Pants-type absorbent article

Abstract

Provided is a pants-type absorbent article (1) having an absorbent body (10), a waist member (20), an engagement member (30), and a crotch elastic member (50), wherein: the engagement member (30) has a convex shape from the outside toward the inside in the left-right direction; the maximum length of the engagement member (30) in the up-down direction is shorter than the length of a side joining part (40) and is longer than the 1 / 2 of the length of the side joining part (40); the engagement member (30) has an engagement part (32) provided with a plurality of hooks (325), and a base material sheet (31); a plurality of compressed parts (71) are provided on the surface of the base material sheet (31) facing the engagement part (32); the hooks (325) and the compressed parts (71) have overlapping portions; the outer edge of the engagement member (30) has a curved shape; and the upper end edge or the lower end edge of the engagement part (32) and the upper end edge or the lower end edge of the engagement member (30) are located at the same position.

Description

Pant-type absorbent article 【0001】 The present invention relates to a pant-type absorbent article. 【0002】 Conventionally, there are known absorbent articles such as disposable diapers that can also be used as a tape type (deployable type) by separating a part of the waist member formed as a pant type (short type). For example, Patent Document 1 discloses a pant-type absorbent article having a pair of separation parts for separating the waist member into a front body part and a back body part, provided on one side of the front body part and the back body part, and having a locking part (engagement member) removably locked to the other side of the front body part and the back body part. 【0003】 International Publication No. 2022 / 4727 【0004】 When using such an absorbent article as a tape type, if the engagement member (tab, tape, etc.) is large, there is a risk that it may protrude from the waist member during engagement and rub against the wearer's body or interfere with the movement of the body. On the other hand, if the engagement member is small, there is a risk that local force acts when grasping and pulling the engagement member during the wearing operation, causing the waist member to twist. That is, there is a risk that the operability of the engagement operation and the fit during wearing may deteriorate. Also, in the operation of engaging and detaching the engagement member with the waist member, if the engagement force of the engagement part (mechanical fastener, etc.) with respect to the waist member is too strong, there is a risk that the engagement part may disengage from the engagement member. 【0005】 The present invention has been made in view of the above problems, and its object is to improve the operability and fit when engaging and detaching an engagement member with a waist member in a pant-type absorbent article that can also be used as a tape type. 【0006】The main invention for achieving the above objective is a pant-type absorbent article comprising: an absorbent body having an absorbent core that absorbs liquid and having intersecting vertical, horizontal, and thickness directions; a waist member having a front waist portion and a rear waist portion; an engaging member whose outer end in the horizontal direction is irremovably fixed to the waist member and whose inner end is removably engaged with the non-skin side of the waist member; and a crotch elastic member provided on the non-skin side of the absorbent core and stretching along the vertical direction, wherein the front waist portion and the rear waist portion are joined to each other at both ends in the horizontal direction by a pair of side joints, the engaging member having a convex shape that protrudes in a convex shape at only one point from the outside to the inside in the horizontal direction, and in the vertical direction, the engaging The maximum length of the member is shorter than the length of the side joint and longer than half the length of the side joint; the engaging member has an engaging portion with a plurality of hooks and a base sheet that supports the engaging portion; the surface of the base sheet facing the engaging portion in the thickness direction is provided with a plurality of compression portions that compress the base sheet in the thickness direction, and has a portion where the hooks and the compression portions overlap when viewed in the thickness direction; the outer edge of the engaging member is curved inward in the left-right direction from the engaging portion; and in the up-down direction, the upper edge of the engaging portion and the upper edge of the engaging member are at the same position or the lower edge of the engaging portion and the lower edge of the engaging member are at the same position. These are the characteristics of the pants-type absorbent article. Other features of the present invention will be made clear by description in this specification and the accompanying drawings. 【0007】 According to the present invention, in a pant-type absorbent article that can also be used as a tape, it is possible to improve the operability and fit when engaging or detaching the engaging member from the waist member. 【0008】Figure 2 is a schematic perspective view of napkin 1. Figure 3 is a plan view of napkin 1 in an open and extended state, viewed from the thickness direction. Figure 4 is a schematic cross-sectional view of A-A in Figure 2. Figures 5A and 5B are plan and cross-sectional views of the absorbent body 10 in an extended state. Figure 5A is a plan view of the engaging member 30 in an extended state, and Figure 5B is a cross-sectional view of the engaging member 30 in an extended state. Figure 5B is a schematic cross-sectional view showing an enlarged view of region X. Figures 7A and 7B illustrate the operation of separating the waist member 20 of napkin 1 into front and back sections. Figure 7 is an example illustrating the operation of wearing napkin 1. Figure 7 is an illustration illustrating the mechanism of engagement between the waist member 20 and the engaging member 30 (engaging portion 32). Figures 10A and 10B illustrate the relationship between the pitch of the first base material sheet compression section 71 and the pitch of the hook 325. Figures 11A and 11B illustrate the relationship between the depth of the first base material sheet compression section 71 and the height of the hook 325. Figures 12A and 12B illustrate the folding guide lines 37 provided on the engaging member 30. This is a plan view showing an example of a napkin 1 having an asymmetrical shape with respect to the central position C-C in the left-right direction. This is a diagram illustrating an example of the configuration of the perforations 25 (separation section 25). This is a diagram illustrating the cross-sectional structure of the body member 20 of the napkin 2. 【0009】 The following matters become clear from this specification and the accompanying drawings: 【0010】(Aspect 1) A pant-type absorbent article comprising: an absorbent body having an absorbent core that absorbs liquid and having intersecting vertical, horizontal, and thickness directions; a waist member having a front waist portion and a rear waist portion; an engaging member whose outer end in the horizontal direction is irremovably fixed to the waist member and whose inner end is removably engaged with the non-skin side of the waist member; and a crotch elastic member provided on the non-skin side of the absorbent core and which expands and contracts along the vertical direction, wherein the front waist portion and the rear waist portion are joined to each other at both ends in the horizontal direction by a pair of side joints, the engaging member having a convex shape that protrudes in a convex shape at only one point from the outside to the inside in the horizontal direction, and the maximum length of the engaging member in the vertical direction is A pant-type absorbent article characterized in that, the length is shorter than the length of the side joint and longer than half the length of the side joint, the engaging member has an engaging portion with a plurality of hooks and a base sheet that supports the engaging portion, the surface of the base sheet facing the engaging portion in the thickness direction is provided with a plurality of compression portions that compress the base sheet in the thickness direction, and when viewed in the thickness direction, there is a portion in which the hooks and the compression portions overlap, the outer edge of the engaging member is curved inward in the left-right direction from the engaging portion, and in the up-down direction, the upper edge of the engaging portion and the upper edge of the engaging member are at the same position or the lower edge of the engaging portion and the lower edge of the engaging member are at the same position. 【0011】According to the pant-type absorbent article of Embodiment 1, when used as a tape-type absorbent article, when gripping the engaging member and pulling up the waist member during the putting-on operation, the elasticity of the crotch elastic member makes it easier to pull the absorbent body upward, making it easier to fit to the crotch area. At that time, since there is a protrusion at only one point on the inner end of the engaging member in the left-right direction, it is easy to grip the engaging member and the force pulling the engaging member is easily transmitted to the waist member. Furthermore, since the engaging member is neither too long nor too short in the vertical direction compared to the waist member (side joint), when engaging the engaging member, it is suppressed that it will protrude from the waist member or that the waist member will twist, improving operability and fit. In addition, in the engaging member, the force pressing the hook against the waist member is reduced in the part where the hook and the compression part overlap (the hook engagement becomes shallower). Therefore, when peeling the engaging member from the waist member, it is suppressed that the engaging part (hook) will detach from the base sheet of the engaging member and only the engaging part will remain on the waist member. Furthermore, the curved shape of the outer edge (contour) of the engaging member on the inside in the left-right direction from the engaging portion makes it less likely to cause discomfort to women during menstruation and improves the degree of comfort when grasped by hand. In addition, at least one edge of the engaging portion and at least one edge of the engaging member (base sheet) are in the same position in the vertical direction. That is, because the engaging portion extends to at least one side of the upper or lower end of the engaging member, the rigidity of the engaging member is increased, making it easier to prevent the engaging member from bending when worn. 【0012】 (Aspect 2) The pant-type absorbent article according to aspect 1, wherein the area of ​​the compression portion is larger than the area of ​​the hook when viewed in the thickness direction. 【0013】In the pant-type absorbent article of embodiment 2, when engaging the engaging member, some of the hooks enter into recesses in the compression section (first base sheet compression section), making it less likely for them to get caught on the fibers of the waist member, thus preventing the engaging force from becoming excessively strong. Furthermore, when the engaging member undergoes bending deformation with the compression section (first base sheet compression section) as the bending point during the engaging operation, this bending deformation is less likely to be interfered with by the hooks. Therefore, the engaging member can be easily deformed in three dimensions, improving operability when engaging or detaching the engaging member from the curved surface of the waist member. 【0014】 (Aspect 3) The pants-type absorbent article according to aspect 1 or 2, wherein in the vertical direction, the distance between the upper end of the waist member and the upper end of the engaging member, or the distance between the lower end of the waist member and the lower end of the engaging member, is greater than the pitch of the compression portion. 【0015】 According to the absorbent pants of embodiment 3, the distance between the upper (lower) end of the waistband member and the upper (lower) end of the engaging member can be easily recognized by the user by comparing it with the pitch of the compression portion visible on the surface of the engaging member. As a result, when wearing the absorbent pants, it becomes easier to recall that the body is securely covered by the front waistband, which can give the user a good fit and a sense of security. 【0016】 (Aspect 4) The pants-type absorbent article according to any one of aspects 1 to 3, wherein at the outer end of the waist member in the left-right direction, the distance between the upper end of the waist member and the upper end of the engaging member is greater than the pitch of the compression portion. 【0017】 According to the pant-type absorbent article of embodiment 4, when worn, the portion forming the waist opening at the upper end of the front waist area makes it easier to firmly cover the wearer's abdomen, thus improving the fit around the waist. 【0018】(Aspect 5) The pants-type absorbent article according to any one of aspects 1 to 4, wherein at the outer end of the waist member in the left-right direction, the distance between the lower end of the waist member and the lower end of the engaging member is greater than the pitch of the compression portion. 【0019】 According to the pant-type absorbent article of embodiment 5, when worn, the portion forming the leg opening at the lower end of the front waist area can more easily cover the wearer's legs, thereby improving the fit around the legs. 【0020】 (Aspect 6) The pants-type absorbent article according to any one of aspects 1 to 5, wherein the pitch of the compression portion is greater than the pitch of the hook in the vertical and horizontal directions. 【0021】 In the pant-type absorbent article of embodiment 6, there is a high probability that multiple hooks will be positioned between adjacent compression sections in the vertical and horizontal directions, resulting in a stronger engagement force. On the other hand, since the hooks are less likely to be pressed in areas that overlap with the compression sections, excessive engagement force is suppressed. Therefore, the engagement force of the engagement members can be easily adjusted to an appropriate strength, and the operability when attaching and detaching the engagement members can be improved compared to the opposite case. 【0022】 (Aspect 7) The pant-type absorbent article according to any one of aspects 1 to 6, wherein the average depth of the compression section is greater than the average height of the hook. 【0023】 In the pant-type absorbent article of embodiment 7, at the position where the hook and the compression part overlap, when the hook is pressed, the entire hook does not protrude from the recess of the compression part, making it less likely to get caught on the fibers of the nonwoven fabric constituting the waistband member, thus suppressing excessive engagement force. Therefore, the engagement force of the engagement member can be easily adjusted to an appropriate strength, and the operability when attaching and detaching the engagement member can be improved compared to the opposite case. 