Pants-type absorbent article

Abstract

To provide an underpants-type absorbent article suppressing an occurrence of leakage from a longitudinal end of an absorber, while inducing deformation of the absorber.SOLUTION: An underpants-type absorbent article comprising a ventral waist part, a dorsal waist part and an absorber body including an absorber, comprises a first joint part at which a non-skin side face at a longitudinal one end of the absorber body and the ventral waist part are joined by an adhesive, and a second joint part at which a non-skin side face at the longitudinal other end of the absorber body and the dorsal waist part are joined by the adhesive. The absorber includes a low basis weight part whose basis weight is lower than that of the periphery, formed along the longitudinal direction at least at a central part in the longitudinal direction, and a high rigidity part having higher rigidity than the rigidity in the central position, formed in the longitudinal direction at least at one of a part from the inner end of the first joint part to an outer end of the low basis weight part and a part from the inner end of the second joint part to the outer end of the low basis weight part.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Disposable diapers are known as absorbent articles. Patent Document 1 discloses a disposable diaper that has an absorbent layer (absorbent body) between a liquid-permeable top sheet and a liquid-impermeable back sheet, with a front body and a rear body provided on the front and rear sides of the absorbent layer in the longitudinal direction. At least one longitudinal groove is formed in the widthwise center of the surface of the absorbent layer of this diaper, and excreted liquid that has permeated the thickness direction at the widthwise center is instantly guided along the groove in the longitudinal front and rear directions, and can be absorbed by the front and rear parts of the absorbent layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4092319 Summary of the Invention [Problem to be solved by the invention]

[0004] The grooves in the absorbent layer disclosed in Patent Document 1 serve as folding points that deform the absorbent body while diffusing excreted liquid over a wide area. If the grooves are formed up to the waist side of the user, the absorbent body will bend starting from the grooves when the user closes their legs while wearing the garment, and the deformation caused by the bending may reach the longitudinal ends of the absorbent layer (absorbent body), causing leakage from the ends of the absorbent body.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a pants-type absorbent article that induces deformation of the absorbent body while suppressing leakage from the longitudinal ends of the absorbent body. [Means for solving the problem]

[0006] The main invention to achieve the above object is: In the deployed state, the sheet has a longitudinal direction, a width direction, and a thickness direction which intersect with each other, The garment has a ventral waist portion, a rear waist portion, and an absorbent body having an absorbent body, A pants-type absorbent article in which the absorbent main body is folded in half at a central position in the longitudinal direction, and both side portions in the width direction of the ventral waist portion and the rear waist portion are joined at a pair of waist joints, a first joining portion at which a non-skin side surface of one end portion of the absorbent body in the longitudinal direction and the abdominal side waist portion are joined by an adhesive; a second joining portion at which a non-skin side of the end portion on the other side in the longitudinal direction of the absorbent main body and the back-side waist portion are joined by an adhesive; having The absorbent body has a low basis weight portion at least in a central portion in the longitudinal direction, the low basis weight portion having a basis weight lower than that of a periphery along the longitudinal direction, The low basis weight portion is provided in a pair, and is composed of a one-side low basis weight portion provided on one side in the width direction and an other-side low basis weight portion provided on the other side, In the longitudinal direction, The absorbent body is At least one of the areas between the inner end of the first joint portion and the outer end of the low basis weight portion and the areas between the inner end of the second joint portion and the outer end of the low basis weight portion at the central position than the stiffest part It has a highly rigid part, In the longitudinal direction, the high stiffness portion extends from a position overlapping with the low basis weight portion to a position overlapping with the waist seam. The present invention is a pants-type absorbent article characterized by the above. 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 provide a pants-type absorbent article that suppresses leakage from the ends of the absorbent body in the longitudinal direction while inducing deformation of the absorbent body. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (diaper 1). [Diagram 2] FIG. 1 is a schematic plan view of a diaper 1 in an open and stretched state. [Diagram 3] FIG. 2 is a plan view illustrating the configuration of the absorbent body 10 and the leakage preventing wall portion 50. [Figure 4] FIG. 4 is a schematic cross-sectional view taken along line AA in FIG. [Diagram 5] 2 is a schematic plan view of the ventral side and the rear side of the diaper 1, showing an imaginary line H. FIG. [Figure 6] FIG. 2 is a plan view showing only the absorbent body 11 on the ventral side when the diaper 1 is folded in half at a central position FL in the longitudinal 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. A pants-type absorbent article having a longitudinal direction, a width direction, and a thickness direction that intersect with one another in an unfolded state, a ventral waist section, a rear waist section, and an absorbent body, the absorbent body being folded in half at a center position in the longitudinal direction, and both side portions in the width direction of the ventral waist section and the rear waist section being joined at a pair of waist joints, the absorbent body being folded in half at a center position in the longitudinal direction, and ... absorbent body being folded in half at a center position in the longitudinal direction, and the absorbent body being folded in half at a pair of waist joints, the absorbent body being folded in half at a center position in the longitudinal direction, and the absorbent body being folded in half at a pair of waist joints, The pants-type absorbent article has a second joint portion at which the non-skin side of the other end portion in the longitudinal direction and the back waist portion are joined with an adhesive, and the absorbent body has a low basis weight portion along the longitudinal direction having a lower basis weight than the surrounding areas at least in the central portion in the longitudinal direction, and has a high rigidity portion in the longitudinal direction at least in one of the portions between the inner end of the first joint portion and the outer end of the low basis weight portion and between the inner end of the second joint portion and the outer end of the low basis weight portion, the high rigidity portion being higher than the rigidity at the central position.

[0010] In such pants-type absorbent article, by arranging the low basis weight part in the longitudinal center part corresponding to the crotch part of the wearer, it is possible to induce the deformation of the absorbent body starting from the low basis weight part so as to fit the crotch part. Furthermore, during urination, excreted liquid is diffused throughout the absorbent body along the low basis weight part, and by having the high stiffness part on the outer side of the longitudinal outer end of the low basis weight part, the deformation of the absorbent body is suppressed by the high stiffness part, and the occurrence of leakage can be suppressed by preventing deformation up to the longitudinal end of the absorbent main body.

[0011] In such a pants-type absorbent article, it is desirable that the high rigidity portion has a compressed portion, and when an imaginary line is drawn connecting the positions of the inner ends of the longitudinal direction at both ends of the width direction of the first joint or the second joint to the center point of the width direction of the central position, the low basis weight portion is at the same position in the longitudinal direction as the imaginary line or extends outward in the longitudinal direction than the imaginary line, and the portion that overlaps with the longitudinal end of the low basis weight portion when viewed in the thickness direction has a compressed portion.

[0012] In such pants-type absorbent articles, the imaginary line is a line that can be formed by the weight of the absorbent body that has absorbed urine after urination, and after urination, a fold line is likely to occur in the absorbent body along the imaginary line. If the low basis weight portion is located below (inside in the longitudinal direction) the imaginary line, there is a risk that the diffusion of excreted liquid by the low basis weight portion will be interrupted by the crease of the imaginary line. On the other hand, if the low basis weight portion is at the same position as the imaginary line or extends to the outside (above) of the imaginary line in the longitudinal direction, the liquid diffusion is less likely to be interrupted. In addition, by having a compressed portion in the portion overlapping the end of the low basis weight portion, the lifting property of the liquid is improved at the end of the low basis weight portion, and the excreted liquid that has flowed down the low basis weight portion can be further diffused by the compressed portion.

