Absorbent article

Abstract

To provide a technique capable of suppressing falling of three-dimensional gathers inward in a width direction.SOLUTION: An absorbent article comprises an absorber, a top sheet, and a pair of right and left leakage prevention sheets. The leakage prevention sheets have: base end part side pieces bonded to the top sheet; folded parts folded to a skin surface side from the base end part side pieces and to the outside in a width direction; free end part side pieces extending outside in the width direction from the folded parts; a base end fixing part where each of both end parts in a longitudinal direction of the base end part side pieces is fixed to the top sheet; free end fixing parts where both end parts in the longitudinal direction of the free end part side pieces are fixed to the base end part side pieces; and a plurality of elastic members adhered to the free end part side pieces in an elongated state, and extending in the longitudinal direction. Regarding distances between the free end fixing parts on both sides in the longitudinal direction, the distance outside in the width direction is longer than the distance inside in the width direction, and among the plurality of elastic members, the elongation rate of the elastic member located outside in the width direction is lower than the elongation rate of the elastic member located inside in the width direction.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to absorbent articles.

Background Art

[0002] Disposable diapers, urine pads, sanitary products, and other absorbent articles have been developed (see, for example, Patent Document 1). Patent Document 1 discloses a diaper provided with three-dimensional gathers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Absorbent articles generally include three-dimensional gathers to suppress lateral leakage of excreta. The three-dimensional gathers stand up on the skin surface side of the wearer by the contraction force of the thread rubber and contact the skin surface to suppress lateral leakage of excreta. However, if the three-dimensional gathers do not stand up on the skin surface side and fall inward in the width direction, a gap may be formed between the gathers and the skin surface, and there is a risk that excreta may leak through this gap.

[0005] An object of the present invention is to provide a technique capable of suppressing the three-dimensional gathers from falling inward in the width direction.

Means for Solving the Problems

[0006] To solve the above problems, in the present invention, a free-end fixing portion is provided for fixing each of both longitudinal ends of a free-end side piece of a leak-proof sheet to a base-end side piece.

[0007] Specifically, the absorbent article according to the present invention is an absorbent article having a length along the longitudinal direction and a length along the width direction orthogonal to the longitudinal direction, and is provided at a position including the crotch portion and can absorb the excreted liquid of the wearer. It includes an absorber, a topsheet having a water-permeable region provided on the skin side of the absorber, and a pair of left and right leak-proof sheets extending in the longitudinal direction and arranged outside the center in the width direction. Leak The leak-proof sheet is an impermeable sheet disposed on the skin side of the topsheet, and includes a base-end side piece joined to the topsheet, a bent portion that bends from the base-end side piece toward the skin side and outward in the width direction, a free-end side piece extending outward in the width direction from the bent portion, a base-end fixing portion that fixes each of both longitudinal ends of the base-end side piece to the topsheet, a free-end fixing portion that fixes each of both longitudinal ends of the free-end side piece to the base-end side piece, and a plurality of elastic members adhesively attached to the free-end side piece in an extended state and extending in the longitudinal direction, the plurality of elastic members being arranged at intervals from each other in the width direction. The distance between the free-end fixing portions on both sides in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction, and among the plurality of elastic members, the elongation rate of the elastic member arranged on the outer side in the width direction is lower than the elongation rate of the elastic member arranged on the inner side in the width direction.

[0008] In the above absorbent article, among the plurality of elastic members, the elastic region of the elastic member arranged closest to the inner side in the width direction may be shorter than the elastic region of the elastic member arranged closest to the outer side in the width direction.

[0009] In the above absorbent article, among the plurality of elastic members, the elongation rate of the elastic member arranged closest to the inner side in the width direction is larger than the elongation rate of the elastic member arranged closest to the outer side in the width direction, and the elastic member arranged closest to the inner side in the width direction may be arranged to be in contact with the fold along the fold. Bending part along the fold Bending part

[0010] ​​The absorbent article described above may include an outer wrapper disposed on the non-skin side of the wearer with respect to the absorber, and a non-adhesive region in the crotch portion where the absorber and the outer wrapper are non-adhered, the non-adhesive region being provided at least at both end portions in the width direction.

[0011] In the absorbent article described above, the non-adhesive region may be provided in a region corresponding to the urethral orifice of the wearer in the crotch portion.

[0012] In the absorbent article described above, an adhesive portion that is disposed adjacent to the non-adhesive region in the width direction and that is an adhesive portion between the absorber and the outer wrapper may be provided, the adhesive portion being substantially parallel to the standing line on the skin side of the dew prevention sheet when viewed in plan.

[0013] In the absorbent article described above, the non-adhesive region is continuously provided from one end side to the other end side in the width direction, and is provided so as to be adjacent to at least one of the non-adhesive region and the longitudinal direction, and includes an adhesive portion for adhering the absorber and the outer wrapper, the adhesive portion being provided at the central portion in the width direction, and when viewed in plan, both end portions in the width direction are substantially parallel to the standing line on the skin side of the dew prevention sheet. Leak It may extend substantially parallel to the standing line on the skin side of the dew prevention sheet.

[0014] The absorbent article described above may be formed on the absorber including the crotch portion, and may include a groove provided substantially parallel to the standing line on the skin side of the dew prevention sheet. Leak It may include a groove provided substantially parallel to the standing line on the skin side of the dew prevention sheet.

[0015] In the absorbent article described above, the groove may be provided substantially parallel to each standing line on the skin side of a pair of left and right dew prevention sheets. Leak It may be provided substantially parallel to each standing line on the skin side of the dew prevention sheet.

[0016] In the absorbent article described above, the groove may be a squeezing groove.

Advantages of the Invention

[0017] According to the present invention, it is possible to suppress the three-dimensional gathers from falling inward in the width direction.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Modes for Carrying Out the Invention

[0019] <Embodiment> Hereinafter, a diaper according to an embodiment of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

[0020] FIG. 1 is an example of a perspective view of an adult-sized pant-type disposable diaper (hereinafter simply referred to as "diaper") according to an embodiment. In the diaper, the direction connecting the front body portion disposed facing the abdomen of the wearer and the back body portion disposed facing the back is defined as the longitudinal direction (also referred to as the front-rear direction). Between these front body portions (one side in the longitudinal direction) and the back body portions (the other side in the longitudinal direction) (the center in the longitudinal direction), there is a crotch portion disposed under the crotch of the wearer (disposed facing the groin). Further, in the state where the diaper is worn by the wearer, the side facing the wearer's skin is defined as the skin side, and the side opposite to the skin side is defined as the non-skin side. Furthermore, the direction connecting the skin side and the non-skin side is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction (also referred to as the left-right direction). In addition, viewing from the thickness direction is defined as a plan view. The diaper 1 has a length along the longitudinal direction and a length along the width direction orthogonal to the longitudinal direction, and is worn under the crotch of the wearer. Also, the terms related to the directions used in the present application mean the directions that coincide with the front, rear, left, and right of the wearer in the state where the diaper 1 is worn by the wearer. For example, when referring to the left-right direction in the present application, it means the direction that coincides with the left and right of the wearer in the state where the diaper 1 is worn by the wearer.

[0021] In the present embodiment, as an example of an absorbent article, a pant-type disposable diaper having a cylindrical structure with a waist opening through which the waist circumference of the wearer can be inserted and a pair of left and right leg openings through which each of the left and right lower limbs of the wearer can be inserted is exemplified. Also, in the present embodiment, an adult-sized pant-type disposable diaper is exemplified, but the "absorbent article" referred to in the present application is not limited to an adult-sized pant-type disposable diaper. The "absorbent article" referred to in the present application includes pant-type disposable diapers for children.

[0022] The diaper 1 has a crotch region 1B which is a part corresponding to the crotch region (inner thigh) of the wearer covering the crotch of the wearer in the worn state, a front body region 1F which is a part corresponding to the front body in the waist circumference of the wearer and covers the abdominal side of the wearer, and a back body region 1R which is a part corresponding to the back body in the waist circumference of the wearer and covers the back side of the wearer. Here, the front body region 1F is located on the front side of the crotch region 1B, and the back body region 1R is located on the back side of the crotch region 1B. Since the diaper 1 in the present embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the back body region 1R are joined to each other, and the right edge of the front body region 1F and the right edge of the back body region 1R are joined to each other. Therefore, a body opening 2T (waist circumference opening) is formed by the upper edges of the front body region 1F and the back body region 1R in the diaper 1. Further, a left lower limb opening 2L (leg circumference opening) is formed in the left part of the crotch region 1B where the above joining is not performed in the diaper 1, and a right lower limb opening 2R (leg circumference opening) is formed in the right part of the crotch region 1B. And when the diaper 1 is worn such that the left lower limb of the wearer is inserted through the left lower limb opening 2L, the right lower limb of the wearer is inserted through the right lower limb opening 2R, and the body of the wearer enters the body opening 2T, the front body region 1F is arranged on the abdominal side of the wearer, the back body region 1R is arranged on the back side of the wearer, and the left lower limb opening 2L and the right lower limb opening 2R are fixed to the body of the wearer in a state of surrounding the thighs of the wearer. Since the diaper 1 is fixed to the body of the wearer in such a form, the wearer can move freely while wearing the diaper 1.

