WO2022254748A1 - Pants-type absorbent article - Google Patents

Abstract

A pants-type absorbent article (1) has an absorbent core (12) and an exterior body (20). The exterior body (20) is provided with non-stretchable sheets (211, 221, 212, 222) and stretchable sheets (213, 223) that are bonded intermittently at a plurality of bonding portions (40). The plurality of bonding portions (40) include first bonding portions (41) and second bonding portions (42) that are different in shape and/or area. In a region in which the exterior body (20) overlaps the absorbent core (12) in the thickness direction, the exterior body (20) has a region in which a first bonding region including the plurality of first bonding portions (41) overlaps a second bonding region including the plurality of second bonding portions (42).

Description

Pants-type absorbent article

The present invention relates to pants-type absorbent articles.

In the pants-type absorbent article of Patent Document 1, an elastic film is laminated between the first sheet layer and the second sheet layer, and the first sheet layer and the second sheet layer are arranged with a gap therebetween. It has an elastic structure joined with In addition, by increasing the area ratio of the point-like joints in the portion overlapping the absorbent core (absorbent body) in the elastic structure, the non-stretchable region is formed by processing in a state where the contractile force does not act, and the absorbent core shrinkage is suppressed. As a method of increasing the area ratio of the point-like joints in the non-stretchable region, a method of increasing the area of each point-like joint or increasing the number of point-like joints per unit area has been disclosed.

JP 2016-140477 A

However, in the non-stretchable region of Patent Document 1, only one kind of point-like joints having the same shape and the same area are arranged. Therefore, in the non-stretchable region of Patent Document 1, a plurality of point-like joints with a relatively large area are arranged, or more point-like joints with a relatively small area are arranged. .
If the area of all the point-like joints arranged in the non-stretchable region is large, the contractile force of the non-stretchable region can be reliably suppressed, but the user is likely to feel the hardness of the point-like joints. On the other hand, if the area of all the point-like joints arranged in the non-stretchable region is small, it is difficult for the user to feel the hardness of the point-like joints, but there is a risk that the contractile force of the non-stretchable region cannot be suppressed. .
In a stretchable structure in which a non-stretchable sheet (first sheet layer, second sheet layer) and a stretchable sheet (elastic film) are joined intermittently, the deflection of the non-stretchable sheet between the point joints during contraction (unevenness) occurs. If the non-stretchable sheet bends too much or the number of bends is large, unevenness of the non-stretchable sheet is conspicuous in the portion overlapping with the absorbent core. Then, it becomes difficult for the user to check the size of the absorbent core, and the user may feel uneasy about leakage.

The present invention has been made in view of the above problems, and its object is to suppress the shrinkage of the absorbent core due to the stretchable sheet, and to reduce the unevenness of the outer packaging that overlaps the absorbent core. To provide a pants-type absorbent article which suppresses hardness while reducing a user's anxiety about leakage by suppressing.

The main invention for achieving the above object is an absorbent main body having vertical, horizontal, and front-back directions and having an absorbent core, and an outer body disposed on the non-skin side of the absorbent main body. wherein the outer body includes a non-stretchable sheet and a stretchable sheet that stretches in the left-right direction, and the non-stretchable sheet and the stretchable sheet include a plurality of intermittently joined by joints, wherein the plurality of joints includes a plurality of first joints having the same shape and the same area and a plurality of second joints having the same shape and the same area, At least one of a shape and an area is different between the first joint portion and the second joint portion, and the exterior body includes a first joint region in which a plurality of the first joint portions are arranged, and a plurality of the When the underpants-type absorbent article in the unfolded state is planarly viewed in the thickness direction, the outer body includes the second joint region where the second joint is arranged, and the outer body is the absorbent core. The underpants-type absorbent article is characterized in that, in the overlapping region in the thickness direction, the first joint region and the second joint region have overlapping regions.
Other features of the present invention will become apparent from the description of the specification and accompanying drawings.

According to the present invention, the shrinkage of the absorbent core due to the stretchable sheet is suppressed, and the unevenness of the exterior body overlapping the absorbent core is suppressed, thereby reducing the user's anxiety about leakage and suppressing the hardness. A pant-type absorbent article can be provided.

1 is a schematic perspective view of an underpants-type disposable diaper 1. FIG. Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state, viewed from the skin side; FIG. 3 is a schematic cross-sectional view taken along line II of FIG. 2; 4 is an explanatory diagram of a joint portion 40 arranged on the front body portion 21. FIG. FIG. 4 is an explanatory diagram of a joint portion 40 arranged on a back body portion 22; FIG. 6A is an explanatory diagram of the overlap region OR1 between the first joint region R1 and the second joint region R2, and FIG. 6B is an explanatory diagram of the overlap region OR2 between the third joint region R3 and the second joint region R2. be. 7A to 7C are explanatory diagrams of unevenness in the exterior body 20. FIG. 8A to 8C are diagrams showing modifications of the arrangement of the first joint portion 41 and the second joint portion 42 in the overlapping region OR1. 9A to 9F are explanatory diagrams of a joint 40 having a shape with a longitudinal direction. It is a figure which shows the modification of the junction part 40 distribute|arranged to the diaper 1. FIG. 11A and 11B are explanatory diagrams of the first overlap region OR1 in a group of diapers 1 having different sizes.

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and having an absorbent main body provided with an absorbent core, and an exterior body arranged on the non-skin side of the absorbent main body. , the exterior body includes a non-stretchable sheet and a stretchable sheet that stretches in the left-right direction, the non-stretchable sheet and the stretchable sheet are intermittently joined by a plurality of joints, and The plurality of joints includes a plurality of first joints having the same shape and the same area and a plurality of second joints having the same shape and the same area, wherein the first joints and the second joints are Then, at least one of a shape and an area is different, and the exterior body includes a first joint region in which a plurality of the first joints are arranged and a second joint region in which a plurality of the second joints are arranged. When the underpants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body includes a region overlapping the absorbent core in the thickness direction. A pants-type absorbent article characterized by having a region in which the first joint region and the second joint region overlap.

According to such a pants-type absorbent article, the shrinkage force of the stretchable sheet can be reduced more reliably and significantly due to the large area and size of the joints in the region of the outer covering that overlaps the absorbent core. Therefore, contraction of the absorbent core in the lateral direction can be suppressed. In addition, since the joints with small areas and small dimensions can reduce the deflection of the non-stretchable sheet between the joints without making the outer package stiffer, it is possible to suppress irregularities on the surface of the outer package that overlaps the absorbent core. . Therefore, it becomes easier for the user to check the size of the absorbent core, and anxiety about leakage can be reduced. In addition, since the bending of the non-stretchable sheet between the joints (the height of the protrusion) is reduced, the angle of the non-stretchable sheet with respect to the contraction direction (horizontal direction) of the stretchable sheet is reduced. As a result, the resistance of the non-stretchable sheet to the shrinkage force of the stretchable sheet is increased, and the shrinkage force of the stretchable sheet can be further reduced.