【0024】(Aspect 8) The waistband member comprises, in the region that engages with the engaging member, a first sheet provided on the non-skin side in the thickness direction, a second sheet provided on the skin side in the thickness direction, and a third sheet sandwiched between the first sheet and the second sheet, wherein a waistband elastic member that expands and contracts in the left-right direction is provided between the second sheet and the third sheet, and the waistband elastic member is not provided between the first sheet and the third sheet, the pant-type absorbent article according to any one of aspects 1 to 7. 【0025】 In the pant-type absorbent article of embodiment 8, a third sheet is provided between the first sheet and the waist elastic member in the thickness direction. As a result, the third sheet functions like an interference member, and the effect of the hooks pressed against the first sheet from the non-skin side toward the skin side is less likely to reach the waist elastic member between the second sheet and the third sheet. This makes it easier to maintain the elasticity of the waist elastic member even when the engagement member is repeatedly engaged and disengaged, thereby improving the fit of the waist member. 【0026】 (Aspect 9) The pant-type absorbent article according to any one of aspects 1 to 8, wherein the first sheet and the third sheet have portions that are joined to each other and portions that are not joined to each other. 【0027】 According to the pant-type absorbent article of embodiment 9, when engaging or disengaging the engaging member from the non-skin side of the waist member, the non-jointed portion between the first sheet and the third sheet functions as a cushion, making it less likely for the effects of putting on and taking off to affect the waist elastic member. As a result, even when the engagement and disengaging of the engaging member is repeated, the elasticity of the waist elastic member is more easily maintained, and the fit of the waist member can be further improved. 【0028】 (Aspect 10) The pants-type absorbent article according to any one of aspects 1 to 9, wherein the engaging member has a folding guide line between the engaging portion and the side joint portion in the left-right direction, which causes the base sheet to be folded so that it is convex on the non-skin side in the thickness direction. 【0029】According to the absorbent pant-type article of embodiment 10, a folding guide line is provided that folds the pant so that it is convex on the non-skin side. This makes it easier to form a space between the folded engaging member and the waistband member, making it easier for the wearer to see the engaging member. Furthermore, inserting a finger into this space makes it easier to pull the engaging member away. This makes it easier to put on the absorbent pant-type article. 【0030】 (Aspect 11) The front waist portion has a waist elastic member that expands and contracts in the left-right direction, and the waist elastic member has a discontinuous portion in the waist elastic member where it is discontinuous in the left-right direction, in the portion where the waist elastic member and the engaging member overlap in the up-down direction and in the central portion in the left-right direction. This is the pant-type absorbent article according to any one of aspects 1 to 10. 【0031】 In the pant-type absorbent article of embodiment 11, the elastic force of the waist elastic member is less likely to act on the absorbent body at the discontinuous portion of the waist elastic member, thus suppressing the contraction of the absorbent body in the left-right direction. Furthermore, wrinkles are less likely to form on the absorbent body, and the absorbent body can be more easily fitted to the wearer's abdomen in a wide state. Therefore, the fit of the absorbent body on the abdominal side can be further improved when wearing the pant-type absorbent article. 【0032】 (Aspect 12) A pant-type absorbent article according to any one of aspects 1 to 11, having a pair of leg openings, the waist member having a buttock elastic member that expands and contracts along the periphery of the leg openings, and having a discontinuous portion of the buttock elastic member in the left-right central part where the buttock elastic member is discontinuous in the left-right direction. 【0033】In the pant-type absorbent article of embodiment 12, the elastic force of the buttock elastic member is less likely to act on the absorbent body at the discontinuous portion of the buttock elastic member, thus preventing the absorbent body from being pressed too strongly against the wearer's body (buttocks). Furthermore, since the force that contracts the absorbent body in the left-right direction is less likely to act at the discontinuous portion of the buttock elastic member, wrinkles are less likely to form on the surface of the absorbent body, and the absorbent body is more likely to be maintained in a wide, flat state. Therefore, the absorbent body can more easily cover the wearer's buttocks, improving the fit and making it easier to suppress leakage of excretion. 【0034】 (Aspect 13) The waistband member has a pair of separation parts on both sides in the left-right direction for separating the waistband member front to back, and in the extended state, the distance from the center position of the pants-type absorbent article in the left-right direction to the separation part on one side in the left-right direction is different from the distance from the center position of the pants-type absorbent article in the left-right direction to the separation part on the other side in the left-right direction. This is the pants-type absorbent article according to any one of aspects 1 to 12. 【0035】 According to the absorbent pant-type article of embodiment 13, it becomes easier for the wearer to recognize that the absorbent pant-type article has an asymmetrical shape in the left-right direction, compared to the case where the left and right lengths are the same. Furthermore, it becomes easier for the wearer to recognize that it is preferable to put on the absorbent pant-type article using different procedures on one side and the other side in the left-right direction. 【0036】 (Aspect 14) The engaging member has a tip compression portion at the inner end in the left-right direction, wherein a pattern of a predetermined shape is arranged at a predetermined pitch, and the average depth of the tip compression portion is greater than the average depth of the compression portion, as described in any of aspects 1 to 13. 【0037】 According to the pant-type absorbent article of embodiment 14, in the area where the engaging member is easily grasped by hand when gripping and pulling, the rigidity of the base sheet is increased by the tip compression portion, making the engaging member less likely to tear, thus making it easier to transmit the pulling force to the rear waist portion. This improves the operability when engaging or detaching the engaging member from the waist portion. 【0038】 (Aspect 15) The pants-type absorbent article according to any one of aspects 1 to 14, wherein the engaging member has an engaging portion compression portion that compresses the engaging portion in the thickness direction, and when viewed in the thickness direction, at least a part of the hook overlaps with the engaging portion compression portion. 【0039】 In the pant-type absorbent article of embodiment 15, in the portion where the hook and the engagement portion compression portion overlap, the hook is compressed and crushed in the thickness direction, resulting in a weaker overall engagement force of the engagement portion compared to the case where the engagement portion compression portion is not formed. Therefore, it is possible to easily detach the engagement portion that has been engaged with the waist member. In addition, because the engagement portion compression portion enhances the integration between the engagement portion and the base sheet, when detaching the engagement portion that has been engaged with the waist member, it is suppressed that the engagement portion detaches from the base sheet and remains on the waist member. This improves the operability when engaging or detaching the engagement portion from the waist member. 【0040】 (Aspect 16) The pant-type absorbent article according to any one of aspects 1 to 15, wherein, when viewed in the thickness direction, the tip compression portion and the engagement compression portion have overlapping portions and non-overlapping portions. 【0041】 In the pant-type absorbent article of embodiment 16, the thickness of the base sheet is smallest (thinnest) in the area where the tip compression part and the engagement compression part overlap. Also, in the area where the tip compression part and the engagement compression part do not overlap, and the hook and the engagement compression part overlap, the height of the hook is slightly higher because the base sheet is not compressed by the tip compression part. Furthermore, in the area where the tip compression part and the engagement compression part do not overlap, and the hook and the engagement compression part do not overlap, the height of the hook is highest because neither the base sheet nor the hook is compressed. In this way, the height of the hook protruding in the thickness direction changes in stages, which creates a gradient in the magnitude of the engagement force of the hook with respect to the waist member, making it easier to detach the engagement member compared to the case where the engagement force is uniform. This improves the operability when engaging or detaching the engagement member with respect to the waist member. 【0042】 === Embodiment === As an example of a panty-type (short-type) absorbent article according to an embodiment of the present invention, a panty-type (short-type) napkin 1 (hereinafter also simply referred to as "napkin 1") will be described. Note that panty-type (short-type) absorbent articles include panty-type (short-type) diapers and panty-type (short-type) absorbent pads. 【0043】 <Basic Structure of Napkin 1> FIG. 1 is a schematic perspective view of napkin 1 according to the present embodiment. FIG. 2 is a plan view of napkin 1 in a deployed and extended state as viewed from the thickness direction. FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2. Note that although the side joint 40 and the separation part 25 described later should not be shown in the cross-section at the position A-A in FIG. 2, their positions are shown in FIG. 3 for the sake of explanation. 【0044】 The "extended state" of napkin 1 means a state in which the entire napkin 1 (the entire product) is extended without wrinkles by extending each elastic member provided in napkin 1 (for example, the crotch elastic member 50 and the body circumference elastic member 26 described later). Specifically, it refers to a state in which each member constituting napkin 1 (for example, the non-skin side sheet 21 and the skin side sheets 22 and 23 described later) is extended until the dimensions of the member are the same as or close to the dimensions of the member alone. 【0045】 As shown in FIG. 1, napkin 1 has a "vertical direction", a "horizontal direction", and a "front-back direction" that are perpendicular to each other. Also, as shown in FIG. 3, it has a "thickness direction" which is the direction in which each member is laminated. Among the vertical direction, the side on the body circumference side of the wearer when the wearer wears napkin 1 is the "upper side", and the side on the crotch side of the wearer is the "lower side". Among the front-back direction, the side on the abdominal side of the wearer during wearing is the "front side", and the side on the back side of the wearer is the "back side". Among the thickness direction, the side that contacts the skin of the wearer when the wearer wears napkin 1 is the "skin side", and the opposite side is the "non-skin side". 【0046】Further, in the unfolded state shown in FIG. 2, the napkin 1 has a "longitudinal direction" and a "left - right direction" that are perpendicular to each other. The "longitudinal direction" is a direction along the vertical direction in the panty - type, and the "left - right direction" is a direction along the left - right direction in the panty - type. 【0047】 The napkin 1 of the present embodiment includes a liquid - absorbent absorbent body 10 that absorbs excretory fluids such as menstrual blood, a torso - surrounding member 20 that is disposed on the non - skin side of the absorbent body 10 and is disposed around the wearer's torso when the napkin 1 is worn, and engaging members 30 provided on both left - right sides of the torso - surrounding member 20. 【0048】 (Absorbent Body 10) FIG. 4 is a plan view and a cross - sectional view of the absorbent body 10 in an extended state. The absorbent body 10 has a substantially rectangular shape in plan view with the longitudinal direction along the vertical direction of the napkin 1. The absorbent body 10 has an absorbent core 11 along the longitudinal direction (vertical direction), a topsheet 12 disposed closer to the skin side than the absorbent core 11, and a backsheet 13 disposed closer to the non - skin side than the absorbent core 11. However, the absorbent body 10 may be provided with other sheet members. For example, a second sheet may be provided between the topsheet 12 and the absorbent core 11 in the thickness direction. Also, a lower - thigh elastic member 50 described later is provided on the non - skin side of the absorbent core 11. 【0049】 The absorbent core 11 is a member that absorbs and holds liquids such as menstrual blood, and is formed of liquid - absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP), for example. In the present embodiment, the outer peripheral surface of the absorbent core 11 is covered by a liquid - permeable core wrap sheet 18 made of tissue paper, non - woven fabric, or the like. However, the core wrap sheet 18 does not necessarily have to be provided. 【0050】 The topsheet 12 is a liquid - permeable sheet member that can contact the wearer's skin when worn, and is formed of, for example, a hydrophilic air - through non - woven fabric or a spunbond non - woven fabric. 【0051】The backsheet 13 is formed in a two-layer structure comprising a liquid-impermeable sheet 13a for preventing liquids such as menstrual blood absorbed by the absorbent core 11 from leaking to the outside, and a hydrophobic sheet 13b positioned on the non-skin side of the liquid-impermeable sheet 13a. For example, a resin film can be used as the liquid-impermeable sheet 13a, and for example, a flexible nonwoven fabric can be used as the hydrophobic sheet 13b. 