Underpants-type absorbent article

Abstract

To achieve excellent fitness in an underpants-type absorbent article which can be used as a tape-type.SOLUTION: An underpants-type absorbent article (1) has an absorbent body (10) and a waist member (20) overlapped with a non-skin side of the absorbent body (10), and has a pair of separation parts (25) that separate the waist member (20) into a front body (20f) and a back body (20b). At both side parts in a left-right direction of one of the front body (20f) and the back body (20b), at least a pair of locking parts (32) which are removably locked to a predetermined region of the other of the front body (20f) and the back body (20b) are provided. The other of the front body (20f) and the back body (20b) has an expansion / contraction region (20EA) that can expand and contract in the left-right direction in a central position of the locking part (32) in a vertical direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Conventionally, there are known absorbent articles such as disposable diapers that can be used as a tape-type (unfolded type) by cutting off a part of a waistband member formed as a pants-type (shorts-type). For example, Patent Document 1 discloses a pants-type diaper that can be opened like a double door by providing a pair of break guide lines on the abdominal side of the exterior body and cutting the exterior body along the break guide lines. This pants-type diaper is a dual-use disposable diaper that can also be used as a tape-type diaper by using a fastening tape that is pulled out after opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-131197 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a dual-use disposable diaper such as that in Patent Document 1, when a part of the outer casing is cut from a pants-type state to be used as a tape-type state, there is a risk that the fit may deteriorate. For example, even if the diaper has a good fit around the waist when used as a pants-type diaper, when used as a tape-type diaper, the fit around the waist may be insufficient compared to that of a pants-type diaper, and there is a risk that the diaper may shift position or cause excrement leakage.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to achieve a good fit in a pants-type absorbent article that can also be used as a tape-type absorbent article. [Means for solving the problem]

[0006] The main invention for achieving the above-mentioned object is a pants-type absorbent article having an absorbent main body with a vertical direction, a horizontal direction, and a front-to-back direction that intersect with each other, and a waist member arranged overlapping the non-skin side of the absorbent main body, characterized in that the pants-type absorbent article has a pair of separation parts for separating the waist member into a front body and a rear body, and at least a pair of fastening parts are provided on both sides in the horizontal direction of one of the front body and the rear body that are removably fastened to a predetermined area of ​​the other of the front body and the rear body, and the other of the front body and the rear body has an elastic region at the center position of the fastening parts in the vertical direction that is elastic and stretchable along the left-to-right direction. Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0007] According to the present invention, it is possible to achieve a good fit in a pants-type absorbent article which can also be used as a tape-type absorbent article. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic perspective view of a napkin 1 according to a first embodiment. [Diagram 2] FIG. 2 is a plan view of the napkin 1 in an open and stretched state, as viewed from the skin side in the thickness direction. [Diagram 3] FIG. 3 is a schematic cross-sectional view of the line AA in FIG. 2. [Figure 4] 4A and 4B are diagrams illustrating the operation of separating the waistline member 20 of the napkin 1 into the front waistline member 20f and the rear waistline member 20b. [Diagram 5] 1 is a developed plan view of the napkin 1 with the front waistline member 20f and the rear waistline member 20b separated from each other. [Figure 6] FIG. 1 is a plan view showing the state in which the napkin 1 in the tape-shaped state has been reshaped into pants and stretched. [Figure 7] FIG. 2 is a plan view of the napkin 2 in an unfolded and extended state, as viewed from the skin side in the thickness direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] At least the following points will become apparent from the description of this specification and the accompanying drawings.

[0010] A pants-type absorbent article having an absorbent main body with vertical, horizontal, and front-to-back directions that intersect with each other, and a waistline member arranged overlapping the non-skin side of the absorbent main body, characterized in that the pants-type absorbent article has a pair of separation parts for separating the waistline member into a front body and a rear body, and at least a pair of fastening parts are provided on both sides in the left-to-right direction of one of the front body and the rear body that are removably fastened to a predetermined area of ​​the other of the front body and the rear body, and the other of the front body and the rear body has an elastic region at the center of the fastening parts in the vertical direction that is elastic and stretchable along the left-to-right direction.

[0011] In such a pants-type absorbent article, a contraction force acts in the left-right direction on the region between the pair of fastening parts in the waist-line member (front body) where the pair of fastening parts are fastened. In other words, in the waist-line opening where the front body and the rear body are connected in an annular shape by the pair of fastening parts, the fastening parts are pulled inward in the left-right direction, which makes the waist-line opening more likely to shrink. This makes it possible to achieve a good fit whether the absorbent article is used in the pants-type or tape-type form.

[0012] In such a pants-type absorbent article, it is desirable that the absorbent main body has an absorbent body elastic member that stretches along the longitudinal direction of the absorbent main body.

[0013] According to such a pants-type absorbent article, when worn, the absorbent body elastic member contracts, lifting the absorbent main body toward the wearer's skin, improving the fit and absorbency in the crotch area. In other words, the fit of the waist member around the wearer's waist area can be improved while the fit of the absorbent main body around the wearer's crotch area can be improved. This improves the fit of the absorbent article as a whole.

[0014] In such a pants-type absorbent article, it is desirable that the absorber elastic members are arranged in plurality at a predetermined interval in the left-right direction, and that the width in the left-right direction of the stretchable region is greater than the distance in the left-right direction between the absorber elastic member arranged at the furthest side in the left-right direction and the absorber elastic member arranged at the furthest side in the left-right direction.

[0015] In such a pants-type absorbent article, the range of contractile force acting on the front body by the elastic region in the left-right direction is wider than the range of contractile force acting on the absorbent main body by the absorber elastic member. Therefore, the contractile force of the elastic region is more likely to resist the pulling force of the absorber elastic member, and even if the absorbent main body is pulled downward by the contractile force of the absorber elastic member, the front body is less likely to be pulled down. This makes it easier to maintain a good fit.

[0016] In such a pants-type absorbent article, it is desirable that the absorbent main body has an absorbent core containing a highly absorbent polymer, and that the width of the stretchable region in the left-right direction is greater than the width of the absorbent core in the left-right direction.

[0017] In such a pants-type absorbent article, the range in the left-right direction over which the contractile force acts due to the elastic region is wider than the width of the absorbent core, so that even if the absorbent core is pulled downward by the contractile force of the absorber elastic member, the front body is less likely to be pulled down, making it easier to maintain a good fit.

[0018] In such a pants-type absorbent article, it is desirable that the width of the stretchable region in the left-right direction is greater than the width of the absorbent main body in the left-right direction.

[0019] In such a pants-type absorbent article, the range in the left-right direction over which the contractile force of the elastic region acts is wider than the width of the absorbent body, so that even if the absorbent body is pulled downward by the contractile force of the absorber elastic member, the front body is less likely to be pulled down. This makes it easier to maintain a good fit.

[0020] In such a pants-type absorbent article, it is desirable that a front upper end of the absorber elastic member is located lower than a lower end of the stretchable region in the vertical direction.

[0021] In such a pants-type absorbent article, the region on which the contraction force of the absorber elastic member acts and the stretched region do not overlap, so the contraction force of the absorber elastic member is less likely to act on the stretched region, and bending or the like is less likely to occur in the front body. Therefore, when the locking part is locked to the front body, the surface of the front body is more likely to be kept flat, making it easier to lock the locking part firmly. This can further improve the fit around the waist.

[0022] In such a pants-type absorbent article, it is desirable that a front upper end of the absorber elastic member is located lower than a lower end of the separation portion in the up-down direction.

[0023] In such a pants-type absorbent article, the area on which the contraction force of the absorber elastic member acts and the area between the pair of separation parts do not overlap each other, so that the contraction force of the absorber elastic member is less likely to act on the area between the pair of separation parts, and bending, etc. is less likely to occur in the area between the separation parts in the front body. Therefore, it is possible to easily perform the operation of separating the separation parts in the absorbent article in the pants-type state.

[0024] It is desirable for such a pants-type absorbent article to have a pair of side joints that join the front and rear pieces to each other at both ends in the left-right direction, and when the fastening parts are fastened to the waistband member, the fastening parts are located outside the absorber elastic member in the left-right direction and inside the side joints in the left-right direction.

[0025] In such a pants-type absorbent article, the region outside the absorber elastic members in the left-right direction and inside the side joints is less susceptible to the contraction force of the absorber elastic members. Therefore, by engaging the fastening parts in this region, the fastening action of the fastening parts can be more stable and easier. This allows the waistband member to fit better around the waist of the wearer.

[0026] In such a pants-type absorbent article, it is desirable that the stretchable region has a portion in the up-down direction that overlaps with both ends of the absorbent main body in the left-right direction.

[0027] In such a pants-type absorbent article, the left and right ends of the absorbent main body are easily pulled outward in the left and right direction by the elastic region. In other words, a force that widens the absorbent main body is applied, making it easier to suppress excretion leakage and making it difficult for the absorbent main body to float up from the wearer's body. Therefore, the fit of the absorbent main body when the absorbent article is worn can be improved.

[0028] In such a pants-type absorbent article, when viewed in the thickness direction in an unfolded and stretched state, it is desirable that the left-right contraction force of the stretch region in the portion where the stretch region overlaps with the absorbent main body is smaller than the left-right contraction force of the stretch region in the portion where the stretch region does not overlap with the absorbent main body.

[0029] According to such a pants-type absorbent article, excessive contraction force is unlikely to act on the portion overlapping with the absorbent main body in the thickness direction, and therefore, the absorbent main body is prevented from rippling, etc. This makes it easier for the absorbent main body to fit the wearer's skin in a surface-to-surface manner, and makes it easier to maintain a fit around the entire waist.

[0030] It is desirable for such a pants-type absorbent article to have a low-stretch area having lower stretchability than the stretch area, and for the low-stretch area to be positioned outside the stretch area in the left-right direction.

