Absorbent panty-type items

Abstract

The present invention provides a pant-type absorbent article that prevents the absorbent main body from separating from the abdominal waist portion, and also prevents the adhesive at the dorsal joint from seeping out due to the wearer's body pressure. [Solution] A pant-type absorbent article (1) having vertical and horizontal directions, comprising a ventral waist portion (20), a dorsal waist portion (30) which is a separate member from the ventral waist portion (20), and an absorbent body (10), wherein the ventral end of the absorbent body (10) is joined to the ventral waist portion (20) at a ventral joint (60), and the dorsal end of the absorbent body (10) is joined to the dorsal waist portion (30) at a dorsal joint (70), wherein the average peel strength of the ventral joint (60) is greater than the average peel strength of the dorsal joint (70).

Description

Technical Field

[0004] , ,

[0005] ,

[0001] The present invention relates to a pant-type absorbent article.

Background Art

[0002] A so-called three-piece type pant-type absorbent article including at least three members, namely an absorbent main body, a ventral body circumferential part, and a dorsal body circumferential part which is a separate member from the ventral body circumferential part, is known. In the three-piece type pant-type absorbent article, the ventral end of the absorbent main body is joined to the ventral body circumferential part by a joint portion made of an adhesive such as a hot melt adhesive, and the dorsal end of the absorbent main body is joined to the dorsal body circumferential part.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a wearer wearing a three-piece type pant-type absorbent article lies on their side and curls up, particularly at both left and right ends in the lateral direction at the ventral end of the absorbent main body, peeling may occur at the interface with the ventral body circumferential part. In order to solve this problem, if the amount of adhesive is increased at both the ventral joint portion and the dorsal joint portion, at the dorsal joint portion, the adhesive may bleed out to the outside of the dorsal body circumferential part due to the body pressure of the wearer, and troubles such as glue residue on clothing or bedding may occur.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a pant-type absorbent article that suppresses the separation between the absorbent main body and the ventral body circumferential part and suppresses the bleeding of the adhesive at the dorsal joint portion due to the body pressure of the wearer.

Means for Solving the Problems

[0006] The main invention for achieving the above objective is a pair of pants-type absorbent articles having vertical and horizontal directions, a ventral waist portion, a dorsal waist portion which is a separate member from the ventral waist portion, and an absorbent body, wherein the ventral end of the absorbent body is joined to the ventral waist portion at a ventral joint, and the dorsal end of the absorbent body is joined to the dorsal waist portion at a dorsal joint, characterized in that the average peel strength of the ventral joint is greater than the average peel strength of the dorsal joint.

[0007] Other features of the present invention will be made clearer by description in this specification and the accompanying drawings. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a pant-type absorbent article that suppresses the separation of the absorbent main body and the abdominal waist portion, and also suppresses the leakage of adhesive at the dorsal joint due to the wearer's body pressure. [Brief explanation of the drawing]

[0009] [Figure 1] This is a front view of the pant-type absorbent item 1, seen from the ventral side. [Figure 2] This is a plan view of the pant-type absorbent item 1 in its unfolded and stretched state, as seen from the skin side. [Figure 3] Figure 3A is a schematic cross-sectional view of Figure 2 at the first centerline CL1, and Figure 3B is a schematic cross-sectional view of Figure 2 at the second centerline CC1. [Figure 4] This is an explanatory diagram illustrating the measurement area when measuring the average peel strength of the ventral joint 60 and the dorsal joint 70. [Figure 5] This is an enlarged plan view of the absorbent body 10 of the pant-type absorbent item 1 when viewed from the skin side, in an unfolded and stretched state. [Figure 6] This is an explanatory diagram illustrating the cross-section of the ventral joint 60. [Figure 7]This is an explanatory diagram illustrating the regions obtained by dividing the ventral junction 60 into three equal parts in the left-right direction, and the regions obtained by dividing the dorsal junction 70 into three equal parts in the left-right direction. [Modes for carrying out the invention]

[0010] The following matters become clear from this specification and the accompanying drawings:

[0011] (Aspect 1) A pant-type absorbent article comprising an up-and-down direction and a left-and-right direction, having a ventral waist portion, a dorsal waist portion which is a separate member from the ventral waist portion, and an absorbent body, wherein the ventral end of the absorbent body is joined to the ventral waist portion at a ventral joint, and the dorsal end of the absorbent body is joined to the dorsal waist portion at a dorsal joint, characterized in that the average peel strength of the ventral joint is greater than the average peel strength of the dorsal joint.

[0012] The absorbent pants of Embodiment 1 are a so-called three-piece type. When the wearer sleeps curled up on their side, the abdominal waistband remains in close contact with the skin, but the movement near the base of the thighs causes a force to act in a direction that separates the absorbent body from the abdominal waistband. At this time, by increasing the average peel strength of the abdominal joint where the abdominal end of the absorbent body and the abdominal waistband are joined, separation of the absorbent body and the abdominal waistband is suppressed when sleeping on one's side. At the same time, by making the average peel strength of the dorsal joint where the dorsal end of the absorbent body and the dorsal waistband are joined lower than the average peel strength of the abdominal joint, the seepage of adhesive at the dorsal joint due to the wearer's body pressure when sleeping on one's back can be suppressed. Therefore, it is possible to provide an absorbent pants that achieves both suppression of separation of the absorbent body and the abdominal waistband when sleeping on one's side and suppression of the seepage of adhesive at the dorsal joint due to the wearer's body pressure when sleeping on one's back.

[0013] (Aspect 2) The pants-type absorbent article according to Embodiment 1, wherein the maximum vertical length of the ventral joint is smaller than the maximum vertical length of the dorsal joint, and at both ends of the absorbent body in the left-right direction, the vertical length of the ventral waist portion is smaller than the vertical length of the dorsal waist portion.

[0014] In the pant-type absorbent article of Embodiment 2, by making the vertical length of the ventral waist portion at both ends of the absorbent body in the left-right direction smaller than the vertical length of the dorsal waist portion, the area covered by the ventral waist portion to the wearer's legs can be reduced, making it easier for the wearer to move their legs, and increasing the area covered by the dorsal waist portion to the wearer's buttocks. In this relationship, by making the maximum vertical length of the ventral joint smaller than the maximum vertical length of the dorsal joint, and making the average peel strength of the ventral joint greater than the average peel strength of the dorsal joint, interfacial peeling between the ventral waist portion and the absorbent body can be reduced even when the wearer moves their legs on the ventral side while lying on their side, and the effect of suppressing the seepage of adhesive due to body pressure on the wearer's back while lying on their back can be enhanced.

[0015] (Aspect 3) A pant-type absorbent article according to embodiment 1 or 2, wherein a waist-side compression region is provided on the skin side of at least one of the waist-side portion of the ventral waist portion and the dorsal waist portion, having a compression portion that is compressed in the thickness direction of the waist portion more than the surrounding portion, and an absorbent body-side compression region is provided on the non-skin side of the absorbent body, having a compression portion that is compressed in the thickness direction of the absorbent body more than the surrounding portion, and at least one of the joint portions of the ventral joint portion and the dorsal joint portion has an adhesive that joins the waist-side compression region and the absorbent body-side compression region, and the adhesive is also disposed inside the compression portion of the waist-side compression region and inside the compression portion of the absorbent body-side compression region, and is impregnated to a predetermined depth in the surrounding portion of the waist-side compression region and the surrounding portion of the absorbent body-side compression region.

[0016] According to the pant-type absorbent article of Aspect 3, a squeezing region on the waist circumference part side and a squeezing region on the absorbent body side, which each have a squeezing part that becomes a concave part on both surfaces where the waist circumference part and the absorbent body face each other, are formed. Further, the adhesive enters the concave part, and in a part where the squeezing part is not formed, the adhesive impregnates, thereby improving the anchoring property of the adhesive. Further, even when the wearer moves their feet on the ventral side in the lateral sleeping posture, interfacial peeling between the ventral waist circumference part and the absorbent body can be reduced, and the effect of suppressing bleeding of the adhesive due to body pressure on the dorsal side of the wearer in the supine sleeping posture can be made prominent.

[0017] (Aspect 4) The dorsal waist circumference part has a folded-back part that is folded back from the upper side to the lower side in the vertical direction at the upper end part, and when viewed in the thickness direction of the pant-type absorbent article, the folded-back part straddles the dorsal end of the absorbent body in the vertical direction. The pant-type absorbent article according to any one of Aspects 1 to 3.

[0018] According to the pant-type absorbent article of Aspect 4, it is possible to suppress direct rubbing between the dorsal end of the absorbent body, where a dorsal joint part having a smaller average peel strength than the ventral joint part is provided, and the body of the wearer. Therefore, interfacial peeling between the dorsal waist circumference part and the absorbent body can be reduced at the dorsal end of the absorbent body.

[0019] ]> (Aspect 5) In a state where the pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is along the vertical direction of the pant-type absorbent article, a crotch elastic member provided on the non-skin side of the absorbent core included in the absorbent body and stretching and contracting along the longitudinal direction is provided. When viewed in the thickness direction of the pant-type absorbent article, at least a part of the crotch elastic member overlaps with the dorsal joint part. The pant-type absorbent article according to any one of Aspects 1 to 4.

[0020] According to the pant-type absorbent article of Embodiment 5, the crotch elastic member compresses the absorbent body in the longitudinal direction to form bumps and dips, thereby reducing the contact area between the absorbent body and the wearer's clothing or bedding. This further suppresses the leakage of adhesive due to body pressure on the wearer's back when lying on their back.

