Disposable diaper

Abstract

To provide a disposable diaper which allows a urine pad that is subsidiarily used to be easily inserted in a pocket provided on a skin surface side.SOLUTION: A disposable diaper 1 has a front side body part P, a back side body part Q, and a crotch part R between them and is formed into an underpants shape. In the crotch part R, an absorbent body 7 having a top sheet 8, a back sheet 9, and an absorbent core 10 arranged between them is provided. On an outer surface side of the absorbent body 7, an exterior member 2 is provided. On a skin surface side of the front side body part P and / or a skin surface side of the back side body part Q of the exterior member 2, a pocket 21, 22 opened to a central side in a front-back direction to cover a front end part 7A and / or a back end part 7B of the absorbent body 7 is provided. A maximum width of the absorbent core 10 in the front end part 7A and / or the back end part 7B is formed to be narrower than a maximum width of the absorbent core 10 in a part which is not covered with the pocket 21, 22 of the absorbent body 7.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to disposable diapers, and more particularly to disposable diapers that can be suitably used in combination with an inner pad which is an auxiliary urine pad.

Background Art

[0002] Conventionally, a method of using a disposable diaper by placing an auxiliary urine pad on the skin side has been known. According to such a usage method, since the urine pad first receives urine and the like excreted from the wearer, it is possible to reduce the total usage cost of the absorbent article by appropriately replacing only the urine pad and continuing to use the disposable diaper worn outside it. In addition, by replacing only the urine pad, caregivers and the like can perform the replacement work more easily than when replacing the disposable diaper worn outside the urine pad.

[0003] As a disposable diaper suitable for using an auxiliary urine pad in combination, for example, in Patent Document 1, there is an absorbent main body having a top sheet, a back sheet, and an absorber disposed between these two sheets, and an outer member to which the absorbent main body is fixed at least in part and which holds the absorbent main body against the wearer. In both end regions in the longitudinal direction of the absorbent main body, a strip-shaped sheet having elasticity is disposed in the direction around the waist of the diaper, and in the strip-shaped sheet, at least the portions located in the outer regions on both side edges of the absorbent main body are adhesively fixed to the outer member. A pant-type disposable diaper is disclosed. Patent Document 2 discloses a disposable diaper having a liquid-permeable surface sheet, a liquid-impermeable back-side sheet, and an interior body having an absorber interposed therebetween, and an exterior body fixed to the outer surface of the interior body and extending to the front and rear of the interior body. The disposable diaper is provided from the front body part to the back body part, and a plurality of pockets opening to the central side in the front-rear direction are provided on the inner surfaces of the front body part and the back body part, respectively. Patent Document 3 discloses a disposable diaper having an outer sheet having a front body part and a back body part, an interior body including an absorber fixed to the inner surface of the outer sheet, and a surface sheet. At the end of the back body part, a leakage-preventing sheet with the side part under the crotch being non-fixed to the surface sheet is provided, and an elastic stretch member extending in the width direction is provided on the side part under the crotch of the leakage-preventing sheet. The leakage-preventing sheet intersects with a three-dimensional gather, and the three-dimensional gather and the leakage-preventing sheet are fixed at this intersection region.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, conventionally, as a disposable diaper suitable for using a urine pad that is used supplementarily, a disposable diaper having a pocket or the like provided on the skin side of the diaper is known. However, it is desirable that the auxiliary urine pad can be easily inserted into the pocket on the skin side of the diaper. The present invention has been made in view of the above circumstances, and an object thereof is to provide a disposable diaper that can easily insert the front end portion and / or the rear end portion of an auxiliary urine pad into a pocket provided on the skin side of the disposable diaper.

Means for Solving the Problems

[0006] The disposable diaper of the present invention that has solved the above problems has a front torso portion, a rear torso portion, and a crotch portion located between them, and is formed in a pant shape; at least in the crotch portion, an absorbent body having a topsheet, a backsheet, and an absorbent core disposed between them is provided; an outer member is provided on the outer surface side of the absorbent body, and the outer member is disposed at least on the front torso portion and the rear torso portion, and the front torso portion and the rear torso portion of the outer member are joined to each other at both side portions in the width direction; on the skin side of the front torso portion and / or the skin side of the rear torso portion of the outer member, a pocket that opens to the center side in the front-rear direction of the disposable diaper is provided so as to cover the front end portion and / or the rear end portion of the absorbent body; the maximum width of the absorbent core at the front end portion and / or the rear end portion of the absorbent body covered by the pocket is characterized in that it is narrower than the maximum width of the absorbent core in the portion of the absorbent body not covered by the pocket.

[0007] In the disposable diaper of the present invention, since the absorbent core is formed to be narrow in the width direction at the portion overlapping with the pocket, when the opening edge of the pocket is lifted, it becomes easy to open the pocket greatly in the thickness direction. Therefore, it becomes easier to insert the front and rear end portions of the inner pad, which is an auxiliary urine pad, into the pocket. Note that the front and rear end portions of the inner pad mean the front end portion and / or the rear end portion of the inner pad.

[0008] The absorbent body is provided with rising flaps on both sides in the width direction on the skin side, and flap elastic members extending in the front-rear direction are provided on the rising flaps. The flap elastic members preferably extend from a position not overlapping with the pocket to a position overlapping with the pocket. By providing the rising flaps in this way, the rising flaps act to lift the opening edge of the pocket, making it easier to insert the front and rear end portions of the inner pad into the pocket.

[0009] Inside the pocket, at least a part of the rising base of the rising flap is preferably located outside the outer edge in the width direction of the absorbent core. Thereby, when the rising flap rises inside the pocket, the rising flap acts to lift the portion outside the outer edge in the width direction of the absorbent core, and the pocket can be opened widely in the thickness direction.

[0010] The front end of the rising flap is joined to the topsheet at the front end fixing portion, and the rear end is joined to the topsheet at the rear end fixing portion. The front end of the absorbent core is preferably located in front of the rear end of the front end fixing portion, and the rear end of the absorbent core is preferably located behind the front end of the rear end fixing portion. If the absorbent core is provided in this way, when the inner pad is arranged between the rising flaps in the standing state, the absorbent core will exist so as to extend outward in the front-rear direction from the front and rear end portions of the inner pad. Therefore, even if urine or the like excreted from the wearer leaks from the front and rear end portions of the inner pad, the urine or the like can be preferably absorbed by the absorbent core below, preventing leakage of urine or the like from the ventral side or the dorsal side.

[0011] It is preferable that an elastic member for the pocket is provided along the opening edge of the pocket. By providing the elastic member for the pocket, when the front and rear end portions of the inner pad are inserted into the pocket, the front and rear end portions of the inner pad are pressed by the elastic member for the pocket. Therefore, when the inner pad is installed on the skin side of the disposable diaper and worn, the front and rear end portions of the inner pad are less likely to come out of the pocket, and the inner pad is stably installed on the skin side of the disposable diaper.

[0012] The opening width of the pocket is preferably equal to or greater than the maximum width of the absorbent core. As a result, the opening width of the pocket is formed wide, and it becomes easy to open the pocket largely in the thickness direction.

[0013] The pocket is preferably formed by providing a cover sheet on the skin side of the front body portion and / or the skin side of the rear body portion of the outer member. Specifically, a cover sheet is provided on the skin side of the front body portion and / or the skin side of the rear body portion of the outer member, and the cover sheet has a joining region joined to the outer member and / or the absorbent body and a non-joining region not joined to either the outer member or the absorbent body. It is preferable that a pocket having the central side edge of the cover sheet as an opening edge is formed by the non-joining region extending outward in the front-rear direction from the central side edge in the front-rear direction of the cover sheet. By providing the cover sheet in this way, a pocket can be easily formed in the disposable diaper. In addition, the amount of the sheet member used to form the pocket can be reduced.

