WO2017199932A1

WO2017199932A1 - Underpants-type disposable diaper

Info

Publication number: WO2017199932A1
Application number: PCT/JP2017/018286
Authority: WO
Inventors: 祐介川上; 貴仁永井; 純子園田
Original assignee: ユニ・チャーム株式会社
Priority date: 2016-05-16
Filing date: 2017-05-16
Publication date: 2017-11-23

Abstract

An underpants-type disposable diaper (1001) equipped with an absorbent main body (1010), an abdomen-side waistline portion (1003), and a back-side waistline portion (1004), wherein an outer material (1020) is provided on the non-skin side of the absorbent main body (1010), a leakage-preventing wall (1050) is provided on both sides of the absorbent main body (1010) in the lateral direction, the leakage-preventing wall (1050) has a joining portion (1061) where the surfaces on one side in the thickness direction are joined and a non-joining portion (1062) where the surfaces in the thickness direction are not joined, and the protrusion level (W21) of the outer material (1020) from the outermost end (1010e) of the absorbent main body (1010) in the lateral direction is less than the protrusion level (W50) of the leakage-preventing wall (1050) from the outermost end (1010e) at the position (P20) that serves as the minimum when the outer material (1020) and the leakage-preventing wall (1050) are extended outward in the lateral direction so that the lateral length of the outer material (1020) and leakage-preventing wall (1050) reaches a maximum.

Description

Pants-type disposable diapers

The present invention relates to a pants-type disposable diaper.

Conventionally, as disposable diapers, those provided with a leak-proof wall for preventing side leakage of excrement are known. For example, Patent Document 1 discloses a main body having a front part applied to the abdomen of the wearer, an intermediate part in which both lateral parts are applied to the thigh, and a rear part applied to the back side. A diaper provided with a pair of leak-proof walls (a leak-proof cuff) is disclosed.

The main body has a top sheet directed toward the liquid receiving side of the wearer (wearer), a back sheet directed outward, and an absorbent core sandwiched between the top sheet and the back sheet and slightly smaller than both sheets. It is configured by stacking. In the developed state of the diaper, the top sheet and the back sheet are bound inward in the lateral direction at the intermediate portion and have an hourglass shape. The pair of leak-proof walls are disposed on the liquid receiving side of the main body with a space therebetween in the lateral direction, and are disposed on the inner side in the lateral direction with respect to the lateral ends of the top sheet and the back sheet.

JP 2005-218876 A

In the diaper described in Patent Document 1, a leak-proof wall is disposed inward of the lateral direction from the lateral ends of the top sheet and the back sheet in the intermediate portion, that is, the leak-proof wall is the top sheet and the lateral wall in the lateral direction. It does not protrude outward from the backsheet. For this reason, when it is a pants-type diaper, when the wearer peeks from the waistline opening to check the opening around the leg at the time of wearing, it is difficult for the wearer to visually recognize the opening around the leg due to the leakage prevention wall. If you try to pass a leg through a diaper, the leg will be easily caught on the leak-proof wall, and it will be difficult to pass the leg.

This invention is made | formed in view of the above problems, The place made into the objective provides the underpants type disposable diaper which a wearer can pass a leg easily, suppressing the leakage of excrement. There is.

The main invention for achieving the above-mentioned object is that the absorbent body has a longitudinal direction and a transverse direction intersecting the longitudinal direction, and absorbs excrement, and one end side in the longitudinal direction of the absorbent body is joined. And the abdomen waistline part located on the abdomen side of the wearer when worn and the other end side in the longitudinal direction of the absorbent main body are joined, and the dorsal side located on the dorsal side of the wearer when worn A pants-type disposable diaper provided with a waistline portion, wherein an exterior sheet is provided on the non-skin side of the absorbent main body, and the longitudinal direction is provided on both sides of the absorbent main body in the lateral direction. A leak-proof wall is provided along the surface, and the leak-proof wall has at least one side surface in the thickness direction at a position where the length in the lateral direction of the exterior sheet is minimum in the longitudinal direction. Having a joined part, in the longitudinal direction The region in the upper side of the joint portion has a non-joint portion in which the surfaces in the thickness direction are not joined to each other, and the lateral length of the exterior sheet and the lateral length of the leak-proof wall When the exterior sheet and the leak-proof wall are extended outward in the lateral direction so that the maximum is the maximum, the position from the outermost end of the absorbent main body in the lateral direction is the minimum position. The pants-type disposable diaper is characterized in that a protruding amount of the exterior sheet to the outside is smaller than a protruding amount of the leakage preventing wall from the outermost end to the outside. Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

According to the present invention, it is easy for the wearer to pass the leg when wearing while suppressing the leakage of excrement.

It is a schematic perspective view which shows one structural example of the diaper which concerns on embodiment of this invention. It is the general | schematic top view which looked at the diaper of an expansion | deployment and the expansion | extension state from the wearer's skin side. It is the schematic plan view which showed the position of the joining area | region in the diaper of an expansion | deployment and the expansion | extension state. 4A is a schematic cross-sectional view taken along line AA in FIG. 2, FIG. 4B is a schematic cross-sectional view taken along line BB in FIG. 2, and FIG. 4C is a schematic cross-sectional view taken along line CC in FIG. It is a schematic plan view which shows the leak-proof wall of an unfolded and extended state, and an absorptive main body. It is the D section enlarged schematic diagram of FIG. FIG. 7A is a schematic plan view when the diaper is viewed from the ventral side, and FIG. 7B is a schematic plan view when the diaper is viewed from the back side. 8A to 8C show the minimum when the exterior body and the leak-proof wall are extended outward in the lateral direction so that the lateral length of the exterior body and the lateral length of the leak-proof wall are maximized. FIG. 8A is a diaper according to the present embodiment, FIG. 8B is a diaper according to another example, and FIG. 8C is a diaper according to another example. Shows the case. It is explanatory drawing explaining the wearing condition of a diaper. It is a top view of the diaper 2001 which is an unfolded and extended state. It is the schematic perspective view which looked at the diaper 2001 from the ventral side. 12A is a schematic cross-sectional view along AA in FIG. 12B is a schematic cross-sectional view taken along the line BB in FIG. 1A. 12C is a schematic cross-sectional view taken along the line CC in FIG. 1A. It is a schematic plan view for explaining the main body joint portion 2080. It is a top view of the leak-proof wall 2050 which is an unfolded and extended state. It is a schematic sectional drawing expanding and showing about field D of Drawing 12C. It is a figure explaining the wearing condition of the diaper 2001 before excretion is performed. It is a figure explaining the wearing condition of the diaper 2001 after excretion is performed. It is sectional drawing explaining the state of the non-joining part 2062 at the time of diaper 2001 wearing. FIG. 19A and FIG. 19B are cross-sectional views for explaining a diaper wearing state of a comparative example. It is a schematic sectional drawing of the diaper 2001 showing the state when the leak-proof wall 2050 and the back seat | sheet 2030 are extended | stretched so that the length of a horizontal direction may become the maximum. It is a schematic sectional drawing explaining the modification of the diaper 2001. It is a figure explaining arrangement | positioning of the end junction part 2063 and the main body junction part 2080 about the diaper 2 of the expansion | deployment and expansion | extension state. It is a schematic sectional drawing at the time of seeing the diaper 2 formed in the underpants type from the horizontal direction. It is a schematic sectional drawing explaining the diaper 2001 (diaper 2002) of the folded state.

At least the following matters will become clear from the description of this specification and the accompanying drawings.

An absorptive main body that has a longitudinal direction and a transverse direction that intersects the longitudinal direction, and absorbs excrement, and one end side in the longitudinal direction of the absorptive main body is joined, and when worn, the abdomen side of the wearer A pants-type disposable diaper comprising: a ventral waistline portion located on the back side; and a backside waistline portion positioned on the back side of the wearer when the other end side in the longitudinal direction of the absorbent main body is joined and worn And the exterior sheet is provided in the non-skin side of the absorptive main part, and the leak-proof wall along the longitudinal direction is provided in the both sides of the absorptive main part in the transverse direction, respectively. The leak-proof wall has a joining portion in which surfaces on one side in the thickness direction are joined to each other at a position where the length in the lateral direction of the exterior sheet is minimum in the longitudinal direction. In the region above the joint in the direction, the thickness The outer sheet and the outer sheet so that the lateral length of the exterior sheet and the lateral length of the leak-proof wall are maximized. When the leak-proof wall is extended outward in the lateral direction, at the minimum position, the amount of protrusion of the outer sheet from the outermost end of the absorbent main body in the lateral direction is the outermost amount. A pants-type disposable diaper that is less than the amount of protrusion from the end to the outside of the leakage barrier becomes apparent.

According to such a pants-type disposable diaper, since the leak-proof wall has the joint portion (pick portion), it is difficult to produce a gap between the skin of the wearer at the time of wearing, and The leak-proof wall, which is a part of the outer edge, protrudes outward in the lateral direction from the exterior sheet, so that when the diaper is worn, the wearer can easily see the opening around the leg and the leg is caught on the leak-proof wall. It becomes difficult. Thereby, when wearing, suppressing a leak of excrement, a wearer tends to pass a leg.

In such a pants-type disposable diaper, the lateral end of the abdominal waistline and the lateral end of the back waistline are engaged by the first locking portion along the longitudinal direction. The other end portion in the lateral direction of the abdominal waistline portion and the other end portion in the lateral direction of the dorsal waistline portion are locked by the second locking portion along the vertical direction. In the longitudinal direction, below the line connecting the lower end of the first locking part and the lower end of the second locking part, the ventral waist part in the joint part of the leak-proof wall It is desirable that the end on the side of is located.

According to such a pants-type disposable diaper, in the longitudinal direction, the joint is not located on the ventral waist part, that is, because the end of the joint does not reach the upper end of the belly side in the leg opening, When the leg is passed through the leg opening for wearing the diaper, a situation in which the fingertip of the leg is caught by the joint is suppressed, and the wearer can easily pass the leg.

In such a pants-type disposable diaper, the lateral end of the abdominal waistline and the lateral end of the back waistline are engaged by the first locking portion along the longitudinal direction. The other end portion in the lateral direction of the abdominal waistline portion and the other end portion in the lateral direction of the dorsal waistline portion are locked by the second locking portion along the vertical direction. In the longitudinal direction, the back waistline portion in the joint portion of the leak-proof wall below the line connecting the lower end of the first locking portion and the lower end of the second locking portion It is desirable that the end on the side of is located.

According to such a pants-type disposable diaper, in the vertical direction, the joint is not located on the back waistline, that is, the end of the joint does not reach the upper end on the back side in the leg opening, Since the joint portion having rigidity is less likely to bite into the wearer's buttocks and back and the non-joint portion having flexibility comes into contact with the skin, the touch becomes good and discomfort during wearing can be suppressed.

In such a pants-type disposable diaper, the leak-proof wall is folded inward from the outer side in the lateral direction, and a lower surface portion facing the skin side surface of the absorbent main body in the thickness direction, and the lateral direction A top surface portion that is bent from the inside to the outside and overlapped with the skin side surface of the lower surface portion, and at least on the side of the back waistline portion in the longitudinal direction of the leak-proof wall, the non-bonding The skin-side surface of the absorbent main body and the non-skin-side surface of the lower surface portion are joined in a region on the upper side in the longitudinal direction than the portion and in a region on the outer side in the lateral direction from the joint portion, And it is desirable that the skin side surface of the lower surface part and the non-skin side surface of the top surface part are joined.

According to such a pants-type disposable diaper, when the joint part having rigidity is provided up to the end on the back side, the joint part is further than the position where the collar part protrudes most (the apex part of the collar part). It is easy to shift inward and easy to bite in, but the back end in the longitudinal direction of the leak-proof wall is fixed to the absorbent main body outside the joint in the lateral direction, and the non-joint is directed from the inside to the outside Since it is provided so as to spread, the non-joint portion having flexibility fits to the heel portion outside the apex portion of the buttock portion, and can suppress inward displacement and biting. Moreover, it becomes easy for a non-joining part to maintain the cup shape along the shape of a wearer's buttocks, and the leakage of excrement can be suppressed.

In such a pants-type disposable diaper, the joint portion between the skin-side surface of the lower surface portion and the non-skin-side surface of the top surface portion is the horizontal distance from the laterally bent position from the inner side to the outer side. It is desirable to be spaced apart in the direction.

According to such a pants-type disposable diaper, since the rigid joint portion does not exist at the bent position, it is possible to reduce a sense of incongruity to the wearer's skin when the diaper is worn.

Such a pants-type disposable diaper has a joining region for joining the absorbent main body and the exterior sheet in the thickness direction, and the joining region has a width in the lateral direction of the absorbent main body. It is desirable to have a portion narrower than the width in the lateral direction at both ends in the longitudinal direction in the lower end region of the leak-proof wall in the longitudinal direction.

According to such a pants-type disposable diaper, the region (lower end region) in which the joint portion is provided is a region that is disposed in the crotch portion of the wearer when the diaper is worn, and in this region, the absorbent main body and the exterior By narrowing the width in the lateral direction in the joining area with the sheet, the absorbent main body and the exterior sheet are not joined in the vicinity of the leg opening. Thereby, the exterior sheet | seat which has a softness | flexibility becomes easy to crumble (a wrinkle becomes easier), and leg opening is easier to see.

In such a pants-type disposable diaper, on both sides of the absorbent main body in the lateral direction, a leak-proof wall is provided along the longitudinal direction, and the leak-proof wall is at least in the longitudinal direction. In the position where the lateral length of the exterior sheet is the smallest, it has a joint portion where the surfaces on one side in the thickness direction are joined together, and in the region above the joint portion in the longitudinal direction, It has a non-joining part where the surfaces in the thickness direction are not joined, and has a body joining part for joining the absorbent body to the exterior sheet, and at least the side of the body joining part at the minimum position The width in the direction is narrower than the width in the lateral direction of the main body joint at both longitudinal positions of the main body joint, and of the leak-proof wall, the non-skin side portion of the joint, and The joint is provided At least one of the portion located on the non-skin side of the portion are, having an elastic member along the longitudinal direction, it is desirable.

According to such a pants-type disposable diaper, when wearing, the width of the main body joining portion that joins the outer layer sheet in the vicinity of the wearer's crotch is narrow, so that the leakage prevention wall is raised by the rigidity of the outer layer sheet. The problem of being disturbed is less likely to occur. In addition, since the standing leak-proof wall is bent inward in the horizontal direction with the elastic member provided on the non-skin side of the joint part or the joint part as a base point, it is difficult to bend at parts other than the base point, and the leak-proof wall is in the middle of standing. Is suppressed from falling. Then, the leak-proof wall that is bent inward in the lateral direction at the base point of the bending is further folded back and overlapped in the lateral direction to form a flat surface (top surface portion), and the flat surface snaps onto the wearer's skin. By fitting, the fit at the time of wearing a diaper can be improved.

In such a pants-type disposable diaper, it is desirable that the elastic member is provided on the non-skin side of the joint and overlaps with the joint in the thickness direction.

According to such a pants-type disposable diaper, the shrinkage force due to the elastic member easily acts on the flat portion (top surface portion) of the leak-proof wall through the joint portion when worn, and the leak-proof wall maintains the surface shape. It becomes easy to fit a wearer's skin in the state. Further, in the region where the joint portion is formed, the joint portion serves as a base point for bending of the leak-proof wall, and in the region where the non-joint portion is formed, the elastic member serves as a base point for bending of the leak-proof wall. The closer the positions of the elastic member and the joint portion, the more difficult the position of the bent base point is shifted, and the easier it is to maintain the surface shape of the top surface portion.

In such a pants-type disposable diaper, a linear portion disposed along the lateral direction so as to overlap the absorbent main body in the thickness direction, and the lateral direction from both lateral ends of the linear portion And an elastic member having a curved portion arranged to bend toward the upper side in the longitudinal direction, and the joint portion and the elastic member overlap each other in the thickness direction. It is desirable to have a part to do.

According to such a pants-type disposable diaper, in the thickness direction, the joint portion has a portion overlapping with the elastic member, that is, when viewed in the thickness direction, the joint portion crosses the elastic member. Therefore, the joint portion is pulled up obliquely upward toward the outer side in the lateral direction along the shape of the wearer's buttocks by the elastic force of the curved portion of the elastic member. Thereby, it becomes difficult to produce a clearance gap between a junction part and a wearer's crotch part, and the leakage of excrement can be suppressed.

