Underpants-type absorbent article

Abstract

The purpose of the present disclosure is to provide an absorbent article having excellent wearability and excellent replaceability of a wearing surface.　In an absorbent article (1), an absorbent body (3) comprises a first absorbent body (5) that is non-removably joined to the absorbent article (1), and a second absorbent body (7) that is removably joined to the first absorbent body (5). The absorbent body (3) comprises an inter-body joining part (61) that removably joins the second absorbent body (7) to the first absorbent body (5), and an inter-body non-joining part (65) where the second absorbent body (7) is not joined to the first absorbent body (5). The inter-body joining part (61) is continuously disposed in a direction along the longitudinal direction (L) from a second absorbent body front end portion (27a) to a second absorbent body rear end portion (27b), and the inter-body non-joining part (65) comprises a pair of inter-body outer non-joining portions (87) disposed on both outer sides of the inter-body joining part (61) in the width direction (W).

Description

Pants-type absorbent article

[0001] The present disclosure relates to a pants-type absorbent article.

[0002] Absorbent articles including a non-removable first absorbent main body and a removable second absorbent main body are known. For example, Patent Document 1 discloses a disposable absorbent article including an absorbent main body and an additional absorbent assembly, wherein the absorbent main body is divided into a front waist region, a crotch region and a rear waist region in accordance with positions corresponding to the human body when worn, the absorbent main body includes a liquid-permeable surface layer, a liquid-impermeable bottom layer, and an absorbent core between the liquid-permeable surface layer and the liquid-impermeable bottom layer, the additional absorbent assembly is disposed on the liquid-permeable surface layer of the absorbent main body, the additional absorbent assembly includes a liquid-permeable top sheet, a liquid-impermeable bottom sheet, and an absorbent main body between the liquid-permeable top sheet and the liquid-impermeable bottom sheet, and two longitudinal end portions of the liquid-impermeable bottom sheet of the additional absorbent assembly are respectively joined to the liquid-permeable surface layer in a front main region and the rear waist region of the absorbent main body (Claim 1).

[0003] Patent Document 2 discloses a diaper having a replaceable core including an absorbent core, wherein the absorbent core includes a first absorbent core layer and a second absorbent core layer disposed on the first absorbent core layer, a width of the first absorbent core layer is smaller than a width of the second absorbent core layer, a liquid-impermeable bottom layer is disposed below the first absorbent core layer, a first liquid-permeable surface layer is adhered to an upper surface of the first absorbent core layer, an outer surface of the second absorbent core layer is covered with a second liquid-permeable surface layer, and widthwise end portions of the second absorbent core layer are repeatedly joined to the liquid-impermeable bottom layer.

[0004] China Utility Model Publication No. 206979660, China Utility Model Publication No. 207236914

[0005] Patent documents 1 and 2 do not disclose the invention relating to this disclosure. Therefore, the purpose of this disclosure is to provide an absorbent article that is highly wearable and highly replaceable on the surface of wear.

[0006] The Disclosers present an absorbent article in the form of pants, comprising an absorbent body having longitudinal, widthwise, and thicknesswise directions that are orthogonal to each other, wherein the absorbent article, in its unfolded state and in the longitudinal direction, comprises a front waist region having a front edge, a rear waist region having a rear edge, and a crotch region positioned between the front and rear waist regions, wherein the absorbent body comprises a first absorbent body positioned in the crotch region and irremovably bonded to the absorbent article, and a second absorbent body positioned on the skin side of the first absorbent body and removably bonded to the first absorbent body, wherein the absorbent body An absorbent article has been found that comprises a body-to-body joint portion in which a second absorbent body is detachably joined to a first absorbent body, and a body-to-body non-joint portion in which the second absorbent body is not joined to the first absorbent body, the second absorbent body comprises a second absorbent body front end portion which is the end near the front edge, and a second absorbent body rear end portion which is the end near the rear edge, the body-to-body joint portion is arranged continuously in the longitudinal direction from the second absorbent body front end portion to the second absorbent body rear end portion, and the body-to-body non-joint portion comprises a pair of body-to-body outer non-joint portions arranged on both outer sides of the body-to-body joint portion in the width direction.

[0007] The absorbent articles relating to this disclosure are highly wearable and offer excellent replaceability of the wear surface.

[0008] Figure 1 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 2 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 3 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 4 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 5 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 6 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 7 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 8 is a diagram illustrating the panty-type sanitary napkin 1 according to the first embodiment. Figure 9 is a diagram illustrating the panty-type sanitary napkin according to the second embodiment. Figure 10 is a diagram illustrating the panty-type sanitary napkin according to the second embodiment.

[0009] Specifically, this disclosure relates to the following aspects: [Aspect 1] An absorbent article in the form of pants, comprising an absorbent body having longitudinal, widthwise, and thicknesswise directions perpendicular to each other, wherein the absorbent article, in its unfolded state and in the longitudinal direction, comprises a front waist region having a front edge, a rear waist region having a rear edge, and a crotch region positioned between the front and rear waist regions, wherein the absorbent body comprises a first absorbent body positioned in the crotch region and irremovably joined to the absorbent article, and a second absorbent body positioned on the skin side of the first absorbent body and removably joined to the first absorbent body, wherein the absorbent body comprises a joint portion between bodies that removably joins the second absorbent body to the first absorbent body, and a non-joint portion between bodies that does not join the second absorbent body to the first absorbent body, wherein the second absorbent body comprises a front end portion of the second absorbent body which is the end closer to the front edge, and a rear end portion of the second absorbent body which is the end closer to the rear edge, The absorbent article is characterized in that the above-mentioned inter-body joint portion is continuously arranged in the longitudinal direction from the front end to the rear end of the second absorbent body, and the above-mentioned non-joint portion between bodies comprises a pair of external non-joint portions between bodies arranged on both outer sides in the width direction of the inter-body joint portion.

[0010] The absorbent article comprises a joint between main bodies that is continuously arranged along the longitudinal direction, and a pair of non-joint portions between main bodies that are located on both outer sides in the width direction of the joint between main bodies. At the pair of non-joint portions between main bodies, the second absorbent body can be separated from the absorbent article, specifically the first absorbent body. Therefore, at the pair of non-joint portions between main bodies, the second absorbent body of the absorbent article can easily fit to the wearer's body.

[0011] Furthermore, in the absorbent article described above, the joint between the main bodies is continuous in the longitudinal direction from the front end to the rear end of the second absorbent body. As a result, the force transmitted from the wearer's legs to the first absorbent body is more easily transmitted to the second absorbent body through the joint between the main bodies, and when the wearer moves their legs, the crotch area of ​​the absorbent article can easily follow the movement of the wearer's legs. Therefore, the absorbent article described above offers excellent wearability.

[0012] In the absorbent article described above, since the non-jointed outer portions between the pair of main bodies are positioned on both outer sides in the width direction of the joint portion between the main bodies, gaps, including wrinkles, tend to form between the first absorbent body and the second absorbent body. As a result, the absorbent article can prevent leakage or seepage of bodily fluids to the first absorbent body when the second absorbent body is in use.

[0013] Furthermore, the absorbent article is designed so that the wearer can easily remove the second absorbent body from the first absorbent body by grasping one of the non-jointed outer portions between the pair of bodies. Therefore, the absorbent article has excellent wear surface replaceability. In this specification, removing the second absorbent body from the first absorbent body after use is referred to as "changing the wear surface," and the ease of changing the wear surface is referred to as "wear surface replaceability." In summary, the absorbent article has excellent wearability and excellent wear surface replaceability.

[0014] [Aspect 2] The absorbent article according to aspect 1, wherein in the deployed state, the absorbent article has a widthwise center line extending parallel to the widthwise direction at the center of the longitudinal direction, and the crotch region is divided by the widthwise center line into a front crotch region near the front edge and a rear crotch region near the rear edge, and the first absorbent body has a first absorbent core, and in the deployed state, the first absorbent body elastic member extends from the front crotch region to the rear crotch region in a direction along the longitudinal direction and is disposed on the non-skin side of the first absorbent core.

[0015] Absorbent pants equipped with an absorbent body comprising a non-removable first absorbent body and a removable second absorbent body tend to slip down during wear due to the weight of the absorbent body. The above-mentioned absorbent article is less likely to slip down during wear because the first absorbent body is equipped with a predetermined elastic member of the first absorbent body.

[0016] Furthermore, since the absorbent article is equipped with a first absorbent body elastic member in the posterior groin area, the absorbent body, particularly the second absorbent body, conforms easily to the curves of the buttocks, resulting in superior wearability. Moreover, when changing the wearing surface of the absorbent article, the second absorbent body tends to lift away from the first absorbent body as the elastic member of the first absorbent body contracts, making it easier for the wearer to grasp the lifted portion of the second absorbent body that does not have bodily fluids attached and remove the second absorbent body. Therefore, the absorbent article offers both superior wearability and superior ease of changing the wearing surface.

[0017] [Aspect 3] The absorbent article described in Aspect 2, wherein the absorbent article is provided with a pair of inter-body joining portions at both ends of the second absorbent body in the width direction, and further provided with a central inter-body non-joint portion between the pair of inter-body joining portions, and in the deployed state, the absorbent article is provided with a first absorbent body elastic member such that the first absorbent body elastic member overlaps with the central inter-body non-joint portion in the thickness direction.

[0018] Since the absorbent article has a pair of joint portions between the main bodies and a central non-joint portion between the joint portions, when the absorbent article is used, an inward force is transmitted from the wearer's legs to the pair of joint portions, causing the second absorbent body to separate from the first absorbent body at the central non-joint portion and deform into a convex shape toward the skin. As a result, the portion of the second absorbent body corresponding to the central non-joint portion of the absorbent article fits more easily to the wearer's body, resulting in superior wearability. Furthermore, when changing the wearing surface of the absorbent article, the elastic member of the first absorbent body contracts, causing the second absorbent body to separate from the first absorbent body, making it easier for the second absorbent body to float away from the first absorbent body. This makes it easier to grasp the portion of the second absorbent body that does not have bodily fluids attached and remove the second absorbent body. As a result, the absorbent article has excellent wearability.

[0019] [Aspect 4] The absorbent article according to aspect 3, wherein the pair of joint portions between the main bodies comprises a pair of front edges of the joint portions between the main bodies, which are the edges near the front edge and the edges near the rear edge, and the first absorbent main body elastic member comprises a front edge of the first absorbent main body elastic member and a rear edge of the first absorbent main body elastic member, which are the edges near the front edge and the edges near the rear edge, and in the deployed state, each of the pair of front edges of the joint portions between the main bodies is positioned closer to the front edge than the front edge of the first absorbent main body elastic member.

[0020] In the absorbent article described above, each of the front edges of the joint portion between the pair of main bodies is positioned closer to the front edge than the front edge of the elastic member of the first absorbent main body. Therefore, the absorbent article is more likely to fit along the lower abdomen and crotch area, which is flatter than the buttocks area with the gluteal cleft, and offers superior wearability.

[0021] [Aspect 5] The absorbent article according to any one of aspects 1 to 4, wherein at least one of the pair of joint portions between the main bodies comprises an outer joint portion located on the outside in the width direction and an inner joint portion located on the inside in the width direction, and the outer joint portion and the inner joint portion are spaced apart in the width direction.

[0022] In the absorbent article described above, at least one of the pair of joint portions between the main bodies comprises an outer joint portion located on the outside in the width direction and an inner joint portion located on the inside in the width direction, and the outer joint portion and the inner joint portion are spaced apart in the width direction. Therefore, in the absorbent article described above, when replacing the wearing surface, at least one of the pair of joint portions between the main bodies makes it easier to remove the second absorbent body from the first absorbent body. As a result, the absorbent article has excellent wear surface replaceability.

[0023] [Aspect 6] The absorbent article according to any one of aspects 1 to 5, wherein the joint between the main bodies is configured to remain on the second absorbent body when the second absorbent body is removed from the first absorbent body.

