JP4991367B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. In particular, the present invention relates to a disposable diaper that is preferable for an adult male.

This type of normally disposable paper diaper has been widely used in the past, and has, for example, a main body provided with a liquid-permeable surface sheet and an absorbent core laminated on the back side of the surface sheet. The back side is covered with an exterior sheet.
However, this type of disposable diaper continues to be researched and developed to improve the effect of preventing body fluid leakage. For example, it is an example of an absorbent pad that is used while being overlapped on the inside of a paper diaper, etc. `` Folding curves in the vicinity of both side edges extending to the rear overlap each other with the surface sheet inside, and extend in the vertical direction inside the side edges Are folded outwardly in the lateral direction and fixed along the folding line, and the rear part has a receiving space standing up from the rear edge and a flange extending from the folding line toward both side edges. (For example, refer to Patent Document 1). This absorbent pad is intended to improve the effect of preventing leakage particularly from both side edges and the rear edge.
However, in such an absorbent pad or a disposable diaper using this technical idea, for example, if the wearer's penis moves to the vicinity of the opening around the leg and urination is performed in this state, urine is released from the opening around the leg. Leakage may occur.
Therefore, the elastic elastic member is fixed under extension along the vertical direction between the longitudinal center line that bisects the dimension of the liquid absorbing core in the trunk circumference direction and both side edges of the liquid absorbing core, and the elastic elastic member is interposed between the elastic elastic members. There has been proposed a paper diaper in which the liquid absorption core is deformed into a convex shape toward the back side (non-skin contact side) by contraction of the elastic elastic member (see, for example, Patent Document 2).
However, according to this form of disposable diaper, for example, when the wearer is a male, when urination is performed while lying on his back, the urine is removed from the groin of the wearer (the base of the leg, i.e. There is a risk of leakage in the abdomen. This form of paper diaper is premised on the idea of keeping the wearer's penis stationary at the center of the waist area in the abdomen and crotch area, and leakage occurs even if this idea is satisfied It is not assumed that there is. Therefore, according to the disposable diaper of this form, even if it improves, the leak in the abdominal part of the urine which flowed on the ridge part cannot be prevented.
JP 2002-345882 A Japanese Patent No. 3745984

  The main problem to be solved by the present invention is to provide a disposable diaper in which urine does not flow on the wearer's ridge.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A paper diaper having a main body provided with a liquid-permeable top sheet and an absorbent core laminated on the back side of the top sheet, the back side of the main body being covered with an exterior sheet,
Both sides of the main body have the absorbent core, bend from the abdominal region to the crotch region, and bend toward the skin side along the wearer's groin,
Both bending, in the product state, the to 10~70mm protrude from the width direction center portion of the absorbent core, along with being carried out,
The exterior sheet is not bonded in the vicinity of the body portion and the bent portion, but is bonded in the width direction center side and the lateral side in the vicinity of the bent portion,
A space is provided between the portions opposed to each other by the bending, and the width of the space is enlarged toward the exterior sheet side,
The space between the portions facing each other by bending extends from the surface of the main body portion side of the outer sheet to the skin side of the wearer than the surface of the main body portion at the joint portion between the outer sheet and the main body portion. ing,
Paper diapers characterized by that.

[Invention of Claim 2]
The two bends are separated by 5 to 65 mm at the abdomen side end and 1 to 60 mm at the crotch side end, and this separation distance is more at the crotch side end than at the abdomen side end. The disposable diaper according to claim 1, wherein the disposable diaper is made to be 4 to 64 mm shorter.

[Invention of Claim 3]
As the main body, provided with a liquid-impermeable back sheet laminated on the back side of the absorbent core,
The disposable diaper according to claim 1 or 2, wherein the vicinity of the bending line is bonded to each other among the portions of the back sheet that are opposed by the bending .

[Invention of Claim 4]
As the main body, provided with a liquid-impermeable back sheet laminated on the back side of the absorbent core,
The disposable diaper according to claim 1 or 2, wherein an elastic elastic member extended in the direction of the bending line is fixed on a bending line formed by the bending of the back sheet.