[0021] (Aspect 6) In a state in which the pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, the pant-type absorbent article has a crotch elastic member provided on the non-skin side of the absorbent core of the absorbent body and having a portion that is expandable and contractible along the longitudinal direction together with the absorbent body, and when viewed in the thickness direction of the pant-type absorbent article, the ventral joint portion is located ventrally to the ventral end of the portion in the longitudinal direction, as described in any of embodiments 1 to 5.

[0022] According to the pant-type absorbent article of embodiment 6, by reducing the effect of stretching and contraction in the effective length of the crotch elastic member, which is an element that stretches and contracts in the longitudinal direction of the absorbent body, at the ventral joint, the amount of longitudinal elongation of the ventral waist portion and the absorbent body when a force is applied in the direction of interfacial delamination can be reduced, thereby further reducing interfacial delamination between the ventral waist portion and the absorbent body.

[0023] (Aspect 7) The back waistband portion comprises a skin-side sheet, a non-skin-side sheet provided on the non-skin side of the skin-side sheet, and a back waistband elastic member positioned between the skin-side sheet and the non-skin-side sheet and stretchable in the left-right direction, wherein the back waistband elastic member comprises a discontinuous portion that is discontinuous in the left-right direction, and a pair of continuous portions that are continuous in the left-right direction on both sides of the discontinuous portion in the left-right direction, and the skin-side sheet and the non-skin-side sheet are not joined over the range in which the discontinuous portion is located in the left-right direction, as described in any of embodiments 1 to 6.

[0024] According to the pant-type absorbent article of Embodiment 7, by making the skin-facing sheet and the non-skin-facing sheet constituting the back waist portion non-bonded in at least a part of the area where body pressure is likely to be applied, the leakage of adhesive due to body pressure on the wearer's back when lying on their back can be further suppressed.

[0025] (Pattern 8) In a state in which the pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, the absorbent body has a pair of leak-proof wall portions on both sides in the width direction, the leak-proof wall portions have a leak-proof wall elastic member having a portion that can be expanded and contracted along the longitudinal direction together with the absorbent body, and when viewed in the thickness direction of the pant-type absorbent article, the ventral joint portion is located ventrally to the portion in the longitudinal direction, as described in any of embodiments 1 to 7.

[0026] According to the pant-type absorbent article of embodiment 8, by reducing the effect of expansion and contraction in the effective length of the leak-proof wall elastic member, which is an element that expands and contracts in the longitudinal direction of the absorbent body, at the ventral joint, the amount of longitudinal elongation of the ventral waist portion and the absorbent body when a force is applied in the direction of interfacial delamination can be reduced, thereby further reducing interfacial delamination between the ventral waist portion and the absorbent body.

[0027] (Aspect 9) A pant-type absorbent article according to any one of embodiments 1 to 8, comprising a back film disposed on the non-skin side of the absorbent core of the absorbent body, and a sheet member disposed on the skin side of the back film, wherein when the pant-type absorbent article is unfolded and stretched so that the longitudinal direction of the absorbent body is along the vertical direction of the pant-type absorbent article, when viewed in the thickness direction of the absorbent body, the average peel strength between the back film and the sheet member in the region of the area where the absorbent body is disposed, on the ventral side of the absorbent core in the longitudinal direction, is smaller than the average peel strength of the ventral joint.

[0028] In the absorbent pants of embodiment 9, the wearer is less likely to feel discomfort when the interface between the abdominal waist area and the absorbent body is peeled off, making it difficult for the wearer to perceive that a problem has occurred. However, by making the average peel strength of the back film and the sheet member closer to the skin lower than the average peel strength of the abdominal joint, the part of the sheet member closer to the skin, including the absorbent body, twists and becomes uneven before the interface between the abdominal waist area and the absorbent body is peeled off. This allows the wearer to feel discomfort closer to their skin, making it easier for them to remember to change the absorbent pants.

[0029] (Aspect 10) In a state in which the absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the absorbent article and the width direction of the absorbent body is aligned with the left-right direction of the absorbent article, the absorbent body has a pair of leak-proof wall portions provided on both sides in the width direction and equipped with a leak-proof wall elastic member that is expandable and contractible along the longitudinal direction, and the leak-proof wall end fixing portions are provided to fix both ends of the leak-proof wall portion in the longitudinal direction to the skin side of the absorbent body, and the average peel strength of the leak-proof wall end fixing portion on the ventral side in the longitudinal direction is smaller than the average peel strength of the ventral side joint portion, as described in any of embodiments 1 to 9.

[0030] In the absorbent pants of embodiment 10, the wearer is less likely to feel discomfort when the interface between the ventral waist area and the absorbent body peels off, making it difficult for the wearer to perceive that a problem has occurred. However, by making the average peel strength of the leak-proof wall end fixing part lower than the average peel strength of the ventral joint, discomfort will be caused by the leak-proof wall end fixing part peeling off before the interface between the ventral waist area and the absorbent body peels off, making it easier for the wearer to remember to replace the absorbent pants.

[0031] (Aspect 11) The ventral waist portion has an elastic ventral waist member that is expandable in the left-right direction, the elastic ventral waist member has a discontinuous portion that is discontinuous in the left-right direction, and a pair of continuous portions that are continuous in the left-right direction on both sides of the discontinuous portion in the left-right direction, and when viewed in the thickness direction of the pants-type absorbent article, the inner ends of the pair of continuous portions in the left-right direction overlap with the ventral joint portion, as described in any of embodiments 1 to 10.

[0032] According to the pant-type absorbent article of embodiment 11, by increasing the average peel strength of the ventral joint, even in areas that are prone to peeling due to the expansion and contraction of the elastic member around the ventral waist, the absorbent body can be kept wide in the left-right direction. This suppresses leakage of excretory fluid from the front and reduces discomfort at the left and right ends of the absorbent body.

[0033] (Aspect 12) In a state in which the absorbent pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, the absorbent body has an absorbent core and a pair of leak-proof wall portions provided on both sides in the width direction and equipped with leak-proof wall elastic members that are expandable and contractible along the longitudinal direction of the absorbent body, and the ends of the leak-proof wall portions in the longitudinal direction are provided with leak-proof wall end fixing portions that fix the ends of the leak-proof wall portions to the skin side of the absorbent body that are outside the left-right direction of the absorbent core, and when viewed in the thickness direction of the pant-type absorbent article, at least a part of the leak-proof wall end fixing portion on the ventral side in the longitudinal direction overlaps with the ventral joint portion, as described in any of embodiments 1 to 11.

[0034] According to the pant-type absorbent article of embodiment 12, rigidity can be increased and peeling of the ventral joint can be suppressed by placing the leak-proof wall end fixing part in the absorbent body part that is thinner than the part where the absorbent core is located.

[0035] (Aspect 13) A pant-type absorbent article according to any one of embodiments 1 to 12, wherein, when the pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, when viewed in the thickness direction of the pant-type absorbent article, there is an overlapping region where the ventral waist portion and the absorbent body overlap, the value obtained by dividing the area of ​​the ventral joint by the area of ​​the overlapping region is 70% or more, and the ventral waist portion and the absorbent body are not joined at both ends of the overlapping region in the longitudinal direction and at both ends of the overlapping region in the width direction.

[0036] According to the pant-type absorbent article of embodiment 13, even when the overlapping area between the ventral waist area and the absorbent main body is narrowed, and the proportion of the overlapping area occupied by the ventral joint is increased, the leakage of adhesive from the ventral joint can be suppressed.

[0037] (Aspect 14) The absorbent body has an absorbent core, and when viewed in the thickness direction of the pant-type absorbent article, the ventral joint covers the absorbent core in the left-right direction, and both ends of the ventral joint in the left-right direction are located inward from both ends of the absorbent body in the left-right direction, as described in any of embodiments 1 to 13.

[0038] According to the pant-type absorbent article of embodiment 14, the ventral joint covers the area of ​​the absorbent body where the absorbent core, which is a highly rigid area, is located in the left-right direction, thereby further reducing delamination at the interface between the ventral waist area and the absorbent body, and suppressing the leakage of adhesive from the ventral joint.

[0039] (Aspect 15) The pant-type absorbent article according to any of embodiments 1 to 14, wherein when the ventral joint is divided into three equal regions in the left-right direction, these regions are designated as the ventral right region, the ventral central region, and the ventral left region, respectively, and when the dorsal joint is divided into three equal regions in the left-right direction, these regions are designated as the dorsal right region, the dorsal central region, and the dorsal left region, respectively, the combination of the region with the highest average peel strength among the three divided regions of the ventral joint and the region with the highest average peel strength among the three divided regions of the dorsal joint is the combination of the ventral right region and the dorsal right region, or the combination of the ventral left region and the dorsal left region.

[0040] According to the pant-type absorbent article of embodiment 15, by aligning the left-right position of the region with the greatest average peel strength among the three equally divided regions in the left-right direction of the joint, the interfacial peeling between the ventral or dorsal waist portion and the absorbent body can be further reduced even when a pulling force is applied from one side of the pant-type absorbent article in the left-right direction.

[0041] (Aspect 16) When the ventral joint is divided into three equal regions in the left-right direction, these regions are designated as the ventral right region, the ventral central region, and the ventral left region, respectively, and the dorsal joint is divided into three equal regions in the left-right direction, these regions are designated as the dorsal right region, the dorsal central region, and the dorsal left region, respectively, if the average delamination strength of the ventral right region or the average delamination strength of the ventral left region is greater than the average delamination strength of the ventral central region, A pant-type absorbent article according to any one of embodiments 1 to 15, wherein the average peel strength of the right region of the back or the average peel strength of the left region of the back is greater than the average peel strength of the central region of the back.

