JP2014054352A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper hardly causing tearing and breakage in a joining part of a side panel and an absorbent body and its vicinity or the side panel.SOLUTION: A diaper 1A includes: an absorptive body 2 including an absorber 23, a top sheet 21 and an outer layer composite sheet 22; and an elastic side panel 3 fitted to the side of the absorbent body 2. The side panel 3 is provided with a fastening tape 4 at the tip part 3a. The absorbent body 2 has a sheet 24 for forming a three-dimensional guard on both side parts. The three-dimensional guard forming sheet 24 has a two-layer structure part 24a and a three-layer structure part 24b formed by turning back both side parts of one sheet so that they are superposed one on the other and stacked, and the interlayer parts are bonded. The three-dimensional guard forming sheet 24 is fixed to a sheet 31 constituting the side panel 3 at both side parts of the absorbent body 2.

Description

  The present invention relates to a deployable 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. It is known (see Patent Document 1).
This type of disposable diaper can be manufactured by adding the side panel material in a separate process from the absorbent main body and adding it to the absorbent main body. Waste generated from the material can be suppressed, which is excellent in terms of environment and cost.

However, on the other hand, when attaching the diaper by pulling the fastening tape etc. provided at the tip of the side panel, or the vicinity of the junction between the side panel and the absorbent main body, or the junction between the side panel and the fastening tape, or the The tears and tears are likely to occur in the vicinity.
In order to eliminate such inconvenience, in Patent Document 1 described above, a side portion of the side panel that overlaps with the absorbent main body or the fastening tape is folded to form a reinforcing nonwoven layer, and the reinforcing nonwoven layer is formed into the absorbent main body or the fastening. Proposed to join with tape.

JP 2008-295836 A

  However, even if the reinforced nonwoven fabric layer is formed as in the diaper described in Patent Document 1, when the diaper is worn, the force concentrates on the boundary between the absorbent main body and the joint portion of the side panel, and the side panel Tear and tear easily occur.

  Accordingly, an object of the present invention is to dispose of a disposable diaper having a stretchable side panel at a portion disposed on the back side of the absorbent main body, a joint between the side panel and the absorbent main body, its vicinity, or a side panel. It is to provide a disposable diaper which is hard to break or torn.

  The present invention includes an absorbent body including an absorbent body, a surface sheet disposed on the inner surface side of the absorbent body, and an outer layer composite sheet disposed on the outer surface side of the absorbent body, and one or the other in the longitudinal direction of the absorbent body. A disposable diaper having stretchable side panels attached to both sides, wherein the side panel is provided with a fastening tape at the tip, and the absorbent main body is the longitudinal length of the absorbent main body. The three-dimensional guard forming sheet is disposed on both sides in the direction, and the three-dimensional guard forming sheet is formed by folding two side portions of one sheet so as to overlap each other and 3 The two-layer structure portion and the three-layer structure portion are bonded to each other, and are fixed to the sheet constituting the side panel on both sides in the longitudinal direction of the absorbent main body. The That is intended to provide a disposable diaper.

  ADVANTAGE OF THE INVENTION According to this invention, when mounting | wearing a diaper, it is hard to produce a tear and a tear in the junction part of a side panel and an absorptive main body, its vicinity, or a side panel, and the disposable diaper which the usability | use_condition improved is provided.

FIG. 1: is the expansion | deployment top view which looked at the disposable diaper which is 1st 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 the line II of FIG. FIG. 5 is an enlarged plan view (corresponding to FIG. 4) showing the side panel and the vicinity thereof in the disposable diaper according to the second embodiment of the present invention. 6 is a cross-sectional view taken along the line II-II in FIG. 5 (corresponding to FIG. 5). FIG. 7 is an enlarged plan view (corresponding to FIG. 4) showing the side panel and the vicinity thereof in the disposable diaper of the third embodiment of the present invention. 8 is a cross-sectional view taken along the line III-III in FIG. 7 (corresponding to FIG. 5). FIG. 9 is an enlarged plan view (corresponding to FIG. 4) showing the side panel and the vicinity thereof in the disposable diaper according to the fourth embodiment of the present invention. 10 is a cross-sectional view taken along the line IV-IV in FIG. 9 (corresponding to FIG. 5). FIG. 11: is a perspective view which shows an example of the manufacturing method of the side panel in the disposable diaper of 1st-4th embodiment. FIG. 12 is an enlarged plan view (corresponding to FIG. 4) showing a side panel and its vicinity in a disposable diaper according to another embodiment of the present invention.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
As shown in FIG. 1, a disposable diaper 1A according to the first embodiment of the present invention (hereinafter also referred to as diaper 1A) includes an absorbent body 23, a surface sheet 21 disposed on the inner surface side of the absorbent body 23, and the absorbent body. 23 includes an absorbent main body 2 including an outer layer composite sheet 22 disposed on the outer surface side of 23, and stretchable side panels 3 and 3 attached to both sides in the longitudinal direction of the absorbent main body 2.

In the diaper 1A, the absorbent main body 2 has a vertically long shape as shown in FIG. 1, and is located on the abdomen side A located on the abdomen side of the wearer when worn, on the back side of the wearer. It has a back side part B and a crotch part C located at the crotch part. As shown in FIG. 1, the absorbent main body 2 has a rectangular shape in a state where the absorbent main body 2 is expanded in a planar shape. 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. In the disposable diaper 1 </ b> A, the side panels 3 and 3 are fixed to the absorbent main body 2 and a three-dimensional guard forming sheet 24 described later via an adhesive layer.
The longitudinal direction of 1 A of disposable diapers is the Y direction in a figure, and is the same direction as the longitudinal direction of an absorptive main body. The width direction of the disposable diaper 1 </ b> A 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. Further, the inner surface of the diaper or diaper component is a surface that is directed toward the wearer's skin when worn, and the outer surface of the diaper or diaper component is directed away from the wearer's skin when worn. It is the surface to be.

  As shown in FIGS. 1 and 4, the absorbent main body 2 includes a liquid-permeable surface sheet 21, an outer composite sheet 22, and a liquid-retaining absorbent 23 interposed between the two sheets 21 and 22. have. The outer composite sheet 22 includes a liquid impervious or liquid impervious (including water repellency) leakproof sheet 22a and an outer layer adhesive layer 61 on the outer surface side (Q side in FIG. 4) of the leakproof sheet 22a. And an outer layer nonwoven fabric 22b joined via each other. The outer layer nonwoven fabric 22b has the same shape in plan view as the absorbent main body 2, and the leak-proof sheet 22a has the same plan view shape as the outer layer nonwoven fabric 22b except that the width in the X direction is slightly smaller as shown in FIG. doing. Due to the presence of the outer layer nonwoven fabric 22b, the touch of the outer surface of the diaper is good.

  As shown in FIG. 1, the diaper 1 </ b> A 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, the laminated state of the three-dimensional guard forming sheet 24, and the joining mode between them and the absorbent main body 2 will be described mainly using the left side of FIG. It is the same except that it becomes symmetric.

  The side panel 3 is provided with a fastening tape 4 at the tip 3a. In the diaper 1A, as shown in FIGS. 3 and 4, the two sheets 31, 32 and between the two sheets 31, 32 are provided. It has the elastic member 33 fixed to. As shown in FIG. 3, the side panel 3 in the diaper 1 </ b> A has a rectangular shape in a state of being expanded in a planar shape. Moreover, as shown in FIG. 4, the side panel 3 is fixed between the two sheets 31 and 32 made of nonwoven fabric and the two sheets 31 and 32 in a state of extending in the diaper width direction (X direction). And a plurality of elastic members 33. The fastening tape 4 provided at the front end portion 3a of the side panel 3 is for fixing the side panel 3 to other parts. Each of the elastic members 33 is disposed along the width direction (X direction) of the diaper 1A. 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.

  The absorbent main body 2 has three-dimensional guard forming sheets 24, 24 arranged on both sides in the longitudinal direction of the absorbent main body 2. The three-dimensional guard forming sheet 24 is disposed on the side in the longitudinal direction of the absorbent main body 2 over the entire length of the absorbent main body 2. The three-dimensional guard forming sheet 24 has an elastic member 25 for forming a three-dimensional guard along the edge in the vicinity of the inner edge of the absorbent main body 2 in the width direction (X direction). Due to the contraction force of the elastic member 25, a portion having a predetermined width from the end edge of the crotch C is separated from the topsheet 21 to form a three-dimensional guard. Moreover, the elastic member 26 for leg gather formation is distribute | arranged to the part distribute | arranged around the leg of the longitudinal direction both sides of the absorptive main body 2.

  The three-dimensional guard forming sheet 24 has a two-layer structure portion 24a and a three-layer structure portion 24b, which are laminated so that both sides of one sheet are folded and overlapped with each other. The portions 24b are joined between the layers. As described above, the three-dimensional guard forming sheet 24 is formed by folding two sides of one sheet so as to overlap each other and joining the two layers by thermal fusion and the three layers by thermal fusion. And a three-layer structure portion 24b joined together. More specifically, as shown in FIGS. 3 and 4, the three-layer structure portion 24 b of the diaper 1 </ b> A has an outer end portion 24 </ b> O (longitudinal center line CL) on the side panel 3 side of one solid guard forming sheet 24. And the inner end 24I on the absorbent main body 2 side (longitudinal center line CL side) are folded back to the outer surface side (Q side in FIG. 4) of the three-dimensional guard forming sheet 24, respectively. Yes. The three-layer structure portion of the diaper 1A is formed by covering the folded outer end portion 24O with the folded inner end portion 24I. That is, the outer surface of the folded outer end portion 24O and the inner surface of the folded inner end portion 24I are joined by thermal fusion. Therefore, the folded solid guard forming sheet 24 is formed in an annular shape (endless shape).

