Underpants-shaped absorbent article and method for manufacturing underpants-shaped absorbent article

Abstract

Provided is an underpants-shaped absorbent article (1) comprising an absorbent main body (10) and an exterior member (20) provided closer to the non-skin side than the absorbent main body (10), the exterior member (20) having a front torso section (FA) and a rear torso section (BA) that are joined to each other by a pair of side joining sections (60) provided on both sides in the left-right direction. A non-skin-side sheet (21) provided farthest from the non-skin side of the exterior member (20) has a hole (70) at least in a portion thereof. Each of the pair of side joining parts (60) has a plurality of individual joining parts (61, 62) disposed at intervals in the vertical direction. In the extended state, the area of the hole (70) is smaller than the area of the largest joint portion among the plurality of individual joint portions (61, 62).

Description

Technical Field

[0001] The present invention relates to a pant-shaped absorbent article and a method for producing the pant-shaped absorbent article. Background Art

[0002] Conventionally, a panty-shaped absorbent article is known in which an outer member such as a waist portion has a plurality of holes in order to improve air permeability. For example, Patent Document 1 discloses an absorbent article having the following structure: in a member (corresponding to the waist member) arranged on the ventral side or the dorsal side of the wearer, an outer sheet 22 located on the non-skin side and an inner sheet 23 located on the skin side are joined to each other by a joining portion 26 arranged in a dispersed manner, and a hole portion m is formed in a manner that each overlaps the entire joining portion 26 or a part of the joining portion 26.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-192862 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] However, when the waist member (exterior member) of the pant-shaped absorbent article has a visible hole, there is a risk that the user will have the impression that the exterior member is easy to tear. For example, when the side joints joining the ventral and dorsal sides of the waist member are torn in the action of removing the used pant-shaped absorbent article from the wearer's body, there is a risk that the user will worry that the exterior member will start to tear at the hole before the side joints are torn and excrement will leak out.

[0008] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a pants-shaped absorbent article including an exterior member having holes, which makes the user less likely to have the impression that the exterior member is easily torn.

[0009] Solutions for solving problems

[0010] The main aspect of the present invention to achieve the above-mentioned aspects is a pant-shaped absorbent article having an up-down direction, a left-right direction and a front-to-back direction that intersect each other, the pant-shaped absorbent article comprising: an absorbent body having liquid absorbency; and an outer casing member, which is arranged on the non-skin side relative to the absorbent body, at least a portion of the outer casing member being stretchable along the left-to-right direction; the outer casing member comprising: a front waist portion, which is arranged on the front side in the front-to-back direction; and a rear waist portion, which is arranged on the rear side in the front-to-back direction, the front waist portion and the rear waist portion being joined to each other by a pair of side joints arranged on both side portions in the left-to-right direction, a hole being provided in at least a portion of the non-skin side piece of the outer casing that is farthest from the non-skin side, each of the pair of side joints having a plurality of separate joints intermittently arranged along the up-down direction, and in the stretched state, the area of ​​the hole is smaller than the area of ​​one of the plurality of separate joints having the largest area.

[0011] Other features of the present invention will become apparent by reading the description of this specification with reference to the accompanying drawings.

[0012] Effects of the Invention

[0013] According to the present invention, in a pants-type absorbent article including an exterior member having holes, a user is less likely to have the impression that the exterior member is easily torn. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] [ Figure 1 ] Figure 1 : is a schematic perspective view illustrating an example of the structure of the sanitary napkin 1.

[0015] [ Figure 2 ] Figure 2 is a schematic plan view of the sanitary napkin 1 in a developed and stretched state when viewed from the skin side in the thickness direction.

[0016] [ Figure 3 ] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along line AA.

[0017] [ Figure 4 ] Figure 4 Included are a plan view and a cross-sectional view of the absorbent body 10.

[0018] [ Figure 5 ] Figure 5 1 is a plan view of the hole 70 and the fusion zone 80 provided in the non-skin side sheet 21.

[0019] [ Figure 6 ] Figure 6 2 is a plan view illustrating the arrangement of the welded portion 90 .

[0020] [ Figure 7 ] Figure 7 It is a plan view of the pant-shaped sanitary napkin 1 in the stretched state.

[0021] [ Figure 8 ] Figure 8 A and Figure 8 B are schematic cross-sectional views each illustrating the shape of the hole 70 formed in the skin side sheet 21 in the thickness direction.

[0022] [ Fig. 9 ] Fig. 9 A is a schematic cross-sectional view of the non-skin side sheet 21 folded back at the upper end portion of the exterior member 20 when viewed in the lateral direction. Fig. 9 B is a diagram showing the thickness of the skin when viewed from the skin side in the unfolded and stretched state. Fig. 9 A is a plan view of the arrangement of the hole 70 at the folded portion 21ff.

[0023] [ Fig.10 ] Fig.10 is a flow chart showing the steps for manufacturing the sanitary napkin 1.

[0024] [ Fig.11 ] Fig.11 is a schematic diagram illustrating a manufacturing apparatus 100 for manufacturing a sanitary napkin 1 .

[0025] [ Fig.12 ] Fig.12 It is a diagram for illustrating the principle of the extension process.

[0026] [ Fig.13 ] Fig.13 yes Fig.12 Magnified view of area K in FIG. DETAILED DESCRIPTION

[0027] At least the following matters will become clear through the description of this specification and the accompanying drawings.

[0028] (Aspect 1)

[0029] A pant-shaped absorbent article having an up-down direction, a left-right direction, and a front-to-back direction that intersect each other, the pant-shaped absorbent article comprising: an absorbent body having liquid absorbency; and an outer casing member, which is arranged on a non-skin side relative to the absorbent body, at least a portion of the outer casing member being stretchable in the left-to-right direction; the outer casing member comprising: a front waist portion, which is arranged on the front side in the front-to-back direction; and a rear waist portion, which is arranged on the rear side in the front-to-back direction, the front waist portion and the rear waist portion being joined to each other by a pair of side joints arranged on both side portions in the left-to-right direction, a hole being provided in at least a portion of the non-skin side piece of the outer casing that is farthest from the non-skin side, each of the pair of side joints having a plurality of separate joints intermittently arranged in the up-down direction, and in an extended state, an area of ​​the hole is smaller than an area of ​​a joint having the largest area among the plurality of separate joints.

[0030] According to the pant-shaped absorbent article of aspect 1, when the front waistline and the rear waistline are pulled forward and backward in the action of removing the used pant-shaped absorbent article from the wearer's body, the side joints appear to be more easily torn with a smaller force than the holes. Therefore, compared with the opposite case (the case where the area of ​​the holes is larger than the area of ​​each side joint), the user is less likely to have the impression that the outer member is easy to tear.

[0031] (Aspect 2)

[0032] The underpants-type absorbent article according to aspect 1, wherein the non-skin side sheet is a nonwoven fabric sheet in which fibers are joined to each other by a plurality of dispersed fusion portions, and in the stretched state, the area of ​​the holes is larger than the area of ​​each of the fusion portions.

[0033] According to the underpants-type absorbent article of aspect 2, the area of ​​the hole is larger than the area of ​​the fusion portion, which increases the visibility of the hole. As a result, the user can more easily perceive that the article has good air permeability.

[0034] (Aspect 3)

[0035] According to aspect 1 or 2, the underwear-shaped absorbent article, wherein the outer structure has the non-skin side piece and the skin side piece adjacent to the skin side of the non-skin side piece, the skin side piece and the non-skin side piece are joined to each other by a plurality of dispersed welds, and in an extended state, the area of ​​each of at least some of the plurality of welds is smaller than the area of ​​the hole.

[0036] According to the underpants-type absorbent article of aspect 3, the holes are formed in such a manner that the areas of some welded portions are smaller than the areas of the holes, which makes the holes conspicuous. As a result, the user can more easily feel good breathability.

[0037] (Aspect 4)

[0038] The pant-shaped absorbent article according to any one of aspects 1 to 3, wherein in the stretched state, an area of ​​each of at least some of the plurality of welds is larger than an area of ​​the hole.

[0039] According to the underpants-type absorbent article of aspect 4, the holes are suppressed from looking too large. Thus, the user is less likely to have the impression that the outer covering member is easy to tear.

[0040] (Aspect 5)

[0041] A pant-shaped absorbent article according to any one of aspects 1 to 4, wherein in an unfolded and stretched state, when viewed in the thickness direction, in a region where the outer casing overlaps with the absorbent body, the area of ​​the weld is smaller than the area of ​​the hole, and in a region where the outer casing does not overlap with the absorbent body, the area of ​​the weld is smaller than the area of ​​the hole.

[0042] According to the underpants-type absorbent article of aspect 5, in the region where the outer member and the absorbent body overlap each other, the user is less likely to have the impression that the outer member is easily torn and that the excretion fluid such as menstrual blood absorbed by the absorbent body leaks to the non-skin side of the outer member through the hole. In addition, in the region where the outer member and the absorbent body do not overlap each other, the hole is also conspicuous. Accordingly, the user can more easily think that good air permeability is provided.

[0043] (Aspect 6)

[0044] The underpants-shaped absorbent article according to any one of aspects 1 to 5, wherein the non-skin side sheet has a hole edge protrusion that protrudes toward the non-skin side in the thickness direction along the peripheral edge of the hole.

[0045] According to the pant-shaped absorbent article of aspect 6, when the non-skin side sheet is observed from the non-skin side (from the outside), the light reflection of the hole edge protrusion appears different from the light reflection of the other parts. Therefore, the user can easily recognize that the hole is provided in the non-skin side sheet. Accordingly, the user can more easily think that it has good breathability.

[0046] (Aspect 7)

[0047] The underpants-shaped absorbent article according to any one of aspects 1 to 6, wherein the non-skin side sheet has a hole edge protrusion that protrudes toward the skin side in the thickness direction along the peripheral edge of the hole.

