JP6412896B2 - Pants-type disposable diapers - Google Patents

Description

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

  2. Description of the Related Art Conventionally, as disposable diapers, those provided with a leak-proof wall for preventing lateral 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, front in the longitudinal direction It has a non-joining part where the surfaces in the thickness direction are not joined to each other in a region above the joining part, and the lateral length of the exterior sheet and the lateral length of the leak-proof wall The outer sheet from the outermost end of the absorbent main body in the lateral direction at the minimum position when the exterior sheet and the leak-proof wall are extended outward in the lateral direction so that the The pants-type disposable diaper is characterized in that a protruding amount to the outside of the sheet is smaller than a protruding amount to the outside of the leak-proof wall from the outermost end. 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 a wearer to pass a leg while wearing while suppressing 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. 3A is a schematic cross-sectional view taken along line AA in FIG. 2, FIG. 3B is a schematic cross-sectional view taken along line BB in FIG. 2, and FIG. 3C 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. 6A to 6C 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. 6A is a diaper according to this embodiment, FIG. 6B is a diaper according to another example, and FIG. 6C is a diaper according to another example. Shows the case. It is explanatory drawing explaining the wearing condition of a diaper.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

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, In 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 less than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. ,
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. The end is located,
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 <br / > A pants-type disposable diaper characterized by that.

  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 joint part which has rigidity does not exist in a bending position, the discomfort to a wearer's skin can be reduced at the time of wear of a diaper.

  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 preferable 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 portion 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.

=== Embodiment ===
As an example of a pants-type disposable diaper according to the present invention (hereinafter simply referred to as diaper 1), a pants-type disposable diaper mainly intended for elderly people will be described.

(Overall configuration of diaper 1)
First, the whole structure of the diaper 1 is demonstrated with reference to FIG.1, FIG.2 and FIG.

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

  The diaper 1 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. 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 1, 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 respective members constituting the diaper 1 are stacked, and the side in contact with the wearer's skin when the wearer wears the diaper 1 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, when the diaper 1 is worn, the abdomen waistline part 3 positioned on the wearer's stomach side, the backside waistline part 4 positioned on the wearer's back side, and the inseam of the wearer And a crotch portion 5 located. 2 and 3A to C, the diaper 1 includes a strip-shaped absorbent main body 10 that absorbs excrement such as urine, and an exterior as an exterior sheet provided on the non-skin side of the absorbent main body 10. A body 20, and the exterior body 20 includes a ventral waist part 3, a back waist part 4, and a crotch part 5.

  As shown in FIG. 2, in the state where the diaper 1 is unfolded and extended, the absorbent main body 10 has one end in the longitudinal direction joined to the ventral waist part 3 and the other end in the longitudinal direction is the back waist part 4. It is joined to. That is, the absorptive main body 10 is provided so as to be bridged between the ventral waist part 3 and the back waist part 4. The crotch part 5 is disposed between the ventral waist part 3 and the back waist part 4.

  Here, the “extended state” of the diaper 1 is a state in which each elastic member provided on the diaper 1 is extended so that the entire diaper 1 (product) is fully extended, specifically, the diaper 1 is A state in which each member (for example, a sheet member constituting the abdominal waist part 3 or the back waist part 4) is stretched until the dimensions thereof are equal to or close to the dimensions of the member itself. .

  In the diaper 1, the absorbent main body 10 and the exterior body 20 are folded in two from the unfolded state shown in FIG. 2, with a predetermined position CL10 (indicated by a one-dot chain line in FIG. 2) in the longitudinal direction of the absorbent main body 10 as the folding position. In the folded state, the first locking portion 101 along the vertical direction locks the lateral end of the abdominal waistline 3 and the lateral end of the dorsal waistline 4 in the vertical direction. The other end portion in the lateral direction of the abdominal side waistline portion 3 and the other end portion in the lateral direction of the back side waistline portion 4 are latched by the second locking portion 102 along the side. Thereby, the abdominal side waistline part 3 and the back side waistline part 4 are connected in an annular shape, and one waistline opening 1HB and a pair of leghole openings 1HL as shown in FIG. 1 are formed to form a pants-type diaper.

