JP6723046B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article, and more particularly, to an absorbent article including an inner absorbent body that urges a wearer to replace the absorbent article.

Conventionally, in order to three-dimensionalize an absorbent body that absorbs excrement into a three-dimensional shape of a wearer, a high absorption component that extends in the front-back direction at a predetermined interval in the width direction on a sheet-shaped base material is used. When the excretion of the wearer is performed, the strips that do not have the high absorption component are bent and the sheet shape becomes three-dimensional when the excretion of the wearer is performed. Means have been proposed. (Patent Document 1)

A means for providing mutually movable particulate elements extending in the front-rear direction at the center of the inner surface of the absorbent body in the width direction in order to prevent leakage of excrement to the outside without impairing the feeling of wearing. Is proposed. (Patent Document 2)

JP, 2003-70843, A International publication WO2004/000188

However, in the means of Patent Document 1, since the three-dimensional absorbent body that absorbs excrement is continuous in the front-rear direction, the three-dimensional absorbent body cannot be positioned at a sensitive part of the wearer, and the three-dimensional absorbent body is worn. There is a possibility that the person cannot be surely urged when to replace the absorbent article.

Further, in the means of Patent Document 2, the particulate element portions provided on the inner surface of the absorber move relative to each other based on the body shape of the wearer so that the absorber fits the wearer. When absorbed, it may swell toward the wearer and may not be able to apply a predetermined pressure to the wearer, and the wearer may not be surely urged to replace the absorbent article.

Therefore, the main problem of the present invention is to provide an inner absorbent body that swells toward the wearer when absorbing excrement on the inner surface of the absorbent body corresponding to the sensitive part of the wearer, and An object of the present invention is to provide an absorbent article that can surely bring out the replacement time.

MEANS TO SOLVE THE PROBLEM This invention which solved the said subject is as follows.
The invention according to claim 1 is provided with a liquid-permeable topsheet provided on the body side, a liquid-impermeable backsheet provided on the non-body side, and provided between the topsheet and the backsheet. In an absorbent article provided with an absorber that absorbs excrement,
An inner absorber extending in the front-rear direction is provided at a portion of the inner surface on the body surface side of the absorber that faces the buttocks of the wearer, and a width is formed at both end portions in the front-rear direction of the inner surface on the body surface side of the absorber. The inner absorbent body extending in the direction is provided, and the basis weight of the superabsorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction is more than that of the superabsorbent resin of the absorbent body. In many cases, the first sheet is provided with a first slit extending in the front-rear direction at a portion of the top sheet facing the inner absorber extending in the front-rear direction in a plan view.

The invention according to claim 2 is the absorbent article according to claim 1, wherein an inner absorbent body extending in the front-rear direction is provided on a portion of the inner surface of the absorbent body facing the pubic area of the wearer from the buttocks of the wearer. is there.

In the invention according to claim 3, the basis weight of the superabsorbent resin of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction is 600 to 1200 g/m ² , and the front-rear direction is extended. The absorbent article according to claim 1 or 2, wherein the swelling height of the inner absorbent body is 15 to 30 mm when the superabsorbent resin of the existing inner absorbent body and the inner absorbent body extending in the width direction is swollen. is there.

The invention according to claim 4 is the absorbent article according to any one of claims 1 to 3, wherein the tip portion of the first slit is formed in a zigzag shape.

The invention according to claim 5 is the absorbent article according to any one of claims 1 to 4, wherein a second slit that intersects the first slit at a right angle and extends in the width direction is provided.

The invention according to claim 6 is provided with a liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the opposite body side, and provided between the top sheet and the back sheet. In an absorbent article provided with an absorber that absorbs excrement,
An inner absorber extending in the front-rear direction is provided at a portion of the inner surface on the body surface side of the absorber that faces the buttocks of the wearer, and a width is formed at both end portions in the front-rear direction of the inner surface on the body surface side of the absorber. The inner absorbent body extending in the direction is provided, and the basis weight of the superabsorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction is more than that of the superabsorbent resin of the absorbent body. The absorbent article is characterized in that, in plan view, folded portions extending in the front-rear direction are provided at portions of the top sheet that face both sides in the width direction of the inner absorber extending in the front-rear direction in a plan view. Is.

