TW201420091A - Disposable diaper - Google Patents

Abstract

This diaper (1A) is provided with: an absorbent main body (2) including an absorbent (23), a surface sheet (21), and an outer-layer composite sheet (22); and an elastic side panel (3) attached to a lateral part of the absorbent main body (2). A fastening tape (4) is provided to a distal end part (3a) of the side panel (3). The absorbent main body (2) has a three-dimensional-guard forming sheet (24) at both lateral parts thereof. The three-dimensional-guard forming sheet (24) has a two-layer-structure portion (24a) and a three-layer-structure portion (24b) in which both lateral parts of a single sheet are folded back and layered over each other, and the layers are bonded together. The three-dimensional-guard forming sheet (24) is fixed at both lateral parts of the absorbent main body (2) to a sheet (31) constituting the side panel (3).

Description

Disposable diaper

This invention relates to an unfolded disposable diaper.

Heretofore, there has been known an unfolded disposable diaper which is attached to a portion of the absorbent body including the absorbent body which is disposed on the back side of the wearer when worn, and which is stretched and contracted in the width direction of the absorbent body. The side piece of the sex is formed (refer to Patent Document 1).

Such a disposable diaper can be manufactured by manufacturing a side sheet by a step different from the absorbent body and attaching it to the absorbent body, thereby suppressing the amount of material used for the side sheet or the waste generated from the material. It is superior in terms of environment or cost.

However, conversely, when the diaper is worn by stretching the adhesive tape or the like provided at the front end portion of the side panel, the joint portion of the side panel and the absorbent body or the vicinity thereof, or the joint portion of the side panel and the fastening tape or Nearby, it is prone to breakage or cracking.

In order to eliminate such a problem, in Patent Document 1, it is proposed to fold a portion of the side panel overlapping the absorbent body or the fastening tape to form a reinforcing nonwoven fabric layer, and to bond the reinforcing nonwoven fabric layer to the absorbent body. Or a Velcro strap.

Prior technical literature Patent literature

Patent Document 1: WO2008149762 (A1)

However, even if a reinforced non-woven fabric layer is formed as in the diaper described in Patent Document 1, When the diaper is worn, the force concentrates on the interface between the absorbent body and the side portions of the side panels, and the side panels are also prone to breakage or cracking.

The present invention relates to a disposable diaper comprising: an absorbent body comprising an absorbent body, a surface sheet disposed on an inner surface side of the absorbent body, and an outer layer composite sheet disposed on an outer surface side of the absorbent body; a stretchable side panel attached to one or both sides of the longitudinal direction of the absorbent body; and the side panel is provided with a fastening tape at the front end portion, and the absorbent body has a disposition body disposed on the absorbent body A sheet for forming a three-dimensional protective layer on both sides of the longitudinal direction, wherein the sheet for forming a three-dimensional protective sheet has a two-layer structure portion and a three-layer structure portion in which both side portions of one sheet are folded and overlapped with each other. The two-layer structure portion and the three-layer structure portion are bonded to each other, and are fixed to the sheets constituting the side sheets on both side portions in the longitudinal direction of the absorbent body.

According to the present invention, it is possible to provide a disposable diaper which is less likely to be broken or broken at the joint portion of the side panel and the absorbent body or in the side panel when the diaper is worn, and which has a feeling of use.

1A, 1B, 1C, 1D‧‧‧ disposable diapers

1E‧‧‧diapers

2‧‧‧Absorbable ontology

3‧‧‧ side film

3'‧‧‧Flexible sheet

3a‧‧‧ front end of side panels

3b‧‧‧The base end of the side panel (end of the absorbent body side)