[0023] An absorber that can absorb and hold liquid is mainly arranged around the crotch region 1B in the diaper 1. Further, in the diaper 1, the outflow of liquid In order to suppress the formation of gaps serving as paths, a three-dimensional gather 3BL is provided at the left lower limb opening 2L that surrounds the thigh of the wearer's left lower limb, and a three-dimensional gather (not shown) is provided at the right lower limb opening 2R that surrounds the thigh of the wearer's right lower limb. A waist gather 3R and a tummy gather 12 are provided at the part that surrounds the wearer's abdominal circumference. Also, leg gathers 3LF and 3LR (in FIG. 1, the leg gather 3LR is not shown) are provided at the position that surrounds the root of the wearer's legs. Note that the leg gather 3LF is provided in the front body region 1F, and the leg gather 3LR is provided in the back body region 1R. And in FIG. 1, only the leg gather 3LF is illustrated. The three-dimensional gathers 3BL and 3BR and the waist gather 3R adhere to the wearer's skin by contracting due to the elastic force of the elastic member. Also, the leg gathers 3LF and 3LR prevent a gap from being generated between the root of the wearer's legs and the diaper 1. Therefore, the discharge liquid discharged from the wearer's genital area is absorbed by the absorbent body of the diaper 1 with almost no leakage from the diaper 1.

[0024] Note that the diaper 1 can be used in combination with an inner pad (not shown). The inner pad is a substantially rectangular absorbent article provided with an absorbent body and absorbs the discharge liquid of the wearer. When using the diaper 1 and the inner pad in combination, the inner pad is placed on the skin side of the diaper 1 so as to contact the discharge hole of the wearer. The discharge liquid is first absorbed by the inner pad, and only the discharge liquid that could not be absorbed by the inner pad reaches the absorbent body of the diaper 1 and is further absorbed. For this reason, even when the amount of the discharge liquid is large, it is possible to prevent the discharge liquid from leaking from the diaper 1. Also, when the amount of the discharge liquid is small and can be completely absorbed by the inner pad, only the inner pad needs to be replaced even when the discharge liquid is discharged, so the assistance cost can be reduced. Also, the replacement frequency of the diaper 1 can be lowered, and the diaper 1 can be used for a long time.

[0025] FIG. 2 is an example of an exploded perspective view of the diaper 1 according to the embodiment. The diaper 1 has an outer cover sheet 4 and an inner cover sheet 5. The cover sheet 4 and the inner cover sheet 5 are sheets of a substantially hourglass shape (a gourd shape) that are bonded together to form the outer surface of the diaper 1, and are of the same shape and substantially the same size except for the ends on the front body region 1F side and the ends on the rear body region 1R side. In a state where the diaper is worn by the wearer, the cover sheet 4 is laminated on the non-skin side of the wearer, and the inner cover sheet 5 is laminated on the skin side of the wearer. Between the cover sheet 4 and the inner cover sheet 5, elastic members for forming the waist gathers 3R, the tummy gathers 12, and the leg gathers 3LF, 3LR are provided. In this embodiment, thread rubber is adopted as the elastic member. Note that, as the elastic member, an elastic member such as strip-shaped rubber can be appropriately selected instead of the thread rubber.

[0026] For example, in order to suppress leakage of excrement, the cover sheet 4 and the inner cover sheet 5 can use a non-woven fabric made of a liquid-impermeable thermoplastic resin as the material. Here, examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP). Hereinafter, the absorber 8 and the combination of the absorber 8 with the back sheet 6, the top sheet 9, and the side sheets 10L, 10R are referred to as an interior body, and as a concept corresponding to the interior body, the cover sheet 4 and the inner cover sheet 5 in which the thread rubber is arranged may be collectively referred to as an exterior body (an example of the "exterior body" in the present disclosure).

[0027] The diaper 1 has a backsheet 6, an absorber 8, and a topsheet 9, which are laminated in this order on the wearer-side surface of the cover sheet 4 and the inner cover sheet 5. The backsheet 6 has a length in the longitudinal direction that reaches from the front body of the wearer via the crotch to the back body, and is a substantially rectangular sheet having a predetermined lateral width in the width direction orthogonal to the longitudinal direction. Both the absorber 8 and the topsheet 9 are sheet-like members having a substantially rectangular appearance similar to that of the backsheet 6, and are laminated on the backsheet 6 in order with the longitudinal direction being the same as the longitudinal direction of the backsheet 6. The backsheet 6 is a sheet formed of a liquid-impermeable thermoplastic resin in order to suppress leakage of excretions. Further, minute pores 66 are provided in the backsheet 6. The pores 66 are air-permeable while preventing liquid permeation. The pores 66 are provided, for example, in a region overlapping the absorber 8. Further, the topsheet 9 is a sheet-like member disposed on the skin side of the wearer so as to cover the water-absorbing surface of the absorber 8. This topsheet 9 has liquid permeability in part or in whole. Therefore, in a state where the diaper 1 is worn, the liquid discharged from the wearer penetrates through the topsheet 9 that can come into contact with the skin of the wearer and enters the absorber 8, where it is absorbed. Examples of the liquid-permeable sheet include a woven fabric, a nonwoven fabric, and a porous film. Further, the topsheet 9 may have hydrophilicity.

[0028] The absorber 8 has an absorption core 8c composed of one or more mats and a core wrap sheet 7 (water-permeable sheet) that wraps around the absorption core 8c. In this embodiment, as shown in FIG. 2, the absorption core 8c has an upper absorption mat 8a and a lower absorption mat 8b. The upper absorption mat 8a is substantially hourglass-shaped with a constricted portion, and the lower absorption mat 8b is rectangular. Also, the width of the lower absorption mat 8b is substantially the same as the width of the constricted portion of the upper absorption mat 8a. The absorption core holds a granular absorbent resin (polymeric absorbent material) such as a superabsorbent polymer (SAP) that has a crosslinked structure capable of absorbing and retaining water in the gaps between short fibers of cellulose-based fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. When the absorption core 8c absorbs the liquid discharged from the wearer, it swells the absorbent resin held in the gaps within the short fibers and retains the liquid within the short fibers. In this embodiment, the upper absorption mat 8a is substantially hourglass-shaped with a constriction near the central portion. The absorption core 8c can adopt an appropriate shape according to the purpose. Examples of the shape of the absorption core 8c include a rectangular shape, an elliptical shape, and various other shapes.

[0029] The core wrap sheet 7 is a thin liquid-permeable sheet. By wrapping the absorbent core 8c with the core wrap sheet 7, it becomes difficult for the SAP of the absorbent core 8c described above to mix into other structures. Also, the collapse of the absorbent core 8c is suppressed. The core wrap sheet 7 can be formed of pulp fibers, and for example, tissue paper can be used. The core wrap sheet 7 may be a single sheet, but it may also be composed of two sheets, an upper sheet disposed on the wearer's skin side and a lower sheet disposed on the non-skin side of the wearer, which wraps around the side surface and the skin side of the absorbent core. When the core wrap sheet 7 is composed of two sheets, the widthwise end portions of the upper sheet may be structured to be wrapped by other sheets (for example, the side sheets 10L and 10R, the back sheet 6, and the top sheet 9 described later). Note that the absorber 8 is wrapped by the back sheet 6 and the top sheet 9, and the collapse can also be suppressed by these sheets, so the core wrap sheet 7 can be omitted.

[0030] The back sheet 6, the absorber 8, and the top sheet 9 all extend from the front crotch region 1F to the rear crotch region 1R. Therefore, when the back sheet 6, the absorber 8, and the top sheet 9 are laminated to cover the wearer's crotch (groin), both longitudinal ends of the back sheet 6, the absorber 8, and the top sheet 9 are in a state of being located on the ventral and dorsal sides of the wearer. That is, the wearer's crotch is in a state of being covered by the absorber 8 from the ventral side to the dorsal side of the wearer. Therefore, no matter whether the wearer is in a posture with the abdomen facing down or a posture with the back facing down, when the liquid is discharged outside the body, the discharged liquid will contact the absorber 8 through the top sheet 9.

