JP5685238B2 - Disposable diaper and method for producing elastic sheet - Google Patents

Description

  The present invention relates to a disposable diaper. Moreover, this invention relates to the manufacturing method of the elastic sheet used for this disposable diaper.

  Conventionally, there is an unfoldable disposable diaper in which a stretchable side panel that extends and contracts in the width direction of the absorbent main body is attached to a portion of the absorbent main body including the absorbent body that is disposed on the back side of the wearer when worn. Known (see Patent Documents 1 and 2). This type of disposable diaper can be manufactured by adding the side panel to the absorbent main body in a separate process from the absorbent main body. Waste generated from materials can be reduced, which is superior in terms of environment and cost. As the side panel, one in which a thread-like elastic body is arranged in an expanded state between two panel sheets made of a nonwoven fabric or the like and bonded and fixed with an adhesive is used.

JP 2008-295836 A JP 2012-115361 A

However, when the fastening tape or the like provided at the tip of the side panel is pulled and the diaper is attached, if the tension is excessive, the thread-like elastic body in the side panel may be peeled off from the panel sheet.

  Therefore, the subject of this invention is providing the disposable diaper which the performance of the side panel improved rather than before.

The present invention relates to an absorbent body including an absorbent body, a skin-side sheet disposed on the inner surface side of the absorbent body and a non-skin-side sheet disposed on the outer surface side of the absorbent body, and one or both of the absorbent body A disposable diaper with a stretchable side panel attached to the side of the
The side panel is provided with a fastening tape at the tip, and has first and second two panel sheets and an elastic member fixed in an extended state between the two panel sheets. ,
The elastic member is fixed to both the first and second panel sheets at or near the end on the absorbent main body side and at or near the end on the tip side of the side panel,
(A) Of the first and second panel sheets, at least the first panel sheet has a main body side laminated structure portion in which an end portion on the absorbent main body side is folded inside the side panel. ,
In the main body side laminated structure part, an adhesive is applied between the first panel sheets facing each other by folding, and a main body side interlayer adhesive layer is formed,
The main body side interlayer adhesive layer has a main body side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the main body side laminated structure portion,
The elastic member includes a main body side extending adhesive layer and a main body side adhesive layer positioned on the second panel sheet side and fixing an end of the absorbent main body side or the vicinity thereof. It is fixed to both the first and second panel sheets, or (b) Of the first and second panel sheets, at least the first panel sheet has an end on the tip side of the side panel, It has a tip side laminated structure part that is folded inside the side panel,
In the tip side laminated structure portion, an adhesive is applied between the first panel sheets facing each other by folding, and a tip side interlayer adhesive layer is formed,
The tip side interlayer adhesive layer has a tip side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the tip side laminated structure portion,
The elastic member includes the front end side extended adhesive layer and a front end side adhesive layer that is located on the second panel sheet side and that fixes the end portion on the front end side of the side panel or the vicinity thereof. The disposable diaper currently fixed to both the 1st and 2nd panel sheet | seat is provided.

The present invention also includes a step of conveying a pair of belt-like sheets, and a band-like elastic body disposed between the belt-like sheets in a direction intersecting the conveyance direction of the belt-like sheets, and the belt-like shape along the belt-like sheet conveyance direction. In each of the one side part and the other side part of the sheet, a method for producing an elastic sheet comprising a step of fixing the thread-like elastic body to both of the pair of belt-like sheets in an extended state,
For one of the pair of belt-like sheets, an adhesive is applied along at least one of the one side and the other side of the belt-like sheet along the transport direction of the belt-like sheet along the transport direction. Work,
The side part coated with the adhesive is folded so that the adhesive is on the inside to form a laminated structure part,
A step of fixing the thread-like elastic body in an extended state between the other belt-like sheet and the one belt-like sheet having the laminated structure portion in a direction intersecting the conveying direction of these belt-like sheets;
Production of a stretchable sheet in which one of the belt-like sheets is folded so that a part of the adhesive is exposed at the time of forming the laminated structure portion, and the thread-like elastic body is fixed by the adhesive exposed after the folding. A method is provided.

  In the disposable diaper of the present invention, since the elastic member arranged in the side panel is securely fixed to the panel sheet, even if the side panel is pulled when the diaper is attached, the elastic member is hardly peeled off. .

FIG. 1: is the expansion | deployment top view which looked at the disposable diaper which is one Embodiment of this invention from the surface sheet side. FIG. 2 is a perspective view showing a wearing state of the disposable diaper shown in FIG. 1. FIG. 3 is an enlarged plan view showing a side panel of the disposable diaper shown in FIG. 1 and the vicinity thereof. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view showing another form of the diaper shown in FIG. FIG. 6 is a perspective view showing an example of a method for manufacturing a side panel in the disposable diaper of the embodiment shown in FIG. 1.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The disposable diaper 1 of the embodiment shown in FIG. 1 (hereinafter also referred to as diaper 1) includes an absorbent body 2 including an absorbent body 23 and a skin-side sheet 21 disposed on the inner surface side of the absorbent body 23, and the absorbent body. Side panels 3 and 3 attached to both sides of the main body 2 are provided.

  The absorptive main body 2 has a vertically long shape as shown in FIG. 1, and when worn, the abdominal side A located on the abdomen side of the wearer, the dorsal side part B located on the dorsal side of the wearer, and the crotch The crotch part C located in the part is provided. The absorptive main body 2 has a rectangular shape in a state where it is expanded in a planar shape as shown in FIG. The side panels 3 and 3 are attached to both side portions of the absorbent main body 2 in the back side portion B so as to protrude outward from both side edge portions of the absorbent main body 2.

  The longitudinal direction of the disposable diaper 1 is the Y direction in the figure, and is the same direction as the longitudinal direction of the absorbent main body 2. The width direction of the disposable diaper 1 is the X direction in the figure, and is the same direction as the width direction of the absorbent main body 2. In the following description, the longitudinal direction of the diaper or the direction corresponding to the longitudinal direction of the diaper component is simply the Y direction, the width direction of the diaper or the direction corresponding to the diaper width direction of the diaper component is simply X. Also called direction. Moreover, the inner surface in the component member of a diaper and a diaper is a surface which faces a wearer's skin side at the time of wear, and the outer surface in the component member of a diaper or a diaper is a side opposite to a wearer's skin at the time of wear. The surface is directed to the non-skin side.

  As shown in FIGS. 1 and 4, the absorbent main body 2 includes a skin-side sheet 21 that forms the inner surface of the absorbent main body 2, a non-skin-side sheet 22 that forms the outer surface of the absorbent main body 2, and both the sheets 21. , 22 and a liquid retaining absorber 23 interposed between them. The skin-side sheet 21 includes a liquid-permeable surface sheet 21a and a pair of three-dimensional guard forming sheets 21b and 21b bonded to both sides thereof. The liquid-permeable surface sheet 21 a is arranged at the center in the width direction of the absorbent main body 2 so as to cover the entire length of the absorbent main body 2. The three-dimensional guard forming sheets 21b, 21b are respectively disposed along the longitudinal direction on both sides of the absorbent main body 2 in the longitudinal direction. The three-dimensional guard forming sheets 21b and 21b are joined to the top sheet 21a via adhesive layers 68 and 69, and constitute the skin side sheet 21 together with the top sheet 21a.

  The adhesive layer 68 is formed over substantially the entire length of the absorbent main body 2. On the other hand, the adhesive layer 69 is provided on the stomach side A and the back side B, but not on the crotch C.

  Each solid guard forming sheet 21b has a solid guard forming elastic member 25 in the vicinity of the inner edge in the width direction (X direction) of the absorbent main body 2 along the edge. When the diaper 1 is worn, due to the contraction force of the elastic member 25, a portion of the crotch part C, which is located on the inner side of the adhesive layer 68, stands up and separates from the top sheet 21a to form a three-dimensional guard. .