This underpants-type absorbent article is characterized in that the first joint portion is longer in the vertical direction than the second joint portion.

According to such a pants-type absorbent article, the shrinkage force of the stretchable sheet can be reduced over a wide range in the vertical direction by the vertically long first joint portion.

This underpants-type absorbent article is characterized in that the area of the first joint is larger than that of the second joint.

According to such a pants-type absorbent article, the elastic properties of the elastic sheet can be more reliably eliminated by the large area of the first joint portion, and the contractile force of the elastic sheet can be reduced.

In this underpants-type absorbent article, at least some of the first joints and the second joints arranged in the overlapping region overlap each other at least partially in the vertical direction. An underpants-type absorbent article characterized by:

According to such a pants-type absorbent article, the bending of the non-stretchable sheet that occurs between the first joints arranged in the left-right direction can be directly suppressed by the second joints, and the bending can be reduced. Therefore, unevenness on the surface of the outer covering that overlaps with the absorbent core can be suppressed.

In this underpants-type absorbent article, at least some of the first joints and the second joints arranged in the overlapping region are characterized in that the positions in the vertical direction do not overlap. Pants-type absorbent article.

According to such a pants-type absorbent article, the shrinkage force of the stretchable sheet can be reduced over a wide range in the vertical direction by the first joint and the second joint that are displaced in the vertical direction. In addition, the hardness of the exterior body due to the joints can be dispersed in the vertical direction while reducing the bending of the non-stretchable sheet between the joints.

In such a pants-type absorbent article, when the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, at least a part of the first joints arranged in the overlapping region A pants-type absorbent article, wherein the part and the second joint partially overlap each other in the thickness direction.

According to such a pants-type absorbent article, it is possible to more reliably eliminate (reduce) the elastic properties of the elastic sheet at the sites where the joints overlap in the thickness direction. On the other hand, it is possible to reduce the deflection of the non-stretchable sheet between the joints at the site where the joints do not overlap in the thickness direction.

In this underpants-type absorbent article, one first joint portion, one second joint portion, and another first joint portion are arranged in order from one side in the left-right direction in the overlapping region. and in the left-right direction, the one first joint is arranged closer to the one second joint than the other first joint. type absorbent article.

According to such a pants-type absorbent article, the deflection of the non-stretchable sheet between the first joint and the second joint that are arranged close to each other can be reduced, and the surface of the outer body overlapping the absorbent core Concavities and convexities that are easily visible to the user can be reduced. Therefore, the user can easily confirm the size of the absorbent core.

In this underpants-type absorbent article, the plurality of joints includes the joints having a shape having a long axis direction, and the long axis direction of the joints is parallel to the up-down direction and the left-right direction. A pants-type absorbent article, characterized in that it is arranged so as to be tilted.

According to such a pants-type absorbent article, since the long axis direction of the joint portion does not extend along the vertical direction and the horizontal direction, the rigidity in the vertical direction and the rigidity in the horizontal direction of the exterior body can be reduced. Therefore, the outer body can easily fit around the wearer's waist and vertical bulges (abdomen and buttocks), making it difficult for the user to feel the stiffness of the pants-type absorbent article.

In such a pants-type absorbent article, the leg elastic members arranged in the portion of the exterior body on at least one side in the front-rear direction are a pair of curved members along a pair of leg openings of the pants-type absorbent article. and a central region along the left-right direction connecting the pair of curved regions, the plurality of joints includes a plurality of third joints having the same shape and the same area, The joint portion differs from the first joint portion and the second joint portion in at least one of a shape and an area, and the third joint portion has a length in the left-right direction that is larger than that of the first joint portion. is long, the length in the vertical direction is long, and the area is large, and the exterior body has a third joint region in which a plurality of the third joints are arranged When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body has the above in the region where the central region and the absorbent core overlap in the thickness direction A pants-type absorbent article characterized by having a region where the second joint region and the third joint region overlap.

According to such a pants-type absorbent article, the contractile force in the region of the outer body where the leg elastic members are arranged in addition to the stretchable sheet can be reliably greatly reduced by the third joint portion having a large size and area. .

In such a pants-type absorbent article, when the pants-type absorbent article in an unfolded state is viewed from above in the thickness direction, the outer body is positioned between the upper end portion of the absorbent core and the thickness direction. The value obtained by dividing the total area of the joints arranged in the end region by the area of the end region is the first joint region and the second joint A pants-type absorbent article, wherein the total area of the joints arranged in an overlapping region is smaller than a value obtained by dividing the total area by the area of the overlapping region.

According to such a pants-type absorbent article, it is possible to suppress a sudden change in contractile force of the stretchable sheet at the boundary between the part where the absorbent core and the exterior body overlap and the part where they do not overlap.

In such a pants-type absorbent article, the pants-type absorbent article has a first size, and the area of the region where the first joint region and the second joint region overlap is defined by the area of the outer body. The value divided by the total area is different from the value divided by the other pants-type absorbent article having the same brand name and sub-brand name as the pants-type absorbent article and being the second size. A pants-type absorbent article characterized by:

According to such a pants-type absorbent article, since the contractile force of the stretchable sheet can be reduced according to the size of the absorbent core corresponding to the size, the contraction of the absorbent core can be suppressed, and the absorbent core overlaps with the absorbent core. The unevenness of the surface of the exterior body can be reduced.

Further, a first pants-type absorbent article of a first size and a second pants-type absorbent article of a second size are provided, and the first pants-type absorbent article and the second pants-type absorbent article are provided. is a group of pants-type absorbent articles having the same brand name and sub-brand name, and the first pants-type absorbent article and the second pants-type absorbent article are each , a vertical direction, a horizontal direction, and a front-back direction, and has an absorbent main body provided with an absorbent core, and an outer body disposed on the non-skin side of the absorbent main body, wherein A non-stretchable sheet and a stretchable sheet that stretches in the left-right direction are provided, and the non-stretchable sheet and the stretchable sheet are intermittently joined by a plurality of joints, and the plurality of joints are: A plurality of first joints having the same shape and the same area, and a plurality of second joints having the same shape and the same area, wherein the first joints and the second joints have different shapes and areas At least one of them is different, and the exterior body includes a first joint region in which a plurality of the first joints are arranged and a second joint region in which a plurality of the second joints are arranged, When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body includes the first joint region and the The value obtained by dividing the area of the region where the first joint region and the second joint region overlap by the total area of the exterior body is the above A group of pants-type absorbent articles, wherein the first pants-type absorbent article and the second pants-type absorbent article are different.

According to such a group of pants-type absorbent articles, the shrinkage force of the stretchable sheet can be reduced according to the size of the absorbent core according to the size, so that the shrinkage of the absorbent core can be suppressed and the absorbent core can be It is possible to reduce irregularities on the surface of the exterior body that overlaps with.

