JPH11285509A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article which prevents leakage and can be manufactured efficiently. SOLUTION: A top sheet and a back sheet are constituted of one sheet and an absorber 5 is arranged in the state of being wrapped by this one sheet. The top sheet part 3 of the one sheet is folded such as wrapping an extensible elastic body 8 in an extended state to the inside in areas positioned at both side ends of the longitudinal direction of an absorber main body so as to form a stereoscopic gather 6. In addition, the back sheet part 4 on the lower face of the absorber is constituted in the state of wrapping the side edges of the absorber 5 and both of the right and left back sheet parts are adhere-fixed to stand the gather 6 upward.

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 Absorbent articles have a structure in which an absorbent made of a hydrophilic sheet cotton-like pulp, a high-absorbent polymer substance, or the like is disposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. 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 order to solve these problems, it has been proposed to arrange a flap outside the absorber. That is, as described in Japanese Patent Publication No. Hei 6-93901, a flap having a side flap containing a stretchable elastic member and functioning as a leak-proof portion includes a stretchable elastic member, and is set inside the diaper by falling down. There is known a diaper in which a pocket is formed between the absorbent body and a top sheet on the absorbent body to prevent leakage.

In addition, a three-dimensional gather is provided along the longitudinal side edge of the absorber at a position between the gather around the leg and the absorber or on the absorber, and stands upright toward the wearer's body. Pants-type disposable diapers in which the three-dimensional gathers are composed of a sheet separate from a top sheet and a back sheet are disclosed in JP-A-3-280951 and JP-A-5-184622. I have. In addition, the width direction of the absorber is wrapped with a top sheet member configured by joining the central nonwoven fabric and the water-repellent side nonwoven fabrics on both sides,
A diaper in which two three-dimensional cuffs are formed by the water-repellent side nonwoven fabric portion is disclosed in Japanese Patent Application Laid-Open No. 6-296638.

[0005]

The above-mentioned Japanese Patent Publication No. Hei 6-93.
The diaper described in Japanese Patent Publication No. 901 has a leak-proof wall against urine and loose stool because the flap simply falls down on the inside of the absorber and the flap does not stand on the absorber side when worn. May not be able to fulfill their role. In addition, even if it is standing, it is slightly inclined inward and stands up, so the capacity of the pocket part is reduced, and when some urine is excreted, it is not possible to temporarily secure urine, It will leak out of the diaper. In addition, when the flap width is increased to increase the capacity, the area where the flap covers the absorber increases, and there is a problem that the absorption region becomes extremely narrow.

Further, the pants-type disposable diaper disclosed in the above-mentioned JP-A-3-280951 and JP-A-6-63074 is provided with a top sheet in order to prevent leakage of excrement from leg openings. The three-dimensional gather is formed by a sheet separate from the back sheet, but the elongate band-shaped sheet on which the elastic member constituting the approximately three-dimensional gather is stretched is substantially perpendicular to the elastic member provided at the waist opening. In addition, arranging the diapers on the side edges in the longitudinal direction over the entire length of the absorber complicates the diaper processing step and the configuration of the diaper, making it difficult to perform high-speed production. Also, Japanese Patent Application Laid-Open No. 6-29663
Also in the case of the diaper described in Japanese Patent Publication No. 8, the diaper processing is performed because the top sheet member is composed of three materials of the center and both sides, and further, two three-dimensional cuffs are formed on both side portions of the top sheet. The process and the configuration of the diaper are complicated, and it is difficult to provide an inexpensive diaper in terms of the material. An object of the present invention is to overcome the problems of the conventional disposable diapers and efficiently manufacture and provide an inexpensive disposable diaper that does not leak excrement.

[0007]

SUMMARY OF THE INVENTION The present invention provides a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber body comprising an absorber disposed between these two sheets, and an absorber body. In an absorbent article having a pair of three-dimensional gathers arranged on both side edges along a longitudinal direction, a top sheet and a back sheet of the absorber main body are formed by one sheet, and the absorber is wrapped in this sheet. The three-dimensional gathers are arranged so that the top sheet portion of the one sheet wraps the stretchable elastic body in an extended state in a region located on both longitudinal side edges of the absorber body. The present invention relates to an absorbent article characterized by being formed by bending.

[0008] The present invention also relates to an absorbent article, wherein the one sheet is made of a water-repellent sheet, and the top sheet is subjected to a hydrophilic treatment.

[0009] The present invention also relates to an absorbent article, wherein the one sheet is made of a hydrophilic sheet, and a back sheet portion is subjected to a water-repellent treatment.