[0031] In such a pants-type absorbent article, wrinkles are less likely to form on the surface of the waistband member in the region where the low-elasticity region is provided outside the elastic region, which makes it easier to ensure the shape retention of the sheet member that constitutes the waistband member. Therefore, it becomes easier to smoothly peel off the fastening portion that is fastened around the periphery of the low-elasticity region from the waistband member.

[0032] In such a pants-type absorbent article, it is desirable that at least a portion of the low-elasticity region is positioned outside the elasticity region in the left-right direction and overlaps with the elasticity region in the up-down direction.

[0033] In such a pants-type absorbent article, since low-elasticity regions are provided on both sides of the elasticity region, the operation of peeling off the fastening portion that is fastened to the region overlapping with the low-elasticity region from the waistband member can be performed more smoothly.

[0034] In such a pants-type absorbent article, it is desirable that the width of the elasticated region in the left-right direction is greater than the width of the low-elasticated region in the left-right direction.

[0035] In such a pants-type absorbent article, the width of the elastic region in the left-right direction is wider than the width of the low elastic region in the left-right direction, which makes it easier to impart sufficient elasticity to the waist member. Therefore, the waist member is more likely to contract in the left-right direction in the region between the pair of fastening parts, which makes it possible to further improve the fit around the waist of the wearer.

[0036] In such a pants-type absorbent article, it is desirable that the entirety of the fastening portion overlaps with the stretchable region in the up-down direction.

[0037] In such a pants-type absorbent article, the contractile force of the stretchable region acts over the entire vertical direction of the fastening portion, making it easier for the waist member to be pulled inward in the left-right direction via the fastening portion, thereby improving the fit of the waist opening.

[0038] In such a pants-type absorbent article, it is desirable that the absorbent main body has an absorbent core containing a highly absorbent polymer, and that the lower end of the engagement portion is positioned higher than the upper end of the absorbent core in the vertical direction.

[0039] In such a pants-type absorbent article, since the highly rigid absorbent core and the fastening parts do not overlap in the vertical direction, the absorbent core is prevented from interfering with the stretching of the stretchable region in the region between the pair of fastening parts, making it easier to maintain a good fit of the waistband member.

[0040] It is desirable for such a pants-type absorbent article to have a tab provided with the fastening portion, and a tab joining portion for joining the tab to the waistband member outside the fastening portion in the left-right direction, and the fastening portion is provided with a hook member or loop member of a hook-and-loop fastener.

[0041] According to such a pants-type absorbent article, a user can easily grasp the tab to fasten and detach the fastening part to the waistband member. The fastening part is provided with a hook member or a loop member for fastening, and can be repeatedly attached and detached to and from the surface of the waistband member. Therefore, it is easy to adjust the fastening position when fastening the fastening part.

[0042] It is desirable for such a pants-type absorbent article to have a pair of side joints that join the front and rear pieces to each other at both ends in the left-right direction, the tab joints being located anywhere from the outer end of the absorbent main body to the side joints in the left-right direction, and the separation portion being disposed between the tab joints and the engaging portion.

[0043] With such a pants-type absorbent article, when a user separates the separation part, the user can easily separate the separation part by grasping the tab with one hand and the waistband member with the other hand and pulling them in opposite directions, which makes it easier to remove the absorbent article from the wearer's body and to transform the absorbent article from a pants-type to a tape-type.

[0044] In such a pants-type absorbent article, it is desirable that the rear body has leg-opening elastic members stretchable in the left-right direction along a lower edge of the rear body.

[0045] According to such a pants-type absorbent article, the absorbent article is given elasticity along the leg openings, and the leg openings easily fit around the legs of the wearer. In particular, in the rear body, the leg openings are likely to rise up from the buttocks or become misaligned due to the influence of the protruding buttocks of the wearer, so by providing the leg elastic members, it is possible to improve the fit around the legs of the rear body and reduce the discomfort to the wearer.

[0046] In such a pants-type absorbent article, it is desirable that the absorbent main body has an absorbent elastic member that stretches along the longitudinal direction of the absorbent main body, and that the stress in the left-right direction of the stretchable region is greater than the stress in the up-down direction of the region in which the absorbent elastic member is arranged.

[0047] In such a pants-type absorbent article, the stress in the stretchable region is greater than the stress in the absorbent elastic member, so that the waist member is less likely to shift in position against the force of the absorbent elastic member pulling the upper end of the absorbent main body downward, making it easier to maintain the fit of the waist member around the wearer's waist.

[0048] In such a pants-type absorbent article, it is desirable that the other of the front body and the rear body has the stretchable region over the entire area between the upper and lower ends of the fastening portions in the vertical direction and between the inner ends of the pair of fastening portions in the left-right direction.

[0049] In such a pants-type absorbent article, the entire rectangular region sandwiched between the pair of left and right fastening parts shrinks in the left-right direction, and both left and right ends of the back body are easily pulled inward via the pair of fastening parts, which causes the waist opening to shrink and fit better around the wearer's waist, making it less likely to shift out of position.

[0050] In such a pants-type absorbent article, it is desirable that the absorbent main body has an absorbent elastic member that stretches along the longitudinal direction of the absorbent main body, and that in the longitudinal direction, the length of the absorbent elastic member behind the central position is longer than the length of the absorbent elastic member in front of the central position.

[0051] According to such a pants-type absorbent article, the contraction force of the absorbent elastic member acts on the buttocks side of the wearer, making it easier for the absorbent main body to fit securely in the cleft of the buttocks, thereby improving the fit of the pants-type absorbent article and making it possible to suppress leakage of excretory fluids such as menstrual blood.

[0052] In such a pants-type absorbent article, it is desirable that the rear body has a tab on which the fastening portion is provided, and that in the vertical direction, the upper end of the rear side of the absorber elastic member is positioned higher than the lower end of the tab.

[0053] With such a pants-type absorbent article, when the wearer grasps the tab and pulls it left and right to engage it with the front waist member, the rear upper end portion of the absorbent elastic member is pulled left and right, making it less likely that the rear region of the absorbent body will slip downward, and the contractile force of the absorbent elastic member makes it easier for the absorbent body to fit into the groove of the wearer's buttocks.

[0054] It is desirable for such a pants-type absorbent article to have a front leg elastic member along the lower edge portion of the front body in the vertical direction, and a rear leg elastic member along the lower edge portion of the rear body in the vertical direction, and the length of the front leg elastic member in the left-right direction is shorter than the length of the rear leg elastic member in the left-right direction.

[0055] According to such a pants-type absorbent article, regions are provided at both left and right ends of the front waistline member where the contractile force of the front leg elastic members does not act, making the article less likely to contract. This provides gripping margins at the left and right ends of the front waistline member, making it easier to engage the tabs provided on the rear waistline member. This makes it easier to put on the pants-type absorbent article and make it easier to fit the article to the body.

[0056] In such a pants-type absorbent article, it is preferable that an upper end of the front leg elastic member is located lower than a lower end of the engaging portion in the vertical direction.

[0057] In such a pants-type absorbent article, the contractile force of the front leg elastic member is less likely to act on the area of ​​the front waist member that engages the fastening portion, making it easier to perform the tab fastening operation. Also, since the stretchability of the front leg elastic member is less likely to be interfered with by the fastening portion, the leg openings of the front waist member are more likely to fit the wearer's groin.

[0058] In such a pants-type absorbent article, it is desirable that a functional material containing at least one of a cooling agent, a warming agent, and a fragrance is provided in a predetermined region of at least one of the absorbent main body and the waistband member.

[0059] Such pants-type absorbent article can provide the wearer with a cooling effect, a warming effect, or the like.

[0060] ===First embodiment=== As an example of a pants-type (shorts-type) absorbent article according to the first embodiment of the present invention, a pants-type napkin 1 (hereinafter, simply referred to as "napkin 1") will be described. Note that pants-type absorbent articles also include pants-type diapers and pants-type absorbent pads.

[0061] <Basic structure of Sanitary Napkin 1> Fig. 1 is a schematic perspective view of a napkin 1 according to a first embodiment. Fig. 2 is a plan view of the napkin 1 in an open and extended state, as viewed from the skin side in the thickness direction. Fig. 3 is a schematic cross-sectional view taken along line AA in Fig. 2.

[0062] The "stretched state" of the napkin 1 refers to the state in which the entire napkin 1 (the entire product) is stretched without wrinkles by stretching each elastic member of the napkin 1 (for example, the absorbent elastic member 50 and the skin-side sheets 22 and 23 described below, etc.); specifically, the state in which each member constituting the napkin 1 (for example, the non-skin-side sheet 21 and the skin-side sheets 22 and 23 described below, etc.) is stretched until the dimensions of the member alone match or are close to those dimensions.

[0063] As shown in FIG. 1, the napkin 1 has a "vertical direction", a "lateral direction", and a "front-rear direction" that are perpendicular to each other. Also, as shown in FIG. 3, the napkin 1 has a "thickness direction" in which each member is layered. In the vertical direction, the side that is the wearer's waist when the wearer wears the napkin 1 is referred to as the "upper side", and the side that is the wearer's crotch side is referred to as the "lower side". In the front-rear direction, the side that is the wearer's stomach when worn is referred to as the "front side", and the side that is the wearer's back is referred to as the "rear side". In the thickness direction, the side that comes into contact with the wearer's skin when the wearer wears the napkin 1 is referred to as the "skin side", and the opposite side is referred to as the "non-skin side".

[0064] Furthermore, the napkin 1 has a "vertical direction" and a "horizontal direction" that are perpendicular to each other in the unfolded state shown in Fig. 2. The "vertical direction" is the direction along the up-down direction of the pants-type napkin, and the "horizontal direction" is the direction along the left-right direction of the pants-type napkin.