[0042] According to the pant-type absorbent article of embodiment 16, in the region obtained by dividing the joint into three equal parts in the left-right direction, the average peel strength of the region closer to the left and right ends of the absorbent body is greater than the average peel strength of the central region. Therefore, even when subjected to pulling force from the end of the ventral or dorsal joint, interfacial peeling between the ventral or dorsal waist portion and the absorbent body can be further reduced.

[0043] ===Implementation Method=== The following describes the pant-type absorbent article 1 according to an embodiment of the present invention. The pant-type absorbent article 1 according to this embodiment will be described as a shorts-type sanitary napkin, etc., but the pant-type absorbent article 1 may also be a pant-type disposable diaper.

[0044] <Basic composition of absorbent pant-type item 1> Figure 1 is a front view of the absorbent pant-type garment 1, seen from the ventral side. Figure 2 is a top view of the absorbent pant-type garment 1, unfolded and stretched, seen from the skin side. Figure 3A is a schematic cross-sectional view of Figure 2 at the first center line CL1, and Figure 3B is a schematic cross-sectional view of Figure 2 at the second center line CC1.

[0045] In the following explanation, the absorbent pant-type article 1 will also be simply referred to as "absorbent article 1". Furthermore, the first center line CL1 shown in Figure 2 is a line extending in the width direction (described later) at the center point that divides the product (absorbent pant-type article 1) in the longitudinal direction (described later), and the second center line CC1 is a line extending in the longitudinal direction at the center point that divides the product (absorbent pant-type article 1) in the width direction.

[0046] The unfolded state of the absorbent pant-type article 1 is the state in which the pair of side joints 2 provided on both sides of the absorbent pant-type article 1 are separated and the absorbent pant-type article 1 is opened and unfolded flat. The stretched state of the absorbent pant-type article 1 is the state in which the absorbent pant-type article 1 is stretched to the extent that the wrinkles of the absorbent pant-type article 1 are no longer visible. Specifically, this is the state in which the absorbent pant-type article 1 is stretched until the dimensions of each component that makes up the absorbent pant-type article 1 match or are close to the dimensions of the individual component.

[0047] As shown in Figure 1, the pant-type absorbent article 1 has mutually orthogonal vertical, horizontal, and front-to-back directions (directions that penetrate the paper in Figure 1), and has a waist opening BH and a pair of leg openings LH. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the wearer's crotch side. The front side in the front-to-back direction corresponds to the wearer's abdominal side, and the back side corresponds to the wearer's back side.

[0048] Furthermore, in the unfolded and extended state of the pant-type absorbent article 1 shown in Figure 2, the pant-type absorbent article 1 has longitudinal, widthwise, and thicknesswise directions (directions that penetrate the paper in Figure 2) that intersect with each other. In Figure 2, the pant-type absorbent article 1 is unfolded and extended so that the longitudinal direction of the absorbent body 10 (described later) of the pant-type absorbent article 1 is aligned with the vertical direction of the pant-type absorbent article 1, and the widthwise direction of the absorbent body 10 is aligned with the left-right direction of the pant-type absorbent article 1. Therefore, the longitudinal direction of the pant-type absorbent article 1 in the unfolded state of Figure 2 is the same direction as the vertical direction of the pant-type absorbent article 1 in the pant-type state of Figure 1. Also, the widthwise direction of the pant-type absorbent article 1 in the unfolded state of Figure 2 is the same direction as the left-right direction of the pant-type absorbent article 1 in the pant-type state of Figure 1. And, one side of the longitudinal direction corresponds to the ventral side (front side), and the other side corresponds to the dorsal side (back side). Furthermore, as shown in Figures 3A and 3B, the direction in which the materials constituting the pant-type absorbent article 1 are layered is defined as the thickness direction. In the thickness direction, the side that comes into contact with the wearer's skin is defined as the skin side, and the opposite side is defined as the non-skin side.

[0049] The absorbent pants-type article 1 is a so-called three-piece type absorbent pants-type article comprising at least three components: an absorbent body 10, an abdominal waist portion 20 that covers the wearer's abdominal side, and a back waist portion 30 that is a separate component from the abdominal waist portion 20 and covers the wearer's back. In the following description, the abdominal waist portion 20 and the back waist portion 30 will be collectively referred to as waist portions 20 and 30.

[0050] As shown in Figure 2, in the unfolded 3-piece type pants-type absorbent article 1, the ventral waist portion 20 and the dorsal waist portion 30 are positioned side by side with a gap between them in the longitudinal direction, and the absorbent body 10 is stretched between them along the longitudinal direction. As a result, a portion of the absorbent body 10 partitions the pair of leg openings LH shown in Figure 1. Furthermore, the ventral end of the absorbent body 10 in the longitudinal direction is joined and fixed to the skin side of the ventral waist portion 20 at the ventral joint 60, and the dorsal end of the absorbent body 10 in the longitudinal direction is joined and fixed to the skin side of the dorsal waist portion 30 at the dorsal joint 70. The ventral joint 60 and the dorsal joint 70 are made of an adhesive such as a hot melt adhesive, and these adhesives are applied over almost the entire area of ​​the ventral joint 60 and the dorsal joint 70 shown in Figure 2 (the area shown by the dashed line in Figure 2). In the following explanation, the ventral joint 60 and the dorsal joint 70 will be collectively referred to as joints 60 and 70.

[0051] From the unfolded state of the pant-type absorbent article 1 shown in Figure 2, the absorbent body 10 is folded in half lengthwise, and the opposing ventral waist portion 20 and dorsal waist portion 30 are connected on both sides in the width direction by a pair of side joints 2, resulting in the pant-type absorbent article 1 shown in Figure 1. In other words, the ventral waist portion 20 and the dorsal waist portion 30 are joined in an annular manner by a pair of side joints 2. Examples of joining methods using the side joints 2 include heat welding, ultrasonic welding, and adhesive joining methods.

[0052] (Absorbent body 10) As shown in Figures 3A and 3B, the absorbent body 10 includes an absorbent core 11 that absorbs and retains excretory fluids such as menstrual blood and urine, a liquid-permeable surface sheet 12 (e.g., nonwoven fabric or perforated film) positioned on the skin side of the absorbent core 11, a liquid-impermeable back film 13 (e.g., resin film) positioned on the non-skin side of the absorbent core 11, and an outer sheet 14 (e.g., hydrophobic nonwoven fabric). The outer sheet 14 is positioned on the non-skin side of the back film 13 and forms a leak-proof wall portion 3, which will be described later. The outer surface of the absorbent core 11 is covered by the skin-side sheet 15f and the non-skin-side sheet 15b.

[0053] The absorbent core 11 is a molded body formed from a predetermined liquid-absorbing material into a rectangular shape in plan view, as an example of a predetermined shape (see Figure 2). Examples of liquid-absorbing materials include water-retaining fibers and liquid-absorbing granular materials such as superabsorbent polymers (so-called SAP). The water-retaining fibers are not particularly limited as long as they have the property of absorbing and retaining moisture, and examples include cellulose fibers (e.g., pulp fibers, non-wood fibers such as cotton and hemp, regenerated fibers such as rayon, etc.). Furthermore, since the shape of the absorbent core 11 is rectangular in plan view, the length of the absorbent core 11 in the width direction is constant in at least the central region of the region divided into three equal parts in the longitudinal direction. However, the shape of the absorbent core 11 is not limited to the rectangular shape shown in Figure 2. For example, the absorbent core 11 may be roughly hourglass-shaped, with the width narrowed between the ventral (front) end and the dorsal (rear) end in the longitudinal direction.

[0054] In this embodiment, as shown in Figure 3A, an adjacent skin-side sheet 15f is provided on the skin-side of the absorbent core 11 in the thickness direction, and an adjacent non-skin-side sheet 15b is provided on the non-skin-side of the absorbent core 11 in the thickness direction. The skin-side sheet 15f is made of a sheet material such as tissue paper or a hydrophilic nonwoven fabric, and an adhesive such as a hot melt adhesive (skin-side sheet joint 15fa) is applied to almost the entire surface of the non-skin side. On the other hand, the non-skin-side sheet 15b is made of a sheet material such as a hydrophobic SB nonwoven fabric, and an adhesive such as a hot melt adhesive (non-skin-side sheet joint 15ba) is applied to almost the entire surface of the skin-side side. The absorbent core 11 is then covered by being sandwiched from both sides in the thickness direction by the skin-side sheet 15f and the non-skin-side sheet 15b, thereby stably maintaining the shape of the absorbent core 11.

[0055] Furthermore, as shown in Figures 2 and 3A, a pair of leak-proof walls 3 are provided on both sides of the absorbent body 10 in the width direction (left-right direction), along the longitudinal direction of the absorbent body 10. These pair of leak-proof walls 3 are integrally formed with the absorbent body 10 by folding the outer sheet 14 that constitutes the outer casing of the absorbent body 10. Specifically, the outer sheet 14 covers the non-skin side of the back film 13, and portions extending outward in the width direction are folded at multiple points to be provided on both sides in the width direction on the skin side of the surface sheet 12, thereby forming the leak-proof walls 3. A leak-proof elastic member 16 (e.g., elastic thread) is attached to the leak-proof walls 3 in a stretched state along the longitudinal direction. Note that in Figure 2, only the portion of the leak-proof elastic member 16 that exhibits elasticity, in other words, the portion that can stretch along the longitudinal direction together with the absorbent body 10 (absorbent core 11) (the so-called "effective length" portion) is shown. When the pant-type absorbent garment 1 is worn, the leak-proof wall portion 3 stands up on the wearer's skin side based on the elasticity of the leak-proof wall elastic member 16 in the longitudinal direction. By having these leak-proof wall portions 3 stand up on the skin side on both sides of the absorbent body 10, so-called "lateral leakage," where excretory fluid absorbed by the absorbent core 11 leaks out to the left or right, is more easily suppressed.