3u, 3d‧‧‧ upper and lower edges

4‧‧‧Buckle tape

5‧‧‧ buckle area

7‧‧‧Manufacture of equipment

21‧‧‧Surface sheet

22‧‧‧Outer composite sheet

22a‧‧‧Leak-proof sheet

22b‧‧‧Outer non-woven fabric

23‧‧‧Acceptor

24‧‧‧Three-dimensional protective forming sheet

24a‧‧2 layer structure

24b‧‧‧3 structural part

24I‧‧‧Inside end

24I1‧‧‧ the edge of the inner end

24O‧‧‧Outer end

24O1‧‧‧The edge of the outer end

25‧‧‧Elastic members for forming three-dimensional protection

26‧‧‧Elastic members for the formation of leg folds

27‧‧‧1st heat fusion joint

28‧‧‧2nd thermal fusion joint

28I‧‧‧2nd inner thermal fusion joint

28O‧‧‧2nd outer heat fusion joint

30‧‧‧Intermediate area

31, 32‧‧‧ sheets

31', 32'‧‧‧ ribbon sheet

33‧‧‧Flexible components

35‧‧‧ Body side adhesive layer

35a‧‧‧End

36‧‧‧ front-end side adhesive layer

36b‧‧‧End

37‧‧‧Intermediate adhesive layer

38‧‧‧ Non-continuous area

41‧‧‧ Fixture

42‧‧‧With substrate

61‧‧‧ outer layer of adhesive

61a‧‧‧End

62‧‧‧Connecting adhesive layer

62a‧‧‧End

63‧‧‧Reinforcing adhesive layer

63', 64'‧‧‧ adhesive

63a‧‧‧End

64‧‧‧2nd reinforcing adhesive layer

64b‧‧‧End

65‧‧‧2nd bonding adhesive layer

65b‧‧‧End

66‧‧‧Surface side adhesive layer

67, 68‧‧‧ adhesive layer

71‧‧‧Long-side structures

72‧‧‧elastic winding mechanism

73‧‧‧Integrated institutions

74‧‧‧ nip rollers

75‧‧‧Binder coating machine

76‧‧‧Adhesive Coating Machine

77‧‧‧cutting mechanism

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧胯下下

CL‧‧‧Central Line

P1‧‧‧ overlapping parts

P2‧‧‧ overlapping parts

P3‧‧‧ overlapping parts

P4‧‧‧ overlapping parts

P5‧‧‧ overlapping parts

R‧‧ Direction

W1‧‧‧Width

X‧‧‧Width direction

Y‧‧‧Longside direction

‧‧‧‧角

‧‧‧‧角

Γ‧‧‧ corner

Δ‧‧‧ corner

Fig. 1 is a developed plan view of a disposable diaper according to a first embodiment of the present invention as seen from the surface sheet side.

Fig. 2 is a perspective view showing the 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 its vicinity.

Figure 4 is a cross-sectional view taken along line I-I of Figure 3.

Fig. 5 is an enlarged plan view showing a side panel of the disposable diaper according to the second embodiment of the present invention and its vicinity (corresponding to Fig. 4).

Fig. 6 is a sectional view taken along line II-II of Fig. 5 (corresponding to Fig. 5).

Fig. 7 is an enlarged plan view showing a side panel of the disposable diaper according to the third embodiment of the present invention and its vicinity (corresponding to Fig. 4).

Fig. 8 is a sectional view taken along line III-III of Fig. 7 (corresponding to Fig. 5).

Fig. 9 is an enlarged plan view showing a side panel of the disposable diaper according to the fourth embodiment of the present invention and its vicinity (corresponding to Fig. 4).

Fig. 10 is a sectional view taken along line IV-IV of Fig. 9 (corresponding to Fig. 5).

Fig. 11 is a perspective view showing an example of a method of manufacturing a side panel in the disposable diaper according to the first to fourth embodiments.

Fig. 12 is an enlarged plan view showing a side panel of the disposable diaper according to another embodiment of the present invention and its vicinity (corresponding to Fig. 4).

The present invention relates to a disposable diaper in a disposable diaper having a stretchable side panel disposed on a back side of the absorbent body, at or near the joint of the side panel and the absorbent body, or The side panels are less prone to breakage or cracking.

Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments thereof.

As shown in FIG. 1, the disposable diaper 1A (hereinafter also referred to as diaper 1A) according to the first embodiment of the present invention includes an absorbent body 2 including an absorber 23 and disposed on the inner surface side of the absorber 23. The surface sheet 21 and the outer layer composite sheet 22 disposed on the outer surface side of the absorber 23; the stretchable side sheets 3 and 3 are attached to both sides of the longitudinal direction of the absorbent body 2 .

The absorbent body 2 is formed in the diaper 1A as shown in FIG. 1 and has a vertically long shape, and has a ventral side portion A on the ventral side of the wearer when worn, a back side portion B on the back side of the wearer, And located in the lower part of the coffin. As shown in Fig. 1, the absorbent body 2 has a rectangular shape in a state of being spread into a flat shape. The side panels 3 and 3 are attached to both sides of the absorbent body 2 in the back side portion B so as to protrude outward from the opposite side edges of the absorbent body 2, respectively. unit. The side panels 3 and 3 are fixed to the absorbent body 2 and the sheet for forming a stereoscopic protective sheet 24 described below via an adhesive layer in the disposable diaper 1A.

The longitudinal direction of the disposable diaper 1A is in the Y direction in the drawing, and is the same as the longitudinal direction of the absorbent body. The X direction of the width direction of the disposable diaper 1A is the same as the width direction of the absorbent body 2. In the following description, the direction corresponding to the longitudinal direction of the diaper or the longitudinal direction of the diaper of the diaper is also referred to as the Y direction, and the width direction of the diaper or the diaper width direction of the constituent members of the diaper. The corresponding direction is simply referred to as the X direction. Further, the inner surface of the constituent member of the diaper or the diaper is the surface facing the wearer's skin side when worn, and the outer surface of the diaper or the diaper constituent member is the surface opposite to the wearer's skin when worn.

As shown in FIGS. 1 and 4, the absorbent body 2 includes a liquid-permeable surface sheet 21, an outer layer composite sheet 22, and a liquid-retaining absorbent body interposed between the two sheets 21 and 22. twenty three. The outer layer composite sheet 22 includes a liquid-impermeable or liquid-impermeable (including water repellency) leakage preventing sheet 22a, and is bonded to the outer surface side of the leakage preventing sheet 22a via the outer layer of the adhesive layer 61 (FIG. 4). The middle Q side) is not woven 22b. The outer layer non-woven fabric 22b has the same shape as that of the absorbent main body 2, and the leakage preventing sheet 22a has the same plan view shape as the outer layer non-woven fabric 22b except that the width in the X direction is slightly smaller as shown in Fig. 4 . The skin on the outer surface of the diaper feels good by the presence of the outer layer nonwoven fabric 22b.

As shown in FIG. 1, the diaper 1A is formed to be bilaterally symmetrical with respect to the longitudinal center line CL of the absorbent main body 2. Therefore, the configuration of the side sheets 3 and 3, the laminated state of the sheet for forming the three-dimensional protective sheet, and the joint state with the absorbent body 2 are mainly described by taking the left side of Fig. 1 as an example, and The same is true for left and right symmetry.