[0065] The napkin 1 of this embodiment comprises a liquid-absorbent body 10 that absorbs excretory liquids such as menstrual blood, a waistline member 20 that is placed over the non-skin side of the absorbent body 10 and is placed around the wearer's waist when the napkin 1 is worn, and tabs 30 provided on both the left and right sides of the waistline member 20.

[0066] (Absorbent body 10) As shown in FIG. 2, the absorbent body 10 has a generally rectangular shape in plan view, with the vertical direction (corresponding to the "longitudinal direction" of the absorbent body 10 in a stretched state) aligned with the top-bottom direction of the napkin 1. As shown in FIG. 3, the absorbent body 10 has an absorbent core 11 aligned with the vertical direction (top-bottom direction), a top sheet 12 arranged closer to the skin than the absorbent core 11, and a back sheet 13 arranged closer to the skin than the absorbent core 11. However, the absorbent body 10 may have other sheet members. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction. In addition, an absorbent body elastic member 50, which will be described later, is provided between the absorbent core 11 and the back sheet 13.

[0067] The absorbent core 11 is a member that absorbs and retains liquids such as menstrual blood, and is formed of liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP). The outer peripheral surface of the absorbent core 11 may be covered with a liquid-permeable sheet member (core wrap sheet) such as tissue paper or nonwoven fabric.

[0068] The top sheet 12 is a liquid-permeable sheet member that can come into contact with the wearer's skin when worn, and is formed, for example, from a hydrophilic air-through nonwoven fabric or a spunbond nonwoven fabric.

[0069] The back sheet 13 is formed in a two-layer structure including a liquid-impermeable sheet 13a for preventing liquid such as menstrual blood absorbed in the absorbent core 11 from leaking out to the outside, and a hydrophobic sheet 13b arranged on the non-skin side of the liquid-impermeable sheet 13a. For example, a resin film is used as the liquid-impermeable sheet 13a, and for example, a flexible nonwoven fabric is used as the hydrophobic sheet 13b. However, the hydrophobic sheet 13b is not necessarily provided, and the back sheet 13 may be composed of only the liquid-impermeable sheet 13a.

[0070] Furthermore, leakage preventing walls (not shown) may be provided on both the left and right sides of the absorbent main body 10. The leakage preventing walls are portions that correspond to so-called three-dimensional gathers, and when the napkin 1 is worn, the leakage preventing walls rise up from both the left and right sides of the absorbent main body 10 toward the wearer's skin, thereby preventing excreted liquid such as menstrual blood from leaking out of the absorbent main body 10.

[0071] As shown in Fig. 2 and Fig. 3, the absorbent body 10 of this embodiment is provided with a plurality of absorbent body elastic members 50 that stretch along the vertical direction (up-down direction). The absorbent body elastic members 50 are made of, for example, rubber thread, and are arranged on the non-skin side of the absorbent core 11 (between the back sheet 13 and the absorbent core 11 in Fig. 3) in a state of stretching in the vertical direction (up-down direction). In the napkin 1 of this embodiment, five absorbent body elastic members 50 are provided at a predetermined interval in the left-right direction (see Fig. 2). The stretch ratio of the absorbent body 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 stretch ratio of the absorbent body elastic members 50 to a relatively high ratio, the absorbent body 10, which has a relatively high rigidity, is contracted from the non-skin side in the thickness direction, and the absorbent body 10 can be easily fitted to the wearer's body when the napkin 1 is worn. In other words, the elasticity exhibited by the absorbent elastic member 50 lifts the absorbent body 10 toward the wearer's skin, making it easier for the absorbent body 10 to adhere closely to the wearer's crotch area, thereby making it less likely for excretory fluids such as menstrual blood to leak.

[0072] (Waist member 20) The waistline member 20 is an exterior body composed of multiple sheet members, and includes at least a non-skin side sheet 21 and skin side sheets 22, 23 (see FIG. 3). In the following description, the portion of the waistline member 20 that is in front of the center position CL (ventral side) in the vertical direction is also called the front waistline member 20f, and the portion that is behind the center position CL (dorsal side) is also called the rear waistline member 20b. The front waistline member 20f is a portion that touches the ventral side of the wearer's body when the napkin 1 is worn, and corresponds to the "front body" of the napkin 1. The rear waistline member 20b is a portion that touches the dorsal side of the wearer's body when the napkin 1 is worn, and corresponds to the "rear body" of the napkin 1.

[0073] The non-skin side sheet 21 is a non-elastic sheet member arranged on the closest side to the skin of the napkin 1, and is made of, for example, a spunbond nonwoven fabric, an SMS nonwoven fabric, etc. In this embodiment, the non-skin side sheet 21 has a shape that is narrowed toward the inside in the left-right direction at the longitudinal center (part including the central position CL) as shown in the plan view of Fig. 2.

[0074] The skin-side sheet 22 is an elastic sheet member laminated on the skin-side of the non-skin-side sheet 21 at the front side (ventral side) in the longitudinal direction. The skin-side sheet 22 is formed of, for example, elastic nonwoven fabric. The "elastic nonwoven fabric" refers to a nonwoven fabric that contains elastic fibers having elasticity and extensible fibers having lower shrinkage than the elastic fibers, and that has been subjected to an appropriate stretching process such as gear stretching. The skin-side sheet 22 of this embodiment can use, as the elastic fibers, fibers of a polyurethane-based elastomer, which is a type of thermoplastic elastomer having elasticity, and can use, as the extensible fibers, fibers of polypropylene (PP), which is a type of thermoplastic resin having inelasticity.

[0075] The skin side sheet 22 is joined to the non-skin side sheet 21 by a plurality of sheet joints (not shown) scattered therebetween, which impart stretchability at least along the left-right direction to the front waistline member 20f. In this embodiment, the sheet joints are formed by a known joining means such as ultrasonic welding.

[0076] The skin side sheet 23 is a stretchable sheet member laminated on the skin side of the non-skin side sheet 21 at the rear side (back side) in the longitudinal direction. The skin side sheet 23 has a structure similar to that of the skin side sheet 22. That is, the skin side sheet 23 is formed of a stretchable nonwoven fabric, and is joined to the non-skin side sheet 21 by a plurality of scattered sheet joints (not shown). This provides the rear waistline member 20b with stretchability at least in the left-right direction.

[0077] Note that sheet members constituting the waistline member 20 may include sheet members other than the non-skin side sheet 21 and the skin side sheets 22, 23. For example, the waistline member 20 may have a three-layer structure in which a non-stretchable nonwoven fabric is disposed on the skin side of the stretchable skin side sheets 22, 23, and the stretchable nonwoven fabric is sandwiched between the non-stretchable nonwoven fabrics.

[0078] The napkin 1 is folded in half in the vertical direction (front-rear direction) from the unfolded state shown in Fig. 2, with the center position CL in the vertical direction (shown by a dashed line in Fig. 2) as the folding position, so that the skin side of the front waistline member 20f (front body) and the skin side of the rear waistline member 20b (rear body) face each other. In this folded state, both lateral (left-right) ends 40f, 40f of the front waistline member 20f overlapping in the front-rear direction and both lateral (left-right) ends 40b, 40b of the rear waistline member 20b are joined by a known joining means such as seal welding to form a side joining portion 40. As a result, the waistline members 20 (20f and 20b) folded in half are connected in a ring shape at the front side (ventral side) and the rear side (back side), forming one waistline opening 1a and a pair of leg openings 1b as shown in Fig. 1, and forming a pants-type napkin 1.

[0079] (Tab 30) A pair of tabs 30 are provided on both left and right sides of the napkin 1. The tabs 30 each have a base sheet 31 and a locking portion 32.

[0080] The base sheet 31 is a sheet member made of nonwoven fabric or the like, and one side in the left-right direction is joined to the waistline member 20 by a tab joint 35, and the other side in the left-right direction is provided with a locking portion 32 (see FIG. 2). In this embodiment, the side joint 40 of the waistline member 20 described above also serves as the tab joint 35. That is, the front waistline member 20f, the rear waistline member 20b, and the tab 30 are integrally joined by the side joint 40. However, the tab joint 35 may be provided separately from the side joint 40. For example, the tab 30 may be joined by the tab joint 35 to a predetermined region of the front waistline member 20f or the rear waistline member 20b other than the side joint 40. The tab joint 35 may be formed by ultrasonic welding or the like like the side joint 40, or may be formed using an adhesive such as a hot melt adhesive.

[0081] The locking portion 32 is a locking member for removably locking the tab 30 to the waistband member 20, and is provided in a predetermined region of the skin side of the tab 30 (the region opposite the tab joint portion 35 in the left-right direction). In this embodiment, the locking portion 32 is a hook-and-loop fastener made of, for example, polypropylene, and provided with a plurality of locking hook members (locking projections not shown) on the skin side. These locking projections are hooked to fibers (loops) of a nonwoven fabric constituting the non-skin side sheet 21 provided on the outermost layer of the waistband member 20, so that the locking portion 32 (tab 30) is removably locked to the non-skin side of the waistband member 20. However, a configuration may be adopted in which a hook member for locking is provided on the waistband member 20 side, and a loop member for hooking the hook member is provided on the locking portion 32 side.

[0082] As shown in FIG. 1, in the napkin 1 in the pants-type state, the fastening portion 32 of the tab 30 is fastened to the front waistline member 20f in an area laterally inside the tab joint 35 (side joint 40).

[0083] <About putting on and taking off Sanitary Napkin 1> Next, a description will be given of the operation of putting on and taking off the napkin 1. In the initial state, the napkin 1 is in a pants-type (shorts-type) form as shown in Fig. 1, and can be worn as a normal pants-type absorbent article. When removing the napkin 1 from the body, the waistline member 20, which is formed in a ring shape along the waistline of the wearer, can be separated into the front waistline member 20f and the rear waistline member 20b, and the napkin 1 can be unfolded and removed.