The invention according to claim 7 is the absorbent article according to claim 6, wherein an inner absorbent body is provided on a portion of the inner surface of the absorbent body facing the body surface from the buttocks of the wearer.

In the invention according to claim 8, the basis weight of the superabsorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction is 600 to 1200 g/m ² , and the front absorbent body extends in the front-rear direction. The absorbent article according to claim 6 or 7, wherein the swelling height of the inner absorbent body is 15 to 30 mm when the superabsorbent resin of the existing inner absorbent body and the inner absorbent body extending in the width direction is swollen. is there.

According to the invention of claim 1, an inner absorbent body extending in the front-rear direction is provided at a portion of the inner surface of the absorbent body facing the wearer's buttocks, and an inner surface of the absorbent body on the body surface side. The inner absorbers extending in the width direction are provided at both ends in the front-rear direction, and the weight of the water-absorbent resin is set to be higher than that of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction. Since the first slit extending in the front-rear direction is provided in a portion facing the inner absorber extending in the front-back direction in the top sheet in a plan view, the first slit extending in the front-rear direction is provided more than the basis weight of the water-absorbent resin. When absorbed, it swells toward the wearer's buttocks and presses against the wearer's buttocks, prompting the wearer to replace the absorbent article. In addition, the inner absorbent body extending in the width direction swells toward a wide range of the wearer's body, so that the wearer can be more reminded that it is time to replace the absorbent article.

According to the invention of claim 2, in addition to the effect of the invention of claim 1 , the inner absorption extending in the front-rear direction from the wearer's buttocks on the inner surface on the body surface side of the absorber to the part facing the pubic area. Since the body is provided, when the inner absorbent body absorbs excretion, it swells from the wearer's buttocks toward the pubic area and presses the wearer's buttocks to the pubic area to replace the absorbent article with the wearer. Can be more aroused.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the basis weight of the superabsorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction. Is 600 to 1200 g/m ² , and when the super absorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction swells, the swelling height of the inner absorbent body is 15 to Since the length is 30 mm, it is possible to give the wearer a feeling of discomfort during excretion and surely urge the wearer to replace the absorbent article.

According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, since the tip portion of the first slit is formed in a zigzag shape, a feeling of pressure by the inner absorber is provided. Not only that, but also the feeling of contact by the first slit is added, so that the wearer can be further prompted to exchange the absorbent article.

According to invention of Claim 5, in addition to the effect by invention of any one of Claims 1-4, the 2nd slit which crosses a 1st slit at right angle and extends in the width direction is provided. Therefore, not only the feeling of pressure due to the inner absorber but also the feeling of contact due to the intersection defined by the first slit and the second slit can be added to further urge the wearer to replace the absorbent article. The absorber can be swollen smoothly toward the wearer.

According to the invention of claim 6, an inner absorbent body extending in the front-rear direction is provided at a portion of the inner surface of the absorbent body facing the wearer's buttocks, and an inner surface of the absorbent body on the body surface side. The inner absorbers extending in the width direction are provided at both ends in the front-rear direction, and the weight of the water-absorbent resin is set to be higher than that of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction. More than the basis weight of the water-absorbent resin, in a portion facing the widthwise both sides of the inner absorber extending in the front-back direction in the top sheet in a plan view, since the folded portion extending in the front-back direction is provided, When the inner absorber absorbs excrement, it swells toward the wearer's buttocks and presses the wearer's buttocks, prompting the wearer to replace the absorbent article. In addition, the inner absorbent body extending in the width direction swells toward a wide range of the wearer's body, so that the wearer can be more reminded that it is time to replace the absorbent article.

According to the invention of claim 7, in addition to the effect according to the invention of claim 6, since the inner absorbent body is provided on the inner surface of the absorbent body on the body surface side, facing the pubic area from the buttocks of the wearer, When the inner absorbent body absorbs excrement, it swells from the wearer's buttocks toward the pubic area and presses the wearer's buttocks to the pubic area, which can further urge the wearer to replace the absorbent article. ..