The side panel 3 is provided with a fastening tape 4 at the front end portion 3a. In the diaper 1A, as shown in FIGS. 3 and 4, two sheets 31 and 32 are attached and fixed between the two sheets 31 and 32. Elastic member 33. The side panel 3 in the diaper 1A has a rectangular shape in a state of being spread flat as shown in Fig. 3 . Moreover, as shown in FIG. 4, the side panel 3 has two sheets 31 and 32 which are manufactured by non-woven fabric, And a plurality of elastic members 33 fixed between the two sheets 31 and 32 in a state of being elongated in the diaper width direction (X direction). The fastening tape 4 provided at the front end portion 3a of the side panel 3 is used to fix the side panel 3 to other portions. The elastic members 33 are disposed in the width direction (X direction) of the diaper 1A, respectively. Further, the plurality of elastic members 33 in the side panels 3 are disposed at substantially equal intervals in the longitudinal direction (Y direction) of the diaper.

The absorbent body 2 has sheets 24 and 24 for forming three-dimensional protective sheets disposed on both side portions of the longitudinal direction of the absorbent body 2. The sheet for forming a three-dimensional protective sheet is disposed on the side of the longitudinal direction of the absorbent body 2 over the entire length of the absorbent body 2 . The three-dimensional protective forming sheet 24 has a three-dimensional protective forming elastic member 25 along the end edge in the vicinity of the inner edge in the width direction (X direction) of the absorbent body 2, and is contracted by the elastic member 25 when worn. The force causes the portion of the crotch portion C that has a certain width from the end edge to leave the surface sheet 21 to form a three-dimensional shield. Further, the leg gathers forming elastic member 26 is disposed in a portion of the absorbent body 2 that is disposed around the leg portion on both sides in the longitudinal direction.

The sheet for forming a three-dimensional protective sheet has a two-layer structure portion 24a and a three-layer structure portion 24b which are formed by folding both side portions of one sheet and overlapping each other, and the two-layer structure portion 24a and the three-layer structure portion 24b are The layers are joined separately. As described above, the sheet for forming a three-dimensional protective sheet has two layers of structural portions 24a which are folded and overlapped on both sides of one sheet, and which are joined by heat welding between the two layers, and the three layers are thermally welded. The three-layer construction portion 24b is joined. Specifically, as shown in FIG. 3 and FIG. 4, the three-layer structure portion 24b of the diaper 1A has the outer side end portion 24 of the side sheet 3 side of the sheet for forming the three-dimensional protective sheet (the center line CL in the longitudinal direction is The inner end portion 24I on the side opposite to the side of the absorbent body 2 (the center line CL side in the longitudinal direction) is formed by folding the outer surface side (the Q side in FIG. 4) of the sheet for forming the three-dimensional protective sheet. Further, 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 heat welding. Therefore, the folded sheet three-dimensional protective forming sheet 24 is formed in a ring shape (ring shape).

In the diaper 1A, the layers between the layers of the folded-out three-dimensional protective forming sheet 24, that is, the two-layered structural portion 24a and the three-layered structural portion 24b are as shown in Fig. 3, and are arranged in a scatter shape. The plurality of first heat-fusible portions 27 are joined, and the folded-out three-dimensional protective sheet 24 is formed in a sheet shape. Further, the above-described three-dimensional protective forming elastic member 25 is disposed inside the folded three-dimensional protective forming sheet 24. The shape of the first heat-welding portion 27 is not particularly limited, and may be any shape such as a circle, an ellipse, a rhombus, a triangle, or a polygon. The sealing pattern area of the one first heat-fusible portion 27 is preferably 0.5 mm ² or more, and more preferably 1.5 mm ² or more, from the viewpoint of preventing the swell between the layers and not damaging the wearing feeling. 10 mm ² or less is further preferably 5 mm ² or less, and more specifically, preferably 0.5 mm ² or more and 10 mm ² or less, and more preferably 1.5 mm ² or more and 5 mm ² or less. The ratio of the total seal pattern area of the plurality of first heat-fusible portions 27 to the total area of the folded-out three-dimensional protective sheet 24 is preferably 2% or more from the viewpoint of ensuring the strength and ensuring the softness of the product. More preferably, it is 5% or more, further preferably 15% or less, more preferably 10% or less, and more specifically, preferably 2% or more and 15% or less, more preferably 5% or more and 10% or less. . It is preferable that the first heat-sealed portion 27 is disposed in the vicinity of the three-dimensional protective-forming elastic member 25 of the three-dimensional protective-forming sheet 24 or the portion in which the leg-pleat-forming elastic member 26 is disposed in the crotch portion C or the like. Set up with elastic members.

The first heat-welding portion 27 can be formed using, for example, a heat seal, an ultrasonic seal, a high-frequency seal, or a combination of two or more of these. The pattern of the first heat-sealed portion 27 of the diaper 1A is a dot pattern arranged in a scatter pattern, but the shape is not limited thereto. For example, a linear heat-sealed portion may be formed along the longitudinal direction of the diaper 1A. Or a linear pattern or a lattice pattern formed by a plurality of roots. Further, two or more types of sealing patterns may be used in combination.

