JP2000262555A - Disposable paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge effective absorbent surface area of an absorbent while standing height of a three-dimensional gather is enough ensured. SOLUTION: By arranging the first elastic stretchable member 10 which is located within standing sheet faces of barrier cuffs and is along approximately the longer direction of the paper diaper and is projected inward by being seen from the top view under developed condition of a paper diaper and is curved and the second elastic stretchable member 10 which is projected outward by being seen from the top view under developed condition of the paper diaper and is curved, after the barrier cuffs BK are stood toward the inside of an absorbent from the standing fixed end, it is turned outside at a site HP where the second elastic stretchable member 11 is arranged and is stood outward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable disposable diaper having a large effective absorbent surface area, while ensuring a sufficient standing height of three-dimensional gathers.

[0002]

2. Description of the Related Art At present, disposable disposable diapers have a three-dimensional gather that stands on the front side along the longitudinal direction of the disposable diaper on both sides. There are two methods from the viewpoint of the upright direction.

First, in the first method, as shown in FIG. 8, side flaps SF formed on both sides of a disposable diaper with a liquid-impermeable back sheet 1 by an adhesive and having no absorber 3 are formed. An inner sheet portion of the barrier sheet 4 (hereinafter, referred to as a three-dimensional gather forming sheet 4A) is formed to extend inward with a side edge of the absorber 3 as an upright base end, and a distal end of the three-dimensional gather forming sheet 4A. The three-dimensional gather forming sheet 4A is attached to the liquid-permeable sheet surface 2 at both ends of the three-dimensional gather forming sheet 4A in the longitudinal direction of the paper diaper. The second method is to turn the three-dimensional gather forming sheet 4A outward, as shown in FIG.
In this method, the three-dimensional gather forming sheet 4A is raised in an inverted C-shape in cross-section by fixing the outer surface of the paper diaper at both ends in the longitudinal direction to the surface of the barrier sheet 4. In the above example, the three-dimensional gathers are formed using the barrier sheet 4. However, the three-dimensional gathers may be separately formed using a single three-dimensional gather forming sheet.

Many commercially available disposable diapers employ the first method, and the second method includes, for example, those described in JP-A-5-317362. .

[0005]

The three-dimensional gather formed by the first method ensures that the excrement that is about to leak to the side is formed by the inwardly directed horizontal V-shaped pocket PK formed by the three-dimensional gather. However, on the other hand, three-dimensional gathers can easily cover the absorber surface, and the effective utilization width YB is reduced, so that the effective absorber surface area of the absorber 3 is reduced, and the absorption capacity is reduced. And other problems have occurred. In order to solve this problem, for example, if the standing height of the three-dimensional gathers is reduced,
This time, the elastic expansion / contraction member 9 arranged at the tip of the three-dimensional gathers does not fit securely on the skin, and problems such as excretion and urine leaking out of the gap will occur.

On the other hand, in the case of the three-dimensional gather formed by the second method, since the three-dimensional gather stands up from the upright fixed end of the three-dimensional gather, the three-dimensional gathers arranged on both sides are fixed. Although the absorbent area between the ends can be effectively used, there is a problem that excrement easily leaks out.

On the other hand, irrespective of the first or second method, in the case of this type of disposable diaper, the waist is adapted to the skin while being worn, or the absorbent absorbs urine. When the standing height of the three-dimensional gathers is not sufficient, a gap is formed between the diaper and the skin, and the excrement leaks sideways. There was also a problem that it became easy to do.

[0008] Therefore, a main object of the present invention is to prevent lateral leakage of excreta reliably by the lateral V-shaped pocket formed by the three-dimensional gathers, and to ensure the standing height of the three-dimensional gathers while maintaining the standing height of the absorber. It is an object of the present invention to provide a disposable disposable diaper which can have a large effective absorber surface area, and in which even if the disposable diaper slips down from a worn state, three-dimensional gathers follow the slipping down so as not to form a gap with the skin. .