[0031] Further, between the backsheet 6 and the core wrap sheet 7, a thread rubber 4F7 is provided in an extended state in the longitudinal direction from the front body region 1F to the crotch region 1B at the center in the width direction. The thread rubber 4F7 is adhered to the backsheet 6 and is adhered to the inner cover sheet 5 and the cover sheet 4 via the backsheet 6. The thread rubber 4F7 exerts a force to contract the inner cover sheet 5 and the cover sheet 4 in the longitudinal direction. Note that the region where the thread rubber 4F7 is provided is preferably a region where the absorber 8 and the inner cover sheet 5 are non-adhered, but it may also be a region where the absorber 8 and the inner cover sheet 5 are adhered. Note that the thread rubber 4F7 may be provided between the cover sheet 4 and the inner cover sheet 5. Preferably, it may also be a region where the absorber 8 and the inner cover sheet 5 are adhered. Note that the thread rubber 4F7 may be provided between the cover sheet 4 and the inner cover sheet 5.

[0032] Also, a thread rubber cover sheet 13 (elastic member cover sheet) is disposed on the skin side of the thread rubber 4F7. The thread rubber cover sheet 13 covers the thread rubber 4F7 from the skin side and is adhered to the backsheet 6. The thread rubber cover sheet 13 is disposed between the thread rubber 4F7 and the absorber 8. Also, the thread rubber cover sheet 13 is not adhered to the core wrap sheet 7 of the absorber 8. The thread rubber 4F7 is disposed between the absorber 8 and the backsheet 6, adhered to the backsheet 6, and non-adhered to the absorber 8. Thereby, it is possible to prevent the elastic force (contracting force) of the thread rubber 4F7 from acting on the absorber 8 and prevent the absorber 8 from being deformed. Note that when a belt-shaped elastic member is used instead of the thread rubber 4F7, the thread rubber cover sheet 13 may not be provided and the elastic member and the core wrap sheet 7 may be non-adhered. Also, in the present embodiment, the thread rubber cover sheet 13 is formed to have the same length as the backsheet 6. Note that the thread rubber cover sheet 13 may be formed to have a length corresponding to the extending region of the thread rubber 4F7, or may be formed to be longer than the extending region of the thread rubber 4F7 and shorter than the backsheet 6.

[0033] The diaper 1 also has elongated strip-shaped side sheets 10L and 10R for forming the three-dimensional gathers 3BL and 3BR described above. The side sheets 10L and 10R are provided at the long-side portions of the top sheet 9. And three thread rubbers 10L1 and 10R1 (an example of the "plurality of elastic members" in the present disclosure) are adhered to the side sheets 10L and 10R in a state of being extended along the longitudinal direction. Therefore, when the edge 4F4 that is the left edge of the front body region 1F of the cover sheet 4 and the edge 4R4 that is the left edge of the rear body region 1R are joined to each other, and the edge 4F5 that is the right edge of the front body region 1F of the cover sheet 4 and the edge 4R5 that is the right edge of the rear body region 1R are joined to each other, when the diaper 1 in the completed state as shown in FIG. 1 is formed, the side sheets 10L and 10R are pulled in the longitudinal direction by the contraction force of the thread rubbers 10L1 and 10R1 and rise from the top sheet 9 along the folding lines 10L2 and 10R2. As a result, three-dimensional gathers 3BL and 3BR are formed to prevent the outflow of liquid from the left leg opening 2L and the right leg opening 2R.

[0034] Here, the side sheets 10L and 10R are provided such that the widthwise interval between the standing lines of the three-dimensional gathers 3BL and 3BR when the three-dimensional gathers 3BL and 3BR are formed is such that the inner pad can enter. The joining methods of the edges 4F4 and 4R4, and the edges 4F5 and 4R5 are not particularly limited, and for example, they can be performed by heat sealing, high-frequency sealing, ultrasonic sealing, or the like.

[0035] Furthermore, the diaper 1 includes an end sheet 11F laminated on the wearer-side surface in the front body region 1F of the cover sheet 4, sandwiching the back sheet 6, the absorber 8, the top sheet 9, and the side sheets 10L and 10R, and an end sheet 11R laminated on the wearer-side surface in the back body region 1R of the cover sheet 4. The end sheets 11F and 11R are strip-shaped sheets that are overlaid on the cover sheet 4 and the inner cover sheet 5 at one end side in the longitudinal direction of the top sheet 9. The end sheets 11F and 11R are non-water-permeable nonwoven fabrics, and mainly reinforce the cover sheet 4 and the inner cover sheet 5 at the body-circumference contact portion of the diaper 1. Also, adhesives are applied to the end sheets 11F and 11R respectively, and they are adhered to the inner cover sheet 5 by the adhesives. The end sheets 11F and 11R are disposed on the skin-side of the laminate formed by the back sheet 6, the absorber 8, the top sheet 9, and the side sheets 10L and 10R, and prevent the edge of the laminate from directly touching the skin and giving the wearer a sense of discomfort.

[0036] FIG. 3 is an example of a view schematically showing the deployed and extended state of the diaper 1 according to the embodiment. FIG. 3(A) schematically shows the internal structure when the deployed and extended diaper 1 is viewed from the left side. FIG. 3(B) schematically shows a plan view of the deployed and extended diaper 1.

[0037] As shown in FIG. 3, the thread rubber 4F3 forming the leg gather 3LF is provided along the edges on the front body region 1F side of the right lower limb opening 2R and the left lower limb opening 2L into which the wearer's legs enter when the diaper 1 is assembled. The thread rubber 4F3 is adhesively bonded to the cover sheet 4 and the inner cover sheet 5 in an extended state. And the thread rubber 4F3 is provided so as to cross in the left-right direction in the crotch region 1B on the front body side. At the location where the thread rubber 4F3 is provided so as to cross in the left-right direction like this, the thread rubber 4F3 and the absorber 8 overlap in the thickness direction of the diaper 1. Also, the central portion in the width direction of such a transverse region becomes a region corresponding to the urethral orifice of the wearer when the diaper 1 is worn. Note that, in the region where the absorber 8 overlaps in the thickness direction, the arrangement form of the thread rubber 4F3 is not limited to crossing as shown in FIG. 3. It is sufficient that the extending direction of the thread rubber 4F3 has a component in the width direction, and preferably, the width direction component of the extending direction of the thread rubber 4F3 is larger than the longitudinal direction component.

[0038] On the other hand, the thread rubber 4R3 forming the leg gather 3LR is provided along the edges on the back body region 1R side of the right lower limb opening 2R and the left lower limb opening 2L. The thread rubber 4R3 is adhesively bonded to the cover sheet 4 and the inner cover sheet 5 in an extended state. And in the crotch region 1B on the back body side, the tip of the thread rubber 4R3 faces the width direction. However, the thread rubber 4R3 is cut at the central portion in the width direction, and the left thread rubber 4R3 and the right thread rubber 4R3 are not connected.

[0039] Also, the inner cover sheet 5 and the absorber 8 are appropriately adhesively bonded with an adhesive via the back sheet 6 from the front body region 1F to the back body region 1R. However, in the region where the thread rubber 4F3 crosses in the front body region 1F as shown in FIG. 3, the inner cover sheet 5 and the absorber 8 are non-adhesively bonded (referred to as the non-adhesive region 15). Actually, in the non-adhesive region 15, the inner cover sheet 5 and the back sheet 6 are non-adhesively bonded. In the present embodiment, the non-adhesive region 15 is provided over the entire overlapping region of the crotch region 1B where the thread rubber 4F3 and the absorber 8 overlap.

[0040] Also, as shown in FIG. 3, the thread rubber 4F7 is provided at the center in the width direction between the back sheet 6 and the core wrap sheet 7 in a state of being elongated in the longitudinal direction from the front body region 1F to the crotch region 1B. Actually, the thread rubber 4F7 is provided between the back sheet 6 and a thread rubber cover sheet 13 (not shown in FIG. 3). Note that the side of the crotch region 1B closer to the wearer corresponds to the anus of the wearer when the wearer wears the diaper 1. Further, the absorber 8 is linearly compressed so as to surround the thread rubber 4F7 and is indicated as line 14 in FIG. 3. Line 14 is provided in the width direction at the end on the crotch region 1B side. Also, line 14 is bent outward in the width direction at the end on the front body region 1F side. Note that such compression of the absorber 8 is realized, for example, by embossing with a roller.