[0013] In such a pants-type absorbent article, it is desirable that the high stiffness portion has a compressed portion and has a non-compressed area in which no compressed portion is provided, within a predetermined range in the longitudinal direction including the central position.

[0014] In such pants-type absorbent articles, the non-compressed regions are the portions that come into contact with the crotch of the wearer, and by not providing a compression portion in the crotch portion, it is possible to improve the function of instantly absorbing excreted urine and swiftly dispersing it in the longitudinal direction by the low basis weight portion. Also, by providing the non-compressed regions in the crotch portion, there are no high rigidity portions, so the article fits easily to the crotch area, for example, when the wearer closes their legs.

[0015] In such a pants-type absorbent article, it is desirable that at least a part of the absorbent body, which overlaps with the first joint portion or the second joint portion when viewed in the thickness direction, has a high rigidity portion.

[0016] In such a pants-type absorbent article, the portion of the absorbent body that overlaps with the first or second bonding portion in the thickness direction also overlaps with the adhesive of each bonding portion, and such portion has a high rigidity portion, which makes the portion more rigid than the portion that does not overlap with the first or second bonding portion. In other words, deformation originating from the low basis weight portion can be suppressed by the high rigidity portion on the inside in the longitudinal direction of each bonding portion, while deformation can be suppressed more reliably by the portion where the first or second bonding portion and the high rigidity portion overlap in the thickness direction. Therefore, deformation can be suppressed neatly without causing unnatural folds or wrinkles due to abrupt suppression.

[0017] In such a pants-type absorbent article, it is desirable that the adhesive at the first joint and the second joint is provided intermittently in the width direction along the longitudinal direction, and at least a portion of the absorbent body that overlaps with the first joint or the second joint when viewed in the thickness direction has a high rigidity portion.

[0018] In such pants-type absorbent article, the adhesive is provided intermittently, thereby preventing each joint from becoming too hard. In the absorbent body, the portion where the adhesive and the high stiffness portion overlap in the thickness direction becomes even more rigid, which makes it easier to more reliably prevent deformation of the low basis weight portion. In addition, the adhesive is provided intermittently in the width direction, which prevents each joint as a whole from becoming excessively hard even if it overlaps with the high stiffness portion, making it less likely to cause discomfort to the wearer.

[0019] In such a pants-type absorbent article, the high stiffness portion has a compressed portion, and in the longitudinal direction, an overlapping region having a compressed portion overlapping with the low basis weight portion, and a non-overlapping region having a compressed portion outside the overlapping region are provided, and it is desirable that the length of the overlapping region is less than or equal to the length of the non-overlapping region.

[0020] In such a pants-type absorbent article, the overlapping region is a region that transfers excreted liquid that has migrated along the low basis weight portion to the non-overlapping region, and the non-overlapping region is a region that enhances the lifting effect of the excreted liquid by the compression portion, allowing the excreted liquid to be spread over a wider area. If the overlapping region does not exist, there is a risk that the excreted liquid will not be transferred to the non-overlapping region properly, so it is necessary to provide the overlapping region as small as possible. Therefore, by providing an overlapping region whose length in the longitudinal direction is equal to or less than the length of the non-overlapping region, the liquid migration through the low basis weight portion and the liquid diffusion in the non-overlapping region can be easily performed with a smaller overlapping region, compared to the case where an overlapping region whose length in the longitudinal direction is longer than the non-overlapping region is provided.

[0021] In such a pants-type absorbent article, the high stiffness portion has a compressed portion, and when the absorbent main body is folded in half at the central position, it has a vertical direction with the side on which the ventral waist portion and the dorsal waist portion are located being the upper side and the central position being the lower side, and an overlapping region having a compressed portion is provided in the vertical direction so as to overlap with the low basis weight portion, and if the region of the low basis weight portion from the lower end of the overlapping region to the central position is defined as a central region of the low basis weight portion, it is desirable that the length of the central region of the low basis weight portion is longer than the length of the overlapping region.

[0022] In such a pants-type absorbent article, the central region of the low basis weight portion is close to the urination opening, and if the overlapping region is longer than the central region of the low basis weight portion, the instantaneous absorption performance near the urination opening may decrease, which may cause leakage. Therefore, by making the central region of the low basis weight portion longer than the overlapping region, the excreted urine is quickly transferred in the longitudinal direction in the low basis weight portion, while the excreted liquid is transferred in the overlapping region, which makes it easier to spread the excreted liquid over a wide area.

[0023] In such a pants-type absorbent article, the high stiffness portion has a compressed portion, and when the absorbent main body is folded in half at the central position, it has a vertical direction with the side on which the ventral waist portion and the dorsal waist portion are located being the upper side and the central position being the lower side, and in the vertical direction, there is provided an overlapping region having a compressed portion so as to overlap with the low basis weight portion, and a non-overlapping region having a compressed portion above the overlapping region, and when the region of the low basis weight portion from the lower end of the overlapping region to the central position is defined as the central region of the low basis weight portion, it is desirable that the length of the non-overlapping region is longer than the length of the central region of the low basis weight portion.

[0024] In such pants-type absorbent articles, if the central region of the low basis weight portion is extended too far toward the ventral side, there is a risk of leakage due to an insufficient area available for absorption after the transfer and diffusion of excrement, and if it is extended too far toward the dorsal side, deformation of the absorbent body is promoted, and there is a risk of leakage due to an insufficient space for accommodating feces. Therefore, by providing a longer non-overlapping region while providing a central region of the low basis weight portion within an appropriate range, it is possible to promote widespread liquid diffusion after rapid liquid diffusion in the low basis weight portion by the liquid-pulling effect of the non-overlapping region provided over a wider range.

[0025] In such a pants-type absorbent article, it is desirable that the high stiffness portion has a linearly formed high density portion having a higher density than the surrounding area, or a portion having multiple dot-like high density portions having a higher density than the surrounding area.

[0026] According to such pants-type absorbent article, in the portion where the high density portion is formed in a line shape, the excreted liquid can be diffused more along the line-shaped high density portion. In addition, it is possible to adjust the stiffness to any desired level by changing the linear pattern. In the portion where a plurality of dot-shaped high density portions are formed, each point of the high density portion becomes a liquid drawing starting point, and the drawn liquid spreads around each point, thereby diffusing the excreted liquid.

[0027] In such a pants-type absorbent article, when the absorbent main body is folded in half at the central position, the side on which the ventral waist portion and the rear waist portion are located has a vertical direction with the upper side and the central position on the lower side, and the side on which the ventral waist portion is located is the front side and the side on which the rear waist portion is located is the rear side, it is desirable that in the vertical direction, the length of the low basis weight portion on the front side is longer than the length of the low basis weight portion on the rear side.