[0048] According to the pant-shaped absorbent article of aspect 7, during use of the pant-shaped absorbent article, friction between the non-skin side sheet and the clothes of the wearer is less likely to occur. Therefore, friction or tearing of the non-skin side sheet can be suppressed. In addition, the contact area between the non-skin side sheet and the skin side sheet disposed adjacent to the skin side is reduced. Therefore, it becomes easier to suppress the movement and leakage of moisture to the non-skin side of the outer member.

[0049] (Aspect 8)

[0050] A panty-shaped absorbent article according to any one of aspects 1 to 7, wherein the outer member has a folding portion, in which the non-skin side piece is folded downward at the upper end portion in the up-down direction, and in the unfolded state, when observed in the thickness direction, some of the holes arranged in the portion other than the folding portion of the non-skin side piece do not overlap with some of the holes arranged in the folding portion of the non-skin side piece.

[0051] According to the panty-shaped absorbent article of aspect 8, the folding portion holes provided in the folding portion and the non-folding portion holes provided in the portion other than the folding portion do not overlap each other, thereby suppressing excessive reduction in the strength of the folding portion at the upper end portion of the outer member. As a result, the waist opening is less likely to be torn.

[0052] (Aspect 9)

[0053] According to any one of aspects 1 to 8 of the underwear-shaped absorbent article, the outer structure has a folding portion, in which the non-skin side piece is folded downward at the upper end portion in the up-down direction, and in the unfolded state, when observed in the thickness direction, some of the holes arranged in the portion other than the folding portion of the non-skin side piece overlap with some of the holes arranged in the folding portion of the non-skin side piece.

[0054] According to the panty-shaped absorbent article of aspect 9, the folding portion holes provided in the folding portion and the non-folding portion holes provided in the portion other than the folding portion overlap each other, thereby making it easier to ensure the breathability of the upper end portion of the outer member. Therefore, it is possible to suppress the discomfort felt by the wearer in the waist opening when using the panty-shaped absorbent article.

[0055] (Aspect 10)

[0056] The pull-on absorbent article according to any one of aspects 1 to 9, wherein the non-skin side sheets have higher hydrophilicity than sheet members other than the non-skin side sheets constituting the exterior member.

[0057] According to the underpants-shaped absorbent article of aspect 10, moisture such as sweat on the wearer's skin can be absorbed from the skin side sheet side with lower hydrophilicity to the non-skin side sheet side with higher hydrophilicity, so that the moisture can be efficiently evaporated to the non-skin side (atmosphere side) through the plurality of holes. Accordingly, the outer casing is less likely to become stuffy.

[0058] (Aspect 11)

[0059] According to any one of aspects 1 to 10, the underwear-shaped absorbent article has a longitudinal direction and a transverse direction that intersect each other in an unfolded and stretched state, and in the absorbent body, a plurality of absorbent elastic members that stretch along the longitudinal direction are arranged at intervals along the left-right direction, and in the stretched state, the interval between two adjacent absorbent elastic members in the transverse direction is greater than the center-to-center distance between two adjacent holes in the transverse direction.

[0060] According to the pant-shaped absorbent article of aspect 11, one or more holes are necessarily provided between adjacent absorbent elastic members. In this way, the number of holes overlapping the crotch elastic region can be increased. When the crotch elastic region shrinks, the area of ​​each hole decreases. In this way, the holes are less likely to appear too large. Accordingly, it is less likely to cause the user to worry that menstrual blood or other excrement will leak through the holes in the crotch region. In this way, the good air permeability of the crotch region can be maintained, and it is less likely to cause the user to worry about the leakage of excrement.

[0061] (Aspect 12)

[0062] A panty-shaped absorbent article according to any one of aspects 1 to 11, wherein in a natural state, in an area of ​​the outer casing overlapping with the side joint relative to the up-down direction, the area of ​​the hole arranged in the portion where the outer casing overlaps with the absorbent body when viewed in the thickness direction is larger than the area of ​​the hole arranged in the portion where the outer casing does not overlap with the absorbent body when viewed in the thickness direction.

[0063] According to the panty-shaped absorbent article of aspect 12, in the portion of the outer member that is located between a pair of side joints (waist portion) and does not overlap with the absorbent body and is thin, the area of ​​each hole is prevented from appearing too large. Therefore, it is possible to make the user less likely to have the impression that the outer member is easy to tear. On the other hand, in the portion where the outer member is thick and overlaps with the absorbent body, the area of ​​each hole appears large. Accordingly, the user is more likely to have the impression that the breathability is good.

[0064] (Aspect 13)

[0065] According to any one of aspects 1 to 12, the non-skin side panels are formed by a sheet member extending continuously from the front waist portion to the rear waist portion, and in a natural state, at the lower end portion in the up-down direction of the underwear-shaped absorbent article, the area of ​​the holes arranged in the two end portions in the left-right direction of the non-skin side panels is larger than the area of ​​the holes arranged in the central portion in the left-right direction of the non-skin side panels.

[0066] According to the underpants-shaped absorbent article of aspect 13, at the lower end portion (crotch region) in the up-down direction, a portion of the non-skin side sheet extends outward in the left-right direction. Therefore, such an extended portion is easy to contact the wearer's groin and the wearer's legs. In such an extended portion, the area of ​​each hole appears larger than that of other portions. As a result, the user is easy to have an impression of good breathability in the portion that is easy to contact the legs.

[0067] (Aspect 14)

[0068] A pant-shaped absorbent article according to any one of aspects 1 to 13, wherein the skin side panel does not have the aperture.

[0069] According to the underpants-type absorbent article of aspect 14, the hole is less likely to be visually recognized from the skin side of the outer member during the wearing action of the underpants-type absorbent article. Therefore, the user is less likely to worry about strength.

[0070] (Aspect 15)

[0071] The underpants-type absorbent article according to any one of aspects 1 to 14, wherein when the exterior member in the unfolded state is viewed in the thickness direction, the underpants-type absorbent article has a portion where the welded portion and the hole do not overlap each other.

[0072] According to the underpants-type absorbent article of aspect 15, the outer covering member has a portion where the hole and the welded portion do not overlap each other, thereby suppressing a decrease in the joining strength of the outer covering member. Accordingly, the user is less likely to worry about the strength.

[0073] (Aspect 16)

[0074] A method for manufacturing a panty-shaped absorbent article, comprising: a conveying step, wherein a first sheet and a second sheet are conveyed along a conveying direction; a hole forming step, wherein a plurality of holes are formed in the first sheet; a stretching step, wherein the second sheet is subjected to a stretching treatment to exhibit stretchability along the conveying direction; an outer member forming step, wherein an outer member is formed by overlapping and joining the first sheet and the second sheet in a thickness direction; a transfer step, wherein an absorbent body having liquid absorbency is transferred to the outer member; a folding step, wherein the outer member and the absorbent body are folded in a cross direction intersecting the conveying direction; and a joining step, wherein the folded outer member in a superimposed state in the thickness direction is joined at a plurality of separate joining portions intermittently arranged along the cross direction, the area of ​​the holes formed in the hole forming step being smaller than the area of ​​one joining portion having the largest area among the plurality of separate joining portions formed in the joining step.

[0075] According to the method for manufacturing a pant-shaped absorbent article of aspect 16, it is possible to realize a pant-shaped absorbent article in which, when the outer member is pulled in the front-back direction in the action of removing the used pant-shaped absorbent article from the body of the wearer, it appears that the single joint portion (side joint portion) is more likely to be torn with a smaller force than the hole. Therefore, compared with the opposite case (a case in which the area of ​​the hole is larger than the area of ​​the side joint portion), the user is less likely to have the impression that the outer member is easy to tear.

[0076] (Aspect 17)

[0077] A method for manufacturing a panty-shaped absorbent article according to aspect 16, wherein the stretching process is performed by passing the second sheet between a pair of gear rollers, each gear roller having a plurality of teeth on a circumferential surface, and a pitch between the teeth arranged on the circumferential surface of the gear roller being smaller than a center-to-center distance between two adjacent holes in the conveying direction.

[0078] According to the manufacturing method of the underpants-shaped absorbent article of aspect 17, when the first sheet (non-skin side sheet) and the second sheet (skin side sheet) are joined to each other, the hole is less likely to be included between the wrinkles that occur in the second sheet. Therefore, the strength reduction of the second sheet (non-skin side sheet) is suppressed. Therefore, the skin side sheet is less likely to tear. Accordingly, the user is less likely to have the impression that the outer member is easy to tear.

[0079] (Aspect 18)

[0080] According to the manufacturing method of the underwear-shaped absorbent article of aspect 16, the stretching process is performed by passing the second sheet between a pair of gear rollers, each gear roller having a plurality of teeth on its circumferential surface, and a pitch between the teeth arranged on the circumferential surface of the gear roller being greater than the center-to-center distance between two adjacent holes in the conveying direction.

[0081] According to the manufacturing method of the underpants-shaped absorbent article of aspect 18, when the first sheet (non-skin side sheet) and the second sheet (skin side sheet) are joined to each other, one or more holes are necessarily arranged between the wrinkles formed in the second sheet. Therefore, the second sheet (skin side sheet) is easier to bend at the hole, which increases softness. Accordingly, the second sheet (skin side sheet) is more likely to deform according to the concave-convex shape of the wearer's body, thereby improving softness and fit.

[0082] ===Implementation Method===

[0083] Hereinafter, a pant-type (underpants-shaped) sanitary napkin (hereinafter, also referred to as "sanitary napkin 1") will be taken as an example to explain the pant-shaped absorbent article according to an embodiment of the present invention. The pant-shaped absorbent article includes a pant-shaped diaper, a pant-shaped absorbent pad, and the like.

[0084] <Basic structure of sanitary napkin 1>

[0085] Figure 1 : is a schematic perspective view illustrating an example of the structure of the sanitary napkin 1 according to the present embodiment. Figure 2 is a schematic plan view of the sanitary napkin 1 in the unfolded and stretched state when viewed from the skin side in the thickness direction. Figure 3 It is along Figure 2 A schematic cross-sectional view taken along line AA.

