JP6714644B2 - Disposable diapers - Google Patents

Description

The present invention relates to a disposable diaper having a waistband.

A disposable diaper in which a waist band is arranged in the back waistline region is known (for example, see Patent Document 1). The waist band is folded toward the crotch region near the waist opening and opens toward the crotch region side. Further, the waist band is fixed to the skin side sheet side at both side portions, and is configured so as not to stand up. Therefore, the waist band stands up on the wearer side in the area surrounded by the both-side fixing portions and the folds near the waist opening, and stores the excrement that moves to the waist opening side in the back waistline area.

JP, 2016-187510, A

In order to store the excrement by the waist band, it is preferable to provide a large pocket storage space. In the waste band of Patent Document 1, the rear end edge of the accommodation space is close to the waist opening, and it is easy to secure the length of the accommodation space in the front-rear direction. On the other hand, the outer edge of the accommodation space is close to the outer edge of the absorbent core. When the waistband stands up on the wearer side, it tends to stand up against the absorbent core having a relatively high rigidity in the disposable diaper, and if the outer edge of the accommodation space is close to the absorbent core, the outer edge of the accommodation space will be It may be difficult to get up. Since it becomes difficult for the outer edge of the accommodation space to rise, the rise of the entire accommodation space is hindered, and it may be difficult to secure the accommodation space.

Therefore, there is a demand for a disposable diaper that secures a pocket accommodation area by the waist band and can suppress the occurrence of post-leakage.

Disposable diaper according to one aspect, a front and rear direction and a width direction orthogonal to each other, a front waistline region, a back waistline region, and a crotch region disposed between the front waistline region and the rear waistline region, and an absorbent core. A skin-side sheet located on the skin-facing surface side of the absorbent core, and in the back waistline region, located on the skin-facing surface side of the skin-side sheet, and a waistband that expands and contracts in the width direction, And the waist band is an upright portion configured to be upright with respect to the skin side sheet, and an upright fulcrum of the upright portion outside the upright portion and the absorbent core in the width direction. It is a disposable diaper which has a 1st base end edge and a 2nd base end edge used as the upright fulcrum of the said standing part in the waist opening side rather than the said standing part, Comprising: The said 1st group in the extended state of the said disposable diaper. S≧Y is satisfied, where S is the distance between the edge and the absorbent core in the width direction and Y is the length in the front-back direction of the standing portion in the extended state.

FIG. 1 is a schematic plan view of the disposable diaper according to the first embodiment viewed from the skin facing surface side. FIG. 2 is a schematic cross-sectional view taken along the line 2A-2A shown in FIG. FIG. 3 is a schematic cross-sectional view taken along the line 3A-3A shown in FIG. FIG. 4 is a schematic cross-sectional view taken along the line 4A-4A shown in FIG. 1 in an expanded state. FIG. 5 is a schematic cross-sectional view taken along the line 4A-4A shown in FIG. 1 in a natural state. FIG. 6 is a diagram schematically showing a worn state in a cross section based on FIG. FIG. 7: is a schematic cross section in the extended state of the disposable diaper which concerns on 2nd Embodiment. FIG. 8: is a schematic cross section in the natural state of the disposable diaper which concerns on 2nd Embodiment.

(1) Outline of Embodiment At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
Disposable diaper according to one aspect, a front and rear direction and a width direction orthogonal to each other, a front waistline region, a back waistline region, and a crotch region disposed between the front waistline region and the rear waistline region, and an absorbent core. A skin-side sheet located on the skin-facing surface side of the absorbent core, and in the back waistline region, located on the skin-facing surface side of the skin-side sheet, and a waistband that expands and contracts in the width direction, And the waist band serves as an upright fulcrum of the upright portion on the outer side in the width direction with respect to the upright portion and the absorbent core, and the upright portion configured to be upright with respect to the skin side sheet. It is a disposable diaper which has a 1st base end edge and a 2nd base end edge used as the upright fulcrum of the said standing part in the waist opening side rather than the said standing part, Comprising: The said 1st group in the extended state of the said disposable diaper. S≧Y is satisfied, where S is the distance between the edge and the absorbent core in the width direction and Y is the length in the front-back direction of the standing portion in the extended state.

The upright portion of the waistband is configured to be upright from the first base end edge and the second base end edge, and forms a storage space for storing excrement. The distance between the first base end edge and the absorbent core in the width direction is equal to or greater than the length of the standing portion in the front-rear direction, and the height of the accommodation space that rises with respect to the outer edge of the absorbent core rises with respect to the second base end edge. It is possible to form the pocket so as to be higher than the height of the accommodation space. Therefore, the outer edge of the accommodation space does not easily rise due to the rigidity of the absorbent core, the entire accommodation space easily rises, and the accommodation space is easily secured. It is possible to secure a pocket accommodation section by the waist band and suppress the occurrence of post-leakage.

According to a preferred aspect, the second base end edge is located rearward of the rear end edge of the absorbent core, and the rear end edge of the absorbent core and the second base end edge in the extended state. If the distance in the front-rear direction from and is U, then S≦Y+U may be satisfied.

In the form in which the second base end edge is located rearward of the rear end edge of the absorbent core, the second base end edge may rise further to the wearer side with respect to the rear end edge of the absorbent core. At this time, the rising height of the accommodation space is Y+U. The height of the accommodation space by S is equal to or lower than the height of the rising of the accommodation space by Y+U, and the height of the rising of the accommodation space by Y+U can be suppressed.
The region between the absorbent core and the second base edge is located between the upright fulcrum of the waistband and the absorbent core, has lower rigidity than both sides in the front-rear direction, and is easily deformed. By satisfying S≦Y+U, it is possible to prevent the region between the absorbent core and the second base edge from being deformed due to the rising height of the accommodation space due to Y+U being too high, and to reduce the accommodation space of the pocket. Easy to secure.

According to a preferred aspect, the front end edge of the upright portion in the extended state is located on the front side of the rear end edge of the absorbent core, and the rear end edge and the upright portion of the absorbent core in the extended state. When the distance in the front-rear direction of the front end edge of is V, V≧U may be satisfied.

The length (V) in the front-rear direction of the region where the absorbent core overlaps in the standing portion is equal to or longer than the length (U) in the front-rear direction of the region where the absorbent core does not overlap in the standing portion. In the region where the absorbent core overlaps in the standing portion, the absorbent core having higher rigidity is located on the non-skin surface side than in the region where the absorbent core does not overlap, and the wearer side is more likely to stand up. By satisfying V≧U, the standing portion becomes easier to stand up.

According to a preferred aspect, in the extended state, the front end edge of the upright portion is located on the front side of the rear end edge of the absorbent core, and in the extended state, the front end edge of the upright portion is the absorbent core. If the distance in the front-rear direction between the rear end edge of the absorbent core and the front end edge of the upright portion located in the front side of the rear end edge is V, the above U may be satisfied. ..

The length (U) in the front-rear direction of the region where the absorbent cores do not overlap in the standing portion is longer than the length (V) in the front-rear direction of the region where the absorbent cores overlap in the standing portion. The length in the front-rear direction of the standing portion arranged on the rear side of the rear end edge of the absorbent core is longer than the length of the standing portion arranged on the front side of the rear end edge of the absorbent core in the front-rear direction. Therefore, the waist band pocket can be formed larger on the rear side than the rear edge of the absorbent core. The user can understand that the pocket of the waistband is arranged larger than the absorbent core on the rear side, and can feel a sense of safety against the leakage.

According to a preferred aspect, a reinforcing sheet may be provided in a region between the rear end edge of the absorbent core and the second base end edge in the extended state.

According to this aspect, the rigidity of the region between the rear end edge of the absorbent core and the second base end edge can be increased by the reinforcing sheet, and the difference in rigidity with the region where the absorbent core overlaps in the standing portion can be reduced. Therefore, the entire standing portion can be easily raised.

According to a preferred aspect, the reinforcing sheet may be arranged over the entire waist band in the width direction.

According to this aspect, the rigidity is increased by the reinforcing sheet over the entire area of the waist band in the width direction, and the upright portion is easily raised over the entire area of the waist band in the width direction.

According to a preferred aspect, the waist band has a joint portion extending from the second base end edge in the front-rear direction and joined to the skin-side sheet, and the contracting force of the joint portion is It may be lower than the contraction force of the rising portion.

According to this aspect, since the contracting force of the joint portion is low, the joint portion is less likely to adhere to the body than the standing portion. Since the joint portion is in close contact with the body, it is possible to prevent the standing portion that does not overlap the joint portion from being relatively separated from the body. Therefore, it is easy to secure the adhesion of the standing portion to the body.

According to a preferred aspect, the waist band has a joint portion extending from the second base edge in the front-rear direction and joined to the skin-side sheet, and the front-rear direction of the joint portion. If the length of is defined as X, then U≦X may be satisfied.