In such a pants-type disposable diaper, it is desirable that the expansion ratio of the curved portion is larger than the expansion ratio of the linear portion.

According to such a pants-type disposable diaper, since the expansion ratio of the curved portion is larger than that of the straight portion of the elastic member, the pulling force is increased obliquely upward toward the outer side in the lateral direction, and the joint portion and the wearable portion are worn. A gap is less likely to occur between the person's crotch part and leakage of excrement can be further suppressed.

In such a pants-type disposable diaper, the leak-proof wall is provided with a plurality of leg-around elastic members extending and contracting in the longitudinal direction in the lateral direction, and in the lateral direction, outside of the joint portion. It is desirable that the number of the leg-hole elastic members arranged in the upper side is larger than the number of the leg-hole elastic members arranged on the inner side of the joint and the joint.

According to such a pants-type disposable diaper, in the lateral direction of the leak-proof wall, a sheet member constituting the leak-proof wall is provided by arranging a lot of leg-hole elastic members having rigidity in a region outside the joint portion. It is difficult to turn or bend, and the leak-proof wall can be applied to the wearer's skin.

In such a pants-type disposable diaper, it is desirable that the leg-hole elastic member disposed outside the joint in the lateral direction is colored.

According to such a pants-type disposable diaper, in the lateral direction of the leak-proof wall, since the leg-hole elastic members arranged outside the joint are colored, these leg-hole elastic members stand out, When wearing a diaper, the leg opening is easily visible.

In such a pants-type disposable diaper, the absorbent main body has an absorbent core along the longitudinal direction, and the absorbent core is a constricted portion between one end and the other end in the longitudinal direction. In the thickness direction, the joint portion does not overlap with the absorbent core, and in the lateral direction, the distance between one joint portion and the other joint portion is the absorbent core. It is desirable that the length in the lateral direction at the one end and the length in the lateral direction at the other end of the absorbent core be shorter.

According to such a pants-type disposable diaper, since the joint portions are located in the space portions on both sides of the constricted portion of the absorbent core in the lateral direction, the rigid joint portion is pressed against the wearer's skin by the absorbent core. It becomes difficult to be worn, and the uncomfortable feeling when wearing a diaper can be suppressed.

=== First Embodiment ===
As an example of a pants-type disposable diaper according to the present invention (hereinafter simply referred to as a diaper 1001), a pants-type disposable diaper mainly intended for elderly people will be described.

(Overall configuration of diaper 1001)
First, the overall configuration of the diaper 1001 will be described with reference to FIGS. 1, 2, 3, and 4A to 4C.

FIG. 1 is a schematic perspective view showing a configuration example of the diaper 1001. FIG. 2 is a schematic plan view of the developed and extended diaper 1001 as viewed from the skin side of the wearer. FIG. 3 is a schematic plan view showing the position of the joining region 1007 in the unfolded and extended diaper 1001. 4A is a schematic cross-sectional view taken along line AA in FIG. 2, FIG. 4B is a schematic cross-sectional view taken along line BB in FIG. 2, and FIG. 4C is a schematic cross-sectional view taken along line CC in FIG.

The diaper 1001 has a “vertical direction” as shown in FIG. 1 and a “lateral direction” that intersects the vertical direction, and also has a “thickness direction” as shown in FIGS. 4A to 4C. Among the longitudinal directions, the wearer's torso side is the “upper side” and the wearer's inseam side is the “lower side”. Further, in a state where the wearer wears the diaper 1001, the side positioned on the wearer's belly side is simply referred to as “belly side”, and the side positioned on the wearer's back side is simply referred to as “back side”. The “thickness direction” is a direction in which the members constituting the diaper 1001 are stacked, and the side in contact with the skin of the wearer when the wearer wears the diaper 1001 is defined as “skin side”, and the opposite side. Is “non-skin side”. Hereinafter, the skin side in the thickness direction is simply referred to as “skin side”, and the non-skin side in the thickness direction is simply referred to as “non-skin side”.

As shown in FIG. 1, the diaper 1001 is provided with an abdomen waist part 1003 located on the abdomen side of the wearer, a dorsal waist part 1004 located on the back side of the wearer, and the inseam of the wearer. Crotch part 1005 located. As shown in FIGS. 2, 3 and 4A to 4C, the diaper 1001 includes a strip-shaped absorbent main body 1010 that absorbs excrement such as urine and an exterior sheet provided on the non-skin side of the absorbent main body 1010. The exterior body 1020 includes an abdominal waistline portion 1003, a back waistline portion 1004, and a crotch portion 1005.

As shown in FIGS. 2 and 3, in a state where the diaper 1001 is expanded and stretched, the absorbent main body 1010 has one end in the longitudinal direction joined to the ventral waist part 1003 and the other end in the longitudinal direction is the back side. It is joined to the waist part 1004. That is, the absorbent main body 1010 is provided so as to be bridged between the abdominal waistline portion 1003 and the dorsal waistline portion 1004. Further, the crotch part 1005 is disposed between the abdominal waistline part 1003 and the back side waistline part 1004.

Here, the “stretched state” of the diaper 1001 is a state in which each elastic member provided in the diaper 1001 is stretched to stretch the entire diaper 1001 (product), specifically, the diaper 1001 It means a state in which each member (for example, a sheet member constituting the abdominal waistline portion 1003 or the backside waistline portion 1004) is extended until the dimensions thereof coincide with or close to the dimensions of the member itself. .

The diaper 1001 has the absorbent main body 1010 and the exterior body 1020 in a folded position at a predetermined position CL10 (shown by a one-dot chain line in FIGS. 2 and 3) in the longitudinal direction of the absorbent main body 1010 from the unfolded state shown in FIGS. Is folded in half. In the two-folded state, one end portion in the lateral direction of the abdominal side waistline portion 1003 and one end portion in the lateral direction in the back side waistline portion 1004 are locked by the first locking portion 1101 along the longitudinal direction. The other end portion in the lateral direction of the ventral side waistline portion 1003 and the other end portion in the lateral direction of the back side waistline portion 1004 are locked by the second locking portion 1102 extending along the side. As a result, the abdomen waistline portion 1003 and the back waistline portion 1004 are connected in an annular shape to form one waistline opening 1001HB and a pair of leg hole openings 1001HL as shown in FIG. 1, thereby forming a pants-type diaper.

As shown in FIGS. 2 and 3, the first locking part 1101 includes an abdominal first locking region 1301 provided from the upper end to the lower end of the abdominal waist part 1003 and the upper end of the back side waist part 1004. To the back side first locking region 1401 provided over the lower end. Similarly, the second locking part 1102 is provided from the upper end to the lower end of the abdominal waist part 1003 and from the upper end to the lower end of the back side waist part 1004. The formed dorsal side second locking region 1402 is joined. As a joining means of the 1st locking part 1101 and the 2nd locking part 1102, welding etc. are mentioned, for example.

(Configuration of Absorbent Body 1010)
The absorptive main body 1010 has a substantially rectangular shape in plan view as shown in FIGS. 2 and 3 and is provided at the center in the lateral direction. The absorbent main body 1010 includes an absorbent core 1011 along the longitudinal direction, a top sheet 1012 disposed on the skin side of the absorbent core 1011, a back sheet 1013 disposed on the non-skin side of the absorbent core 1011, have. The top sheet 1012 and the back sheet 1013 are shown in FIGS. 4A to 4C.

The absorbent core 1011 is a member that absorbs and holds a liquid such as urine, and is formed of, for example, a liquid absorbent fiber such as a pulp fiber mixed with a super absorbent polymer (SAP). As shown in FIGS. 2 and 3, the absorbent core 1011 has a substantially hourglass shape in plan view, and has a constricted portion 1011 c between one end 1011 ea and the other end 1011 eb in the longitudinal direction. As can be seen by comparing FIG. 4B and FIG. 4C, the constricted portion 1011c is smaller in the lateral dimension than the lateral dimensions of the one end 1011ea and the other end 1011eb (W11ea, W11eb in FIG. 6). FIG. 4B schematically shows a cross section in the thickness direction of the abdominal waistline portion 1003 including the one end portion 1011ea of the absorbent core 1011 and the back side including the other end portion 1011eb of the absorbent core 1011. The same applies to the waistline portion 1004 side.

In this embodiment, the outer peripheral surface of the absorbent core 1011 is covered with a core wrap sheet 1110 made of a liquid-permeable sheet member such as tissue paper or nonwoven fabric, as shown in FIGS. 4B and 4C. Accordingly, in the region where the constricted portion 1011c is formed in the longitudinal direction of the absorbent main body 1010, compared to the one end 1011ea and the other end 1011eb, the lateral end of the absorbent core 1011 and the core wrap sheet 1110 in the lateral direction. The distance between is long. In FIG. 4B, the core wrap sheet 1110 is in contact with the lateral end of the absorbent core 1011 and the distance between the lateral end of the absorbent core 1011 and the lateral direction of the core wrap sheet 1110 is substantially 0 (zero). It is.

The top sheet 1012 is a liquid-permeable sheet member that can come into contact with the wearer's skin when worn, and is formed of, for example, a hydrophilic air-through nonwoven fabric or a spunbond nonwoven fabric. The back sheet 1013 is a liquid-impermeable sheet member for preventing liquid such as urine absorbed by the absorbent core 1011 from leaking to the outside, and is formed of, for example, a resin film.

Leakproof walls 1050 along the longitudinal direction are provided on both sides of the absorbent main body 1010 in the lateral direction. When the diaper 1001 is worn, the leak-proof wall 1050 stands up from the lateral side end of the absorbent main body 1010 toward the wearer's skin, and excrement leaks out from the diaper 1001 to the outside. It suppresses and constitutes a part of the outer edge of the leg opening 1001HL (see FIG. 1). A detailed configuration of the leak-proof wall 1050 will be described later.

(Configuration of exterior body 1020)
The exterior body 1020 is formed by stacking three sheet members, a first exterior sheet member 1021, an abdominal second exterior sheet member 1022a, and a back second exterior sheet member 1022b. The first exterior sheet member 1021, the ventral second exterior sheet member 1022a, and the back second exterior sheet member 1022b are each a flexible sheet member formed of, for example, a spunbond nonwoven fabric. In this embodiment, the exterior body 1020 as the exterior sheet is formed by laminating a plurality of sheet members, but is not necessarily a laminated body, and the exterior body 1020 is formed by a single sheet member. May be.

As shown in FIGS. 2 and 3, the first exterior sheet member 1021 is bound inward in the lateral direction in a region corresponding to the crotch portion 1005 and has a substantially hourglass shape in plan view. At the position where the first exterior sheet member 1021 is bound to the innermost side in the lateral direction, the lateral length of the entire exterior body 1020 is minimum, and is located between the wearer's crotch when the diaper 1001 is worn. In the following description, the position where the lateral length of the exterior body 1020 is minimum in the vertical direction of the diaper 1001 (shown by a one-dot chain line in FIGS. 2 and 3) is simply referred to as “minimum position P20”.

In addition, as for this minimum position P20, in the diaper 1001 of the underpants type, it is desirable to be located on the front side (abdominal side) and the upper side of the position CL10 which is the lower end in the vertical direction. Thereby, since the width | variety of the horizontal direction of the exterior body 1020 becomes large as it goes upwards on the back side rather than the position P20 which becomes the minimum, it can be covered with the exterior body 1020 so as to wrap the wearer's buttocks. In addition, when walking, the wearer will move the leg forward (abdominal side), so that the minimum position P20 is located on the front side of the position CL10 which is the lower end in the vertical direction, The wearer's thighs are less likely to rub against the crotch part 1005 of the diaper 1001, and the uncomfortable feeling during wearing can be reduced.

Further, as shown in FIGS. 2 and 3, the outer package 1020 has a minimum width in the horizontal direction at the position P20 where the outer package 1020 is minimum, that is, the outer package 1020 has a minimum width. In the position P20, it is desirable that the inner side of the absorbent main body 1010 is further bound inside. Accordingly, even when the leg opening 1001HL is looked into from the waist opening 1001HB, the exterior body 1020 is not visible at the minimum position P20, and the leakage preventing wall 1050 which is a part of the outer edge of the leg opening 1001HL. Can be visually recognized, so that the wearer can be given an impression that it is easy to pass through the legs.

Note that FIG. 4C is a schematic cross-sectional view when the diaper 1001 is cut in the thickness direction at the minimum position P20. As shown in FIGS. 4A to 4C, the first exterior sheet member 1021 is disposed on the non-skin side of the back sheet 1013 of the absorbent main body 1010. As shown in FIG. 3, the first exterior sheet member 1021 and the back sheet 1013 are joined to each other in the thickness direction in the joining region 1007. That is, the joining area | region 1007 has joined the absorptive main body 1010 and the exterior body 1020 to the thickness direction.

In the present embodiment, as shown in FIG. 3, the joining region 1007 includes a ventral joining region 1007 a that joins one end 1010 ea in the longitudinal direction of the absorbent main body 1010 and the ventral part of the exterior body 1020 in the thickness direction. The longitudinal side of the back-side joining region 1007b and the ventral-side joining region 1007a and the back-side joining region 1007b joining the other end 1010eb in the longitudinal direction of the absorbent main body 1010 and the back side portion of the exterior body 1020 in the thickness direction. And a central joint region 1007c disposed between the directions. The central joint region 1007c is disposed at a predetermined distance from the ventral joint region 1007a in the longitudinal direction, and is disposed at a predetermined distance from the back joint region 1007b. However, the joining region 1007 is not necessarily divided into a plurality of regions, and may be provided continuously from one end 1010ea in the longitudinal direction of the absorbent main body 1010 to the other end 1010eb. .

Further, as shown in FIG. 3, the central joint region 1007c has a portion in which the lateral width W7c is narrower than the lateral widths W7a and W7b in the ventral joint region 1007a and the back joint region 1007b. Details of this part will be described later.

As shown in FIG. 4B, the ventral second exterior sheet member 1022 a is disposed on the non-skin side of the first exterior sheet member 1021 on the ventral waistline portion 1003 side. As shown in FIG. 2, the ventral second exterior sheet member 1022a has a minimum position P20 in the vertical direction from the lower end 1301u of the ventral first locking region 1301 and the lower end 1302u of the ventral second locking region 1302. It is the shape which inclined so that the width | variety (length) of a horizontal direction may become narrow gradually as it goes to.

Between the thickness direction of the ventral second exterior sheet member 1022a and the first exterior sheet member 1021, a plurality of ventral waist elastic members 1031 along the lateral direction are provided at intervals in the vertical direction. The plurality of ventral waist elastic members 1031 can be made of, for example, rubber thread or the like, and the ventral second exterior sheet member 1022a and the first exterior sheet member 1021 are stretched in the lateral direction at a predetermined expansion ratio. It is sandwiched and joined. By these abdominal side waistline elastic members 1031, lateral stretchability is imparted to the abdominal side waistline part 1003.

The back side second exterior sheet member 1022b is disposed on the non-skin side of the first exterior sheet member 1021 on the back waistline portion 1004 side, as shown in FIG. 4A. As shown in FIG. 2, the back-side second exterior sheet member 1022b has a minimum position P20 in the vertical direction from the lower end 1401u of the back-side first locking region 1401 and the lower end 1402u of the back-side second locking region 1402. It is a shape curved toward the inner side in the horizontal direction and the lower side in the vertical direction so that the width (length) in the horizontal direction becomes gradually narrower as it goes to.

Between the thickness direction of the back side 2nd exterior sheet member 1022b and the 1st exterior sheet member 1021, the back side waistline elastic member 1041 along the horizontal direction is provided with two or more at intervals in the vertical direction. The plurality of back-side waistline elastic members 1041 can use, for example, rubber thread or the like. The back-side second exterior sheet member 1022b and the first exterior sheet member 1021 are stretched in the lateral direction at a predetermined stretch ratio. It is sandwiched and joined. The plurality of back waistline elastic members 1041 provide lateral stretchability to the back waistline portion 1004.

Here, “elongation magnification” indicates the degree of elongation when the natural length is 1 in an elastic member such as rubber thread. For example, in the case where the expansion magnification is 1.2, the elastic member Is extended from the natural length by 0.2.

