TW201740895A - Disposable diaper - Google Patents

Abstract

A standing gather (15) in a disposable diaper (1) includes: a base end part that cannot stand; and a standing part which can shrink in the length direction by means of an elastic member and can stand at the base end part toward the skin-facing side as observed in the thickness direction. The base end part has: first base end parts which are respectively arranged on both the outer sides relative to the standing part as observed in the length direction; and second base end parts each of which is arranged on the outer side relative to the standing part as observed in the width direction. The standing part has a bonding part (153) at which side sheets (14) are bonded to each other on the inner side relative to each of the second base end parts as observed in the width direction. The bonding part is provided in a rear side region (2). An absorbent material (11) in the rear side region (2) has a high-stiffness part (19).

Description

Disposable diapers

This invention relates to a disposable diaper.

Patent Document 1 discloses an absorbent core and an edge portion which are outside the widthwise direction of the absorbent core, and have no absorbent core and a disposable diaper. The three-dimensional folded edge of Patent Document 1 is fixed to both sides in the width direction than the absorbent core, and stands up toward the user side with the vicinity of the edge portion as a base point.

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2014-180346

The maximum height of the state in which the three-dimensional folded edge is raised is the distance between the fixed portion of the three-dimensional folded edge and the inner edge of the three-dimensional folded edge. The three-dimensional folded edge of Patent Document 1 is located more in the wide side direction than the absorbent core The outer side is so long that the distance between the fixed portion and the inner edge of the three-dimensional hemming becomes longer as compared with the structure in which the fixed portion is positioned on the absorbent core. Therefore, the height of the three-dimensional folded edge of Patent Document 1 tends to be high.

However, if the height of the three-dimensional hem is too high, the three-dimensional hem may collapse toward the outer side in the wide direction. In particular, if the three-dimensional folded side of the rear side region collapses toward the outer side in the wide side direction, a stool pocket for accommodating feces cannot be provided between the three-dimensional folded edge and the absorbent core, and feces leakage may occur.

Moreover, the distance between the fixed portion of the three-dimensional hem and the inner edge of the three-dimensional hem is too long, or the distance between the left and right three-dimensional hem is narrow, and if the inner edge of the three-dimensional hem of the rear side enters the wearer's sulcus, The three-dimensional folding edge does not easily cover the bulge of the buttocks, and there is a concern that the feces leak out.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a disposable diaper capable of suppressing leakage of feces by three-dimensional folding.

In order to solve the above problems, the disposable diaper (the disposable diaper 1) of the present invention has a longitudinal direction (longitudinal direction L) and a broad side direction (width) orthogonal to the longitudinal direction. The side direction W) and the thickness direction (thickness direction T) include a front side field (front side field 3) which is located on the front side more than the center of the longitudinal direction of the disposable diaper, and is discarded after use. The center of the longitudinal direction of the diaper is located further on the rear side of the rear side (rear side field 2); the front side field and the rear side field are a absorbing body (absorbent body 11) disposed; and a pair of three-dimensional hem (three-dimensional hem 15) having a sheet material (side sheet 14) and an elastic member (three-dimensional hem elastic member 155) and used in comparison with the foregoing The center of the wide-side direction of the disposable diaper (1WC in the widthwise direction of the disposable diaper) is disposed in the outer side of the wide-side direction, and the diaper is the same: The hem includes a base end portion that cannot be raised, and a erectable rising portion (rise portion 154) that is contracted in the longitudinal direction by the elastic member, and the base portion The end portion is a fulcrum that rises toward the skin side in the thickness direction, and the base end portion has a first base end portion (first base end) that is disposed at both outer edges of the longitudinal direction of the rising portion And a second base end portion (second base end portion 152) disposed at an outer edge of the rising portion in the width direction, wherein the rising portion has a thickness of the sheet member a joint portion (joining portion 153) having a length in the width direction of the rising portion, wherein the joint portion is disposed in the foregoing In the rear side region, the absorbent body in the rear side region has a high rigidity portion (high rigidity portion 19) which is more rigid than the absorbent body located at the center in the longitudinal direction of the disposable diaper.

1‧‧‧Disposable disposable diapers

2‧‧‧ Back side domain

3‧‧‧ front side domain

11‧‧‧Acceptor

14‧‧‧Side sheet (sheet material)

15‧‧‧Three-dimensional folding

151‧‧‧1st base end

152‧‧‧2nd base end

153‧‧‧ joints

154‧‧‧立起部

155‧‧‧Three-dimensional folded elastic members

1551‧‧‧Inside elastic member

18‧‧‧ lines

181‧‧‧1st convex top

182‧‧‧2nd convex top

183‧‧‧3rd convex top

184‧‧‧ Back side lines

185‧‧‧ front line

186‧‧‧Central line

19‧‧‧High rigidity department

1871‧‧‧1st gap

1872‧‧‧2nd gap

1873‧‧‧3rd gap

L‧‧‧Longside direction

T‧‧‧ thickness direction

T1‧‧‧ skin side

T2‧‧‧ non-skin side

W‧‧‧Broadside direction

Fig. 1 is a perspective view showing a disposable diaper of an embodiment.

Fig. 2 is a plan view of the disposable diaper in an unfolded state.

Fig. 3 is a plan view of a three-dimensional folded edge.

Fig. 4 is a cross-sectional view taken along the widthwise direction of the disposable diaper. (a) is a cross-sectional view based on the A-A line of Fig. 2, (b) is a cross-sectional view taken along line B-B of Fig. 2, and (c) is a cross-sectional view taken along line C-C of Fig. 2 .

Fig. 5 is a cross-sectional view in the longitudinal direction of the disposable diaper in a state of being worn by a wearer. (a) is a disposable diaper of the comparative example, and (b) is a disposable diaper of the embodiment.

Fig. 6 is a cross-sectional view in the widthwise direction of a rising portion along a three-dimensional folded edge. (a) is a disposable diaper of the comparative example, and (b) is a disposable diaper of the embodiment.

At least the following matters can be understood from the description of the present specification and the accompanying drawings.

A disposable diaper having a longitudinal direction, a widthwise direction orthogonal to the longitudinal direction, and a thickness direction, and having a position higher than a center of a longitudinal direction of the disposable diaper a front side field on the front side, and a rear side field located on the rear side of the center of the longitudinal direction of the disposable diaper, the absorbent body disposed across the front side field and the rear side field; and a pair A three-dimensional hem, which is a disposable diaper having a sheet material and an elastic member and disposed on both outer sides of the wide side direction than the center of the wide-side direction of the disposable diaper. : The aforementioned three-dimensional hem, is The base end portion that can not be raised and the erectable rising portion that is contracted in the longitudinal direction by the elastic member, and the base end portion as a fulcrum toward the thickness direction The skin end side is erected, and the base end portion has a first base end portion disposed at both outer edge edges of the rising portion in the longitudinal direction; and the wide side direction disposed in the rising portion a second base end portion of the outer side edge, wherein the rising portion is a joint portion that joins the sheet members and reduces a length in a width direction of the rising portion, and the joint portion is disposed in the rear side region The absorber in the rear side region has a high rigidity portion which is more rigid than the absorber in the center in the longitudinal direction of the disposable diaper.