[0056] Furthermore, as shown in Figure 2, at both ends 46 in the longitudinal direction of the leak-proof wall section 3, leak-proof wall end fixing sections 41 and 42 are provided to fix the leak-proof wall section 3 to the skin side surface of the surface sheet 12. The leak-proof wall end fixing sections 41 and 42 are formed with an adhesive such as a hot melt adhesive, and in Figure 2, the ventral ends of both ends 46 of the leak-proof wall section 3 are fixed to the skin side surface of the surface sheet 12 via a pair of leak-proof wall end fixing sections 41. Similarly, the dorsal ends of both ends 46 of the leak-proof wall section 3 are fixed to the skin side surface of the surface sheet 12 via a pair of leak-proof wall end fixing sections 42. In addition, at the intermediate section 47, which is spaced longitudinally away from both ends 46 where the leak-proof wall end fixing sections 41 and 42 are provided, a leak-proof wall intermediate fixing section 43 is provided to fix the leak-proof wall section 3 to the skin side surface of the surface sheet 12. In Figure 2, the intermediate portion 47 of the leak-proof wall 3 in the longitudinal direction is fixed to the surface side of the surface sheet 12 via a pair of leak-proof wall intermediate fixing portions 43.

[0057] When the pant-type absorbent article 1 is worn, the portion of the leak-proof wall 3 that is not fixed to the surface sheet 12 between the ends 46 and the middle section 47 in the longitudinal direction separates from the skin side of the surface sheet 12 and stands up on the skin side, making close contact with the wearer's groin. The portion of the leak-proof wall 3 that is not fixed to the surface sheet 12 between the ends 46 and the middle section 47 in the longitudinal direction is also referred to as the "standing portion 48". The standing of the leak-proof wall 3 is suppressed more at the ends 46 where the leak-proof wall end fixing portions 41 and 42 are provided, and at the middle section 47 where the leak-proof wall middle fixing portion 43 is provided, than at the standing portion 48. That is, the maximum height of the standing portion at both ends 46 and the maximum height of the standing portion at the middle section 47 of the leak-proof wall 3 is smaller than the maximum height of the standing portion 48 of the leak-proof wall 3.

[0058] Furthermore, when the absorbent body 10 is in the extended state shown in Figure 2, the leak-proof wall end fixing parts 41, 42 and the leak-proof wall intermediate fixing part 43 are positioned outside the outermost edge of the absorbent core 11 in the width direction (left-right direction). In other words, when viewed in the thickness direction, the leak-proof wall end fixing parts 41, 42 and the leak-proof wall intermediate fixing part 43 are positioned in a region that does not overlap with the highly rigid absorbent core 11. To put it another way, the leak-proof wall end fixing parts 41, 42 and the leak-proof wall intermediate fixing part 43 are positioned in a portion of the absorbent body 10 that is thinner than the portion where the absorbent core 11 is located. As described above, when the pant-type absorbent article 1 is worn, the leak-proof wall part 3 stands up on the skin side at the upright part 48. That is, both ends in the longitudinal direction of the upright part 48 become the starting points for the uprighting of the leak-proof wall part 3. Because the leak-proof wall end fixing parts 41, 42 and the leak-proof wall intermediate fixing part 43, where the starting point for standing is located, are positioned in an area outside the absorbent core 11 and with lower rigidity, the movement of the leak-proof wall part 3 when standing up is less likely to be interfered with. As a result, when wearing the pants-type absorbent item 1, the leak-proof wall part 3 is more likely to stand up on the skin side, and it fits more easily to the wearer's groin area.

[0059] As shown in Figure 2, the absorbent body 10 has a longitudinally stretchable crotch elastic member 17 (e.g., elastic thread) in the center of the width direction (left-right direction) and on the non-skin side in the thickness direction relative to the absorbent core 11. Specifically, the crotch elastic member 17 in this embodiment is joined to the non-skin side sheet 15b, which covers the absorbent core 11 from the non-skin side, and the back film 13, which is positioned on the non-skin side in the thickness direction relative to the non-skin side relative to the non-skin side sheet 15b, via an adhesive such as a hot melt adhesive. Multiple crotch elastic members 17 (three in Figure 2) are provided at intervals in the width direction (left-right direction) when stretched along the longitudinal direction, and the elasticity of the crotch elastic member 17 exerts a force that pushes the absorbent core 11 from the non-skin side towards the skin side. This improves the fit of the absorbent body 10 (absorbent core 11) in the crotch area of ​​the wearer and makes it less likely for excretory fluids such as menstrual blood and urine to leak. In Figure 2, only the portion of each crotch elastic member 17 that exhibits elasticity, in other words, the portion that can stretch along the longitudinal direction together with the absorbent body 10 (absorbent core 11) (the so-called "effective length" portion), is shown.

[0060] (Waist circumference 20, 30) As shown in Figure 3B, the ventral torso section 20 includes a torso skin-side sheet 21, a torso non-skin-side sheet 22 (e.g., nonwoven fabric) laminated on the non-skin side of the torso skin-side sheet 21, and a plurality of ventral torso elastic members 23, 24 (e.g., elastic thread) that stretch in the left-right direction. Similarly, the dorsal torso section 30 includes a torso skin-side sheet 31, a torso non-skin-side sheet 32 ​​(e.g., nonwoven fabric) laminated on the non-skin side of the torso skin-side sheet 31, and a plurality of dorsal torso elastic members 33, 34 (e.g., elastic thread) that stretch in the left-right direction. The plurality of ventral torso elastic members 23, 24 are arranged in a vertical (longitudinal) direction between the torso skin-side sheet 21 and the torso non-skin-side sheet 22, and are attached in a stretched state in the left-right direction. Similarly, the multiple dorsal torso elastic members 33, 34 are arranged in a vertical (longitudinal) direction between the torso skin-side sheet 31 and the torso non-skin-side sheet 32, and are attached in a stretched state in the left-right direction. Due to the elasticity of the ventral torso elastic members 23, 24, the ventral torso portion 20 fits the wearer's abdominal torso, and due to the elasticity of the dorsal torso elastic members 33, 34, the dorsal torso portion 30 fits the wearer's back torso.

[0061] Furthermore, a cover sheet (not shown) may be provided to cover the upper end of the absorbent body 10 (the ventral and dorsal ends of the absorbent body 10 in the longitudinal direction of Figure 3B) from the skin side. Providing a cover sheet can prevent the upper edge of the absorbent body 10 from digging into the wearer's skin and can also prevent the absorbent body 10 from opening up.

[0062] Furthermore, as shown in the plan view of Figure 2, the planar shapes of the ventral waist portion 20 and the dorsal waist portion 30 are different when unfolded and extended. The ventral waist portion 20 has a length in the longitudinal direction (vertical direction) that is approximately the same as the side joint portion 2, and is a long rectangle in the width direction. On the other hand, the dorsal waist portion 30 has a rectangular waist side portion 30A that overlaps with the ventral waist portion 20, and further, a waist extension portion 30B located ventrally (below the side joint portion 2) from the ventral end in the longitudinal direction of the side joint portion 2, with the width in the width direction (left-right direction) narrowing from the dorsal side in the longitudinal direction to the ventral side (from the upper side to the lower side in the vertical direction). This waist extension portion 30B functions as a buttock cover that covers the wearer's buttocks on the dorsal side (rear side) when the pant-type absorbent article 1 is worn.

[0063] Here, the waist side portion 30A of the dorsal waist portion 30 has a rectangular shape that overlaps with the ventral waist portion 20, so the longitudinal length of the waist side portion 30A is approximately the same as that of the ventral waist portion 20. Since the dorsal waist portion 30 has a waist extension portion 30B in addition to the waist side portion 30A, the longitudinal length of the dorsal waist portion 30 is greater than the longitudinal length of the ventral waist portion 20 by the length of the waist extension portion 30B. Therefore, as shown in Figure 2, at least at both ends of the absorbent body 10 in the left-right direction, the vertical length 20L of the ventral waist portion 20 (length between the ventral end 20ef and the dorsal end 20eb) is smaller than the vertical length 30L of the dorsal waist portion 30 (length between the ventral end 30ef and the dorsal end 30eb) (20L < 30L). This reduces the area of ​​the ventral torso section 20 that covers the wearer's legs, making it easier for the wearer to move their legs, while increasing the area of ​​the dorsal torso section 30 that covers the wearer's buttocks.

[0064] Furthermore, the waist extension portion 30B is provided with a back extension elastic member 35 (for example, a thread elastic) that runs in the left-right direction. Multiple back extension elastic members 35 are provided in the waist extension portion 30B at predetermined intervals in the longitudinal direction (up-down direction), as shown in Figure 2. The back extension elastic members 35 are also attached in an extended state between the torso skin-side sheet 31 and the torso non-skin-side sheet 32. The elasticity of the back extension elastic members 35 makes it easier for the waist extension portion 30B of the back torso portion 30 to fit the wearer's buttocks and prevents it from rolling up from the buttocks. In Figure 2, three thread elastics are shown as an example of the back extension elastic members 35, but the number of thread elastics is not particularly limited.