[0084] Figures 4A and 4B are diagrams illustrating the operation of separating the waistline member 20 of the napkin 1 into a front waistline member 20f and a rear waistline member 20b. Figure 4A is a schematic cross-sectional view showing the napkin 1 in a pants-type state as viewed from the upper side (the side of the waistline opening 1a) in the up-down direction, and Figure 4B is a schematic cross-sectional view showing the state in Figure 4A where the front waistline member 20f and the rear waistline member 20b have been separated.

[0085] In the pants-type napkin 1, the front waistline member 20f and the rear waistline member 20b are joined to each other at side joints 40, 40 provided at both left and right ends to form an annular waistline opening 1a as shown in Fig. 4A. A pair of tabs 30 are provided on both left and right sides of the waistline member 20, and the tabs 30 are fastened to the non-skin side of the front waistline member 20f by fastening parts 32.

[0086] In addition, in Fig. 4A, a pair of separation parts 25 are provided on both sides in the left-right direction of the front waistline member 20f. The separation parts 25 are provided to separate the waistline member 20, which is formed in a ring shape along the waistline of the wearer, into the front waistline member 20f and the rear waistline member 20b, and are provided in any of the regions from the side joint parts 40 to the parts where the locking parts 32 are locked in the left-right direction. In Fig. 4A, the separation parts 25 are provided in a region between the side joint parts 40 and the locking parts 32 in the left-right direction, at a position closer to the side joint parts 40 than the locking parts 32. The separation parts 25 are, for example, perforations along the up-down direction (see Fig. 2), and the waistline member 20 can be easily separated into the front waistline member 20f and the rear waistline member 20b by tearing the waistline member 20 along the perforations.

[0087] In addition, since the side joints 40 of the napkin 1 are formed by ultrasonic welding, the rigidity of the side joints 40 is higher than that of other regions of the waistline member 20. Therefore, it is also possible to tear the waistline member 20 along the inner ends in the left and right direction of the side joints 40, where the rigidity difference is large in the waistline member 20. In this case, since the inner ends of the side joints 40 become the separation portions 25, it is not necessarily necessary to provide perforations or the like.

[0088] Also, in order to facilitate the separation operation, the separation portion 25 may be formed by previously connecting the front waistline member 20f and the rear waistline member 20b in a separable manner. For example, the front waistline member 20f and the rear waistline member 20b may be partially laminated in the thickness direction, and the laminated portions may be weakly bonded or connected by hooks and fastenings, thereby making the waistline member 20 separable. Also, the front waistline member 20f and the rear waistline member 20b may be connected by a predetermined connecting member, and the waistline member 20 may be separable by removing the connecting member from the connected side.

[0089] In addition, by weakly bonding the laminated portion of the front waistline member 20f and the base sheet 31 of the tab 30, the bond between the tab joint 35 (side joint 40) and the base sheet 31 can be maintained, while making it easy to separate the front waistline member 20f and the base sheet 31 at the separation portion 25.

[0090] The napkin 1 in which the waistline member 20 is separated into the front waistline member 20f and the rear waistline member 20b at the separation portion 25 is in the state shown in FIG. 4B. That is, the separation portion 25 in FIG. 4A is separated into a separation end 25fe on the front waistline member 20f side and a separation end 25be on the rear waistline member 20b side, and the front waistline member 20f and the rear waistline member 20b are separated in the front and rear directions. In FIG. 4B, a pair of tabs 30, 30 are joined to the rear waistline member 20b via tab joints 35 (side joints 40) on both the left and right sides, and the locking portions 32, 32 provided on the tabs 30, 30 are respectively locked to the front waistline member 20f. As a result, the waistline member 20 is formed into a ring shape. When the napkin 1 in this state is to be removed from the wearer's body, the fastening portion 32 is peeled away from the front waistline member 20f, whereby the napkin 1 is unfolded and can be easily removed.

[0091] 5 is an expanded plan view of the napkin 1 with the front waistline member 20f and the rear waistline member 20b separated. The separated napkin 1 can be used as a so-called tape-type napkin in which tabs 30 with fastening parts 32 are provided on both the left and right sides of the rear waistline member 20b (rear body). In other words, the napkin 1 of this embodiment can be used as both a pants-type and a tape-type.

[0092] Although conventional pants-type napkins have a good fit, they are difficult to put on and take off in a restroom or the like when going out. For example, when removing a used napkin and putting on a new one while going out, it is necessary to put on and take off the pants-type napkin by inserting the toes through the leg openings of the napkin and pulling it up to the crotch side, which makes it difficult for the wearer to put on and take off the napkin in an environment where it is difficult to take off pants or shoes.

[0093] In contrast, with the napkin 1 of this embodiment, the napkin 1 can be easily removed by separating the waistline member 20 at the separation portion 25. In addition, by separating the waistline member 20 of a new napkin 1 in advance at the separation portion 25 and leaving it in an unfolded state, it can be used as a tape-type napkin, so that it can be easily put on and taken off even in an environment where it is difficult to take off pants or shoes.

[0094] The napkin 1 of this embodiment can achieve a good fit similar to that of a pants-type napkin even when used as a tape-type napkin. Fig. 6 is a plan view showing the state in which the napkin 1 in the tape-type state is stretched again into a pants-type napkin. Fig. 6 shows the state in which the napkin 1 in the unfolded and stretched state shown in Fig. 5 is folded in half at the center position CL in the vertical direction (longitudinal direction) and the pair of fastening parts 32, 32 are fastened to the front waist member 20f (front body) to form the pants-type napkin.

[0095] In the napkin 1, the front waistline member 20f is stretchable in the left-right direction due to the stretchability exhibited by the skin side sheet 22, which is stretchable in the left-right direction. Therefore, when a pair of fastening parts 32, 32 are fastened to the front waistline member 20f (front body part) as shown in Fig. 6, the area between the fastening parts 32, 32 stretches in the left-right direction. When the fastening parts 32 are fastened, the front waistline member 20f has at least a stretchable area 20EA (shown by a shaded area in Fig. 6) that is stretchable in the left-right direction at the central position 32C in the up-down direction of the fastening parts 32.

[0096] That is, when the fastening parts 32, 32 are fastened in the front waistline member 20f (front body), a contraction force acts in the left-right direction in the area between them. Therefore, both left-right ends of the rear waistline member 20b are pulled inward via the pair of fastening parts 32, 32, and the waistline opening 1a formed in a ring shape by the front waistline member 20f and the front waistline member 20f is likely to shrink. That is, a contraction force as shown by the arrow in FIG. 4B acts on the front waistline member 20f, and the waistline opening 1a shrinks. Therefore, the waistline opening 1a fits tightly along the waistline of the wearer, and is less likely to shift out of position. As a result, a good fit can be achieved whether the napkin 1 is used in the pants-type or tape-type form.

[0097] The absorbent main body 10 of the napkin 1 is provided with an absorbent body elastic member 50 that stretches along its longitudinal direction (vertical direction). As described above, when the napkin 1 is worn, the absorbent body elastic member 50 contracts, lifting the absorbent main body 10 toward the wearer's skin, thereby improving the fit and absorbency in the crotch area. That is, in this embodiment, the stretchability of the stretchable region 20EA improves the fit of the waistline member 20 around the wearer's waist, while the stretchability of the absorbent body elastic member 50 improves the fit of the absorbent main body 10 around the wearer's crotch area. This improves the fit of the napkin 1 as a whole.

[0098] Furthermore, the width W20EA in the left-right direction of the stretchable region 20EA provided in the front waistline member 20f is greater than the width W50 in the left-right direction of the absorber elastic member 50 provided in the absorber main body 10 (see FIG. 6). Here, the width W50 in the left-right direction of the absorber elastic member 50 is represented by the distance between the absorber elastic member 50 arranged on the most one side in the left-right direction (e.g., the left side) and the absorber elastic member 50 arranged on the most other side in the left-right direction (e.g., the right side) among the multiple absorber elastic members 50 as shown in FIG. 6. With this configuration, the range of the contractile force due to the stretchable region 20EA acting on the front waistline member 20f in the left-right direction is wider than the range of the contractile force due to the absorber elastic member 50 acting on the absorber main body 10. Therefore, even if the upper end of the absorbent main body 10 is pulled downward by the contractile force of the absorber elastic member 50, the contractile force of the stretchable region 20EA tends to resist the pulling force of the absorber elastic member 50, and the front waistline member 20f is less likely to be pulled downward. This makes it easier to maintain a good fit of the napkin 1.

[0099] Also, the width W20EA in the left-right direction of the stretchable region 20EA is greater than the width W11 (maximum width of the absorbent core 11) in the left-right direction of the absorbent core 11 (see FIG. 6). That is, the range in the left-right direction over which the contractile force of the stretchable region 20EA acts is greater than the width of the absorbent core 11. Therefore, even if the entire absorbent core 11 in the left-right direction is pulled downward by the contractile force of the absorber elastic member 50, the contractile force of the stretchable region 20EA is more likely to resist the pulling force of the absorbent core 11, and the front waistline member 20f is less likely to be pulled down. This makes it easier to maintain the good fit of the napkin 1.

[0100] Furthermore, the width W20EA in the left-right direction of the stretchable region 20EA is greater than the width W10 in the left-right direction of the absorbent main body 10 (see FIG. 6). In other words, the range in which the contractile force of the stretchable region 20EA acts in the left-right direction is greater than the maximum width of the absorbent main body 10. Therefore, even if the entire absorbent main body 10 in the left-right direction is pulled downward by the contractile force of the absorber elastic member 50, the contractile force of the stretchable region 20EA becomes more likely to resist the pulling force of the absorbent main body 10, and the front waistline member 20f is less likely to be pulled down. This makes it easier to maintain the good fit of the napkin 1.

