
[0003]
In such a conventional technique, a pocket is formed by a waist guard that covers the front upper part and the rear upper part of the rising flap, thereby preventing leakage of urine and the like from the waist opening.
[0004]
By the way, since the front part and the rear part of the right and left rising flaps are joined to the surface of the absorbent main body in a lying state, they usually do not stand up.
[0005]
[Problems to be solved by the invention]
Therefore, when the wearer urinates in a supine position (sleeps upward) or in a lateral position (sleeps sideways), if urine that could not be absorbed by the absorbent main body enters the waist guard pocket, Although leakage of urine etc. from the opening can be prevented, there is a risk that urine etc. may leak sideways across the front and rear where the rising flap does not rise.
[0006]
The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a disposable absorbent article that can effectively prevent side leakage such as urine in a supine position or a lateral position.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is a pants type in which a waist opening is formed above the front abdomen and the back part, and leg openings are formed on both sides of the crotch part between the front part and the back part. The outer sheet, the absorbent main body bonded to the skin surface side of the outer sheet, the base end portion is bonded to both side portions of the absorbent main body, and the elastic member extending in the front-rear direction is extended to the free end portion. The left and right rising flaps joined to each other, and the front and rear waist guards arranged so as to cover the upper front part and the rear upper part of the rising flaps are provided. And both end portions and outer end portions are joined to the exterior sheet and the inner end portion is formed as a free end portion, and the front and rear free end portions of the rising flap are formed on the inner surface of the waistline guard. It is intended to provide a disposable absorbent article, characterized in that each junction.
[0008]
According to the present invention, when the free end portion of the front and rear portions of the riser flap is joined to the inner surface of the waistline guard, respectively, when the free end side of the waistline guard is raised by the elastic force of the elastic member, The front and rear free ends of the rising flaps can be raised, so when the wearer urinates in a supine position (sleeps up) or in a lateral position (sleeps sideways), the absorbent body If the urine that could not be absorbed in the pocket of the waist guard, the waist guard can prevent leakage of urine etc. from the waist opening, and the front and rear of the rising flap also stand up. It becomes possible to prevent side leakage such as. Moreover, since the front part and the rear part of the right and left rising flaps are not joined to the surface of the absorbent main body as in the prior art, the absorption area of the absorbent main body is increased correspondingly, so that the absorption efficiency is improved. .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
1 is an exploded perspective view of a pants-type disposable diaper 1, FIG. 2 is a plan view in an unfolded state, FIG. 3 is a front view in a completed state, and FIG. 4 is a schematic perspective view in a state in which a waist guard 5 and a rising flap 4 are raised. FIG. 5A shows a state in which the waist guard 5 and the rising flap 4 are not raised, FIG. 5B is a schematic view corresponding to the cross section taken along line AA in FIG. 2, and FIG. 6A is a waist guard. FIG. 5 is a schematic view corresponding to a cross section taken along line B-B of FIG. 2 in a state where the rising flap 4 and the rising flap 4 are not raised, and FIG.
[0011]
The pants-type disposable diaper 1 basically includes an exterior sheet 2, an absorbent main body 3, left and right rising flaps 4, and front and rear waist guards 5.
[0012]
The exterior sheet 2 includes a first exterior (outer surface) sheet 7, a second exterior (skin surface) sheet 8, leg elastic yarns 9, waist elastic yarns 10, and body fit elastic yarns 11.
[0013]
The first exterior sheet 7 and the second exterior sheet 8 are formed in the outer shape of the pants-type disposable diaper 1, and leg openings S are formed on both sides of the crotch R between the front abdomen P and the back Q. Is formed.
[0014]
Each of the exterior sheets 7 and 8 is made of a synthetic fiber nonwoven fabric excellent in air permeability, and the upper surface of the first exterior sheet 7 has a semicircular shape for leg elasticity along the opening edge of each leg opening S. The elastic portion for leg is formed by attaching the yarn 9 in the stretched state, and the waist elastic yarn 10 is attached in the stretched state in a straight line in the left-right direction along the outer edge of the front abdomen P and the back portion Q. The waist elastic portion is formed. Further, the body fit elastic portion 11 is attached to the upper portion of the front abdomen P and the back portion Q in a straight line shape in the left-right direction so as to form a body fit elastic portion.
