JP2003199788A - Throwaway absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent the side leakage of urine or the like in either a position of lying on the back or a position of lying on the side. <P>SOLUTION: Free end parts 4a of a front part and a rear part of a rising flap 4 are respectively jointed to the inner surface of a girth guard 5. Consequently, when the free end part 5c side of the girth guard 5 rises with the resilience of an elastic string 18, the free end parts 4a of the front part and rear part of the rising flap 4 also rises with the rising force. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable absorbent article. 2. Description of the Related Art Conventionally, disposable absorbent articles, such as pants-type disposable diapers, have waist openings formed above the front abdomen and the back part, and both sides of the crotch between the front part and the back part. Pants-type exterior sheet in which leg openings are formed, an absorbent main body joined to the skin side of the exterior sheet, and base ends are joined to both sides of the absorbent main body,
Left and right rising flaps joined in an extended state with elastic members extending in the front-rear direction at the free end, and front and rear waist guards arranged so as to cover the upper front and upper rear of the rising flap Has been proposed (see Japanese Patent Laid-Open No. 2001-252303). In such a prior art, a pocket is formed by a waist guard that covers the upper part of the rising flap and the upper part of the rear part, thereby preventing leakage of urine and the like from the waist opening. By the way, the front and rear portions of the left and right rising flaps are joined to the surface of the absorbent main body in a lying state, so that they usually do not stand up. Accordingly, when the wearer urinates in a supine position (sleeps up) or in a lateral position (sleeps sideways), the absorbent body could not absorb it. When urine etc. enters the pocket of the waist guard, leakage of urine etc. from the waist opening can be prevented, but there is a risk that urine etc. may leak sideways over the front part and rear part where the rising flap does not rise. An object of the present invention is to provide a disposable absorbent article capable of effectively preventing side leakage of urine or the like in a supine position or a lateral position, in order to solve the above-described conventional problems. It is. In order to solve the above-mentioned problems, the present invention provides a waist opening formed above the front abdomen and the back part, and a crotch part between the front part and the back part. A pants-type exterior sheet in which leg openings are formed on both sides, an absorbent main body joined to the skin surface side of the exterior sheet, and a base end part joined to both sides of the absorbent main body, and a free end The left and right rising flaps, which are joined in a stretched state with elastic members extending in the front-rear direction, and the front and rear waist guards arranged so as to cover the front upper part and the rear upper part of the rising flaps are provided. The elastic member extending in the left-right direction is joined in an expanded state, and both end portions and the outer end portion are joined to the exterior sheet, and the inner end portion is formed as a free end portion. Standing The present invention provides a disposable absorbent article characterized in that the front and rear free ends of the rising flap are joined to each other. According to the present invention, when the front end and the rear free end of the rising flap are respectively joined to the inner surface of the waist guard, when the free end of the waist guard is raised by the elastic force of the elastic member, the rising Because the force can also raise the front and rear free ends of the rising flap, when the wearer urinates in a supine position (sleeps up) or in a lateral position (sleeps sideways), If urine that could not be absorbed by the absorbent main body enters 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, so this part Lateral leakage of urine etc. can be prevented. 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. . DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a pants-type disposable diaper 1, FIG. 2 is a plan view of a developed state, FIG. 3 is a front view of a completed state, and FIG. 4 is a schematic view of a waist guard 5 and a rising flap 4 standing up. 2A is a perspective view, FIG. 5A is a state where the waist guard 5 and the rising flap 4 are not raised, and FIG.
Schematic diagram corresponding to the line cross section, FIG.
And the rising flap 4 is not raised,
FIG. 3B is a schematic view corresponding to a cross section taken along line BB in FIG. 2 in a standing state. The pants-type disposable diaper 1 basically comprises an exterior sheet 2, an absorbent main body 3, left and right rising flaps 4, and front and rear waist guards 5. The exterior sheet 2 includes a first exterior (outer surface) sheet 7, a second exterior (skin surface) sheet 8, and leg elastic yarns 9.