[0024] The absorbent article described above is equipped with a predetermined inter-body joint. Therefore, when using the first absorbent body after changing the wearing surface, the possibility of the inter-body joint (e.g., adhesive) coming into contact with the wearer's body can be reduced. As a result, the absorbent article has excellent wearability. Furthermore, when the second absorbent body is rolled up with the skin-side inward for disposal after changing the wearing surface, the bonding force of the inter-body joint remaining on the non-skin side of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article has excellent disposability of the second absorbent body.

[0025] [Aspect 7] The absorbent article according to aspect 6, wherein the first absorbent body comprises a liquid-permeable first top sheet, the second absorbent body comprises a liquid-impermeable second back sheet, the joint between the bodies joins the second back sheet and the first top sheet, and the joint strength between the second back sheet and the joint between the bodies is higher than the joint strength between the first top sheet and the joint between the bodies.

[0026] The absorbent article described above has a predetermined bonding strength at the joint between the main bodies. Therefore, when using the first absorbent body after changing the wearing surface, the joint between the main bodies (e.g., adhesive) is less likely to remain on the first top sheet, resulting in a superior feel against the skin of the first top sheet of the first absorbent body. Thus, the absorbent article offers excellent wearability and excellent ease of changing the wearing surface. Furthermore, when the second absorbent body is rolled up with the skin-side facing inward for disposal after changing the wearing surface, the bonding strength of the joint between the main bodies remaining on the second back sheet of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article offers excellent ease of disposal of the second absorbent body.

[0027] [Aspect 8] The absorbent article according to aspect 7, wherein the first top sheet comprises a first skin-contact surface and a first non-skin-contact surface, and the joint between the main bodies does not reach the first non-skin-contact surface of the first top sheet.

[0028] In the absorbent article described above, the joint portion between the main bodies does not reach the first non-skin contact surface of the first top sheet. Therefore, the bonding strength between the first top sheet and the joint portion between the main bodies is suppressed, so when using the first absorbent body after changing the wearing surface, the joint portion between the main bodies is less likely to remain on the first top sheet, resulting in a superior feel against the skin of the first top sheet of the first absorbent body. As a result, the absorbent article has excellent wearability and excellent ease of changing the wearing surface. Furthermore, when the second absorbent body is rolled up with the skin side facing inward for disposal after changing the wearing surface, the bonding force of the joint portion between the main bodies remaining on the second back sheet of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article has excellent disposability of the second absorbent body.

[0029] [Aspect 9] The absorbent article according to aspect 7 or 8, wherein the first top sheet is made of a fabric, and the length of the fibers constituting the fabric is longer than the length in the width direction of the joint between the main bodies.

[0030] In the absorbent article described above, since the fibers of the fabric constituting the first top sheet are of a predetermined length, a high proportion of the fibers extend beyond both ends in the width direction of the joint between the main body parts. Therefore, in the absorbent article described above, when the wearing surface is changed, the first top sheet is less likely to tear, the fibers of the fabric constituting the first top sheet are less likely to stand up, and the surface of the first top sheet is less likely to fray. If the surface of the first top sheet becomes frayed, the wearing comfort will be inferior. As described above, the absorbent article described above has excellent wearability and excellent ease of changing the wearing surface.

[0031] [Aspect 10] The absorbent article according to any one of aspects 1 to 9, wherein the absorbent article further comprises an outer casing positioned adjacent to the non-skin side of the first absorbent body, and the first absorbent body and the outer casing are intermittently joined in the longitudinal and width directions by linear body-outer casing joints arranged with changing directions in the longitudinal and width directions.

[0032] In the absorbent article described above, the joint between the main body and the outer casing has a predetermined configuration, allowing the first absorbent body and the outer casing to easily follow the wearer's movements. Therefore, the absorbent article transmits the force caused by the wearer's movements from the outer casing through the joint between the main body and the outer casing to the first absorbent body, and then to the second absorbent body through the joint between the main body and the outer casing, thereby allowing it to follow the wearer's movements and providing excellent fit. For these reasons, the absorbent article provides excellent wearability.

[0033] [Aspect 11] The absorbent article according to aspect 10, wherein the length in the width direction of the joint between the main bodies is longer than the width of the linear joint between the main body exteriors.

[0034] In the above-mentioned absorbent article, the width of the joint between the main body parts is greater than the width of the linear joint between the main body and the outer casing. Therefore, forces generated by the wearer's movements are more easily transmitted from the second absorbent body to the first absorbent body via the joint between the main body parts, and the outer casing becomes more flexible due to the linear joint between the main body and the outer casing. As a result, the above-mentioned absorbent article offers excellent wearability.

[0035] [Aspect 12] The absorbent article according to any one of aspects 1 to 11, wherein the second absorbent body comprises a second back sheet having liquid impermeability and a second absorbent body material adjacent to the second back sheet, the second back sheet and the second absorbent body material are joined by a second absorbent body joint, and the length of the second absorbent body joint in the width direction is longer than the length of the joint between the bodies in the width direction.

[0036] In the absorbent article described above, the length in the width direction of the joint portion of the second absorbent body is longer than the length in the width direction of the joint portion between the bodies. Therefore, in the absorbent article described above, the second backsheet of the second absorbent body is less likely to tear when the wearing surface is replaced, and the absorbent article described above has excellent wear surface replaceability.

[0037] [Aspect 13] The absorbent article according to any one of aspects 1 to 12, wherein the first absorbent body comprises a liquid-permeable first top sheet and a first absorbent body material adjacent to the first top sheet, the first top sheet and the first absorbent body material are joined by a first absorbent body joint, and the length of the first absorbent body joint in the width direction is longer than the length of the joint between the bodies in the width direction.

[0038] In the absorbent article described above, the length in the width direction of the joint portion of the first absorbent body is longer than the length in the width direction of the joint portion between the bodies. Therefore, in the absorbent article described above, the first top sheet of the first absorbent body is less likely to tear when the wearing surface is replaced, and the absorbent article described above has excellent wear surface replaceability.

[0039] [Aspect 14] The absorbent article according to any one of aspects 1 to 13, wherein the length in the width direction of the non-joint portion between the main bodies is longer than the length in the width direction of the joint portion between the main bodies.

[0040] In the above absorbent article, there is a predetermined relationship between the length of the inter-body joined portion in the width direction and the length of the inter-body joined portion in the width direction. Accordingly, the absorbent article can suppress fuzzing of the first absorbent main body when the wearing surface is replaced. Also, in the above absorbent article, since there is a predetermined relationship between the length of the inter-body joined portion in the width direction and the length of the inter-body joined portion in the width direction, the rigidity of the absorbent article is less likely to increase due to the inter-body joined portion, so that the absorbent article has excellent followability to the movement of the wearer. From the above, the absorbent article is excellent not only in wearability but also in replaceability of the wearing surface.

[0041] The absorbent article according to the present disclosure will be described in detail below. FIGS. 1 to 8 are diagrams for explaining an absorbent article according to one embodiment of the present disclosure (hereinafter referred to as "first embodiment"), specifically a shorts-type sanitary napkin 1. Specifically, FIG. 1 is a perspective view of the shorts-type sanitary napkin 1. FIG. 2 is a skin-side view of the shorts-type sanitary napkin 1 in an unfolded state. FIGS. 3 and 4 are a skin-side view and a non-skin-side view, respectively, of the absorbent main body 3 in the unfolded state. FIG. 5 is a skin-side view of the first absorbent main body 5 in the unfolded state. FIGS. 6 and 7 are a skin-side view and a non-skin-side view, respectively, of the second absorbent main body 7 in the unfolded state. FIG. 8 is a partial end view taken along the VIII-VIII end face of FIG. 2.

[0042] The shorts-type sanitary napkin 1 includes a waist opening 101 and a pair of leg openings 103 (one leg opening 103a and the other leg opening 103b), and includes a pair of locking portions 105 (one locking portion 105a and the other locking portion 105b) extending from the waist opening 101 toward the pair of leg openings 103. The pair of locking portions 105 lock a front waist region 11 and a rear waist region 15 described later.

[0043] The shorts-type sanitary napkin 1 includes an absorbent main body 3 that absorbs menstrual blood, and an outer cover 9 having a shorts-type shape. In the unfolded state, the absorbent main body 3 has a rectangular shape having a longitudinal direction L and a width direction W. The absorbent main body 3 is fixed to the outer cover 9 by an inter-main body-outer cover joined portion 107 made of hot-melt adhesive.

[0044] In an unfolded state, the shorts-type napkin 1 has a longitudinal direction L and a width direction W that are orthogonal to each other, and a thickness direction T that is orthogonal to both the longitudinal direction L and the width direction W, all of which are derived from the absorbent main body 3. Note that the longitudinal direction L and the width direction W respectively refer to the longitudinal direction and the transverse direction of the absorbent main body 3, and do not refer to the longitudinal direction and the transverse direction of the shorts-type napkin 1 in the unfolded state.

[0045] In the unfolded state along the longitudinal direction L, the shorts-type napkin 1 includes a front waist region 11 having a front end edge 17, a rear waist region 15 having a rear end edge 19, and a crotch region 13 disposed between the front waist region 11 and the rear waist region 15. The front waist region 11 and the rear waist region 15 are regions provided with a pair of locking portions 105, and the crotch region 13 is a region between the front waist region 11 and the rear waist region 15 and forms leg openings 103. Note that the front end edge 17 and the rear end edge 19 respectively refer to the edge on the front waist region 11 side and the edge on the rear waist region 15 side that define the waist opening 101.

[0046] In the unfolded state, the shorts-type napkin 1 has a width direction center line WC extending parallel to the width direction W at the center of the longitudinal direction L. Further, in the unfolded state, the shorts-type napkin 1 has a longitudinal direction center line LC extending parallel to the longitudinal direction L at the center of the width direction W. The crotch region 13 is divided by the width direction center line WC into a front crotch region 13a closer to the front end edge 17 and a rear crotch region 13b closer to the rear end edge 19.

[0047] The outer cover 9 includes a first outer sheet 111 that extends from the front waist region 11 to the rear waist region 15 and is disposed on the non-skin side, and a second outer sheet 113 that extends from the front waist region 11 to the rear waist region 15 and is disposed on the skin side. Each of the first outer sheet 111 and the second outer sheet 113 is formed of a hydrophobic nonwoven fabric. The first outer sheet 111 is folded toward the skin side at the front end edge 17 and the rear end edge 19.

[0048] In the deployed state, the front waist region 11 includes a plurality of front opening elastic members 123 positioned closer to the front edge 17 and a plurality of front waist elastic members 115 positioned closer to the crotch region 13, between the first outer sheet 111 and the second outer sheet 113. The plurality of front opening elastic members 123 extend from one locking portion 105a to the other locking portion 105b and are spaced apart at a predetermined pitch in the longitudinal direction L. The plurality of front waist elastic members 115 extend from one locking portion 105a to the other locking portion 105b and are spaced apart at a front pitch of 5 mm in the longitudinal direction L. Each of the multiple front opening elastic members 123 and the multiple front body elastic members 115 is joined to the first exterior sheet 111 and the second exterior sheet 113 by an internal joint 117 made of hot melt adhesive, while in an extended state relative to the first exterior sheet 111 and the second exterior sheet 113.

[0049] In the deployed state, the rear torso region 15 includes a plurality of rear opening elastic members 125 positioned near the rear edge 19 and a plurality of rear torso elastic members 119 positioned near the crotch region 13, between the first outer sheet 111 and the second outer sheet 113. The plurality of rear opening elastic members 125 extend from one locking portion 105a to the other locking portion 105b and are spaced apart at a predetermined pitch in the longitudinal direction L. The plurality of rear torso elastic members 119 extend from one locking portion 105a to the other locking portion 105b and are spaced apart at a rearward pitch of 5 mm in the longitudinal direction L. Furthermore, in the deployed state, the rear crotch region 13b is provided with a plurality of rear leg elastic members 121 that extend from one leg opening 103a to the other leg opening 103b and are spaced apart in the longitudinal direction L, between the first outer sheet 111 and the second outer sheet 113.