Advantages of the Invention

[0014] In the disposable diaper of the present invention, since the absorbent core is formed narrower in the width direction at the portion overlapping the pocket, when the opening edge of the pocket is lifted when the front and rear end portions of the inner pad are inserted into the pocket, the pocket is likely to open largely in the thickness direction. Therefore, it becomes easy to insert the front and rear end portions of the inner pad into the pocket.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

DETAILED DESCRIPTION OF THE INVENTION

[0016] Embodiments of the disposable diaper of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments shown in the drawings. FIGS. 1 to 7 show an example of the disposable diaper of the present invention. FIG. 1 represents a perspective view of the disposable diaper, FIG. 2 represents a plan view seen from the skin side in a state where the front body portion and the rear body portion of the disposable diaper shown in FIG. 1 are unfolded flat by releasing the joining thereof, FIG. 3 represents a cross-sectional view taken along line III-III of the disposable diaper shown in FIG. 2, FIG. 4 represents a cross-sectional view taken along line IV-IV of the disposable diaper shown in FIG. 2, FIG. 5 represents a partial plan view of the portion from the front body portion to the crotch portion of the disposable diaper shown in FIG. 2, FIG. 6 represents a partial plan view of the portion from the rear body portion to the crotch portion of the disposable diaper shown in FIG. 2, and FIG. 7 represents a plan view of the absorbent body provided in the disposable diaper shown in FIG. 2. In the drawings, arrow x represents the width direction, arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by arrows x and y represents the thickness direction z. Further, in FIGS. 2 and 5 to 7, the rising flaps are shown in a fallen state, and in FIG. 7, the portion where the opening edge of the pocket is located is indicated by a dashed line.

[0017] The disposable diaper 1 has a front body portion P, a rear body portion Q, and a crotch portion R located therebetween, and is formed in a pant shape having a waist opening 3 and a pair of leg openings 4. Specifically, the disposable diaper 1 has a front-rear direction y and a width direction x, and has a front body portion P, a rear body portion Q, and a crotch portion R located therebetween with respect to the front-rear direction y. The front body portion P and the rear body portion Q are joined at side seal portions 15 on both sides in the width direction x, thereby forming a pant shape having a waist opening 3 and a pair of leg openings 4.

[0018] In the disposable diaper 1, the front-back direction y corresponds to the direction extending in the front-back direction of the wearer's crotch when the diaper is worn. The front-back direction y corresponds to the vertical direction in the state where the disposable diaper 1 is formed in a pant shape. The width direction x means a direction that is on the same plane as the disposable diaper 1 and orthogonal to the front-back direction y, and corresponds to the left-right direction of the wearer when the diaper is worn. The disposable diaper 1 also has a skin side and an outer side with respect to the thickness direction z. The skin side means the side facing the wearer's skin when the diaper is worn, and the outer side means the side facing away from the wearer when the diaper is worn. These, the front-back direction y, the width direction x, and the thickness direction z are defined as the same directions for each member constituting the disposable diaper 1.

[0019] In the disposable diaper 1, the waist opening 3 is an opening for passing through the wearer's torso, and the leg opening 4 is an opening for passing through the wearer's legs. The front torso part P corresponds to the part that contacts the wearer's ventral side when the diaper is worn, and the rear torso part Q corresponds to the part that contacts the wearer's dorsal side when the diaper is worn. In the pant-shaped disposable diaper 1, the front torso part P and the rear torso part Q correspond to the parts located between the waist opening 3 and the leg opening 4. The crotch part R is located between the front torso part P and the rear torso part Q and corresponds to the part that contacts the wearer's crotch. The crotch part R is located between the pair of leg openings 4 and is not joined to each other on both sides in the width direction x.

[0020] The disposable diaper 1 is provided with an absorbent body 7 in which an absorbent core 10 is disposed between a top sheet 8 and a back sheet 9 in the crotch part R (see FIGS. 2 to 4 and FIG. 7). The absorbent body 7 only needs to exist at least in the crotch part R, and it is preferably further extended to the front torso part P and / or the rear torso part Q. More preferably, the absorbent body 7 extends from the crotch part R to the front torso part P and the rear torso part Q. In the disposable diaper 1 shown in the drawings, an absorbent body 7 in which an absorbent core 10 is disposed between a top sheet 8 and a back sheet 9 is provided on the skin side of the outer member 2 formed in a pant shape. The top sheet 8 is disposed on the skin side of the absorbent core 10, and the back sheet 9 is disposed on the outer side of the absorbent core 10.

[0021] The topsheet 8 is preferably liquid-permeable. For example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton, or a nonwoven fabric formed from hydrophobic fibers such as polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), etc., where the surface of the hydrophobic fibers is hydrophilized by a surfactant, can be used. Also, a woven fabric, a knitted fabric, a perforated plastic film, etc. may be used as the topsheet 8.

[0022] The backsheet 9 is preferably liquid-impermeable. For example, a nonwoven fabric formed from hydrophobic fibers such as polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), etc., or a plastic film, etc. can be used. Also, a laminate of a nonwoven fabric and a plastic film may be used.

[0023] When the topsheet 8 and the backsheet 9 are made of nonwoven fabric, it is preferable to use a spunbond nonwoven fabric, an air-through nonwoven fabric, a point-bond nonwoven fabric, a meltblown nonwoven fabric, an airlaid nonwoven fabric, an SMS nonwoven fabric, etc.

[0024] The absorbent core 10 is not particularly limited as long as it contains an absorbent material capable of absorbing excreta such as urine. As the absorbent core 10, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used. The absorbent core 10 may be covered with a sheet member such as a paper sheet (for example, tissue paper or blotting paper) or a liquid-permeable nonwoven fabric. Examples of the absorbent material contained in the absorbent core 10 include hydrophilic fibers such as cellulose fibers (for example, pulverized pulp fibers), and water-absorbing resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, and starch-acrylonitrile-based resins. Further, the absorbent material may contain heat-sealable fibers such as polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and polyamide fibers such as nylon. These heat-sealable fibers may be hydrophilized with a surfactant or the like in order to enhance the affinity with body fluids such as urine.

[0025] From the viewpoint of increasing the absorption rate of urine and the like, it is preferable that the absorbent material contains hydrophilic fibers. Further, from the viewpoint of increasing the absorption capacity, it is preferable that the absorbent material contains a water-absorbing resin. Therefore, it is preferable that the absorbent core 10 contains hydrophilic fibers (particularly pulp fibers) and a water-absorbing resin. In this case, for example, it is preferable to use a mixture or dispersion of a water-absorbing resin in an aggregate of hydrophilic fibers.

[0026] The absorbent core 10 only needs to be present at least in the crotch portion R, and it is preferable that it further extends to the front body portion P and / or the rear body portion Q. The shape (planar shape) of the absorbent core 10 is not particularly limited, but as will be described later, the absorbent core 10 is formed with a narrow width at the front end portion and the rear end portion.

[0027] On the skin side of the absorbent body 7, it is preferable that rising flaps 11 are provided on both sides in the width direction x. The rising flaps 11 can prevent lateral leakage of excreta such as urine. The rising flaps 11 can be formed from a flap-forming sheet. For example, by joining the flap-forming sheet to both sides in the width direction x of the top sheet 8 so as to rise on the skin side of the absorbent body 7, the rising flaps 11 can be formed, or the flap-forming sheet joined to both sides in the width direction x of the back sheet 9 is folded back along the side edges of the absorbent body 7 so as to rise on the skin side of the absorbent body 7, whereby the rising flaps 11 can be formed. The rising flaps 11 are preferably liquid-impermeable.

[0028] It is preferable that flap elastic members 12 extending in the front-rear direction y are provided on the rising flaps 11. The flap elastic members 12 are preferably fixed to the rising flaps 11 in an extended state, and the contraction force of the flap elastic members 12 promotes the rising of the rising flaps 11.

[0029] It is preferable that the front and rear ends of the rising flaps 11 are joined to the top sheet 8. Specifically, it is preferable that the front end of the rising flap 11 is joined to the top sheet 8 at the front end fixing portion 13 and the rear end is joined to the top sheet 8 at the rear end fixing portion 14. Thereby, combined with the provision of the flap elastic members 12, when the disposable diaper 1 is worn, the portion between the front end and the rear end of the rising flap 11 is likely to rise toward the skin of the wearer.

[0030] An exterior member 2 is provided on the outer surface side of the absorbent body 7, and the exterior member 2 is disposed at least on the front body portion P and the rear body portion Q. The exterior member 2 has the front body portion P and the rear body portion Q joined to each other at side seal portions 15 on both side portions in the width direction x, and when the disposable diaper 1 is worn, the exterior member 2 covers the wearer's torso. The side seal portions 15 are formed, for example, by welding both sides in the width direction x of the front body portion P and the rear body portion Q to each other.

