JP6453146B2 - Disposable wearing items - Google Patents

Description

  The present invention relates to a disposable wearing article.

  Conventionally, disposable wearing articles in the form of pants by connecting the front waist region and the rear waist region via connecting means are known. For example, Patent Document 1 discloses a disposable wear having a connecting means including a pair of band-shaped connecting members attached to a rear waist region of a diaper body and a pair of locking portions positioned in a front waist region of the diaper body. An article is disclosed. The pair of connecting members are arranged in the length direction of the diaper main body.

JP 2000-033100 A

  In the wearing article of patent documents 1, since the length direction (longitudinal direction) of a diaper main body and the length direction of a connecting member correspond, a diaper main part and a connecting member on a production line of a wearing article Can be manufactured while being continuously conveyed in the same machine direction, and is excellent in continuous productivity.

  However, only the hot melt adhesive is uniformly applied to the boundary side joining area along the boundary line between the base end part and the free part of the connecting means, and has the same peel strength as the other joining areas. In such a boundary joining area, when the diaper is worn, a force for peeling the connecting member when it is pulled toward the front waist acts, and in particular, a larger pulling force acts on the inner end portion. Therefore, there is a possibility that the inner end portion may be peeled off during the wearing operation. Therefore, it is necessary to set the peel strength of the boundary side joint area to be high, but in order to increase the peel strength of the entire boundary side joint area, if the joint area is relatively large, There is a possibility that the rigidity becomes excessively high and the wearer may feel uncomfortable.

  Then, the objective of this invention is improvement of the prior art, Comprising: It exists in provision of the disposable wear article which can suppress that connection with a connection member and a diaper main body is cancelled | released during wear.

  In order to achieve the above object, the present invention has a first waist region that is one of the front and rear waist regions, a second waist region that is the other of the front and rear waist regions, A disposable wearing article comprising a diaper main body having a crotch region located between 1 and a second waist region, and a pair of connecting members for connecting the first waist region and the second waist region is intended. .

In the disposable wearing article according to the present invention, each of the pair of connecting members is a base end fixed to the first waist region, and a free part extending from the base end toward the second waist region. And a boundary line between the base end portion and the free portion is inclined from the crotch region toward the waist opening side so as to go from the outside in the lateral direction to the inside, and the base end portion is A boundary-side joint area extending along a boundary line, the boundary-side joint area having an outer end located on the waist opening side and an inner end located on the crotch area side; The longitudinal peel strength at the end portion is higher than the longitudinal peel strength at the outer end portion, and the longitudinal peel strength at the inner end portion is at least 10 N / 25 mm. .

  According to one or more embodiments of the disposable wearing article according to the present invention, the longitudinal peel strength at the inner end is higher than the peel strength in the longitudinal direction of the outer end in the boundary-side joining region of the proximal end. For this reason, even when a force pulling in the vertical direction is strongly applied to the inner end portion during wearing and wearing operation, it is possible to suppress the occurrence of peeling starting from the inner end portion. In addition, in order to further improve the absorption performance, the worn article can be used by placing a replaceable separate absorbent pad on the inner surface side and overlapping the absorbent pad. In this way, by using the absorbent pad in combination, when only the pad needs to be replaced, the worn article can be used for a long time as an exterior body. Even when used for a long time, the connecting member can be continuously used without being damaged by the movement of the wearer. Moreover, even if a wearer (caregiver) repeats operation of a connection member many times, it is hard to peel, and a wearer can operate in comfort.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view seen from the front side in the wearing condition of a diaper shown as an example of the disposable wearing article concerning this indication. The perspective view seen from the back side in the wearing state of a diaper. The top view which looked at the diaper from the skin opposing surface side. The top view which looked at the diaper from the non-skin opposing surface side. Sectional drawing which follows the VV line | wire of FIG. FIG. 5 is a partially enlarged view of a region surrounded by a one-dot chain line VI in FIG. 4. (A) The elements on larger scale of the outer end part of a boundary side junction area. (B) The elements on larger scale of the inner edge part of a boundary side junction area. (A)-(d) The figure which shows the mode of wearing operation of a diaper. The figure similar to FIG. 6 of the modification 1 which is an example of a modification. (A) The partial enlarged view of the outer end part of the boundary side junction area in the modification 1. (B) The elements on larger scale of the inner edge part of a boundary side junction area. The figure similar to FIG. The figure similar to FIG. (A) The figure which shows the mode of the sample to cut out regarding the measuring method of the peeling strength of the direction orthogonal to a boundary side joining area. (B) The figure which shows the mode of the sample to cut out regarding the measuring method of the peeling strength of the horizontal direction of a boundary side joining area. (C) The figure which shows the mode of the sample to cut out regarding the measuring method of the peeling strength of the longitudinal direction of a boundary side joining area. (A) The figure which shows a mode that the sample cut out in Fig.13 (a) was set to the tension tester. (B) The figure which shows a mode that the sample cut out in FIG.13 (b) was set to the tensile tester. (C) The figure which shows a mode that the sample cut out in FIG.13 (c) was set to the tensile tester.

  The following embodiment relates to the disposable diaper shown in FIGS. 1 to 14 as an example of the disposable wearing article of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. 3 and 4, each elastic body to be described later is naturally gathered on the member to which each elastic body is attached due to the contraction force in the horizontal direction X and the vertical direction Y against the contraction force. It is in a state of being stretched to such an extent that it appears to be substantially lost visually.

  1 to 5, a diaper 10 which is an example of a disposable wearing article according to the present invention has a diaper body 14 and a connecting means 15, and the diaper body 14 has a longitudinal direction Y and a lateral direction perpendicular thereto. Direction X, skin facing surface and non-skin facing surface on the opposite side, longitudinal center line P that bisects the length dimension in the lateral direction X, and lateral center that bisects the length dimension in the longitudinal direction Y Between line Q, front waist region (first waist region or second waist region) 11, rear waist region (second waist region or first waist region) 12, and between front waist region 11 and rear waist region 12 And a crotch region 13 located. The connecting means 15 includes a pair of first connecting members 30 attached to the rear waist region 12 and a pair of fastening tapes 40 attached to the front waist region 11. The diaper 10 is substantially symmetric with respect to the longitudinal center line P, and the waist opening 16 and the pair of leg openings 17 are defined by connecting the front waist region 11 and the rear waist region 12 of the diaper main body 14 by the connecting means 15. The diaper 10 has a pant shape.

<Diaper body>
The diaper main body 14 includes a front and rear end edges 14a and 14b extending in the horizontal direction X and facing each other in the vertical direction Y, and both side edges 14c extending in the vertical direction Y between the front end edge 14a and the rear end edge 14b. 14d. The diaper main body 14 includes a liquid-permeable surface sheet 21 located on the skin facing surface side, a liquid-impermeable back sheet 22 located on the non-skin facing surface side, and between the surface sheet 21 and the back sheet 22. In the transverse direction X on the skin facing surface side of the top sheet 21, the interposed absorbent body 23, the liquid-impervious or liquid-impervious leakproof sheet 24 positioned between the absorbent body 23 and the back sheet 22. And a pair of barrier cuff sheets 25 arranged to face each other.

  The surface sheet 21 is formed from various known fiber nonwoven fabrics such as spunbond fiber nonwoven fabrics and air-through fiber nonwoven fabrics, porous plastic films, or laminate sheets of fiber nonwoven fabrics and plastic films. The back sheet 22 forms the outer shape of the diaper 10 and is formed from a moisture-permeable plastic film, various known fiber nonwoven fabrics, or laminate sheets thereof.