Further, the present invention comprises the above-mentioned absorbent article, and an exterior sheet for holding the absorbent article against the wearer by surrounding the waist from the abdomen to the waist, wherein the absorbent article has a longitudinal length of the exterior sheet. It is arranged in the central region along the direction, and the both sides of the front body and the back body of the exterior sheet are joined to form a waist opening and a pair of leg openings, and stretch elasticity along these openings The present invention relates to a disposable diaper to which a member is attached.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent article of the present invention having the above-mentioned structure, an efficient and inexpensive absorbent article can be manufactured by wrapping the absorbent body in one sheet.
Further, a top sheet portion of one sheet is bent so as to wrap the stretchable elastic body in an extended state in the region located on both longitudinal side edges of the absorber main body to form three-dimensional gathers, The backsheet part of the lower surface of the absorber is configured so as to wrap the side edges, and the left and right backsheet parts are adhesively fixed, so that the three-dimensional gathers can easily rise up and have a structure that is excellent in leak prevention. .

[0012]

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 shows an absorbent article 1 of the present invention.
It is a perspective view which shows the state which expanded. The absorbent article 1 shown in FIG. 1 includes a top sheet portion 3 made of a sheet 2, a back sheet portion 4, and an absorber 5 disposed between the two sheet portions.
The three-dimensional gathers 6 are formed by folding the top sheet portion 3 inward in regions located at both longitudinal side edges of the absorber 5, and both longitudinal ends of the folded portion are formed on the top of the absorber 5. It is adhesively fixed to the sheet portion 3.

FIG. 2 is a cross-sectional view of the absorbent article of FIG. 1 taken along the line AA ', that is, a portion corresponding to a central portion of the absorbent body 5 along the width direction, and FIG. B of the sexual article
FIG. 6 shows a cross-sectional view taken along the line B ′. As shown in FIG. 2, the absorber 5 is arranged so as to be wrapped in the sheet 2 forming the top sheet portion 3 and the back sheet portion 4, and three-dimensional gathers 6 are formed on both side edges of the absorber 5. The back sheet portion 4 is formed by overlapping the side edges of the sheet 2 with the top sheet portion 3, and is adhered and fixed to the lower surface of the absorber 5. Also, the return line 7 of the three-dimensional gather 6
Is provided with an elastic member 8 in an extended state. Further, as shown in FIG. 3, the folded longitudinal end of the three-dimensional gather 6 has its edge 9 adhered and fixed to the top sheet 2.

FIG. 4 is a perspective view of the pants-type diaper 11 formed by arranging the absorbent article 1 of the present invention in the central region along the longitudinal direction of the exterior sheet 10 in a state where the adhesive portions of the front body and the back body are opened and developed. is there. In FIG. 4, the absorbent article 1 includes a leg-elastic elastic member 12 and a waist-elastic elastic member 13.
Are arranged in a central region along the longitudinal direction of the exterior sheet 10 on which the front body and the rear body are adhered and closed in advance, and are held so as to surround the wearer's belly and waist. In the above embodiment, the three-dimensional gathers 6 are tilted inward. However, it is not always necessary to tilt the gathers inward.
It does not have to be adhesively fixed.

The sheet 2 used in the present invention includes a non-woven fabric, a woven fabric, a porous plastic film made of polyethylene, polypropylene, and other thermoplastic fibers.
A porous foam, a reticulated foam or the like is used. Also,
Natural fibers (eg, wood fibers, flocculent fibers, etc.) may be used, and can be manufactured from a wide range of materials, such as a combination of synthetic fibers and natural fibers. Sheet 2 has a basis weight of 8 to 60 g /
m ² and the thickness are preferably 0.03 to 5 mm.
In any case, since the top sheet portion 3 is a portion that comes into direct contact with the skin, any material may be used as long as it is soft and comfortable. When the sheet 2 is water-repellent, the top sheet portion 3 is subjected to a hydrophilic treatment. Examples of the hydrophilizing agent include anionic surfactants such as carboxylate, sulfate, sulfonate and phosphate,
Cationic surfactants such as fatty acid amine salts and quaternary ammonium salts, amino acid-type amphoteric surfactants, betaine-type amphoteric surfactants, polyethylene glycol-type nonionic surfactants, and polyhydric alcohol-type nonionic surfactants It is preferable to use a nonionic surfactant and to hydrophilize the topsheet with a single or a mixture of these. As the hydrophilic treatment method, a conventionally known treatment method such as an impregnation method, a gravure coating method, a foam coating method, and a spray method can be used. When the sheet 2 is hydrophilic, the three-dimensional gathers 6 and the back sheet portion 4 are subjected to a water-repellent treatment. Examples of the water repellent include paraffin-based, pyridinium salt-based water-repellents, methylolamide-type, ethyleneurea-type, silicone-type, chromic chloride-type, and fluorine compound-type, and are not particularly limited. As the water repellent treatment method, a conventionally known treatment applying method can be used in the same manner as in the case of the hydrophilic treatment. In any case, the back sheet portion 4 only needs to have a leak-proof property, as long as the moisture in the absorbent does not exude to the outside of the diaper.

The absorber 5 is preferably made of fluff pulp containing waste paper as the main material and used in combination with a high-absorbency polymer. In addition, an absorbent paper alone, or a mixture or laminate of heat-fused fibers is used. Further, it is preferable to adopt a laminated structure in which the whole is wrapped in tissue. The shape of the absorber 5 may be an hourglass type, a rectangular shape, or the like, but the hourglass type provides better fit.