According to such a disposable diaper, the rising portion of the three-dimensional hem is raised toward the wearer side with the first base end portion and the second base end portion as a base point. In the cross section along the width direction, the rising portion of the three-dimensional folded edge is raised with the second base end portion as a base point. The maximum height of the state in which the three-dimensional folded edge is raised is the distance between the second base end portion and the inner edge of the three-dimensional folded edge.

A joint portion is disposed in the three-dimensional folded edge of the rear side region. The portion where the joint portion is disposed is shorter than the portion where the joint portion is not disposed, and the distance between the second base end portion and the inner edge of the three-dimensional hemming portion is shortened. The distance between the second base end portion and the inner edge of the three-dimensional hemming edge is relatively short, and it is easy to maintain the tension between the elastic member and the second base end portion of the three-dimensional hemming and the elastic member and the first base end portion of the three-dimensional folded portion. When the tension is applied, the inner edge of the three-dimensional folded edge collapses toward the outer side in the wide side direction and is not easily spread. Therefore, it is easy to set the three-dimensional folding The resulting fecal pocket can inhibit the leakage of excrement. In addition, since the first proximal end portion is located on the inner side in the widthwise direction than the second proximal end portion, the inner edge of the three-dimensional folded portion is pulled by the first proximal end portion, and is easily collapsed toward the inner side in the widthwise direction. Therefore, it is easy to form a fecal pocket.

Further, since the rigidity of the absorber in the rear side region is relatively high, even if the elastic member disposed on the waistline is subjected to the force from the both legs toward the inner side in the wide direction in the wearing direction, it is easy to rebound with respect to the wide side direction. The three-dimensional folded edge does not easily enter the inner side of the wide side direction. Since the left and right three-dimensional folded edges are less likely to enter the inner side in the wide side direction, the three-dimensional folded edges can be disposed at appropriate positions such as the ridges covering the buttocks. Since the left and right three-dimensional folded edges are less likely to enter the inner side in the wide side direction, when the three-dimensional folded edges enter the inner side, the inner edge of the three-dimensional folded edges can be prevented from collapsing toward the outer side in the wide side direction. The three-dimensional hemming can be set at an appropriate position in the broad side direction, and the leakage of the feces can be suppressed by the three-dimensional hemming.

According to such a disposable diaper, it is preferable that the first base end portion located in the rear side region and the joint portion are opened.

According to such a disposable diaper, the joint portion is not provided between the first base end portion of the rear side region and the joint portion, and the distance between the second base end portion and the inner edge of the three-dimensional flap is relatively long. In the area where the joint portion is not provided, the pocket formed by the three-dimensional hem can be formed largely, and the space for accommodating the feces can be broadly ensured.

According to the disposable diaper according to the above aspect, the joint portion is disposed in the front side region, The ratio of the length in the longitudinal direction of the joint portion to the length in the longitudinal direction of the rising portion in the rear side region is larger than the length in the longitudinal direction of the joint portion with respect to the front side in the front side region. The ratio of the length of the starting portion is higher as desired.

According to such a disposable diaper, the ratio of the area of the joint portion in the rising portion in which the rear side region is disposed is higher than the ratio of the region in which the joint portion in the rising portion of the front side region is disposed. Therefore, in the rear side region, the ratio of the region which is relatively easy to be low is large, and the height of the rising portion is easily suppressed. When the height of the three-dimensional folded edge of the rear side region is excessively increased, it is possible to suppress the collapse of the three-dimensional folded edge which is excessively raised by the inner edge of the three-dimensional folded edge toward the outer side in the widthwise direction.

Moreover, the shape of the wearer's leg circumference and waist circumference is generally more bulging than the front side. Since the height of the three-dimensional hem can be effectively suppressed on the rear side of the center of the long-side direction of the disposable diaper after use, it is possible to suppress the three-dimensional hem from hitting the buttocks and the like toward the outer side in the wide direction when worn. Or enter the inside of the wide side. In particular, in the rear side region, it is possible to suppress the collapse of the three-dimensional folded side toward the outer side in the widthwise direction, or to arrange the three-dimensional folded edge so as to cover the bulge of the buttocks, thereby suppressing the leakage of the excrement.

On the other hand, in the front side field, the height of the three-dimensional hemming edge is ensured compared with the rear side field. The excretion discharged to the anterior domain is mainly urine, and is highly fluid compared with feces. When a large amount of urination cannot be absorbed immediately, a relatively high three-dimensional hem serves as a breakwater.

According to the disposable diaper according to the above aspect, the joint portion is the long side of the disposable diaper The center of the direction is separated from each of the first base end portions, and a distance between the first base end portion of the rear side region and a rear end edge of the joint portion is smaller than the first base end of the front side region. It is desirable that the distance between the portion and the front end edge of the joint portion is shorter.

According to such a disposable diaper, the center of the longitudinal direction of the disposable diaper is disposed by the joint portion, and the erect portion of the center of the disposable diaper in the longitudinal direction is used. The distance between the base end portions of 2 is shortened, and the outer side toward the wide side direction is pulled. Therefore, the tension of the elastic member at the center in the longitudinal direction of the disposable diaper is easily maintained at a high state. The rising portion at the center in the longitudinal direction of the disposable diaper is pulled by the first base end portion, and it is easy to maintain the state in which the inner side in the wide direction is collapsed. Moreover, the height of the rising portion at the center in the longitudinal direction of the disposable diaper is suppressed, and it is possible to more effectively suppress the collapse of the outer side in the widthwise direction.

In addition, the rising portion at the center in the longitudinal direction of the disposable diaper is pulled by the second base end portion and pulled outward in the widthwise direction. Therefore, it is easy to maintain the state in which the three-dimensional hem is raised toward the wearer side, and it is possible to widen the left and right three-dimensional hem. Further, the joint portion in the rear side region is closer to the first base end portion than the joint portion of the front side region. It is easier to exert the effect of suppressing the height of the three-dimensional hemming in the rear side region and causing the three-dimensional hemming to collapse toward the inner side in the wide side direction. The rising portion of the three-dimensional folded portion of the rear side is pulled up by the second proximal end portion, and is pulled sideways by the first proximal end portion, and is slightly collapsed toward the inner side in the width direction. Therefore, a space for accommodating feces is formed between the three-dimensional hem and the absorbent body, and is disposed in a three-dimensional folding between the feces and the skin. It prevents the direct contact of the stool with the skin.

According to the disposable diaper, the elastic member is disposed at a plurality of distances apart from the wide side direction, and the inner elastic member having the innermost position in the widthwise direction has an elongation ratio higher than that of the inner elastic member. The elongation of the elastic member on the outer side which is more in the wide side direction is higher as desired.

According to such a disposable diaper, a plurality of elastic members are disposed at a distance apart from each other in the width direction, and a portion which is contracted by the elastic member has a certain length in the width direction and is formed into a planar shape. Since the portion contracted by the elastic member has a planar shape, it is easy to ensure the length in the width direction of the feces pocket. Moreover, since the portion which is contracted by the elastic member has a planar shape, it is possible to alleviate the contact with the skin as compared with the structure in which one elastic member contracts.

Further, the inner elastic member has a longer distance from the second proximal end portion than the other elastic members, and is less likely to be pulled by the second proximal end portion. However, since the elongation of the inner elastic member is higher than that of the other elastic members, the deflection of the inner elastic member is suppressed, and the fecal pocket is more easily formed.