In the diaper 1A, a plurality of layers of the folded three-dimensional guard forming sheet 24, that is, both layers of the two-layer structure portion 24a and the three-layer structure portion 24b are arranged in a scattered manner as shown in FIG. The three-dimensional guard forming sheet 24 which is joined by the first heat-sealing portion 27 is turned into a single sheet. Note that the above-described elastic member 25 for forming a three-dimensional guard is disposed inside the folded three-dimensional guard forming sheet 24. The shape of the first heat fusion part 27 is not particularly limited, and may be any shape such as a circle, an ellipse, a rhombus, a triangle, and a polygon. The area of the seal pattern of one first heat fusion part 27 is preferably 0.5 mm ² or more, from the viewpoint of preventing floating between layers and not impairing the wearing feeling, and 1.5 mm ² or more. More preferably, it is 10 mm ² or less, more preferably 5 mm ² or less, more specifically 0.5 mm ² or more and 10 mm ² or less, preferably 1.5 mm. and more preferably ² or more 5 mm ² or less. The ratio of the total seal pattern area of the plurality of first heat fusion portions 27 to the total area of the folded three-dimensional guard forming sheet 24 may be 2% or more from the viewpoint of ensuring strength and ensuring the softness of the product. Preferably, it is more preferably 5% or more, more preferably 15% or less, further preferably 10% or less, more specifically preferably 2% or more and 15% or less, 5% or more and 10% or less is more preferable. The first heat fusion part 27 is located in the vicinity of the elastic member 25 for forming the three-dimensional guard of the three-dimensional guard forming sheet 24 or in the part where the elastic members 26 for leg gather formation such as the crotch part C are arranged. It is preferable to avoid the elastic member.

  The first heat fusion part 27 can be formed using, for example, heat sealing, ultrasonic sealing, high frequency sealing, or a combination of two or more thereof. The formation pattern of the first heat fusion part 27 of the diaper 1A is a dot pattern arranged in a dotted pattern, but is not limited thereto. For example, a linear heat fusion part is a longitudinal direction of the diaper 1A. It may be a linear pattern formed in one or more directions, a lattice pattern, or the like. Two or more seal patterns may be used in combination.

  With respect to the three-layer structure portion 24b between the layers of the folded three-dimensional guard forming sheet 24, the layers are further joined by the second heat-sealing portion 28. The second heat fusion part 28 has a linear shape and intersects the longitudinal direction (Y direction) of the diaper 1A. Specifically, as shown in FIG. 3, in the diaper 1 </ b> A, a plurality of inner second heat fusion portions 28 </ b> I are substantially equal in the longitudinal direction (Y direction) on the edge 24 </ b> O <b> 1 of the folded outer end portion 24 </ b> O. A plurality of outer second heat-sealing portions 28O are arranged at substantially equal intervals in the longitudinal direction (Y direction) on the edge 24I1 of the inner end 24I. Each inner second heat-sealing portion 28I has a linear shape and intersects the edge 24O1 of the outer end portion 24O extending along the longitudinal direction (Y direction), and the two-layer structure portion 24a and three layers It extends over the structural portion 24b. Each outer second heat-sealing portion 28O also has a linear shape and intersects the edge 24I1 of the inner end 24I extending along the longitudinal direction (Y direction), and the two-layer structure portion 24a. It extends over the three-layer structure portion 24b. As shown in FIG. 3, in the diaper 1 </ b> A, the inner second heat fusion portions 28 </ b> I and the outer second heat fusion portions 28 </ b> O are alternately arranged in the longitudinal direction (Y direction). The angle α formed between each inner second heat-sealed portion 28I and the edge 24O1 of the outer end portion 24O prevents peeling of the heat-sealed portion between the layers of the three-dimensional guard forming sheet when the panel is pulled in the X direction. Therefore, from the viewpoint of dispersing the force in the pulling direction, it is preferably larger than 0 °, more preferably 20 ° or more, and particularly preferably 30 ° or more. Moreover, 70 degrees or less are preferable and 60 degrees or less are still more preferable. More specifically, it is more preferably 20 ° or more and 70 ° or less, and particularly preferably 30 ° or more and 60 ° or less. From the same viewpoint, the angle β formed by each outer second heat-sealed portion 28O and the edge 24I1 of the inner end 24I is preferably larger than 0 °, more preferably 20 ° or more, and more than 30 °. Is particularly preferred. Moreover, 70 degrees or less are preferable and 60 degrees or less are still more preferable. More specifically, it is more preferably 20 ° or more and 70 ° or less, and particularly preferably 30 ° or more and 60 ° or less.

  As described above, the first heat-sealing portion 27 joins at least the two-layer structure portion 24a, and as shown in FIG. 3, it is preferable to also join the three-layer structure portion 24b. Further, the second heat fusion part 28 mainly joins the three-layer structure part 24b, like the outer second heat fusion part 28O and the inner second heat fusion part 28I shown in FIG. In addition, not only the three-layer structure portion 24b but also the two-layer structure portion 24a and the three-layer structure portion 24b may be disposed.

The shape of the inner second heat fusion part 28I and the outer second heat fusion part 28O is not particularly limited, and may be any shape such as an ellipse, a rhombus, a triangle, a polygon, and the like. The seal pattern area of one inner second heat fusion part 28I or one outer second heat fusion part 28O strengthens the heat fusion part of the three-layer structure portion, From the viewpoint of preventing delamination between layers, 1.5 mm ² or more is preferable, 3 mm ² or more is more preferable, 20 mm ² or less is preferable, 10 mm ² or less is more preferable, and more specifically, 1.5 mm ² or more. It is preferably 20 mm ² or less, and more preferably 3 mm ² or more and 10 mm ² or less. Thus, it is preferable that the seal pattern area of one second heat fusion part 28 is larger than the seal pattern area of one first heat fusion part 27. The total of the seal pattern area of the plurality of inner second heat fusion portions 28I and the seal pattern area of the plurality of outer second heat fusion portions 28O with respect to the total area of the folded three-dimensional guard forming sheet 24 The area ratio is preferably 1% or more, more preferably 3% or more, more preferably 10% or less, still more preferably 8% or less, more specifically 1% or more, from the viewpoint of securing strength and wearing feeling. It is preferably 10% or less, and more preferably 3% or more and 8% or less. The interval between the inner second heat fusion portions 28I adjacent to each other in the longitudinal direction (Y direction) or the interval between the outer second heat fusion portions 28O is for ensuring strong heat fusion of the three-layer portion. From the viewpoint, 0.5 mm or more is preferable, 5 mm or less is preferable, 3 mm or less is further preferable, and more specifically 0.5 mm or more and 3 mm or less is more preferable.

As described above, in the diaper 1A, the second heat fusion part 28 is formed of two kinds of fusion parts, that is, the inner second heat fusion part 28I and the outer second heat fusion part 28O. However, it may be formed of only one type of fused portion. When a plurality of such one type of fusion part are arranged at substantially equal intervals in the longitudinal direction (Y direction), the seal pattern area of one type of fusion part is the three-layer structure portion. From the viewpoint of strengthening the heat-sealing part and preventing delamination between layers of the three-dimensional guard forming sheet, it is preferably 1.5 mm ² or more, more preferably 3 mm ² or more, and 20 mm ² or less. Preferably, it is 10 mm ² or less, more specifically 1.5 mm ² or more and 20 mm ² or less, more preferably 3 mm ² or more and 10 mm ² or less. The ratio of the total area, which is the sum of the seal pattern areas of each of the plurality of types of fused portions, to the total area of the folded three-dimensional guard forming sheet 24 is 1% or more from the viewpoint of securing strength and wearing feeling. Preferably, it is 3% or more, more preferably 10% or less, still more preferably 8% or less, and more specifically 1% or more and 10% or less. Preferably, it is 3% or more and 8% or less. The interval between one type of fusion part adjacent in the longitudinal direction (Y direction) is preferably 0.5 mm or more, and 5 mm or less from the viewpoint of securing strong heat fusion of the three-layer part. Is preferably 3 mm or less, and more specifically 0.5 mm or more and 3 mm or less.

  As shown in FIG. 4, the three-dimensional guard forming sheet 24 is fixed to the sheet 31 constituting the side panel 3 on both sides in the longitudinal direction of the absorbent main body 2, and in the diaper 1 </ b> A, the surface side adhesive An outer composite sheet fixed to the sheet 31 via the layer 66 and fixed to the top sheet 21 via an adhesive layer 67 and extending outward in the width direction (X direction) from the side edge of the top sheet. 22 is fixed via a connecting adhesive layer 62. In addition, the three-dimensional guard forming sheet 24 of the diaper 1 </ b> A is fixed to the top sheet 21 via an adhesive layer 68 on both sides in the longitudinal direction of the absorbent main body 2. As shown in FIG. 4, the adhesive layer 68 is provided on the inner side (longitudinal direction center line CL side) than the adhesive layer 67 in the width direction (X direction). While it is provided at B, it is not provided at the crotch C. The adhesive layer 67, the connecting adhesive layer 62, and the surface side adhesive layer 66 other than the adhesive layer 68 are formed over substantially the entire length of the absorbent main body 2.

  In the diaper 1 </ b> A, as shown in FIG. 4, only the three-layer structure portion 24 b is disposed on the surface side adhesive layer 66. That is, in the width direction (X direction), as shown in FIG. 4, the position of the three-layer structure portion 24b and the position of the surface-side adhesive layer 66 coincide. Further, the width of the three-layer structure portion 24b and the width of the surface-side adhesive layer 66 are the same. The ratio of the area of the three-layer structure portion 24b to the total area of the folded three-dimensional guard forming sheet 24 is preferably 3% or more, and more preferably 5% or more from the viewpoint of securing strength and wearing feeling in the three-layer structure portion. It is preferably 25% or less, more preferably 15% or less, specifically 3% or more and 25% or less, and more preferably 5% or more and 15% or less. The width W1 of the three-layer structure portion 24b is preferably 2 mm or more, more preferably 5 mm or more, preferably 20 mm or less, more preferably 15 mm or less, specifically 2 mm or more, from the same viewpoint as the ratio of the area described above. It is preferably 20 mm or less, and more preferably 5 mm or more and 15 mm or less.

  As shown in FIG. 4, the side panel 3 in the diaper 1 </ b> A has a main body side adhesive layer 35, a tip 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 in an extended state between the two sheets 31 and 32 via an adhesive that constitutes each adhesive layer. In addition, at the portion where the elastic member 33 is not interposed, the two sheets 31 and 32 are directly joined to each other via an adhesive constituting each adhesive layer.