  As shown in FIG. 2, the first locking portion 101 includes a ventral first locking region 301 provided from the upper end to the lower end of the abdominal waistline portion 3, and the upper end to the lower end of the backside waistline portion 4. The back side 1st latching area | region 401 provided over was joined. Similarly, the second locking portion 102 is provided from the upper end to the lower end of the ventral side waist portion 4 and the abdominal second locking region 302 provided from the upper end to the lower end of the ventral waist portion 3. The formed dorsal side second locking region 402 is joined. As a joining means of the 1st locking part 101 and the 2nd locking part 102, welding etc. are mentioned, for example.

(Configuration of the absorbent main body 10)
The absorptive main body 10 has a substantially rectangular shape in plan view as shown in FIG. 2 and is provided at the center in the horizontal direction. The absorbent main body 10 has an absorbent core 11 along the longitudinal direction, a top sheet 12 disposed on the skin side of the absorbent core 11, a back sheet 13 disposed on the non-skin side of the absorbent core 11, and have. The top sheet 12 and the back sheet 13 are shown in FIGS.

  The absorbent core 11 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 superabsorbent polymer (SAP). As shown in FIG. 2, the absorbent core 11 has a substantially hourglass shape in plan view, and includes a constricted portion 11 c between one end portion 11 ea and the other end portion 11 eb in the longitudinal direction. As can be seen by comparing FIG. 3B and FIG. 3C, the constricted portion 11c has a lateral dimension smaller than the lateral dimensions of the one end portion 11ea and the other end portion 11eb (W11ea, W11eb in FIG. 5). 3B schematically shows a cross section in the thickness direction of the abdominal waistline portion 3 including the one end portion 11ea of the absorbent core 11, and the back side including the other end portion 11eb of the absorbent core 11. The same applies to the waistline 4 side.

  In this embodiment, the outer peripheral surface of the absorbent core 11 is covered with a core wrap sheet 110 made of a liquid-permeable sheet member such as tissue paper or nonwoven fabric, as shown in FIGS. 3B and 3C. Therefore, in the longitudinal direction of the absorbent main body 10, in the region where the constricted portion 11c is formed, the lateral end of the absorbent core 11 and the core wrap sheet 110 in the lateral direction are compared to the one end portion 11ea and the other end portion 11eb. The distance between is long. In FIG. 3B, the core wrap sheet 110 is in contact with the lateral end of the absorbent core 11, and the distance between the lateral end of the absorbent core 11 and the lateral direction of the core wrap sheet 110 is substantially 0 (zero). It is.

  The top sheet 12 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 13 is a liquid-impermeable sheet member for preventing liquid such as urine absorbed by the absorbent core 11 from leaking to the outside, and is formed of, for example, a resin film.

  On both sides of the absorbent main body 10 in the lateral direction, leak-proof walls 50 are provided along the longitudinal direction. The leak-proof wall 50 stands up from the lateral side end of the absorbent main body 10 toward the wearer's skin when the diaper 1 is worn, and excrement leaks out from the diaper 1 to the outside. It suppresses and constitutes a part of the outer edge of the leg opening 1HL (see FIG. 1). The detailed configuration of the leak-proof wall 50 will be described later.

(Configuration of exterior body 20)
The exterior body 20 is formed by stacking three sheet members, a first exterior sheet member 21, an abdominal second exterior sheet member 22a, and a back second exterior sheet member 22b. The first exterior sheet member 21, the ventral second exterior sheet member 22a, and the back second exterior sheet member 22b are each a flexible sheet member formed of, for example, a spunbond nonwoven fabric. In this embodiment, the exterior body 20 as an exterior sheet is formed by laminating a plurality of sheet members, but is not necessarily a laminate, and the exterior body 20 is formed by a single sheet member. May be.

  As shown in FIG. 2, the first exterior sheet member 21 is bound toward the inner side in the lateral direction in a region corresponding to the crotch portion 5, and has a substantially hourglass shape in plan view. At the position where the first exterior sheet member 21 is bound to the innermost side in the lateral direction, the lateral length of the entire exterior body 20 is minimum. In the following description, the position where the lateral length of the outer package 20 is minimum in the vertical direction of the diaper 1 (indicated by the alternate long and short dash line in FIG. 2) is simply referred to as “minimum position P20”.