[0015]
And the exterior sheet | seat 2 comes to be formed by adhere | attaching the 2nd exterior sheet | seat 8 in the state which pinched | interposed each said elastic yarn 9-11 to the upper surface of this 1st exterior sheet | seat 7. As shown in FIG.
[0016]
Since the exterior sheet 2 has a configuration in which urine or the like is basically blocked by the absorbent main body 3, it is not necessary to use a liquid-impermeable material having no air permeability, for example, a synthetic resin film material. Moreover, although it may be a single layer structure consisting of a single sheet, since it is necessary to bond the elastic yarns 9 to 11, a two layer structure is more preferable, and a structure having three or more layers is also possible. . Furthermore, the exterior sheet 2 is required to have a certain degree of tensile strength and is also required to be low in cost, and is preferably a spunbonded nonwoven fabric in that respect, but is not limited thereto, and may be a normal nonwoven fabric. There is no problem, and a composite sheet in which the nonwoven fabric is made into one layer or two layers and another nonwoven fabric, for example, a melt blown nonwoven fabric is inserted between the layers may be added. Furthermore, in order to improve the feel of the synthetic fiber nonwoven fabric, a nonwoven fabric highly blended with natural fibers and recycled fibers can be used in combination.
[0017]
Examples of the non-woven material include polyolefin fibers made of polypropylene and polyethylene, polyester fibers made of polyethylene terephthalate, synthetic fibers such as polyamide fibers made of nylon, cellulose fibers such as cotton, recycled fibers, and pulp fibers. Among these, a spunbond nonwoven fabric and a polyester spunbond nonwoven fabric made of polypropylene are preferably used more comprehensively, such as water repellency, strength, and cost.
[0018]
Each of the elastic yarns 9 to 11 can be a polyurethane yarn, a polyurethane film, natural rubber, urethane foam, or the like.
[0019]
The absorbent main body 3 is composed of a vertically long top sheet 13, a back sheet 14, and an absorbent material 15. An hourglass shape may also be used.
[0020]
Then, with the absorbent material 15 sandwiched between the top sheet 13 and the back sheet 14, the outer peripheral edges of both sheets 13, 14 are bonded together to complete the absorbent main body 3, and this absorbent main body 3 is attached by adhering a back sheet 14 to the surface of the crotch portion R of the second exterior (skin surface) sheet 8 of the exterior sheet 2.
[0021]
As the top sheet 13, for example, polyester, polypropylene, other thermoplastic synthetic fibers, liquid permeable nonwoven fabrics and woven fabrics made of natural fibers and recycled fibers are used. Not only what consists of fibers but what consists of what combined the above-mentioned textiles may be used.
[0022]
Further, the top sheet 13 is required to have a liquid permeability that allows the liquid to permeate quickly and directly touches the skin surface of the wearer. In order to prevent urine absorbed by the absorbent material 15 from exuding to the outside, is it necessary to make the both end regions in the vertical direction and both end regions in the horizontal (width) direction water repellent? It can also be composed of a water-repellent fiber material.
[0023]
The back sheet 14 is made of a liquid-impermeable film such as polyethylene, a leak-proof nonwoven fabric, or a woven fabric. When using a liquid-impermeable film, it is preferable to use a known moisture-permeable film in order to prevent stuffiness.
[0024]
The absorbent material 15 is mainly composed of a conventionally known cotton-like pulp formed by uniformly mixing a superabsorbent polymer in a cotton-like pulp layer and optionally blending a thermal binder fiber. It may be a non-pulp type in which a water-absorbing polymer is sandwiched between rayon nonwoven fabric layers. In the latter case, the absorbent material 15 is more preferable in that it becomes an extremely thin sheet-like material, eliminates the sensation of the pants-type disposable diaper 1, and can be constructed close to underwear.