===Embodiment===
Hereinafter, an embodiment will be described by taking an underpants-type disposable diaper for adults as an example of the underpants-type absorbent article. However, it is not limited to this, and the pants-type absorbent article according to the present invention can be applied, for example, as disposable diapers for children, sanitary shorts, and the like.

<<Basic Configuration of Diaper 1>>
FIG. 1 is a schematic perspective view of an underpants-type disposable diaper 1 (hereinafter also referred to as diaper 1). FIG. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state, viewed from the skin side. FIG. 3 is a schematic cross-sectional view taken along line II (center in the left-right direction) of FIG.

The unfolded state of the diaper 1 is a state in which the pair of side joints 24 provided on both sides of the pants-type diaper 1 are separated and the diaper 1 is opened and unfolded in a plane. The stretched state of the diaper 1 is a state in which the elastic members provided in the diaper 1 are stretched to such an extent that the wrinkles of the diaper 1 become invisible. Specifically, the dimensions of each member constituting the diaper 1 are stretched until they match or are close to the dimensions of the individual members (that is, the dimensions of the elastic members when the elastic characteristics are not exhibited). be.

The diaper 1 has an up-down direction, a left-right direction, and a front-rear direction that intersect with each other, and has a thickness direction in which each material is laminated as shown in FIG. In the up-down direction, the side to be the wearer's torso side is the upper side, and the wearer's crotch side is to be the lower side. In the front-rear direction, the front side is the side that serves as the wearer's ventral side, and the rear side is the side that serves as the wearer's dorsal side. Thickness direction WHEREIN: Let the side which touches a wearer be a skin side, and let the other side be a non-skin side.

The diaper 1 has an absorbent main body 10 and an exterior body 20 arranged on the non-skin side of the absorbent main body 10 . The non-skin side of the absorbent main body 10 is joined to the skin side of the exterior body 20 with an adhesive or the like. The outer body 20 is composed of three members, and has a front body portion 21 corresponding to the abdomen of the wearer, a back body portion 22 corresponding to the back side of the wearer, and a crotch portion 23 connecting them.

In the diaper 1 of this embodiment, the outer body 20 is composed of three members (the front body part 21, the back body part 22, and the crotch part 23), but the present invention is not limited to this. For example, the front body part 21, the back body part 22, and the crotch part 23 may be configured as one continuous member. Moreover, it is good also as a structure which does not have the crotch part 23. FIG.

In the unfolded diaper 1 shown in FIG. 2 , the front body part 21 is positioned at one longitudinal end of the absorbent body 10 , and the back body part 22 is positioned at the other longitudinal end of the absorbent body 10 . is doing. Both ends of the absorbent main body 10 in the longitudinal direction are covered with the inner layer sheets 2 and 3 from the skin side. In the diaper 1 in the unfolded state, the absorbent main body 10 is folded in half at substantially the center in the longitudinal direction, and both lateral side portions of the front body portion 21 and both lateral side portions of the back body portion 22 are joined by welding or the like. , a pair of side joints 24 are formed to form the pants type shown in FIG. That is, the longitudinal direction of the absorbent main body 10 is along the vertical direction of the diaper 1, the front body part 21 and the back body part 22 are connected in a ring shape, and the waist opening 1a is formed at the upper end thereof. leg opening 1b is formed.

The absorbent main body 10 has a rectangular shape in plan view, and as shown in FIG. and a back sheet 13 positioned on the non-skin side of the body. The back sheet 13 of this embodiment has a two-layer structure of a liquid-impermeable sheet 13a and a hydrophobic liquid-permeable sheet (for example, hydrophobic nonwoven fabric) 13b arranged on the non-skin side thereof.

The absorbent core 12 is a member that absorbs and retains excretions such as urine, and is made of, for example, liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP) molded into a predetermined shape. I can give an example. Although not shown, the absorbent core 12 may be covered with a liquid-permeable sheet such as tissue paper or non-woven fabric.

As shown in FIG. 2, the front body part 21 and the back body part 22 have waist regions 21A and 22A, which overlap with the side joints 24 in the vertical direction, and the crotch side below it. It has regions 21B and 22B.

The crotch regions 21B and 22B have a substantially trapezoidal shape, and the width (the length in the left-right direction) becomes narrower toward the lower side. In addition, the back body part 22 has a larger crotch region 22B than the front body part 21, and can cover the wearer's buttocks.

The front body part 21, the back body part 22, and the crotch part 23 are positioned between non-skin- side sheets 211, 221, 231 and skin- side sheets 212, 222, 232, respectively, as shown in FIG. It has elastic sheets 213 , 223 , 233 . Thread-like waist elastic members 214 and 224 that expand and contract in the left-right direction are arranged at the upper ends of the front body part 21 and the back body part 22 . As a result, the upper end portion of the diaper 1 along the waist opening 1a fits the wearer, and the diaper 1 can be prevented from slipping off. In addition, on both sides in the left-right direction of the crotch region 21B of the front body portion 21, the crotch region 22B of the back body portion 22, and the crotch portion 23, thread-like leg elastic members are provided along the leg openings 1b. 215, 225 and 234 are arranged. As a result, the diaper 1 fits around the wearer's legs and can suppress leakage of excrement. On the other hand, the parts of the outer body 20 where the elastic sheets 213, 223, 233 are arranged can fit loosely to the wearer.

===About the joint 40===
FIG. 4 is an explanatory view of the joint portion 40 arranged on the front body portion 21. As shown in FIG. FIG. 5 is an explanatory view of the joint portion 40 arranged on the back body portion 22. As shown in FIG. FIG. 6A is an explanatory diagram of the overlap region OR1 between the first joint region R1 and the second joint region R2, and FIG. 6B is an explanatory diagram of the overlap region OR2 between the third joint region R3 and the second joint region R2. be. 7A to 7C are explanatory diagrams of unevenness in the exterior body 20. FIG.

The front body part 21 and the back body part 22 (outer body 20) are provided with non-skin- side sheets 211, 221, skin- side sheets 212, 222, and elastic sheets 213, 223 that stretch in the left-right direction. The non-skin- side sheets 211 and 221 and the skin- side sheets 212 and 222 are non-stretch sheets having substantially no stretch, and non-woven fabrics and the like that are soft sheets can be used. In the following description, the non-skin- side sheets 211, 221 and the skin- side sheets 212, 222 are collectively referred to as non-stretchable sheets.

The stretchable sheets 213, 223 are provided in the entire area below the waist elastic members 214, 224 in the front body part 21 and the back body part 22. Stretchable sheets 213 and 223 include stretchable nonwoven fabrics and stretchable films. Note that the stretchable sheets 213 and 223 may be stretchable not only in the horizontal direction but also in the vertical direction or other directions. In addition, the elastic sheets 213 and 223 are not limited to being covered with the non-elastic sheet from both the skin side and the non-skin side, and may be covered only from one side (that is, the outer body 20 is covered with the non-skin side). A configuration having only one of the side sheets 211 and 221 and the skin side sheets 212 and 222 may be used). Alternatively, one non-stretchable sheet may be folded vertically and the stretchable sheets 213 and 223 may be sandwiched therebetween.

