JP2018122149A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper capable of preventing leakage of excrement from a back side part to outside.SOLUTION: A leg surrounding first three-dimensional gather is provided on each of both side parts of an absorber in a width direction, a back side second three-dimensional gather is provided on a back side part of the absorber in a cross direction. A base part of the second three-dimensional gather is fixed to a top sheet, both side parts of the second three-dimensional gather in the width direction are fixed to the first three-dimensional gather. The second three-dimensional gather is formed of a first gather sheet positioned on a body side and a second gather sheet positioned on a top sheet side. A first elastic stretchable member extending in a width direction is provided on a tip end part of a standing part of the first gather sheet, and the first gather sheet and the second gather sheet are fixed with fixing parts extending in the cross direction with a prescribed interval in the width direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a disposable diaper, and more particularly, to a disposable diaper provided with a three-dimensional gather for back side that prevents leakage of excrement to the outside.

  Conventionally, in order to prevent the excrement from leaking to the outside, an elastic elastic member is provided on the end flap on the back side of the disposable diaper to form a flat gather, and the end flap and the end of the back side of the absorber A means has been proposed in which a three-dimensional gather for the back side is formed, and both ends in the width direction of the three-dimensional gather are fixed to the three-dimensional gather for the legs. (Patent Document 1)

  In order to prevent the excrement from leaking to the outside, means for forming a flat gather by providing an elastic elastic member on the end flap on the back side of the disposable diaper has been proposed. (Patent Document 2)

Japanese Patent Laid-Open No. 7-184947 JP-A-9-215709

  However, according to the means of Patent Document 1, when the wearer takes a lying posture, the back side three-dimensional gathers lie down on the top sheet due to the weight of the wearer, and the tip of the three-dimensional gather and the top sheet Since a predetermined gap is not formed between the top sheet, the excrement remaining on the top sheet may pass through the inner surfaces of the top sheet, the three-dimensional gather, and the flat gather and leak to the outside.

  Further, in the method of Patent Document 2, when the wearer takes a lying posture, the flat gather for the back side is deformed into a flat shape depending on the weight of the wearer, and thus remains on the top sheet. There was a risk that excrement would leak outside through the top sheet and the inner surface of the flat gather.

  Therefore, the main problem of the present invention is that the backside three-dimensional gather is formed by the first and second gather sheets, and when the wearer wears the disposable diaper, the first gather sheet located on the wearer side is provided. Even when the wearer takes a lying posture by forming a corrugated uneven portion on the second gather sheet positioned on the top sheet side by contracting the elastic elastic member, the tip of the three-dimensional gather is removed from the top sheet. An object of the present invention is to provide a disposable diaper that can be separated at a predetermined interval to prevent the excrement from leaking out.

The present invention that has solved the above problems is as follows.
The invention according to claim 1 is provided between a liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the non-body side, and the top sheet and the back sheet. In disposable diapers with an absorber that absorbs excreta,
A first three-dimensional gather around the legs is provided on both sides in the width direction of the absorber, a second three-dimensional gather for the back side is provided on the back side in the front-rear direction of the absorber, and the base of the second three-dimensional gather Is fixed to the top sheet, both sides in the width direction of the second three-dimensional gather are fixed to the first three-dimensional gather, and the second three-dimensional gather is positioned on the body side and the first gather sheet positioned on the body side A two-gather sheet is provided, and a first elastic stretchable member extending in the width direction is provided at the front end of the upright portion of the first gather sheet, and the first gather sheet and the second gather sheet are arranged at a predetermined interval in the width direction. It is the disposable diaper characterized by fixing with the fixing | fixed part extended in the front-back direction across.

  The invention according to claim 2 is the disposable diaper according to claim 1, wherein the interval between the fixed portions located on both sides is formed wider than the interval between the fixed portions located in the central portion.

  The invention according to claim 3 is the disposable diaper according to claim 1 or 2, wherein the first gather sheet is formed to be liquid-impermeable and the second gather sheet is formed to be liquid-permeable.

  The invention which concerns on Claim 4 is a disposable diaper of any one of Claims 1-3 which provided the said 1st elastic elastic member in the front-back direction at predetermined intervals.

  The invention which concerns on Claim 5 is a disposable diaper of any one of Claims 1-4 which provided the 2nd elastic elastic member extended in the width direction at the front-end | tip part of the said 2nd gather sheet.

  The invention according to claim 6 is the disposable diaper according to claim 5, wherein the elongation rate of the first elastic stretchable member is larger than the stretch rate of the second elastic stretchable member.

The invention according to claim 7 is provided between a liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the non-body side, and between the top sheet and the back sheet. In disposable diapers with an absorber that absorbs excreta,
A first three-dimensional gather around the legs is provided on both sides in the width direction of the absorber, a second three-dimensional gather for the back side is provided on the back side in the front-rear direction of the absorber, and the base of the second three-dimensional gather Is fixed to the top sheet, both sides in the width direction of the second three-dimensional gather are fixed to the first three-dimensional gather, and the second three-dimensional gather is positioned on the body side, and the outer gathers are positioned on the body side. A third gathering sheet made of a sheet is provided, and a third elastic elastic member extending in the width direction is provided at the laminating portion of the inner gather sheet and the outer gather sheet positioned at the leading end of the standing portion of the third gather sheet The inner gather sheet and the third elastic elastic member are fixed by a fixing portion formed at a portion of the inner gather sheet facing the third elastic elastic member, and the outer gather sea And the third elastic elastic member is fixed by a fixing portion extending in the front-rear direction at a predetermined interval in the width direction formed in a portion facing the third elastic elastic member in the outer gather sheet. Disposable diapers.

  The invention according to claim 8 is the disposable diaper according to claim 7, wherein the third elastic elastic member is formed in a band shape.

  The invention according to claim 9 is the disposable diaper according to claim 7 or 8, wherein a plurality of the third elastic elastic members are provided in the front-rear direction at a predetermined interval.

  According to the first aspect of the present invention, the first three-dimensional gathers for the legs are provided on both sides in the width direction of the absorber, and the second three-dimensional gathers for the back side are provided on the back side in the front-rear direction of the absorber. The base of the second solid gather is fixed to the top sheet, the both sides in the width direction of the second solid gather are fixed to the first solid gather, and the first gather sheet and the top sheet are located on the body side. The first gathering sheet and the second gathering sheet are provided in the width direction. The first gathering sheet and the second gathering sheet are provided in the width direction. Since it fixed with the fixing | fixed part extended in the front-back direction at a predetermined space | interval, when a wearer wears a disposable diaper, a corrugated unevenness | corrugation is set to a 2nd gather sheet by the contraction force of a 1st elastic expansion-contraction member Part is formed, wearer It is possible to prevent leakage to the outside of the supine excrement predetermined gap is formed between the tip and the top sheet is also in the second gather sheet when orientation took.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the interval between the fixing portions located on both sides is formed wider than the interval between the fixing portions located at the central portion. The excrement moving on the side of the sheet can be efficiently moved to the uneven portion formed on the side, and leakage of excrement moving on the side of the top sheet can be prevented.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the first gather sheet is formed to be liquid-impermeable, and the second gather sheet is formed to be liquid-permeable. The excrement that has moved into the uneven portion passes through the top sheet and is absorbed by the absorber.

  According to the invention of claim 4, in addition to the effects of the invention of any one of claims 1 to 3, a plurality of first elastic elastic members are provided at predetermined intervals in the front-rear direction. Even when the weight of the wearer in the supine position is added to the three-dimensional gather, the shape of the concavo-convex portion can be further maintained, and leakage of excrement to the outside can be further prevented.