The absorber 23 includes curved front and rear end edges 23a and 23b, both side edges 23c and 23d extending in the vertical direction Y in a concave shape between the front and rear end edges 23a and 23b, front and rear end portions 20A and 20B, It has a central portion 20C located between the end portions 20A and 20B, and extends to the front and rear waist regions 11 and 12 with the crotch region 13 as the center. The absorbent body 23 is formed of a mixture of fluffed wood pulp and superabsorbent polymer (SAP) particles, and the like. The absorbent core is shaped into a required shape, and a liquid diffusible tissue enveloping the absorbent core. A core cover sheet formed of paper or the like. The absorbent core may include thermoplastic fibers. Mass of fluff wood pulp is 100 to 800 g / ^{m 2,} preferably the mass of SAP particles is 0~800g / ^{m 2,} in the present embodiment, about 300 g ^/ m 2 is fluffed wood pulp, SAP particles Is about 150 g / m ² and the thickness dimension of the absorbent core is about 30 mm.

  The leak-proof sheet 24 covers at least the entire non-skin-facing surface (bottom surface) of the absorber 23, and a publicly known hot melt adhesive (not shown) or the like is provided between the core cover sheet and the back sheet 22 of the absorber 23. It can join by the joining means. In the present embodiment, the leak-proof sheet 24 is a sheet having substantially the same shape and size as the back sheet 22. As the leak-proof sheet 24, for example, a plastic film that is breathable or non-breathable and hardly liquid-permeable, preferably liquid-impermeable can be used.

  In the diaper main body 14, a top sheet 21, a back sheet 22, a leak-proof sheet 24, and a barrier cuff sheet 25 extending from the front and rear end edges 23 a and 23 b of the absorber 23 to the outside in the longitudinal direction Y are overlapped and joined to each other. A pair of end flaps extending in the lateral direction X, a top sheet 21 extending from both side edges of the absorbent body to the outside in the lateral direction X, a back sheet 22, a leak-proof sheet 24, and a barrier cuff sheet 25. And a pair of side flaps extending in the longitudinal direction Y, which are formed by overlapping and joining each other.

  The pair of barrier cuff sheets 25 are formed from a liquid-impervious fiber nonwoven fabric, are symmetrical with respect to the longitudinal center line P, and are spaced apart from each other in the lateral direction X. A longitudinal direction Y between the proximal edge portion 26A forming the portion, the front and rear fixed end portions 27A and 27B fixed to the skin facing surface of the topsheet 21 in the front and rear waist regions 11 and 12, and the front and rear fixed end portions 27A and 27B And a distal edge 26B formed by folding the inner edge of the barrier cuff sheet 25 inward. The outer edge (the side edge on the proximal edge portion 26 </ b> A side) of the barrier cuff sheet 25 is joined to the leak-proof sheet 24. A plurality of string-like or strand-like leg elastic bodies 28 extending in the longitudinal direction Y are attached between the barrier cuff sheet 25 and the leak-proof sheet 24 so as to be contracted in an extended state. Further, a strand-like or string-like cuff elastic body 29 extending in the longitudinal direction Y is disposed in the distal edge portion 26B so as to be contractible. When the diaper 10 is worn, the distal edge 26B is separated from the skin-facing surface of the topsheet 21 by the contracting action of the cuff elastic body 29, and a pair of barrier cuffs are formed to prevent the side leakage of excrement. .

  Referring to FIG. 3, a waist elastic portion 60 extending in the lateral direction X is located in the vicinity of the rear edge 14 b of the rear waist region 12. The waist elastic portion 60 is formed of a belt-like elastic sheet that is elastically stretchable in the lateral direction X and is disposed between the surface sheet 21 and the leak-proof sheet 24 outside the absorbent body 23 in the longitudinal direction Y. The elastic sheet has a plurality of string-like or strands extending in the lateral direction X, arranged between the inner layer sheet positioned on the skin facing surface side, the outer layer sheet positioned on the non-skin facing surface side, and the inner and outer layer sheets. Shaped waist elastic body 61. In the present embodiment, the waist elastic portion 60 is a central portion in the lateral direction X and is disposed between the pair of first connecting members 30. Thus, by forming the waist elastic part 60 in the vicinity of the rear end edge 14b, the fit of the rear waist region 12 can be improved, and leakage from the rear end edge 14b can be effectively prevented.

  Referring to FIGS. 3 and 4, the center locking portion 27 is located on the skin facing surface side of the front waist region 11. The central locking portion 27 is for engaging a part of the front waist region 11 with the first connecting member 30 attached to the rear waist region 12, and may be located in the vicinity of the front edge 14a. preferable. In the present embodiment, the central locking portion 27 has a rectangular shape, the dimension in the horizontal direction X is 40 mm, and the dimension in the vertical direction Y is 20 mm. In the wearing state of the diaper 10 to be described later, by locking the center locking portion 27 to the first connecting member 30, the fit of the front waist region 11 to the body is improved and the front waist region 11 is prevented from slipping down. can do.

<Connecting means>
Referring to FIG. 4, the connecting means 15 includes a pair of connecting members 30 extending in the longitudinal direction Y from the rear waist region 12 toward the front waist region 11 in the central portion of the diaper main body 14 in the unfolded state of the diaper 10, and a diaper. It includes a pair of fastening tapes 40 extending in the lateral direction X on both sides of the front waist region 11 of the main body 14.

  The connecting member 30 has a belt-like shape, and has a base end edge 30a and a front end edge 30b that extend adjacent to each other in the lateral direction X, and an inner edge 30c and an outer edge 30d that face each other and extend in the longitudinal direction Y. A base end portion 31 fixed via a joining region 38 (a region indicated by a thin dot in each drawing) formed by applying a hot melt adhesive to the rear waist region 12 of the diaper body 14, and the crotch from the base end portion 31. And a free portion 32 extending to the region 13 side. The connecting member 30 further includes a boundary line (inner edge of the base end portion) 31c between the base end portion 31 and the free portion 32. The proximal end portion 31 has a boundary-side joining area 70 that extends along the boundary line 31c.

  In the present embodiment, the base end portion 31 is fixed to the back sheet 22 located on the non-skin facing surface side of the rear waist region 12. Moreover, in this embodiment, although the connection member 30 is located in the rear waist region 12, and the fastening tape 40 is located in the front waist region 11, the connection member 30 is the front waist region 11, and the fastening tape 40 is the rear waist region. 12 may be located. The distal end portion 33 of the connecting member 30 is a free end portion that is not fixed to the diaper main body 14, and the distal end portion 33 of at least one of the connecting members 30 of the pair of connecting members 30 includes the outer surface of the diaper main body 14 and The 1st latching | locking part 34 which can be latched to the other connection member 30 is located.

4 and 5, the connecting member 30 includes a first sheet 35 located on the skin facing surface side and a second sheet 36 located on the non-skin facing surface side. The first and second sheets 35 and 36 have substantially the same shape and size, and the first and second sheets 35 and 36 have a mass of about 10 to 80 g / m ² and preferably have a hydrophobic property. A known fiber nonwoven fabric such as a spunbond fiber nonwoven fabric, an air-through fiber nonwoven fabric, a spunbond / meltblown / spunbond (SMS) fiber nonwoven fabric, a plastic film, or a laminate sheet of a fiber nonwoven fabric and a plastic film can be used. Moreover, the elastic fiber nonwoven fabric which can be elastically expanded-contracted at least in the length direction (longitudinal direction Y) can be used. The mass of the sheet constituting the connecting member 30 (that is, the total mass of the first and second sheets 35 and 36) is preferably about 30 to 150 (g / m ² ). When the mass is less than 30 g / m ² , tearing tends to occur at the time of use, and when it exceeds 150 g / m ² , the member cost increases and the rigidity becomes high, which may give the wearer an uncomfortable feeling. The first sheet 35 and the second sheet 36 are joined to each other by fixing with a hot melt adhesive or instead of fusing means with a sonic seal.