According to the invention of claim 8, in addition to the effect of the invention of claim 6 or 7, the basis weight of the superabsorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction. Is 600 to 1200 g/m ² , and when the super absorbent resin of the inner absorbent body extending in the front-rear direction and the inner absorbent body extending in the width direction swells, the swelling height of the inner absorbent body is 15 to Since the length is 30 mm, it is possible to give the wearer a feeling of discomfort during excretion and surely urge the wearer to replace the absorbent article.

It is an inner surface top view which developed the tape type disposable diaper. It is an outer surface top view which expanded the tape type disposable diaper. FIG. 3 is a sectional view taken along line iii-iii of FIG. 1. 1. It is the iv-iv sectional view of FIG. 1. It is the vv sectional drawing of FIG. FIG. 3 is a plan view of the inner surface of the top sheet, the absorber provided with the inner absorber and the back sheet according to the first embodiment. It is an AA sectional view of Drawing 6, (a) shows an inside absorber before swelling, and (b) shows an inside absorber after swelling. It is explanatory drawing of the other slit formed in the top sheet. It is explanatory drawing of the further another slit formed in the top sheet. It is an inner surface top view of a topsheet of a 2nd embodiment, an absorber provided with an inside absorber, and a backsheet. FIG. 11 is a cross-sectional view taken along the line AA of FIG. 10, where (a) shows the inner absorbent body before swelling and (b) shows the inner absorbent body after swelling. FIG. 6 is a plan view of an inner surface in which inner absorbers are provided at both ends in the front-rear direction of the absorber. FIG. 3 is a plan view of an inner surface in which inner absorbers are provided at both ends in the width direction of the absorber.

<Tape type disposable diaper>
An absorbent article having an inner absorbent body that swells toward the wearer, which urges the wearer to replace the absorbent article, will be described with reference to the accompanying drawings. In the present specification, the "front-back direction" refers to the direction connecting the ventral side and the back side, the "width direction" refers to the direction orthogonal to the front-back direction, and the "up-down direction" refers to the wearing of a tape-type disposable diaper. In the state, it means a direction orthogonal to the waistline direction, "inner surface" means a body side surface of each member, and "outer surface" means an antibody side surface. Note that the fixing points fixed with an adhesive such as hot melt, which is necessary for the explanation, are shaded or dotted. Further, in the present specification, the tape-type disposable diaper is described as an example, but the present invention can be applied to absorbent articles such as pants-type disposable diapers and pads.

As shown in FIGS. 1 and 2, the tape-type disposable diaper 100 includes a liquid-permeable topsheet 1 on the body side, a liquid-impermeable backsheet 2 on the non-body side, a topsheet 1 and a backsheet 2. The absorbent body 3 is provided between them. An exterior sheet 20 is provided on the outer surface of the back sheet 2.

Outside the width direction of the absorbent body 3, three-dimensional gathers 30 around the legs are provided to prevent leakage of excrement to the outside, and a predetermined distance is provided outside the base of the three-dimensional gathers 30. Flat gathers 40 around the legs are provided to prevent the leakage of excrement to the outside.

A three-dimensional gather 50 for the back side is provided on the back side of the absorbent body 3 in the front-rear direction to prevent leakage of excrement to the outside. The base of the three-dimensional gather 50 prevents leakage of excrement to the outside. A flat gather 60 for the back side is provided.

End flaps EF in which the absorber 3 does not extend are provided outside the front and rear direction of the absorber 3, and side flaps SF in which the absorber 3 does not extend are provided outside the absorber 3 in the width direction. Each is provided.

Fastening tapes 70 extending outward are provided on the back side of the side flaps SF, and a fastening tape 70 is attached to the outer surface of the exterior sheet 20 on the abdominal side when the wearer wears the tape-type disposable diaper 100. A target sheet 90 that locks the tape 70 is provided.