According to the disposable diaper, the high-rigidity portion is provided so as to extend from the center side in the longitudinal direction of the disposable diaper toward the rear side, and from the inner side in the width direction a pair of rear side lines extending outward in the widthwise direction, and the back side line is provided with a concave surface on the skin side of the absorbent body It is desirable that the mouth is provided with a portion to be pressed on the non-skin side than the notch.

According to such a disposable diaper, the absorber of the rear side region has high rigidity because it has a rear side line. Further, since the rear side line extends from the center side in the longitudinal direction of the disposable diaper toward the rear side and extends from the inner side in the wide side direction toward the outer side in the wide side direction, the outer side is applied from the wide side direction. When the force is directed to the inner side in the widthwise direction, the action of the support rod is exerted, and the deformation of the absorber in the widthwise direction can be suppressed. Therefore, it is easy to arrange the absorber along the bulge of the wearer's buttocks. By arranging the absorbent body so as to cover the bulge of the buttocks, the three-dimensional hem can be easily arranged along the bulge of the buttocks, and the three-dimensional hem can be placed at a more appropriate position, and the leakage of the excrement can be prevented by the three-dimensional hem. .

According to the disposable diaper according to the present invention, a pair of lines are provided on both side portions of the absorbent body in the width direction, and the pair of lines include the rear side line, and the line is in the foregoing The skin side of the absorbent body is provided with a notch, and a portion which is pressed in a state other than the notch on the non-skin side is provided, and the line has a convex top which protrudes toward the inner side in the wide side direction, and the rear side line, It is desirable that the convex top portion is the outer side in the width direction as the starting point, and a curved shape extending toward the rear side or curved outward in the wide side direction is desirable.

According to such a disposable diaper, wherein A pair of lines are provided on both sides of the wide side of the absorbent body, and the line is provided with a notch on the skin side of the absorbent body, and is provided on the non-skin side of the absorbent body. In the portion in which the pair is pressed, the pair of lines have a convex top that protrudes toward the inner side in the wide side direction, and an outer side that is convex toward the front side from the convex top, and extends toward the rear side. A curved rear side line curved in a straight line or outward in the width direction is desirable.

According to such a disposable diaper, the absorber of the rear side region has high rigidity because it has a rear side line. Further, the line is a straight line extending toward the rear side of the disposable disposable diaper in the longitudinal direction, or a curved rear side curved toward the outside, with the convex top as the starting point toward the outer side in the wide side direction. line. Since the rear side line extends toward the rear side in the widthwise direction, the rear side line expands toward the outer side in the widthwise direction from the squat of the wearer toward the buttocks side so as to cover the buttocks. Therefore, it is easy to arrange the absorber along the bulge of the wearer's buttocks. By arranging the absorbent body so as to cover the bulge of the buttocks, the three-dimensional hem can be easily arranged along the bulge of the buttocks, and the three-dimensional hem can be placed at a more appropriate position, and the leakage of the excrement can be prevented by the three-dimensional hem. .

===Absorbent article of the present embodiment ===

Next, an embodiment of the disposable diaper 1 of the present invention will be described with reference to the drawings. In addition, in the description of the following drawings, The same or similar symbols are indicated in the same or similar parts. However, the figure is a schematic, and it is necessary to pay attention to the case where the ratio of each size is different from the actual one. Therefore, the specific dimensions and the like must be judged by referring to the following description. Further, even if the drawings face each other, they may include portions having different dimensional relationships and ratios.

(1) The overall schematic structure of disposable disposable diapers

Fig. 1 is a perspective view showing a disposable diaper of an embodiment. Figure 2 is a top plan view of the disposable diaper in an unfolded state. Figure 3 is a plan view of a three-dimensional folded edge. Figure 4 is a cross-sectional view along the widthwise direction of the disposable diaper. The plan view shown in FIG. 2 and the plan view shown in FIG. 3 are such that the elastic member such as the three-dimensional hemming elastic member 155 is extended to the top sheet 12, the side sheet 14, the three-dimensional flap 15, and the like of the disposable diaper. A diagram of an extended state in a state in which wrinkles are not formed.

The disposable diaper 1 has a longitudinal direction L, a widthwise direction W orthogonal to the longitudinal direction L, and a thickness direction T. The longitudinal direction L is a direction in which the front outer casing 30 disposed on the abdomen side of the wearer and the rear outer casing 20 disposed on the back side of the wearer are connected. The thickness direction T is a direction in which the skin side T1 which is a direction in which the wearer is contacted and the non-skin side T2 on the opposite side are connected.

The disposable diaper 1 has a rear side field 2 which is located on the rear side more than the center 1LC of the longitudinal direction of the disposable diaper, and a center 1LC which is longer than the longitudinal direction of the disposable diaper. Front side field 3 of the front side. The disposable diaper 1 is a so-called 3-component type, and has There are 3 parts. The disposable diaper 1 has an absorbent body which is a first component that abuts on the wearer's intertidal portion to absorb excrement and the rear outer casing 20, which is covered as a second component. The back side portion of the user and the front outer casing 30 are the third side members that cover the front side of the wearer.

As shown in FIG. 4, the absorbent body 10 has at least an absorbent body 11, a top sheet 12, a back sheet 13, and a side sheet 14. The absorbent body 11 is an absorbent core 11a which is suitably configured using a known member such as pulverized pulp or a highly absorbent polymer. The absorbent core 11a is wrapped by the core cladding 11b. The configuration of the absorber 11 will be described in detail later.

The liquid-permeable top sheet 12 is provided on the surface side (skin side) of the absorber 11. The top sheet 12 is a skin surface side covering the absorbent body 11. The outer edge of the top sheet 12 extends outward from the absorber 11 in the widthwise direction. A back sheet 13 having liquid impermeability is provided on the non-skin side of the absorbent body 11. The side sheets 14 are respectively provided on the outer edge (outer end in the width direction) of the absorber 11. The side sheet 14 covers the outer edge of the absorber 11, and extends outward in the width direction of the absorber 11. The inner edge of the side sheet is disposed on the absorber 11. The side sheet 14 which is extended toward the outer side in the width direction of the absorbent body 11 is folded toward the non-skin side at a base point on the outer side in the width direction of the outer edge of the absorbent body 11. A part of the side sheet 14 which is folded toward the non-skin side is disposed on the non-skin side of the absorbent body 11.

The absorbent body 10 has a three-dimensional folded edge 15 and leg gathers Side 16. The three-dimensional folded edge 15 has a side sheet 14 as a sheet material and a three-dimensional hemming elastic member 155 as an elastic member. The three-dimensional folded edge 15 is disposed in a pair on the outer side in the width direction of the center of the width direction of the disposable diaper 1WC. Further, the three-dimensional hemming may be constituted by a sheet material different from the side sheet 14. The three-dimensional hemming 15 will be described in detail later.