[0050] Each of the multiple rear opening elastic members 125, multiple rear torso elastic members 119, and multiple rear leg elastic members 121 is joined to the first and second outer sheets 111 and 113 by an inner joint 117 made of hot melt adhesive, while extended relative to the first and second outer sheets 113. The inner joint 117 extends spirally in the longitudinal direction L across the entire area of ​​the outer body 9 (front torso region 11, crotch region 13, and rear torso region 15) and is spaced apart in the width direction W, joining the first and second outer sheets 111 and 113 intermittently in the longitudinal direction L and in the width direction W.

[0051] The absorbent body 3 comprises a first absorbent body 5 that is irremovably attached to the shorts-type napkin 1 (specifically, the outer casing 9) and is positioned from the front waist area 11 through the crotch area 13 to the rear waist area 15, and a second absorbent body 7 that is positioned on the skin side of the first absorbent body 5 and in the front crotch area 13a and the rear crotch area 13b, and is irremovably attached to the shorts-type napkin 1 (specifically, the first absorbent body 5).

[0052] The first absorbent body 5 has a first absorbent body front edge 21a, which is the edge closer to the front edge 17 of the first absorbent body 5, and a first absorbent body rear edge 21b, which is the edge closer to the rear edge 19 of the first absorbent body 5. The second absorbent body 7 has a second absorbent body front edge 23a, which is the edge closer to the front edge 17 of the second absorbent body 7, and a second absorbent body rear edge 23b, which is the edge closer to the rear edge 19 of the second absorbent body 7. In the deployed state described above, the second absorbent body front edge 23a is positioned closer to the center line WC in the width direction than the first absorbent body front edge 21a, and the second absorbent body rear edge 23b is positioned closer to the center line WC in the width direction than the first absorbent body rear edge 21b.

[0053] The first absorbent body 5 has a first absorbent body front end portion 25a, which is the end portion of the first absorbent body 5 closer to the front edge 17, and a first absorbent body rear end portion 25b, which is the end portion of the first absorbent body 5 closer to the rear edge 19. The second absorbent body 7 has a second absorbent body front end portion 27a, which is the end portion of the second absorbent body 7 closer to the front edge 17, and a second absorbent body rear end portion 27b, which is the end portion of the second absorbent body 7 closer to the rear edge 19.

[0054] In the deployed state, the front edge 21a of the first absorbent body is positioned closer to the front edge 17 than the front edge 23a of the second absorbent body. Also, in the deployed state, the rear edge 21b of the first absorbent body is positioned closer to the rear edge 19 than the rear edge 23b of the second absorbent body.

[0055] The first absorbent body 5 comprises, in the thickness direction T, a liquid-permeable first top sheet 31 having a first skin-contact surface 33a and a first non-skin-contact surface 33b, a first absorbent body 35, a pair of hydrophobic nonwoven fabric sheets 43, a first absorbent body elastic member 41, and a liquid-impermeable first back sheet 39 in that order. The first top sheet 31 is made of an air-through nonwoven fabric consisting of fibers having a predetermined fiber length. The first absorbent body 35 comprises a first absorbent core 37a and a first core wrap 37b covering the first absorbent core 37a. The first absorbent core 37a contains pulp fibers (not shown) and a superabsorbent polymer (not shown). Each of the pair of hydrophobic nonwoven fabric sheets 43 is folded over on the outside in the width direction W to make it double-layered, and extends outward in the width direction W of the first absorbent body 35.

[0056] The first absorbent core 37a and the first core wrap 37b are joined by a joint (not shown) made of hot melt adhesive. The first top sheet 31 and the first absorbent 35 (specifically, the first core wrap 37b) are joined by a joint 131 between the first top sheet and the first core wrap, which is made of hot melt adhesive. The joint 131 between the first top sheet and the first core wrap corresponds to the first absorbent body joint that joins the first absorbent body material constituting the first absorbent body 5. The joint 131 between the first top sheet and the first core wrap extends spirally in the longitudinal direction L over the entire area of ​​the first absorbent body 5 and is spaced apart in the width direction W, joining the first top sheet 31 and the first absorbent 35 (first core wrap 37b) intermittently in the longitudinal direction L and intermittently in the width direction W.

[0057] The first top sheet 31 is positioned to cover the first absorbent 35 (first absorbent core 37a and first core wrap 37b) and is bonded to each of the pair of hydrophobic nonwoven fabric sheets 43 by a first top sheet nonwoven fabric joint 133 made of hot melt adhesive. The hydrophobic nonwoven fabric sheets 43 are made of hydrophobic nonwoven fabric. The first back sheet 39 is made of a moisture-permeable film.

[0058] The first absorbent body elastic member 41 is arranged so as to overlap with the central non-joint portion 91 between the bodies in the unfolded state and in the thickness direction T. The first absorbent body elastic member 41 is composed of four thread-like elastic members. The four thread-like elastic members are arranged to extend along the longitudinal direction L from the front crotch region 13a to the rear crotch region 13b. Furthermore, the four thread-like elastic members constituting the first absorbent body elastic member 41 are spaced apart in the width direction W and arranged at a predetermined widthwise pitch. The first absorbent body elastic member 41 is joined to the first absorbent body 5 (first back sheet 39, hydrophobic nonwoven fabric sheet 43, first absorbent body 35, etc.) by an elastic member joint portion 45 made of hot melt adhesive, while the four thread-like elastic members are stretched relative to the first absorbent body 5 (first back sheet 39, hydrophobic nonwoven fabric sheet 43, first absorbent body 35, etc.). The first absorbent body elastic member 41 is a member that facilitates the contact of the absorbent body 3, that is, the first absorbent body 5 and the second absorbent body 7, with the wearer's excretory opening.

[0059] Each of the pair of hydrophobic nonwoven fabric sheets 43 is folded inward to cover the absorbent body 3 (first absorbent body 5 and second absorbent body 7), forming a leak-proof wall 47. As a result, the pair of hydrophobic nonwoven fabric sheets 43 form a pair of leak-proof walls 47 on both outer sides in the width direction W of the absorbent body 3 (first absorbent body 5 and second absorbent body 7). Each of the pair of leak-proof walls 47 has a fixed end (not shown) that is fixed to the first absorbent body 35 and the first back sheet 39, and a free end (not shown) on the opposite side. In the unfolded state, each of the pair of leak-proof walls 47 has two leak-proof elastic members 49 at the free end that extend in the longitudinal direction L from the front waist area 11, through the crotch area 13, to the rear waist area 15. Each of the two leak-proof elastic members 49 is extended relative to the leak-proof wall 47 (hydrophobic nonwoven fabric sheet 43) and joined to the hydrophobic nonwoven fabric sheet 43 within the folded hydrophobic nonwoven fabric sheet 43 by a joint (not shown) made of hot melt adhesive.

[0060] Each pair of leak-proof walls 47 is provided with a pair of front leak-proof wall joints 75 that connect the pair of leak-proof walls 47 to the first top sheet 31 in the front waist region 11. Furthermore, each pair of leak-proof walls 47 is provided with a pair of rear leak-proof wall joints 77 that connect the pair of leak-proof walls 47 to the first top sheet 31 in the rear crotch region 13b and the rear waist region 15.

[0061] The pair of leak-proof walls 47 are made of a hydrophobic nonwoven fabric that forms a hydrophobic nonwoven fabric sheet 43. They are hydrophobic and stand up from the absorbent body 3 when worn, suppressing menstrual blood leakage. The first back sheet 39 is joined to the outer body 9, particularly the second outer sheet 113, by a body-to-outer body joint 107 made of hot melt adhesive. In the unfolded state, the body-to-outer body joint 107 extends spirally in the longitudinal direction L over the region where the first back sheet 39 and the second outer sheet 113 overlap in the thickness direction T, that is, over the entire area of ​​the first back sheet 39, and is spaced apart in the width direction W, joining the first back sheet 39 and the second outer sheet 113 intermittently in the longitudinal direction L and in the width direction W.

[0062] The second absorbent body 7 comprises, in the thickness direction T, a liquid-permeable second top sheet 51 having a second skin-contact surface 53a and a second non-skin-contact surface 53b, a second absorbent 55, and a liquid-impermeable second back sheet 59 in that order. The second absorbent 55 comprises a second absorbent core 57a and a second core wrap 57b covering the second absorbent core 57a. The second absorbent core 57a contains pulp fibers (not shown) and a superabsorbent polymer (not shown).

[0063] The second absorbent core 57a and the second core wrap 57b are joined by a joint (not shown) made of hot melt adhesive. The second top sheet 51 and the second absorbent 55, specifically the second core wrap 57b, are joined by a joint 137 between the second top sheet and the second core wrap, which is made of hot melt adhesive.

[0064] The second top sheet 51 is positioned to cover the second absorbent 55 (second absorbent core 57a and second core wrap 57b), and is joined to the second back sheet 59 together with the second absorbent 55 at a joint 135 between the second top sheet and the second back sheet, which is made of hot melt adhesive. The second back sheet 59 is made of a non-permeable film. The joint 135 between the second top sheet and the second back sheet corresponds to the second absorbent body joint, which joins the second absorbent body material that constitutes the second absorbent body 7.

[0065] The second absorbent body 7 is positioned between the pair of leak-proof walls 47 of the first absorbent body 5 and the first top sheet 31, and is joined to the first top sheet 31 of the second absorbent body 7 by a pair of inter-body joints 61 made of hot melt adhesive, which are positioned on the second back sheet 59. The pair of inter-body joints 61 are composed of one inter-body joint portion 63a and the other inter-body joint portion 63b, which are arranged to extend continuously parallel to the longitudinal direction L from the front end portion 27a to the rear end portion 27b of the second absorbent body. The inter-body joint portion 63a and the other inter-body joint portion 63b are spaced apart in the width direction W and are arranged symmetrically with respect to the longitudinal center line LC.

[0066] One body-to-body joining portion 63a and the other body-to-body joining portion 63b each have an edge closer to the front edge 17, which is the front edge 64a of one body-to-body joining portion and the front edge 64b of the other body-to-body joining portion. One body-to-body joining portion 63a and the other body-to-body joining portion 63b each have an edge closer to the rear edge 19, which is the rear edge 64c of one body-to-body joining portion and the rear edge 64d of the other body-to-body joining portion.

[0067] In the region where the first absorbent body 5 and the second absorbent body 7 overlap in the thickness direction T, the portion other than the pair of inter-body joint portions 61 is an inter-body non-joint portion 65 where the first absorbent body 5 and the second absorbent body 7 are not joined. Specifically, the inter-body non-joint portion 65 comprises a pair of inter-body outer non-joint portions 87 arranged on both outer sides in the width direction W of the pair of inter-body joint portions 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b), and an inter-body central non-joint portion 91 arranged between the pair of inter-body joint portions 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b). The pair of inter-body outer non-joint portions 87 consist of one inter-body outer non-joint portion 89a arranged on the outside in the width direction W of one inter-body joint portion 63a, and the other inter-body outer non-joint portion 89b arranged on the outside in the width direction W of the other inter-body joint portion 63b.

[0068] In the panty-type sanitary napkin 1 according to the first embodiment, the second absorbent body 7 can be separated from the first absorbent body 5 at the pair of non-jointed outer portions 87 between the main bodies (one non-jointed outer portion 89a and the other non-jointed outer portion 89b). Therefore, in the panty-type sanitary napkin 1, the second absorbent body 7 can easily fit to the wearer's body at the pair of non-jointed outer portions 87 between the main bodies (one non-jointed outer portion 89a and the other non-jointed outer portion 89b). Furthermore, in the panty-type sanitary napkin 1, the pair of inter-body joints 61 (one inter-body joint 63a and the other inter-body joint 63b) are continuous parallel to the longitudinal direction L from the front end 27a of the second absorbent body to the rear end 27b of the second absorbent body. As a result, the force transmitted from the wearer to the second absorbent body 7 is more easily transmitted to the first absorbent body 5 through the pair of inter-body joints 61 (one inter-body joint 63a and the other inter-body joint 63b), and when the wearer moves their legs, the crotch area 13 of the panty-type sanitary napkin 1 can easily follow the wearer's leg movements. Therefore, the panty-type sanitary napkin 1 offers superior wearability.