[0101] As shown in FIG. 6, the upper end 50et of the front side (ventral side) of the absorber elastic member 50 is located below the lower end 20EAeb of the stretched region 20EA in the vertical direction. That is, the region on which the contraction force of the absorber elastic member 50 acts and the stretched region 20EA do not overlap each other, and the contraction force of the absorber elastic member 50 is unlikely to act on the stretched region 20EA. With this configuration, the contraction force of the absorber elastic member 50 is unlikely to interfere with the stretched region 20EA, so that the front waistline member 20f is unlikely to bend. As a result, when the napkin 1 in the tape-type state is worn, when the front waistline member 20f is engaged with the engaging portion 32, the front waistline member 20f is likely to be kept flat, and the engaging portion 32 can be easily engaged. Therefore, the fit of the napkin 1 around the waist of the wearer can be further improved.

[0102] 6, in the vertical direction, the upper end 50et of the front side (ventral side) of the absorber elastic member 50 is located below the lower end 25eb of the separation portion 25 (separation end 25fe of the front waistline member 20f). That is, the area on which the contraction force of the absorber elastic member 50 acts and the area between the pair of separation portions 25, 25 do not overlap with each other, and the contraction force of the absorber elastic member 50 is unlikely to act on the area between the separation portions 25, 25. With this configuration, the contraction force of the absorber elastic member 50 is unlikely to interfere, so that bending or the like is unlikely to occur in the area between the separation portions 25, 25 of the front waistline member 20f. This makes it easier to perform the operation of separating the separation portion 25 (separating the front waistline member 20f and the rear waistline member 20b) in the napkin 1 in the pants-type state. For example, if the separation portion 25 is a perforation, the operation of breaking the perforation can be stably performed. Therefore, the napkin 1 can be easily put on and taken off even when the user is away from home.

[0103] In addition, when the locking portion 32 is locked to the waistband member 20, it is desirable that the locking portion 32 is located in an area that is outboard of the absorber elastic member 50 in the left-right direction and inboard of the side joint portion 40 of the waistband member 20 in the left-right direction. As shown in FIG. 6, the locking portion 32 is locked to an area on the inside in the left-right direction of the waistband member 20 (the front waistband member 20f). At this time, if the locking portion 32 is locked to an area that overlaps with the absorber elastic member 50 in the left-right direction, this area may be pulled downward by the influence of the contraction force of the absorber elastic member 50, which may make it difficult to perform a stable locking operation. On the other hand, if the locking portion 32 is locked to an area that is outboard of the absorber elastic member 50 in the left-right direction and inboard of the side joint portion 40, this area is less susceptible to the influence of the contraction force of the absorber elastic member 50, which makes it easier to perform the locking operation of the locking portion 32 more stably. This allows the waist member 20 to fit more snugly around the wearer's waist.

[0104] In addition, it is desirable that both ends 10s, 10s of the absorbent body 10 in the left-right direction overlap with the stretchable region 20EA. In other words, it is desirable that at least a part of both ends 10s of the absorbent body 10 overlap with the stretchable region 20EA in the up-down direction. With such a configuration, the end 10s in the left-right direction of the absorbent body 10 is easily pulled outward in the left-right direction by the stretchability of the stretchable region 20EA. That is, a force that widens the absorbent body 10 acts, making it easier to suppress excretion leakage, and the absorbent body 10 is less likely to float up from the wearer's body, making it easier to adhere to the wearer's skin. Therefore, the fit of the absorbent body 10 when the napkin 1 is worn can be further improved.

[0105] In addition, it is desirable that the entirety of the locking portion 32 overlaps with the stretchable region 20EA in the vertical direction. With this configuration, the contractile force of the stretchable region 20EA acts over the entirety of the locking portion 32 in the vertical direction, so that the rear waistline member 20b is easily pulled inward in the left-right direction via the pair of locking portions 32, 32, and the fit of the waistline opening 1a around the wearer's waistline can be further improved. In this embodiment, as shown in Fig. 6, the entirety of the locking portion 32 in the vertical direction overlaps with the stretchable region 20EA, so that the fit of the wearer's waistline can be sufficiently improved when the napkin 1 is worn.

[0106] In addition, it is preferable that the lower end 32eb of the locking portion 32 is located above the upper end 11et of the absorbent core 11 in the vertical direction. In other words, it is preferable that the locking portion 32 and the absorbent core 11 do not have an overlapping portion in the vertical direction. The absorbent core 11 has a higher rigidity than the waistband member 20 because it contains a superabsorbent polymer (SAP) or the like. Therefore, if the absorbent core 11 is present between a pair of locking portions 32, 32 locked to the waistband member 20, the rigidity of the absorbent core 11 may prevent the stretching of the stretchable region 20EA in the left-right direction, making it difficult for a contraction force to act between the pair of locking portions 32, 32. In this case, the contraction force of the waistband opening 1a is weakened, and the fit around the waist of the wearer is likely to deteriorate. 6, in the napkin 1, the lower end 32eb of the fastening portion 32 is located above the upper end 11et of the absorbent core 11 in the vertical direction, so that the absorbent core 11 is prevented from interfering with the stretching of the stretchable region 20EA in the region between the fastening portions 32, 32. This makes it easier to maintain a good fit of the waistline member 20.

[0107] In addition, when the napkin 1 in the expanded and stretched state as shown in FIG. 6 is viewed in the thickness direction, it is desirable that the contractile force in the left-right direction of the stretchable region 20EA in the portion overlapping with the absorbent main body 10 is smaller than the contractile force in the left-right direction of the stretchable region 20EA in the portion not overlapping with the absorbent main body 10. If an excessive contractile force acts on the region of the waistband member 20 overlapping with the absorbent main body 10 in the thickness direction, the highly rigid absorbent main body 10 may become wavy, which may make it difficult to fit snugly to the wearer's body. Therefore, in the region of the stretchable region 20EA overlapping with the absorbent main body 10, the contractile force in the left-right direction is made smaller than that of the region not overlapping with the absorbent main body 10, for example, by cutting a part of the skin-side sheets 22, 23 (elastic nonwoven fabric). This prevents the absorbent main body 10 from being subjected to an excessive contractile force, making it easier to maintain a fit around the entire waistband. The magnitude of the contractile force in the left-right direction of the stretchable region 20EA refers to the magnitude of the force that acts when a target region of the stretchable region 20EA is stretched by a unit length in the left-right direction.

[0108] In addition, in the napkin 1 of this embodiment, the tab 30 having the locking portion 32 is joined to the waistline member 20 via the tab joint 35 on the outer side of the locking portion 32 in the left-right direction. Therefore, the user (wearer) of the napkin 1 can easily perform the operation of locking the locking portion 32 to the waistline member 20 or detaching it by grabbing the part of the tab 30 where the locking portion 32 is provided. The locking portion 32 is provided with a hook member for locking or a loop member for hooking the hook member, and can be repeatedly attached to and detached from the non-skin side surface of the waistline member 20. Therefore, the locking position can be easily adjusted during the operation of locking the locking portion 32. These configurations make it easier to connect and adjust the front waistline member 20f and the rear waistline member 20b, and the waistline opening 1a can be easily fitted to the waistline of the user (wearer).

[0109] Moreover, the tab joint 35 is provided at any position from the outer end of the absorbent main body 10 to the side joint 40 of the waistline member 20 in the left-right direction, and the separation portion 25 is disposed in the region between the tab joint 35 and the locking portion 32 in the left-right direction. In the napkin 1 of this embodiment, as described in FIG. 4, the tab joint 35 is provided at the same position as the side joint 40, and the separation portion 25 is disposed between the tab joint 35 and the locking portion 32 in the left-right direction. Therefore, when a user performs an action to separate the separation portion 25, the user can easily separate the separation portion 25 by grasping the tab 30 with one hand and the waistline member 20 (the front waistline member 20f) with the other hand and pulling them in opposite directions. 4A, for example, by holding the front waist member 20f with one hand and pulling the tab 30 (the fastening portion 32) toward the non-skin side with the other hand, the force is concentrated on the separation portion 25, and the waist member 20 can be easily torn apart. This makes it easier to remove the napkin 1 from the wearer's body and to transform the napkin 1 from a pants-type to a tape-type.

[0110] As shown in Fig. 2, the front waistband member 20f is provided with a front leg elastic member 28 along the lower edge in the up-down direction (i.e., the outline of the leg openings 1b). The front leg elastic member 28 is an elastic member such as rubber thread, and is arranged between the non-skin side sheet 21 and the skin side sheet 22 in the thickness direction, stretching from one side to the other in the left-right direction (see Figs. 2, 3, etc.). Similarly, the rear waistband member 20b is provided with a rear leg elastic member 29 along the lower edge in the up-down direction (i.e., the outline of the leg openings 1b). The rear leg elastic member 29 is an elastic member such as rubber thread, and is arranged between the non-skin side sheet 21 and the skin side sheet 23 in the thickness direction, stretching from one side to the other in the left-right direction (see Figs. 2, 3, etc.).

[0111] By providing these leg opening elastic members 28, 29, stretchability is imparted along the leg openings 1b of the napkin 1, making the leg openings 1b easier to fit around the legs of the wearer. In particular, in the rear waistline member 20b, the leg openings 1b are likely to rise up from the wearer's body (buttocks) or become displaced due to the influence of the protruding buttocks of the wearer or the movement of the legs by the wearer. Therefore, by providing the rear leg opening elastic member 29 that stretches along the leg openings 1b, the fit of the rear waistline member 20b can be improved around the legs on the buttocks side of the wearer, making it less likely that the wearer will feel uncomfortable or unnatural.

[0112] In order to facilitate such an effect, it is desirable that at least the rear leg elastic member 29 is disposed continuously in the left-right direction in the region from the side joint 40b of the rear waist member 20b to the outer end 10s of the absorbent main body 10. In this embodiment, the rear leg elastic member 29 is provided continuously from the side joint 40b on one side to the side joint 40b on the other side in the left-right direction (see FIG. 2). This can improve the fit in a wide region around the legs on the buttocks side of the wearer.