When a disposable diaper is worn by a sleeping wearer, the back waistline area may be inserted between the wearer's body and the bedding or the like. At this time, since the length of the joining portion in the front-rear direction is long, the rigidity of the joining portion is increased, and it is possible to suppress the curling of the second base end edge serving as the upright fulcrum of the upright portion. Further, even if the second base end edge is rolled up, since the length of the joint portion in the front-rear direction is long, it is easy to secure the second base end edge. Therefore, it is easy to maintain the upright fulcrum of the upright portion, and it is easier to secure the space for accommodating the pocket by the waistband.

According to a preferred aspect, the waist band has a folded-back portion that is folded back toward the wearer side with respect to the front end edge of the standing portion, and the contracting force of the folded-back portion is the contraction of the standing portion. It may be higher than strength.

According to this aspect, since the contraction force of the folded-back portion is relatively high, it is possible to secure the adhesion of the waistband to the body. In addition, since the contraction force of the upright portion is relatively low, it is possible to prevent the pocket from rising too much from the body due to the high contraction force of the upright portion, and to prevent a gap between the body and the pocket from occurring.

According to a preferred aspect, the length of the folded portion in the front-rear direction may be longer than the length of the upright portion in the front-rear direction.

According to this aspect, it is possible to secure a wide area in which the waistband contacts the body, improve the stability of the shape of the waistband, and suppress the occurrence of a gap between the waistband and the body. Further, by increasing the length of the folded-back portion in the front-rear direction, it is possible to suppress the contracted force per unit length even if the contracted force of the folded-back portion is increased. Therefore, the adhesion of the waist band can be secured while suppressing the pressure applied to the folded-back portion and suppressing the deterioration of the wearing feeling.

According to a preferred aspect, the skin-side sheet has a topsheet and a pair of sidesheets covering both outer side portions of the topsheet, and the sidesheets are erected by contraction of the leak-proof elastic member. Forming a pair of leak preventive gathers having a contracting portion, the leak preventive gather having a leak preventive base end edge serving as a standing fulcrum of the contracting portion outside the contracting portion in the width direction, and the waist. The first base end edge of the band may be located outside the leak preventive base end edge of the leak preventive gather in the width direction.

According to this aspect, the first proximal end edge of the waist band is likely to receive a force directed inward in the width direction due to the contraction of the standing portion. Since the first base edge of the waistband is located outside the leakproof base edge of the leak preventive gather in the width direction, it is possible to prevent the leak preventive base edge from moving inward in the width direction due to the contraction of the waist band. it can. A wide space can be provided between the pair of leak preventive gathers, and side leakage can be suppressed.

According to a preferred embodiment, the fastening tape may have a fastening tape arranged in the back waistline region, and the waist band may overlap the fastening tape in the thickness direction.

According to this aspect, the waist band can be interlocked and pulled when the fastening tape is pulled at the time of wearing. Therefore, the waist band becomes easier to stand up and the waist band is more easily formed.

(2) Overall Schematic Configuration of Disposable Diaper Hereinafter, the disposable diaper according to the first embodiment will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of respective dimensions and the like are different from actual ones. Therefore, specific dimensions should be determined in consideration of the following description. Further, the drawings may include portions having different dimensional relationships and ratios.

The disposable diaper is a tape-type disposable diaper. FIG. 1 is a schematic plan view of the disposable diaper 10 according to the first embodiment viewed from the skin facing surface side. FIG. 2 is a schematic cross-sectional view along the 2A-2A cross section of the disposable diaper shown in FIG. FIG. 3 is a schematic cross-sectional view taken along the line 3A-3A of the disposable diaper shown in FIG. 1 to 3 show the disposable diaper in an expanded state. The stretched state in the present invention is a state in which the disposable diaper 10 is stretched to a state in which wrinkles are not formed. In addition, the natural state in the present invention means, in the case of the disposable diaper 10 housed in the package, the disposable diaper 10 is taken out from the package, and the atmosphere is kept at 20° C.±2° C. and a relative humidity of 60%±5% RH. It is in a state of being left for 24 hours. FIG. 4 is a schematic cross-sectional view taken along the line 4A-4A shown in FIG. 1 in an expanded state. FIG. 5 is a schematic cross-sectional view taken along the line 4A-4A shown in FIG. 1 in a natural state . In the schematic cross-sectional views shown in FIGS . 2 to 5, the respective members are shown separated in the thickness direction T for convenience of description, but they are in contact with each other in the thickness direction T in an actual product. It is a figure which shows the wearing state based on the cross section shown in FIG. BL shown in FIG. 6 indicates the line of the wearer's body.

The disposable diaper 10 has a front-back direction L and a width direction W orthogonal to each other. The front-rear direction L is defined by the direction extending to the front side of the body and the back side of the body. In other words, the front-back direction L is a direction that extends in the front-back direction in the deployed disposable diaper 10. Further, the disposable diaper 10 has a thickness direction T orthogonal to both the front-rear direction L and the width direction W. The thickness direction T extends to the skin facing surface side T1 facing the wearer side and the non-skin facing surface side T2 opposite to the skin facing surface side.

The disposable diaper 10 has a front waistline region S1, a rear waistline region S2, and a crotch region S3. The front waistline region S1 is a region facing the front waistline (abdomen) of the wearer. The rear waistline region S2 is a region facing the rear waistline (back part) of the wearer, and includes a region on which the body (buttocks) is placed when worn. The crotch region S3 is a region located at the crotch of the wearer and arranged between the front waistline region S1 and the rear waistline region S2. The crotch region S3 is a region in which leg openings 65 arranged around the legs of the wearer are provided. The leg openings 65 are portions that are recessed inward in the width direction from the outer edge of the disposable diaper.

The disposable diaper 10 includes an absorbent core 31 that includes an absorbent material. The absorbent core 31 comprises an absorbent material such as ground pulp or super absorbent polymer (SAP), or a mixture thereof. The absorbent core 31 may be covered with a core wrap (not shown). The absorbent core 31 and the core wrap may form an absorbent body. The core wrap is made of a tissue or SMS non-woven fabric and may be arranged on the skin facing surface side T1 of the absorbent core 31 and the non-skin facing surface side T2 of the absorbent core 31.

As shown in FIGS. 2 and 3, the disposable diaper 10 includes the skin-side sheet 20 located on the skin-facing surface side T1 of the absorbent core 31. The skin-side sheet 20 covers the absorbent core 31 and is arranged over the entire disposable diaper 10. The skin side sheet 20 of the present embodiment includes a top sheet 21 and a pair of side sheets 22. In the disposable diaper having the core wrap, the skin-side sheet 20 is a sheet located on the skin-facing surface side T1 with respect to the core wrap. The topsheet 21 may be disposed across the center of the absorbent core 31 in the width direction W. The side sheets 22 may be arranged so as to cover both outer side portions of the topsheet 21. The topsheet 21 and the sidesheet 22 may be formed of a liquid-permeable sheet such as a nonwoven fabric or a perforated plastic film.

The inner portion of the side seat 22 may be folded back and overlapped. A leak-proof elastic member 61 that expands and contracts in the front-rear direction L may be provided between the overlapping side seats 22. The leak-proof elastic member 61 may be made of rubber thread that expands and contracts in the front-rear direction L. The side sheet 22 stands up on the skin-facing surface side T1 due to the contraction of the leak-proof elastic member 61. The side sheet 22 and the leak-proof elastic member 61 configure a contracting portion 63 that stands up on the skin facing surface side T1. The leak preventive gather 60 has a contracted portion 63 and a leak preventive base edge 64 that is an upright fulcrum of the contracted portion outside the contracted portion 63 in the width direction. The leak-proof base edge 64 is an inner edge of a region where the side sheet and the surface sheet are joined to each other outside the contracting portion 63 in the width direction. The contraction portion 63 is a portion in which the side sheet 22 is not joined to the topsheet 21 and can be contracted by the leak-proof elastic member 61, and does not include a portion in which the non-expanded leak-proof elastic member 61 is arranged. FIG. 1 shows the range of the contracting portion 63 in the front-rear direction.

Here, the outer portion in the present invention is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. In addition, the inner portion is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W.

The disposable diaper 10 has the non-skin surface side sheet 25 located on the skin facing surface side T1 with respect to the absorbent core 31. The non-skin side sheet 25 covers the absorbent core 31 and is arranged over the entire disposable diaper. The non-skin side sheet 25 of this embodiment includes a back sheet 23 and an exterior sheet 24. In the disposable diaper having the core wrap, the non-skin surface side sheet 25 is a sheet located closer to the non-skin facing surface side T2 than the core wrap. The back sheet 23 is a liquid-impermeable sheet, and is made of a polyethylene sheet, a laminated non-woven fabric mainly made of polypropylene or the like, a breathable resin film, a spun bond, a spun lace, or another non-woven fabric to which the breathable resin film is joined. A sheet or the like can be used. The exterior sheet 24 may be provided on the non-skin facing surface side T2 of the back sheet 23. The exterior sheet 24 may be made of a liquid-permeable nonwoven fabric. The length of the back sheet 23 in the width direction W is shorter than the length of the exterior sheet 24 in the width direction W, and the length of the back sheet 23 in the front-rear direction L is shorter than the length of the exterior sheet 24 in the front-rear direction L. Good.