[Invention of Claim 5]
The absorbent core is formed of stacked fiber pulp to which a polymer absorbent polymer is added,
And in the vicinity of the bent portion, the basis weight of at least one of the polymer-absorbing polymer and the stacked fiber pulp is made larger than that in the other portion to be a high absorption performance portion. 5. The paper diaper according to any one of 4 above.

[Invention of Claim 6]
The separation distance between the joint portion on the center side in the width direction and the joint portion on the side side is shorter on the crotch side than on the abdomen side on the exterior sheet. The paper diaper according to any one of the above.

[Invention of Claim 7]
The disposable diaper according to any one of claims 1 to 6, wherein the absorbent core is not provided in a back region.

  According to this invention, it becomes a paper diaper which urine does not have a possibility of flowing over a wearer's ridge part.

  Next, an embodiment of the present invention will be described. In the following, a case where the paper diaper is a “pants-type disposable paper diaper” will be described as an example, but the present invention is also applicable to a case where the paper diaper is a “fastening tape-type disposable paper diaper”.

[Basic structure]
About the paper diaper T of this form, the top view of the unfolded state was shown in FIG. 1, and the front view of the product state was each shown in FIG.
The paper diaper T of the present embodiment has a main body portion H, and the back surface side of the main body portion H is covered with an exterior sheet 5 having a rectangular shape, an hourglass shape, or the like, which is an hourglass shape in the illustrated example. The main body H is fixed to the central portion in the width direction of the exterior sheet 5 with a hot melt adhesive or the like. The main body H can be extended over the entire length from the abdominal region F to the back region B of the exterior sheet 5, but in the illustrated example, it extends from the abdominal region F to the crotch region K of the exterior sheet 5, B is not extended. This form is particularly suitable when the paper diaper T is for men. In the case of male use, if the main body H is extended from the abdominal region F to the crotch region K, urine can be sufficiently absorbed. On the other hand, since the main body part H is not extended to the back part area B, the back part area B becomes thin, so that the wearer's wearing discomfort is reduced and the movement of the wearer is less likely to be hindered.

  In this embodiment, the exterior sheet 5 defines the product shape over the entire outer surface of the paper diaper T, and is composed of a continuous sheet. The exterior sheet 5 can be formed by a sheet made of a single nonwoven fabric or the like, but can also be formed by a laminated sheet in which a plurality of sheets of 2, 3, 4, or more are laminated. Although this exterior sheet 5 has body fluid impermeability (water repellency) from the viewpoint of preventing stuffiness and the like, it is preferable that the exterior sheet 5 also has air permeability. As the material for the exterior sheet 5, an appropriately selected material can be used. Specifically, for example, heat-sealed, ultrasonically bonded, hot-bonded with a rayon spunlace nonwoven fabric blended with polypropylene-based heat fusion fibers and rayon fibers, and a melt blown nonwoven fabric mainly composed of urethane or isoprene rubber-based materials Examples thereof include those integrated by bonding with an adhesive such as a melt adhesive. In the case of using this material, it is preferable that the former nonwoven fabric (rayon spunlace nonwoven fabric) be on the wearer's skin side. In this embodiment, the liquid-impervious back sheet 2 is provided on the skin surface side of the exterior sheet 5 to prevent body fluid from getting through. Therefore, the exterior sheet 5 itself may be liquid permeable.

  As shown in FIG. 2, after the body sheet H is laminated and fixed, the exterior sheet 5 is configured so that both side edges of the abdominal region F and both side edges of the back region B are in the longitudinal direction (abdomen region). The direction connecting F and the back region B) is joined over the entire length by adhesion with an adhesive such as thermal fusion, thermocompression bonding, ultrasonic sealing, or hot melt. Thereby, the disposable diaper T in the product state in which the waist opening WO and the pair of left and right leg openings LO are formed is obtained. In FIG. 2, a joint portion between both side edges of the abdominal region F and both side edges of the back region B is denoted by reference numeral 29.

  In the present specification, the edge of the waist opening WO is referred to as “waist opening edge”, and the edge of the leg opening LO is referred to as “leg opening edge”, and the position where the leg opening edge and the joint portion 29 intersect each other, That is, the starting position of the leg opening edge is referred to as “leg opening start end”. The region from the waist opening edge to the leg opening starting edge is referred to as “abdominal region” F in the front body and “back region” B in the rear body. A region having a leg opening, that is, a region from a leg opening start end on the front body side to a leg opening start end on the back body side is referred to as a “groin area” K.