  The main body side adhesive layer 35 is provided on the absorbent main body 2 side in the extending direction of the side panel 3, and fixes the end of the individual elastic member 33 on the absorbent main body 2 side or the vicinity thereof. . 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 fixes the end portion of each elastic member 33 on the front-end portion 3a side of the side panel 3 or the vicinity thereof. ing. 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 of the adhesive layers 35 and 36, and a plurality of intermediate adhesive layers 37 are intermittently formed in the intermediate region 30. 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 1A of the present embodiment, the extending direction of the side panel 3 coincides with the diaper width direction.

The main body side adhesive layer 35, the tip side adhesive layer 36, and the intermediate adhesive layer 37 all cross a plurality of (more preferably three or more) elastic members 33 extending in the X direction in the longitudinal direction of the diaper ( (Y direction). The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 all extend in the longitudinal direction of the diaper (Y direction) across all the elastic members 33 extending in the X direction. It is more 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 extends in the longitudinal direction of the diaper (Y direction) intersecting with 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 of the diaper (Y direction) 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.

As shown in FIG. 4, the side panel 3 in the diaper 1 </ b> A has a reinforcing adhesive in which an end 3 b on the absorbent main body 2 side (hereinafter also referred to as a base end 3 b) partially overlaps the main body-side adhesive layer 35. It is reinforced with an agent layer 63. More specifically, as shown in FIG. 4, the sheet 32 positioned on the outer surface side (Q side in FIG. 4) of the two sheets 31 and 32 constituting the side panel 3 is provided. The base panel 3b of the side panel 3 is folded back to the outer surface side (Q side in FIG. 4) of the sheet 32, and the folded portion is the outer surface of the sheet 32 via the reinforcing adhesive layer 63. It is joined to.
Since the base end portion 3b of the side panel 3 is reinforced by such a configuration, the base panel 3b has a moderately high rigidity and has a sufficient strength that is not easily damaged by a tensile force in the X direction.
Regarding the direction in which the sheet constituting the side panel is folded, the “inner side of the sheet” is the P side in the figure (the side facing the skin side of the wearer of the side panel), and the “outer side of the sheet” is the figure. This is the middle Q side (the side facing away from the skin of the side panel wearer).

  In the side panel 3, the base end portion 3 b reinforced in this way is joined to the outer layer composite sheet 22 by the connecting adhesive layer 62. The connection adhesive layer 62 shown in FIG. 4 joins between the base end 3b of the side panel 3 and the leak-proof sheet 22a, and also connects the base end 3b of the side panel 3 and the leak-proof sheet 22a. The outer layer nonwoven fabric 22b extending from the end edge and the leakage preventing sheet 22a and the three-dimensional guard forming sheet 24 and / or the surface sheet 21 are joined. It is preferable that the base end portion 3 b of the side panel is joined to a portion where the leak-proof sheet 22 a and the outer nonwoven fabric 22 b are integrated with the outer adhesive layer 61.

  In the diaper 1 </ b> A, as shown in FIG. 4, the other of the two sheets 31 and 32 constituting the side panel 3 is positioned on the inner surface side (P side in FIG. 4) of the side panel 3. The end 3b of the sheet 31 is not folded back on the outer surface side or the inner surface side of the sheet 31.

As shown in FIG. 4, the main body side adhesive layer 35 is formed to be spaced outward from the outer layer adhesive layer 61 in the width direction (X direction) of the diaper 1 </ b> A. That is, the main body side adhesive layer 35 is formed outward (left side in FIG. 4) from the end 61a of the outer layer adhesive layer 61 on the outer side in the diaper width direction. The agent layer 61 is formed so as to be spaced apart in the X direction without having overlapping portions.
On the other hand, in the diaper width direction (X direction), the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are spaced apart from each other in the diaper width direction. It is overlapped so that the existing part) does not occur. That is, the main body side adhesive layer 35 and the reinforcing adhesive layer 62 have a portion P3 that overlaps each other, and the reinforcing adhesive layer 63 and the connecting adhesive layer 62 also have a portion P2 that overlaps each other. The adhesive layer 62 and the outer adhesive layer 61 also have a portion P1 that overlaps each other. One sheet is interposed between two adhesive layers that overlap each other, one adhesive layer is bonded to one side of the sheet, and the other adhesive layer is bonded to the other side of the sheet. ing.
The main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are formed by shifting the center position in the width direction in the X direction. Further, these adhesive layers 35, 63, 62, 61 are such that the end portions 35a, 63a, 62a, 61a on the front end portion 3a side of the side panel 3 are inward from the outer side in the X direction (left side in FIG. 4). They are arranged in this order toward the side (right side in FIG. 4).

  The main body-side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are formed on the entire length of the fastening tape 4 in the Y direction in the above-described mode (in particular, the mode shown in FIG. 4). It is preferable to extend over the entire length, and in the same manner, it is more preferable to extend over the entire length of the side panel 3 in the Y direction.

As shown in FIG. 4, the side panel 3 of the diaper 1 </ b> A is also reinforced by using a second reinforcing adhesive layer 64 that partially overlaps the front end side adhesive layer 36. More specifically, as shown in FIG. 4, the sheet 32 positioned on the outer surface side (Q side in FIG. 4) of the two sheets 31 and 32 constituting the side panel 3 is provided. The side panel 3 is folded back to the outer surface side (Q side in FIG. 4) of the sheet 32, and the folded portion of the sheet 32 is interposed through the second reinforcing adhesive layer 64. It is joined to the outer surface.
Since the front end portion 3a of the side panel 3 is reinforced by such a configuration, it has a reasonably high rigidity and a sufficient strength that is not easily damaged by the tensile force in the X direction.

In the side panel 3, the tip portion 3 a reinforced in this manner is joined to the fastening tape 4 by the second 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 distal end portion 3 a of the side panel 3 and the tape base material 42 are joined via the second connecting 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 which fastens the fastening tape 4, more specifically, the fastening part 41 of the fastening tape 4, is provided in the outer surface of the stomach side part A of the diaper 1A.

  In the diaper 1 </ b> A, as shown in FIG. 4, the other of the two sheets 31 and 32 constituting the side panel 3 is positioned on the inner surface side (P side in FIG. 4) of the side panel 3. The leading edge 3a of the sheet 31 to be folded is not folded back on the outer surface side or the inner surface side of the sheet 31.

As shown in FIG. 4, in the width direction (X direction) of the diaper 1 </ b> A, the distal-end-side adhesive layer 36 is formed so as to be spaced inward from the second connection adhesive layer 65. That is, the tip side adhesive layer 36 is formed inward (right side in FIG. 4) from the end 65b of the second connection adhesive layer 65 on the inner side in the diaper width direction. And the second connection adhesive layer 65 are formed so as to be separated from each other in the X direction without having a portion overlapping each other.
On the other hand, in the diaper width direction (X direction), the tip side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connection adhesive layer 65 are spaced apart in the diaper width direction (the absence of the adhesive layer). ) So that they do not occur. That is, the tip side adhesive layer 36 and the second reinforcing adhesive layer 64 have a portion P4 that overlaps each other, and the second reinforcing adhesive layer 64 and the second connection adhesive layer 65 also overlap each other. have. One sheet is interposed between two adhesive layers that overlap each other, one adhesive layer is bonded to one side of the sheet, and the other adhesive layer is bonded to the other side of the sheet. ing.
Further, the distal-end-side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connecting adhesive layer 65 are formed by shifting the center position in the width direction in the X direction. In addition, these adhesive layers 36, 64, 65 are arranged so that the end portions 36b, 64b, 65b on the base end portion 3b side of the side panel 3 are the inner sides in the X direction, of both ends in the X direction. They are arranged in this order from the (right side in FIG. 4) to the outer side (left side in FIG. 4).

  It is preferable that the front end side adhesive layer 36 and the second reinforcing adhesive layer 64 extend over the entire length in the Y direction of the fastening tape 4 in the above-described aspect (particularly the aspect shown in FIG. 4). In the same manner, it is more preferable that the side panel 3 extends over the entire length in the Y direction. The second connecting adhesive layer 65 preferably extends in the above-described manner (particularly the embodiment shown in FIG. 4) over a length of 50% or more of the entire length of the fastening tape 4 in the Y direction. In the same manner, it is more preferable that the fastening tape 4 extends over the entire length in the Y direction.

  When the disposable diaper 1A of the first embodiment is attached to a wearer, the fastening tape 41 is pulled by hand, and the fastening portion 41 of the fastening tape 4 is placed in the landing zone while the side panel 3 is extended. Press to 5 and fasten.

  According to the disposable diaper 1A of the first embodiment, as shown in FIG. 3 and FIG. 4, a two-layer structure in which a three-dimensional guard forming sheet 24 is laminated so that both sides of one sheet are folded back and overlap each other. It has a portion 24a and a three-layer structure portion 24b, and the two-layer structure portion 24a and the three-layer structure portion 24b are joined to each other. Therefore, the tensile strength of the three-dimensional guard forming sheet 24 is likely to increase, and even when the fastening tape 4 provided on the side panel 3 to which the three-dimensional guard forming sheet 24 is fixed is pulled when the diaper 1A is attached, It is difficult for the side panel 3 and the absorbent main body 2 to join or in the vicinity thereof, or the side panel 3 is torn or torn, and the feeling of use is improved.

  Further, according to the disposable diaper 1A of the first embodiment, as shown in FIGS. 3 and 4, the layers of the folded three-dimensional guard forming sheet 24 (two-layer structure portion 24a and three-layer structure portion 24b) It is joined by a plurality of first heat fusion parts 27 to form a single sheet. Therefore, when the diaper 1A is worn, even if the fastening tape 4 provided on the side panel 3 to which the solid guard forming sheet 24 is fixed is pulled, the side panel 3 is not easily torn or torn. A feeling improves. In particular, in the diaper 1A, the folded outer end portion 24O is covered with the folded inner end portion 24I. That is, the outer surface of the folded outer end portion 24O and the inner surface of the folded inner end portion 24I are joined by heat fusion, and the three-dimensional guard forming sheet 24 is formed in an annular shape (endless shape). Therefore, even when the fastening tape 4 is pulled when the diaper 1A is attached, the folded outer end portion 24O is not easily affected, the side panel 3 is not easily torn or torn, and the usability is improved. .