  In addition, in the diaper 1 of the underpants type, it is desirable that the minimum position P20 is located on the front side (abdominal side) and the upper side of the position CL10 that is the lower end in the vertical direction. Thereby, since the width | variety of the horizontal direction of the exterior body 20 becomes large as it goes upwards in the back | dorsal side rather than the position P20 which becomes the minimum, it can cover with the exterior body 20 so that a wearer's buttocks may be wrapped. 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 5 of the diaper 1, and the uncomfortable feeling during wearing can be reduced.

  Further, as shown in FIG. 2, the exterior body 20 has a lateral width at a minimum position P20 that is smaller than the lateral width of the absorbent main body 10, that is, the exterior body 20 has a minimum position P20. In this case, it is desirable that the inner side of the absorbent main body 10 is further bound inside. As a result, even if the leg opening 1HL is looked into from the waist opening 1HB, the exterior body 20 is not visible at the minimum position P20, and the leakage preventing wall 50 is a part of the outer edge of the leg opening 1HL. Can be visually recognized, so that the wearer can be given an impression that it is easy to pass through the legs.

  3C is a schematic cross-sectional view when the diaper 1 is cut in the thickness direction at the minimum position P20. As shown in FIGS. 3A to 3C, the first exterior sheet member 21 is arranged on the non-skin side of the back sheet 13 of the absorbent main body 10.

  As shown in FIG. 3B, the abdominal second exterior sheet member 22a is disposed on the non-skin side of the first exterior sheet member 21 on the abdominal waistline portion 3 side. As shown in FIG. 2, the ventral second exterior sheet member 22 a is at a minimum position P <b> 20 from the lower end 301 u of the ventral first locking region 301 and the lower end 302 u of the ventral second locking region 302 in the vertical direction. 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 ventral second exterior sheet member 22a and the first exterior sheet member 21 in the thickness direction, a plurality of ventral waist elastic members 31 along the lateral direction are provided at intervals in the vertical direction. The plurality of belly side waistline elastic members 31 may be made of, for example, rubber thread or the like, and the belly side second exterior sheet member 22a and the first exterior sheet member 21 are stretched in the lateral direction at a predetermined expansion ratio. It is sandwiched and joined. These abdominal waistline elastic members 31 provide lateral stretchability to the abdominal waistline part 3.

  As shown in FIG. 3A, the back-side second exterior sheet member 22b is disposed on the non-skin side of the first exterior sheet member 21 on the back-side waistline portion 4 side. As shown in FIG. 2, the back-side second exterior sheet member 22 b has a minimum position P <b> 20 from the lower end 401 u of the back-side first locking region 401 and the lower end 402 u of the back-side second locking region 402 in the vertical direction. 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 22b and the 1st exterior sheet member 21, the back side waist elastic member 41 along the horizontal direction is provided with two or more at intervals in the vertical direction. The plurality of back-side waistline elastic members 41 can be made of, for example, rubber thread or the like. The back-side second exterior sheet member 22b and the first exterior sheet member 21 are stretched in the lateral direction at a predetermined expansion ratio. It is sandwiched and joined. The plurality of back waistline elastic members 41 imparts lateral stretchability to the back waistline portion 4.

  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.

  Further, a plurality of back-side leg-hole elastic members 42 are provided in the thickness direction between the back-side second exterior sheet member 22b and the first exterior sheet member 21 with a space in the vertical direction. The plurality of dorsal leg elastic members 42 are arranged in the lateral direction so as to overlap the absorbent main body 10 in the thickness direction, and laterally outward from both lateral ends of the linear part 421. And a curved portion 422 that is curved toward the upper side in the vertical direction. The straight portion 421 has a portion that overlaps the absorbent core 11 in the thickness direction. The straight portion 421 and the curved portion 422 are joined between the back-side second exterior sheet member 22b and the first exterior sheet member 21 in a state of being stretched at different stretching magnifications.

  In this embodiment, the expansion ratio of the curved portion 422 is larger than the expansion ratio of the linear portion 421. Although the curved portion 422 is disposed along the lateral outer edge of the back-side second exterior sheet member 22b, this region where the curved portion 422 is disposed contacts the wearer's buttocks when the diaper 1 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 422 larger than the expansion magnification of the linear portion 421, it is possible to increase the contraction force of the back leg elastic member 42 in the bending portion 422 and to prevent positional displacement.