[0031] The exterior member 2 may be arranged only on the front body part P and the rear body part Q. In this case, the absorbent body 7 is provided so as to connect the front body part P and the rear body part Q of the exterior member 2, the absorbent body 7 extends from the crotch part R to the front body part P and the rear body part Q, and a part of the absorbent body 7 is exposed on the outer surface side of the disposable diaper 1 at the crotch part R. The exterior member 2 may be arranged on the front body part P, the crotch part R, and the rear body part Q. The exterior member 2 may be formed, for example, such that the front body part P, the rear body part Q, and the crotch part R located therebetween are continuously formed. In this case, the exterior member 2 can be formed into a pant shape by joining the front body part P and the rear body part Q to each other at the side seal part 15, and the absorbent body 7 is provided on at least the skin side of the crotch part R of the exterior member 2 formed into a pant shape. Alternatively, the exterior member 2 may be separated in the front-rear direction y at the crotch part R and may be composed of a portion extending from the front body part P to the crotch part R and a portion extending from the rear body part Q to the crotch part R, and the absorbent body 7 may be provided so as to connect both portions. In the disposable diaper 1 shown in the drawings, the exterior member 2 is formed into a pant shape.

[0032] The exterior member 2 is preferably provided so as to extend outward in the width direction x from the absorbent body 7 at the front body part P and the rear body part Q. The exterior member 2 is preferably provided so as to extend outward in the width direction x from the absorbent body 7 also at the crotch part R. The exterior member 2 is also preferably provided so as to extend outward, that is, forward and backward, in the front-rear direction y from the absorbent body 7.

[0033] The exterior member 2 preferably has an inner sheet 5 and an outer sheet 6 disposed on the outer surface side of the inner sheet 5. The absorbent body 7 is preferably provided on the skin side of the inner sheet 5. The inner sheet 5 and the outer sheet 6 may be liquid-permeable or liquid-impermeable, and a sheet material usable for the top sheet 8 or the back sheet 9 can be used. In the drawings, the inner sheet 5 and the outer sheet 6 are each formed to have a pant shape. However, when the exterior member 2 is formed in a pant shape, at least one of the inner sheet 5 and the outer sheet 6 may be formed in a pant shape. For example, one of the inner sheet 5 and the outer sheet 6 may be provided separately in the front-rear direction y at the crotch portion R.

[0034] It is preferable that a leg elastic member 16 is provided along the edge of the leg opening 4 on the exterior member 2. The leg elastic member 16 is composed of, for example, a front leg elastic member 16A that crosses the crotch portion R and is provided along the front edge of the leg opening 4, and a rear leg elastic member 16B that crosses the crotch portion R and is provided along the rear edge of the leg opening 4. The front leg elastic member 16A and the rear leg elastic member 16B provide an elastic member substantially around the entire circumference of the edge of the leg opening 4, forming a leg gather along the wearer's leg circumference and preventing leakage of urine or the like from the crotch portion. In the drawings, the front leg elastic member 16A and the rear leg elastic member 16B are provided spaced apart from each other. However, a part of the front leg elastic member 16A and the rear leg elastic member 16B may be in contact with or cross each other. When the exterior member 2 is composed of the inner sheet 5 and the outer sheet 6, the leg elastic member 16 is preferably disposed between the inner sheet 5 and the outer sheet 6 and is preferably adhered to the inner sheet 5 and / or the outer sheet 6.

[0035] It is preferable that a plurality of body elastic members 17 extending in the width direction x are provided on the front body part P and the rear body part Q of the outer member 2. The body elastic members 17 are provided between the waist opening 3 and the leg opening 4. The body elastic members 17 enhance the fitness around the wearer's body. Among the body elastic members 17, elastic members provided at narrow intervals in the front-back direction y along the edge of the waist opening 3 may be provided as waist elastic members 18. Thereby, a waist gather is formed along the wearer's waist, and leakage of excrement such as urine from the back side or the abdominal side is prevented. In the drawings, the waist elastic members 18 are provided at narrower intervals in the front-back direction y than the body elastic members 17.

[0036] The body elastic members 17 are preferably provided between the inner sheet 5 and the outer sheet 6. In this case, the body elastic members 17 are preferably adhered to the inner sheet 5 and / or the outer sheet 6. The waist elastic members 18 may be provided between the inner sheet 5 and the outer sheet 6, or the outer sheet 6 may be folded back to the inner sheet 5 side at the edge of the waist opening 3 of the outer member 2, and the waist elastic members 18 may be provided between the folded outer sheets 6 (see FIG. 4). In this case, the waist elastic members 18 are preferably adhered to the outer sheet 6.

[0037] As each elastic member provided in the disposable diaper 1, an elastic stretch material used in ordinary disposable diapers such as polyurethane yarn, polyurethane film, and natural rubber can be used. Each elastic member is preferably fixed to the diaper in a stretched state, and is preferably fixed with an adhesive such as a hot melt adhesive. For example, a polyurethane yarn having a fineness of 40 to 1,240 dtex is stretched and disposed at a magnification of 1.1 to 5.0 times and fixed. As the adhesive, a rubber-based hot melt adhesive is preferably used. The magnification is set to 1.0 times in the non-stretched state.

[0038] As shown in FIGS. 2 and 4, the disposable diaper 1 is provided with pockets 21 and 22 that open on the skin side of the front body portion P and / or the skin side of the rear body portion Q, on the center side in the front-rear direction y of the disposable diaper 1. By providing the pockets 21 and 22 in this way, the disposable diaper 1 can stably arrange an auxiliary urine pad (hereinafter referred to as an "inner pad") on the skin side of the disposable diaper 1. FIG. 9 shows an example in which the inner pad 31 is arranged on the skin side of the disposable diaper 1 shown in FIG. 2. By inserting the front and rear end portions of the inner pad 31 into the pockets 21 and 22, the inner pad 31 can be stably arranged on the skin side of the disposable diaper 1. The pocket 21 provided on the skin side of the front body portion P is referred to as the "front pocket 21", and the pocket 22 provided on the skin side of the rear body portion Q is referred to as the "rear pocket 22". Also, in this specification, "pockets 21, 22" means the front pocket 21 and / or the rear pocket 22. The disposable diaper 1 may be provided with only one of the front pocket 21 and the rear pocket 22, or both may be provided, but it is preferable to provide both the front pocket 21 and the rear pocket 22.

[0039] The pockets 21 and 22 can be formed by providing cover sheets 19 and 20 on the skin side of the front body portion P and / or the skin side of the rear body portion Q of the outer member 2. Specifically, the front pocket 21 can be formed by providing the front cover sheet 19 on the skin side of the front body portion P of the outer member 2, and the rear pocket 22 can be formed by providing the rear cover sheet 20 on the skin side of the rear body portion Q of the outer member 2. Also, in this specification, "cover sheets 19, 20" means the front cover sheet 19 and / or the rear cover sheet 20. The method of forming the pockets 21 and 22 from the cover sheets 19 and 20 will be described in detail with reference to FIG. 8.

[0040] FIG. 8 shows an example of the formation of a joint region where the cover sheets 19 and 20 are joined to the exterior member 2 for the disposable diaper 1 shown in FIG. 2. In FIG. 8, the joint regions of the cover sheets 19 and 20 to the exterior member 2 are indicated by cross-hatching, and the outer edges of the pockets 21 and 22 are indicated by a two-dot chain line. Also, for ease of understanding, the leg elastic member, the body elastic member, the waist elastic member, and the pocket elastic member described later are shown omitted.

[0041] The cover sheets 19 and 20 have central side edges 19E and 20E on the central side in the front-rear direction y of the disposable diaper 1. In the front cover sheet 19, the central side edge 19E means the rear edge of the front cover sheet 19. In the rear cover sheet 20, the central side edge 20E means the front edge of the rear cover sheet 20. In the following description, the reference sign "19E" is used for both the "central side edge" and the "rear edge" of the front cover sheet 19, and the reference sign "20E" is used for both the "central side edge" and the "front edge" of the rear cover sheet 20.

[0042] The cover sheets 19 and 20 have joint regions 19A and 20A joined to the exterior member 2 and non-joint regions 19B and 20B not joined to either the exterior member 2 or the absorbent body 7. The non-joint regions 19B and 20B extend outward in the front-rear direction y of the disposable diaper 1 from the central side edges 19E and 20E of the cover sheets 19 and 20, thereby forming pockets 21 and 22 with the central side edges 19E and 20E of the cover sheets 19 and 20 as the opening edges 21E and 22E. Specifically, the front cover sheet 19 has a joint region 19A joined to the exterior member 2 and a non-joint region 19B not joined to either the exterior member 2 or the absorbent body 7. The non-joint region 19B extends forward from the rear edge 19E of the front cover sheet 19, thereby forming the front pocket 21 with the rear edge 19E of the front cover sheet 19 as the opening edge 21E. The rear cover sheet 20 has a joint region 20A joined to the exterior member 2 and a non-joint region 20B not joined to either the exterior member 2 or the absorbent body 7. The non-joint region 20B extends rearward from the front edge 20E of the rear cover sheet 20, thereby forming the rear pocket 22 with the front edge 20E of the rear cover sheet 20 as the opening edge 22E. By providing the cover sheets 19 and 20 in this way, the pockets 21 and 22 can be formed simply. Also, the amount of sheet member used to form the pockets 21 and 22 can be reduced. Although not shown in the drawings, the joint regions 19A and 20A of the cover sheets 19 and 20 may be formed to join to the absorbent body 7 together with the exterior member 2 or instead of the exterior member 2.