And elastic yarn 10 for waist and elastic yarn 11 for body fitting
It consists of and. 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 are provided with legs on both sides of the crotch R between the front abdomen P and the back part Q. An opening S is formed. Each of the exterior sheets 7 and 8 is made of a synthetic fiber nonwoven fabric excellent in air permeability. The upper surface of the first exterior sheet 7 has a semicircular shape along the opening edge of each leg opening S. The leg elastic yarn 9 is attached in an extended state to form a leg elastic portion, and the waist elastic yarn 10 extends linearly 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 by being attached in the state. 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. Then, on the upper surface of the first exterior sheet 7,
The exterior sheet 2 is formed by bonding the second exterior sheet 8 in a state where the elastic yarns 9 to 11 are sandwiched. The exterior sheet 2 has a main body 3 that absorbs urine and the like.
Therefore, it is not necessary to use a liquid-impervious 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, the nonwoven fabric is made into one layer or two layers,
It may be a composite sheet having a function added by interposing another non-woven fabric, for example, a melt-blown non-woven fabric. Furthermore, in order to make the synthetic fiber nonwoven fabric feel good,
A nonwoven fabric highly blended with natural fibers and recycled fibers can also be used in combination. Nonwoven fabric materials include polyolefin fibers made of polypropylene or polyethylene, polyester fibers made of polyethylene terephthalate, synthetic fibers such as polyamide fibers made of nylon, cellulose fibers such as cotton, recycled fibers, pulp fibers, and the like. Among these, a spunbond nonwoven fabric and a polyester spunbond nonwoven fabric made of polypropylene are preferably used more comprehensively in terms of water repellency, strength, cost, and the like. The elastic yarns 9 to 11 can be made of polyurethane yarn, polyurethane film, natural rubber, urethane foam, or the like. The absorbent main body 3 is composed of a vertically long rectangular top sheet 13, a back sheet 14, and an absorbent material 15. An hourglass shape may also be used. Then, with the absorbent material 15 sandwiched between the top sheet 13 and the back sheet 14, the outer peripheral edges of the sheets 13 and 14 are bonded together to complete the absorbent main body 3. The absorptive 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. 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 a single fiber of a fiber but what consists of what combined said fiber may be sufficient. 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. The region is preferably made of hydrophilic fibers. However, in order to prevent urine absorbed by the absorbent 15 from exuding to the outside, the both end regions in the vertical direction and the both end regions in the horizontal (width) direction are made water repellent. Or can be made of a water-repellent fiber material. 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. The absorbent 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. Alternatively, it may be a non-pulp type in which a superabsorbent 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. As the above high-grade aqueous polymer, starch-based, cellulose-based or synthetic polymer-based polymers 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. 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. The left and right rising flaps 4 are set to have substantially the same length as the absorbent main body 3, and flap elastic yarns 17 are provided on the upper folded portions (free ends) 4a of the rising flaps 4. Each upper folded portion 4a comes up naturally by being attached in an extended state in the front-rear direction (see FIGS. 4 and 6B). The rising flaps 4 are separated from each other in the width direction of the absorbent main body 3, and the base end portion 4b is submerged in the lower part of the absorbent main body 3 so that the back sheet 14 of the absorbent main body 3 is covered. By adhering to the back surface, the absorbent main body 3 with a rising flap is configured. 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 the lengthwise direction in the folded middle portion ( (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). On the inner surface of each of the waist guards 5, the upper folded portions (free ends) 4a of the front and rear portions of the rising flaps 4 are bonded a (see cross-hatching in FIG. 2). As the rising flap 4 and the waist guard 5, a water-repellent sheet is preferable, and a non-woven fabric alone or a laminated sheet of a non-woven fabric and a synthetic resin film can be used. Nonwoven fabrics include spunbond nonwoven fabric, spunbond nonwoven fabric-meltblown nonwoven fabric-spunbond nonwoven fabric, spunbond nonwoven fabric-meltblown nonwoven fabric-meltblown nonwoven fabric-spunbond nonwoven fabric,
