Underpants-type absorbent article

Abstract

An underpants-type absorbent article (1) is provided with an absorbent main body (10) provided with a pair of leakage prevention wall sections (40), a belly-side waist section (20), and a back-side waist section (30), the absorbent body (10) has, in order from the front side in the front-rear direction, a first convex portion (61) in the left-right direction in which the absorbent body (10) protrudes downward, a concave portion (60) in the left-right direction in which the absorbent body (10) protrudes upward, and a second convex portion (62) in the left-right direction in which the absorbent body (10) protrudes downward.

Description

[0001] This patent application is a divisional application of an application for patent for which application number is 201880083736.6 (international application number is PCT / JP2018 / 045158), application date is December 7, 2018, and the invention name is "panty-type absorbent article". TECHNICAL FIELD

[0002] The present invention relates to a panty-type absorbent article. BACKGROUND

[0003] As a panty-type absorbent article, a panty-type disposable diaper is known. In patent document 1, a panty-type disposable diaper is disclosed, which is provided with an outer sheet member formed in a substantially hourglass shape in plan view and an absorbent main body joined to the skin surface side of the outer sheet member, and the outer sheet member is folded in half at the crotch lower portion, the left and right edge portions of the front abdominal portion and the left and right edge portions of the back portion are joined, and a waist opening portion and a leg opening portion are formed.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT DOCUMENTS

[0006] Patent document 1: Japanese Patent Application Publication No. 2010-94334 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] As disclosed in patent document 1, a general panty-type disposable diaper has only a peak fold line that folds the substantially center of the length direction of the absorbent main body in half. Thus, it becomes an appearance in which the crotch lower portion of the diaper is long and hangs down, and it is easy for the user to have an impression that the crotch lower portion is large and the fit is not good.

[0009] The present invention is made in view of the above-described conventional problems, and aims to provide a panty-type absorbent article that can give a user an impression that the fit is good from the appearance.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] The main invention for achieving the above object is a pant-type absorbent article having a front side, a back side, a left side, a right side, an upper side, and a lower side, the pant-type absorbent article having: an absorbent main body having an absorbent core and a pair of containment wall portions arranged along the upper side and the lower side; a front waist portion joined to an upper end portion of the absorbent main body on the front side; and a back waist portion joined to an upper end portion of the absorbent main body on the back side, characterized in that the pant-type absorbent article has, in order from the front side, a first protrusion portion in which the absorbent main body protrudes downward along the left side and the right side, a recess portion in which the absorbent main body protrudes upward along the left side and the right side, and a second protrusion portion in which the absorbent main body protrudes downward along the left side and the right side.

[0012] Other features of the present application will become apparent from the following description, associated drawings and appended claims.

[0013] Effects of the Invention

[0014] According to the present application, it is possible to provide a pant-type absorbent article that gives a user an impression that the pant-type absorbent article is good in fit from appearance. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of a pant-type disposable diaper 1.

[0016] Figure 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state.

[0017] Figure 3 is a schematic cross-sectional view at the II line of Figure 2

[0018] Figure 4 is a schematic cross-sectional view of the diaper 1 in a pant-type state taken in the front-rear direction.

[0019] Figure 5 is a view for explaining the containment wall portion 40.

[0020] Figure 6 is a view for explaining the containment wall portion 40.

[0021] Figure 7A is a schematic cross-sectional view at the I-I line of Figure 5 Figure 7B is a schematic cross-sectional view at the II-II line of Figure 5 Figure 7C is a schematic cross-sectional view at the III-III line of Figure 5

[0022] ​​​​Figure 8A and Figure 8B is a schematic cross-sectional view of the leakage preventing wall portion 40 in a worn state.

[0023] Figure 9 is an explanatory view of the joint regions 61, 62 of the abdominal side waistline portion 20 and the back side waistline portion 30 with the absorbent main body 10. DETAILED DESCRIPTION

[0024] At least the following matters will be apparent from the description and the drawings of the present specification.

[0025] A pant-type absorbent article having a vertical direction, a lateral direction, and a front-rear direction intersecting with each other, the pant-type absorbent article having: an absorbent main body provided with an absorbent core and a pair of leakage preventing wall portions arranged along the vertical direction; an abdominal side waistline portion joined to an upper end portion of the absorbent main body on a front side in the front-rear direction; and a back side waistline portion joined to an upper end portion of the absorbent main body on a rear side in the front-rear direction, characterized in that the pant-type absorbent article has, in order from the front side in the front-rear direction, a first protruding portion along the lateral direction in which the absorbent main body protrudes downward, a concave portion along the lateral direction in which the absorbent main body protrudes upward, and a second protruding portion along the lateral direction in which the absorbent main body protrudes downward.

[0026] According to such a pant-type absorbent article, by pulling up a part of the absorbent main body by the concave portion, the crotch lower portion does not sag downward, and thus the user can have an impression from the appearance that the fit is good. In addition, by the first protruding portion and the second protruding portion, it is possible to recognize that the pant-type absorbent article has two spaces in the front-rear direction. Thus, the space on the front side can accommodate urination and the male genital organ, and the space on the rear side can accommodate defecation and the buttocks, and it is possible for the user to have an impression that the excretion is difficult to leak and the fit is good.

[0027] The pant-type absorbent article is characterized in that the first protruding portion and the second protruding portion each have a peak fold line in which the absorbent main body is folded along the lateral direction in such a manner that the absorbent main body protrudes downward, and the concave portion has a valley fold line in which the absorbent main body is folded along the lateral direction in such a manner that the absorbent main body protrudes upward.

[0028] According to such a pant-type absorbent article, the first protruding portion, the concave portion, and the second protruding portion are easily recognized by the user. Thus, from the appearance of the pant-type absorbent article, it is possible for the user to have an impression that the excretion is difficult to leak and the fit is good.

[0029] The panty-type absorbent article is characterized in that the lower end of the first protrusion is offset from the lower end of the second protrusion in the up-and-down direction.

[0030] According to the panty-type absorbent article, the user can determine the front and back based on the positional relationship between the first protrusion and the second protrusion.

[0031] The panty-type absorbent article is characterized in that the lower end of the second protrusion is positioned lower than the lower end of the first protrusion, and the back waist portion has an extension portion that extends downward relative to the front waist portion.

[0032] According to the panty-type absorbent article, the user can accurately determine the front and back based on the sense.

[0033] The panty-type absorbent article is characterized in that, in the packed state, the both end portions of the front waist portion and the back waist portion in the left-and-right direction are folded inward in the left-and-right direction by a fold line along the up-and-down direction, and the fold line is positioned outward relative to the both side ends of the absorbent main body in the left-and-right direction.

[0034] According to the panty-type absorbent article, the portion where the absorbent core is overlapped in the front-and-back direction by the first protrusion, the recess, and the second protrusion can be further prevented from being folded inward in the left-and-right direction. Thus, the thickness of the folded panty-type absorbent article can be suppressed.

[0035] The panty-type absorbent article is characterized in that, in the packed state, the upper end portions of the front waist portion and the back waist portion are folded downward by a fold line along the left-and-right direction, and the length in the up-and-down direction from the upper end of the front waist portion and the back waist portion to the fold line is smaller than the length in the up-and-down direction from the fold line to the upper end of the recess.

[0036] According to the panty-type absorbent article, the upper end portions of the front waist portion and the back waist portion can be further prevented from being overlapped at the portion where the absorbent core is overlapped in the front-and-back direction by the first protrusion, the recess, and the second protrusion. Thus, the thickness of the folded panty-type absorbent article can be suppressed.