  Although not shown, a plurality of string-like or strand-like belt elastic bodies are arranged between the first sheet 35 and the second sheet 36 so as to extend in the longitudinal direction Y and are fixed so as to be retractable in an extended state. May be. The belt elastic body is continuously arranged over the entire area of the free portion 32 so as to be elastically stretchable in the longitudinal direction Y, or partially arranged so that a part of the belt elastic body can be expanded and contracted in the longitudinal direction Y. can do. The belt elastic body is preferably disposed so as to have elasticity at a position separated from the first locking portion 34, and is disposed on the base end portion 31 side in the free portion 32 of the connecting member 30. More preferred.

  The fastening tape 40 includes a support sheet 43 and a second locking portion 44 attached to the support sheet 43. The support sheet 43 includes a fixing portion 41 fixed to the front waist region 11 of the diaper main body 14 by a known joining means such as a hot melt adhesive, and an extending portion 42 extending outward from the fixing portion 41 in the lateral direction X. The second locking portion 44 can be locked to at least the connecting member 30 and is located at the distal end portion of the extending portion 42. 3 and 4 show a state in which the fastening tape 40 is expanded in the lateral direction X. In the state in which the diaper 10 is packaged, the extending portion 42 is folded to the inner surface side of the diaper main body 14, and The two locking portions 44 are preferably locked to the inner surface of the diaper main body 14.

The support sheet 43 has a mass of about 50 to 80 g / m ² , and preferably has various hydrophobic fiber nonwoven fabrics such as spunbond fiber nonwoven fabrics and air-through fiber nonwoven fabrics, plastic films, or fiber nonwoven fabrics and plastic films. And a laminate sheet. In the present embodiment, the dimension (length dimension) in the lateral direction X of the support sheet 43 is approximately 100 mm, the dimension (width dimension) in the longitudinal direction Y is approximately 30 mm, and the dimension in the lateral direction X of the fixing portion 41 is approximately 30 mm. The dimension of the extending portion 42 in the lateral direction X is set to about 70 mm, but these dimensions are not limited to this and can be set as appropriate.

  In addition, although not shown in figure, it may arrange | position the latching | locking part which can be latched with the connection member 30 on the inner surface of the both sides of the front waist area 11 of the diaper main body 14 with the fastening tape 40 or instead of this. Good. When the fastening tape 40 is disposed, when the wearer moves and a tensile force acts on the fastening tape 40 in a state where the diaper 10 is worn, the locking portion (second locking portion) has a tensile force. It becomes difficult to be affected and the engagement is difficult to disengage. When a locking portion is provided in place of the fastening tape 40, it is possible to eliminate the trouble of developing the fastening tape 40.

  The first and second locking portions 34 and 44 are a base material joined to the hook sheet via a hook sheet on which hook elements are arranged and a hot melt adhesive applied in a dot shape, a line shape or a spiral shape. It consists of a sheet. When a relatively bulky fiber nonwoven fabric is used as the base sheet, the base sheet may be embossed on the surface of the base sheet to prevent fuzz. The base sheet is joined to the second sheet 36 and the support sheet 43 by a known joining means such as a hot melt adhesive or heat seal. In this embodiment, the hook elements in the first and second locking portions 34 and 44 are fiber nonwoven fabrics forming the inner and outer surfaces of the diaper body 14 and fiber nonwoven fabrics forming the connecting member 30 (first and second sheets 35, 36).

  In the present embodiment, a hook element of a mechanical fastener is used as an example of the first and second locking portions 34 and 44. However, the first and second locking portions 34 and 44 have a hook element and a loop element. It may have both, or may be a loop element that can be locked to a hook element arranged on the diaper main body 14 side or the connecting member 30 (in that sense, a locked portion), and the diaper 10 This means a portion that can be releasably locked with a predetermined portion of the above, and means a wider concept including an adhesive or the like than a general locking portion that means only a hook element. Similarly, as long as the central locking portion 27 is detachably engaged with the connecting member 30, it can be any of hook elements, loop elements, or adhesive elements such as an adhesive. Good.

  The first locking portion 34 may be disposed not in the distal end portion 33 of the connecting member 30 but in any portion of the free portion 32, or a plurality of the first locking portions 34 may be disposed. When a plurality of first locking portions 34 are arranged in the free portion 32, the central region in the length direction of the free portion 32 including the distal end portion 33 is also locked to the connecting member 30 and the diaper main body 14. And the locked state can be made more stable.

  Referring to FIG. 4, the pair of connecting members 30 are attached along the vertical direction Y and are arranged so as to be symmetric with respect to the vertical center line P. In the connecting member 30, the base end edge 30 a coincides with the rear end edge 14 b of the diaper main body 14. The inner edges 30c of the pair of connecting members 30 are adjacent to each other in the horizontal direction X and are connected via a perforation 51 extending in the vertical direction Y. Note that the pair of connecting members 30 may be spaced apart in the lateral direction X. In a state where the pair of connecting members 30 are separated from each other, when the diaper main body 14 is disposed at the central portion in the lateral direction X, the separation dimension is about 5 to 15 mm, preferably about 10 mm. A pair of connecting members 30 may be disposed on both sides of the diaper main body 14.

  In the diaper 10, when the pair of connecting members 30 are adjacent to each other, the pair of connecting members 30 can be integrally formed without being separated in the lateral direction X in the manufacturing process. Can be improved. In the manufacturing process, the diaper 10 is a state in which the pair of connecting members 30 are cut in the vertical direction Y at the position where the perforation 51 is formed, and the pair of connecting members 30 adjacent in the horizontal direction X are separated from each other. Good. The dimension of the penetration part (cut part) and the non-penetration part of the perforation 51 becomes easy to separate when the diaper 10 is used without the connecting member 30 being separated along the perforation 51 when the diaper 10 is manufactured. It can set suitably as follows.

  By matching the length direction of the connecting member 30 and the diaper main body 14, the diaper main body 14 and the connecting member 30 can be continuously conveyed in the machine direction on the production line of the diaper 10 and manufactured. Excellent productivity. Further, even when the connecting member 30 has a belt elastic body, the length direction of the belt elastic body is matched, so that continuous productivity is excellent. When the pair of connecting members 30 are adjacent to each other without being separated from each other, the paired connecting members 30 can be integrally formed, and the productivity is further improved. The dimension (length dimension) L1 of the diaper main body 14 in the vertical direction Y is about 400 to 1200 mm, and in this embodiment is about 840 mm. The dimension (length dimension) L2 in the longitudinal direction Y of the connecting member 30 is about 100 to 1200 mm, preferably about 400 to 1000 mm, and in this embodiment is about 550 mm. The dimension (width dimension) W1 of the diaper main body 14 in the horizontal direction X is about 150 to 450 mm, and is about 340 mm in this embodiment. The dimension (width dimension) W2 of the connecting member 30 in the lateral direction X is about 50 to 200 mm, and is about 90 mm in this embodiment. When the width dimension W2 of the connecting member 30 is less than 50 mm, the position of the connecting member 30 may not be stable when the diaper 10 is worn. Moreover, when width dimension W2 exceeds 200 mm, manufacturing cost becomes high and there exists a possibility of preventing a wearer's leg movement in a wearing condition.