[0041] One end side of the cover sheet 4 is folded back at the folding lines 4FF and 4RF shown in FIG. 2. The above-described waist gather 3R is formed by adhering a thread rubber (filamentous rubber) 4F1 in an extended state to the front body region 1F of the cover sheet 4 and adhering a thread rubber (filamentous rubber) 4R1 in an extended state to the back body region 1R of the cover sheet 4. The thread rubbers 4F1 and 4F2 are provided in order from the folding line 4FF side along the folding line 4FF that forms the upper edge of the front body region 1F when folded back. Similarly, the tummy gather 12 is formed by adhering a thread rubber 4F2 in an extended state to the front body region 1F of the cover sheet 4 and adhering a thread rubber 4R2 in an extended state to the back body region 1R of the cover sheet 4. The thread rubbers 4R1 and 4R2 are also provided in order from the folding line 4RF side along the folding line 4RF that forms the upper edge of the back body region 1R when folded back, similar to the thread rubbers 4F1 and 4F2.

[0042] Therefore, the thread rubbers 4F1 and 4F2 are provided on the cover sheet 4 in such a way that the longitudinal direction, which is the stretching direction, is in the left - right direction of the diaper 1. Also, the thread rubbers 4R1 and 4R2 are provided on the cover sheet 4 in such a way that the longitudinal direction, which is the stretching direction, is in the left - right direction of the diaper 1. Thus, when the edge 4F4 and the edge 4R4 are joined to each other and the edge 4F5 and the edge 4R5 are joined to each other, the thread rubbers 4F1, 4F2 and the thread rubbers 4R1, 4R2 form a substantially annular elastic member that circulates along the body opening 2T and exhibits the function of contracting the body opening 2T in the circumferential direction of the body. That is, the thread rubbers 4F1, 4F2 and the thread rubbers 4R1, 4R2 exert a contracting force to make the diaper 1 adhere to the wearer and prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference. The thread rubbers 4F2 and 4R2 overlap the absorber 8 in a part of their crotch region 1B side.

[0043] The thread rubbers 4F1 and 4R1 are provided so as to extend in the left - right direction along the upper - edge portions of the front - body region 1F and the back - body region 1R shown in FIG. 1. The thread rubbers 4F2 and 4R2 are provided in parallel with a predetermined interval therebetween. The thread rubbers 4F1 and 4R1, when the diaper 1 is worn, tightly fasten the wearer's abdominal circumference relatively strongly above the thread rubbers 4F2 and 4R2. The thread rubbers 4F1 and 4R1 are responsible for the function of preventing the diaper 1 from shifting in the wearing position and adhering to the wearer, and preventing the leakage of the discharged liquid from the abdomen and the back. The thread rubbers 4F2 and 4R2 relieve the sense of pressure on the wearer caused by the contracting force of the thread rubbers 4F1 and 4R1.

[0044] The cover sheet 4 is folded back along the folding lines 4FF and 4RF and extends to the arrangement regions of the thread rubbers 4F1 and 4R1, and reinforces the arrangement regions of the thread rubbers 4F1 and 4R1 at the folded - back portions. The end sheets 11F and 11R (see FIG. 2) are provided in the arrangement regions of the thread rubbers 4F2 and 4R2 where the cover sheet 4 folded back along the folding lines 4FF and 4RF does not extend, and reinforce the arrangement regions of the thread rubbers 4F2 and 4R2.

[0045] In the present application, the state where the sheets overlap is not limited to the form where the overlapping sheets are in contact with each other entirely, but is a concept including the form where a part of the sheets overlap. For example, the end sheet 11F is overlapped in a state where a part of one end side in the longitudinal direction of the back sheet 6 touches a part of the cover sheet 4. The diaper 1 has, in addition to the back sheet 6 and the top sheet 9 sandwiching the absorber 8, a laminate formed by stacking the cover sheet 4, the end sheets 11F, 11R, the inner cover sheet 5, and the side sheets 10L, 10R. Thus, it can be said that the diaper 1 has a laminate in which these multiple sheets are stacked.

[0046] Next, with reference to FIGS. 4 to 6, the side sheets 10L, 10R (an example of the "anti-leakage sheet" in the present disclosure) will be described in more detail. FIG. 4 is a diagram schematically showing a cross-sectional structure when cut along line AA in FIG. 3. Leak The side sheets 10L, 10R are non-water-permeable non-woven sheets arranged on both sides in the width direction of the absorber 8, and are a pair of left and right sheets covering the side surfaces in the width direction of the absorber 8. The side sheets 10L, 10R further rise upward on the skin side at the end on the skin side of the absorber 8 to form three-dimensional gathers 3BL, 3BR for preventing lateral leakage of excreta. On the skin side of the absorber 8, the side sheets 10L, 10R are laminated closer to the skin side than the top sheet 9.

[0047] The side sheets 10L, 10R for forming the three-dimensional gathers 3BL, 3BR have the width of the diaper 1

[0048] It is disposed outside the center of the direction and on the skin side relative to the topsheet 9. A hot melt adhesive is applied between the topsheet 9 and the side sheets 10L and 10R so as to extend along the longitudinal direction of the diaper 1. The non-permeable parts 31L and 31R are formed by the non-permeable hot melt adhesive. The non-permeable parts 31L and 31R suppress the entry of the discharged liquid between the side sheets 10L and 10R and the topsheet 9, thereby suppressing the leakage of the liquid from the widthwise ends of the diaper 1. The non-permeable parts 31L and 31R are formed from the front waist region to the back waist region so as to extend in the longitudinal direction of the diaper 1. Thereby, the diaper 1 can suppress lateral leakage from any position at the widthwise ends. Also, the side sheets 10L and 10R cover the widthwise ends of the topsheet 9 and the backsheet 6. Thereby, even if the liquid penetrates to the widthwise end side relative to the non-permeable parts 31L and 31R, the diaper 1 can suppress lateral leakage.

[0049] Also, the three-dimensional gathers 3BL and 3BR rise on the skin side with the folding lines 10L2 and 10R2 (see FIG. 4) formed at positions overlapping the topsheet 9 as boundaries. The folding lines 10L2 and 10R2 are formed inside the width direction of the diaper 1 rather than the non-permeable parts 31L and 31R along the inner widthwise ends of the non-permeable parts 31L and 31R. In other words, the non-permeable parts 31L and 31R are provided outside the width direction of the diaper 1 rather than the folding lines 10L2 and 10R2. Since the non-permeable parts 31L and 31R are formed of a hot melt adhesive, the formation regions of these non-permeable parts become harder than the case where the non-permeable parts are not provided. In the diaper 1 according to the present embodiment, since the side sheets 10L and 10R are disposed on the skin side relative to the non-permeable parts 31L and 31R, these non-permeable parts do not directly touch the skin of the wearer, and it is possible to prevent the non-permeable parts from touching the skin and giving the wearer a sense of discomfort.

[0050] In addition, as shown in FIG. 4, when the side sheets 10L and 10R are folded toward the top sheet 9, the side sheets 10L and 10R include base end side pieces 3BL1 and 3BR1 that extend inward in the width direction of the diaper 1 and include folding lines 10L2 and 10R2, bending portions 3BL2 and 3BR2, and free end side pieces 3BL3 and 3BR3 that are bent outward in the width direction of the diaper 1 from the base end side pieces 3BL1 and 3BR1 by the bending portions 3BL2 and 3BR2 and extend outward in the width direction, and free ends 3BL4 and 3BR4 provided at the tips of the free end side pieces 3BL3 and 3BR3. The base end side pieces 3BL1 and 3BR1, the bending portions 3BL2 and 3BR2, the free end side pieces 3BL3 and 3BR3, and the free ends 3BL4 and 3BR4 are provided across the front body region 1F to the back body region 1R.

[0051] A plurality of thread rubbers 10L1 and 10R1 that are adhesively attached to the free end side pieces 3BL and 3BR of the side sheets 10L and 10R in an extended state and extend in the longitudinal direction of the diaper 1 are provided. The plurality of thread rubbers 10L1 and 10R1 are arranged at intervals from each other in the width direction of the diaper 1. The side sheets 10L and 10R form three-dimensional gathers 3BL and 3BR by rising on the skin surface side with the folding lines 10L2 and 10R2 as a boundary due to the expansion and contraction force of the thread rubbers 10L1 and 10R1. The folding lines 10L2 and 10R2 serve as rising lines when the three-dimensional gathers 3BL and 3BR rise. The side sheets 10L and 10R are in contact with the wearer's skin from the bending portions 3BL2 and 3BR2 to the free ends 3BL4 and 3BR4. Among the side sheets 10L and 10R, the base end side pieces 3BL1 and 3BR1, the bending portions 3BL2 and 3BR2, the free end side pieces 3BL3 and 3BR3, the free ends 3BL4 and 3BR4, and the thread rubbers 10L1 and 10R1 constitute the three-dimensional gathers 3BL and 3BR.