[0025]
As the above high-grade aqueous polymer, starch-based, cellulose-based, synthetic polymer-based polymers and the like are used. That is, starch-acrylic acid (salt) graft polymer, saponified product of starch-ethyl acrylate graft copolymer, saponified product of starch-methyl methacrylate graft copolymer, saponified product of starch-acrylonitrile graft copolymer, Examples thereof include saponified starch-acrylamide graft copolymers, acrylic acid (salt) polymers, acrylic acid-crosslinked polyethylene oxide, sodium carboxymethylcellulose crosslinked products, and polyvinyl alcohol-maleic anhydride crosslinked products.
[0026]
As the cotton-like pulp, those having a fiber length of 5 mm or less obtained by defibrating a chemical pulp sheet, a waste paper pulp sheet, and a mechanical pulp sheet with a pulverizer are used. As the pulp raw material, not only coniferous trees but also hardwoods, straw, bamboo, kenaf and the like are used.
[0027]
The left and right rising flaps 4 are set to be substantially the same as the length of the absorbent main body 3, and flap elastic yarns 17 are arranged in the front-rear direction on the upper folded portion (free end) 4 a of each rising flap 4. Attached in the extended state, each upper folded portion 4a comes up naturally (see FIG. 4 and FIG. 6B).
[0028]
Each of the rising flaps 4 is bonded to the back surface of the back sheet 14 of the absorbent main body 3 with the base end portion 4b entering the lower portion of the absorbent main body 3 while being spaced apart in the width direction of the absorbent main body 3. By doing so, the absorptive main body 3 with a rising flap is comprised.
[0029]
The front and rear waist guards 5 are stretchable band bodies in which a long sheet is folded in a U-shape, and elastic yarns 18 are attached in an expanded state in the middle of the folding (see FIG. 1). ). In the stretched state, both ends 5a and the outer end 5b of the band body are bonded to the surface of the second exterior sheet 8 of the exterior sheet 2, and the inner end 5c is formed at the free end. The guard elastic yarn 18 naturally causes the inner end 5c side to rise up like a pocket entrance (see FIGS. 4 and 6B).
[0030]
On the inner surface of each girth guard 5, an upper folded portion (free end portion) 4a of the front and rear portions of each rising flap 4 is bonded a (see cross-hatching in FIG. 2).
[0031]
As the rising flap 4 and the waist guard 5, a water-repellent sheet is preferable, and a laminated sheet of a nonwoven fabric and a synthetic resin film can be used alone. Nonwoven fabrics include spunbond nonwoven fabrics, spunbond nonwoven fabrics-meltblown nonwoven fabrics-spunbond nonwoven fabrics, spunbond nonwoven fabrics-meltblown nonwoven fabrics-meltblown nonwoven fabrics-spunbond nonwoven fabrics, heat roll nonwoven fabrics, air-through nonwoven fabrics, etc. And a film made of a thermoplastic resin such as polypropylene.
[0032]
The rising flap 4 and the waist guard 5 are preferably made of a synthetic fiber non-woven fabric that is water-repellent or waterproofed at least on the inner surface side, and the outer surface is hydrophilized that has not been subjected to water-repellent or waterproofing treatment in terms of touch. Although it is preferably a fiber, it may be a hydrophobic fiber.
[0033]
As the flap elastic yarn 17 and the guard elastic yarn 18, polyurethane yarn or the like can be used as in the case of the elastic yarns 9 to 11, and not only one but also a plurality of yarns may be provided.
[0034]
And the exterior sheet | seat 2 which attached the absorptive main body 3 is folded into two back and forth with the crotch part R as a boundary, and the front edge part P and the both-sides edge part 1a of the back part Q are joined, respectively, and it is a pants type disposable. The diaper 1 is assembled in the completed state of FIG. A waist opening is formed above the front abdomen P and the back part Q, and leg openings S are formed on both sides of the crotch part R between the front abdomen P and the back part Q.
[0035]
The pants-type disposable diaper 1 configured as described above adheres the base end portion 4b of the rising flap 4 to both sides of the absorbent main body 3 attached to the exterior sheet 2, and the front upper portion and the rear portion of the rising flap 4 Both ends 5a and outer ends 5b of the girth guard 5 covering the upper side are bonded to the exterior sheet 2, and the front and rear upper folded portions (free ends) 4a of the rising flaps are formed on the inner surface of the girth guard 5. Each is bonded a.