[0037] The panty-type absorbent article is characterized in that the above-mentioned absorbent main body has a skin side sheet disposed at a position on the wearer's skin side than the above-mentioned absorbent core, and an elastic member which is stretched and contracted in the above-mentioned up-and-down direction at both side portions in the above-mentioned left-and-right direction, the above-mentioned pair of leakage preventing wall portions being able to be erected toward the above-mentioned skin side by the above-mentioned elastic member, the above-mentioned absorbent main body having a front side end portion fixing portion which fixes the above-mentioned leakage preventing wall portions so as not to be erected at the upper end portion of the above-mentioned absorbent main body on the above-mentioned front side, a back side end portion fixing portion which fixes the above-mentioned leakage preventing wall portions so as not to be erected at the upper end portion of the above-mentioned absorbent main body on the above-mentioned back side, and an intermittent fixing portion which fixes the above-mentioned leakage preventing wall portions to the above-mentioned skin side sheet at a position spaced apart from the above-mentioned front side end portion fixing portion and the above-mentioned back side end portion fixing portion in the above-mentioned up-and-down direction.

[0038] According to such a panty-type absorbent article, the first protruding portion, the recessed portion, and the second protruding portion are formed.

[0039] The panty-type absorbent article is characterized in that the above-mentioned recessed portion has a valley fold line in which the above-mentioned absorbent main body is folded in the above-mentioned left-and-right direction in a manner in which the above-mentioned absorbent main body protrudes upward, and the portion of the above-mentioned valley fold line at which the above-mentioned absorbent core is folded is juxtaposed with the above-mentioned intermittent fixing portion in the above-mentioned left-and-right direction.

[0040] According to such a panty-type absorbent article, a portion of the absorbent main body is pulled up by the recessed portion (valley fold line), and the lower crotch portion does not sag, so that the user can have the impression from the appearance that the fit is good.

[0041] The panty-type absorbent article is characterized in that, in a state in which the above-mentioned panty-type absorbent article is spread and elongated in the above-mentioned up-and-down direction, if the length of the portion of the above-mentioned absorbent main body in the above-mentioned up-and-down direction between the region at which the above-mentioned abdominal side waist portion is joined to the above-mentioned absorbent main body and the region at which the above-mentioned back side waist portion is joined to the above-mentioned absorbent main body is set as a first length, and the length of the above-mentioned intermittent fixing portion in the above-mentioned up-and-down direction is set as a second length, the above-mentioned second length is a length which is less than 1 / 2 of the above-mentioned first length, and the above-mentioned intermittent fixing portion is disposed at a position spaced apart from the above-mentioned joined regions in the above-mentioned up-and-down direction.

[0042] According to such a panty-type absorbent article, the portion of the absorbent main body which is high in degree of freedom of deformation and in which the peak fold is performed can be provided in front of and behind the recessed portion, and the first protruding portion and the second protruding portion are formed.

[0043] The pant-type absorbent article is characterized in that, in a state where the pant-type absorbent article is spread and elongated in the aforementioned up-and-down direction, the length in the aforementioned up-and-down direction of the leakage-preventing wall portion between the aforementioned front-side end portion fixing portion and the aforementioned intermittent fixing portion is different from the length in the aforementioned up-and-down direction of the leakage-preventing wall portion between the aforementioned intermittent fixing portion and the aforementioned back-side end portion fixing portion.

[0044] According to such a pant-type absorbent article, the lower end of the first protruding portion and the lower end of the second protruding portion are offset in the up-and-down direction.

[0045] The pant-type absorbent article is characterized in that the leakage-preventing wall portion has a base end region from an inner side end of the intermittent fixing portion in the left-and-right direction to a base end side of the leakage-preventing wall portion and a tip end region on a tip end side of the leakage-preventing wall portion than the base end region, the tip end region has joining portions at positions on an inner side in the left-and-right direction than a tip end of the leakage-preventing wall portion, at which mutually facing surfaces of the joining portions are joined to each other, at least one of a position on the abdominal-side waistline portion side than the intermittent fixing portion and a position on the back-side waistline portion side than the intermittent fixing portion is provided with the joining portions in a state where the pant-type absorbent article is spread and elongated in the aforementioned up-and-down direction.

[0046] According to such a pant-type absorbent article, the two spaces formed by the first protruding portion and the second protruding portion are easily expanded in the front-and-back direction by the joining portions having high rigidity. Thus, a user can more easily recognize that the pant-type absorbent article has two spaces in the front-and-back direction.

[0047] == Embodiment ==

[0048] Hereinafter, as the pant-type absorbent article to which the present application is applied, an adult-use pant-type disposable diaper will be described as an example of an embodiment. However, the pant-type absorbent article to which the present application is applied can also be used as a pant-type disposable diaper for infants, a pant-type sanitary napkin, and the like.

[0049] == Configuration of Pant-Type Disposable Diaper 1 ==

[0050] Figure 1 is a front view of a pant-type disposable diaper 1 (hereinafter referred to as "diaper"). Figure 2 is a schematic plan view of the diaper 1 in a spread and elongated state. Figure 3 is a schematic cross-sectional view at II line of Figure 2 Figure 4 is a schematic cross-sectional view of the diaper 1 in a pant-type state, taken in the front-and-back direction.

[0051] The diaper 1 is configured to be worn in a state where the front side of the diaper 1 is positioned on the front side of the wearer and the back side of the diaper 1 is positioned on the back side of the wearer. Figure 1 ​The briefs-type state has the up-and-down direction, the left-and-right direction, and the front-and-back direction intersecting with each other, and is formed with a waist opening portion BH and a pair of leg opening portions LH. The upper side of the up-and-down direction corresponds to the side of the waist opening portion BH, and the lower side corresponds to the crotch lower side. In addition, the front side of the front-and-back direction corresponds to the wearer's abdominal side, and the back side corresponds to the wearer's back side. In addition, as shown in Figure 3 The direction in which the material constituting the diaper 1 is stacked is referred to as the thickness direction. In the thickness direction, the side that contacts the wearer is referred to as the skin side, and the opposite side is referred to as the non-skin side.

[0052] The diaper 1 has an absorbent main body 10, an abdominal side waist portion 20, and a back side waist portion 30. In the briefs-type state of the diaper 1, the absorbent main body 10 (an absorbent core 11 described later) is arranged along the up-and-down direction, and is bent at the lower end portion in the up-and-down direction. In addition, the upper end portion of the absorbent main body 10 on the front side in the front-and-back direction is joined with the abdominal side waist portion 20 from the non-skin side, and the upper end portion of the absorbent main body 10 on the back side in the front-and-back direction is joined with the back side waist portion 30 from the non-skin side.

[0053] In the unfolded state of the diaper 1, Figure 2 In the unfolded state of the diaper 1, the abdominal side waist portion 20 and the back side waist portion 30 are arranged so that the lengthwise direction thereof is along the left-and-right direction of the diaper 1. In addition, the central portion of the abdominal side waist portion 20 in the left-and-right direction is arranged with the end portion of one side of the lengthwise direction of the absorbent main body 10, and the central portion of the back side waist portion 30 in the left-and-right direction is arranged with the end portion of the other side of the lengthwise direction of the absorbent main body 10. From Figure 2 From the unfolded state of the diaper 1, the absorbent main body 10 is folded in the lengthwise direction at approximately the center, and the both side portions of the abdominal side waist portion 20 in the left-and-right direction and the both side portions of the back side waist portion 30 in the left-and-right direction are joined by melting or the like, thereby forming the briefs-type state of the diaper 1.