Furthermore, a plurality of dorsal leg-hole elastic members 1042 are provided between the back side second exterior sheet member 1022b and the first exterior sheet member 1021 in the thickness direction with a space in the vertical direction. The plurality of dorsal leg elastic members 1042 include a straight portion 1421 disposed along the lateral direction so as to overlap the absorbent main body 1010 in the thickness direction, and laterally outward from both lateral ends of the linear portion 1421. And a curved portion 1422 that is curved toward the upper side in the vertical direction. The straight portion 1421 has a portion that overlaps with the absorbent core 1011 in the thickness direction. The straight portion 1421 and the curved portion 1422 are joined between the back-side second exterior sheet member 1022b and the first exterior sheet member 1021 in a state of being stretched at different stretching magnifications.

In this embodiment, the expansion ratio of the curved portion 1422 is larger than the expansion ratio of the linear portion 1421. The curved portion 1422 is disposed along the lateral outer edge of the back-side second exterior sheet member 1022b, but this region where the curved portion 1422 is disposed contacts the wearer's buttocks when the diaper 1001 is worn. For this reason, the wearer tends to cause a positional shift by moving the leg. Therefore, by making the expansion magnification of the bending portion 1422 larger than the expansion magnification of the linear portion 1421, the contraction force of the back leg elastic member 1042 in the bending portion 1422 can be strengthened, and the displacement can be made difficult to occur.

Further, the contraction force of the back leg elastic member 1042 at the curved portion 1422 increases the amount of contraction of the exterior body 1020 in the vicinity of the leg opening 1001HL, so that the exterior body 1020 has a cup along the roundness of the wearer's buttocks. It becomes easy to deform into a shape and can improve fit. Note that the expansion ratio of the bending portion 1422 is not necessarily constant in the horizontal direction, and the expansion ratio may be different depending on the position in the horizontal direction.

On the other hand, it is possible to prevent the absorbent core 1011 from being excessively contracted by making the expansion ratio of the linear portion 1421 having a portion overlapping with the absorbent core 1011 in the thickness direction smaller than the expansion ratio of the curved portion 1422. it can. Note that, similarly to the curved portion 1422, the expansion ratio of the linear portion 1421 is not necessarily constant in the horizontal direction, and the expansion ratio may be different depending on the position in the horizontal direction. For example, when the expansion ratio at the central portion in the horizontal direction of the straight portion 1421 is smaller than the expansion magnification at both end portions in the horizontal direction, the stress is gradient in the horizontal direction of the straight portion 1421, thereby impairing the fit. Therefore, excessive shrinkage of the absorbent core 1011 can be suppressed.

(Configuration and function of leak-proof wall 1050)
Next, the configuration and function of the leak-proof wall 1050 will be described with reference to FIGS. 5, 6, 8A to C, and 9 in addition to FIGS. 2, 3, and 4A to C. FIG.

FIG. 5 is a schematic plan view showing the leak-proof wall 1050 and the absorbent main body 1010 in an expanded and elongated state. FIG. 6 is an enlarged schematic view of a D part in FIG. 4C. 7A is a schematic plan view when the diaper 1001 is viewed from the ventral side, and FIG. 7B is a schematic plan view when the diaper 1001 is viewed from the back side. 8A to 8C, the exterior body 1020 and the leakage prevention wall 1050 are extended outward in the lateral direction so that the lateral length of the exterior body 1020 and the lateral length of the leakage prevention wall 1050 are maximized. 8A is a schematic cross-sectional view in the thickness direction at the minimum position P20 in the case, FIG. 8A is a diaper 1001 according to the present embodiment, FIG. 8B is a diaper according to another example, and FIG. The case of the diaper which concerns on another example is shown. FIG. 9 is an explanatory diagram for explaining a wearing state of the diaper 1001.

The leak-proof wall 1050 is formed by folding a rectangular sheet member 1050s as shown in FIG. 5 in the lateral direction along folding lines f1, f2, and f3 along the longitudinal direction. The sheet member 1050s is a flexible sheet member such as a nonwoven fabric.

The leak-proof wall 1050 is provided with a plurality of leg-hole elastic members 1055 extending and contracting in the longitudinal direction and arranged side by side in the lateral direction. In the present embodiment, as shown in FIG. 5, the six leg-hole elastic members 1055 are joined to the sheet member 1050 s (leak barrier 1050) in a state of being stretched at a predetermined stretch ratio in the longitudinal direction. . The plurality of leg-hole elastic members 1055 provide the leak-proof wall 1050 with stretchability along the longitudinal direction. In the following description, the six leg elastic members 1055 are divided into the first leg elastic member 1551, the second leg elastic member 1552, the third leg elastic member 1553, the fourth leg elastic member 1554, and the fifth leg elastic member 1055, respectively. The leg-hole elastic member 1555 and the sixth leg-hole elastic member 1556 may be described.

As shown in FIG. 5, the sheet member 1050 s (expanded and elongated leak-proof wall 1050) has a lateral outer end portion 1050 eo that protrudes laterally outward from the absorbent main body 1010. The inner end portion 1050ei is fixed to the lateral end portion of the absorbent main body 1010. Specifically, as shown in FIGS. 4A to 4C, the inner end portion 1050ei in the lateral direction of the sheet member 1050s is joined between the absorbent core 1011 and the back sheet 1013 in the thickness direction.

In the sheet member 1050s, first, the outer end portion 1050eo is bent inward in the lateral direction with the fold line f1 shown in FIG. 5 as a base point, and the first to sixth leg elastic members 1551 to 1556 are sandwiched therebetween. Thus, the sheet members 1050s are joined to each other in the thickness direction. As a result, the sheet member 1050s is in a two-layered state.

Subsequently, the sheet member 1050s in a stacked state is folded toward the non-skin side and the inner side in the thickness direction with respect to the folding line f2 and then in the thickness direction with respect to the folding line f3. Bend towards the skin side and laterally inside. As a result, as shown in FIGS. 4A to 4C and FIG. 6, a leak-proof wall 1050 is formed in which the cross section in the thickness direction is bent into a substantially S shape. As shown in FIG. 6, the position of the fold line f <b> 3 becomes a base portion 1050 rp when the leak-proof wall 1050 is erected. The leak-proof wall 1050 is not necessarily formed by two layers (multiple layers), but may be formed by a single layer as shown in the schematic diagrams of FIGS. 4A to 4C.

As shown in FIG. 6, the leak-proof wall 1050 formed by the above-described procedure is configured such that the sheet member 1050 s is bent from the lateral outer side to the inner side with the folding line f <b> 3 as a base point, and the skin side of the absorbent main body 1010 is The sheet member 1050s is bent from the inner side to the outer side in the lateral direction with the lower surface portion 1052 facing the surface (the surface on the skin side of the top sheet 1012) in the thickness direction and the fold line f2 as a base point. A top surface portion 1051 overlapped on the surface.

As shown in FIG. 6, the leak-proof wall 1050 is formed by joining the non-skin side surface 1051b of the top surface portion 1051 and the skin side surface 1052a of the bottom surface portion 1052, that is, one side in the thickness direction of the sheet member 1050s. It has the joining part 1061 by which these surfaces were joined. At this time, the sheet member 1050 s is picked so that the lateral end of the top surface part 1051 (the part including the first leg-hole elastic member 1551 in FIG. 5) faces the outside, and the thickness direction is in the picked part. The surfaces on one side of are joined. The joining portion 1061 is formed by using, for example, an adhesive means using an adhesive such as a hot melt adhesive, or a crimping means such as embossing.

Note that the joint portion 1061 does not necessarily have to join the entire non-skin-side surface 1051b of the top surface portion 1051 and the entire skin-side surface 1052a of the bottom surface portion 1052, and part of the top surface portion 1051 and the bottom surface portion 1052. In this area, the joint portion 1061 may be formed so as to join the non-skin side surface 1051b of the top surface portion 1051 and the skin side surface 1052a of the bottom surface portion 1052. For example, in the lateral direction, the joint portion 1061 may not be formed at the position of the inner end of the leak-proof wall 1050 (the position of the fold line f2 shown in FIG. 6). As shown in FIG. 6, the top surface portion 1051 and the bottom surface portion 1052 are not joined and can be detached in the laterally outer region where the joining portion 1061 is not formed.

As shown in FIG. 2, the joint portion 1061 is provided along the longitudinal direction in a region corresponding to the constricted portion 1011 c of the absorbent core 1011 in the longitudinal direction of the leak-proof wall 1050. The leakage preventing wall 1050 is joined to the region outside the joining portion 1061 in the longitudinal direction, that is, the region above the joining portion 1061 in the longitudinal direction of the diaper 1001 in the thickness direction of the sheet member 1050s. The non-joining portion 1062 is not provided.

In addition, what is necessary is just to have the junction part 1061 in the lower end area | region in the vertical direction of the leak-proof wall 1050 in other words, the center area | region in a longitudinal direction at least. The “lower end region” is a region including a position CL10 (see FIGS. 2 and 3) at the lower end in the vertical direction in the diaper 1001 in a pants-type state, and is positioned between the wearer's crotch when the diaper 1001 is worn. It is an area to do. In the present embodiment, the lower end region includes a minimum position P20 in addition to the lower end position CL10 in the vertical direction.

As shown in FIG. 9, when the diaper 1001 is worn, the top surface portion 1051 disposed on the most skin side of the leak-proof wall 1050 comes into contact with the wearer's body. Of the top surface portion 1051, the region where the joint portion 1061 is provided is joined in a state where the top surface portion 1051 and the bottom surface portion 1052 are stacked by the joint portion 1061, and thus compared with the region where the joint portion 1061 is not provided. And the rigidity is high. Thereby, in the area | region in which the said junction part 1061 was provided, since the leak-proof wall 1050 is hard to deform | transform and it can press and fit to a wearer's skin firmly, there is a clearance gap between a diaper 1001 and skin. It is difficult to occur, and it is possible to suppress the side leakage of excrement.

Moreover, as shown in FIG. 7A, when the diaper 1001 is viewed from the abdominal side (front side), specifically, the diaper 1001 in the product state taken out from the package is viewed from the non-skin side and the abdominal side (front side). In the lower end region 1050BA, at least a part of the leak-proof wall 1050 is exposed laterally from the exterior body 1020. As described above, the leakage prevention wall 1050 that is a part of the outer edge of the leg hole opening 1001HL protrudes outward from the exterior body 1020 in the lateral direction, so that the position of the leg hole opening 1001HL can be easily understood from the appearance. As described above, since the end of the leakage prevention wall 1050 faces the outside, when the leg opening 1001HL is viewed from the side, the edge of the leakage prevention wall 1050 faces the inside or the upper side. The size of the leg opening 1001HL appears larger than the appearance in comparison with the facing diaper. Thereby, the impression which is easy to let a leg pass can be given to a wearer etc.

On the other hand, as shown in FIG. 7B, when the diaper 1001 is viewed from the back side (rear side), specifically, the product diaper 1001 taken out of the package is viewed from the non-skin side and the back side (back side). Since the leak-proof wall 1050 is not exposed to the outside in the lateral direction than the exterior body 1020, it is hidden from the exterior body 1020 and cannot be seen. Thus, since the external appearance when the diaper 1001 is viewed from the ventral side is different from the external appearance when viewed from the back side, the wearer can easily recognize the front and back of the diaper 1001 when wearing the diaper 1001. Thus, it is possible to suppress wearing the wrong front and back. In addition, when the wearer visually recognizes the exterior body 1020 made of a soft sheet member, it is possible to give the wearer the impression that the buttock is wrapped round by the exterior body 1020, and to give a sense of security. Become.

In the present embodiment, the joint portion 1061 and the back leg elastic member 1042 have portions that overlap each other in the thickness direction. That is, when the unfolded diaper 1001 is viewed in the thickness direction, the joint portion 1061 intersects the back leg elastic member 1042 (straight line portion 1421), and therefore the elastic force of the back leg elastic member 1042 Due to (elastic force in the curved portion 1422), the joint portion 1061 is pulled upward obliquely upward in the lateral direction so as to follow the shape of the buttocks of the wearer. Therefore, a gap is less likely to occur between the joint 1061 and the wearer's skin (at the crotch). As described above, the joining portion 1061 in which the expansion ratio of the curved portion 1422 is larger than the expansion ratio of the linear portion 1421 is more desirable because it is pulled upward more obliquely upward in the lateral direction.

And since the non-joining part 1062 is provided in the area | region above the junction part 1061 in the vertical direction, in a crotch part, a wearer is suppressing the leakage of excrement by the junction part 1061 as mentioned above. Since the non-joining part 1062 which has a softness | flexibility contacts the skin in the abdominal side waistline part and back side waistline part, discomfort and discomfort at the time of wear can be suppressed.

Further, as shown in FIG. 8A, the exterior body 1020 and the leakage prevention wall 1050 are moved outward in the lateral direction so that the lateral length of the exterior body 1020 and the lateral length of the leakage prevention wall 1050 are maximized. At the position P20 that is the minimum when extended, the amount of protrusion W21 from the outermost end 1010e of the absorbent main body 1010 to the outside of the exterior body 1020 (first exterior sheet member 1021) in the lateral direction is absorbed in the lateral direction. The amount of protrusion W50 from the outermost end 1010e of the main body 1010 to the outside of the leak-proof wall 1050 is smaller (W21 <W50).

Here, “when the exterior body 1020 is extended outward in the lateral direction so that the lateral length of the exterior body 1020 is maximized” means that the abdominal waistline elastic member 1031 provided in the exterior body 1020. The back waistline elastic member 1041 and the back leg elastic member 1042 are extended so that the first exterior sheet member 1021, the abdomen second exterior sheet member 1022 a, and the back second exterior that constitute the exterior body 1020. This is when the sheet member 1022b is stretched without any difference until the dimensions of the sheet member 1022b coincide with or close to the dimensions of the single member.

Similarly, “when the leak-proof wall 1050 is extended outward in the lateral direction so that the lateral length of the leak-proof wall 1050 is maximized” refers to the skin of the wearer based on the base portion 1050 rp. The leakproof wall 1050 that has stood up is pulled outward in the lateral direction until it becomes substantially parallel to the exterior body 1020 that extends outward in the lateral direction, and is extended without wrinkles. In addition, since the leak prevention wall 1050 has a partial area of the top face portion 1051 and the lower face portion 1052 joined to each other by the joint portion 1061, the length of the leak prevention wall 1050 when the lateral length is maximized. The length D50 (see FIGS. 8A to 8C) is shorter than the lateral length D500 (see FIG. 5) of the sheet member 1050s by the amount joined by the joining portion 1061 (D50 <D500).

Further, in order to minimize the influence of the elastic force of the plurality of leg-hole elastic members 1055 provided on the leak-proof wall 1050, the plurality of leg-hole elastic members 1055 are also extended in the longitudinal direction, so that the leak-proof wall 1050 is It is desirable that the sheet member 1050 s constituting the sheet member 1050 s be stretched without a gap until the dimension in the longitudinal direction matches or is close to the dimension in the longitudinal direction of the single member. In the following description, the exterior body 1020 and the leakage prevention wall 1050 are extended outward in the lateral direction so that the lateral length of the exterior body 1020 and the lateral length of the leakage prevention wall 1050 are maximized. This time is simply referred to as “at maximum extension”.

The leak-proof wall 1050 is a part of the outer edge of the leg opening 1001HL (see FIG. 1) for passing the wearer's leg, and the leak-proof wall 1050 is the exterior body 1020 (first) at the minimum position P20. In the case where it is disposed on the inner side in the lateral direction than the exterior sheet member 1021), it is difficult for the exterior body 1020 to visually recognize the position of the leg opening 1001HL. In such a situation, when the wearer tries to pass the leg through the leg opening 1001HL, the leg is placed on the leak-proof wall 1050 contracted along the leg opening 1001HL by the elastic force of the plurality of leg elastic members 1055. It becomes easy to be caught, and it becomes difficult for the leg to come off after being caught.