A fastening tape 90 is provided in the rear waistline region S2. The fastening tape 90 has a base portion 92 and a locking portion 93. At least a part of the base portion 92 is joined between the skin-side sheet 20 and the non-skin-side sheet 25, and extends from the skin-side sheet 20 and the non-skin-side sheet 25 to the outside in the width direction W. .. The locking portion 93 is provided on the base portion 92 and is detachably fixed to the target portion 95 (see FIG. 1). The fastening tape 90 extends along the width direction W in the back waistline region S2 and is fixed to the target portion 95 to hold the disposable diaper 10 on the wearer's body. The target portions 95 are arranged in the front waistline region S1 and are configured such that the fastening tapes 90 are respectively attached thereto.

The disposable diaper 10 has a waist band 80 arranged on the skin facing surface side T1 of the skin surface side sheet 20 in the back waistline region S2. The waist band 80 floats from the skin-side sheet 20 when worn, and forms a pocket that opens toward the front side. The pocket accommodates excrement that moves toward the waist opening 66. The configuration of the waist band 80 will be described in detail later. The waist opening 66 is a portion that is constituted by the rear end edge 10R and the front end edge 10F of the disposable diaper and surrounds the waist in a state where the fastening tape 90 is fixed to the target portion 95.

The disposable diaper 10 includes a tape placement region R11 extending in the width direction from the fastening tape 90, a waist opening region R12 located rearward of the tape placement region R11, and a locking placement region extending in the width direction from the fastening portion 93 of the fastening tape. R13 and a waist region R14 located on the rear side of the locking arrangement region R13. The range in the front-rear direction L of each of the regions R11 to R14 is shown in FIG. The tape arrangement area R11 is an area between the front edge 90F and the rear edge 90R of the fastening tape in the front-rear direction L. Therefore, the front end edge of the tape placement region R11 matches the front end edge 90F of the fastening tape 90, and the rear end edge of the tape placement region R11 matches the rear end edge 90R of the fastening tape 90. The waist opening region R12 is a region between the rear end edge 90R of the fastening tape 90 and the rear end edge 10R of the disposable diaper 10 in the front-rear direction L. Therefore, the front edge of the waist opening region R12 corresponds to the rear edge 90R of the fastening tape, and the rear edge of the waist opening region R12 corresponds to the rear edge 10R of the disposable diaper 10. The locking arrangement region R13 is a region between the front end edge 93F and the rear end edge 93R of the locking portion 93 in the front-rear direction L. Therefore, the front end edge of the locking arrangement region R13 matches the front end edge 93F of the locking portion 93, and the rear end edge of the locking placement region R13 matches the rear end edge 93R of the locking portion 93. The waist region R14 is a region between the rear end edge 93R of the locking portion 93 and the rear end edge 10R of the disposable diaper 10 in the front-rear direction L. Therefore, the front edge of the waist region R14 corresponds to the rear edge 93R of the locking portion 93, and the rear edge of the waist region R14 corresponds to the rear edge 10R of the disposable diaper 10.

A leg elastic member 42 extending in the front-rear direction L may be provided between the side sheet 22 and the back sheet 23 or between the side sheet 22 and the exterior sheet 24. The leg elastic members 42 may be configured by a belt-shaped elastic sheet that expands and contracts in the front-rear direction L. By contraction of the leg elastic members 42, the disposable diaper 10 fits around the legs when worn. The leg elastic members 42 are arranged outside the absorbent core 31 in the width direction W along the leg openings 65 at least in the crotch region S3. The leg elastic members 42 are arranged between the exterior sheet 24 and the side sheets 22 and between the back sheet 23 and the side sheets 22.

A waist elastic member 45 extending in the width direction W may be provided between the side sheet 22 and the back sheet 23 and between the side sheet 22 and the exterior sheet 24. The waist elastic members 45 may be configured by a substantially rectangular elastic sheet that expands and contracts in the width direction W. The waist elastic member 45 is joined between the skin side sheet 20 and the non-skin side sheet 25. More specifically, as shown in FIG. 4, the waist elastic member 45 is stretched in the width direction W between the absorbent core 31 and the non-skin side sheet 25 or between the skin side sheet 20 and the non-skin side sheet 20. It is joined between the face side sheets 25. Due to the contraction of the waist elastic member 45, the disposable diaper 10 fits around the waist when worn. The waist elastic members 45 are arranged at least in the rear waistline region S2. The waist elastic member 45 is arranged so as to straddle the locking arrangement region R13 and the waist region R14. The rear end edge 45R of the waist elastic member 45 is located on the front side of the rear end edge 10R of the disposable diaper 10 and on the rear side of the tape placement region R11. The front end edge 45F of the waist elastic member 45 is located on the front side of the tape disposition region R11 and on the front side of the rear end edge 31R of the absorbent core 31. The waist elastic member 45 is arranged so as to overlap with either the skin side sheet 20 or the non-skin side sheet 25, and constitutes the reinforcing sheet of the present invention. The reinforcing sheet is a separate sheet from the skin side sheet 20 and the non-skin side sheet 25, and reinforces the region where the skin side sheet 20 and the non-skin side sheet 25 are arranged.

(3) Configuration of Waistband Next, the configuration of the waistband 80 will be described in detail. As shown in FIG. 5, the waist band 80 has a sheet layer 81 in which a plurality of sheets are laminated, and a band elastic member 82 joined to the sheet layer 81. The sheet layer 81 of the waistband 80 of the present embodiment includes a first nonwoven fabric layer 811, a second nonwoven fabric layer 812, and a film layer 813 arranged between the first nonwoven fabric layer 811 and the second nonwoven fabric layer 812. Including. The first non-woven fabric layer 811 and the second non-woven fabric layer 812 are made of the same non-woven fabric, and are folded back at the apex of the folded-back portion 86 of the waist band 80. The first nonwoven fabric layer 811 is located closest to the skin side sheet 20 side in the waist band 80.

The band elastic member 82 is composed of a thread-shaped or band-shaped elastic member, and is fixed to the sheet layer 81 in a state of being stretched in the width direction W. The band elastic member 82 of the present embodiment is fixed between the first nonwoven fabric layer 811 and the film layer 813. A plurality of band elastic members 82 are arranged at intervals in the front-rear direction L. A plurality of band elastic members 82 are arranged in each of a non-joint portion 85 and a folded portion 86 described later.

The waist band 80 may be arranged near the waist opening 66 in the back waistline region S2. The outer edge 80E of the waist band 80 may be located on the outer side in the width direction than the outer edge 31E of the absorbent core 31, and may be located on the inner side in the width direction than the inner edge of the fastening tape 90. The front edge 80F of the waist band 80 may be located rearward of the front edge 90F of the fastening tape 90. The disposable diaper 10 is between the front edge 90F of the fastening tape 90 and the front edge 80F of the waist band 80 in the front-rear direction L, and between the inner edge of the fastening tape and the outer edge of the absorbent core 31 in the width direction W. It has a separation region R15. The separation regions R15 may be located on both sides of the absorbent core 31 in the width direction. The one separation region R15 and the other separation region R15 may be arranged at intervals in the width direction W. In FIG. 1, the separated region R15 is shown by hatching.

The waist band 80 has an upright portion configured to be upright with respect to the skin-side sheet 20, and a base end edge serving as an upright fulcrum of the upright portion. The base end edge has a first base end edge located outside the absorbent core 31 in the width direction and a second base end edge located closer to the waist opening 66 than the upright portion.

The waist band 80 is configured to be stretchable in the width direction W. The waist band 80 may be configured to expand and contract in the width direction by the band elastic member 82, or may be configured to expand and contract in the width direction due to the sheet layer having elasticity. At least the standing portion of the waist band 80 may be configured to be contractible, and the entire standing portion, the first proximal end edge, and the second proximal end edge may be configured to be contractible.

The waist band 80 has a facing portion 83 that is located closest to the skin surface side sheet 20 side in the waist band 80. The facing portion 83 is a portion that can come into contact with the skin-side sheet 20, and includes the sheet layer 81 located closest to the skin-side sheet 20, and is a portion that is not folded back from the fold line. It is configured. The facing portion 83 of the present embodiment is a portion that is not folded back with respect to the fold FL, and is configured by a portion located on the skin facing surface side and the rear side of the fold FL. In FIG. 4, the facing portion 83 is shown by hatching. The facing portion 83 is provided with a joining portion 84 joined to the skin-side sheet 20 and a non-joining portion 85 extending from the joining portion 84 to the front side and not joined to the skin-side sheet 20. .. In FIG. 4, a length X in the front-rear direction of the joint portion 84 and a length Y in the front-rear direction L of the non-joint portion 85 are shown.