  In addition, the contraction force of the back leg elastic member 42 in the curved portion 422 increases the amount of contraction of the exterior body 20 in the vicinity of the leg opening 1HL, so that the exterior body 20 is 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 422 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 suppress the absorbent core 11 from being excessively contracted by making the expansion ratio of the linear portion 421 having a portion overlapping the absorbent core 11 in the thickness direction smaller than the expansion ratio of the curved portion 422. it can. Note that, similarly to the curved portion 422, the expansion ratio of the linear portion 421 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, if the expansion ratio at the central portion in the horizontal direction of the straight portion 421 is smaller than the expansion magnification at both ends in the horizontal direction, the stress is gradient in the horizontal direction of the straight portion 421, so that the fit property is impaired. Therefore, excessive shrinkage of the absorbent core 11 can be suppressed.

(Configuration and function of leak-proof wall 50)
Next, the configuration and function of the leak-proof wall 50 will be described with reference to FIGS. 4, 5, 6 </ b> A to C and FIG. 7 in addition to FIGS. 2 and 3 </ b> A to C.

  FIG. 4 is a schematic plan view showing the leak-proof wall 50 and the absorbent main body 10 in a developed and extended state. FIG. 5 is an enlarged schematic view of a D part in FIG. 3C. 6A to 6C, the exterior body 20 and the leak-proof wall 50 are extended outward in the lateral direction so that the lateral length of the exterior body 20 and the lateral length of the leak-proof wall 50 are maximized. FIG. 6A is a schematic cross-sectional view in the thickness direction at the minimum position P20 in the case, FIG. 6A is a diaper 1 according to this embodiment, FIG. 6B is a diaper according to another example, and FIG. The case of the diaper which concerns on another example is shown. FIG. 7 is an explanatory diagram for explaining a wearing state of the diaper 1.

  The leakage preventing wall 50 is formed by folding a rectangular sheet member 50s as shown in FIG. 4 in the lateral direction along folding lines f1, f2, and f3 along the longitudinal direction. The sheet member 50s is a flexible sheet member such as a nonwoven fabric.

  A plurality of leg-hole elastic members 55 extending and contracting in the longitudinal direction are provided on the leak-proof wall 50 in a row in the lateral direction. In the present embodiment, as shown in FIG. 4, the six leg-hole elastic members 55 are joined to the sheet member 50 s (leakage prevention wall 50) in a state of being stretched at a predetermined stretch ratio in the longitudinal direction. . By the plurality of leg-hole elastic members 55, the leak-proof wall 50 is given stretchability along the longitudinal direction. In the following description, the six leg elastic members 55, the second leg elastic member 552, the third leg elastic member 553, the fourth leg elastic member 554, and the fifth leg elastic member 55, respectively. In some cases, the leg elastic member 555 and the sixth leg elastic member 556 may be described.

  As shown in FIG. 4, the sheet member 50 s (the leak-proof wall 50 in the unfolded and elongated state) has a lateral outer end 50 eo that protrudes outward in the lateral direction from the absorbent main body 10. The inner end portion 50ei is fixed to the lateral end portion of the absorbent main body 10. Specifically, as shown in FIGS. 3A to 3C, the lateral inner end portion 50ei of the sheet member 50s is joined between the absorbent core 11 and the backsheet 13 in the thickness direction.

  In this sheet member 50s, first, the outer end 50eo is bent inward in the lateral direction with the fold line f1 shown in FIG. 4 as a base point, and the first to sixth leg elastic members 551 to 556 are sandwiched therebetween. Thus, the sheet members 50s are joined to each other in the thickness direction. As a result, the sheet member 50s is in a two-layered state.

  Subsequently, the sheet member 50s in a state of being overlapped 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 the folding line f3 as a base point. Bend towards the skin side and laterally inside. As a result, as shown in FIGS. 3A to 3C and FIG. 5, the leakage preventing wall 50 is formed in which the cross section in the thickness direction is bent into a substantially S shape. As shown in FIG. 5, the position of the fold line f <b> 3 becomes a base 50 rp when the leak-proof wall 50 is erected. In addition, the leak-proof wall 50 does not necessarily need to be formed by 2 sheets of overlap (multilayer), and may be formed by the single layer like the schematic diagram shown to FIG.

  As shown in FIG. 5, the leak-proof wall 50 formed by the above-described procedure is such that the sheet member 50 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 10 is The sheet member 50s is bent from the inner side to the outer side in the lateral direction with the lower surface portion 52 facing the surface (the surface on the skin side of the top sheet 12) in the thickness direction and the fold line f2 as a base point. And a top surface portion 51 superimposed on the surface.