As shown in FIGS. 4 and 5, in the front body part 21 and the back body part 22, the non-stretchable sheets 211, 221, 212, 222 and the stretchable sheets 213, 223 are intermittently joined by a plurality of joints 40. It is The joining method at the joining portion 40 includes joining by welding (thermal welding, ultrasonic welding, etc.) and joining by an adhesive. Although not shown, the joint portion 40 may be arranged in the crotch portion 23 or the joint portion 40 may not be arranged in the crotch portion 23 .

As shown in FIG. 7A, when the stretchable sheets 213 and 223 contract, the non-stretchable sheets 211, 221, 212 and 222 between the intermittently arranged joints 40 bend in the thickness direction (become convex). ). That is, a large number of small irregularities are formed on the surfaces of the front body part 21 and the back body part 22 . This improves the feel of the diaper 1 and gives the impression that the diaper 1 is visually soft. In particular, when the stretchable sheets 213 and 223 are stretchable nonwoven fabrics, the constituent fibers of the shrinkable stretchable sheets 213 and 223 swell in the thickness direction, and the fibers support the protrusions so that the protrusions are less likely to be crushed. The cushioning properties of the body part 21 and the back body part 22 are enhanced.

In addition, the plurality of joints 40 includes a plurality of types of joints 40 that differ from each other in at least one of shape and area. Specifically, the plurality of joints 40 includes a plurality of first joints 41 having the same shape and the same area (rectangular), and a plurality of second joints 42 having the same shape and the same area (circle). A plurality of third joints 43 having the same shape and the same area (rectangular) and a plurality of fourth joints 44 having the same shape and the same area (rectangular) are provided.

It should be noted that even if the directions of arrangement of the joints 40 are different, when they are rotated and overlapped (when they have the same shape), they have the same shape. Also, even if the shapes are of the same type (for example, rectangles or triangles), if they are not similar (for example, the side lengths, angles, etc. are different), they are treated as different shapes.

In the exterior body 20, a region where the plurality of first joints 41 are arranged is defined as a first joint region R1, a region where the plurality of second joints 42 are arranged is defined as a second joint region R2, and a plurality of second joints 41 are arranged. A region in which the three joints 43 are arranged is referred to as a third joint region R3, and a region in which a plurality of fourth joints 44 are arranged is referred to as a fourth joint region R4.

As a method for specifying the Nth junction region (N = 1 to 4), for each direction inclined in the range of 0 degrees to 180 degrees with respect to a predetermined direction (for example, the left and right direction), the outermost (one outer side or both The points of the N-th junction located on the outside) are specified, and the specified points are connected to form a region.

Specifically, in the front body part 21 and the back body part 22, a rectangular region above the absorbent core 12 (surrounded by points abcd between the waist elastic members 214, 224 and the leg elastic members 215, 225). The fourth junction region R4 is arranged in the region where the joint region R4 is formed. The second joint region R2 is arranged in a region below the fourth joint region R4 (the region surrounded by the point befghd). In addition, the first joint region R1 is arranged in a region that overlaps with the central portion of the second joint region R2 in the left-right direction. The first joint region R1 entirely overlaps with the second joint region R2 and is included in the second joint region R2. In addition, the third joint region R3 is arranged only in the back body portion 22, is a region that overlaps with the central portion of the second joint region R2 in the left-right direction, and is located below the first joint region R1. are distributed. The entirety of the third joint region R3 is also included in the second joint region R2.

The joints 40 are arranged in a staggered manner in each of the joint regions R1 to R4. In other words, the rows of joints 40 that are spaced apart in the vertical direction are aligned in the horizontal direction with a half-pitch shift in the vertical direction. In each of the joint regions R1 to R4, the arrangement intervals L0 and W0 of the joints 40 in the vertical and horizontal directions are constant. Furthermore, the arrangement intervals L0 and W0 of the joints 40 in all the joint regions R1 to R4 are uniform.

Also, the areas of the joints 40 are larger in the order of the third joint 43, the first joint 41, the fourth joint 44, and the second joint 42. Therefore, the area ratio of the joints 40 (the total area of the joints 40 located in the unit area/the unit area) is the third joint region R3, the first joint region R1, the fourth joint region R4, the second joint region It is larger in the order of the partial region R2.

The contractile force (elastic force) of the elastic sheets 213 and 223 in that area is reduced as the area ratio of the joint 40 increases. This is because the elastic properties disappear (reduce) at the portions of the elastic sheets 213 and 223 where the joints 40 are arranged, so that the greater the area ratio of the joints 40, the more elastic force is exhibited in the elastic sheets 213 and 223. This is because the area becomes smaller.

Therefore, by providing the fourth joint region R4 in which the area ratio of the joint 40 is relatively small on the upper side of the absorbent core 12, The contractile force of the portion 22) is kept moderate. Therefore, the outer body 20 fits the waist of the wearer.

In addition, by providing the single regions (both ends in the left-right direction) of the second joint regions R2 having a small area ratio of the joints 40 in the regions where the leg elastic members 215 and 225 are arranged, the leg elastic members 215 and 225 can be prevented from being reduced by the joining portion 40, and the contractile force of the stretchable sheets 213, 223 can also be appropriately maintained. Therefore, the outer body 20 fits around the wearer's legs.

On the other hand, in the overlap region OR1 between the first joint region R1 and the second joint region R2 (hereinafter also referred to as the first overlap region OR1), as shown in FIG. 6A, the first joint 41 and the second joint 42 is distributed. Therefore, in the first overlap region OR1, the area ratio of the joint portion 40 is increased, and the contractile force of the elastic sheets 213, 223 is reduced. Therefore, when the diaper 1 in the unfolded state is planarly viewed in its thickness direction, a second It is preferable to provide an overlapping region OR1 of the first joint region R1 and the second joint region R2.

By doing so, the shrinkage force of the elastic sheets 213 and 223 is reduced in the region of the outer body 20 overlapping the absorbent core 12 in the thickness direction, and the contraction of the absorbent core 12 in the left-right direction can be suppressed. As a result, the occurrence of gaps due to shrinkage wrinkles of the absorbent core 12 can be prevented, and the absorption area of the absorbent core 12 can be kept wide, so leakage of excrement can be suppressed. In addition, the user can feel the size of the absorbent core 12, and the user's anxiety about leakage can be reduced.

