JPH10243960A - Absorbent articles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a leakage preventing effect by permitting free ends and a return line where an extention/contraction elasatic member is arranged with a part where side flaps are adhered and fixed as a base end part to be erected upwards and forming double solid gathers in an inseam area at the time of wearing. SOLUTION: In an absorptive object 1 consisting of a tope sheet 2, a back sheet 3, a rectangular absorbing body 4 and the side flaps 5 extending outwards from the both side edges of the absorbing body 4, the double solid gathers 16 and 17 are formed in a center area. The side flaps 5 are adhered and fixed to the wide width part of the absorbing body 4 in its both longitudinal direction end parts in the folded part in the top sheet 2 and the extension/contraction elastic member 7 is arranged each in the return line 14 and the both side edges 15. Then, a part between the return lines 14 and the side edges 15 is adhered and fixed to the top sheet 2 along the side edges of the absorbing body 4, the free edges 6 of the flaps are erected upwards with the above adhered part as the base end part 8 and the double solid gathers 16 and 17 are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent pad used for infants or incontinent persons, an absorbent article used for a disposable diaper and the like.

[0002]

2. Description of the Related Art An absorbent article is disclosed in Japanese Patent Application Laid-Open No. 3-280.
JP-A-951 and JP-A-5-184622 propose an absorbent article having three-dimensional gathers that are arranged along both longitudinal edges of an absorber and that stand up toward the wearer's body.

[0003] Japanese Patent Application Laid-Open Nos. 63-21901, 2-174845, 2-71521, and 3-218752 disclose a three-dimensional structure having a double structure as a leak preventing function. Gathered ones have been proposed.

[0004]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Laid-Open No. 3-280 is disclosed.
No. 951 and Japanese Patent Application Laid-Open No. 5-184622 disclose absorbent articles along the both longitudinal edges of the absorber in order to prevent excretion from leaking from the leg openings. However, it is difficult to prevent a large amount of excrement from leaking due to long-time use or the like.

[0005] Absorbent articles such as those described in JP-A-63-21901, JP-A-2-174845, JP-A-2-71521 and JP-A-3-218752 have a leg opening. To prevent excretion from leaking from the part, a double-structured solid gather is formed, but since most of the solid gathers are formed by multiple sheets, the configuration and processing steps are complicated. It is difficult to produce at high speed, and it is difficult to provide inexpensive articles. Accordingly, an object of the present invention is to provide an absorbent article which overcomes the problems of the above-mentioned conventional absorbent articles, has an excellent effect of preventing excretion from leaking from leg openings, and can be manufactured efficiently. Is what you do.

[0006]

SUMMARY OF THE INVENTION The present invention provides a liquid-permeable topsheet, a liquid-impermeable backsheet, a rectangular absorber disposed between the two sheets, and an outer side extending from both side edges of the absorber. An absorbent article having a side flap extending to the side flap, wherein the side flap is folded back on the top sheet, and a stretchable elastic member is disposed on a longitudinal side edge and a folding line of the folded back portion. In addition, both ends in the longitudinal direction of the folded portion are adhesively fixed to the top sheet on the absorber, and a portion corresponding to the crotch region is a free edge, and further folded back with a side edge on which the elastic member is disposed. The portion between the side flap and the folded line is adhered and fixed to the top sheet along the longitudinal direction of the absorbent article, so that in the crotch region at the time of wearing. It relates to an absorbent article, wherein the double standing gathers erected upward wearing fixed part as a base end portion is formed.

Further, according to the present invention, the side flap includes:
The present invention relates to an absorbent article, wherein the backsheet is formed by extending outward from both side edges of an absorber.

Further, according to the present invention, the side flaps
The present invention relates to an absorbent article characterized by being formed of a sheet separate from a top sheet and a back sheet extending from both side edges of an absorber.

Further, the double solid gather formed by folding the side flap of the present invention relates to an absorbent article characterized in that a draft rate of an outer gather is equal to or greater than a draft rate of an inner gather.