  In addition, according to the disposable diaper 1A of the first embodiment, as shown in FIGS. 3 and 4, the three-layer structure portion 24b of the folded three-dimensional guard forming sheet 24 has a plurality of first heat fusion portions 27. In addition, it is joined by a plurality of second heat fusion portions 28 to form a single sheet. Therefore, even if the fastening tape 4 is pulled when the diaper 1A is worn, the side panel 3 is not easily torn or torn, and the usability is improved. In particular, the second thermal fusion part 28 of the diaper 1A is composed of two types of fusion parts, an inner second thermal fusion part 28I and an outer second thermal fusion part 28O. Since the heat-sealed portion 28I and the outer second heat-sealed portion 28Oh are disposed across the two-layer structure portion 24a and the three-layer structure portion 24b, respectively, it becomes a stronger single sheet. ing. Therefore, even if the fastening tape 4 is pulled when the diaper 1A is worn, the side panel 3 is not easily torn or torn, and the usability is improved.

  Further, according to the disposable diaper 1A of the first embodiment, as shown in FIGS. 3 and 4, the three-dimensional guard forming sheet 24 is formed on the sheet 31 constituting the side panel 3 via the surface-side adhesive layer 66. It is fixed. Moreover, the three-dimensional guard forming sheet 24 is laminated so that both side portions of the single three-dimensional guard forming sheet 24 are folded back and overlap each other, and has a two-layer structure portion 24a and a three-layer structure portion 24b. . Thus, since the three-dimensional guard forming sheet 24 is formed in an endless shape, it is difficult for the side panel 3 and the absorbent body 2 to join or in the vicinity thereof, or the side panel 3 is not easily torn or torn. Will improve. Further, since the three-dimensional guard forming sheet has a two-layer or three-layer structure, there is an effect of further preventing leakage during use.

  Further, as in the diaper 1A shown in FIGS. 3 and 4, for example, the three-layer structure portion 24b includes an outer end portion 24O (on the side opposite to the longitudinal center line CL) of the single three-dimensional guard forming sheet 24, and When the inner end portion 24I is folded back to the outer surface side (Q side in FIG. 4) and the folded outer end portion 24O is covered with the folded inner end portion 24I, the inner end portion 24I is folded. Since the inner end 24I and the side panel 3 are fixed by the surface-side adhesive layer 66, the fastening tape 4 is pulled by hand when the wearer wears the side panel 3, and the side panel 3 is extended. However, the endless solid guard forming sheet 24 is not easily torn and the usability is improved.

Like the side panel 3 in the diaper 1A, for example, the base end portion 3b of the side panel 3 is reinforced by the folding and reinforcing adhesive layer 63 of the sheet 32, while the main body side adhesive layer 35 and the outer layer adhesive. When the layer 61 is separated in the X direction, the base end portion 3b of the side panel 3 is compared to the case where all the layers from the sheet 31 to the outer nonwoven fabric 22b are joined at the same position in the X direction. In addition, it is possible to prevent an excessively hard portion from being generated in the vicinity thereof.
The significance that the adhesive layers separated in the X direction are the main body side adhesive layer 35 and the outer layer adhesive layer 61 is to improve the adhesive strength between the side panel 3 and the outer layer composite sheet 22 and to improve the appearance when bonded. is there. The location of the main body side adhesive layer 35 on the side panel 3 tends to become wrinkles due to the contraction of the elastic member 33. When the main body side adhesive layer 35 and the outer layer adhesive layer 61 are not separated from each other in the X direction, the outer layer composite sheet 22 and the side of the side panel 3 having the ridges are joined, and the contact area is reduced and joined. Strength will fall. Moreover, the wrinkles of the side panel 3 also appear on the outer surface of the outer composite sheet due to the bonding. However, in the diaper 1A, since the adhesive layers that are separated in the X direction are the main body side adhesive layer 35 and the outer adhesive layer 61, such a problem can be avoided.
In addition, by using a breathable sheet such as a nonwoven fabric for the sheets 31 and 32 and the like, it becomes easy to ensure good breathability in the vicinity of the joint portion between the side panel 3 and the absorbent main body 2.

  Further, as in the diaper 1A, for example, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, and the outer adhesive layer 61 are overlapped so that there is no gap between them, When the adhesive layer is substantially continuous in the X direction, the side panel 3 is pulled to a portion of the side panel 3 and the absorbent main body 2 extending from the main body side adhesive layer 35 to the outer adhesive layer 61. It is possible to secure a sufficient strength that is difficult to break.

Moreover, like the side panel 3 of the diaper 1A, for example, the front end portion 3a of the side panel 3 is also reinforced by the folding of the sheet 32 and the second reinforcing adhesive layer 64, and the reinforced front end portion 3a is Since it is joined to the fastening tape 4 by the second connecting adhesive layer 65, the strength of the fastening portion of the fastening tape 4 in the side panel 3 can be enhanced.
Further, as in the case of the diaper 1A, for example, if the front end side adhesive layer 36 and the second connecting adhesive layer 65 are separated in the X direction, the total from the sheet 31 to the tape base material 42 of the fastening tape 4 is achieved. Compared to the case where all the layers are joined at the same position in the X direction, it is possible to prevent an excessively hard portion from being generated at the connection portion between the fastening tape 4 and the side panel 3 or in the vicinity thereof. . Further, by using a breathable sheet such as a non-woven fabric for the sheets 31, 32, etc., it becomes easy to ensure good breathability in the vicinity of the side panel 3 and the tip portion 3a.

Further, as in the diaper 1A, for example, the tip side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connecting adhesive layer 65 are overlapped so that no gap is formed between them, and the adhesive When the layers are substantially continuous in the X direction, even if the fastening tape 4 is pulled in the portion extending from the second connecting adhesive layer 65 to the distal-side adhesive layer 36 in the fastening tape 4 and the side panel 3. Sufficient strength that is difficult to break can be secured.
Since the diaper 1A of the first embodiment has the above-described configuration, even if a strong tensile force is applied to the fastening tape 4 or the side panel 3, the entire area extending from the fastening tape 4 to the absorbent main body 2 may be torn or torn. Damage is unlikely to occur.

  In the intermediate region 30 of the disposable diaper 1A, an intermediate adhesive layer 37 is formed by providing a non-adhesive region 38 between adjacent adhesive layers. In the natural state of the diaper 1A, an elastic member Due to the contraction of 33, the two sheets 31, 32 in the non-adhesion region 38 swell in the direction away from the elastic member 33, and a plurality of sheets extending on both sides of the side panel 3 so as to straddle the plurality of elastic members 33.襞 (not shown) is 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.

  As described above, the front surface side adhesive layer 66, the adhesive layer 67, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connecting adhesive layer 62, the outer layer adhesive layer 61, the front end side adhesive layer 36, (2) The reinforcing adhesive layer 64, the second connecting adhesive layer 65, and the intermediate adhesive layer 37 were coated with adhesive by any known method on one or both of the two sheets sandwiching each of them. Thereafter, the two sheets can be formed by overlapping and pressing.

  The adhesive coating pattern for forming each adhesive layer is preferably a so-called solid coating using a spray gun, coater gun or the like as an adhesive coating machine, but a bead gun as an adhesive coating machine. Using 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 and 2 mm or less from the viewpoint of improving the flexibility of the side panel 3 and ensuring stretchability. It is preferably 1 mm or less, more preferably 0.1 mm or more and 2 mm or less, and more preferably 0.1 mm or more and 1 mm or less. The number of elastic members 33 arranged on the side panel 3 is preferably 4 or more, more preferably 10 or more, more preferably 30 or less, still more preferably 20 or less, specifically 4 or more 30. The number is preferably about 10 or less, more preferably 10 or more and 20 or less.

  From the viewpoint of more reliably obtaining one or more of the effects described above, the width of the portion P3 where the main body side adhesive layer 35 and the reinforcing adhesive layer 62 overlap is preferably 2 mm or more, more preferably 4 mm or more, Moreover, 10 mm or less is preferable, specifically, it is preferable that it is 2 mm or more and 10 mm or less, and it is especially preferable that they are 4 mm or more and 10 mm or less. The width of the portion P2 where the reinforcing adhesive layer 63 and the connecting adhesive layer 62 overlap is preferably 5 mm or more, more preferably 10 mm or more, and preferably 20 mm or less, specifically 5 mm or more and 20 mm or less. In particular, it is preferably 10 mm or more and 20 mm or less. The width of the portion P1 where the connecting adhesive layer 62 and the outer adhesive layer 61 overlap is preferably 5 mm or more, more preferably 10 mm or more, more preferably 20 mm or less, specifically preferably 5 mm or more and 20 mm or less, In particular, it is preferably 10 mm or more and 20 mm or less. Further, the distance between the main body side adhesive layer 35 and the outer adhesive layer 61 is preferably 0.5 mm or more, more preferably 5 mm or more, and preferably 10 mm or less, specifically 0.5 mm or more and 10 mm or less. It is preferable that it is especially 5 mm or more and 10 mm or less. The width of the reinforcing adhesive layer 63 is preferably 5 mm or more, more preferably 10 mm or more, more preferably 20 mm or less, specifically preferably 5 mm or more and 20 mm or less, and particularly preferably 10 mm or more and 20 mm or less. preferable.