[0054] The absorbent main body 10 has a side elastic member 41 (an elastic member of the present application) that stretches and contracts in the lengthwise direction thereof (the up-and-down direction of the diaper 1) at both side portions in the left-and-right direction. In addition, the absorbent main body 10 has a pair of leakage preventing wall portions 40 along the lengthwise direction thereof at both side portions in the left-and-right direction. The leakage preventing wall portions 40 can be erected toward the skin side by the side elastic member 41 (details are described later).

[0055] Further, the absorbent main body 10 has: an absorbent core 11 that absorbs excreted liquid; a skin-side sheet 12 that is liquid-permeable and is disposed on the skin side of the wearer in comparison with the absorbent core 11; a non-skin-side sheet 13 that is liquid-impermeable and is disposed on the non-skin side in comparison with the absorbent core 11; and a sheet member 14. The skin-side sheet 12 folds back the left and right side portions in the lateral direction toward the non-skin side in a manner of wrapping the absorbent core 11. The sheet member 14 is disposed on the non-skin side in comparison with the non-skin-side sheet 13, and forms a leakage-preventing wall portion 40 at a position on the skin side in comparison with the skin-side sheet 12.

[0056] The absorbent core 11 is obtained by forming a liquid-absorbing fiber such as a pulp fiber containing a high-absorbing polymer (so-called SAP) into a prescribed shape. The absorbent core 11 of the present embodiment is a substantially hourglass shape in plan view, but is not limited thereto, and may, for example, be a rectangular shape or the like in plan view. Further, the absorbent core 11 can be covered by a liquid-permeable core wrap sheet 15.

[0057] The front waistline portion 20 and the back waistline portion 30 each have: an inner sheet 21, 31; an outer sheet 22, 32 that is disposed on the non-skin side in comparison with the inner sheet 21, 31; a waistline elastic member 23, 33; and a cover sheet 24, 34. The waistline elastic member 23, 33 is disposed in parallel in the up-down direction between the inner sheet 21, 31 and the outer sheet 22, 32, and is fixed in an elongated state in the lateral direction. Thus, the front waistline portion 20 and the back waistline portion 30 fit to the waistline of the wearer. Further, the cover sheet 24, 34 covers the upper end portion of the absorbent main body 10 from the skin side.

[0058] In the unfolded and elongated state of the Figure 2 The front waistline portion 20 is a rectangular shape in plan view. The back waistline portion 30 has: an overlapping portion 30A that overlaps the front waistline portion 20 in the front-rear direction; and an extension portion 30B that extends to the lower side in comparison with the front waistline portion 20. The overlapping portion 30A is a rectangular shape in plan view, and the extension portion 30B is an inverted trapezoidal shape in plan view. The wearer's buttocks can be covered by the extension portion 30B. On the other hand, the front waistline portion 20 is shorter in the up-down direction than the back waistline portion 30, and does not extend to the crotch lower side. Thus, the action of the leg that is lifted up to the front side at the time of walking or the like is not hindered, and walking is easy.

[0059] Further, in the extension portion 30B of the back waist portion 30, an extension elastic member 35 is provided along the lower end thereof. Specifically, the extension elastic member 35 has a pair of inclined portions 351 which are inclined to the inner side in the left-right direction toward the lower side, and a straight portion 352 which is provided in the left-right direction between the pair of inclined portions 351. The extension elastic member 35 is fixed in an elongated state between the inner sheet 31 and the outer sheet 32, similarly to the waist elastic member 33. By the extension elastic member 35, the extension portion 30B is fitted to the buttocks of the wearer, and the rolling up of the extension portion 30B is suppressed.

[0060] However, the configuration is not limited to the above. For example, the front waist portion 20 can have the same planar shape as the back waist portion 30, and can have the same elastic member as the extension elastic member 35 of the back waist portion 30. That is, the front waist portion 20 can have an inclined elastic member which is inclined to the inner side in the left-right direction toward the lower side at the lower end portion. Further, the back waist portion 30 can have the same rectangular shape in plan view as the front waist portion 20, and can not have the extension elastic member 35.

[0061] ==About the leakage preventing wall portion 40==

[0062] Figure 5 and Figure 6 is a view which illustrates the leakage preventing wall portion 40. Figure 5 is a schematic plan view of the diaper 1 in an unfolded and elongated state. Figure 6 is a schematic cross-sectional view of the leakage preventing wall portion 40. Figure 7A is Figure 5 is a schematic cross-sectional view at the I-I line of Figure 7B is Figure 5 is a schematic cross-sectional view at the II-II line of Figure 7C is Figure 5 is a schematic cross-sectional view at the III-III line of Figure 8A and Figure 8B is a schematic cross-sectional view of the leakage preventing wall portion 40 in a worn state.

[0063] In the following description, the state in which the diaper 1 is unfolded and elongated in the up-down direction means a state in which the front waist portion 20 and the back waist portion 30 are disengaged, the diaper 1 is unfolded in the length direction (up-down direction) of the absorbent main body 10, and the diaper 1 is elongated in the length direction (up-down direction) of the absorbent main body 10 without wrinkles. Specifically, it is a state in which the dimensions of the materials (for example, the sheet member 14 and the like) which constitute the diaper 1 are elongated to a length which is consistent with or close to the dimensions of the individual members thereof.

[0064] <<Configuration of the leakage preventing wall portion 40>>

[0065] The pair of leakage preventing wall portions 40 provided in the absorbent main body 10 are each formed by folding the sheet member 14 constituting the outer member of the absorbent main body 10. As an example of the method of forming the leakage preventing wall portion 40, the following method can be exemplified.

[0066] First, in a state where the sheet member 14 has the non-skin side sheet 13 placed thereon, the left and right side portions of the sheet member 14 are folded toward the skin side and the inner side in the left and right direction with the bending line fl (refer to FIG. 2) as a base point. Between the sheet members 14 thus made into two layers, the side elastic members 41 are fixed in an elongated state in the longitudinal direction of the absorbent main body 10. Next, the left and right side portions of the sheet members 14 thus made into two layers are folded toward the non-skin side and the inner side in the left and right direction with the bending line f2 as a base point. Figure 6 Finally, in a state where the non-skin side sheet 13 has the absorbent core 11 and the skin side sheet 12 placed thereon, the left and right side portions of the sheet members 14 thus made into four layers are folded toward the skin side and the inner side in the left and right direction with the bending line f3 as a base point. Thus, the portions of the sheet members 14 where the side elastic members 41 are fixed are disposed on the skin side as compared with the skin side sheet 12. Also, the leakage preventing wall portions 40 are formed which are folded into a substantially S-shaped cross section.

[0067] The leakage preventing wall portion 40 has a "skin side portion 42" which is a portion between the bending lines fl and f2, and a "non-skin side portion 43" which is a portion between the bending lines f2 and f3 and is disposed on the non-skin side as compared with the skin side portion 42. The skin side portion 42 is a portion which is folded toward the outer side in the left and right direction with respect to the non-skin side portion 43. Thus, the outer end 42a in the left and right direction of the skin side portion 42 becomes the "tip end 42a of the leakage preventing wall portion 40".