Further, the present invention provides the above-mentioned absorbent article,
It consists of an exterior sheet that surrounds the waist circumference from the wearer's belly and holds the absorbent article against the wearer, and the absorbent article is arranged in a central region along the longitudinal direction of the exterior sheet,
A pants-type disposable diaper having a waist opening and a pair of leg openings formed by joining both side edges of a front body and a back body of the exterior sheet, and having elastic members attached along these openings. About.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An absorbent article according to the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, a rectangular absorber disposed between these two sheets, It is basically composed of side flaps extending outward from both side edges, and side flaps extending outward from both side edges of the rectangular absorber are folded back on the top sheet,
A stretchable elastic member is disposed on a longitudinal side edge and a folding line of the folded portion, and both longitudinal ends of the folded portion of the side flap are adhesively fixed to a top sheet on the absorber, and the inseam A portion corresponding to the region is a free edge, and a portion between the side edge where the elastic member is arranged and the folding line is adhesively fixed to the top sheet along the longitudinal direction of the absorber. I have.

In the absorbent article according to the present invention having such a configuration, the free edge and the folding line on which the elastic member is arranged with the adhesively fixed portion of the side flap as the base end in the crotch region when worn are upward. In this case, a double solid gather is formed to stand up, so that it has an excellent effect of preventing leakage. Furthermore, since the manufacturing method of the absorbent article having such a configuration is simple, it can be manufactured more efficiently than the conventional manufacturing method of the absorbent article having double three-dimensional gathers.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments. FIG. 1 is a perspective view showing a state in which an absorbent article 1 according to an embodiment of the present invention is developed. The absorbent article 1 of FIG. 1 includes a top sheet 2, a back sheet 3, a rectangular absorber 4, and side flaps 5 extending outward from both side edges of the absorber and folded over the top sheet 2. Both ends in the longitudinal direction of the folded portion of the side flap 5 are adhesively fixed to the wide portion of the rectangular absorber 4, and the central region rises upward to form double solid gathers 16 and 1.
7 are formed. Here, gather 1 located on the outside
The draft rate of No. 6 is the same as or higher than the draft rate of the gather 17 located on the inside, and more specifically, 200 to 4 on the outside.
00%, preferably 250-350%, 150- inside
It is 350%, preferably 200-300%, but the draft rate on the inside does not exceed the draft rate on the outside. The draft rate is the length (a) of the stretched elastic body in the relaxed state.
And the length (b) at the time of extension (b / a × 100%)
It is.

FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1, that is, a narrow section corresponding to the central portion along the width direction of the rectangular absorber 4, and FIG. FIG. 3B is a cross-sectional view taken along a cutting line B ′, that is, a wide portion of the rectangular absorber 4. FIG.
As shown in the figure, at the central portion along the width direction of the absorber 4, the side flaps 5 are adhered and fixed to the back sheet 3 with an adhesive 9, and extend outward from both longitudinal edges of the absorber 4 so as to extend outward. It is folded up. In addition, along the side edge of the absorber 4, the stretchable elastic member 7 is arranged in an extended state on the folded line 14 and the side edge 15 of the side flap 5, and the folded line 14 and the side edge on which the stretchable elastic member 7 is arranged. 1
5 is adhered and fixed to the top sheet 2 along the side edge of the absorber 4, which serves as a base end 8, and the free edge 6 of the flap on which the elastic member 7 is disposed is connected to the base end. 8
, And double solid gathers 16 and 17 are formed. Further, as shown in FIG. 3, a side edge 15 of the folded longitudinal end of the side flap 5 is adhesively fixed to the top sheet 2.

FIG. 4 is a cross-sectional view taken along the line AA ′ of FIG. 1 showing another embodiment of the absorbent article of the present invention, which is different from FIG. In FIG. 4, the back sheet 3 is extended outward from both side edges of the absorber 4 to form side flaps, and the stretchable elastic members 7 are arranged in the same manner as described in FIG.
Double solid gathers 16 and 17 are formed.

FIG. 5 is a perspective view of the pants-type diaper 10 formed by arranging the absorbent article 1 of the present invention in the central region along the longitudinal direction of the outer sheet 11 in a state where the adhesive portions at the front and rear sides of the pants-type diaper 10 are opened and opened. is there. Here, the absorbent article 1 is arranged in a central region along the longitudinal direction of the exterior sheet 11 in which the leg-elastic elastic member 12 and the waist-elastic member 13 are arranged, and the front body and the rear body are bonded and closed in advance. It is held so as to surround the waist from the wearer's belly. In the above embodiment, the double solid gathers 16 and 17 are gathers 17 located inside the absorbent article and gathers 1 located outside.
6, the height is not necessarily required to be the same, and the height of the gather 17 located on the inside may be higher than that of the gather 16 located on the outside, or the height of the gather 17 located on the inside may be increased. The gather 17 to be formed may be lower than the gather 16 located outside.