【0052】 Furthermore, a pair of leak-proof walls 60, 60 are provided on both sides of the absorbent body 10 in the left-right direction. The leak-proof walls 60 correspond to so-called three-dimensional gathers, and when the napkin 1 is worn, the leak-proof walls 60 stand up on the skin side of the wearer from both sides of the absorbent body 10 in the left-right direction, thereby suppressing leakage of menstrual blood and other excretory fluids to the outside of the absorbent body 10. As shown in the cross-sectional view of Figure 4, in the napkin 1, the hydrophobic sheet 13b of the backsheet 13 described above, which is provided to cover the absorbent core 11 from the non-skin side, is folded back towards the skin side on both sides in the left-right direction and bent at multiple points to form a pair of leak-proof walls 60, 60. A leak-proof elastic member 61 (for example, elastic thread) is attached to the leak-proof walls 60 in an extended state along the longitudinal direction. When the napkin 1 is worn, the leak-proof wall portion 60 stands up on the skin side based on the elasticity of the leak-proof wall elastic member 61, and fits to the wearer's groin area. 【0053】Furthermore, as shown in Figures 2 to 4, the crotch area of ​​the absorbent body 10 of this embodiment is provided with multiple crotch elastic members 50 that expand and contract along the longitudinal direction (vertical direction). The crotch elastic members 50 are made of, for example, elastic thread and are positioned on the non-skin side of the absorbent core 11 (between the liquid-impermeable sheet 13a and the hydrophobic sheet 13b in Figure 4) in a state of being stretched in the longitudinal direction (vertical direction). In the napkin 1 of this embodiment, five crotch elastic members 50 are provided at predetermined intervals in the left-right direction, but the number of crotch elastic members 50 can be adjusted as appropriate. The stretch ratio of the crotch elastic members 50 is preferably about 1.4 to 3.3 times. The stretch ratio is expressed as the value obtained by dividing the length of the elastic member in the stretched state by the length of the elastic member in the natural state. By setting the elongation ratio of the crotch elastic member 50 to a sufficiently high ratio, the relatively rigid absorbent core 11 is contracted from the non-skin side in the thickness direction, causing a convex deformation towards the skin side, making it easier to fit the absorbent body 10 to the wearer's body when wearing the napkin 1. In other words, the elasticity exhibited by the crotch elastic member 50 lifts the absorbent body 10 towards the wearer's skin, making it easier for the absorbent body 10 to adhere closely to the wearer's crotch area, thus reducing the likelihood of leakage of menstrual blood and other excretory fluids. 【0054】 Furthermore, the absorbent body 10 is provided with high-density sections 80 formed by compressing at least the absorbent core 11 and the top sheet 12 in the thickness direction. In Figure 4, a pair of high-density sections 80 are provided in the left-right direction, each formed in a curved shape (dotted line shape) by intermittently arranging multiple dot-shaped compressed sections along the longitudinal direction. In the absorbent body 10, the areas where the high-density sections 80 are provided have a higher density than other areas, and the absorbent core 11 is more likely to undergo three-dimensional bending deformation using the high-density sections 80 as bending points. In other words, the linear high-density sections 80 function like hinges, making it easier for the planar absorbent core 11 to deform according to the contours of the wearer's body, and thus making it easier to fit the wearer's crotch area. 【0055】In the napkin 1, at least one (three in Figure 4) crotch elastic members 50 are positioned between a pair of high-density sections 80, 80 that are spaced apart in the left-right direction. In the parts of the absorbent core 11 that have increased rigidity due to the high-density sections 80, excessive contraction of the crotch elastic members 50 is suppressed, thereby preventing the entire absorbent core 11 from being strongly pressed against the crotch area. Furthermore, the elasticity of the crotch elastic members 50 positioned between the pair of high-density sections 80, 80 makes it easier for the area between the pair of high-density sections 80, 80 to undergo convex deformation toward the skin, making it easier for the napkin to adhere closely to the vagina or other excretory openings in the wearer's crotch area. This further improves the fit of the absorbent body 10. 【0056】 Furthermore, in addition to the high-density section 80, a compression section (not shown) that compresses the absorbent core 11 in the thickness direction may also be provided. For example, by providing a compression section different from the high-density section 80 at the end of the absorbent core 11 in the longitudinal direction, it becomes easier to control the thickness of the absorbent core 11. That is, even if the absorbent core 11 deforms convexly toward the skin based on the elasticity of the crotch elastic member 50 when the napkin 1 is worn, the increase in the thickness of the absorbent core 11 is suppressed by the other compression section (not shown) at the longitudinal end of the absorbent core 11, thereby suppressing the absorbent core 11 from being pressed too hard against the skin or reducing breathability, making it less likely to cause discomfort to the wearer. 【0057】(Waistband Member 20) The waistband member 20 is an outer casing composed of multiple sheet members, and includes at least a non-skin side sheet 21, skin side sheets 22, 23, and multiple waistband elastic members 26, 26... (see Figures 2 and 3). In the following description, the portion of the waistband member 20 in the longitudinal direction that is in front of the central position CL (abdominal side) is also called the front waistband portion 20f, and the portion that is behind the central position CL (back side) is also called the rear waistband portion 20b. The front waistband portion 20f is the part that touches the abdominal side of the wearer's body when the napkin 1 is worn, and corresponds to the "front panel" of the napkin 1. The rear waistband portion 20b is the part that touches the back side of the wearer's body when the napkin 1 is worn, and corresponds to the "back panel" of the napkin 1. In addition, a pair of separation portions 25, which will be described later, are provided at both left and right ends of the front waistband portion 20f (front panel) of the napkin 1. 【0058】 The non-skin side sheet 21 is a non-stretchable sheet member positioned on the non-skin side of the napkin 1, and is provided continuously from the front to the back in the longitudinal direction. The non-skin side sheet 21 is formed from, for example, spunbond nonwoven fabric or SMS nonwoven fabric. In this embodiment, as shown in the plan view of Figure 2, the non-skin side sheet 21 has a shape that is constricted inward in the left-right direction at the central part in the longitudinal direction (the part including the central position CL). Also, as shown in Figure 3, the non-skin side sheet 21 may be folded back at the longitudinal end so that the waist member 20 has a configuration of three or more layers in part. 【0059】 The skin-side sheet 22 is a sheet member laminated on the skin side of the non-skin-side sheet 21 on the front (ventral) side in the longitudinal direction, and is made of the same nonwoven fabric as the non-skin-side sheet 21. The skin-side sheet 23 is a sheet member laminated on the skin side of the non-skin-side sheet 21 on the rear (back) side in the longitudinal direction, and is made of the same nonwoven fabric as the non-skin-side sheet 21. 【0060】The waist elastic members 26 are formed from, for example, elastic thread, and are arranged in multiples between the non-skin-facing sheet 21 and the skin-facing sheet 22 (23) at predetermined intervals in the vertical direction, and are attached in a state that is stretched in the horizontal direction. The elasticity of these waist elastic members 26 in the horizontal direction allows the waist member 20 to fit the wearer's waist. 【0061】 The torso elastic member 26 can be attached using an adhesive such as a hot melt adhesive. For example, the torso elastic member 26 can be attached by applying a hot melt adhesive to the torso elastic member 26, stretching it to a predetermined elongation ratio, and sandwiching it between the non-skin side sheet 21 and the skin side sheet 22 (23). In other words, the non-skin side sheet 21 and the skin side sheet 22 (23) are joined by adhesive via the torso elastic member 26. Alternatively, the torso elastic member 26 may be attached by applying adhesive to the non-skin side sheet 21 and the skin side sheet 22 (23) rather than to the torso elastic member 26. 【0062】 From the unfolded state shown in Figure 2, the napkin 1 is folded in half longitudinally (front-to-back direction) with the central position CL in the longitudinal direction as the folding position, so that the skin-facing sides of the front waist portion 20f (front body) and the skin-facing sides of the back waist portion 20b (back body) face each other. In this folded state, the left and right ends 40f, 40f of the front waist portion 20f and the left and right ends 40b, 40b of the back waist portion 20b, which overlap front and back, are joined using known joining means such as seal welding to form a side joint portion 40. As a result, the folded waist members 20 (20f and 20b) are connected in a ring on the front (abdominal side) and back (back side), forming one waist opening 1a and a pair of leg openings 1b, 1b as shown in Figure 1, resulting in a panty-type napkin 1. 【0063】(Engaging Members 30) A pair of engaging members 30 are provided on both the left and right sides of the napkin 1. Figure 5 is a diagram illustrating the configuration of the engaging members 30. Figure 5A is a plan view of the engaging member 30 in its extended state, and Figure 5B is a cross-sectional view of the engaging member 30 in its extended state. Figure 6 is a schematic cross-sectional view showing an enlarged view of area X in Figure 5B. The engaging member 30 has a base sheet 31 and an engaging portion 32. The engaging member 30 is also provided with a tip compression portion 75 and an engaging portion compression portion 76, which will be described later. 【0064】 The base sheet 31 is a sheet member made of nonwoven fabric or the like. In this embodiment, the base sheet 31 is formed by laminating two sheet members, a first base sheet 311 and a second base sheet 312, in the thickness direction and joining them together (see Figures 5B and 6). The first base sheet 311 is a sheet member positioned opposite the body circumference member 20 (and engagement portion 32) in the thickness direction, and can be made of, for example, SMS nonwoven fabric. The first base sheet 311 has a plurality of first base sheet compression portions 71 on both sides in the thickness direction. The first base sheet compression portions 71 are formed by applying a compression process such as embossing to the first base sheet 311 from both sides in the thickness direction, and are distributed throughout the entire first base sheet 311. The spunbond layer and the meltblown layer constituting the first base sheet 311 (SMS nonwoven fabric) are joined together by these first base sheet compression portions 71. The first base sheet compression section 71 is a compression section formed in the manufacturing process of the first base sheet 311 (SMS nonwoven fabric). 【0065】 The second base sheet 312 is a sheet member laminated on the non-skin side of the first base sheet 311 in the thickness direction, and can be made of, for example, spunbond nonwoven fabric. The second base sheet 312 has a plurality of second base sheet compression sections 72 on at least one side in the thickness direction. The second base sheet compression sections 72 are formed by applying a compression process such as embossing to the second base sheet 312 in the thickness direction, and are distributed throughout the entire second base sheet 312. The second base sheet compression sections 72 are compression sections formed in the manufacturing process of the second base sheet 312 (spunbond nonwoven fabric). 【0066】 As described above, the engagement member 30 is constructed from at least two layers of sheet material (first base sheet 311 and second base sheet 312), thereby increasing the rigidity of the engagement member 30. This prevents the engagement member 30 from tearing during operations such as engaging or detaching it from the waist member 20. In particular, the inner end of the engagement member 30 in the left-right direction is the part that is grasped and pulled by the wearer's hand when wearing the napkin 1 (see Figure 8 described later), and is therefore susceptible to force. By increasing the rigidity of this inner end region by constructing a structure in which at least two or more layers of material are laminated, the operability when engaging or detaching the engagement member is improved. 【0067】 In napkin 1, the base sheet 31 is inseparably fixed to the waist member 20 on one side in the left-right direction (the outer side in the left-right direction in Figures 2 and 5A). Hereinafter, the part that inseparably fixes the engaging member 30 (base sheet 31) to the waist member 20 will also be called the base sheet fixing part 35. In this embodiment, the base sheet 31 and the waist member 20 are inseparably fixed by the side joint part 40 of the waist member 20 described above. That is, the side joint part 40 also serves as the base sheet fixing part 35. However, the base sheet 31 and the waist member 20 may be inseparably fixed by a base sheet fixing part 35 different from the side joint part 40. 【0068】An engaging portion 32 is provided on the other side of the base sheet 31 in the left-right direction (the inner side in the left-right direction in Figures 2 and 5A). The engaging portion 32 is a part for detachably engaging the engaging member 30 with the waist member 20, and is provided in a predetermined area (near the inner end in the left-right direction) on the surface of the engaging member 30 facing the waist member 20 (the skin side in Figure 5B). As shown in Figure 6, a plurality of hooks 325 protruding in the thickness direction are provided on the surface (skin side) of the engaging portion 32. The hooks 325 are locking members made of polypropylene or the like. By hooking the hooks 325 onto the fibers of the nonwoven fabric constituting the non-skin side sheet 21 provided on the outermost layer of the waist member 20, the engaging portion 32 (engaging member 30) is detachably locked to the non-skin side of the waist member 20. In other words, the engaging portion 32 functions as a so-called hook-and-loop fastener (mechanical fastener). 【0069】 In napkin 1, the engaging portion 32 is continuously provided in the vertical direction from the upper end to the lower end of the engaging member 30 (base sheet 31). By making the area of ​​the engaging portion 32 as large as possible, the stability when engaged with the waist member 20 is improved. In addition, because it is continuous in the vertical direction, the engaging portion 32 is prevented from bending up or down, improving operability when engaging or detaching it. 