[0086] Note that the "stretched state" of the sanitary napkin 1 refers to a state in which the entire sanitary napkin 1 (the entire product) is stretched to eliminate wrinkles by stretching the elastic components of the sanitary napkin 1 (for example, the absorbent elastic component 50 and the skin side panels 22 and 23 described later), or more specifically, refers to a state in which the size of the constituent components of the sanitary napkin 1 (for example, the outer component 20 described later) is consistent with or close to the size of the component itself.

[0087] exist Figure 1 In the panty-shaped state shown, the sanitary napkin 1 has a "up-down direction", "left-right direction" and "front-back direction" that are orthogonal to each other. Figure 3As shown, the sanitary napkin 1 has a "thickness direction" which is the direction in which the components are stacked on each other. When the wearer puts on the sanitary napkin 1, the "upper side" in the up-down direction is the side facing the wearer's torso, and the "lower side" in the up-down direction is the side facing the wearer's crotch area. In the wearing state, the "front side" in the front-to-back direction is the side corresponding to the wearer's abdomen, and the "back side" in the front-to-back direction is the side facing the wearer's back. When the wearer wears the sanitary napkin 1, the "skin side" in the thickness direction is the side in contact with the wearer's skin, and the "non-skin side" in the thickness direction is the opposite side.

[0088] exist Figure 2 In the unfolded state shown, the sanitary napkin 1 has a "longitudinal direction" and a "transverse direction" that are orthogonal to each other. The "longitudinal direction" is the direction corresponding to the up-down direction in the underpants-shaped state, and the "transverse direction" is the direction corresponding to the left-right direction in the shorts-shaped state.

[0089] The sanitary napkin 1 of this embodiment includes: an absorbent body 10 that has liquid absorbency and absorbs liquid such as urine; and an exterior member 20 that is disposed on the non-skin side of the absorbent body 10 and is disposed at the waist of the wearer when the sanitary napkin 1 is worn.

[0090] The sanitary napkin 1 includes an absorbent body 10 that has liquid absorbency and absorbs excretion fluid (liquid) such as menstrual blood, and an exterior member 20 that is disposed on the non-skin side of the absorbent body 10 and is disposed at the waist of the wearer when the sanitary napkin 1 is worn.

[0091] (Absorbent body 10)

[0092] Figure 4 The absorbent body 10 is shown in plan view and cross-sectional view. Figure 2 As shown, the absorbent body 10 of this embodiment has a substantially rectangular shape in a plan view, and the longitudinal direction (i.e., the long side direction of the absorbent body 10) corresponds to the up-down direction of the sanitary napkin 1. Figure 3 and Figure 4 As shown, the absorbent body 10 includes an absorbent core 11 extending in the longitudinal direction (up and down direction), a front sheet 12 arranged on the skin side relative to the absorbent core 11, a second sheet 13 arranged between the front sheet 12 and the absorbent core 11, a back sheet 14 arranged on the non-skin side relative to the absorbent core 11, and a side sheet 15 arranged on the non-skin side of the back sheet 14.

[0093] The absorbent core 11 is a member that absorbs and retains liquids such as menstrual blood, and is formed by using liquid absorbent fibers such as pulp fibers, etc. The absorbent core 11 can be formed with pulp fibers mixed with superabsorbent polymers (SAP). The outer peripheral surface of the absorbent core 11 can be covered with a liquid-permeable sheet member (core wrap sheet 11b) made of tissue paper, nonwoven fabric, etc.

[0094] The front sheet 12 is a liquid-permeable sheet member that can come into contact with the wearer's skin during use, and is made of, for example, a hydrophilic air-permeable nonwoven fabric sheet or a spunbonded nonwoven fabric sheet.

[0095] The second sheet 13 is a sheet member having substantially the same function and configuration as those of the front sheet 12, and is superposed on the non-skin side of the front sheet 12. The second sheet 13 is not necessarily provided in the absorbent body 10.

[0096] The back sheet 14 is a breathable but liquid-impermeable sheet member (breathable sheet member) for suppressing leakage of liquid such as menstrual blood absorbed by the absorbent core 11, and is formed using, for example, a resin film.

[0097] The side sheet 15 is a sheet member superposed on the non-skin side of the back sheet 14 and is made of, for example, a hydrophobic nonwoven sheet such as an SMS (spunbond-meltblown-spunbond) nonwoven sheet. In the present embodiment, the side sheet 15 forms a pair of leakage preventing walls 30 .

[0098] A pair of anti-leakage walls 30 are provided on both sides of the absorbent body 10 in the lateral direction (left-right direction), and are portions corresponding to so-called three-dimensional gathers. When the sanitary napkin 1 is worn, the anti-leakage walls 30 stand up from both sides of the absorbent body 10 in the left-right direction toward the wearer's skin, thereby preventing excretion fluid such as menstrual blood from leaking outward from the absorbent body 10 through the wearer's skin in the left-right direction.

[0099] In this embodiment, if Figure 4 As shown in the cross-sectional view of FIG. 1 , the side sheet 15 extends outward on both sides of the absorbent core 11 in the transverse direction (left-right direction), and is folded toward the skin side in the thickness direction at both ends of the absorbent body 10 in the left-right direction, and the end 15t of the side sheet 15 is arranged on the skin side relative to the absorbent core 11. In the end 15t, as shown in FIG. Figure 4 As shown, the side sheet 15 is folded back in a manner overlapping itself in the thickness direction, and a leakage-proof wall elastic member 31 in a state stretched in the longitudinal direction is provided between the overlapping portions of the side sheet 15. When the sanitary napkin 1 is put on, due to the elasticity of the leakage-proof wall elastic member 31, the end 15t of the leakage-proof wall portion 30 contracts in the longitudinal direction (up and down direction), thereby causing the absorbent body 10 to easily fit around the legs of the wearer.

[0100] The absorbent body 10 is also provided with a high-density portion 40 in which the absorbent core 11 has a higher density than the surrounding portion. The high-density portion 40 is formed by compressing the components forming the absorbent body 10 in the thickness direction. Figure 4 As shown, the high-density portion 40 is linear and is formed by a plurality of point-shaped compression portions arranged side by side. Hereinafter, the high-density portion 40 is also referred to as a "linear compression portion 40". Providing such a linear compression portion 40 (high-density portion 40) suppresses the situation where the absorbent core 11 is deformed due to the diffusion of the liquid-absorbent fibers. When the sanitary napkin 1 is worn, the linear compression portion 40 acts as a bending point, thereby allowing the absorbent core 11 to easily deform in three dimensions according to the body shape of the wearer and achieve a good fit to the wearer's body.

[0101] The absorbent body 10 is provided with a plurality of absorbent elastic members 50 that are stretched in the longitudinal direction (vertical direction). The absorbent elastic members 50 are formed using, for example, elastic threads, and are arranged on the non-skin side (specifically, between the back sheet 14 and the side sheet 15) relative to the absorbent core 11 when stretched in the longitudinal direction (vertical direction) by a predetermined stretching ratio. In the sanitary napkin 1 of the present embodiment, as shown in FIG. Figure 4 As shown, four absorbent elastic members 50 are arranged at predetermined intervals in the left-right direction. Here, the "extension ratio" of the elastic member is a value obtained by dividing the length of the elastic member in the extended state by the length of the elastic member in the natural state. The elasticity exhibited by the absorbent elastic member 50 enables the absorbent body 10 to be stretched and contracted in the longitudinal direction, and when the sanitary napkin 1 is worn, the absorbent body 10 is easy to fit to the crotch area (the area between the legs) of the wearer, which can improve the absorbency of excrement such as menstrual blood. Note that the number of absorbent elastic members 50, their configuration, extension ratio, etc. can be changed as appropriate.

[0102] (Exterior member 20)

[0103] The exterior member 20 is a sheet member disposed on the non-skin side of the absorbent body 10, and includes a non-skin side sheet 21 and skin side sheets 22 and 23. Figure 2 As shown in FIG. 1 , the “front waistline portion FA” corresponds to the portion of the exterior member 20 formed on the front side ( Figure 1 The "rear waist portion BA" corresponds to the portion of the outer member 20 formed on the rear side ( Figure 1 The "crotch region CA" corresponds to a region between the rear end of the front waist portion FA and the front end of the back waist portion BA in the longitudinal direction. The side joining portion 60 will be described later.

[0104] The non-skin side sheet 21 is a non-stretchable sheet member disposed at the farthest point on the non-skin side of the sanitary napkin 1 and is formed, for example, using a spunbonded nonwoven fabric or an SMS nonwoven fabric. Figure 2 As shown, the non-skin side sheet 21 is formed so as to shrink inward in the crotch region CA. A plurality of holes 70 and fusion portions 80 are discretely provided on the entire surface of the non-skin side sheet 21. Figure 5 1 is a plan view illustrating the hole 70 and the fusion portion 80 provided in the non-skin side sheet 21 .

[0105] Each hole 70 is a through hole that penetrates the non-skin side sheet 21 in the thickness direction. In the sanitary napkin 1, each hole 70 is a roughly circular hole with a diameter φ70 of approximately 0.55 mm to 1.0 mm, and is configured so that the center distance p70 between two adjacent holes 70 (i.e., the pitch between the holes 70) is approximately 2.0 mm to 4.0 mm. In the non-skin side sheet 21, the area where a plurality of holes 70, 70... are provided is also referred to as a "hole area 70A". In the present embodiment, although the hole area 70A is formed on the entire non-skin side sheet 21, the hole area 70A may also be formed in a portion of the non-skin side sheet 21. The hole 70 is formed in the manufacturing process of the sanitary napkin 1 to be described later (see Fig.10 The size and configuration of each hole 70 can be adjusted as appropriate.