The three-layer structure portion 24b in the layer between the sheets 24 for forming the three-dimensional protection forming of the folding is further joined to each other by the second heat-welding portion 28. The second heat-welding portion 28 has a linear shape and intersects with the longitudinal direction (Y direction) of the diaper 1A. Specifically, as shown in FIG. 3, in the diaper 1A, on the edge 24O1 of the outer end portion 24O of the fold, a plurality of inner sides are 2 The heat-welding portions 28I are arranged at substantially equal intervals in the longitudinal direction (Y direction), and the plurality of outer second heat-fusible portions 28O are in the longitudinal direction at the edge 24I1 of the inner end portion 24I (Y) The directions are arranged at substantially equal intervals. Each of the inner second heat-welded portions 28I has a linear shape and intersects with the edge 24O1 of the outer-side end portion 24O extending in the longitudinal direction (Y direction), and spans the two-layer structure portion 24a and the three-layer structure portion 24b. Configuration. Further, each of the outer second heat-fusible portions 28O has a linear shape, and intersects the edge 24I1 of the inner end portion 24I extending in the longitudinal direction (Y direction), and spans the two-layer structure portion 24a and the three-layer structure. Part 24b is configured. As shown in FIG. 3, in the diaper 1A, each inner second heat-welding part 28I and each outer-side second heat-welding part 28O are mutually staggered in the longitudinal direction (Y direction). From the viewpoint of dispersing the heat-welded portion between the layers of the sheet for forming a three-dimensional protective sheet by stretching in the X direction, and dispersing the force with respect to the stretching direction, each of the inner second heat-fusible portions 28I and the outer side The angle α formed by the edge 24O1 of the end portion 24O is preferably more than 0°, more preferably 20° or more, and particularly preferably 30° or more. Further, it is preferably 70 or less, and more preferably 60 or less. 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 between the outer second heat-fusible portion 28O and the edge 24I1 of the inner end portion 24I is preferably greater than 0°, more preferably 20° or more, and particularly preferably 30° or more. . Further, it is preferably 70 or less, and more preferably 60 or less. 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 seal portion 27 is joined to 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-fusible portion 28 is mainly joined to the three-layer structure portion 24b, and the second-side heat-sealed portion 28O and the inner second heat-welded portion 28I may be joined to each other as shown in Fig. 3, and the three-layer structure portion 24b may be joined. It is disposed across the two-layer structural portion 24a and the three-layer structural portion 24b.

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

In the diaper 1A, the second heat-fusible portion 28 is formed of two types of welded portions of the inner second heat-fusible portion 28I and the outer second heat-welded portion 28O, but may be welded by only one type. Formed. When the plurality of types of the welded portions are substantially equal to each other in the longitudinal direction (Y direction), the heat-sealed portions of the three-layer structure portion are secured, and the sheet for forming a three-dimensional protective sheet is prevented. From the viewpoint of the peeling between the layers, the sealing pattern area of one of the welded portions is preferably 1.5 mm ² or more, more preferably 3 mm ² or more, further preferably 20 mm ² or less, and further preferably 10 mm ^{2 .} Hereinafter, more specifically, it is preferably 1.5 mm ² or more and 20 mm ² or less, and more preferably 3 mm ² or more and 10 mm ² or less. The ratio of the total area of the seal pattern area of each of the plurality of welded portions to the total area of the folded sheet of the three-dimensional protective sheet is preferably 1% from the viewpoint of ensuring the strength and the wearing feeling. The above is more preferably 3% or more, further preferably 10% or less, further preferably 8% or less, and more specifically, preferably 1% or more and 10% or less, and more preferably 3% or more. And 8% or less. From the viewpoint of ensuring strong heat fusion of the three-layer portion, the distance between the adjacent ones of the welded portions in the longitudinal direction (Y direction) is preferably 0.5 mm or more, and more preferably 5 mm or less. Further, it is preferably 3 mm or less, and more specifically, preferably 0.5 mm or more and 3 mm or less.

As shown in Fig. 4, the sheet for forming a three-dimensional protective sheet is fixed to the sheet 31 constituting the side sheet 3 at both side portions in the longitudinal direction of the absorbent body 2, and in the diaper 1A, via the surface side adhesive layer. 66 is fixed to the sheet 31, and is fixed to the surface sheet 21 via the adhesive layer 67, and is fixed to the outer side in the width direction (X direction) from the side edge of the surface sheet via the adhesive layer 62 for connection. The outer layer composite sheet 22. Moreover, the sheet for forming the three-dimensional protective sheet of the diaper 1A is attached to the surface sheet 21 via the 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 (the side in the longitudinal direction on the center line CL side) of the adhesive layer 67 in the width direction (X direction), and is provided on the front side portion A and the back side portion B, On the other hand, it is not provided in the lower part C. The adhesive layer 67, the adhesive layer for connection 62, and the surface-side adhesive layer 66 other than the adhesive layer 68 are formed over substantially the entire length of the absorbent body 2.

In the diaper 1A, as shown in FIG. 4, only the three-layer structure portion 24b 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 coincides with the position of the surface-side adhesive layer 66. Further, the width of the three-layer structure portion 24b coincides with the width of the surface-side adhesive layer 66. The ratio of the area of the three-layer structure portion 24b to the total area of the folded-out three-dimensional protective sheet 24 is preferably 3% or more from the viewpoint of the strength and the wearing feeling of the three-layer structure portion, and is preferably further preferably 3% or more. It is 5% or more, more preferably 25% or less, further preferably 15% or less, and specifically, preferably 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, more preferably 20 mm or less, further preferably 15 mm or less, from the viewpoint of the same ratio as the above-mentioned area. In particular, it is preferably 2 mm or more and 20 mm or less, and more preferably 5 mm or more and 15 mm or less.

The side panel 3 in the diaper 1A has a main body side adhesive layer 35, a front end side adhesive layer 36, and a plurality of intermediate adhesive layers 37 as shown in FIG. The adhesive layers 35, 36, and 37 are all formed to extend in the longitudinal direction of the diaper (Y direction). Further, in the adhesive layers 35, 36, and 37, the plurality of elastic members 33 are fixed in an extended state between the two sheets 31 and 32 via an adhesive constituting each of the adhesive layers, and are not deposited. The two sheets 31 and 32 of the portion having the elastic member 33 are directly joined to each other via an adhesive constituting each of the adhesive layers.