[0069] In the panty-type sanitary napkin 1, a pair of non-jointed outer parts 87 between the main bodies (one non-jointed outer part 89a and the other non-jointed outer part 89b) are positioned on both outer sides in the width direction W of a pair of joint parts 61 (one joint part 63a and the other joint part 63b), making it easier for gaps, including wrinkles, to form between the first absorbent body 5 and the second absorbent body 7. As a result, the panty-type sanitary napkin 1 can prevent leakage or seepage of bodily fluids to the first absorbent body 5 when the second absorbent body 7 is in use. In addition, the panty-type sanitary napkin 1 makes it easy for the wearer to remove the second absorbent body 7 from the first absorbent body 5 by grasping one of the pair of non-jointed outer parts 87 (one non-jointed outer part 89a and the other non-jointed outer part 89b).

[0070] The first absorbent body 5 is equipped with a predetermined first absorbent body elastic member 41. This makes the panty-type napkin 1 less likely to slip down when worn. In addition, in the panty-type napkin 1, the first absorbent body elastic member 41 positioned in the rear crotch area 13b makes it easier for the absorbent body 3, in particular the second absorbent body 7, to conform to the buttocks, resulting in a superior fit for the panty-type napkin 1 while worn. Furthermore, in the panty-type napkin 1, when removing the second absorbent body 7, the contraction of the first absorbent body elastic member 41 makes it easier for the second absorbent body 7 to lift away from the first absorbent body 5, and it becomes easier to grasp the lifted portion of the second absorbent body 7 that does not have bodily fluids attached to it and remove the second absorbent body 7.

[0071] The panty-type sanitary napkin 1, in its unfolded state and in the thickness direction T, is provided with a first absorbent body elastic member 41 such that the first absorbent body elastic member 41 overlaps with the central non-joint portion 91 between the bodies. Therefore, when using the panty-type sanitary napkin 1, the second absorbent body 7 can separate from the first absorbent body 5 at the central non-joint portion 91 between the bodies and deform into a convex shape towards the skin. As a result, the portion of the second absorbent body 7 corresponding to the central non-joint portion 91 between the bodies of the panty-type sanitary napkin 1 fits more easily to the wearer's body, resulting in superior wearability. Furthermore, when changing the wearing surface of the panty-type sanitary napkin 1, the first absorbent body elastic member 41 contracts, causing the second absorbent body 7 to separate from the first absorbent body 5, making it easier for the second absorbent body 7 to float away from the first absorbent body 5. As a result, the panty-type sanitary napkin 1 offers superior ease of changing the wearing surface.

[0072] In the unfolded state, both the front edge 64a of one inter-body joining portion 63a and the front edge 64b of the other inter-body joining portion 63b are positioned closer to the front edge 17 than the front edge 67 of the first absorbent body elastic member. As a result, the shorts-type napkin 1 is more likely to fit along the lower abdomen and crotch area, which is flatter compared to the buttocks area with the gluteal cleft, and offers superior wearability.

[0073] The pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) are configured to remain on the second absorbent body 7 when the wearing surface is replaced, that is, when the second absorbent body 7 is removed from the first absorbent body 5. This reduces the possibility that the hot melt adhesive constituting the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) will come into contact with the wearer's body and cause discomfort when the first absorbent body 5 is used after the wearing surface has been replaced. Furthermore, when the second absorbent body 7 of the panty-type napkin 1 is rolled up with the second top sheet 51 facing inward in order to dispose of the second absorbent body 7 after the wearing surface has been replaced, the bonding force of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) remaining on the second back sheet 59 of the second absorbent body 7 makes it easier to maintain the rolled-up state. Therefore, the panty-type sanitary napkin 1 has excellent disposability of the second absorbent body 7.

[0074] The first absorbent body 5 and the outer casing 9 are intermittently joined in the longitudinal direction L and the width direction W by predetermined linear body-to-outer casing joints 107 made of hot melt adhesive. As a result, the shorts-type napkin 1 transmits the force from the wearer's movements from the outer casing 9 to the first absorbent body 5 via the linear body-to-outer casing joints 107, and then transmits it to the second absorbent body 7 via a pair of body-to-body joints 61 (one body-to-body joint portion 63a and the other body-to-body joint portion 63b), allowing it to follow the wearer's movements and providing excellent fit.

[0075] The length in the width direction W of each of the pair of inter-body joints 61 (one inter-body joint 63a and the other inter-body joint 63b) is longer than the width of the linear inter-body exterior joint 107. As a result, the force generated by the wearer's movement is more easily transmitted from the second absorbent body 7 to the first absorbent body 5 via the pair of inter-body joints 61, and the exterior body 9 becomes more flexible due to the linear inter-body exterior joint 107.

[0076] In the second absorbent body 7, the second backsheet 59 and the second top sheet 51 and second absorbent body 55 adjacent to the second backsheet 59 in the thickness direction T are joined by a second top sheet-second backsheet joint 135, which corresponds to the second absorbent body joining portion. The length in the width direction W of the second top sheet-second backsheet joint 135 is approximately the same as that of the second backsheet 59. Therefore, the length in the width direction W of the second top sheet-second backsheet joint 135, which corresponds to the second absorbent body joining portion, is longer than the sum of the width directions of the pair of body joints 61 (one body joint portion 63a and the other body joint portion 63b). As a result, the second backsheet 59 of the second absorbent body 7 is less likely to tear when changing the wearing surface, and the panty-type sanitary napkin 1 has excellent wear surface changeability.

[0077] In the first absorbent body 5, the first top sheet 31 and the first absorbent material 35 (specifically, the first core wrap 37b) adjacent to the first top sheet 31 in the thickness direction T are joined by a joint portion 131 between the first top sheet and the first core wrap, which corresponds to the joint portion of the first absorbent body. The length in the width direction W of the joint portion 131 between the first top sheet and the first core wrap is approximately the same as that of the first absorbent material 35. Therefore, the length in the width direction W of the joint portion 131 between the first top sheet and the first core wrap, which corresponds to the joint portion of the first absorbent body, is longer than the sum of the lengths in the width direction of the pair of joint portions 61 (one joint portion 63a and the other joint portion 63b). As a result, the first top sheet 31 of the first absorbent body 5 is less likely to tear when changing the wearing surface, and the panty-type sanitary napkin 1 has excellent ease of changing the wearing surface.

[0078] In the panty-type sanitary napkin 1, the first top sheet 31 is made of an air-through nonwoven fabric consisting of fibers having a predetermined fiber length, and the fiber length of the fibers is longer than the widthwise length of each of the pair of inter-body joining portions 61 (one inter-body joining portion 63a and the other inter-body joining portion 63b). As a result, in the panty-type sanitary napkin 1, when changing the wearing surface, the first top sheet 31 is less likely to tear, the fibers constituting the first top sheet 31 are less likely to stand up, and the surface of the first top sheet 31 is less likely to fray.

[0079] In the panty-type sanitary napkin 1, the bonding strength between the second backsheet 59 and each of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) is higher than the bonding strength between the first top sheet 31 and each of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b). As a result, when using the first absorbent body 5 after changing the wearing surface, the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) are less likely to remain on the first top sheet 31, resulting in a first top sheet 31 of the first absorbent body 5 having a superior feel against the skin. Furthermore, when the panty-type napkin 1 is rolled up with the second absorbent body 7 facing inward after changing the wearing surface, the adhesive force of the pair of inter-body joints 61 (one inter-body joint 63a and the other inter-body joint 63b) remaining on the second back sheet 59 of the second absorbent body 7 makes it easier to maintain the rolled-up state. Therefore, the panty-type napkin 1 is excellent in terms of the disposal of the second absorbent body 7.

[0080] In the panty-type sanitary napkin 1, the hot-melt adhesive that constitutes each of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) penetrates the air-through nonwoven fabric that constitutes the first top sheet 31 and does not reach the first non-skin contact surface 33b of the first top sheet 31. As a result, the bonding strength between the first top sheet 31 and each of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) is suppressed, so when changing the wearing surface, each of the pair of inter-body joints 61 (one inter-body joint portion 63a and the other inter-body joint portion 63b) is less likely to remain on the first top sheet 31, resulting in a first top sheet 31 of the first absorbent body 5 having a superior feel against the skin. Furthermore, when the panty-type napkin 1 is rolled up with the second absorbent body 7 facing inward after changing the wearing surface, the adhesive force of the pair of inter-body joints 61 (one inter-body joint 63a and the other inter-body joint 63b) remaining on the second back sheet 59 of the second absorbent body 7 makes it easier to maintain the rolled-up state. Therefore, the panty-type napkin 1 is excellent in terms of the disposal of the second absorbent body 7.

[0081] In the panty-type sanitary napkin 1, the total length in the width direction W of the pair of outer non-joint portions 87 (one outer non-joint portion 89a and the other outer non-joint portion 89b) and the central non-joint portion 91 that constitute the non-joint portion 65 between the main bodies is longer than the total length in the width direction W of the pair of joint portions 61 (one joint portion 63a and the other joint portion 63b). As a result, in the panty-type sanitary napkin 1, when changing the wearing surface, fluffing of the first absorbent body 5 can be suppressed. In addition, in the panty-type sanitary napkin 1, the rigidity of the panty-type sanitary napkin 1 is less likely to increase due to the pair of joint portions 61 (one joint portion 63a and the other joint portion 63b), and the panty-type sanitary napkin 1 has excellent conformity to the wearer's movements.

[0082] Figures 9 and 10 illustrate an absorbent article according to another embodiment of the present disclosure (hereinafter referred to as the "second embodiment"), specifically a panty-type sanitary napkin (not shown). Specifically, Figures 9 and 10 are diagrams showing the skin-side and non-skin-side of the second absorbent body 7 in its unfolded state, respectively. The appearance of the panty-type sanitary napkin according to the second embodiment is the same as that of the panty-type sanitary napkin 1 according to the first embodiment, so it is not shown. Furthermore, since the panty-type sanitary napkin according to the second embodiment is generally similar to the panty-type sanitary napkin 1 according to the first embodiment, the explanation will focus on the differences between the two.

[0083] The shorts-type sanitary napkin according to the second embodiment differs from the shorts-type sanitary napkin 1 according to the first embodiment in the shape of each of the pair of inter-body joining portions 61 (one inter-body joining portion 63a and the other inter-body joining portion 63b). Specifically, one inter-body joining portion 63a comprises one outer joining portion 93a located on the outside in the width direction W and one inner joining portion 93b located on the inside in the width direction W, with the one outer joining portion 93a and the one inner joining portion 93b spaced apart in the width direction W. The other inter-body joining portion 63b comprises another outer joining portion 95a located on the outside in the width direction W and another inner joining portion 95b located on the inside in the width direction W, with the other outer joining portion 95a and the other inner joining portion 95b spaced apart in the width direction W.

[0084] One outer joint portion 93a and one inner joint portion 93b are spaced apart in the width direction W, and the other outer joint portion 95a and the other inner joint portion 95b are also spaced apart in the width direction W. This makes it easier to remove the second absorbent body 7 from the first absorbent body 5 when replacing the wearing surface.

[0085] The absorbent article in the form of pants according to this disclosure comprises an absorbent body having longitudinal, widthwise, and thicknesswise directions that are perpendicular to each other. The absorbent article in the form of pants according to this disclosure comprises an absorbent body, and generally comprises an outer casing. The absorbent article in the form of pants may further comprise components other than the absorbent body and outer casing. The absorbent article in the form of pants comprises a waist opening and a pair of leg openings (one leg opening and the other leg opening). The absorbent article in the form of pants also comprises a pair of locking parts (one locking part and the other locking part) for locking the front waist region and the rear waist region, which will be described later. In this specification, "absorbent article in the form of pants" may be simply referred to as "absorbent article".

[0086] Examples of the above-mentioned pant-type absorbent items include panty-type sanitary napkins and pant-type disposable diapers (e.g., pant-type disposable diapers for adults and pant-type disposable diapers for children). However, pant-type absorbent items do not include so-called tape-type absorbent items that are used by fastening tape to secure the rear waist area to the front waist area.