[0065] The basic configuration of the absorbent pant-type article 1 has been described above, but the configuration of the absorbent pant-type article 1 described above is just one example and is not limited thereto. For example, a liquid-permeable intermediate sheet (second sheet) may be provided between the surface sheet 12 and the skin-side sheet 15f. Also, the back waist portion 30 may not have a waist extension portion 30B or a back extension elastic member 35, and may have the same planar shape as the ventral waist portion 20, or the ventral waist portion 20 may have a portion that extends towards the crotch. Furthermore, thread-like ventral waist elastic member 23 and back waist elastic member 33 may be provided at the upper end (waist portion) of the waist portions 20 and 30 to provide a secure fit, and below that, an elastic sheet may be provided instead of the thread-like ventral waist elastic member 24 and back waist elastic member 34. By placing an elastic sheet between the skin-facing torso sheet 21 (skin-facing torso sheet 31) and the non-skin-facing torso sheet 22 (non-skin-facing torso sheet 32), and intermittently joining the laminated sheets, the torso sections 20 and 30 become elastic, providing a soft, even fit to the wearer's torso.

[0066] <Average peel strength at joints 60 and 70> As described above, the absorbent pants-type article 1 of this embodiment is a three-piece type absorbent pants-type article having an absorbent body 10, an abdominal waist portion 20, and a dorsal waist portion 30 which is a separate member from the abdominal waist portion 20, the abdominal end of the absorbent body 10 being joined to the abdominal waist portion 20 at the abdominal joint portion 60, and the dorsal end of the absorbent body 10 being joined to the dorsal waist portion 30 at the dorsal joint portion 70.

[0067] By the way, when a wearer of such a three-piece type of absorbent pants 1 sleeps curled up on their side (hereinafter also simply referred to as "side-sleeping position"), delamination may occur at the interface with the ventral waistband portion 20, particularly at both ends in the left-right direction of the ventral end of the absorbent body 10. To solve this problem, the amount of adhesive may be increased at both the ventral joint portion 60 and the dorsal joint portion 70. This increases the bonding strength between the absorbent body 10 and the ventral waistband portion 20 (and the dorsal waistband portion 30), and even in the aforementioned side-sleeping position, delamination at least at the interface between the absorbent body 10 and the ventral waistband portion 20 can be suppressed. However, when sleeping in a position other than the side-sleeping position, such as on one's back (hereinafter also simply referred to as "supine sleeping position"), the wearer's body pressure is applied to the dorsal joint portion 70, and this body pressure may cause the adhesive to seep out to the outside of the dorsal waistband portion 30, potentially causing problems such as adhesive residue on clothing or bedding.

[0068] Here, the bonding strength, which indicates the strength of the fixation between the torso skin-side sheet 21, the innermost skin-side component of the ventral torso portion 20, and the outer sheet 14, the outermost non-skin-side component of the absorbent body 10, is also the strength required to peel off the fixation between the torso skin-side sheet 21 and the outer sheet 14, i.e., the peel strength at the ventral joint 60. Similarly, the bonding strength, which indicates the strength of the fixation between the torso skin-side sheet 31, the innermost skin-side component of the dorsal torso portion 30, and the outer sheet 14, the outermost non-skin-side component of the absorbent body 10, is also the strength required to peel off the fixation between the torso skin-side sheet 31 and the outer sheet 14, i.e., the peel strength at the dorsal joint 70.

[0069] In the absorbent pant-type article 1 of this embodiment, the basis weight of the adhesive at the ventral joint 60 is made greater than the basis weight of the adhesive at the dorsal joint 70, thereby making the average peel strength of the ventral joint 60 greater than the average peel strength of the dorsal joint 70. In other words, the interface between the absorbent body 10 and the ventral waist portion 20 is less prone to peeling than the interface between the absorbent body 10 and the dorsal waist portion 30.

[0070] The following describes the method for measuring the average delamination strength of the ventral joint 60 and the dorsal joint 70.

[0071] Figure 4 is an explanatory diagram illustrating the measurement area when measuring the average delamination strength of the ventral and dorsal joints.

[0072] The average peel strength at the ventral joint 60 and dorsal joint 70 described above is the average of the maximum peel strengths of each of the multiple measurement areas within the range of the ventral joint 60 and dorsal joint 70. The comparison of the average peel strengths of the ventral joint 60 and dorsal joint 70 is performed after rounding to an integer value. For the ventral joint 60, the multiple measurement areas are the measurement areas M1, M2, and M3 shown in Figure 4. Measurement area M1 is located in the center of the width direction of the pants-type absorbent article 1 and includes the dorsal end of the ventral joint 60 and the dorsal end of the ventral waist circumference 20. Measurement area M2 is the area including the right end of the ventral joint 60 and the right end of the absorbent body 10. Measurement area M3 is the area including the left end of the ventral joint 60 and the left end of the absorbent body 10. Furthermore, the multiple measurement areas for the dorsal joint 70 are the measurement areas M4, M5, and M6 shown in Figure 4. Measurement area M4 is located in the center of the width direction of the pants-type absorbent article 1 and includes the ventral end of the dorsal joint 70 and the ventral end of the dorsal waist portion 30. Measurement area M5 includes the right end of the dorsal joint 70 and the right end of the absorbent body 10. Measurement area M6 includes the left end of the dorsal joint 70 and the left end of the absorbent body 10. The maximum peel strength in each of these multiple measurement areas can be measured by a well-known method.

[0073] For measuring the maximum peel strength, measurement areas M1 to M6 are each cut out to form sample pieces. As shown in Figure 4, each sample piece corresponding to measurement areas M1 to M6 is roughly rectangular in shape and cut to a width of 25 mm. However, if it is not possible to cut to a width of 25 mm, it shall be cut to the maximum possible width. As will be described in more detail later, in the plan view of Figure 2, at both ends in the longitudinal and width directions of the area where the ventral waist portion 20 and the absorbent body 10 overlap, there are non-jointed sections where the ventral waist portion 20 and the absorbent body 10 are not joined. Similarly, at both ends in the longitudinal and width directions of the area where the dorsal waist portion 30 and the absorbent body 10 overlap, there are non-jointed sections where the dorsal waist portion 30 and the absorbent body 10 are not joined. For each sample piece, the ventral waist portion 20 or dorsal waist portion 30 and the absorbent body 10 at these non-jointed sections are used as a pair of gripping sections. The pair of gripping parts are each placed in the chucks of a tensile testing machine, and the load on the tensile testing machine is set to zero to begin measurement. The distance between the chucks is 10 mm, the tensile speed is 100 mm / min, and the maximum load is read. This measurement is performed multiple times (N=10), and the average value of the maximum loads can be calculated to obtain the maximum peel strength. It is preferable to measure the peel strength under constant environmental conditions (for example, a temperature of 20°C (±2°C) and a humidity of 60% (±5%)) when the temperature of the sample piece is stable.

[0074] In the absorbent pants-type article 1 of this embodiment, by increasing the average peel strength of the ventral joint 60 where the ventral end of the absorbent body 10 and the ventral waist portion 20 are joined, it is possible to suppress the separation of the absorbent body 10 and the ventral waist portion 20 when sleeping on one's side. Furthermore, by making the average peel strength of the dorsal joint 70 where the dorsal end of the absorbent body 10 and the dorsal waist portion 30 are joined lower than the average peel strength of the ventral joint 60, it is possible to suppress the leakage of adhesive from the dorsal joint due to the wearer's body pressure when sleeping on one's back. Therefore, it is possible to provide an absorbent pants-type article 1 that achieves both suppression of separation of the absorbent body 10 and the ventral waist portion 20 when sleeping on one's side and suppression of the leakage of adhesive from the dorsal joint due to the wearer's body pressure when sleeping on one's back.

[0075] The difference between the average peel strength of the ventral joint 60 and the average peel strength of the dorsal joint 70 can be achieved, for example, by using different basis weights of hot-melt adhesives or other adhesives on the ventral and dorsal sides of the joints 60 and 70. However, the difference in basis weight here shall be compared using integer values ​​rounded to the nearest whole number. The difference between the average peel strength of the ventral joint 60 and the average peel strength of the dorsal joint 70 can also be achieved by using different adhesive film thicknesses on the ventral and dorsal sides. However, the difference in film thickness here shall be calculated by averaging values ​​measured per unit area at approximately five equally spaced points, and comparing the average values ​​rounded to the nearest whole number. Furthermore, the difference between the average peel strength of the ventral joint 60 and the average peel strength of the dorsal joint 70 may also be achieved, for example, by using different types of adhesives on the ventral and dorsal sides of the joints 60 and 70.

[0076] Furthermore, as shown in Figure 3B above, the non-skin-facing sheet 32 ​​of the back waist portion 30 has a folded portion 36. The folded portion 36 is a part that is folded back from the upper side (longitudinal direction) to the lower side at the upper end of the back waist portion 30. The folded portion 36 also straddles the back end 10eb of the absorbent body 10 in the vertical direction. This prevents direct friction between the back end 10eb of the absorbent body 10, which has a back joint 70 with a lower average peel strength than the ventral joint 60 as described above, and the wearer's body. Therefore, at the back end 10eb of the absorbent body 10, interfacial peeling between the back waist portion 30 and the absorbent body 10 can be reduced.

[0077] <Details of joints 60 and 70> Figure 5 is an enlarged plan view of the absorbent body 10 of the pant-type absorbent item 1 when viewed from the skin side, in an unfolded and stretched state.