[0009]

According to a first aspect of the present invention, an absorbent is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a disposable diaper is provided on both sides of the disposable diaper. In a disposable disposable diaper in which a three-dimensional gather that protrudes to the front side along the longitudinal direction, the disposable disposable diaper is formed in the upright sheet surface of the three-dimensional gather and substantially along the longitudinal direction of the disposable diaper. At the both ends in the longitudinal direction of the disposable diaper, and is fixed at a position on the fixed stationary end side relatively to the fixing position at the intermediate portion in the longitudinal direction of the disposable diaper. The first elastic expansion and contraction member is disposed in a polygonal line shape or a curved shape protruding inward when viewed from above, and is relatively fixed to the upright end portion side at both longitudinal ends of the disposable diaper. In the middle portion of the diaper in the longitudinal direction, the diaper is fixed at a fixed end side position relatively to the fixed position at the both ends in the longitudinal direction of the disposable diaper. The second elastic expansion and contraction member is provided in a curved shape.

Next, according to a second aspect of the present invention, an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and is disposed on both sides of the paper diaper in a standing state at the leading end portion in a developed state of the paper diaper. The disposable disposable diaper in which three-dimensional gathers protruding to the front side are formed by arranging the distal end elastic elastic members that are linear when viewed from the viewpoint, the disposable disposable diaper having the three-dimensional gathers in an upright sheet plane and a substantially longitudinal length of the disposable diaper. Along the direction, at both longitudinal end portions of the paper diaper, the diaper is relatively fixed to the upright end portion, and at the longitudinal middle portion of the paper diaper, the diaper is relatively fixed at the upright fixed end at the longitudinally opposite end portions thereof. The intermediate elastic elastic member is fixed to a side position and arranged in a polygonal line or a curved shape protruding outward in a plan view when the disposable diaper is deployed.

In these disposable disposable diapers, the elastic elastic members which are arranged in a polygonal line or a curved line when viewed in a plan view in the unfolded state of the disposable diaper include a fixing point at both ends in a longitudinal direction of the disposable diaper and a longitudinal direction of the disposable diaper. It is desirable that the amount of shift from the intermediate fixing point is at least 10 mm or more.

On the other hand, in order to ensure air permeability around the easily humid leg, the liquid-impermeable backsheet is formed to extend slightly laterally from both side edges of the absorber, and the liquid-permeable backsheet is formed. A paper diaper fixed in a side edge portion of the top sheet and the side extending portion, and a width direction intermediate portion of the barrier sheet forming the three-dimensional gather in a region extending from the side extending portion to the absorber side edge. Fixed along the longitudinal direction,
A side flap portion is formed by an outer barrier sheet portion extending laterally from the fixed portion, and the side flap portion is folded back at an outer edge portion, and a side elastic elastic member is arranged inside the folded portion to form a gasket cuff. What should I do?

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a partially exploded development view of a disposable diaper according to the present invention, and FIG. 2 is an enlarged development view of a main part thereof. In addition, in the figure, the mark "x" is a symbol indicating an adhesion site.

In FIG. 1, a disposable diaper is made of a cotton-like pulp or the like and has a rectangular or hourglass shape between a liquid-impervious back sheet 1 made of polyethylene or the like and a liquid-permeable top sheet 2 made of non-woven fabric or the like. An absorber 3 having a certain degree of rigidity is interposed. The absorber 3 can be wrapped with absorbent paper (not shown) to maintain its shape. In recent years, as the liquid-impermeable back sheet 1, a sheet having moisture permeability from the viewpoint of preventing stuffiness has been used. The water-impermeable and moisture-permeable sheet is a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially. is there. Further, as the liquid-permeable top sheet 2, a perforated or non-perforated nonwoven fabric or a perforated plastic sheet is used. The material fibers constituting the nonwoven fabric may be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, amides, etc., recycled fibers such as rayon and cupra, and natural fibers such as cotton.

The liquid-impervious back sheet 1 comprises an absorbent 3
Extends outward from the surrounding area to form a substantially hourglass shape,
The side extending portion, together with a side portion of the barrier sheet 4 described later, constitutes a side flap portion SF having no absorber. The liquid-permeable top sheet 2 has an hourglass shape slightly larger than the absorber 3, and a portion extending slightly outward from a side edge of the absorber 3 is provided between the barrier sheet 4 and the liquid-impermeable back sheet 1. And is fixed to the liquid-impermeable back sheet 1 side by a hot melt adhesive or the like. As a material for forming the barrier sheet 4, a plastic sheet or a melt-blown non-woven fabric can be used. However, a non-woven fabric subjected to a water-repellent treatment with silicon or the like is preferably used from the viewpoint of feel to the skin.