[0068] In addition, the portions of the sheet member 14 where the absorbent core 11 is located on the non-skin side are fixed to the back sheet 13 or the like by the adhesive 16 (refer to FIG. 1) up to the position of the side end 10a in the left and right direction of the absorbent main body 10. Thus, the position of the bending line f3 which is the side end 10a of the absorbent main body 10 becomes the base end 43a of the leakage preventing wall portion 40. That is, the outer end 43a in the left and right direction of the non-skin side portion 43 becomes the "base end 43a of the leakage preventing wall portion 40".

[0069] Figure 6 Between the two sheet members 14 constituting the skin side portion 42, four side elastic members 41A are provided in parallel in the left and right direction. The four side elastic members 41A are disposed so as to be biased toward the tip end 42a of the leakage preventing wall portion 40. Between the two sheet members 14 constituting the non-skin side portion 52, two side elastic members 41B are provided in parallel in the left and right direction. The two side elastic members 41B are disposed so as to be biased toward the inner end 43b in the left and right direction of the non-skin side portion 43.

[0070] In addition, the portions of the sheet member 14 where the absorbent core 11 is located on the non-skin side are fixed to the back sheet 13 or the like by the adhesive 16 (refer to FIG. 1) up to the position of the side end 10a in the left and right direction of the absorbent main body 10. Thus, the position of the bending line f3 which is the side end 10a of the absorbent main body 10 becomes the base end 43a of the leakage preventing wall portion 40. That is, the outer end 43a in the left and right direction of the non-skin side portion 43 becomes the "base end 43a of the leakage preventing wall portion 40". ​

[0071] Further, the absorbent main body 10 has, as shown in Figure 5 the front side end portion fixing portion 51 that fixes the leakage preventing wall portion 40 so as not to be erected at the upper end portion on the front side in the front-rear direction of the diaper 1, and the rear side end portion fixing portion 52 that fixes the leakage preventing wall portion 40 so as not to be erected at the upper end portion on the rear side.

[0072] Specifically, as shown in Figure 7A the front side end portion fixing portion 51 has the skin side fixing portion 511 that fixes the skin side portion 42 and the non-skin side portion 43 of the leakage preventing wall portion 40 with an adhesive or the like, and the non-skin side fixing portion 512 that fixes the non-skin side portion 43 and the skin side sheet 12 of the leakage preventing wall portion 40 with an adhesive or the like. Although not shown, the rear side end portion fixing portion 52 also has the same cross section as Figure 7A the skin side fixing portion and the non-skin side fixing portion.

[0073] Thus, in the length direction of the absorbent main body 10, the portion of the sheet member 14 between the front side end portion fixing portion 51 and the rear side end portion fixing portion 52 becomes a portion where the leakage preventing wall portion 40 can be erected. Further, for example, in the case where the wearer is in a sleeping posture, even if the excreted liquid flows to the front-rear direction while being blocked by the leakage preventing wall portion 40, the excreted liquid can be blocked by the front side end portion fixing portion 51 and the rear side end portion fixing portion 52, and front and rear leakage can be suppressed.

[0074] Incidentally, the width (length in the left-right direction) of the portion where the leakage preventing wall portion 40 of the present embodiment can be erected is not a small amount. Specifically, the width of the skin side portion 42 and the width of the non-skin side portion 43 are not small amounts, and are greater than 5 mm. Thus, if the both end portions in the length direction of the leakage preventing wall portion 40 are not fixed so as not to be erected, the portion where the leakage preventing wall portion 40 can be erected would contract toward the center in the length direction, and the leakage preventing wall portion 40 would not be able to be erected. That is, by providing the front side end portion fixing portion 51 and the rear side end portion fixing portion 52, the leakage preventing wall portion 40 can be well erected over a large range in the length direction of the absorbent main body 10, and the leakage preventing wall portion 40 can be caused to function.

[0075] Further, the absorbent main body 10 has, at positions spaced apart from the front side end portion fixing portion 51 and the rear side end portion fixing portion 52 in the up-down direction, an intermittent fixing portion 53 that fixes the leakage preventing wall portion 40 to the skin side sheet 12. That is, in a state where the diaper 1 is spread and elongated in the up-down direction Figure 5 , the front side end portion fixing portion 51, the intermittent fixing portion 53, and the rear side end portion fixing portion 52 are intermittently arranged in the up-down direction (the length direction of the absorbent main body 10).

[0076] Specifically, as shown in Figure 6As illustrated, the intermittent fixing portion 53 fixes the non-skin side portion 43 of the leakage preventing wall portion 40 and the skin side sheet 12 with an adhesive or the like. Figure 5 The illustrated intermittent fixing portion 53 is configured by juxtaposing two fixing portions 531, 532 in the left-right direction in a rectangular shape in plan view. However, the present application is not limited thereto, and for example, the intermittent fixing portion 53 can be configured by one fixing portion or by a plurality of fixing portions juxtaposed in the left-right direction or the up-down direction.

[0077] The intermittent fixing portion 53 is high in rigidity due to the application of an adhesive or the like. Thus, it is preferable that the intermittent fixing portion 53 be disposed inward of the side end 10a of the absorbent main body 10 in the left-right direction. By not locating the intermittent fixing portion 53, which is high in rigidity, at the side end 10a of the absorbent main body 10, irritation of the wearer's inner leg by the side end 10a (edge) of the absorbent main body 10 can be prevented.

[0078] In addition, as illustrated in FIG. 1, the intermittent fixing portion 53 is formed in the leakage preventing wall portion 40. Figure 6 As illustrated, in the leakage preventing wall portion 40, a region from the position of the inner end 53a of the intermittent fixing portion 53 in the left-right direction to the base end 43a side of the leakage preventing wall portion 40 (a region up to the base end 43a) is referred to as a "base end region 401". In addition, a region from the base end region 401 to the tip end 42a side of the leakage preventing wall portion 40 (a region up to the tip end 42a) is referred to as a "tip end region 402".

[0079] The tip end region 402 of the leakage preventing wall portion 40 is, as illustrated, provided with a "clamping joint portion 54" (a joint portion of the present application) in which at least a portion of mutually facing surfaces of each other are joined at a position inward of the tip end 42a of the leakage preventing wall portion 40 in the left-right direction. Figure 7C As illustrated, the clamping joint portion 54 is provided along the length direction of the absorbent main body 10. Figure 5

[0080] The clamping joint portion 54 of the present embodiment is formed along the inner end 43b in the left-right direction of the non-skin side portion 43 (i.e., the folding line f2). However, the present application is not limited thereto, and the clamping joint portion 54 can be formed at a position outward of the inner end 43b in the left-right direction from the inner end 43b in the left-right direction of the non-skin side portion 43.

[0081] The above-described front end portion fixing portion 51, the rear end portion fixing portion 52, the intermittent fixing portion 53, and the clamping joint portion 54 are formed by applying an adhesive, but the present application is not limited thereto. For example, they can be formed by a press bonding method such as embossing.

[0082] ​Especially in the intermittent fixing part 53, there is a risk that a portion of the adhesive forming the intermittent fixing part 53 may peel off due to the wearer's body movements. Furthermore, in the intermittent fixing part 53, the leak-proof wall portion 40, which is folded back in the left and right directions, is fixed to the skin side panel 12. Therefore, if a portion of the adhesive forming the intermittent fixing part 53 peels off, the adhesive will be exposed to the wearer's skin, potentially causing skin irritation. Therefore, while the intermittent fixing part 53 can be formed with adhesive, it is preferable to form it using a pressing method such as embossing.