  In this embodiment, as shown in FIG. 1, the abdominal region F and the back region B are divided according to the concept of a waist part W1 located on the upper side in the product state and a lower waist part W2 located on the lower side of the waist part W1. be able to. The length in the longitudinal direction of W1 and W2 varies depending on the size of the product, but when the length in the longitudinal direction of the product is 800 to 880 mm, the waist portion W1 is 20 to 40 mm and the lower waist portion W2 is 160 to 300 mm. It is.

  The exterior sheet 5 is formed of a single sheet on the back surface (outer surface), and when formed of a plurality of sheets, between the sheets, the elastic elastic members 21 and 22 along the width direction. ... is fixed under extension. More specifically, in the waist part W1, one or a plurality of elastic stretch members 21 for improving the fit of the waist opening edge, or a plurality of elastic stretch members 21 in the illustrated example, are provided in parallel. Further, in the lower waist portion W2, one or a plurality of elastic elastic members 22 for improving the fit around the lower waist portion and reducing the leakage of urine before and after, a plurality in the illustrated example, are provided in parallel. Yes. As the elastic elastic members 21 and 22, for example, natural or synthetic thread-like rubber, belt-like rubber or the like having an appropriate thickness and cross-sectional shape can be used. However, as in the illustrated example, the distance between the elastic elastic members 21, 22,... Adjacent to each other in the longitudinal direction is preferably shorter in the waist portion W1 than in the lower waist portion W2. Furthermore, the exterior sheet 5 is provided with one or a plurality of elastic stretch members 23 for improving the fit of the leg opening edge and the crotch portion, three in the illustrated example. The elastic elastic member 23 extends from the abdomen or back side to the crotch side along the leg opening edge, extends in the width direction in the crotch region K, and further extends along the leg opening edge on the opposite side. It is fixed in a shape extending from the part side to the abdomen or back side and extending in this extending direction.

  In the present embodiment, the elastic elastic members 22 and 23 described above can be appropriately cut in a fixed state at a portion overlapping the main body portion H, thereby weakening the elastic force.

  On the other hand, as shown in FIG. 3 (1), the main body H is a liquid-permeable surface sheet 1 that directly touches the wearer's skin in a rectangular shape, hourglass shape, or the like made of a nonwoven fabric or a porous film. And laminated on the back side of the top sheet 1 and made of piled pulp or the like to which a polymer-absorbing polymer is added, and has a rectangular shape or hourglass shape. In the illustrated example, the crotch portion K side is tapered. Made of an absorbent core 3 having a certain degree of rigidity, and a sheet laminated on the back side of the absorbent core 3, such as a polyethylene sheet, a polylaminated nonwoven fabric, and a microvoid to transmit vapor but not liquid. Mainly from the liquid back sheet 2. In the illustrated example, the absorbent core 3 is covered with a covering sheet 4 made of tissue paper, crepe paper, or the like to maintain the shape. The covering sheet 4 is sufficient if it is liquid-permeable, and its material is not particularly limited. For example, the same material as illustrated as the top sheet 1 can be used. Specifically, for example, sanitary thin paper such as tissue paper, crepe paper, non-woven fabric, perforated sheet, and the like can be used. Although not shown, a second sheet made of a nonwoven fabric or the like can be provided under the liquid-permeable top sheet 1 to improve body fluid diffusibility. The second sheet is sufficient if it exhibits body fluid diffusibility and liquid permeability. For example, the same material as the top sheet 1 can be used. However, for example, spunlace, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond or crepe paper is preferable. The second sheet preferably has higher liquid permeability than the top sheet 1 and has a fiber density lower than that of the top sheet 1, for example, polypropylene, polyethylene, polyethylene terephthalate, polyamide, nylon, rayon, vinylon, acrylic and the like. More preferably, it is a nonwoven fabric.

  On the other hand, the back sheet 2 only needs to be liquid-impervious, and as its material, for example, an olefin resin such as polyethylene (PE) or polypropylene (PP), a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet, A non-woven fabric that is substantially liquid-impervious with a waterproof film interposed (in this case, the liquid-impervious back sheet 2 is composed of the waterproof film and the non-woven fabric) can be used. Of course, in addition to this, a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness can also be used. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given.