The leg hem 16 is disposed in a pair on both outer sides in the width direction than the three-dimensional folded edge 15. The leg hem 16 has a non-woven sheet 161, a film sheet 162, and a leg gather elastic member 163. The nonwoven fabric sheet 161 is folded in the widthwise direction on the outer side edge of the absorbent body 10 and is laminated in two layers. A film sheet 162 is disposed between the nonwoven fabric sheets 161. A leg gather elastic member 163 is disposed between the non-woven fabric sheet on the non-skin side and the film sheet 162 in the two-layer non-woven fabric sheet. The leg gather elastic member 163 is composed of a thread rubber, and six leg hem 16 are disposed on each of the left and right legs. The leg gather elastic members 163 are expandable and contractible in the longitudinal direction, and are disposed at intervals in the width direction.

As shown in FIG. 2, the rear outer casing 20 has at least a rear side sheet 21 and a rear side elastic member 22. The rear side sheet 21 is formed of a non-woven fabric, and at least two layers are laminated. The rear side elastic member 22 is disposed between the rear side sheets 21 and is expandable and contractible in the broad side direction. As shown in FIG. 2, the front outer casing 30 has at least a front side sheet 31 and a front side elastic member 32. The front side sheet 31 is formed of a non-woven fabric, and at least two layers are laminated. The front side elastic member 32 is disposed between the front side sheets 31 and is expandable and contractible in the widthwise direction.

In the unfolded state shown in FIG. 2, the rear outer casing 20 and the front outer casing 30 are arranged in parallel with each other in the longitudinal direction, and the absorbent is laid between the rear outer casing 20 and the front outer casing 30. Body 10. The front end edge of the absorbent body is fixed to the front outer casing 30, and the rear end edge of the absorbent body is fixed to the rear outer casing 20. The disposable diaper is folded in half from the center 1LC of the longitudinal direction of the disposable diaper 1 in the state shown in Fig. 2 as a folding base point. In the state in which the disposable diaper is folded in half, the outer edge of the rear outer casing 20 as the outer edge of the rear side region and the outer edge of the front outer casing 30 as the outer edge of the front side region are joined. The pants type shown in Fig. 1 is formed.

(2) three-dimensional folding

Next, the three-dimensional hemming 15 will be described in detail. FIG. 3 is a plan view schematically showing a plane of the three-dimensional folded edge 15. The three-dimensional folded edge 15 is a wrinkle that can be raised toward the wearer's side when worn. The pair of three-dimensional hem 15 is line symmetrical with respect to the center of the width direction of the disposable diaper 1WC. Since the configurations of the three-dimensional folded edges 15 are the same, the single three-dimensional folded edges 15 will be described below. The three-dimensional folded edge 15 is formed on the outer edge of the absorbent body 11 to form a wall that rises toward the skin side, and prevents side leakage of the excrement, and is covered from the outer edge of the absorbent body 11 toward the inner side in the widthwise direction, and the absorbent body 11 A pocket for containing excrement is formed between them.

The three-dimensional folded edge 15 includes: a base end portion that cannot be raised, and a rising portion 154 that is raised by a three-dimensional folded edge The member 155 is contracted in the longitudinal direction and stands up toward the skin side in the thickness direction with the base end as a fulcrum. The front end edge of the three-dimensional hemming edge is the front end edge of the side sheet, and the rear end edge of the three-dimensional hemming edge is the rear end edge of the side sheet. The base end portion has a first base end portion 151 and a second base end portion 152. Fig. 4 (a) is a cross-sectional view taken along line A-A of Fig. 2 along the widthwise direction of the disposable diaper. Fig. 4 (b) is a cross-sectional view taken along line B-B of Fig. 2 along the widthwise direction of the disposable diaper. Fig. 4 (c) is a cross-sectional view taken along line C-C of Fig. 2 along the widthwise direction of the disposable diaper. 4(a) is a cross-sectional view of the front side field, and FIGS. 4(b) and 4(c) are cross-sectional views of the rear side field.

The first base end portion 151 is disposed at both end edges in the longitudinal direction of the rising portion 154. The pair of first base end portions 151 which are separated in the longitudinal direction are disposed so as to sandwich the rising portion 154 in the longitudinal direction. One of the first base end portions 151 is disposed in the rear outer casing 20 , and the other first base end portion 151 is disposed in the front outer casing 30 . The first proximal end portion 151 of the present embodiment is a portion where the side sheet 14 and the top sheet 12 are joined to the skin side of the absorbent body. The inner end edge (the inner end in the longitudinal direction) of each of the first proximal end portions 151 is a portion that becomes a base point at which the rising portion 154 rises.

The first base end portion 151 is located on the inner side in the width direction of the second base end portion 152. The inner edge 15WI of the three-dimensional flange 15 is pulled by the first base end portion 151, and is easily collapsed toward the inner side in the width direction. The width 151W of the first base end portion 151 may be shorter than the full width 154W of the rising portion, or may be the same as the full width 154W of the rising portion. The width 151W of the first base end portion 151 is the same as the full width 154W of the rising portion, so that the three-dimensional folded The inner side of the inner edge is more likely to collapse toward the inner side in the widthwise direction.

The second proximal end portion 152 is a portion that is formed so as not to be erected in a region extending outward from the rising portion in the widthwise direction, and is disposed on a non-skin side of the absorbent body 11. The second proximal end portion 152 is disposed adjacent to the outer edge of the rising portion 154. At the second base end portion 152, the side sheet 14 and the absorber 11 are joined via the joint portion R2. The outer edge 152WE of the second proximal end portion 152 is a portion corresponding to the outer edge of the absorber 11, and is a portion of the base point where the rising portion 154 rises.

In addition, the side sheet 14 and the top sheet 12 may be joined via the joint portion R2 in a region outside the rising portion in the width direction. The joint portion is located on the skin side of the absorbent body, and the joint portion constitutes a second base end portion. Further, the second proximal end portion 152 may be located outside the absorbent body 11 in the widthwise direction, or may be superposed on the absorbent body 11.

Further, the side sheet 14 is extended outward in the width direction from the outer edge of the absorber, and a portion extending outward in the width direction is laminated. In this way, since the side sheets are folded on the outer side in the width direction of the outer edge of the absorbent body, the size of the three-dimensional folded sides in the width direction can be greatly formed. Further, since the side sheet is folded on the outer side in the widthwise direction than the outer edge of the absorbent body, the area on the skin side covering the absorbent body can be reduced by the side sheet, and the absorption performance can be easily maintained.

The rising portion 154 is located on the inner side in the longitudinal direction of the first proximal end portion 151 and is located on the inner side in the widthwise direction of the second proximal end portion 152. The rising portion 154 includes an inner edge (inside edge of the side sheet 14) 15IE of the three-dimensional folded edge 15. The rising portion 154 is such that the side sheet 14 is not fixed at A portion such as a top sheet or the like is a portion that can be formed upright toward the skin side. The length of the rising portion in the width direction is the distance between the second base end portion and the inner edge of the three-dimensional folded edge, and is the maximum height at which the three-dimensional folded edge can stand up. The distance between the second base end portion and the inner edge of the three-dimensional folded portion is a state in which the outer edge of the second base end portion is expanded toward the outer side in the widthwise direction, and the state in which the wrinkles of the three-dimensional folded edge are invisible is extended. The distance between the outer edge of the second base end portion and the inner edge of the three-dimensional hemming.