[0036]
Therefore, when the inner end portion (free end portion) 5c side of the waist guard 5 rises by the elastic force of the guard elastic yarn 18, the front flap and the rear upper folded portion (free end portion) of the rising flap 4 are generated by the rising force. 4a can also be launched, so that when the wearer urinates in a supine position (sleeps upward) or a lateral position (sleeps sideways), urine etc. that could not be absorbed by the absorbent main body 3 When entering the pocket of the waist guard 5, the waist guard 5 can prevent leakage of urine and the like from the waist opening, and the front and rear portions of the rising flap 4 also stand up, preventing side leakage of urine and the like from this portion. become able to.
[0037]
Moreover, since the front part and the rear part of the right and left rising flaps 4 are not joined to the surface of the absorbent main body 3 as in the prior art, the absorption area of the absorbent main body 3 is increased accordingly, so that the absorption efficiency is improved. It becomes like this.
[0038]
When the front end and the rear end of the rising flap 4 are bonded to the inner surface of the girth guard 5, the left and right rising flaps 4 and the front and rear girth guards 5 form a box shape in which the four perimeters are sealed. Lateral leakage can be completely prevented.
[0039]
【The invention's effect】
As is clear from the above description, the present invention is such that the free end portion of the front and rear flaps is joined to the inner surface of the waist guard, so that the free end side of the waist guard is caused by the elastic force of the elastic member. When standing up, the rising force will also raise the front and rear free ends of the rising flap, so the wearer urinates in a supine (sleeping up) or lateral (sleeping) position. When urine etc. that could not be absorbed by the absorbent main body entered into the pocket of the waist guard when the etc. is done, the waist guard can prevent leakage of urine etc. from the waist opening and also the front and rear of the rising flap Since it stands up, it is possible to prevent side leakage of urine and the like from this portion. Moreover, since the front part and the rear part of the right and left rising flaps are not joined to the surface of the absorbent main body as in the prior art, the absorption area of the absorbent main body is increased correspondingly, so that the absorption efficiency is improved. .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a pants-type disposable diaper.
FIG. 2 is a plan view of the unfolded state.
FIG. 3 is a front view of a completed state.
FIG. 4 is a schematic perspective view of a state where a waist guard and a rising flap are raised.
5A is a schematic view corresponding to a cross section taken along line AA of FIG. 2 in a state where the waist guard and the rising flap are not raised, and FIG. 5B is a state in which the waist guard is raised.
6A is a schematic view corresponding to a cross section taken along line B-B in FIG. 2 in a state where the waistline guard and the rising flap are not raised, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Exterior sheet 3 Absorbent main body 4 Standing flap 4a Upper folded part (free end part)
5 Girth guard 5a Both edges 5b Outer end 5c Inner end (free end)
17 Elastic yarn for flap 18 Elastic yarn for guard P Front abdomen Q Rear back R Crotch S Leg opening

Claims (1)

A pants-type exterior sheet in which a waist opening is formed above the front abdomen and the back part, and leg openings are formed on both sides of the crotch between the front abdomen and the back part, and the skin surface side of the exterior sheet An absorptive main body joined to both sides, a base end part joined to both side parts of the absorptive main body, and left and right rising flaps joined to a free end part in an extended state, and the rising flaps Front and rear waist guards arranged so as to cover the front upper part and rear upper part are provided, and elastic members extending in the left-right direction are joined to the waist guard in an expanded state, and both end parts and outer end parts are provided. There inner end portion is bonded to the exterior sheet is formed in a free end, the free end portions of the front and rear of the rising flaps to the inner surface of the waist guards be bonded respectively, the Tachinobo By the front and rear flaps are not bonded to the surface of the absorbent body Ri, characterized in that the above-mentioned left and right rising flaps and said front and rear waist guards and in sealed four-around a box-shaped A disposable absorbent article.

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