The main body side adhesive layer 35 is disposed on the side of the absorbent body 2 in the extending direction of the side panel 3, and fixes the end portion of each elastic member 33 on the side of the absorbent body 2 or its vicinity. The front end side adhesive layer 36 is provided on the side of the front end portion 3a in the extending direction of the side panel 3, and the end portion of the front side portion 3a side of the side panel 3 of each elastic member 33 is fixed or in the vicinity thereof. The intermediate adhesive layer 37 is provided with a plurality of intermediate regions 30 which are regions between the main body side adhesive layer 35 and the front end side adhesive layer 36 in the extending direction of the side sheets 3. The intermediate adhesive layer 37 has a width smaller than any of the above two adhesive layers 35, 36, and a plurality of layers are intermittently formed in the intermediate portion 30. In the extending direction of the side panel 3, between the body side adhesive layer 35 and the intermediate adhesive layer 37 adjacent thereto, the adjacent intermediate adhesive layer 37 and the front end side adhesive layer 36 and A non-adjacent region 38 in which an adhesive is not disposed is formed between the adjacent intermediate adhesive layers 37. In the diaper 1A of the present embodiment, the extending direction of the side sheets 3 coincides with the width direction of the diaper.

The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 each intersect a plurality of (more preferably three or more) elastic members 33 extending in the X direction along the longitudinal direction of the diaper (Y direction). extend. Preferably, the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37 each intersect with all of the elastic members 33 extending in the X direction and extend in the longitudinal direction of the diaper (Y direction), and further preferably It extends over the entire length between the lower edges 3u and 3d of the side panel 3.

Similarly, the non-adjacent region 38 intersects with a plurality of (more preferably three or more) elastic members 33 extending in the X direction and extends in the longitudinal direction of the diaper (Y direction). Preferably, the non-adjacent region 38 also intersects all of the elastic members 33 extending in the X direction and extends in the longitudinal direction of the diaper (Y direction), and more preferably extends over the entire length between the lower edges 3u, 3d of the side panels 3.

The side sheet 3 in the diaper 1A is as shown in Fig. 4, and the end portion 3b on the side of the absorbent main body 2 (hereinafter also referred to as the base end portion 3b) is a reinforcing adhesive layer which is partially overlapped with the main body side adhesive layer 35. 63 and strengthen. More specifically, as shown in FIG. 4, among the two sheets 31, 32 constituting the side panel 3, the sheet 32 on the outer surface side (Q side in FIG. 4) of the side panel 3 is attached to the side panel 3. The base end portion 3b is folded toward the outer surface side (Q side in FIG. 4) of the sheet 32, and the folded portion is joined to the outer surface of the sheet 32 via the reinforcing adhesive layer 63.

Since the base end portion 3b of the side panel 3 is reinforced by such a configuration, the rigidity is moderately high, and it is sufficient to have a sufficient tensile strength against the X-direction tensile force.

Further, regarding the direction in which the sheet constituting the side sheet is folded, the "inside surface side of the sheet" is the P side in the drawing (the side of the side sheet facing the skin side of the wearer), "the outer surface side of the sheet" The Q side of the figure (the side of the side piece opposite to the skin of the wearer).

Further, in the side panel 3, the base end portion 3b reinforced in this manner is joined to the outer layer composite sheet 22 by the adhesive layer 62 for connection. The bonding adhesive layer 62 shown in Fig. 4 joins the base end portion 3b of the side panel 3 with the leakage preventing sheet 22a, and the base end portion 3b of the side panel 3 and the edge of the self-leakage preventing sheet 22a. The outer layer non-woven fabric 22b and the leakage preventing sheet 22a are joined to the three-dimensional protective forming sheet 24 and/or the surface sheet 21. It is preferable that the base end portion 3b of the side panel is joined to the portion where the leakage preventing sheet 22a and the outer layer nonwoven fabric 22b are integrated with the outer layer adhesive layer 61.

Further, in the diaper 1A, as shown in Fig. 4, the other of the two sheets 31, 32 constituting the side panel 3 is located on the inner surface side (P side in Fig. 4) of the side panel 3 The end portion 3b is neither folded over the outer surface side of the sheet 31 nor folded toward the inner surface side.

As shown in FIG. 4, in the width direction (X direction) of the diaper 1A, the body side adhesive layer The 35 series is formed by separating the outer layer of the outer layer 61 from the outer layer. That is, the main body side adhesive layer 35 is formed on the outer side (the left side in FIG. 4) of the outer side in the diaper width direction of the outer layer of the adhesive layer 61, and the main body side adhesive layer 35 and the outer layer adhesive layer 61 do not have. The mutually overlapping portions are formed by being separated in the X direction.

On the other hand, in the diaper width direction (X direction), the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connection adhesive layer 62, and the outer layer of the adhesive layer 61 are formed so as not to have a gap in the diaper width direction. The manner in which the adhesive layer does not exist overlaps. In other words, the main body side adhesive layer 35 and the reinforcing adhesive layer 62 have portions P3 which overlap each other, and the reinforcing adhesive layer 63 and the bonding adhesive layer 62 also have a portion P2 which overlaps each other, and the adhesive layer 62 for connection and The outer layer of the adhesive layer 61 also has portions P1 that overlap each other. A sheet of material is interposed between the 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.