The top sheet 2 used in the present invention
Uses a liquid-permeable nonwoven fabric made of polyethylene, polypropylene or other thermoplastic fibers. Further, the back sheet 3 is a liquid-impermeable polyethylene sheet when the absorbent article is used alone, preferably a moisture-permeable liquid-impermeable sheet stretched by adding a filler to a thermoplastic resin, or Furthermore, since the texture such as touch is excellent, at least one surface of the liquid impermeable sheet, a card made of polypropylene, polyester, polyethylene, or the like, a composite sheet obtained by laminating or laminating a nonwoven fabric such as spun bond, etc. It is appropriate to use

Further, the absorbent article is held by the wearer with an exterior sheet surrounding the waist from the belly of the wearer. For example, as shown in FIG. 5, both sides of the front body and the back body are adhesively closed. When the back sheet 3 is used as an inner pad of a pants-type diaper, a nonwoven fabric made of polyethylene, polypropylene, or other thermoplastic fibers subjected to a water-repellent treatment or the like may be used.

The absorber 4 is preferably a mixture of fluff pulp and a high-absorbency polymer in combination with a high-absorbency polymer, and may be a single absorbent paper or a mixture or a laminate of heat-fused fibers. Further, it is preferable to adopt a structure in which the whole is wrapped in a tissue. Absorber 4 is gather 1 located on the outside
6, which are wrapped by the side flaps 5 forming the inner flaps 17.
Excrement that has surpassed the above can be absorbed, which has a further effect in preventing leakage.

When the back sheet 3 is formed by extending the back sheet 3 outward from both side edges of the absorber, the side flap 5 is made of a material similar to the material of the back sheet to be used. When formed as a separate sheet, such as a liquid-impermeable polyethylene sheet or a polyethylene sheet provided with air permeability by giving micropores, or
A sheet provided with moisture permeability such as a moisture-permeable liquid-impermeable sheet which is stretched by adding a filler to a thermoplastic resin, and furthermore has an excellent texture such as touch, so that at least one side of the liquid-impermeable sheet Further, a composite sheet obtained by laminating or laminating a nonwoven fabric such as a card made of polypropylene, polyester, polyethylene, or the like, or a spun bond or the like can be used. In addition, when a nonwoven fabric made of polyethylene, polypropylene, or another thermoplastic fiber subjected to water repellent treatment or the like is used, a good feeling such as a touch can be obtained and high air permeability can be obtained, which is also effective in preventing stuffiness.

The elastic member 7 provided on the side flap 5, the elastic member 12 around the leg and the elastic member 13 around the waist constituting the pants-type diaper 10 are made of a urethane film, urethane thread, urethane foam, thread. Stretchable elastic members used for ordinary absorbent articles such as rubber can be used as they are, and these stretchable elastic members are bonded and fixed in a stretched state by a hot melt adhesive.

Further, as a bonding method for forming the base end portion 8, hot melt bonding, pressure welding, ultrasonic melting and the like can be used alone or in combination. When the front and rear sides of the pants-type diaper 10 are adhesively closed, the state in which both side edges protrude outward, the state in which both side edges protrude inward, or one side edge is outward. With the other side edge protruding inward, hot melt adhesive, pressure welding, ultrasonic melting, etc. are joined alone or in combination along the outermost sides of both sides.

At least the absorbent article 1 of the exterior sheet 11
The central region in the longitudinal direction in which is disposed is a liquid-impermeable polyethylene sheet, preferably a sheet provided with moisture permeability such as a liquid-impermeable sheet having a moisture-permeable property obtained by adding a filler to a thermoplastic resin. It is preferable that the portion other than the portion where the absorbent article 1 is disposed has at least two layers for disposing the leg-elastic elastic member 12 therebetween, and suppresses a rise in humidity due to sweating and excrement of the wearer, Polyethylene, a nonwoven fabric made of thermoplastic fiber such as polypropylene, or a polyethylene sheet provided with air permeability by providing micropores, and further stretched by adding a filler to the thermoplastic resin to prevent rash that can occur from stuffiness and stuffiness It is preferable to use a moisture-permeable sheet, and to use a nonwoven fabric at least for the inner part directly touching the wearer.