A heat roll nonwoven fabric, an air through nonwoven fabric, etc. are mentioned, As a film, the film which consists of thermoplastic resins, such as polyethylene and a polypropylene, is mentioned. The rising flap 4 and the waist guard 5 are preferably made of a synthetic fiber non-woven fabric which is water-repellent or waterproofed at least on the inner surface side, and the outer surface is water-repellent or waterproofed from the viewpoint of touch. Preferably, the fiber is not hydrophilized, but may be a hydrophobic fiber. 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 a plurality of them may be provided. The exterior sheet 2 to which the absorbent main body 3 is attached is folded back and forth with the crotch portion R as a boundary, and the both side edges 1a of the front part P and the back part Q are joined together, The pants-type disposable 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. The pants-type disposable diaper 1 configured as described above has a base end portion 4b of the rising flap 4 adhered to both sides of the absorbent main body 3 attached to the exterior sheet 2, and a front portion of the rising flap 4 Both end portions 5a and outer end portions 5 of the waist guard 5 covering the upper and rear upper portions
b is bonded to the exterior sheet 2, and the front flap and the upper folded portion (free end portion) 4a of the rising flap are bonded to the inner surface of the waist guard 5 respectively. Accordingly, 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) of the rising flap 4 by the rising force. Edge) 4a
Urine, etc. that could not be absorbed by the absorbent main body 3 when the wearer urinated in a supine position (sleeping upward) or a lateral position (sleeping sideways). When entering the guard 5 pocket, the girth guard 5
As a result, leakage of urine and the like from the waist opening can be prevented and the front and rear portions of the rising flap 4 are also raised, so that side leakage of urine and the like from this portion can also be prevented. Further, since the front and rear portions of the left and right 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 increased. Will be improved. When the front end and the rear end of the rising flap 4 are bonded to the inner surface of the waistline guard 5, the left and right rising flaps 4 and the front and rear waistguards 5 form a box shape in which the four sides are sealed. Lateral leakage such as urine can be completely prevented. As is apparent from the above description, the present invention is such that the front and rear free ends of the rising flap are joined to the inner surface of the waistline guard, respectively.
When the free end of the girth guard is raised by the elastic force of the elastic member, the rising force also raises the front and rear free ends of the rising flap, so that the wearer lies in a supine position (sleeps upward) ) When urinating, etc., in the posture or lateral position (sleeping sideways), if urine that could not be absorbed by the absorbent main body enters the pocket of the waistline guard, leakage of urine etc. from the waist opening by the waistline guard Since the front part and the rear part of the rising flap are also raised, it is possible to prevent side leakage of urine and the like from this part. 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 waistline guard and the rising flap are not raised, and FIG. 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] 1 Pants-type disposable diaper 2 Exterior sheet 3 Absorbent body 4 Standing flap 4a Upper folded part (free end part) 5 Girth guard 5a Both edge parts 5b Outer end part 5c Inner end part (free end part) 17 Elastic yarn for flap 18 Elastic yarn for guard P Front abdomen Q Rear back R Crotch S Leg opening

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaru Fujioka             89-1, Oyamakita, Ota, Sadamitsu-cho, Mima-gun, Tokushima Prefecture             Toyo Sanitary Co., Ltd. Sadamitsu Tokushima Factory (72) Inventor Taichiro Suzuki             89-1, Oyamakita, Ota, Sadamitsu-cho, Mima-gun, Tokushima Prefecture             Toyo Sanitary Co., Ltd. Sadamitsu Tokushima Factory (72) Inventor Sayaka Sato             89-1, Oyamakita, Ota, Sadamitsu-cho, Mima-gun, Tokushima Prefecture             Toyo Sanitary Co., Ltd. Sadamitsu Tokushima Factory F-term (reference) 3B029 BD09 BD10 BD12 BD13 BD14                 4C098 AA09 CC01 CC10 CC12 CC15                       CC28 CE05 DD01 DD03 DD06                       DD10 DD22 DD23 DD24 DD25                       DD26 DD28 DD30

Claims (1)

What is claimed is: 1. A pant-type body comprising a waist opening formed above the front abdomen and the back part, and leg openings formed on both sides of the crotch between the front part and the back part. An exterior sheet, an absorbent main body joined to the skin side of the exterior sheet, a base end part joined to both sides of the absorbent main body, and an elastic member extending in the front-rear direction joined to the free end part in an expanded state Left and right rising flaps, and front and rear waist guards arranged so as to cover the upper front and rear upper portions of the rising flaps are provided, and elastic members extending in the left-right direction are extended in the waist guards. At the same time, 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. The front and rear free end portions of the rising flap are formed on the inner surface of the waistline guard. Disposable absorbent article, characterized in that respectively are joined.