  The non-skin side sheet 22 is a liquid-impervious or liquid-impervious (including water repellency) leak-proof sheet 22a, and an outer layer bonded to the outer surface side of the leak-proof sheet 22a through an outer adhesive layer 61. It consists of a composite sheet having a nonwoven fabric 22b. The outer layer nonwoven fabric 22b has the same shape as the absorbent main body 2 in plan view. As shown in FIG. 4, the leak-proof sheet 22 a has the same planar view shape as the outer-layer nonwoven fabric 22 b except that the width in the X direction is slightly smaller. Due to the presence of the outer layer non-woven fabric 22b, the diaper 1 has a good touch on the outer surface.

  The elastic members 26 for forming leg gathers are sandwiched by the two-layer structure portion of the three-dimensional guard forming sheet 21b and fixed in an extended state at portions arranged around the legs on both sides in the longitudinal direction of the absorbent main body 2. ing.

  As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to the longitudinal center line CL of the absorbent main body 2. Therefore, the configuration of the side panels 3 and 3 and the manner of joining them with the absorbent main body 2 and the fastening tape 4 will be described mainly using the left side panel in FIG. 1 as an example, but the right side panel is also left and right. It is the same except that it becomes symmetrical.

  As shown in FIG. 3, the side panel 3 in the diaper 1 has a rectangular shape in a state where the side panel 3 is expanded in a planar shape. As shown in FIG. 4, the side panel 3 has two panel sheets made of nonwoven fabric, that is, a first panel sheet 31 and a second panel sheet 32, and a diaper width direction (X direction) between the two panel sheets 31 and 32. And a plurality of elastic members 33 fixed in an extended state. The first panel sheet 31 is disposed on the outer surface side of the diaper 1. The second panel sheet 32 is disposed on the inner surface side of the diaper 1. Hereinafter, the first panel sheet 31 and the second panel sheet are also simply referred to as a panel sheet 31 and a panel sheet 32 for convenience.

  A fastening tape 4 for fastening the side panel 3 to another part (for example, a landing zone 5 provided on the outer surface of the abdominal part A) is provided at the distal end portion 3a of the side panel 3. The front end portion 3a of the side panel 3 is an end portion of the side panel 3 opposite to the absorbent main body 2 side. On the other hand, the end of the side panel 3 on the absorbent main body side (hereinafter also referred to as the base end 3 b) is joined to the absorbent main body 2.

  The elastic members 33 are thread-like, and are arranged along the width direction (X direction) of the diaper 1. In addition, the plurality of elastic members 33 in each side panel 3 are arranged at substantially equal intervals in the longitudinal direction (Y direction) of the diaper.

  As shown in FIGS. 3 and 4, the side panel 3 includes a main body side adhesive layer 35, a tip end side adhesive layer 36, and a plurality of intermediate adhesive layers 37. These adhesive layers 35, 36, and 37 are all formed so as to extend in the diaper longitudinal direction (Y direction). In these adhesive layers 35, 36, and 37, a plurality of elastic members 33 are fixed to at least the second panel sheet 32 via an adhesive that constitutes each adhesive layer. That is, the adhesive layers 35, 36, and 37 are located at least on the second panel sheet 32 side.

  In the side panel 3, the two panel sheets 31 and 32 are directly joined to each other through an adhesive constituting each adhesive layer at a portion where the elastic member 33 is not interposed. In FIG. 3, the main body side adhesive layer 35, the front end side adhesive layer 36, and the plurality of intermediate adhesive layers 37 are indicated by hatching with diagonal lines directed to the lower left of the figure.

  The main body side adhesive layer 35 is provided on the side of the absorbent main body 2 in the extending direction of the side panel 3, and the end of the individual elastic member 33 on the side of the absorbent main body 2 or the vicinity thereof is connected to the side panel 3. It fixes from the inner surface P side toward the outer surface Q side. The front-end-side adhesive layer 36 is provided on the front-end portion 3a side in the extending direction of the side panel 3, and the end portion of each elastic member 33 on the front-end portion 3a side of the side panel 3 or the vicinity thereof is The panel 3 is fixed from the inner surface P side to the outer surface Q side.

  As shown in FIG. 4, the main body side adhesive layer 35 does not reach the edge of the side panel 3 on the side of the absorbent main body 2, and the side panel 3 is placed between the panel sheets 31 and 32 on the base end portion 3 b. Has a non-bonded region on the main body side in a non-bonded state. Moreover, the front end side adhesive layer 36 does not reach the edge of the side panel 3 on the fastening tape 4 side, and the side panel 3 is not joined between the panel sheets 31 and 32 to the front end portion 3a. The front end side non-adhesive region is provided. The base end portion 3b of the side panel 3 in the present embodiment includes the whole or a part of the portion where the main body side adhesive layer 35 is interposed between the panel sheets 31 and 32 and the main body side non-adhesive region. On the other hand, the front end portion 3a of the side panel 3 includes the whole or a part of the portion where the front end side adhesive layer 36 is interposed between the panel sheets 31 and 32 and the front end side non-adhesive region.

  A plurality of intermediate adhesive layers 37 are provided in the intermediate region 30 which is a region between the main body side adhesive layer 35 and the front end side adhesive layer 36 in the extending direction of the side panel 3. The intermediate adhesive layer 37 is smaller in width than both the adhesive layers 35 and 36 and is formed in a plurality of intermittently in the intermediate region 30. In other words, the main body side adhesive layer 35 and the tip side adhesive layer 36 are formed wider than the intermediate adhesive layer 37. In the extending direction of the side panel 3, between the main body side adhesive layer 35 and the adjacent intermediate adhesive layer 37, between the adjacent intermediate adhesive layers 37, and between the front end side adhesive layer 36 and it. Between the intermediate adhesive layers 37, non-adhesive regions 38 where no adhesive is disposed are formed. In the diaper 1 of this embodiment, the extending direction of the side panel 3 coincides with the diaper width direction.

  The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 all intersect with a plurality of (more preferably three or more) elastic members 33 extending in the X direction so that the length of the diaper 1 is longer. It extends in the direction (Y direction). The main body side adhesive layer 35, the front end side adhesive layer 36 and the intermediate adhesive layer 37 all cross all the elastic members 33 extending in the X direction and extend in the longitudinal direction (Y direction) of the diaper 1. It is preferable that it extends over the entire length between the upper and lower edges 3u, 3d of the side panel 3.

  Similarly, the non-bonding region 38 also extends in the longitudinal direction (Y direction) of the diaper 1 across a plurality of (more preferably 3 or more) elastic members 33 extending in the X direction. The non-bonding region 38 also preferably extends in the longitudinal direction (Y direction) of the diaper 1 across all the elastic members 33 extending in the X direction, and extends over the entire length between the upper and lower edges 3u, 3d of the side panel 3. More preferably.

  In the diaper 1, the first panel sheet 31 disposed on the outer surface Q side of the two panel sheets 31 and 32 constituting the side panel 3 is absorbed by the first panel sheet 31 on the absorbent main body 2 side. The main body side laminated structure portion 31 </ b> A has a two-layered structure in which the end on the side of the conductive main body 2 is folded inward. “Folded inward” means the inner side with respect to the side panel 3 and means that the first panel sheet 31 and the second panel sheet 32 are folded back to the opposite side. In the main body side laminated structure portion 31A, an adhesive is applied between the first panel sheets 31 facing each other by folding, and a main body side interlayer adhesive layer 31a is formed. The adhesive 31a is applied to substantially the entire area of the first panel sheet 31 that is opposed by folding.

  Further, the first panel sheet 31 has a two-layer front end side laminated structure portion 31 </ b> B in which an end portion on the front end side of the first panel sheet 31 is folded inward on the front end side of the side panel 3. . The meaning of “folded inward” is the same as described above. In the front end side laminated structure portion 31B, an adhesive is applied between the first panel sheets 31 facing each other by folding, and a front end side interlayer adhesive layer 31b is formed. The adhesive 31b is applied to substantially the entire area of the first panel sheet 31 that is opposed by folding.