  According to invention of Claim 5, in addition to the effect by the invention of any one of Claims 1-4, the 2nd elastic expansion-contraction member extended in the width direction at the front-end | tip part of a 2nd gather sheet | seat is provided. Since it provided, a uniform uneven | corrugated | grooved part can be formed in a 2nd gather sheet.

  According to the sixth aspect of the invention, in addition to the effect of the fifth aspect of the invention, the elongation rate of the first elastic stretchable member is made larger than the elongation rate of the second elastic stretchable member. A uniform uneven part can be formed.

  According to the seventh aspect of the invention, the first three-dimensional gathers for the legs are provided on both sides in the width direction of the absorber, and the second three-dimensional gathers for the back side are provided on the back side in the front-rear direction of the absorber. The base part of the second three-dimensional gather is fixed to the top sheet, both sides in the width direction of the second three-dimensional gather are fixed to the first three-dimensional gather, and the inner gather sheet and the top sheet side are positioned on the body side. 3rd elasticity which is formed with the 3rd gathers sheet which consists of the outside gathers sheet located in, and extends in the width direction to the pasting part of the standing part of the 3rd gathers sheet, and the pasting part of the outside gathers sheet An elastic member is provided, and the inner gather sheet and the third elastic elastic member are fixed by a fixing portion formed at a portion facing the third elastic elastic member in the inner gather sheet, and the outer gather sheet and the third Since the elastic elastic member is fixed by the fixing portion extending in the front-rear direction at a predetermined interval in the width direction formed in the portion facing the third elastic elastic member in the outer gather sheet, the disposable diaper is attached to the wearer. When attached, a wave-shaped uneven portion is formed on the outer gather sheet by the contraction force of the third elastic expansion and contraction member, and even when the wearer takes a lying posture, the front end portion and the top sheet of the outer gather sheet A predetermined gap is formed between them to prevent the excrement from leaking out. Further, the second solid gather can be formed with a small number of parts, and the flexibility of the second solid gather is improved.

  According to the eighth aspect of the invention, in addition to the effect of the seventh aspect of the invention, since the third elastic expansion / contraction member is formed in a band shape, the third gathering portion is bonded to the inner gather sheet and the outer gather sheet. The elastic elastic member can be fixed securely.

  According to the ninth aspect of the invention, in addition to the effect of the seventh or eighth aspect of the invention, the plurality of third elastic elastic members are provided at predetermined intervals in the front-rear direction. Even when the person's weight is added to the three-dimensional gather, the shape of the concavo-convex portion can be further maintained, and leakage of excrement to the outside can be further prevented.

It is the inner surface top view which expand | deployed the disposable diaper. It is the outer surface top view which expand | deployed the disposable diaper. It is iii-iii sectional drawing of FIG. It is iv-iv sectional drawing of FIG. It is vv sectional drawing of FIG. It is explanatory drawing of the solid gathers of 1st Embodiment. It is explanatory drawing of the solid gathers of 2nd Embodiment. It is explanatory drawing of the solid gathers of 3rd Embodiment. It is explanatory drawing of the solid gathers of 4th Embodiment. It is explanatory drawing of the solid gathers of 5th Embodiment.

<Disposable diapers>
The disposable diaper provided with the solid gathers which form a corrugated uneven part in the site | part which opposes the top sheet which prevents the excretion of the excrement of the present invention to the outside is explained referring to an accompanying drawing. In this specification, the “front-rear direction” refers to the direction connecting the abdomen and the back side, “width direction” refers to the direction orthogonal to the front-rear direction, and “up-down direction” refers to the wearing state of the disposable diaper. The direction orthogonal to the waistline direction is referred to, the “inner surface” refers to the body side surface of each member, and the “outer surface” refers to the anti-body side surface. In addition, the fixed location fixed via adhesives, such as a hot melt required for description, is attached | subjected with the oblique line and the dot.

  As shown in FIGS. 1 and 2, the disposable diaper 100 includes a body-side liquid-permeable top sheet 1, a non-body-side liquid-impermeable back sheet 2, and the top sheet 1 and the back sheet 2. It is comprised from the absorber 3 provided. An exterior sheet 20 is provided on the outer surface of the back sheet 2.

  In order to prevent the excrement from leaking to the outside in the width direction of the absorbent body 3, three-dimensional gathers for legs (“first three-dimensional gather” in the claims) 30 are respectively provided. On the outside of the base portion, there are provided flat gathers 40 for leg circumferences that prevent leakage of excrement to the outside at a predetermined interval.

  On the back side of the absorbent body 3 in the front-rear direction, a backside three-dimensional gather (a “second three-dimensional gather” in the claims) 50 for preventing leakage of excrement to the outside is provided, and a base of the three-dimensional gather 50 is provided. Is provided with a backside flat gather 60 for preventing the excrement from leaking to the outside.

  End flap portions EF to which the absorber 3 does not extend are respectively provided on the outer side in the front-rear direction of the absorber 3, and side flap portions SF to which the absorber 3 does not extend are provided on the outer side in the width direction of the absorber 3. Each is provided.

  A fastening tape 70 extending outward is provided on the back side of the side flap portion SF, and the fastening tape 70 is provided on the abdomen side of the outer surface of the exterior sheet 20 when the disposable diaper 100 is attached to the wearer. A target sheet 90 is provided for locking.

(Top sheet)
The top sheet 1 extends outward from the outer peripheral edge of the absorbent body 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-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spun bond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the 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 outward from the outer peripheral edge of the absorber 3 and blocks movement of excrement 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 can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used. The weight per unit area of the backsheet 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, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, which is mixed and fixed with a superabsorbent polymer as necessary. . The pulp basis weight in the absorbent body 3 is preferably 100 to 500 g / m ² and the thickness is preferably 1 to 15 mm. Further, the basis weight of the superabsorbent resin is preferably 0 to 300 g / m ² , and if the superabsorbent resin content is too low, sufficient absorbability cannot be provided, and if it is too high, the entanglement between the pulp fibers is eliminated. , Twisting and cracking are likely to occur. Moreover, although the absorber 3 is formed in the hourglass shape in planar view, it can also be formed in a rectangular shape.

(Exterior sheet)
The exterior sheet 20 covers the back sheet 2 so that the outer surface of the disposable diaper 100 has a cloth-like appearance and feel. The exterior sheet 20 is preferably formed of a nonwoven fabric. As the material fiber, olefin fiber such as polyethylene or polypropylene, polyester fiber, polyamide fiber, etc., recycled fiber such as rayon and cupra, and natural fiber such as cotton can be used. The spun bond method, the thermal bond method, the air through method, the needle punch method and the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved.

In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can also be used. When a plurality of nonwoven fabrics are used, it is preferable to fix the nonwoven fabrics together with an adhesive such as hot melt. Moreover, when using a nonwoven fabric, the fiber basis weight is 10-50 g / m < ² >, Especially 15-30 g / m < ² > is preferable.