  As shown in FIG. 5, the leak-proof wall 50 has a non-skin-side surface 51b of the top surface portion 51 and a skin-side surface 52a of the lower surface portion 52 joined together, that is, one side in the thickness direction of the sheet member 50s. It has the junction part 61 to which these surfaces were joined. The joining portion 61 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.

  The joining portion 61 does not necessarily have to join the entire non-skin-side surface 51b of the top surface portion 51 and the entire skin-side surface 52a of the bottom surface portion 52, and part of the top surface portion 51 and the bottom surface portion 52. In this area, the joining portion 61 may be formed so as to join the non-skin-side surface 51b of the top surface portion 51 and the skin-side surface 52a of the bottom surface portion 52. For example, in the lateral direction, the joining portion 61 may not be formed at the position of the inner end of the leak-proof wall 50 (the position of the bending line f2 shown in FIG. 5). As shown in FIG. 5, the top surface portion 51 and the bottom surface portion 52 are not joined and can be detached in the laterally outer region where the joining portion 61 is not formed.

  As shown in FIG. 2, the joining portion 61 is provided along the longitudinal direction in a region corresponding to the constricted portion 11 c of the absorbent core 11 in the longitudinal direction of the leak-proof wall 50. And the leak-proof wall 50 is joined to the area | region of the outer side of the junction part 61 in a longitudinal direction, ie, the area | region above the junction part 61 in the longitudinal direction of the diaper 1, and the thickness direction surfaces of the sheet | seat member 50s are joined. The non-joining part 62 is not provided. In addition, the junction part 61 should just be provided in the position P20 used as the minimum located in a wearer's crotch at the time of wearing of the diaper 1. FIG.

  As shown in FIG. 7, in the wearing state of the diaper 1, the top surface part 51 arrange | positioned most skin side among the leak-proof walls 50 contacts a wearer's body. Of the top surface portion 51, the region where the joint portion 61 is provided is joined in a state where the top surface portion 51 and the lower surface portion 52 are laminated by the joint portion 61, and thus compared with the region where the joint portion 61 is not provided. And the rigidity is high. Thereby, in the area | region in which the said junction part 61 was provided, since the leak-proof wall 50 is hard to deform | transform and it can press and fit to a wearer's skin firmly, there is a clearance gap between the diaper 1 and skin. It is difficult to occur, and it is possible to suppress the side leakage of excrement.

  In the present embodiment, the joint portion 61 and the back leg elastic member 42 have portions that overlap each other in the thickness direction. That is, when the diaper 1 in the unfolded state is viewed in the thickness direction, the joining portion 61 intersects with the back leg elastic member 42 (straight line portion 421). Due to (elastic force in the curved portion 422), the joint portion 61 is pulled upward obliquely upward in the lateral direction so as to follow the shape of the wearer's buttocks. Therefore, it becomes difficult to produce a gap between the joint portion 61 and the wearer's skin (in the crotch portion). As described above, the joining portion 61 in which the expansion ratio of the curved portion 422 is larger than the expansion ratio of the linear portion 421 is more desirable because it is pulled more strongly diagonally upward toward the outer side in the lateral direction.

  And since the non-joining part 62 is provided in the area | region above the junction part 61 in the vertical direction, in a crotch part, a wearer is suppressing the leakage of excrement by the junction part 61 as mentioned above. Since the non-joint part 62 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. 6A, the exterior body 20 and the leak-proof wall 50 are moved outward in the lateral direction so that the lateral length of the exterior body 20 and the lateral length of the leak-proof wall 50 are maximized. At the position P20 that becomes the minimum when extended, the protruding amount W21 of the exterior body 20 (first exterior sheet member 21) from the outermost end 10e of the absorbent main body 10 in the lateral direction is absorbed in the lateral direction. The amount of protrusion W50 from the outermost end 10e of the main body 10 to the outside of the leakage preventing wall 50 is smaller (W21 <W50).