[0028] In such a pants-type absorbent article, the diffusion of excreted liquid can be improved by extending the length of the low basis weight section on the ventral side close to the urination opening. On the other hand, if the low basis weight section is provided too long on the dorsal side, it may promote deformation of the absorbent body due to the low basis weight section, which may result in an insufficient space for storing feces. Therefore, it is preferable to provide the low basis weight section within a range that is not too long.

[0029] In such a pants-type absorbent article, the high stiffness portion has a compressed portion, and is provided with an overlapping region having a compressed portion overlapping with the low basis weight portion in the longitudinal direction, and a non-overlapping region having a compressed portion outside the overlapping region in the longitudinal direction, and it is desirable that the non-overlapping region extends to the longitudinal end or the widthwise end of the absorbent body.

[0030] With such a pants-type absorbent article, the excreted liquid diffused in the longitudinal direction by the low basis weight portion can be diffused over a wide area up to the longitudinal ends or width ends of the absorbent body, thereby achieving more efficient absorption.

[0031] Such a pants-type absorbent article has a pair of leakage prevention wall portions provided on both sides of the absorbent main body in the width direction, each of the pair of leakage prevention wall portions having a base end portion that cannot stand in the thickness direction and an upright portion that can stand on the skin side in the thickness direction by an elastic member that can stretch in the longitudinal direction, with the base end portion as a fulcrum, and the high rigidity portion has a compressed portion, and it is desirable that a compressed portion is provided in the entire area in the width direction from the inner end of one of the base ends to the inner end of the other base end.

[0032] In such a pants-type absorbent article, it is preferable that the widthwise inner side of the leakage prevention wall portion does not deform in order to block excreted urine, and by providing a compression portion between the base ends of the leakage prevention wall portion, deformation is suppressed, thereby further improving the leakage prevention function.

[0033] In such a pants-type absorbent article, it is preferable that a compressed portion is provided so as to straddle at least a part of the imaginary line in a plan view.

[0034] With such pants-type absorbent articles, the absorbent body is prone to folding along the imaginary line after urination, but by providing a compression portion across the imaginary line, folding of the absorbent article can be suppressed and the disruption of the diffusion of excretory liquid due to folding can be suppressed.

[0035] In such a pants-type absorbent article, it is desirable that the absorbent body has an absorbent core and a liquid-permeable core wrap sheet covering the absorbent core from the skin side and non-skin side in the thickness direction, and in the low basis weight portion, the core wrap sheet located on the skin side and the core wrap sheet located on the non-skin side are joined together.

[0036] In such pants-type absorbent articles, if the skin-side and non-skin-side core wrap sheets are not joined together in the low basis weight portion, there is a risk that the low basis weight portion will disappear due to swelling of the absorbent body when absorbing urine, movement of internal components of the absorbent body, etc. By joining the skin-side and non-skin-side core wrap sheets together, the disappearance of the low basis weight portion can be prevented, and the liquid migration and diffusion effects of the low basis weight portion can be continuously achieved.

[0037] === Implementation form === Hereinafter, an embodiment of the pants-type absorbent article according to the present invention will be described by taking a pants-type disposable diaper for infants as an example. However, the pants-type absorbent article according to the present invention is not limited to the above, and can also be applied to pants-type disposable diapers for adults, sanitary shorts, etc.

[0038] === Composition of pants-type disposable diaper 1 === Fig. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper"). Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and extended state. Fig. 3 is a plan view illustrating the configuration of an absorbent main body 10 and a leakage preventing wall portion 50. Fig. 4 is a schematic cross-sectional view taken along line AA in Fig. 3. The "unfolded state" of a pants-type diaper refers to a state in which the diaper 1 is opened in the longitudinal direction after the waist joint portion 40, which will be described later, has been unwound to separate the pair of waist portions 20, 30.

[0039] In the pants-type state shown in FIG. 1, the diaper 1 has a vertical direction, a width direction, and a front-rear direction that intersect with each other, and is formed with a waist opening BH and a pair of leg openings LH. In the unfolded state shown in FIG. 2, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction that intersect with each other. The longitudinal direction is the direction along the vertical direction in the pants-type state. The thickness direction is the direction in which the members constituting the diaper 1 are layered (see FIG. 4). In the vertical direction, the waist opening BH side is the upper side, and the crotch side is the lower side. In the front-rear direction, the side that faces the wearer's abdomen is the front side, and the side that faces the wearer's back is the rear side. In the thickness direction, the side that comes into contact with the wearer's body (skin) is the skin side, and the side that does not come into contact with the wearer's body (skin) is the non-skin side.

[0040] In addition, the "stretched state" of the diaper 1 refers to a state in which the entire diaper 1 (the entire product) is stretched without wrinkles by stretching each elastic member of the diaper 1 (e.g., the leg elastic member 17 and the waist elastic members 23, 33 described below), specifically, a state in which each component constituting the diaper 1 (e.g., the absorbent body 10 and the waist portions 20, 30 described below) is stretched until the dimensions of the component alone match or are close to the dimensions of the component alone.

[0041] The diaper 1 also has a pair of waist-surrounding portions 20, 30 and an absorbent body 10. Of the pair of waist-surrounding portions 20, 30, the one that is placed against the wearer's abdominal side is referred to as a abdominal-side waist-surrounding portion 20, and the other that is placed against the wearer's dorsal side is referred to as a dorsal-side waist-surrounding portion 30.

[0042] In the developed state of the diaper 1 shown in FIG. 2, one end of the absorbent body 10 in the longitudinal direction is disposed in the center of the ventral waist portion 20 in the width direction, and a first joint portion 42 is formed by joining the non-skin side of the end of the one side to the ventral waist portion 20 with an adhesive such as a hot melt adhesive. Similarly, the other end of the absorbent body 10 in the longitudinal direction is disposed in the center of the back waist portion 30 in the width direction, and a second joint portion 44 is formed by joining the non-skin side of the end of the other side to the back waist portion 30 with an adhesive such as a hot melt adhesive. In the developed state of the diaper 1, the absorbent body 10 is folded in half at the center position FL in the longitudinal direction, and both sides in the width direction of the ventral waist portion 20 and the back waist portion 30 are joined at a pair of waist joint portions 40, thereby forming the pants-type diaper 1 shown in FIG. 1. Examples of the joining method at the waist joint portion 40 include welding and joining with an adhesive.

[0043] 4, the absorbent main body 10 includes an absorbent body 11, a liquid-permeable top sheet 12 arranged closer to the skin than the absorbent body 11, and a back sheet 13 arranged closer to the skin than the absorbent body 11 and forming an exterior of the absorbent main body 10. In addition, a pair of leakage prevention walls 50 are provided on both sides of the absorbent body 11 in the width direction.

[0044] The absorbent body 11 has an absorbent core 11A that absorbs and retains excreted liquids such as urine, and a liquid-permeable core wrap sheet 11B that covers the absorbent core 11A. An example of the absorbent core 11A is liquid-absorbent fiber such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape. On the other hand, an example of the core wrap sheet 11B is tissue paper.