[0113] In addition, in the napkin 1, the stress in the stretch direction (left-right direction) of the stretched region 20EA is preferably greater than the stress in the stretch direction (up-down direction) of the region where the absorbent elastic member 50 is disposed. Here, the stress of the stretched region 20EA can be measured, for example, using an autograph tensile tester (for example, AG-1KN1) manufactured by Shimadzu Corporation, as follows. First, the front waistband member 20f of the napkin 1 is stretched to such an extent that gathers due to the contraction action of the skin side sheet 22 disappear on its surface, and the dimension in the width direction of the stretched region 20EA is measured, and then the stretched region 20EA is cut to that dimension by a cutter to obtain a sample. Next, one end of the sample is clamped in a fixed chuck and the other end in a movable chuck, and the sample is stretched to about 90% of the initial dimension at a speed of 300 mm / min, and then turned over, and each sample is shrunk to about 75% of the initial dimension. The tensile load (N) is calculated and converted into stress per unit length (mm) (N / mm) to obtain the stress. The stress in the region where the absorbent body elastic member 50 is arranged can also be measured in the same manner by cutting out a predetermined portion of the absorbent main body 10 as a sample.

[0114] The stretchable region 20EA and the absorber elastic member 50 may be compared using a "tensile coefficient." That is, the tensile coefficient in the stretch direction (left-right direction) of the stretchable region 20EA may be made larger than the tensile coefficient in the stretch direction (up-down direction) of the region in which the absorber elastic member 50 is disposed. The tensile coefficient is a coefficient that specifies how easily each part is stretched. For example, the tensile coefficient can be calculated by the following method.

[0115] First, the measurement target portion (including the stretchable region 20EA and the absorbent body elastic member 50) is cut out as a sample from the product to be measured (napkin 1) in the same manner as described above. Next, the cut out sample is left in a natural state at 20°C and 60 RH atmosphere for 60 minutes without applying a tensile load. Then, a line L is drawn along the stretch direction of the sample at the center position in the width direction perpendicular to the stretch direction, and the length of the line L in the natural state is measured. At this time, the line L is drawn on a horizontal table with as little load as possible applied to the sample, and the length of the line L is measured. Here, the length of the line L is the initial length "A". In addition, it is preferable to draw the line L as long as possible on the sample in order to reduce measurement errors, but it is necessary to ensure that the line L does not overlap with the portion to be clamped by the chuck of the tensile tester. Next, both ends of the sample in the stretching direction are held in a tensile tester such as an autograph manufactured by Shimadzu Corporation, the sample is stretched until a load of 0.8 N is applied, and the length of line L when stretched is measured and the length of line L in this state is designated as "A'". For example, in the tensile tester, the sample is pulled in the stretching direction at a pulling speed of 100 mm / min (pulled vertically upward from the horizontal plane). From these measured values, the tensile modulus can be calculated by the following formula.

[0116] Tensile modulus = (A'-A) / A

[0117] In the napkin 1, if the stress (or tensile coefficient) of the stretched region 20EA is greater than the stress (tensile coefficient) of the absorber elastic member 50, the force acting to contract the waist member 20 (ventral waist member 20f) in the left-right direction by the stretched region 20EA is likely to be stronger than the force acting to pull the upper end of the absorbent main body 10 downward by the absorber elastic member 50. Therefore, the waist member 20 is less likely to shift in position against the force of the absorber elastic member 50 pulling the upper end of the absorbent main body 10 downward in the up-down direction. This makes it easier to maintain the fit of the waist member 20 around the waist of the wearer.

[0118] ===Second embodiment=== In the second embodiment, a pants-type napkin 2 (hereinafter, simply referred to as "napkin 2") will be described, which has low-elasticity regions 20NA that are less elastic than the elastic regions 20EA in the waistline member 20. Fig. 7 is a plan view of the napkin 2 in an unfolded and stretched state, as viewed from the skin side in the thickness direction.

[0119] The basic configuration of the napkin 2 is almost the same as that of the napkin 1 of the first embodiment. That is, the napkin 2 has a liquid-absorbent absorbent main body 10 and a waistline member 20 provided on the non-skin side of the absorbent main body 10. Meanwhile, the napkin 2 has, at least in the front waistline member 20f, a low-stretch region 20NA, which has lower stretchability than the stretch region 20EA, adjacent to the left-right outer side of the stretch region 20EA formed by the stretchable skin-side sheet 22. In other words, the low-stretch region 20NA is disposed outside the stretch region 20EA in the left-right direction and at a position overlapping with the stretch region 20EA in the up-down direction (see the hatched portion in FIG. 7).

[0120] In the napkin 2, the low-elasticity region 20NA is formed, for example, by non-elasticating a predetermined region of the skin side sheet 22. Therefore, the front waistline member 20f has left-right elasticity in the elasticity region 20EA, and has no elasticity or very low elasticity in the low-elasticity regions 20NA on both left-right sides thereof.

[0121] In the front waistline member 20f in a natural state or worn state, in the elastic region 20EA, the skin side sheet 22 shrinks in the left-right direction, whereas the non-skin side sheet 21 does not shrink easily, so that multiple fine wrinkles extending in the up-down direction are formed on the non-skin side surface. On the other hand, in the low elastic region 20NA, both the skin side sheet 22 and the non-skin side sheet 21 do not shrink easily, so that wrinkles are not easily formed on the surface. Therefore, in the low elastic region 20NA of the front waistline member 20f, the shape retention of the sheet member is more easily ensured than in the elastic region 20EA. Therefore, for example, when the fastening portion 32 engaged with the front waistline member 20f is peeled off after the napkin 2 is worn, the sheet member (waistline member 20) is more likely to be prevented from bending or twisting in the vicinity of the low elastic region 20NA. This makes it easier to peel off the fastening portion 32 from the front waistline member 20f smoothly. Furthermore, when replacing a used napkin 2 with a new napkin 2 in a toilet while out, the shape retention of the front waist member 20f is more easily ensured in the vicinity of the low-elasticity region 20NA, making it easier to engage the engaging portion 32 in that region.

[0122] As described above, when the low-elasticity region 20NA is formed by subjecting a sheet member such as a nonwoven fabric to a non-elasticity treatment, the fibers (loop members) of the nonwoven fabric are hardened in the region, making it difficult for the hook-and-loop fastener (hook member) of the fastening portion 32 to engage with the surface. Therefore, in the waistband member 20 of the napkin 2, as shown in FIG. 7, the low-elasticity region 20NA is arranged so that the region where the fastening portion 32 is fastened does not overlap with the low-elasticity region 20NA. In other words, the ranges of the stretch region 20EA and the low-elasticity region 20NA are set so that the fastening portion 32 is fastened to a region other than the low-elasticity region 20NA. However, it is possible for the fastening portion 32 to be fastened to the low-elasticity region 20NA, and the fastening portion 32 and the low-elasticity region 20NA (non-elasticity region) may overlap.

[0123] In addition, when the waistline member 20 is provided with the elastic region 20EA and the low elastic region 20NA, it is desirable that the length (width) in the left-right direction of the elastic region 20EA is longer than the length (width) in the left-right direction of the low elastic region 20NA. In the napkin 2, as in the napkin 1, the waistline member 20 has elasticity in the region between the pair of fastening parts 32, 32 in the left-right direction, so that it is possible to improve the fit around the waist of the wearer. In this case, if the width of the low elastic region 20NA is wider than the width of the elastic region 20EA, the region in which the elasticity works in the waistline member 20 becomes smaller, and there is a risk that sufficient fit cannot be obtained. In contrast, in the napkin 2, as shown in FIG. 7, the width of the elastic region 20EA in the left-right direction is wider than the width of the low elastic region 20NA in the left-right direction, and sufficient elasticity is imparted to the waistline member 20 (front waistline member 20f). Therefore, the fit of the napkin 2 can be improved.

[0124] 7, by providing separation portion 25 in low-elasticity region 20NA, it is possible to easily perform the operation of separating separation portion 25. For example, when separation portion 25 is the above-mentioned perforation, since low-elasticity region 20NA is difficult to stretch, it is easy to apply a force to break the perforation to the sheet member constituting waistband member 20, and separation portion 25 can be easily separated.

[0125] ===Other features of Napkin 1 and Napkin 2=== In addition to the above-mentioned characteristics, napkins 1 and 2 have the following characteristics.

[0126] In the front waistline member 20f (front body piece) of the napkins 1 and 2, a stretchable region 20EA is provided over the entire area sandwiched between the pair of left and right locking portions 32, 32 when the locking portions 32, 32 are locked (see FIG. 6, etc.). That is, not only is the stretchable region 20EA provided at the vertical center position 32C of the locking portion 32, but the stretchable region 20EA is also provided that is continuous in the left-right direction over the entire rectangular area between the upper end 32et and the lower end 32eb of the locking portion 32 in the vertical direction and between the pair of locking portions 32, 32 in the left-right direction (between the inner ends of 32, 32 in the left-right direction).

[0127] Therefore, the entire rectangular area sandwiched between the pair of left and right locking parts 32, 32 contracts in the left-right direction, and both left and right ends of the rear waistline member 20b (rear body) are more likely to be pulled inward via the pair of locking parts 32, 32. This causes the waistline opening 1a to contract and fit better around the waist of the wearer, making it less likely to shift position.

[0128] Furthermore, the absorber elastic member 50 provided in the absorbent main body 10 has a longer length at the rear side (back side) in the front-to-rear direction of the napkins 1, 2 than at the front side (ventral side). In Fig. 5, in the vertical direction (longitudinal direction) of the napkin 1 in an unfolded and stretched state, the length L50b of the absorber elastic member 50 at the rear side (back side) of the central position CL is longer than the length L50f of the absorber elastic member 50 at the front side (ventral side) (L50b>L50f).