Moreover, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the connection adhesive layer 62, and the outer layer adhesive layer 61 are formed by shifting the center position in the width direction in the X direction. Further, the adhesive layers 35, 63, 62, and 61 are such that the end portions 35a, 63a, 62a, and 61a on the side of the front end portion 3a of the side panel 3 are directed from the outer side in the X direction (the left side in FIG. 4) toward the inner side ( The right side of Figure 4 is arranged in a sequential manner.

Preferably, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the bonding adhesive layer 62, and the outer layer of the adhesive layer 61 are in the above-described manner (especially in the state shown in FIG. 4) throughout the fastening tape 4. It extends in the Y direction over the entire length, and more preferably extends in the same manner throughout the entire length of the side sheet 3 in the Y direction.

Moreover, as shown in FIG. 4, the side panel 3 in the diaper 1A is also reinforced by the 2nd reinforcing adhesive layer 64 which overlaps with the front-end side adhesive layer 36 in the front-end part 3a. More specifically, as shown in FIG. 4, among the two sheets 31, 32 constituting the side panel 3, the sheet 32 on the outer surface side (Q side in FIG. 4) of the side panel 3 is attached to the side panel 3. The front end portion 3a is folded toward the outer surface side (Q side in FIG. 4) of the sheet 32, and the folded portion is passed through the second reinforcing adhesive layer 64. Bonded to the outer surface of the sheet 32.

Since the front end portion 3a of the side panel 3 is reinforced by such a configuration, the rigidity is appropriately high, and the strength is insufficient to be easily broken by the tensile force with respect to the X direction.

Further, in the side panel 3, the front end portion 3a is joined to the fastening tape 4 by the second connecting adhesive layer 65 in such a manner that the front end portion 3a is reinforced.

The fastening tape 4 includes a tape base material 42 and a male member that is joined to the tape base material 42 to form a mechanical surface fastener of the fixing portion 41. Further, only the portion of the fastening tape 4 composed of the tape base material 42 is joined to the front end portion 3a of the side panel 3 to be joined. In the present embodiment, the front end portion 3a of the side panel 3 and the tape base material 42 are joined via the second connection adhesive layer 65. As a method of fixing the male member of the mechanical surface fastener to the tape base material 42, any joining method such as heat welding or adhesion using an adhesive is used.

Further, on the outer surface of the abdominal portion A of the diaper 1A, a fastening tape 4 is provided, and more specifically, a fastening region 5 for fixing the fixing portion 41 of the fastening tape 4 is provided.

Further, in the diaper 1A, as shown in Fig. 4, the other of the two sheets 31, 32 constituting the side panel 3 is located on the inner surface side (P side in Fig. 4) of the side panel 3 The front end portion 3a is neither folded over the outer surface side of the sheet member 31 nor folded toward the inner surface side.

As shown in Fig. 4, in the width direction (X direction) of the diaper 1A, the distal end side adhesive layer 36 is formed to be separated from the second connection adhesive layer 65 inward. In other words, the distal end side adhesive layer 36 is formed on the inner side (the right side in FIG. 4) from the inner peripheral end portion 65b of the second connection adhesive layer 65 in the diaper width direction, and the distal end side adhesive layer 36 and the second connection are used. The subsequent agent layer 65 is formed by being separated from each other in the X direction without overlapping portions.

On the other hand, in the diaper width direction (X direction), the distal end side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connecting adhesive layer 65 do not cause a gap in the diaper width direction (following) The manner in which the layer of the agent does not exist) overlaps. In other words, the distal end side adhesive layer 36 and the second reinforcing adhesive layer 64 have portions P4 that overlap each other, and the second reinforcing adhesive layer 64 and the second connecting adhesive layer 65 also have portions P5 that overlap each other. Overlapping 2 A sheet of material is interposed between the layers of the adhesive, 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.

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. Further, the end portions 36b, 64b, and 65b on the proximal end portion 3b side of the side sheets 3 in the both end portions of the respective adhesive layers 36, 64, and 65 in the X direction are formed from the inner side in the X direction (Fig. The right side of 4 is arranged in the order of the outer side (the left side in FIG. 4).

It is preferable that the distal end side adhesive layer 36 and the second reinforcing adhesive layer 64 extend in the above-described aspect (especially in the state shown in FIG. 4) over the entire length of the fastening tape 4 in the Y direction, and more preferably It extends in the same manner throughout the entire length of the side piece 3 in the Y direction. Preferably, the second bonding adhesive layer 65 extends over 50% or more of the entire length of the fastening tape 4 in the Y direction, and is extended in the above-described manner (particularly, as shown in FIG. 4), and more preferably The same pattern extends over the entire length of the fastening strip 4 in the Y direction.

When the wearer wears the disposable diaper 1A of the first embodiment, the fixing portion 41 of the fastening tape 4 is pressed to the buckle while the side panel 3 is stretched by stretching the fastening tape 4 by hand. Area 5 is fixed.