[0083] <<On Leakage Suppression of Excrement>>

[0084] In the location where the intermittent fixing part 53 is not provided, as described above... Figure 3 As shown, the length of the sheet that can stand upright, starting from the left-right side end 11a of the absorbent core 11, is as follows: Specifically, it is the sum of the left-right length W1 of the sheet (skin-side sheet 12, non-skin-side sheet 13, sheet member 14) from the side end 11a of the absorbent core 11 to the side end 10a of the absorbent body 10, the left-right length W2 of the non-skin-side portion 43 of the leak-proof wall 40, and the left-right length W3 of the skin-side portion 42 of the leak-proof wall 40 (W1 + W2 + W3). A sheet of this length (W1 + W2 + W3) is as follows: Figure 6 As shown, it is partially clamped by the intermittent fixing part 53.

[0085] In other words, compared to the area without the intermittent fixing part 53, the length of the piece that can stand upright from the side end 11a in the left-right direction of the absorbent core 11 is shorter in the area where the intermittent fixing part 53 is provided. Therefore, even if the absorbent core 11 becomes heavier due to absorbing excrement during the wearing of the diaper 1, Figure 8B As shown, the portion of the absorbent core 11 where the intermittent fixing part 53 is located is also less likely to sag. That is, the absorbent body 10 maintains a close fit to the wearer even after excretion. Therefore, even when excretion has occurred, the absorbent core 11, which fits snugly against the wearer, can absorb the excrement, thus suppressing leakage. Furthermore, the sag of the absorbent core 11 makes walking and other activities easier after excretion, preventing discomfort for the wearer. Additionally, it is difficult to visually identify whether the diaper 1 is being worn.

[0086] Furthermore, the intermittent fixing portion 53 can suppress the sagging of the absorbent core 11, and on the other hand, at the location of the intermittent fixing portion 53, the length of the portion of the leak-proof wall portion 40 that can stand upright is shortened. This is because a portion of the sheet member 14 of the leak-proof wall portion 40 that can stand upright is fixed to the skin side sheet 12. Therefore, the intermittent fixing portion 53 can be provided not over a large area in the length direction of the absorbent body 10, but only in a portion of the length direction of the absorbent body 10.

[0087] In this way, compared with the length of the part of the leak-proof wall 40 in the intermittent fixing part 53 that can stand up, the length of the part of the leak-proof wall 40 that can stand up between the front end fixing part 51 and the intermittent fixing part 53 and between the intermittent fixing part 53 and the rear end fixing part 52 can be increased.

[0088] Therefore, in areas where the intermittent fixing part 53 is not provided (e.g., Figure 8A ), and the part provided with intermittent fixing part 53 (e.g. Figure 8B Compared to the previous version, a space 2 of appropriate size can be ensured between the wearer's body and the absorbent body 10. Excrement can be contained in this space 2, and leakage of excrement can be suppressed. In addition, the male genitalia can be contained in the space 2 on the ventral side of the intermittent fixing part 53, and the buttocks and defecation can be contained in the space 2 on the back side of the intermittent fixing part 53.

[0089] Additionally, in the state where diaper 1 is unfolded and stretched in the vertical direction ( Figure 5 In this configuration, the center CL2 of the intermittent fixing part 53 in the vertical direction can be positioned closer to the abdominal waist portion 20 than the center CL1 of the diaper 1 in the vertical direction. That is, the intermittent fixing part 53 can be positioned biased towards the abdominal waist portion 20.

[0090] This increases the vertical length (L6) of the leak-proof wall portion 40 between the intermittent fixing portion 53 and the rear end fixing portion 52. Therefore, it ensures sufficient space for the wearer's buttocks and defecation, and also suppresses rear leakage.

[0091] Furthermore, the wearer's urination position is forward (abdominal) compared to the groin area. Therefore, as described above, the intermittent fixing part 53 can be positioned towards the abdominal waist area 20. In this way, the intermittent fixing part 53 is positioned corresponding to the contact position with the excretion port in the absorbent core 11. Therefore, the intermittent fixing part 53 can suppress sagging of the part of the absorbent core 11 that becomes heaviest due to absorbing excrement.

[0092] However, it is not limited to the above configuration. For example, in the state where the diaper 1 is unfolded and stretched in the vertical direction ( Figure 5 In this case, the center CL2 of the intermittent fixing part 53 in the vertical direction can be aligned with the product center CL1 of the diaper 1, or it can be positioned on the back side waist part 30 side relative to the product center CL1 of the diaper 1.

[0093] Additionally, the end region 402 of the leak-proof wall section 40, as Figure 7C As shown, it has a clamping joint 54. The clamping joint 54 maintains the folded shape of the leak-proof wall portion 40, that is, maintains the bend at the bending line f2. Therefore, in the wearing state of the diaper 1 ( Figure 8AUnder the condition that the non-skin side 43 is raised towards the wearer by the side elastic member 41B disposed on the non-skin side 43 of the leak-proof wall 40, and the skin side 42 is brought into contact with the wearer's face by the side elastic member 41A disposed on the skin side 42.

[0094] Furthermore, the clamping joint 54 has high rigidity, maintaining its surface shape, particularly within the skin-side portion 42, allowing it to firmly adhere to the wearer. On the other hand, the areas of the skin-side portion 42 other than the clamping joint 54 have low rigidity, forming a curved surface that conforms to the wearer's body contours, while still adhering closely to the wearer. Therefore, the tightness of the leak-proof wall portion 40 relative to the wearer is improved, suppressing leakage of excrement.

[0095] Furthermore, the absorbent body 10 of this embodiment has side elastic members 41 that extend and retract in the vertical direction on both sides in the left-right direction, but these side elastic members 41 are only disposed in the end region 402 of the leak-proof wall portion 40. Therefore, the rigidity of the intermittent fixing portion 53 does not hinder part of the contraction force of the side elastic members 41, and the contraction force of the side elastic members 41 can be effectively utilized to reliably erect the leak-proof wall portion 40.

[0096] However, the configuration is not limited to the above. The side elastic member 41 may also be provided in the base region 401. In detail, the side elastic member 41 may be provided in the base region 401 at a position that does not overlap with the intermittent fixing part 53 in the left-right direction or at a position that overlaps with the intermittent fixing part 53.

[0097] ===Regarding the appearance of Diaper 1===

[0098] In this embodiment, the diaper 1, in its natural, underwear-like state, such as Figure 1 , Figure 4 As shown, starting from the front side in the front-rear direction, it has: a first protrusion 61 protruding downwards along the left-right direction of the absorbent body 10, a concave portion 60 protruding upwards along the left-right direction of the absorbent body 10, and a second protrusion 62 protruding downwards along the left-right direction of the absorbent body 10.

[0099] This is because the absorbent body 10 has an intermittent fixing part 53.

[0100] Specifically, at the location of the intermittent fixing part 53, the contraction of the side elastic member 41, together with the leak-proof wall part 40, also lifts the main body of the absorbent body 10 (skin side sheet 12, absorbent core 11, etc.) fixed to the leak-proof wall part 40, forming a recess 60. In other words, at the location of the intermittent fixing part 53, the length of the sheet member 14 that can stand upright in the leak-proof wall part 40 is short, and the absorbent body 10 does not sag, thus forming a recess 60.

[0101] Further, the intermittent fixing portion 53 is provided at a part in the longitudinal direction of the absorbent main body 10. Thus, the parts of the absorbent main body 10 before and after the intermittent fixing portion 53 sag due to their own weight, forming the first protruding portion 61 and the second protruding portion 62.