  As described above, in the first panel sheet 31, both the end on the absorbent main body 2 side and the end on the front end side of the side panel 3 are folded back inward, so that the main body side laminated structure portion 31A and the front end side laminated A structural portion 31B is formed. In contrast, the second panel sheet 32 located on the inner surface P side of the side panel 3 is folded back at both the end on the absorbent main body 2 side and the end on the front end side of the side panel 3. Not.

  In the main body side laminated structure portion 31A of the first panel sheet 31, the main body side interlayer adhesive layer 31a extends beyond the main body side laminated structure portion 31A toward the center side in the width direction X of the side panel 3. Yes. By this extension, a main body side extended adhesive layer 31a 'is formed. The main body side extending adhesive layer 31 a ′ is not covered with the first panel sheet 31, and the main body side extending adhesive layer 31 a ′ is exposed toward the inner surface P side of the side panel 3. Then, the exposed main body side extending adhesive layer 31a ′ has the end portion of each elastic member 33 on the absorbent main body 2 side or the vicinity thereof directed from the outer surface Q side to the inner surface P side of the side panel 3. Are fixed.

In the front end side laminated structure portion 31B of the first panel sheet 31, the front end side interlayer adhesive layer 31b extends beyond the front end side laminated structure portion 31B toward the center side in the width direction X of the side panel 3. Yes. By this extension, a tip side extension adhesive layer 31b ′ is formed. Distal end side extending adhesive layer 31b 'are not covered by the first panel sheet 31, the distal end side extending adhesive layer 31b' is exposed toward an inner surface P side of the side panel 3. The exposed front end side extended adhesive layer 31 b ′ is configured so that the end portion of each elastic member 33 on the front end portion side of the side panel 3 or the vicinity thereof is located on the inner surface P side from the outer surface Q side of the side panel 3. It is fixed toward.

  In the side panel 3, the formation position of the main body side extending adhesive layer 31 a ′ and the formation position of the main body side adhesive layer 35 overlap in the thickness direction of the diaper 1. In the side panel 3, on the side of the absorbent main body 2, the individual elastic members 33 are fixed from the first panel sheet 31 side by the main body side extending adhesive layer 31a ', and the main body side adhesive layer 35 is provided. Is fixed from the second panel sheet 32 side. That is, the individual elastic members 33 are fixed to both the first and second panel sheets 31 and 32. Similarly, in the side panel 3, the formation position of the distal end side extended adhesive layer 31 b ′ and the formation position of the distal end side adhesive layer 36 overlap in the thickness direction of the diaper 1. In the side panel 3, the individual elastic members 33 are fixed from the first panel sheet 31 side by the front end side extending adhesive layer 31b ′ on the front end side of the side panel 3, and the front end side adhesive is used. The layer 36 is fixed from the second panel sheet 32 side. That is, the individual elastic members 33 are fixed to both the first and second panel sheets 31 and 32. As described above, the individual elastic members 33 are fixed to both the first and second panel sheets 31 and 32 at the end of the absorbent main body 2 or in the vicinity thereof, and at the front end side of the side panel 3. The first and second panel sheets 31 and 32 are also fixed at the end portion or in the vicinity thereof. Therefore, in the diaper 1 of the present embodiment, the individual elastic members 33 arranged in the side panel 3 are securely fixed to the first and second panel sheets 31 and 32. Therefore, when the diaper 1 is mounted, Even if the side panel 3 is pulled excessively, the elastic member 33 is hardly peeled off.

  In particular, as shown in FIG. 4, the main body side extending adhesive layer 31 a ′ and the main body side adhesive layer 35 preferably have the same end position on the center side in the width direction X of the side panel 3. Instead of this, or in addition to this, the front end side extended adhesive layer 31b ′ and the front end side adhesive layer 36 are provided at the end on the center side in the width direction X of the side panel 3, as shown in FIG. The positions are preferably coincident. By adopting such a configuration, there is an advantageous effect that the elastic member 33 is more securely fixed to the first and second panel sheets 31 and 32. From the viewpoint of making this effect even more remarkable, the width of the main body side extending adhesive layer 31a ′ and the width of the front end side extending adhesive layer 31b ′ in the width direction X of the side panel 3 are each independently 3 mm or more. In particular, it is preferably 5 mm or more. The upper limit value is preferably 15 mm or less, particularly preferably 10 mm or less. For example, the width is preferably 3 mm or more and 15 mm or less independently, and more preferably 5 mm or more and 10 mm or less.

  Further, as shown in FIG. 4, the main body side adhesive layer 35 is formed across the main body side extending adhesive layer 31a 'and the main body side laminated structure portion 31A. Due to this, there is an advantageous effect that the side panel 3 and the absorbent main body 2 can be more reliably fixed. Further, as shown in FIG. 4, the distal end side adhesive layer 36 is formed across the distal end side extending adhesive layer 31b 'and the distal end side laminated structure portion 31B. Due to this, there is an advantageous effect that the side panel 3 and the hook tape 4 can be more reliably fixed.

  As shown in FIG. 4, the side panel 3 in the diaper 1 of the present embodiment is a three-dimensional structure that forms part of the second panel sheet 32 and the skin side sheet 20 on the absorbent main body 2 side in the diaper width direction (X direction). It has the upper side joining part 66 to which the guard forming sheet 21b is joined. Specifically, in the upper joint portion 66, the surface facing the inner surface P side of the two surfaces of the second panel sheet 32 is joined to the three-dimensional guard forming sheet 21b via the inner surface side adhesive layer 66a. Yes. And the formation position of the upper side junction part 66 of the side panel 3 and the formation position of the main body side adhesive bond layer 35 have overlapped with the thickness direction of the diaper 1. FIG. In the case where the formation position of the upper joint portion 66 and the formation position of the main body side adhesive layer 35 overlap in the thickness direction of the diaper 1, it is advantageous in that the strength near the base of the side panel 3 can be increased. . On the other hand, when the strength near the base of the side panel 3 is sufficiently obtained, instead of this, as shown in FIG. 5, the formation position of the upper joint 66 and the formation position of the main body side adhesive layer 35 However, the form which does not overlap with the thickness direction of the diaper 1 can also be employ | adopted.

  Moreover, as shown in FIG. 4, the side panel 3 in the diaper 1 of 1st Embodiment joins the 1st panel sheet | seat 31 and the non-skin side sheet | seat 22 to the absorptive main body 2 side in a diaper width direction (X direction). The lower joint 62 is provided. In detail, in the lower side joining part 62, the surface which faces the outer surface Q side among the two surfaces of the first panel sheet 31 constitutes the non-skin side sheet 22 via the outer surface side adhesive layer 62a. It is joined to the leak-proof sheet 22a and / or the outer layer nonwoven fabric 22b. And the formation position of the lower side junction part 62 of the side panel 3 and the formation position of the main body side adhesive bond layer 35 have overlapped with the thickness direction of the diaper 1. FIG. Furthermore, the side panel 3 in the diaper 1 of 1st Embodiment is a main body side reinforced by the formation position of the lower side junction part 62 of the side panel 3, and presence of the main body side interlayer adhesive layer 31a, as shown in FIG. The formation position of the laminated structure portion 31 </ b> A overlaps in the thickness direction of the diaper 1.

  The formation position of the upper joint portion 66 of the side panel 3 and the formation position of the main body side adhesive layer 35 are overlapped in the thickness direction of the diaper 1, whereby the lower edge portion 3 d of the side panel 3 and the absorbent main body 2. Even when a force that greatly opens the angle with the side edge is applied, there is an advantageous effect that tearing hardly occurs near the base of the lower edge 3d of the side panel 3. This effect of preventing tearing becomes even more remarkable when the formation position of the lower joint portion 62 of the side panel 3 and the formation position of the main body side adhesive layer 35 overlap in the thickness direction of the diaper 1. Furthermore, an advantageous effect that tearing hardly occurs even when the formation position of the lower joint portion 62 and the formation position of the main body side laminated structure portion 31A overlap in the thickness direction of the diaper 1 is achieved.