  Here, “when the exterior body 20 is extended outward in the lateral direction so that the lateral length of the exterior body 20 is maximized” means that the ventral waist elastic member 31 provided in the exterior body 20. By extending the back side waistline elastic member 41 and the back leg circumference elastic member 42, the first exterior sheet member 21, the abdominal side second exterior sheet member 22a, and the back side second exterior that constitute the exterior body 20 This is when the sheet member 22b is stretched without undulation until each dimension of the sheet member 22b is equal to or close to the dimension of the single member.

  Similarly, “when the leak-proof wall 50 is extended outward in the lateral direction so that the lateral length of the leak-proof wall 50 is maximized” refers to the skin of the wearer with the base 50rp as a base point. The leakage prevention wall 50 that has stood up is pulled to the outside in the lateral direction until it becomes substantially parallel to the exterior body 20 that has been extended to the outside in the lateral direction, and is extended without wrinkles. In addition, since the leak-proof wall 50 has the partial area | region of the top | upper surface part 51 and the lower surface part 52 mutually joined by the junction part 61, the said length when the length of the horizontal direction of the leak-proof wall 50 becomes the maximum. The length D50 (see FIGS. 6A to 6C) is shorter than the lateral length D500 (see FIG. 4) of the sheet member 50s by the amount joined by the joining portion 61 (D50 <D500).

  In addition, in order to minimize the influence of the elastic force of the plurality of leg-hole elastic members 55 provided on the leak-proof wall 50, the plurality of leg-hole elastic members 55 are also elongated in the longitudinal direction, so that the leak-proof wall 50 is It is desirable that the sheet member 50s constituting the sheet member 50s should be stretched without any hindrance until the longitudinal dimension of the sheet member 50s is equal to or close to the longitudinal dimension of the single member. In the following description, the exterior body 20 and the leak-proof wall 50 are extended outward in the lateral direction so that the lateral length of the exterior body 20 and the lateral length of the leak-proof wall 50 are maximized. This time is simply referred to as “at maximum extension”.

  The leak-proof wall 50 is a part of the outer edge portion of the leg-hole opening 1HL (see FIG. 1) for allowing the wearer's leg to pass, and the leak-proof wall 50 is the exterior body 20 (first 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 21), the position of the leg opening 1HL is difficult to visually recognize by the exterior body 20. In this situation, when the wearer tries to pass the leg through the leg opening 1HL, the leg is placed on the leak-proof wall 50 in a state of being contracted along the leg opening 1HL by the elastic force of the plurality of leg elastic members 55. 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 10e of the absorbent main body 10 to the outside of the leak-proof wall 50 in the lateral direction is the outer package 20 (first Since the leakage prevention wall 50 protrudes outward in the lateral direction from the exterior body 20 by increasing the protrusion amount W21 to the outside of the exterior sheet member 21), the wearer wears the diaper 1 around the leg. It becomes easy to visually recognize the position of the opening 1HL. Therefore, since the wearer can pass the leg after firmly recognizing the position of the leg opening 1HL, the leg is less likely to be caught on the leak-proof wall 50, and the leg is easy to pass.

  In the present embodiment, the lateral end 50e of the leak-proof wall 50 protrudes outward in the lateral direction from the outermost end 10e of the absorbent main body 10 at the minimum position P20. On the other hand, at the minimum position P20, the lateral position of the lateral end 21e of the first exterior sheet member 21 (exterior body 20) is the same as the lateral position of the outermost end 10e of the absorbent main body 10, The first exterior sheet member 21 does not project laterally outward from the outermost end 10e of the absorbent main body 10, and the projection amount W21 of the first exterior sheet member 21 is 0 (zero). Therefore, in FIG. 6A, W21 is indicated by an arrow.

  In addition, the 1st exterior sheet member 21 does not need to be the same as the position of the horizontal direction of the outermost end 10e of the absorptive main body 10 in the horizontal position of the horizontal end 21e in the minimum position P20. For example, as in another example shown in FIG. 6B, the position of the lateral end 21 e of the first exterior sheet member 21 may protrude outward from the position of the outermost end 10 e of the absorbent main body 10 in the lateral direction. In this case, the protrusion amount W21 of the first exterior sheet member 21 from the outermost end 10e of the absorbent main body 10 to the laterally outer side takes a positive value. Further, as in another example shown in FIG. 6C, the lateral end 21 e of the first exterior sheet member 21 may be located on the inner side of the position of the outermost end 10 e of the absorbent main body 10 in the lateral direction. Good. In this case, the protrusion amount W21 of the first exterior sheet member 21 from the outermost end 10e of the absorbent main body 10 to the laterally outer side 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 61 has a longitudinal end 61 a below the line UL <b> 3 connecting the lower end 301 u of the ventral first locking region 301 and the lower end 302 u of the ventral second locking region 302. The other end 61b in the longitudinal direction is located below the line UL4 connecting the lower end 401u of the back side first locking region 401 and the lower end 402u of the back side second locking region 402. It is desirable. That is, in the vertical direction, below the line connecting the lower end of the first locking portion 101 and the lower end of the second locking portion 102, on the side of the ventral waist part 3 in the joint portion 61 of the leak-proof wall 50. It is desirable that the end (one end 61a) and the end (the other end 61b) on the back waistline portion 4 side are located.