From the same viewpoint, the width of the portion P4 where the tip side adhesive layer 36 and the second reinforcing adhesive layer 64 overlap is preferably 2 mm or more, more preferably 5 mm or more, and preferably 10 mm or less. Is preferably 2 mm or more and 10 mm or less, and particularly preferably 5 mm or more and 10 mm or less. The width of the portion P5 where the second reinforcing adhesive layer 64 and the second connecting adhesive layer 65 overlap is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 15 mm or less, specifically 5 mm or more and 15 mm. The following is preferable, and it is particularly preferable that the distance is 10 mm or more and 15 mm or less. Further, the separation distance between the tip side adhesive layer 36 and the second connecting adhesive layer 65 is preferably 0.5 mm or more, more preferably 5 mm or more, and preferably 10 mm or less, specifically 0.5 mm or more. It is preferably 10 mm or less, particularly preferably 5 mm or more and 10 mm or less. The width of the second reinforcing adhesive layer 64 is preferably 5 mm or more, more preferably 10 mm or more, more preferably 20 mm or less, specifically preferably 5 mm or more and 20 mm or less, and particularly preferably 10 mm or more and 20 mm or less. Is preferred.
The widths of the portions P1 to P5, the reinforcing adhesive layer 62 and the second reinforcing adhesive layer 64, the separation distance between the main body side adhesive layer 35 and the outer adhesive layer 61, and the front end side adhesive layer 36 and the first side The separation distance from the two-connection adhesive layer 65 is a dimension or distance measured along the X direction.

  The dimensions of these parts 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 spread out in a flat state without any influence of the elastic member. Measure in the expanded state.

  In the diaper 1 </ b> A, as shown in FIG. 4, a surface side adhesive layer 66 for fixing the three-dimensional guard forming sheet 24 and the sheet 31 constituting the inner surface side of the side panel 3, and the main body side adhesive layer 35. Is also spaced apart in the X direction. Thereby, by the joining by the surface side adhesive layer 66, the joining strength of the side panel 3 to the absorbent main body 2 is improved, and the rigidity in the vicinity of the joining portion is also prevented from being excessively increased. Further, in the side panel 3 in the diaper 1A, the elastic member 33 is fixed to each of the main body side adhesive layer 35 and the front end side adhesive layer 36 in an extended state.

The constituent material of the diaper 1A will be described.
As the sheets 31 and 32 constituting the side panel 3 and the tape base material 42 of the fastening tape 4, various sheet materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins are used without particular limitation. be able to.
For example, as the sheets 31 and 32 and the tape base material 42, a nonwoven fabric, a woven fabric, a film, or a laminated sheet thereof can be used.
As the surface sheet 21, the outer layer composite sheet 22, and the absorbent body 23 constituting the absorbent main body 2, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. it can. For example, as the surface sheet 21, a hydrophilic and liquid-permeable nonwoven fabric, a three-dimensional aperture film, or the like can be used. As the outer layer composite sheet 22, the leak-proof sheet 22a is a liquid-impermeable or liquid-impervious (including water repellency) resin film, and the outer layer nonwoven fabric 22b is a nonwoven fabric produced by various manufacturing methods (for example, an air-through nonwoven fabric or a spunbond nonwoven fabric). , Spunlace nonwoven fabric, needle punched nonwoven fabric, etc.). The outer layer nonwoven fabric 22b may have a multilayer structure. Moreover, as the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held by the absorbent core 23 is made of water-permeable thin paper or non-woven fabric. Those coated with a core wrap sheet can be used. As the three-dimensional guard forming sheet 24 constituting 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 34 for fixing the elastic member 33, include amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate ester copolymer. Polymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / Thermoplastic polymers such as propylene-styrene block copolymer (SEPS) and mixtures thereof. The adhesive is preferably a hot melt type.

  Next, the disposable diaper of the 2nd-4th embodiment of this invention is demonstrated. In the disposable diapers 1B, 1C, 1D of the second to fourth embodiments, the configuration of the three-dimensional guard forming sheet 24 and the joining mode of the absorbent main body 2 and the side panel 3 and the three-dimensional guard forming sheet 24 are the first implementation. Different from diaper 1A in form. The diapers 1B, 1C, and 1D of the second to fourth embodiments will be described mainly with respect to differences from the diaper 1A of the first embodiment, and the same points are denoted by the same reference numerals and description thereof will be omitted. About the point which is not mentioned especially, the description regarding the diaper 1A of 1st Embodiment is applied suitably.

  As shown in FIGS. 5 and 6, the three-layer structure portion 24 b of the diaper 1 </ b> B has an outer end portion 24 </ b> O (on the side opposite to the longitudinal center line CL) on the side panel 3 side of the single three-dimensional guard forming sheet 24. The inner end 24I on the absorbent main body 2 side (longitudinal center line CL side) is folded back to the outer surface side (Q side in FIG. 6). The three-layer structure portion of the diaper 1B is formed by covering the folded inner end portion 24I with the folded outer end portion 24O. That is, the outer surface of the folded inner end portion 24I and the inner surface of the folded outer end portion 24O are joined by thermal fusion.

  As shown in FIG. 5, the first heat-sealing between the layers (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded three-dimensional guard forming sheet 24 as shown in FIG. The three-dimensional guard forming sheet 24 joined and joined by the portion 27 is formed into a single sheet.

  Regarding the three-layer structure portion 24b between the layers of the folded three-dimensional guard forming sheet 24, as shown in FIG. 5, in the diaper 1B, a plurality of portions are formed on the edge 24O1 of the folded outer end portion 24O. The inner second thermal fusion bonding portions 28I are arranged at substantially equal intervals in the longitudinal direction (Y direction), and a plurality of outer second thermal fusion bonding portions 28O are longitudinal on the edge 24I1 of the inner end 24I. They are arranged at substantially equal intervals in the direction (Y direction). Each inner second heat fusion portion 28I intersects the edge 24O1 of the outer end portion 24O, and is disposed across the two-layer structure portion 24a and the three-layer structure portion 24b. Each outer second heat-sealing portion 28O intersects the edge 24I1 of the inner end portion 24I and is disposed across the two-layer structure portion 24a and the three-layer structure portion 24b. As shown in FIG. 5, in the diaper 1, each inner second heat fusion part 28 </ b> I and each outer second heat fusion part 28 </ b> O are arranged at substantially equal positions in the longitudinal direction (Y direction). Yes. An angle γ formed between each inner second heat-sealed portion 28I and the edge 24O1 of the outer end portion 24O prevents peeling of the heat-sealed portion between the layers of the three-dimensional guard forming sheet when the panel is pulled in the X direction. Therefore, from the viewpoint of dispersing the force in the tensile direction, 20 ° or more is preferable, 30 ° or more is more preferable, 70 ° or less is preferable, 60 ° or less is more preferable, and more specifically 20 ° or more. It is preferably 70 ° or less, and more preferably 30 ° or more and 60 ° or less. The angle formed between each outer second heat-sealed portion 28O and the edge 24I1 of the inner end portion 24I is an angle γ formed between each inner second heat-fused portion 28I and the edge 24O1 of the outer end portion 24O. The same.

  The interval between the inner second heat fusion portions 28I adjacent to each other in the longitudinal direction (Y direction) or the interval between the outer second heat fusion portions 28O is for ensuring strong heat fusion of the three-layer portion. From the viewpoint, it is preferably 5 mm or less.

  The solid guard forming sheet 24 of the diaper 1B is fixed to the top sheet 21 via an adhesive layer 67 on both sides in the longitudinal direction of the absorbent main body 2 as shown in FIG. Fixed to the outer composite sheet 22 extending outward in the width direction (X direction) via the adhesive layer 62 for connection, and fixed to the sheet 31 constituting the side panel 3 via the surface-side adhesive layer 66. ing. Further, the three-dimensional guard forming sheet 24 is fixed to the top sheet 21 via an adhesive layer 68 on both side portions in the longitudinal direction of the absorbent main body 2. The adhesive layer 68 is provided on the inner side (longitudinal direction center line CL side) in the width direction (X direction) than the adhesive layer 67 and is provided on the abdominal side portion A and the back side portion B. Part C is not provided. The adhesive layer 67, the connecting adhesive layer 62, and the surface side adhesive layer 66 other than the adhesive layer 68 are formed over substantially the entire length of the absorbent main body 2.

  In the diaper 1 </ b> B, as shown in FIG. 6, the three-layer structure portion 24 b and the two-layer structure portion 24 a are arranged on the surface-side adhesive layer 66. That is, in the width direction (X direction), the position of the surface side adhesive layer 66 straddles the two-layer structure portion 24a and the three-layer structure portion 24b on the outer side in the width direction (X direction).

  According to the diaper 1B of the second embodiment, the same effects as the diaper 1A of the first embodiment can be obtained. In particular, according to the diaper 1B, the outer end 24O is not the inner end 24I. Since it is joined to the side panel 3, when the diaper 1 </ b> B is attached or at the time of attachment, the outer end 24 </ b> O receives and cushions the pull from the side panel 3 to absorb the side panel 3 and the side panel 3. The effect which further prevents the tearing and tearing of the junction part vicinity of the sex main body 2 is show | played.

  The three-layer structure portion 24b of the diaper 1C is, as shown in FIGS. 7 and 8, an outer end portion 24O on the side panel 3 side of one solid guard forming sheet 24 (on the side opposite to the longitudinal center line CL). The inner end 24I on the absorbent main body 2 side (longitudinal direction center line CL side) is folded back to the inner surface side (P side in FIG. 8). The three-layer structure portion of the diaper 1C is formed such that the folded outer end portion 24O is covered with the folded inner end portion 24I. That is, the inner surface of the folded outer end portion 24O and the outer surface of the folded inner end portion 24I are joined by thermal fusion.

  As shown in FIG. 7, the first heat-sealing between the layers (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded three-dimensional guard forming sheet 24 is arranged in the form of dots as shown in FIG. The three-dimensional guard forming sheet 24 joined and joined by the portion 27 is formed into a single sheet.