On the other hand, a liquid-impermeable back sheet 1 and a liquid-permeable top sheet 2 extend at the longitudinal ends of the paper diaper, ie, on the ventral side and the back side, to form an end flap portion EF in which the absorber 3 does not exist. Elastic elastic bands 5 and 6 made of urethane foam are interposed, and fastening tapes 7 and 7 are provided at both ends on the back side.

A pair of left and right barrier cuffs BK protruding toward the use surface along the longitudinal direction are provided on both sides of the disposable diaper.
(Three-dimensional gathers) are formed.

As shown in detail in FIG. 2, the barrier cuffs BK are formed by an inner sheet portion of the barrier sheet 4 provided to extend to the side flap portion SF corresponding to the liquid-impermeable back sheet 1. In this configuration, a position slightly inward of the side edge of the absorber 3 is used as an upright fixed end, and the inner surface is fixed to the liquid-permeable top sheet 2 at both ends TA in the longitudinal direction of the paper diaper.

The barrier cuff BK in the disposable disposable diaper has a leading end portion double-folded at a predetermined width,
One (or a plurality of sets) of the first elastic elastic member 10 and the second elastic elastic member 11 are disposed in the folded portion, that is, in the upright sheet surface according to the present invention.

As shown in FIG. 1, the first elastic expansion and contraction member 10 is fixed along the substantially longitudinal direction of the disposable diaper at the longitudinally intermediate portion in the longitudinal direction of the disposable diaper. At both ends in the longitudinal direction of the disposable diaper, the disposable diapers are arranged in a curved shape protruding inward when viewed in a plan view in a deployed state of the disposable diaper, which is fixed to a position at the fixed end side relatively to the fixing position at the intermediate portion in the longitudinal direction of the disposable diaper. The second elastic elastic member 11 is also fixed along the substantially longitudinal direction of the disposable diaper, at both ends in the longitudinal direction of the disposable diaper, relatively to the upstanding front end side, and the elastic elastic member 11 is provided. In the middle portion in the longitudinal direction, an elastic elastic member is provided, which is fixed at a position on the fixed end side relatively upright from the fixing position at both ends in the longitudinal direction of the paper diaper, and which is arranged in a curved shape protruding outward in plan view. is there. The first and second elastic members 10 and 11 may be arranged in a polygonal shape in plan view.

The first and second elastic members 10, 10
In reference numeral 11, the shift amounts S ₁ and S ₂ between the fixing points at both ends in the longitudinal direction of the paper diaper and the fixing points in the middle of the paper diaper in the longitudinal direction are desirably at least 10 mm or more. If the shift amounts S ₁ and S ₂ are too small, the first
In addition, the horizontal vector component acting on the second elastic members 10 and 11 becomes small, and the barrier cuff BK cannot be neatly warped.

In the barrier cuff BK in which the first and second elastic members 10 and 11 are disposed as described above, FIG.
As shown in the figure, after the erect member is erected from the erected fixed end toward the inside of the absorber, the portion HP where the second elastic elastic member 11 is disposed is provided.
(Hereinafter, it will be referred to as a warped midpoint.) Inverts outward and rises outward. That is, in FIG. 4, the standing shape line in the case of the barrier cuff having only the distal end elastic elastic member 9 as in the conventional art is indicated by a chain line K. In the case of the present barrier cuff BK, the first elastic expansion and contraction is performed at the standing distal end. the member 10, the horizontal vector component H ₁₀ corresponding to the shift amount S ₁ of the anchoring point in the disposable diaper end portions and an intermediate portion, acts with vertical vector components V _{1 0,} the horizontal vector component H ₁₀ As shown by the solid line in the figure, the distal end of the barrier cuff BK moves outward in the width direction of the disposable diaper due to the horizontal force, and the second elastic elastic member 11 at the upright intermediate portion connects the both ends and the intermediate portion of the disposable diaper. the horizontal vector component H ₁₁ corresponding to the shift amount S ₂ of the anchoring points, and vertical vector components V ₁₁ acts in the horizontal direction vector component As indicated by the solid line in the drawing by the horizontal force of _11, the middle portion of Bariyakafusu BK moves to the widthwise center side of the paper diaper, resulting in Bariyakafusu BK is toward the absorbent body side of the upright fixed end upright After that, it is turned outward at the warped intermediate point HP and rises outward.