[0045] The absorbent core 11A of this embodiment has a waisted portion 11AC between its longitudinal front end and rear end (front upper end and rear upper end in the up-down direction) that is shorter (narrower) in length in the width direction than the front end and rear end, and has a generally hourglass shape in plan view as shown in Fig. 3. This waisted portion 11AC is the portion that is sandwiched between the legs of the wearer when the diaper 1 is worn, and the shorter width (narrower) of this portion allows the absorbent core 11A to easily fit between the wearer's crotch.

[0046] In this embodiment, the absorbent 11 (absorbent core 11A) has a pair of low basis weight parts 15 extending in the longitudinal direction at the center in the width direction. Here, basis weight means mass per unit area, and the low basis weight parts 15 are parts whose basis weight is smaller than the surroundings. In addition, the low basis weight parts 15 in this embodiment also include cases where the basis weight is zero. By having the low basis weight parts 15 in the absorbent 11, it is possible to induce the deformation of the absorbent 11 so as to fit the crotch part of the wearer starting from the low basis weight parts 15. In addition, when the wearer urinates, urine can be quickly diffused in the longitudinal direction along the low basis weight parts 15. The number and arrangement of the low basis weight parts 15 are not limited to the configuration of the low basis weight parts 15 in this embodiment, but it is preferable to provide a pair of low basis weight parts 15 along the longitudinal direction. For example, when only one low basis weight section 15 is provided, it becomes difficult to obtain the diffusion effect of the low basis weight section 15 if the urination position shifts left or right, but by providing two, the diffusion effect of the low basis weight section 15 can be obtained even when the wearer is lying on his or her side. Also, by providing a pair of low basis weight sections 15 with a gap in the width direction, the central section in the width direction sandwiched between the pair of low basis weight sections 15 becomes easier to deform into a cup shape, making it easier to induce the absorbent body 11 to deform to fit the wearer's body.

[0047] In addition, when a pair of low basis weight parts 15 are arranged in the absorbent body 11, the length (spacing) between the low basis weight parts 15, 15 in the width direction is preferably 25 mm or more, more preferably 30 mm or more. This ensures the absorption capacity in the vicinity of the wearer's urination opening. In addition, the width of each of the pair of low basis weight parts 15 is preferably 5 to 20 mm, more preferably 8 to 12 mm. If the width is 5 mm or less, it is difficult to maintain the shape of the low basis weight parts 15, and the effect of diffusing excreted liquid is also difficult to achieve. On the other hand, if the width is 20 mm or more, the absorption capacity in the vicinity of the urination opening decreases, and there is a risk of the transfer of excreted liquid to the adjacent absorbent body 11 decreasing.

[0048] 2, the absorbent body 11 has compressed parts 18 on both sides in the longitudinal direction, which are formed by embossing the absorbent core 11A. The compressed parts 18 will be described in detail later.

[0049] The top sheet 12 is a sheet-like member that covers the absorbent body 11 from the skin side, and is formed, for example, from a liquid-permeable nonwoven fabric having a planar size larger than that of the absorbent body 11.

[0050] The back sheet 13 is a sheet-like member that covers the absorbent body 11 from the non-skin side, and is a sheet member with a planar size larger than the absorbent body 11. The back sheet 13 is a sheet member with a two-layer structure consisting of a back film 13a that is a liquid-impermeable, leak-proof sheet such as polyethylene or polypropylene, and an exterior sheet 13b such as a nonwoven fabric provided on the non-skin side of the back film 13a.

[0051] The exterior sheet 13b has an extension portion 13bf that extends outwardly from both ends 11es, 11es of the absorbent body 11 in the width direction (see FIG. 3). The extension portion 13bf is folded back inward in the width direction and toward the skin in the thickness direction with the ends 10es, 10es of the absorbent main body 10 in the width direction as folding positions, and overlapped in the thickness direction to form a side flap SF. In the side flap SF, a plurality of leg elastic members 17, 17... such as rubber thread are fixed at a predetermined interval in the width direction in a state where each is stretched in the longitudinal direction (vertical direction) between the exterior sheets 13bf, 13bf folded in the thickness direction. This gives the side flap SF elasticity along the vertical direction (longitudinal direction of the absorbent main body 10).

[0052] The leakage preventing walls 50 are provided on both sides in the width direction and on the skin side in the thickness direction of the absorbent body 11. When the diaper 1 is worn, the leakage preventing walls 50 rise from both sides in the width direction of the absorbent body 11 toward the skin side of the wearer, thereby preventing excrement from leaking out of the absorbent main body 10.

[0053] The leakproof wall portion 50 of this embodiment has a leakproof wall sheet 51 and a plurality of leakproof wall elastic members 52. The leakproof wall sheet 51 is a flexible rectangular sheet member made of, for example, nonwoven fabric. Then, both ends in the width direction of the absorbent main body 10 are joined along the up-down direction (the longitudinal direction of the absorbent main body 10), and as shown in Fig. 4, the inner end 50is in the width direction is folded back to the outside in the width direction. A plurality of leakproof wall elastic members 52, 52... such as rubber thread are fixed at a predetermined interval in the width direction in a state stretched in the up-down direction between the leakproof wall sheets 51, 51 folded back at the inner end 50is and overlapped in the thickness direction.

[0054] 3, the leakage preventing wall 50 is joined to the absorbent main body 10 by a first joining region 55 and a second joining region 56 formed with a joining material such as a hot melt adhesive. The first joining region 55 is a band-shaped region provided along the up-down direction (the longitudinal direction of the absorbent main body 10) at the outer end in the width direction of the leakage preventing wall 50, and joins the leakage preventing wall 50 to the skin side of the side flap SF. The second joining region 56 is provided at both ends in the longitudinal direction of the absorbent main body 10 (upper ends in the up-down direction), and joins both ends in the longitudinal direction of the leakage preventing wall 50 to the skin side of the top sheet 12.

[0055] The leakproof wall elastic members 52, 52... impart stretchability in the up-down direction (longitudinal direction) to the leakproof wall portion 50, and when the diaper 1 is worn, the stretchability causes the inner end portion (inner end 50is) in the width direction of the leakproof wall portion 50 to stand up against the wearer's skin. In other words, the first bonding region 55 functions as a base end portion that cannot stand up in the thickness direction of the leakproof wall portion 50, and a standing portion (50is) that can stand up against the skin in the thickness direction is provided by the leakproof wall elastic members 52, 52... that are stretchable in the longitudinal direction, with the base end portion (55) as a fulcrum.

[0056] The ventral waist portion 20 and the rear waist portion 30 each include an inner layer sheet 21, 31, an outer layer sheet 22, 32 laminated on the inner layer sheet 21, 31, and a plurality of waist elastic members 23, 33.