  With respect to the three-layer structure portion 24b between the layers of the folded three-dimensional guard forming sheet 24, as shown in FIG. 7, in the diaper 1C, the folded outer end portion 24O and the folded inner portion A plurality of second heat fusion portions 28 are arranged at substantially equal intervals in the longitudinal direction (Y direction) on the portion (three-layer structure portion 24b) where the end portion 24I overlaps. Each second heat fusion portion 28 is disposed between the edge 24O1 of the outer end portion 24O and the edge 24I1 of the inner end portion 24I, and each second heat fusion portion 28 and the inner end thereof. The angle δ formed with the edge 24I1 of the portion 24I is from the viewpoint of dispersing the force in the pulling direction in order to prevent peeling of the heat fusion portion between the layers of the three-dimensional guard forming sheet in panel tension in the X direction. 20 ° or more, preferably 30 ° or more, more preferably 70 ° or less, still more preferably 60 ° or less, and more specifically preferably 20 ° or more and 70 ° or less, and 30 ° or more and 60 °. More preferably, it is as follows.

The seal pattern area of one second heat-sealing portion 28 is 1.5 mm ² or more from the viewpoint of strengthening the heat-sealing portion of the three-layer structure and preventing delamination between the three-dimensional guard forming sheets. 3 mm ² or more is more preferable, 20 mm ² or less is preferable, 10 mm ² or less is more preferable, and more specifically, 1.5 mm ² or more and 20 mm ² or less is preferable, and 3 mm ² or more and 10 mm ² or less is preferable. More preferably it is. The ratio of the total seal pattern area of the plurality of second heat fusion portions 28 to the total area of the folded three-dimensional guard forming sheet 24 is preferably 1% or more and 10% or less from the viewpoint of securing strength. In FIG. 7, only one row of heat fusion parts is shown, but a plurality of rows may be provided. The interval between the second heat-sealing portions 28 adjacent in the longitudinal direction (Y direction) in one row is preferably 5 mm or less from the viewpoint of ensuring strong heat-sealing of the three-layer portion.

  The solid guard forming sheet 24 of the diaper 1C is fixed to the top sheet 21 via an adhesive layer 67 on both sides in the longitudinal direction of the absorbent main body 2 as shown in FIG. Fixed to the outer composite sheet 22 extending outward in the width direction (X direction) via the adhesive layer 62 for connection, and fixed to the sheet 31 constituting the side panel 3 via the surface-side adhesive layer 66. ing. Further, the three-dimensional guard forming sheet 24 is fixed to the top sheet 21 via an adhesive layer 68 on both side portions in the longitudinal direction of the absorbent main body 2.

  In the diaper 1 </ b> C, as shown in FIG. 8, only the two-layer structure portion 24 a is disposed on the surface side adhesive layer 66. That is, in the width direction (X direction), as shown in FIG. 8, the three-layer structure portion 24b is arranged inward in the width direction (X direction) with respect to the surface-side adhesive layer 66, and further the base of the side panel 3. It is arranged inward in the width direction (X direction) from the end 3b, and the position of the surface side adhesive layer 66 coincides with the position of the two-layer structure portion 24a on the outer side in the width direction (X direction). Yes.

  According to the diaper 1 </ b> C of the third embodiment, the same effects as the diaper 1 </ b> A of the first embodiment can be obtained. In particular, according to the diaper 1 </ b> C, the panel bonding surface (the outer end of the three-dimensional guard forming sheet 24). Since the side opposite to the side where the portion 24O and the inner end portion 24I are folded back (the surface bonded to the outer surface side (Q side in FIG. 8)) is smooth, there is an effect of further strengthening the mounting strength of the panel.

  As shown in FIGS. 9 and 10, the three-layer structure portion 24b of the diaper 1D has an outer end portion 24O (center in the longitudinal direction) on the side panel 3 side of one solid guard forming sheet 24, as in the diaper 1A. The inner end portions 24I on the side opposite to the line CL) and the absorbent main body 2 side (longitudinal central line CL side) are respectively folded back to the outer surface side (Q side in FIG. 10). And the three-layer structure part of the diaper 1B is formed so that the folded outer end portion 24O is covered with the folded inner end portion 24I, like the diaper 1A.

  Like the diaper 1A, the layers (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded three-dimensional guard forming sheet 24 have a plurality of first heats arranged in the form of dots as shown in FIG. The three-dimensional guard forming sheet 24 that is joined by the fusion part 27 and folded is formed into a single sheet.

  Regarding the three-layer structure portion 24b between the layers of the folded three-dimensional guard forming sheet 24, as shown in FIG. 9, on the edge 24O1 of the folded outer end portion 24O, as in the diaper 1A. A plurality of inner second heat fusion portions 28I are arranged at substantially equal intervals in the longitudinal direction (Y direction), and a plurality of outer second heat fusion portions 28O are formed on the edge 24I1 of the inner end portion 24I. They are arranged at substantially equal intervals in the longitudinal direction (Y direction). Each inner second heat-sealed portion 28I intersects at an angle α formed with the edge 24O1 of the outer end portion 24O, like the diaper 1A, and straddles the two-layer structure portion 24a and the three-layer structure portion 24b. Are arranged. Each outer second heat-sealed portion 28O intersects at an angle β formed with the edge 24I1 of the inner end portion 24I, like the diaper 1A, and the two-layer structure portion 24a and the three-layer structure portion 24b It is arranged across. As shown in FIG. 9, in the diaper 1 </ b> D, the inner second heat fusion portions 28 </ b> I and the outer second heat fusion portions 28 </ b> O are alternately arranged in the longitudinal direction (Y direction).

  Similarly to the diaper 1A, the interval between the inner second heat fusion portions 28I adjacent in the longitudinal direction (Y direction) or the interval between the outer second heat fusion portions 28O may be 0.5 mm or more. It is preferably 5 mm or less, more preferably 3 mm or less, more specifically 0.5 mm or more and 3 mm or less.

  The three-dimensional guard forming sheet 24 of the diaper 1D is fixed to the top sheet 21 via an adhesive layer 67 on both sides in the longitudinal direction of the absorbent main body 2 as shown in FIG. Fixed to the outer composite sheet 22 extending outward in the width direction (X direction) via the adhesive layer 62 for connection, and fixed to the sheet 31 constituting the side panel 3 via the surface-side adhesive layer 66. ing. Further, the three-dimensional guard forming sheet 24 is fixed to the top sheet 21 via an adhesive layer 68 on both side portions in the longitudinal direction of the absorbent main body 2.

  In the diaper 1 </ b> D, as shown in FIG. 10, only the two-layer structure portion 24 a is disposed on the surface side adhesive layer 66. That is, in the width direction (X direction), the three-layer structure portion 24b is arranged inward in the width direction (X direction) with respect to the surface side adhesive layer 66 as shown in FIG. It is arranged inward in the width direction (X direction) from the end 3b, and the position of the surface side adhesive layer 66 coincides with the position of the two-layer structure portion 24a on the outer side in the width direction (X direction). Yes.

  According to the diaper 1D of the fourth embodiment, the same operational effects as the diaper 1A of the first embodiment can be obtained. In particular, according to the diaper 1D, the outer end 24O is not the inner end 24I. Since it is joined to the side panel 3, when the diaper 1 </ b> D is worn or at the time of wearing, the outer end 24 </ b> O receives and cushions the pull from the side panel 3 to absorb the side panel 3 and the side panel 3. The effect which further prevents the tearing and tearing of the junction part vicinity of the sex main body 2 is show | played.

The disposable diaper, the side panel, and the three-dimensional guard forming sheet of the present invention are not limited in its manufacturing method, and can be manufactured by any method.
About the preferable example of the manufacturing method of the side panel in a disposable diaper, the case where the side panel 3 in the diaper of 1st-4th embodiment is manufactured is demonstrated to an example.

  An example of a preferable manufacturing method of the side panel 3 will be described with reference to FIG. 11. The stretchable sheet manufacturing apparatus 7 shown in FIG. 11 is a pair of longitudinal structures for conveying a yarn arranged in parallel at a predetermined interval. 71, 71 and an elastic member wound around a pair of longitudinal structures for yarn conveyance so that the direction of the elastic members intersects the longitudinal direction of the longitudinal structure for yarn conveyance (R direction in the figure) The body winding means 72 and the elastic member 33 wound around the elastic body winding means 72 and conveyed by the long structure for yarn conveyance are integrally sandwiched between a pair of belt-like sheets 31 ′ and 32 ′. And integrating means 73 to be converted. The longitudinal structure 71 for yarn conveyance has a forward running portion that moves in the R direction and a reverse feeding portion that moves in the opposite direction to the R direction, and only the forward running portion engages with the elastic member 33 to An endless belt that 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. Further, only one such endless belt can be used as each individual yarn conveying longitudinal structure 71. However, as shown in FIG. It is preferable to use an endless belt arranged in two upper and lower stages. By providing a difference in speed between the upper and lower belts, the elastic member 33 is spaced in the R direction in the direction of the elastic member 33 that was zigzag in plan view when wound around the pair of longitudinal structures 71 for yarn conveyance. And can be fixed between a pair of belt-like sheets 31 ′ and 32 ′. As the thread conveying longitudinal structure 71, a round bar-like body having grooves and ridges spirally formed on the peripheral surface thereof and driven to rotate around the central axis can also be used.

In a preferred manufacturing method of the side panel 3, as shown in FIG. 11, a reinforcing adhesive layer 63 and a second reinforcing adhesive layer 64 are formed on a belt-like sheet 32 ′ that is a raw sheet of the sheet 32. Adhesives 63 ′ and 64 ′ are continuously applied in a strip shape by a known adhesive coating machine 75, and then both sides of the strip sheet 32 ′ are covered so as to cover both the adhesives 63 ′ and 64 ′. The part is folded back to the surface not facing the belt-like sheet 31 ′ by a sailor guide (not shown) or the like. On the other hand, an adhesive 34 for forming the main body side adhesive layer 35, the tip side adhesive layer 36 and the intermediate adhesive layer 37 is applied to the belt-like sheet 31 ′ which is the raw sheet of the sheet 31. Each of the machines 76 is continuously applied in a strip shape. The adhesive 34 may be continuously applied to the belt-like sheet 32 ′.
Then, the belt-like sheets 31 ′ and 32 ′ after the adhesive application are merged so that the elastic member 33 in an extended state is sandwiched between them, and the pair of nip rolls 74 as the integration means 73 are used to join them. Apply pressure from above and below to integrate. And the elastic sheet 3 'is obtained by cut | disconnecting the elastic member 33 extended to the side by cutting means 77, such as a cutter provided with the cutting blade.
Then, the obtained elastic sheet 3 ′ is sequentially cut to the length of each side panel by an arbitrary cutting means. In this way, the side panel 3 can be efficiently and continuously produced.