[0087] The absorbent article described above comprises, in its unfolded state and in the longitudinal direction, a front waist region having a front edge, a rear waist region having a rear edge, and a crotch region positioned between the front and rear waist regions. In this specification, the longitudinal direction and width direction used with respect to the absorbent article refer to the longitudinal and width directions of the absorbent body, and not to the long and short directions of the absorbent article. Furthermore, in this specification, when simply referred to as the longitudinal direction, width direction and / or thickness direction, it refers to the longitudinal direction, width direction and / or thickness direction as defined with respect to the absorbent body described above. The front edge and rear edge refer to the edge on the front waist region side and the edge on the rear waist region side, respectively, that demarcate the waist opening.

[0088] In this specification, the "unfolded state" of a pant-type absorbent article means the state in which the pair of locking parts that form the boundary between the front and rear waist regions of the pant-type absorbent article are released, and the pant-type absorbent article is spread out on a flat surface until the non-stretchable material (e.g., nonwoven fabric) constituting the pant-type absorbent article is no longer wrinkled without tearing. If the pant-type absorbent article is equipped with an elastic member, the elastic member is stretched until the non-stretchable material is no longer wrinkled. In this specification, the unfolded state of a pant-type absorbent article may also be simply referred to as the "unfolded state."

[0089] The absorbent article may, in its unfolded state, have a longitudinal centerline extending parallel to the longitudinal direction at the center of the width direction. The absorbent article may also, in its unfolded state, have a width-direction centerline extending parallel to the width direction at the center of the longitudinal direction. The crotch area is divided by the width-direction centerline into a front crotch area near the front edge and a rear crotch area near the rear edge.

[0090] The absorbent body described above generally includes an absorbent core. The absorbent body generally further includes a liquid-permeable top sheet having a skin-contacting surface and a liquid-impermeable back sheet, and optionally further includes a liquid diffusion sheet placed between the top sheet and the absorbent core, a liquid diffusion sheet placed between the absorbent core and the back sheet, a sheet placed on the non-skin side of the back sheet (e.g., a nonwoven fabric sheet, e.g., a hydrophobic nonwoven fabric sheet), etc. The absorbent core and other materials described above may be referred to as the first absorbent core, etc., if they are included in the first absorbent body described later, and as the second absorbent core, etc., if they are included in the second absorbent body described later.

[0091] The liquid-permeable top sheet described above can be made of a fabric (e.g., nonwoven fabric, woven fabric, knitted fabric, etc.) containing a predetermined fiber length, an open film, etc. The absorbent core may or may not have a pair of constricted portions that are narrowed in the width direction. The absorbent core may be arranged in the absorbent body as an absorbent material together with a core wrap that covers the absorbent core. The liquid-impermeable back sheet may or may not be breathable. The first back sheet is preferably breathable, from the viewpoint of suppressing the feeling of stuffiness for the wearer. The second back sheet is preferably not breathable, from the viewpoint of not adversely affecting the first absorbent body when the second absorbent body is in use.

[0092] In the pant-type absorbent article relating to this disclosure, the absorbent body comprises a first absorbent body positioned in the crotch area and irremovably attached to the absorbent article, and a second absorbent body positioned on the skin side of the first absorbent body and irremovably attached to the first absorbent body. In this specification, "irremovable" means that it is not intended to be removed within the normal range of use, and "irremovably attached" means that it is attached in such a way that it cannot be removed within the normal range of use. In this specification, "removable" means that it is intended to be removed within the normal range of use, and "removably attached" means that it is attached in such a way that it can be removed within the normal range of use.

[0093] Preferably, the second absorbent body, once removed from the first absorbent body, cannot be reattached to the first absorbent body. This prevents discomfort related to wearing the garment, leakage of bodily fluids, etc., from occurring due to the second absorbent body being reattached to a different location than its original position. Examples of materials that cannot be reattached to the first absorbent body include the second absorbent body having no ability to reattach to the first absorbent body after being removed from it, and the second absorbent body having the ability to reattach to the first absorbent body, but this reattachment ability is lower than the initial adhesion force of the second absorbent article to the first absorbent body.

[0094] The above-mentioned removable joint and non-removable joint can be achieved by adjusting the joint strength between the second absorbent body and the first absorbent body, and the joint strength between the first absorbent body and the absorbent article (e.g., the outer casing). For example, (i) making the joint area between the second absorbent body and the first absorbent body smaller than the joint area between the first absorbent body and the absorbent article (e.g., the outer casing), (ii) making the joint strength per unit area between the second absorbent body and the first absorbent body smaller than the joint strength per unit area between the first absorbent body and the absorbent article (e.g., the outer casing), and (iii) combinations thereof.

[0095] In the deployed state, the first absorbent body is positioned in the crotch area, preferably in the front crotch area and the rear crotch area. In the deployed state, the first absorbent body preferably extends to at least one or both of the front torso area and the rear torso area in order to improve absorbency. In the deployed state, the second absorbent body is positioned in the crotch area, preferably in the front crotch area and the rear crotch area. In the deployed state, the second absorbent body may extend to at least one or both of the front torso area and the rear torso area in order to improve absorbency.

[0096] The first absorbing core provided in the first absorbing body preferably has a density of 50 g / m². 2 More preferably 100 g / m 2 The above, and preferably 400 g / m² 2 More preferably, 200 g / m 2 The following basis weights are provided. The second absorbent core provided in the second absorbent body is preferably 50 g / m². 2 More preferably 100 g / m 2 The above, and preferably 400 g / m² 2 More preferably, 200 g / m 2 It has the following basis weight.

[0097] The first absorbent body may have a first absorbent body front edge, which is the edge of the first absorbent body closer to the front edge, and the first absorbent body may have a first absorbent body rear edge, which is the edge of the first absorbent body closer to the rear edge. The second absorbent body may have a second absorbent body front edge, which is the edge of the second absorbent body closer to the front edge, and the second absorbent body may have a second absorbent body rear edge, which is the edge of the second absorbent body closer to the rear edge.

[0098] The first absorbent body may include a first absorbent body front end, which is the end of the first absorbent body near the front edge, and the first absorbent body may include a first absorbent body rear end, which is the end of the first absorbent body near the rear edge. The first absorbent body front end refers to a region extending from the edge of the first absorbent body near the front edge to preferably within 30%, more preferably within 20%, and even more preferably within 10% of the longitudinal length of the first absorbent body. The first absorbent body rear end refers to a region extending from the edge of the first absorbent body near the rear edge to preferably within 30%, more preferably within 20%, and even more preferably within 10% of the longitudinal length of the first absorbent body.

[0099] The second absorbent body may include a front end portion of the second absorbent body, which is the end portion of the second absorbent body closer to the front edge, and the second absorbent body may include a rear end portion of the second absorbent body, which is the end portion of the second absorbent body closer to the rear edge. The front end portion of the second absorbent body refers to a region extending from the edge of the second absorbent body closer to the front edge, preferably within 30%, more preferably within 20%, and even more preferably within 10%, of the longitudinal length of the second absorbent body. The rear end portion of the second absorbent body refers to a region extending from the edge of the second absorbent body closer to the rear edge, preferably within 30%, more preferably within 20%, and even more preferably within 10%, of the longitudinal length of the second absorbent body.

[0100] In the pant-type absorbent article according to this disclosure, the absorbent body comprises an inter-body joint portion in which the second absorbent body is detachably joined to the first absorbent body, and an inter-body non-joint portion in which the second absorbent body is not joined to the first absorbent body. The inter-body joint portion is continuously arranged in the longitudinal direction from the front end to the rear end of the second absorbent body. The inter-body non-joint portion comprises a pair of inter-body outer non-joint portions arranged on both outer sides of the inter-body joint portion in the width direction.

[0101] At the non-jointed outer portion between the pair of main bodies, the second absorbent body can be separated from the absorbent article, specifically the first absorbent body. Therefore, at the non-jointed outer portion between the pair of main bodies, the second absorbent body of the absorbent article can easily fit to the wearer's body. Furthermore, in the absorbent article, since the joint between the main bodies is continuous in the longitudinal direction from the front end to the rear end of the second absorbent body, the force transmitted from the wearer to the second absorbent body is easily transmitted to the first absorbent body through the joint between the main bodies, and when the wearer moves their legs, the crotch area of ​​the absorbent article can easily follow the movement of the wearer's legs. For these reasons, the absorbent article has excellent wearability.

[0102] In the absorbent article described above, since the non-joint portions on the outer sides between the pair of main bodies are positioned on both outer sides in the width direction of the joint portion between the main bodies, gaps, including wrinkles, tend to form between the first absorbent body and the second absorbent body. As a result, the absorbent article can prevent leakage or seepage of bodily fluids to the first absorbent body when the second absorbent body is in use. Furthermore, the absorbent article makes it easy for the wearer to remove the second absorbent body from the first absorbent body when changing the wearing surface by grasping one of the non-joint portions on the outer sides between the pair of main bodies. Therefore, the absorbent article has excellent interchangeability of the wearing surface.

[0103] From the above viewpoint, it is preferable that the outer non-joint portion between the pair of main bodies be positioned in an area that extends from both ends of the second absorbent body in the width direction to a region that is preferably 30% or less, more preferably 25% or less, even more preferably 20% or less, even more preferably 10% or less, and even more preferably 5% or less of the length of the second absorbent body in the width direction.

[0104] In this specification, the direction along the longitudinal direction means that it is within ±45° of the longitudinal direction. The direction along the longitudinal direction is preferably within ±30°, more preferably within ±20°, even more preferably within ±10°, even more preferably within ±5°, and even more preferably parallel to the longitudinal direction. In this specification, "inside" and "outside" with respect to the width direction mean the side closer to the longitudinal centerline and the side further from the longitudinal centerline, respectively.

[0105] The joint between the main bodies is preferably coated linearly in the direction along the longitudinal direction. The joint between the main bodies can be, for example, a joint bonded with an adhesive (for example, a hot melt adhesive).

[0106] The absorbent article described above has a pair of body-to-body joining portions at both ends of the second absorbent body in the width direction, and may or may not have a further body-to-body central non-joint portion between the pair of body-to-body joining portions, also serving as a body-to-body joining portion. It is preferable that the absorbent article has the body-to-body central non-joint portion. As a result, for example, when wearing the absorbent article, the width direction center of the front end of the second absorbent body forms a convex shape as the elastic member around the front waist, which will be described later, and the wearer can easily adjust the position of the second absorbent body by grasping the convex portion with their hand, resulting in an absorbent article with excellent fit and wearability. Furthermore, when changing the wearing surface, since the width direction center of the front end of the second absorbent body forms a convex shape, the wearer can easily remove the second absorbent body by grasping the convex portion with their hand, resulting in excellent wear surface interchangeability. The pair of joint portions between the main bodies described above may comprise a pair of front edges of the joint portion between the main bodies, which are the edges near the front edge and the edges near the rear edge, and a pair of rear edges of the joint portion between the main bodies.

[0107] At least one of the pair of joint portions between the main bodies described above comprises an outer joint portion located on the outside in the width direction and an inner joint portion located on the inside in the width direction, and the outer joint portion and the inner joint portion can be spaced apart in the width direction. As a result, when replacing the wearing surface of the absorbent article, at least one of the pair of joint portions between the main bodies makes it easier to remove the second absorbent body from the first absorbent body. Consequently, the absorbent article has excellent wear surface replaceability.

[0108] In this specification, the above-mentioned ends in the width direction of the second absorbent body mean, in the unfolded state, the region extending from both ends of the second absorbent body in the width direction, preferably 35% or less, more preferably 30% or less, even more preferably 25% or less, and even more preferably 20% or less, of the length of the second absorbent body in the width direction.

[0109] In the pant-type absorbent article according to this disclosure, the first absorbent body may include a first absorbent body elastic member that extends from the front crotch region to the rear crotch region in a direction along the longitudinal direction. The first absorbent body elastic member may include a first absorbent body elastic member front edge, which is the edge closer to the front edge. The first absorbent body elastic member may also include a first absorbent body elastic member rear edge, which is the edge closer to the rear edge.