  3 (1) is a cross-sectional view taken along the line II in FIG. 1, but is for explaining the constituent members of the main body H, and the shape is simplified (the main body H is bent). Not) 3 (2) shows a cross-sectional view taken along the line II-II of FIG. 1 and clarifies that the main body H does not exist in the back region B.

  In this embodiment, the top sheet 1 is sufficient if it is liquid-permeable. Therefore, for example, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like can be used. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, olefins such as polyethylene (PE) and polypropylene (PP), polyesters, polyamides, etc., synthetic fibers such as rayon and cupra, natural fibers such as cotton, etc. are used. Mixed fibers can be used. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, and a needle punch method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  On the other hand, as shown in FIGS. 8 and 9, solid gathers 30 can be provided on both sides in the width direction of the main body H. The three-dimensional gather 30 is formed of a gather sheet 31 that is folded back to be double. The base end portion of the gather sheet 31 is sandwiched between the side end portion of the topsheet 1 and the side end portion of the backsheet 2 and is fixed by a hot melt adhesive or the like. Further, on the inner side of the gather sheet 31 in the vicinity of the folded free end portion, for example, one or a plurality of elastic elastic members 32 made of natural or synthetic thread-like rubber or belt-like rubber having an appropriate thickness and cross-sectional shape are extended. Underneath it is fixed with hot melt adhesive or the like. However, it is preferable that the elastic portion elastic member 32 contracts when it comes into contact with urine. According to this embodiment, when urination occurs, the elastic elastic member 32 contracts and the gather sheet 31 rises. Therefore, the effect of preventing side leakage of urine and the like is improved.

  As the gather sheet 31, for example, PE, PP (nonwoven fabric) or the like manufactured by spunbond, SMS, pointbond, air-through, airpoint or the like can be used, and in particular, those manufactured by SMS or spunbond are used. Is preferred.

[Characteristic structure]
Next, a characteristic structure of the present embodiment will be described.
As shown in FIGS. 1 and 4, in this embodiment, both side portions of the main body portion H are bent from the abdominal region F to the crotch region K so as to protrude along the wearer's ridge portion. As a result, bent portions 10 are formed. And both these bending parts 10 and 10 protrude 10-70 mm, preferably 20-40 mm rather than the width direction center part (part on a width direction centerline) of the absorption core 3 in a product state. The protruding length is a value based on the surface of the absorbent core 3 at the center in the width direction and based on the surface of the topsheet 1 (that is, the surface of the main body H) at the bent portion 10. The reason why the surface sheet 1 is lifted from the surface of the absorbent core 3 is that the surface of the absorbent core 3 is used as a reference instead of the surface of the main body H at the center in the width direction. In addition, in this form, since it is not convex on the skin non-contact side and the exterior sheet 5 has no irregularities in appearance, the design is excellent.

  According to this embodiment, in the wearing state, the two bent portions 10 and 10 come into contact with the ridge portions C2 and C2 of the wearer C, and the urine discharged from the penis C1 has the ridge portions C2 and C2 of the wearer C. No longer flows over (flow prevention effect). However, this effect becomes insufficient when the protruding length is less than 10 mm. On the other hand, even if the projecting length exceeds 70 mm, this effect is not improved. On the contrary, the cost for bending the main body H increases, and the main body H becomes bulky. Product transportation and storage costs increase.

  Here, the two bent portions 10 and 10 are 5 to 65 mm, preferably 10 to 40 mm apart at the abdomen side end portions 10F and 10F, and 1 to 60 mm, preferably 5 to 30 mm, at the crotch side end portions 10K and 10K. It is preferable that the separation distance is 4 to 64 mm, preferably 5 to 35 mm shorter at the crotch side end portions 10K and 10K than at the abdomen side end portions 10F and 10F. In this respect, the disposable diaper T of the present embodiment is not provided with the main body H in the back region B, and therefore hardly exhibits the absorption performance in the back region B, but conversely, the movement in the wearing state is hardly inhibited. ing. By having such a feature, the disposable diaper T is suitable when the wearer C is an “adult male who can move relatively freely”. And when the wearer C is an adult male, if the both bending parts 10 and 10 are formed so that it may become in each said numerical range, the said flow prevention effect will become reliable. Of course, this effect is based on the premise that the protruding lengths of both bent portions 10 and 10 are 10 to 70 mm.