(3D gathers around the legs)
As shown in FIGS. 3 and 4, the base 31 </ b> A of the gather sheet 31 that forms the three-dimensional gathers 30 around the legs is an outer portion in the width direction of the inner surface of the top sheet 1 and an outer portion in the width direction of the inner surface of the back sheet 2. It is being fixed to the front-back direction. Further, both ends in the front-rear direction of the upright portion 31B of the gather sheet 31 are fixed to the outer portion in the width direction of the inner surface of the top sheet 1 and the outer portion in the width direction of the inner surface of the gather sheet 51 forming the three-dimensional gather 50. An intermediate portion in the front-rear direction of the upright portion 31 </ b> B 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 and is separated. The standing portion 31B is provided with a plurality of elongated elastic elastic members 32 extending in the front-rear direction with a predetermined interval in the width direction in a predetermined extended state. Thus, when the disposable diaper 100 is worn by the wearer, the standing portion 31B is raised toward the wearer's crotch portion by the contraction force of the elastic elastic member 32, and the tip of the standing portion 31B is placed on the wearer's crotch. It is possible to prevent leakage of excrement to the outside by pressing against the crotch portion.

  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 thereof can be used, but prevention of leakage of excrement to the outside is possible. In this respect, a nonwoven fabric subjected to water repellent treatment is preferable.

  As the elastic elastic member 32, natural rubber or synthetic rubber formed in a thread shape, string shape, belt shape, etc., specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, Commonly used materials such as styrene butadiene, silicon, and polyester can be used. The thickness of the elastic elastic member 32 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber). About 150 to 250%, particularly about 160 to 200% is preferable. In FIG. 1, the diagonally upward diagonal lines indicate the fixing points of the gather sheet 31, and the diagonally upward diagonal lines indicate the fixing points of the gather sheet 51.

(Flat gathering for legs)
The planar gather 40 is provided at a portion facing the base portion 31A of the gather sheet 31 in the side flap portion SF. On 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 with a predetermined interval in the width direction is in a predetermined extension state. Is provided. Thereby, when the disposable diaper 100 is mounted on the wearer, the flat gathers 40 can be pressed against the wearer's legs by the contraction force of the elastic elastic member 41 to prevent the excrement from leaking to the outside. .

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

(Backside solid gather)
As shown in FIG. 5, the base portion 51 </ b> A of the gather sheet 51 that forms the back-side three-dimensional gather 50 is fixed to the intermediate portion in the width direction of the back side portion of the inner surface of the top sheet 1. Further, both side portions in the width direction of the inner surface of the upright portion 51B of the gather sheet 51 are fixed to the outer surface of the gather sheet 31 facing the inner surface of the top sheet 1, and are arranged in the intermediate portion in the width direction of the upright portion 51B of the gather sheet 51. Are provided with a plurality of elongated elastic elastic members ("first elastic elastic members" in the claims) 52 extending in the width direction with a predetermined interval in the front-rear direction. As a result, when the disposable diaper 100 is worn by the wearer, the standing portion 51B is raised toward the wearer's back by the contraction force of the elastic elastic member 52, and the tip of the standing portion 51B is placed on the wearer's back. The excrement can be prevented from leaking to the outside.

[Three-dimensional gather of the first embodiment]
Next, the three-dimensional gather 50 according to the first embodiment of the present invention shown in FIG. 6 will be described. 6A is a plan view of the inner surface of the three-dimensional gather 50 according to the first embodiment, FIG. 6B is a sectional view taken along the line BB in FIG. 6A, and FIG. 6C is a sectional view taken along the line AA in FIG. d) is a side view of (a).

  As shown in FIGS. 6B and 6C, the gather sheet 51 is formed of a first gather sheet 53 located on the inner side and a second gather sheet 54 located on the outer side.

  The first gather sheet 53 is formed at an inner gather sheet 53 </ b> A that is folded back at the front and rear abdominal sides of the first gather sheet 53 and located outside and an outer gather sheet 53 </ b> B that is located outside. An elongated elastic elastic member 52 extending in the width direction is provided at the ventral side end portion of the folded portion, and the back side portion in the front-rear direction of the first gather sheet 53 is spaced a predetermined distance in the front-rear direction. A plurality of elongated elastic elastic members 61 extending in the width direction are provided.

  The second gather sheet 54 is formed of an inner gather sheet 54A that is folded and folded at the front and rear side of the second gather sheet 54, and an outer gather sheet 54B that is located outside.

  As shown in FIG. 6A, the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 are hot melts extending in the front-rear direction at a predetermined interval in the width direction. It is fixed by a fixing portion 55 made of an adhesive or the like. In addition, the fixing | fixed part 55 is extended in the front-back direction from the ventral side edge part of the outer side gather sheet | seat 53B, and the inner side gather sheet | seat 54A, and has faced the back side part.

  Accordingly, as shown in FIG. 6D, when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Since the portion 56 is formed and the top sheet 1 and the three-dimensional gather 50 can be separated from each other in the vertical direction, a large amount of excrement moving on the inner surface of the top sheet 1 moves into the uneven portion 56, Since it is absorbed by the absorbent body 3 through the top sheet 1 during the movement, the leakage of excrement to the outside can be prevented. Further, a flat gather 60 is formed in the center of the back side portion of the first gather sheet 53 in the width direction by the contraction force of the elastic elastic member 61, and a small amount of excrement moving on the inner surface of the first gather sheet 53 is flat. It is captured by the gather 60, and leakage of excrement to the outside can be prevented.

  The first gather sheet 53 that forms the gather sheet 51 is preferably formed of a liquid-impermeable material similarly to the back sheet 2, and the second gather sheet 54 that forms the gather sheet 51 is the same as the top sheet 1. It is preferable to form the liquid permeable material. Thereby, the excrement which moved in the uneven | corrugated | grooved part 56 can be permeate | transmitted the top sheet 1 during a movement, and can be efficiently guide | induced to the absorber 3. FIG.

  The elastic elastic member 52 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 32, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber. In general, materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc. can be used. However, the stretch rate of the elastic member 52 is about 150 to 300%, particularly 160 to 200%. Is preferred. Thereby, even when the weight of the wearer in the supine position is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 formed on the second gather sheet 54 can be maintained, and the excrement can be discharged to the outside. Can be prevented from leaking out.

[Solid gathers of the second embodiment]
Next, the three-dimensional gather 50 according to the second embodiment of the present invention shown in FIG. 7 will be described. 7A is a plan view of the inner surface of the three-dimensional gather 50 according to the second embodiment, FIG. 7B is a sectional view taken along the line BB in FIG. 7A, and FIG. 7C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 7B and 7C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53 </ b> A and an outer gather sheet 53 </ b> B, and an elastic elastic member 52 is provided at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 61 are provided on the back side. The second gather sheet 54 is formed of an inner gather sheet 54A and an outer gather sheet 54B.

  As shown in FIG. 7 (a), the center in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. The both side portions of the central portion in the width direction are fixed by fixing portions 55A extending in the front-rear direction with a predetermined interval in the width direction. The interval in the width direction of the fixing portion 55A adjacent to the fixing portion 55A is formed wider than the interval in the width direction of the fixing portion 55 adjacent to the fixing portion 55.

  Accordingly, as shown in FIG. 7D, when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Since the concavo-convex part 56A having a width wider than the width of the concavo-convex part 56 is formed on both sides of the central part, the excrement moving on the side part in the width direction of the inner surface of the topsheet 1 Can be efficiently moved to the concavo-convex portion 56A and absorbed by the absorbent body 3 via the top sheet 1 during movement in the concavo-convex portion 56A, and the leakage of excrement to the outside can be further prevented.