The barrier cuff BK configured as described above
In the above, a horizontal V-shaped pocket PK is formed by the lower barrier sheet portion of the barrier cuff KB, and this portion can reliably prevent the lateral leakage of excrement, while ensuring a sufficient standing height. It is possible to increase the effective utilization width YB of the absorber. Further, the barrier cuffs BK have a warped structure. In other words, the barrier cuffs BK expand and contract in the vertical direction.
The expansion and contraction of K makes it possible to follow the sliding down of the paper diaper without leaving a gap between the skin and the skin.

On the other hand, the side flap SF existing outside the barrier cuffs BK has a plurality of, in this example, three, side-to-side diapers along the longitudinal direction of the diaper between the barrier sheet 4 and the liquid-impermeable back sheet 1. Are fixed by a hot melt adhesive or the like, and a pleated gasket cuff GK is formed by the elasticity of the elastic members. The elastic elastic members 8, 10, 11 may be made of commonly used materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, and polyethylene.

According to such a disposable diaper, the barrier cuff BK abuts around the wearer's leg when worn, and is formed of the barrier sheet portion below the midpoint HP of the barrier cuff BK and the liquid-permeable sheet 2. The horizontal V-shaped pocket functions as a pocket for excrement trapping, thereby reliably preventing the excrement from getting over, and urine passing through the liquid-permeable sheet 2 in the effective absorber area secured sufficiently wide. Is absorbed by the absorber 3. Temporarily, barrier cuffs BK
Even if it leaks in the lateral direction after getting over
The lateral leakage is prevented by the gasket cuffs GK formed by 8.

Further, the second elastic expansion / contraction member 11 makes it possible to surely raise the barrier sheet portion below the warped intermediate point HP, and also when the disposable diaper is in close contact with the skin. At least in the middle portion of the disposable diaper in the longitudinal direction, the second elastic elastic member 11 and the first elastic elastic member 10 arranged at the front end both fit into the skin, so that the barrier sheet portion above the intermediate point HP is bent back. Is in close contact with the skin in a planar manner to reliably prevent excrement from getting over.

On the other hand, in the above-described example of the disposable diaper, the side flap portion SF has a multilayer structure of a liquid-impervious back sheet 1 made of polyethylene or the like and a barrier sheet 4 made of a non-woven fabric. Lack of breathability.
Therefore, when worn for a long time, stuffiness becomes severe,
Especially in the summer months, it became a cause of hot flashes and eczema. In addition, a polyethylene sheet having relatively low flexibility has a problem that it is soft and hard to fit around the leg, and the wearer feels a feeling of stiffness.

Therefore, as shown in FIG. 5, the liquid-impervious backsheet 1 is formed so as to extend slightly laterally from both side edges of the absorber 3 and is formed on the side of the liquid-permeable topsheet 2. The barrier sheet 4 that is fixed at the edge and the side extending portion and that forms the barrier cuff BK is fixed along the substantially longitudinal direction of the paper diaper in a region extending from the side extending portion to the side edge of the absorber 3. Then, the side flap portion SF may be formed by the barrier sheet portion 4B extending laterally from the fixed portion. The side flap portion SF formed by the barrier sheet 4
In this case, the barrier sheet 4 is folded back at the outer edge, and the elastic elastic members 8, 8,... By configuring the side flap portions SF in this manner, high air permeability is ensured around the legs, and stuffiness and heat shrinkage are prevented. In addition, as the barrier sheet 4 used in this example, in order to prevent stuffiness, it is preferable to use a nonwoven fabric having a low basis weight and excellent air permeability. Specifically, it is desirable to use a nonwoven fabric made with a basis weight of about 18 to 23 g / m ² . In addition, it is desirable to use a water-repellent nonwoven fabric coated with a silicon-based, paraffin-based metal-based, alkylchromic-cloid-based water-repellent agent, etc., in order to reliably prevent the permeation of bodily fluids and enhance the feel to the skin. .