【0070】 <Regarding the operation of wearing napkin 1> Next, we will explain the operation of wearing napkin 1. In its initial state, napkin 1 is a panty-type (shorts-type) as shown in Figure 1, and can be worn as a normal panty-type absorbent item. When removing napkin 1 from the body, the waistband member 20, which is formed in a ring shape along the wearer's waist, can be separated into a front waistband portion 20f and a rear waistband portion 20b, and the napkin 1 can be removed by unfolding it. After separating the waistband member 20, the engaging member 30, which is attached to either the front waistband portion 20f or the rear waistband portion 20b, can be engaged with the other of the front waistband portion 20f or the rear waistband portion 20b, allowing it to be worn as a tape-type absorbent item. 【0071】When putting on the napkin 1, you may tear the perforation 25 (separation part 25) on either the left or right side beforehand. For example, you may put on the napkin 1 by passing one leg through the leg opening 1b on the other side (the side where the perforation 25 is not torn) and pulling it up to the crotch area, and then engaging the engaging member 30 on one side with the waist member 20 (see Figure 8 described later). You may also perform other attachment and detachment operations. 【0072】 Figures 7A and 7B illustrate the operation of separating the waistband member 20 of the napkin 1 into front and back sections. Figure 7A is a schematic cross-sectional view of the napkin 1 in its pant-like state, viewed from the upper side (the side of the waistband opening 1a), and Figure 7B is a schematic cross-sectional view of the state after the waistband member 20 has been separated into front and back sections. 【0073】 In the panty-type napkin 1, the front waistband portion 20f and the rear waistband portion 20b are joined to each other by side joint portions 40, 40 provided at both ends in the left-right direction, thereby forming an annular waistband opening 1a as shown in Figure 7A. A pair of engaging members 30 are provided on both sides of the waistband member 20 in the left-right direction, and these engaging members 30 are engaged with the non-skin side of the front waistband portion 20f by engaging portions 32. 【0074】 Furthermore, in Figure 7A, a pair of separation portions 25 are provided on both sides of the front waist portion 20f in the left-right direction. The separation portions 25 are provided to separate the waist member 20, which is formed in an annular shape along the wearer's waist, into the front waist portion 20f and the rear waist portion 20b, and are provided in either the left-right direction, inside the side joint portion 40 and outside the inner end of the engaging member 30. In other words, the separation portions 25 are provided in a position that overlaps with the engaging member 30 in the left-right direction. These separation portions 25 make it possible to separate the waist member 20 into a portion including at least the central part of the front waist portion 20f and a portion including at least the central part of the rear waist portion 20b. 【0075】In this embodiment, the separation section 25 is composed of so-called perforations, in which a plurality of grooves (cut sections 25a, described later) that penetrate the body member 20 in the thickness direction are intermittently arranged along the vertical direction from the body opening 1a to the leg opening 1b. By tearing the body member 20 along these perforations, the front body section 20f and the rear body section 20b can be easily separated. Hereinafter, the separation section 25 will also be referred to as "perforations 25". 【0076】 At the separation section 25 (perforation 25), the napkin 1, in which the waist member 20 is separated into a front waist member 20f and a rear waist member 20b, is in the state shown in Figure 7B. That is, the separation section 25 in Figure 7A is separated into a separation end 25fe on the front waist member 20f side and a separation end 25be on the rear waist member 20b side, and the front waist member 20f and the rear waist member 20b are separated front to back. In Figure 7B, on both the left and right sides, a pair of engaging members 30, 30 are joined to the rear waist member 20b side via a base sheet fixing section 35 (side joint section 40), and the engaging portions 32, 32 provided on the engaging members 30, 30 are engaged with the front waist member 20f, respectively. As a result, the waist member 20 is formed in an annular shape. To remove the napkin 1 from the wearer's body in this state, the napkin 1 can be unfolded and easily removed by peeling the engaging portion 32 from the front waist portion 20f. 【0077】 Next, as an example of the operation when putting on the napkin 1, we will explain the operation method when tearing the perforations 25 to separate the waist member 20 into front and back halves, and then engaging the engaging member 30 with the waist member 20 to put on the napkin 1 again. Figure 8 is a diagram illustrating an example of the operation when putting on the napkin 1. Figure 8 shows the case when putting on the napkin 1 in a state where one of the pair of perforations 25, 25 provided on both the left and right sides has been torn, while the other perforation 25 remains intact. 【0078】In Figure 8, when wearing the napkin 1, first, the wearer puts one leg (the left leg in Figure 8) through the leg opening 1b on the side where the perforations 25 have not been torn and pulls it up to about the knee. Next, the front waist section 20f and the back waist section 20b, separated by tearing the perforations 25, are grasped by both hands and pulled diagonally upward, pulling the entire napkin 1, including the absorbent body 10, up to the crotch. In Figure 8, on the wearer's right leg side, the wearer grasps the end of the front waist section 20f with their left hand and pulls it diagonally upward, and grasps the end (engaging member 30) of the back waist section 20b with their right hand and pulls it diagonally upward. Then, while holding the front waist section 20f with the left hand, the wearer wraps the back waist section 20b around the wearer's abdomen with their right hand and engages the engaging member 30 (engaging part 32) with the non-skin side of the front waist section 20f, forming the napkin 1 into a pant shape. This action allows for easy attachment of napkin 1. 【0079】 Furthermore, when removing the napkin 1 from the wearer's body, the engaging member 30 (engaging portion 32) engaged with the non-skin side of the front waist portion 20f is peeled off on the wearer's right leg side, thereby separating the front waist portion 20f and the rear waist portion 20b again, making it easy to remove the napkin 1. Note that on the wearer's left leg side in Figure 8, the perforations 25 may be torn at the time of removing the napkin 1 from the wearer's body. In this way, the front waist portion 20f and the rear waist portion 20b can be separated on both the left and right sides, making it even easier to remove the napkin 1. 【0080】 In the process of attaching and detaching the napkin 1, if the size of the engaging member 30 is excessively large, when engaging it with the front waist portion 20f, a part of the engaging member 30 may protrude from the front waist portion 20f and come into contact with the wearer's skin, potentially causing discomfort. On the other hand, if the size of the engaging member 30 is excessively small, as shown in Figure 8, it may become difficult to grasp the engaging member 30 when pulling up the rear waist portion 20b by grasping the engaging member 30. Furthermore, the tensile force transmitted to the rear waist portion 20b via the engaging member 30 may act locally on a narrow area of ​​the rear waist portion 20b, potentially causing strain or twisting in the rear waist portion 20b, making it difficult to engage it with the front waist portion 20f. 【0081】 Furthermore, if the engagement force of the engagement member 30 (engagement portion 32) with respect to the front waist portion 20f is too strong, it may become difficult to remove the engagement member 30 (engagement portion 32) from the front waist portion 20f when removing the napkin 1. For example, if one tries to forcibly remove the strongly engaged engagement portion 32, the bond between the base sheet 31 and the engagement portion 32 may break, leaving only the engagement portion 32 attached to the front waist portion 20f, or the nonwoven fabric constituting the front waist portion 20f may be torn. 【0082】 Therefore, in the napkin 1 of this embodiment, the operability and fit when engaging or disengaging the engaging member 30 (engaging portion 32) with the waist member 20 are improved by appropriately adjusting the configuration of the engaging member 30 and the engaging portion 32. The specific configuration of the engaging member 30 and the engaging portion 32 in the napkin 1 will be described below. 【0083】 As shown in Figure 5A, in napkin 1, the maximum vertical length h30 of the engaging member 30 is shorter than the vertical length h40 of the side joints 40 provided at both left and right ends (outer ends in the left and right direction) of the body member 20, and the maximum vertical length h30 of the engaging member 30 is longer than half the length h40 of the side joints 40 (h40 > h30 > h40 / 2). 【0084】The vertical length h40 of the side joint 40 corresponds to the minimum vertical length of the waist member 20 (see Figure 2, etc.). Therefore, if the maximum length h30 of the engaging member 30 is smaller than the length h40 of the side joint 40 (h40 > h30), it is easier to engage the engaging member 30 over a wide area of ​​the waist member 20. In addition, it is suppressed that the engaging member 30 protrudes outside the waist member 20 during engagement and comes into direct contact with the wearer's skin. On the other hand, since the maximum length h30 of the engaging member 30 is greater than half the length h40 of the side joint 40, it is easy to ensure that the engaging member 30 is large enough to be grasped by hand. Also, when grasping the engaging member 30 and pulling up the rear waist portion 20b, it is possible to apply tensile force to an area of ​​at least half or more of the side joint 40. Therefore, it is easier to suppress the localized force acting on a narrow area in the vertical direction of the waist member 20, which could cause strain or twisting in the waist member 20. 【0085】 Furthermore, the engaging member 30 has a convex shape that protrudes in a single position from the outside to the inside in the left-right direction. The engaging member 30 shown in Figure 5A has a substantially parabolic shape (convex shape) in which the length (width) in the vertical direction gradually narrows from the outside to the inside in the left-right direction. With such a shape, when grasping the engaging member 30 and pulling the rear body portion 20b, the position where the engaging member 30 should be grasped (the inner end in the left-right direction) is clear, and the force pulling the engaging member 30 can be efficiently transmitted to the side joint portion 40 (body portion 20) on the left-right outer side without being dispersed. 【0086】 Furthermore, the outer edge (contour) of the engaging member 30 is curved inward in the left-right direction compared to the engaging portion 32. For example, it is known that women tend to be more sensitive to sharp objects during their menstrual period, and if the outer edge of the engaging member 30 were angular, it could cause discomfort or unease. In contrast, the curved shape of the outer edge of the engaging member 30 on the left-right side reduces such discomfort. Also, by making the outer edge of the engaging member 30 curved, the degree to which it fits comfortably in the fingers and hand when grasped can be improved. 【0087】 Furthermore, in the napkin 1 of this embodiment, in the vertical direction, the upper edge of the engaging portion 32 and the upper edge of the engaging member 30 are in the same position, and the lower edge of the engaging portion 32 and the lower edge of the engaging member 30 are in the same position. In other words, when viewed in the thickness direction, the upper edge of the engaging portion 32 and the upper edge of the base sheet 31 overlap, and the lower edge of the engaging portion 32 and the lower edge of the base sheet 31 overlap. Since at least one of the upper and lower edges of the engaging portion 32 extends to the upper or lower end of the engaging member 30 (base sheet 31), the rigidity of the engaging member 30 is increased, making it easier to prevent the engaging member 30 from bending when attached. 【0088】 Furthermore, since the engaging portion 32 is bonded to the base sheet 31 from its upper end to its lower end, the engaging member 30 can be engaged and disengaged stably. If there were any parts of the engaging portion 32 that were not bonded to the base sheet 31 (so-called dry edges) at the upper or lower end, the upper and lower ends of the engaging member 30 would be prone to bending during the engaging operation, and consequently, the upper and lower ends of the engaging portion 32 would also be prone to bending. In this case, the bent upper and lower ends of the engaging portion 32 may come into contact with the wearer's fingers or skin, causing discomfort, or the engagement area between the engaging portion 32 and the waist member 20 may decrease, potentially reducing the engagement force. In contrast, in this embodiment, since the engaging portion 32 is firmly bonded from its upper end to its lower end, dry edges are less likely to form at the upper and lower ends of the engaging portion 32, thus preventing the engaging portion 32 from coming into contact with the wearer's fingers or reducing the engagement force. 【0089】 Furthermore, as shown in Figure 6, the base sheet 31 forming the engaging member 30 has multiple first base sheet compression sections 71 (compression sections) on the surface facing the engaging portion 32 (i.e., the skin-facing side of the first base sheet 311). When viewed in the thickness direction, the hooks 325 of the engaging portion 32 and the first base sheet compression sections 71 have overlapping portions. This prevents the engaging force of the engaging member 30 (engaging portion 32) on the waist member 20 from becoming excessively strong in the napkin 1. 【0090】Figure 9 is a diagram illustrating the mechanism of engagement between the waist member 20 and the engaging member 30 (engaging portion 32). Figure 9A shows a comparative example in which the first base sheet compression portion 71 (compression portion) is not provided on the surface of the base sheet 31 facing the engaging portion 32 (skin side). Figure 9B shows the napkin 1 of this embodiment in which the first base sheet compression portion 71 (compression portion) is provided on the surface of the base sheet 31 facing the engaging portion 32 (skin side). 