[0043] In the joint regions 19A and 20A of the cover sheets 19 and 20, the joining means between the cover sheets 19 and 20 and the exterior member 2 and / or the absorbent body 7 is not particularly limited, and known joining means such as welding (e.g., heat sealing or ultrasonic welding) or adhesives can be employed. For simplicity, the cover sheets 19 and 20 are joined to the exterior member 2 and / or the absorbent body 7 with an adhesive.

[0044] The front pocket 21 is formed by the non-joined region 19B of the front cover sheet 19 extending forward by a width of a predetermined length or more (for example, a width of 50 mm or more or 80 mm or more) from the rear edge 19E of the front cover sheet 19. At the opening of the front pocket 21, joined regions 19A exist on both sides in the width direction x of the non-joined region 19B of the front cover sheet 19, and the rearmost portion of the non-joined region 19B located between the joined regions 19A on both sides serves as the opening of the front pocket 21, and the length in the width direction x of this portion becomes the opening width W1 of the front pocket 21. A joined region 19A exists at the front end 21H of the front pocket 21, and the length in the front-rear direction y from the opening edge 21E of the front pocket 21 to the joined region 19A that hits the front end 21H of the front pocket 21 becomes the depth length D1 of the front pocket 21. The non-joined region 19B forming the front pocket 21 may be formed with a constant width from the opening edge 21E of the front pocket 21 in the depth direction, that is, forward from the rear edge 19E of the front cover sheet 19, or may be formed so that the width varies.

[0045] The rear pocket 22 is formed by the non-joined region 20B of the rear cover sheet 20 extending rearward by a width of a predetermined length or more (for example, a width of 50 mm or more or 80 mm or more) from the front edge 20E of the rear cover sheet 20. At the opening of the rear pocket 22, joined regions 20A exist on both sides in the width direction x of the non-joined region 20B of the rear cover sheet 20, and the foremost portion of the non-joined region 20B located between the joined regions 20A on both sides serves as the opening of the rear pocket 22, and the length in the width direction x of this portion becomes the opening width W2 of the rear pocket 22. A joined region 20A exists at the rear end 22H of the rear pocket 22, and the length in the front-rear direction y from the opening edge 22E to the joined region 20A that hits the rear end 22H of the rear pocket 22 becomes the depth length D2 of the rear pocket 22. The non-joined region 20B forming the rear pocket 22 may be formed with a constant width from the opening edge 22E of the rear pocket 22 in the depth direction, that is, rearward from the front edge 20E of the rear cover sheet 20, or may be formed so that the width varies.

[0046] Although not shown in the drawings, the pockets 21 and 22 can be formed by folding back the sheet member constituting the exterior member 2 to the skin side, and using this folded-back portion as the cover sheets 19 and 20 described above. For example, the outer sheet 6 constituting the exterior member 2 is folded back to the skin side at the edge of the waist opening 3 of the exterior member 2, and a part of this folded-back portion is joined to the inner sheet 5 and / or the absorbent body 7 to form the above-described joining regions 19A and 20A, and the other part is not joined to either the inner sheet 5 or the absorbent body 7 to form the above-described non-joining regions 19B and 20B. Alternatively, the inner sheet 5 constituting the exterior member 2 is folded back to the skin side, and a part of this folded-back portion is joined to the opposing inner sheet 5 and / or the absorbent body 7 to form the above-described joining regions 19A and 20A, and the other part is not joined to either the opposing inner sheet 5 or the absorbent body 7 to form the above-described non-joining regions 19B and 20B. The cover sheets 19 and 20 also include a mode in which they are constituted by the folded-back portion of the sheet member forming the pockets 21 and 22 in this way, that is, the sheet member constituting the exterior member 2.

[0047] As shown in FIGS. 2 and 4 to 6, the pockets 21 and 22 are provided so as to cover the front end portion 7A and / or the rear end portion 7B of the absorbent body 7. That is, the cover sheets 19 and 20 are provided so as to cover the front end portion 7A and / or the rear end portion 7B of the absorbent body 7. Thereby, it is possible to prevent the front end portion 7A and / or the rear end portion 7B of the absorbent body 7 from curling up, and it becomes less likely for the wearer to feel discomfort when wearing the disposable diaper 1.

[0048] At the front end portion 7A and / or the rear end portion 7B of the absorbent body 7 covered by the pockets 21, 22, the absorbent core 10 is provided so as to overlap with the pockets 21, 22. Accordingly, the opening edge 21E of the front pocket 21 and / or the opening edge 22E of the rear pocket 22 are formed at positions overlapping the absorbent core 10. By providing the pockets 21, 22 in this manner, it becomes easier to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22. Further, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21, 22, the front and rear end portions of the inner pad 31 are supported by the absorbent core 10, and the front and rear end portions of the inner pad 31 are less likely to accidentally come out of the pockets 21, 22.

[0049] The positions of the pockets 21, 22 and the absorbent core 10 are defined in a state where the front body portion P and the rear body portion Q of the outer member 2 are unfolded by releasing the side seal portion 15 at the side seal portion 15 and the disposable diaper 1 is completely unfolded. For example, the disposable diaper 1 is unfolded in this manner, and after the elastic member provided in the disposable diaper 1 is finely cut so that the contraction force of the elastic member is not exhibited, the disposable diaper 1 is completely unfolded to define each position. In each drawing, a plan view, a cross-sectional view, etc. of the disposable diaper 1 in a completely unfolded state are shown. Also, other various positions and lengths in this specification are defined in the same manner.

[0050] The absorbent core 10 is formed such that the maximum width of the portion overlapping with the pockets 21, 22 is narrower than the maximum width of the portion not overlapping with the pockets 21, 22. That is, the maximum width of the absorbent core 10 at the front end portion 7A and / or the rear end portion 7B of the absorbent body 7 covered by the pockets 21, 22 is formed narrower than the maximum width of the absorbent core 10 at the portion of the absorbent body 7 not covered by the pockets 21, 22. By forming the absorbent core 10 in this way, it becomes easy to greatly open the pockets 21, 22 in the thickness direction z, and it becomes easy to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22. For example, when the maximum width of the portion of the absorbent core 10 overlapping with the pockets 21, 22 is formed to be the same as or wider than the maximum width of the portion of the absorbent core 10 not overlapping with the pockets 21, 22, when the opening edges 21E, 22E of the pockets 21, 22 are lifted in order to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22, since the lifting of the pockets 21, 22 by the both side portions in the width direction x of the absorbent core 10 is suppressed, it is difficult to greatly expand the pockets 21, 22 in the thickness direction z. On the other hand, in the disposable diaper 1 of the present invention, since the absorbent core 10 is formed narrower in the width direction x at the portion overlapping with the pockets 21, 22, when the opening edges 21E, 22E of the pockets 21, 22 are lifted, the pockets 21, 22 can be greatly opened in the thickness direction z. Therefore, it becomes easy to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22.

[0051] If the maximum width of the portion of the absorbent core 10 overlapping with the pockets 21, 22 is formed narrower than the maximum width of the portion not overlapping with the pockets 21, 22, in a part of the portion not overlapping with the pockets 21, 22, the length of the absorbent core 10 in the width direction x may be formed narrower than the maximum width of the absorbent core 10 in the portion not overlapping with the pockets 21, 22, and may further be formed narrower than the maximum width of the absorbent core 10 in the portion overlapping with the pockets 21, 22. For example, the absorbent core 10 may be formed in an hourglass shape with the middle portion in the front-rear direction y formed narrower.

[0052] At the front end 7A and / or the rear end 7B of the absorbent body 7 covered by the pockets 21, 22, it is preferable that the absorbent core 10 is formed such that the length in the width direction x does not increase toward the front end 10E1 or the rear end 10E2 of the absorbent core 10 (see FIG. 7). That is, in the portion where the absorbent core 10 overlaps with the pockets 21, 22, it is preferable that the length in the width direction x does not change or decreases toward the front end 10E1 or the rear end 10E2 of the absorbent core 10. The absorbent core 10 may be formed such that a part thereof has a constant length in the width direction x and the other part has a decreasing length in the width direction x toward the front end 10E1 or the rear end 10E2 of the absorbent core 10. If the absorbent core 10 is formed in this way, when the opening edges 21E, 22E of the pockets 21, 22 are lifted, it becomes easy to widely open the pockets 21, 22 in the thickness direction z to the depth of the pockets 21, 22.