[0052] FIG. 5 is a plan view showing the diaper 1 according to the present embodiment, with the backsheet 6, the absorbent core 8c, the topsheet 9, and the side sheets 10L and 10R removed. FIG. 6 is a cross-sectional view of a cross-section including the topsheet 9 and the side sheet 10L when cut along the line BB in FIG. 5. The free-end fixing portions of the three-dimensional gathers 3BL and 3BR provided at the longitudinal ends of the diaper 1 will be described with reference to FIG. 5 and using FIG. 6. Hereinafter, the free end The fixing portion will be described, but since the free-end fixing portion of the side sheet 10R is the same, the description thereof will be omitted.

[0053] The diaper 1 includes, at the longitudinal end, a base-end adhesion portion 35 (an example of the "base-end fixing portion" in the present disclosure) that adheres the base-end side piece 3BL1 and the topsheet 9, and a free-end adhesion portion 36 (an example of the "free-end fixing portion" in the present disclosure) that adheres the free-end side piece 3BL3 and the base-end side piece 3BL1. The side sheet 10L is fixed to the topsheet 9 by the base-end adhesion portion 35 at each longitudinal end of the diaper 1 in order to stand up on the skin side except at the longitudinal ends. The three-dimensional gather 3BL stands up on the skin side with the folding line 10L2 shown in FIG. 4 as a boundary in a region where the base-end adhesion portion 35 is not formed. The base-end adhesion portion 35 constitutes the longitudinal end side of the water-impermeable portions 31L and 31R. The base-end adhesion portion 35 is formed wider than the water-impermeable portions 31L and 31R on the longitudinal center side of the base-end adhesion portion 35.

[0054] Further, the free-end adhesion portion 36 is provided at each longitudinal end of the diaper 1. Here, the distance between the free-end adhesion portions 36 on both sides (front and back) in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction. In FIG. 5, the distance on the outer side in the width direction is indicated by D1, and the distance on the inner side in the width direction is indicated by D2. Hereinafter, the distance D1 will be referred to as the "outer distance D1", and the distance D2 will be referred to as the "inner distance D2".

[0055] Since the outer side in the width direction of the free end connecting portion 36 is formed shorter on the central side in the longitudinal direction than the inner side in the width direction, the outer distance D1 is longer than the inner distance D2. As a result, on the side sheet 10L, the free end portion 3BL4 which is on the outer side in the width direction is more likely to stand up on the skin surface side in the longitudinal direction of the diaper 1. Thereby, the diaper according to the present embodiment can easily stand up the free end portion 3BL4 of the three-dimensional gather 3BL.

[0056] Also, among the three thread rubbers 10L1, the elongation rate of the thread rubber 10L1 arranged on the outer side in the width direction of the diaper 1 is lower than the elongation rate of the thread rubber 10L1 arranged on the inner side in the width direction of the diaper 1. Here, the elongation rate means the draft rate. The draft rate (%) of the thread rubber is expressed as a percentage by dividing the length (cut length) when the thread rubber is incorporated into the diaper by the natural length of the thread rubber. The thread rubber 10L1 is incorporated into the diaper 1 in an extended state in order to exhibit a contraction force. Therefore, the draft rate becomes a value larger than 100%. The diaper 1 according to the present embodiment makes the elongation rate of the thread rubber 10L1 arranged on the outer side in the width direction lower than the elongation rate of the thread rubber 10L1 arranged on the inner side in the width direction, thereby contracting the inner region more than the outer region within the side sheet 10L, and preventing the outer region from falling inward in the width direction compared to the inner region, that is, preventing the free end portion 3BL4 of the three-dimensional gather 3BL from falling toward the top sheet 9 side.

[0057] In this way, the diaper according to the present embodiment makes the outer distance D1 longer than the inner distance D2, and makes the elongation rate of the thread rubber 10L1 arranged on the outer side in the width direction lower than the elongation rate of the thread rubber 10L1 arranged on the inner side in the width direction, thereby making it easier to stand up the free end portion 3BL4 side. As a result, the three-dimensional gather 3BL can be stood up so that the portion from the 3BL2 side to the free end portion 3BL4 side of the free end side piece 3BL3 contacts the skin of the wearer. Bending part 3BL2 side to the free end 3BL4 side can contact the skin of the wearer, the three-dimensional gather 3BL can be stood up.

[0058] The base end adhesive portion 35 and the free end adhesive portion 36 are formed by applying a hot melt adhesive. Although the base end adhesive portion 35 is not shown in Fig. 5, the longitudinal extension range of the base end adhesive portion 35 is generally the same as the longitudinal extension range of the free end adhesive portion 36 on the inner side in the width direction.

[0059] <Adhesion form 1> Next, referring to Figs. 7 to 10, the bonding form between the absorbent body 8 and the exterior body in this embodiment will be described. First, adhesion mode 1 will be described with reference to FIG. 7. FIG. 7 is a plan view of the diaper 1 as viewed from the skin-facing side. As shown in FIG. 7, a non-adhesive region 15 is provided in the crotch region 1B, where the absorber 8 and the inner coversheet 5 are not adhered to each other. The non-adhesive region 15 is provided continuously from one end to the other end in the width direction of the diaper 1. On the front body region 1F side of the non-adhesive region 15, an adhesive region 16 is provided, where the absorber 8 and the inner coversheet 5 are adhered to each other, and on the back body region 1R side of the non-adhesive region 15, an adhesive region 17 is provided, where the absorber 8 and the inner coversheet 5 are adhered to each other. In FIG. 7, the adhesive regions 16 and 17 are shown as solid and are not shown in detail. However, the adhesive regions 16 and 17 are formed by stripe-shaped adhesive portions extending in the width direction.

[0060] The non-adhesive region 15 includes a region corresponding to the wearer's urethral opening (hereinafter referred to as the "urethral opening-corresponding region"). The urethral opening-corresponding region is the region where the wearer's urethral opening is located when the diaper 1 is worn. As shown in FIG. 7 , elastic threads 4F3 run across the non-adhesive region 15. The contractile force of the elastic threads 4F3 lifts the cover sheet 4 and inner cover sheet 5 toward the skin side of the diaper 1. Generally, the absorbent core in the crotch region becomes heavy as it absorbs urine and tends to move away from the wearer's skin. This movement of the absorbent core away from the skin side can potentially cause the three-dimensional gathers to separate from the skin side. In contrast, the diaper 1 according to this embodiment uses the elastic threads 4F3 to lift the absorbent core 8 in the crotch region 1B toward the skin side, thereby preventing the absorbent core 8 and the three-dimensional gathers from separating from the skin side.

[0061] <Next bonding form 2> Next, bonding form 2 will be described with reference to FIG. 8. FIG. 8 is a plan view of the diaper 1 as seen from the skin side. As shown in FIG. 8, bonding regions 18L and 18R are provided adjacent to each other in the width direction of the non-bonding region 15. In FIG. 8, the bonding regions 18L and 18R are shown filled in. The bonding regions 18L and 18R are regions where the absorber 8 and the outer package are bonded, and in a plan view, they extend substantially parallel to the folding lines 10L2 and 10R2 that become the standing lines of the side sheets 10L and 10R shown in FIG. 5. Note that substantially parallel includes both perfect parallel and those slightly deviated from parallel. In bonding form 2, the bonding regions 18L and 18R become highly rigid, and the absorber 8 is easily bent along the bonding regions 18L and 18R so that the cross section in the width direction becomes a W shape.

[0062] <Bonding form 3> Next, bonding form 1 will be described with reference to FIG. 9. FIG. 7 is a plan view of the diaper 1 as seen from the skin side. As shown in FIG. 7, in the crotch region 1B, a non-bonding region 15 where the absorber 8 and the inner cover sheet 5 are non-bonded is provided. The non-bonding region 15 is continuously provided from one end side to the other end side in the width direction of the diaper 1. On the back waist region 1R side of the non-bonding region 15, a bonding region 19 where the absorber 8 and the inner cover sheet 5 are bonded is provided. The bonding region 19 is provided at the central portion in the width direction, and in a plan view, both end portions in the width direction extend substantially parallel to the folding lines 10L2 and 10R2 that become the standing lines of the side sheets 10L and 10R. In bonding form 3, the bonding region 19 becomes highly rigid, and the absorber 8 is easily bent along each end portion in the width direction of the bonding region 19 so that the cross section in the width direction becomes a W shape. Note that the bonding region 19 may be provided on the front waist region 1F side of the non-bonding region 15.