  The effect of preventing the tear described above is that the body-side laminated structure portion 31A reinforced by the presence of the body-side interlayer adhesive layer 31a is joined to the second panel sheet 32 via the body-side adhesive layer 35, and the second panel sheet 32 is joined. The part to which the main body side adhesive layer 35 of the panel sheet 32 is bonded is joined to the three-dimensional guard forming sheet 21b (skin-side sheet 21) by the upper bonding portion 66, so that it becomes even more remarkable. In particular, the above-described tearing is that the formation position of the upper joint portion 66, the formation position of the main body side adhesive layer 35, and the formation position of the main body side interlayer adhesive layer 31a overlap in the thickness direction of the diaper 1. This is advantageous from the viewpoint of further improving the prevention effect.

Side panels 3 in the diaper 1 of this embodiment, as shown in FIG. 4, has a distal end side laminated structure portion 31B having a front end side interlayer adhesive layer 31 b, reinforce the front end side laminated structure portion by 31B The tip portion 3 a thus bonded is joined to the fastening tape 4 by the connecting adhesive layer 65. The fastening tape 4 includes a tape base material 42 and a male member of a mechanical hook-and-loop fastener that is bonded to the tape base material 42 to form a fastening portion 41. And the part which consists only of the tape base material 42 in the fastening tape 4 overlaps with the front-end | tip part 3a of the side panel 3, and is joined. In the present embodiment, the front end 3 a of the side panel 3 and the tape base material 42 are joined via a connection adhesive layer 65. As a method of fixing the male member of the mechanical hook-and-loop fastener to the tape base material 42, any joining method such as heat fusion or adhesion with an adhesive is used. In addition, the landing zone 5 (refer FIG. 2) which fixes the fastening part 41 of the fastening tape 4 is provided in the outer surface of the belly side part A of the diaper 1. As shown in FIG.

  In the middle region 30 of the side panel 3 in the disposable diaper 1 of the present embodiment, an intermediate adhesive layer 37 is formed by providing a non-adhesive region 38 between adjacent adhesive layers. In the natural state, due to the contraction of the elastic member 33, the two sheets 31 and 32 in the non-bonded region 38 swell in the direction away from the elastic member 33, and a plurality of elastic members 33 are formed on both sides of the side panel 3. A plurality of ridges (not shown) extending so as to straddle are formed. And the bag does not disappear completely even when the diaper is worn. Therefore, the part hardened by the adhesive layers 36 to 37 in the side panel 3, particularly the part hardened by the intermediate adhesive layer 37, does not easily hit the wearer's skin and does not give a sense of discomfort.

  The adhesive coating pattern that forms each of the adhesive layers described above is preferably applied to a surface using a spray gun, coater gun, or the like as an adhesive coating machine, but as an adhesive coating machine. Using a bead gun, a spiral spray gun, an omega-shaped spray gun, a transfer roll or the like, pattern coating such as a linear shape, a spiral shape, an omega shape, or a dot shape can also be performed.

  The elastic member 33 disposed on the side panel 3 has a width (dimension in the Y direction) and a diameter of preferably 0.1 mm or more from the viewpoint of improving the flexibility of the side panel 3 and ensuring stretchability. Preferably it is 2 mm or less, More preferably, it is 1 mm or less, More specifically, it is preferable that they are 0.1 mm or more and 2 mm or less, More preferably, they are 0.1 mm or more and 1 mm or less. Further, the number of elastic members 33 arranged on the side panel 3 is preferably 4 or more, more preferably 6 or more, and preferably 30 or less, more preferably 20 or less, more Specifically, it is preferably about 4 or more and 30 or less, more preferably 6 or more and 20 or less.

  The dimensions of each part in the present specification are the same as the dimensions when the elastic member such as the elastic member 33 is extended and the side panel and the diaper are expanded in a flat state without any influence of the elastic member. Measure in the expanded state until.

  Next, the constituent material of the diaper 1 will be described. As each constituent material, various materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. For example, as the tape substrate 42 of the first and second panel sheets 31 and 32 and the fastening tape 4 constituting the side panel 3, a nonwoven fabric, a woven fabric, a film, or a laminated sheet thereof can be used.

  As the topsheet 21a, for example, a hydrophilic and liquid-permeable nonwoven fabric or a three-dimensional aperture film can be used. As the outer layer composite sheet constituting the non-skin side sheet 22, the leak-proof sheet 22a is a liquid-impermeable or liquid-impermeable resin film (including water repellency), and the outer-layer nonwoven fabric 22b is a nonwoven fabric produced by various manufacturing methods (for example, , Air-through nonwoven fabric, spunbond nonwoven fabric, spunlace nonwoven fabric, needle punched nonwoven fabric, and the like. The outer layer nonwoven fabric 22b may have a multilayer structure. The non-skin side sheet 22 may not have the outer layer non-woven fabric 22b, and may be composed of only a resin film that is liquid-impermeable or liquid-impermeable (including water repellency). As the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core 23a in which water-absorbing polymer particles are held therein is used as a core made of water-permeable thin paper or non-woven fabric. What was covered with the lap sheet | seat 23b etc. can be used. As the three-dimensional guard forming sheet 21b for forming the three-dimensional guard, a film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

  As the elastic member 33, the elastic member 25 constituting the three-dimensional guard, and the leg elastic member 26, natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene acrylate-ethylethylene, etc. A thread-like or string-like elastic member made of an α-olefin copolymer or the like can be used. It is preferable from the viewpoints of manufacturing cost, simplification of the manufacturing process, and the like that the plurality of elastic members 33 arranged on one side panel are of the same type and arranged at the same elongation rate.

  Preferred materials for the adhesive for bonding the members including the adhesive for fixing the elastic member 33 are amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate ester copolymer Copolymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / Examples thereof include thermoplastic polymers such as propylene-styrene block copolymer (SEPS), and mixtures thereof. The adhesive is preferably a hot melt type.

  The disposable diaper 1 and the side panel 3 of the present embodiment are not particularly limited in the manufacturing method, and can be manufactured by any method. Hereinafter, the preferable example of the manufacturing method of the side panel 3 in the disposable diaper 1 of this embodiment is demonstrated with reference to FIG.

  FIG. 6 shows a stretchable sheet manufacturing apparatus 7 used as the side panel 3. The apparatus 7 shown in the figure is an integral unit that integrates a pair of elastic member conveying longitudinal structures 71 and 71, an elastic member winding means 72, an elastic member 33 and a pair of belt-like sheets 31 ′ and 32 ′. Providing means 73. The belt-like sheets 31 ′ and 32 ′ are original sheets of the panel sheets 31 and 32, respectively. The pair of longitudinal structures 71, 71 for conveying the elastic member are spaced apart from each other at a predetermined interval and arranged in parallel. The elastic member winding means 72 winds a thread-like elastic member 33 around a pair of elastic member transporting longitudinal structures 71, 71 so that the direction of the elastic member 33 is the longitudinal direction of the elastic member transporting longitudinal structure 71 (see FIG. The direction intersects the middle R direction. The integration means 73 is wound around the pair of elastic member transporting longitudinal structures 71, 71 by the elastic member winding means 72, and the elastic member 33 transported by the pair of elastic member transporting longitudinal structures 71, 71. , And are integrated by being sandwiched between a pair of belt-like sheets 31 ′ and 32 ′. As shown in FIG. 6, the elastic member transporting longitudinal structure 71 has a forward running portion that moves in the R direction and a backward feeding portion that moves in the opposite direction to the R direction, and only the forward running portion is a thread shape. An endless belt that engages with the elastic member 33 and conveys the elastic member 33 in the R direction is preferably used. The endless belt is stretched over a pulley or gear, and is driven by rotating the pulley or gear. Although only one such endless belt can be used as each elastic member transporting longitudinal structure 71, as shown in FIG. It is preferable to use a belt having upper and lower two stages. By providing a speed difference between the upper and lower belts, the elastic member 33 is oriented in the direction of the thread-like elastic member 33 that was zigzag in plan view when wound around the pair of elastic member transporting longitudinal structures 71, 71. It can be fixed between a pair of belt-like sheets 31 ′ and 32 ′ after being corrected to a state in which a large number of them are oriented in parallel with a gap in the R direction. As the elastic member transporting longitudinal structure 71, a round bar-like body having grooves and ridges spirally provided on the peripheral surface thereof and driven to rotate around the central axis can also be used.