Also, the first joint portion 41 and the second joint portion 42 illustrated in FIG. 6A are different in shape and area. Specifically, the first joint portion 41 has a larger area than the second joint portion 42 . Further, the length L1 of the first joint 41 in the vertical direction of the diaper 1 is longer than the length d of the second joint 42, and the length W1 of the first joint 41 in the horizontal direction of the diaper 1 is the length of the second joint. greater than the length d of the portion 42;

Here, it is assumed that only the first joint 41 is arranged in the region of the outer body 20 that overlaps the absorbent core 12 in the thickness direction. By arranging many first joints 41 as shown in FIG. 7C , the area ratio of the joints 40 is increased, and contraction of the elastic sheets 213 and 223 can be suppressed. Further, according to the first joint portion 41 having a large area and size, the elastic properties of the elastic sheets 213 and 223 can be widely and surely lost, so that the contractile force of the elastic sheets 213 and 223 can be greatly reduced. However, by arranging many first joints 41 , the user tends to feel the hardness of the joints 40 , and the feel and wearing comfort of the diaper 1 deteriorate.

Conversely, assume that only the second joint 42 is arranged in the region of the outer body 20 that overlaps the absorbent core 12 in the thickness direction. In this case, the user will hardly feel the hardness of the joint 40, but there is a possibility that the elastic properties of the elastic sheets 213, 223 cannot be completely lost in the second joint 42 having a small area and size.

Further, when the area ratio of the joints 40 is the same, the number of joints 40 is reduced by arranging only the first joints 41 . When the number of joints 40 is small, as shown in FIG. 7B, the non-stretchable sheets 211, 221, 212, 222 between the first joints 41 flex more (the height of the protrusions). If large irregularities are formed on the surface of the outer body 20 overlapping the absorbent core 12 in the thickness direction, it becomes difficult to visually recognize the shape of the absorbent core 12 from the outside of the diaper 1 . In this case, the user cannot confirm the size of the absorbent core 12 and may feel uneasy about leakage. However, if the number of the first joints 41 is unnecessarily increased as shown in FIG. 7C in order to reduce the bending, the user tends to feel the hardness of the joints 40 .

On the other hand, when only the second joints 42 are arranged, the number of joints 40 increases. As a result, the number of bends (protrusions) of the non-stretchable sheets 211, 221, 212, 222 between the second joints 42 increases. If the surface of the outer body 20 overlapping the absorbent core 12 in the thickness direction is formed with many irregularities, it becomes difficult to visually recognize the shape of the absorbent core 12 from the outside of the diaper 1 . In this case, the user cannot confirm the size of the absorbent core 12 and may feel uneasy about leakage.

On the other hand, in the present embodiment, in the region of the outer body 20 overlapping the absorbent core 12 in the thickness direction, the first joint portion 41 and the second joint portion 42 having at least one of different shape and area are mixed. and placed (Fig. 6A). Therefore, the lateral contraction force of the elastic sheets 213 and 223 can be reliably suppressed by the first joint portion 41 having a large area and size, and the contraction of the absorbent core 12 in the lateral direction can be suppressed. In addition, the second joint portion 42 having a small area and size has a smaller effect of directly eliminating the elastic properties of the elastic sheets 213 and 223 than the first joint portion 41, but the elastic force of the elastic sheets 213 and 223 is small. The expression region can be divided by the second junction 42 . The contractile force of the stretchable sheets 213 and 223 can also be reduced by shortening the length of the elastic force expression regions continuing in the left-right direction.

Moreover, the bending (height of the convex portion) of the non-stretchable sheets 211, 221, 212, 222 between the first joints 41 can be reduced by the second joints 42, and the outer covering overlapping the absorbent core 12 in the thickness direction The unevenness of the surface of the body 20 is reduced. In addition, the number of joints 40 can be reduced by the first joints 41, and the number of irregularities on the surface of the outer casing 20 overlapping the absorbent core 12 in the thickness direction is reduced. Therefore, the visibility of the absorbent core 12 from the outside of the diaper 1 is enhanced, and the user can easily check the size of the absorbent core 12, thereby reducing anxiety about leakage. Further, since the number of the first joints 41 is not excessively increased in order to reduce the bending of the non-stretchable sheets 211, 221, 212, 222, the diaper 1 can be prevented from becoming stiff.

In addition, the non-stretchable sheets 211, 221, 212, and 222 between the joints 40 are less flexed (the height of the convex portion), so that the non-stretchable sheets are The angles of 211, 221, 212 and 222 are reduced. As a result, the resistance of the non-stretchable sheets 211, 221, 212, 222 against the shrinkage force of the stretchable sheets 213, 223 is increased, and the shrinkage force of the stretchable sheets 213, 223 can be further reduced.

It should be noted that at least a part of the outer body 20 that overlaps the absorbent core 12 in the thickness direction should be provided with the first overlapping region OR1. For example, only one of the front body portion 21 and the back body portion 22 may be provided with the first overlapping region OR1, or the crotch portion 23 may be provided with the first overlapping region OR1. Also, three or more types of joint portions 40 having different shapes and areas may be arranged in the first overlap region OR1.

Also, the joint 40 is not limited to those illustrated in FIGS. For example, joint 40 may have a shape other than rectangular or circular. Also, the joints 40 may not be arranged at equal intervals in the vertical and horizontal directions (or may be arranged unevenly), and may not be arranged in a zigzag pattern. Also, the arrangement intervals of the joints 40 may differ among the joint regions R1 to R4.

Also, the first joint portion 41 and the second joint portion 42 are different in at least one of the shape and the area, but the first joint portion 41 is more likely to be attached to the diaper 1 than the second joint portion 42 is. It is preferable that the length in the vertical direction is long (L1>d). By doing so, the contractile force of the elastic sheets 213 and 223 can be reduced over a wide range in the vertical direction by the first joint portion 41 that is long in the vertical direction.

Also, it is preferable that the first joint portion 41 has a larger area than the second joint portion 42 . By doing so, the elastic properties of the elastic sheets 213 and 223 can be more reliably eliminated by the large-area first joint portion 41, and the contractile force of the elastic sheets 213 and 223 can be reduced.

Also, the first joint portion 41 may be longer in the lateral direction of the diaper 1 than the second joint portion 42 (W1>d). By doing so, the length of the elastic force expression region in the elastic sheets 213 and 223 in the horizontal direction can be shortened by the first joint portion 41 that is long in the horizontal direction, and the contractile force of the elastic sheets 213 and 223 in the horizontal direction can be reduced. can be reduced.

However, if the vertical length of the first joints 41 is equal to or greater than the horizontal length, a large number of first joints 41 can be arranged side by side in the horizontal direction. In this case, the elastic force expression regions of the elastic sheets 213 and 223 can be finely divided in the left-right direction, and the contractile force of the elastic sheets 213 and 223 can be reduced.

Note that when comparing the dimensions and areas of the joints 40 as described above, and when comparing the positional relationship of the joints 40 and the areas of the regions described below, the diaper 1 is stretched. and

In the first overlap region OR1 illustrated in FIG. 6A , the second joint portion 42 is positioned in the center of the first joint portions 41 aligned in the vertical direction, and the second joint portion 42 is located in the center of the first joint portions 41 aligned in the horizontal direction. is located. The vertical position of a part of the first joint portion 41 and the vertical position of the second joint portion 42 overlap, and the first joint portion 41 and the second joint portion 42 are arranged in the horizontal direction. columns are formed.