  The free portion 32 of the connecting member 30 is temporarily fixed to the back sheet 22 of the diaper main body 14 through the temporary fixing portion 57 so as to be peelable. In the temporary fixing portion 57, the connecting member 30 and the back sheet 22 are temporarily fixed to each other by a joining means such as a sonic seal or an adhesive. The temporary fixing portions 57 are formed intermittently at regular intervals in the longitudinal direction Y at both side edges of the connecting member 30. By temporarily fixing the connecting member 30 to the diaper main body 14 along the length direction (longitudinal direction Y), the free portion 32 is developed so as to extend outward from the side edges 14c, 14d of the diaper main body 14, When the diaper 10 is transported or accommodated in a storage bag, it is possible to prevent unnecessary creases or causing troubles in the manufacturing process.

  3 and 4, on the outer surface (non-skin facing surface) of the rear waist region 12, there is a third engagement between the side edges 14c, 14d of the diaper 10 and the inner edge 30c of the connecting member 30, respectively. A stop 55 is arranged. Here, the inner edge 30c of the connecting member 30 indicates the position of the inner edge 30c when the connecting member 30 is in a non-deployed state (shown by a solid line in FIG. 4). The 3rd latching | locking part 55 can be latched to the 2nd sheet | seat 36 of the back sheet 22 of the diaper main body 14, and / or the connection member 30 which forms the non-skin opposing surface of the back waist region 12. FIG. In addition, in this embodiment, the 3rd latching | locking part 55 can be engaged with the fiber nonwoven fabric which forms the inner surface and outer surface of the diaper main body 14, and the fiber nonwoven fabric which forms the connection member 30. FIG.

  The 3rd latching | locking part 55 latches the outer surface of the free part 32 to the rear waist area 12 of the diaper 10 when the free part 32 of the connection member 30 is expand | deployed to the horizontal direction X outer side in the wearing condition of the diaper 10. In the longitudinal direction Y, the base end portion 31 is disposed in a range. In this embodiment, the 3rd latching | locking part 55 is located between the boundary line 31c of the connection member 30, and the both-sides edges 14c and 14d of the diaper 10. As shown in FIG. Here, the boundary line 31c of the connecting member 30 indicates the position of the boundary line 31c when the connecting member 30 is in a non-deployed state (a state indicated by a solid line in FIG. 4). In this way, by disposing the third locking portion 55, the base end portion 31 side of the free portion 32 of the connecting member 30 can be fixed to prevent displacement, and the state extended in the lateral direction X Can be easily maintained. In addition, the 3rd latching | locking part 55 may be arrange | positioned on the outer surface of the base end part 31 of the connection member 30, and / or the free part 32, as long as there exists an effect mentioned above.

  Referring to FIG. 6, the base end portion 31 has an outer end edge 31 a extending in the lateral direction X on the waist opening 16 side, and an outer side extending in the longitudinal direction Y from the outer end edge 31 a on both side edges 14 c and 14 d side of the diaper body 14. It has a substantially triangular shape having an edge 31b and a boundary line (inner edge or inclined edge) 31c that connects the outer edge 31a and the outer edge 31b on the crotch region 13 side. The boundary line 31 is inclined from the crotch region 13 toward the waist opening 16 toward the inside from the outside in the lateral direction X.

  The intersection angle θ between the boundary line 31c and the transverse line 62 (a line parallel to the lateral center line Q along the side edge of the connecting member 30) is in the range of about 30 to 50 degrees and is about 42 to 48 degrees. It is preferably about 43 degrees in this embodiment. Since the base end portion 31 has such a shape, the connecting member 30 is easily developed in the lateral direction X starting from the boundary line 31c, and is easily pulled along the waist direction. When the crossing angle θ is less than 45 degrees, the free part 32 is easily developed toward the waist opening 16, and when it exceeds 45 degrees, the free part 32 is easily developed toward the crotch region 13.

  Further, compared with the case where the base end portion 31 does not have the boundary line 31c and extends linearly in the lateral direction X, the size of the portion in the vicinity of the boundary with the free portion 32 becomes longer. While maintaining the required peel strength of the sheet member, the length of the free portion 32 can be made as long as possible to improve fit to the body. Moreover, in this embodiment, the base end part 31 and the waist elastic part 60 have mutually overlapped in the thickness direction Z, and when the connecting member 30 is pulled and deployed, the waist elastic part 60 extends in conjunction with each other. It has become easier.

  In the boundary joining area 70 extending along the boundary line 31c of the base end portion 31, the back sheet 22 and the connecting member 30 are a plurality of joints formed by known fusion means such as ultrasonic sealing or heat sealing. They are joined to each other via the part 75. 6, 7 and 9 to 12, the configuration of the base end portion 31 of one of the connecting members 30 will be described, but the other connecting member 31 also has the same configuration.

  The boundary side joining area 70 has an outer end portion 73 located on the waist opening 16 side, an inner end portion 74 located on the leg opening 17 side, and an intermediate portion 80 located between the outer inner end portions 73 and 74. . The boundary side joining area 70 may be divided so that the length dimension L3 and / or the area thereof is substantially divided into three equal parts, but the intermediate part 80 is optional, and two of the outer and inner end parts 73 and 74 are provided. It may be divided into two. In the present embodiment, the outer end portion 73 and the inner end portion 74 have substantially the same length dimension and area. For example, each of the outer end portion 73 and the inner end portion 74 is approximately 25 of the length dimension L3 of the boundary side joining area 70. It has a size of -50% and / or an area of about 20-50% of its total area. Therefore, the boundary junction area 70 may be divided into two parts, the outer and inner end parts 73 and 74, or may be divided into three parts including an intermediate part 80 described later. When divided into three, the boundary side joining area 70 may be equally divided in the length dimension L3, the intermediate part 80 is smaller in length than the inner and outer end parts 73 and 74, etc. It does not need to be equally divided so that it may become the same length dimension.

  Referring to FIG. 6 and FIGS. 7A and 7B, the boundary joining region 70 further includes a plurality of independent joining portions 75 and a non-joining portion 76 in which the joining portions 75 are not disposed. The joint portion 75 includes a plurality of outer end joint portions 75A that are spaced apart from each other at the outer end portion 73, a plurality of inner end joint portions 75B that are spaced apart from each other at the inner end portion 74, and an intermediate portion 80. And a plurality of intermediate joint portions 75C that are spaced apart from each other. The outer end portion 73 and the inner end portion 74 are regions having a width dimension (dimension in the length direction K) of about 30 mm from the opening edges of the waist opening 16 and the leg opening 17 that are most likely to be applied with force. In these regions, it is only necessary that at least one joining portion 75A, 75B having the above relationship exists.

  Referring to FIGS. 7A and 7B, the outer end joint portion 75A has a vertically long elliptical shape, the length dimension M1 in the longitudinal direction Y is about 0.7 to 3.0 mm, and the lateral direction X The length dimension (width dimension) N1 is about 0.5 to 1.5 mm. The inner end joined portion 75B has a horizontally long rectangular shape, the length dimension M2 in the transverse direction X is about 1.0 to 3.0 mm, and the dimension (width dimension) N2 in the longitudinal direction Y is about 0.5 to 1. .5 mm. The outer end joint portion 75A and the inner end joint portion 75B have substantially the same area, and the area ratio of the outer inner end joint portions 75A and 75B per predetermined area in the outer end portion 73 and the inner end portion 74 is substantially equal. The same.

  FIGS. 8A to 8D show an operation procedure when the diaper 10 is worn on the wearer. Referring to FIG. 8A, first, the pair of connecting members 30 are separated from the diaper main body 14, and the rear waist region 12 of the diaper 10 is opposed to the wearer's back side in a state where the connecting members 30 are deployed. To place. In such a developed state, the free portion 32 of the connecting member 30 is locked to the third locking portion 55 of the rear waist region 12. Thus, by locking the third locking portion 55, the base end portion 31 side of the free portion 32 can be fixed to prevent displacement, and the connecting member 30 extends in the lateral direction X. It can be made easy to maintain in the state.