[0057] The outer layer sheets 22, 32 are disposed closer to the skin than the inner layer sheets 21, 31. The inner layer sheets 21, 31 and the outer layer sheets 22, 32 are disposed closer to the skin than the absorbent body 10. The inner layer sheets 21, 31 and the outer layer sheets 22, 32 alone are non-stretchable sheets that do not substantially have stretchability in the width direction of the diaper 1. As the inner layer sheets 21, 31 and the outer layer sheets 22, 32, SMS nonwoven fabrics (spunbond, meltblown, spunbond nonwoven fabrics), spunbond nonwoven fabrics, air-through nonwoven fabrics, plastic sheets, perforated plastic sheets, laminate sheets thereof, etc. can be used.

[0058] The multiple waist elastic members 23, 33 are arranged vertically between the inner layer sheets 21, 31 and the outer layer sheets 22, 32, and are fixed in a stretched state in the width direction. Therefore, the ventral waist portion 20 and the back waist portion 30 stretch in the width direction to fit the waist of the wearer. Examples of the waist elastic members 23, 33 include thread-like elastic members such as rubber and spandex.

[0059] In the back waist portion 30 of this embodiment, a waist elastic member 33 is arranged from the upper end to the lower end. On the other hand, no waist elastic member 23 is arranged at the upper end of the ventral waist portion 20, and instead, a stretchable sheet 24 that stretches in the width direction is arranged. In this way, by arranging the stretchable sheet 24 without arranging the waist elastic member 23 at the upper end of the ventral waist portion 20, the upper end of the ventral waist portion 20 can be easily fitted closely to the body (skin) of the wearer.

[0060] Next, the compressed portions 18 will be described in detail. In the absorbent body 11, the absorbent core 11A has a plurality of linear compressed portions 18. In these "compressed portions", the absorbent core 11A is compressed in the thickness direction by embossing. Specifically, each linear compressed portion 18 has two ends, one end and the other end, is arranged in an oblique shape intersecting the longitudinal direction and the width direction, and has a predetermined length in the longitudinal direction and the width direction. It has a plurality of approximately diamond-shaped inner regions surrounded on all four sides by the compressed portions 18. By compression, the fiber density of the absorbent core 11A is higher than that of the non-compressed portions, and excrement is easily absorbed by the compressed portions 18 by capillary action. It should be noted that, although the compressed portion 18 in this embodiment is shown by a bold solid line in Figures 2 and 3, this is for the convenience of explanation, and in reality, it is formed by embossing the absorbent core 11A as described above, and therefore is not clearly visible from the skin side of the diaper 1.

[0061] In addition, although the compressed portions 18 in this embodiment are formed linearly, the linear compressed portions 18 may be formed by a collection of multiple dot-like (circular) compressed portions. Alternatively, dot-like or linear compressed portions may be formed discretely within a predetermined region. In addition, as for the formation pattern of the compressed portions 18, the compressed portions 18 as shown in FIG. 2 are arranged so as to appear as a lattice pattern (so-called quilting pattern) as a whole, but other patterns may also be used. Furthermore, each line constituting the lattice pattern may be formed by a straight line as shown in FIG. 2, or may be formed by a curved line.

[0062] In the compressed portion 18 in this embodiment, the absorbent core 11A is in a state compressed in the thickness direction, but it is sufficient that at least the absorbent core 11A is in a state compressed in the thickness direction, and other than this, for example, the absorbent core 11A, the core wrap sheet 11B, and the top sheet 12 may be in a state compressed in the thickness direction. In other words, the absorbent core 11A and the core wrap sheet 11B (the absorbent body 11) and the top sheet 12 may have the compressed portion 18.

[0063] In the diaper 1 of this embodiment, a low basis weight section 15 is provided in the absorbent body 11 along the longitudinal direction, and when the wearer excretes, excreted liquid can be guided and diffused along the low basis weight section 15 to the front and rear of the absorbent body 11 in the longitudinal direction. The compressed sections 18 of the absorbent body 11 are sections in which the fiber density of the absorbent core 11A is higher than that of the non-compressed sections, and since the basis weight of the low basis weight sections 15 is smaller than that of the surrounding areas or is zero, the compressed sections 18 other than the sections overlapping with the low basis weight sections 15 in the thickness direction are high rigidity sections. Specifically, in the diaper 1, the compressed sections 18 not overlapping with the low basis weight sections 15 in the thickness direction are high rigidity sections having a higher rigidity than the central position FL (FIG. 2) of the diaper 1 when folded in half. Here, "at the central position FL" refers to the area sandwiched between a pair of low-profile areas 15 within the central position FL (also called the center line FL) where the diaper 1 is folded in half, and having a width of 1 cm in both directions in the longitudinal direction with the center line as the center.

[0064] The stiffness values ​​of the compressed portions 18 and the region at the central position FL of the diaper 1 may be, for example, values ​​measured by Gurley stiffness divided by the length of the sample piece. The Gurley stiffness may be measured in accordance with JIS-L1096 using, for example, a Gurley type softness tester No. 311 manufactured by Yasuda Seiki Seisakusho Co., Ltd. In this embodiment, since it is sufficient to confirm the magnitude relationship of stiffness at the compressed portions 18 and the central position FL, it is not necessary to obtain precise values, and some error in the measured values ​​is acceptable.

[0065] The low basis weight portion 15, which is disposed at least in the center in the longitudinal direction corresponding to the wearer's crotch, guides and diffuses absorbed excreted liquid in the longitudinal direction while also serving as a folding starting point for deforming the absorbent body 11, thereby enabling the absorbent body 11 to fit the body (crotch area). On the other hand, if the low basis weight portion 15 extends to the ventral waist portion 20 or the rear waist portion 30 or to the vicinity thereof, there is a risk that deformation due to folding will reach the first joint portion 42 (second joint portion 44) that joins the absorbent main body 10 and the ventral waist portion 20 (rear waist portion 30), specifically, to the longitudinal end portion of the absorbent body 11, causing leakage.

[0066] In this regard, the diaper 1 of the present embodiment has a high-rigidity portion that is higher than the rigidity at the center position FL in at least one of the longitudinal portions between the inner end 42in of the first joint 42 and the outer end 15ea of ​​the low basis weight portion 15 and between the inner end 44in of the second joint 44 and the outer end 15eb of the low basis weight portion 15 (both in the present embodiment). This allows urine to be quickly diffused throughout the absorbent body 11 after urination along the low basis weight portion 15, while the high-rigidity portion located outside the longitudinal outer end 15ea (15eb) of the low basis weight portion 15 can suppress deformation of the absorbent body 11 toward the longitudinal outside of the low basis weight portion 15. Therefore, by preventing deformation up to the longitudinal end of the absorbent main body 10, leakage can be suppressed.

[0067] In addition, it is preferable that the low basis weight portion 15 and the high stiffness portion are present on the longitudinal extension line. In other words, it is preferable that the low basis weight portion 15 and the high stiffness portion have a portion that overlaps in the width direction. Even if the high stiffness portion is disposed at a position that is not on the longitudinal extension line of the low basis weight portion 15, the presence of the high stiffness portion on the longitudinal outer side of the low basis weight portion 15 can make it difficult for the absorbent body 11 to deform, but the presence of the high stiffness portion on the longitudinal extension line of the low basis weight portion 15 can more reliably suppress the induction of deformation of the absorbent body 11 originating from the low basis weight portion 15.