In this way, at least a portion of the first joint portion 41 and the second joint portion 42 arranged in the first overlap region OR1 may overlap each other at least partially in the vertical direction. By doing so, the bending of the non-stretchable sheets 211, 221, 212, and 222 occurring between the first joints 41 arranged in the horizontal direction can be directly suppressed by the second joints 42, and the bending can be reduced. Therefore, the unevenness of the surface of the outer body 20 that overlaps the absorbent core 21 in the thickness direction can be reduced, and the user can easily confirm the size of the absorbent core 12 . In particular, as shown in FIG. 6A, by arranging the second joint portion 42 in the center of the first joint portions 41 arranged in the left-right direction, the bending of both sides of the second joint portion 42 in the left-right direction can be uniformly reduced.

8A to 8C are diagrams showing modifications of the arrangement of the first joint portion 41 and the second joint portion 42 in the first overlap region OR1. Unlike FIG. 6A, as shown in FIG. 8A, at least some of the first joint portions 41 and the second joint portions 42 arranged in the first overlap region OR1 are arranged so that their positions in the vertical direction do not overlap. may

By doing so, the contractile force of the elastic sheets 213 and 223 can be suppressed over a wide range in the vertical direction by the first joint portion 41 and the second joint portion 42 that are displaced in the vertical direction. Further, in the case of FIG. 8A as well, the bending of the non-elastic sheets 211 , 221 , 212 , 222 occurring between the first joints 41 can be reduced by the second joints 42 . In addition, in FIG. 8A, since the first joint portion 41 and the second joint portion 42 are not aligned in the horizontal direction, the contractile force of the elastic sheets 213 and 223 is locally reduced at specific positions in the vertical direction, It can be suppressed that it becomes hard.

Moreover, when the diaper 1 in the unfolded state is viewed in plan in the thickness direction, as shown in FIG. The portion 42 may partially overlap with each other in the thickness direction.

In this case, the elastic properties of the stretchable sheets 213 and 223 can be more reliably eliminated by the portion where the first joint portion 41 and the second joint portion 42 overlap, and the contractile force of the stretchable sheets 213 and 223 can be reduced. can be reduced. On the other hand, the non-stretchable sheets 211, 221, 212, and 222 can be restrained from bending due to portions where the first joint portion 41 and the second joint portion 42 do not overlap each other.

Further, as shown in FIG. 8C, the joint portions 40 arranged in order from one side in the left-right direction in the first overlap region OR1 are divided into one first joint portion 41a, one second joint portion 42a, and another first joint portion. 41b. In this case, one first joint portion 41a may be arranged closer to one second joint portion 42a than the other first joint portion 41b in the left-right direction. That is, the center-to-center distance W3 between one first joint portion 41a and one second joint portion 42a is made shorter than the center-to-center distance W4 between one second joint portion 42a and another first joint portion 41b.

By doing so, the bending of the non-stretchable sheets 211, 221, 212, 222 between the first joint portion 41a and the second joint portion 42a that are arranged close to each other becomes smaller, and the bending is less likely to be recognized by the user. Become. Therefore, on the surface of the outer body 20 where the absorbent core 12 overlaps in the thickness direction, the number of irregularities easily recognized by the user can be reduced, and the user can easily confirm the size of the absorbent core 12. - 特許庁

Further, as shown in FIG. 2, in the outer body 20 on at least one side in the front-rear direction (in the present embodiment, in the back body portion 22), a pair of curved regions 20C along the pair of leg openings 1b of the diaper 1, When the leg elastic members 225 are arranged in the central region 20D along the left-right direction connecting the pair of curved regions 20C, the following is preferable.

First, as shown in FIG. 5, when the diaper 1 in the unfolded state is viewed from above in the thickness direction, the outer body 20 has the central region 20D and the absorbent core 12 overlapped in the thickness direction. It is preferable to have a region OR2 where the second joint region R2 and the third joint region R3 overlap (hereinafter also referred to as a second overlapping region OR2). The third joint portion 43 has a longer length in the horizontal direction (W2>W1), a longer length in the vertical direction (L2>L1), and a larger area than the first joint portion 41. At least one of the larger requirements should be satisfied (the third joint 43 of the present embodiment satisfies all).

By doing so, in addition to the stretchable sheets 213 and 223, in the region (central region 20D) of the outer body 20 where the leg elastic members 225 crossing the absorbent core 12 in the left-right direction are arranged, the joint portion 40 is The area ratio can be increased. That is, the contractile force of the stretchable sheets 213 and 223 and the leg elastic members 225 can be significantly reduced more reliably by the third joints 43 having a size and area larger than those of the first joints 41 . Specifically, the leg elastic members 225 can be finely divided in the left-right direction by the third joints 43 , and the contractile force of the leg elastic members 225 can be reduced. Thereby, contraction of the absorbent core 12 can be suppressed.

Note that a configuration in which a plurality of types of joints 40 are not arranged in the region of the exterior body 20 other than the central region 20D may be employed. Applicable.

Also, the first joint portion 41 and the second joint portion 42 may be arranged in the central region 20D as well as in the first overlapping region OR1. In that case, it is preferable to increase the number of joints 40 per unit area. By doing so, the contractile force of the elastic sheets 213 and 223 and the leg elastic members 225 can be reduced more reliably.

Further, as shown in FIG. 4, the leg elastic members 215 arranged on the front body portion 21 are provided only in the curved region along the leg openings 1b of the outer body 20, and the absorbent core 12 is arranged in the lateral direction. do not cross. Therefore, contraction of the absorbent core 12 in the lateral direction is suppressed. In addition, the leg elastic members 215 are arranged from the side joints 24 toward the lower end of the front body portion 21, but the lower end of the leg elastic members 215 may not exhibit elastic characteristics or may not be elastic. It is preferable that the leg elastic member 215 does not reach the lower end of the portion 21 . By doing so, it is possible to prevent the lower end portion of the front body portion 21 from being turned over or the like.

Also, when the diaper 1 in the unfolded state is viewed in plan in the thickness direction, the region of the outer covering 20 overlapping the upper end portion 12A of the absorbent core 12 in the thickness direction is defined as an end region 20E. It is preferable that the first overlap region OR1 where the first joint region R1 and the second joint region R2 overlap is not arranged in the end region 20E. Then, the area ratio of the joints 40 in the end region 20E is preferably smaller than the area ratio of the joints 40 in the first overlapping region OR1. That is, the value obtained by dividing the total area of the joints 40 arranged in the end region 20E by the area of the end region 20E is calculated as the total area of the joints 40 arranged in the first overlap region OR1. It should be smaller than the value divided by the area of the region OR1.