[Three-dimensional gather of the third embodiment]
Next, the three-dimensional gather 50 according to the third embodiment of the present invention shown in FIG. 8 will be described. 8A is a plan view of the inner surface of the three-dimensional gather 50 according to the third embodiment, FIG. 8B is a sectional view taken along the line BB in FIG. 8A, and FIG. 8C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 8B and 8C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53A and an outer gather sheet 53B. The first gather sheet 53 extends in the width direction at a predetermined interval in the front-rear direction at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 52 are provided, and a plurality of elastic elastic members 61 are provided on the back side portion of the first gather sheet 53. The second gather sheet 54 is formed of an inner gather sheet 54A and an outer gather sheet 54B.

  As shown in FIG. 8 (a), the center portion in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. It is being fixed by the fixing | fixed part 55 extended to.

  Thus, as shown in FIG. 8D, when the disposable diaper is worn on the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic stretchable member 52. Even if the weight of the wearer in a prone posture is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 can be further maintained, and the leakage of excrement to the outside is prevented. can do.

[The solid gathers of the fourth embodiment]
Next, the three-dimensional gather 50 according to the fourth embodiment of the present invention shown in FIG. 9 will be described. 9A is a plan view of the inner surface of the three-dimensional gather 50 according to the fourth embodiment, FIG. 9B is a sectional view taken along line BB in FIG. 9A, and FIG. 9C is a sectional view taken along line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 9B and 9C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53 </ b> A and an outer gather sheet 53 </ b> B, and an elastic elastic member 52 is provided at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 61 are provided on the back side. The second gather sheet 54 is formed by an inner gather sheet 54A and an outer gather sheet 54B. An elongated elastic elastic member (“first” in the claims) is formed at the ventral end of the folded portion of the second gather sheet 54. 2 elastic telescopic members ”) 57 are provided.

  The elastic elastic member 57 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 32, specifically, a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber. Ordinarily used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used. The elongation rate of the elastic elastic member 57 is preferably about 100 to 150%, particularly 110 to 140%, which is smaller than that of the elastic elastic member 52. Thereby, the wavy uneven portion 56 can be regularly formed on the second gather sheet 54.

  As shown in FIG. 9 (a), the center part in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. It is being fixed by the fixing | fixed part 55 extended to.

  Accordingly, as shown in FIG. 9 (d), when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Even if the weight of the wearer in a prone posture is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 can be further maintained, and the leakage of excrement to the outside is prevented. can do.

[The solid gathers of the fifth embodiment]
Next, the three-dimensional gather 50 according to the fifth embodiment of the present invention shown in FIG. 10 will be described. 10A is a plan view of the inner surface of the three-dimensional gather 50 according to the fifth embodiment, FIG. 10B is a sectional view taken along the line BB in FIG. 10A, and FIG. 10C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 10B and 10C, the gather sheet 51 is formed from a third gather sheet 65. The third gather sheet 65 is formed of an inner gather sheet 65A and an outer gather sheet 65B, and a belt-like elastic elastic member having a predetermined width in the front-rear direction is provided at the abdomen end of the bonded portion of the third gather sheet 65. ("Third elastic elastic member" in claims) 58 is provided.

  As shown in FIG. 10 (a), the inner gather sheet 65A and the elastic elastic member 58 are fixed all over by a fixing portion 59A made of hot melt adhesive or the like, and the outer gather sheet 65B and the elastic elastic member 58 are arranged in the width direction. It is fixed by a fixing portion 59B extending in the front-rear direction at a predetermined interval.

  Thus, as shown in FIG. 10D, when the disposable diaper is attached to the wearer, the contraction force of the elastic elastic member 58 causes the outer gather sheet 65B of the third gather sheet 65 to move up and down at the center in the width direction. Further, the wave-shaped uneven portion 56 can be easily formed, and the number of parts of the three-dimensional gather 50 can be reduced. The elastic elastic members 58 can be provided at a predetermined interval in the front-rear direction.

  As the elastic elastic member 58, natural rubber or synthetic rubber formed in a string shape, a belt shape or the like, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene Commonly used materials such as silicon and polyester can be used. The elongation rate of the elastic elastic member 58 is preferably about 150 to 300%, particularly 160 to 200%. Thereby, even when the weight of the wearer in the supine position is added to the three-dimensional gather 50, the shape of a part of the concavo-convex portions 56 formed on the outer gather sheet 65B can be maintained, and the excrement is discharged to the outside. Leakage can be prevented.

  The first to fifth embodiments of the present invention described above can also be applied to the three-dimensional gather 30 for legs. Thereby, the top sheet 1 and the three-dimensional gather 30 can be separated in the up-down direction, and the leakage of excrement to the outside can be further prevented.

(Back gather for backside)
The planar gather 60 is provided at a portion of the end flap portion EF that faces the base portion 51A of the gather sheet 51. An elongated elastic elastic member 61 extending in the width direction with a predetermined interval in the front-rear direction is provided in the base 51A of the gather sheet 51 in a predetermined extended state. Thereby, when the disposable diaper 100 is worn by the wearer, the flat gather 60 can be pressed against the wearer's back by the contraction force of the elastic elastic member 61 to prevent the excrement from leaking to the outside.

  The elastic elastic member 61 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 41, specifically a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber. Ordinarily used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used. The interval between the elastic elastic members 41 is preferably about 2 to 15 mm, particularly about 3 to 7 mm. Furthermore, the thickness of the elastic elastic member 41 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber), and the elongation at the time of attachment is About 150 to 250%, particularly about 160 to 200% is preferable. In addition, although the elastic elastic member 61 of this embodiment is provided in the base 51A of the gather sheet 51, a separate sheet may be provided on the back side in the front-rear direction of the gather sheet 51 to provide the elastic elastic member 61.

(Fastening tape)
As shown in FIGS. 1-3, the fastening tape 70 extended toward the outer side is each provided in the back side part of side flap part SF. The fastening tape 70 is formed of a base sheet 71 and a locking portion 72 provided on the inner surface of the tip portion of the base sheet 71. The base portion 73 of the base sheet 71 is fixed between the outer portions of the exterior sheet 20 and the gather sheet 31 in the width direction, and the intermediate portion in the front-rear direction of the main body portion 74 of the base sheet 71 includes perforations. 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 any particular limitation. As fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a manufacturing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. In particular, a spunbond nonwoven fabric and an SMS nonwoven fabric using olefin fibers are preferable. The basis weight of the nonwoven fabric to be used can be determined as appropriate, but the total basis weight of the nonwoven fabric in the main body portion 5b is 20 to 75 g / m ² , particularly 26 to 46 g / m ² , and the nonwoven fabric in the fixing portion 5f and the tip portion 5p. Are preferably 35 to 130 g / m ² , 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 locking portion 72, a hook material of a mechanical fastener is preferable. The hook material has a large number of engaging protrusions. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Moreover, it can replace with a hook material and can also use an adhesive layer.

  The length in the width direction of the distal end portion 76 of the main body portion 74 is preferably formed to be 50 to 90% of the length of the main body portion 74. Thus, 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 nonwoven fabric having a large number of loop yarns provided on the surface thereof is preferable. Thereby, when mounting | wearing the wearer with the disposable diaper 100, the latching | locking part 72 of the fastening tape 70 can be latched to the target sheet | seat 90 efficiently.

  The present invention can be used for a tape-type disposable diaper, a pants-type disposable diaper, a pad, and the like.

1 Top sheet 2 Back sheet 3 Absorber 30 Solid gather (first solid gather)
50 solid gather (second solid gather)
51A Base 51B Standing portion 52 Elastic elastic member (first elastic elastic member)
53 1st gather sheet 54 2nd gather sheet 55 Fixing part 55A Fixing part 57 Elastic elastic member (2nd elastic elastic member)
58 Elastic elastic member (third elastic elastic member)
59A fixing part 59B fixing part 65 3rd gather sheet 65A inside gather sheet 65B outside gather sheet

  The present invention relates to a disposable diaper, and more particularly, to a disposable diaper provided with a three-dimensional gather for back side that prevents leakage of excrement to the outside.