[0063] In any of the adhesion forms 1 to 3, the non-adhesive region is provided at least at both ends in the width direction. As a result, the end side in the width direction of the absorber 8 can be bent toward the skin surface side. In the diaper 1 according to the present embodiment, when the end side in the width direction of the absorber 8 is bent toward the skin surface side, the absorber 8 can be easily lifted toward the skin surface side by the thread rubber 4F3. Each of the adhesive regions in the adhesion forms 1 to 3 is a region where the inner cover sheet 5 and the back sheet 6 are adhered by a hot melt adhesive. Each adhesive region is where the absorber 8 is adhered to the inner cover sheet 5 via the back sheet 6.

[0064] Next, the line 14 formed in the absorber 8 will be described with reference to FIG. 10. FIG. 10 is a plan view showing the extraction of the absorber 8 from the diaper 1, a part of the thread rubbers 4F3 and 4R3, and the thread rubber 4F7. In FIG. 10, although the above-described adhesion form 1 is illustrated, any of the adhesion forms 1 to 3 may be used.

[0065] As shown in FIG. 10, the line 14 has five grooves. The five grooves are composed of grooves 14AL, 14AR, grooves 14BL, 14BR (an example of the "groove" in the present disclosure), and groove 14C. The grooves 14AL, 14AR are formed in the absorber 8 and are a pair of left and right grooves extending from the center in the width direction of the diaper 1 toward the end in the direction of the front body region 1F from the crotch region 1B in the region corresponding to the groin of the wearer. The grooves 14AL, 14AR are squeezing grooves formed by squeezing the absorber 8. Note that the grooves 14AL, 14AR may be formed by squeezing only the absorbent core 8c, or may be formed by squeezing the absorber 8 including the core wrap sheet 7. In the present embodiment, the grooves 14AL, 14AR are formed by squeezing the core wrap sheet 7 and the absorbent core 8c from the skin surface side. The absorber 8 bends along the groin of the wearer due to the formation of the grooves 14AL, 14AR.

[0066] In addition, when the regions where the grooves 14AL and 14AR are provided are viewed in plan view, a non-adhesive region 15 is formed that includes the region where the grooves 14AL and 14AR overlap, and the absorber 8 and the inner cover sheet 5 are non-adhesive. In FIG. 4, the non-adhesive region 15 is shown filled in. If the non-adhesive region 15 is not formed including the region where the grooves 14AL and 14AR overlap and the absorber 8 and the inner cover sheet 5 are adhered in that region, the outer package is expanded and pressed against the skin side. As a result, the state of the outer package is transmitted to the absorber 8, and a force acts on the absorber to approach a flat state from the state of being bent along the groin. On the other hand, the diaper 1 according to the present embodiment can be configured as described above to press the absorber 8 in the state of being bent along the groin against the skin surface side while maintaining the bent state. Thereby, the diaper 1 can improve the adhesion of the absorber 8 to the skin of the wearer.

[0067] Also, when the diaper 1 is viewed in plan view as shown in FIG. 10, the diaper 1 includes a thread rubber 4F3 that is adhesively bonded to the inner cover sheet 5 and the cover sheet 4 in an extended state in a region overlapping the non-adhesive region 15. As shown in FIG. 3, the ends of the thread rubber 4F3 are arranged at the end portions in the width direction of the left lower limb opening 2L and the right lower limb opening 2R. When the legs are inserted through the left and right lower limb openings 2L and 2R provided in the outer package, the outer package is pulled in the outer direction in the width direction, and the thread rubber 4F3 is also pulled in the outer direction in the width direction. As a result, in the region crossing the crotch region 1B where the thread rubber 4F3 extends in the width direction, the outer package is pushed upward on the skin side, but in this region, a non-adhesive region 15 where the absorber 8 and the outer package are non-adhesive is provided. For this reason, the absorber 8 is pushed upward so as to approach the skin side by the outer package while maintaining a state of being bent along the groin. In the present embodiment, the thread rubber 4F3 for forming the leg gathers extends in the non-adhesive region 15 and is connected on the left and right. However, a thread rubber provided in the non-adhesive region 15 and crossing the crotch region 1B and the thread rubber for forming the leg gathers may be provided separately. Further, the ends of the thread rubber 4F3 may be adhered to the outer package, and in the non-adhesive region 15 which is the central portion in the width direction, the thread rubber may be adhered to another sheet material disposed between the outer package and the back sheet. Even with such a configuration, the diaper 1 can obtain the above-described effects as long as the back sheet and another sheet material are non-adhesive in the non-adhesive region 15.

[0068] Next, the grooves 14BL and 14BR will be described. The grooves 14BL and 14BR are formed in the absorber 8 and are a pair of left and right grooves extending along the longitudinal direction in a region corresponding to the urethral orifice of the wearer. These are grooves. Grooves 14BL and 14BR are squeezing grooves formed by squeezing absorber 8. Note that grooves 14BL and 14BR may be formed by squeezing only absorbent core 8c, or may be formed by squeezing absorber 8 including core wrap sheet 7. In the present embodiment, grooves 14BL and 14BR are formed by squeezing core wrap sheet 7 and absorbent core 8c from the skin side. Absorber 8 is in a state where the absorber 8 between the grooves is raised toward the urethral orifice side due to the formation of grooves 14BL and 14BR. Thereby, since diaper 1 can press absorber 8 against the urethral orifice, the adhesion of absorber 8 to the wearer's skin can be improved.

[0069] Also, the thread rubber 4F3 is arranged to include a region that overlaps with the front region on the 1F side of the grooves 14BL and 14BR when viewed in a plan view. With this configuration, the effect of pressing the absorber 8 against the skin side of the wearer in a bent state by the thread rubber 4F3 is enhanced. This is because, by providing the non-adhesive region 15 in the overlapping region between the thread rubber 4F3 and the absorber 8, the absorber 8 is not deformed by the contraction of the thread rubber 4F3, but the absorber 8 having a bent shape due to the grooves 14BL and 14BR can be pressed against the skin side. Also, in order to achieve this effect, it is preferable that the thread rubber 4F3 is pulled in the left-right direction in a state where the legs are inserted through the left and right lower limb openings 2L and 2R, thereby pressing the absorber 8 against the skin. For this reason, the thread rubber 4F3 is preferably a thread rubber for forming leg gathers whose end portion is arranged at the end portion in the width direction of the diaper 1. Also, when viewed in the thickness direction, when the thread rubber 4F3 for forming leg gathers overlaps with the grooves 14AL and 14AR, it is suitable for pressing the absorber 8 bent along the groin against the skin side of the wearer by the contraction force of the thread rubber 4F3. Also, when viewed in the thickness direction, when the thread rubber 4F3 for forming leg gathers overlaps with the grooves 14BL and 14BR, it is suitable for pressing the absorber 8 against the urethral orifice, or for pressing the inner pad (urine pad) arranged on the topsheet 9 against the urethral orifice. Note that the diaper 1 may be configured such that the thread rubber 4F3 overlaps with the grooves 14AL and 14AR and does not overlap with the grooves 14BL and 14BR, thereby being suitable for pressing the absorber 8 bent along the groin against the skin side of the wearer by the contraction force of the thread rubber 4F3. Also, the diaper 1 may be configured such that the thread rubber 4F3 does not overlap with the grooves 14AL and 14AR and the thread rubber 4F3 overlaps with the grooves 14BL and BR, thereby being suitable for pressing the absorber 8 against the urethral orifice, or for pressing the inner pad (urine pad) arranged on the topsheet 9 against the urethral orifice when the thread rubber 4F3 for forming leg gathers overlaps with the grooves 14BL and 14BR. Also, as in this embodiment, the diaper 1 may of course adopt both of the above two suitable configurations where the thread rubber 4F3 overlaps with the grooves 14AL, 14AR and the grooves 14BL, 14BR.

[0070] The grooves 14AL, 14AR and the grooves 14BL, 14BR are not limited to compressed grooves. The grooves 14AL, 14AR and the grooves 14BL, 14BR may be hollowed-out grooves or through-grooves formed by reducing the basis weight of the pulp in the absorbent core 8c only in the groove-forming areas, as long as they can be used as starting points for folding the absorbent body 8. By using the grooves 14AL, 14AR and the grooves 14BL, 14BR as compressed grooves, the groove-forming areas can be made highly rigid, preventing the groove-forming areas from losing their shape.