In the manufacturing method of a disposable diaper, a disposable diaper can be manufactured according to a conventionally well-known method except using said side panel 3 (elastic sheet | seat 3 ').
In a preferable manufacturing method, for example, a diaper can be efficiently manufactured by the following procedures (1) to (10) using the side panel 3 (elastic sheet 3 ′). (1) The continuous web of the fastening tape 4 coated with the adhesive for forming the second connection adhesive layer 65 is cut, and the continuous web of the elastic sheet 3 ′ obtained as described above is cut. Install intermittently. (2) The fastening tape 4 is folded and temporarily fixed to the stretchable sheet 3 ′. (3) An adhesive (for main body connection) for forming the connection adhesive layer 62 is continuously applied to the stretchable sheet 3 ′. (4) In order to obtain the three-dimensional guard forming sheet 24, the continuous sheet is folded in a separate process so that the folded portion is formed. The elastic member 25 is fixed to the bent portion with an adhesive in an extended state. Next, the first heat fusion part 27 is provided by heat sealing or the like, and the second heat fusion part 28 is continuously formed. (5) A top sheet continuous body is formed by integrating the three-dimensional guard forming sheet 24 and the top sheet 21 obtained in separate steps via the adhesive layers 67 and 68. (6) The leak-proof sheet 22a and the outer-layer nonwoven fabric 22b are integrated in a separate process to form the outer-layer composite sheet 22. (7) The stretchable sheet 3 ′ is intermittently cut and attached to the surface sheet 21 (three-dimensional guard forming sheet 24) via the surface side adhesive layer 66, and the outer layer composite sheet 22 via the connection adhesive layer 62. Attach to. (8) The absorbent body 23 is sandwiched between the top sheet 21 and the outer composite sheet 22 and integrated. (9) Fold both sides of the product (side panel protruding part) inward. (10) Cut into one product.

  In the preferred manufacturing method described above, after the first thermal fusion part 27 is formed, the second thermal fusion part 28 is further formed, but the first thermal fusion part is formed on the same roll. 27 and a convex portion corresponding to the second heat fusion portion 28 may be provided, and the first heat fusion portion 27 and the second heat fusion portion 28 may be formed simultaneously.

  The manufacturing method of a disposable diaper can manufacture a disposable diaper according to a conventionally well-known method except manufacturing a disposable diaper using the side panel 3 obtained as mentioned above.

  As an apparatus for sandwiching and fixing an elastic member between a pair of belt-like sheets, the apparatus shown in FIGS. 11 and 12 of Patent Document 1 can also be used.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, the disposable diaper of this invention is the diaper 1A of the above-mentioned 1st Embodiment, the diaper 1B of the above-mentioned 2nd Embodiment, and the diaper of the above-mentioned 3rd Embodiment. It is not limited to 1C at all, and can be changed as appropriate. Moreover, each component in the diaper 1A-1D of the above-mentioned 1st-4th embodiment can be implemented in combination suitably in the range which does not impair the meaning of this invention.

  For example, in the diapers 1A to 1D of the first to fourth embodiments described above, the layers (two-layer structure portion 24a and three-layer structure portion 24b) of the folded three-dimensional guard forming sheet 24 are illustrated in FIGS. 7 and FIG. 9, the three-layer structure portion 24 b is joined by the second heat-sealed portion 28, and is joined by a plurality of first heat-sealed portions 27 arranged in the form of dots. However, unlike the diaper 1E of the other embodiment shown in FIG. 12, the second heat fusion part 28 is not provided, and the two-layer structure part 24a and the three-layer structure part 24b are formed only by the first heat fusion part 27. You may join. Further, the folded layers of the three-dimensional guard forming sheet 24 (only the two-layer structure portion 24 a) are joined by the first heat-sealing portion 27, and only the three-layer structure portion 24 b is joined by the second heat-sealing portion 28. It may be joined.

  Further, the interlayer bonding of the folded three-dimensional guard forming sheet 24 is bonded by thermal fusion, but may be bonding by an adhesive. Alternatively, the first heat fusion part 27 may not be provided, and the two-layer structure part may be joined by an adhesive, and the three-layer structure part may be joined by the second heat fusion part 28.

  In the diapers 1A, 1B, and 1D of the first, second, and fourth embodiments described above, the second heat fusion part 28 includes the inner second heat fusion part 28I and the outer second heat fusion part. Although formed from two types of fused portions with the portion 28O, it may be formed from only one type of fused portion. In the case where it is formed of only one type of fusion part, as in the second heat fusion part 28 of the diaper 1C of the above-described third embodiment, substantially equal intervals are provided in the longitudinal direction (Y direction). In addition to a plurality of arrangements, a linear shape extending in the longitudinal direction (Y direction) in a zigzag (sawtooth) shape or a wave shape may be used.

  Further, in the diapers 1A and 1D of the first and fourth embodiments described above, as shown in FIGS. 3 and 9, each inner second heat-sealing portion 28I and the edge 24O1 of the outer end portion 24O are provided. Intersecting at an angle α, and intersecting at an angle β formed by each outer second heat-sealing portion 28O and an edge 24I1 of the inner end portion 24I. In the diaper 1B of the second embodiment described above, FIG. As shown in FIG. 5, each inner second heat-sealed portion 28I and the edge 24O1 of the outer end portion 24O intersect each other at an angle γ, and each outer second heat-sealed portion 28O and the inner end portion 24I. In the diaper 1C of the third embodiment described above, as shown in FIG. 7, each second heat-sealed portion 28 and the edge 24I1 of the inner end portion 24I are crossed at an angle γ formed by the edge 24I1 of the second embodiment. However, the angle formed by these may be an angle other than the range described above.

  In the diapers 1A to 1D of the first to fourth embodiments described above, the three-dimensional guard forming sheet 24 is fixed to the sheet 31 via the surface-side adhesive layer 66, but heat other than the adhesive is used. It may be fixed by fusion.

  In the diapers 1A to 1D of the first to fourth embodiments described above, the sheet 32 constituting the side panel 3 is folded and joined to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64). However, it does not have to be folded. Further, even if the sheet 32 constituting the side panel 3 is folded back and joined to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64), the base panel 3b side or the distal end part 3a side of the side panel 3 is used. The end of the sheet 32 may be folded back to the inner surface side (P side in FIGS. 4, 6, and 8), or the sheet 31 may be folded instead of the sheet 32 constituting the side panel 3. Further, both the sheet 32 and the sheet 31 may be folded. Further, instead of folding back the sheet 32 constituting the side panel 3, sheets of different materials may be stacked and joined to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64).

  Moreover, in the diaper 1A-1D of the above-mentioned 1st-4th embodiment, as shown in FIG. 1, although the side panel 3 is each attached to both the side parts of the absorptive main body 2, The form attached to the side part may be sufficient.

  Further, in the diapers 1A to 1D of the first to fourth embodiments described above, as shown in FIGS. 4, 6, and 8, the tape base material 42 of the fastening tape 4 is provided on the outer surface of the sheet 32 (the sheet 31 side). The tape base material 42 is joined to the inner surface (the surface that is not the sheet 32 side) side of the sheet 31 by the adhesive or the sheet 31 and the sheet 31. It may be arranged between the sheet 32 and bonded by an adhesive.

The following disposable diaper is further disclosed regarding the embodiment mentioned above.
<1> Absorbent body, an absorbent main body including a surface sheet disposed on the inner surface side of the absorbent body and an outer layer composite sheet disposed on the outer surface side of the absorbent body, and one or both of the longitudinal direction of the absorbent main 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,
The absorbent main body has a three-dimensional guard forming sheet disposed on both sides in the longitudinal direction of the absorbent main body,
The three-dimensional guard forming sheet has a two-layer structure portion and a three-layer structure portion formed by folding both sides of one sheet so as to overlap each other, and the two-layer structure portion and the three-layer structure portion. Are disposable diapers in which the layers are bonded to each other, and are fixed to the sheet constituting the side panel on both longitudinal sides of the absorbent main body.

<2> The disposable diaper according to <1>, wherein the interlayer is joined by heat fusion.
<3> The disposable diaper according to <1> or <2>, wherein the three-dimensional guard forming sheet is fixed to a sheet constituting the side panel via a surface-side adhesive layer.
<4> The three-layer structure portion includes an outer end portion on the side panel side and an inner end portion on the absorbent main body side of the three-dimensional guard forming sheet. The disposable diaper according to any one of <1> to <3>, wherein the disposable diaper is folded back and formed on the outer surface side.
<5> The three-layer structure portion includes an outer end portion on the side panel side and an inner end portion on the absorbent main body side of one sheet of the three-dimensional guard forming sheet. The disposable diaper according to any one of <1> to <3>, wherein the disposable diaper is formed by being folded back on the inner surface side.
<6> The three-layer structure portion according to any one of <1> to <4>, wherein the folded outer end portion is covered with the folded inner end portion. Disposable diapers.
<7> The three-layer structure portion according to any one of <1> to <3>, wherein the folded inner end portion is covered with the folded outer end portion. Disposable diapers.
<8> The disposable diaper according to <7>, wherein the outer end is joined to the side panel.