(Top sheet)
The top sheet 1 extends outside the outer peripheral edge of the absorber 3, and the extended portion is fixed to the inner surface of the back sheet 2 via an adhesive such as hot melt.

As the top sheet 1, a perforated or non-perforated non-woven fabric, a perforated plastic sheet, or the like is used. As the material fibers constituting the non-woven fabric, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, amides, etc., regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. Further, as a method for processing the non-woven fabric, known methods such as a spunlace method, a spunbond method, an SMS method, a thermal bond method, a meltblown method, a needle punch method, an air through method and a point bond method can be used. The fiber basis weight of the nonwoven fabric used for the top sheet 1 is preferably 15 to 30 g/m ² , and the thickness is preferably 0.05 to 1 mm.

(Back sheet)
The back sheet 2 extends outside the outer peripheral edge of the absorber 3 and blocks the movement of excretion absorbed by the absorber 3 to the outside.

As the back sheet 2, in addition to a plastic film such as a polyethylene film, a sheet having moisture permeability without impairing water impermeability can be used from the viewpoint of preventing stuffiness. This water-impermeable/moisture-permeable sheet is a microporous sheet obtained by forming a sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching the sheet in uniaxial or biaxial directions. Can be used. The weight per unit area of the back sheet 2 is preferably 13 to 40 g/m ² , and the thickness is preferably 0.01 to 0.1 mm.

(Absorber)
As the absorbent body 3, a product obtained by stacking pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric as a base, and mixing and fixing a superabsorbent polymer as necessary can be used. .. The weight of pulp in the absorber 3 is preferably 100 to 500 g/m ² , and the thickness is preferably 1 to 15 mm. Moreover, the basis weight of the super absorbent polymer is preferably 0 to 300 g/m ² , and if the super absorbent resin content is too small, sufficient absorbent capacity cannot be provided, and if it is too large, the entanglement between pulp fibers disappears. It is easy for cracks and cracks to occur. Moreover, although the absorber 3 of the present embodiment is formed in an hourglass shape in a plan view, it may be formed in a rectangular shape or the like.

[Inner Absorber of First Embodiment]
Next, the form of the inner absorbent body 13 that prompts the wearer to replace the tape-type disposable diaper will be described.
As shown in FIG. 6, when the tape-type disposable diaper 100 is attached to the wearer, an inner absorber 13 extending in the front-rear direction is provided on the inner surface of the absorber 3 facing the buttocks of the wearer. There is. The inner absorbent body 13 has a larger amount of superabsorbent resin mixed in the pulp fibers than the absorbent body 3, and the basis weight of the superabsorbent resin is 600 to 1200 g/m ² . Further, a linear slit (“first slit” in the claims) 11 extending in the front-rear direction is formed in a portion of the top sheet 1 facing the inner absorber 13.

As shown in FIGS. 7A and 7B, when the excrement is absorbed by the absorbent body 3 and the inner absorbent body 13, the inner absorbent body 13 in which a larger amount of super absorbent resin is mixed than in the absorbent body 3. Greatly swells toward the wearer's buttocks and compresses the wearer's buttocks. As a result, the wearer can be reminded that it is time to replace the tape-type disposable diaper 100.

The wearer feels different depending on the wearer, but many wearers are sensitive to the buttocks and genitals, and if they feel pressure on the buttocks and genitals, they feel uncomfortable and wear the tape-type disposable diaper 100. It is preferable that the inner absorbent body 13 is provided at the buttocks, the genital area, and the part of the absorbent body 3 facing the buttock and the genital area of the wearer. In addition, it is preferable to adjust the basis weight of the super absorbent polymer so that the inner absorbent body 13 swells from the absorbent body 3 toward the wearer's buttocks to have a swelling height of 15 to 30 mm. It is preferable that the width of the body 13 is narrower in the width direction from the back side to the abdomen side in the front-rear direction.