By doing so, the shrinkage force of the elastic sheets 213 and 223 is reduced at the boundary between the region of the outer body 20 that overlaps with the absorbent core 12 and the region of the outer body 20 that does not overlap with the absorbent core 12 in the thickness direction. Sudden changes can be suppressed. Therefore, twisting or the like of the exterior body 20 at the boundary portion can be suppressed.

9A to 9F are explanatory diagrams of the joint 40 having a shape with a long axis direction. It is preferable that the plurality of joints 40 arranged in the exterior body 20 have a shape having a long axis direction. In this embodiment, the first, third, and fourth joint portions 41, 43, and 44 are rectangular and have a longitudinal direction.

Shapes having a longitudinal direction include rectangles (FIG. 9A), substantially rectangles (for example, rectangles with curved sides as shown in FIG. 9B, rectangles with rounded corners as shown in FIG. 9C, etc.), parallel A quadrilateral (FIG. 9D), an ellipse (FIG. 9E), and a rhombus (FIG. 9F) are exemplified. As shown in the figure, for rectangles, substantially rectangles, parallelograms, and ellipses, the long axis direction is the direction of a straight line connecting the centers of opposing short sides (curves). The major axis of the rhombus is the direction along the longer diagonal.

When the joint portion 40 has a shape having a long axis direction as described above, the joint portion 40 is preferably arranged such that the long axis direction is inclined with respect to the vertical direction and the horizontal direction. For example, the first joint portion 41 of the present embodiment is arranged with its longitudinal direction inclined by 45 degrees with respect to the vertical direction and the horizontal direction.

By doing so, since the long axis direction of the highly rigid joint 40 does not extend along the longitudinal direction and the width direction, the rigidity in the vertical direction and the rigidity in the horizontal direction of the exterior body 20 can be reduced. Therefore, the outer body 20 is easily deformed along the wearer's waist and vertical bulges (abdomen and buttocks), and the wearer hardly feels the hardness of the diaper 1 .

In addition, when the long axis direction of the joint 40 arranged in the region of the outer body 20 overlapping the absorbent core 12 is inclined, the vertical direction of the joint 40 is greater than when the long axis direction is along the left-right direction. becomes longer. Therefore, the contractile force of the elastic sheets 213 and 223 can be reduced over a wide range in the vertical direction by the joint portion 40 . In addition, since the length of the joint 40 in the left-right direction is moderately shortened, many joints 40 can be arranged side by side in the left-right direction. Therefore, the elastic force expression regions of the elastic sheets 213 and 223 can be finely divided in the left-right direction, and the contractile force of the elastic sheets 213 and 223 can be reduced. On the other hand, compared to the case where the long axis direction is along the vertical direction, the length of the joint 40 in the left-right direction is longer, so the length of the elastic force expression region in the elastic sheets 213, 223 in the left-right direction can be shortened. The contractile force of the elastic sheets 213, 223 can be reduced. When the long axis direction of the joint portion 40 is inclined in this way, the area of the joint portion 40 can be reduced while obtaining the effects of both the case where the joint portion 40 is long in the vertical direction and the case where the joint portion 40 is long in the horizontal direction. It is possible to prevent the diaper 1 from becoming hard.

Also, joints with different inclinations in the longitudinal direction should be mixed and arranged. In FIGS. 4 and 5, the joints 40 whose inclinations are left-right symmetrical are arranged between the joints 40 arranged along the longitudinal direction. By doing so, the contractile force distribution of the elastic sheet 213 can be symmetrical, so that the appearance of the diaper 1 can be improved and the tightening force can be well balanced.

FIG. 10 is a diagram showing a modification of the joint 40 arranged on the diaper 1. FIG. Even if the fifth joint region R5 having a higher area ratio of the joint 40 than the second joint region R2 is arranged in the region of the exterior body 20 aligned in the left-right direction with the first overlap region OR1 and the second overlap region OR2, good. In the fifth joint region R5 illustrated in FIG. 10, the area ratio of the joints 40 is increased by increasing the number of the second joints 42 arranged per unit area compared to the second joint region R2. is doing. However, not limited to this, a plurality of types of joints 40 may be arranged in the fifth joint region R5.

In FIG. 10 , shrinkage of the regions of the outer body 20 on both lateral sides of the absorbent core 12 is also suppressed, so that the outer body 20 spreads in the left and right direction, and the buttocks and the front crotch part are covered by the outer body 20. Can be coated. Moreover, the appearance like the diaper 1 is reduced. However, in the fifth joint region R5, the area ratio of the joint 40 is made lower than in the first overlapping region OR1 and the second overlapping region OR2. By doing so, the contractile force of the exterior body 20 is appropriately maintained, and the exterior body 20 can fit the wearer's buttocks and the like.

11A and 11B are explanatory diagrams of the first overlap region OR1 in a group of diapers 1 having different sizes. The diaper 1 may be marketed as a group of diapers 1 of a plurality of sizes (for example, S size, M size, L size, etc.). By doing so, the wearer can wear the diaper 1 according to the size of the body. In that case, a group of diapers 1 having a plurality of sizes may be marketed under the same brand name and sub-brand name. By doing so, the user can select the desired diaper 1 .

Note that the same brand name is information (for example, "Lifree", etc.) representing the brand of the product group (incontinence care products) that includes the diaper 1. The same sub-brand name is information representing the names of different products (pants-type diapers, pads, etc.) within the same brand (for example, "refreshing style pants").

In the group of diapers 1 illustrated in FIG. 11A, the first size diaper 1 (for example, M size diaper 1, first pants-type absorbent article) and the second size diaper 1 (for example, L size) diaper 1 and second pants-type absorbent article), the total area of the outer body 20 is different, but the area of the first overlap region OR1 is the same (or substantially the same). Therefore, in diapers 1 of different sizes, the area ratio of the first overlapping region OR1 in the outer body 20 (the value obtained by dividing the area of the first overlapping region OR1 by the total area of the outer body 20) is different, and the large size ( L size) has a smaller area ratio.

By doing so, when the size of the absorbent core 12 is the same (or substantially the same) even if the outer body 20 is large in the large size, the first overlapping region OR1 is formed with respect to the absorbent core 12. It doesn't grow unnecessarily. Therefore, it is possible to prevent the shrinkage force of the elastic sheets 213 and 223 from being excessively reduced. Conversely, when the size of the absorbent core 12 is the same (or substantially the same) even though the outer packaging 20 is smaller, the first overlapping region OR1 may be unnecessarily small with respect to the absorbent core 12. There is no Therefore, the contractile force of the elastic sheets 213, 223 overlapping the absorbent core 12 can be reduced. That is, regardless of the area of the outer body 20, the contraction force of the region of the outer body 20 according to the size of the absorbent core 12 can be reduced, and the unevenness of the surface of the outer body 20 overlapping the absorbent core 12 can be reduced. can be made smaller.