  Next, as shown in FIG. 8 (b), the second sheet 36 is wound around the waist of the wearer while pulling the pair of connection members 30 so that the second sheet 36 faces the wearer's body. One locking portion 34 is locked to the other connecting member 30. The rear waist region 12 of the diaper 10 is fixed to the wearer's body by a strip-shaped connecting member 30. At this time, since the waist elastic part 60 is extended in conjunction with the connecting member 30, the fit of the rear waist region 12 is improved. Although not shown, when the first locking portion 34 is disposed on each of the pair of connecting members 30, the connecting members 30 can be connected to each other by the connecting members 30 and are located on the inner side. And the connecting member 30 located outside can be firmly fixed around the waist.

  Next, as shown in FIGS. 8 (c) and 8 (d), the front waist region 11 or the fastening tape 40 is drawn and arranged so that the front waist region 11 faces the abdomen of the wearer, and the front waist region 11 and the second locking portion 44 of the fastening tape 40 are locked to the connecting member 30. By pulling the fastening tape 40 in the transverse direction X and pulling it up in the direction of both sides of the wearer, it is possible to fit the body with the front waist region 11 fully expanded, and the leg elastic body The leg elastic region of the arranged diaper main body 14 can be fitted around the wearer's leg.

  In the diaper 10 having the belt-like connecting member 30 that locks the paired members in the wearing state, the belt-like connecting member 30 is wound around the waist 70 of the wearer to stabilize the position of the diaper 10. In the state, the front waist region 11 can be pulled up or the fastening tape 40 can be operated. In such a diaper 10, compared to a diaper having only a fastening tape having a relatively small length dimension, when the wearer is in a sleeping state, the frequency of moving or rotating the wearer's body is reduced. It is possible to reduce the burden on the operator (a wear assistant such as a caregiver). In the diaper 10 in which the connecting member 30 is attached along the length direction (longitudinal direction Y) of the diaper main body 14, the connecting member is attached along the width direction of the diaper main body 14 in the bent state of the diaper 10. As compared with the above, the number of times of bending of the free portion 32 of the connecting member 30 can be reduced, and the wrinkles and creases formed in the free portion 32 can be reduced. Can be improved.

  Thus, in the wearing operation of the diaper 10, the connecting member 30 is hung around the abdomen while pulling outside the body in a state where the wearer's body is positioned on the base end portion 31, so A force acts to peel it in a direction perpendicular to its length direction. Further, when the pair of connecting members 30 are hung around the abdomen and connected to each other, an operation of grasping the connecting member 30 and pulling it up as it is is necessary to move the diaper 10 to an appropriate position. In addition, when worn, the connecting member 30 is stretched in the direction around the waist (lateral direction X), whereby a tensile force in the lateral direction X is applied to the boundary-side joining region 70. That is, the boundary-side joining region 70 of the base end portion 30 includes i) a force F1 that pulls in the vertical direction Y from the leg opening 17 side to the waist opening 16 side, and ii) a force F2 that pulls from the inside in the lateral direction X to the outside. Iii) A force F3 pulling up in a direction orthogonal to the boundary line 31c is applied.

  The magnitudes of these pulling forces F1 to F3 are different for each part of the boundary side joining area 70, and the pulling force F1 from the leg opening 17 side to the waist opening 16 side is the strongest at the inner end portion 74 ( The force F2 acting first and pulling from the inner side to the outer side in the lateral direction X acts most strongly (first) on the outer end 73, and the force F3 pulling up in the direction perpendicular to the boundary line It can be said that it acts almost uniformly on the whole 70 or acts most strongly (first) on the intermediate portion 80. Therefore, in the boundary side joining area 70, it is the outer end portion 73 and the inner end portion 74 that concentrate these pulling forces, and in particular, the inner end portion 74 has a force of pulling upward. Since it acts locally, it can be said that it is the part that is most easily peeled off. In FIG. 6, each of the tensile forces F1 to F3 acts most strongly and / or in the first acting portion in the boundary-side joining region 70, but the tensile forces F1 to F3 are the boundaries. It can be said that it acts on the entire side joining area 70.

In the present embodiment, a plurality of outer end joints 75A have a vertically long elliptical shape and are arranged in the longitudinal direction Y, and a plurality of inner end joints 75B have a horizontally long rectangular shape and are arranged in the transverse direction X. It is out. Here, “a plurality of outer end joints 75A are arranged in the longitudinal direction Y” has the same width as an arbitrary outer end joint 75A (the diameter when the outer end joint 75A is circular). the total area of any cross each other around the outer edge joint 75A, the longitudinal region S ₁ and the transverse area S ₂ extending transverse direction X extending in the longitudinal direction Y, the outer end joint 75A located longitudinal region S ₁ If, when compared with the total area of the outer end joint 75A located at the crossing region S _2, which means that the former is larger than the latter. Further, “the plurality of inner end joint portions 75B extending in the lateral direction X are arranged in a row” intersects with each other about an arbitrary inner end joint portion 75B having the same width as the arbitrary inner end joint portion 75B. In the longitudinal section S ₃ extending in the longitudinal direction Y and the transverse section S ₄ extending in the lateral direction X, the total area of the inner end joint 75B located in the longitudinal section S ₃ and the inner end joint located in the transverse section S ₄ When compared with the total area of 75B, the latter means larger than the former. Further, the longitudinal transverse areas S _{1 to} S ₄ may not be areas having a predetermined width, but may be straight lines. In such a case, for example, the sum of the length dimension on the transverse line where the transverse line extending in the lateral direction X through the center of the arbitrary inner end joint portion 75B overlaps the plurality (or singular) of the inner end joint portions 75B; When the longitudinal line extending in the longitudinal direction Y through the center is compared with the sum of the lengths on the longitudinal line overlapping with the plural (or singular) inner end joints 75B, the former is larger than the latter. It can be said that the end joints 75B are arranged in the horizontal direction X.

Referring again to FIG. 7 (a), the vertical area S _1, to the whole to the position of the three outer edge joint 75A, the transverse area S ₂ is any of the outer end joint 75A Including only a part of the plurality of outer end joint portions 75A. Referring also to FIG. 7 (b), the number of inner end joint 75B located in a transverse zone S ₄ whereas almost the entire area thereof be three are positioned, in longitudinal area S ₃ is Only a part of the three inner end joints 75B is located. Therefore, the arrangement pattern of the outer / inner end joints 75A and 75B in the outer / inner ends 73 and 74 can be defined as described above.

  In general, it can be said that the peel strength in an arbitrary direction is higher in a joint extending in a direction perpendicular to / crossing the direction than in a joint extending in that direction. The outer end portion 73 forms a joint portion group composed of a plurality of outer end joint portions 75A arranged in the vertical direction Y, and the lower end portion 74 forms a plurality of inner end joint portions 75B arranged in the horizontal direction X. In the outer end 73, the peel strength in the lateral direction X is higher than the peel strength in the vertical direction Y, and in the inner end 74, the peel strength in the lateral direction X is formed. The peel strength in the longitudinal direction Y is higher than that. Thereby, even if the force F1 pulling in the longitudinal direction Y acts on the inner end portion 74 strongly, it is possible to suppress the release of the joining of the inner end joining portion 75B.