As shown in FIG. 8, a linear zigzag slit 11 extending in the front-rear direction may be formed in a portion of the top sheet 1 facing the inner absorbent body 13. As shown in FIG. 7( b ), the tip of the slit 11 stands up toward the buttocks of the wearer as the inner absorbent body 13 swells, and the zigzag tip of the slit 11 is placed at the buttocks of the wearer. Abut. As a result, the buttocks of the wearer have a feeling of pressure due to the swelling of the inner absorbent body 13 and a feeling of contact of the zigzag-shaped tip of the slit 11 at the same time, and it is time for the wearer to replace the tape type disposable diaper 100. Can be more aroused.

As shown in FIG. 9, a linear slit 11 extending in the front-rear direction and a linear slit extending in the width direction intersecting the slit 11 at a right angle are provided in a portion of the top sheet 1 facing the inner absorbent body 13. The slit 12 (“second slit” in the claims) 12 may be formed. As a result, the inner absorbent body 13 that has absorbed the excrement can be more easily swollen toward the buttocks of the wearer without receiving resistance from the top sheet 11. Moreover, as shown in FIG. 7B, the intersection of the slit 11 and the slit 12 rises toward the wearer's buttocks along with the swelling of the inner absorbent body 13, and the slit 11 and the slits are formed on the wearer's buttocks. Twelve intersections abut. As a result, the buttocks of the wearer are simultaneously given a feeling of pressure due to the swelling of the inner absorbent body 13 and a feeling of abutment at the tip of the intersection of the slits 11 and 12 at the same time. It can be more aroused.

[Inner Absorber of Second Embodiment]
Next, the form of the inner absorbent body 13 that prompts the wearer to replace the tape-type disposable diaper will be described. The same members as those of the inner absorber of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 10, when the tape-type disposable diaper 100 is attached to the wearer, an inner absorber 13 extending in the front-rear direction is provided on the inner surface of the absorber 3 facing the buttocks of the wearer. There is. The inner absorbent body 13 has a larger amount of superabsorbent resin mixed in the pulp fibers than the absorbent body 3, and the basis weight of the superabsorbent resin is 600 to 1200 g/m ² . Further, the folded portions 15 are formed on both sides in the width direction of the top sheet 1 at a portion facing the inner absorber 13. As a result, the inner absorbent body 13 that has absorbed the excrement can be more easily swollen toward the buttocks of the wearer without receiving resistance from the top sheet 11.

As shown in FIGS. 11( a) and 11 (b ), when the excrement is absorbed by the absorbent body 3 and the inner absorbent body 13, the inner absorbent body 13 in which a larger amount of super absorbent resin is mixed than in the absorbent body 3. Greatly swells toward the wearer's buttocks and compresses the wearer's buttocks. Thereby, the wearer can be reminded that it is time to replace the tape-type disposable diaper 100, and the super absorbent resin mixed in the inner absorbent body 13 and the like can be prevented from adhering to the buttocks of the wearer. You can

Further, as shown in FIG. 12, the inner absorber 13 is provided by extending in the width direction at both ends in the front-back direction of the inner face of the absorber 3, or as shown in FIG. 13, the width of the inner face of the absorber 3 is increased. The inner absorbent body 13 can be provided by extending in the front-rear direction at both ends in the direction. As a result, the inner absorbent body 13, which has absorbed the excrement, swells toward a wide range of the wearer's body, further reminding the wearer that the tape-type disposable diaper 100 is about to be replaced, and absorbs the excrement. It is possible to prevent the body 3 from leaking to the outside.

(Exterior sheet)
The exterior sheet 20 covers the back sheet 2 and makes the outer surface of the tape-type disposable diaper 100 look and feel like a cloth. The exterior sheet 20 is preferably made of non-woven fabric. As the material fibers, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, polyamides, etc., regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. It can be manufactured by using a spun bond method, a thermal bond method, an air through method, a needle punch method, or the like. However, long-fiber non-woven fabrics such as spun-bonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are preferable because they are compatible with touch and strength.

The non-woven fabric may be used as a single sheet, or may be used by stacking a plurality of sheets. When using a plurality of sheets, it is preferable that the non-woven fabrics are fixed to each other via an adhesive such as hot melt. When a non-woven fabric is used, its fiber areal weight is preferably 10 to 50 g/m ² , and particularly preferably 15 to 30 g/m ² .