[0053] The average value of the length in the width direction x of the portion where the absorbent core 10 overlaps with the front pocket 21 is preferably 30% or more, more preferably 40% or more, still more preferably 50% or more, and preferably 95% or less, more preferably 90% or less, still more preferably 85% or less of the maximum width of the absorbent core 10 (specifically, the maximum width of the portion where the absorbent core 10 does not overlap with the pockets 21, 22). The average value of the length in the width direction x of the portion where the absorbent core 10 overlaps with the rear pocket 22 is preferably 30% or more, more preferably 40% or more, still more preferably 50% or more, and preferably 95% or less, more preferably 90% or less, still more preferably 85% or less of the maximum width of the absorbent core 10 (specifically, the maximum width of the portion where the absorbent core 10 does not overlap with the pockets 21, 22). If the absorbent core 10 is formed in this way, it becomes easier to insert the front and rear ends of the inner pad 31 into the pockets 21, 22. From the same viewpoint, the length in the front-rear direction y of the portion where the absorbent core 10 overlaps with the front pocket 21 and the length in the front-rear direction y of the portion where the absorbent core 10 overlaps with the rear pocket 22 are each preferably 20 mm or more, more preferably 30 mm or more, and preferably 120 mm or less, more preferably 100 mm or less.

[0054] It is preferable that both the maximum width of the portion of the absorbent core 10 overlapping with the front pocket 21 and the maximum width of the portion overlapping with the rear pocket 22 are formed to be narrower than the maximum width of the portion where the front pocket 21 and the rear pocket 22 do not overlap. That is, both the maximum width of the absorbent core 10 at the front end portion 7A of the absorbent body 7 covered by the front pocket 21 and the maximum width of the absorbent core 10 at the rear end portion 7B of the absorbent body 7 covered by the rear pocket 22 are preferably formed to be narrower than the maximum width of the absorbent core 10 in the portion of the absorbent body 7 not covered by the front pocket 21 and the rear pocket 22. Thereby, it becomes easier to insert the front end portion of the inner pad 31 into the front pocket 21 and it becomes easier to insert the rear end portion of the inner pad 31 into the rear pocket 22.

[0055] It is preferable that the absorbent body 7 extends outward in the width direction x beyond the outer edge of the absorbent core 10 in the width direction x at the front end portion 7A and / or the rear end portion 7B covered by the pockets 21, 22. The absorbent body 7 is preferably formed in a substantially rectangular shape, for example. In this case, non - existent portions of the absorbent core 10 are formed on both side portions in the width direction x of the front end portion 7A and / or the rear end portion 7B of the absorbent body 7, and the outer surface side of the absorbent body 7 is preferably joined to the exterior member 2 at the non - existent portions of the absorbent core 10. Thereby, when the opening edges 21E, 22E of the pockets 21, 22 are lifted, a wider space for inserting the inner pad 31 can be formed between the absorbent body 7 and the pockets 21, 22 (cover sheets 19, 20). Incidentally, the outer surface side of the absorbent body 7 is preferably joined to the exterior member 2 also at the existent portions of the absorbent core 10.

[0056] It is preferable that the skin - facing side of the absorbent body 7 is not joined to the pockets 21, 22 (cover sheets 19, 20). Thereby, the internal space of the pockets 21, 22 is widely formed, and it becomes easier to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22.

[0057] From the viewpoint of facilitating the opening of the pockets 21 and 22 in the thickness direction z, the rising flap 11 is preferably formed so as to be able to stand up within the pockets 21 and 22. Therefore, the rising flap 11 is provided so as to extend from a position not overlapping the pockets 21 and 22 to a position overlapping the pockets 21 and 22, and the elastic member 12 for the flap extends from a position not overlapping the pockets 21 and 22 to a position overlapping the pockets 21 and 22, and it is preferable that the rising flap 11 is formed so as to be able to stand up within the pockets 21 and 22. The elastic member 12 for the flap is preferably provided continuously from a position not overlapping the pockets 21 and 22 to a position overlapping the pockets 21 and 22. Thereby, the rising flap 11 acts so as to lift the opening edges 21E and 22E of the pockets 21 and 22, and it becomes easier to insert the front and rear end portions of the inner pad 31 into the pockets 21 and 22. In this case, in order for the rising flap 11 to be able to stand up within the pockets 21 and 22, the rear end 13E of the front end fixing portion 13 of the rising flap 11 is preferably located in front of the opening edge 21E of the front pocket 21, and the front end 14E of the rear end fixing portion 14 of the rising flap 11 is preferably located behind the opening edge 22E of the rear pocket 22.

[0058] Within the pockets 21 and 22, that is, at the front end portion 7A and / or the rear end portion 7B of the absorbent body 7 covered by the pockets 21 and 22, at least a part of the standing base portion of the rising flap 11 is preferably located outside the outer edge in the width direction x of the absorbent core 10. Thereby, when the rising flap 11 stands up within the pockets 21 and 22, the rising flap 11 acts so as to lift the portion outside the outer edge in the width direction x of the absorbent core 10, and the pockets 21 and 22 can be opened widely in the thickness direction z. More preferably, within the pockets 21 and 22, the standing base portion of the rising flap 11 is located outside the outer edge in the width direction x of the absorbent core 10 over the entire length in the front-rear direction y. Note that the standing base portion of the rising flap 11 means the starting point where the rising flap 11 stands up and is formed so as to extend in the front-rear direction y.

[0059] The rising flap 11 is preferably formed so as to rise inward in the width direction x. Specifically, it is preferable that the portion between the front end portion and the rear end portion of the rising flap 11 is formed so as to rise inward in the width direction x. For this purpose, it is preferable that the inner surface in the width direction x of the rising flap 11 is joined to the top sheet 8 at the front end fixing portion 13 and the rear end fixing portion 14. Thereby, it becomes easier to stably arrange the inner pad 31 between the rising flaps 11 provided on both sides in the width direction x.

[0060] The rising flap 11 may or may not be joined to the pockets 21, 22 (cover sheets 19, 20) within the pockets 21, 22. From the viewpoint of making the internal space of the pockets 21, 22 wider when the rising flap 11 rises, it is preferable that the rising flap 11 is not joined to the pockets 21, 22 (cover sheets 19, 20). Also, by forming the rising flap 11 in this way, the method of arranging the inner pad 31 when the front and rear end portions of the inner pad 31 are inserted into the pockets 21, 22 can be appropriately selected. For example, depending on the size of the inner pad 31, it is possible to appropriately select to arrange the inner pad 31 between the rising flaps 11 in the standing state or on the rising flaps 11 in the fallen state.

[0061] Within the pockets 21, 22, at least a part of the elastic member 12 for the flap is preferably located outward in the width direction x from the outer edge of the absorbent core 10 in a state where the rising flap 11 lies inward in the width direction x. Specifically, within the pockets 21, 22, at a portion where the absorbent core 10 is formed to be narrow in width, the elastic member 12 for the flap is preferably located outward in the width direction x from the outer edge of the absorbent core 10 in a state where the rising flap 11 lies inward in the width direction x. If the elastic member 12 for the flap is provided in this way, within the pockets 21, 22, the elastic member 12 for the flap can act to lift a portion outward from the outer edge of the absorbent core 10 in the width direction x. Therefore, not only near the opening edges 21E, 22E of the pockets 21, 22 but also at the back of the pockets 21, 22, the pockets 21, 22 are likely to open in the thickness direction z, and it becomes easy to insert the front and rear end portions of the inner pad 31 to the back of the pockets 21, 22.

[0062] On the other hand, at least a part of the elastic member 12 for the flap, which does not overlap with the pockets 21, 22, is preferably located inward in the width direction x from the outer edge of the absorbent core 10 in a state where the rising flap 11 lies inward in the width direction x. If the elastic member 12 for the flap is provided in this way, when the inner pad 31 is disposed between the rising flaps 11 in the standing state, the inner pad 31 is likely to be stably held by the rising flaps 11.