[0068] As shown in FIG. 2, the diaper 1 of the present embodiment has a non-compressed region 11X in which no compressed portion 18 is provided in a predetermined range including the central position FL of the diaper 1 folded in half in the longitudinal direction. The "predetermined range including the central position FL" refers to a region having a predetermined width in the longitudinal direction from the central position FL to the front and rear, and is not limited to the range shown in FIG. 2. The non-compressed region 11X is a portion that contacts the crotch of the wearer when the diaper 1 is worn, and by not providing the compression portion 18 in the crotch portion, the function of instantly absorbing excreted urine and quickly dispersing it in the longitudinal direction by the low basis weight portion 15 can be further improved. Furthermore, by providing the non-compressed region 11X in the crotch, there is no portion with high rigidity (so-called high rigidity portion), so that the diaper 1 can easily fit to the crotch area by, for example, closing the wearer's legs.

[0069] As described above, the compressed portion 18 is a portion that does not overlap the low basis weight portion 15 in the thickness direction. In other words, in the diaper 1 of the present embodiment, at least a part of the portion 11va that overlaps the first joint 42 in the thickness direction or the portion 11vb that overlaps the second joint 44 in the absorbent body 11 has a high rigidity portion. In the present embodiment, in the first joint 42 and the second joint 44, adhesive (not shown) for joining each end of the absorbent main body 10 in the longitudinal direction to each waist portion (the ventral waist portion 20 and the rear waist portion 30) is intermittently provided in the width direction along the longitudinal direction. By providing the adhesive intermittently, it is possible to prevent the first joint 42 and the second joint 44 from becoming too hard. The portion where the adhesive of the first joint 42 or the second joint 44 provided in this way overlaps the compressed portion 18 in the thickness direction has a higher rigidity, so that deformation of the low basis weight portion 15 can be more reliably prevented. That is, the deformation of the low basis weight portion 15 is suppressed by the high rigidity portion between the inner end 42in (44in) of the first joint 42 (second joint 44) and the outer end 15ea (15eb) of the low basis weight portion 15, and the deformation can be suppressed more reliably by the portion where the adhesive of the first joint 42 or the second joint 44 and the high rigidity portion overlap when viewed in the thickness direction. Therefore, the deformation can be suppressed neatly without causing unnatural folds or wrinkles due to abrupt suppression. In addition, by providing the adhesive intermittently in the width direction, it is possible to prevent the entire first joint 42 and the second joint 44 from becoming excessively hard even if it overlaps with the compressed portion 18, and to make it difficult for the wearer to feel uncomfortable. The arrangement of the adhesive in the first joint 42 and the second joint 44 is not limited to the arrangement in this embodiment, and it is possible to apply it in any pattern.

[0070] FIG. 5 is a schematic plan view of the ventral side and the dorsal side of the diaper 1 showing a virtual line H. In the ventral side view of FIG. 5, a virtual line H is drawn from each of the positions of the inner ends 42ei, 42ei in the longitudinal direction of both ends 42e, 42e of the first joint 42 to a center point C1 in the width direction of the diaper 1 in the longitudinal direction of the center position FL. Similarly, in the dorsal side view of FIG. 5, a virtual line H is drawn from each of the inner ends 44ei, 44ei in the longitudinal direction of both ends 44e, 44e of the second joint 44 to a center point C1 in the width direction of the center position FL in the longitudinal direction of the diaper 1. When a user wears the diaper 1, a fold line is likely to occur in the absorbent main body 10 along at least a part of the virtual line H after urination. In this embodiment, the low basis weight portion 15 extends outward in the longitudinal direction from the virtual line H in the longitudinal direction. Furthermore, the portion that overlaps with the longitudinal end 15e of the low basis weight portion 15 when viewed in the thickness direction (i.e., the direction penetrating the paper surface) has a compressed portion 18. When the embossed compressed portion 18 overlaps with the low basis weight portion 15 in this way, normally the compressed portion 18 is likely to be divided at the portion where it overlaps with the low basis weight portion 15, but here, even if the divided portion is connected with an extension line to form a linear compressed portion 18, it can still be considered that the paper has been embossed.

[0071] If the low basis weight section 15 is located below the imaginary line H (inner in the longitudinal direction), there is a risk that the diffusion of excreted liquid by the low basis weight section 15 will be interrupted by the fold that occurs along the imaginary line H. On the other hand, if the low basis weight section 15 is at the same position as the imaginary line H or extends to the outer side in the longitudinal direction (upward in the up-down direction) of the imaginary line H, the diffusion of excreted liquid is less likely to be interrupted. Furthermore, since the portion overlapping the end 15e of the low basis weight section 15 in the thickness direction has the compressed section 18, the lifting ability of the liquid at the end 15e of the low basis weight section 15 is improved, and the liquid that has flowed down the low basis weight section 15 can be further diffused by the compressed section 18.

[0072] As shown in FIG. 5, when the absorbent body 10 is folded in half at the center position FL, the side where the ventral waistline portion 20 and the rear waistline portion 30 are arranged is the top side in the vertical direction, and the center position FL is the bottom side. In such a vertical direction, the length L1 of the low basis weight portion 15 on the front side (see the ventral side view in FIG. 5) is longer than the length L2 of the low basis weight portion 15 on the rear side (see the rear side view in FIG. 5). By extending the length of the low basis weight portion 15 on the ventral side close to the urination opening, urine after urination can move in the vertical direction along the low basis weight portion 15, thereby improving the diffusibility of excreted liquid. On the other hand, if the low basis weight portion 15 is provided too long on the rear side, there is a risk that the low basis weight portion 15 will promote deformation of the absorbent body 10 and make it difficult to secure a sufficient feces storage space, so it is preferable to provide it within a range that is not too long.

[0073] Furthermore, in this embodiment, as shown in the rear view of Fig. 5, a part of the lower end of the compressed portion 18 is provided so as to straddle the imaginary line H in a plan view. By providing the compressed portion 18 so as to straddle at least a part of the imaginary line H in a plan view in this way, folding of the absorbent body 11 along the imaginary line H, which is likely to occur after urination, can be suppressed, and the diffusion of excreted liquid can be prevented from being interrupted by such folding.