  This is because, in the longitudinal direction, one end 61a in the longitudinal direction of the joint portion 61 is positioned above the line UL3 connecting the lower end 301u of the abdominal side first locking region 301 and the lower end 302u of the abdominal side second locking region 302. In other words, when the rigid joint 61 is positioned on the ventral waist part 3, when the wearer passes the leg through the leg opening 1HL, the fingertip of the leg may be caught on the joint 61. There is sex. Therefore, in the vertical direction, by not positioning the joint 61 on the ventral waist part 3, a situation in which the fingertip of the leg is caught on the joint 61 is suppressed, and the wearer can easily pass the leg.

  Further, in the vertical direction, the other end 61b in the longitudinal direction of the joint portion 61 is above the line UL4 connecting the lower end 401u of the back-side first locking region 401 and the lower end 402u of the back-side second locking region 402. In other words, since the joint portion 61 having rigidity is not located in the back waistline portion 4, it is difficult for the joint portion 61 to bite into the wearer's buttocks and back, and more flexible. Since the non-joining part 62 which has has contact with a wearer's skin, the touch becomes favorable and the discomfort and discomfort at the time of wearing of the diaper 1 can be suppressed.

  In the present embodiment, as shown in FIG. 2, the joining portion 61 does not overlap with the absorbent core 11 in the thickness direction, and as shown in FIG. 4, one joining portion 61 and the other in the lateral direction. The distance W61 from the joining portion 61 is shorter than the lateral length W11ea at the one end portion 11ea in the longitudinal direction of the absorbent core 11 and the lateral length W11eb at the other end portion 11eb (W61 <W11ea, W61 < W11eb).

  In other words, the rigid joined portion 61 is disposed on the outer side in the lateral direction of the constricted portion 11c of the absorbent core 11, and has a portion where the flexible non-joined portion 62 overlaps the absorbent core 11. Therefore, the situation where the joint 61 is pressed against the skin of the wearer by the absorbent core 11 having a thickness to deteriorate the touch when the diaper 1 is worn is suppressed. And since the non-joining part 62 contacts a wearer's skin, while the touch at the time of wearing of the diaper 1 becomes favorable, it becomes easy to deform | transform the leak-proof wall 50 according to a wearer's body shape. However, the absorptive core 11 necessarily has the constricted part 11c, and the joining part 61 does not need to be disposed in the space portion formed outside the constricted part 11c in the lateral direction.

  As shown in FIG. 5, among the plurality of leg-hole elastic members 55 provided on the leak-proof wall 50, the first to fifth leg-hole elastic members 551 to 555 are provided on the top surface portion 51, and in the lateral direction. In addition, one fifth leg-hole elastic member 555 is disposed on the inner side of the joint portion 61, and four first to fourth leg-hole elastic members 551 to 554 are disposed on the outer side of the joint portion 61. Therefore, in the lateral direction, the number of leg-hole elastic members 55 arranged outside the joint portion 61 is larger than the number of the leg-hole elastic members 55 arranged inside the joint portion 61 and the joint portion 61.

  In the lateral direction of the leak-proof wall 50, the sheet member 50 s is turned over when the diaper 1 is worn because the region outside the region where the joint 61 is provided has lower rigidity than the region where the joint 61 is provided. It is easy to bend and bend. However, in the diaper 1, as shown in FIG. 7, in the lateral direction of the leak-proof wall 50, the joint 61 has a rigid leg-hole elastic member 55 in a region outside the region where the joint 61 is provided. By arranging more than the provided area | region, the rigidity in the said outer side 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 51, and leads to an improvement of fit property.