[0110] In the above absorbent article, the first absorbent body is equipped with a predetermined first absorbent body elastic member, making it less likely to slip down when worn. Furthermore, in the above absorbent article, the first absorbent body elastic member is provided in the rear crotch area, allowing the absorbent body, particularly the second absorbent body, to conform more easily to the buttocks, resulting in superior wearability for the panty-type sanitary napkin 1. Moreover, in the above absorbent article, when changing the wearing surface, the second absorbent body tends to lift away from the first absorbent body due to the contraction of the first absorbent body elastic member, making it easier to grasp the lifted portion of the second absorbent body that does not have bodily fluids attached and remove the second absorbent body.

[0111] The first absorbent body elastic member described above can be composed of one or more linear elastic members (e.g., filamentous elastic members), or it can be composed of a planar elastic member (e.g., a stretchable nonwoven fabric). When the first absorbent body elastic member is composed of multiple linear elastic members, the multiple linear elastic members may have the same or different lengths in the longitudinal direction. Furthermore, the multiple linear elastic members may be arranged at the same widthwise pitch, or at different widthwise pitches.

[0112] Examples of the position of the elastic member of the first absorbent body in the thickness direction include the space between the first absorbent core and the first core wrap, the space between the first core wrap and the first back sheet, the space between the first back sheet and the sheet constituting the first absorbent body disposed on its non-skin side (e.g., a nonwoven fabric sheet, e.g., a hydrophobic nonwoven fabric sheet), the space between the first absorbent body and the outer sheet, and the space between the two sheets constituting the outer sheet (e.g., a nonwoven fabric sheet, e.g., a hydrophobic nonwoven fabric sheet). From the viewpoint of preventing slippage during wear, it is preferable that the elastic member of the first absorbent body be positioned on the non-skin side of the first absorbent core in the thickness direction.

[0113] The first absorbent body elastic member can be joined to an adjacent sheet in the thickness direction with a stretch ratio of preferably 1.1 times or more, more preferably 1.5 times or more, and even more preferably 2.0 times or more, from the viewpoint of facilitating contact between the absorbent body and the wearer's excretory opening. Furthermore, from the above viewpoint, the first absorbent body elastic member can be joined to an adjacent sheet in the thickness direction with a stretch ratio of preferably 3.5 times or less, more preferably 3.2 times or less, and even more preferably 3.0 times or less. The first absorbent body elastic member may also be directly joined to an adjacent sheet in the thickness direction, for example, by a hot-melt adhesive. Furthermore, if the first absorbent body elastic member is composed of one or more linear elastic members (for example, filamentous elastic members), the first absorbent body elastic member may be indirectly joined to adjacent sheets in the thickness direction by being sandwiched by a group of joints including a pair of joints (for example, a joint bonded with hot melt adhesive, a fused joint, etc.) that join two sheets adjacent to each other in the thickness direction of the first absorbent body elastic member.

[0114] The second absorbent body may or may not have an elastic member that extends along the longitudinal direction and is disposed in the crotch area, but it is preferable that it does not have such a member. This makes it less likely for the second absorbent body to contract differently from the first absorbent body in the longitudinal direction, resulting in superior fit of the absorbent article while worn. Furthermore, if the second absorbent body is located in the front and / or rear torso area, for the same reasons, it is preferable that the second absorbent body in that area does not have an elastic member that extends along the longitudinal direction and is disposed in that area.

[0115] In the above-mentioned absorbent article, in the deployed state, the first absorbent body elastic member may be provided such that, in the thickness direction, the first absorbent body elastic member overlaps with the central non-joint portion between the bodies. As a result, when using the absorbent article, the second absorbent body can separate from the first absorbent body at the central non-joint portion between the bodies and deform into a convex shape toward the skin. As a result, the portion of the second absorbent body corresponding to the central non-joint portion between the bodies fits more easily to the wearer's body, resulting in superior wearability. Furthermore, when changing the wearing surface of the absorbent article, the first absorbent body elastic member contracts, causing the second absorbent body to separate from the first absorbent body, making it easier for the second absorbent body to float away from the first absorbent body. This makes it easier to grasp the portion of the second absorbent body that does not have bodily fluids attached and remove the second absorbent body. As a result, the absorbent article offers superior interchangeability of the wearing surface.

[0116] At least one of the front edges of the pair of joint portions between the main bodies may, in the deployed state, be positioned closer to the front edge than the front edge of the first absorbent main body elastic member, or closer to the rear edge, or at the same position in the longitudinal direction. Preferably, each of the front edges of the pair of joint portions between the main bodies is positioned closer to the front edge than the front edge of the first absorbent main body elastic member in the deployed state. This makes it easier for the absorbent article to fit along the lower abdomen and crotch area, which is flatter than the buttocks with a gluteal cleft, resulting in superior wearability.

[0117] The above-mentioned inter-body joint may or may not be configured to remain on the second absorbent body when the second absorbent body is removed from the first absorbent body when the wearing surface is replaced. Preferably, the above-mentioned inter-body joint is configured to remain on the second absorbent body when the second absorbent body is removed from the first absorbent body when the wearing surface is replaced. This reduces the possibility that the inter-body joint (e.g., adhesive) will come into contact with the wearer's body when the first absorbent body is used after the wearing surface has been replaced. As a result, the absorbent article has excellent wearability. Furthermore, when the second absorbent body is rolled up with the skin side inward for disposal after the wearing surface has been replaced, the bonding force of the inter-body joint remaining on the non-skin side of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article has excellent disposability of the second absorbent body.

[0118] In order to ensure that the above-mentioned joint between the main bodies remains on the second absorbent body when the second absorbent body is removed from the first absorbent body when replacing the wearing surface, for example, (i) a hot melt adhesive is applied to the second absorbent body, and then the second absorbent body and the first absorbent body are joined together to form the joint between the main bodies, and (ii) the roughness of the joining surface of the second absorbent body is made rougher than the roughness of the joining surface of the first absorbent body, and the hot melt adhesive is applied while the fluidity of the hot melt adhesive is high. (iii) Forming a joint between bodies by applying hot melt adhesive to the first absorbent body or the second absorbent body (preferably the second absorbent body), with the roughness of the joint surface of the first absorbent body being rougher than the roughness of the joint surface of the second absorbent body, and with the fluidity of the hot melt adhesive being low, by applying hot melt adhesive to the first absorbent body or the second absorbent body (preferably the second absorbent body), and (iv) any combination thereof.

[0119] The degree to which the second absorbent body remains at the joint between the two bodies can be measured as follows: (1) Place multiple absorbent articles in a constant temperature and humidity chamber at a temperature of 25°C ± 5°C and relative humidity of 65 ± 5% RH for 24 hours. (2) Cut the absorbent article parallel to the width direction at the point where the first absorbent body and the second absorbent body overlap at the front of the absorbent article. Attach adhesive tape to the front end of the first absorbent body in the longitudinal direction and to the front end of the second absorbent body in the longitudinal direction, respectively, to form gripping parts on the first and second absorbent bodies. (3) Set the gripping parts of the first absorbent body and the gripping parts of the second absorbent body in a jig of Instron Japan's 5900 series universal material tester with a chuck distance of 20 mm. (4) Perform a T-type peel test on the sample at 25°C and a speed of 100 mm / min. (5) Visually evaluate the joint between the first and second absorbent bodies remaining after the T-type peel test. If the joint between the bodies is difficult to see, a colored powder, such as activated carbon, may be sprinkled on the first and second absorbent bodies.

[0120] When the above-mentioned joint between the main bodies connects the second backsheet and the first topsheet, the bonding strength between the second backsheet and the above-mentioned joint between the main bodies may be higher, lower, or the same as the bonding strength between the first topsheet and the above-mentioned joint between the main bodies. Preferably, the bonding strength between the second backsheet and the above-mentioned joint between the main bodies is higher than the bonding strength between the first topsheet and the above-mentioned joint between the main bodies. As a result, in the absorbent article, when using the first absorbent body after changing the wearing surface, the joint between the main bodies is less likely to remain on the first topsheet, and the first topsheet of the first absorbent body has a superior feel against the skin. Thus, the absorbent article has excellent wearability and excellent interchangeability of the wearing surface. Furthermore, when the second absorbent body is rolled up with the skin side facing inward in order to dispose of it after changing the wearing surface, the bonding force of the joint between the main bodies remaining on the second backsheet of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article has excellent disposability of the second absorbent body.

[0121] To make the bonding strength between the second backsheet and the main body joint higher than the bonding strength between the first topsheet and the main body joint, for example, (i) applying a hot melt adhesive to the second backsheet and then bonding the second backsheet to the first topsheet, (ii) making the roughness of the second backsheet rougher than that of the first topsheet, or a combination thereof, are possible.

[0122] The above-mentioned inter-body joint may or may not reach the first non-skin contact surface of the first top sheet. Preferably, the inter-body joint does not reach the first non-skin contact surface of the first top sheet. This suppresses the bonding strength between the first top sheet and the inter-body joint, so when using the first absorbent body after changing the wearing surface, the inter-body joint is less likely to remain on the first top sheet, resulting in a superior feel against the skin of the first top sheet of the first absorbent body. Thus, the absorbent article offers excellent wearability and excellent interchangeability of the wearing surface. Furthermore, when the second absorbent body is rolled up with the skin-side facing inward for disposal after changing the wearing surface, the bonding force of the inter-body joint remaining on the second back sheet of the second absorbent body makes it easier to maintain the rolled-up state. Therefore, the absorbent article offers excellent disposability of the second absorbent body.

[0123] When the first top sheet is made of fabric, it is preferable that the length of the fibers constituting the fabric is longer than the length in the width direction of the joint between the main bodies. When the first top sheet is made of fabric, the length of the fibers constituting the fabric is preferably 2.0 times or more, more preferably 3.0 times or more, even more preferably 4.0 times or more, and even more preferably 5.0 times or more, compared to the length in the width direction of the joint between the main bodies. Also, when the first top sheet is made of fabric, the length of the fibers constituting the fabric is preferably 40.0 times or less, more preferably 35.0 times or less, and even more preferably 30.0 times or less, compared to the length in the width direction of the joint between the main bodies. As a result, the proportion of the fibers that extend beyond both ends in the width direction of the joint between the main bodies increases, making the first top sheet less likely to tear when the wearing surface of the absorbent article is changed, and the fibers of the fabric constituting the first top sheet are less likely to stand up, making the surface of the first top sheet less likely to fray. Furthermore, if the surface of the first top sheet becomes fuzzy, the wearing comfort will deteriorate. Therefore, the above absorbent material offers excellent wearability and excellent replaceability of the wearing surface.

[0124] If the absorbent article relating to this disclosure further comprises an outer casing positioned adjacent to the non-skin side of the first absorbent body, the first absorbent body and the outer casing can be joined by a method known in the art. Preferably, the first absorbent body and the outer casing are joined intermittently in the longitudinal and width directions. This allows the absorbent article to follow the wearer's movements and provide excellent fit by transmitting the force from the wearer's movements from the outer casing to the first absorbent body via the joint between the body and the outer casing, and then to the second absorbent body via the joint between the body parts. Therefore, the absorbent article provides excellent wearability.

[0125] In order to intermittently join the first absorbent body and the outer casing in the longitudinal and width directions, it is preferable to join the first absorbent body and the outer casing by linear body-to-outer casing joints that are intermittently arranged with varying directions in the longitudinal and width directions. The body-to-outer casing joints are preferably made of hot melt adhesive. The body-to-outer casing joints can be formed, for example, by applying hot melt adhesive to the first absorbent body and / or outer casing so that it extends in the longitudinal (or width direction) in a predetermined shape (e.g., spiral, omega, or stripe shape) and is spaced apart to a predetermined degree in the width direction (or longitudinal direction).

[0126] Preferably, the length of the joint between the main bodies described above in the width direction is longer than the width of the linear joint between the main body and the outer casing. This makes it easier to transmit the force generated by the wearer's movement from the second absorbent body to the first absorbent body via the joint between the main bodies, and the outer casing becomes more flexible due to the linear joint between the main body and the outer casing. As a result, the absorbent article has excellent wearability. Note that the width of the linear joint between the main body and the outer casing refers to the width of the linear portion, and does not refer to, for example, the width of the predetermined shape described above.