Therefore, when the maximum extension is performed, the amount of protrusion W50 from the outermost end 1010e of the absorbent main body 1010 to the outside of the leak-proof wall 1050 in the lateral direction is the outer package 1020 (first first) from the outermost end 1010e of the absorbent main body 1010. Since the leakage prevention wall 1050 protrudes outward in the lateral direction from the exterior body 1020 by increasing the amount of outward protrusion W21 of the exterior sheet member 1021), the leg circumference when the wearer wears the diaper 1001 It becomes easier to visually recognize the position of the opening 1001HL. Therefore, since the wearer can pass the leg after firmly recognizing the position of the leg opening 1001HL, the leg is less likely to be caught on the leak-proof wall 1050, and the leg is easy to pass.

In the present embodiment, the lateral end 1050e of the leak-proof wall 1050 protrudes outward in the lateral direction from the outermost end 1010e of the absorbent main body 1010 at the minimum position P20. On the other hand, since the horizontal position of the lateral end 1021e of the first exterior sheet member 1021 (exterior body 1020) is the same as the lateral position of the outermost end 1010e of the absorbent main body 1010 at the minimum position P20, The first exterior sheet member 1021 does not project outward from the outermost end 1010e of the absorbent main body 1010 in the lateral direction, and the projection amount W21 of the first exterior sheet member 1021 is 0 (zero). Therefore, in FIG. 8A, W21 is indicated by an arrow.

The first exterior sheet member 1021 does not have to have the lateral position of the lateral end 1021e equal to the lateral position of the outermost end 1010e of the absorbent main body 1010 at the minimum position P20. For example, as in another example shown in FIG. 8B, the position of the lateral end 1021e of the first exterior sheet member 1021 may protrude outward from the position of the outermost end 1010e of the absorbent main body 1010 in the lateral direction. In this case, the protrusion amount W21 of the first exterior sheet member 1021 from the outermost end 1010e of the absorbent main body 1010 to the outside in the lateral direction takes a positive value. Further, as in another example shown in FIG. 8C, in the lateral direction, even if the lateral end 1021e of the first exterior sheet member 1021 is located inside the position of the outermost end 1010e of the absorbent main body 1010, Good. In this case, the protrusion amount W21 of the first exterior sheet member 1021 from the outermost end 1010e of the absorbent main body 1010 to the outside in the lateral direction takes a negative value. Therefore, the “outward protrusion amount” can take any of a positive value, 0 (zero), and a negative value.

As shown in FIG. 2, the joining portion 1061 is below the line UL3 where one end 1061a in the longitudinal direction connects the lower end 1301u of the ventral first locking region 1301 and the lower end 1302u of the ventral second locking region 1302. The other end 1061b in the longitudinal direction is located below the line UL4 connecting the lower end 1401u of the back-side first locking region 1401 and the lower end 1402u of the back-side second locking region 1402. It is desirable. That is, in the vertical direction, on the lower side of the line connecting the lower end of the first locking part 1101 and the lower end of the second locking part 1102, It is desirable that the end (one end 1061a) and the end (the other end 1061b) on the back side waistline portion 1004 are located.

This is because, in the longitudinal direction, one end 1061a in the longitudinal direction of the joint portion 1061 is positioned above the line UL3 connecting the lower end 1301u of the ventral first locking region 1301 and the lower end 1302u of the ventral second locking region 1302. In other words, when the rigid joint portion 1061 is positioned on the ventral waist part 1003, the fingertip of the leg may be caught on the joint part 1061 when the wearer passes the leg through the leg hole opening 1001HL. There is sex. Therefore, in the vertical direction, by not positioning the joint 1061 on the ventral waist part 1003, a situation in which the fingertip of the leg is caught on the joint 1061 is suppressed, and the wearer can easily pass the leg.

Also, in the vertical direction, the other end 1061b of the joint portion 1061 in the longitudinal direction is above the line UL4 connecting the lower end 1401u of the back side first locking region 1401 and the lower end 1402u of the back side second locking region 1402. In other words, since the joint portion 1061 having rigidity is not located in the back waistline portion 1004, it is difficult for the joint portion 1061 to bite into the wearer's buttocks and back, and the flexibility is further improved. Since the non-joining part 1062 which has has contact with a wearer's skin, a touch becomes favorable and can suppress the discomfort and discomfort at the time of wearing of the diaper 1001.

In the present embodiment, as shown in FIGS. 2 and 3, in the thickness direction, the joint portion 1061 does not overlap with the absorbent core 1011 and, as shown in FIG. 5, one joint portion in the lateral direction. An interval W61 between the first joint portion 1061 and the other joining portion 1061 is shorter than a lateral length W11ea at one end 1011ea in the longitudinal direction of the absorbent core 1011 and a lateral length W11eb at the other end 1011eb (W61 <W11ea). , W61 <W11eb).

That is, the rigid joined portion 1061 is disposed outside the constricted portion 1011 c of the absorbent core 1011 in the lateral direction, and the flexible non-joined portion 1062 has a portion overlapping the absorbent core 1011. Therefore, the situation where the joint 1061 is pressed against the wearer's skin by the absorbent core 1011 having a thickness to deteriorate the touch when the diaper 1001 is worn is suppressed. And since the non-joining part 1062 contacts a wearer's skin, while the diaper 1001 wears it, it becomes easy to deform | transform the leak-proof wall 1050 according to a wearer's body shape. However, the absorptive core 1011 necessarily has the constricted portion 1011c, and the joining portion 1061 is not necessarily disposed in the space portion formed outside the constricted portion 1011c.

Moreover, in this embodiment, as shown in FIG. 3, in the longitudinal direction of the absorbent main body 1010, the absorbent main body 1010 and the exterior body 1020 are joined in the thickness direction in the region where the joint portion 1061 is provided. The lateral width W7c of the joining region 1007 (center joining region 1007c) is the lateral width W7a of the joining region 1007 (abdominal joining region 1007a and back joining region 1007b) at both ends 1010ea and 1010eb of the absorbent main body 1010. , W7b (hereinafter simply referred to as “the narrow part”) is provided (W7c <W7a, W7c <W7b). The narrow portion in the bonding region 1007 does not need to be provided so as to overlap the entire bonding portion 1061 in the lateral direction, and overlaps at least a part of the bonding portion 1061 in the horizontal direction as shown in FIG. As long as it is provided. That is, the joining area | region 1007 should just have the said narrow part in lower end area | region 1050BA (refer FIG. 7A). In FIG. 3, the lateral width W7c in the narrow portion is the same as the distance W61 between one joint 1061 and the other joint 1061.

Thus, in the lower end region 1050BA located between the wearer's crotch when the diaper 1001 is worn, by narrowing the lateral width of the joining region 1007 (W7c <W7a, W7c <W7b), the leg opening 1001HL (FIG. 1, in the vicinity of FIG. 7A and FIG. 7B, the absorbent main body 1010 and the exterior body 1020 are not joined in the thickness direction. As a result, the flexible exterior body 1020 is easy to bend and the wrinkles are easily moved, so that the leak-proof wall 1050 is more easily exposed to the outside in the lateral direction, and the position of the leg opening 1001HL is easily visually recognized on the appearance. Become.

As shown in FIG. 6, among the plurality of leg-hole elastic members 1055 provided on the leak-proof wall 1050, the first to fifth leg-hole elastic members 1551 to 1555 are provided on the top surface portion 1051, and in the lateral direction. In addition, one fifth leg-hole elastic member 1555 is disposed inside the joint portion 1061, and four first to fourth leg-hole elastic members 1551 to 1554 are arranged outside the joint portion 1061. Therefore, in the lateral direction, the number of leg-holes elastic members 1055 arranged outside the joint 1061 is larger than the number of the leg-holes elastic members 1055 arranged inside the joint 1061 and the joints 1061.

In the lateral direction of the leak-proof wall 1050, the sheet member 1050 s is turned over when the diaper 1001 is worn because the region outside the region where the joint portion 1061 is provided has lower rigidity than the region where the joint portion 1061 is provided. It is easy to bend and bend. However, in the diaper 1001, as shown in FIG. 9, in the lateral direction of the leak-proof wall 1050, the leg portion elastic member 1055 having rigidity is provided in a region outside the region where the joint portion 1061 is provided. By arranging more than the provided area | region, the rigidity in the said outer area | region becomes high, can be applied to a wearer's skin in the state which maintained the surface shape of the top | upper surface part 1051, and leads to an improvement of fit property.

In addition, it is desirable that the first to fourth leg-hole elastic members 1551 to 1554 arranged in a region outside the region where the joint portion 1061 is provided in the lateral direction of the leak-proof wall 1050 are colored. This is because when the diaper 1001 is worn, the leak-proof wall 1050 is conspicuous in appearance, and the leg opening 1001HL (see FIG. 1) is more easily visible.

However, when the diaper 1001 is viewed from the abdomen (see FIG. 7A), the entire colored first to fourth leg elastic members 1551 to 1554 are visible so as to go around the wearer's legs. There is a possibility that the wearer may be given an impression that the leg-hole elastic member 1055 is strongly tightened around the leg by the elastic force. Therefore, when the diaper 1001 is viewed from the abdominal side, it is desirable that the leakage prevention wall 1050 is not exposed outside in the lateral direction from the exterior body 1020 at least in the region where the non-joint portion 1062 is provided. As a result, the leakproof wall 1050 is hidden by the exterior body 1020 and cannot be seen above the lower end region 1050BA, so that the impression that the tightening around the legs due to the elastic force of the leg elastic members 1055 is strong is mitigated. A soft impression which the exterior body 1020 comprised by the member has can be given to the wearer.

As shown in FIG. 6, the lower leg portion 1052 is provided with a fifth leg-hole elastic member 1555 and a sixth leg-hole elastic member 1556. Here, the fifth leg-hole elastic member 1555 is provided at both the top surface portion 1051 and the bottom surface portion 1052 because it is provided at substantially the same position as the position of the folding line f2.

As shown in FIGS. 2 and 4A, the skin-side surface and the lower surface portion 1052 of the absorbent main body 1010 (top sheet 1012) are not separated by the lower end joint portion 1631 at both ends in the longitudinal direction of the leak-proof wall 1050. The skin-side surface is joined, and the upper-side end joint portion 1632 joins the skin-side surface of the lower surface portion 1052 and the non-skin-side surface of the top surface portion 1051. As shown in FIG. 2, the lower end joint portion 1631 and the upper end joint portion 1632 are arranged in a region on the upper side in the vertical direction with respect to the non-joint portion 1062 and in a region on the outer side in the lateral direction with respect to the joint portion 1061. Yes.

In this embodiment, the lower end joint portion 1631 and the upper end joint portion 1632 are provided at both ends in the longitudinal direction of the leak-proof wall 1050, but at least on the back waistline portion 1004 side, The end joint portion 1631 and the upper end joint portion 1632 may be provided in a region on the upper side in the vertical direction with respect to the non-joint portion 1062 and in a region on the outer side in the lateral direction with respect to the joint portion 1061.

If the joint portion 1061 is provided up to the upper end portion of the back waistline portion 1004, the joint portion 1061 having rigidity is further more than the apex portion t (see FIG. 9) of the protrusion of the wearer's buttocks. Easily shifts inward and easily bites into the buttocks. However, the longitudinal back end of the leak-proof wall 1050 is fixed to the absorbent main body 1010 outside the joint 1061 in the lateral direction by the lower end joint 1631 and the upper end joint 1632. Thus, the non-joining portion 1062 is provided so as to spread from the inner side in the lateral direction toward the outer side.

Thereby, the non-joining part 1062 which has flexibility fits the shape of the collar part on the laterally outer side than the apex part t of the projecting part of the collar part, and the displacement of the joint part 1061 to the laterally inner side and the biting into the collar part are suppressed. be able to. Moreover, it becomes easy to maintain the cup shape along the shape of the buttocks of the non-joining portion 1062, and the excrement is more difficult to leak.

As shown in FIG. 4A, the upper end joint portion 1632 that is a joint portion between the skin side surface of the lower surface portion 1052 and the non-skin side surface of the top surface portion 1051 corresponds to a bending position from the inner side to the outer side in the lateral direction. It is desirable that the fold line f2 be positioned away from the position of the fold line f2 by a predetermined distance D632. Thus, since the rigid upper end joint part 1632 does not exist at the bent position of the leak-proof wall 1050, when the diaper 1001 is worn, the uncomfortable feeling on the wearer's skin can be reduced.

=== Second Embodiment ===
<Basic configuration of diaper 2001>
As an example of the absorbent article handled in the present embodiment, a basic configuration of a pants-type disposable diaper 2001 (hereinafter also referred to as “diaper 2001”) will be described. FIG. 10 is a plan view of the diaper 2001 in the unfolded and extended state. FIG. 11 is a schematic perspective view of the diaper 2001 viewed from the ventral side. 12A is a schematic cross-sectional view along AA in FIG. 10, FIG. 12B is a schematic cross-sectional view along BB in FIG. 10A, and FIG. 12C is a schematic cross-sectional view along CC in FIG. 10A. . Note that the “extended state” in FIG. 10 is a state in which the product (diaper 2001) has been fully extended, specifically, the dimensions of each member (for example, a back sheet 2030, which will be described later) constituting the diaper 2001. It means a state in which it has been extended to a length that matches or is close to the dimension of the member itself.

This diaper 2001 has a vertical direction, a horizontal direction, and a front-back direction as three directions orthogonal to each other in the pants-type state of FIG. And in the following, the one side and the other side in the vertical direction in this pants-type state are also referred to as the “trunk opening side” and the “inseam side”, respectively, and the front side and the back side in the front-rear direction are respectively Also called “ventral” and “dorsal”.

On the other hand, in the unfolded state of FIG. 10, the diaper 2001 has a longitudinal direction and a width direction as three directions orthogonal to each other. In the following description, the one side and the other side in the longitudinal direction in the developed state are also referred to as “abdominal side” and “back side”, respectively. In addition, said width direction in the expansion | deployment state is the same direction as said horizontal direction in a pants type state. Therefore, in the following, the width direction is also referred to as “lateral direction”. Moreover, the longitudinal direction of the unfolded state is a direction along the longitudinal direction of the pants-type state. In addition, as shown in FIG. 12, the direction perpendicular to the longitudinal direction (longitudinal direction) and the lateral direction (width direction) is referred to as the “thickness direction”, and the side in contact with the skin of the wear target is referred to as the “skin side”. The opposite side is referred to as the “non-skin side”.

Moreover, as shown in FIG. 10, the diaper 2001 has a ventral waist part 2003, a back waist part 2004, and a crotch part 2005 in the longitudinal direction. The ventral side waist part 2003 is a part located on the wearer's ventral side when the diaper 2001 is worn. The back waistline portion 2004 is a portion located on the wearer's back side when the diaper 2001 is worn. A crotch part 2005 is provided between the ventral waist part 2003 and the back waist part 2004.

The diaper 2001 of the present embodiment includes an absorbent main body 2010, a top sheet 2020, a back sheet 2030, and a leak-proof wall 2050. 10, the absorbent main body 2010 is folded in half with the predetermined position CL10 in the longitudinal direction (longitudinal direction) of the absorbent main body 2010 as a folding position, and the antinodes opposed to each other in the folded state. When the side waistline part 2003 and the back side waistline part 2004 are joined by welding or the like at the ventral side edge part 2003es and the back side edge part 2004es, the

waistline parts

2003 and 2004 are connected in an annular shape, A pant-type diaper 2001 having a waist opening BH and a pair of leg openings LH and LH as shown in FIG. 11 is obtained.

The absorptive main body 2010 has a function of absorbing excrement such as urine, has a substantially rectangular shape in plan view as shown in FIG. 10, and has a longitudinal center along the longitudinal direction of the diaper 2001 and a lateral center. Is arranged. The “plan view” refers to a case where the side edge portions 2003es and 2004es are disconnected (locked) after the product is taken out of the package, and the members are viewed in a state where the members are expanded to the extent that wrinkles are eliminated. . For example, it refers to a case where the absorbent main body 2010 is stretched and attached to a board or the like and viewed in a fixed state. The absorbent main body 2010 includes a liquid absorbent absorbent body (absorbent core) 2011 and a core wrap sheet 2012 that covers the outer peripheral surface of the absorbent body 2011. In addition, leakproof walls 2050 are provided on both sides of the absorbent main body 2010 in the lateral direction. Details of the leak-proof wall 2050 will be described later.