As shown in FIGS. 5 and 6, the accommodation space AS sandwiched between the non-bonded portion 85 of the waist band 80 and the skin-side sheet 20 forms a pocket that opens toward the front side. Therefore, the non-bonding portion 85 constitutes the rising portion of the present invention. The front end edge of the standing portion is the front end edge 85F of the non-joined portion 85, and the rear end edge of the standing portion is the rear end edge 85R of the non-joined portion 85. The front end edge 85F of the non-bonding portion 85 may be located on the front side of the rear end edge 31R of the absorbent core 31 in the extended state. The joint portion 84 extends rearward from the non-joint portion 85. The front end edge 84F of the joining portion 84 constitutes the second base end edge of the present invention. The joint portion 84 extends in the front-rear direction from the second base end edge. The trailing edge 84R of the joint portion 84 may extend to the trailing edge 80R of the waistband 80, and may match the trailing edge 10R of the disposable diaper 10. The front end edge 84F of the joint portion 84 constitutes the rear end edge of the pocket. In the extended state, the front end edge 84F of the joining portion 84 may be located rearward of the rear end edge 31R of the absorbent core 31, or may be aligned with the rear end edge 31R of the absorbent core 31. In the disposable diaper 10 of the present embodiment, the rear end edge 84R of the joint portion 84, the rear end edge 83R of the facing portion 83, the rear end edge 80R of the waist band, and the rear end edge 10R of the disposable diaper 10 are arranged in the front-rear direction L. The positions in are the same.

In the configuration in which the rear end edge 84R of the joint portion 84 is located on the front side of the rear end edge 80R of the waist band 80, the non-joint portion may be provided on the rear side of the joint portion 84. The non-joint portion located on the rear side of the joint portion 84 does not open toward the front side and does not form a pocket. Therefore, even if the sheet is erroneously cut due to an error in the manufacturing process described later, it does not affect the formation of the pocket. In addition, the non-bonding portion located on the rear side of the bonding portion 84 may be folded on the side away from the skin-side sheet 20 with the fold line extending in the width direction at the rear end edge of the non-bonding portion as a base point.

The waist band 80 has a side joint portion 87 joined to the skin-side sheet 20 on the outer side in the width direction with respect to the non-joint portion 85 forming the upright portion. The outer edge 87E of the side joint portion 87 may be disposed in the vicinity of the outer edge 80E of the waistband 80 and may reach the outer edge 80E of the waistband 80. The inner edge 87I of the side joint portion 87 may be located outside the outer edge 31E of the absorbent core 31 in the width direction W, and is separated from the absorbent core 31 in the width direction W. The inner edge 87I of the side joint portion 87 constitutes the first base end edge of the present invention. In FIG. 1, the non-joined portion 85, the side joined portion 87, and the joined portion 84 that form the rising portion are shown with different diagonal lines.

The non-bonded portion 85 extends from the bonded portion 84 to the front side. The waist band 80 may have a folded-back portion 86 that is folded around a fold FL extending in the width direction W at the front end edge 85F of the non-bonded portion 85 as a base point. The non-bonding portion 85 is provided from the front end edge 84F of the bonding portion 84 to the fold line FL. The front end edge 85F of the non-bonded portion 85 constitutes the front end edge 83F of the facing portion 83 and the front end edge 80F of the waist band 80, and coincides with the fold line FL. The length of the non-joined portion 85 in the front-rear direction L is the distance between the front edge 84F of the joined portion 84 and the fold line FL. As shown in FIG. 6, the folded-back portion 86 is folded on the side away from the skin-side sheet 20 and is a region in contact with the body. By providing the folded-back portion 86 in contact with the body, it becomes easier to secure the accommodation space by the pocket. The waistband 80 according to the modification may not have the folded-back portion 86.

The folded-back portion 86 extends rearward from the front end edge 85F of the non-bonded portion 85. In the extended state, the rear end edge 86R of the folded-back portion 86 may be aligned with the rear end edge 83R of the facing portion 83, may be on the front side of the rear end edge 83R of the facing portion 83, or may be opposite. It may be on the rear side of the rear end edge 83R of the portion 83. In the present embodiment, the rear end edge 86R of the folded portion 86 and the rear end edge 83R of the facing portion 83 are aligned in the front-rear direction L. In the configuration in which the rear end edge 86R of the folded-back portion 86 is located in front of the rear end edge 83R of the facing portion 83, the rear end edge 83R of the facing portion 83 configures the rear end edge 80R of the waist band 80. To do. In the configuration in which the rear end edge 86R of the folded-back portion 86 is located rearward of the rear end edge 83R of the facing portion 83, the rear-end edge 86R of the folded-back portion 86 configures the rear end edge 80R of the waist band 80. ..

As shown in FIGS. 2 and 3, the outer side portion of the folded-back portion 86 is joined to the unfolded portion of the waistband (the facing portion 83) via the second joining portion 88. The second joint portions 88 are provided in a pair on both sides of the folded portion 86 in the width direction. In the region between the pair of second joint portions 88, the folded-back portion 86 stands upright on the wearer side with respect to the facing portion 83.

The waist band according to the modified example may be folded to the side away from the skin-side sheet 20 with the fold line extending in the width direction W at the rear end edge 86R of the folded-back portion 86 as the base point. When the folded-back portion 86 is further folded, the waist band 80 stands up on the wearer side more easily, and the waist band 80 becomes easier to contact the body.

The front end edge 80F of the waistband 80 may be located in the tape disposition region R11 or the locking disposition region R13 in the extended state. That is, the front edge 80F of the waist band 80 may be located in front of the front edge of the waist region R14 or may be located in front of the front edge of the waist opening region R12.

The rear end edge 80R of the waist band 80 is arranged rearward of the center R14CL of the waist region R14 in the front-rear direction in the stretched state. The waist region R14 is located rearward of the locking arrangement region R13. The locking arrangement region R13 is a region that holds the disposable diaper 10 against the body in a state where the locking portion 93 is fixed to the target portion 95 when worn. The waist region R14 located on the rear side of the locking arrangement region R13 is less likely to receive a force for holding the wearer's waistline with the fastening tape 90 or the like, and the waist region R14 is relatively easily deformed in the rear waistline region S2. Area. The rigidity of the waist region R14 can be increased by disposing the waist band 80 in the waist region R14. The waist band 80 is arranged at least half the length of the waist region R14 in the front-rear direction L. Therefore, the rigidity is increased over the length of the waist region R14 in the front-rear direction L of half or more, and the rigidity of the waist region R14 is easily secured. It is possible to suppress problems such as the waist region R14 being turned over, and to suppress back leakage.

The pocket of the waist band 80 is formed by the accommodation space AS sandwiched between the non-bonding portion 85 of the facing portion 83 and the skin-side sheet 20. A joint portion 84 is provided closer to the waist opening 66 than the non-joint portion 85. Since the non-bonded portion 85 is provided on the front side of the bonded portion 84, even if a part of the waist band 80 (for example, the rear end edge of the waist band 80) is erroneously cut due to manufacturing error or the like, the pocket is cut. Hard to be done. Therefore, the function as a pocket can be easily maintained, the pocket by the waist band 80 can be appropriately formed, and the occurrence of post-leakage can be suppressed.

The rear end edge 80R of the waist band 80 may be disposed rearward of the center R12CL of the waist opening region R12 in the front-rear direction L in the stretched state. The waist opening region R12 is located rearward of the tape placement region R11. The tape placement area R11 is an area for holding the disposable diaper against the body in a state where the fastening tape 90 is fixed to the target portion 95 when worn. The waist opening region R12 located on the rear side of the tape placement region R11 is less likely to receive a force for holding the wearer's waistline, and the waist opening region R12 is a region that is more easily deformed in the rear waistline region S2. In addition, when the disposable diaper configured as described above is worn on the wearer in a sleeping state, the back waistline region S2 may be inserted between the wearer's body and the bedding or the like. At this time, the waist opening region R12 is located at the tip when inserted, and is a region where it is easy to turn up and down. By arranging the waist band 80 in the waist opening region R12, the rigidity of the waist opening region R12 can be increased. The waist band 80 is arranged at least half the length of the waist opening region R12 in the front-rear direction L. Therefore, the rigidity is increased over the length of the waist opening region R12 that is more than half in the front-rear direction L, and the rigidity of the waist opening region R12 is easily secured. Problems such as the waist opening region R12 being turned over can be suppressed, and post-leakage can be suppressed.

Suitably, the rear end edge 84R of the joint portion 84 may be disposed rearward of the center R14CL of the waist region R14 in the front-rear direction in the stretched state. The joint portion 84 is a region joined to the skin-side sheet 20 and can further increase the rigidity of the waist region R14. Therefore, it becomes easier to obtain the effect of increasing the rigidity of the waist region R14 and suppressing post-leakage. More preferably, the rear end edge 84R of the joint portion 84 may be arranged rearward of the center R12CL of the waist opening region R12 in the front-rear direction in the stretched state. The effect of increasing the rigidity of the waist opening region R12 and suppressing post-leakage becomes easier to obtain. More preferably, the rear edge 84R of the joint portion 84 may reach the rear edge 10R of the disposable diaper 10 in the extended state. The rigidity of the rear end edge 10R of the disposable diaper 10 can be increased, and the rigidity of the waist opening region R12 can be more easily ensured. Problems such as the waist opening region R12 being turned over can be suppressed, and post-leakage can be further suppressed.