[0074] FIG. 6 is a plan view showing only the ventral absorber 11 when the diaper 1 is folded in half at the longitudinal center position FL. This figure shows only the absorber 11 for the sake of easily explaining the squeezing portion 18 and the pair of low basis weight portions 15. As shown in FIG. 6, in the longitudinal direction, there are provided a overlapping region X2 having the squeezing portion 18 so as to overlap with the low basis weight portion 15, and a non-overlapping region X1 having the squeezing portion 18 outside (upper side in the vertical direction) of the overlapping region X2. And the length LE2 of the overlapping region X2 is shorter than the length LE1 of the non-overlapping region X1 (LE1>LE2). The overlapping region X2 is a region that transfers the excreted liquid that has migrated along the low basis weight portion 15 to the non-overlapping region X1. The non-overlapping region X1 is a region where the low basis weight region 15 does not exist. Since the compression portion 18 in the non-overlapping region X1 is a high-rigidity portion, it is a region that can suppress the deformation of the absorber 11 and further spread the excreted liquid over a wider range by the effect of pulling up the excreted liquid by the squeezing portion 18. If the overlapping region X2 does not exist, there is a risk that the transfer of the excreted liquid to the non-overlapping region X1 will not go well, so it is necessary to provide the overlapping region X2 at a minimum. Also, if the overlapping region X2 is provided longer than the non-overlapping region X1 (LE1<LE2), the low basis weight portion 15 that becomes the folding start point of the absorber 11 will be formed longer, causing unnecessary deformation of the absorber 11 and increasing the possibility of leakage. Not only when the length LE2 of the overlapping region X2 is provided shorter than the length LE1 of the non-overlapping region X1 as in the present embodiment, that is, by providing an overlapping region X2 whose length in the longitudinal direction is equal to or less than the length of the non-overlapping region X1, compared with the case of providing an overlapping region X2 whose length LE2 in the longitudinal direction is longer than the length LE1 of the non-overlapping region X1, even with a smaller overlapping region X2, the liquid transfer by the low basis weight portion 15 and the liquid diffusion in the non-overlapping region X1 are more likely to occur smoothly.

[0075] 6, in the vertical direction, the region of the low basis weight portion 15 from the lower end of the overlap region X2 to the center position FL is defined as the low basis weight portion central region 15ce, and the length LE3 of the low basis weight portion central region 15ce is longer than the length LE2 of the overlap region X2. The low basis weight portion central region 15ce is a region close to the wearer's urination opening, and if the overlap region X2 is provided longer than the low basis weight portion central region 15ce, there is a risk of leakage due to a decrease in instantaneous absorption performance near the urination opening. Therefore, by providing the length LE3 of the low basis weight portion central region 15ce longer than the length LE2 of the overlap region X2, excreted urine is quickly transferred in the longitudinal direction in the low basis weight portion 15, and excreted liquid is handed over in the overlap region X2, which makes it easier for the excreted liquid to spread over a wide area.

[0076] In addition, in the absorbent 11 shown in FIG. 6, the length LE1 of the non-overlapping region X1 is preferably longer than the length LE3 of the low basis weight central region 15ce. If the low basis weight central region 15ce is extended too far toward the ventral side, there is a risk of leakage due to insufficient area for absorbing excreted liquid such as urine after it is transferred and diffused. Furthermore, if the back low basis weight central region 15ce is extended too far toward the back side, deformation of the absorbent body 10 (absorbent 11) is promoted, and there is a risk of leakage due to insufficient space for storing feces. Therefore, by providing the low basis weight central region 15ce within an appropriate range and providing the non-overlapping region X1 longer, after rapid liquid diffusion in the low basis weight portion 15, the liquid lifting effect of the non-overlapping region X1 provided in a wider range can promote wide-area liquid diffusion.

[0077] In this embodiment, the non-overlapping region X1 extends to the longitudinal end (end 11eL in FIG. 3) or widthwise end (end 11eW in FIG. 3) of the absorbent 11. This allows the excreted liquid migrated in the longitudinal direction by the low basis weight portion 15 to be diffused over a wide range to the longitudinal end 11eL or widthwise end 11eW of the absorbent 11 by capillary action of the compressed portions 18 of the non-overlapping region X1, thereby achieving more efficient absorption.

[0078] In addition, in this embodiment, the high-rigidity portion having the compressed portion 18 may be formed in a line shape or a dot shape as described above. More specifically, the high-rigidity portion has a portion in which a high-density portion having a higher density than the surroundings is formed in a line shape, but this is not limited thereto. The high-rigidity portion may have a portion in which a plurality of dot-like high-density portions having a higher density than the surroundings are formed. In the portion in which the high-density portion is formed in a line shape, the excreted liquid can be diffused further by running through the linear high-density portion. In addition, it is also possible to adjust the rigidity to an arbitrary value by the linear pattern. In the portion in which a plurality of dot-like high-density portions are formed, each point of the high-density portion becomes a liquid drawing starting point, and the drawn liquid spreads around each point, thereby diffusing the excreted liquid.

[0079] 4, the absorbent 11 has an absorbent core 11A and a core wrap sheet 11B, and in the low basis weight portion 15 of this embodiment, the core wrap sheet 11Bu located on the skin side in the thickness direction and the core wrap sheet 11Bd located on the non-skin side are bonded with an adhesive. In the low basis weight portion 15, if the skin-side and non-skin-side core wrap sheets 11Bu and 11Bd are not bonded to each other, there is a risk that the low basis weight portion 15 will disappear due to swelling of the absorbent 11 when absorbing urine, movement of the internal components of the absorbent core 11A, etc. By bonding the skin-side and non-skin-side core wrap sheets 11Bu and 11Bd to each other, the loss of the low basis weight portion 15 can be prevented, and the low basis weight portion 15 can continuously achieve the effect of transferring and diffusing excreted liquid. ===Other embodiments===

[0080] 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 and improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

[0081] In the above-described embodiment, as shown in Fig. 3, the compressed portions 18 are provided in the width direction up to the ends 11eW, 11eW of the absorber 11, but this is not limited thereto. The diaper 1 has a leakage preventing wall portion 50, and the compressed portions 18 may be provided in the entire region in the width direction from the inner end 55is of one base end (55) of the leakage preventing wall portion 50 to the inner end 55is of the other base end (55). It is preferable that the inner side of the leakage preventing wall portion 50 in the width direction does not deform in order to block excreted urine, and by providing the compressed portions 18 between the base ends 55, 55, deformation is suppressed, thereby further improving the leakage preventing function.

[0082] In the above embodiment, the high stiffness portion has the embossed compressed portion 18, but is not limited to this. The high stiffness portion may be formed by increasing the basis weight of the absorbent core 11A, or by attaching another material thereto.

[0083] In addition, in the above embodiment, a diaper in which the ventral waist section 20 and the rear waist section 30 are separate and distinct components has been exemplified, but the ventral waist section 20 and the rear waist section 30 may be a continuous single component with a crotch section provided between them.