[0063] The elastic member 12 for the flap preferably extends to the front end fixing portion 13 and the rear end fixing portion 14 or the vicinity thereof. For example, the front end of the elastic member 12 for the flap is preferably located within 25 mm (more preferably within 20 mm) behind the rear end 13E of the front end fixing portion 13 or in front of the rear end 13E of the front end fixing portion 13, and the rear end of the elastic member 12 for the flap is preferably located within 25 mm (more preferably within 20 mm) in front of the front end 14E of the rear end fixing portion 14 or behind the front end 14E of the rear end fixing portion 14. Thereby, the elastic member 12 for the flap can act to lift the portion outside the outer edge in the width direction x of the absorbent core 10 in a wider range in the front-rear direction y. More preferably, the front end of the elastic member 12 for the flap is located in front of the rear end 13E of the front end fixing portion 13, and more preferably, the rear end of the elastic member 12 for the flap is located behind the front end 14E of the rear end fixing portion 14.

[0064] In the pockets 21, 22, the rising flap 11 is preferably formed so as to be located outside the outer edge in the width direction x of the absorbent core 10 in the width direction x and not to overlap the absorbent core 10 in at least a part of the front-rear direction y in a state of being folded inward in the width direction x. If the rising flap 11 is formed in this way, it becomes easy to dispose the inner pad 31 on the folded rising flap 11. From the same viewpoint, the front end fixing portion 13 and / or the rear end fixing portion 14 are preferably provided so as not to overlap the absorbent core 10.

[0065] The front end 10E1 of the absorbent core 10 is preferably located in front of the rear end 13E of the front end fixing portion 13 of the rising flap 11, and the rear end 10E2 of the absorbent core 10 is preferably located behind the front end 14E of the rear end fixing portion 14 of the rising flap 11 (see FIG. 7). If the rising flap 11 is formed in this way, when the inner pad 31 is arranged between the rising flaps 11 in the standing state, the absorbent core 10 extends outward in the front-rear direction y beyond the front and rear end portions of the inner pad 31. Therefore, even if urine or the like excreted from the wearer leaks from the front and rear end portions of the inner pad 31, the urine or the like is preferably absorbed by the absorbent core 10 below, and leakage of urine or the like from the ventral side or the dorsal side can be prevented.

[0066] The opening widths W1 and W2 of the pockets 21 and 22 are preferably equal to or greater than the maximum width of the absorbent core 10. Thereby, the opening widths W1 and W2 of the pockets 21 and 22 are formed wide, and it becomes easy to open the pockets 21 and 22 widely in the thickness direction z. On the other hand, the upper limit of the opening widths W1 and W2 of the pockets 21 and 22 is preferably 150% or less of the maximum width of the absorbent core 10, more preferably 140% or less, and even more preferably 130% or less. Thereby, it becomes easier to stably hold the inner pad 31 in the state of being inserted into the pockets 21 and 22.

[0067] The opening width W1 of the front pocket 21 and the opening width W2 of the rear pocket 22 may be the same or different. For example, the opening width W2 of the rear pocket 22 may be formed longer than the opening width W1 of the front pocket 21. Thereby, when the inner pad 31 is disposed on the crotch portion R of the disposable diaper 1, the position in the width direction x of the front end portion of the inner pad 31 is accurately determined, and it becomes difficult for the inner pad 31 to hit the leg when the wearer moves the leg back and forth, and it becomes difficult for the wearer to feel that the inner pad 31 is in the way. Also, as a result, the inner pad 31 is stably disposed on the skin surface side of the disposable diaper 1, and the inner pad 31 can preferably receive urine or the like excreted from the wearer, and lateral leakage of urine or the like is less likely to occur. Further, when using a deformed inner pad 31 having a wider rear portion than the front portion, it becomes easy to insert the front and rear end portions of the deformed inner pad 31 into the pockets 21 and 22, and the state in which the front and rear end portions of the deformed inner pad 31 are inserted into the pockets 21 and 22 can be stably held. In this case, the opening width W2 of the rear pocket 22 is preferably 1.1 times or more, more preferably 1.2 times or more, of the opening width W1 of the front pocket 21, and preferably 2.0 times or less, more preferably 1.8 times or less, and even more preferably 1.6 times or less.

[0068] The depth length D1 of the front pocket 21 and the depth length D2 of the rear pocket 22 may be the same or different. The depth length D1 of the front pocket 21 and the depth length D2 of the rear pocket 22 are preferably 20 mm or more, more preferably 30 mm or more, and even more preferably 50 mm or more. Thereby, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21, 22, the front and rear end portions of the inner pad 31 are likely to be stably held. On the other hand, the depth length D1 of the front pocket 21 and the depth length D2 of the rear pocket 22 are preferably 150 mm or less, more preferably 120 mm or less, and even more preferably 100 mm or less. Thereby, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21, 22 and the inner pad 31 is disposed on the skin side of the disposable diaper 1, the inner pad 31 is less likely to shift greatly in the front-rear direction y, and it is less likely that the inner pad 31 comes out of the pockets 21, 22.

[0069] The depth length D1 of the front pocket 21 is preferably 0.3 times or more, more preferably 0.5 times or more, and preferably 1.5 times or less, more preferably 1.3 times or less of the opening width W1 of the front pocket 21. The depth length D2 of the rear pocket 22 is preferably 0.3 times or more, more preferably 0.5 times or more, and preferably 1.5 times or less, more preferably 1.3 times or less of the opening width W2 of the rear pocket 22. If the pockets 21, 22 are formed in this way, it becomes easy to stably hold the inner pad 31 in a state where the inner pad 31 is inserted into the pockets 21, 22.

[0070] The front cover sheet 19 forming the front pocket 21 is provided at least on the front body portion P, and may be provided from the front body portion P to the crotch portion R. Therefore, the opening edge 21E of the front pocket 21 may be located on the front body portion P or may be located on the crotch portion R. The front cover sheet 19 may be provided over the entire front body portion P, or may be provided only on a part of the front body portion P. The front cover sheet 19 is preferably provided wider than the absorbent body 7 in the width direction x, and preferably formed such that the length in the width direction x of the front body portion P of the outer member 2 is substantially the same.

[0071] The rear cover sheet 20 forming the rear pocket 22 is provided at least on the rear body part Q, and may be provided from the rear body part Q to the crotch part R. Therefore, the opening edge 22E of the rear pocket 22 may be located on the rear body part Q or on the crotch part R. The rear cover sheet 20 may be provided over the entire rear body part Q, or may be provided only on a part of the rear body part Q. The rear cover sheet 20 is preferably provided wider than the absorbent body 7 in the width direction x, and more preferably formed to have substantially the same length as the rear body part Q of the exterior member 2 in the width direction x.

[0072] The front cover sheet 19 is provided so as to substantially coincide with the front body part P of the exterior member 2 in the width direction x, the rear cover sheet 20 is provided so as to substantially coincide with the rear body part Q of the exterior member 2 in the width direction x, and it is preferable that the front cover sheet 19 and the rear cover sheet 20 are joined to each other at the side seal part 15. Thereby, it becomes difficult for the front cover sheet 19 and the rear cover sheet 20 to be peeled off from the exterior member 2, and the front pocket 21 and the rear pocket 22 are stably formed.

[0073] The cover sheets 19, 20 are preferably not joined to the absorbent body 7. Therefore, the joining region 19A of the front cover sheet 19 is preferably formed so as to join the front cover sheet 19 and the exterior member 2, and the joining region 20A of the rear cover sheet 20 is preferably formed so as to join the rear cover sheet 20 and the exterior member 2. It is more preferable that the front cover sheet 19 covers the front end portion 7A of the absorbent body 7 and is not joined to the absorbent body 7, and it is more preferable that the rear cover sheet 20 covers the rear end portion 7B of the absorbent body 7 and is not joined to the absorbent body 7. Thereby, it becomes easier to insert the front and rear end portions of the inner pad 31 into the pockets 21, 22. Further, when the rising flaps 11 are provided on both sides of the absorbent body 7 in the width direction x on the skin side, the rising flaps 11 are more likely to rise suitably.

[0074] The cover sheets 19 and 20 may have non-bonded regions 19B and 20B formed in a portion including the central side edges 19E and 20E (for example, a region within 5 mm from the central side edges 19E and 20E), extending outward in the width direction x beyond both ends of the opening of the pockets 21 and 22 in the width direction x. In this case, the central side edges 19E and 20E of the cover sheets 19 and 20 are not bonded to the exterior member 2 and the absorbent body 7 not only at the opening edges 21E and 22E of the pockets 21 and 22 but also in portions outward in the width direction x therefrom. If non-bonded regions 19B and 20B are formed at the central side edges 19E and 20E of the cover sheets 19 and 20 in this way, it becomes easier to insert the front and rear end portions of the inner pad 31 into the pockets 21 and 22.