The rising portion 154 has a joint portion 153 that engages the side sheets as the sheet material. The joint portion 153 is a portion that joins the side sheets 14 and shortens the length in the width direction of the rising portion. The length in the width direction of the rising portion 154 is the length in the width direction W of the rising portion 154 in the extended state shown in FIG. 3 (the second base end portion 152 and the inner edge of the three-dimensional folded portion 15) The height of the standing portion 154 is raised in a state where the rising portion 154 is contracted as shown in FIG. 4 and is raised toward the wearer side.

The joint portion 153 is a portion joined by, for example, an adhesive, heat fusion, or ultrasonic welding. 4(b) is a cross-sectional view of a region in which the joint portion 153 is provided. The joint portion 153 is a portion that joins the side sheets 14 that are folded at two points and that are overlapped by the creases FL1 extending in the longitudinal direction. As shown in FIG. 4(b), the joint portion 153 is disposed on the outer side with respect to the space between the three-dimensional hemming 15 and the absorber 11. The distance between the second base end portion 152 in the region where the joint portion 153 is provided and the inner edge of the three-dimensional flange 15 is the distance between the second base end portion 152 and the inner edge of the three-dimensional flange portion 15 in the region where the joint portion 153 is not provided. The distance is short. Therefore, in the region where the joint portion 153 is provided, the height of the three-dimensional folded edge can be suppressed. Section shown in Figure 4(b) The rising portion in the surface is in a state of being more lying than the rising portion in the cross section shown in FIG. 4(a) and the rising portion in the cross section shown in FIG. 4(c), and the height is suppressed.

Since the distance between the second proximal end portion 152 and the inner edge of the three-dimensional folded portion 15 is relatively short, it is easy to maintain the tension between the three-dimensional folded elastic member 155 and the second proximal end portion 152 and the three-dimensional folded elastic member 155 and the first When the tension between the base end portions 151 is applied, the inner edge of the three-dimensional folded edge 15 collapses toward the outer side in the widthwise direction and is not easily spread. Thereby, it is easy to provide the feces pocket by the three-folded side 15, and it can suppress the leakage of excrement.

The joint portion 153 is disposed at least in the rear side domain 2. Since the joint portion 153 is disposed in the rear side region 2, it is easy to form a pocket for storing feces in the rear side region 2. Feces do not easily touch the wearer's skin, which enhances the sense of wear. Further, the joint portion 153 of the present embodiment is the center of the longitudinal direction of the disposable diaper. That is, the joint portion 153 is disposed on both the front side domain 3 and the rear side domain 2. Since the joint portion 153 is disposed on both the front side field 3 and the rear side field 2, it is easy to form a pocket for accommodating the excrement in both the front side field 3 and the rear side field 2.

Moreover, the height of the rising portion 154 at the center in the longitudinal direction of the disposable diaper is suppressed, and the outer side in the widthwise direction can be more effectively suppressed from collapsing. Fig. 5 is a schematic cross-sectional view showing a wearing state in a cross section taken along the line X-X shown in Fig. 2 . Fig. 5(a) shows a disposable disposable diaper of a comparative example having no joint portion, and Fig. 5(b) shows a disposable disposable diaper having an embodiment of a joint portion. The portion enclosed by the two-dot chain line in Fig. 5(b) is a portion where the height is suppressed by the joint portion. By versa The center of the long-side direction of the disposable diaper is provided with a joint portion, and the height of the three-dimensional hem can be suppressed in the center of the longitudinal direction of the disposable diaper. Since the height of the three-dimensional hemming of the center of the longitudinal direction of the disposable diaper is relatively low, it is possible to suppress the inner edge of the three-dimensional hem from entering the inner side in the wide side direction, and it is easy to cover the wearer. The underarms are configured.

Moreover, the center of the longitudinal direction of the disposable diaper is disposed by the joint portion 153, and the rising portion 154 at the center in the longitudinal direction of the disposable diaper is opposite to the second base end portion 152. The distance is shortened, and the outer side is pulled toward the wide side. Therefore, the tension of the three-dimensional hemming elastic member 155 located at the center of the longitudinal direction of the disposable diaper is easily maintained at a high state. The rising portion 154 at the center in the longitudinal direction of the disposable diaper is pulled toward the first base end portion 151, and it is easy to maintain the state in which the inner side in the wide direction is collapsed. In addition, the rising portion 154 at the center in the longitudinal direction of the disposable diaper is pulled toward the second base end portion 152 and pulled outward in the widthwise direction. Therefore, it is easy to maintain the state in which the three-dimensional folded edge 15 is raised toward the wearer side, and the left and right three-dimensional folded edges 15 can be widened.

The length L1 of the three-dimensional hem of the rear side field 2 in the longitudinal direction is shorter than the length L2 of the three-dimensional hem 15 of the front side field 3 in the longitudinal direction. According to such a configuration, the three-dimensional folded edge of the rear side region 2 and the front side region 3 are more likely to exhibit the effect of collapse of the inner side in the widthwise direction due to the first base end portion 151. The rising portion in the cross section shown in Fig. 4(c) is in a state of being more lying than the rising portion in the cross section shown in Fig. 4(a), and the height can be suppressed.

The front end edge of the joint portion 153 is opposite to the front side field 3 The first base end portion 151 is separated and is located further rearward than the first base end portion 151 located in the front side field 3. The distance between the first proximal end portion 151 of the front side field 3 and the joint portion 153 is such that the distance between the second proximal end portion 152 and the inner edge of the three-dimensional folded portion 15 is relatively long. In the region where the joint portion 153 is not provided, the pocket formed by the three-dimensional folded edge 15 can be greatly formed, and the storage space of the pocket can be broadly ensured. The rear end edge of the joint portion 153 is separated from the first base end portion 151 located in the rear side region 2, and is located further forward than the first base end portion 151 located in the rear side region 2. Between the first base end portion 151 of the rear side field 2 and the joint portion 153, the distance between the second base end portion 152 and the inner edge of the three-dimensional folded portion 15 is relatively long. In the region where the joint portion 153 is not provided, the pocket formed by the three-dimensional folded edge 15 can be greatly formed, and the storage space of the pocket can be broadly ensured.

The length L3 of the joint portion 153 in the longitudinal direction is longer than the distance L6 between the joint portion 153 and the first base end portion 151 of the rear side region 2, and is larger than the joint portion 153 and the first base located in the front side region 3. The distance L7 of the end portion 151 is shorter.

The length L4 of the longitudinal direction L of the joint portion 153 of the rear side region 2 is longer than the length L5 of the longitudinal direction L of the joint portion 153 of the front side region 3. The length of the joint portion 153 located in the rear side field 2 is the distance between the rear end edge of the joint portion 153 and the center of the longitudinal direction of the disposable diaper. The length of the joint portion 153 located in the front side field 3 is the distance between the front end edge of the joint portion 153 and the center of the longitudinal direction of the disposable diaper. Since the length of the joint portion 153 positioned in the rear side field 2 is longer than the length of the joint portion 153 positioned in the front side field 3, it is possible to effectively suppress the height change of the three-dimensional folded edge 15 of the rear side field 2 from being suppressed. High situation, can further inhibit stereo The collapse of the three-dimensional folded edge 15 caused by the inner edge of the folded edge 15 being excessively raised.