The absorber 2011 is formed by molding liquid absorbent fibers such as pulp fibers into a predetermined shape, and a superabsorbent polymer (so-called SAP) or the like is mixed therein. In the present embodiment, the absorber 2011 has a substantially hourglass shape in plan view, and has a constricted portion 2011c whose central portion in the longitudinal direction is recessed inward in the lateral direction. That is, the absorber 2011 has a constricted portion 2011c having a smaller dimension in the lateral direction than both end portions 2011ea and 2011eb in the longitudinal direction of the absorber 2011 at a position between both end portions 2011ea and 2011eb in the longitudinal direction. The core wrap sheet 2012 is a liquid-permeable sheet member that covers the outer peripheral surface of the absorbent body 2011, and tissue paper, nonwoven fabric, or the like can be used.

The top sheet 2020 is a liquid-permeable sheet member (inner layer sheet) that is disposed on the skin side surface in the thickness direction of the absorbent main body 2010 and contacts the wearer's skin when the diaper 2001 is worn. The top sheet 2020 of this embodiment is formed of, for example, an air-through nonwoven fabric or a spunbond nonwoven fabric.

The back sheet 2030 is a sheet member (outer layer sheet) that is disposed on the non-skin side in the thickness direction of the absorbent main body 2010 and constitutes the outer layer of the diaper 2001. In the present embodiment, the back sheet 2030 includes a back film 2031, an upper outer layer sheet 2032, and a lower outer layer sheet 2033. The back film 2031 is a liquid-impermeable and moisture-permeable sheet member disposed on the non-skin side of the absorbent main body 2010, and is formed of, for example, a resin film. Providing the back film 2031 suppresses movement (penetration) of moisture such as urine absorbed by the absorbent main body 2010 toward the wearer's clothes.

The back sheet 2030 and the absorbent main body 2010 are joined to each other by a main body joint portion 2080. FIG. 13 is a schematic plan view for explaining the main body joint portion 2080. In FIG. 13, the main body joint portion 2080 is formed by providing an adhesive such as a hot melt adhesive in a region indicated by a diagonally upward diagonal line between the absorbent main body 2010 and the back sheet 2030. The main body joint portion 2080 is a part of a region where a fold joint portion 2061 (details of the fold joint portion 2061 will be described later) is formed in the longitudinal direction, and the width in the lateral direction is shortened. Specifically, the width W80c at the position in between is narrower than the width W80e at the positions of both ends in the longitudinal direction of the main body joint portion 2080 (W80e> W80c). The width W80c is narrower than the width W80e at least at the position where the lateral length of the outer layer sheet 2032 is minimum in the vertical direction (the position of the CC cross section in FIG. 10). And in the part where this width | variety (W80c) is narrow, the main body junction part 2080 and the folding joint part 2061 do not overlap in the thickness direction. The reason for this will be described later.

The width W80 (W80e and W80c) referred to here is the length from one side end to the other end of the main body joint portion 2080 in a predetermined position in the longitudinal direction. Further, the main body bonding portion 2080 may be formed by arranging a plurality of band-shaped (rectangular) bonding regions along the longitudinal direction side by side as shown in FIG. In that case, the part (namely, clearance gap) in which the adhesive agent is not provided may be formed between the two strip | belt-shaped area | regions adjacent to the horizontal direction.

The upper outer layer sheet 2032 and the lower outer layer sheet 2033 are flexible sheet-like members that are arranged on the non-skin side of the back film 2031 while being stacked in the thickness direction, and are formed of, for example, a spunbond nonwoven fabric or the like. The upper outer sheet 2032 and the lower outer sheet 2033 have the same shape at least in the ventral waist part 2003 and the back waist part 2004, and as a whole have a substantially hourglass shape as shown in FIG. That is, the back seat 2030 has a constricted portion 2030c in which a central portion (crotch portion 2005) in the longitudinal direction is recessed inward in the lateral direction between the ventral waist portion 2003 and the back waistline portion 2004.

Further, an elastic member such as rubber thread is provided between the upper outer sheet 2032 and the lower outer sheet 2033 in the thickness direction. In the present embodiment, as shown in FIG. 10, a plurality of ventral side waistline elastic members 2035 a have a predetermined expansion ratio in the ventral side waistline 2003 of the diaper 2001 (the region between the abdominal side edge parts 2003es and 2003es). Thus, the upper outer layer sheet 2032 and the lower outer layer sheet 2033 are sandwiched and joined in a state of being stretched in the horizontal direction. By this ventral waistline elastic member 2035a, the stretchability in the lateral direction is imparted to the belly side waistline 2003 of the diaper 2001. Similarly, in the back waistline portion 2004 (the region between the back side edge portions 2004es and 2004es) of the diaper 2001, the plurality of back waistline elastic members 2035b are extended in the lateral direction at a predetermined extension magnification. It is joined between the outer layer sheet 2032 and the lower outer layer sheet 2033. The back waistline elastic member 2035b provides lateral stretchability to the back waistline 2004 of the diaper 2001.

The “elongation magnification” of the elastic member indicates the degree of elongation when the natural length of the elastic member (thread rubber) is 1. For example, when the expansion magnification is 1.2, the elastic member is natural. This means that the length has been extended by 0.2.

Also, the back waistline portion 2004 is provided with a plurality of backside leg elastic members 2035 lg. The back-side leg-hole elastic member 2035 lg is arranged so as to be curved along the constricted portion 2030 c from the inner region in the longitudinal direction of the back-side waist portion 2004 (position near the center in the longitudinal direction of the absorber 2011). Specifically, as shown in FIG. 10, the back leg elastic member 2035 lg is a straight portion arranged along the horizontal direction in the central portion in the horizontal direction (region where the absorber 2011 is arranged). 2035 lgs, and a curved portion 2035 lgc arranged so as to bend obliquely upward toward the outside in the lateral direction from both lateral sides of the straight portion 2035 lgs. The linear portion 2035 lgs and the curved portion 2035 lgc are joined between the upper outer layer sheet 2032 and the lower outer layer sheet 2033 in a state of being stretched at different stretching magnifications.

In the present embodiment, the back leg elastic member 2035lg is arranged so that the expansion ratio in the straight portion 2035lgs is lower than the expansion ratio of the back waistline elastic member 2035b. Since the straight portion 2035lgs has a portion overlapping with the absorbent body 2011 (absorbent body 2010) in the central portion in the lateral direction, the absorbent body 2011 is excessively contracted in the lateral direction by lowering the expansion ratio. Can be suppressed. Note that the expansion magnification may be different depending on the position of the straight portion 2035 lgs in the horizontal direction. For example, in the straight line portion 2035 lgs, the expansion ratio at the center in the horizontal direction may be lower than the expansion ratio at both ends in the horizontal direction. Thereby, a gradient is generated in the stress at the straight portion 2035 lgs, and the shrinkage of the absorber 2011 can be suppressed without impairing the fit.

On the other hand, the expansion ratio of the bending portion 2035lgc is arranged to be higher than the expansion ratio of the back waistline elastic member 2035b. The curved portion 2035lgc is disposed along the constricted portion 2030c on the back side of the diaper 2001, but this region abuts on the wearer's buttocks when the diaper 2001 is worn, and the wearer moves the leg to shift the position. It is a part that tends to occur. Therefore, by increasing the expansion ratio of the bending portion 2035 lgc, the contraction force is increased to make it difficult for displacement. Moreover, since the shrinkage | contraction amount of the back seat | sheet 2030 becomes large in the vicinity of the leg periphery opening LH, the back seat | sheet 2030 becomes easy to deform | transform into the shape along the roundness of a wearer's buttocks, and can improve fitting property. Similar to the straight line portion 2035 lgs, the expansion magnification may be different in the lateral direction of the curved portion 2035 lgc. For example, in the bending portion 2035 lgc, the expansion ratio may be higher on the outer side than on the inner side in the horizontal direction.

<Leakage barrier 2050>
Next, the leakage barrier 2050 will be described. The leak-proof walls 2050 are arranged along the longitudinal direction of the absorbent main body 2010 (vertical direction of the diaper 2001) on both lateral sides of the absorbent main body 2010, and from the side end of the absorbent main body 2010 when the diaper 2001 is worn. It stands up and it suppresses that excrement leaks (lateral leakage) to the outside of diaper 2001. FIG. 14 is a plan view of the leak-proof wall 2050 in the expanded and extended state. FIG. 15 is a schematic cross-sectional view illustrating the region D in FIG. 12C in an enlarged manner. In FIG. 15, the scale in the thickness direction is modified for convenience of explanation.

The leak-proof wall 2050 is formed by folding a rectangular sheet member 2050s as shown in FIG. 14 in the lateral direction along folding lines f1 to f3 along the longitudinal direction (vertical direction). As the sheet member 2050s forming the leak-proof wall 2050, a flexible sheet member such as a non-woven fabric can be used. In addition, the leak-proof wall 2050 is provided with a plurality of leak-proof wall elastic members 2055 such as rubber thread that can expand and contract in the longitudinal direction. In the example of FIG. 14, six leak-proof wall elastic members 2551 to 2556 are arranged along the longitudinal direction from the outside in the lateral direction to the inside. Each of the leak-proof wall elastic members 2551 to 2556 is joined to the leak-proof wall 2050 in a state of being stretched at a predetermined stretch ratio in the longitudinal direction. The leakproof wall elastic member 2055 imparts stretchability along the longitudinal direction to the leakproof wall 2050, and erects the leakproof wall 2050 when the diaper 2001 is worn.

The leak-proof wall elastic member 2055 exhibits stretchability in a range indicated by a broken line in FIGS. 10 and 14. In addition, the leak-proof wall elastic member 2055 which does not express a stretch property may exist in the area | region of the outer side of a longitudinal direction (vertical direction) rather than the range shown with the broken line in FIG.10 and FIG.14. Further, the number and arrangement of the leak-proof wall elastic members 2055 are not limited to those shown in FIG. 14, and can be appropriately changed according to the use of the diaper 2001.

In the unfolded state shown in FIG. 14, the lateral inner end 50ei of the leak-proof wall 2050 (sheet member 2050s) is between the absorbent main body 2010 and the leak-proof film 31 (back sheet 2030) in the thickness direction. Bonded and fixed. On the other hand, the lateral outer end portion 2050eо of the leak-proof wall 2050 (sheet member 2050s) projects outward in the lateral direction of the absorbent main body 2010. In this state, the outer end portion 2050eо is bent inward in the lateral direction with the fold line f1 as a base point, and the sheet members 2050s are overlapped in the thickness direction with the leakproof wall elastic members 2551 to 2556 sandwiched therebetween, Are joined together. Of the leak-proof wall elastic members 2055 provided side by side in the horizontal direction, the outermost elastic member (the leak-proof wall elastic member 2551 in FIG. 14) is arranged at the horizontal position of the fold line f1. Has been.

Subsequently, the sheet member 2050s is bent to the non-skin side in the thickness direction and to the inner side in the lateral direction with the fold line f2 as a base point. The lateral position of the fold line f2 is substantially the same as the lateral position of the leak-proof wall elastic member 2555. Subsequently, the sheet member 2050s is bent toward the skin side in the thickness direction and inside in the horizontal direction with the fold line f3 as a base point. Thereby, the leak-proof wall 2050 bent in a substantially S shape as shown in FIGS. 12 and 15 is formed. In the case of FIG. 15, the position of the fold line f3 is the base 2050rp when the leak-proof wall 2050 is erected.

The leak-proof wall 2050 has a top surface portion 2051 formed on the most skin side in the thickness direction by folding the sheet member 2050s from one side in the lateral direction to the other side. The top surface portion 2051 is a region having a predetermined width in the lateral direction between the fold line f1 and the fold line f2. The top surface portion 2051 is provided with leak-proof wall elastic members 2551 to 2555. Further, a lower surface portion 2052 is formed on the non-skin side of the top surface portion 2051 in the thickness direction. The lower surface portion 2052 is a region having a predetermined width in the lateral direction between the fold line f2 and the fold line f3. The lower surface portion 2052 is provided with leak-proof wall elastic members 2555 to 2556. Note that the leak-proof wall elastic member 2555 is provided at both the top surface portion 2051 and the bottom surface portion 2052 because it is disposed at substantially the same position as the folding line f2 in the lateral direction as described above.

And in the leak-proof wall 2050, a part area | region of the top | upper surface part 2051 and the lower surface part 2052 is joined to the thickness direction via the folding joint part 2061. FIG. That is, the surfaces on one side in the thickness direction of the leak-proof wall 2050 (sheet member 2050s) are joined by the folding joint portion 2061. Hereinafter, a region on the inner side in the lateral direction from the portion where the folded joint portion 2061 is formed in the leak-proof wall 2050 is also referred to as a folded portion 2053. In the present embodiment, a fold joint portion 2061 indicated by a hatched portion in FIG. 15 is provided in a region inside the horizontal direction of the top surface portion 2051 (lower surface portion 2052), and a fold portion 2053 is formed. Note that the folding joint 2061 is formed using an adhesive means using an adhesive such as a hot-melt adhesive or a crimping means such as embossing. Note that the folding joint portion 2061 does not need to be formed over the entire lateral direction of the folding portion 2053 as shown in FIG. 15, for example, it is folded at the lateral inner end (the position of the folding line f2 in FIG. 15). The joint portion 2061 may not be formed. In other words, the folding joint portion 2061 may be formed at a predetermined distance from the laterally inner end of the top surface portion of the leak-proof wall 2050.

On the other hand, in the laterally outer region where the folding joint portion 2061 is not provided, the top surface portion 2051 and the bottom surface portion 2052 are not joined, and both can be detached in the thickness direction. Hereinafter, the outer side in the lateral direction of the top surface portion 2051 than the portion where the folded joint portion 2061 is provided is also referred to as a single layer portion 2054. Note that the “single layer” referred to here means a layer composed only of the top surface portion 2051, and the top surface portion 2051 itself may have a multilayer structure as shown in FIG.

The folding joint 2061 is not provided in the outer region in the longitudinal direction of the folding joint 2061. That is, in the leakage prevention wall 2050, in the longitudinal direction, the one side surface in the thickness direction of the leakage prevention wall 2050 (sheet member 2050s) is in the region on one side and the region on the other side of the folded joint portion 2061. The non-joining portion 2062 is not joined. In this non-joining portion 2062, the top surface portion 2051 and the bottom surface portion 2052 of the leak-proof wall 2050 are not joined as shown in FIG. 12B, so that the folding portion 2053 is not formed, and the lateral direction of the top surface portion 2051 is not formed. The entire region is a single layer part. In FIG. 10, the non-joining portion 2062 is provided on both outer sides in the longitudinal direction of the folded joint portion 2061, but the non-joining portion 2062 may be provided only on one side in the longitudinal direction.

Further, end joint portions 2063 are provided at both ends in the longitudinal direction of the leak-proof wall 2050. In the end joint portion 2063, as indicated by the hatched portion in FIG. 12A, the top surface portion 2051 and the bottom surface portion 2052 of the leak-proof wall 2050 are joined, and the bottom surface portion 2052 and the top sheet 2020 are joined. Accordingly, the top surface portion 2051 and the bottom surface portion 2052 are fixed to the skin side surface of the top sheet 2020 at the end portion of the leak-proof wall 2050 in the longitudinal direction. As shown in FIG. 10, the end joint portion 2063 is disposed on the outer side in the lateral direction than the folding joint portion 2061, and as a result, the laterally outer end portion of the top surface portion 2051 may rise. It is suppressed.

<Function of leak-proof wall 2050 when diaper 2001 is worn>
In the diaper 2001 of the present embodiment, the leak-proof wall 2050 has the above-described substantially S-shaped folding structure (see FIG. 15), so that even if excretion is performed, it is difficult for the wearer to feel uncomfortable. However, it can suppress that a clearance gap arises in a crotch part. FIG. 16 is a diagram illustrating a wearing state of the diaper 2001 before excretion is performed. FIG. 17 is a diagram illustrating a wearing state of the diaper 2001 after excretion is performed. FIG. 16 and FIG. 16 show a cross-sectional state when the diaper 2001 is worn at a position where the lateral length of the outer layer sheet 2032 is minimum in the longitudinal direction (CC cross-sectional position in FIG. 10).