According to the disposable diaper 1A of the first embodiment, as shown in FIG. 3 and FIG. 4, the sheet for forming a three-dimensional protective sheet has two layers of structural portions in which both side portions of one sheet are folded and overlapped with each other. The 24a and the three-layered structural portion 24b, and the two-layered structural portion 24a and the three-layered structural portion 24b are respectively joined to each other. Therefore, the tensile strength of the sheet for forming the three-dimensional protective sheet is easily increased, and when the diaper 1A is worn, even if the fastener tape 4 which is provided on the side sheet 3 to which the sheet for forming the three-dimensional protective sheet 24 is fixed is stretched, the side sheet 3 is stretched. The joint portion with the absorbent body 2 or its vicinity, or the side panel 3 is also less likely to be broken or broken, 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 (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded sheet for forming the three-dimensional protective sheet are formed by The plurality of first heat-welded portions 27 are joined to each other to form one sheet. Therefore, wearing In the case of the diaper 1A, even if the fastening tape 4 which is provided in the side panel 3 to which the sheet for forming the three-dimensional protective sheet 24 is stretched is stretched, the side panel 3 is less likely to be broken or broken, and the feeling of use is improved. In particular, in the diaper 1A, the folded outer end portion 24O is formed by covering the folded inner end portion 24I. In other words, the outer surface of the outer end portion 24O of the fold and the inner surface of the inner end portion 24I of the fold are joined by heat welding, and the sheet for forming the three-dimensional protective sheet 24 is formed in a ring shape (ring shape). When the diaper 1A is worn, even if the fastening tape 4 is stretched, the folded end portion 24O is less likely to be affected, and the side sheet 3 is less likely to be broken or broken, 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 three-layered structural portion 24b of the folded three-dimensional protective sheet 24 is divided into a plurality of first heat-sealed portions 27, The plurality of second heat-welded portions 28 are joined to each other to form a single sheet. Therefore, when the diaper 1A is worn, even if the fastening tape 4 is stretched, the side panel 3 is less likely to be broken or broken, and the feeling of use is improved. In particular, the second heat-fusible portion 28 of the diaper 1A includes two kinds of welded portions of the inner second heat-fusible portion 28I and the outer second heat-welded portion 28O, and the inner second heat-welded portion 28I and the outer second heat-welded portion 28Oh are Since it is disposed across the two-layer structure portion 24a and the three-layer structure portion 24b, it is formed into a stronger sheet shape. Therefore, when the diaper 1A is worn, even if the fastening tape 4 is stretched, the side panel 3 is less likely to be broken or broken, 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 sheet for forming a three-dimensional protective sheet 24 is fixed to the sheet 31 constituting the side sheet 3 via the front side adhesive layer 66. Further, the sheet for forming a three-dimensional protective layer is laminated so that both side portions of one sheet of the three-dimensional protective sheet 24 are folded and overlapped each other, and has a two-layer structure portion 24a and a three-layer structure portion 24b. As described above, since the sheet for forming the three-dimensional protective sheet 24 is formed in a ring shape, the joint portion of the side sheet 3 and the absorbent body 2 or the vicinity thereof or the side sheet 3 is less likely to be broken or broken, and the feeling of use is improved. Further, by forming the three-dimensional or three-layer structure for forming a sheet for three-dimensional protection, it is possible to further prevent leakage during use.

Further, as shown in FIGS. 3 and 4, for example, the three-layer structure portion 24b will be The outer end portion 24O (the side opposite to the longitudinal direction center line CL) of the sheet-like protective forming sheet 24 and the inner end portion 24I are respectively folded outward on the outer surface side (the Q side in FIG. 4), and will be folded over. When the outer end portion 24O is formed by being covered by the folded inner end portion 24I, the folded inner end portion 24I and the side panel 3 are fixed by the surface side adhesive layer 66, so that when the wearer wears it, even When the adhesive tape 4 is stretched by hand and the side panel 3 is stretched, the sheet 24 for forming a three-dimensional protective layer of the ring shape is not easily broken, and the feeling of use is improved.

For example, in the side panel 3 of the diaper 1A, for example, the base end portion 3b of the side panel 3 is reinforced by the folding of the sheet 32 and the reinforcing adhesive layer 63, and on the other hand, the body side adhesive layer 35 is When the outer layer of the outer layer 61 is separated in the X direction, it can be prevented from being bonded to the base end portion 3b of the side sheet 3 as compared with the case where all the layers from the sheet 31 to the outer layer non-woven fabric 22b are joined at the same position in the X direction. It becomes a part that becomes hard in the vicinity.

The adhesive layer separated in the X direction is the body side adhesive layer 35 and the outer layer adhesive layer 61 in the sense of enhancing the bonding strength of the side panel 3 and the outer layer composite sheet 22, or enhancing the appearance of the subsequent layer. The portion where the body-side adhesive layer 35 in the side sheet 3 is disposed is likely to become wrinkled by 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 in the X direction, the outer layer composite sheet 22 is bonded to the wrinkled surface of the side sheet 3, and the contact area is reduced, and the joint strength is lowered. Further, the pleats of the side panels 3 may also appear on the outer surface of the outer composite sheet due to the joining. However, in the diaper 1A, since the adhesive layer separated in the X direction is the body side adhesive layer 35 and the outer layer adhesive layer 61, such a problem can be avoided.

Moreover, by using a gas permeable sheet such as a nonwoven fabric as the sheets 31 and 32, it is possible to easily ensure good gas permeability in the vicinity of the joint portion between the side sheet 3 and the absorbent body 2.

In the diaper 1A, for example, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the bonding adhesive layer 62, and the outer layer of the adhesive layer 61 are superposed so as not to form a gap therebetween, and the adhesive is applied. When the layer is substantially continuous in the X direction, it can be ensured in the side panel 3 and the portion of the absorbent body 2 from the body side adhesive layer 35 to the outer layer of the adhesive layer 61. The tensile side panels 3 are also less susceptible to breakage.