[0127] In the second absorbent body, the second backsheet and the second absorbent body material adjacent to the second backsheet (e.g., second topsheet, second absorbent, etc.) may be joined by a second absorbent body joint. The second absorbent body joint can be formed, for example, by applying a hot melt adhesive to the second backsheet and / or the second absorbent body material so as to extend in the longitudinal direction (or width direction) in a predetermined shape (e.g., spiral, omega, stripe), and spaced apart to a predetermined degree in the width direction (or longitudinal direction).

[0128] In that case, it is preferable that the length in the width direction of the second absorbent body joint is longer than the length in the width direction of the joint between the bodies. This makes it less likely for the second backsheet of the second absorbent body to tear when the wearing surface of the absorbent article is replaced, and the absorbent article has excellent wear surface replaceability. When the second absorbent body joint is arranged in the predetermined shape, the length in the width direction of the second absorbent body joint means the length in the width direction of the area occupied by the predetermined shape.

[0129] In the first absorbent body, the first top sheet and the first absorbent body material adjacent to the first top sheet (e.g., the first absorbent, the first back sheet, etc.) may be joined by a first absorbent body joint. The first absorbent body joint can be formed, for example, by applying a hot melt adhesive to the first top sheet and / or the first absorbent body material so as to extend in the longitudinal direction (or width direction) in a predetermined shape (e.g., spiral, omega, stripe), and spaced apart to a predetermined degree in the width direction (or longitudinal direction).

[0130] In that case, it is preferable that the length in the width direction of the first absorbent body joint is longer than the length in the width direction of the joint between the bodies. This makes it less likely for the first top sheet of the second absorbent body to tear when the wearing surface of the absorbent article is replaced, and the absorbent article has excellent wear surface replaceability. When the first absorbent body joint is arranged in the predetermined shape, the length in the width direction of the second absorbent body joint means the length in the width direction of the area occupied by the predetermined shape.

[0131] The length in the width direction of the non-joint portion between the main bodies is preferably longer than the length in the width direction of the joint portion between the main bodies. The length in the width direction of the non-joint portion between the main bodies is preferably 2.0 times or more, more preferably 3.0 times or more, even more preferably 4.0 times or more, preferably 10.0 times or less, more preferably 8.0 times or less, and even more preferably 7.0 times or less than the length in the width direction of the joint portion between the main bodies. As a result, the absorbent article can suppress fraying of the first absorbent body when the wearing surface is changed. Furthermore, in the absorbent article, since there is a predetermined relationship between the length in the width direction of the joint portion between the main bodies and the length in the width direction of the joint portion between the main bodies, the rigidity of the absorbent article is less likely to increase due to the joint portion between the main bodies, and the absorbent article has excellent ability to follow the wearer's movements.

[0132] The absorbent article may or may not include a plurality of front-waist elastic members that extend in the width direction and are arranged in the longitudinal direction within the front waist region. The plurality of front-waist elastic members may extend in the width direction within the front waist region and be arranged at a predetermined front pitch in the longitudinal direction. The predetermined pitch is preferably 3 mm or more, more preferably 4 mm or more, even more preferably 5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less.

[0133] In the deployed state, the absorbent article may include a plurality of front-waist elastic members that extend in the width direction in the region where the front waist region and the first absorbent body overlap in the width direction, and are arranged in the longitudinal direction at a front pitch of 3 mm or more, preferably 4 mm or more, more preferably 5 mm or more, preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less.

[0134] When wearing absorbent pants, it is common practice to pull up the front of the absorbent garment by grasping the front gripping portion located on the outside in the width direction of the front end in the longitudinal direction of the first absorbent body. At that time, the wearer often aligns the absorbent body with the anus by sight and touch. In the above absorbent garment, since the absorbent body comprises a first absorbent body and a second absorbent body, the second absorbent body, which should be in contact with the anus, is difficult to perceive from the appearance of the absorbent garment, making it difficult to align the second absorbent body.

[0135] Therefore, because the absorbent article is equipped with a plurality of front waist elastic members arranged at a predetermined front pitch in the front gripping portion, the wearer can easily align the second absorbent body based on the front pitch of the plurality of front waist elastic members and the distance between the front gripping portion and the second absorbent body. In addition, in the absorbent article, when replacing the wearing surface, both the second absorbent body and the first absorbent body contract in the width direction due to the plurality of front waist elastic members, making it easier to remove the front side of the second absorbent body.

[0136] The 20 mm above takes into account the length of the distal phalanx of a woman's thumb, the 15 mm above takes into account the length of the distal phalanx of a woman's index finger, and the 10 mm above takes into account the width of the distal phalanx of a woman's index finger. For example, if the front pitch is 20 mm, when a woman grasps the front gripping part with the distal phalanx of her thumb so that the distal phalanx of the thumb is perpendicular to the front body elastic member, the distal phalanx of the thumb will come into contact with at least two front body elastic members, making it easier to align the front of the absorbent article. The 3 mm above was determined from the perspective that when the wearer grasps the front gripping part with their fingers, they will feel that their fingers are in contact with at least two front body elastic members.

[0137] In this specification, the region where A and B overlap in the X direction means the region where A and B overlap in a plan view from the X direction.

[0138] Preferably, the multiple front-circumference elastic members described above extend from one locking portion to the other locking portion of a pair of locking portions in the front-circumference region. Furthermore, the multiple front-circumference elastic members can be directly joined to the material constituting the front-circumference region by a joint made of hot-melt adhesive while extended relative to the material constituting the front-circumference region. Alternatively, the front-circumference elastic members may be indirectly joined to the material constituting the front-circumference region by being sandwiched by a group of joints including a pair of joints (e.g., adhesive portions made of hot-melt adhesive, fused portions, etc.) that join two adjacent materials constituting the front-circumference region in the thickness direction of the front-circumference elastic member. Note that, in the deployed state, the multiple front-circumference elastic members may be partially or fully fractured in the area overlapping in the thickness direction with the absorbent body (e.g., the first absorbent body and / or the second absorbent body).

[0139] In the unfolded state, if the front waist region and the first absorbent body overlap in the width direction, and the product includes a plurality of front waist elastic members that extend in the width direction and are arranged at a front pitch of 3 mm or more in the longitudinal direction, it is preferable that the front edge of the first absorbent body elastic member is positioned closer to the center line in the width direction than the plurality of front waist elastic members. The absorbent article is less likely to slip down when worn due to the front waist elastic members, and because the front edge of the first absorbent body elastic member is positioned closer to the center line in the width direction than the plurality of front waist elastic members, the wearer is less likely to feel discomfort at the urinary opening.

[0140] The front edge of the second absorbent body may or may not be positioned closer to the centerline in the width direction than the plurality of front waist elastic members. Preferably, the front edge of the second absorbent body is positioned closer to the centerline in the width direction than the plurality of front waist elastic members. This makes it less likely for the front end of the second absorbent body to contract in the width direction and form wrinkles due to the influence of the contraction force of the front waist elastic members, resulting in a superior fit of the absorbent article while worn.

[0141] In the above-described unfolded state, the front edge of the first absorbent body elastic member may or may not be positioned closer to the centerline in the width direction than the front edge of the second absorbent body. Similarly, the rear edge of the first absorbent body elastic member may or may not be positioned closer to the centerline in the width direction than the rear edge of the second absorbent body.

[0142] In the unfolded state, the absorbent article comprises a plurality of front waist elastic members extending in the width direction and arranged at a predetermined front pitch in the longitudinal direction in the front waist region, and in the unfolded state, the absorbent article comprises a plurality of rear elastic members extending in the width direction and arranged at a predetermined rear pitch in the longitudinal direction in the rear waist region and / or the rear crotch region, and in the unfolded state, the front edge of the first absorbent body elastic member is positioned closer to the centerline in the width direction than the front edge of the second absorbent body, and the rear edge of the first absorbent body elastic member is positioned closer to the centerline in the width direction than the rear edge of the second absorbent body, and the distance between the front edges from the front edge of the second absorbent body to the front edge of the first absorbent body elastic member may be longer or shorter than the distance between the rear edges from the rear edge of the second absorbent body to the rear edge of the first absorbent body elastic member. It is preferable that the distance between the front edges is longer than the distance between the rear edges.

[0143] As a result, in the absorbent article, the front end of the second absorbent body is less likely to shrink in the width direction and form wrinkles due to the influence of the contraction force of the front waist elastic member, resulting in excellent fit while the absorbent article is worn. Furthermore, as a result, the rear end of the first absorbent body is more likely to fit the wearer's buttocks due to the influence of the contraction force of the rear elastic member, resulting in excellent fit while the absorbent article is worn. From the above viewpoint, it is preferable that the multiple front waist elastic members are continuous from one locking part to the other locking part. Furthermore, from the above viewpoint, it is preferable that the multiple rear elastic members are continuous from one locking part to the other locking part, and it is preferable that the multiple rear elastic members are multiple rear waist elastic members.

[0144] From the above viewpoint, the distance between the front edges is preferably 1.5 times or more, more preferably 2.0 times or more, even more preferably 2.3 times or more, and even more preferably 2.6 times or more, longer than the distance between the rear edges. Also from the above viewpoint, the distance between the front edges is preferably 5.0 times or less, more preferably 4.5 times or less, even more preferably 4.0 times or less, and even more preferably 3.5 times or less, longer than the distance between the rear edges. Note that the distance between the front edges and the distance between the rear edges refer to the length in the direction parallel to the longitudinal direction.

[0145] From the above viewpoint, the distance between the front edges is preferably 5% or more, more preferably 10% or more, and even more preferably 13% or more of the length of the second absorbent body in the longitudinal direction. Also from the above viewpoint, the distance between the front edges is preferably 35% or less, more preferably 30% or less, and even more preferably 25% or less of the length of the second absorbent body in the longitudinal direction.

[0146] In the above-described unfolded state, the distance from the front edge of the second absorbent body to the center line in the width direction may be longer or shorter than the distance from the rear edge of the second absorbent body to the center line in the width direction. Preferably, the distance from the front of the second absorbent body is longer than the distance from the rear of the second absorbent body. This makes it less likely for the front end of the second absorbent body of the absorbent article to contract in the width direction and form wrinkles due to the influence of the contraction force of the front waist elastic member, resulting in excellent fit while the absorbent article is worn. In addition, the rear end of the first absorbent body of the first absorbent body is more likely to fit the wearer's buttocks due to the influence of the contraction force of the rear elastic member (especially the multiple rear waist elastic members), resulting in excellent fit while the absorbent article is worn. From this viewpoint, it is preferable that the multiple front waist elastic members are continuous from one locking part to the other locking part. Furthermore, from the above viewpoint, it is preferable that the multiple rear elastic members are continuous from one locking portion to the other locking portion, and it is preferable that the multiple rear elastic members are multiple rear body elastic members. Note that the second absorbent body front distance and the second absorbent body rear distance refer to the length in a direction parallel to the longitudinal direction.

[0147] In the above-described unfolded state, the front edge of the second absorbent body is positioned closer to the centerline in the width direction than the front edge of the first absorbent body, and the rear edge of the second absorbent body is positioned closer to the centerline in the width direction than the rear edge of the first absorbent body. In this case, the distance between the front body parts from the front edge of the first absorbent body to the front edge of the second absorbent body may be longer or shorter than the distance between the rear body parts from the rear edge of the first absorbent body to the rear edge of the second absorbent body. It is preferable that the distance between the front body parts is shorter than the distance between the rear body parts.

[0148] As a result, in the absorbent article, the front end of the second absorbent body is less likely to contract in the width direction and form wrinkles due to the influence of the contraction force of the front waist elastic member, due to the proximity of the first absorbent body, and the absorbent article has a better fit while being worn. In addition, the rear end of the first absorbent body is more likely to fit the wearer's buttocks due to the influence of the contraction force of the rear elastic member (especially the multiple rear waist elastic members), and the absorbent article has a better fit while being worn. From this viewpoint, it is preferable that the multiple front waist elastic members are continuous from one locking part to the other locking part. Also from this viewpoint, it is preferable that the multiple rear elastic members are continuous from one locking part to the other locking part, and it is preferable that the multiple rear elastic members are multiple rear waist elastic members.