  Conventionally, in order to prevent the excrement from leaking to the outside, an elastic elastic member is provided on the end flap on the back side of the disposable diaper to form a flat gather, and the end flap and the end of the back side of the absorber A means has been proposed in which a three-dimensional gather for the back side is formed, and both ends in the width direction of the three-dimensional gather are fixed to the three-dimensional gather for the legs. (Patent Document 1)

  In order to prevent the excrement from leaking to the outside, means for forming a flat gather by providing an elastic elastic member on the end flap on the back side of the disposable diaper has been proposed. (Patent Document 2)

Japanese Patent Laid-Open No. 7-184947 JP-A-9-215709

  However, according to the means of Patent Document 1, when the wearer takes a lying posture, the back side three-dimensional gathers lie down on the top sheet due to the weight of the wearer, and the tip of the three-dimensional gather and the top sheet Since a predetermined gap is not formed between the top sheet, the excrement remaining on the top sheet may pass through the inner surfaces of the top sheet, the three-dimensional gather, and the flat gather and leak to the outside.

  Further, in the method of Patent Document 2, when the wearer takes a lying posture, the flat gather for the back side is deformed into a flat shape depending on the weight of the wearer, and thus remains on the top sheet. There was a risk that excrement would leak outside through the top sheet and the inner surface of the flat gather.

  Therefore, the main problem of the present invention is that the backside three-dimensional gather is formed by the first and second gather sheets, and when the wearer wears the disposable diaper, the first gather sheet located on the wearer side is provided. Even when the wearer takes a lying posture by forming a corrugated uneven portion on the second gather sheet positioned on the top sheet side by contracting the elastic elastic member, the tip of the three-dimensional gather is removed from the top sheet. An object of the present invention is to provide a disposable diaper that can be separated at a predetermined interval to prevent the excrement from leaking out.

The present invention that has solved the above problems is as follows.
The invention according to claim 1 is provided between a liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the non-body side, and the top sheet and the back sheet. In disposable diapers with an absorber that absorbs excreta,
A first three-dimensional gather around the legs is provided on both sides in the width direction of the absorber, a second three-dimensional gather for the back side is provided on the back side in the front-rear direction of the absorber, and the base of the second three-dimensional gather Is fixed to the top sheet, both sides in the width direction of the second three-dimensional gather are fixed to the first three-dimensional gather, and the second three-dimensional gather is positioned on the body side and the first gather sheet positioned on the body side A two-gather sheet is provided, and a first elastic stretchable member extending in the width direction is provided at the front end of the upright portion of the first gather sheet, and the first gather sheet and the second gather sheet are arranged at a predetermined interval in the width direction. It is the disposable diaper characterized by fixing with the fixing | fixed part extended in the front-back direction across.

  The invention according to claim 2 is the disposable diaper according to claim 1, wherein the interval between the fixed portions located on both sides is formed wider than the interval between the fixed portions located in the central portion.

  The invention according to claim 3 is the disposable diaper according to claim 1 or 2, wherein the first gather sheet is formed to be liquid-impermeable and the second gather sheet is formed to be liquid-permeable.

  The invention which concerns on Claim 4 is a disposable diaper of any one of Claims 1-3 which provided the said 1st elastic elastic member in the front-back direction at predetermined intervals.

  The invention which concerns on Claim 5 is a disposable diaper of any one of Claims 1-4 which provided the 2nd elastic elastic member extended in the width direction at the front-end | tip part of the said 2nd gather sheet.

  The invention according to claim 6 is the disposable diaper according to claim 5, wherein the elongation rate of the first elastic stretchable member is larger than the stretch rate of the second elastic stretchable member.

  According to the first aspect of the present invention, the first three-dimensional gathers for the legs are provided on both sides in the width direction of the absorber, and the second three-dimensional gathers for the back side are provided on the back side in the front-rear direction of the absorber. The base of the second solid gather is fixed to the top sheet, the both sides in the width direction of the second solid gather are fixed to the first solid gather, and the first gather sheet and the top sheet are located on the body side. The first gathering sheet and the second gathering sheet are provided in the width direction. The first gathering sheet and the second gathering sheet are provided in the width direction. Since it fixed with the fixing | fixed part extended in the front-back direction at a predetermined space | interval, when a wearer wears a disposable diaper, a corrugated unevenness | corrugation is set to a 2nd gather sheet by the contraction force of a 1st elastic expansion-contraction member Part is formed, wearer It is possible to prevent leakage to the outside of the supine excrement predetermined gap is formed between the tip and the top sheet is also in the second gather sheet when orientation took.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the interval between the fixing portions located on both sides is formed wider than the interval between the fixing portions located at the central portion. The excrement moving on the side of the sheet can be efficiently moved to the uneven portion formed on the side, and leakage of excrement moving on the side of the top sheet can be prevented.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the first gather sheet is formed to be liquid-impermeable, and the second gather sheet is formed to be liquid-permeable. The excrement that has moved into the uneven portion passes through the top sheet and is absorbed by the absorber.

  According to the invention of claim 4, in addition to the effects of the invention of any one of claims 1 to 3, a plurality of first elastic elastic members are provided at predetermined intervals in the front-rear direction. Even when the weight of the wearer in the supine position is added to the three-dimensional gather, the shape of the concavo-convex portion can be further maintained, and leakage of excrement to the outside can be further prevented.

  According to invention of Claim 5, in addition to the effect by the invention of any one of Claims 1-4, the 2nd elastic expansion-contraction member extended in the width direction at the front-end | tip part of a 2nd gather sheet | seat is provided. Since it provided, a uniform uneven | corrugated | grooved part can be formed in a 2nd gather sheet.

  According to the sixth aspect of the invention, in addition to the effect of the fifth aspect of the invention, the elongation rate of the first elastic stretchable member is made larger than the elongation rate of the second elastic stretchable member. A uniform uneven part can be formed.

It is the inner surface top view which expand | deployed the disposable diaper. It is the outer surface top view which expand | deployed the disposable diaper. It is iii-iii sectional drawing of FIG. It is iv-iv sectional drawing of FIG. It is vv sectional drawing of FIG. It is explanatory drawing of the solid gathers of 1st Embodiment. It is explanatory drawing of the solid gathers of 2nd Embodiment. It is explanatory drawing of the solid gathers of 3rd Embodiment. It is explanatory drawing of the solid gathers of 4th Embodiment. It is explanatory drawing of the solid gathers of 5th Embodiment.

<Disposable diapers>
The disposable diaper provided with the solid gathers which form a corrugated uneven part in the site | part which opposes the top sheet which prevents the excretion of the excrement of the present invention to the outside is explained referring to an accompanying drawing. In this specification, the “front-rear direction” refers to the direction connecting the abdomen and the back side, “width direction” refers to the direction orthogonal to the front-rear direction, and “up-down direction” refers to the wearing state of the disposable diaper. The direction orthogonal to the waistline direction is referred to, the “inner surface” refers to the body side surface of each member, and the “outer surface” refers to the anti-body side surface. In addition, the fixed location fixed via adhesives, such as a hot melt required for description, is attached | subjected with the oblique line and the dot.