[0071] In this embodiment, the grooves 14AL and 14BL are connected, and the grooves 14AR and 14BR are connected. This allows the grooves 14AL and 14BL, and the grooves 14AR and 14BR to be integrally formed. The grooves 14AL and 14BL may be adjacent to each other with a gap therebetween, and the grooves 14AR and 14BR may be adjacent to each other with a gap therebetween. Furthermore, when a gap is provided between these grooves, the end of the groove 14BL does not have to be positioned on an extension line of the groove 14AL, and the end of the groove 14BR does not have to be positioned on an extension line of the groove 14AR.

[0072] In addition, the non-adhesive region 15 is formed by the grooves 14BL and 14BR in the front body region when viewed from above. The diaper 1 includes a region overlapping the end of the crotch region 1B. When the legs are inserted through the left and right lower leg openings 2L, 2R provided on the outer sheath, the outer sheath is pulled outward in the width direction, and the rubber thread 4F3 is also pulled outward in the width direction. As a result, the outer sheath is pushed up toward the skin in the region where the rubber thread 4F3 extends in the width direction and crosses the crotch region 1B, but a non-adhesive region 15 is provided where the absorber 8 and the outer sheath are not adhered. Therefore, the absorber 8 is pushed up toward the urethral opening by the outer sheath, while remaining raised toward the urethral opening between the grooves 14BL, 14BR. This allows the absorber 8 to be pressed against the urethral opening, improving the adhesion of the absorber 8 to the wearer's skin.

[0073] In addition, the grooves 14BL and 14BR extend substantially parallel to the bending lines 10L2 and 10R2 which are the standing lines of the side sheets 10L and 10R shown in FIG. 5 at both ends in the width direction when viewed in plan. The diaper 1 is configured such that the absorber 8 can be easily bent along the grooves 14BL and 14BR so that the cross section in the width direction becomes a W shape.

[0074] Next, the groove 14C will be described. The groove 14C is formed in the absorber 8, is disposed on the rear waist region 1R side of the grooves 14BL and 14BR, and extends in the width direction. The groove 14C is a squeezing groove formed by squeezing the absorber 8. Note that the groove 14C may be formed by squeezing only the absorbent core 8c, or may be formed by squeezing the absorber 8 including the core wrap sheet 7. In the present embodiment, the groove 14C is formed by squeezing the core wrap sheet 7 and the absorbent core 8c from the skin side.

[0075] Since the groove 14C is a squeezing groove, it becomes a high-rigidity portion as compared with the outside of the groove formation region. Further, due to the formation of the grooves 14BL and 14BR in the diaper 1, in the worn state, the absorber 8 is narrowed in the left-right direction by the wearer's legs, and the absorber 8 is bent so as to be convex toward the skin side starting from the grooves 14BL and 14BR, improving the adhesion to the urethral orifice. However, if the portion of the absorber 8 that is convex toward the skin side starting from the grooves 14BL and 14BR extends to the anus of the wearer, the absorber 8 may become convex toward the anus and the absorber 8 may enter the gluteal cleft (crack) of the buttocks, giving the wearer a sense of discomfort. Further, if the absorber 8 enters the gluteal cleft of the buttocks, there is also a risk that feces discharged from the anus may be pushed upward toward the skin side by the absorber 8 and the feces may press against the skin. Therefore, it is not preferable for the absorber 8 to become convex toward the anus and for the absorber 8 to enter the gluteal cleft of the buttocks.

[0076] In order to suppress the occurrence of this problem, in the diaper 1 according to the present embodiment, a groove 14C is formed. By providing the groove 14C, the diaper 1 can prevent the absorber 8 from protruding toward the skin side in the region corresponding to the anus of the diaper 1 (anus-corresponding region 30). By providing the groove 14C, which is a high-rigidity portion extending in the left-right direction in the region corresponding to the anus, the diaper 1 forms a space between the anus or the gluteal cleft and the absorber 8, suppressing the occurrence of the above-described problem. In FIG. 4, the region corresponding to the anus is the region where the wearer's anus is located when the diaper 1 is worn.

[0077] The grooves 14BL and 14BR are configured to be foldable into a W shape when the absorber 8 is cut in the width direction, and the skin surface side of the absorber 8 can be pressed against the urethral orifice. Even if the grooves 14BL and 14BR are provided only in the urethral orifice-corresponding region, if the absorber 8 becomes flat in a portion other than the groove-forming region, the grooves do not function as a folding mechanism for the absorber 8. For this reason, it is necessary to extend the grooves longer than the urethral orifice-corresponding region. Therefore, in the present embodiment, the pair of left and right grooves 14BL and 14BR extending along the longitudinal direction of the diaper 1 extend including from the ventral urethral orifice-corresponding region to the dorsal anus-corresponding region 30. The anus-corresponding region 30 is the region where the wearer's anus is located when the diaper 1 is worn. The diaper 1 according to the present embodiment can fold the absorber 8 into a W shape by extending the grooves 14BL and 14BR to the anus-corresponding region 30, enhancing the adhesion of the absorber 8 to the wearer's urethral orifice. However, when the grooves 14BL and 14BR are formed up to the anus-corresponding region 30 and the absorber 8 bends along the grooves 14BL and 14BR, there is a risk that the absorber 8 will bite into the gluteal cleft (crack) of the wearer's buttocks. If the absorber bites into the wearer's gluteal cleft, the wearer feels a sense of pressure, and the feces discharged by the wearer hits the skin surface around the gluteal cleft, deteriorating the wearing comfort. Therefore, the diaper 1 according to the present embodiment includes the groove 14C. Thereby, the diaper 1 can suppress the absorber 8 in the anus-corresponding region 30 from bending along the grooves 14BL and 14BR, and can prevent the absorber 8 from biting into the wearer's gluteal cleft, suppressing a decrease in the wearing comfort.

[0078] Also, in this embodiment, since the grooves 14BL and 14BR are also squeezing grooves, the grooves 14BL and 14BR and the groove 14C can be formed in the same process. Further, the groove 14C may be connected to the grooves 14BL and 14BR. Thereby, the grooves 14BL and 14BR and the groove 14C can be integrally formed. Also, even if the groove 14C is connected to the grooves 14BL and 14BR, the absorber 8 protrudes toward the skin side between the grooves 14BL and 14BR, but the protrusion of the absorber 8 is suppressed in the formation region of the groove 14C on the back side thereof. Further, the grooves 14BL and 14BR are disposed on the front body region 1F side rather than the region corresponding to the anus of the wearer (anus corresponding region 30). Thereby, the diaper 1 can suppress the absorber 8 from protruding in the region corresponding to the anus (anus corresponding region 30).

[0079] The diaper 1 also includes a thread rubber 4F7 adhesively bonded in an extended state in the longitudinal direction on the non-skin surface side of the absorber 8. The thread rubber 4F7 is disposed in a region overlapping between the pair of grooves 14BL and 14BR and expands and contracts in the longitudinal direction. The thread rubber 4F7 contracts the inner cover sheet 5 and the cover sheet 4 which are outer packages, and pushes up the absorber 8 toward the skin surface side. Thereby, the diaper 1 can lift the portion where the absorber 8 protrudes toward the urethral orifice side between the pair of grooves 14BL and 14BR to the skin surface side by the outer package. Since the diaper 1 can press the absorber 8 against the urethral orifice, the adhesion of the absorber 8 to the skin of the wearer can be improved.

[0080] Also, the thread rubber 4F7 extends including between the pair of left and right grooves 14AL and 14AR when the diaper 1 is viewed in plan. In a region where the absorber 8 is bent starting from the grooves 14AL and 14AR and is in a state along the groin, the outer package contracts in the longitudinal direction and floats on the non-skin side, and is easily deformed along the base of the leg. Thereby, the diaper 1 can improve the wearing feeling.

[0081] As described above, the thread rubber 4F7 extends between the grooves 14AL, 14AR and the grooves 14BL, 14BR. As shown in FIG. 3, in the state where the diaper 1 is viewed in plan view, the thread rubber 4F7 does not overlap with the thread rubber 4F2 for the tummy gather. By configuring the diaper 1 in this way, a space is formed between the groin region 1B side of the tummy gather and the wearer's skin surface, and urine that has reached the left - right direction on the front body region 1F side (ventral side) is likely to flow into the other side in the left - right direction. For example, when the wearer is male and urinates with the tip of the male genitalia facing either the left or right direction, the urine is likely to flow into the other side in the left - right direction, so the diaper 1 can suppress urine leakage.