The distance L6 between the first base end portion 151 of the rear side field 2 and the rear end edge of the joint portion 153 is shorter than the distance L7 between the first base end portion 151 of the front side field 3 and the front end edge of the joint portion 153. The joint portion 153 in the rear side region 2 is closer to the first base end portion 151 than the joint portion 153 of the front side region 3. In the rear side region 2, it is easier to exhibit the effect of suppressing the height of the three-dimensional folded edge 15 and causing the three-dimensional folded edge 15 to collapse toward the inner side in the wide side direction.

The ratio of the length L4 of the joint portion 153 to the length L8 of the rising portion 154 in the rear side field 2 is higher than the ratio of the length L5 of the joint portion 153 to the length L9 of the rising portion 154 in the front side field 3. . The length L8 of the rising portion 154 in the rear side field 2 means the distance between the first base end portion 151 of the rear side field 2 and the center of the longitudinal direction of the disposable diaper, and is The length of the area where the side field 2 can stand. Similarly, the length of the rising portion 154 in the front side field 3 means the distance between the first base end portion 151 of the front side field 3 and the center of the long-side direction of the disposable diaper, and is in the front side field. 3 The length of the area that can be raised.

The ratio of the area of the joint portion 153 in the rising portion 154 in which the rear side field 2 is disposed is higher than the ratio of the area in which the joint portion 153 in the rising portion 154 of the front side field 3 is disposed. Therefore, the rear side field 2 has a large ratio of the area which is relatively easy to be lowered, and the height of the rising portion 154 is easily suppressed. When the height of the three-dimensional folded edge 15 of the rear side region 2 is excessively increased, the collapse of the three-dimensional folded edge 15 caused by the excessive rising of the inner edge of the three-dimensional folded edge 15 can be further suppressed. Therefore, the left and right three-dimensional folded edges 15 can be widely disposed in the rear side region.

On the other hand, in the front side field 3, the height of the three-dimensional hemming 15 can be ensured as compared with the rear side field 2. The excretion discharged in the front side field 3 is mainly urine, and the fluidity is high. When a large amount of urination cannot be absorbed immediately, a relatively high three-dimensional hem acts as a breakwater, and leakage of excrement in the front side field 3 can be suppressed.

Further, the ratio of the length in the longitudinal direction of the joint portion of the three-dimensional hemming to the region in which the joint portion is not provided (the distance between the first base end portion and the joint portion) is desirable in satisfying the following Expressions 1 and 2. By satisfying the formula 1, a space is provided between the three-dimensional hemming edge and the absorber at the side of the rear side, and the absorber can be covered by the three-dimensional hemming. Moreover, by satisfying Formula 2, the three-dimensional folded edges can be easily raised.

(Formula 1)

(Length length L10 in the longitudinal direction of the first proximal end portion of the rear side region + length L4 in the longitudinal direction of the joint portion in the rear side region)> Distance L6 of the first proximal end portion of the rear side region and the joint portion (Length length L10 in the longitudinal direction of the first proximal end portion of the rear side region + length L4 in the longitudinal direction of the joint portion in the rear side region)

(Formula 2)

The distance L7 between the first proximal end portion of the front side region and the joint portion (the length L11 in the longitudinal direction of the first proximal end portion of the front side region + the length L5 in the longitudinal direction of the joint portion of the front side region)

The three-dimensional hemming elastic member 155 is constructed of silk rubber The three-dimensional hemming elastic member 155 is disposed in each of the left and right three-dimensional folded edges 15 . The three-dimensional hemming elastic members 155 are expandable and contractible in the longitudinal direction, and are disposed at intervals in the width direction. Fig. 6 is a view schematically showing a cross section in a width direction of a region in which a three-dimensional hemming elastic member is provided. Fig. 6(a) shows a comparative example in which the three-dimensional folded elastic members are one, and Fig. 6(b) shows the three-dimensional folded edges in the embodiment.

A plurality of three-dimensional hemming elastic members 155 are disposed at a distance apart from each other in the broad side direction, and a portion which is contracted by the three-dimensional hemming elastic member 155 has a certain length in the width direction and is formed into a planar shape. More specifically, by having a plurality of three-dimensional hemming elastic members 155, the entire region in which the plurality of three-dimensional hemming elastic members 155 are disposed is contracted in the longitudinal direction, and a plurality of three-dimensional hemming elastic members 155 are disposed. The region as a whole is pushed toward the wearer side, and the portion that is contracted by the three-dimensional hemming elastic member 155 is formed into a planar shape. Since the portion that is contracted by the three-dimensional hemming elastic member 155 has a planar shape, it is easy to ensure the length of the feces pocket in the width direction. Moreover, since the portion which is contracted by the three-dimensional hemming elastic member 155 has a planar shape, it is possible to alleviate the contact with the skin as compared with the contraction structure of the one-dimensional hemming elastic member 155.

The inner elastic member 1551 which is the inner side of the three-dimensional folded elastic member 155 which is most located in the width direction is located at the inner edge of the three-dimensional folded edge 15. The elongation of the inner elastic member 1551 is higher than the elongation of the three-dimensional hemming elastic member 155 which is located outside the widthwise direction of the inner elastic member 1551. The inner elastic member 1551 is compared with the other elastic members constituting the three-dimensional hemming elastic member 155 with respect to the second base end portion 152. The distance is long and is not easily pulled by the second base end portion 152. However, since the elongation of the inner elastic member 1551 is higher than that of the other three-dimensional heel elastic members 155, the deflection of the inner elastic member 1551 is suppressed, and the fecal pocket is more easily formed.

(3) absorber

Next, the absorber 11 will be described in detail. A pair of lines 18 are provided in the absorber 11. The line 18 may be formed only on the absorbent core 11a, or may be formed on both the absorbent core 11a and the core cladding 11b. The line 18 is provided in a pair on both sides in the width direction of the absorber 11. The line 18 is line-symmetric with respect to the center of the width direction of the disposable diaper 1WC. Since the structures of the lines 18 on both sides are the same, in the following, the lines of one side will be described.

In the line 18, a notch is provided on the skin side of the absorbent body, and a portion which is pressed on the non-skin side than the notch is provided. Specifically, the lines are formed by embossing. As shown in FIG. 2, the line 18 has a first convex top 181, a second convex top 182, a third convex top 183, a rear side line 184, a front side line 185, and a center line 186. The first convex top portion 181 is an apex portion that protrudes inward in the width direction. The first convex top portion 181 is located between the rear side line 184 and the center line 186, and is located further behind the center of the long-side direction of the disposable diaper or the center of the long-side direction of the disposable diaper. . A joint portion 153 is provided on a straight line that passes through the first convex top portion 181 and extends in the width direction. The absorber 11 is an area extending from the first convex top 181 toward the rear side, The rear side line 184 is deformed into a shape that broadly covers the buttocks. Since the joint portion 153 is provided in a region that is broadly covering the shape of the buttocks, the three-dimensional flap 15 is easily raised in the region covering the buttocks, and leakage of excrement can be suppressed.