In addition to the three-dimensional gather elastic member 8 arranged at the tip of the three-dimensional gather 6, the leg elastic member 1
2. As the elastic member 13 around the waist, it is possible to use, as it is, an elastic member used for ordinary disposable diapers, such as urethane film, urethane thread, urethane foam, and thread rubber. In an extended state, it is arranged in the three-dimensional gather portion, the leg opening, and the waist opening, and is adhered and fixed with a hot melt adhesive.

At least the absorbent article 1 of the exterior sheet 10
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 in order to sandwich and dispose the elastic member 12 around the leg, so that the temperature rise due to sweating and excretion of the wearer is suppressed, and Polyethylene, a nonwoven fabric made of thermoplastic fiber such as polypropylene, or a polyethylene sheet provided with air permeability by providing micropores to prevent rash that may occur from stuffiness, and furthermore, a ventilation stretched by adding a filler to a thermoplastic resin. It is preferable that a non-woven fabric is used at least for the inner portion that directly contacts the wearer using a sheet having a property.

In order to further improve the fit of the diaper to the wearer, a plurality of outer sheets 10 are provided at least partially in the width direction around the waist of the wearer on the front and back sides of the wearer. May be arranged. More preferably, at least 5 to 40 sheets are used in a portion other than the portion where the absorbent article 1 is arranged.
Polyester fiber such as polyethylene terephthalate fiber on at least one surface of a polyurethane-based film, natural rubber sheet or foam sheet having a thickness of μm and having moisture permeability and elasticity, at least one surface of an elastomer nonwoven web or at least one surface of an elastomer nonwoven web , Polyolefin fiber,
A hydroentangled or laminated web of fiber layers made of a material selected from the group including polyamide fibers such as nylon fibers, cellulose fibers such as cotton fibers, pulp fibers, and mixtures thereof is used. When a thermoplastic resin having moisture permeability and elasticity such as polyurethane or polyolefin, which is laminated on the fiber layer, is used, it is possible to prevent stuffiness as well as the fit.

The exterior sheet 10 and the absorbent article 1 are adhered by a hot melt adhesive. The method of applying the hot melt adhesive is not particularly limited as long as it is a commonly used method such as a bead, a spiral, and a melt blow.However, in order to obtain a good texture of the sheet after bonding,
It is desirable that the amount of the adhesive used is as small as possible and that the adhesive is applied uniformly over the entire application surface, and application by melt blow is preferred. The melt-blown bonding is used everywhere in the diaper manufacturing process.

In the above embodiment, a three-dimensional pants-type disposable diaper is shown in advance. However, the front and rear sides of the outer sheet 10 are not bonded and closed, and the width of the front or rear diaper is not changed. A fastening means may be provided on both sides in the direction, and the front and rear bodies of the diaper may be bonded and fixed by the fastening means when the diaper is used.

[0022]

As described above, in the absorbent article of the present invention,
Since the top sheet and the back sheet of the absorbent article main body are formed of one sheet, and the absorber is arranged in a state of being wrapped in this one sheet, it is possible to efficiently manufacture the absorbent article. In addition, since the portion where the sheets are overlapped is only the back sheet portion, an inexpensive absorbent article can be provided. Further, the top sheet portion of the one sheet is bent so as to wrap the stretchable elastic body in an extended state in a region located on both longitudinal side edges of the absorber main body to form a three-dimensional gather, and further, the absorber is formed. The back sheet part of the lower surface of the absorber is formed so as to wrap the side edge of the body, and the left and right back sheet parts are adhered and fixed, so that the three-dimensional gathers can easily rise up and provide an absorbent article excellent in leak prevention. It is possible to do.

[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 perspective view in which an adhesive portion between 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: Sheet 3: Top sheet portion 4: Back sheet portion 5: Absorber 6: Solid gather 7: Folding line 8: Elastic elastic member 9: Edge of solid gather 10: Exterior sheet 11: Pants type Diaper 12: Elastic elastic member around the leg 13: Elastic elastic member around the waist

Claims (4)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber body comprising an absorber disposed between the two sheets, and two side edges along the longitudinal direction of the absorber body. In the absorbent article having a pair of three-dimensional gathers arranged, a top sheet and a back sheet of the absorber main body are formed of one sheet, and the absorber is arranged in a state of being wrapped in the sheet, The three-dimensional gathers are formed by bending the top sheet portion of the one sheet so as to wrap the stretchable elastic body in an extended state in a region located on both longitudinal side edges of the absorber main body. An absorbent article characterized by the following. 2. The absorbent article according to claim 1, wherein said one sheet is made of a water-repellent sheet, and a top sheet portion is subjected to a hydrophilic treatment. 3. The absorbent article according to claim 1, wherein said one sheet is made of a hydrophilic sheet, and a back sheet portion is subjected to a water-repellent treatment. 4. An absorbent article according to any one of claims 1 to 3, 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 disposed 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 disposable diaper to which elastic members are attached along these openings.