Here, if the assumption that a separate area of the outer end joint 75A and the inner end joint 75B is substantially the same, the total of the inner end joint 75B located in a transverse zone S ₄ of the inner end portion 74 the area, from a comparison with the total area of the outer end joint 75B located in a transverse zone S ₂ of the outer end portion 73, the former is larger than the latter. Therefore, it can be said that the peel strength in the longitudinal direction Y at the inner end portion 74 is higher than the peel strength in the longitudinal direction Y at the outer end portion 73, and a force F 1 that pulls it upward acts on the inner end portion 74. However, it does not peel off easily. On the other hand, even if the peel strength in the longitudinal direction Y at the outer end portion 73 is relatively low, the force F1 pulling upward does not act strongly (initially) on the outer end portion 73, so there is no possibility of peeling. .

Further, the total area of the outer edge joint portions 75A located on longitudinal zone S ₁ of the outer end portion 73, when comparing the total area of the inner end joint 75B located longitudinal area S ₃ of the inner end portion 74, the former Is larger than the latter. Therefore, it can be said that the peel strength in the lateral direction X at the outer end portion 73 is higher than the peel strength in the lateral direction X at the inner end portion 74, and the outer end portion 73 is pulled from the inner side to the outer side in the lateral direction X. Even if the force F2 acts, it does not peel off easily. On the other hand, even if the peel strength in the lateral direction X at the inner end portion 74 is relatively low, the force F2 pulling in the lateral direction X does not act strongly (initially) on the inner end portion 74. It is not.

  The same effect can be obtained by arranging the joining portions 75 so densely that the non-joining portions 76 do not substantially exist in the entire boundary joining region 70 and increasing the peel strength in all directions at the inner and outer end portions 73 and 74. In this case, since the sheet member welded at the joint portion 75 is cured, the rigidity of the entire joint boundary area 70 becomes excessively high, which may give the wearer an uncomfortable feeling. Therefore, as in the present embodiment, the outer end joints 75A and 75B are independent so that the inner end 74 has higher peel strength in the vertical direction Y and the outer end 73 has higher peel strength in the horizontal direction X. By adjusting the size, shape, arrangement pattern, distribution density, etc., the peeling strength in the direction suitable for each portion of the boundary bonding area 70 is suppressed while suppressing the rigidity of the entire boundary bonding area 70 from becoming excessively high. It can be demonstrated.

  Referring to FIG. 7A, in order to make the peel strength in the lateral direction X of the outer end portion 73 relatively high, the separation dimension R1 in the longitudinal direction Y between the outer end joint portions 75A adjacent in the longitudinal direction Y is referred to. Is preferably as small as possible. For example, the separation dimension R1 is preferably 1.0 to 2.0 mm. On the other hand, when the separation dimension R2 in the lateral direction X between adjacent outer end joints 75A in the lateral direction X is small, when the sheet breaks from the boundary line 31c, the outer end joint 75A is connected to the sheet. There is a possibility that the fracture line extends outward in the lateral direction X. Therefore, it is preferable that the separation dimension R2 in the lateral direction X between the outer end joint portions 75A is as large as possible. Specifically, it is preferably at least 1.5 mm or more and 1.5 to 3.5 mm. .

  Referring to FIG. 7B, in order to make the peel strength in the longitudinal direction Y of the inner end portion 74 relatively high, the separation dimension R3 in the lateral direction X between the inner end joint portions 75B adjacent in the lateral direction X is referred to. Is preferably as small as possible. Specifically, the separation dimension R3 is preferably 0.5 to 1.5 mm. On the other hand, when the separation dimension R4 in the vertical direction Y between the adjacent inner end joints 75B in the vertical direction Y is small, when the sheet tears from the leg opening 17 side, the inner end joint 75B is connected to the sheet. There is a risk that the breaking line of the above will extend upward. Therefore, the separation dimension R4 in the longitudinal direction Y between the inner end joining portions 75B is preferably as large as possible, and specifically, it is preferably at least 1.0 mm or more and in the range of 1.0 to 3.0 mm.

  The base end portion 31 further includes a corner joint region 90 formed of a portion excluding the boundary side joint region 70. The corner joint region 90 has a substantially triangular shape defined by the outer end edge 31 a and the outer edge 14 c of the base end portion 31 and the outer edge 70 a of the boundary side joint region 70. The entire region of the base end portion 30 is joined via a joining region 38 formed by applying a hot melt adhesive. In addition to the bonding area 38, the boundary-side bonding area 70 is provided with bonding portions 75A and 75B to which sheet members are welded. Therefore, the bonding strength of the corner bonding area 90 is lower than that of the boundary-side bonding area 70. Has strength. When the first connecting member 30 is gripped and worn, the tensile forces F <b> 1 to F <b> 3 directed in the three directions i) to iii) act on the boundary-side joint region 70, but the force applied to the corner joint region 90. Does not act, or even if it acts, it is a relatively small force, so even if the bonding strength is relatively low, the base end portion 31 will not be peeled off. Further, by not arranging the joint portions 75A and 75B in the entire base end portion 31 in this way, it is possible to prevent the base end portion 30 from becoming excessively rigid and losing flexibility.

  The joining portion 75 of the boundary side joining region 70 may be formed by various known welding means such as ultrasonic processing and heat sealing processing, or by locally disposing an adhesive having a relatively high mass. It may be formed. However, when each sheet is bonded only with an adhesive in the vicinity of the boundary line 31c, when peeling occurs at the boundary line 31c, the adhesive adhesive is exposed, and the clothes become dirty or hardened. There is a possibility that the adhesive touches the skin and gives irritation, but such a situation can be prevented by forming a seal region along the boundary line 31c. Moreover, the structure which does not apply | coat an adhesive agent to a seal | sticker area | region may be sufficient, and in such a case, the weldability of sheets can be improved. In addition, when the relatively small joint 75 is formed by heat sealing, the tip of the heat embossing pin may be sharpened and the sheet may be torn during the manufacturing process. However, it is formed by ultrasonic processing. In this case, even such a small joining portion 75 can be controlled and manufactured so that the sheet is not broken.

  Although not shown, the inner end joint portion 75B located at the inner end portion 74 is larger than the outer end joint portion 75A located at the outer end portion 73, and the total area of the inner end joint portion 75B is the outer end joint portion. It is preferably greater than that of 75A. In such a case, the bonding strength of the inner end portion 74 is higher than the bonding strength of the outer end portion 73, and even if a force is applied to the inner end portion 74 during the wearing operation, it is easily peeled off. Never do.

  A plurality of intermediate joint portions 75C having a rectangular shape are arranged in the intermediate portion 80 in the same manner as the lower end joint portion 75B. The intermediate joint 80 is arranged side by side in the length direction K. Since the intermediate joint portion 80 is arranged side by side in the length direction K, the peel strength against the force F3 pulling in the direction orthogonal to the length direction K is high. However, the intermediate joints 80 may be arranged side by side in the vertical direction Y and / or the horizontal direction X, and the boundary side can be changed by appropriately changing the shape, arrangement pattern, etc. of the joints arranged in the intermediate part 80. It is possible to appropriately control the rigidity of the entire bonding area 70 and the peel strength in a certain direction.

<Modification 1>
FIG. 9 is a view similar to FIG. 6 of Modification 1 as an example of the modification, and FIG. 10A is a partially enlarged view of the outer end portion 73 of the boundary side joining area 70 in Modification 1. b) A partially enlarged view of the inner end 74 of the boundary-side joining area 70.

  Referring to FIGS. 9 and 10 (a) and 10 (b), in this modification, the outer and inner end joints 75A and 75B have the same shape and the same dot shape, and the outer end joint 75A A plurality of inner end joint portions 75B are arranged in the horizontal direction X.