[0078] (Relative size relationship of joints 60 and 70 in the longitudinal direction) As shown in Figure 5, the maximum length 60L in the longitudinal direction (vertical direction) of the ventral joint 60 (length between the ventral end 60ef and the dorsal end 60eb) is smaller than the maximum length 70L in the longitudinal direction (vertical direction) of the dorsal joint 70 (length between the ventral end 70ef and the dorsal end 70eb) (60L < 70L). Also, as described above, at both ends of the absorbent body 10 in the left-right direction, the vertical length 20L of the ventral waist portion 20 is smaller than the vertical length 30L of the dorsal waist portion 30 (20L < 30L).

[0079] In the pant-type absorbent article 1 of this embodiment, due to the relative sizes of the ventral waist portion 20 and the dorsal waist portion 30 (20L < 30L), the maximum vertical length 60L of the ventral joint portion 60 is smaller than the maximum vertical length 70L of the dorsal joint portion 70 (60L < 70L). Furthermore, under these circumstances where the longitudinal length of the ventral joint portion 60 is small, the average peel strength of the ventral joint portion 60 is made greater than the average peel strength of the dorsal joint portion 70. As a result, even when the wearer moves their legs on the ventral side while lying on their side, interfacial peeling between the ventral waist portion 20 and the absorbent body 10 can be reduced, and the effect of suppressing the seepage of adhesive due to body pressure on the wearer's back while lying on their back can be enhanced. However, the maximum longitudinal length 60L of the ventral joint 60 may be the same as the maximum longitudinal length 70L of the dorsal joint 70 (60L = 70L), or it may be greater than the maximum longitudinal length 70L of the dorsal joint 70 (60L > 70L).

[0080] (Relationship with the crotch elastic member 17) Furthermore, as shown in Figure 5, when the pant-type absorbent article 1 is viewed in the thickness direction in an unfolded and stretched state, a portion of the back of the crotch elastic member 17 overlaps with the back joint 70. The crotch elastic member 17 reduces the contact area between the absorbent body 10 and the wearer's clothing or bedding by shrinking the absorbent body 10 in the longitudinal direction and forming an uneven surface. The overlap of a portion of the back of the crotch elastic member 17 with the back joint 70 further suppresses the leakage of adhesive due to body pressure on the wearer's back when lying on their back. However, the entire back of the crotch elastic member 17 may overlap with the back joint 70, or at least a portion of the crotch elastic member 17 may overlap with the back joint 70. Moreover, a portion of the back of the crotch elastic member 17 does not have to overlap with the back joint 70.

[0081] Furthermore, as shown in Figure 5, when the pant-type absorbent article 1 is viewed in the thickness direction in an unfolded and stretched state, the ventral joint portion 60 is located ventrally to the ventral end 17ef of the effective length portion of the crotch elastic member 17 in the longitudinal direction. By reducing the effect of expansion and contraction in the effective length of the crotch elastic member 17, which is an element that expands and contracts in the longitudinal direction of the absorbent body 10, at the ventral joint portion 60, the amount of longitudinal expansion of the ventral waist portion 20 and the absorbent body 10 when a force is applied in the direction of interfacial delamination can be reduced, thereby further reducing interfacial delamination between the ventral waist portion 20 and the absorbent body 10. However, a part of the ventral joint portion 60 may be located dorsally to the ventral end 17ef of the effective length portion of the crotch elastic member 17 (i.e., a part of the ventral side of the effective length portion of the crotch elastic member 17 may overlap with the ventral joint portion 60).

[0082] (Relationship with ventral waist elastic member 24 (dorsal waist elastic member 34)) In the pant-type absorbent article 1 of this embodiment, as shown in Figure 5, discontinuous portions (discontinuous portions 24a and 34a, described later) are provided in at least a portion of the area where the ventral waist portion 20 or the dorsal waist portion 30 and the absorbent body 10 overlap in the thickness direction, in order to suppress shrinkage in the width direction of the absorbent core 11, in particular. These discontinuous portions are provided in the ventral waist elastic member 24 (dorsal waist elastic member 34). Note that the arrangement of discontinuous portions 24a and 34a is not limited to the positions shown in Figure 5, and it is sufficient that they are provided in at least the central part of the width direction of the pant-type absorbent article 1 to suppress shrinkage in the width direction of the absorbent core 11. When positioning the ventral torso elastic member 24 (dorsal torso elastic member 34) between the torso skin-side sheet 21 (torso skin-side sheet 31) and the torso non-skin-side sheet 22 (torso non-skin-side sheet 32), the ventral torso elastic member 24 (dorsal torso elastic member 34) is not fixed with adhesive in the discontinuous portion 24a (discontinuous portion 34a), but is cut in the discontinuous portion 24a (discontinuous portion 34a). This allows the ventral torso elastic member 24 (dorsal torso elastic member 34) to retain its elasticity in the portion other than the discontinuous portion 24a (discontinuous portion 34a) (i.e., the continuous portion 24b (continuous portion 34b) described later), while preventing the discontinuous portion 24a (discontinuous portion 34a) from expanding or contracting in the width direction.

[0083] As shown in Figure 5, the ventral waist elastic member 24 has a discontinuous portion 24a that is discontinuous in the left-right direction, and a pair of continuous portions 24b that are continuous in the left-right direction on both sides of the discontinuous portion 24a. In the pants-type absorbent article 1 of this embodiment, the left-right inner ends 24ei of the pair of continuous portions 24b are located inside the widthwise ends of the ventral joint 60, and thus overlap with the ventral joint 60. By increasing the average peel strength of the ventral joint 60, even in areas that are prone to peeling due to the expansion and contraction of the ventral waist elastic member 24, the absorbent body 10 can be kept wide in the left-right direction, thereby suppressing pre-leakage of excretory fluid and reducing discomfort at the left and right ends of the absorbent body 10. However, the left-right inner ends 24ei of the pair of continuous portions 24b are located outside the widthwise ends of the ventral joint 60, and thus do not need to overlap with the ventral joint 60.

[0084] Furthermore, as shown in Figure 5, the back torso elastic member 34 positioned between the torso skin-side sheet 31 and the torso non-skin-side sheet 32 ​​has a discontinuous portion 34a that is discontinuous in the left-right direction, and a pair of continuous portions 34b that are continuous in the left-right direction on both sides of the discontinuous portion 34a. As described above, the back torso elastic member 34 is not fixed with adhesive but cut over the range where the discontinuous portion 34a is located in the left-right direction, so the torso skin-side sheet 31 and the torso non-skin-side sheet 32 ​​are not joined in the portion where the back torso elastic member 34 is cut. In this way, by making the torso skin-side sheet 31 and the torso non-skin-side sheet 32 ​​constituting the back torso portion 30 unjoined in at least a part of the area where body pressure is easily applied, the seepage of adhesive due to body pressure on the wearer's back when lying on their back can be further suppressed.

[0085] However, the torso skin-side sheet 31 and the torso non-skin-side sheet 32 ​​may be joined together over the range in which the discontinuous portion 34a is located in the left-right direction. In this case, the discontinuous portion 24a (discontinuous portion 34a) may also be formed by fixing the ventral torso elastic member 24 (dorsal torso elastic member 34) with adhesive in the portion that becomes the discontinuous portion 24a (discontinuous portion 34a), and cutting the ventral torso elastic member 24 (dorsal torso elastic member 34) at multiple locations in the portion that becomes the discontinuous portion 24a (discontinuous portion 34a) by pressing or the like (i.e., cutting it into small pieces) to eliminate its elasticity.

[0086] (Relationship with the leak-proof wall elastic member 16) As shown in Figure 5, in the longitudinal direction, the dorsal end 60eb of the ventral joint 60 is located ventrally to the ventral end 16ef of the effective length of the leak-proof elastic member 16, and the ventral joint 60 is located ventrally to the effective length of the leak-proof elastic member 16. This reduces the effect of expansion and contraction of the effective length of the leak-proof elastic member 16, which is an element that expands and contracts in the longitudinal direction of the absorbent body 10, at the ventral joint 60. This reduces the amount of longitudinal elongation of the ventral girdle portion 20 and the absorbent body 10 when a force is applied in the direction of interfacial delamination, thereby further reducing interfacial delamination between the ventral girdle portion 20 and the absorbent body 10. However, a portion of the ventral joint 60 may be located dorsally to the ventral end 16ef of the effective length portion of the leak-proof elastic member 16 (i.e., a portion of the effective length portion of the leak-proof elastic member 16 may overlap with the ventral joint 60).

[0087] (others) As described above, in the pant-type absorbent article 1 of this embodiment, by increasing the average peel strength of the ventral joint 60 where the ventral end of the absorbent body 10 and the ventral waist portion 20 are joined, it is possible to suppress the separation of the absorbent body 10 and the ventral waist portion 20 when sleeping on one's side. However, if interfacial delamination occurs between the ventral waist portion 20 and the absorbent body 10, the wearer may not feel discomfort, and the wearer may not realize that a problem has occurred. Therefore, in this embodiment, as shown in Figure 3B, the average peel strength of the joint 13ba between the back film 13 and a sheet member, such as a non-skin side sheet 15b, which is located on the skin side of the back film 13 in the region 13bb ventral (upper) in the longitudinal direction of the absorbent core 11 within the area where the absorbent body 10 is located, is smaller than the average peel strength of the ventral joint 60. As a result, before the interface between the ventral waist portion 20 and the absorbent body 10 peels off, the portion of the sheet member that is closer to the skin, including the absorbent body 10, twists and becomes uneven, allowing the wearer to feel discomfort closer to their skin and making it easier for the wearer to remember to change the absorbent pant-type item 1. However, the average peel strength of the joint between the back film 13 and the sheet member that is positioned closer to the skin than the back film 13 may be the same as or greater than the average peel strength of the ventral joint portion 60.