The total area of the outer packaging 20 is the planar area of the outer packaging 20 in the diaper 1 in the unfolded and stretched state as shown in FIG. Further, when the diaper 1 is provided with a plurality of the first overlapping regions OR1, such as when the front body portion 21 and the back body portion 22 are each provided with the first overlapping regions OR1, the area ratio based on the total area and the do.

However, not limited to the above, as shown in FIG. can be increased. By doing so, even when the size of the absorbent core 12 changes according to the size of the diaper 1, the contractile force of the region of the outer body 20 corresponding to the size of the absorbent core 12 can be reduced. In addition, it is possible to prevent the shrinkage of the outer body 20 from being unnecessarily reduced in the diaper 1 of a small size.

Although the embodiments of the present invention have been described above, the above embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. Further, the present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

1 diaper (pants-type absorbent article), 2, 3 inner layer sheet,
10 absorbent body,
11 topsheet, 12 absorbent core, 13 backsheet,
20 exterior body, 20C curved region, 20D central region,
21 front body part, 22 back body part, 23 crotch part,
211 non-skin side sheet (non-elastic sheet),
212 skin side sheet (non-elastic sheet),
213 elastic sheet,
214 waist elastic member, 215 leg elastic member,
221 non-skin side sheet (non-elastic sheet),
222 skin side sheet (non-elastic sheet),
223 elastic sheet,
224 waist elastic member, 225 leg elastic member,
24 side joints,
40 junctions,
41 first joint, 42 second joint,
43 third joint (first joint), 44 fourth joint,
R1 first joint region, R2 second joint region,
R3 third joint region (first joint region), R4 fourth joint region,

Claims (12)

1. having an up-down direction, a left-right direction, and a front-back direction,
   A pants-type absorbent article having an absorbent main body provided with an absorbent core and an exterior body arranged on the non-skin side of the absorbent main body,
   The exterior body includes a non-stretchable sheet and a stretchable sheet that stretches in the left-right direction,
   The non-stretchable sheet and the stretchable sheet are intermittently joined by a plurality of joints,
   The plurality of joints includes a plurality of first joints having the same shape and the same area and a plurality of second joints having the same shape and the same area,
   At least one of a shape and an area is different between the first joint portion and the second joint portion,
   The exterior body includes a first joint region in which a plurality of the first joints are arranged and a second joint region in which a plurality of the second joints are arranged,
   When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body includes the first joint region and the A pants-type absorbent article characterized by having a region that overlaps with a second joint region.
2. The pants-type absorbent article according to claim 1,
   The underpants-type absorbent article, wherein the first joint portion is longer in the vertical direction than the second joint portion.
3. The pants-type absorbent article according to claim 1 or 2,
   The underpants-type absorbent article, wherein the first joint portion has a larger area than the second joint portion.
4. The pants-type absorbent article according to any one of claims 1 to 3,
   At least a portion of the first joint portion and the second joint portion arranged in the overlapping region overlap each other in at least a portion of the position in the vertical direction. absorbent article.
5. The pants-type absorbent article according to any one of claims 1 to 3,
   The underpants-type absorbent article, wherein at least some of the first joints and the second joints arranged in the overlapping region do not overlap in position in the vertical direction.
6. The pants-type absorbent article according to any one of claims 1 to 5,
   When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction,
   At least some of the first joints and the second joints arranged in the overlapping region partially overlap with each other in the thickness direction. .
7. The pants-type absorbent article according to any one of claims 1 to 6,
   In the overlapping region, one first joint portion, one second joint portion, and another first joint portion are arranged in order from one side in the left-right direction, and
   The underpants-type absorbent article, wherein the one first joint is arranged closer to the one second joint than the other first joint in the lateral direction.
8. The pants-type absorbent article according to any one of claims 1 to 7,
   wherein the plurality of joints have a shape having a longitudinal direction,
   The underpants-type absorbent article, wherein the joint portion is arranged such that the long axis direction is inclined with respect to the vertical direction and the horizontal direction.
9. The pants-type absorbent article according to any one of claims 1 to 8,
   The leg elastic members arranged on at least one side of the exterior body in the front-rear direction connect a pair of curved regions along a pair of leg openings of the pants-type absorbent article with the pair of curved regions. arranged in the central region along the left-right direction,
   The plurality of joints comprises a plurality of third joints having the same shape and the same area,
   the third joint differs from the first joint and the second joint in at least one of shape and area;
   The third joint satisfies at least one of a longer length in the horizontal direction, a longer length in the vertical direction, and a larger area than the first joint. ,
   The exterior body includes a third joint region in which a plurality of the third joints are arranged,
   When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body includes the second joint in the region where the central region and the absorbent core overlap in the thickness direction. A pants-type absorbent article, characterized in that it has a region in which a part region and the third joint region overlap each other.
10. The pants-type absorbent article according to any one of claims 1 to 9,
    When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body has an end region overlapping the upper end of the absorbent core in the thickness direction,
    A value obtained by dividing the total area of the joints arranged in the end region by the area of the end region is the area where the first joint region and the second joint region overlap. The underpants-type absorbent article, wherein the total area of the joints that overlap each other is smaller than a value obtained by dividing the area of the overlapping regions.
11. The pants-type absorbent article according to any one of claims 1 to 10,
    The pants-type absorbent article is of a first size,
    The value obtained by dividing the area of the region where the first joint region and the second joint region overlap by the total area of the outer package is the same brand name and sub-brand name as the pants-type absorbent article. and is different from the divided value in other pants-type absorbent articles of the second size.
12. a first pant-type absorbent article of a first size;
    a second pant-type absorbent article of a second size;
    The first pants-type absorbent article and the second pants-type absorbent article are a group of pants-type absorbent articles having the same brand name and sub-brand name,
    The first pants-type absorbent article and the second pants-type absorbent article each comprise:
    having an up-down direction, a left-right direction, and a front-back direction,
    An absorbent body having an absorbent core and an exterior body disposed on the non-skin side of the absorbent body,
    The exterior body includes a non-stretchable sheet and a stretchable sheet that stretches in the left-right direction,
    The non-stretchable sheet and the stretchable sheet are intermittently joined by a plurality of joints,
    The plurality of joints includes a plurality of first joints having the same shape and the same area and a plurality of second joints having the same shape and the same area,
    At least one of a shape and an area is different between the first joint portion and the second joint portion,
    The exterior body includes a first joint region in which a plurality of the first joints are arranged and a second joint region in which a plurality of the second joints are arranged,
    When the pants-type absorbent article in the unfolded state is viewed from above in the thickness direction, the outer body includes the first joint region and the Having a region that overlaps with the second joint region,
    The value obtained by dividing the area of the region where the first joint region and the second joint region overlap by the area of the entire outer package is the value of the first pants-type absorbent article and the second pants-type absorbent article. A group of pant-type absorbent articles characterized in that they differ from type absorbent articles.

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