Figure 10 Referring to (a), has a diameter D and the same width of any of the outer end joint 75A, the number of the outer end joint 75A located longitudinal region S ₁ extending in the longitudinal direction Y is the is five respect, the transverse area S ₂ is part of any of the outer end joint 75A and the other two outer ends joint 75A is only located. Referring also to FIG. 10 (b), the has a diameter identical to the width of any inner end joints 75B, inner end joint 75B located in a transverse zone S ₃ region whereas is five, longitudinal zone some of the two inner end junction 75B of the other and any inner end joint 75B is in the S ₄ is only positioned.

  The outer end portion 73 forms a joint portion group composed of a plurality of outer end joint portions 75A arranged in the longitudinal direction Y, and the inner end portion 74 has a plurality of inner end joint portions 75B arranged in the horizontal direction. The joint part group comprised from these can be formed. The outer end joint portion 75A and the inner end joint portion 75B have the same shape and size, and the joint portion group of the inner end portion 74 extends in the horizontal direction X, while the joint portion group of the outer end portion 73 extends in the vertical direction Y. Therefore, the peel strength in the longitudinal direction Y of the inner end portion 74 is higher than that of the outer end portion 73, and the peel strength in the lateral direction X of the outer end portion 73 is higher than that of the inner end portion 74. I can say that. Further, at the inner end portion 74, the peel strength in the vertical direction Y is higher than the peel strength in the horizontal direction, and at the outer end portion 73, the peel strength in the horizontal direction X is higher than the peel strength in the vertical direction Y. Yes.

<Modification 2>
FIG. 11 is a diagram similar to FIG. 6 of Modification 2 which is an example of Modification.

  Referring to FIG. 11, in the present modification, a plurality of outer end joints 75 </ b> A extending in the longitudinal direction Y and spaced apart from each other in the lateral direction X are separated from the outer edge 70 a of the boundary side joining region 70. It extends continuously to the boundary line (inner edge) 31c. Further, in the inner end portion 74, a plurality of inner end joint portions 75B that are separated from each other in the vertical direction Y and extend in the lateral direction X are continuous from the outer edge 70a to the boundary line (inner edge) 31c of the boundary side joint region 70. It extends. The number, the separation dimension, and the total area of the outer end joint 75A and the inner end joint 75B are substantially the same. Also in the arrangement pattern of the outer inner end joint portions 75A and 75B, the inner end joint portion 74B extends in the horizontal direction X, while the outer end joint portion 75B extends in the vertical direction Y. It can be said that the peel strength in the direction Y is higher than that of the outer end portion 73, and the peel strength in the lateral direction X of the outer end portion 73 is higher than that of the inner end portion 74. Further, at the inner end portion 74, the peel strength in the vertical direction Y is higher than the peel strength in the horizontal direction, and at the outer end portion 73, the peel strength in the horizontal direction X is higher than the peel strength in the vertical direction Y. Yes. The intermediate joint portion 75C of the intermediate portion 80 includes a longitudinal portion and an inner end joint portion that extend in the entire width dimension of the boundary side joint region 70 in the length direction of the boundary side joint region 70, similarly to the outer end joint portion 75A. Similar to 75B, it has a shape in which transverse portions extending in the lateral direction are alternately arranged. With the intermediate joint 75C having such a shape, it can be said that the intermediate portion 75C has substantially the same peel strength in the vertical direction Y and the horizontal direction X.

<Modification 3>
FIG. 12 is a diagram similar to FIG. 6 of Modification 3 which is an example of Modification.

  In the present modification, in the boundary-side joining area 70, the outer end joining portion 75A of the outer end portion 73 and the inner end joining portion 75B of the inner end portion 74 are each in the longitudinal direction Y from the outer edge 70a to the boundary line 31c. And a plurality of transverse portions extending in the lateral direction. The width and width of the vertical section and the cross section of the outer and inner end joints 75A and 75B are the same. In the outer end 73, the number of vertical sections is greater than the number of the cross sections, and the inner end 74 has The number of crossing portions is larger than the number of longitudinal portions. Also in the arrangement pattern of the outer inner end joint portions 75A and 75B, the area of the transverse portion of the inner end joint portion 74B is larger than the area of the transverse portion of the outer end joint portion 75A, and the outer end joint portion 75A Since the area of the longitudinal section is larger than the area of the longitudinal section of the inner end joining portion 75B, the peel strength in the longitudinal direction Y of the inner end portion 74 is higher than that of the outer end portion 73, and the outer end portion It can be said that the peel strength of 73 in the lateral direction X is higher than that of the inner end portion 74. Further, at the inner end portion 74, the peel strength in the vertical direction Y is higher than the peel strength in the horizontal direction, and at the outer end portion 73, the peel strength in the horizontal direction X is higher than the peel strength in the vertical direction Y. Yes.

  As described above, in the embodiment and each modified example, the diaper 10 is configured so that peeling does not occur due to the plurality of tensile forces F1 to F3 that act on the boundary-side joining area 70 during wearing and wearing operation. The size, shape, combination, and arrangement pattern of the joint 75 are changed for each part. As a result, peeling of the joint portion 75 is suppressed, but in order to prevent such peeling, the maximum tensile strength of the entire boundary-side joining region 70 of the connecting member 30 is preferably at least 60N. Further, the peel strength in the direction perpendicular to the length direction K in the entire boundary-side joining region 70 (average value of the inner and outer end portions 73 and 74 and the intermediate portion 80), and the peel strength in the lateral direction X at the outer end portion 73 The peel strength in the longitudinal direction Y at the inner end 74 is preferably at least 10 N / 25 mm, and preferably 15 N / 25 mm or more.

<Method for measuring peel strength of connecting member>
FIGS. 13A to 13C are views showing a state before and after the connecting member 30 is extended in the lateral direction X. FIG. FIG. 13A is a diagram showing a state of a sample to be cut out with respect to a method for measuring the peel strength in the direction orthogonal to the boundary side joining area 70, and FIG. 13B is the peeling in the lateral direction X of the boundary side joining area 70. The figure which shows the mode of the sample to cut out regarding the measuring method of intensity | strength, FIG.13 (c) is a figure which shows the mode of the sample to cut out regarding the measuring method of the peeling strength of the vertical direction Y of the boundary side joining area | region 70. FIG. FIG. 14A is a diagram illustrating a state in which the sample cut out in FIG. 13A is set in a tensile tester, and FIG. 14B is a diagram in which the sample cut out in FIG. 13B is set in a tensile tester. FIG. 14C is a diagram showing a state in which the sample cut out in FIG. 13C is set in a tensile tester. Here, the “peeling strength of the connecting member 30” means the maximum tensile force (N / 25 mm) from when the peeling of the connecting member 30 starts until the connecting member 30 completely separates from the diaper body 14. To do.

  Each measurement of the peeling strength of the connection member 30 was measured using the autograph tester (AG-X10plus) by Shimadzu Corporation.

<Peel strength in orthogonal direction>
Referring to FIGS. 13A and 14A, in the state where the connecting member 30 is expanded in the lateral direction X, the elongated rectangular piece that extends in the direction orthogonal to the length direction K intersecting the boundary line 31c is a diaper. A sample was cut out from 10. The sample has a width of 25 mm, and includes a first portion 93 where the free portion 32 and the base end portion 31 of the connecting member overlap each other, and a second portion 94 formed from the diaper body 14. The first portion 93 and the second portion 94 have the same shape and the same size, and overlap each other in the thickness direction Z before the connecting member 30 is deployed. In the cut out sample, the sheet piece 93a formed from the free portion 32 of the first portion 93 is held by one chuck (movable jig) 95, and the second portion 94 is held by the other chuck (fixed jig) 96. The sample was set on an autograph tester while being gripped on the surface, and the peel strength (maximum strength) of the sample at a pulling speed of 1000 mm / min was determined. When the chuck width is about 50 mm and the sample cannot be cut out with a width of 25 mm, the sample is converted into a width of 25 mm based on the measurement result. As shown in FIG. 13 (a), samples are cut out at the upper and lower end portions 73 and 74 and the intermediate portion 80, the peel strengths in the respective orthogonal directions are obtained, and the average value is taken as the peel strength in the direction perpendicular to the boundary joining region ( N / 25 mm).