[0106] The fusion portions 80 are all portions of a sheet formed by joining the fibers constituting the non-skin side sheet 21 (non-woven fabric sheet) to each other. For example, in the manufacturing process of the non-woven fabric sheet, the fusion portions 80 are formed by embossing the fibers (net) deposited on a flat surface. By dispersing the fusion portions 80, the non-skin side sheet 21 as a sheet member can maintain softness while ensuring sufficient strength. In the sanitary napkin 1, the fusion portions 80 are all rectangular in shape with a side length of approximately 0.3 mm to 0.5 mm, and are dispersed in such a manner that the center distance p80 between two adjacent fusion portions 80 (i.e., the pitch between the fusion portions 80) is approximately 1.0 mm to 2.0 mm. In the present embodiment, as Figure 5 As shown, the fused portions 80 are dispersed throughout the aperture region 70A in a generally grid-like pattern.

[0107] The skin side sheet 22 is a stretch sheet member stacked on the skin side of the non-skin side sheet 21 at the front side in the longitudinal direction. In the sanitary napkin 1, the skin side sheet 22 exhibits stretchability in the left-right direction. For example, the skin side sheet 22 is made of a stretchable nonwoven fabric. The term "stretchable nonwoven fabric" refers to a nonwoven fabric that contains stretchable fibers having a certain stretchability and extensibility fibers having a lower stretchability than the stretchable fibers, and has been subjected to an appropriate stretching treatment such as gear stretching. In the skin side sheet 22 of the present embodiment, fibers made of a polyurethane-based elastomer (an elastic thermoplastic elastomer) can be used as the stretchable fibers, and fibers made of polypropylene (PP) which is a polyolefin-based resin (a non-elastic thermoplastic resin) can be used as the extensibility fibers. The stretchable nonwoven fabric is formed in the stretching step (S103) of the manufacturing process of the sanitary napkin 1 to be described later (see Fig.10 ).

[0108] The skin side sheet 23 is a stretchable sheet member which is overlapped on the skin side of the non-skin side sheet 21 at the rear side (back side) in the longitudinal direction. The skin side sheet 23 has the same configuration as the skin side sheet 22.

[0109] The skin side sheets 22 and 23 are joined to the non-skin side sheets 21 by dispersed welded portions 90. Therefore, the outer member 20 is given elasticity in the left-right direction at least in the front waistline portion FA and the back waistline portion BA. In the present embodiment, the welded portions 90 are formed using known joining means such as ultrasonic welding.

[0110] Figure 6 2 is a plan view illustrating the arrangement of the welded portion 90 . Figure 6 The figure shows a state in which the base sheets (non-skin side sheet 21 and skin side sheets 22, 23) constituting the outer cover member 20 are joined together in the thickness direction by the welded portion 90 in the unfolded and stretched state. Figure 6 The figure shows the process of cutting for forming the leg opening 1b (in Figure 6 During the manufacturing process, the welded portion 90 is also formed in the portion where the skin side sheets 22, 23 and the non-skin side sheet 21 do not overlap each other (for example, a portion of the crotch area CA).

[0111] exist Figure 6In the sanitary napkin 1, when the outer member 20 in the unfolded and stretched state is observed in the thickness direction, the shaded area in the area where the outer member 20 overlaps with the absorbent body 10 is defined as area Y, and the area outside area Y is defined as area X. In the sanitary napkin 1, the weld 90 formed in area X has a different size and pattern from the weld 90 formed in area Y. Specifically, the area of ​​each weld 92 formed in area Y is larger than the area of ​​the weld 91 formed in area X. In addition, the weld 92 is formed more densely than the weld 91. That is, the total area of ​​the welds 92 formed per unit area in area Y (hereinafter, also referred to as "area ratio") is larger than the total area (area ratio) of the welds 91 formed per unit area in area X.

[0112] The larger the area ratio of the weld 90, the higher the joining strength between the skin side sheets 22, 23 and the non-skin side sheets 21. Therefore, during the use of the sanitary napkin 1, in the area X where the outer member 20 (non-skin side sheet 21) contacts the wearer's skin, the reduction in the area ratio of the weld 91 results in low rigidity of the outer member 20. Therefore, it is easier to deform. This prevents the outer member 20 from being formed to have an overly hard texture and makes it easier to fit the wearer's body. On the other hand, in the area Y, during the use of the sanitary napkin 1, the absorbent body 10 is interposed between the outer member 20 (non-skin side sheet 21) and the wearer's skin. As a result, the outer member 20 is less likely to come into direct contact with the wearer's skin. Therefore, even if Figure 6 Even when the area ratio of the welded portion 92 shown in the figure is increased, the texture and fit of the exterior member 20 are less likely to deteriorate, and therefore the joining strength between the skin side sheets 22 and 23 and the non-skin side sheet 21 can be high.

[0113] In the exterior member 20, a portion of the non-skin side sheet 21 is folded downward at the upper end portion in the up-down direction. Figure 3 In the embodiment, the non-skin side sheet 21 has a folded portion 21ff, which is a portion folded back at the front folding position FL20f toward the lower side in the up-down direction (toward the rear side in the longitudinal direction) and toward the skin side in the thickness direction. The folded portion 21ff is at least partially bonded to a sheet member (such as a hot melt adhesive) adjacent to the folded portion 21ff in the thickness direction. Figure 3In the thickness direction, a waist elastic member 25f extending in the transverse direction (left-right direction) can be provided at a position between the folded portion 21ff and the sheet member (skin side sheet 22) adjacent to the folded portion 21ff in the thickness direction. For example, an elastic line can be used for the waist elastic member 25f, and the waist elastic member 25f is fixed to the outer member 20 in a transversely stretched state. The waist elastic member 25f shrinks laterally, which improves the fit of the waist opening 1a described later at the front waist portion FA of the sanitary napkin 1.

[0114] Similarly, in Figure 3 In the sanitary napkin 1, the non-skin side sheet 21 has a folding portion 21bf, which is a portion folded back toward the lower side in the up-down direction (toward the front side in the longitudinal direction) and toward the skin side in the thickness direction at the rear folding position FL20b. In the thickness direction, a waist elastic member 25b extending in the transverse direction (left-right direction) can be provided at a position between the folding portion 21bf and a sheet member (skin side sheet 23) adjacent to the folding portion 21bf in the thickness direction. The waist elastic member 25b improves the fit of the waist opening 1a described later at the rear waist portion BA of the sanitary napkin 1.

[0115] Figure 7 1 is a plan view of a panty-shaped sanitary napkin 1 in an extended state. Figure 2 The absorbent body 10 and the outer member 20 in the unfolded state are folded in half in the longitudinal direction at the central position CL in the longitudinal direction, as shown in FIG. Figure 7 In such a folded state, in the outer member 20, the lateral side portions 20fe of the front waist portion FA and the lateral side portions 20be of the back waist portion BA are overlapped with each other in the front-to-back direction and joined together using known joining means such as sealing welding, thereby forming a pair of side joint portions 60. Therefore, the two parts of the folded outer member 20 are connected at the front and rear sides to form a ring, thereby forming a Figure 1 and Figure 7 The waist opening 1a and the pair of leg openings 1b shown provide a pant-shaped sanitary napkin 1.

[0116] In the sanitary napkin 1, the side joint 60 is formed by a plurality of independent joints 61, 62 intermittently arranged in the up-down direction (longitudinal direction). Figure 7In it, independent joints 61, 61... each having a shape long in the left-right direction are arranged at a predetermined interval in the up-down direction. Independent joints 62, 62... each having a shape long in the left-right direction are arranged inside the independent joints 61 in the left-right direction and are arranged at a predetermined interval in the up-down direction. When removing the used sanitary napkin 1 from the wearer, the side joint 60 can separate the front waist part FA and the back waist part BA connected in a ring shape to the front side and the back side. At this time, in the side joint 60, each joint 61, 62 arranged intermittently in the up-down direction functions like a perforation. In this way, the side joint 60 can be easily torn. However, the side joint 60 can be formed by one type of independent joint.

[0117] <Details of the hole 70>

[0118] In the sanitary napkin 1 of the present embodiment, a plurality of holes 70, 70... (hole area 70A) are provided on the entire outer member 20 (non-skin side piece 21). The holes 70 can enhance the air permeability of the sanitary napkin 1, and the holes 70 visually recognizable from the outside can give the user the impression that the sanitary napkin 1 is less likely to get stuffy.

[0119] On the other hand, providing the holes 70 on the outer member 20 gives the user the impression that the outer member is easy to tear. For example, when removing the used sanitary napkin 1 from the wearer, the following operation is usually performed: the operation of tearing (peeling) the side joint 60 by grasping the upper end part (lower end part) of the front waist part FA and the upper end part (lower end part) of the back waist part BA and pulling the end parts in the front-back direction. There is a risk that the user is worried that in the operation of pulling the waist parts FA and BA in the front-back direction, the outer member 20 starts to tear at the holes 70, resulting in leakage of excrement.

[0120] Then, in the sanitary napkin 1 in the extended state, in each of the joints 61 and 62 constituting the side joint 60, taking the area of the largest joint as the area S60M, each hole 70 is configured such that the area S70 of each hole 70 is smaller than the area S60M (S70 < S60M). With such a configuration, when pulling the waist parts FA, BA in the front-back direction, compared with the holes 70, the side joint 60 (each joint 61, 62) seems to be easier to tear with a smaller force. That is to say, it seems that the side joint 60 can be easily peeled off without tearing the outer member 20 having the holes 70. Therefore, compared with the opposite situation (S70 > S60M, that is, the area of each hole 70 is larger than the area of the independent joints 61, 62), the user is less likely to have the impression that the outer member 20 is easy to tear.

[0121] Preferably, the area S70 of each hole 70 is larger than the area S80 of each melting part 80, 80... provided in the outer package member 20 (non-skin side piece 21). Generally, in the process of manufacturing a non-woven fabric such as a spunbond non-woven fabric, the melting parts 80 are formed in a wide area of the entire non-woven fabric. Therefore, when the area S70 of each hole 70 is smaller than the area S80 of each melting part 80, there is a risk that the user is less likely to (visually) recognize the hole 70. On the other hand, in the sanitary napkin 1 of the present embodiment, the area S70 of each hole 70 is larger than the area S80 of each melting part 80 (S70 > S80), which increases the visibility of the hole 70. This allows the user to more easily think of good air permeability.