[0082] Also, the thread rubber 4F7 is disposed on the front body region 1F side rather than in the region corresponding to the anus of the wearer (anus - corresponding region 30). In other words, the thread rubber 4F7 is disposed on the front body region 1F side of the groove 14C. By configuring in this way, the diaper 1 lifts the outer package body toward the skin surface side by the contraction force of the thread rubber 4F7, and thereby lifts the convex portion of the absorber 8 between the grooves 14BL, 14BR toward the skin surface side, but suppresses the absorber 8 from lifting toward the skin surface side in the region corresponding to the anus (anus - corresponding region 30). The diaper 1 can make it easier for the anus to be separated from the skin surface side of the diaper 1.

[0083] <Modification Example 1> Next, the diaper according to Modification Example 1 of the present embodiment will be described. FIG. 11 is a plan view showing the diaper 1 according to this modification with the backsheet 6, the absorbent core 8c, the topsheet 9, and the side sheets 10L, 10R removed. In this modification, among the plurality of thread rubbers 10L1, 10R1, the expansion - contraction region of the thread rubber disposed on the innermost side is shorter than the expansion - contraction region of the thread rubber 10L1, 10R1 disposed on the outermost side. The expansion - contraction region of the thread rubber can be adjusted by the length of the thread rubber and the adhesion region of the thread rubber. The diaper 1 according to this modification can make it easier for the outer region to stand up by contracting the inner side of the free - end - side piece in a shorter range than the outer side, and can suppress the free end portion of the three - dimensional gather from falling toward the topsheet 9 side.

[0084] <Modification Example 2> Next, the diaper according to Modification 2 of the present embodiment will be described. FIG. 12 is a cross-sectional view of the three-dimensional gathers 3BL cut in the width direction at the center in the longitudinal direction of the diaper. As shown in FIG. 12, among the plurality of thread rubbers 10L1, the elongation rate of the thread rubber 10L1 disposed closest to the inner side in the width direction is greater than that of the elastic member disposed on the outermost side in the width direction, and the thread rubber 10L1 disposed closest to the inner side in the width direction is folded Bending part along the 3BL2 Bending part and is disposed so as to be in contact with the 3BL2. It is desirable from the viewpoint of leakage prevention that the three-dimensional gathers 3BL and 3BR come into contact with the skin from the inner folds 3BL2 and 3BR2 in the width direction. For this reason, the thread rubber 10L1 disposed closest to the inner side in the width direction is folded Bending part along the 3BL2 Bending part and is disposed so as to be in contact with the 3BL2. Bending part

[0085] Further, if the three-dimensional gathers 3BL and 3BR have a strong contracting force on the outer side in the width direction and a strong contracting color on the inner side in the width direction, when standing up, the outer side in the width direction is likely to approach the skin side. The diaper 1 can stand up the inner side in the width direction of the three-dimensional gathers 3BL and 3BR more easily than the outer side in the width direction, so that the inner side in the width direction of the three-dimensional gathers 3BL and 3BR can be made to stand up, and thereby, the outer side in the width direction of the three-dimensional gathers 3BL and 3BR is also likely to stand up. The diaper 1 can suppress leakage of excreta by making the three-dimensional gathers 3BL and 3BR stand up from the inner side in the width direction and bringing the outer side in the width direction from the inner side in the width direction into contact with the skin surface.

[0086] As described above, the elongation rate means the draft rate. The diaper according to this modification can suppress the free end 3BL4 of the three-dimensional gather 3BL from falling toward the topsheet 9 side by making the elongation rate of the thread rubber 10L1 disposed closest to the inner side in the width direction greater than the elongation rate of the thread rubber 10L1 disposed on the outermost side in the width direction. The same applies to the three-dimensional gather 3BR.

[0087] ​In the above-described embodiment, the exterior body on the front body region side and the exterior body on the back body region side are integrally formed. However, the exterior body on the front body region side and the exterior body on the back body region side may be provided separately.

[0088] The embodiments and modification examples disclosed above can be combined with each other.

Explanation of Reference Numerals

[0089] 1B: Inseam Region 1F: Front Body Region 1R: Back Body Region 2L: Left Lower Limb Opening 2R: Right Lower Limb Opening 2T: Torso Opening 3BL, 3BR: Three-dimensional Gathers 3BL1, 3BR1: Base End Side Piece 3BL2, 3BR2: Fold Bending part 3BL3, 3BR3: Free End Side Piece 3BL4, 3BR4: Free End 3LF, 3LR: Leg Gathers 3R: Waist Gather 4: Cover Sheet 4F1, 4F2, 4F3, 4F7: Thread Rubber 4F4, 4F5: Edge 4FF: Fold Line 4R1, 4R2, 4R3, 4R3: Thread Rubber 4R4, 4R5: Edge 4RF: Fold Line 5: Inner Cover Sheet 6: Back Sheet 7: Core Lap Sheet 8: Absorbent Body 8c: Absorbent Core 9: Top Sheet 10L, 10R: Side Sheet 10L1, 10R1: Thread Rubber 10L2, 10R2: Fold Line 11F, 11R: End Sheet 12: Tummy Gather 13: Thread rubber cover sheet 14: Line 14AL, 14AR, 14BL, 14BR, 14C: Groove 15: Non - adhesive area 16, 17, 18L, 18R, 19: Adhesive area 35: Base - end adhesive part 36: Free - end adhesive part 66: Hole

Claims

1. An absorbent article having a length along a longitudinal direction and a length along a width direction orthogonal to the longitudinal direction, an absorber provided at a position including the crotch portion and capable of absorbing the excreted liquid of the wearer, a topsheet having a water-permeable region provided on the skin side of the absorber, a pair of left and right leak-proof sheets extending in the longitudinal direction and disposed outside the center in the width direction, comprising: The leak-proof sheet is a non-water-permeable sheet disposed on the skin side of the topsheet, a base-end side piece joined to the topsheet, a bent portion bent from the base-end side piece toward the skin side and outward in the width direction, a free-end side piece extending outward in the width direction from the bent portion, a base-end fixing portion for fixing each of both longitudinal ends of the base-end side piece to the topsheet, a free-end fixing portion for fixing each of both longitudinal ends of the free-end side piece to the base-end side piece, a plurality of elastic members that are adhesively bonded in an extended state only to the free-end side piece outside the bent portion in the width direction and extend in the longitudinal direction, and are arranged with spaces from each other in the width direction, having: The distance between the free-end fixing portions on both sides in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction, Among the plurality of elastic members, the elongation rate of the elastic member disposed on the outer side in the width direction is lower than the elongation rate of the elastic member disposed on the inner side in the width direction, Absorbent article.

2. Among the plurality of elastic members, the elastic region of the elastic member disposed most on the inner side in the width direction is shorter than the elastic region of the elastic member disposed most on the outer side in the width direction, The absorbent article according to claim 1.

3. Among the plurality of elastic members, the elongation rate of the elastic member disposed most on the inner side in the width direction is larger than the elongation rate of the elastic member disposed most on the outer side in the width direction, and the elastic member disposed most on the inner side in the width direction is arranged so as to contact the bent portion along the bent portion, The absorbent article according to claim 1.

4. an outer wrapper disposed on the non-skin side of the wearer with respect to the absorber, a non-adhesive region where the absorber and the outer wrapper are non-adhesive in the crotch portion, and a non-adhesive region provided at least at both ends in the width direction, The absorbent article according to any one of claims 1 to 3, comprising:

5. The non-adhesive region is provided in a region corresponding to the urethral orifice of the wearer in the crotch portion. The absorbent article according to claim 4.

6. An adhesive portion that is disposed adjacent to the non-adhesive region in the width direction, is an adhesive portion between the absorber and the outer wrapper, and is substantially parallel to the standing line on the skin side of the leak-proof sheet when viewed in plan. The absorbent article according to claim 4 or 5, comprising the same.

7. The non-adhesive region is continuously provided from one end side to the other end side in the width direction, An adhesive portion is provided so as to be adjacent to at least one of the non-adhesive region and the longitudinal direction, and the absorber and the outer wrapper are adhered to each other. The adhesive portion is provided at the central portion in the width direction, and both end portions in the width direction extend substantially parallel to the standing line on the skin side of the leak-proof sheet when viewed in plan. The absorbent article according to claim 4 or 5.

8. A groove formed in the absorber including the crotch portion and provided substantially parallel to the standing line on the skin side of the leak-proof sheet. The absorbent article according to any one of claims 1 to 7, comprising the same.

9. The groove is provided substantially parallel to each standing line on the skin side of the pair of left and right leak-proof sheets. The absorbent article according to claim 8.

10. The groove is a squeezing groove. The absorbent article according to claim 8 or 9.

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