[0075] The cover sheets 19 and 20 may be liquid-permeable (hydrophilic) or liquid-impermeable, and a sheet material usable for the top sheet 8 or the back sheet 9 can be used. For example, if the cover sheets 19 and 20 are liquid-permeable, even if urine or the like is excreted onto the cover sheets 19 and 20, the urine or the like can permeate through the cover sheets 19 and 20, and a wider portion of the inner pad 31 can contribute to the absorption of urine or the like. In this case, both the front cover sheet 19 and the rear cover sheet 20 may be liquid-permeable, or only one of them may be liquid-permeable.

[0076] One of the front cover sheet 19 and the rear cover sheet 20 may be liquid-permeable and the other may be liquid-impermeable. For example, the front cover sheet 19 may be liquid-permeable and the rear cover sheet 20 may be liquid-impermeable. In this case, when the inner pad 31 is installed on the skin side of the disposable diaper 1 and worn, a wider range of the front portion of the inner pad 31 can contribute to the absorption of urine or the like. On the other hand, since the rear cover sheet 20 is liquid-impermeable, it is possible to prevent leakage of urine or the like from the back side when the wearer is in the supine position, and it is possible to prevent the urine or the like absorbed by the inner pad 31 from permeating through the rear cover sheet 20 and oozing out. Therefore, the wearing feeling of the disposable diaper 1 can be enhanced.

[0077] It is preferable that pocket elastic members 23 and 24 are provided along the opening edges 21E and 22E of the pockets 21 and 22. Specifically, it is preferable that a pocket elastic member 23 is provided along the opening edge 21E of the front pocket 21, and it is preferable that a pocket elastic member 24 is provided along the opening edge 22E of the rear pocket 22. By providing the pocket elastic members 23 and 24, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21 and 22, the front and rear end portions of the inner pad 31 are pressed by the pocket elastic members 23 and 24. Therefore, when the inner pad 31 is installed on the skin side of the disposable diaper 1 and worn, the front and rear end portions of the inner pad 31 are less likely to come out of the pockets 21 and 22, and the inner pad 31 can be stably installed on the skin side of the disposable diaper 1. Note that the pocket elastic members 23 and 24 may be provided on only one of the front pocket 21 and the rear pocket 22, or both of them. Preferably, the pocket elastic members 23 and 24 are provided on both the front pocket 21 and the rear pocket 22. In this specification, "pocket elastic members 23 and 24" means the pocket elastic member 23 and / or the pocket elastic member 24.

[0078] The pocket elastic members 23 and 24 are preferably provided on the cover sheets 19 and 20 so as to overlap at least the non-bonded regions 19B and 20B forming the pockets 21 and 22 along the central edges 19E and 20E of the cover sheets 19 and 20. The pocket elastic members 23 and 24 are preferably fixed to the cover sheets 19 and 20 in an extended state.

[0079] The pocket elastic members 23 and 24 may be arranged on the skin side of the cover sheets 19 and 20, or may be arranged on the outer surface side of the cover sheets 19 and 20. Further, the cover sheets 19 and 20 may be folded back along a fold extending in the width direction x, and the pocket elastic members 23 and 24 may be arranged between the folded-back cover sheets 19 and 20. In this case, it is preferable that the fold of the cover sheets 19 and 20 becomes the central edges 19E and 20E of the cover sheets 19 and 20 to form the opening edges 21E and 22E of the pockets 21 and 22.

[0080] The elastic member 23 for the pocket provided in the front pocket 21 is preferably provided to be longer in the width direction x than the opening width W1 of the front pocket 21. The elastic member 24 for the pocket provided in the rear pocket 22 is preferably provided to be longer in the width direction x than the opening width W2 of the rear pocket 22. That is, the elastic members 23 and 24 for the pocket preferably extend outward in the width direction x beyond both ends of the pockets 21 and 22 with respect to the width direction x. By providing the elastic members 23 and 24 for the pocket in this way, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21 and 22, the front and rear end portions of the inner pad 31 are pressed by the elastic members 23 and 24 for the pocket over the entire width direction x, and the front and rear end portions of the inner pad 31 are less likely to come out of the pockets 21 and 22.

[0081] The number of the elastic members 23 for the pocket provided in the front pocket 21 may be one or a plurality. The number of the elastic members 24 for the pocket provided in the rear pocket 22 may be one or a plurality. In addition, it is preferable that a plurality of the elastic members 23 for the pocket are provided along the opening edge 21E in the front pocket 21, and it is preferable that a plurality of the elastic members 24 for the pocket are provided along the opening edge 22E in the rear pocket 22. If a plurality of the elastic members 23 and 24 for the pocket are provided in this way, the front and rear end portions of the inner pad 31 are pressed in a planar shape by the plurality of the elastic members 23 and 24 for the pocket, and the front and rear end portions of the inner pad 31 are more stably held in the pockets 21 and 22.

[0082] At least a part of the elastic members 23 and 24 for the pockets is preferably arranged to overlap with the absorbent core 10. When a plurality of elastic members 23 and 24 for the pockets are provided, it is preferable that at least one of these elastic members is arranged to overlap with the absorbent core 10. By providing the elastic members 23 and 24 for the pockets in this way, when the front and rear end portions of the inner pad 31 are inserted into the pockets 21 and 22, the front and rear end portions of the inner pad 31 are sandwiched between the absorbent core 10 and the elastic members 23 and 24 for the pockets, and it becomes easier to be stably held in the pockets 21 and 22.

[0083] The elastic members 23 and 24 for the pockets are preferably arranged in a region of 1 / 4 or less on the side of the opening edges 21E and 22E in the front-rear direction y in the pockets 21 and 22, more preferably in a region of 1 / 6 or less, and even more preferably in a region of 1 / 8 or less. When a plurality of elastic members 23 and 24 for the pockets are provided, it is preferable that at least one of these elastic members is arranged in such a region. Further, for the elastic members 23 and 24 for the pockets, it is preferable that at least one elastic member is arranged in a region within 5 mm from the opening edges 21E and 22E of the pockets 21 and 22, more preferably in a region within 3 mm, and even more preferably in a region within 2 mm. Thereby, gathers are preferably formed along the opening edges 21E and 22E of the pockets 21 and 22, and the front and rear end portions of the inner pad 31 are more easily held firmly by the elastic members 23 and 24 for the pockets.

[0084] The elastic members 23 and 24 for the pockets are preferably arranged only in a region of 1 / 2 or less on the side of the opening edges 21E and 22E in the front-rear direction y of the pockets 21 and 22. That is, when the pockets 21 and 22 are bisected in the depth direction (front-rear direction y), the elastic members 23 and 24 for the pockets are arranged in a region of 1 / 2 on the side of the opening edges 21E and 22E of the pockets 21 and 22, but it is preferable that the elastic members 23 and 24 for the pockets are not arranged in the inner 1 / 2 region of the pockets 21 and 22. Thereby, when inserting the front and rear end portions of the inner pad 31 into the pockets 21 and 22, it becomes easier to insert the front and rear end portions of the inner pad 31 to the back of the pockets 21 and 22. More preferably, the elastic members 23 and 24 for the pockets are arranged only in a region of 1 / 3 or less on the side of the opening edges 21E and 22E in the front-rear direction y of the pockets 21 and 22.

[0085] The front body elastic member 17A provided on the front body portion P of the outer member 2 is preferably not arranged to overlap the absorbent core 10. Alternatively, it is preferable that a part of the front body elastic member 17A overlaps the absorbent core 10, and the front body elastic member 17A is intermittently provided at the portion overlapping the absorbent core 10. By providing the front body elastic member 17A on the front body portion P of the outer member 2 in this way, it becomes less likely that the front end portion of the absorbent core 10 is distorted by the front body elastic member 17A, and it becomes easier to insert the front end portion of the inner pad 31 into the front pocket 21. Further, the front end portion of the inner pad 31 is likely to be stably held in a state where it is inserted into the front pocket 21. Note that the fact that the front body elastic member 17A is not arranged to overlap the absorbent core 10 means that all of the plurality of front body elastic members 17A are not arranged to overlap the absorbent core 10.