The rear end edge 85R of the non-bonding portion 85 may be located rearward of the center of the locking arrangement region R13 in the front-rear direction L in the extended state. The rear end edge 85R of the non-bonded portion 85 constitutes the rear end edge of the pocket sandwiched between the non-bonded portion 85 of the facing portion 83 and the skin-side sheet 20. The length of the non-bonded portion 85 in the front-rear direction L can be secured, and a large pocket accommodation space can be provided by the non-bonded portion 85.

The front end edge 84F of the joining portion 84 may be located on the front side of the rear end edge of the locking arrangement region R13 in the extended state. The length of the joining portion 84 in the front-rear direction L can be secured, and the rigidity of the region where the waistband 80 is arranged can be further increased. Therefore, it is possible to further suppress the problem that the waist region R14 and the like are turned over, and further suppress the back leakage.

Further, the waist elastic member 45 as the reinforcing sheet may be arranged in the waist region R14. More preferably, the waist elastic members 45 may be arranged in a half or more of the length of the waist region R14 in the front-rear direction L. Therefore, the rigidity is increased over the length of the waist region R14 in the front-rear direction L of half or more, and the rigidity of the waist region R14 is easily secured. It is possible to suppress problems such as the waist region R14 being turned over, and to suppress back leakage. Further, the waist elastic member 45 as the reinforcing sheet may be arranged in the waist opening region R12. Problems such as the waist opening region R12 being turned over can be suppressed, and post-leakage can be suppressed.

The waist elastic member 45 may be disposed so as to straddle the left and right fastening tapes 90. A region having high rigidity is continuously provided in the width direction by the fastening tape 90 and the waist elastic member 45. Therefore, it is possible to suppress the swelling in the vicinity of the waist opening in the rear waistline region and to further suppress the leakage in the rear waistline region.

A waist elastic member 45 as a reinforcing sheet may be provided in the separated region R15 of the disposable diaper. A region between the waist band 80 and the fastening tape 90 in the width direction W is reinforced by the waist elastic member 45, and the fastening tape 90 and the waist band 80 are easily interlocked. Therefore, when the fastening tape 90 is pulled outward in the width direction W, the waist band 80 is interlocked and pulled in the width direction W, and the waist band 80 is easily lifted from the skin-side sheet 20. It becomes easy to form a pocket by the waist band 80.

Further, the front edge 80F of the waist band 80 is located closer to the waist opening 66 side than the front edge 90F of the fastening tape 90, and in the worn state, the waist band 80 can easily cover the buttocks, and the excrement from the buttocks can be easily accommodated. .. At this time, the region between the front end edge 80F of the waist band 80 and the front end edge 90F of the fastening tape 90 is reinforced by the waist elastic member 45, is not easily deformed, and wrinkles are less likely to occur. Therefore, it is possible to prevent the waist band 80 from being pulled down toward the crotch side due to the deformation between the front end edge 80F of the waist band 80 and the front end edge 90F of the fastening tape 90 in the front-rear direction L. Therefore, the buttocks can be continuously covered by the waist band 80, and post-leakage can be suppressed.

In addition, the waist elastic member 45 may be disposed in at least a part of the separated region R15. Preferably, the length in the width direction W of the waist elastic member 45 arranged in the separated region R15 may be ½ or more of the length in the width direction W of the separated region R15. That is, in each of the separated regions R15, the waist elastic member 45 may be arranged over ½ or more of the length of the separated region R15 in the width direction W. Further, the length in the front-rear direction L of the waist elastic member 45 arranged in the separation region R15 may be ½ or more of the length in the front-rear direction L of the separation region R15. That is, in each of the separated regions R15, the waist elastic member 45 may be arranged over ½ or more of the length of the separated region R15 in the front-rear direction L. By the waist elastic member 45, the rigidity of the separated region R15 can be further enhanced, the waist band 80 can be further suppressed from being pulled down to the crotch side, and the waist band 80 can be more easily raised by being interlocked with the fastening tape 90. In the present embodiment, the waist elastic members 45 are arranged in the entire separation region R15, and deformation of the entire separation region R15 can be suppressed.

At least a part of the waist elastic member 45 as the reinforcing sheet may be stretchable in the width direction W. Since the waist elastic member 45 expands and contracts in the width direction W, the interlocking property between the fastening tape 90 and the waist band 80 at the time of wearing can be enhanced. Further, when the wearer is in the forward bending posture, the waist elastic member 45 extends so that the back waistline region S2 follows the body and the back waistline region S2 can continue to fit the body. In addition, the part of the wearer to which the separation region R15 is applied is the part above the bulge of the buttocks of the wearer, and is the part where the body is recessed. Moreover, since the absorbent core 31 is not arranged in the separated region R15, a gap with the body is likely to occur. By contracting at least a part of the separated region R15 where the gap is likely to occur by the waist elastic member 45, the rear waistline region S2 fits the body, and it is possible to suppress the generation of the gap between the body and the diaper. The reinforcing sheet may have elasticity over the entire area. In the modification, the reinforcing sheet does not have to have elasticity.

The waist elastic member 45 may overlap the waist band 80 in the thickness direction T. The waist elastic member 45 and the waist band 80 are more easily interlocked with each other, and when the fastening tape 90 is pulled at the time of wearing, the waist band 80 is interlocked and pulled by the waist elastic member 45. It becomes easier to form pockets.

The waist elastic member 45 may overlap at least a part of the waist band 80, and preferably, may overlap the entire area of the waist band 80. A force pulled in the width direction W can be transmitted over the entire width direction W of the waist band 80. Further, the waist band 80 stands up on the wearer side with respect to the skin-side sheet 20 and the waist elastic members 45 in the thickness direction T. The rigidity of the waist band 80 on the base side at the time of standing is increased, and the waist band 80 becomes easier to stand up on the wearer side.

Further, the waist elastic member 45 may overlap the fastening tape 90 in the thickness direction T. When the fastening tape 90 is pulled at the time of mounting, a force pulling outward in the width direction W is easily applied to the waist elastic member 45. The waist band 80 can be interlocked and pulled via the waist elastic member 45, and it becomes easier to form a pocket by the waist band 80. The waist elastic member 45 may overlap at least a part of the base portion 92 of the fastening tape 90.

The waist elastic member 45 may extend to the front side of the front end edge 90F of the fastening tape 90. The region on the crotch side of the fastening tape 90 is easily deformed due to the force applied by the wearer's movement. Even in the region on the crotch region side of the fastening tape 90, the waist elastic member 45 can increase the rigidity and suppress the deformation.

The area of the region where the waist band 80 and the waist elastic member 45 overlap may be larger than the area of the region where the fastening tape 90 and the waist elastic member 45 overlap. The fastening tape 90 is arranged in the same layer as the waist elastic member 45 in the thickness direction T, and the fastening tape 90 and the waist elastic member 45 are relatively easy to interlock. On the other hand, the waist band 80 is arranged on the skin facing surface side of the skin side sheet 20, and is arranged in the thickness direction T so as to be displaced from the waist elastic member 45. By increasing the area of the region where the waist band 80 and the waist elastic member 45 overlap, the interlocking property between the waist elastic member 45 and the waist band 80 can be enhanced.

The distance between the rear edge 90R of the fastening tape 90 and the front edge 80F of the waist band 80 may be shorter than the distance between the front edge 90F of the fastening tape 90 and the front edge 80F of the waist band 80. That is, the front end edge 80F of the waist band 80 is located rearward of the center of the fastening tape 90 in the front-rear direction L (the center of the tape placement area). By disposing the waist band 80 near the waist opening 66 side, it becomes easier to cover the buttocks and leakage of excrement can be suppressed. Further, since the separated region R15 can be reinforced by the waist elastic member 45, even if the waist band 80 is arranged near the waist opening 66 side, it is possible to suppress the waist band 80 from being pulled down to the crotch side, and the waist band The pocket with 80 can continue to be placed on the upper side of the buttocks.

The waist elastic members 45 may be arranged in a region that does not overlap the leg elastic members 42 in the thickness direction T. It is possible to suppress the waist elastic member 45 from bouncing due to the contraction of the leg elastic member 42, and it is easier to obtain the effect of suppressing the deformation of the separated region R15 by the waist elastic member 45.

The waist elastic member 45 may be arranged in a region extending rearward from the rear end edge 42R of the leg elastic member 42 along the front-rear direction L. The region extending rearward from the rear end edge of the leg elastic member 42 along the front-rear direction L is the rear end edge 42R of the leg elastic member 42 arranged in the extended state (the leg elastic arranged in the non-extended state). It is a region that extends rearward along the front-rear direction L from (excluding members). FIG. 1 shows a rear end edge 42R of the leg elastic member 42 arranged in an extended state. The region extending from the rear end edge of the leg elastic member 42 to the rear side is likely to be pulled down to the crotch region side due to the contraction of the leg elastic member 42. A region extending rearward from the rear end edge 42R of the leg elastic member 42 along the front-rear direction L is reinforced by the waist elastic member 45 and difficult to be pulled down to the crotch region side. It is possible to prevent the waist band 80 from pulling down to the crotch side. Therefore, the buttocks can be continuously covered by the waist band 80, and post-leakage can be suppressed.