[0129] When the napkins 1 and 2 are worn, the area behind the center position CL in the front-rear direction is located at the buttocks of the wearer, so if the absorbent body 10 does not fit along the cleft of the buttocks, excretion liquid such as menstrual blood may leak out of the absorbent body 10 along the cleft of the buttocks. In response to this, as shown in FIG. 5, by lengthening the length L50b of the absorbent body elastic member 50 at the rear side in the vertical direction (longitudinal direction), the contraction force of the absorbent body elastic member 50 can be applied over a wide range at the rear side of the absorbent body 10. That is, the contraction force of the absorbent body elastic member 50 presses the absorbent body 10 against the body of the wearer, making it easier to fit firmly to the cleft of the buttocks. This further improves the fit of the napkins 1 and 2, making it difficult for excretion liquid such as menstrual blood to leak.

[0130] Furthermore, in the vertical direction of the rear waistline member 20b (rear body) of the napkins 1, 2, the rear end 50eb (upper end on the back side) of the absorber elastic member 50 is located above the lower end 30eb of the tab 30 (see FIG. 5). That is, in the vertical direction of the rear waistline member 20b (rear body), the area where the pair of tabs 30 are arranged and the area where the stretchability of the absorber elastic member 50 acts overlap at least partially. With this configuration, when the tabs 30 of the rear waistline member 20b are pulled outward in both left and right directions during the putting on of the napkins 1, 2, the force pulling the tabs 30 also acts on the absorber elastic member 50 in conjunction with the tabs. Therefore, when the wearer grabs the tabs 30 and pulls them in the left and right directions to engage them with the front waistline member 20f, the rear upper end (including the rear end 50eb) of the absorber elastic member 50 is pulled in the left and right directions. This makes it difficult for the rear region of the absorbent body 10 to slip down, and also makes it easier for the contractile force of the absorbent body elastic member 50 to fit better into the buttocks of the wearer.

[0131] Also, as shown in FIG. 5, the length W28 in the left - right direction of the front - side leg - around elastic member 28 arranged along the lower edge portion (the contour of the leg - around opening 1b) of the front - side body - around member 20f is shorter than the length W29 in the left - right direction of the rear - side leg - around elastic member 29 arranged along the lower edge portion (the contour of the leg - around opening 1b) of the rear - side body - around member 20b (W28 < W29). In other words, in the napkins 1 and 2, the range in which the left - right contraction force by the front - side leg - around elastic member 28 acts in the front - side body - around member 20f is narrower than the range in which the left - right contraction force by the rear - side leg - around elastic member 29 acts in the rear - side body - around member 20b. In the case of FIG. 5, in the rear - side body - around member 20b, the contraction force of the rear - side leg - around elastic member 29 acts over the entire left - right direction, while in the front - side body - around member 20f, regions where the contraction force by the front - side leg - around elastic member 28 does not act are provided at both ends in the left - right direction.

[0132] Since both ends of the front - side body - around member 20f in the left - right direction are difficult to contract, when wearing the napkins 1 and 2, it becomes easier to perform the operation of grasping the left - right ends of the front - side body - around member 20f and locking the tabs 30 provided at the left - right ends of the rear - side body - around member 20b. That is, since a gripping margin is formed at the left - right ends of the front - side body - around member 20f, the wearing operation of the napkins 1 and 2 becomes easier and it can be easily fitted to the body.

[0133] 2 and 6, in a state where the locking portion 32 of the tab 30 is locked to the front waistline member 20f, the front leg elastic member 28 is disposed below the locking portion 32. That is, the position of the upper end of the front leg elastic member 28 is located vertically lower than the position of the lower end 32eb of the locking portion 32. Therefore, in the front waistline member 20f, the contractile force of the front leg elastic member 28 is less likely to act on the area where the locking portion 32 is locked, and the tab 30 can be more easily locked to the front waistline member 20f when putting on the napkins 1 and 2. In addition, in a state where the tab 30 is locked to the front waistline member 20f, the stretchability of the front leg elastic member 28 is less likely to be interfered with by the locking portion 32, so that the leg openings 1b of the front waistline member 20f can more easily fit to the groin of the wearer. This allows the fitting of the napkins 1 and 2 to be improved.

[0134] Furthermore, functional materials such as cooling agents, warming agents, fragrances, etc. may be provided in the absorbent body 10 and waistband member 20 of the napkins 1 and 2. For example, by providing a cooling agent in a predetermined region of the skin side or non-skin side of the skin side sheet 12 constituting the absorbent body 10, a cooling effect can be imparted to the wearer when wearing the napkins 1 and 2.

[0135] When a cooling agent is used as a functional material, it is possible to use one generally known in the art as a cooling agent, but it is preferable to use one that is volatile and acts on the receptor activation channel (TRPM8) in the nerves of the skin. For example, menthol (e.g., l-menthol) and its derivatives (e.g., menthyl lactate), methyl salicylate, camphor, cucumber extract, and essential oils derived from plants (e.g., mint, eucalyptus, and nutmeg) can be mentioned.

[0136] Similarly, when a warming agent is used as the functional material, those generally known in the art as a warming agent can be used. For example, capsicoside, capsaicin (LD50: 47 mg / kg, molecular weight: 305), capsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, nonivamide, etc.), capsanthin, benzyl nicotinate (LD50: 2,188 mg / kg, molecular weight: 213), β-butoxyethyl nicotinate, N-acyl vanillamide, vanillylamide nonanoate, polyhydric alcohol, red pepper powder, red pepper tincture, red pepper extract, vanillyl ether nonanoate, vanillyl alcohol alkyl ether derivatives (e.g., vanillyl ethyl ether, vanillyl butyl ether (LD50), 0:4,900mg / kg,molecular weight:210), vanillyl pentyl ether, vanillyl hexyl ether, isovanillyl alcohol alkyl ether, ethyl vanillyl alcohol alkyl ether, veratorial alcohol derivatives, substituted benzyl alcohol derivatives, substituted benzyl alcohol alkyl ether, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, gingerol (LD50:250mg / kg,molecular weight:294), zingerone, hesperidin, and pyrrolidone carboxylic acid, and any combination thereof.

[0137] Similarly, when a fragrance is used as a functional material, it is possible to use fragrances that are generally known in the art. For example, a green herbal fragrance (green herbal-like fragrance) can be used. A green herbal-like fragrance is a fragrance tone that includes a green-like fragrance (green note) or a herbal-like fragrance (herbal note). A green-like fragrance refers to a refreshing fragrance tone of grass or young leaves. A herbal-like fragrance (herbal note) refers to a fragrance tone that uses herbs and is characterized by a natural, medicinal fragrance. The fragrance composition containing a fragrance having a green herbal-like fragrance is cis-3-hexenol, cis-3-hexenyl formate, cis-3-hexenyl acetate, cis-3-hexenyl propionate, cis-3-hexenyl butyrate, trans-2-hexenal, trans-2-hexenyl acetate, hexyl acetate, styrallyl acetate, 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal (IFF brand, Helional), 3(4)-(5-ethylbis(2-methyl-1,2-propanol), 2-methyl-3-(3,4-methyl-1,2-propanol), 2-methyl-3-(3,4-methyl-1,2-propanol, ...), 2-methyl-3 It is preferable that the fragrance contains one or more fragrances selected from chloro[2,2,1]heptyl-2)-cyclohexanol, allyl 2-pentyloxyglycolate (Allyl Amyl Glycolate, IFF), 4-methyl-3-decen-5-ol (Undecabertol, Givaudan), hexylaldehyde, 2,4-dimethyl-3-cyclohexenylcarboxaldehyde (Tripral, IFF), and phenylacetaldehyde.

[0138] These functional materials may be disposed in a state of being encapsulated in water-disintegrable microcapsules as core materials. The water-disintegrable microcapsules refer to capsules having a diameter of 1 to 1,000 μm and having a space encapsulating a core material (cooling sensation component). The capsules are not particularly limited in appearance as long as they can encapsulate a core material and control the release of the core material, and examples of such appearance shapes include spherical and amorphous shapes. The capsules may be of a mononuclear type having one space for holding a core material, a polynuclear type having multiple spaces for holding a core material, or a matrix type having a structure in which a fine particle-like core material is dispersed inside a particle, or a structure in which a liquid core material is impregnated. Examples of the shape of the space include spherical and amorphous shapes.

[0139] In microcapsules, the membrane material (wall material) that encapsulates (or contains) the core material changes in response to a chemical stimulus, releasing the encapsulated (or contained) component. An example of a chemical stimulus is contact between the wall material of the microcapsule and a liquid (aqueous solution) such as a body fluid. By applying such chemical stimuli to the wall material of the microcapsule, the wall material can be caused to collapse. As a result, the release of the core material (functional material) in the microcapsule can be initiated, or, if the core material was being released gradually before the stimulus, the degree of release can be accelerated.

[0140] The microcapsules are commercially available, for example, INCAP (trademark) available from Symrise. The microcapsules can be produced by dissolving the microcapsule material in water to form an aqueous solution, mixing the aqueous solution with a cooling sensation component and a surfactant, and drying the aqueous solution under reduced pressure while spraying it. Although water-disintegrating microcapsules have been exemplified as the microcapsules, microcapsules in which a functional material is encapsulated in cyclodextrin may also be used.

[0141] ===Other=== The above-mentioned embodiment is for the purpose of facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

[0142] In the above embodiment, elastic sheets such as elastic nonwoven fabrics are used as the skin side sheets 22, 23 constituting the waistline member 20 to impart elasticity in the left-right direction to the waistline member 20, but other elastic members may be provided in the waistline member 20. For example, as shown in Fig. 2, waistline elastic members 27 such as rubber threads may be provided at the upper ends of the front waistline member 20f and the rear waistline member 20b so as to be elastic in the left-right direction. By providing such waistline elastic members 27, the fit at the waistline opening 1a is improved, and the positional shift of the waistline member 20 can be suppressed when the napkin 1 is worn.