The rear side line 184 is a starting point from the first convex top portion 181 and extends from the first convex top portion 181 toward the rear side. The end point (rear edge) of the back side line 184 coincides with the outer edge of the absorbent core. The rear end edge of the rear side line 184 is located on the front side more than the rear side outer casing. The rear side line 184 extends from the center side in the longitudinal direction of the disposable diaper toward the rear side, and extends from the inner side in the wide side direction toward the outer side in the wide side direction. The outer edge of the rear side line is located on the outer edge of the absorbent core. Since the rear side line 184 extends from the center side in the longitudinal direction of the disposable diaper toward the rear side and extends from the inner side in the wide side direction toward the outer side in the wide side direction, the outer side is widened from the wide side direction. When the force on the inner side in the side direction is exerted, the action of the support rod is exerted, and the deformation of the absorber 11 in the widthwise direction can be suppressed. Therefore, it is easy to arrange the absorber 11 along the bulge of the buttocks of the wearer. By arranging the absorbent body 11 so as to cover the bulge of the buttocks, the three-dimensional hem 15 is also easily disposed along the ridge of the buttocks, and the three-dimensional hem 15 can be disposed at a more appropriate position, and the three-dimensional hem 15 can be prevented. Leakage of excrement.

Moreover, the shape of the rear side line 184 in a plan view is a straight line extending toward the rear side of the disposable diaper in the longitudinal direction, with the first convex top portion 181 as the starting point in the width direction. Or a curve that curves outward. Because it extends toward the outer side in the widthwise direction and toward the rear side, the ridge from the wearer's armpit to the buttocks side covers the buttocks toward the wide side. The outer side of the direction is enlarged. Therefore, it is easy to arrange the absorber 11 along the bulge of the buttocks of the wearer. By arranging the absorbent body 11 so as to cover the bulge of the buttocks, the three-dimensional hem 15 is also easily disposed along the ridge of the buttocks, and the three-dimensional hem 15 can be disposed at a more appropriate position, and the three-dimensional hem 15 can be prevented. Leakage of excrement.

The second convex top portion 182 is an apex portion that protrudes toward the inner side in the width direction. The second convex top portion 182 is located between the front side line 185 and the center line 186 and is located forward in the center of the longitudinal direction of the disposable diaper. The inner edge of the second convex top portion 182 is located outside the inner edge of the first convex top portion 181 in the widthwise direction. The second convex top portion 182 is located further on the rear side than the front outer casing.

The front side line 185 is a starting point from the second convex top 182 and extends from the second convex top 182 toward the front side. The end point (front end edge) of the front side line 185 coincides with the outer edge of the absorbent core. The front end edge of the front side line 185 is located in a region overlapping the front outer casing. The front side line 185 extends toward the front side from the center side in the longitudinal direction of the disposable diaper, and extends outward from the inner side in the wide side direction toward the outer side in the wide side direction. The outer edge of the front side line 185 is located outside the outer side edge of the rear side line 184 in the widthwise direction.

The third convex top portion 183 is an apex portion that protrudes toward the inner side in the width direction. The third convex top portion 183 is located between the first convex top portion 181 and the second convex top portion 182, and is located further forward than the center of the longitudinal direction of the disposable diaper. The inner edge of the third convex top portion 183 is located outside the inner edge of the first convex top portion 181 in the widthwise direction. Therefore, the width of the absorber 11 is the most position at the position of the first convex top 181 in the longitudinal direction. narrow.

The center line 186 is a line connecting the front side line 185 and the back side line 184. In the central portion of the center line 186 in the longitudinal direction, the third convex top portion 183 is located there. The center line 186 has a line that is convex outward in the width direction between the first convex top 181 and the third convex top 183, and a line that is oriented in the width direction between the second convex top 182 and the third convex top 183. Outer convex lines.

A notch 187 is provided on the outer edge of the absorber 11. The notch 187 has a first notch 1871, a second notch 1872, and a third notch 1873. The position of the first notch 1871 corresponds to the position of the first convex top 181 in the longitudinal direction. The position of the second notch 1872 corresponds to the position of the second convex top 182 in the longitudinal direction. The position of the third notch 1873 corresponds to the position of the third convex top 183 in the longitudinal direction.

The absorber 11 of the rear side field 2 has a high rigidity portion 19. The high-rigidity portion 19 is a portion that is more rigid than the absorber having the center 1LC in the longitudinal direction of the disposable diaper. This rigidity is an index of the deformation difficulty of the absorber. Specifically, the high-rigidity portion 19 is, for example, a portion having a longer width than the width of the absorbent body 11 in the longitudinal direction center 1LC of the disposable diaper, and is located at the center of the longitudinal direction of the discarded disposable diaper. The portion of the absorbent body 11 of the 1LC having a higher basis weight is located at the center of the longitudinal direction of the disposable diaper 1LC, and the shape of the absorbent body 11 is different from that of the line and has a high rigidity.

Since the rear side region 2 has the high rigidity portion 19, the three-dimensional folded edge 15 on the right and left side regions 2 is less likely to enter the inner side in the widthwise direction. Because left and right Since the three-dimensional folded edge 15 does not easily enter the inner side in the wide side direction, the three-dimensional folded edge 15 can be disposed at an appropriate position such as the bulge covering the buttocks. Since the left and right three-dimensional hem 15 does not easily enter the inner side in the width direction, when the three-dimensional hem 15 enters the inner side, the inner edge of the three-dimensional hem 15 can be prevented from collapsing outward in the widthwise direction. The three-dimensional hemming 15 can be disposed at an appropriate position in the wide-side direction, and the leakage of the feces can be suppressed by the three-dimensional hemming 15.

The width of the absorbent core 11a of the rear side domain is longer than the width of the absorbent core 11a which is located at the center 1LC of the longitudinal direction of the disposable diaper. Further, the rigidity of the absorber 11 in the rear side region 2 may be higher than the rigidity of the absorber 11 in the front side region 3. The width of the absorbent core 11a of the rear side domain may also be longer than the width of the absorbent core 11a of the front side domain. Specifically, the width W2 of the absorbent core in the rear side region shown in FIG. 4(b) and the width W3 of the absorbent core in the rear side region shown in FIG. 4(c) are larger than those shown in FIG. 4(a). The width W1 of the absorbent core of the rear side domain is longer. Therefore, the rigidity of the absorbent core 11a of the rear side domain is higher than that of the absorbent core 11a of the front side domain. Further, the width W3 of the absorbent core in the rear side region shown in Fig. 4(c) is longer than the width W2 of the absorbent core in the rear side region shown in Fig. 4(b). The width of the absorbent core 11a of the rear side field 2 is lengthened toward the rear.

The high-rigidity portion 19 of the rear side region 2 of the present embodiment is a region wider than the width of the absorber 11 located at the center 1LC of the longitudinal direction of the disposable diaper, and has a rear side line 184. In Fig. 2, the high rigidity portion 19 is indicated by oblique lines. The front end edge of the high-rigidity portion 19 is located further rearward than the center of the long-side direction of the disposable diaper, and is more than the joint The rear end edge of the portion 153 is located further forward. The rear end edge of the high rigidity portion 19 is located further forward than the rear outer casing and is located rearward than the rear end edge of the joint portion 153.

Since the high rigidity portion 19 is wider than the width of the absorber 11 located at the center 1LC of the longitudinal direction of the disposable diaper, it is less likely to be deformed when the force is applied from the outer side in the width direction to the inner side in the width direction. Further, the width of the rear side line 184 of the rear side field 2 is longer than the width of the center line 186 of the center 1LC of the longitudinal direction of the disposable diaper. Therefore, the rear side region 2 is not easily deformed when a force from the outer side in the wide side direction toward the inner side in the wide side direction is applied. Since the width of the absorber 11 is relatively wide and the width of the line extending outward in the width direction is relatively wide, the high rigidity portion 19 is less likely to be deformed when a force is applied from the outer side in the width direction to the inner side in the width direction.