The waist elastic member 45 may overlap the base end edge of the waist band 80 in the thickness direction T. In the present embodiment, the waist elastic member 45 overlaps the inner edge 87I of the side joint portion 87 serving as the first base end edge and the front end edge 84F of the joint portion 84 serving as the second base end edge. The waist elastic member 45 may overlap at least a part of the base end edge of the waist band 80, and preferably overlaps the entire base end edge of the waist band 80. When the fastening tape 90 is pulled at the time of wearing, the proximal end edge of the waist band 80 can be pulled in conjunction with the waist elastic member 45. By pulling the base end edge of the waist band 80, it becomes easier to stand up than the upright portion of the waist band 80, and it becomes easier to form a pocket by the waist band 80.

The waist elastic member 45 may be disposed so as to straddle the one separation region R15 and the other separation region R15. Both the one separation region R15 and the other separation region R15 can be reinforced by the one waist elastic member 45. Further, the waist elastic member 45 continuous in the width direction W is arranged in the region between the left and right fastening tapes 90, and the interlocking property of the left and right fastening tapes 90 can be enhanced. Therefore, the rear waistline region S2 fits more to the body, and the gap between the body and the diaper can be suppressed.

The waist band 80 may be arranged in a region that does not overlap the contracted portion 63 of the leak preventive gather 60 in the thickness direction T. It is possible to suppress the waist elastic member 45 from bouncing due to the contraction of the contraction portion 63, and it is easier to obtain the effect of suppressing the deformation of the separated region R15 by the waist elastic member 45.

The tensile load in the width direction W of the waist band 80 may be lower than the tensile load in the width direction W of the waist elastic member 45. When it is pulled outward in the width direction W at the time of wearing, the waist band 80 extends first, and then the waist elastic member 45 extends. The waist band 80 is easily stretched and more easily stands up on the body side. Therefore, the waist band 80 fits more to the body, and post leakage can be further suppressed.

The tensile load of the leg elastic members 42 in the front-rear direction L may be lower than the tensile load of the waist elastic members 45 in the width direction W. When wearing a tape-type diaper, with the wearer's back resting on the back waistline S2, pull the front waistline while applying the crotch area between the wearer's legs, and pull the abdomen with the front waistline. cover. When the diaper is pulled during wearing, the leg elastic members 42 expand first, and then the waist elastic members 45 expand. The leg elastic members 42 are easily stretched, and are more easily fitted around the legs of the wearer. The leg elastic members 42 can be fitted to the body and lateral leakage can be suppressed.

The tensile load of the leg elastic members 42 in the front-rear direction L may be lower than the tensile load of the waist band 80 in the width direction W. The leg elastic member 42 is easily stretched when worn, and fits more around the leg of the wearer, and lateral leakage can be suppressed. Also, the waist band 80 has a relatively high tensile load and is difficult to stretch. Therefore, the waist band 80 is less stretched than the elastic members around the legs, and the position thereof in the front-rear direction L is less likely to shift. Therefore, it is possible to prevent the waist band 80 from shifting to the crotch side when the leg elastic members 42 are extended, and to fit the leg elastic members 42 around the legs while maintaining the position of the waist band 80 in the front-rear direction. Therefore, both lateral leakage and post-leakage can be suppressed.

The tensile load of the waist band 80 in the width direction W, the tensile load of the waist elastic members 45 in the width direction W, and the tensile load of the leg elastic members 42 in the front-rear direction L can be measured as follows. The disposable diaper is disassembled using cold spray, the waist band 80, the waist elastic member 45, and the leg elastic member 42 are taken out to prepare a sample. It is fixed between chucks of a tensile tester (for example, "RTA-100" manufactured by Orientec Co., Ltd.). The initial length of the sample is the natural state. Then, the sample fixed between the chucks is elongated until the length becomes 1.5 times the length in the initial state, and the load at that time is taken as the tensile load at the time of 1.5 times extension.

The disposable diaper 10 may satisfy S≧Y, where S is the distance between the first proximal end edge and the absorbent core 31 in the width direction W in the stretched state, and Y is the length in the front-rear direction of the standing portion in the stretched state. .. As shown in FIG. 2, S is the distance in the width direction W between the inner edge 87I of the side joint portion 87 and the outer edge 31E of the absorbent core 31 in the stretched state. As shown in FIG. 4, Y is the length in the front-rear direction of the unbonded portion 85 in the stretched state. The non-joint portion 85 serving as the standing portion of the waist band 80 is configured to stand upright with respect to the front end edge 84F of the joint portion 84 and the inner edge 87I of the side joint portion 87, and forms a storage space for storing excrement. To do. At this time, since the distance S between the side joint portion 87 and the absorbent core 31 in the width direction W is equal to or longer than the length Y of the non-joint portion 85 in the front-rear direction L, the accommodation space AS standing upright with respect to the outer edge 31E of the absorbent core 31. It is possible to form the pockets such that the height of the pocket is equal to or higher than the height of the accommodation space AS that rises with respect to the joint portion 84. Therefore, the outer edge of the accommodation space does not easily rise due to the rigidity of the absorbent core 31, the entire accommodation space easily rises, and the accommodation space is easily secured. It is possible to secure an accommodation space for the pocket by the waist band 80 and suppress the occurrence of post-leakage.

The disposable diaper 10 may satisfy S≦Y+U, where U is the distance in the front-rear direction between the rear end edge of the absorbent core 31 and the second base end edge in the extended state. As shown in FIG. 4, U is the distance in the front-rear direction L between the rear end edge 31R of the absorbent core 31 and the front end edge 84F of the joint portion 84 in the stretched state. Since the front end edge 84F of the joint portion 84 is located rearward of the rear end edge 31R of the absorbent core 31, the front end edge 84F of the joint portion 84 further rises toward the wearer side with respect to the rear end edge 31R of the absorbent core 31. Sometimes. At this time, the rising height of the accommodation space is Y+U. Since the height of the accommodation space by S is equal to or lower than the height of the rising of the accommodation space by Y+U, the height of the rising of the accommodation space by Y+U can be suppressed. The region between the absorbent core 31 and the joint portion 84 is located between the upright fulcrum of the waist band 80 and the absorbent core 31, has a lower rigidity than both sides in the front-rear direction, and is easily deformed. By satisfying S≦Y+U, it is possible to prevent the region between the absorbent core 31 and the joint portion 84 from being deformed due to the rising height of the accommodation space by Y+U being too high, and to secure the accommodation space for the pocket. Easy to do.

In the disposable diaper 10, the front end edge 85F of the non-bonding portion 85 is located on the front side of the rear end edge 31R of the absorbent core 31, and the rear end edge 31R of the absorbent core 31 in the extended state and the front end edge of the standing portion in the front-back direction. If the distance is V, V≧U may be satisfied. As shown in FIG. 4, V is the distance in the front-rear direction L between the rear end edge 31R of the absorbent core 31 and the front end edge 85F of the non-bonding portion 85 in the stretched state. In the form in which the waistband and the absorbent core are overlapped with each other, the distance V in the front-rear direction L between the rear end edge 31R of the absorbent core 31 and the front end edge 85F of the non-bonded portion 85 in the stretched state is such that The length of the overlapping area in the front-rear direction. The length (V) in the front-rear direction of the region where the absorbent core 31 overlaps in the standing portion is equal to or longer than the length (U) in the front-rear direction of the region where the absorbent core 31 does not overlap in the standing portion. In the area where the absorbent core overlaps in the standing portion, the absorbent core having higher rigidity is located on the non-skin facing surface side than in the area where the absorbent core does not overlap, and it is easier for the wearer to stand up. By satisfying V≧U, the standing portion becomes easier to stand up.

Moreover, in the modification, the disposable diaper 10 may satisfy|fill U>V so that the front end edge 85F of the non-bonding part 85 is located in front of the rear end edge 31R of the absorbent core 31. The length (U) in the front-rear direction L of the region where the absorbent core 31 does not overlap in the standing portion is longer than the length (V) in the front-rear direction L of the region where the absorbent core 31 overlaps in the standing portion. That is, the length in the front-rear direction L of the standing portion arranged on the rear side of the rear end edge 31R of the absorbent core 31 is larger than the length of the standing portion arranged on the front side of the rear end edge of the absorbent core in the front-rear direction. Is also long. Therefore, the waist band pocket can be formed larger on the rear side than the rear edge 31R of the absorbent core 31. The user can recognize that the pocket of the waist band 80 is arranged larger than the absorbent core on the rear side, and can feel a sense of security against the leakage.

A reinforcing sheet may be provided in a region (region U shown in FIG. 4) between the rear end edge 31R and the second base end edge of the absorbent core 31 in the stretched state. In the present embodiment, a waist elastic member 45 as a reinforcing sheet is arranged. The rigidity of the region between the rear end edge 31R of the absorbent core 31 and the front end edge 84F (second base end edge) of the joint portion 84 is increased by the reinforcing sheet, and the region where the absorbent core overlaps in the standing portion (V shown in FIG. 4). The difference in rigidity with the area (1) can be reduced. Therefore, the entire standing portion can be easily raised.