  In this manufacturing method, as shown in FIG. 6, adhesives 63 ′ and 64 ′ for forming interlayer adhesive layers 31 a and 31 b are formed on a belt-like sheet 31 ′ that is a raw fabric of the first panel sheet 31. Each of the adhesive coating machines 75 is continuously coated in a strip shape. Sites corresponding to the main body side interlayer adhesive layer 31a and the tip side interlayer adhesive layer 31b are formed by the adhesives 63 ′ and 64 ′. The application sites are one side and the other side of the belt-like sheet 31 ′ along the conveyance direction R of the belt-like sheet 31 ′. Next, both side portions of the belt-like sheet 31 ′ are folded back to the surface facing the belt-like sheet 32 ′ by a sailor guide (not shown) so that both the adhesives 63 ′ and 64 ′ are inside. By this folding, portions corresponding to the main body side laminated structure portion 31A and the tip side laminated structure portion 31B are formed. When these laminated structure portions are formed, the belt-like sheet 31 ′ is folded back so that a part of the adhesives 63 ′ and 64 ′ is exposed and exposed portions 63 ″ and 64 ″ are formed. Exposed portions 63 "and 64" where a part of these adhesives 63 'and 64' are exposed form extended adhesive layers 31a 'and 31b'.

  Next, the adhesive 34 for forming the main body side adhesive layer 35, the front end side adhesive layer 36 and the intermediate adhesive layer 37 is formed into a strip shape by the adhesive coating machine 76, respectively, and the original fabric of the second panel sheet 32. Is continuously applied to the belt-like sheet 32 ′. The application position of the adhesive 34 on the belt-like sheet 32 'is appropriately determined according to the width of the belt-like sheet 31' after folding. Subsequently, the belt-like sheets 31 ′ and 32 ′ are joined together so that the elastic member 33 in an extended state is sandwiched therebetween, and they are integrated by pressing them from above and below with a pair of nip rolls 74 as the integration means 73. Let As a result, the elastic member 33 is formed between the pair of belt-like sheets 31 ′ and 32 ′ on one side and the other side of the belt-like sheets 31 ′ and 32 ′ along the conveying direction R of the belt-like sheets 31 ′ and 32 ′. Fixed to both sides. Specifically, the elastic member 33 is formed by the adhesive forming the main body side adhesive layer 35 applied to the belt-like sheet 32 ′ and the adhesive exposed at the exposed portion 63 ″ of the belt-like sheet 31 ′. One end thereof is fixed to both of the belt-like sheets 31 ′ and 32 ′, and further, an adhesive forming the tip side adhesive layer 36 coated on the belt-like sheet 32 ′ and an exposed portion 64 of the belt-like sheet 31 ′. The other end of the elastic member 33 is fixed to both the belt-like sheets 31 ′ and 32 ′ by the adhesive exposed in “”.

  Thereafter, the elastic member 33 extending laterally is cut by a cutting means 77 such as a cutter provided with a cutting blade to obtain a continuous body 3 ′ of an elastic sheet. The obtained stretchable sheet continuous body 3 ′ is sequentially cut to the length of each side panel 3 by an arbitrary cutting means (not shown). Thus, the side panel 3 of this embodiment can be continuously produced efficiently.

  When manufacturing the disposable diaper of this embodiment, it is conventionally well-known except using the continuous body 3 'of the structure which the said side panel 3 or this side panel 3 continued in the longitudinal direction (Y direction). According to the method, a disposable diaper can be manufactured.

For example, the preferable manufacturing method which manufactures the disposable diaper 1 of 1st Embodiment using the continuous body 3 'of the elastic sheet of the structure with which the side panel 3 was continued comprises the following process (I)-(VI). .
(I) The process of cutting the continuous body of the fastening tape 4 with which the adhesive agent for forming the connection adhesive layer 65 was applied, and attaching to the continuous body 3 'of an elastic sheet intermittently.
In this step, the cut fastening tape 4 is fixed to the stretchable sheet continuous body 3 ′ via the adhesive. It is preferable that the continuous body of the fastening tape 41 is fixed along the longitudinal direction of the continuous body of the fastening tape 4 before cutting.
(II) A step of folding the fastening tape 4 and temporarily fixing it to the continuous body 3 ′ of the stretchable sheet via the fastening part 41.
In this step, a portion of the fastening tape 4 extending from the side edge of the stretchable sheet continuous body 3 ′ is folded back and temporarily fixed via the fastening portion 41.
(III) The process of apply | coating the adhesive agent for forming the outer surface side adhesive bond layer 62a continuously to the continuous body 3 'of an elastic sheet.
(IV) A step of cutting the continuum 3 ′ of the elastic sheet and attaching it to the continuum of the skin side sheet 21 or the non-skin side sheet 22.
The continuous body of the skin-side sheet 21 is obtained by integrating the continuous body of the three-dimensional guard forming sheet 21b and the continuous body of the top sheet 21a. The continuous body of the three-dimensional guard forming sheet 21 b and the continuous body of the top sheet 21 a are integrated via the adhesive layers 68 and 69. In this step, the side panel 3 with the fastening tape obtained by cutting the stretchable sheet continuous body 3 ′ is attached to the continuous body of the skin side sheet 21 or the non-skin side sheet 22. When the side panel 3 is attached to the continuous body of the non-skin side sheet 22, it is attached via the outer surface side adhesive layer 62a, and when the side panel 3 is attached to the continuous body of the skin side sheet Is attached via the inner surface side adhesive layer 66a.

(V) The process of integrating the continuous body of the skin side sheet | seat 21 and the continuous body of the non-skin side sheet | seat 22 by inserting the absorber 23 between both.
In the step (IV), when attaching the side panel 3 with the fastening tape to the continuous body of the non-skin side sheet 22, the absorbent body 23 is disposed on one side of the continuous body of the non-skin side sheet 22 and absorbed. The continuous body of the skin-side sheet 21 is overlapped so as to cover the opposite surface of the body 23. And the continuous body of the non-skin side sheet | seat 22 and the continuous body of the skin side sheet | seat 21 are joined by arbitrary methods, such as an adhesive agent, a heat seal, and an ultrasonic seal | sticker. On the other hand, in the step (IV), when the side panel 3 with the fastening tape is attached to the continuous body of the skin side sheet 21, the absorbent body 23 is disposed on one side of the continuous body, and the non-skin side sheet The 22 continuums are stacked so as to cover the opposite surface of the absorber. And the continuous body of the non-skin side sheet | seat 22 and the continuous body of the skin side sheet | seat 21 are joined by arbitrary methods, such as an adhesive agent, a heat seal, and an ultrasonic seal | sticker.
(VI) A step of cutting the obtained diaper continuous body into individual disposable diapers.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the embodiment, both the main body side interlayer adhesive layer 31a and the front end side interlayer adhesive layer 31b have the extended adhesive layers 31a ′ and 31b ′. The agent layer may be formed only on one of the main body side interlayer adhesive layer 31a and the front end side interlayer adhesive layer 31b. In that case, in the method for manufacturing the stretchable sheet shown in FIG. 6, the part where the adhesive is exposed may be only one of the one side part and both side parts of the belt-like sheet 31 ′.