In the wearing state of the diaper 2001 shown in FIG. 16, the top surface portion 2051 arranged on the skin side of the leak-proof wall 2050 comes into contact with the wearer's body. That is, it arrange | positions so that the whole top | upper surface part 2051 may surface-contact with respect to a wearer's body. The folding portion 2053 of the top surface portion 2051 has high rigidity because it is joined by the folding joint portion 2061 in a state where the top surface portion 2051 and the bottom surface portion 2052 are laminated. Therefore, when the contraction force by the leak-proof wall elastic members 2555 and 556 acts on the folded portion 2053, the folded portion 2053 is firmly pressed against the wearer's body while maintaining the surface shape. At this time, the distance between the pair of leak-proof walls 2050 in the horizontal direction (the distance between the folded

portions

2053 and 2053 in the horizontal direction) is defined as W50. On the other hand, in the top surface portion 2051, the single-layer portion 2054 laterally outer than the folding joint portion 2061 is provided with more leak-proof wall elastic members 2551 to 2554 than the inner side in the lateral direction than the folding joint portion 2061. Yes. Since the single layer portion 2054 has a lower rigidity than the folding portion 2053, it easily deforms freely. Therefore, when the contraction force by the leak-proof wall elastic members 2551 to 2554 disposed on the single layer portion 2054 is applied, the single layer portion 2054 is pressed against the wearer's skin side while forming a curved surface corresponding to the unevenness of the body. It is done. In addition, the plurality of leak-proof wall elastic members 2551 to 2554 can effectively prevent the single layer portion 2054 from being rolled up.

Thus, the entire top surface portion 2051 of the leak-proof wall 2050 can be fitted to the wearer's body. Further, since the top surface portion 2051 is in surface contact with the wearer's body, the contraction force by the plurality of leak-proof wall elastic members 2551 to 2556 is dispersed, and the surface pressure acting on the wearer's skin as a whole is measured. It is getting bigger. Therefore, compared with the case where the contraction force by the plurality of leak-proof wall elastic members 2551 to 2556 (for example, thread rubber) individually acts on the wearer's skin, the local increase in pressure is suppressed. Thus, it is possible to prevent the wearing comfort of the diaper 2001 from deteriorating and to hardly damage the wearer's skin.

In the present embodiment, at least one leak-proof wall elastic member 2556 is provided on the lower surface portion 2052 of the folding portion 2053 (see FIG. 15). Since the leak-proof wall elastic member 20556 contracts, the lower surface portion 2052 and the top surface portion 2051 are simultaneously pushed up to the skin side of the wearer, so that the folded portion 2053 maintains contact with the wearer's skin while maintaining the surface shape. (Surface contact) is easier.

In addition, as described with reference to FIG. 13, in the longitudinal direction, the lateral direction of the main body joint 2080 that joins the absorbent main body 2010 and the back sheet 2030 at the position where the lateral length of the outer layer sheet 2032 is minimum. The main body joint portion 2080 is formed inside the folded joint portion 2061 in the lateral direction. Therefore, the absorbent main body 2010 and the back sheet 2030 are not joined to each other at both ends in the lateral direction, and the upright base portion 2050rp of the leak-proof wall 2050 is not joined to the back sheet 2030. Thereby, it is suppressed that the rigidity of the standing base 2050rp becomes excessively high when the diaper 2001 is worn, and the bending deformation of the standing base 2050rp is hardly hindered. That is, the leak-proof wall 2050 is made easy to stand up naturally by making it easy to deform the standing base 2050rp in the region corresponding to the crotch of the wearer.

On the other hand, the width W80e in the lateral direction of the main body joint portion 2080 is wide at both ends in the longitudinal direction, and the main body joint portion 2080 and the folded joint portion 2061 overlap in the thickness direction. This region is a region close to the waistline opening, and it is less necessary to raise the leak-proof wall 2050 higher than the crotch side. Therefore, even if the upright base 2050rp and the back sheet 2030 are joined, a problem hardly occurs. Conversely, the strength of the leak-proof wall 2050 can be increased by increasing the rigidity of the upright base 2050rp. Furthermore, when the width W80e is wide, when the abdomen waistline portion 2003 or the back waistline portion 2004 (backsheet 2030) is pulled in the lateral direction when the diaper 2001 is worn, the absorptivity is linked to the backsheet 2030. The main body 2010 is easily widened in the lateral direction, and the absorbent main body 2010 can cover the wearer's body widely.

In the state of FIG. 16, when excretion is performed in the diaper 2001, the absorbent body 2011 absorbs urine and the like, becomes heavier, and tries to move so as to hang down. However, in the diaper 2001 of the present embodiment, a force that pushes the top surface portion 2051 upward (on the wearer's skin side) is generated by the contraction force of the plurality of elastic members provided in the folding portion 2053 and the single layer portion 2054. In addition, the increase in the weight of the absorber 2011 provides a resistance against the force by which the leak-proof wall 2050 is pulled downward. In addition, since the top surface portion 2051 is in surface contact with the wearer's skin, the friction on the contact surface is large, and the positional displacement of the top surface portion 2051 hardly occurs. Therefore, the horizontal interval W50 between the pair of leak-proof walls 2050 hardly changes before and after excretion. From these things, it is easy to maintain the state which the top | upper surface part 2051 of the leak-proof wall 2050 contact | abutted the wearer's skin like FIG. 17, and it becomes difficult to produce problems, such as a clearance gap producing in the leg periphery part of the diaper 2001. .

In addition, the sag of the absorber 2011 is more likely to occur as the standing part of the leak-proof wall 2050 is higher. That is, as shown in FIG. 17, the longer the distance L <b> 2 from the lateral outer end of the absorbent body 2011 to the portion where the leak-proof wall 2050 comes into contact with the skin of the wearer, the easier the absorbent body 2011 hangs down. Become. In this regard, in the leak-proof wall 2050 of the diaper 2001, the leak-proof wall 2050 is bent inward in the horizontal direction with the laterally outer end of the folded joint 2061 as a base point, and the position of the leak-proof wall elastic member 2555 (fold line f2) Thus, the folded portion 2053 is formed. By folding a part of the leak-proof wall 2050 by the folding part 2053, the distance L2 of the standing part of the leak-proof wall 2050 is suppressed from becoming too long, and the absorber 2011 is prevented from drooping greatly downward. This can make it difficult for the wearer to feel uncomfortable.

In addition, the folding joint part 2061 (folding part 2053) is formed in the area | region of the constriction part 2011c of the absorber 2011 in a longitudinal direction, as FIG. 10 shows. In other words, the pair of folding joints 2061 formed on both sides in the lateral direction do not overlap with the absorber 2011 in the thickness direction, and the distance between the pair of folding joints 2061 in the lateral direction is It is narrower than the length (width) of both ends in the vertical direction of the absorber 2011 in the horizontal direction. In the region where the constricted portion 2011c is formed in the absorber 2011, the distance from the lateral end portion of the absorber 2011 to the upright base portion 2050rp of the leak-proof wall 2050 becomes longer (see FIG. 15), and accordingly the absorber 2011 correspondingly. The sag is likely to occur. Therefore, by providing the leak-proof wall 2050 with a fold joint portion 2061 and folding the leak-proof wall 2050 at the fold portion 2053 in this region, the distance L2 can be shortened as much as possible to effectively suppress the sag of the absorber 2011. I am doing so. Furthermore, the portion where the rigidity is increased by the folding joint portion 2061 of the leak-proof wall 2050 by the folding joint portion 2061 being formed so as not to overlap the absorber 2011 in the thickness direction is worn by the absorber 2011. It is suppressed from being pressed against the person's body (skin side). Thereby, the deterioration of the touch at the time of diaper 2001 wear can be suppressed.

Subsequently, the state when the diaper 2001 is worn in the portion of the leak-proof wall 2050 where the non-joining portion 2062 is provided will be described. FIG. 18 is a cross-sectional view illustrating a state of the non-joining portion 2062 when the diaper 2001 is worn. FIG. 18 shows a cross-sectional state when the diaper 2001 is worn at a position where the non-joining portion 2062 is provided in the longitudinal direction (for example, a cross-sectional position along BB in FIG. 10).

In the state of FIG. 17, the leak-proof wall 2050 erected from the upright base portion 2050 rp is bent inward in the lateral direction with the fold joint portion 2061 serving as a bending base point, and a fold portion 2053 is formed. On the other hand, in the state of FIG. 18, the leak-proof wall 2050 is not provided with the folded joint portion 2061. In this case, the leak-proof wall 2050 erected from the upright base portion 2050rp is bent inward in the lateral direction with the leak-proof wall elastic member 2556 arranged at the closest position from the upright base portion 2050rp as a bending base point. And the top | upper surface part 2051 is formed by bend | folding laterally outward in the position (folding line f2) where the leak-proof wall elastic member 2555 is arrange | positioned. Thereby, in the area | region in which the folding junction part 2061 is not provided, the top | upper surface part 2051 similar to the case of FIG. 17 can be maintained. Thus, by not providing the folding joint portion 2061 in the vicinity of the waistline opening of the diaper 2001, the leakage preventing wall 2050 is fitted to the wearer's body in a surface while preventing the leakage preventing wall 2050 from becoming too rigid. be able to.

In addition, since the leak-proof wall elastic member 2556 is disposed as a base point for bending deformation of the leak-proof wall 2050, the leak-proof wall 2050 is difficult to bend at other portions, and the leak-proof wall 2050 is not intended while standing. It is suppressed that it falls at the place and falls down, or it gets depressed. That is, by adjusting the arrangement of the leak-proof wall elastic member 2556, the position where the leak-proof wall 2050 is bent can be easily controlled. Furthermore, since the state in which a part of the leak-proof wall 2050 is folded is also maintained in the same manner as the folding part 2053, the distance L3 of the standing part of the leak-proof wall 2050 is excessively longer than L2 in FIG. This is suppressed, and problems such as sagging when wearing the diaper 2001 are less likely to occur.

Thus, in the diaper 2001, the leak-proof wall elastic member 2556 is provided in the leak-proof wall 2050 at a position where the folded joint 2061 is formed or a position close thereto. In other words, at the time of wearing the diaper 2001, at least a portion of the leak-proof wall 2050 on the non-skin side of the folding joint portion 2061 and a portion located on the non-skin side with respect to the portion where the folding joint portion 2061 is provided. One of them is provided with a leak-proof wall elastic member 2556 along the longitudinal direction. Thereby, even in the region where the joint portion 2061 is not formed, a bent base point is easily formed on the leak-proof wall 2050, and the top surface portion 2051 can be formed naturally.

Here, as a comparative example, a case where the leak prevention wall 2050 is not provided with an elastic member corresponding to the leak prevention wall elastic member 2556 will be described. FIG. 19A and FIG. 19B are cross-sectional views for explaining a diaper wearing state of a comparative example. FIG. 19A is a view corresponding to FIG. 17 and shows a state of the leak-proof wall 2050 in a cross section in which the folded joint portion 2061 is formed. FIG. 19B is a view corresponding to FIG. 18 and shows a state of the leak-proof wall 2050 in a cross section in which the non-joining portion 2062 is formed.

In FIG. 19A, the leak-proof wall 2050 is bent with the folding joint portion 2061 as a base point, so that the folding portion 2053 and the top surface portion 2051 are formed, and the appearance is not significantly different from the state shown in FIG. Therefore, the distance L4 of the standing part of the leak-proof wall 2050 is substantially the same as the distance L2 in FIG.

On the other hand, in FIG. 19B, since the folding joint portion 2061 is not formed and the leak-proof wall elastic member 2556 is not provided, there is no base point when the leak-proof wall 2050 is bent inward in the lateral direction. Therefore, the leak-proof wall 2050 stands upright from the upright base portion 2050rp, and is bent outward in the lateral direction at the position (folding line f2) where the leak-proof wall elastic member 2555 is arranged as it is, so that the folded-in portion 2053 is not formed. When the folded portion 2053 is not formed, it is difficult to support the laterally inner end of the top surface portion 2051 by the contracting force of only the leakage preventing wall elastic member 2555, the planar shape of the top surface portion 2051 is difficult to be maintained, and the leakage preventing wall 2050 It becomes difficult to fit the wearer's body with the surface.

In the case of FIG. 19B, the contraction force of the leak-proof wall elastic member 2555 cannot resist the force by which the leak-proof wall 2050 is pulled downward due to the increase in the weight of the absorber 2011, and the horizontal distance between the leak-proof walls 2050 There is a possibility that W50 ′ may become narrower than in the case of FIG. 19 (W50> W50 ′). In this case, the contact position of the leak-proof wall 2050 with respect to the wearer's body moves toward the center in the lateral direction, so that the buttock portion is easily exposed, and the wearer is likely to feel uncomfortable. Moreover, since the leak-proof wall 2050 stands up without being folded by the folding part 2053, the distance L5 of the standing part is longer than the distance L4 (L2) in FIG. 19A, and the absorbent body 2011 is worn when the diaper 2001 is worn. May droop drastically and fit may deteriorate. And when distance L5 of the standing part of leak-proof wall 2050 becomes long in this way, possibility that the bending and deformation | transformation which are not intended to leak-proof wall 2050 will arise will become high.

Further, when considering the longitudinal direction (longitudinal direction) of the leak-proof wall 2050, the shape of the leak-proof wall 2050 suddenly changes from the state of FIG. 19A to the state of FIG. 19B at the boundary position between the folded joint part 2061 and the non-joint part 2062. May change. When such a sudden shape change occurs, the planar shape of the top surface portion 2051 of the leak-proof wall 2050 tends to collapse, and the fit when wearing the diaper 2001 is greatly deteriorated.

On the other hand, in the diaper 2001 of the present embodiment, the leak-proof wall elastic member 2556 is provided in a predetermined portion of the leak-proof wall 2050, so that a region where the folded joint portion 2061 is not formed (non- Even in the region where the joint portion 2062 is formed, the leak-proof wall 2050 can be folded and deformed in the same manner as the folding portion 2053. Therefore, the rapid shape change of the leak-proof wall 2050 is reduced between the portion where the folded joint portion 2061 is formed and the portion where the folded joint portion 2061 is not formed (non-joined portion 2062) (FIGS. 17 and 18). reference). Thereby, it becomes easy to stably maintain the top surface portion 2051 of the leak-proof wall 2050 in the most region in the longitudinal direction, and good fit is ensured.

In addition, as for the leak-proof wall elastic member 2556, it is more desirable to be arrange | positioned about the thickness direction at the position which overlaps with the folding joint part 2061, ie, the non-skin side of the folding joint part 2061 at the time of diaper 2001 wearing. If the folding joint portion 2061 and the leak-proof wall elastic member 2556 are arranged at overlapping positions, the contraction force of the leak-proof wall elastic member 2556 is likely to act on the wide range of the folding portion 2053 via the folding joint portion 2061. The folding portion 2053 (the top surface portion 2051) can easily fit the wearer's skin while maintaining the surface shape. In addition, as described with reference to FIG. 18, in the region where the non-joint portion 2062 is formed, the leak-proof wall elastic member 2556 serves as a base point for the leak-proof wall 2050 to be bent. The closer the position to the wall elastic member 2556 is, the closer the leakage prevention wall 2050 is bent. Therefore, the position of the base point where the leak-proof wall 2050 bends inward in the lateral direction is unlikely to shift at the boundary portion between the folded joint portion 2061 and the non-joint portion 2062 in the longitudinal direction, and the surface shape of the top surface portion 2051 is more easily maintained. .

Moreover, in the diaper 2001 of this embodiment, the side leakage of excrement is suppressed by ensuring that the height (for example, L2 in FIG. 17) at which the leakage prevention wall 2050 stands up when worn is secured to a certain height or more. It is easy. Specifically, in the longitudinal direction (longitudinal direction), the leakage prevention is performed so that the lateral length of the leakage prevention wall 2050 is maximized at the position where the lateral length (width) of the back sheet 2030 is minimized. When the wall 2050 is extended outward in the lateral direction, the lateral protrusion amount Ws50 from the lateral outer end 2010es of the absorbent main body 2010 to the folded joint 2061 is equal to the lateral length of the back sheet 2030. When the back sheet 2030 is extended outward in the lateral direction so as to be maximized, from the protruding amount Ws30 in the lateral direction from the outermost end 2010es of the absorbent main body 2010 to the lateral outer end 2030es of the back sheet 2030 Also try to get bigger. The “position at which the length (width) in the lateral direction of the back sheet 2030 is minimized in the longitudinal direction” refers to a position that hits the buttocks of the wearer when the diaper 2001 is worn, The corresponding position. In addition, the state in which the leakage prevention wall 2050 and the back sheet 2030 are “extensioned so that the length in the lateral direction is maximized” means that the leakage prevention wall 2050, the back sheet 2030, and the like are elongated in the horizontal direction without any problems. The state in which each member is extended until the dimension of the member coincides with or is close to the dimension of the member itself.