Further, in the form in which the front end edge 85F of the non-bonded portion 85 is located on the rear side of the rear end edge 31R of the absorbent core 31, U (the rear end edge 31R of the absorbent core 31 in the stretched state and the bonded portion 84). The distance in the front-rear direction L from the front end edge 84F is Y (the length in the front-rear direction of the standing portion in the stretched state)+V (in the front-back direction of the rear end edge 31R of the absorbent core 31 in the stretched state and the front end edge of the standing portion). Distance). In this form, the entire pocket of the waistband is arranged on the rear side of the absorbent core, so that the user can further feel a sense of security against post-leakage.

Even in the form in which the front end edge 85F of the non-bonding portion 85 is located rearward of the rear end edge 31R of the absorbent core 31, a region between the rear end edge 31R of the absorbent core 31 and the second base end edge in the extended state. A reinforcing sheet may be provided in the. The rigidity of the non-skin surface side of the waist band can be increased and the rise of the waist band can be stabilized.

The waist elastic member 45 may be arranged in at least a part of the region between the rear end edge 31R of the absorbent core 31 and the front end edge 84F (second base end edge) of the joint portion 84, and is preferable. It may be arranged in the entire front-rear direction between the rear end edge 31R of the absorbent core 31 and the front end edge 84F (second base end edge) of the joint portion 84. Further, the waist elastic members 45 may be arranged in the entire area of the waist band 80 in the width direction Q. The reinforcing sheet increases the rigidity over the entire width of the waist band in the width direction, and the upright portions are easily raised over the entire width of the waist band.

The disposable diaper 10 may satisfy U≦X, where X is the length of the joint portion 84 in the front-rear direction. When the disposable diaper is worn on a sleeping wearer, the back waistline region S2 may be inserted between the wearer's body and the bedding or the like. At this time, since the length of the joint portion 84 in the front-rear direction is long, the rigidity of the joint portion 84 is increased, and the front end edge 84F of the joint portion 84, which serves as the upright fulcrum of the upright portion, can be prevented from rolling up. Further, even if the front end edge 84F of the joining portion 84 is bent up, the length of the joining portion 84 in the front-rear direction is long, so that the upright fulcrum of the upright portion can be easily secured. Therefore, it is easy to maintain the starting point fulcrum of the standing portion, and it is easier to secure the accommodation space of the pocket by the waist band 80. Further, the waist elastic member 45 as the reinforcing sheet may be disposed across the front end edge 84F of the joint portion 84 that serves as the upright fulcrum of the upright portion in the front-rear direction. It is possible to prevent the front end edge 84F of the joint portion 84, which serves as an upright fulcrum of the upright portion, from buckling.

The length of the folded portion 86 in the front-rear direction L may be longer than the length of the non-bonding portion 85 in the front-rear direction L in the extended state. The length of the folded portion 86 in contact with the body in the front-rear direction is longer than the length of the non-joined portion 85 that forms the accommodation space of the pocket. It is possible to secure a large area in which the waist band 80 contacts the body, improve the stability of the shape of the waist band 80, and suppress the formation of a gap between the waist band 80 and the body. Further, by increasing the length of the folded-back portion 86 in the front-rear direction, even if the contracted force of the folded-back portion 86 is increased, the contractile force per unit length can be suppressed. Therefore, the adhesion of the waist band 80 can be secured while suppressing the pressure applied to the folded-back portion 86 and suppressing the deterioration of the wearing feeling.

The rear end edge 86R of the folded-back portion 86 may be located rearward of the locking arrangement region R13 in the extended state. The locking arrangement region R13 easily adheres to the body when worn. The folding|returning part 86 is arrange|positioned rather than the locking arrangement|positioning area|region R13 which sticks to the said body, at the waist opening 66 side. The user can understand that the pocket is arranged near the waist opening 66, and can feel a sense of safety against the leakage.

The inner edge 87I of the side joint portion 87 of the waist band 80 may be located outside the leak-proof base end edge 64 of the leak-proof gather 60 in the width direction W. The inner edge 87I of the side joint portion 87 is likely to receive an inward force in the width direction W due to the contraction of the standing portion. Since the inner edge 87I of the side joint portion 87 is located on the outer side in the width direction W than the leak preventive base edge 64 of the leak preventive gather 60, the leak preventive base edge 64 is inward in the width direction W due to the contraction of the waist band 80. Can be restrained from moving to. A wide space can be provided between the pair of leak-proof gathers, and side leakage can be suppressed.

The contraction force of the folded-back portion 86 may be higher than the contraction force of the non-bonding portion 85. Since the expansion/contraction stress of the folded-back portion 86 is relatively high, it is possible to secure the adhesion of the waist band 80 to the body. Further, since the stress in the region where the non-bonding portion 85 is provided is relatively low, it is possible to prevent the pocket from rising too much from the body due to the high stress in the non-bonding portion 85, and to prevent the gap between the body and the pocket from occurring. Can be suppressed.

The shrinkage force of the joint portion 84 may be lower than the shrinkage force of the non-joint portion 85 that constitutes the rising portion. Since the shrinkage force of the joint portion 84 is low, the joint portion 84 is less likely to come into close contact with the body than the non-joint portion 85. Since the joint portion is in close contact with the body, it is possible to suppress a problem that the standing portion that does not overlap the joint portion 84 is relatively separated from the body. Therefore, it is easy to secure the adhesion of the standing portion to the body. Further, as shown in FIG. 6, the folded-back portion 86 also stands up on the wearer side together with the non-joined portion 85. At this time, the folded-back portion 86 in a region that does not overlap with the joint portion 84 does not adhere to the body together with the joint portion 84, the uprightness of the folded-back portion 86 can be maintained, and a pocket accommodation space can be secured. In addition, in the folded portion 86 in the region overlapping the joint portion 84, it is easy to adhere to the body together with the joint portion 84, and it is easy to secure the adherence to the body.

An autograph type tensile tester (eg, AG-1KN1) manufactured by Shimadzu Corporation may be used to measure the shrinkage force of the folded portion 86, the shrinkage force of the joint portion 84, and the shrinkage force of the non-joint portion 85. it can. First, in a state in which the disposable diaper is extended to such an extent that wrinkles due to the contraction action of the waistband 80 are extended, the widthwise dimension W of the folded portion 86, the widthwise dimension W of the joint portion 84, and the non-joint portion 85 of the joint portion 85. After measuring the dimension in the width direction W in advance (initial dimension), the waist band 80 was cut, and the folded portion 86, the joint portion 84, and the non-joint portion 85 were cut out to obtain a sample.

Next, one end of each sample is sandwiched by a fixed chuck and the other end is sandwiched by a movable chuck, and the sample is stretched at a speed of 300 mm/min to a size of about 90% of the initial size and then inverted, and the sample is rotated about 75% of the initial size. The tensile load (N) when contracted to the size was obtained and converted into the stress value (N/mm) per unit width (mm) to obtain the contraction force.

Further, in the modified example, the rear end edge 86R of the folded-back portion 86 may be located on the front side of the rear end edge 84R of the joint portion 84 in the extended state. Since the rear end edge 86R of the folded-back portion 86 is located on the front side of the rear end edge 84R of the joint portion 84, the folded-back portion 86 is unintentionally cut even if the folded-back portion 86 is displaced during manufacturing. Can be suppressed. Unintentionally cutting the folded-back portion 86 can prevent the cut pieces of the waist band 80 from being generated.

In another modification, the waist band 80 may overlap the fastening tape 90 in the thickness direction T. When the fastening tape 90 is pulled at the time of wearing, the waist band 80 can be pulled together. Therefore, the waist band 80 becomes easier to stand up, and the pocket formed by the waist band 80 becomes easier to form.

Next, a disposable diaper 10Z according to the second embodiment will be described based on FIGS. 7 and 8. FIG. 7 is a sectional view in a section corresponding to FIG. 4 in the first embodiment, and FIG. 8 is a sectional view in a section corresponding to FIG. 5 in the first embodiment. FIG. 7 shows a stretched state, and FIG. 8 shows a natural state. The disposable diaper 10Z of the second embodiment is different from the disposable diaper 10 of the first embodiment in the configuration of the waist band 80. In the description of the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The waist band 80Z of the second embodiment has a folded-back portion 86 folded at the rear end edge of the joint portion 84 with the fold line FL1 extending in the width direction W as a base point. The facing portion 83 is provided with only the joint portion 84. The non-joined portion of the first embodiment is not provided on the front side of the joined portion 84. In addition, in the modification of the second embodiment, a non-bonding portion may be provided on the front side of the bonding portion 84. The waist band 80Z is configured such that the folded-back portion 86 can stand upright with respect to the facing portion 83. The folding|returning part 86 comprises the rising part of this invention, and the fold FL1 comprises the 2nd base end edge of this invention. Further, the outer side portion of the folded-back portion 86 is joined to the skin-side sheet 20 or the facing portion 83 via the second joining portion. The position of the second joint portion in plan view is the same as that in the first embodiment. The accommodation space AS sandwiched between the folded-back portion 86 of the waist band 80Z and the skin-side sheet 20 and the accommodation space AS sandwiched between the folded-back portion 86 and the facing portion 83 form a pocket opening toward the front side. There is. In the waist band 80Z, the folded-back portion 86 can rise up from the fold line FL1 as a base point, and the facing portion 83 can rise up from the front end edge 84F of the joint portion 84 as a base point.