[0102] Thus, in the diaper 1 of the present embodiment, a part of the absorbent main body 10 is pulled up by the recessed portion 60, and does not sag downward toward the crotch lower side. Thus, the crotch lower part of the diaper 1 does not become bulky, and the user can have the impression from the appearance of the diaper 1 that the fit is good.

[0103] Further, by the first protruding portion 61 and the second protruding portion 62, it is possible to recognize that the diaper 1 has two spaces before and after the recessed portion 60. Thus, it is possible for the user to have the impression that it is possible to accommodate urination and the male genital organ in the space of the first protruding portion 61, it is possible to accommodate the buttocks and defecation in the space of the second protruding portion 62, excrement is difficult to leak, and the fit is good.

[0104] Further, it is preferable that the first protruding portion 61 and the second protruding portion 62 each have a peak fold line La, Lb that folds the absorbent main body in the left-right direction in a manner in which the absorbent main body 10 protrudes toward the lower side, and the recessed portion 60 has a valley fold line Lc that folds the absorbent main body 10 in the left-right direction in a manner in which the absorbent main body 10 protrudes toward the upper side. In this way, it is easy for the user to recognize the first protruding portion 61, the recessed portion 60, and the second protruding portion 62 from the appearance of the diaper 1.

[0105] However, it is not limited to the above-described configuration, and it is also possible to not form the peak fold lines La, Lb or the valley fold line Lc at the respective tips of the first protruding portion 61, the recessed portion 60, and the second protruding portion 62. That is, it is also possible for the absorbent main body 10 to not be firmly folded in the front-rear direction to the extent that the peak fold lines La, Lb or the valley fold line Lc are formed on the absorbent main body 10.

[0106] Further, since the valley fold line Lc (recessed portion 60) is formed by the intermittent fixing portion 53, in the diaper 1 in the briefs type state, the part at which the absorbent core 11 is folded at the valley fold line Lc is juxtaposed with the intermittent fixing portion 53 in the left-right direction. In other words, in a state in which the diaper 1 is spread and elongated in the up-down direction Figure 5 ), the part at which the absorbent core 11 is folded at the valley fold line Lc and the intermittent fixing portion 53 overlap in the up-down direction (the longitudinal direction of the absorbent main body 10).

[0107] Further, in the Figure 5 , the valley fold line Lb is formed so as to cross the intermittent fixing portion 53, but it is not limited thereto. The intermittent fixing portion 53 is high in rigidity. Thus, for example, it is also possible for the valley fold line Lc to branch from the part at which the absorbent core 11 is folded toward the outside in the left-right direction, and be formed along both ends in the up-down direction of the intermittent fixing portion 53.

[0108] In addition, the diaper 1 of the present embodiment is a so-called three-member type diaper in which the front waistline portion 20 and the back waistline portion 30 are separated and function as separate members. However, it is not limited thereto, and can be a so-called two-member type diaper in which the front waistline portion 20 and the back waistline portion 30 are continuous and function as an integrated member, with a crotch portion provided between the front waistline portion 20 and the back waistline portion 30.

[0109] However, in the three-member type diaper 1, the central portion of the length direction of the absorbent main body 10 is less likely to be affected by the outer cover member, and has a high degree of freedom of deformation. Thus, the absorbent main body 10 is easily deformed by the contraction of the side elastic member 41, and the first protrusion 61, the concave portion 60, and the second protrusion 62 are easily formed (i.e., the pair of peak fold lines La, Lb and the valley fold line Lc are easily formed). Thus, it is preferable that the diaper 1 be of the three-member type.

[0110] Figure 9 is a schematic plan view of the diaper 1 spread and elongated in the up-down direction, and is a view that explains the joint regions 61, 62 of the front waistline portion 20 and the back waistline portion 30 to the absorbent main body 10. At the end portion of the front side in the length direction of the absorbent main body 10, the front waistline portion 20 is joined from the non-skin side by the adhesive applied to the joint region 61. In addition, at the end portion of the back side in the length direction of the absorbent main body 10, the back waistline portion 30 is joined from the non-skin side by the adhesive applied to the joint region 62.

[0111] The portion of the absorbent main body 10 from the lower end 61a of the joint region 61 of the front side to the lower end 62b of the joint region 62 of the back side, i.e., the portion of the absorbent main body 10 that is not joined to the front waistline portion 20 and the back waistline portion 30, is less likely to be affected by the outer cover member, and has a high degree of freedom of deformation. That is, the absorbent main body 10 is easily deformed by the contraction of the side elastic member 41, and the first protrusion 61, the concave portion 60, and the second protrusion 62 are easily formed (i.e., the pair of peak fold lines La, Lb and the valley fold line Lc are easily formed).

[0112] Thus, in a state in which the diaper 1 is spread and elongated in the up-down direction, Figure 9 ) the following configuration is preferable. In a case where the length in the up-down direction of the portion of the absorbent main body 10 between the joint region 61 at which the front waistline portion 20 is joined to the absorbent main body 10 and the joint region 62 at which the back waistline portion 30 is joined to the absorbent main body 10 is set to a first length LI, and the length in the up-down direction of the intermittent fixing portion 53 is set to a second length L2, the second length L2 is a length that is less than 1 / 2 of the first length LI (L2 < LI / 2). Furthermore, the intermittent fixing portion 53 is disposed at a position spaced apart in the up-down direction (in the length direction of the absorbent main body 10) from the joint regions 61, 62.

[0113] Thus, the length (approximately L2) of the portion of the absorbent body 10 pulled by the intermittent fixing portion 53 can be set to be less than 1 / 2 of the length (approximately L1) of the portion of the absorbent body 10 having a high degree of freedom of deformation. Thus, the portion of the absorbent body 10 having a high degree of freedom of deformation and capable of forming the length (length capable of peak folding) of the first protruding portion 61 and the second protruding portion 62 can be provided before and after the intermittent fixing portion 53 (the recess 60). Thus, the absorbent body 10 can be sagged before and after the intermittent fixing portion 53 to form the first protruding portion 61 and the second protruding portion 62 (i.e., to form the pair of peak fold lines La and Lb).

[0114] In addition, as described above, the leakage preventing wall portion 40 has the pinch joint portion 54 (see FIG. 1) having a high rigidity. Figure 7C In the diaper 1 in the underpants-type state, the lower end portion of the absorbent body 10 is bent toward the inside of the skin side by the contraction of the side elastic member 41, and the pinch joint portion 54 maintains a straight state in the front-rear direction against the contraction force of the side elastic member 41. Thus, the absorbent body 10 is also easily oriented in the front-rear direction at the portion where the pinch joint portion 54 is present.

[0115] Thus, in a state in which the diaper 1 is spread and elongated in the up-down direction (see FIG. 1), Figure 9 the pinch joint portion 54 can be disposed at a position on the abdominal girth portion 20 side of the intermittent fixing portion 53 and at a position on the back girth portion 30 side of the intermittent fixing portion 53. That is, the pinch joint portion 54 can be disposed in each of the two spaces formed by the first protruding portion 61 and the second protruding portion 62.

[0116] Thus, on the appearance of the diaper 1, the two spaces formed by the first protruding portion 61 and the second protruding portion 62 are easily expanded in the front-rear direction by the pinch joint portion 54. Thus, the user can easily recognize that the diaper 1 has two spaces (spaces for containing excreted matter, etc.) in the front-rear direction.