FIG. 20 is a schematic cross-sectional view of a diaper 2001 showing a state when the leak-proof wall 2050 and the back sheet 2030 are extended so that the length in the lateral direction is maximized. FIG. 20 shows a state in which the leak-proof wall 2050 and the back sheet 2030 are extended outward in the lateral direction in FIG. As shown in FIG. 20, the length (projection amount) Ws50 of the portion where the leak-proof wall 2050 projects laterally outward from the lateral outer end 2010es of the absorbent main body 2010 to the folded joint 2061 is the back sheet. The length (protrusion amount) Ws30 of the portion 2030 protrudes outward in the lateral direction is larger (Ws50> Ws30). Thereby, when the diaper 2001 is worn, even if the protruding portion of the back sheet 2030 is wound around the leg opening LH near the wearer's buttocks, the protruding portion of the back sheet 2030 is a leak-proof wall. Reaching a position higher than the standing height of 2050 is suppressed. That is, the back sheet 2030 is sandwiched between the top surface portion 2051 of the leak-proof wall 2050 and the wearer's skin, and a gap is generated, and excrement leaks from the gap, or the leak-proof wall 2050 faces the wearer's skin. It is suppressed that it becomes difficult to fit.

In the diaper 2001 of the present embodiment, the lateral outer end 2030es of the backsheet 2030 is the lateral direction of the absorbent main body 2010 at a position where the lateral length (width) of the backsheet 2030 is minimum in the longitudinal direction. The outer end 2010es is located on the inner side in the horizontal direction (see FIGS. 10 and 20). Therefore, in FIG. 20, the lateral protrusion amount Ws30 of the back sheet 2030 is negative. Of course, the laterally outer end 2030es of the backsheet 2030 may be positioned on the laterally outer side of the laterally outer end 2010es of the absorbent main body 2010, and even in that case, the above-described (Ws50> It is sufficient that the relationship of Ws30) is established.

The leak-proof wall 2050 of this embodiment is provided with a leak-proof wall elastic member 2556 that is a bent base point. Therefore, even if Ws50 becomes long (even if the leak-proof wall 2050 becomes high), the diaper 2001 At the time of wearing, problems such as the rising portion of the leak-proof wall 2050 being bent in the middle and falling are unlikely to occur. In other words, in the diaper 2001 of the present embodiment, the leakage preventing wall 2050 is located on the non-skin side with respect to the non-skin side portion of the folding joint portion 2061 and the portion where the folding joint portion 2061 is provided. Since the leak-proof wall elastic member 2556 is disposed in at least one of the portions, the leak-proof wall elastic member 2556 is not disposed as in the comparative example described in FIG. The wall 2050 can be increased (Ws50 can be increased).

Further, as shown in FIG. 15, the folding joint portion 2061 is provided at a predetermined distance from the laterally inner end of the top surface portion 2051 of the leak-proof wall 2050, so that the inner side of the leak-proof wall 2050 is provided. A so-called dry edge is formed at the end (the portion of the fold line f2 in FIG. 15). Thereby, when the diaper 2001 is worn, the touch of the inner end of the leak-proof wall 2050 becomes soft, and it becomes easy to realize good fit. In particular, the leak-proof wall 2050 of the present embodiment is such that the folded portion 2053 (the top surface portion 2051) is pressed against the wearer's skin in a plane, and therefore by providing a dry edge at the end of the folded portion 2053, The rigidity at the edge of the plane becomes low, and it is possible to make it difficult for the wearer to cause discomfort when wearing the diaper 2001.

<Modification>
The diaper 2001 can also be modified as follows. FIG. 21 is a schematic cross-sectional view for explaining a modified example of the diaper 2001. FIG. 21 shows a position where the lateral length (width) of the back sheet 2030 is minimized in the longitudinal direction (longitudinal direction), that is, a position corresponding to the CC section of FIG. This represents a cross-section.

As shown in FIG. 21, in the modified example of the diaper 2001, the laterally outer end portion 2020es of the top sheet 2020 is folded back along the leakproof wall 2050 in the lateral direction, and the folded end portion 2020es and the proofing are prevented. The leakage wall 2050 is joined to the lower surface portion 2052 by an adhesive or the like. Since the leak-proof wall 2050 and the top sheet 2020 are joined to each other, when the leak-proof wall 2050 stands up when the diaper 2001 is worn, a part of the top sheet 2020 including the lateral outer end portion 2020es is Then, it comes to stand up together with the leak-proof wall 2050. That is, the number of materials stacked on the standing part of the leak-proof wall 2050 increases, and the strength of the standing part increases. Thereby, it becomes difficult for the standing part of the leak-proof wall 2050 to bend or fall down in the middle, and the fitting property when wearing the diaper 2001 can be further improved.

When joining the leak-proof wall 2050 and the top sheet 2020, the lateral end 2020es of the top sheet 2020 and the leak-proof wall elastic member 2556 overlap in the thickness direction as shown in FIG. It is desirable to join at a position that is not. As described with reference to FIG. 18, the leak-proof wall elastic member 2556 is a portion that serves as a base point for bending of the leak-proof wall 2050 when the diaper 2001 is worn. Therefore, when the rigidity of this portion increases, This is because bending deformation is likely to be hindered, and the top surface portion 2051 may be difficult to maintain the surface shape.

Moreover, in the modified example of the diaper 2001, a leak-proof film 2070 is provided between the leak-proof wall 2050 and the absorbent main body 2010. The leak-proof film 2070 is a liquid-impermeable sheet member, and is disposed so as to overlap the portion where the leak-proof wall 2050 stands along the longitudinal direction in the thickness direction, and is bonded to each other by an adhesive or the like. . By providing the leak-proof film 2070, the number of materials stacked on the standing part of the leak-proof wall 2050 can be further increased, and the strength of the standing part of the leak-proof wall 2050 can be further increased. In addition, since the lateral inner side surface of the standing part of the leak-proof wall 2050 becomes liquid-impermeable, excrement is less likely to penetrate the leak-proof wall 2050, and the water resistance of the leak-proof wall 2050 is improved. Therefore, the standing portion of the leak-proof wall 2050 is less likely to be bent, and the occurrence of liquid leakage can be effectively suppressed.

=== Third Embodiment ===
The pants-type disposable diaper 2002 (hereinafter also referred to as “diaper 2002”) of the third embodiment is different from the diaper 2001 of the second embodiment in the configuration of the end joint 2063 and the body joint 2080. Since the other structure of the diaper 2002 is substantially the same as that of the diaper 2001, detailed description is omitted. FIG. 22 is a diagram illustrating the arrangement of the end joint 2063 and the main body joint 2080 in the unfolded and extended diaper 2002.

In the diaper 2002 in FIG. 22, a main body joint 2080 (represented by a hatched portion) that joins the back sheet 2030 and the absorbent main body 2010 is divided into three regions in the longitudinal direction. A main body belly side upper end joint portion 2080f, a main body back side upper end joint portion 2080b, and a main body center joint portion 2080c are provided. The main body belly side upper end joint portion 2080 f joins the back side 2030 with the ventral end portion in the longitudinal direction of the absorbent main body 2010 (the ventral upper end portion in the vertical direction). The main body back side upper end joint portion 2080 b joins the back side end portion in the longitudinal direction of the absorbent main body 2010 (back side upper end portion in the vertical direction) to the back sheet 2030. The main body center joint portion 2080 c joins the central portion (the crotch portion 2005) in the longitudinal direction of the absorbent main body 2010 to the back sheet 2030.

Further, in the diaper 2002, among the end joint portions 2063 (represented by blackened portions) for joining the leak-proof wall 2050 and the top sheet 2020 (inner layer sheet), the ventral side end portion in the longitudinal direction (in the longitudinal direction) The abdominal side upper end part) is defined as the abdominal side end joint part 2063f, and the back end part in the longitudinal direction (the back side upper end part in the longitudinal direction) is defined as the back side end joint part 2063b.

As shown in FIG. 22, the upper end 2080beu (longitudinal back side end) in the longitudinal direction of the main body back side upper end joint portion 2080b and the upper end 2063beu (longitudinal back side end in the longitudinal direction) of the back side end joint portion 2063b. ) Is located at the upper end in the longitudinal direction of the absorbent main body 2010. On the other hand, the lower end 2080 bed (longitudinal inner end) in the vertical direction of the main body back side upper end joint portion 2080 b is lower than the lower end 2063 bed (longitudinal inner end) in the vertical direction of the back side end joint portion 2063 b. Is located. That is, in the diaper 2002, the main body back side upper end joint part 2080b and the back side end joint part 2063b are arranged overlapping in the vertical direction (longitudinal direction).

In FIG. 22, the entire region of the back end joint portion 2063b overlaps with the main body back side upper end joint portion 2080b. However, it is not always necessary that all the regions overlap, and at least a part of the regions overlap. It should be. Further, the lower end 2080bed of the main body back side upper end joint portion 2080b and the lower end 2080fed of the back side end joint portion 2063b may be at the same position in the vertical direction. That is, in the diaper 2002, it is only necessary that the position of the lower end 2080bed of the main body back side upper end joint portion 2080b is not higher than the position of the lower end 2063bed of the back end end joint portion 2063b in the vertical direction. The same applies to the relationship between the main body ventral upper end joint 2080f and the ventral end joint 2063f (see FIG. 22).

A plurality of leak-proof wall elastic members 2055 (2551 to 2556 in FIGS. 15 and 22) arranged in the horizontal direction are arranged on the leak-proof wall 2050 of the diaper 2002, similarly to the diaper 2001. Each leak-proof wall elastic member 2055 is joined to the leak-proof wall 2050 in a state of being extended in the longitudinal direction (longitudinal direction) in a range indicated by a broken line in FIG. That is, in the longitudinal direction of the diaper 2002, at least between the inner end (lower end 2063fed in the vertical direction) of the ventral end joint 2063f and the inner end (lower end 2063bed in the vertical direction) of the back end joint 2063b. The wall elastic members 2551 to 2556 are arranged in a state of extending along the longitudinal direction. Thereby, in the said area | region, the stretchability by the leak-proof wall elastic members 2555-1555 is expressed.

The leak-proof wall elastic members 2551 to 2556 are joined to the leak-proof wall 2050 in a state of being stretched at a predetermined stretch ratio. In the diaper 2002, the expansion ratio of the leak-proof wall elastic members 2551 to 2554 arranged in a region outside the folding joint portion 2061 of the leak-proof wall 2050 in the lateral direction is about 2.0 times. The fiber diameter of the leak-proof wall elastic members 2551 to 2554 is about 470D (denier). On the other hand, the expansion ratio of the leak-proof wall elastic member 2556 that is disposed so as to overlap the folding joint portion 2061 in the lateral direction and the leak-proof wall elastic member 2555 that is disposed on the inner side in the lateral direction than the folding joint portion 2061 is about 3.0 times. The fiber diameter of the leak-proof wall

elastic members

2555 and 2556 is about 940D (denier).

As a result, in the diaper 2002, the sum of the stresses of the leakproof wall elastic members 2551 to 2554 in the region outside in the lateral direction from the folded joint portion 2061 of the leakproof wall 2050 is the same as that of the folded joint portion 2061 of the leakproof wall 2050 and the folded portion. It is smaller than the sum of stresses of the leak-proof wall

elastic members

2555 and 2556 in the inner region in the lateral direction from the joint portion 2061.

Note that the “sum of stresses” can be measured, for example, by performing the following test. First, the leak-proof wall 2050 is pulled in the longitudinal direction and is stretched to such an extent that the surface cannot be wrinkled. In this state, the leak-proof wall 2050 and the leak-proof wall elastic members 2551 to 2554 are cut out at a predetermined length le1 in the longitudinal direction to obtain test pieces. Since the test piece is cut in the stretched state, the test piece is kept for a predetermined time (a predetermined time) so that there is no difference between the test pieces due to the influence of the variation when the leak-proof wall elastic members 2551 to 2554 contract or the residual stress. For example, about 1 day). After being allowed to stand, the length le2 in the longitudinal direction of the contracted test piece is measured. Thereafter, a predetermined position of the end portion in the longitudinal direction of the test piece is fixed with a chuck of a tensile tester, and a stress value is measured when the test piece is pulled by the contracted length (ie, le1-le2). As a result, a “stress sum” is obtained.

Note that the above relation (the sum of the stresses of the leak-proof wall elastic member 2055 in the region outside in the lateral direction from the folding joint portion 2061 of the leak-proof wall 2050 <the folding joint portion 2061 and the folding joint portion 2061 of the leak-proof wall 2050 As long as the sum of the leak-proof wall elastic members 2055 in the inner region in the horizontal direction is satisfied, the arrangement, quantity, expansion ratio, and fiber diameter of the leak-proof wall elastic members 2055 can be freely changed.

<Characteristics of diaper 2002>
By having such a configuration, the diaper 2002 has a unique effect when worn. FIG. 23 is a schematic cross-sectional view of a diaper 2002 formed in a pants shape when viewed from the lateral direction.

In the pant-type diaper 2002, the leak-proof wall 2050 is contracted between the abdominal end joint portion 2063f and the back-end end joint portion 2063b by the expansion and contraction force of the leak-proof wall elastic members 2551-556, as shown in FIG. Stand up on the skin side of the wearer. At this time, the contraction force F1 by the leak-proof wall elastic members 2551 to 2556 is applied to the lower end 2063fed of the abdominal end joint 2063f, and the absorbent main body 2010 is pulled inward in the front-rear direction (front side to rear side) at the site. It is done. Similarly, the contraction force F2 by the leak-proof wall elastic members 2551 to 2556 acts on the lower end 2063bed of the back end joint portion 2063b, and the absorbent main body 2010 is pulled inward in the front-rear direction (from the rear side to the front side). It is done.

In general pants-type diapers, when the wearer is sleeping in a supine posture while wearing a diaper, excrement that cannot be absorbed by the absorbent main body is absorbed by the absorbent main body on the back side of the wearer. There is a risk of leakage from the upper end to the outside of the diaper.

In contrast, in the diaper 2002, the dorsal upper end portion of the absorbent main body 2010 is pulled inward in the front-rear direction (that is, the skin side of the wearer) by the contraction force F2, so that the dorsal upper end portion becomes the wearer. It will be easier to fit your body. That is, a gap or the like is hardly formed between the back side upper end portion of the absorbent main body 2010 and the wearer's skin, and it is easy to suppress excrement from leaking from the back side upper end portion of the absorbent main body 2010.

And in the diaper 2002, the lower end 2063bed of the back side end joint part 2063b is located above the lower end 2080bed of the main body back side upper part joint part 2080b in the vertical direction. That is, the absorbent main body 2010 and the back sheet 2030 are joined in a state of being stacked via the main body belly side upper end joint portion 2080f at a position overlapping the lower end 2063bed of the back end joint portion 2063b in the vertical direction. Become. Therefore, the rigidity at the lower end 2063bed is high.

If the rigidity of the portion where the contraction force F2 due to the leak-proof wall elastic members 2551 to 2556 acts is low, the force that pulls the absorbent main body 2010 toward the skin of the wearer is easily dispersed, and the absorbent main body 2010 and the wearer It is difficult to prevent the excretion from leaking due to the formation of a gap between the skin and the formation of wrinkles. On the other hand, in the diaper 2002 of 3rd Embodiment, since the rigidity of the site | part to which contraction force F2 acts is high, contraction force F2 becomes easy to act directly as force which pulls the absorptive main body 2010 to a wearer's skin side. . Thereby, the fitting property in the back side upper end part of the absorptive main body 2010 becomes higher, and the leakage of excrement in the back side upper end part can be effectively suppressed.