[0122] In addition, preferably, the area S90 of each welding part 90 in at least some of the welding parts 90, 90... that join the non-skin side piece 21 and the skin side pieces 22, 23 is smaller than the area S70 of each hole 70. Similar to the above-mentioned melting part 80, during the manufacturing process ( Fig.10 S104 in) of the outer package member 20, the welding parts 90 are formed in a wide range of the entire outer package member 20. Therefore, in the part where the area S70 of each hole 70 is smaller than the area S90 of each welding part 90, the hole 70 is less likely to be prominent, which results in the risk that the user is less likely to (visually) recognize the hole 70. In comparison, in the sanitary napkin 1 of the present embodiment, in Figure 6 the welding parts 90, 90... shown, the area S91 of each welding part 91 formed in at least the region X is smaller than the area S70 of each hole 70 (S70 > S91). This increases the visibility of the hole 70. As a result, the user can more easily think of good air permeability.

[0123] On the other hand, in the welding parts 90, 90..., the area S90 of each welding part 90 in at least some of the welding parts 90 can be larger than the area S70 of each hole 70. As described above, when the hole 70 is too prominent, there is an impression that the outer package member 20 is prone to tearing for the user. In comparison, in the sanitary napkin 1 of the present embodiment, each hole 70 is formed such that in Figure 6 the welding parts 90, 90... shown, the area S92 of each welding part 92 formed in at least the region Y is larger than the area S70 of each hole 70 (S70 < S92). This can prevent the hole 70 from looking too large. Therefore, the user is less likely to have the impression that the outer package member 20 is prone to tearing.

[0124] As Figure 6As shown, when the sanitary napkin 1 (exterior member 20) in the unfolded and stretched state is observed in the thickness direction, in the region Y where the exterior member 20 and the absorbent body 10 overlap each other, the area S70 of each hole 70 is smaller than the area S92 of each weld 92.

[0125] Therefore, in the region Y, the user is less likely to have the impression that the outer member 20 is easily torn, and is less likely to have the impression that the excretion fluid such as menstrual blood absorbed by the absorbent body 10 passes through the hole 70 and leaks toward the non-skin side of the outer member 20.

[0126] exist Figure 6 In the region X where the outer member 20 and the absorbent body 10 do not overlap each other, the area S70 of each hole 70 is larger than the area S91 of each welded portion 91. That is, the hole 70 is easily noticeable. In the region X where the outer member 20 and the absorbent body 10 do not overlap each other, the menstrual blood absorbed by the absorbent body 10 is less likely to pass through the hole 70 and leak toward the non-skin side of the outer member 20. Therefore, by making the hole 70 more noticeable, the user can easily think that there is good breathability without the user worrying about leakage.

[0127] Figure 8 A and Figure 8 B is a schematic cross-sectional view illustrating the shape in the thickness direction of the hole 70 formed in the non-skin side sheet 21. In the present embodiment, each hole 70 is formed by allowing the tip end portion of a pointed pin to penetrate the non-skin side sheet 21 from one side to the other side in the thickness direction. At this time, the portion around the periphery of each hole 70 protrudes toward the other side in the thickness direction (the side into which the pin is pushed). Figure 8 A illustrates a hole edge protrusion 71 protruding toward the non-skin side in the thickness direction along the peripheral edge of the hole 70. When the non-skin side sheet 21 is observed from the non-skin side in a state where the hole edge protrusion 71 protrudes toward the non-skin side, light reflection at the hole edge protrusion 71 appears different from light reflection at other portions. Therefore, it is easier to visually recognize the peripheral edge of each hole 70 from the non-skin side, and thus, the user can easily recognize that the hole 70 is provided in the non-skin side sheet 21. Therefore, the user can easily think that good air permeability is provided.

[0128] on the other hand, Figure 8 B shows the hole edge protrusion 72 protruding toward the skin side in the thickness direction along the peripheral edge of the hole 70. In this case, since no portion protruding toward the non-skin side is formed on the non-skin side of the non-skin side sheet 21, Figure 8Compared with the case of A (hole edge protrusion 71), during the use of the sanitary napkin 1, friction between the non-skin side sheet 21 and the wearer's clothes is less likely to occur. Therefore, it is possible to suppress the scratching or tearing of the non-skin side sheet 21 caused by the hole edge protrusion 72 being caught on the wearer's clothes. In addition, making the hole edge protrusion 72 protrude toward the skin side reduces the friction between the non-skin side sheet 21 and the skin side sheets 22, 23 ( Figure 8 B). Therefore, it becomes easier to suppress the movement and leakage of moisture toward the non-skin side of the exterior member 20.

[0129] As described above, the exterior member 20 has the folded portions 21ff and 21bf formed by folding down the upper end portions (front and rear ends in the longitudinal direction) of the non-skin side sheet 21. The holes 70 are also provided in the folded portions 21ff and 21bf. Fig. 9 A is a schematic cross-sectional view of the non-skin side sheet 21 folded back at the upper end portion of the exterior member 20 when viewed in the lateral direction. Fig. 9 B is a diagram showing the skin in the unfolded and stretched state as viewed from the thickness direction. Fig. 9 A is a plan view of the arrangement of the hole 70 at the folded portion 21ff. Fig. 9 A and Fig. 9 B shows only the non-skin side sheet 21 among the components constituting the exterior member 20. Fig. 9 A and Fig. 9 In B, the hole 70 provided in the folding portion 21ff of the non-skin side piece 21 is called the folding portion hole 70f, and the hole 70 provided in the portion other than the folding portion 21ff of the non-skin side piece 21 (i.e., the non-folding portion) is called the non-folding portion hole 70i.

[0130] In sanitary napkin 1, as Fig. 9 As shown in B, when the folding portion 21ff is observed in the thickness direction, some folding portion holes 70f do not overlap with some non-folding portion holes 70i. The position of the hole 70 (70f, 70i) is displaced between the folding portion 21ff and the non-folding portion of the non-skin side sheet 21 stacked in the thickness direction. Such displacement makes it easier to maintain the strength at the upper end of the outer member 20. In the case where all the folding portion holes 70f and all the non-folding portion holes 70i are arranged in an overlapping manner, the material strength at the upper end of the outer member 20 is weakened, which leads to the risk that the upper end is easy to tear. In particular, such a portion forms the waist opening 1a and also corresponds to the portion where the waist elastic members 25f, 25b are provided. Therefore, during the use of the sanitary napkin 1, when the waist opening 1a is torn or the waist elastic members 25f, 25b fall off from the outer member 20, there is a risk that the fit is significantly deteriorated. In comparison, Fig. 9As shown in B, some of the folded portion holes 70f and some of the non-folded portion holes 70i do not overlap each other, which suppresses an excessive decrease in strength at the upper end portion of the exterior member 20. Therefore, the waist opening 1a is less likely to tear.

[0131] On the other hand, when the folding portion 21ff is observed in the thickness direction, there are also overlapping portions where some folding portion holes 70f and some non-folding portion holes 70i overlap with each other. In the case where all the folding portion holes 70f and all the non-folding portion holes 70i are displaced from each other, there is a risk of deterioration of the air permeability at the upper end portion of the outer member 20. Due to the presence of the folding portion 21ff, the number of sheets stacked at the upper end portion (waist opening 1a) of the outer member 20 is greater than the number of sheets stacked at other portions. The upper end portion of the outer member 20 also corresponds to a portion that is strongly subjected to the contraction force caused by the waist elastic members 25f, 25b. Therefore, when the air permeability in the waist opening 1a deteriorates, stuffiness is likely to occur. As a result, the wearer is more likely to feel uncomfortable. In comparison, if Fig. 9 By overlapping some of the folded portion holes 70f and some of the non-folded portion holes 70i with each other, it is easier to ensure air permeability at the upper end of the outer member 20. As a result, during use of the sanitary napkin 1, discomfort of the wearer in the waist opening 1a can be suppressed.

[0132] Among the components constituting the outer member 20, it is preferred that the hydrophilicity of the non-skin side sheet 21 is higher than the hydrophilicity of other components (e.g., the skin side sheets 22, 23). For example, during the use of the sanitary napkin 1, in the case of sweating around the waist of the wearer, due to the accumulation of moisture between the outer member 20 and the skin, there is a risk of being easily stuffy. In the case of high hydrophilicity of the non-skin side sheet 21 at the farthest point on the non-skin side in the outer member 20, moisture such as sweat on the skin of the wearer can be easily sucked from the skin side sheet 22, 23 side with lower hydrophilicity to the non-skin side sheet 21 side with higher hydrophilicity. In addition, in the present embodiment, a plurality of holes 70, 70 are provided in the non-skin side sheet 21. Therefore, the moisture sucked into the non-skin side sheet 21 can be effectively evaporated toward the non-skin side (atmosphere side). Therefore, the outer member 20 is unlikely to become stuffy.

[0133] As an example of a method for increasing the hydrophilicity of the non-skin side sheet 21, there is a method of attaching a predetermined oil agent to the nonwoven fabric sheet constituting the non-skin side sheet 21 for processing (hydrophilic treatment). As the oil agent used in the hydrophilic treatment, commercially available oil agents with antistatic effects on fibers, such as anionic oil agents, nonionic oil agents and mixtures thereof, can be used. These oil agents are placed in an oil tank and then oiled with an oiling roller or the like. As a result, the hydrophilicity of the nonwoven fabric can be increased to obtain a hydrophilic nonwoven fabric. However, a hydrophilic nonwoven fabric can be formed by other methods. For example, a hydrophilic nonwoven fabric can be obtained by using a highly hydrophilic fiber to manufacture a nonwoven fabric.