[0117] In addition, in the present embodiment, the pinch joint portion 54 is disposed on the abdominal side and the back side of the intermittent fixing portion 53, but the pinch joint portion 54 can be disposed on only one of the abdominal side and the back side of the intermittent fixing portion 53.

[0118] In addition, as shown in FIG. 1, it is preferable that the lower end 61a of the first protruding portion 61 and the lower end 62a of the second protruding portion 62 be offset in the up-down direction. Figure 1 Figure 4 That is, it is preferable that the pair of peak fold lines La and Lb be offset in the up-down direction. Thus, the user can determine the front-rear direction of the diaper 1 based on the positional relationship between the first protruding portion 61 and the second protruding portion 62. Thus, the diaper 1 can be accurately worn so that the abdominal girth portion 20 side is located on the abdominal side of the wearer and the back girth portion 30 side is located on the back side of the wearer. ​

[0119] In addition, the lower end 61a of the first protrusion 61 and the lower end 62a of the second protrusion 62 can be either the lower end on the non-skin surface side of the absorbent body 10 as shown in the drawing or the lower end on the skin surface side of the absorbent body 10. Figure 4

[0120] In addition, the user will consider making the space on the back side larger so as to accommodate the buttocks in the space formed by the second protrusion 62. Thus, it is preferable that the lower end 62a of the second protrusion 62 be located at a position lower than the lower end 61a of the first protrusion 61. That is, it is preferable that the peak fold line Lb on the back side be located at a position lower than the peak fold line La on the front side. In this way, on the appearance of the diaper 1, the space on the back side becomes larger than the space on the front side, and the user can accurately judge the front and back of the diaper 1 in terms of the sense of touch.

[0121] Further, it is preferable that the back waist portion 30 have an extension 30B extending downward compared to the front waist portion 20 as in the diaper 1 of the present embodiment. By the diaper 1 having the extension 30B that can cover the buttocks, the shape of the diaper 1 approaches the shape of a general briefs. Thus, the user can accurately judge the front and back of the diaper 1 in terms of the sense of touch.

[0122] However, it is not limited to the above-described configuration, and the lower end 61a of the first protrusion 61 (the peak fold line La on the front side) can be located at a position lower than the lower end 62a of the second protrusion 62 (the peak fold line Lb on the back side), or the lower end 61a of the first protrusion 61 (the peak fold line La on the front side) can be aligned with the lower end 62a of the second protrusion 62 (the peak fold line Lb on the back side) in the vertical direction.

[0123] In addition, in the length direction of the absorbent body 10, the portion of the leakage barrier portion 40 between the front end portion fixing portion 51 and the back end portion fixing portion 52 becomes a portion that can be erected by the contraction of the side elastic member 41. Thus, the portion of the absorbent body 10 between the front end portion fixing portion 51 and the back end portion fixing portion 52 is deformed by the contraction of the side elastic member 41, that is, is bent inward with the skin side, and the first protrusion 61, the concave portion 60, and the second protrusion 62 are formed (that is, a pair of peak fold lines La and Lb and a valley fold line Lc are formed).

[0124] Thus, in a state in which the diaper 1 is unfolded and elongated in the vertical direction, Figure 5 ) the length (L5) in the vertical direction of the leakage barrier portion 40 between the front end portion fixing portion 51 and the intermittent fixing portion 53 can be made different from the length (L6) in the vertical direction of the leakage barrier portion 40 between the intermittent fixing portion 53 and the back end portion fixing portion 52.

[0125] ​Thus, in the portion of the absorbent main body 10 deformed by the contraction of the side elastic member 41, the intermittent fixing portion 53 is disposed biased toward one of the front side and the rear side. Therefore, the lengths of the portions of the absorbent main body 10 that are peak-folded before and after the intermittent fixing portion 53 are different. Therefore, the lower end 61a (front peak fold line La) of the first convex portion 61 and the lower end 62a (rear peak fold line Lb) of the second convex portion 62 can be offset in the vertical direction.

[0126] In the diaper 1 of the present embodiment, the vertical length (L6) of the leak-proof wall portion 40 between the intermittent fixing portion 53 and the rear end fixing portion 52 is longer (L5 < L6) than the vertical length (L5) of the leak-proof wall portion 40 between the front end fixing portion 51 and the intermittent fixing portion 53. Therefore, the lower end 62a of the second convex portion 62 is located at a position lower than the lower end 61a of the first convex portion 61.

[0127] In addition, it is assumed that the diaper 1 formed into a pants type is folded in the following form in the packaged state. First, the left and right ends of the ventral waist portion 20 and the dorsal waist portion 30 are folded back inward in the left-right direction along the first fold line FL1 (refer to Figure 9 ). Then, the upper ends of the ventral waist portion 20 and the dorsal waist portion 30 are folded back downward along the second fold line FL2 in the left-right direction. The folded diapers 1 are packaged individually or in multiples and circulated.

[0128] In the diaper 1 of the present embodiment, as Figure 4 shown, in the range from the lower end 61a of the first convex portion 61 to the upper end 60a of the concave portion 60, the absorbent core 11 having a thickness is overlapped in four layers. That is, the diaper 1 of the present embodiment has a portion having a thickness in the front-rear direction compared with a general diaper that is simply folded in half.

[0129] Then, preferably, the first fold line FL1 is located outside the side ends 10a of the absorbent main body 10 in the left-right direction. In the present embodiment, the first fold line FL1 is along the side ends 10a of the absorbent main body 10 in the left-right direction.

[0130] In this case, the portion of the absorbent core 11 overlapped in four layers is not further folded back inward in the left-right direction, and the absorbent core 11 can be prevented from being folded into eight layers. Therefore, the diaper 1 is difficult to unfold, and the folded state of the diaper 1 can be maintained. Therefore, it is easy for the user to hold the diaper 1. In addition, the front-rear thickness of the folded diaper 1 can be suppressed. Therefore, it is difficult to occur a conveyance problem of the folded diaper 1 on the production line.

[0131] In addition, preferably, as Figure 4As shown, in the diaper 1 in the underpants-type state, the length L3 in the up-down direction from the upper ends 20a, 30a of the abdominal-side waist circumference portion 20 and the back-side waist circumference portion 30 to the second fold line FL2 is smaller than the length L4 in the up-down direction from the second fold line FL2 to the upper end 60a of the recessed portion 60 (L3 < L4). In the present embodiment, the second fold line FL2 is along both ends 10b in the length direction of the absorbent main body 10.

[0132] In this case, the upper end portions of the abdominal-side waist circumference portion 20 and the back-side waist circumference portion 30 folded back by the second fold line FL2 are positioned on the upper side than the upper end 60a of the recessed portion 60. In detail, the left and right end portions of the abdominal-side waist circumference portion 20 and the back-side waist circumference portion 30 are folded back toward the inside in the left and right directions by the first fold line FL1 as described above, and the portions where the abdominal-side waist circumference portion 20 and the back-side waist circumference portion 30 are overlapped by two layers each are positioned on the upper side than the upper end 60a of the recessed portion 60 after being folded back by the second fold line FL2.

[0133] That is, it is possible to prevent the portions having the thickness of the abdominal-side waist circumference portion 20 and the back-side waist circumference portion 30 from being overlapped with the portions of the absorbent core 11 overlapped by four layers by the folding back of the second fold line FL2. Thus, it is possible to suppress the thickness in the front and back directions of the folded diaper 1. Thus, it is difficult for the conveyance problem of the folded diaper 1 to occur on the production line.