[0143] Furthermore, when the waistline elastic members 27 are provided in the waistline member 20, it is preferable to arrange the waistline elastic members 27 so that at least a portion of each overlaps with the skin side sheets 22, 23. In this way, the lateral stretchability exhibited by the waistline elastic members 27 and the lateral stretchability exhibited by the skin side sheets 22, 23 work together to further improve the fit of the napkin 1 around the wearer's waist.

[0144] In the above embodiment, in the napkins 1, 2 in a tape-shaped state after the waistline member 20 is separated by the separating portion 25, the tab 30 is joined to the rear waistline member 20b (rear body) and the locking portion 32 is locked to the front waistline member 20f (front body), but the arrangement of the tab 30 is not limited to this. For example, after the waistline member 20 is separated, the tab 30 may be provided on the front waistline member 20f (front body) and the locking portion 32 may be locked to the rear waistline member 20b (rear body). As described in FIG. 2 and the like, the rear waistline member 20b is provided with the skin-side sheet 23 having elasticity, and therefore the rear waistline member 20b also has an elastic region similar to the elastic region 20EA of the front waistline member 20f. Therefore, even when a pair of fastening portions 32, 32 are fastened to the rear waist member 20b, the area between the fastening portions 32, 32 has elasticity, thereby improving the fit around the wearer's waist.

[0145] In the above embodiment, an example in which a pair of fastening parts 32 is provided on both the left and right sides has been described, but multiple pairs of fastening parts 32 may be provided. For example, two fastening parts 32 may be arranged spaced apart in the vertical direction to form a pants-type absorbent article having two pairs of fastening parts 32. In this case, if a stretchable region is provided at the vertical center position of any one pair of fastening parts among the multiple pairs of fastening parts, the waist opening can be easily contracted between the fastening parts, thereby achieving the above-mentioned good fit. [Explanation of symbols]

[0146] 1 Napkin (pants-type absorbent article) (first embodiment), 1a waist opening, 1b leg opening, 2 Napkin (pants-type absorbent article) (second embodiment), 10 Absorbent body, 11 absorbent core, 12 Top sheet, 13 back sheet, 13a liquid impermeable sheet, 13b hydrophobic sheet, 20 waist member, 20f front waist member, 20b rear waist member; 20EA stretch area, 20NA low stretch area, 21 non-skin side sheet, 22 skin side sheet, 23 skin side sheet, 25 separation part, 25fe separation end, 25be separation end, 27 waist elastic member, 28 front leg elastic member, 29 rear leg elastic member, 30 tabs, 31 base sheet, 32 locking portion, 35 tab joint portion, 40 side joint, 40f end, 40b end, 50 absorbent elastic member, CL center position

Claims

1. The vertical direction, the horizontal direction, and the front-rear direction intersect with each other, A pants-type absorbent article having an absorbent main body and a waistband member arranged to overlap the non-skin side of the absorbent main body, A pair of separation sections for separating the waistband member into a front body section and a rear body section, At least one pair of fastening parts is provided on both sides in the left-right direction of one of the front body and the rear body, the fastening parts being releasably fastened to a predetermined area of ​​the other of the front body and the rear body; A pants-type absorbent article, characterized in that the other of the front body and the rear body has a stretchable region that is stretchable along the left-right direction at a central position of the fastening portion in the up-down direction.

2. The pants-type absorbent article according to claim 1, A pants-type absorbent article, characterized in that the absorbent main body has absorbent body elastic members that stretch along the longitudinal direction of the absorbent main body.

3. The pants-type absorbent article according to claim 2, The absorber elastic members are provided in a plurality at predetermined intervals in the left-right direction, The width of the stretchable area in the left-right direction is A pants-type absorbent article, characterized in that the distance in the left-right direction is larger than the distance between the absorber elastic member located on the furthest side in the left-right direction and the absorber elastic member located on the furthest side in the left-right direction.

4. The pants-type absorbent article according to claim 2 or 3, The absorbent body has an absorbent core containing a superabsorbent polymer, The width of the stretchable area in the left-right direction is A pants-type absorbent article, characterized in that the width of the absorbent core in the left-right direction is larger than the width of the absorbent core.

5. The pants-type absorbent article according to any one of claims 2 to 4, The width of the stretchable area in the left-right direction is A pants-type absorbent article, characterized in that the width of the absorbent body in the left-right direction is larger than the width of the absorbent body.

6. A pants-type absorbent article according to any one of claims 2 to 5, A pants-type absorbent article, characterized in that, in the vertical direction, a front upper end of the absorber elastic member is located lower than a lower end of the stretchable region.

7. A pants-type absorbent article according to any one of claims 2 to 6, A pants-type absorbent article, characterized in that, in the vertical direction, a front upper end of the absorber elastic member is located lower than a lower end of the separation portion.

8. The pants-type absorbent article according to any one of claims 2 to 7, A pair of side joints are provided at both ends in the left-right direction to join the front body and the back body to each other, A pants-type absorbent article characterized in that, when the locking portion is locked to the waistband member, the locking portion is located outside the absorber elastic member in the left-right direction and inside the side joint portion in the left-right direction.

9. A pants-type absorbent article according to any one of claims 1 to 8, A pants-type absorbent article, characterized in that the elastic region has a portion in the up-down direction that overlaps with both ends of the absorbent main body in the left-right direction.

10. A pants-type absorbent article according to any one of claims 1 to 9, A pants-type absorbent article characterized in that, when viewed in the thickness direction in an unfolded and stretched state, the left-right contraction force of the stretch region in a portion where the stretch region overlaps with the absorbent main body is smaller than the left-right contraction force of the stretch region in a portion where the stretch region does not overlap with the absorbent main body.

11. A pants-type absorbent article according to any one of claims 1 to 10, A low-elasticity region having a lower elasticity than the elasticity region, A pants-type absorbent article, characterized in that the low-elasticity region is disposed outside the elasticity region in the left-right direction.

12. The pants-type absorbent article according to claim 11, A pants-type absorbent article, characterized in that at least a portion of the low-elasticity region is positioned outside the elasticity region in the left-right direction and overlaps with the elasticity region in the up-down direction.

13. The pants-type absorbent article according to claim 11 or 12, A pants-type absorbent article, characterized in that a width of the elastic region in the left-right direction is greater than a width of the low-elastic region in the left-right direction.

14. A pants-type absorbent article according to any one of claims 1 to 13, A pants-type absorbent article, characterized in that the entirety of the fastening portion overlaps with the stretchable region in the vertical direction.

15. A pants-type absorbent article according to any one of claims 1 to 14, The absorbent body has an absorbent core containing a superabsorbent polymer, A pants-type absorbent article, characterized in that a lower end of the engagement portion is located higher than an upper end of the absorbent core in the vertical direction.

16. A pants-type absorbent article according to any one of claims 1 to 15, A tab provided with the locking portion, a tab joint portion for joining the tab to the waistband member, the tab joint portion being located outside the locking portion in the left-right direction; A pants-type absorbent article, characterized in that the fastening portion is provided with a hook member or a loop member of a hook-and-loop fastener.

17. 17. The pant-type absorbent article according to claim 16, A pair of side joints are provided at both ends in the left-right direction to join the front body and the back body to each other, In the left-right direction, The tab joint is provided at any position from the outer end of the absorbent body to the side joint, A pants-type absorbent article, characterized in that the separation portion is disposed between the tab joining portion and the fastening portion.

18. A pants-type absorbent article according to any one of claims 1 to 17, A pants-type absorbent article characterized in that the rear body has leg elastic members stretchable in the left-right direction along a lower edge of the rear body.

19. A pants-type absorbent article according to any one of claims 1 to 18, The absorbent body has an absorbent body elastic member that stretches along the longitudinal direction of the absorbent body, A pants-type absorbent article, characterized in that a stress in the left-right direction of the stretchable region is greater than a stress in the up-down direction of a region in which the absorber elastic members are arranged.

20. A pants-type absorbent article according to any one of claims 1 to 19, A pants-type absorbent article characterized in that the other of the front body and the rear body has the stretchable region over the entire area between the upper and lower ends of the fastening portions in the vertical direction and between the inner ends of the pair of fastening portions in the left-right direction.

21. A pants-type absorbent article according to any one of claims 1 to 20, The absorbent body has an absorbent body elastic member that stretches along the longitudinal direction of the absorbent body, A pants-type absorbent article, characterized in that, in the longitudinal direction, the length of the absorber elastic member on the rear side of the central position is longer than the length of the absorber elastic member on the front side of the central position.

22. 22. The pant-type absorbent article according to claim 21, The rear body has a tab provided with the fastening portion, A pants-type absorbent article, characterized in that, in the vertical direction, an upper end of a rear side of the absorber elastic member is located higher than a lower end of the tab.

23. A pants-type absorbent article according to any one of claims 1 to 22, The garment has a front leg elastic member along a lower edge portion of the front body in the vertical direction, and a rear leg elastic member along a lower edge portion of the rear body in the vertical direction, A pants-type absorbent article, characterized in that the length of the front leg-hole elastic members in the left-right direction is shorter than the length of the rear leg-hole elastic members in the left-right direction.

24. 24. The pant-type absorbent article according to claim 23, A pants-type absorbent article, characterized in that an upper end of each of the front leg elastic members is located lower than a lower end of each of the fastening portions in the vertical direction.

25. A pants-type absorbent article according to any one of claims 1 to 24, In a predetermined region of at least one of the absorbent body and the waistband member, A pants-type absorbent article comprising a functional material containing at least one of a cooling agent, a warming agent, and a fragrance.

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