(Three-dimensional gathers for legs)
As shown in FIGS. 3 and 4, the base portion 31A of the gather sheet 31 forming the three-dimensional gathers 30 for the legs is provided with an outer portion in the width direction of the inner surface of the topsheet 1 and an outer portion in the width direction of the inner surface of the backsheet 2. Is fixed in the front-back direction. Further, both front and rear ends of the standing portion 31B of the gather sheet 31 are fixed to the outer side portion in the width direction of the inner surface of the top sheet 1 and the outer side portion in the width direction of the inner surface of the gather sheet 51 forming the three-dimensional gathers 50. An intermediate portion in the front-rear direction of the standing portion 31B of the gather sheet 31 is not fixed to the inner surface of the top sheet 1 and the inner surface of the gather sheet 51, but is separated. The upright portion 31B is provided with a plurality of elongated elastic stretchable members 32 extending in the front-rear direction at predetermined intervals in the width direction in a predetermined extended state. Thus, when the wearer wears the tape-type disposable diaper 100, the standing portion 31B is erected toward the wearer's crotch by the contracting force of the elastic stretchable member 32, and the tip of the standing portion 31B is worn. It is possible to prevent the excrement from leaking to the outside by pressing it against the crotch of the person.

As the gather sheet 31, a non-woven fabric such as a spunbonded non-woven fabric, a plastic film similar to that used for the back sheet 2, or a laminated sheet of these can be used, but in terms of feel to the skin, A non-woven fabric treated with water is preferable.

As the elastic elastic member 32, natural rubber or synthetic rubber formed in a thread shape, a string shape, a band shape, or the like, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, Commonly used materials such as styrene butadiene, silicon, polyester, etc. can be used. Moreover, the thickness of the elastic expansion/contraction member 32 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm in the case of natural rubber, particularly about 0.5 to 3 mm), and the expansion rate at the time of attachment. Is preferably about 150 to 350%, particularly preferably about 160 to 300%. The diagonal lines rising diagonally to the right in FIG. 1 indicate the fixing points of the gather sheet 31, and the diagonal lines rising diagonally to the left indicate the fixing points of the gather sheet 51. Further, the extension ratio in the present specification means a value when the natural length of the elastic expansion/contraction member is 100%.

(Flat gather for legs)
The flat gather 40 is provided at a portion of the side flap portion SF that faces the base portion 31A of the gather sheet 31. At the outer side in the width direction of the back sheet 2 and the exterior sheet 12 forming the side flap portion SF, an elongated elastic elastic member 41 extending in the front-rear direction at a predetermined distance in the width direction is in a predetermined extended state. It is provided in. Accordingly, when the wearer wears the tape-type disposable diaper 100, the flat gathers 40 are pressed against the wearer's legs by the contracting force of the elastic expansion/contraction member 41 to prevent leakage of excrement to the outside. You can

As the elastic expansion/contraction member 41, a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, or the like, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, Commonly used materials such as styrene butadiene, silicon, polyester, etc. can be used. The interval between the elastic expansion/contraction members 41 is preferably about 2 to 15 mm, and particularly preferably about 3 to 7 mm. Furthermore, the thickness of the elastic expansion/contraction member 41 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm in the case of natural rubber, particularly about 0.5 to 3 mm), and the expansion rate at the time of attachment. Is preferably about 150 to 250%, particularly preferably about 160 to 200%.

(Three-dimensional gather for the back side)
As shown in FIG. 5, the base portion 51A of the gather sheet 51 forming the three-dimensional gather 50 for the back side is fixed to the middle portion in the width direction of the back side portion of the inner surface of the top sheet 1. Both sides of the inner surface of the rising portion 51B of the gather sheet 51 in the width direction are fixed to the outer surface of the gather sheet 31 facing the inner surface of the top sheet 1, and are located in the middle portion of the rising portion 51B of the gather sheet 51 in the width direction. Is provided with a plurality of elongated elastic stretchable members 52 extending in the width direction at predetermined intervals in the front-rear direction in a predetermined extended state. As a result, when the wearer wears the tape-type disposable diaper 100, the standing portion 51B is erected toward the wearer's back by the contracting force of the elastic stretchable member 52, and the tip of the standing portion 51B is placed on the wearer. It is possible to prevent the excrement from leaking to the outside by pressing it against the back of the person.