Furthermore, in the diaper 2002, leak-proof wall elastic members 2551 to 2556 are arranged in a state of extending along the longitudinal direction of the leak-proof wall 2050 at the lower end 2063bed of the back end joint portion 2063b. In other words, the contraction force F2 by the leak-proof wall elastic members 2551 to 2556 directly acts on the lower end 2063bed without interruption. Therefore, compared with the case where the contraction force by the leak-proof wall elastic members 2551 to 2556 is interrupted, the leak-proof wall 2050 is easily pulled toward the skin side of the wearer. That is, the contraction force F2 due to the leak-proof wall elastic members 2551 to 2556 acts directly on the absorbent main body 2010 via the lower end 2063bed of the back end joint portion 2063b, so that the absorbent main body 2010 becomes the skin side of the wearer. Thus, it is possible to improve the fit at the upper end of the back side of the absorbent main body 2010.

In addition, if it is the structure of the diaper 2002 shown by FIG. 22, the effect equivalent to a back side can be acquired also on the ventral side. That is, the fit at the abdominal side upper end of the absorbent main body 2010 is improved, and a gap is less likely to occur between the abdominal side upper end and the wearer's abdomen. Thereby, even if it is a case where a wearer is sleeping in a prone posture in the state where diaper 2002 was worn, a wearer can be controlled effectively.

Moreover, in the diaper 2002, the fit of the leak-proof wall 2050 when worn is improved. As described above, in the diaper 2002, the leak-proof wall elastic member 2055 disposed in the lateral outer side region (the region corresponding to the single layer portion 2054 in FIG. 15) of the leak-proof wall 2050 from the folded joint portion 2061. The sum of the stresses (2551 to 2554) is arranged in the folded joint portion 2061 of the leak-proof wall 2050 and the inner region in the lateral direction from the folded joint portion 2061 (region corresponding to the folded portion 2053 in FIG. 15). It is smaller than the sum of the stresses of the leak-proof wall elastic member 2055 (2555, 2556). Therefore, when the diaper 2002 is worn, a greater contraction force acts along the longitudinal direction in the folded portion 2053, so that the folded portion 2053 easily fits tightly on the wearer's skin, thereby causing side leakage of excrement. It can be effectively suppressed.

On the other hand, since the contraction force along the longitudinal direction of the single layer portion 2054 is weaker than that of the folding portion 2053, the single layer portion 2054 is slightly slackened in the longitudinal direction as compared with the folding portion 2053, and is easily deformed three-dimensionally. Yes. Therefore, the single layer portion 2054 can be easily fitted on the surface according to the unevenness of the wearer's body.

In particular, in the diaper 2002, the contraction force F2 by the leak-proof wall elastic member 2055 acts on the lower end 2063bed of the back side end joint portion 2063b, and the lower end 2063bed is longer than the lower end 2080bed of the main body back side upper end joint portion 2080b. It is in a high position in the direction (see FIGS. 22 and 23). In this case, the leak-proof wall 2050 rises to the wearer's skin side at a higher position in the vertical direction as compared with the diaper 2001 or the like of the second embodiment, and contacts the wider range of the wearer's body accordingly. Since it is easy, it is requested | required that it can deform | transform more flexibly according to the unevenness | corrugation of a wearer's body. On the other hand, in the leak-proof wall 2050 of the diaper 2002, since the single layer part 2054 is easy to deform | transform, favorable fitting property can be implement | achieved also with respect to the unevenness | corrugation of a body. In particular, it is easy to fit naturally even on a curved surface having large irregularities such as a collar.

(About elastic members)
In the above-described embodiment, the example in which the thread rubber is used as the waistline elastic member and the leak-proof wall elastic member has been described. However, these elastic members are not limited to a linear elastic member such as a so-called thread rubber. For example, a planar (strip-shaped) elastic member having a predetermined width may be used. Further, the sheet member constituting the leak-proof wall or the back sheet may be a stretchable sheet member (for example, a stretchable nonwoven fabric), so that an elastic member such as rubber thread need not be provided separately.

(About diaper folding)
The diaper 2001 and the diaper 2002 described above can be formed into a compact shape by folding the diaper 2001 and the diaper 2002 in the vertical direction when folded. FIG. 24 is a schematic cross-sectional view illustrating a folded diaper 2001 (diaper 2002).

The diaper 2001 (diaper 2002) is provided with a fold line FL along the horizontal direction at a predetermined position in the vertical direction, and the diaper 2001 (diaper 2002) of the pants type shape with the fold line FL as a folding base point is shown in FIG. It can be folded in half in the vertical direction. In FIG. 10, a pair of fold lines FL and FL are indicated by hatching lines at predetermined positions in the ventral waist part 2003 and the back waist part 2004. The fold line FL is provided along the horizontal direction at a position separated by a predetermined distance Lh from the upper end in the vertical direction (the ventral side end and the back side end in the longitudinal direction) of the diaper 2001 (diaper 2002). In addition, the predetermined distance Lh is a length of about ½ of the length of the pants-shaped diaper 2001 (diaper 2002) in the vertical direction (see FIGS. 10 and 11).

The folding line FL is arranged at a position where a part thereof overlaps with the absorbent body 2011 of the absorbent main body 2010 in the longitudinal direction (longitudinal direction). Accordingly, when the diaper 2001 is folded, the rigid absorbent body 2011 is easily folded and the folded state along the fold line FL is attached to the diaper 2001 so that the folded state can be easily maintained. . Specifically, in the manufacturing process of the diaper 2001, the product state (pants-shaped) diaper 2001 is folded at the fold line FL, and then subjected to local pressing in the thickness direction at the fold line FL. The process is performed, and the crease is firmly attached. Thereby, it is suppressed that the folded diaper 2001 returns to an original shape naturally, and it becomes easy to package compactly.

At this time, the fold line FL is formed so as not to overlap with the fold joint portion 2061 (that is, the fold portion 2053) of the leak-proof wall 2050 in the vertical direction (longitudinal direction). That is, in the diaper 2001 (diaper 2002), the fold line FL and the joint portion 2061 do not have overlapping portions in the vertical direction (see FIGS. 10 and 24). Therefore, even when the diaper 2001 (diaper 2002) is folded, the top surface portion 2051 is not creased at the position where the folded joint portion 2061 (folded portion 2053) is formed in the leak-proof wall 2050. . That is, at the position where the folding joint portion 2061 is formed, the top surface portion 2051 of the leak-proof wall 2050 can easily maintain a planar shape in the longitudinal direction and the width direction, and the top surface portion 2051 is worn by the wearer when the diaper 2001 is worn. The effect of fitting tightly to the body is hard to lose. In FIG. 24, the absorber 2011 and the leak-proof wall 2050 (joint portion 2061) are bent at the center position CL10 in the longitudinal direction, but a crease such as a fold line FL is attached at the center position CL10. Therefore, when the diaper 2001 is worn, the top surface portion 2051 of the leak-proof wall 2050 can easily maintain a planar shape.

Further, with such a configuration, the non-joining portion 2062 of the leak-proof wall 2050 and the fold line FL overlap in the vertical direction. That is, a crease is attached to any region of the non-joining portion 2062 of the leak-proof wall 2050. In this case, the non-joining portion 2062 is easily bent in the vertical direction (longitudinal direction) at the position where the crease is attached. On the other hand, when the non-joining portion 2062 is pressed along the lateral direction (width direction), the non-joining portion 2062 is hardly bent in the lateral direction. In the region between the fold lines FL and FL on the ventral side and the back side in the longitudinal direction (the region corresponding to the crotch portion 2005 in FIG. 10), the leakage preventing wall 2050 is set in the lateral direction in addition to the force by the press described above. Since the bending force does not easily act, the top surface portion 2051 of the leak-proof wall 2050 can more easily maintain a planar shape in the region of the crotch portion 2005.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1001 diapers (pants-type disposable diapers),
1003 ventral waist part, 1004 dorsal waist part, 1007 joining region,
1010 absorbent body, 1010e outermost end, 1011 absorbent core,
1011c Constricted portion 1020 Exterior body (exterior sheet), 1042 Back leg elastic member (elastic member),
1050 leak-proof wall, 1050BA lower end region,
1051 Top surface portion, 1052 Lower surface portion, 1055 Leg-around elastic member,
1061 joints, 1062 non-joints,
1101 1st latching | locking part, 1102 2nd latching | locking part,
1421 straight part, 1422 curved part,
1551-1556 1st-6th leg elastic,
P20 minimum position (position where the lateral length of the exterior sheet is minimum in the vertical direction),
2001 diapers (pants-type disposable diapers),
2002 diapers (pants-type disposable diapers),
2003 ventral waistline, 2003es ventral side edge,
2004 dorsal waistline, 2004es dorsal side edge,
2005 Inseam,
2010 absorbent body, 2010es outer end,
2011 absorber, 2011c constricted part, 2011ea end part, 2011eb end part,
2012 core wrap sheet,
2020 Top sheet (inner layer sheet), 2020es end,
2030 Back sheet (outer layer sheet), 2030c neck, 2030es outer edge,
2031 Back film, 2032 Upper outer layer sheet, 2033 Lower outer layer sheet,
2035a ventral waist elastic member, 2035b dorsal waist elastic member,
235 lg back leg elastic member, 2035 lgs straight part, 235 lgc curved part,
2050 leakage barrier,
2050s sheet member, 2050ei inner end, 2050eо outer end,
2050 rp base,
2051 Top surface portion, 2052 Lower surface portion, 2053 Folded portion, 2054 Single layer portion,
2055 leak-proof wall elastic member, 2551-2555 leak-proof wall elastic member,
2556 leakproof wall elastic member,
2061 Folding joint, 2062 Non-joining part,
2063 end joint, 2063f ventral end joint,
2063b Dorsal end joint, 2063beu upper end, 2063beds lower end,
2070 leak-proof film,
2080 main body joint, 2080f main body ventral upper end joint, 2080c main body central joint,
2080b main body back side upper end joint, 2080beu upper end, 2080bed lower end,
f1, f2, f3 fold line,
FL folding line,
BH waist opening, LH leg opening,
CL10 center position,
W50 interval (folded joint),
W80c width, W80e width,
Ws30 lateral distance, Ws50 lateral distance,

Claims

A longitudinal direction and a transverse direction intersecting the longitudinal direction,
An absorbent body that absorbs excreta;
One end side in the longitudinal direction of the absorbent main body is joined, and when worn, a ventral waist part located on the abdomen side of the wearer,
The other end side in the longitudinal direction of the absorbent main body is joined, and when worn, the back waistline portion located on the back side of the wearer,
A pants-type disposable diaper with
An exterior sheet is provided on the non-skin side of the absorbent main body,
Leak-proof walls along the longitudinal direction are provided on both sides of the absorbent main body in the lateral direction,
The leak-proof wall has a joint portion in which surfaces on one side in the thickness direction are joined at least at a position where the length in the lateral direction of the exterior sheet is minimum in the longitudinal direction, and the longitudinal direction. In the region above the joint in the non-joint portion where the surfaces in the thickness direction are not joined,
When the exterior sheet and the leak-proof wall are extended outward in the lateral direction so that the lateral length of the exterior sheet and the lateral length of the leak-proof wall are maximized, At the minimum position, the amount of protrusion of the outer sheet from the outermost end of the absorbent main body to the outside in the lateral direction is smaller than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. A pants-type disposable diaper characterized by that.
The pants-type disposable diaper according to claim 1,
The lateral end of the ventral waistline and the lateral end of the back waistline are locked by the first locking part along the longitudinal direction,
The other end portion in the lateral direction of the ventral side waistline portion and the other end portion in the lateral direction of the back side waistline portion are locked by the second locking portion along the vertical direction,
In the longitudinal direction, below the line connecting the lower end of the first locking part and the lower end of the second locking part, on the side of the ventral waist part in the joint part of the leak-proof wall A pants-type disposable diaper characterized in that the end is located.
The pants-type disposable diaper according to claim 1 or 2,
The lateral end of the ventral waistline and the lateral end of the back waistline are locked by the first locking part along the longitudinal direction,
The other end portion in the lateral direction of the ventral side waistline portion and the other end portion in the lateral direction of the back side waistline portion are locked by the second locking portion along the vertical direction,
In the longitudinal direction, below the line connecting the lower end of the first locking portion and the lower end of the second locking portion, on the side of the back waistline portion in the joint portion of the leak-proof wall. A pants-type disposable diaper characterized in that the end is located.
A pants-type disposable diaper according to claim 3,
The leak-proof wall is bent from the lateral outer side to the inner side, the skin-side surface of the absorbent main body is opposed to the thickness direction, and the lateral direction is folded from the lateral inner side to the outer side. And a top surface portion superimposed on the skin side surface of the lower surface portion,
At least on the back waistline side in the longitudinal direction of the leak-proof wall, in the region above the non-joining portion in the longitudinal direction and in the region outside in the lateral direction from the joining portion, the absorption The skin side surface of the adhesive main body and the non-skin side surface of the lower surface portion are joined, and the skin side surface of the lower surface portion and the non-skin side surface of the top surface portion are joined. A pants-type disposable diaper.
The pants-type disposable diaper according to claim 4,
The joint portion between the skin-side surface of the lower surface portion and the non-skin-side surface of the top surface portion is located apart from the laterally outward position by a predetermined distance from the laterally-inwardly folded position. A pants-type disposable diaper characterized by
The pants-type disposable diaper according to claim 4 or 5,
Having a joining region for joining the absorbent main body and the exterior sheet in the thickness direction;
The joining region has a portion in which the width in the transverse direction is narrower than the width in the transverse direction at both ends in the longitudinal direction of the absorbent main body in the lower end region of the leak-proof wall in the longitudinal direction. Characteristic pants-type disposable diapers.
A pants-type disposable diaper according to any one of claims 1 to 6,
Leak-proof walls along the longitudinal direction are provided on both sides of the absorbent main body in the lateral direction,
The leak-proof wall has a joint portion in which surfaces on one side in the thickness direction are joined at least at a position where the length in the lateral direction of the exterior sheet is minimum in the longitudinal direction, and the longitudinal direction. In the region above the joint in the non-joint portion where the surfaces in the thickness direction are not joined,
A main body bonding portion for bonding the absorbent main body to the exterior sheet;
The width in the lateral direction of the main body joint at least at the minimum position is narrower than the width in the lateral direction of the main body joint at both longitudinal positions of the main body joint,
Of the leakage barrier, at least one of the non-skin side portion of the joint portion and the portion located on the non-skin side of the portion where the joint portion is provided, along the longitudinal direction. Having an elastic member,
A pants-type disposable diaper characterized by that.
The pants-type disposable diaper according to claim 7,
The said elastic member is the non-skin side of the said junction part, Comprising: It is provided in the position which overlaps with the said junction part in thickness direction, The pants type disposable diaper characterized by the above-mentioned.
A pants-type disposable diaper according to any one of claims 1 to 8,
A straight portion disposed along the lateral direction so as to overlap the absorbent main body in the thickness direction, and from both lateral ends of the linear portion toward the outer side in the lateral direction and the upper side in the vertical direction. An elastic member having a curved portion arranged in a curved manner is provided on the back side,
The pants-type disposable diaper, wherein the joint portion and the elastic member have portions that overlap each other in the thickness direction.
The pants-type disposable diaper according to claim 9,
A pants-type disposable diaper, wherein an extension magnification of the curved portion is larger than an extension magnification of the linear portion.
A pants-type disposable diaper according to any one of claims 1 to 10,
The leak-proof wall is provided with a plurality of leg-hole elastic members extending and contracting in the longitudinal direction in a row in the lateral direction,
In the lateral direction, the number of the leg-holes elastic members disposed outside the joints is greater than the number of the leg-holes elastic members disposed inside the joints and the joints. Characteristic pants-type disposable diapers.
The pants-type disposable diaper according to claim 11,
A pants-type disposable diaper characterized in that, in the lateral direction, the leg-holes elastic member disposed outside the joint is colored.
A pants-type disposable diaper according to any one of claims 1 to 12,
The absorbent body has an absorbent core along the longitudinal direction;
The absorbent core has a constricted portion between one end and the other end in the longitudinal direction,
In the thickness direction, the joint does not overlap with the absorbent core,
In the lateral direction, the distance between the one joining portion and the other joining portion is the length in the transverse direction at the one end portion of the absorbent core and the transverse direction at the other end portion of the absorbent core. A pants-type disposable diaper characterized by being shorter than the length of.