  As shown in FIGS. 1 and 2, the disposable diaper 100 includes a body-side liquid-permeable top sheet 1, a non-body-side liquid-impermeable back sheet 2, and the top sheet 1 and the back sheet 2. It is comprised from the absorber 3 provided. An exterior sheet 20 is provided on the outer surface of the back sheet 2.

  In order to prevent the excrement from leaking to the outside in the width direction of the absorbent body 3, three-dimensional gathers for legs (“first three-dimensional gather” in the claims) 30 are respectively provided. On the outside of the base portion, there are provided flat gathers 40 for leg circumferences that prevent leakage of excrement to the outside at a predetermined interval.

  On the back side of the absorbent body 3 in the front-rear direction, a backside three-dimensional gather (a “second three-dimensional gather” in the claims) 50 for preventing leakage of excrement to the outside is provided, and a base of the three-dimensional gather 50 is provided. Is provided with a backside flat gather 60 for preventing the excrement from leaking to the outside.

  End flap portions EF to which the absorber 3 does not extend are respectively provided on the outer side in the front-rear direction of the absorber 3, and side flap portions SF to which the absorber 3 does not extend are provided on the outer side in the width direction of the absorber 3. Each is provided.

  A fastening tape 70 extending outward is provided on the back side of the side flap portion SF, and the fastening tape 70 is provided on the abdomen side of the outer surface of the exterior sheet 20 when the disposable diaper 100 is attached to the wearer. A target sheet 90 is provided for locking.

(Top sheet)
The top sheet 1 extends outward from the outer peripheral edge of the absorbent body 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-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spun bond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the 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 outward from the outer peripheral edge of the absorber 3 and blocks movement of excrement 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 can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used. The weight per unit area of the backsheet 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, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, which is mixed and fixed with a superabsorbent polymer as necessary. . The pulp basis weight in the absorbent body 3 is preferably 100 to 500 g / m ² and the thickness is preferably 1 to 15 mm. Further, the basis weight of the superabsorbent resin is preferably 0 to 300 g / m ² , and if the superabsorbent resin content is too low, sufficient absorbability cannot be provided, and if it is too high, the entanglement between the pulp fibers is eliminated. , Twisting and cracking are likely to occur. Moreover, although the absorber 3 is formed in the hourglass shape in planar view, it can also be formed in a rectangular shape.

(Exterior sheet)
The exterior sheet 20 covers the back sheet 2 so that the outer surface of the disposable diaper 100 has a cloth-like appearance and feel. The exterior sheet 20 is preferably formed of a nonwoven fabric. As the material fiber, olefin fiber such as polyethylene or polypropylene, polyester fiber, polyamide fiber, etc., recycled fiber such as rayon and cupra, and natural fiber such as cotton can be used. The spun bond method, the thermal bond method, the air through method, the needle punch method and the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved.

In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can also be used. When a plurality of nonwoven fabrics are used, it is preferable to fix the nonwoven fabrics together with an adhesive such as hot melt. Moreover, when using a nonwoven fabric, the fiber basis weight is 10-50 g / m < ² >, Especially 15-30 g / m < ² > is preferable.

(3D gathers around the legs)
As shown in FIGS. 3 and 4, the base 31 </ b> A of the gather sheet 31 that forms the three-dimensional gathers 30 around the legs is an outer portion in the width direction of the inner surface of the top sheet 1 and an outer portion in the width direction of the inner surface of the back sheet 2. It is being fixed to the front-back direction. Further, both ends in the front-rear direction of the upright portion 31B of the gather sheet 31 are fixed to the outer portion in the width direction of the inner surface of the top sheet 1 and the outer portion in the width direction of the inner surface of the gather sheet 51 forming the three-dimensional gather 50. An intermediate portion in the front-rear direction of the upright portion 31 </ b> B 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 and is separated. The standing portion 31B is provided with a plurality of elongated elastic elastic members 32 extending in the front-rear direction with a predetermined interval in the width direction in a predetermined extended state. Thus, when the disposable diaper 100 is worn by the wearer, the standing portion 31B is raised toward the wearer's crotch portion by the contraction force of the elastic elastic member 32, and the tip of the standing portion 31B is placed on the wearer's crotch. It is possible to prevent leakage of excrement to the outside by pressing against the crotch portion.

  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 thereof can be used, but prevention of leakage of excrement to the outside is possible. In this respect, a nonwoven fabric subjected to water repellent treatment is preferable.

  As the elastic elastic member 32, natural rubber or synthetic rubber formed in a thread shape, string shape, belt shape, etc., specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, Commonly used materials such as styrene butadiene, silicon, and polyester can be used. The thickness of the elastic elastic member 32 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber). About 150 to 250%, particularly about 160 to 200% is preferable. In FIG. 1, the diagonally upward diagonal lines indicate the fixing points of the gather sheet 31, and the diagonally upward diagonal lines indicate the fixing points of the gather sheet 51.

(Flat gathering for legs)
The planar gather 40 is provided at a portion facing the base portion 31A of the gather sheet 31 in the side flap portion SF. On 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 with a predetermined interval in the width direction is in a predetermined extension state. Is provided. Thereby, when the disposable diaper 100 is mounted on the wearer, the flat gathers 40 can be pressed against the wearer's legs by the contraction force of the elastic elastic member 41 to prevent the excrement from leaking to the outside. .

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

(Backside solid gather)
As shown in FIG. 5, the base portion 51 </ b> A of the gather sheet 51 that forms the back-side three-dimensional gather 50 is fixed to the intermediate portion in the width direction of the back side portion of the inner surface of the top sheet 1. Further, both side portions in the width direction of the inner surface of the upright portion 51B of the gather sheet 51 are fixed to the outer surface of the gather sheet 31 facing the inner surface of the top sheet 1, and are arranged in the intermediate portion in the width direction of the upright portion 51B of the gather sheet 51. Are provided with a plurality of elongated elastic elastic members ("first elastic elastic members" in the claims) 52 extending in the width direction with a predetermined interval in the front-rear direction. As a result, when the disposable diaper 100 is worn by the wearer, the standing portion 51B is raised toward the wearer's back by the contraction force of the elastic elastic member 52, and the tip of the standing portion 51B is placed on the wearer's back. The excrement can be prevented from leaking to the outside.

[Three-dimensional gather of the first embodiment]
Next, the three-dimensional gather 50 according to the first embodiment of the present invention shown in FIG. 6 will be described. 6A is a plan view of the inner surface of the three-dimensional gather 50 according to the first embodiment, FIG. 6B is a sectional view taken along the line BB in FIG. 6A, and FIG. 6C is a sectional view taken along the line AA in FIG. d) is a side view of (a).

  As shown in FIGS. 6B and 6C, the gather sheet 51 is formed of a first gather sheet 53 located on the inner side and a second gather sheet 54 located on the outer side.

  The first gather sheet 53 is formed at an inner gather sheet 53 </ b> A that is folded back at the front and rear abdominal sides of the first gather sheet 53 and located outside and an outer gather sheet 53 </ b> B that is located outside. An elongated elastic elastic member 52 extending in the width direction is provided at the ventral side end portion of the folded portion, and the back side portion in the front-rear direction of the first gather sheet 53 is spaced a predetermined distance in the front-rear direction. A plurality of elongated elastic elastic members 61 extending in the width direction are provided.

  The second gather sheet 54 is formed of an inner gather sheet 54A that is folded and folded at the front and rear side of the second gather sheet 54, and an outer gather sheet 54B that is located outside.