As shown in FIG. 7, the length Y in the front-rear direction of the standing portion in the extended state in the second embodiment is the length of the folded-back portion 86 in the front-rear direction L. The front-rear direction distance U between the rear end edge of the absorbent core and the second base end edge in the extended state in the second embodiment is the front-rear distance between the rear end edge 31R of the absorbent core 31 and the fold FL1. The distance V in the front-rear direction between the rear end edge of the absorbent core and the front end edge of the standing portion in the second embodiment is the distance in the front-rear direction between the rear end edge 31R of the absorbent core 31 and the front end edge 86F of the folded portion 86. Also in the disposable diaper according to the second embodiment, S≧Y may be satisfied, S≦Y+U may be satisfied, V≧U may be satisfied, or U≦X may be satisfied. The distance S in the width direction W between the first base end edge and the absorbent core in the second embodiment is the same as the distance S in the first embodiment.

The waist band 80Z according to the second embodiment may be further folded on the side away from the skin-side sheet 20 with the front end edge of the folded-back portion 86 as a base point. A portion of the folded-back portion 86, which is folded around the front end edge as a base point, is likely to be in close contact with the body like the folded-back portion of the first embodiment. Therefore, the close contact of the waist band 80Z with the body can be ensured, and post leakage can be further suppressed.

The front end edge 80F of the waistband 80Z according to the second embodiment is configured by the front end edge 86F of the folded portion 86. Therefore, the range in the front-rear direction of the separated region R15 is between the front end edge of the fastening tape 90 and the front end edge 86F of the folded portion 86. Although not shown, the front end edge of the fastening tape 90 is located on the front side of the front end edge 86F of the folded-back portion 86. Further, the waist elastic member 45 extends to the front side of the front end edge 86F of the folded portion 86. Therefore, also in the second embodiment, the waist elastic member 45 can increase the rigidity of the separated region R15 and suppress the deformation of the separated region R15. Therefore, it is possible to suppress the waist band 80Z from being deformed toward the crotch region S3 side, continue to cover the buttocks, and suppress back leakage. Further, the outer side portion of the folded-back portion 86 is joined to the skin-side sheet 20 via the second joining portion. Therefore, when the fastening tape 90 is pulled outward in the width direction W during mounting, the outer portion of the waist band 80Z is pulled through the waist elastic member 45 and the skin surface side sheet 20, and the waist band is the skin surface side. It becomes easy to lift up from the seat 20. It becomes easy to form a pocket by the waist band 80Z.

In addition, preferably, the waist elastic member 45 absorbs between the front edge of the fastening tape 90 in the front-rear direction and the front edge of the facing portion of the waist band 80Z, and the inner edge of the fastening tape 90 in the width direction W. It may be located in the second spacing region R16, which is between the outer edges of the core. The spacing region R15 and the second spacing region R16 have the same range in the width direction W but different ranges in the front-rear direction. In FIG. 7, the range in the front-rear direction of the separated region R15 and the second separated region R16 is shown. By disposing the waist elastic member 45 in the second separated region R16, the rigidity of the region of the waist band 80Z in front of the facing portion can be increased, and the facing portion can be prevented from being pulled down toward the crotch side. Therefore, the buttocks can be continuously covered with the waist band 80Z, and post leakage can be suppressed.

Although the present invention has been described in detail above using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the disposable diaper which can secure the accommodation area of the pocket by a waist band and can suppress generation|occurrence|production of a back leak can be provided.

10, 10Z: Disposable diaper 10F: Front edge 10R of disposable diaper: Rear edge 20 of disposable diaper: Skin side sheet 21: Surface sheet 22: Side sheet 23: Back sheet 24: Exterior sheet 25: Non-skin side sheet 31: Absorbing core 31R: Absorbing core rear edge 42: Leg elastic member 45: Waist elastic member (reinforcing sheet)
45F: Front end edge 45R of waist elastic member: Rear edge 60: Leak preventive gather 61: Leak preventive elastic member 65: Leg opening 66: Waist opening 80, 80Z: Waist band 80F: Waist band front end edge 80R: Waist band rear edge 81: Sheet layer 811: First non-woven fabric layer 812: Second non-woven fabric layer 813: Film layer 82: Band elastic member 83: Opposing part 83F: Front end edge 83R of the opposed part: Rear end edge of the opposed part 84: Joined portion 84F: Front end edge (second base end edge) of the joined portion
84R: Rear end edge of joint 85: Non-joint (standing portion)
85F: Front end edge 85R of non-joint portion: Rear end edge 86 of non-joint portion: Folded portion 86R: Rear end edge 87 of folded portion 87: Side joint portion 87I: Inner edge of the side joint portion (first base edge)
90: fastening tape 90F: front edge 90R of fastening tape: rear edge 92 of fastening tape: base part 93: locking part 93F: front edge 93R of locking part: rear edge 95 of locking part: target part FL , FL1: Fold R11: Tape placement region R12: Waist opening region R12CL: Center of the waist opening region in the front-rear direction R13: Locking arrangement region R14: Waist region R14CL: Center of the waist region in the front-rear direction R15: Separation region R16: No. 2 Separation area AS: Storage space S1: Front waistline area S2: Rear waistline area S3: Inseam area T: Thickness direction T1: Skin facing surface side T2: Non-skin facing surface side L: Front-back direction W: Width direction

Claims (12)

Front-back direction and width direction orthogonal to each other,
A front waist region, a rear waist region, and a crotch region arranged between the front waist region and the rear waist region,
An absorbent core,
A skin side sheet located on the skin facing surface side of the absorbent core,
In the rear waistline region, located on the skin facing surface side of the skin surface side sheet, having a waist band that expands and contracts in the width direction,
The waist band is an upright portion configured to be upright with respect to the skin-side sheet, and a first base end serving as an upright fulcrum of the upright portion outside the upright portion and the absorbent core in the width direction. A disposable diaper having an edge and a second base end edge which serves as an upright fulcrum of the upright portion on the waist opening side with respect to the upright portion,
When the distance in the width direction between the first base end edge and the absorbent core in the stretched state of the disposable diaper is S, and the length in the front-rear direction of the standing portion in the stretched state is Y,
A disposable diaper that satisfies S≧Y. The second base edge is located rearward of the rear edge of the absorbent core,
When the distance in the front-rear direction between the rear end edge of the absorbent core and the second base end edge in the extended state is U,
The disposable diaper according to claim 1, which satisfies S≦Y+U. In the extended state, the front end edge of the standing portion is located on the front side of the rear end edge of the absorbent core,
When the distance in the front-rear direction between the rear end edge of the absorbent core and the front end edge of the standing portion in the extended state is V,
The disposable diaper according to claim 2, wherein V≧the above U is satisfied. In the extended state, the front end edge of the standing portion is located on the front side of the rear end edge of the absorbent core,
When the distance in the front-rear direction between the rear end edge of the absorbent core and the front end edge of the standing portion in the extended state is V,
The disposable diaper according to claim 2, wherein the U>V is satisfied. The disposable sheet according to any one of claims 2 to 4, wherein a reinforcing sheet is provided in a region between the rear end edge of the absorbent core and the second base end edge in the extended state. Diapers. The disposable diaper according to claim 5, wherein the reinforcing sheet is arranged over the entire area of the waist band in the width direction. The waist band extends from the second base edge in the front-rear direction and has a joint portion joined to the skin-side sheet,
The disposable diaper according to any one of claims 2 to 6, wherein a contraction force of the joint portion is lower than a contraction force of the upright portion. The waist band extends from the second base edge in the front-rear direction and has a joint portion joined to the skin-side sheet,
When the length of the joint in the front-rear direction is X,
The disposable diaper according to any one of claims 2 to 7, which satisfies the U≦X. The waist band has a folded-back portion that is folded back to the wearer side on the rear side with the front end edge of the standing portion as a base point,
The disposable diaper according to any one of claims 1 to 8, wherein a contracting force of the folded-back portion is higher than a contracting force of the upright portion. The disposable diaper according to claim 9, wherein the length of the folded portion in the front-rear direction is longer than the length of the standing portion in the front-rear direction. The skin side sheet has a top sheet, and a pair of side sheets covering both outer side portions of the top sheet,
The side sheet constitutes a pair of leak-proof gathers having a contracting portion that stands up due to the contraction of the leak-proof elastic member,
The leakage-prevention gather has a leakage-prevention base end edge that serves as an upright fulcrum of the contraction portion outside the contraction portion in the width direction,
The disposable diaper according to any one of claims 1 to 10, wherein the first proximal end edge of the waistband is located outside the leakproof proximal end edge of the leakproof gather in the width direction. .. Has a fastening tape arranged in the rear waist region,
The disposable diaper according to any one of claims 1 to 11, wherein the waist band overlaps with the fastening tape in the thickness direction.

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