[0149] From the above viewpoint, the distance between the front bodies is preferably 0.8 times or less, more preferably 0.7 times or less, and even more preferably 0.6 times or less, compared to the distance between the rear bodies. Also from the above viewpoint, the distance between the front bodies is preferably 0.2 times or more, more preferably 0.3 times or more, and even more preferably 0.4 times or more, compared to the distance between the rear bodies.

[0150] From the above viewpoint, the distance between the rear bodies is preferably 40% or less, more preferably 30% or less, and even more preferably 25% or less, relative to the longitudinal length of the first absorbent body. Also from the above viewpoint, the distance between the rear bodies is preferably 10% or more, more preferably 14% or more, and even more preferably 17% or more, relative to the longitudinal length of the first absorbent body. Note that the distance between the front bodies and the distance between the rear bodies refer to the length in a direction parallel to the longitudinal direction.

[0151] The absorbent article according to this disclosure may, in the deployed state, comprise a plurality of rear elastic members extending in the width direction and arranged at a predetermined rear pitch in the longitudinal direction in the rear torso region and / or rear crotch region. The plurality of rear elastic members include a plurality of rear torso elastic members arranged in the rear torso region and a plurality of rear leg elastic members arranged in the rear crotch region.

[0152] Preferably, each of the above-mentioned multiple rear torso elastic members extends from one locking portion of a pair of locking portions to the other locking portion in the rear torso region. Furthermore, the above-mentioned multiple rear torso elastic members can be directly joined to the material constituting the rear torso region by a joint made of hot melt adhesive while extended relative to the material constituting the rear torso region. Alternatively, the above-mentioned rear torso elastic member may be indirectly joined to the material constituting the rear torso region by being sandwiched by a group of joints including a pair of joints (for example, a hot melt adhesive joint, a fusion joint, etc.) that join two materials constituting the rear torso region adjacent to each other in the thickness direction of the rear torso elastic member. Each of the above-mentioned multiple rear leg elastic members may extend from one leg opening to the other leg opening in the rear crotch region, and may also extend from one locking portion in the rear torso region, through the rear crotch region, to the other locking portion in the rear torso region. Furthermore, the above-mentioned multiple rear leg elastic members can be joined to the material constituting the rear crotch area by a joint made of hot melt adhesive, while in an extended state relative to the material constituting the rear crotch area.

[0153] With respect to the multiple rear elastic members described above, "extending in the width direction" means that one end of each of the multiple rear elastic members is spaced apart in the width direction. The multiple rear elastic members may be arranged parallel to the width direction, and may be curved to protrude toward the center line in the width direction.

[0154] The above-mentioned multiple rear elastic members (multiple rear body elastic members and rear leg elastic members) may be partially or entirely fractured in the area that overlaps with the absorbent body (for example, the first absorbent body and / or the second absorbent body) in the thickness direction when deployed.

[0155] The predetermined rear pitch is preferably 3 mm or more, more preferably 4 mm or more, and even more preferably 5 mm or more. Furthermore, the predetermined rear pitch is preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less. The lower limit of 3 mm and the upper limits of 20 mm, 15 mm, and 10 mm are for the same reasons as the front pitch. That is, in the absorbent article according to the present disclosure, when the rear waist region and the first absorbent body overlap in the width direction in the deployed state, i.e., the rear gripping portion, the wearer can easily align the rear of the absorbent article based on the rear pitch of the multiple rear waist elastic members and the distance between the rear gripping portion and the second absorbent body.

[0156] In the pant-type absorbent article of this disclosure, if the rear waist area extends in the width direction and is provided with a plurality of rear elastic members arranged at a predetermined rear pitch in the longitudinal direction, then in the unfolded state, the rear edge of the second absorbent body may or may not overlap with the plurality of rear elastic members in the width direction, but it is preferable that they overlap. As a result, the rear end of the second absorbent body conforms more easily to the wearer's buttocks due to the contraction of the rear elastic members while the absorbent article is being worn, and the absorbent article has excellent fit.

[0157] The pant-type absorbent article relating to this disclosure may include a front cover sheet that covers the front edge of the first absorbent body. This reduces the wearer's discomfort with the front edge of the first absorbent body and prevents leakage of bodily fluids from the front edge of the first absorbent body.

[0158] In the above-described unfolded state, if the front edge of the first absorbent body is positioned closer to the front edge of the second absorbent body than the front edge of the second absorbent body, it is preferable that the front cover sheet is positioned to cover the front edge of the first absorbent body but not the front edge of the second absorbent body. This makes it less likely for the absorbent article to tear at the front gripping portion when the front of the absorbent article is pulled up when wearing it, due to the front cover sheet covering the front edge of the first absorbent body. From this viewpoint, it is preferable that the front cover sheet covers at least a part of the front gripping portion, and more preferably that it covers the entire front gripping portion. Furthermore, while wearing the absorbent article, it is less likely for leakage to occur at the front edge of the first absorbent body due to the front cover sheet covering the front edge of the first absorbent body. Moreover, when changing the wearing surface, the removal of the second absorbent body is excellent because the front cover sheet does not cover the front edge of the second absorbent body.

[0159] The pant-type absorbent article relating to this disclosure may include a rear cover sheet that covers the rear edge of the first absorbent body. This reduces the wearer's discomfort with the rear edge of the first absorbent body and prevents leakage of bodily fluids from the rear edge of the first absorbent body.

[0160] In the above-described unfolded state, if the rear edge of the first absorbent body is positioned closer to the rear edge of the second absorbent body than the rear edge of the second absorbent body, it is preferable that the rear cover sheet is positioned to cover the rear edge of the first absorbent body but not the rear edge of the second absorbent body. This makes it less likely for the absorbent article to tear at the rear gripping portion when the rear of the absorbent article is pulled up when wearing it, due to the rear cover sheet covering the rear edge of the first absorbent body. From this viewpoint, it is preferable that the rear cover sheet covers at least a part of the rear gripping portion, and more preferably that it covers the entire rear gripping portion. Furthermore, while wearing the absorbent article, leakage is less likely to occur at the rear edge of the first absorbent body due to the rear cover sheet covering the rear edge of the first absorbent body. Moreover, when changing the wearing surface, the removal of the second absorbent body is excellent because the rear cover sheet does not cover the rear edge of the second absorbent body.

[0161] 1 Shorts-type sanitary napkin 3 Absorbent body 5 First absorbent body 7 Second absorbent body 9 Outer body 11 Front waist area 13 Crotch area 13a Front crotch area 13b Rear crotch area 15 Rear waist area 17 Front edge 19 Rear edge 21a Front edge of first absorbent body 21b Rear edge of first absorbent body 23a Front edge of second absorbent body 23b Rear edge of second absorbent body 25a Front end of first absorbent body 25b Rear end of first absorbent body 27a Front end of second absorbent body 27b Rear end of second absorbent body 41 Elastic member of first absorbent body 61 Joint between bodies 63a Joint portion of one body 63b Joint portion of the other body 65 Non-jointed portion between bodies 87 Outer non-jointed portion between bodies 89a One outer non-joint portion between two main bodies 89b The other outer non-joint portion between two main bodies 91 The central non-joint portion between two main bodies L Longitudinal direction W Width direction T Thickness direction LC Longitudinal center line WC Width direction center line

Claims

A pant-type absorbent article comprising an absorbent body having longitudinal, width, and thickness directions that are perpendicular to each other, The absorbent article, in its unfolded state and in the longitudinal direction, comprises a front torso region having a front edge, a rear torso region having a rear edge, and a crotch region positioned between the front torso region and the rear torso region. The absorbent body comprises a first absorbent body positioned in the groin area and irremovably bonded to the absorbent article, and a second absorbent body positioned on the skin side of the first absorbent body and removably bonded to the first absorbent body. The absorbent body comprises a body-to-body joint portion in which the second absorbent body is detachably joined to the first absorbent body, and a body-to-body non-joint portion in which the second absorbent body is not joined to the first absorbent body. The second absorbent body comprises a front end portion of the second absorbent body, which is the end portion near the front edge, and a rear end portion of the second absorbent body, which is the end portion near the rear edge. The joint portion between the main bodies is arranged continuously in the longitudinal direction from the front end of the second absorbent body to the rear end of the second absorbent body, The aforementioned non-joint portion between the main bodies comprises a pair of outer non-joint portions between the main bodies, which are located on both outer sides of the joint portion in the width direction. An absorbent article characterized by the following features. 　 The absorbent article, in its unfolded state, has a widthwise centerline extending parallel to the widthwise direction at the center of its longitudinal direction, and the crotch area is divided by the widthwise centerline into a front crotch area near the front edge and a rear crotch area near the rear edge. The first absorbent body comprises a first absorbent core and, in the deployed state, a first absorbent body elastic member is provided which extends in a direction along the longitudinal direction from the front crotch region to the rear crotch region and is disposed on the non-skin side of the first absorbent core. The absorbent article according to claim 1. 　 The absorbent article is provided with a pair of inter-body joining portions at both ends in the width direction of the second absorbent body, and further provided with a central inter-body non-joint portion between the pair of inter-body joining portions, In the deployed state, the absorbent article is provided with a first absorbent body elastic member such that, in the thickness direction, the first absorbent body elastic member overlaps with the central non-joint portion between the bodies. The absorbent article according to claim 2. 　 The pair of joint portions between the main bodies comprises a pair of front edges of the joint portions between the main bodies, which are the edges near the front edge and the edges near the rear edge, and a pair of rear edges of the joint portions between the main bodies. The first absorbent body elastic member comprises the front edge and rear edge of the first absorbent body elastic member, which are the edges near the front edge and the edges near the rear edge. In the deployed state, each of the front edges of the joint portion between the pair of main bodies is positioned closer to the front edge than the front edge of the first absorbent main body elastic member. The absorbent article according to claim 3. 　 The absorbent article according to any one of claims 1 to 4, wherein at least one of the pair of joint portions between the main bodies comprises an outer joint portion located on the outside in the width direction and an inner joint portion located on the inside in the width direction, and the outer joint portion and the inner joint portion are spaced apart in the width direction. 　 The absorbent article according to any one of claims 1 to 5, wherein the joint portion between the main bodies is configured to remain on the second absorbent body when the second absorbent body is removed from the first absorbent body. 　 The first absorbent body is equipped with a liquid-permeable first top sheet. The second absorbent body is equipped with a liquid-impermeable second backsheet. The aforementioned joint between the main bodies connects the second back sheet and the first top sheet. The joint strength between the second backsheet and the main body is higher than the joint strength between the first topsheet and the main body. The absorbent article according to claim 6. 　 The absorbent article according to claim 7, wherein the first top sheet comprises a first skin-contact surface and a first non-skin-contact surface, and the joint between the main bodies does not reach the first non-skin-contact surface of the first top sheet. 　 The absorbent article according to claim 7 or 8, wherein the first top sheet is made of a fabric, and the length of the fibers constituting the fabric is longer than the length in the width direction of the joint between the main bodies. 　 The absorbent article according to any one of claims 1 to 9, further comprising an outer casing positioned adjacent to the non-skin side of a first absorbent body, wherein the first absorbent body and the outer casing are intermittently joined in the longitudinal and width directions by linear body-outer casing joints arranged with their directions changing in the longitudinal and width directions. 　 The absorbent article according to claim 10, wherein the length in the width direction of the joint between the main bodies is longer than the width of the linear joint between the main body exteriors. 　 The second absorbent body comprises a second backsheet that is impermeable to liquid and a second absorbent body material adjacent to the second backsheet. The second backsheet and the second absorbent main material are joined by the second absorbent main joint. The length in the width direction of the second absorbent body joint is longer than the length in the width direction of the joint between the bodies. The absorbent article according to any one of claims 1 to 11. 　 The first absorbent body comprises a liquid-permeable first top sheet and a first absorbent body material adjacent to the first top sheet. The first top sheet and the first absorbent main material are joined by the first absorbent main joint. The length in the width direction of the first absorbent body joint is longer than the length in the width direction of the joint between the bodies. The absorbent article according to any one of claims 1 to 12. 　 The absorbent article according to any one of claims 1 to 13, wherein the length in the width direction of the non-joint portion between the main bodies is longer than the length in the width direction of the joint portion between the main bodies.

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