  As shown in FIG. 6A, the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 are hot melts extending in the front-rear direction at a predetermined interval in the width direction. It is fixed by a fixing portion 55 made of an adhesive or the like. In addition, the fixing | fixed part 55 is extended in the front-back direction from the ventral side edge part of the outer side gather sheet | seat 53B, and the inner side gather sheet | seat 54A, and has faced the back side part.

  Accordingly, as shown in FIG. 6D, when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Since the portion 56 is formed and the top sheet 1 and the three-dimensional gather 50 can be separated from each other in the vertical direction, a large amount of excrement moving on the inner surface of the top sheet 1 moves into the uneven portion 56, Since it is absorbed by the absorbent body 3 through the top sheet 1 during the movement, the leakage of excrement to the outside can be prevented. Further, a flat gather 60 is formed in the center of the back side portion of the first gather sheet 53 in the width direction by the contraction force of the elastic elastic member 61, and a small amount of excrement moving on the inner surface of the first gather sheet 53 is flat. It is captured by the gather 60, and leakage of excrement to the outside can be prevented.

  The first gather sheet 53 that forms the gather sheet 51 is preferably formed of a liquid-impermeable material similarly to the back sheet 2, and the second gather sheet 54 that forms the gather sheet 51 is the same as the top sheet 1. It is preferable to form the liquid permeable material. Thereby, the excrement which moved in the uneven | corrugated | grooved part 56 can be permeate | transmitted the top sheet 1 during a movement, and can be efficiently guide | induced to the absorber 3. FIG.

  The elastic elastic member 52 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 32, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber. In general, materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc. can be used. However, the stretch rate of the elastic member 52 is about 150 to 300%, particularly 160 to 200%. Is preferred. Thereby, even when the weight of the wearer in the supine position is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 formed on the second gather sheet 54 can be maintained, and the excrement can be discharged to the outside. Can be prevented from leaking out.

[Solid gathers of the second embodiment]
Next, the three-dimensional gather 50 according to the second embodiment of the present invention shown in FIG. 7 will be described. 7A is a plan view of the inner surface of the three-dimensional gather 50 according to the second embodiment, FIG. 7B is a sectional view taken along the line BB in FIG. 7A, and FIG. 7C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 7B and 7C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53 </ b> A and an outer gather sheet 53 </ b> B, and an elastic elastic member 52 is provided at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 61 are provided on the back side. The second gather sheet 54 is formed of an inner gather sheet 54A and an outer gather sheet 54B.

  As shown in FIG. 7 (a), the center in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. The both side portions of the central portion in the width direction are fixed by fixing portions 55A extending in the front-rear direction with a predetermined interval in the width direction. The interval in the width direction of the fixing portion 55A adjacent to the fixing portion 55A is formed wider than the interval in the width direction of the fixing portion 55 adjacent to the fixing portion 55.

  Accordingly, as shown in FIG. 7D, when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Since the concavo-convex part 56A having a width wider than the width of the concavo-convex part 56 is formed on both sides of the central part, the excrement moving on the side part in the width direction of the inner surface of the topsheet 1 Can be efficiently moved to the concavo-convex portion 56A and absorbed by the absorbent body 3 via the top sheet 1 during movement in the concavo-convex portion 56A, and the leakage of excrement to the outside can be further prevented.

[Three-dimensional gather of the third embodiment]
Next, the three-dimensional gather 50 according to the third embodiment of the present invention shown in FIG. 8 will be described. 8A is a plan view of the inner surface of the three-dimensional gather 50 according to the third embodiment, FIG. 8B is a sectional view taken along the line BB in FIG. 8A, and FIG. 8C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 8B and 8C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53A and an outer gather sheet 53B. The first gather sheet 53 extends in the width direction at a predetermined interval in the front-rear direction at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 52 are provided, and a plurality of elastic elastic members 61 are provided on the back side portion of the first gather sheet 53. The second gather sheet 54 is formed of an inner gather sheet 54A and an outer gather sheet 54B.

  As shown in FIG. 8 (a), the center portion in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. It is being fixed by the fixing | fixed part 55 extended to.

  Thus, as shown in FIG. 8D, when the disposable diaper is worn on the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic stretchable member 52. Even if the weight of the wearer in a prone posture is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 can be further maintained, and the leakage of excrement to the outside is prevented. can do.

[The solid gathers of the fourth embodiment]
Next, the three-dimensional gather 50 according to the fourth embodiment of the present invention shown in FIG. 9 will be described. 9A is a plan view of the inner surface of the three-dimensional gather 50 according to the fourth embodiment, FIG. 9B is a sectional view taken along line BB in FIG. 9A, and FIG. 9C is a sectional view taken along line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 9B and 9C, the gather sheet 51 is formed of a first gather sheet 53 and a second gather sheet 54. The first gather sheet 53 is formed of an inner gather sheet 53 </ b> A and an outer gather sheet 53 </ b> B, and an elastic elastic member 52 is provided at the ventral end of the folded portion of the first gather sheet 53. A plurality of elastic elastic members 61 are provided on the back side. The second gather sheet 54 is formed by an inner gather sheet 54A and an outer gather sheet 54B. An elongated elastic elastic member (“first” in the claims) is formed at the ventral end of the folded portion of the second gather sheet 54. 2 elastic telescopic members ”) 57 are provided.

  The elastic elastic member 57 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 32, specifically, a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber. Ordinarily used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used. The elongation rate of the elastic elastic member 57 is preferably about 100 to 150%, particularly 110 to 140%, which is smaller than that of the elastic elastic member 52. Thereby, the wavy uneven portion 56 can be regularly formed on the second gather sheet 54.

  As shown in FIG. 9 (a), the center part in the width direction of the outer gather sheet 53B of the first gather sheet 53 and the inner gather sheet 54A of the second gather sheet 54 is the front-rear direction with a predetermined interval in the width direction. It is being fixed by the fixing | fixed part 55 extended to.

  Accordingly, as shown in FIG. 9 (d), when the disposable diaper is attached to the wearer, the corrugated unevenness is vertically formed at the center in the width direction of the second gather sheet 54 by the contraction force of the elastic elastic member 52. Even if the weight of the wearer in a prone posture is added to the three-dimensional gather 50, the shape of some of the uneven portions 56 can be further maintained, and the leakage of excrement to the outside is prevented. can do.

[The solid gathers of the fifth embodiment]
Next, the three-dimensional gather 50 according to the fifth embodiment of the present invention shown in FIG. 10 will be described. 10A is a plan view of the inner surface of the three-dimensional gather 50 according to the fifth embodiment, FIG. 10B is a sectional view taken along the line BB in FIG. 10A, and FIG. 10C is a sectional view taken along the line AA in FIG. d) is a side view of (a), the same members as those of the three-dimensional gather 50 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 10B and 10C, the gather sheet 51 is formed from a third gather sheet 65. The third gather sheet 65 is formed of an inner gather sheet 65A and an outer gather sheet 65B, and a belt-like elastic elastic member having a predetermined width in the front-rear direction is provided at the abdomen end of the bonded portion of the third gather sheet 65. ("Third elastic elastic member" in claims) 58 is provided.

  As shown in FIG. 10 (a), the inner gather sheet 65A and the elastic elastic member 58 are fixed all over by a fixing portion 59A made of hot melt adhesive or the like, and the outer gather sheet 65B and the elastic elastic member 58 are arranged in the width direction. It is fixed by a fixing portion 59B extending in the front-rear direction at a predetermined interval.