[Second Embodiment] In the disposable diaper shown in FIG. 6 as a second embodiment, the tip of the barrier cuff BK is double-folded with a predetermined width, and the tip inside the folded portion is disposed along the longitudinal direction of the disposable diaper. One (or a plurality of them) as a set, the tip elastic elastic member 12 is arranged linearly, and at both ends in the longitudinal direction of the disposable diaper, the tip is relatively fixed to the upright tip. At the middle portion in the longitudinal direction of the disposable diaper, a curved (or polygonal line) projecting outward in a plan view is fixed at a position on the fixed fixed end side relatively to the fixing position at both ends in the longitudinal direction of the disposable diaper. An intermediate elastic member 13 is provided.

In this arrangement, as shown in FIG. 7, the intermediate elastic elastic member 13 corresponds to the shift amount S of the fixing point at both ends of the paper diaper and the intermediate portion, as in the first example. the horizontal vector component H ₁₃ which acts and the vertical vector components V _13, an intermediate portion of Bariyakafusu BK moves to a paper diaper width direction center side by the action force of the horizontal vector component H _13. However, since it cannot physically be located on the center side of the position of the distal end elastic member 12, it is located below the distal elastic member 12, and is located above the middle elastic member 13. The seat portion stands upright or almost vertically.

Even in this case, a horizontal V-shaped pocket PK is formed by the lower barrier sheet portion of the barrier cuff KB, so that the lateral leakage of the excrement can be surely prevented by this portion, and the standing height is increased. It is possible to increase the effective utilization width YB of the absorber while ensuring sufficient height, and to secure a sufficient standing height for the barrier cuffs BK even if the paper diaper slips after mounting. Without leaving a gap with the skin,
Almost the same effects as in the case of the above-described first embodiment, such as being able to follow the slippage of the paper diaper, can be achieved.

Also in this case, it is desirable that the shift amount S between the fixing point at both ends in the longitudinal direction of the paper diaper and the fixing point in the middle of the paper diaper in the longitudinal direction is at least 10 mm or more. If the shift amount S is too small, the horizontal vector component acting on the intermediate elastic member 13 becomes small as described later, and the upper part of the intermediate elastic member 13 is substantially vertically moved from the position where the intermediate elastic member 13 is provided. You will not be able to stand.

Further, the barrier cuffs B are located closer to the distal end elastic expansion / contraction member 12 provided at the distal end of the barrier cuffs BK.
It is preferable to set the expansion and contraction force of the intermediate elastic member 13 disposed in the middle of K to be large. Specifically, it is preferable that the elastic force of the intermediate elastic member 13 is about 120 to 200% of the elastic force of the distal elastic member 12. If the elastic force of the distal elastic member 12 is too large,
The vertical vector component for starting up the barrier cuff BK becomes large, and it becomes difficult to move the middle portion of the barrier cuff BK to the longitudinal center side of the paper diaper against this vertical vector component.

Although the present invention has been described with reference to the example of the tape-fastening type disposable diaper, the present invention can be applied to the pants type disposable diaper.

[0036]

As described above in detail, according to the present invention, the barrier cuff is raised from the rising fixed end toward the inside of the absorber and then inverted outward from the intermediate point toward the outside or almost vertically from the intermediate point. You will stand up. Accordingly, the lateral V-shaped pocket formed by the lower barrier sheet portion can reliably prevent lateral leakage of excrement, and can secure the rising height of the barrier cuff while ensuring the effective absorbent surface area of the absorbent. Can be greatly increased.

Further, since the barrier cuff can be extended and contracted in the height direction or a sufficient standing height can be secured, even if the paper diaper slips from the mounted state, the barrier cuff follows the slip and follows the slip. Advantageously, such as no gap is formed at the same time.

[Brief description of the drawings]

FIG. 1 is a partially exploded development view of a disposable diaper according to a first embodiment.

FIG. 2 is an enlarged development view of the main part.

FIG. 3 is a cross-sectional view at the center of the disposable diaper.