  Moreover, in the said embodiment, both the edge part of the 1st panel sheet | seat 31 and the edge part of an absorptive main body side and the edge part by the side of a front-end | tip part are turned inward, and 31 A of main body side laminated structure parts and front-end | tip side laminated structure parts 31B was formed, but instead of this, only one of the main body side laminated structure portion 31A and the tip side laminated structure portion 31B may be formed as the laminated structure portion. In that case, in the method for manufacturing the stretchable sheet shown in FIG. 6, the belt-like sheet 31 ′ may be folded only in one of the one side portion and the multi-side portion.

  Moreover, in the said embodiment, although the laminated structure part was formed among the two panel sheets 31 and 32, or the 1st panel sheet | seat which formed the extended adhesive bond layer was distribute | arranged to the outer surface side, it replaced with this A panel sheet (panel sheet 32) located on the inner surface side may be used as the first panel sheet, and a laminated structure portion may be formed thereon, or an extended adhesive layer may be formed. Furthermore, you may form a laminated structure part in both the 1st and 2nd panel sheets 31 and 32, and may form an extended adhesive bond layer. When forming the laminated structure portion and the extended adhesive layer on both the first and second panel sheets 31, 32, the extended adhesive layer (the main body side extended adhesive layer 31a 'or the front end side extended) The adhesive layer 31b ′) also serves as the main body side interlayer adhesive layer 31a or the tip side interlayer adhesive layer 31b.

  Moreover, in the said embodiment, although the elastic member 26 for leg gather formation was clamped by the two-layer structure part of the sheet | seat 21b for solid guard formation, it replaces with this and the sheet | seat 21b for solid guard formation and the non-skin side It may be sandwiched between the sheet 22.

This invention discloses the manufacturing method of the following disposable diapers and an elastic sheet further regarding embodiment mentioned above.
<1> An absorbent body including an absorbent body, a skin-side sheet disposed on the inner surface side of the absorbent body, and a non-skin-side sheet disposed on the outer surface side of the absorbent body, and one or both of the absorbent main body A disposable diaper with stretchable side panels attached to the sides,
The side panel is provided with a fastening tape at the tip, and has first and second two panel sheets and an elastic member fixed in an extended state between the two panel sheets. ,
The elastic member is fixed to both the first and second panel sheets at or near the end on the absorbent main body side and at or near the end on the tip side of the side panel,
(A) Of the first and second panel sheets, at least the first panel sheet has a main body side laminated structure portion in which an end portion on the absorbent main body side is folded inside the side panel. ,
In the main body side laminated structure part, an adhesive is applied between the first panel sheets facing each other by folding, and a main body side interlayer adhesive layer is formed,
The main body side interlayer adhesive layer has a main body side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the main body side laminated structure portion,
The elastic member includes a main body side extending adhesive layer and a main body side adhesive layer positioned on the second panel sheet side and fixing an end of the absorbent main body side or the vicinity thereof. It is fixed to both the first and second panel sheets, or (b) Of the first and second panel sheets, at least the first panel sheet has an end on the tip side of the side panel, It has a tip side laminated structure part that is folded inside the side panel,
In the tip side laminated structure portion, an adhesive is applied between the first panel sheets facing each other by folding, and a tip side interlayer adhesive layer is formed,
The tip side interlayer adhesive layer has a tip side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the tip side laminated structure portion,
The elastic member includes the front end side extended adhesive layer and a front end side adhesive layer that is located on the second panel sheet side and that fixes the end portion on the front end side of the side panel or the vicinity thereof. The disposable diaper currently fixed to both the 1st and 2nd panel sheet | seat.

<2> The disposable diaper according to <1>, wherein the main body side extending adhesive layer and the main body side adhesive layer have the same position of the end portion on the center side in the width direction of the side panel.
<3> The disposable diaper according to <1>, wherein the distal-side extended adhesive layer and the distal-end-side adhesive layer have the same end position on the center side in the width direction of the side panel.
<4> The first panel sheet includes a main body-side laminated structure portion in which an end portion on the absorbent main body side is folded inward, and a tip-end side laminated structure in which an end portion on the tip portion side of the side panel is folded inward. Has a part,
The interlayer adhesive layer has a main body side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the main body side laminated structure portion, and the interlayer adhesive layer However, it has a tip side extended adhesive layer that extends beyond the tip side laminated structure portion and toward the center in the width direction of the side panel,
The elastic member is fixed to both the first and second panel sheets by the main body side extending adhesive layer and the main body side adhesive layer located on the second panel sheet side, and <1> to <3> fixed to both the first and second panel sheets by the front end side extending adhesive layer and the front end side adhesive layer positioned on the second panel sheet side. The disposable diaper as described in any one.
<5> The disposable diaper according to any one of <1> to <4>, wherein the first panel sheet is disposed on an outer surface side among the first and second panel sheets.

<6> The skin-side sheet 21 includes a liquid-permeable surface sheet and a pair of three-dimensional guard forming sheets bonded to both sides thereof, and the three-dimensional guard forming sheet includes an adhesive layer on the surface sheet. The disposable diaper according to any one of the above <1> to <5>, which is joined via
<7> The three-dimensional guard forming sheet has an elastic member for forming a three-dimensional guard in the vicinity of the inner edge in the width direction (X direction) of the absorbent main body, and the diaper 1 is worn. The disposable diaper according to the above <6>, wherein a portion having a predetermined width in the crotch part stands up and separates from the top sheet by a contracting force of the elastic member to form a three-dimensional guard.
<8> A plurality of intermediate adhesive layers are provided in an intermediate region that is a region between the main body side adhesive layer and the tip side adhesive layer in the extending direction of the side panel, <1 The disposable diaper according to any one of> to <7>.

<9> The disposable diaper according to <8>, wherein the main body side adhesive layer, the tip end side adhesive layer, and the intermediate adhesive layer are located at least on the second panel sheet side.
<10> In the side panel, the two panel sheets are directly joined to each other through an adhesive constituting each adhesive layer in a portion where the elastic member is not interposed. The disposable diaper according to any one of <9>.
<11> The main body side adhesive layer does not reach the edge on the side of the absorbent main body in the side panel, and the side panel has a non-space between the two panel sheets at the base end portion. The disposable diaper according to any one of <1> to <10>, wherein the disposable diaper has a main body-side non-adhesion region in a joined state.
<12> The tip side adhesive layer does not reach the fastening tape side edge of the side panel, and the side panel is in a non-bonded state between the two panel sheets at the tip part. The disposable diaper according to any one of <1> to <11>, which has a tip-side non-adhesive region.
<13> The main body side adhesive layer, the distal end side adhesive layer, and the intermediate adhesive layer are all crossed with a plurality of elastic members extending in the width direction (X direction) of the disposable diaper, and the diaper longitudinal direction The disposable diaper according to any one of <8> to <12>, which extends in the (Y direction).

<14> The main body side adhesive layer, the tip side adhesive layer, and the intermediate adhesive layer all intersect with all elastic members extending in the width direction (X direction) of the disposable diaper in the longitudinal direction of the diaper ( The disposable diaper according to any one of <8> to <13>, which extends in the Y direction) and extends over the entire length between the upper and lower edges of the side panel.
<15> The <1> to <14>, in which the side panel has a formation position of the main body side extending adhesive layer and a formation position of the main body side adhesive layer overlapping in the thickness direction of the diaper. The disposable diaper according to any one of the above.
<16> The <1> to <15>, in which the side panel has a front end side extending adhesive layer forming position and a front end side adhesive layer forming position overlapping in a diaper thickness direction. The disposable diaper according to any one of the above.
<17> The width of the main body side extending adhesive layer and the width of the leading end side extending adhesive layer in the width direction (X direction) of the disposable diaper of the side panel are each independently 3 mm or more, or 5 mm. It is above, is 15 mm or less, is 10 mm or less, is 3 mm or more and 15 mm or less, or is 5 mm or more and 10 mm or less, More preferably, it is any one of said <1>-<16> Disposable diapers.
<18> The side panel is an upper side where the (second) panel sheet and the three-dimensional guard forming sheet are joined to the inner surface side on the absorbent main body side in the width direction (X direction) of the disposable diaper. The disposable diaper according to any one of <6> to <17>, wherein the disposable diaper has a joint.