  By the way, in this form, as above-mentioned, the liquid impervious back surface sheet 2 laminated | stacked on the back surface side of the absorption core 3 is provided as the main-body part H. As shown in FIG. In such a form, as shown in FIG. 5, the portions 2a and 2b adjacent to the bending line S formed by the bending of the back sheet 2 as shown in FIG. However, it is preferable that they are bonded to each other by, for example, a hot melt adhesive HM. According to this embodiment, the attracting forces f and f to the other side act on the bent line S vicinity 2a and 2b, respectively, so that the bent parts 10 and 10 are surely attached to the wearer's C ridge part C2 and C2 side. It protrudes to the (skin side).

  Similarly, in the case where a liquid-impervious back sheet 2 laminated on the back side of the absorbent core 3 is provided as the main body H, it is formed by bending the back sheet 2 as shown in FIG. It is also preferable that the elastic elastic member 12 extended in the direction of the bending line S (front and rear direction of the paper cotton) is fixed on the bending line S. Even in this configuration, the bent portions 10 and 10 are surely projected along the ridge portions C2 and C2 of the wearer C.

  The elastic expansion / contraction member 12 can be provided on the back side (upper side of the paper cotton) of the back side sheet 2, but as shown in the example of the drawing, the bent portions 10 and 10 protrude more when provided on the front side (lower side of the paper cotton). This is preferable because it is sure. Further, one or a plurality of elastic elastic members 12 can be provided, in the illustrated example, one. Furthermore, as the elastic stretchable member 12, for example, natural or synthetic thread rubber, belt rubber, or the like having an appropriate thickness and cross-sectional shape can be used.

  In this embodiment, as described above, there is no particular limitation as to what material the absorbent core 3 is formed of. As the absorbent core 3, for example, a fluffy pulp fiber aggregate (stacked pulp) in which a granular polymer absorbent polymer is mixed can be used. As such a polymer-absorbing polymer, a polymer that absorbs and retains bodily fluids, for example, 10 times or more of its own weight can be used. Examples of this include starch-based, cellulose-based, synthetic polymer-based, etc., such as starch-acrylic acid (salt) graft copolymer, starch-acrylonitrile copolymer saponified product, sodium carboxymethylcellulose crosslinked product, An acrylic acid (salt) polymer or the like can be used. As the shape of the polymer-absorbing polymer, a commonly used granular material is suitable, but other shapes can also be used.

  Quantitative arrangement, density distribution, etc. of piled pulp or polymer absorbent polymer is preferably uniform for the purpose of general purpose, but when aiming to exhibit special absorption characteristics, It is preferable to bias in accordance with the purpose. Specifically, in this embodiment, the absorbent core 3 is formed of a stacked fiber pulp to which a polymer-absorbing polymer is added, and in the vicinity of the bent portions 10, 10, the polymer-absorbing polymer and the stacked fiber are formed. It is preferable that the basis weight of at least one of the pulp is made larger than that in the other part to form a high absorption performance part. This is because urine or the like is likely to gather on the ridges C2 and C2 of the wearer C when urination is performed while lying on the back.

  On the other hand, the raw material of the piled pulp is not particularly limited. For example, known materials such as cotton-like pulp and synthetic pulp can be used. Moreover, the raw material fiber of a pulp is not specifically limited, For example, the cellulose fiber obtained from woods, such as a mechanical pulp, a chemical pulp, and a dissolving pulp, Artificial cellulose fibers, such as rayon and an acetate, etc. can be used. However, the wood used as the raw material for cellulose fibers is more preferable in terms of function and price because conifers have longer fiber lengths than hardwoods.