[0088] Furthermore, in the pant-type absorbent article 1 of this embodiment, the average peel strength of the leak-proof wall end fixing portion 41 on the ventral side in the longitudinal direction is smaller than the average peel strength of the ventral joint portion 60. While peeling at the interface between the ventral waist portion 20 and the absorbent body 10 is unlikely to cause discomfort to the wearer, making it difficult for the wearer to perceive that a problem has occurred, by making the average peel strength of the leak-proof wall end fixing portion 41 smaller than the average peel strength of the ventral joint portion 60, the peeling of the leak-proof wall end fixing portion 41 occurs before peeling at the interface between the ventral waist portion 20 and the absorbent body 10, causing discomfort and making it easier for the wearer to recall to replace the pant-type absorbent article 1. However, the average peel strength of the leak-proof wall end fixing portion 41 may be the same as or greater than the average peel strength of the ventral joint portion 60.

[0089] As described above, the leak-proof wall end fixing portions 41 and 42 are positioned in areas that do not overlap with the highly rigid absorbent core 11. As shown in Figure 5, at least a portion of the leak-proof wall end fixing portion 41 on the ventral side in the longitudinal direction overlaps with the ventral joint portion 60. This increases rigidity by positioning the leak-proof wall end fixing portion 41 in the portion of the absorbent body 10 that is thinner than the portion where the absorbent core 11 is located, thereby suppressing delamination of the ventral joint portion 60. However, the leak-proof wall end fixing portion 41 does not necessarily have to overlap with the ventral joint portion 60.

[0090] Furthermore, in the pant-type absorbent article 1 of this embodiment, the proportion of the area occupied by the ventral joint portion 60 to the area where the ventral waist portion 20 and the absorbent body 10 overlap is made large. Specifically, when the area where the ventral waist portion 20 and the absorbent body 10 overlap is called the overlapping area OL, the value obtained by dividing the area of ​​the ventral joint portion 60 by the area of ​​the overlapping area OL is 70% or more. Non-jointed portions 80 are provided at both ends in the longitudinal direction of the overlapping area OL and at both ends in the width direction of the overlapping area OL, where the ventral waist portion 20 and the absorbent body 10 are not joined. As a result, even when the proportion of the area occupied by the ventral joint portion 60 to the overlapping area OL is increased in a situation where the overlapping area OL between the ventral waist portion 20 and the absorbent body 10 is narrow, it is possible to suppress the leakage of adhesive from the ventral joint portion 60. Furthermore, at both ends in the longitudinal and width directions of the region where the dorsal waist portion 30 and the absorbent body 10 overlap, non-jointed portions are provided where the dorsal waist portion 30 and the absorbent body 10 are not joined. However, it is not necessary for the non-jointed portions 80 to be provided.

[0091] As shown in Figure 5, the ventral joint 60 covers the absorbent core 11 in the left-right direction, and both ends of the ventral joint 60 in the left-right direction are located inward from both ends of the absorbent body 10 in the left-right direction. This allows the ventral joint 60 to cover the area of ​​the absorbent body 10 where the absorbent core 11, which is a highly rigid area, is located, in the left-right direction, thereby further reducing delamination at the interface between the ventral girdle portion 20 and the absorbent body 10, and suppressing the leakage of adhesive from the ventral joint 60. However, the ventral joint 60 does not necessarily have to cover the absorbent core 11 in the left-right direction, and at least one of the ends of the ventral joint 60 in the left-right direction may be located outward from both ends of the absorbent body 10 in the left-right direction.

[0092] <Cross-section of the ventral joint 60> Figure 6 is an explanatory diagram illustrating a cross-section of the ventral joint 60.

[0093] As shown in Figure 6, the outer sheet 14, which is a component joined to the ventral waist portion 20 of the absorbent body 10, has an absorbent body side compression region 18 on its non-skin side. The absorbent body side compression region 18 is the region where a compression portion 18a is provided. The compression portion 18a is the part of the outer sheet 14 that is compressed in the thickness direction compared to the surrounding portion 18b. In other words, the non-skin side surface of the outer sheet 14 is an embossed surface. Similarly, the waist skin side sheet 21, which is a component joined to the absorbent body 10 of the ventral waist portion 20, has a waist side compression region 28 on its skin side. The waist side compression region 28 is the region where a compression portion 28a is provided. The compression portion 28a is the part of the waist skin side sheet 21 that is compressed in the thickness direction compared to the surrounding portion 28b. In other words, the skin-facing surface of the torso-side skin-facing sheet 21 is also an embossed surface, and the embossed surface of the outer sheet 14 and the embossed surface of the torso-side skin-facing sheet 21 face each other.

[0094] At this time, in the ventral joint 60 between the outer sheet 14 and the torso skin-side sheet 21, an adhesive such as a hot melt adhesive is placed inside the compressed portion 28a of the torso side compressed region 28 and inside the compressed portion 18a of the absorbent body side compressed region 18. Furthermore, the adhesive is impregnated to a predetermined depth in the surrounding portion 28b of the torso side compressed region 28 and the surrounding portion 18b of the absorbent body side compressed region 18.

[0095] In this way, on the embossed surface where the ventral waist portion 20 and the absorbent body 10 face each other, the adhesive penetrates into the recesses (compression portions 18a and 28a) and impregnates to a predetermined depth in the convex portions (peripheral portions 18b and 28b), thereby improving the anchoring properties of the adhesive. As a result, even when the wearer moves their legs on their ventral side while lying on their side, the delamination of the interface between the ventral waist portion 20 and the absorbent body 10 can be reduced, and the effect of suppressing the leakage of adhesive due to body pressure on the wearer's back while lying on their back can be enhanced.

[0096] The above description concerns the ventral joint 60 where the ventral waist portion 20 and the absorbent body 10 are joined, but the same may apply to the dorsal joint 70 where the dorsal waist portion 30 and the absorbent body 10 are joined. That is, a waist portion compression area is provided on the skin side of the dorsal waist portion, and the adhesive of the dorsal joint may also be placed inside the compression areas of the waist portion compression area and the absorbent body compression area, and may be impregnated to a predetermined depth around the waist portion compression area and the absorbent body compression area.

[0097] <Relationship between average peel strengths in the left-right direction within joints 60 and 70> Figure 7 is an explanatory diagram illustrating the regions obtained by dividing the ventral junction 60 into three equal parts in the left-right direction, and the regions obtained by dividing the dorsal junction 70 into three equal parts in the left-right direction.

[0098] As shown in Figure 7, the ventral junction 60 is divided into three equal regions in the left-right direction. The central region is designated as the ventral central region A1, the region on the right as the ventral right region A2, and the region on the left as the ventral left region A3. Similarly, the dorsal junction 70 is divided into three equal regions in the left-right direction. The central region is designated as the dorsal central region A4, the region on the right as the dorsal right region A5, and the region on the left as the dorsal left region A6.

[0099] The combination of the region with the highest average peel strength among the three equally divided regions (A1-A3) of the ventral joint 60 and the region with the highest average peel strength among the three equally divided regions (A4-A6) of the dorsal joint 70 is either the ventral right region A2 and the dorsal left region A5, or the ventral left region A3 and the dorsal right region A6. In this way, by aligning the left-right position of the region with the highest average peel strength among the three equally divided regions of the joints 60 and 70 in the left-right direction on the ventral and dorsal sides, even when a pulling force is applied from one side of the pant-type absorbent article 1 in the left-right direction, interfacial peeling between the ventral waist portion 20 or the dorsal waist portion 30 and the absorbent body 10 can be further reduced. However, the combination of the region with the highest average peel strength among the three equally divided regions of the ventral joint 60 and the region with the highest average peel strength among the three equally divided regions of the dorsal joint 70 may be any combination other than those described above.

[0100] Also, the average peel strength of the ventral right region A2 or the ventral left region A3 is greater than that of the ventral central region A1 (A1 < A2 or A1 < A3), and the average peel strength of the dorsal right region A5 or the dorsal left region A6 is greater than that of the dorsal central region A4 (A4 < A5 or A4 < A6). Thus, among the regions obtained by trisecting the joints 60 and 70 in the left-right direction, the average peel strength of the regions (A2, A3, or A5, A6) closer to the left and right ends of the absorbent body 10 is greater than that of the central region (A1 or A4). This enables further reduction of interfacial peeling between the ventral body circumferential portion 20 or the dorsal body circumferential portion 30 and the absorbent body 10 even against the force pulled from the end side of the ventral joint 60 or the dorsal joint 70. However, the average peel strength of the central region (A1 or A4) among the regions obtained by trisecting the joints 60 and 70 in the left-right direction may be the greatest.

[0101] ===Other=== The above embodiments are for facilitating understanding of the present invention and are not for limiting interpretation of the present invention. It is needless to say that the present invention can be changed and improved without departing from its gist, and equivalents thereof are included in the present invention.