Like the gather sheet 31, the gather sheet 51 may be a nonwoven fabric such as a spunbonded nonwoven fabric, a plastic film similar to that used for the back sheet 2, or a laminated sheet thereof, but the feel to the skin In this respect, a non-woven fabric that has been subjected to a water repellent treatment is preferable.

As the elastic expansion/contraction member 52, a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a band shape, or the like, like the elastic expansion/contraction member 32, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber. Commonly used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicone and polyester can be used. Moreover, the thickness of the elastic expansion/contraction member 32 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm in the case of natural rubber, particularly about 0.5 to 3 mm), and the expansion rate at the time of attachment. Is preferably about 150 to 250%, particularly preferably about 160 to 200%.

(Flat gather for back side)
The flat gather 60 is provided at a portion of the end flap portion EF that faces the base portion 51A of the gather sheet 51. The base 51A of the gather sheet 51 is provided with elongated elastic elastic members 61 extending in the width direction at a predetermined interval in the front-rear direction in a predetermined extended state. Thereby, when the wearer wears the tape-type disposable diaper 100, the flat gather 60 is pressed against the wearer's back by the contracting force of the elastic expansion and contraction member 61 to prevent excrement from leaking to the outside. it can.

As the elastic expansion/contraction member 61, similar to the elastic expansion/contraction member 41, natural rubber or synthetic rubber formed in a thread shape, a string shape, a band shape, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber. Commonly used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicone and polyester can be used. The interval between the elastic expansion/contraction members 41 is preferably about 2 to 15 mm, and particularly preferably about 3 to 7 mm. Furthermore, the thickness of the elastic expansion/contraction member 41 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm in the case of natural rubber, particularly about 0.5 to 3 mm), and the expansion rate at the time of attachment. Is preferably about 150 to 250%, particularly preferably about 160 to 200%. Although the elastic expansion/contraction member 61 of the present embodiment is provided on the base portion 51A of the gather sheet 51, a separate sheet may be provided on the back side of the gather sheet 51 in the front-rear direction to provide the elastic expansion/contraction member 61.

(Fastening tape)
As shown in FIGS. 1 to 3, fastening tapes 70 extending outward are provided on the back side of the side flaps SF. The fastening tape 70 is formed of a base sheet 71 and a locking portion 72 provided on the inner surface of the front end portion of the base sheet 71. The base portion 73 of the base material sheet 71 is fixed between the exterior sheet 20 and the outer side portion of the gather sheet 31 in the width direction, and a perforation or the like is formed in the front-rear intermediate portion of the main body portion 74 of the base material sheet 71. A cutting portion 75 is formed.

The material of the base sheet 71 is preferably a non-woven fabric, and any known non-woven fabric can be used without particular limitation. As the fibers constituting the non-woven fabric, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, amides, etc., regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. Further, as a method for producing a nonwoven fabric, a known method such as a spunlace method, a spunbond method, an SMS method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method can be used. In particular, spunbonded nonwoven fabrics and SMS nonwoven fabrics using olefin fibers are preferable. Although the basis weight of the nonwoven fabric used can be appropriately determined, the total basis weight of the nonwoven fabric in the main body portion 5b is 20 to 75 g/m ² , and particularly 26 to 46 g/m ² , and the nonwoven fabric in the fixing portion 5f and the tip portion 5p. It is preferable that the total grammage of each is 35 to 130 g/m ² , and particularly 46 to 116 g/m ² . Within this range, the strength and rigidity of the base portion 73 fixed between the exterior sheet 20 and the gather sheet 31 can be secured, and the flexibility and stretchability of the main body portion 74 can be secured.