The high rigidity portion 19 may also be configured to have higher rigidity than at least a portion of the front side field 3 . The rigidity of the absorber in the rear side region is higher than the rigidity of the absorber in the front side region, and particularly in the back side region, the shrinkage of the three-dimensional hemming can be suppressed, and the pocket containing the feces can effectively suppress the excrement. leakage. Further, the high rigidity portion 19 may be disposed in the entirety of the rear side region 2 or may be disposed in a part of the rear side region 2. Further, the front side region 3 may be provided with a high rigidity portion which is more rigid than the absorber 11 located at the center 1LC of the longitudinal direction of the disposable diaper. Even in the front side field 3, when the force toward the inner side in the wide side direction is applied from the outer side in the wide side direction, it is less likely to be deformed, and a three-dimensional folded edge can be provided at an appropriate position in the wide side direction.

The rigidity of the absorber 11 can be performed according to the following method measuring. An absorbent body having a size of 18 mm × 40 mm was used as a test sample. The measurement was performed using a digital force gauge stand (manufactured by Nippon Denshoku Co., Ltd., FGP-5). The front end of the measuring connector is in the shape of a straight line. The test sample is placed on the measuring platform of the digital side force gauge bracket. At this time, the front end of the measuring connector of the digital side force gauge is parallel with respect to the 18 mm side, and the test sample configuration is performed with the front end of the measuring connector being located at the center of the test sample. Push the test sample into the measuring connector. The pushing speed is 1.5mm/s. The maximum intensity at the time of pushing is set to the rigidity value.

In addition, the high-rigidity portion 19 having a structure in which the absorbent body 11 of the longitudinal direction center 1LC of the disposable diaper is not provided with a line (central line) is 1LC longer than the center of the long-side direction of the disposable diaper. The absorber 11 may have a longer length in the widthwise direction. The high-rigidity portion 19 may be configured to be less deformable when the force is applied from the outer side in the widthwise direction toward the inner side in the widthwise direction than the absorbent body 11 located at the center 1LC of the longitudinal direction of the disposable diaper.

(4) Other embodiments

The joint portion may be disposed without the center in the longitudinal direction of the disposable diaper, as long as it is disposed at least in the rear side region. The shape of the joint portion in plan view is not limited to a rectangular shape extending in the longitudinal direction, and may be a dot shape that is spaced apart in the longitudinal direction. The joint portion has a dot shape, and a space between the joint portions can be widened to form a receiving space due to the three-dimensional hemming, and a storage space for the excrement can be widely provided.

As described above, the above embodiment is used to In the detailed description, the invention is obviously not limited to the embodiments described in the specification. The present invention is intended to be modified and modified without departing from the scope of the invention. Therefore, the description of the specification is intended to be illustrative, and is not intended to limit the invention.

In addition, the entire contents of Japanese Patent Application No. 2016-35664, filed on Feb. 26, 2016, which is the priority of the priority of the present disclosure, are hereby incorporated by reference.

[Industrial availability]

According to the present invention, it is possible to provide an absorbent article which improves the fit to the wearer's buttocks and suppresses leakage of excrement.

1‧‧‧Disposable disposable diapers

2‧‧‧ Back side domain

3‧‧‧ front side domain

10‧‧‧Absorbable ontology

11‧‧‧Acceptor

11a‧‧‧Absorbent core

11b‧‧‧ core cladding

15‧‧‧Three-dimensional folding

16‧‧‧ leg hem

18‧‧‧ lines

19‧‧‧High rigidity department

20‧‧‧Back side outer body

21‧‧‧Back side sheet

22‧‧‧Back side elastic members

30‧‧‧ Front side outer body

31‧‧‧ front side sheet

32‧‧‧ Front side elastic members

181‧‧‧1st convex top

182‧‧‧2nd convex top

183‧‧‧3rd convex top

184‧‧‧ Back side lines

185‧‧‧ front line

186‧‧‧Central line

187‧‧ ‧ gap

1871‧‧‧1st gap

1872‧‧‧2nd gap

1873‧‧‧3rd gap

L‧‧‧Longside direction

W‧‧‧Broadside direction

Claims (5)

A disposable diaper having a longitudinal direction, a widthwise direction orthogonal to the longitudinal direction, and a thickness direction, and having a center on the front side of the center of the longitudinal direction of the disposable diaper a front side field, and a rear side field located on the rear side of the center of the longitudinal direction of the disposable disposable diaper; an absorbent body disposed across the front side field and the rear side field; and a pair of three-dimensional folded edges It is a disposable diaper having a sheet material and an elastic member and disposed on both outer sides in the width direction of the front side of the disposable diaper, and is characterized in that: The hem is a base end portion that cannot be erected, and a erectable erecting portion that is contracted in the longitudinal direction by the elastic member, with the base end portion as a fulcrum The skin end side in the thickness direction is raised, and the base end portion has a first base end portion that is disposed at both outer end edges of the rising portion in the longitudinal direction, and a base end portion that is disposed in the rising portion Outside the wide side direction a second base end portion of the side edge, wherein the rising portion is a joint portion that joins the sheets and reduces a length in a width direction of the rising portion, and the joint portion is disposed on the rear side and the front side The absorbent body of the rear side region has a high rigidity portion which is more rigid than the absorbent body located at the center of the longitudinal direction of the disposable diaper. In the high-rigidity portion, a pair of rear portions extending from the inner side in the longitudinal direction of the disposable diaper toward the rear side and extending outward from the inner side in the wide side direction are provided. In the side line, the back side line is provided with a notch on the skin side of the absorbent body, and a portion in a state where the skin is pressed on the non-skin side than the notch, and the length of the joint portion in the longitudinal direction The ratio of the length in the longitudinal direction of the rising portion in the rear side region is higher than the ratio of the length in the longitudinal direction of the joint portion to the length of the rising portion in the front side region. The disposable diaper according to the first aspect of the invention, wherein the first base end portion and the joint portion are opened in the rear side region. The disposable diaper according to the first or second aspect of the invention, wherein the joint portion is a center of the longitudinal direction of the disposable diaper, and the first base end portion The distance between the first base end portion of the rear side region and the rear end edge of the joint portion is greater than a distance between the first base end portion of the front side region and the front end edge of the joint portion. The distance is shorter. The disposable diaper according to the first or second aspect of the patent application, wherein the elastic member is separated by a plurality of distances in the broad side direction The elongation of the inner leg elastic member that is disposed on the inner side in the wide side direction is higher than the elastic member on the outer side in the width direction of the inner elastic member. The disposable diaper according to claim 1 or 2, wherein a pair of lines are provided on both side portions of the absorbent body in the width direction, and the pair of lines include the foregoing The side line is a portion having a notch on the skin side of the absorbent body, and a portion which is pressed on the non-skin side than the notch, and the line has an inner side in the wide side direction. In the protruding convex top portion, the rear side line is curved in a straight line extending toward the rear side or curved outward in the wide side direction, with the convex top portion as the starting point in the outer side in the wide side direction.