[0134] In addition, the upper end 60a of the recessed portion 60 is preferably the upper end on the skin side of the absorbent main body 10 as shown, but can be the upper end on the non-skin side of the absorbent main body 10. Figure 4

[0135] ==Other Embodiments==

[0136] The embodiments of the present application have been described above, but the above-described embodiments are intended for easy understanding of the present application, and are not intended for limiting interpretation of the present application. In addition, the present application can be changed or improved within the scope of the concept thereof, and the present application certainly includes equivalent configurations thereof.

[0137] In addition, it can also be a manner in which the leakage-preventing wall portion 40 does not have the pinch-bonding portion 54. In addition, it can also be a manner in which only one of the abdominal-side pinch-bonding portion 541 and the back-side pinch-bonding portion 542 is provided. In addition, it can also be a manner in which the pinch-bonding portion 54 is continuously provided in the length direction of the absorbent main body 10.

[0138] Explanation of Reference Numerals

[0139] ​1 diaper (pant-type absorbent article); 10 absorbent main body; 11 absorbent core; 111 narrow portion; 12 body-side sheet; 13 non-body-side sheet; 14 sheet member; 15 core wrap sheet; 20 abdominal side waist portion; 21 inner sheet; 22 outer sheet; 23 waist elastic member; 24 cover sheet; 30 back side waist portion; 30A overlapping portion; 30B extension portion; 31 inner sheet; 32 outer sheet; 33 waist elastic member; 34 cover sheet; 35 extension elastic member; 40 leakage barrier portion; 401 base end region; 402 tip end region; 41 side elastic member (elastic member); 42 body-side portion; 43 non-body-side portion; 42a tip end of leakage barrier portion; 43a base end of leakage barrier portion; 51 front side end portion fixing portion; 52 back side end portion fixing portion; 53 intermittent fixing portion; 54 pinch-bonding portion (joining portion); 61, 62 joining region; La, Lb peak fold line; Lc valley fold line; FL1 1st fold line (fold line); FL2 2nd fold line (fold line); 60 recess; 61 1st protrusion; 62 2nd protrusion.

Claims

1. An absorbent article in the form of underwear, wherein the absorbent article, in an underwear-shaped state having a waist opening and a pair of leg openings, has intersecting vertical, horizontal, and front-back directions. The above-mentioned absorbent underwear-type items have the following characteristics: An absorbent body having an absorbent core arranged along the above-mentioned vertical direction and a pair of leak-proof walls; The abdominal waistband portion, which joins the upper end of the aforementioned absorbent main body on the front side in the front-rear direction; and The back waist section, which is joined to the upper end of the aforementioned absorbent body on the rear side in the front-to-back direction, is characterized in that... In the natural state of the aforementioned underwear-style configuration, The aforementioned absorbent underwear-type garment, starting from the front side in the front-back direction, has in sequence: a first protrusion protruding downwards along the left-right direction from the absorbent main body, a concave portion protruding upwards along the left-right direction from the absorbent main body, and a second protrusion protruding downwards along the left-right direction from the absorbent main body. Within the range from the lower end of the first protrusion to the upper end of the recess, the absorbent core with thickness is stacked into four layers. The lower ends of the first protrusion and the second protrusion are offset in the vertical direction, and in the vertical direction, the lower end of the first protrusion is located below the upper end of the recess. The lower end of the second protrusion is located at a position lower than the lower end of the first protrusion, and the back waist portion has an extension that extends downward compared to the abdominal waist portion.

2. The absorbent underwear-type garment as described in claim 1, characterized in that, The first protrusion and the second protrusion respectively have peak-fold lines that fold the absorbent body along the left-right direction in such a way that the absorbent body protrudes downward. The aforementioned recess has a valley fold line that folds the absorbent body along the left-right direction in such a way that the absorbent body protrudes upward.

3. The absorbent underwear-type article as described in claim 1, characterized in that, In the packaged state, the two ends of the abdominal waist section and the back waist section in the left and right directions are folded back inward in the left and right directions by fold lines along the vertical direction. The aforementioned broken line is located on the outer side of the two ends of the aforementioned absorbent body in the left-right direction.

4. The absorbent underwear-type article as described in claim 1, characterized in that, In the packaged state, the upper ends of the aforementioned abdominal waistband and the aforementioned back waistband are folded back downwards along the aforementioned left-right fold lines. The length in the vertical direction from the upper end of the above-mentioned abdominal waist portion and the above-mentioned back waist portion to the above-mentioned fold line is less than the length in the vertical direction from the above-mentioned fold line to the upper end of the above-mentioned concave portion.

5. The absorbent underwear-type article as described in claim 1, characterized in that, The aforementioned absorbent entity possesses: The skin-friendly side panel is positioned closer to the wearer's skin than the absorbent core described above; and An elastic member, wherein the two sides of the elastic member extend and retract in the above-mentioned vertical direction. The aforementioned pair of leak-proof walls can be raised towards the skin side via the aforementioned elastic member. The above-mentioned absorbent body has: A front end fixing part, which fixes the leak-proof wall part to the upper end of the absorbent body on the front side so that it cannot stand up; A rear end fixing part, which fixes the leak-proof wall part to the upper end of the absorbent body on the rear side so that it cannot stand up; and An intermittent fixing part, which is positioned at a distance from the aforementioned front end fixing part and the aforementioned rear end fixing part in the vertical direction, fixes the aforementioned leak-proof wall part to the aforementioned skin side piece.

6. The absorbent underwear-type article as described in claim 5, characterized in that, The aforementioned recess has a valley fold line that folds the absorbent body along the left-right direction in such a way that the absorbent body protrudes upward. The portion of the folded absorbent core along the valley fold line is parallel to the intermittent fixing portion in the left-right direction.

7. The absorbent underwear-type article as described in claim 5 or 6, characterized in that, When the aforementioned absorbent underwear-type item is unfolded and stretched in the above-mentioned vertical direction... If the length in the vertical direction of the portion of the absorbent body between the area where the abdominal waistband joins the absorbent body and the area where the back waistband joins the absorbent body is defined as the first length. The length of the intermittent fixing part in the vertical direction is set as the second length. The second length is less than half the length of the first length, and the intermittent fixing part is positioned at a distance from the joint area in the vertical direction.

8. The absorbent underwear-type article as described in claim 5, characterized in that, When the aforementioned absorbent underwear-type item is unfolded and stretched in the above-mentioned vertical direction... The length of the leak-proof wall between the aforementioned front end fixing part and the aforementioned intermittent fixing part in the vertical direction is different from the length of the leak-proof wall between the aforementioned intermittent fixing part and the aforementioned rear end fixing part in the vertical direction.

9. The absorbent underwear-type article as described in claim 5, characterized in that, The aforementioned leak-proof wall portion has a base end region extending from the inner end of the aforementioned intermittent fixing portion in the left-right direction to the base end side of the aforementioned leak-proof wall portion, and an end region extending from the base end region to the end side of the aforementioned leak-proof wall portion. The aforementioned end region, located inside the aforementioned leak-proof wall portion in the left-right direction, has a joint where at least a portion of the opposing surfaces are joined together. When the aforementioned absorbent underwear-type item is unfolded and stretched in the above-mentioned vertical direction... The aforementioned joint portion is disposed at least on one of the positions of the intermittent fixing portion closer to the abdominal waist portion and the intermittent fixing portion closer to the dorsal waist portion.

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