  In addition, in the horizontal direction of the leak-proof wall 50, it is desirable that the first to fourth leg-hole elastic members 551 to 554 arranged in a region outside the region where the joint portion 61 is provided are colored. This is because when the diaper 1 is worn, the leak-proof wall 50 is conspicuous in appearance, and the leg opening 1HL (see FIG. 1) is more easily visible.

  As shown in FIG. 5, the lower leg portion 52 is provided with a fifth leg-hole elastic member 555 and a sixth leg-hole elastic member 556. Here, the fifth leg-hole elastic member 555 is provided at both the top surface portion 51 and the lower surface portion 52 because it is provided at substantially the same position as the position of the folding line f2.

  As shown in FIGS. 2 and 3A, the skin-side surface and the lower surface portion 52 of the absorbent main body 10 (top sheet 12) are not covered by the lower end joint portion 631 at both ends in the longitudinal direction of the leak-proof wall 50. The skin-side surface is joined, and the skin-side surface of the lower surface portion 52 and the non-skin-side surface of the top surface portion 51 are joined by the upper end joint portion 632. As shown in FIG. 2, the lower end joint portion 631 and the upper end joint portion 632 are arranged in a region on the upper side in the vertical direction with respect to the non-joint portion 62 and in a region on the outer side in the lateral direction with respect to the joint portion 61. Yes.

  In this embodiment, the lower end joint portion 631 and the upper end joint portion 632 are provided at both ends in the longitudinal direction of the leak-proof wall 50, but at least on the back waistline portion 4 side, The end joint portion 631 and the upper end joint portion 632 may be provided in a region on the upper side in the vertical direction from the non-joint portion 62 and in a region on the outer side in the lateral direction from the joint portion 61.

  If the joint portion 61 is provided up to the upper end portion of the back waistline portion 4, the joint portion 61 having rigidity is further more than the apex t (see FIG. 7) of the protrusion of the wearer's buttocks. Easily shifts inward and easily bites into the buttocks. However, the end on the back side in the longitudinal direction of the leak-proof wall 50 is fixed to the absorbent main body 10 outside the joint 61 in the lateral direction by the lower end joint 631 and the upper end joint 632. Thus, the non-joining portion 62 is provided so as to spread from the inner side toward the outer side in the lateral direction.

  Thereby, the non-joining part 62 which has flexibility fits the shape of the collar part in the laterally outer side than the apex part t of the projecting part of the collar part, and suppresses the displacement of the joint part 61 inward in the lateral direction and the biting into the collar part. be able to. Moreover, it becomes easy to maintain the cup shape in which the non-joining part 62 followed the shape of the collar part, and it becomes a structure where excrement is more difficult to leak.

  As shown in FIG. 3A, the upper end joint portion 632 that is a joint portion between the skin-side surface of the lower surface portion 52 and the non-skin-side surface of the top surface portion 51 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 portion 632 does not exist at the bent position of the leak-proof wall 50, the uncomfortable feeling on the wearer's skin when the diaper 1 is worn can be reduced.

=== 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.

1 ... Diapers (pants-type disposable diapers)
3 ... ventral waist part 4 ... dorsal waist part 10 ... absorbent main body 10e ... outermost end 11 ... absorbent core 11c ... constricted part 20 ... exterior body (exterior sheet)
42. Elastic member around the back leg (elastic member)
50 ... Leak preventive wall 51 ... Top surface portion 52 ... Lower surface portion 55 ... Leg elastic member 61 ... Joining portion 62 ... Non-joining portion 101 ... First locking portion 102 ... Second locking portion 421 ... Linear portion 422 ... Curved portion 551 to 556... 1st to 6th leg elastic P20... Minimum position (position where the lateral length of the exterior sheet is minimum in the longitudinal direction)

Claims (8)

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, In 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 less than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. ,
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. The end is located,
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 <br / > 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 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 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, In 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 less than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. ,
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 4 ,
A pants-type disposable diaper, wherein an extension magnification of the curved portion is larger than an extension magnification of the linear portion. 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, In 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 less than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. ,
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 6 ,
A pants-type disposable diaper characterized in that, in the lateral direction, the leg-holes elastic member disposed outside the joint is colored. 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, In 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 less than the amount of protrusion of the leakage prevention wall from the outermost end to the outside. ,
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.

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