In order to further improve the fit of the diaper to the wearer, a plurality of outer sheets 11 are provided at least partially in the width direction of the front and back sides of the wearer around the waist of the wearer. An elastic member may be provided. More preferably, at least a sheet used for a portion other than the portion where the absorbent article 1 is arranged has a thickness of 5 to 40 μm.
Polyester fiber such as polyethylene terephthalate fiber on at least one surface of a polyurethane-based film having a thickness of moisture permeability and elasticity, a natural rubber sheet, and a foam sheet, on at least one surface of an elastomer nonwoven web alone or an elastomer nonwoven web, Hydro-entangled or laminated webs of fiber layers made from materials selected from the group including polyolefin fibers, polyamide fibers such as nylon fibers, cellulose fibers such as cotton fibers, pulp fibers and mixtures thereof. By using a combination thereof or a laminate obtained by laminating a moisture-permeable and stretchable thermoplastic resin such as a polyurethane-based or polyolefin-based resin on the fiber layer, it is possible to prevent stuffiness as well as the fit.

In the above embodiment, a three-dimensional pants-type disposable diaper is shown in advance. However, the front and rear sides of the exterior sheet 11 are not bonded and closed, and the width direction of the front or rear diaper is not changed. A fastening means may be provided on both sides, and the front and rear bodies of the diaper may be bonded and fixed by the fastening means when the diaper is used.

[0026]

As described above, in the absorbent article of the present invention,
In the crotch region when worn, the free edge where the elastic member is arranged and the folding line are erected upward with the adhesively fixed portion of the side flap as the base end, thereby forming a double solid gather, thereby preventing leakage. It is possible to provide an absorbent article having excellent effects. In addition, in the absorbent article having such a configuration according to the present invention, since the manufacturing method is simple, compared to the conventional method of manufacturing an absorbent article having double three-dimensional gathers, an absorbent article that is manufactured more efficiently can be obtained. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which an absorbent article of the present invention is developed.

FIG. 2 is a cross-sectional view taken along line A-A ′ of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B ′ of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line AA ′ of FIG. 1 showing another example of the absorbent article of the present invention, which is different from FIG.

FIG. 5 is a perspective view in which an adhesive part of a front body and a back body of a pants-type diaper formed by arranging the absorbent article of the present invention in a central region along a longitudinal direction of an exterior sheet is opened and developed.

[Explanation of symbols]

 1: Absorbent article 2: Top sheet 3: Back sheet 4: Absorber 5: Side flap 6: Free edge 7: Elastic elastic member 8: Base end 9: Adhesive 10: Pants type diaper 11: Exterior sheet 12: Elastic elastic member around the leg 13: Elastic elastic member around the waist 14: Folding line of the side flap 15: Side edge of the folded side flap 16: Three-dimensional gather located outside 17: Three-dimensional gather located inside

Claims (5)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, a rectangular absorber disposed between the two sheets, and side flaps extending outward from both side edges of the absorber. The side flap is folded back on the top sheet, and a stretchable elastic member is arranged on a longitudinal side edge and a folding line of the folded portion, and a longitudinal portion of the folded portion is provided. Both ends in the direction are adhesively fixed to the top sheet on the absorber and a portion corresponding to the crotch region is a free edge, and furthermore, a portion between the side edge where the elastic member is arranged and the folding line is Along the longitudinal direction of the absorbent article, it is adhesively fixed to the top sheet, so that, in the crotch region at the time of wearing, the adhesively fixed portion between the side edge of the side flap and the folded line is a proximal end. Absorbent article characterized in that the double standing gathers erected upward is formed as a. 2. The absorbent article according to claim 1, wherein the side flaps are formed by extending the back sheet outward from both side edges of the absorber. 3. The absorbent article according to claim 1, wherein the side flap is formed of a sheet separate from a top sheet and a back sheet extending from both side edges of the absorber. 4. A double solid gather formed by folding back the side flaps, wherein a draft rate of an outer gather is equal to or greater than a draft rate of an inner gather. Absorbent articles. 5. An absorbent article according to any one of claims 1 to 4, comprising an outer sheet surrounding the waist from the belly of the wearer and holding the absorbent article against the wearer. ,
The absorbent article is arranged in a central region along the longitudinal direction of the exterior sheet, and joins both side edges of a front body and a rear body of the exterior sheet to form a waist opening and a pair of leg openings. A pants-type disposable diaper to which elastic members are attached along these openings.