【0091】 When engaging the engagement member 30 with the waist member 20, as shown in Figures 9A and 9B, with the engagement portion 32 facing the non-skin side of the waist member 20, the engagement member 30 (engagement portion 32) is pressed from the non-skin side to the skin side in the thickness direction so that the hooks 325 of the engagement portion 32 catch on the fibers constituting the waist member 20. In the comparative example Figure 9A, the force pressing the engagement member 30 toward the skin side acts on the entire area of ​​the engagement portion 32 via the base sheet 31, making it easier for all the hooks 325 to catch on the fibers constituting the waist member 20. In other words, the engagement force between the engagement portion 32 and the waist member 20 becomes stronger, making it difficult to easily separate them. If one tries to forcibly pull off the engagement member 30 from this state, the engagement portion 32 may detach from the base sheet 31 and remain engaged with the waist member, which may worsen the operability when engaging the engagement member 30 with the waist member 20. 【0092】 In contrast, with napkin 1, as shown in Figure 9B, when the engaging member 30 is pressed against the skin, some of the hooks 325 can move towards the non-skin side in the thickness direction so that they become embedded in the recess of the first base sheet compression section 71 at a position that overlaps with the first base sheet compression section 71. Therefore, when the engaging member 30 is pressed against the skin, the hooks 325 are less likely to catch on the fibers constituting the waist member 20 at a position that overlaps with the first base sheet compression section 71. In other words, the force pressing the hooks 325 against the waist member 20 (nonwoven fabric, etc.) is reduced, and the hooks 325 do not engage as deeply. Consequently, compared to the case in Figure 9A, the overall engagement force between the engaging member 30 and the waist member 20 is weakened, making it easier to smoothly engage and detach the engaging member 30 from the waist member 20. 【0093】 Furthermore, the crotch area of ​​the napkin 1 is provided with an elastic crotch member 50 that stretches along the longitudinal direction (up and down direction). Therefore, in the process of putting on the napkin 1 as described in Figure 8, when the waist member 20 is pulled upward, the elasticity of the crotch elastic member 50 makes it easier for the absorbent body 10 to be pulled upward, making it easier to fit to the wearer's crotch area. 【0094】 These configurations improve the operability and fit of the napkin 1 when engaging or disengaging the engaging member 30 (engaging portion 32) with the waist member 20 during attachment and detachment. 【0095】 Furthermore, when viewing the engaging member 30 of the napkin 1 in the thickness direction, the area of ​​the first base sheet compression portion 71 is larger than the area of ​​the hook 325. With this configuration, as shown in Figure 9B, the hook 325 can easily fit into the recess of the first base sheet compression portion 71, making it less likely for the engaging force of the engaging portion 32 (hook 325) to become excessively strong. In addition, the first base sheet compression portion 71 functions as a bending base point when the engaging member 30 (base sheet 31) bends and deforms in three dimensions. In this case, if the hook 325 is larger than the first base sheet compression portion 71, the bending deformation of the engaging member 30 may be interfered with by the hook 325, which may make it difficult to engage or disengage the engaging member 30 from the curved surface of the waist member 20 (the curved surface of the wearer's body). In contrast, with napkin 1, the bending deformation of the engaging member 30, with the first base sheet compression section 71 as the bending point, is less likely to be interfered with by the hook 325. Therefore, the engaging member 30 can easily deform freely according to the curved surface of the body member 20, making it easier to handle. Consequently, the operability when engaging or detaching the engaging member 30 from the body member 20 can be improved. 【0096】Furthermore, in the vertical direction of the extended napkin 1, as shown in Figure 5A, the distance g30t between the upper end 20ft of the front waist portion 20f (waist member 20) and the upper end 30t of the engaging member 30 is longer than the pitch P71 of the first base sheet compression portion 71 and the pitch P72 of the second base sheet compression portion 72 (g30t > P71, P72). Similarly, the distance g30b between the lower end 20fb of the front waist portion 20f (waist member 20) and the lower end 30b of the engaging member 30 is longer than the pitch P71 of the first base sheet compression portion 71 and the pitch P72 of the second base sheet compression portion 72 (g30b > P71, P72). In Figure 5A, the pitch P71 of the first base sheet compression section 71 and the pitch P72 of the second base sheet compression section 72 are depicted as being the same length, but the lengths of pitch P71 and pitch P72 may be different. 【0097】 When engaging or disengaging the engaging member 30 from the body circumference member 20, the first base sheet compression section 71 and the second base sheet compression section 72 become visible on the surface of the engaging member 30 (base sheet 31). At this time, by comparing the visible pitches P71 and P72 of the first base sheet compression section 71 and the second base sheet compression section 72, it is possible to make it easier for the user to recognize that the gaps g30t and g30b between the upper and lower ends 20ft and 20fb of the front body circumference section 20f and the upper and lower ends 30t and 30b of the engaging member 30 are wide. In other words, because g30t or g30b is wider than the pitches P71 and P72 of the first base sheet compression section 71 and the second base sheet compression section 72, it is possible to make it easier for the user to recognize that the front body circumference section 20f (body circumference member 20) is formed to be wider vertically than the engaging member 30. This configuration makes it easier for the user to recall that the front waist portion 20f (waist portion 20) will firmly cover the body when wearing the napkin 1, thus providing a good fit and a sense of security. Furthermore, by making the user aware that the front waist portion 20f is wider than the engaging member 30, it becomes easier to engage the engaging member 30 with the front waist portion 20f. 【0098】Furthermore, because the distance g30t is longer than the pitches P71 and P72 (see Figure 5A), when the napkin 1 is worn, the part that forms the waist opening 1a at the upper end of the front waist portion 20f (waist member 20) makes it easier for the wearer's abdomen to be firmly covered, thereby improving the fit around the waist. 【0099】 Furthermore, because the distance g30b is longer than the pitches P71 and P72 (see Figure 5A), when the napkin 1 is worn, the lower end of the front waist portion 20f (waist member 20) forms the leg opening 1b, which makes it easier for the wearer's legs to be securely covered, thus improving the fit around the legs. 【0100】 Furthermore, in napkin 1, the pitch of the first base sheet compression section 71 is larger than the pitch of the hook 325 in both the vertical and horizontal directions. Figures 10A and 10B illustrate the relationship between the pitch of the first base sheet compression section 71 and the pitch of the hook 325. In Figures 10A and 10B, the pitch of the first base sheet compression section 71 is denoted as P71 and the pitch of the hook 325 as P325 in the horizontal (vertical) direction. Figure 10A shows the case where the pitch P71 of the first base sheet compression section 71 is larger than the pitch P325 of the hook 325, similar to napkin 1 of this embodiment (P71 > P325). On the other hand, Figure 10B shows the case where, unlike napkin 1 of this embodiment, the pitch P71 of the first base sheet compression section 71 is smaller than the pitch P325 of the hook 325 (P71 < P325). 【0101】 As explained in Figure 9B, when engaging the engagement member 30 with the waist member 20, the hook 325, which is positioned in a location that does not overlap with the first base material sheet compression section 71, is pressed against the skin side in the thickness direction and catches on the nonwoven fabric constituting the waist member 20, thereby engaging the two. In other words, the hook 325, which is positioned between the two first base material sheet compression sections 71, 71 that are adjacent to each other in the left-right direction (up-down direction), catches on the nonwoven fabric. 【0102】Here, if P71 < P325 (Figure 10B), there can be at most one hook 325 positioned between adjacent first base material sheet compression sections 71, 71, making it difficult to obtain sufficient engagement force. Furthermore, in the portion where the first base material sheet compression section 71 and the hook 325 overlap, the hook 325 moves towards the non-skin side in the thickness direction so as to be embedded in the recess of the first base material sheet compression section 71 (see Figure 9B), further weakening the engagement force. In other words, it may become difficult to engage the engagement member 30 with the body circumference member 20. 【0103】 In contrast, when P71 > P325 (Figure 10A), there is a high probability that multiple hooks 325 will be positioned between adjacent first base sheet compression sections 71, 71, resulting in a stronger engagement force compared to the case in Figure 10B. Furthermore, in the portion overlapping with the first base sheet compression section 71, as described above, the hooks 325 move towards the non-skin side in the thickness direction so as to be embedded in the recess of the first base sheet compression section 71 (see Figure 9B), thus suppressing excessive engagement force. Therefore, by making the pitch P325 of the hooks 325 smaller than the pitch P71 of the first base sheet compression section 71, the engagement force of the engagement member 30 can be easily adjusted to an appropriate strength, and the operability when attaching and detaching the engagement member 30 can be improved compared to the opposite case. 【0104】 Furthermore, in napkin 1, in the thickness direction, the average depth of the first base sheet compression section 71 is greater than the average height of the hook 325. Figures 11A and 11B illustrate the relationship between the depth of the first base sheet compression section 71 and the height of the hook 325. In Figures 11A and 11B, in the thickness direction, the depth of the first base sheet compression section 71 is h71 and the height of the hook 325 is h325. Figure 11A shows the case where the depth h71 of the first base sheet compression section 71 is greater (deeper) than the height h325 of the hook 325 (h71 > h325), similar to napkin 1 of this embodiment. On the other hand, Figure 11B shows the case where the depth h71 of the first base sheet compression section 71 is less (shallower) than the height h325 of the hook 325 (h71 < h325), unlike napkin 1 of this embodiment. 【0105】In the operation of engaging the engagement member 30 with the body circumference member 20, when the hook 325 is pressed towards the body circumference member 20 (nonwoven fabric), at positions where the hook 325 and the first base material sheet compression section 71 overlap, the hook 325 enters a recess in the first base material sheet compression section 71, as shown in Figure 9B, thus reducing the engagement force. However, when h71 < h325 (Figure 11B), a part of the hook 325 (the tip) protrudes from the first base material sheet compression section 71, and this protruding part catches on the fibers of the nonwoven fabric constituting the body circumference member 20, making it difficult to reduce the engagement force. Furthermore, even at positions where the hook 325 and the first base material sheet compression section 71 do not overlap, the higher the height h325 of the hook 325, the easier it is for it to become deeply entangled with the nonwoven fabric fibers, thus increasing the engagement force. Therefore, once the engagement member 30 is engaged with the body circumference member 20, it becomes difficult to remove the engagement member 30. 【0106】 In contrast, when h71 > h325 (Figure 11A), at the position where the hook 325 and the first base sheet compression section 71 overlap, the entire hook 325 is less likely to protrude from the recess of the first base sheet compression section 71 (see Figure 9B), and excessive engagement force is suppressed. Therefore, by making the height h325 of the hook 325 smaller than the depth h71 of the first base sheet compression section 71, the engagement force of the engagement member 30 can be easily adjusted to an appropriate strength, and the operability when attaching and detaching the engagement member 30 can be further improved compared to the opposite case. 【0107】 As a method for comparing the height (depth) of the first base sheet compression section 71 and the height of the hook 325, examples include measuring multiple points (for example, 10 points) of the cross-section of the first base sheet 311 (the portion including the first base sheet compression section 71) and the engaging section 32 (hook 325) of the engaging member 30 in the thickness direction using a microscope, calculating the average value, and comparing them, or taking photographs of the cross-sections and comparing them using computer-based image analysis. 【0108】Furthermore, in napkin 1, the engaging member 30 is provided with a tip compression section 75 and an engaging compression section 76. As shown in Figures 5A and 5B, the tip compression section 75 is provided in the inner end region in the left-right direction of the engaging member 30 and is the part that compresses the first base sheet 311 and the second base sheet 312, which constitute the base sheet 31, in the thickness direction. Since this tip compression section 75 compresses the two stacked sheet members integrally, it is a deeper compression section than the first base sheet compression section 71 and the second base sheet compression section 72, which compress the first base sheet 311 and the second base sheet 312 respectively. In Figure 5A, the tip compression section 75, which has a honeycomb structure in which regular hexagons are arranged without gaps, is provided in the region in the left-right direction inward from the part where the engaging member 32 is provided. However, the tip compression section 75 may be formed by a shape (pattern) other than the honeycomb pattern shown in Figure 5A. 【0109】 In the region where the tip compression section 75 is provided, the integration and rigidity of the first base sheet 311 and the second base sheet 312 are enhanced. As this region is the part that is grasped by hand when gripping and pulling the engaging member 30 as shown in Figure 8, the increased rigidity of this region makes the engaging member 30 less likely to tear and makes it easier to transmit the pulling force to the rear body section 20b. This improves the operability when engaging or detaching the engaging member 30 from the body section 20. 