Description of Reference Numerals

[0102] 1 Pant-type absorbent article, 2 Side joint, 3 Leakage-preventing wall portion, 10 Absorbent body, 11 Absorbent core, 12 Surface sheet, 13 Back film, 14 Outer wrapper sheet, 15f Skin-side sheet, 15fa Skin-side sheet joint, 15b Non-skin-side sheet, 15ba Non-skin-side sheet joint, 16 Leakage-preventing wall elastic member, 17 Inseam elastic member, 18 Absorbent body side squeezing region, 18a Squeezing portion, 18b Peripheral portion, 20 Ventral body circumferential portion, 21 Body circumferential skin-side sheet, 22 Body circumferential non-skin-side sheet, 23,24 Ventral circumferential elastic member, 24a discontinuous portion, 24b continuous portion, 26 Folded section, 28 Side compression area around the torso, 28a Compression area, 28b Peripheral area, 30. Dorsal girth area, 30A Waist side, 30B Waist extension, 31. Waistband skin-side sheet, 32. Waistband non-skin-side sheet, 33,34 Dorsal body elastic member, 34a Discontinuous portion, 34b Continuous portion, 35 Dorsal extension elastic member, 36 Folded portion, 41, 42 End fixing part of leak-proof wall, 43 Intermediate fixing part of leak-proof wall, 46 Both ends, 47 Middle section, 48 Upright section, 60 ventral junction, 70 dorsal junction, 80 nonjunction, BH (Waist opening), LH (Legs opening)

Claims

1. It has vertical and horizontal directions, It has a ventral waist portion, a dorsal waist portion which is a separate component from the ventral waist portion, and an absorbent body. The ventral end of the absorbent body is joined to the ventral torso portion at the ventral joint, The absorbent article is a pair of pants in which the back end of the absorbent body is joined to the back waist portion at the back joint, A pant-type absorbent article characterized in that the average peel strength of the ventral joint is greater than the average peel strength of the dorsal joint.

2. The absorbent pant-type article according to claim 1, The maximum vertical length of the ventral joint is smaller than the maximum vertical length of the dorsal joint, and A pant-type absorbent article characterized in that, at both ends of the absorbent body in the left-right direction, the vertical length of the ventral waist portion is smaller than the vertical length of the dorsal waist portion.

3. The absorbent pant-type article according to claim 1, A compression region is provided on the skin side of at least one of the ventral and dorsal waist portions, having a compression portion that is compressed in the thickness direction of the waist portion more than the surrounding portion. The non-skin side of the absorbent body is provided with an absorbent body side compression region having a compression portion that is compressed in the thickness direction of the absorbent body more than the surrounding portion. At least one of the ventral joint and the dorsal joint has an adhesive that joins the compression region on the girth side and the compression region on the absorbent body side. The aforementioned adhesive It is also located inside the compression portion of the compression region on the side of the torso, and inside the compression portion of the compression region on the side of the absorbent body, A pant-type absorbent article characterized in that the surrounding area of ​​the compression region on the waist side and the surrounding area of ​​the compression region on the absorbent body side are impregnated to a predetermined depth.

4. The absorbent pant-type article according to claim 1, The dorsal torso portion has a folded portion at its upper end that is folded back from the upper side to the lower side in the vertical direction. The pant-type absorbent article is characterized in that, when viewed in the thickness direction of the pant-type absorbent article, the folded portion straddles the back end of the absorbent body in the vertical direction.

5. The absorbent pant-type article according to claim 1, In a state where the absorbent pant-type absorbent article is unfolded and stretched so that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, The crotch elastic member is provided on the non-skin side of the absorbent core of the absorbent body and stretches along the longitudinal direction, The pants-type absorbent article is characterized in that, when viewed in the thickness direction of the pants-type absorbent article, at least a portion of the crotch elastic member overlaps with the dorsal joint portion.

6. The absorbent pant-type article according to claim 1, In a state where the absorbent pant-type absorbent article is unfolded and stretched so that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, The crotch elastic member is provided on the non-skin side of the absorbent core of the absorbent body and has a portion that is stretchable along the longitudinal direction together with the absorbent body, The absorbent pant-type article is characterized in that, when viewed in the thickness direction of the absorbent pant-type article, the ventral joint portion is located ventrally to the ventral end of the portion in the longitudinal direction.

7. The absorbent pant-type article according to claim 1, The dorsal torso portion comprises a skin-side sheet, a non-skin-side sheet provided on the non-skin side of the skin-side sheet, and a dorsal torso elastic member positioned between the skin-side sheet and the non-skin-side sheet, which is expandable and contractible in the left-right direction. The aforementioned elastic member around the back of the torso has a discontinuous portion that is discontinuous in the left-right direction, and a pair of continuous portions that are continuous in the left-right direction on both sides of the discontinuous portion in the left-right direction. A pant-type absorbent article characterized in that the skin-side sheet and the non-skin-side sheet are not joined together over the range in which the discontinuous portion is located in the left-right direction.

8. The absorbent pant-type article according to claim 1, In a state in which the absorbent pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, The absorbent body has a pair of leak-proof walls on both sides in the width direction, The aforementioned leak-proof wall portion has a leak-proof wall elastic member that, together with the absorbent body, has a portion that can expand and contract along the longitudinal direction. The absorbent pant-type article is characterized in that, when viewed in the thickness direction of the absorbent pant-type article, the ventral joint portion is located ventrally to the portion in the longitudinal direction.

9. The absorbent pant-type article according to claim 1, A back film positioned on the non-skin side of the absorbent core of the absorbent body, It has a sheet member positioned on the skin side of the back film, In a state where the absorbent pant-type absorbent article is unfolded and stretched so that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, A pant-type absorbent article characterized in that, when viewed in the thickness direction of the absorbent body, the average peel strength between the back film and the sheet member in the region of the area where the absorbent body is arranged, ventral to the absorbent core in the longitudinal direction, is smaller than the average peel strength of the ventral joint.

10. The absorbent pant-type article according to claim 1, In a state in which the absorbent pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, The absorbent body has a pair of leak-proof wall sections provided on both sides in the width direction and equipped with expandable and contractible leak-proof wall elastic members along the longitudinal direction. The leak-proof wall portion is provided with end fixing portions that secure both ends of the aforementioned leak-proof wall portion in the longitudinal direction to the skin-side surface of the absorbent body. A pant-type absorbent article characterized in that the average peel strength of the leak-proof wall end fixing portion on the ventral side in the longitudinal direction is smaller than the average peel strength of the ventral joint portion.

11. The absorbent pant-type article according to claim 1, The ventral torso portion has an elastic ventral torso member that can expand and contract in the left-right direction, The ventral body elastic member has a discontinuous portion that is discontinuous in the left-right direction, and a pair of continuous portions that are continuous in the left-right direction on both sides of the discontinuous portion in the left-right direction. The absorbent pant-type article is characterized in that, when viewed in the thickness direction, the inner ends of the pair of continuous portions in the left-right direction overlap with the ventral joint portion.

12. The absorbent pant-type article according to claim 1, In a state in which the absorbent pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, The absorbent body comprises an absorbent core and a pair of leak-proof wall sections provided on both sides in the width direction and equipped with leak-proof wall elastic members that are expandable and contractible along the longitudinal direction of the absorbent body. The end portions of the leak-proof wall portion in the longitudinal direction are provided with leak-proof wall end fixing portions that fix the ends of the leak-proof wall portion to the skin-side surface of the absorbent body located outside the absorbent core in the left-right direction, The pant-type absorbent article is characterized in that, when viewed in the thickness direction of the pant-type absorbent article, at least a portion of the leak-proof wall end fixing portion on the ventral side in the longitudinal direction overlaps with the ventral joint portion.

13. The absorbent pant-type article according to claim 1, In a state in which the absorbent pant-type absorbent article is unfolded and stretched such that the longitudinal direction of the absorbent body is aligned with the vertical direction of the pant-type absorbent article, and the width direction of the absorbent body is aligned with the left-right direction of the pant-type absorbent article, When viewed in the thickness direction of the aforementioned pant-type absorbent article, there is an overlapping region where the ventral waist portion and the absorbent main body overlap. The value obtained by dividing the area of ​​the ventral junction by the area of ​​the overlapping region is 70% or more. A pant-type absorbent article characterized in that the ventral waist portion and the absorbent main body are not joined at both ends in the longitudinal direction of the overlapping region and at both ends in the width direction of the overlapping region.

14. The absorbent pant-type article according to claim 1, The absorbent body has an absorbent core, The pant-type absorbent article is characterized in that, when viewed in the thickness direction, the ventral joint covers the absorbent core in the left-right direction, and both ends of the ventral joint in the left-right direction are located inward from both ends of the absorbent body in the left-right direction.

15. The absorbent pant-type article according to claim 1, The ventral junction is divided into three equal regions in the left-right direction, and these regions are designated as the ventral right region, the ventral central region, and the ventral left region, respectively. When the dorsal joint is divided into three equal regions in the left-right direction, these regions are designated as the dorsal right region, the dorsal central region, and the dorsal left region, The absorbent pant-type article is characterized in that the combination of the region with the highest average peel strength among the three equally divided regions of the ventral joint and the region with the highest average peel strength among the three equally divided regions of the dorsal joint is the combination of the ventral right region and the dorsal right region, or the combination of the ventral left region and the dorsal left region.

16. The absorbent pant-type article according to claim 1, The ventral junction is divided into three equal regions in the left-right direction, and these regions are designated as the ventral right region, the ventral central region, and the ventral left region, respectively. When the dorsal joint is divided into three equal regions in the left-right direction, these regions are designated as the dorsal right region, the dorsal central region, and the dorsal left region, The average delamination strength of the ventral right region or the average delamination strength of the ventral left region is greater than the average delamination strength of the ventral central region. A pant-type absorbent article characterized in that the average peel strength of the right region of the back or the average peel strength of the left region of the back is greater than the average peel strength of the central region of the back.

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