  Thus, as shown in FIG. 10D, when the disposable diaper is attached to the wearer, the contraction force of the elastic elastic member 58 causes the outer gather sheet 65B of the third gather sheet 65 to move up and down at the center in the width direction. Further, the wave-shaped uneven portion 56 can be easily formed, and the number of parts of the three-dimensional gather 50 can be reduced. The elastic elastic members 58 can be provided at a predetermined interval in the front-rear direction.

  As the elastic elastic member 58, natural rubber or synthetic rubber formed in a string shape, a belt shape or the like, specifically, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene Commonly used materials such as silicon and polyester can be used. The elongation rate of the elastic elastic member 58 is preferably about 150 to 300%, particularly 160 to 200%. Thereby, even when the weight of the wearer in the supine position is added to the three-dimensional gather 50, the shape of a part of the concavo-convex portions 56 formed on the outer gather sheet 65B can be maintained, and the excrement is discharged to the outside. Leakage can be prevented.

  The first to fifth embodiments of the present invention described above can also be applied to the three-dimensional gather 30 for legs. Thereby, the top sheet 1 and the three-dimensional gather 30 can be separated in the up-down direction, and the leakage of excrement to the outside can be further prevented.

(Back gather for backside)
The planar gather 60 is provided at a portion of the end flap portion EF that faces the base portion 51A of the gather sheet 51. An elongated elastic elastic member 61 extending in the width direction with a predetermined interval in the front-rear direction is provided in the base 51A of the gather sheet 51 in a predetermined extended state. Thereby, when the disposable diaper 100 is worn by the wearer, the flat gather 60 can be pressed against the wearer's back by the contraction force of the elastic elastic member 61 to prevent the excrement from leaking to the outside.

  The elastic elastic member 61 is a natural rubber or a synthetic rubber formed in a thread shape, a string shape, a belt shape, etc., like the elastic elastic member 41, specifically a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber. Ordinarily used materials such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used. The interval between the elastic elastic members 41 is preferably about 2 to 15 mm, particularly about 3 to 7 mm. Furthermore, the thickness of the elastic elastic member 41 is preferably about 500 to 1500 dtex, particularly about 800 to 1300 dtex (about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber), and the elongation at the time of attachment is About 150 to 250%, particularly about 160 to 200% is preferable. In addition, although the elastic elastic member 61 of this embodiment is provided in the base 51A of the gather sheet 51, a separate sheet may be provided on the back side in the front-rear direction of the gather sheet 51 to provide the elastic elastic member 61.

(Fastening tape)
As shown in FIGS. 1-3, the fastening tape 70 extended toward the outer side is each provided in the back side part of side flap part SF. The fastening tape 70 is formed of a base sheet 71 and a locking portion 72 provided on the inner surface of the tip portion of the base sheet 71. The base portion 73 of the base sheet 71 is fixed between the outer portions of the exterior sheet 20 and the gather sheet 31 in the width direction, and the intermediate portion in the front-rear direction of the main body portion 74 of the base sheet 71 includes perforations. 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 any particular limitation. As fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a manufacturing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. In particular, a spunbond nonwoven fabric and an SMS nonwoven fabric using olefin fibers are preferable. The basis weight of the nonwoven fabric to be used can be determined as appropriate, but the total basis weight of the nonwoven fabric in the main body portion 5b is 20 to 75 g / m ² , particularly 26 to 46 g / m ² , and the nonwoven fabric in the fixing portion 5f and the tip portion 5p. Are preferably 35 to 130 g / m ² , 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 locking portion 72, a hook material of a mechanical fastener is preferable. The hook material has a large number of engaging protrusions. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Moreover, it can replace with a hook material and can also use an adhesive layer.

  The length in the width direction of the distal end portion 76 of the main body portion 74 is preferably formed to be 50 to 90% of the length of the main body portion 74. Thus, 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 nonwoven fabric having a large number of loop yarns provided on the surface thereof is preferable. Thereby, when mounting | wearing the wearer with the disposable diaper 100, the latching | locking part 72 of the fastening tape 70 can be latched to the target sheet | seat 90 efficiently.

  The present invention can be used for a tape-type disposable diaper, a pants-type disposable diaper, a pad, and the like.

1 Top sheet 2 Back sheet 3 Absorber 30 Solid gather (first solid gather)
50 solid gather (second solid gather)
51A Base 51B Standing portion 52 Elastic elastic member (first elastic elastic member)
53 1st gather sheet 54 2nd gather sheet 55 Fixing part 55A Fixing part 57 Elastic elastic member (2nd elastic elastic member)
58 Elastic elastic member (third elastic elastic member)
59A fixing part 59B fixing part 65 3rd gather sheet 65A inside gather sheet 65B outside gather sheet

Claims (9)

A liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the non-body side, and an absorber that absorbs excrement provided between the top sheet and the back sheet. In the disposable diaper provided,
A first three-dimensional gather around the legs is provided on both sides in the width direction of the absorber, and a second three-dimensional gather is provided on the back side in the front-rear direction of the absorber;
Fixing the base of the second three-dimensional gather to a top sheet, fixing both sides of the width direction of the second three-dimensional gather to the first three-dimensional gather,
Forming the second three-dimensional gather with a first gather sheet located on the body side and a second gather sheet located on the top sheet side;
Providing a first elastic stretchable member extending in the width direction at the tip of the upright portion of the first gather sheet;
A disposable diaper, wherein the first gather sheet and the second gather sheet are fixed by a fixing portion extending in the front-rear direction at a predetermined interval in the width direction.   The disposable diaper according to claim 1, wherein an interval between the fixed portions located on both sides is formed wider than an interval between the fixed portions located at a central portion.   The disposable diaper according to claim 1 or 2, wherein the first gather sheet is liquid-impermeable and the second gather sheet is liquid-permeable.   The disposable diaper according to any one of claims 1 to 3, wherein a plurality of the first elastic elastic members are provided at a predetermined interval in the front-rear direction.   The disposable diaper of any one of Claims 1-4 which provided the 2nd elastic elastic member extended in the width direction in the front-end | tip part of the said 2nd gather sheet.   The disposable diaper according to claim 5, wherein an elongation rate of the first elastic stretchable member is larger than an elongation rate of the second elastic stretchable member. A liquid-permeable top sheet provided on the body side, a liquid-impermeable back sheet provided on the non-body side, and an absorber that absorbs excrement provided between the top sheet and the back sheet. In the disposable diaper provided,
A first three-dimensional gather around the legs is provided on both sides in the width direction of the absorber, and a second three-dimensional gather is provided on the back side in the front-rear direction of the absorber;
Fixing the base of the second three-dimensional gather to a top sheet, fixing both sides of the width direction of the second three-dimensional gather to the first three-dimensional gather,
The second three-dimensional gather is formed by a third gather sheet consisting of an inner gather sheet located on the body side and an outer gather sheet located on the top sheet side,
Providing a third elastic stretchable member extending in the width direction at the laminating portion of the inner gather sheet and the outer gather sheet located at the tip of the upright portion of the third gather sheet;
The inner gather sheet and the third elastic elastic member are fixed by a fixing portion formed at a portion of the inner gather sheet facing the third elastic elastic member, and the outer gather sheet and the third elastic elastic member are fixed to the outer side. A disposable diaper characterized by being fixed by a fixing portion extending in the front-rear direction at a predetermined interval in the width direction formed in a portion of the gather sheet facing the third elastic elastic member.   The disposable diaper according to claim 7, wherein the third elastic elastic member is formed in a band shape.   The disposable diaper according to claim 7 or 8, wherein a plurality of the third elastic elastic members are provided at predetermined intervals in the front-rear direction.

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