[0086] The rear body elastic member 17B provided on the rear body portion Q of the outer member 2 is preferably not arranged to overlap with the absorbent core 10. Alternatively, it is preferable that a part of the rear body elastic member 17B overlaps with the absorbent core 10, and the rear body elastic member 17B is intermittently provided at the overlapping portion with the absorbent core 10. By providing the rear body elastic member 17B on the rear body portion Q of the outer member 2 in this way, it becomes less likely that the rear end portion of the absorbent core 10 is distorted by the rear body elastic member 17B, and it becomes easier to insert the rear end portion of the inner pad 31 into the rear pocket 22. Also, it becomes easier to stably hold the rear end portion of the inner pad 31 in the state where it is inserted into the rear pocket 22. Note that the fact that the rear body elastic member 17B is not arranged to overlap with the absorbent core 10 means that all of the plurality of rear body elastic members 17B are not arranged to overlap with the absorbent core 10.

[0087] As shown in FIG. 5, the front end 21H of the front pocket 21, that is, the back side end of the front pocket 21, is located in front of the front end 7E1 of the absorbent body 7, and at least a part of the front body elastic member 17A is preferably arranged between the front end 21H of the front pocket 21 and the front end 7E1 of the absorbent body 7. If the front body elastic member 17A is provided in this way, when the front end portion of the inner pad 31 is inserted into the front pocket 21 and worn, the front end portion of the inner pad 31 is pressed against the wearer's skin by the front body elastic member 17A, and the front end portion of the inner pad 31 is likely to be stably held in the front pocket 21. Note that the front body elastic member 17A arranged between the front end 21H of the front pocket 21 and the front end 7E1 of the absorbent body 7 is preferably continuously provided between the front end 21H of the front pocket 21 and the front end 7E1 of the absorbent body 7.

[0088] As shown in FIG. 6, the rear end 22H of the rear pocket 22, that is, the inner end of the rear pocket 22, is located rearward of the rear end 7E2 of the absorbent body 7, and it is preferable that at least a part of the rear body elastic member 17B is disposed between the rear end 22H of the rear pocket 22 and the rear end 7E2 of the absorbent body 7. If the rear body elastic member 17B is provided in this way, when the rear end of the inner pad 31 is inserted into the rear pocket 22 and worn, the rear end of the inner pad 31 is pressed against the wearer's skin by the rear body elastic member 17B, and the rear end of the inner pad 31 is likely to be stably held in the rear pocket 22. Note that the rear body elastic member 17B disposed between the rear end 22H of the rear pocket 22 and the rear end 7E2 of the absorbent body 7 is preferably provided continuously between the rear end 22H of the rear pocket 22 and the rear end 7E2 of the absorbent body 7.

[0089] The present invention also provides a combination of a disposable diaper of the present invention described above and an inner pad disposed on the skin side of the disposable diaper. The inner pad is disposed on the topsheet of the disposable diaper of the present invention. According to the combination of the absorbent article of the present invention, by inserting the front and rear ends of the inner pad into the pockets of the disposable diaper, the inner pad can be stably disposed on the skin side of the disposable diaper. This will be described with reference to FIG. 9.

[0090] The inner pad 31 preferably has a top sheet, a back sheet, and an absorbent core 32 disposed therebetween. The top sheet of the inner pad 31 is preferably liquid-permeable and can be made of a material usable for the top sheet 8 of the disposable diaper 1 described above. The back sheet of the inner pad 31 may be liquid-permeable or liquid-impermeable and can be made of a material usable for the top sheet 8 or the back sheet 9 of the disposable diaper 1 described above. For the absorbent core 32 of the inner pad 31, reference is made to the description of the absorbent core 10 of the disposable diaper 1 above. The inner pad 31 may be provided with rising flaps on both sides in the width direction x on the skin side, and for the rising flaps of the inner pad 31, reference is made to the description of the rising flaps 11 of the disposable diaper 1 above. As the shape of the inner pad 31, a substantially rectangular shape, an hourglass shape, a racket shape, etc. are shown.

[0091] The width of the absorbent core 32 of the inner pad 31 is preferably narrower than the opening width W1 of the front pocket 21 and the opening width W2 of the rear pocket 22. Thereby, it becomes easier to insert the front and rear end portions of the inner pad 31 into the front pocket 21 and the rear pocket 22. The length of the absorbent core 32 of the inner pad 31 in the front-rear direction y is preferably longer than the length in the front-rear direction y from the opening edge 21E of the front pocket 21 to the opening edge 22E of the rear pocket 22 of the disposable diaper 1. Thereby, the inner pad 31 can be stably installed on the skin side of the disposable diaper 1 with the front and rear end portions of the inner pad 31 inserted into the front pocket 21 and the rear pocket 22.

Explanation of Reference Numerals

[0092] 1: Disposable Diaper 2: Outer Member 3: Waist Opening 4: Leg Opening 5: Inner Sheet 6: Outer Sheet 7: Absorbent Body 8: Top Sheet 9: Back Sheet 10: Absorbent Core 11: Rising flap 12: Elastic member for flap 13: Front end fixing part 14: Rear end fixing part 15: Side seal part 16: Leg elastic member, 16A: Front leg elastic member, 16B: Rear leg elastic member 17: Body elastic member, 17A: Front body elastic member, 17B: Rear body elastic member 18: Waist elastic member 19: Front cover sheet, 19A: Joint region, 19B: Non-joint region, 19E: Central side edge or rear side edge 20: Rear cover sheet, 20A: Joint region, 20B: Non-joint region, 20E: Central side edge or front side edge 21: Front pocket, 21E: Opening edge 22: Rear pocket, 22E: Opening edge 23: Elastic member for pocket (of front pocket) 24: Elastic member for pocket (of rear pocket) 31: Inner pad 32: Absorbent core (of inner pad) P: Front body part Q: Rear body part R: Crotch part

Claims

1. A disposable diaper having a front torso portion, a rear torso portion, and a crotch portion positioned therebetween, formed in a pant shape, wherein at least the crotch portion is provided with an absorbent body having a topsheet, a backsheet, and an absorbent core disposed therebetween, an outer member is provided on the outer surface side of the absorbent body, the outer member is disposed at least on the front torso portion and the rear torso portion, a plurality of front torso elastic members extending in the width direction of the disposable diaper are provided on the front torso portion of the outer member, a plurality of rear torso elastic members extending in the width direction of the disposable diaper are provided on the rear torso portion of the outer member, and the front torso portion and the rear torso portion of the outer member are joined to each other at both side portions in the width direction, a pocket opening toward the center in the front-rear direction of the disposable diaper is provided on the skin surface side of the front torso portion and / or the skin surface side of the rear torso portion of the outer member so as to cover the front end portion and / or the rear end portion of the absorbent body, the maximum width of the absorbent core at the front end portion and / or the rear end portion of the absorbent body covered by the pocket is formed to be narrower than the maximum width of the absorbent core at the portion of the absorbent body not covered by the pocket, the front end of the pocket provided on the front torso portion is located in front of the front end of the absorbent body, and at least a part of the front torso elastic member is disposed between the front end of the pocket provided on the front torso portion and the front end of the absorbent body, and / or the rear end of the pocket provided on the rear torso portion is located behind the rear end of the absorbent body, and at least a part of the rear torso elastic member is disposed between the rear end of the pocket provided on the rear torso portion and the rear end of the absorbent body. The disposable diaper is characterized by this.

2. The absorbent body is provided with rising flaps on both sides in the width direction on the skin surface side, and flap elastic members extending in the front-rear direction are provided on the rising flaps. The disposable diaper according to claim 1, wherein the flap elastic member extends from a position not overlapping the pocket to a position overlapping the pocket.

3. The disposable diaper according to claim 2, wherein at least a part of the rising base of the rising flap is located outside the outer edge in the width direction of the absorbent core within the pocket.

4. The rising flap has a front end joined to the top sheet at the front end fixing part and a rear end joined to the top sheet at the rear end fixing part. The front end of the absorbent core is located forward of the rear end of the front end fixing part, and the rear end of the absorbent core is located rearward of the front end of the rear end fixing part. The disposable diaper according to claim 2 or 3.

5. The disposable diaper according to any one of claims 1 to 4, wherein a pocket elastic member is provided along the opening edge of the pocket in the pocket.

6. The disposable diaper according to any one of claims 1 to 5, wherein the opening width of the pocket is equal to or greater than the maximum width of the absorbent core.

7. A cover sheet is provided on the skin side of the front body part and / or the skin side of the rear body part of the outer member. The cover sheet has a joined region joined to the outer member and / or the absorbent body, and a non-joined region not joined to either the outer member or the absorbent body. The non-joined region extends outward in the front-rear direction from the central side edge in the front-rear direction of the cover sheet, thereby forming the pocket having the central side edge of the cover sheet as an opening edge. The disposable diaper according to any one of claims 1 to 6.

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