<19> Of the two surfaces of the (second) panel sheet arranged on the inner surface side, the surface facing the inner surface side is joined to the three-dimensional guard forming sheet via the upper joint portion, <18> Disposable diapers described in 1.
<20> The disposable diaper according to <18> or <19>, wherein a formation position of the upper joint portion of the side panel and a formation position of the main body side adhesive layer are overlapped in a thickness direction of the diaper. .
<21> The disposable body according to any one of <1> to <20>, wherein the main body side adhesive layer is formed across the main body side extending adhesive layer and the main body side laminated structure portion. Diapers.
<22> The disposable diaper according to any one of <1> to <21>, wherein the tip side adhesive layer is formed across the tip side extended adhesive layer and the tip side laminated structure portion. .
<23> In the side panel, a panel sheet arranged on the outer surface side of the two panel sheets constituting the side panel and the non-skin side sheet are joined to the absorbent main body side. The disposable diaper according to any one of <1> to <3>, wherein the disposable diaper has a lower bonding portion, and the lower bonding portion and the main body side adhesive layer overlap in a thickness direction of the diaper.

<24> The disposable diaper according to any one of <1> to <23>, wherein the first panel sheet is arranged on an inner surface side among the first and second panel sheets.
<25> The disposable diaper according to any one of <1> to <23>, wherein a laminated structure portion and an extended adhesive layer are formed on both the first and second panel sheets.
<26> The absorptive main body has an abdominal side portion positioned on the wearer's ventral side, a back side portion positioned on the wearer's back side, and a crotch portion positioned on the crotch portion when worn, and the side panel is The disposable according to any one of <1> to <25>, attached to both side portions of the absorbent main body in the back side portion so as to protrude outward from both side edge portions of the absorbent main body. Diapers.
<27> The non-skin-side sheet includes a liquid-impervious or liquid-impervious (including water repellency) leak-proof sheet and an outer layer bonded to the outer surface side of the leak-proof sheet via an outer adhesive layer. The disposable diaper according to any one of <1> to <26>, comprising a composite sheet having a nonwoven fabric.
<28> The elastic members are thread-like, and each of the elastic members is arranged along the width direction (X direction) of the diaper, and is arranged with substantially equal intervals in the longitudinal direction (Y direction) of the diaper. The disposable diaper according to any one of <1> to <27>.
<29> There are a plurality of elastic members disposed on the side panel, and the number of elastic members is 4 or more, 6 or more, 30 or less, 20 or less, and 4 or more. The disposable diaper according to any one of <1> to <28>, wherein the number is 30 or less, or 6 or more and 20 or less.
<30> The disposable diaper according to any one of <1> to < 29 >, wherein a nonwoven fabric, a woven fabric, a film, or a laminate sheet thereof is used as a panel sheet constituting the side panel.

<31> A step of conveying a pair of belt-like sheets, and a thread-like elastic body disposed between the belt-like sheets in a direction intersecting the conveyance direction of the belt-like sheets, In each of the one side part and the other side part, a method for producing an elastic sheet comprising a step of fixing the thread-like elastic body to both the pair of belt-like sheets in an extended state,
For one of the pair of belt-like sheets, an adhesive is applied along at least one of the one side and the other side of the belt-like sheet along the transport direction of the belt-like sheet along the transport direction. Work,
The side part coated with the adhesive is folded so that the adhesive is on the inside to form a laminated structure part,
A step of fixing the thread-like elastic body in an extended state between the other belt-like sheet and the one belt-like sheet having the laminated structure portion in a direction crossing the conveying direction of these belt-like sheets;
Production of a stretchable sheet in which one of the belt-like sheets is folded so that a part of the adhesive is exposed at the time of forming the laminated structure portion, and the thread-like elastic body is fixed by the adhesive exposed after the folding. Method.

<32> The method for producing a stretchable sheet according to <31>, further including a step of applying an adhesive to the other of the pair of strip-shaped sheets.
<33> The adhesive for forming the interlayer adhesive layer is continuously applied to the belt-like sheet which is the original fabric of the first panel sheet in a belt-like manner by the adhesive coating machine, and the main body side laminated structure is formed by the folding. The method for producing a stretchable sheet according to <31>, wherein a portion corresponding to the portion and the tip side laminated structure portion is formed.
<34> Adhesive for forming the main body side adhesive layer, the tip side adhesive layer, and the intermediate adhesive layer is applied to the belt-like sheet that is the original fabric of the second panel sheet 32 by an adhesive coating machine. The method for producing a stretchable sheet according to <32>, wherein each is continuously coated in a band shape.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, the scope of the present invention is not restrict | limited at all by description of a following example.

[Example 1]
The disposable diaper of Example 1 which has the structure similar to the disposable diaper of the form shown in FIG. 1 thru | or FIG. 4 was manufactured.
As the panel sheet | seats 31 and 32 which comprise the side panel 3, the nonwoven fabric of basic weight 13g / m < ² > was used. Ten elastic members 33 made of rubber thread are arranged in the side panel 3. The three-dimensional guard forming sheet 21b is formed by folding a laminated nonwoven fabric having a basis weight of 10 g / m ² having a laminated structure of a spunbond nonwoven fabric and a meltblown nonwoven fabric to form a two-layer structure portion (total basis weight of the two-layer structure portion) 20 g / m ² ) was used. As the non-skin side sheet 22, using a composite material formed by joining outer surface basis weight 13 g / m ² of the outer-layer nonwoven fabric of the resin film having a basis weight of 18 g / m ² (the total basis weight 31g / m ^2). As the adhesive, a blend of SIS and SBS was used for bonding the panel sheets 31 and 32, and a hot melt adhesive of SBS was used for the other joining. The basis weight of the adhesive used for forming the main body side adhesive layer 35 and the front end side adhesive layer 36 is 40 g / m ² , and the main body side interlayer adhesive layer 31a and the main body side extending adhesive layer 31a ′, In addition, the basis weight of the adhesive used for forming the tip side interlayer adhesive layer 31b and the tip side extended adhesive layer 31b ′ was 10 g / m ² . The basis weight of the adhesive used for the plurality of intermediate adhesive layers 37 was 40 g / m ² .
The widths in the X direction of the main body side interlayer adhesive layer 31a and the tip side interlayer adhesive layer 31b were both 25 mm. The width in the X direction of the main body side extending adhesive layer 31a ′ and the tip side extending adhesive layer 31b ′ was 5 mm. The widths in the X direction of the main body side adhesive layer 35 and the front end side adhesive layer 36 were both 12 mm. The intermediate adhesive layer 37 had a width in the X direction of 0.5 mm, and 10 pieces were formed. Moreover, the length of the X direction of the site | part which the upper side junction part 66 of the side panel 3 and the main body side adhesive bond layer 35 overlap in the thickness direction of a diaper is 4 mm, and the X direction of the upper side join part 66 (inner surface side adhesive bond layer 66a). The width in the X direction of the portion where the lower joint portion 62 and the main body side adhesive layer 35 overlap in the thickness direction of the diaper is 4 mm, the X direction of the lower joint portion 62 or the outer surface side adhesive layer 62a The width was 30 mm.
The length in the X direction at the portion where the upper joint portion 66, the main body side adhesive layer 35, and the lower joint portion 62 overlap in the thickness direction was 4 mm.