【0110】The engagement portion compression portion 76 is provided in the region of the engagement member 30 that overlaps with the engagement portion 32, and is a portion that compresses the engagement portion 32 and the base sheet 31 in the thickness direction from the skin side to the non-skin side of the engagement portion 32. In Figure 5A, the diagonal grid-shaped engagement portion compression portion 76 is provided in the region that overlaps with the engagement portion 32 in the left-right direction, and in the regions on both sides thereof (i.e., a wider area than the engagement portion 32). In the portion of the multiple hooks 325, 325... provided on the engagement portion 32 that overlaps with the engagement portion compression portion 76, the hooks 325 are compressed and crushed in the thickness direction, so that they lose their function as hooks. In other words, the overall engagement force of the engagement portion 32 is weakened compared to when the engagement portion compression portion 76 is not formed. Therefore, the engagement member 30 that has engaged with the body circumference member 20 can be easily peeled off. Furthermore, the engagement portion compression portion 76 enhances the integration between the engagement portion 32 and the base sheet 31, thereby preventing the engagement portion 32 from detaching from the base sheet 31 and remaining on the body member 20 when the engagement portion 30 is detached from the body member 20. This improves the operability when engaging or detaching the engagement portion 30 from the body member 20. 【0111】Furthermore, when viewed in the thickness direction, the engaging member 30 has a portion where the tip compression portion 75 and the engaging compression portion 76 overlap, and a portion where they do not overlap. In the engaging member 30, the thickness of the base sheet 31 is smallest (thinnest) in the portion where the tip compression portion 75 and the engaging compression portion 76 overlap. Therefore, in the left-right direction of Figure 5B, the height of the hook 325 protruding in the thickness direction is lowest in the portion where the tip compression portion 75, the engaging compression portion 76, and the engaging portion 32 (hook 325) overlap. Next, in the portion where the tip compression portion 75 and the engaging compression portion 76 do not overlap, and the engaging portion 32 (hook 325) and the engaging compression portion 76 overlap, the height of the hook 325 protruding in the thickness direction is slightly higher because the base sheet 31 is not compressed by the tip compression portion 75. Furthermore, in the portion where the tip compression portion 75 and the engaging portion compression portion 76 do not overlap, and where the engaging portion 32 (hook 325) and the engaging portion compression portion 76 do not overlap, neither the base sheet 31 nor the hook 325 are compressed, so the height of the hook 325 protruding in the thickness direction is the highest. 【0112】 In this way, because the height of the hook 325 protruding in the thickness direction of the engaging member 30 changes in stages, a gradient is easily created in the magnitude of the engaging force of the hook 325 against the body member 20 (nonwoven fabric). Therefore, compared to the case where the engaging force is uniform, it becomes easier to detach the engaging member 30 when it is engaged with the body member 20. This improves the operability when engaging or detaching the engaging member 30 from the body member 20. 【0113】Furthermore, the waist elastic member 26 may have a portion where it overlaps with the engagement member 30 in the vertical direction, and a portion in the center in the horizontal direction where it is discontinuous in the horizontal direction. For example, in the area shown by the shaded area in Figure 2, the waist elastic member 26 may be cut or otherwise provided to create a discontinuous portion 26nc of the waist elastic member where it is discontinuous in the horizontal direction. In the discontinuous portion 26nc of the waist elastic member, the elastic force of the waist elastic member 26 is less likely to act on the absorbent body 10, thus suppressing contraction of the absorbent body 10 in the horizontal direction. In addition, wrinkles are less likely to form on the absorbent body 10, and the absorbent body 10 can be more easily fitted to the wearer's abdomen in a wide state. Therefore, when wearing the napkin 1, the fit of the absorbent body 10 on the abdominal side can be further improved. 【0114】 For example, when wearing the napkin 1, as explained in Figure 8, the outer ends of the front waist portion 20f in the left-right direction are grasped and pulled diagonally upward. At this time, the elasticity of the waist elastic member 26 is less effective at the discontinuous portion 26nc of the waist elastic member, thus preventing the absorbent body 10 from being pressed too strongly against the wearer's body (abdomen). Furthermore, when the engaging member 30 is engaged with the front waist portion 20f, the force that contracts the absorbent body 10 in the left-right direction (the elasticity of the waist elastic member 26) is less effective at the discontinuous portion 26nc of the waist elastic member, making it less likely for wrinkles to form on the surface of the absorbent body 10, and making it easier for the absorbent body 10 to be maintained in a wide, flat state. Therefore, the absorbent body 10 can easily fit snugly against the wearer's abdomen, making it easier to suppress leakage of excretion. 【0115】 Furthermore, similar to the front waist portion 20f, the rear waist portion 20b may also be provided with a discontinuous portion 26nc of the waist elastic member. On the other hand, the discontinuous portion 26nc of the waist elastic member is not necessarily provided in the napkin 1. That is, the waist elastic member 26 may be continuous in the left-right direction in the portion where the engaging member 30 and the waist elastic member 26 overlap in the vertical direction, and in the central portion in the left-right direction. 【0116】Furthermore, the rear waist portion 20b of the napkin 1 is provided with a buttock elastic member 27 that expands and contracts along the periphery of the leg opening 1b (see Figure 2). The buttock elastic member 27 is formed from elastic thread or the like, similar to the waist elastic member 26, and is attached between the non-skin side sheet 21 and the skin side sheet 23 in a state where it is curved and stretched along the contour of the leg opening 1b. When the napkin 1 is worn, the elasticity of the buttock elastic member 27 along the leg opening 1b makes it easier for the rear waist portion 20b to fit and cover the wearer's buttocks. 【0117】 Furthermore, a discontinuous portion 27nc of the buttock elastic member may be provided, where the buttock elastic member 27 is discontinuous in the central part in the left-right direction. This makes it possible to further improve the fit of the absorbent body 10 on the back side (buttock side) when wearing the napkin 1. For example, when wearing the napkin 1, the outer ends (engaging members 30) of the rear waist portion 20b in the left-right direction are grasped and pulled diagonally upward (see Figure 8). At this time, the elastic force of the buttock elastic member 27 is less likely to act in the discontinuous portion 27nc of the buttock elastic member, so that the absorbent body 10 is not pressed too hard against the wearer's body (buttocks). Furthermore, when wearing the napkin 1, the discontinuous portion 27nc of the buttock elastic member is less susceptible to the force that contracts the absorbent body 10 in the left-right direction (the stretching force of the buttock elastic member 27). As a result, wrinkles are less likely to form on the surface of the absorbent body 10, and the absorbent body 10 is more likely to be maintained in a wide, flat state. Therefore, the absorbent body 10 can more easily cover the wearer's buttocks, improving the fit and making it easier to suppress leakage of excretion. 【0118】Furthermore, in the vertical direction of the napkin 1, it is preferable that the upper end position 27f of the buttock elastic member 27 is located above the lower end position 30b of the engaging member 30. In other words, in the vertical direction of the panty-type napkin 1, it is preferable that the engaging member 30 and the buttock elastic member 27 have an overlapping portion. With such a configuration, when putting on the napkin 1, the force of grasping the engaging member 30 and pulling the rear waist portion 20b diagonally upward is more easily transmitted to the buttock elastic member 27, making it easier to pull up the rear waist portion 20b. This makes it easier to fit the rear waist portion 20b and the leg opening 1b to the wearer's body on the buttock side. 【0119】 Furthermore, the engaging member 30 may be provided with a folding guide line 37 that facilitates bending the engaging member 30 in a predetermined direction. Figures 12A and 12B illustrate the folding guide line 37 provided on the engaging member 30. Figure 12A is a schematic cross-sectional view showing the cross-sectional state of the napkin 1 when viewed in the vertical direction, and Figure 12B is a plan view of the engaging member 30 provided with the folding guide line 37. 【0120】 The folding guide line 37 is provided along the vertical direction between the side joint portion 40 and the engaging portion 32 in the left-right direction (see Figure 12B), and the engaging member 30 (base sheet 31) is made easier to fold with the folding guide line 37 as the starting point so that it becomes convex towards the non-skin side in the thickness direction (Figure 12A). As a result, a space is easily formed between the engaging member 30, which is convex towards the non-skin side at the position of the folding guide line 37, and the waist member 20 (20f), making it easier for the wearer to see the engaging member 30. In addition, by inserting a finger into this space, it becomes easier to pull the engaging member 30 towards the non-skin side and peel it away from the waist member 20. Therefore, the action of putting on the napkin 1 can be made easier. 【0121】<Regarding understanding of napkin 1> We have explained that napkin 1 can be used in both panty-type and tape-type configurations. Generally, the methods and procedures for wearing panty-type absorbent items and tape-type napkins differ. In particular, wearing the napkin in tape-type configuration requires different procedures for the left and right sides, so it is necessary for wearers to be aware of this method of wearing. 【0122】 For example, in the case of a panty-type sanitary napkin 1, the napkin can be worn by inserting both legs through the pair of leg openings 1b from the waist opening 1a side, and then pulling the napkin 1 up until the waist opening 1a reaches the wearer's waist. In other words, a panty-type sanitary napkin 1 can be worn on both sides of the wearer's body with almost symmetrical and similar movements. 【0123】 On the other hand, when wearing the napkin 1 in a tape-type state, for example, the perforation 25 on one side in the left-right direction of the pant-type state is used to tear one end of the front waistband portion 20f in the left-right direction, and the engaging member 30 on one side is engaged with the front waistband portion 20f to pass one leg of the wearer through the leg opening 1b on one side in the left-right direction of the napkin 1. Subsequently, the perforation 25 on the other side in the left-right direction of the front waistband portion 20f is torn, and the engaging member 30 on the other side is engaged with the front waistband portion 20f to pass the wearer's other leg through the leg opening 1b on the other side in the left-right direction of the napkin 1. 【0124】 However, since typical panty-type (shorts-type) absorbent products have a symmetrical shape when viewed from above, absorbent products that can be worn in both panty-type and tape-type configurations, such as napkin 1, may not be easily recognized by the wearer as requiring different procedures for the left and right sides when worn in tape-type configuration. In particular, since napkin 1 is in panty-type configuration when removed from the package, it may be difficult for the wearer to recognize that the procedure for wearing napkin 1 in tape-type configuration differs between the left and right sides. 【0125】Therefore, with respect to the panty-type napkin 1, by making its shape asymmetrical with respect to the center position in the left-right direction when extended, it may be made easier for the wearer to recognize that it is preferable to put on the napkin 1 using different procedures on one side and the other side in the left-right direction. 【0126】 Figure 13 is a plan view showing an example of a napkin 1 with an asymmetrical shape with respect to the central position C-C in the left-right direction. In Figure 13, in the extended state of the napkin 1, the engaging member 30 provided on one side in the left-right direction is referred to as the one-side engaging member 30a, and the engaging member 30 provided on the other side in the left-right direction is referred to as the other-side engaging member 30b. The same applies to other parts other than the engaging members 30 (for example, the side joint 40 and the engaging part 32, etc.). 【0127】 As shown in Figure 13, in the extended state, the length L1a from the other end 30aei of one-side engaging member 30a to the other end 40au of one-side side joint 40a (one-side fixing part 35a) in the left-right direction is different from the length L1b from the one end 30bei of the other-side engaging member 30b to the one end 40bu of the other-side side joint 40b (other-side fixing part 35b) (L1a ≠ L1b). 【0128】Because the lengths L1a and L1b of the napkin 1 in its stretched state are different in the left-right direction, it becomes easier for the wearer to recognize that the napkin 1 has an asymmetrical shape with respect to the center C-C in the left-right direction. Therefore, it becomes easier for the wearer to recognize and be aware that it is preferable to put on one side of the napkin 1 using different procedures. In particular, in the case of absorbent items that can be worn in a panty-type state, such as the napkin 1, panty-type absorbent items generally have a symmetrical shape, so wearers can easily become confused when trying to put them on in a tape-type state. In contrast, with the napkin 1 shown in Figure 13, the initial panty-type state of the napkin 1 has an asymmetrical shape with respect to the center C-C in the left-right direction, making it easier for the wearer to recognize that the napkin 1 is not a typical panty-type absorbent item but can also be worn in a tape-type state, and that it is preferable to put on one side of the napkin 1 using different procedures in the left-right direction. 【0129】 Furthermore, in the stretched state of the napkin 1, it is preferable that the length (distance) L2a from the central position C-C in the left-right direction to the separation portion (perforation) 25aa on one side and the length (distance) L2b from the central position C-C in the left-right direction to the separation portion (perforation) 25bb on the other side are different (L2a ≠ L2b). 