<Lateral peel strength>
13 (b) and 14 (b), in the vicinity of the inner and outer end portions 73 and 74 in a state where the connecting member 30 is expanded in the lateral direction X, an elongated rectangle that extends in the lateral direction X intersecting the boundary line 31c. A piece was cut out from the diaper 10 and used as a sample. The sample has a width of 25 mm, and includes a first portion 93 where the free portion 32 and the base end portion 31 of the connecting member overlap each other, and a second portion 94 formed from the diaper body 14. The first portion 93 and the second portion 94 partially overlap each other in the thickness direction Z before the connecting member 30 is deployed. In the cut out sample, the sheet piece 93a formed from the free portion 32 of the first portion 93 is held by one chuck (movable jig) 95, and the second portion 94 is held by the other chuck (fixed jig) 96. The sample was set in an autograph tester while being held in a grip, and the peel strength in the transverse direction X (N / 25 mm) was measured under the same conditions as the measurement of the peel strength in the orthogonal direction.

<Vertical peel strength>
13 (c) and 14 (c), in the state before extending the connecting member 30, an elongated rectangular piece that intersects the boundary line 31c and extends in the longitudinal direction Y is cut out from the diaper 10 and used as a sample. . The sample has a width of 25 mm, and includes a first portion 97 composed of the base end portion 31 of the connecting member 30 and a second portion 98 where the free portion 32 and the diaper main body 14 overlap each other. In a state where the connecting member 30 is relaxed and extended outward in the longitudinal direction Y, the first sheet piece 98a formed of the free portion 32 and the second sheet piece 98b formed of the diaper body 14 are mutually connected. It is in a separated state. With the first sheet piece 98a gripped by one chuck (movable jig) 95 and the second sheet piece 98b gripped by the other chuck (fixed jig) 96, the sample was set in an autograph tester, The sample was measured under the same conditions as the measurement of the peel strength in the orthogonal direction, and the peel strength (N / 25 mm) in each longitudinal direction was determined.

  For each constituent member constituting the diaper 10 of the present invention, various known materials that are usually used in this type of article can be used without limitation in addition to the materials described in the specification. In the specification and claims, terms such as “first” and “second” are used to simply distinguish similar elements, positions, and the like.

  The disclosure relating to the present invention described above can be organized into at least the following matters.

A crotch region having a longitudinal direction and a lateral direction, a first waist region that is one of the front and rear waist regions, a second waist region that is the other of the front and rear waist regions, and a crotch region that is located between the first and second waist regions And a pair of connecting members for connecting the first waist region and the second waist region, wherein the pair of connecting members are respectively the first waist region. A base end portion fixed to the base end portion and a free portion extending from the base end portion toward the second waist region, and a boundary line between the base end portion and the free portion extends from the crotch region. It inclines so that it may go to an inner side from the lateral direction outside to the waist opening side, the base end part has a boundary side joint area extended along the boundary line, and the boundary side joint area is the waist Outer end located on the opening side , And a inner end located on the crotch region side, the peel strength of the longitudinal direction of the inner end is rather higher than the peel strength of the longitudinal direction of the outer end portion, in the inner end The longitudinal peel strength is at least 10 N / 25 mm .

The present invention disclosed in the above paragraph can include at least the following embodiments. The embodiments can be adopted separately or in combination with each other.
(1) The peel strength in the lateral direction at the outer end portion is higher than the peel strength in the lateral direction at the inner end portion.
(2) The longitudinal peel strength at the inner end portion is at least 10 N / 25 mm.
( 3 ) The inner end portion has a plurality of joint portions arranged to be separated from each other.
( 4 ) The outer end portion has a plurality of joint portions arranged to be separated from each other.
(5) within said end portion, the separation dimension between the junction portions adjacent in the longitudinal direction is greater than the spaced distance between the joint portions adjacent in the transverse direction.
( 6 ) In the said outer end part, the separation dimension between the said junction parts adjacent in the said horizontal direction is larger than the separation dimension between the said junction parts adjacent in the said vertical direction.
( 7 ) The base end portion further includes a corner joint region including a portion excluding the boundary side joint region, and the corner joint region has a joint strength lower than that of the boundary side joint region.
( 8 ) The corner joint area has a substantially triangular shape defined by an edge and an outer edge of the base end part and an outer edge of the boundary side joint area.

10 Disposable wearing articles (disposable diapers)
11 Front waist area (first or second waist area)
12 Rear waist area (first or second waist area)
DESCRIPTION OF SYMBOLS 13 Crotch area 14 Diaper main body 16 Waist opening 30 Connection member 31 Base end part 31a End edge of base end part 31c Boundary line 32 Free part 70 Boundary side joining area 70a Outer edge of boundary side joining area 73 Outer end part 74 Inner end part 75 Joining portion 75A Outer end joining portion 75B Inner end joining portion 75C Intermediate joining portion 76 Non-joining portion 90 Corner joining region K Length direction of boundary side joining region R1 Vertical spacing dimension of outer end joining portion R2 Outer end joining Horizontal separation distance R3 Inner end joint horizontal separation dimension R4 Inner end joint vertical separation dimension X Horizontal direction Y Vertical direction

Claims (9)

A crotch region having a longitudinal direction and a lateral direction, a first waist region that is one of the front and rear waist regions, a second waist region that is the other of the front and rear waist regions, and a crotch region that is located between the first and second waist regions In a disposable wearing article comprising a diaper body having a pair of connecting members for connecting the first waist region and the second waist region,
Each of the pair of connecting members has a base end fixed to the first waist region and a free part extending from the base end toward the second waist region.
The boundary line between the base end part and the free part is inclined so as to go from the crotch region toward the waist opening side toward the inside from the outside in the lateral direction,
The proximal end portion has a boundary-side joining area extending along the boundary line,
The boundary side joining area has an outer end located on the waist opening side and an inner end located on the crotch area side, and the peel strength in the longitudinal direction at the inner end is determined by the outer end. rather higher than the peel strength of the longitudinal direction in the section,
The wearing article, wherein the longitudinal peel strength at the inner end is at least 10 N / 25 mm .   The wearing article according to claim 1, wherein the lateral peel strength at the outer end portion is higher than the lateral peel strength at the inner end portion. The wearing article according to claim 1 or 2 , wherein the lateral peel strength at the outer end portion is at least 10 N / 25 mm. The said inner end part is a wearing article in any one of Claims 1-3 which has several joining parts arrange | positioned mutually spaced apart. The said outer end part is a wearing article in any one of Claims 1-4 which has several joining parts arrange | positioned mutually spaced apart. In the inner end portion, the separation dimension between the junction portions adjacent in the longitudinal direction, wearing article according to claim 4 is greater than the separation dimension between the junction portions adjacent in the transverse direction. In the outer end, the separation dimension between the junction portions adjacent in the lateral direction, wearing article according to claim 5 greater than the spaced distance between the joint portions adjacent in the longitudinal direction. It said proximal portion further includes a corner junction region consisting of a portion excluding the boundary side junction region, the corner junction zone, any bonding strength than the boundary side junction region is lower claims 1-7 The wearing article according to crab. The wearing article according to claim 8 , wherein the corner joint region has a substantially triangular shape defined by an edge and an outer edge of the base end portion and an outer edge of the boundary side joint region.

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