FIG. 4 is a view for explaining an upright state of the barrier cuffs BK.

FIG. 5 is an enlarged development view of a main part showing a modification of the disposable diaper.

FIG. 6 is a partially exploded development view of a disposable diaper according to the second embodiment.

FIG. 7 is a view for explaining an upright state of the barrier cuffs BK.

FIG. 8 is a cross-sectional view of a conventional disposable diaper showing an example of forming three-dimensional gathers.

FIG. 9 is a cross-sectional view of a disposable diaper showing another conventional example of forming three-dimensional gathers.

[Explanation of symbols]

1. Liquid-impervious back sheet, 2: Liquid-pervious top sheet,
3 ... absorber, 4 ... barrier sheet, 5.6 ... elastic elastic band, 7 ... fastening tape, 8 ... side elastic elastic member,
Reference numeral 10: first elastic elastic member, 11: second elastic elastic member, 12: distal elastic elastic member, 13: intermediate elastic elastic member, HP: warped midpoint, BK: barrier cuff (solid gather), SF … Side flap, PK… horizontal V-shaped pocket

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B029 BD12 BD13 BD14 4C098 AA09 CC07 CC10 CC12 CC15 CC27 CE05 CE06

Claims (4)

[Claims] 1. A disposable device in which an absorber is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and three-dimensional gathers are formed on both sides of the disposable diaper so as to protrude to the surface side in the longitudinal direction of the disposable diaper. In the disposable diaper, in the upright sheet plane of the three-dimensional gather and along the substantially longitudinal direction of the disposable diaper, the longitudinally intermediate portion of the disposable diaper is relatively fixed to the upstanding front end side, and both ends of the disposable diaper in the longitudinal direction. In the disposable diaper, the first diaper is fixed at a position fixed to the upright fixed end side relative to the fixed position at the middle portion in the longitudinal direction of the disposable diaper. Elastic expansion and contraction members are arranged, and at both ends in the longitudinal direction of the paper diaper, they are relatively fixed to the upstanding front end side, and at the longitudinal middle part of the paper diaper, both ends in the longitudinal direction of the paper diaper. The second elastic expansion and contraction member is fixed to a position on the fixed end side relatively to the fixing position of the second diaper, and is arranged in a polygonal line or a curved shape protruding outward when viewed in a plan view when the disposable diaper is deployed. Disposable disposable diapers characterized by the following. 2. An absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. In a disposable disposable diaper in which a three-dimensional gather protruding to the surface side is formed by disposing a distal end elastic elastic member, the disposable diaper is provided within the upright sheet surface of the three-dimensional gather and substantially along the longitudinal direction of the disposable diaper. At both ends in the longitudinal direction, it is relatively fixed to the upright end portion side, and at the middle portion in the longitudinal direction of the disposable diaper, it is fixed to the upright fixed end side position relatively to the fixing position at the longitudinal ends of the disposable diaper. A disposable disposable diaper in which an intermediate elastic elastic member is disposed in a polygonal line or a curved shape protruding outward when viewed in a plan view when the disposable diaper is unfolded. 3. The elastic elastic member, which is arranged in a polygonal line or a curved shape when viewed in a plan view in a deployed state of the disposable diaper, is fixed at a fixing point at both ends in the longitudinal direction of the disposable diaper, and is fixed at an intermediate position in the longitudinal direction of the disposable diaper. 3. The disposable disposable diaper according to claim 1, wherein a shift amount with respect to a point is at least 10 mm or more. 4. The liquid-impermeable backsheet is formed so as to extend slightly laterally from both side edges of the absorber, and is fixed to a side edge of the liquid-permeable topsheet and the laterally extending portion. And, the width direction intermediate portion of the barrier sheet forming the three-dimensional gathers is fixed along the substantially longitudinal direction of the disposable diaper in a region extending from the laterally extending portion to the absorber side edge,
A side flap portion is formed by an outer barrier sheet portion extending laterally from the fixed portion, the side flap portion is folded back at an outer edge portion, and a side elastic elastic member is arranged inside the folded portion to form a gasket cuff. The disposable paper diaper according to any one of claims 1 to 3, wherein