[Examples 2 and 3]
In Example 1, the basis weight of the adhesive used for forming the main body side adhesive layer 35 and the front end side adhesive layer 36 was 50 g / m ² , and the main body side extended adhesive layer 31a ′ and the front end side extended adhesive were used. The basis weight of the adhesive used for forming the agent layer 31b ′ was 5 g / m ² . Except this, it carried out similarly to Example 1, and manufactured the diaper of Example 2. In Example 1, the basis weight of the adhesive used for forming the main body side adhesive layer 35 and the front end side adhesive layer 36 is 50 g / m ² , and the main body side extending adhesive layer 31a ′ and the front end side extending length are set. The basis weight of the adhesive used for forming the outgoing adhesive layer 31b ′ was 10 g / m ² . Except this, it carried out similarly to Example 1, and manufactured the diaper of Example 3.

[Comparative Examples 1 and 2]
In Comparative Example 1, a diaper was manufactured without forming the main body side extending adhesive layer 31a ′ and the tip side extending adhesive layer 31b ′ in Example 1. In Comparative Example 2, a diaper was manufactured without forming the main body side extending adhesive layer 31a ′ and the tip side extending adhesive layer 31b ′ in Example 2.

[Evaluation]
About the diaper obtained by the Example and the comparative example, the joint strength of the elastic member 33 distribute | arranged to the side panel 3 was measured. The tip side of the side panel 3 was cut out from the diaper in a state including five intermediate adhesive layers 37. The cut side panel 3 was cut between the elastic members 33 to produce ten measurement pieces. Next, with respect to the measurement piece including one elastic member 33, the front end 3a side of the side panel 3 is directed downward, and the side cut from the diaper is directed upward, and the first panel sheet 31 and the second panel are placed under the state. The end of the elastic member 33 was exposed away from the sheet 32. The exposed end of the elastic member 33 was held with a chuck. On the other hand, the part where the elastic member 33 does not exist on the tip side with respect to the formation position of the tip side adhesive layer 36 and the tip side extended adhesive layer 31b ′ in the side panel 3 facing downward was gripped by a chuck. And the chuck | zipper which hold | gripped the edge part of the elastic member 33 was pulled upwards at a speed | rate of 3000 mm / min, and this elastic member 33 was extracted. The load during pulling out of the elastic member 33 was measured to obtain the maximum load. This measurement was performed for each of the elastic members 33 of the ten measurement pieces, and the average value of the maximum loads determined by the measurement was calculated. This average value was defined as the bonding strength of the elastic member. The results are shown in Table 1 below.

  As is apparent from the results shown in Table 1, in the diapers obtained in each example, it can be seen that the bonding strength of the elastic member 33 arranged on the side panel 3 is higher than that of the comparative example.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Absorbent main body 21 Skin side sheet 21a Surface sheet 21b Three-dimensional guard formation sheet 22 Non-skin side sheet 22a Leak-proof sheet 22b Outer layer nonwoven fabric 23 Absorber 23a Absorbent core 23b Core wrap sheet 3, 3A-3D Side panel 3a Front end portion 3b Base end portion 31 First panel sheet 31A Main body side laminated structure portion 31B Front end side laminated structure portion 31a Main body side interlayer adhesive layer 31b Front end side interlayer adhesive layer 31a 'Main body side extending adhesive layer 31b' Front end Side extension adhesive layer 32 Second panel sheet 33 Elastic member 35 Main body side adhesive layer 36 Tip side adhesive layer 37 Intermediate adhesive layer 38 Non-adhesive region 4 Fastening tape 41 Fastening portion 42 Tape base material 61 Outer layer adhesive Layer 62 Lower joint 62a Outer adhesive layer 65 Adhesive layer for connection 66 Upper joint 6 a inner surface-side adhesive layer

Claims (6)

An absorbent body including an absorbent body, a skin-side sheet disposed on the inner surface side of the absorbent body, and a non-skin-side sheet disposed on the outer surface side of the absorbent body, and one or both sides of the absorbent body A disposable diaper with a stretchable side panel attached,
The side panel is provided with a fastening tape at the tip, and has first and second two panel sheets and an elastic member fixed in an extended state between the two panel sheets. ,
The elastic member is fixed to both the first and second panel sheets at or near the end on the absorbent main body side and at or near the end on the tip side of the side panel,
(A) Of the first and second panel sheets, at least the first panel sheet has a main body side laminated structure portion in which an end portion on the absorbent main body side is folded inside the side panel. ,
In the main body side laminated structure part, an adhesive is applied between the first panel sheets facing each other by folding, and a main body side interlayer adhesive layer is formed,
The main body side interlayer adhesive layer has a main body side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the main body side laminated structure portion,
The elastic member includes a main body side extending adhesive layer and a main body side adhesive layer positioned on the second panel sheet side and fixing an end of the absorbent main body side or the vicinity thereof. It is fixed to both the first and second panel sheets, or (b) Of the first and second panel sheets, at least the first panel sheet has an end on the tip side of the side panel, It has a tip side laminated structure part that is folded inside the side panel,
In the tip side laminated structure portion, an adhesive is applied between the first panel sheets facing each other by folding, and a tip side interlayer adhesive layer is formed,
The tip side interlayer adhesive layer has a tip side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the tip side laminated structure portion,
The elastic member includes the front end side extended adhesive layer and a front end side adhesive layer that is located on the second panel sheet side and that fixes the end portion on the front end side of the side panel or the vicinity thereof. The disposable diaper currently fixed to both the 1st and 2nd panel sheet | seat. Said body side extending adhesive layer and the body side adhesive layer disposable diaper according to claim 1, the position of the end portion in the width direction center side of the side panels are identical. The free end portion extending adhesive layer and the distal-side adhesive layer disposable diaper according to claim 1, the position of the end portion in the width direction center side of the side panels are identical. The first panel sheet has a main body side laminated structure portion in which an end portion on the absorbent main body side is folded inward, and a front end side laminated structure portion in which an end portion on the tip end side of the side panel is folded inward. And
The interlayer adhesive layer has a main body side extending adhesive layer extending toward the center side in the width direction of the side panel beyond the main body side laminated structure portion, and the interlayer adhesive layer However, it has a tip side extended adhesive layer that extends beyond the tip side laminated structure portion and toward the center in the width direction of the side panel,
The elastic member is fixed to both the first and second panel sheets by the main body side extending adhesive layer and the main body side adhesive layer located on the second panel sheet side, and The front end side extending adhesive layer and the front end side adhesive layer positioned on the second panel sheet side are fixed to both the first and second panel sheets. The disposable diaper described in the item.   The disposable diaper as described in any one of Claims 1 thru | or 4 by which the 1st panel sheet is distribute | arranged to the outer surface side among the 1st and 2nd panel sheets. A step of conveying a pair of belt-like sheets, and a thread-like elastic body disposed between the belt-like sheets in a direction crossing the belt-like sheet conveyance direction, and one side portion of the belt-like sheet along the belt-like sheet conveyance direction And in each other side part, it is a manufacturing method of an elastic sheet provided with the process of fixing a thread-like elastic body to both of a pair of these beltlike sheets in the state of extension,
For one of the pair of belt-like sheets, an adhesive is applied along at least one of the one side and the other side of the belt-like sheet along the transport direction of the belt-like sheet along the transport direction. Work,
The side part coated with the adhesive is folded so that the adhesive is on the inside to form a laminated structure part,
A step of fixing the thread-like elastic body in an extended state between the other belt-like sheet and the one belt-like sheet having the laminated structure portion in a direction intersecting the conveying direction of these belt-like sheets;
Production of a stretchable sheet in which one of the belt-like sheets is folded so that a part of the adhesive is exposed at the time of forming the laminated structure portion, and the thread-like elastic body is fixed by the adhesive exposed after the folding. A method ,
About the other band-shaped sheet, the part where the adhesive applied to one of the band-shaped sheets is exposed among one side and the other side of the band-shaped sheet along the conveyance direction of the band-shaped sheet; Production of an elastic sheet further comprising a step of applying an adhesive to a portion overlapping the thickness direction of the elastic sheet, and fixing the thread-like elastic body from the other belt-like sheet side by the adhesive Way .

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