[0134] The hydrophilicity of the sheet member can be evaluated by measuring the contact angle when ion exchange water is brought into contact with the surface of the sheet member. Specifically, when the contact angle between the hydrophilic nonwoven fabric and the ion exchange water is less than the contact angle between the hydrophobic nonwoven fabric and the ion exchange water, the hydrophilicity of the hydrophilic nonwoven fabric becomes higher than the hydrophilicity of the hydrophobic nonwoven fabric. As the hydrophilic nonwoven fabric (non-skin side sheet 21) used in the present embodiment, the contact angle with the ion exchange water is expected to be less than 90 degrees, and more preferably 50 degrees or less. On the other hand, as the hydrophobic nonwoven fabric (skin side sheets 22 and 23), the contact angle with the ion exchange water is expected to be 90 degrees or more, and more preferably 120 degrees or more.

[0135] For example, the contact angle can be measured by the following method using a contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. First, ion exchange water (approximately 20 picoliters) is dropped onto the fiber surface constituting the sheet member (the sheet to be measured), and then the contact angle is immediately measured using the aforementioned contact angle meter. Measurement is performed at multiple locations (e.g., 5 or more locations) on the surface of the sheet to be measured, and the average value of these locations is defined as the contact angle. Note that the measurement environment temperature is set to 22°C.

[0136] Alternatively, the contact angle may be measured by taking an image of the measured sheet on which ion exchange water is dropped from a cross-sectional direction of the measured sheet, analyzing the taken image, and measuring an angle between the ion exchange water droplet and the measured sheet.

[0137] In the sanitary napkin 1, the center-to-center distance p70 (the pitch between the holes 70) between two laterally adjacent (left-right adjacent) holes 70 in the exterior member 20 is smaller than the interval p50 (the pitch between the absorbent elastic members 50) between two laterally adjacent (left-right adjacent) absorbent elastic members 50 in the absorbent body 10 (see Figure 4). The portion of the absorbent body 10 where the absorbent elastic members 50, 50... are provided (also referred to as the "crotch elastic region") contracts in the longitudinal direction in a natural state based on the stretchability exhibited by the absorbent elastic member 50. Therefore, when viewed in the thickness direction, the holes 70 arranged in the region overlapping with the crotch elastic region contract in the longitudinal direction as the crotch elastic region contracts. This reduces the area of ​​each hole 70. As a result, in the region overlapping with the crotch elastic region, the hole 70 is less likely to look too large. Therefore, it is less likely to cause the user to worry about excretion fluids such as menstrual blood leaking out through the holes 70 in the crotch region.

[0138] At this time, when the center-to-center distance p70 between the holes 70 is smaller than the interval p50 between the absorbent elastic members 50 (p50>p70), it is necessary to arrange one or more holes 70 between adjacent absorbent elastic members 50. That is, the number of holes 70 arranged to overlap with the crotch elastic region can be increased. Therefore, in the crotch region of the sanitary napkin 1, good air permeability can be maintained, and it is less likely to cause the user to worry about leakage of excrement.

[0139] The "natural state" refers to a state in which the sanitary napkin 1 is left alone for a predetermined period of time. For example, the sanitary napkin 1 in the product state is taken out of the package, and the outer member 20 is pulled outward in the left and right directions at both sides (20fe, 20be) to put the outer member 20 in the "extended state", and the extended state is maintained for 15 seconds, and then the sanitary napkin 1 is released and placed on a flat surface such as a desk.

[0140] The state after being left flat on a flat surface for 5 minutes is defined as the natural state.

[0141] In the front waist portion FA and the back waist portion BA of the sanitary napkin 1 in the natural state, the area of ​​each hole 70 arranged in the region overlapping with the absorbent body 10 is larger than the area of ​​each hole 70 arranged in the region not overlapping with the absorbent body 10. In other words, in the outer member 20, in the region overlapping with the side joint 60 with respect to the up-down direction (longitudinal direction), when viewed in the thickness direction, the area of ​​each hole 70 arranged in the region overlapping with the absorbent body 10 is larger than the area of ​​each hole 70 arranged in the region not overlapping with the absorbent body 10.

[0142] In the front waist part FA and the back waist part BA, since the outer covering member 20 is thinner in the area where the outer covering member 20 does not overlap with the absorbent body 10, there is a risk that the user has a low strength impression. Therefore, by making the area of ​​each hole 70 look not too large, the user is less likely to have the impression that the outer covering member 20 is easy to tear. On the other hand, since the outer covering member 20 looks thicker in the area where the outer covering member 20 overlaps with the absorbent body 10, there is a risk that the user has a low breathability impression. Therefore, by making the area of ​​each hole 70 look larger than other parts, it can be made easy for the user to have the impression of having good breathability.

[0143] At the lower end of the sanitary napkin 1 in the up-down direction in the natural state, the area of ​​each hole 70 disposed in the left-right direction (lateral direction) of the outer member 20 (non-skin side sheet 21) is greater than the area of ​​each hole 70 disposed in the central portion of the left-right direction (lateral direction). At the lower end (i.e., crotch region CA) of the sanitary napkin 1 in the up-down direction, a portion of the non-skin side sheet 21 extends outward beyond the left-right direction of the absorbent body 10. During the use of the sanitary napkin 1, such an extension is easy to contact the wearer's groin and the wearer's legs. Therefore, in such a portion that is easy to contact the wearer's groin and the wearer's legs, the area of ​​each hole 70 appears to be larger than other portions. Therefore, in the portion that is easy to contact the legs, the user can easily have the impression of good breathability.

[0144] In the sanitary napkin 1, in the sheet member forming the outer member 20, the skin side sheets 22, 23 arranged on the skin side are not provided with holes 70. That is, the hole 70 can be visually recognized on one side (non-skin side) in the thickness direction of the outer member 20, while the hole 70 cannot be visually recognized on the other side (skin side) in the thickness direction. In the case where the hole 70 can be visually recognized from both sides in the thickness direction, the strength of the outer member 20 is insufficient, which causes the user (wearer) to worry about the risk of the outer member 20 being torn when the outer member 20 is pulled during the placement action of the sanitary napkin 1. Then, in the present embodiment, since the hole 70 is not provided on the skin side sheets 22, 23 side, it is unlikely that the hole 70 is visually recognized from the skin side of the outer member 20 during the placement action of the sanitary napkin 1. As a result, the user is unlikely to have concerns about the strength of the sanitary napkin 1.

[0145] When the outer member 20 in the unfolded state is observed in the thickness direction, the sanitary napkin 1 has a portion where the hole 70 does not overlap with the weld 90. In the present embodiment, the non-skin side sheet 21 and the skin side sheets 22, 23 are joined to each other through the weld 90 to form the outer member 20. In the case where the hole 70 is provided and overlaps with all the welds 90, the joining strength between the non-skin side sheet 21 and the skin side sheets 22, 23 is reduced, which leads to the risk that the outer member 20 is easily peeled off or torn. Therefore, the outer member 20 has a portion where the hole 70 does not overlap with the weld 90, which suppresses the reduction of the joining strength of the outer member 20. Therefore, the user may be less likely to have concerns about strength.

[0146] <Method for manufacturing sanitary napkin 1>

[0147] Next, a method for manufacturing the sanitary napkin 1 will be described. Fig.10 is a flow chart showing the steps for manufacturing the sanitary napkin 1 . Fig.11 is a schematic diagram illustrating a manufacturing apparatus 100 for manufacturing a sanitary napkin 1. Fig.10 and Fig.11 In order to simplify the description, it is assumed that the absorbent body 10 is provided in a completed state, and the description of the manufacturing method of the absorbent body 10 will be omitted.

[0148] exist Fig.11 In the manufacturing apparatus 100 shown in FIG. 1 , by sequentially executing Fig.10 The manufacturing apparatus 100 includes a conveying mechanism 110, a hole forming mechanism 120, an extending mechanism 130, an ultrasonic welding mechanism 140, an absorbent body transferring mechanism 150, a folding mechanism 160, a joining mechanism 170 and a cutting mechanism 180.

[0149] In the manufacturing step of the sanitary napkin 1, a conveying step (S101) is performed in which various base sheets such as sheet members (21, 22, 23) constituting the outer member 20 are conveyed along a predetermined conveying direction. In the manufacturing apparatus 100, the conveying direction is the left-right direction (lateral direction) of the sanitary napkin 1. Hereinafter, the conveying direction is also referred to as the "MD direction", and the cross direction ( Fig.11 The direction of depth from the paper surface) is called the "CD direction".

[0150] In the conveying step, the non-skin side sheet continuous body 21a (corresponding to the first sheet) in a state where the non-skin side sheet 21 is continuous in the MD direction (left-right direction in the panty-shaped state) is fed from a web roll, and then conveyed from upstream to downstream in the MD direction at a predetermined conveying speed by a conveying mechanism 110. Similarly, the skin side sheet continuous bodies 22a, 23a (corresponding to the second sheet) in a state where the skin side sheets 22, 23 are continuous in the MD direction (left-right direction) are fed from a web roll, respectively, and then conveyed from upstream to downstream in the MD direction at a predetermined conveying speed by a conveying mechanism 110. Each step in steps S102 to S108 is performed during the conveying of each substrate sheet, thereby manufacturing a sanitary napkin 1.

[0151] First, a hole forming step (S102) is performed, in which a plurality of holes 70 are formed in the non-skin side sheet continuous body 21a conveyed in the MD direction. In the hole forming step, the pins 121 of the hole forming mechanism 120 set at a predetermined position in the MD direction are operated, and the terminal portion of each pin 121 penetrates the non-skin side sheet continuous body 21a in the thickness direction of the non-skin side sheet continuous body 21a, thereby forming a plurality of holes 70. At this time, a hole edge protrusion 71 (72) protruding along the penetration direction of each pin 121 is formed. It is acceptable that the hole forming mechanism 120 is constructed as a structure separated from the manufacturing device 100, so that the hole 70 is formed in the non-skin side sheet continuous body 21a before the non-skin side sheet continuous body 21a is supplied to the manufacturing device 100. That is, the hole 70 can be formed by online processing or offline processing. It is assumed that a plurality of melting parts 80 formed when manufacturing the non-woven fabric sheet are pre-set in the non-skin side sheet continuous body 21a.