【0130】 This makes it easier for the wearer to recognize that the napkin 1 has an asymmetrical shape with respect to the center C-C in the left-right direction, compared to when lengths L2a and L2b are the same length. It also makes it easier for the wearer to recognize that it is preferable to put on the napkin 1 using different procedures on one side and the other side in the left-right direction. 【0131】 Furthermore, in the extended state of the napkin 1, it is preferable that the length L3a from the center 32ac of the one-side engaging portion 32a in the left-right direction to the other end 40au of the one-side joint portion 40a (one-side fixing portion 35a) and the length L3b from the center 32bc of the other-side engaging portion 32b in the left-right direction to the one end 40bu of the other-side joint portion 40b (other-side fixing portion 35b) are different (L3a ≠ L3b). 【0132】This makes it easier for the wearer to recognize that the napkin 1 has an asymmetrical shape with respect to the center C-C in the left-right direction, compared to when lengths L3a and L3b are the same length. It also makes it easier for the wearer to recognize that it is preferable to put on the napkin 1 using different procedures on one side and the other side in the left-right direction. 【0133】 Furthermore, in the extended state of the napkin 1, the area of ​​the engagement member 30a on one side and the area of ​​the engagement member 30b on the other side may be different. By visually observing the engagement member 30a and the engagement member 30b of different sizes, it becomes easier for the wearer to recognize that the napkin 1 has an asymmetrical shape with respect to the center in the left-right direction, compared to when the engagement member 30a and the engagement member 30b have the same area. Therefore, it becomes easier for the wearer to recognize that it is preferable to use different procedures for one side and the other side of the napkin 1 in the left-right direction when putting it on. 【0134】 Furthermore, in the extended state of the napkin 1, the shape of the engagement member 30a on one side and the shape of the engagement member 30b on the other side may be different. For example, the engagement member 30a on one side may be semicircular, and the engagement member 30b on the other side may be rectangular (not shown in Figure 13). By visually observing the engagement member 30a on one side and the engagement member 30b on the other side, the wearer can more easily recognize that the napkin 1 has an asymmetrical shape with respect to the center in the left-right direction. Therefore, it becomes easier for the wearer to recognize that it is preferable to put on the napkin 1 using different procedures on one side and the other side in the left-right direction. 【0135】 Furthermore, in the extended state of the napkin 1, the length L4a from the central position C-C of the crotch elastic member 50 to the other end 30aei of one side engaging member 30a in the left-right direction is different from the length L4b from the central position C-C of the crotch elastic member 50 to the one end 30bei of the other side engaging member 30b (L4a ≠ L4b). 【0136】This makes it easier for the wearer to recognize that the napkin 1 has an asymmetrical shape with respect to the center C-C in the left-right direction, compared to when lengths L4a and L4b are the same length. It also makes it easier for the wearer to recognize that it is preferable to put on the napkin 1 using different procedures on one side and the other side in the left-right direction. 【0137】 <About the configuration of the perforations 25 (separation section 25)> The perforations 25 (separation section 25) provided on the waist member 20 may have the following configuration. Figure 14 is a diagram illustrating an example of the configuration of the perforations 25 (separation section 25). As shown in Figure 14, the separation section 25 has a plurality of "cut sections 25a" and a plurality of "non-cut sections 25b" that are alternately arranged in the vertical direction (longitudinal direction). In the cut sections 25a, all or part of the sheet members (non-skin side sheet 21 and skin side sheet 22) laminated in the front waist section 20f is cut. In other words, the cut section 25a is an opening through which the entire sheet member is cut in the thickness direction, or a groove that is recessed in the thickness direction where a part of the sheet member is cut. In the separation section 25, the strength of the front waist section 20f is reduced by the cut sections 25a, and the front waist section 20f becomes more prone to tearing in the vertical direction. 【0138】 The separation section 25 extends vertically from the upper end 20fu (body opening 1a) to the lower end 20fl (leg opening 1b) of the front body section 20f. Therefore, by tearing the front body section 20f vertically along the separation section 25, the body member 20 is separated into front and rear sections. 【0139】 Furthermore, as shown in Figure 14, the multiple notches 25a include an "upper notch 25a1" located second from the top, a "lower notch 25a2" located second from the bottom, and an "intermediate notch 25a3" located between the upper notch 25a1 and the lower notch 25a2. Moreover, in the extended state of the napkin 1, the vertical length L25a3 of the intermediate notch 25a3 is longer than the vertical length L25a1 of the upper notch 25a1 and the vertical length L25a2 of the lower notch 25a2 (L25a3 > L25a1, L25a3 > L25a2). 【0140】In other words, an intermediate cut portion 25a3, which is longer in the vertical direction, is provided at a position inward in the vertical direction from the upper and lower ends of the waist member 20 (front waist portion 20f). Therefore, compared to a separation portion without an intermediate cut portion 25a3 (i.e., a separation portion consisting only of short cut portions), the longer intermediate cut portion 25a3 acts as a starting point, making the separation portion 25 more prone to tearing. Thus, it becomes easier to separate the waist member 20 when attaching or detaching the napkin 1. 【0141】 Furthermore, the upper and lower notches 25a1 and 25a2 located at the upper or lower end of the waist member 20 are more likely to become the starting point for tearing of the separation portion 25 compared to the intermediate notch 25a3. Therefore, by making the intermediate notch 25a3 longer, rather than the upper and lower notches 25a1 and 25a2, unintended tearing of the separation portion 25 before use or while wearing the napkin 1 can be suppressed, and the annular waist member 20 is maintained. 【0142】 Furthermore, the vertical length L25a3 of the intermediate cut portion 25a3 in this embodiment is longer than the vertical length of each of the cut portions 25a, including the upper cut portion 25a1 and the lower cut portion 25a2. Also, in the extended state of the napkin 1, the separation portion 25 in this embodiment has a straight shape along the vertical direction, but the separation portion 25 may be inclined with respect to the vertical direction or may have a curved shape. 【0143】Furthermore, in the stretched state of the napkin 1, it is preferable that the average vertical length of all notches 25a other than the intermediate notch 25a3 (for example, L25aave in Figure 14) is longer than the average vertical length of all non-notched sections 25b (for example, L25bave in Figure 14) (L25aave > L25bave). This increases the proportion of the total length of the notches 25a in the separation section 25, making the separation section 25 more prone to tearing. However, the above is not limited to the above; the average length L25aave of the notches 25a may be less than or equal to the average length L25bave of the non-notched sections 25b. Also, in Figure 14, the vertical lengths of the notches 25a other than the uppermost and lowermost notches 25a and the intermediate notch 25a3 that reach the upper and lower ends of the waist member 20 are constant, but the vertical lengths of the notches 25a may be irregular. Similarly, the vertical length of the non-cut portion 25b is not limited to being constant, but may be irregular. 【0144】 ===Second Embodiment=== In the second embodiment, a napkin 2 is described in which the configuration of the waist member 20 differs from that of the napkin 1 of the first embodiment. In napkin 2, the configuration of parts other than the waist member 20 (for example, the absorbent body 10 and the engaging member 30) is the same as that of napkin 1 (see Figures 1, 2, 4, etc.). Therefore, the waist member 20, which has a different configuration from that of napkin 1, will be described below, and the configuration of parts other than the waist member 20 will not be described. 【0145】Figure 15 is a diagram illustrating the cross-sectional structure of the waist member 20 of the napkin 2. The waist member 20 of the napkin 2 comprises a non-skin side sheet 21 (referred to as the "first sheet") provided on the non-skin side in the thickness direction, skin side sheets 22, 23 (referred to as the "second sheet") provided on the skin side, an intermediate layer sheet 24 (referred to as the "third sheet") sandwiched between the non-skin side sheet 21 and the skin side sheets 22, 23 in the thickness direction, and a plurality of waist elastic members 26, 26.... In other words, the waist member 20 of the napkin 2 is constructed by laminating at least three sheet members, the non-skin side sheet 21, the intermediate layer sheet 24, and the skin side sheet 22 (23), from the non-skin side to the skin side in the thickness direction. A plurality of waist elastic members 26, 26... are attached between the intermediate layer sheet 24 and the skin side sheet 22 (23) at predetermined intervals in the vertical direction, and are extended in the horizontal direction. 【0146】 Each of the non-skin-facing sheet 21, skin-facing sheets 22 and 23, and waist elastic member 26 has substantially the same configuration as the members described in the napkin 1 of the first embodiment. The middle layer sheet 24 is a non-stretchable sheet member, and is formed, for example, from a nonwoven fabric similar to that of the skin-facing sheets 22 and 23, and has the same shape (size) as the skin-facing sheets 22 (23). However, the configuration of the waist member 20 is not limited to this, and for example, the skin-facing sheets 22 and 23 may be made of a single sheet member (nonwoven fabric) that is continuous from the front (abdominal side) to the back (dorsal side) in the longitudinal direction. In this case, the middle layer sheet 24 only needs to be large enough to cover the area where the waist elastic member 26 is located. The non-skin-facing sheet 21 (first sheet) and the middle layer sheet 24 (third sheet) are joined to each other via an adhesive such as hot melt adhesive (HMA). The skin-side sheets 22 and 23 (second sheets) and the middle layer sheet 24 (third sheet) are joined to each other via an adhesive such as hot melt adhesive (HMA) applied to the surface of the torso elastic member 26. 【0147】In the napkin 2 of the second embodiment, when the engaging member 30 is engaged with the non-skin side of the waist member 20, the engaging portion 32 (hook 325) is pressed against the non-skin side sheet 21 (first sheet) from the non-skin side toward the skin side. At this time, since an intermediate sheet 24 (third sheet) is provided between the non-skin side sheet 21 (first sheet) and the waist elastic member 26 in the thickness direction, the influence of the hook 325 pressed toward the skin side does not easily extend to the waist elastic member 26. In other words, the intermediate sheet 24 (third sheet) functions as an interference member, which prevents the waist elastic member 26 from being damaged or cut by the hook 325. Furthermore, when the engaging member 30 engaged with the waist member 20 is detached, the waist elastic member 26 is also less affected. As a result, even when the engagement and detachment of the engaging member 30 is repeated, the elasticity of the waist elastic member 26 is more easily maintained. Therefore, the fit of the waistband member 20 when wearing the napkin 2 can be improved. 【0148】 Furthermore, as shown in Figure 15, the non-skin side sheet 21 (first sheet) and the middle layer sheet 24 (third sheet) are joined together by intermittently applied hot melt adhesive (HMA). In other words, the non-skin side sheet 21 (first sheet) and the middle layer sheet 24 (third sheet) have portions that are joined to each other (portions where HMA is provided) and portions that are not joined to each other (portions where HMA is not provided). 【0149】With this configuration, when engaging or disengaging the engaging member 30 from the non-skin side of the waist member 20, the non-jointed portion between the non-skin side sheet 21 (first sheet) and the middle layer sheet 24 (third sheet) functions as a cushion, making it less likely for the waist elastic member 26 to be affected during attachment and detachment. In other words, compared to the case where the entire non-skin side sheet 21 (first sheet) and the middle layer sheet 24 (third sheet) are joined together to form a single unit, the impact when attaching and detaching the engaging portion 32 (hook 325) is more easily mitigated. As a result, damage to or cutting of the waist elastic member 26 is suppressed, and the elasticity of the waist elastic member 26 is more easily maintained. Therefore, the fit of the waist member 20 when wearing the napkin 2 can be further improved. 【0150】 ===Other=== The above embodiments are provided to facilitate understanding of the present invention and are not intended to limit the interpretation of the present invention. 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. 【0151】 In the above-described embodiment, a pair of perforations 25 (separation sections 25) were provided on both sides of the waist member 20 in the left-right direction, but the perforations 25 may be provided on only one side. In other words, the waist member 20 may be configured so that only one side in the left-right direction is separable front to back. 【0152】1. Napkin (pant-type absorbent item), 1a. Waist opening, 1b. Leg opening, 10. Absorbent body, 11. Absorbent core, 12. Top sheet, 13. Back sheet, 13a. Liquid impermeable sheet, 13b. Hydrophobic sheet, 18. Core wrap sheet, 20. Waist member, 20f. Front waist section, 20b. Rear waist section, 21. Non-skin side sheet (first sheet), 22. Skin side sheet (second sheet), 23. Skin side sheet (second sheet), 24. Middle layer sheet (third sheet), 25. Perforation (separation section), 25fe. Separation end, 25be. Separation end, 25a. Cut section, 25b. Non-cut section, 26. Waist elastic member, 26nc. Waist elastic member discontinuous section, 27. Buttock elastic member, 27nc. 30 Discontinuous portion of the buttock elastic member, 31 Engaging member, 31 Base sheet, 311 First base sheet, 312 Second base sheet, 32 Engaging portion, 325 Hook, 35 Base sheet fixing portion, 37 Folding guide wire, 40 Side joint, 40f Side joint (front side), 40b Side joint (rear side), 50 Crotch elastic member, 60 Leak-proof wall portion, 61 Leak-proof wall elastic member, 71 First base sheet compression portion (compression portion), 72 Second base sheet compression portion, 75 Front end compression portion, 76 Engaging portion compression portion, 80 High-density portion, CL Center position (longitudinal direction)