As the engaging portion 72, a hook material of a mechanical fastener is preferable. The hook member has a large number of engaging protrusions. The shape of the engaging protrusions is (A) L-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped However, any shape may be used. Also, an adhesive layer may be used instead of the hook material.

The length in the width direction of the tip portion 76 of the main body portion 74 is preferably 50 to 90% of the length of the main body portion 74. As a result, the upper fastening tape and the lower fastening tape formed by cutting the cutting portion 75 are inclined and stretched, and the engaging portions 74 of the upper fastening tape and the lower fastening tape are engaged with the target sheet 90. The degree of freedom of each position can be increased.

(Target sheet)
As the target sheet 90, a plastic film or a non-woven fabric having a large number of loop yarns on its surface is preferable. Accordingly, when the tape-type disposable diaper 100 is mounted on the wearer, the locking portion 72 of the fastening tape 70 can be efficiently locked to the target sheet 90.

INDUSTRIAL APPLICATION This invention can be utilized for an absorbent article.

1 top sheet 2 back sheet 3 absorber 11 slit (first slit)
12 slits (second slit)
13 Inner absorber 15 Folded part

Claims (8)

A liquid-permeable topsheet provided on the body side, a liquid-impermeable backsheet provided on the non-body side, and an absorbent body that absorbs excrement provided between the topsheet and the backsheet. In the provided absorbent article,
An inner absorber extending in the front-rear direction is provided at a portion of the inner surface on the body surface side of the absorber that faces the buttocks of the wearer, and a width is formed at both end portions in the front-rear direction of the inner surface on the body surface side of the absorber. Provided with an inner absorber extending in the direction,
Increase the basis weight of the superabsorbent resin of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction than the basis weight of the superabsorbent resin of the absorber,
An absorbent article, characterized in that a first slit extending in the front-rear direction is provided in a portion of the top sheet facing the inner absorber extending in the front-rear direction in a plan view. The absorbent article according to claim 1, wherein an inner absorbent body extending in the front-rear direction is provided on a portion of the inner surface on the body surface side of the absorbent body facing the pubic area of the wearer. The basis weight of the super absorbent resin of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction is 600 to 1200 g/m ² , and the inner absorber extending in the front-rear direction and the width direction. The absorbent article according to claim 1 or 2, wherein the swelling height of the inner absorbent body is 15 to 30 mm when the superabsorbent resin of the inner absorbent body extending in the swelled area swells. The absorbent article according to any one of claims 1 to 3, wherein a tip portion of the first slit is formed in a zigzag shape. The absorbent article according to any one of claims 1 to 4, wherein a second slit that intersects the first slit at a right angle and extends in the width direction is provided. A liquid-permeable topsheet provided on the body side, a liquid-impermeable backsheet provided on the non-body side, and an absorbent body that absorbs excrement provided between the topsheet and the backsheet. In the provided absorbent article,
An inner absorber extending in the front-rear direction is provided at a portion of the inner surface on the body surface side of the absorber that faces the buttocks of the wearer, and a width is formed at both end portions in the front-rear direction of the inner surface on the body surface side of the absorber. Provided with an inner absorber extending in the direction,
Increase the basis weight of the superabsorbent resin of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction than the basis weight of the superabsorbent resin of the absorber,
An absorbent article characterized in that a folded-back portion extending in the front-rear direction is provided at a portion of the top sheet facing both widthwise side portions of the inner absorber extending in the front-rear direction in a plan view. The absorbent article according to claim 6, wherein an inner absorbent body is provided on a portion of the inner surface of the absorbent body facing the body surface from the buttocks of the wearer. The basis weight of the super absorbent resin of the inner absorber extending in the front-rear direction and the inner absorber extending in the width direction is 600 to 1200 g/m ² , and the inner absorber extending in the front-rear direction and the width direction. The absorbent article according to claim 6 or 7, wherein the swelling height of the inner absorbent body is 15 to 30 mm when the superabsorbent resin of the inner absorbent body extending in the swelling swells.

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