[0152] Subsequently, a stretching step (S103) is performed in which the skin side sheet continuous body 22a (23a) conveyed in the MD direction is subjected to a stretching process to develop stretchability in the MD direction (cross direction). Fig.12 It is a diagram for illustrating the principle of the extension process. Fig.13 yes Fig.12 Magnified view of area K in FIG.

[0153] The gear roller 131 and the gear roller 132 act as a roller mechanism that is composed of a pair of upper and lower rollers and rotates around a rotation axis extending in the CD direction with the outer peripheral surfaces of the gear roller 131 and the gear roller 132 facing each other. On the outer peripheral surface of the gear roller 131, a plurality of peaks 131m (corresponding to gear teeth) and a plurality of valleys 131v are alternately formed in the rotation direction of the gear roller 131, and each peak 131m and each valley 131v extend in the CD direction. The peaks 131m and the valleys 131v do not necessarily have to be formed on the entire gear roller 131 in the CD direction, but may be formed in a local area on the outer peripheral surface of the gear roller 131 in the CD direction. Likewise, peaks 132m (gear teeth) and valleys 132v are alternately formed on the outer peripheral surface of the gear roller 132. When the gear rollers 131, 132 rotate, the peaks 131m and the valleys 132v mesh with each other with a slight gap in such a manner that the peaks 131m of one gear roller 131 enter the valleys 132v of the other gear roller 132. During such rotation, the skin side sheet continuous body 22a (23a) in an extended state passes between the pair of gear rollers 131 and 132 in the MD direction.

[0154] The skin side sheet continuous body 22a (23a) passing between a pair of gear rollers 131 and 132 is deformed into a three-point folded shape by the adjacent peaks 132m, 132m of one gear roller 132 and the peak 131m entering the valley 132v between the adjacent peaks 132m, 132m of the other gear roller 131 (see Fig.13 ). At this time, in the skin side sheet continuum 22a (23a), the first portion Sa contacts the top surface of the peak 132m of one gear roller 132 in a manner that does not move substantially relative to the top surface. Therefore, the first portion Sa is less likely to be extended. On the other hand, the second portion Sb between the two adjacent first portions Sa, Sa is extended in accordance with the entry of the peak 131m. As a result, the skin side sheet continuum 22a (23a) is processed so that the extended second portion Sb and the first portion Sa that is less likely to be extended than the second portion Sb are alternately arranged in the MD direction, as shown in FIG. Fig.13 As shown. Then, in the area of ​​the second portion Sb, the elongation fibers of the nonwoven fabric sheet constituting the skin side sheet continuum 22a (23a) are partially extended. That is, by passing between the pair of gear rollers 131 and 132, at least a portion of the elongation fibers of the skin side sheet continuum 22a (23a) becomes elongated. Therefore, the skin side sheet continuum 22a (23a) exhibits elasticity in the MD direction based on the elastic deformation of the elastic fibers.

[0155] When the skin side sheet continuum 22a (23a) is subjected to the stretching treatment, it is expected that the skin side sheet continuum 22a (23a) is preheated by using a heating device not shown in the figure to prevent the extensible fibers from being cut or the nonwoven fabric sheet from being torn. The heating conditions (heating temperature, heating time, etc.) are appropriately adjusted according to the type and melting point of the fibers constituting the nonwoven fabric sheet.

[0156] Next, an outer component forming step (S104) is performed, in which the outer component 20 is formed by superimposing and joining the non-skin side of the skin side sheet continuum 22a, 23a conveyed in the MD direction to the skin side of the non-skin side sheet 21 conveyed in the MD direction. In the outer component forming step, an ultrasonic welding mechanism 140 set at a predetermined position in the MD direction performs ultrasonic welding, in which ultrasonic vibration and pressure are applied to predetermined positions of the non-skin side sheet continuum 21a and the skin side sheet continuum 22a (23a). Therefore, the non-skin side sheet continuum 21a and the skin side sheet continuum 22a (23a) are connected through the above-mentioned multiple welding parts 90 (91, 92, see Figure 6 ) are joined to each other, which forms an outer packaging member continuous body 20a in which the outer packaging member 20 is continuous in the MD direction (the left-right direction in the underpants-shaped state).

[0157] Subsequently, a transfer step (S105) is performed in which the absorbent body 10 is transferred at a predetermined position on the skin side of the outer package member continuous body 20a. In the transfer step, the absorbent body 10 is transferred to the outer package member continuous body 20a by the transfer drum 151 provided in the absorbent body transfer mechanism 150.

[0158] A plurality of absorbent bodies 10 are arranged on the outer peripheral surface of the transfer drum 151 at predetermined intervals in the circumferential direction. Each absorbent body 10 is held so that its skin side faces the outer peripheral surface of the transfer drum 151. An adhesive is applied to the non-skin side of each absorbent body 10. The transfer drum 151 in the above state rotates at a predetermined speed, and at the moment when the skin side of the outer covering member continuum 20a contacts the non-skin side of the absorbent body 10, the hold of the absorbent body 10 on the transfer drum 151 is released. Then, the absorbent body 10 is pressed against the outer covering member continuum 20a in a manner that the absorbent body 10 is clamped in the thickness direction by the transfer drum 151 and the transfer drum 152 arranged on the non-skin side. As a result, the absorbent body 10 is joined to the outer covering member continuum 20a.

[0159] After that, the outer covering member continuous body 20a to which the absorbent body 10 has been transferred is cut for the leg openings 1b. Then, the folded portions 20bf, 20bn ( Fig.10 and Fig.11 not shown).

[0160] Next, a folding step (S106) is performed in which the absorbent body 10 and the outer member continuous body 20a are folded in half at a predetermined position in the CD direction. In the folding step, the folding mechanism 160 folds the absorbent body 10 and the outer member continuous body 20a in the CD direction at a position corresponding to the position of the absorbent body 10 and the outer member continuous body 20a. Figure 2 The outer casing member continuous bodies 20a, 20a are folded in half at the longitudinal center position CL to form folded outer casing member continuous bodies 20a, 20a which are stacked in the thickness direction.

[0161] Subsequently, a joining step (S107) is performed in which the folded outer member continuous body 20a in a superimposed state in the thickness direction is joined at positions corresponding to the lateral side portions 20fe, 20be of the sanitary napkin 1. In the joining step, the joining mechanism 170 performs sealing joining along the CD direction, and the side joining portion 60 is formed by a plurality of individual joining portions 61, 62 intermittently arranged in the CD direction. This makes the plurality of panty-shaped sanitary napkins 1 a continuous body extending in the MD direction, such as Figure 7 shown.

[0162] Next, a cutting step (S108) is performed in which the continuous body of the pant-shaped sanitary napkins 1 conveyed in the MD direction is cut into individual pant-shaped sanitary napkins 1, 1, ... In the cutting step, the continuous body of the pant-shaped sanitary napkins 1 arranged in the MD direction is cut at predetermined positions in the MD direction (corresponding to the positions of both ends in the transverse direction of the sanitary napkins 1) by the cutter rollers 181, 182 provided in the cutting mechanism 180. As a result, individual pant-shaped sanitary napkins 1 are manufactured.

[0163] The manufactured pant-shaped sanitary napkin 1 is folded on the downstream side in the MD direction with respect to the cutting mechanism 180. Then, the pant-shaped sanitary napkins 1 are packed individually or in groups in a packing member, and thereafter, packaged and shipped.

[0164] When the sanitary napkin 1 is manufactured in the above manner, it is preferred that the pitch pm between the peaks 131m (132m) provided along the circumferential surface of the gear roller 131 (132) used in the stretching process (in S103) is smaller than the pitch p70 between two holes 70 adjacent in the MD direction (the transverse direction of the panty-shaped sanitary napkin 1). In other words, it is preferred that the pitch pm in the circumferential direction between two teeth adjacent in the circumferential direction of the gear roller 131 (132) is smaller than the center-to-center distance p70 between two holes 70 adjacent in the MD direction (the transverse direction of the panty-shaped sanitary napkin 1).

[0165] As described above, in the stretching process, the skin side sheets 22, 23 (second sheets) are stretched by being sandwiched between the pair of gear rollers 131, 132. Fig.13As shown, the skin side pieces 22 and 23 are deformed in such a way as to have peaks and valleys in the thickness direction, and wrinkles are likely to be formed along the peaks and valleys. That is to say, in the skin side pieces 22 and 23, wrinkles having a size based on the pitch pm between two adjacent teeth (peaks 131m, 131m) are likely to be formed along the circumferential direction of the gear roller 131. In this case, when the pitch pm between the teeth is smaller than the pitch p70 in the lateral direction between the holes 70 (pm < p70), it is less likely that the holes 70 are overly included between the wrinkles formed in the skin side piece 22 (23). Therefore, it is suppressed that the holes 70 reduce the strength of the skin side piece 22 (23). As a result, the skin side piece 22 (23) is less likely to tear. Therefore, the user is less likely to have the impression that the outer member 20 is likely to tear.

[0166] On the other hand, the pitch pm between the peaks 131m (132m) provided along the circumferential surface of the gear roller 131 (132) used in the stretching process (in S103) can be larger than the pitch p70 between two adjacent holes 70, 70 in the MD direction (the lateral direction of the panty-shaped sanitary napkin 1). In other words, the circumferential distance pm between two adjacent teeth of the gear roller 131 (132) in the circumferential direction can be larger than the center-to-center distance p70 between two adjacent holes 70, 70 in the MD direction (the lateral direction of the panty-shaped sanitary napkin 1).