In this embodiment, as described above, it is preferable that the distance between the bent portions 10.10 is shorter at the crotch side end portions 10K and 10K than at the abdominal side end portions 10F and 10F. The method for obtaining this form is not particularly limited. However, in the present invention, as shown in FIG. 7, the exterior sheet 5 is not joined in the vicinity of the main body H and both the bent portions 10, 10, and the width direction center side in the vicinity of both the bent portions 10, 10. and in lateral side it takes the form that is bonded by a hot melt adhesive or the like. In this embodiment, the separation distance L between the joint portion X on the center side in the width direction and the joint portions Y and Y on the lateral side is set on the exterior sheet 5 more than on the abdomen side (see (1) in FIG. 7). If the length on the crotch part side (see (2) in FIG. 7) is shortened, the distance between the bent parts 10.10 is necessarily larger than that on the abdomen side end parts 10F and 10F. And the protrusion length of the bent portions 10 and 10 is higher on the crotch side than on the abdominal side, and the bent portions 10 and 10 The fit with respect to the heel portions C2 and C2 is improved.

  The present invention is particularly applicable as a disposable diaper for adult men.

It is a top view of the development state of a paper diaper. It is a front view of the product state of a disposable diaper. It is a figure for demonstrating the structural material in the II sectional view and the II-II sectional view of FIG. It is a cross-sectional schematic diagram of the wearing state of a paper diaper. It is a bending part form example. It is a bending part form example. It is a figure for demonstrating the formation method of a bending part. It is an example of arrangement | positioning of a three-dimensional gather. It is the III-III sectional view taken on the line of FIG.

  DESCRIPTION OF SYMBOLS 1 ... Top sheet, 2 ... Back sheet, 3 ... Absorption core, 4 ... Cover sheet, 5 ... Exterior sheet, 10 ... Bending part, 10F ... Abdomen side edge part, 10K ... Crotch part edge part, 21,22,23 , 32 ... Elastic elastic member, 29 ... Joint part, 30 ... Solid gather, 31 ... Gather sheet, B ... Back region, C ... Wearer, C1 ... Penis, C2 ... Saddle part, F ... Abdomen region, H ... Body Part, HM ... hot melt adhesive, K ... crotch area, LO ... leg opening, T ... paper diaper, W1 ... waist part, W2 ... lower waist, WO ... waist opening part.

Claims (7)

A paper diaper having a main body provided with a liquid-permeable top sheet and an absorbent core laminated on the back side of the top sheet, the back side of the main body being covered with an exterior sheet,
Both sides of the main body have the absorbent core, bend from the abdominal region to the crotch region, and bend toward the skin side along the wearer's groin,
Both bending, in the product state, the to 10~70mm protrude from the width direction center portion of the absorbent core, along with being carried out,
The exterior sheet is not bonded in the vicinity of the body portion and the bent portion, but is bonded in the width direction center side and the lateral side in the vicinity of the bent portion,
A space is provided between the portions opposed to each other by the bending, and the width of the space is enlarged toward the exterior sheet side,
The space between the portions facing each other by bending extends from the surface of the main body portion side of the outer sheet to the skin side of the wearer than the surface of the main body portion at the joint portion between the outer sheet and the main body portion. ing,
Paper diapers characterized by that.   The two bends are separated by 5 to 65 mm at the abdomen side end and 1 to 60 mm at the crotch side end, and this separation distance is more at the crotch side end than at the abdomen side end. The disposable diaper according to claim 1, wherein the disposable diaper is made to be 4 to 64 mm shorter. As the main body, provided with a liquid-impermeable back sheet laminated on the back side of the absorbent core,
The disposable diaper according to claim 1 or 2, wherein the vicinity of the bending line is bonded to each other among the portions of the back sheet that are opposed by the bending . As the main body, provided with a liquid-impermeable back sheet laminated on the back side of the absorbent core,
The disposable diaper according to claim 1 or 2, wherein an elastic elastic member extended in the direction of the bending line is fixed on a bending line formed by the bending of the back sheet. The absorbent core is formed of stacked fiber pulp to which a polymer absorbent polymer is added,
And in the vicinity of the bent portion, the basis weight of at least one of the polymer-absorbing polymer and the stacked fiber pulp is made larger than that in the other portion to be a high absorption performance portion. 5. The paper diaper according to any one of 4 above.   The separation distance between the joint portion on the center side in the width direction and the joint portion on the side side is shorter on the crotch side than on the abdomen side on the exterior sheet. The paper diaper according to any one of the above.   The disposable diaper according to any one of claims 1 to 6, wherein the absorbent core is not provided in a back region.

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