Claims

1. A pant-type absorbent article comprising: an absorbent body having an absorbent core that absorbs liquid and having intersecting vertical, horizontal, and thickness directions; a waist member having a front waist portion and a rear waist portion; an engaging member whose outer end in the horizontal direction is irremovably fixed to the waist member and whose inner end is removably engaged with the non-skin side of the waist member; and a crotch elastic member provided on the non-skin side of the absorbent core and which expands and contracts along the vertical direction, wherein the front waist portion and the rear waist portion are joined to each other at both ends in the horizontal direction by a pair of side joints, the engaging member having a convex shape that protrudes in a convex shape at only one point from the outside to the inside in the horizontal direction, the maximum length of the engaging member in the vertical direction being shorter than the length of the side joint and longer than half the length of the side joint, and the engaging member having an engaging portion with a plurality of hooks and a base sheet that supports the engaging portion. A pant-type absorbent article characterized in that, of the base sheet, a plurality of compression portions are provided on the surface facing the engaging portion in the thickness direction for compressing the base sheet in the thickness direction, there is a portion where the hook and the compression portion overlap when viewed in the thickness direction, the outer edge of the engaging member is curved inward in the left-right direction from the engaging portion, and in the up-down direction, the upper edge of the engaging portion and the upper edge of the engaging member are at the same position or the lower edge of the engaging portion and the lower edge of the engaging member are at the same position.

2. A pant-type absorbent article according to claim 1, characterized in that, when viewed in the thickness direction, the area of ​​the compression portion is larger than the area of ​​the hook.

3. A pant-type absorbent article according to claim 1 or 2, characterized in that, in the vertical direction, the distance between the upper end of the waist member and the upper end of the engaging member, or the distance between the lower end of the waist member and the lower end of the engaging member, is greater than the pitch of the compression portion.

4. A pant-type absorbent article according to claim 3, characterized in that, at the outer end of the waist member in the left-right direction, the distance between the upper end of the waist member and the upper end of the engaging member is greater than the pitch of the compression portion.

5. A pant-type absorbent article according to claim 3, characterized in that, at the outer end of the waist member in the left-right direction, the distance between the lower end of the waist member and the lower end of the engaging member is greater than the pitch of the compression portion.

6. A pant-type absorbent article according to claim 1 or 2, characterized in that, in the vertical and horizontal directions, the pitch of the compression portion is greater than the pitch of the hooks.

7. A pant-type absorbent article according to claim 1 or 2, characterized in that the average depth of the compression portion is greater than the average height of the hook.

8. A pant-type absorbent article according to claim 1 or 2, wherein the waist member comprises, in the region engaging with the engaging member, a first sheet provided on the non-skin side in the thickness direction, a second sheet provided on the skin side in the thickness direction, and a third sheet sandwiched between the first sheet and the second sheet, wherein a waist elastic member that expands and contracts in the left-right direction is provided between the second sheet and the third sheet, and the waist elastic member is not provided between the first sheet and the third sheet.

9. The absorbent pant-type article according to claim 8, characterized in that the first sheet and the third sheet have portions that are joined to each other and portions that are not joined to each other.

10. A pant-type absorbent article according to claim 1 or 2, characterized in that the engaging member has a folding guide line between the engaging portion and the side joint portion in the left-right direction, which causes the base sheet to be folded so that it is convex on the non-skin side in the thickness direction.

11. A pant-type absorbent article according to claim 1 or 2, wherein the front waist portion has a waist elastic member that expands and contracts in the left-right direction, and the waist elastic member has a discontinuous portion in the waist elastic member where the waist elastic member and the engaging member overlap in the vertical direction and in the central portion in the left-right direction, the waist elastic member is discontinuous in the left-right direction.

12. A pant-type absorbent article according to claim 1 or 2, comprising: a pair of leg openings; the waist member having a buttock elastic member that expands and contracts along the periphery of the leg openings; and having a discontinuous portion of the buttock elastic member in the left-right central portion, wherein the buttock elastic member is discontinuous in the left-right direction.

13. A pant-type absorbent article according to claim 1 or 2, wherein the waist member has a pair of separation portions on both sides in the left-right direction for separating the waist member front to back, and in an extended state, the distance from the center position of the pant-type absorbent article in the left-right direction to the separation portion on one side in the left-right direction is different from the distance from the center position of the pant-type absorbent article in the left-right direction to the separation portion on the other side in the left-right direction.

14. A pant-type absorbent article according to claim 1 or 2, wherein the engaging member has a tip compression portion at its inner end in the left-right direction, wherein a pattern of a predetermined shape is arranged at a predetermined pitch, and the average depth of the tip compression portion is greater than the average depth of the compression portion.

15. A pant-type absorbent article according to claim 14, wherein the engaging member has an engaging portion compression portion that compresses the engaging portion in the thickness direction, and when viewed in the thickness direction, at least a part of the hook overlaps with the engaging portion compression portion.

16. A pant-type absorbent article according to claim 15, characterized in that, when viewed in the thickness direction, the tip compression portion and the engaging compression portion have portions that overlap with each other and portions that do not overlap.

Images