[0167] When the pitch pm between the teeth of the gear roller 131 (132) is larger than the pitch p70 of the holes 70, 70 in the lateral direction (pm > p70), one or more holes 70 need to be provided between the wrinkles generated in the skin side piece 22 (23). Therefore, in the skin side piece 22 (23), bending deformation that increases softness is more likely to occur at the holes 70. As a result, during the use of the sanitary napkin 1, the texture of the skin side piece 22 (23) that directly contacts the skin around the wearer's waist is softer. In addition, the skin side piece 22 (23) is more likely to deform according to the unevenness of the wearer's body, which improves softness and fit.

[0168] === Others ===

[0169] The above-described embodiments are intended to facilitate the understanding of the present invention and are not to be construed as limiting the present invention in any way. The present invention can be changed or modified in various ways without departing from its gist, and equivalents thereof are covered.

[0170] In the above-described embodiments, although the sanitary napkin 1 is described by taking the panty-shaped absorbent article as an example, the present invention is also applicable to absorbent articles other than sanitary napkins. For example, the panty-shaped absorbent article can be a panty-shaped diaper, a panty-shaped absorbent pad, etc. used by adults or infants.

[0171] In the above-mentioned embodiment, a panty-shaped absorbent article is taken as an example, and a sanitary napkin 1 (see FIG. 1 ) in which the outer casing 20 extends continuously from one side (front side) to the other side (rear side) in an integrated manner in the longitudinal direction is described. Figure 2 The front and rear sides of the outer member 20 may be separated from each other. That is, the sanitary napkin 1 may be a so-called three-piece pant-shaped absorbent article, which includes: a front outer member (front waist portion); a rear outer member (rear waist portion); and an absorbent body.

[0172] Description of Reference Numerals

[0173] 1. Sanitary napkin (underwear-shaped absorbent article),

[0174] 1a waist opening, 1b leg opening,

[0175] 10 absorbent body,

[0176] 11 absorbent core, 12 front sheet, 13 second sheet, 14 back sheet, 15 side sheet, 15t end portion,

[0177] 20 external member, 20fe side portion, 20be side portion,

[0178] 21 non-skin side piece, 21ff folding part, 21bf folding part,

[0179] 22 skin side piece, 23 skin side piece,

[0180] 25f waist elastic member, 25b waist elastic member,

[0181] 30 leakproof wall,

[0182] 31. Leakage-proof wall elastic member,

[0183] 40 high density part (linear compression part),

[0184] 50 absorbent elastic member,

[0185] 60 side joint,

[0186] 61 independent joint, 62 independent joint,

[0187] 70 holes, 70A hole area,

[0188] 70f is the hole of the return part, 70i is the hole of the non-return part,

[0189] 71 hole edge protrusion (skin side), 72 hole edge protrusion (non-skin side),

[0190] 80 molten part,

[0191] 90 welding part,

[0192] 91 welding part, 92 welding part,

[0193] 100 Manufacturing Equipment,

[0194] 110 conveying mechanism,

[0195] 120 hole forming mechanism, 121 pin,

[0196] 130 extension mechanism,

[0197] 131 gear roller, 131m peak, 131v valley,

[0198] 132 gear roller, 132m peak, 132v valley,

[0199] 140 ultrasonic welding mechanism,

[0200] 150 absorbent main body transfer mechanism, 151 transfer drum, 152 transfer drum,

[0201] 160 folding mechanism,

[0202] 170 joint mechanism,

[0203] 180 cutting mechanism, 181 cutter roller, 182 cutter roller,

[0204] 1a waist opening, 1b leg opening,

[0205] CL Central Location,

[0206] FL20f front folded position, FL20b rear folded position

Claims

1. A pant-shaped absorbent article having an up-down direction, a left-right direction, and a front-back direction intersecting each other, The pant-shaped absorbent article comprises: an absorbent body having liquid absorbency; and an outer covering member disposed on the non-skin side relative to the absorbent body, At least a portion of the exterior member is extendable and retractable in the left-right direction; The outer casing has: A front waist portion, which is arranged at the front side in the front-to-back direction; and a rear waist portion, which is arranged at the rear side in the front-rear direction, The front waist portion and the rear waist portion are joined to each other by a pair of side joining portions provided on both sides in the left-right direction. A hole is provided in at least a portion of the non-skin side sheet disposed farthest from the non-skin side in the exterior member, Each of the pair of side engaging portions has a plurality of individual engaging portions intermittently arranged along the up-down direction, In the extended state, the area of ​​the hole is smaller than the area of ​​one of the plurality of individual joining portions having the largest area.

2. The pant-shaped absorbent article according to claim 1, wherein: The non-skin side sheet is a nonwoven fabric sheet in which fibers are joined to each other via a plurality of dispersed fusion portions, and In the extended state, the area of ​​the hole is larger than the area of ​​each of the molten parts.

3. The panty-shaped absorbent article according to claim 1 or 2, wherein: The outer member includes the non-skin side sheet and a skin side sheet adjacent to the skin side of the non-skin side sheet. The skin side sheet and the non-skin side sheet are joined to each other by a plurality of dispersed welded portions, and In the extended state, an area of ​​each of at least some of the plurality of welds is smaller than an area of ​​the hole.

4. The pant-shaped absorbent article according to claim 3, wherein: In the extended state, an area of ​​each of at least some of the plurality of welds is larger than an area of ​​the hole.

5. The pant-shaped absorbent article according to claim 4, wherein: In the unfolded and stretched state, when viewed in the thickness direction, In a region where the exterior member overlaps the absorbent body, the weld has an area smaller than an area of ​​the hole, and In a region where the exterior member and the absorbent body do not overlap, an area of ​​the welded portion is smaller than an area of ​​the hole.

6. The pant-shaped absorbent article according to claim 3, wherein: The non-skin side sheet has a hole edge protrusion that protrudes toward the non-skin side in the thickness direction along the peripheral edge of the hole.

7. The pant-shaped absorbent article according to claim 3, wherein: The non-skin side sheet has a hole edge protrusion that protrudes toward the skin side in the thickness direction along the peripheral edge of the hole.

8. The pant-shaped absorbent article according to claim 3, wherein: The exterior member has a folded portion in which the non-skin side sheet is folded downward at an upper end portion in the up-down direction, and In the unfolded state, when viewed in the thickness direction, some of the holes provided in the portion other than the folded portion of the non-skin side sheet do not overlap with some of the holes provided in the folded portion of the non-skin side sheet.

9. The pant-shaped absorbent article according to claim 3, wherein: The exterior member has a folded portion in which the non-skin side sheet is folded downward at an upper end portion in the up-down direction, and In the developed state, when viewed in the thickness direction, some of the holes provided in the portion other than the folded portion of the non-skin side sheet overlap with some of the holes provided in the folded portion of the non-skin side sheet.

10. The pant-shaped absorbent article according to claim 3, wherein: The non-skin side sheet has higher hydrophilicity than sheet members other than the non-skin side sheet constituting the exterior member.

11. The pant-shaped absorbent article according to claim 3, wherein: In the unfolded and stretched state, the pant-shaped absorbent article has a longitudinal direction and a transverse direction that intersect each other, In the absorbent body, a plurality of absorbent elastic members that stretch in the longitudinal direction are provided at intervals in the left-right direction, and In the stretched state, a distance between two of the absorbent elastic members adjacent to each other in the transverse direction is greater than a center-to-center distance between two of the holes adjacent to each other in the transverse direction.

12. The pant-shaped absorbent article according to claim 3, wherein: In a natural state, in a region of the exterior member that overlaps with the side joint portion with respect to the up-down direction, The area of ​​the hole provided in the portion where the exterior member overlaps the absorbent body when viewed in the thickness direction is larger than the area of ​​the hole provided in the portion where the exterior member does not overlap the absorbent body when viewed in the thickness direction.

13. The pant-shaped absorbent article according to claim 3, wherein: The non-skin side panels are formed by a sheet member extending continuously from the front waist portion to the rear waist portion, and In a natural state, at the lower end portion in the up-down direction of the underwear-shaped absorbent article, the area of ​​the holes arranged in the two end portions in the left-right direction of the non-skin side piece is larger than the area of ​​the holes arranged in the central portion in the left-right direction of the non-skin side piece.

14. The pant-shaped absorbent article according to claim 3, wherein: The skin side panel does not have the holes.

15. The pant-shaped absorbent article according to claim 3, wherein: When the exterior member in the unfolded state is viewed in the thickness direction, the pull-on absorbent article has a portion where the welded portion and the hole do not overlap each other.

16. A method for manufacturing a pant-shaped absorbent article, comprising: A conveying step, wherein the first sheet and the second sheet are conveyed along a conveying direction; a hole forming step, wherein a plurality of holes are formed in the first sheet; a stretching step, wherein the second sheet is subjected to a stretching treatment so as to exhibit stretchability in the conveying direction; an exterior member forming step of forming the exterior member by superimposing and joining the first sheet and the second sheet in a thickness direction; a transfer step of transferring an absorbent body having liquid absorbency to the outer member; a folding step of folding the exterior member and the absorbent body in a direction intersecting the conveying direction; and a joining step of joining the folded outer casing members in a superimposed state in the thickness direction at a plurality of separate joining portions intermittently arranged in the intersecting direction, The area of ​​the hole formed in the hole forming step is smaller than the area of ​​one joining portion having the largest area among the plurality of individual joining portions formed in the joining step.

17. The method for producing a pants-shaped absorbent article according to claim 16, wherein: performing the stretching process by passing the second sheet between a pair of gear rollers, Each gear roller has a plurality of teeth on its circumference, and A pitch between the teeth provided on the peripheral surface of the gear roller is smaller than a center-to-center distance between two of the holes adjacent to each other in the conveying direction.

18. The method for producing a pants-shaped absorbent article according to claim 16, wherein: performing the stretching process by passing the second sheet between a pair of gear rollers, Each gear roller has a plurality of teeth on its circumference, and A pitch between the teeth provided on the peripheral surface of the gear roller is larger than a center-to-center distance between two of the holes adjacent to each other in the conveying direction.

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