[0084] In the above embodiment, the absorbent core 11A has a constricted portion 11AC between the front end and the rear end in the longitudinal direction, but this is not limited to this. For example, the absorbent core 11A (absorbent body 11) may be rectangular. The absorbent core 11A having a rectangular shape can maintain the capacity to absorb excreted liquid. [Explanation of symbols]

[0085] 1. Pants-type disposable diapers (pants-type absorbent articles), 10 absorbent body, 10es both ends in width direction, 11 absorbent body, 11A absorbent core, 11AC constriction portion, 11B core wrap sheet, 11Bd core wrap sheet, 11Bu core wrap sheet, 11eL end, 11es end, 11eW edge, 11va overlap, 11vb overlap, 11X non-compressed area, 12 top sheet, 13 back sheet, 13a Back film, 13b Exterior sheet, 13bf extension part, 15 low basis weight part, 15ce center area of ​​basis weight, 15e end, 15ea outer end in longitudinal direction, 15eb outer end in longitudinal direction, 17 leg elastic member, 18 compression portion, 20 ventral waist portion, 21 inner layer sheet, 22 outer layer sheet, 23 waist elastic member, 24 stretchable sheet, 30 back side waist portion, 31 inner layer sheet, 32 outer layer sheet, 33 waist elastic member, 40 waist joint, 42 first joint portion, 42e both ends in the width direction, 42ei inner end, 42in inner end, 44 second joint, 44e both ends in width direction, 44ei inner end, 44in inner end, 50 Leakage prevention wall part, 50is standing part (inner end), 51 leak-proof wall sheet, 52 leak-proof wall elastic member, 55 first joint region, 55 proximal end (first joint region), 55is inner edge, 56 second joint area,

Claims

1. In the deployed state, the sheet has a longitudinal direction, a width direction, and a thickness direction which intersect with each other, The garment has a ventral waist portion, a rear waist portion, and an absorbent body having an absorbent body, A pants-type absorbent article in which the absorbent main body is folded in half at a central position in the longitudinal direction, and both side portions in the width direction of the ventral waist portion and the rear waist portion are joined at a pair of waist joints, a first joining portion at which a non-skin side of one end of the absorbent body in the longitudinal direction and the abdominal side waist portion are joined by an adhesive; a second joining portion at which a non-skin side of the end portion on the other side in the longitudinal direction of the absorbent main body and the back-side waist portion are joined by an adhesive; having The absorbent body has a low basis weight portion at least in a central portion in the longitudinal direction, the low basis weight portion having a basis weight lower than that of a periphery along the longitudinal direction, the low basis weight portion is provided in a pair and is composed of a one-side low basis weight portion provided on one side in the width direction and an other-side low basis weight portion provided on the other side, In the longitudinal direction, the absorbent body has a high-rigidity portion having a higher rigidity than the most rigid portion at the central position at least one of a portion between an inner end of the first joint portion and an outer end of the low-grammage portion and a portion between an inner end of the second joint portion and an outer end of the low-grammage portion, In the longitudinal direction, the high stiffness portion extends from a position overlapping with the low basis weight portion to a position overlapping with the waist seam. A pants-type absorbent article characterized by:

2. The pants-type absorbent article according to claim 1, The high stiffness portion has a compressed portion, When a virtual line is drawn from each position of the inner end in the longitudinal direction at both ends in the width direction of the first joint portion or the second joint portion to a center point in the width direction of the central position, the low basis weight portion is located at the same position as the imaginary line in the longitudinal direction or extends outward from the imaginary line in the longitudinal direction, The portion of the low basis weight portion overlapping the end portion in the longitudinal direction as viewed in the thickness direction has a compressed portion. A pants-type absorbent article characterized by:

3. The pants-type absorbent article according to claim 1 or 2, The high stiffness portion has a compressed portion, In the longitudinal direction, a non-compressed region where no compressed portion is provided is provided in a predetermined range including the central position. A pants-type absorbent article characterized by:

4. The pants-type absorbent article according to any one of claims 1 to 3, At least a part of the absorbent body that overlaps with the first joint portion or the second joint portion when viewed in the thickness direction has a high rigidity portion. A pants-type absorbent article characterized by:

5. The pants-type absorbent article according to any one of claims 1 to 3, The adhesive in the first joint portion and the second joint portion is provided intermittently in the width direction along the longitudinal direction, At least a part of the absorbent body that overlaps with the first joint portion or the second joint portion when viewed in the thickness direction has a high rigidity portion. A pants-type absorbent article characterized by:

6. A pants-type absorbent article according to any one of claims 1 to 5, The high stiffness portion has a compressed portion, In the longitudinal direction, An overlapping region having a compressed portion so as to overlap with the low basis weight portion, and a non-overlapping region having a compressed portion on the outer side of the overlapping region are provided, The length of the overlapping region is less than or equal to the length of the non-overlapping region. A pants-type absorbent article characterized by:

7. A pants-type absorbent article according to any one of claims 1 to 6, The high stiffness portion has a compressed portion, When the absorbent main body is folded in half at the central position, the absorbent main body has a vertical direction in which the side on which the ventral waistline portion and the rear waistline portion are arranged is the upper side and the central position is the lower side, In the up-down direction, an overlapping region having a compressed portion so as to overlap the low basis weight portion; In the low basis weight portion, a region from the lower end of the overlapping region to the central position is defined as a low basis weight portion central region, The length of the low basis weight central region is greater than the length of the overlap region. A pants-type absorbent article characterized by:

8. The pants-type absorbent article according to any one of claims 1 to 7, The high stiffness portion has a compressed portion, When the absorbent main body is folded in half at the central position, the absorbent main body has a vertical direction in which the side on which the ventral waistline portion and the rear waistline portion are arranged is the upper side and the central position is the lower side, In the up-down direction, An overlapping region having a compressed portion so as to overlap with the low basis weight portion, and a non-overlapping region having a compressed portion above the overlapping region are provided, In the low basis weight portion, a region from the lower end of the overlapping region to the central position is defined as a low basis weight portion central region, The length of the non-overlapping region is greater than the length of the low basis weight central region. A pants-type absorbent article characterized by:

9. A pants-type absorbent article according to any one of claims 1 to 8, The high rigidity portion is A linearly formed high density area that is denser than the surrounding area, or Areas where multiple dot-like high-density areas with higher density than the surrounding area are formed have A pants-type absorbent article characterized by:

10. A pants-type absorbent article according to any one of claims 1 to 9, In a state where the absorbent main body is folded in half at the central position, the side where the ventral waistline portion and the dorsal waistline portion are arranged is defined as the upper side, and the central position is defined as the lower side in a vertical direction, and the side where the ventral waistline portion is present is defined as the front side, and the side where the dorsal waistline portion is present is defined as the rear side. In the up-down direction, the length of the low basis weight portion on the front side is longer than the length of the low basis weight portion on the rear side. A pants-type absorbent article characterized by:

11. A pants-type absorbent article according to any one of claims 1 to 10, The high stiffness portion has a compressed portion, An overlapping region having a compressed portion so as to overlap with the low basis weight portion in the longitudinal direction, and a non-overlapping region having a compressed portion on the outer side of the overlapping region in the longitudinal direction are provided, The non-overlapping region extends to an end portion in the longitudinal direction or an end portion in the width direction of the absorbent body. A pants-type absorbent article characterized by:

12. The pants-type absorbent article according to claim 2, A pants-type absorbent article, characterized in that a compressed portion is provided so as to straddle at least a part of the imaginary line in a plan view.

13. A pants-type absorbent article according to any one of claims 1 to 12, The absorbent body has an absorbent core and a liquid-permeable core wrap sheet covering the absorbent core from the skin side and the non-skin side in the thickness direction, In the low basis weight portion, the core wrap sheet located on the skin side and the core wrap sheet located on the non-skin side are joined together. A pants-type absorbent article characterized by:

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