<9> The disposable diaper according to any one of <1> to <8>, wherein the two-layer structure portion of the folded three-dimensional guard forming sheet is joined by a first heat-sealing portion.
<10> The two-layer structure portion and the three-layer structure portion of the folded three-dimensional guard forming sheet are joined to any one of <1> to <8>, which are joined by a first heat-sealing portion. The disposable diaper described.
<11> The first heat fusion part is arranged in a plurality of scattered spots, and the shape of the first heat fusion part is a circle, an ellipse, a rhombus, a triangle, or a polygon. <9> Or the disposable diaper as described in <10>.
<12> The seal pattern area of one of the first heat-sealing portions is 0.5 mm ² or more, 1.5 mm ² or more, 10 mm ² or less, or 5 mm ² or less, 0 .5mm ² or 10 mm ² or less or where it is 1.5 mm ² or more 5 mm ² or less wherein <9> the disposable diaper according to any one of to <11>.
<13> The ratio of the total seal pattern area of the plurality of first heat fusion portions to the total area of the folded three-dimensional guard forming sheet is 2% or more, or 5% or more, and 15%. The disposable diaper according to <11> or <12>, which is 10% or less, 2% or more and 15% or less, or 5% or more and 10% or less.
<14> The disposable diaper according to any one of <1> to <13>, wherein the three-layer structure portion of the folded three-dimensional guard forming sheet is joined by a second heat fusion part.
<15> The disposable diaper according to <14>, wherein the second heat-sealed portion is disposed across the two-layer structure portion and the three-layer structure portion of the folded three-dimensional guard forming sheet. .
<16> The disposable diaper according to <14> or <15>, wherein the second heat-sealing portion has a linear shape.
<17> The disposable diaper according to any one of <14> to <16>, wherein the second heat fusion part intersects with a longitudinal direction of the disposable diaper.
<18> The angle α formed between the second heat-sealed portion and the edge of the outer end of the three-dimensional guard forming sheet is greater than 0 °, 20 ° or more, or 30 ° or more, The disposable diaper according to <17>, which is 70 ° or less, 60 ° or less, 20 ° or more and 70 ° or less, or 30 ° or more and 60 ° or less.
<19> The disposable diaper according to the above <16>, wherein the second heat-sealed portion has a single linear shape extending in the longitudinal direction in a zigzag (sawtooth) shape or a wave shape.
<20> The seal pattern area of one second heat fusion part is 1.5 mm ² or more, 3 mm ² or more, 20 mm ² or less, 10 mm ² or less, or 1. 5 mm ² or more 20 mm ² or less or a disposable diaper according to any one of the at 3 mm ² or more 10 mm ² or less <14> - <19>.
<21> The ratio of the total area of the second heat fusion part to the total area of the folded three-dimensional guard forming sheet is 1% or more, or 3% or more, or 10% or less, The disposable diaper according to <20>, which is 8% or less, or 1% or more and 10% or less, or 3% or more and 8% or less.
<22> The disposable according to any one of <14> to <21>, wherein a seal pattern area of one second heat fusion part is larger than a seal pattern area of one first heat fusion part. Diapers.

<23> The three-dimensional guard forming sheet is fixed to the sheet constituting the side panel via a surface-side adhesive layer,
The disposable diaper according to <1>, wherein the three-layer structure portion is disposed on the surface-side adhesive layer.
<24> The disposable diaper according to <23>, wherein only the three-layer structure portion is disposed on the surface-side adhesive layer.
<25> The disposable diaper according to <23>, wherein the three-layer structure portion and the two-layer structure portion are arranged on the surface-side adhesive layer.
<26> The disposable diaper according to <23>, wherein only the two-layer structure portion is arranged on the surface-side adhesive layer.
<27> The absorptive main body has an abdominal part located on the wearer's ventral side when worn, a dorsal part located on the dorsal side of the wearer, and a crotch part located on the crotch part,
The <1> to <26>, wherein the side panel is attached to both sides of the absorbent main body on the back side so as to protrude outward from both side edges of the absorbent main body. The disposable diaper according to 1.
<28> The disposable diaper according to any one of <1> to <27>, wherein the side panel is fixed to the absorbent main body and the three-dimensional guard forming sheet via an adhesive layer.
<29> The side panel includes two sheets made of nonwoven fabric, and a plurality of elastic members fixed between the two sheets in a state of extending in the disposable diaper width direction. The disposable diaper according to any one of <1> to <28>.
<30> Of the two sheets constituting the side panel, a sheet located on the outer surface side of the side panel is folded back to the outer surface side of the sheet at the base end portion of the side panel, The disposable diaper according to any one of <1> to <29>, wherein the folded portion is joined to the outer surface of the sheet via a reinforcing adhesive layer.

<31> The absorbent main body has an abdominal side portion located on the wearer's ventral side when worn, a back side portion located on the wearer's back side, and a crotch portion located on the crotch portion, and the three-dimensional guard The forming sheet has an elastic member for forming a three-dimensional guard along the edge in the vicinity of the edge on the inner side in the width direction of the absorbent main body, and when worn, due to the contraction force of the elastic member, The disposable diaper according to any one of <1> to <30>, wherein a portion of the crotch portion having a predetermined width from the end edge is separated from the top sheet to form a three-dimensional guard.
<32> The three-dimensional guard forming sheet is fixed to the sheet constituting the side panel via a surface-side adhesive layer on both side portions in the longitudinal direction of the absorbent main body, and is attached to the surface sheet. The disposable diaper according to any one of <1> to <31>, which is fixed through an adhesive layer.
<33> The disposable diaper according to <3>, wherein the surface-side adhesive layer is formed over substantially the entire length of the absorbent main body.
<34> The ratio of the area of the three-layer structure portion to the total area of the folded three-dimensional guard forming sheet is 3% or more, 5% or more, 25% or less, or 15%. The disposable diaper according to any one of <1> to <33>, which is at least 3% to 25%, or 5% to 15%.
<35> The width W1 of the three-layer structure portion is 2 mm or more, 5 mm or more, 20 mm or less, 15 mm or less, 2 mm or more, 20 mm or less, or 5 mm or more, 15 mm or less. The disposable diaper according to any one of <1> to <34>.
<36> The disposable diaper according to the above <3>, wherein a folded inner end portion on the side panel side of the three-dimensional guard forming sheet and the side panel are fixed by the surface-side adhesive layer. .
<37> The disposable diaper includes a main body side adhesive layer, a reinforcing adhesive layer, a connection adhesive layer, and an outer layer adhesive layer. The main body side adhesive layer, the reinforcing adhesive layer, and the connection Any one of the above <1> to <36>, in which the adhesive layer for use and the outer layer adhesive layer are overlapped so as not to cause a gap therebetween and are substantially continuous in the width direction of the disposable diaper The disposable diaper described.
<38> The disposable diaper includes a tip side adhesive layer, a second reinforcing adhesive layer, and a second connection adhesive layer, the tip side adhesive layer, the second reinforcing adhesive layer, and the Disposable according to any one of <1> to <37>, wherein the second connecting adhesive layer is overlapped so as not to cause a gap therebetween and is substantially continuous in the width direction of the disposable diaper. Diapers.

1A, 1B, 1C, 1D Disposable diaper 2 Absorbent body 21 Surface sheet 22 Outer layer composite sheet 22a Leakproof sheet 22b Outer layer nonwoven fabric 23 Absorber 24 Three-dimensional guard forming sheet 24a Two layer structure part 24b Three layer structure part 24O Outer end Part 24O1 Edge of outer end part 24I Inner end part 24I1 Edge of inner end part 25 Elastic member for forming three-dimensional guard 26 Elastic member for forming leg gathers 27 First heat fusion part 28 Second heat fusion part 28O Outer second heat fusion part 28I Inner second heat fusion part 3 Side panel 3a End part of side panel 3b Base end part of the side panel (end part on the absorbent main body side)
30 Intermediate region 31, 32 Sheet 33 Elastic member 35 Main body side adhesive layer 36 Front end side adhesive layer 37 Intermediate adhesive layer 38 Non-adhesive region 4 Fastening tape 41 Fastening portion 42 Tape substrate 5 Landing zone 61 Outer layer adhesive layer 62 adhesive layer for connection 63 adhesive layer for reinforcement 64 second adhesive layer for reinforcement 65 second adhesive layer for connection 66 surface side adhesive layer 67, 68 adhesive layer

Claims (12)

An absorbent body including an absorbent body, a surface sheet disposed on the inner surface side of the absorbent body, and an outer layer composite sheet disposed on the outer surface side of the absorbent body, and one or both sides in the longitudinal direction of the absorbent body Disposable diapers with stretchable side panels attached to
The side panel is provided with a fastening tape at the tip,
The absorbent main body has a three-dimensional guard forming sheet disposed on both sides in the longitudinal direction of the absorbent main body,
The three-dimensional guard forming sheet has a two-layer structure portion and a three-layer structure portion formed by folding both sides of one sheet so as to overlap each other, and the two-layer structure portion and the three-layer structure portion. Are disposable diapers in which the layers are bonded to each other, and are fixed to the sheet constituting the side panel on both longitudinal sides of the absorbent main body.   The disposable diaper according to claim 1, wherein the bonding between the layers is performed by heat fusion.   The disposable diaper according to claim 1 or 2, wherein the three-dimensional guard forming sheet is fixed to a sheet constituting the side panel via a surface-side adhesive layer.   The three-layer structure portion includes an outer end on the side panel side and an inner end on the absorbent main body side of one sheet of the three-dimensional guard forming sheet, respectively, on the outer surface side of the three-dimensional guard forming sheet. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is formed by being folded back.   The disposable diaper according to any one of claims 1 to 4, wherein the three-layer structure portion is formed by covering the outer end portion folded back with the folded inner end portion.   The disposable diaper according to claim 2, wherein the two-layer structure part of the folded three-dimensional guard forming sheet is joined by a first heat-sealing part.   The disposable diaper according to claim 2, wherein the two-layer structure portion and the three-layer structure portion of the folded three-dimensional guard forming sheet are joined together by a first heat-sealing portion.   The disposable diaper according to claim 6 or 7, wherein the three-layer structure part of the folded three-dimensional guard forming sheet is joined by a second heat fusion part.   The disposable diaper according to claim 8, wherein the second heat-sealing portion is disposed across the two-layer structure portion and the three-layer structure portion of the folded three-dimensional guard forming sheet.   The disposable diaper according to claim 8 or 9, wherein the second heat fusion part has a linear shape.   The disposable diaper according to claim 10, wherein the second heat fusion part intersects with a longitudinal direction of the disposable diaper.   The disposable diaper according to any one of claims 8 to 11, wherein a seal pattern area of one second heat fusion part is larger than a seal pattern area of one first heat fusion part.

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