Further, as in 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 end portion 3a before reinforcement is used by Since the second connecting adhesive layer 65 is bonded to the fastening tape 4, the strength of the fixing 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, when the distal end side adhesive layer 36 and the second connection adhesive layer 65 are separated in the X direction, and between the layers from the sheet 31 to the tape substrate 4 of the fastening tape 4 Compared with the case where the joint is made at the same position in the X direction, it is possible to prevent a portion which is hardened from being formed at or near the joint portion of the fastening tape 4 and the side panel 3. Moreover, by using a gas permeable sheet such as a nonwoven fabric as the sheets 31 and 32, it is also easy to ensure good gas permeability in the vicinity of the side sheet 3 and the front end portion 3a.

In the diaper 1A, for example, the distal end side adhesive layer 36, the second reinforcing adhesive layer 64, and the second connecting adhesive layer 65 are superposed so as not to form a gap therebetween, and the adhesive layer is When the X direction is substantially continuous, it is possible to ensure that the stretch adhesive tape 4 is not easily broken in the portions of the adhesive tape 4 and the side panel 3 from the second connection adhesive layer 65 to the front end side adhesive layer 36. Full strength.

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, it is difficult to apply the self-adhesive tape 4 to the entire area of the absorbent body 2. Breakage or breakage occurs.

Further, in the intermediate portion 30 of the disposable diaper 1A, the intermediate adhesive layer 37 is formed by providing a non-adjacent region 38 between adjacent adhesive layers, and in the natural state of the diaper 1A, by the elastic member 33 The two sheets 31 and 32 in the non-adjacent region 38 are respectively swelled away from the elastic member 33, and a plurality of wrinkles extending across the plurality of elastic members 33 are formed on both sides of the side panel 3 ( Not shown). Moreover, the wrinkles do not completely disappear under the wearing state of the diaper. Therefore, the harder portion of the side panel 3 than the adhesive layer 36-37, especially the portion hardened by the intermediate adhesive layer 37, is not easily worn. The skin of the person is not easy to cause discomfort.

The surface side adhesive layer 66, the adhesive layer 67, the main body side adhesive layer 35, the reinforcing adhesive layer 63, the bonding adhesive layer 62, the outer layer adhesive layer 61, the front end side adhesive layer 36, and the second reinforcing layer The adhesive layer 64, the second connecting adhesive layer 65, and the intermediate adhesive layer 37 can be coated by any known method by sandwiching either or both of the two sheets. After the agent, the two sheets were formed by combining and pressurizing.

Further, it is preferable that the coating pattern for forming the adhesive for each of the adhesive layers is a so-called full-surface coating using a spray gun, a coater gun or the like as an adhesive coater, but a bead gun may be used. A spiral spray gun, an Omega-shaped spray gun, a transfer roller, or the like is applied as a binder coater in a pattern such as a linear shape, a spiral shape, an Omega shape, or a dot shape.

The width (the dimension in the Y direction) or the diameter of the elastic member 33 disposed on the side panel 3 is preferably 0.1 mm or more, and preferably 2 mm or less, from the viewpoint of the flexibility of the side panel 3 or the securing of the stretchability. More preferably, it is 1 mm or less, and specifically, it is preferably 0.1 mm or more and 2 mm or less, more preferably 0.1 mm or more and 1 mm or less. Further, the number of the elastic members 33 disposed on the side sheets 3 is preferably 4 or more, more preferably 10 or more, more preferably 30 or less, still more preferably 20 or less, and specifically, preferably. It is about 4 or more and 30 or less, More preferably, it is 10 or more and 20 or less.

The width of the portion P3 in which the main body side adhesive layer 35 and the reinforcing adhesive layer 62 overlap each other is preferably 2 mm or more, and more preferably 4 mm or more, from the viewpoint of obtaining one or more of the above effects more reliably. Further, it is preferably 10 mm or less, and specifically preferably 2 mm or more and 10 mm or less, and particularly preferably 4 mm or more and 10 mm or less. The width of the portion P2 where the reinforcing adhesive layer 63 and the bonding adhesive layer 62 are overlapped is preferably 5 mm or more, more preferably 10 mm or more, further preferably 20 mm or less, and specifically, preferably 5 mm or more. 20 mm or less, particularly preferably 10 mm or more and 20 mm or less. The width of the portion P1 where the bonding adhesive layer 62 and the outer layer of the adhesive layer 61 overlap is preferably 5 mm or more, more preferably 10 mm or more, and further preferably 20 mm or less. In other words, it is preferably 5 mm or more and 20 mm or less, and particularly preferably 10 mm or more and 20 mm or less. Further, the separation distance between the main body side adhesive layer 35 and the outer layer of the adhesive layer 61 is preferably 0.5 mm or more, more preferably 5 mm or more, further preferably 10 mm or less, and specifically, preferably 0.5 mm or more. 10 mm or less, particularly preferably 5 mm or more and 10 mm or less. Further, the width of the reinforcing adhesive layer 63 is preferably 5 mm or more, more preferably 10 mm or more, further preferably 20 mm or less, and specifically, preferably 5 mm or more and 20 mm or less, and particularly preferably 10 mm or more. And 20mm or less.

From the same viewpoint, the width of the portion P4 where the distal end 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 further preferably 10 mm or less. It 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 in which 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, further preferably 15 mm or less, and specifically, preferably. It is 5 mm or more and 15 mm or less, preferably 10 mm or more and 15 mm or less. Further, the separation distance between the distal end side adhesive layer 36 and the second connection adhesive layer 65 is preferably 0.5 mm or more, more preferably 5 mm or more, further preferably 10 mm or less, and specifically, preferably 0.5. It is not more than mm and not more than 10 mm, and particularly preferably 5 mm or more and 10 mm or less. Further, the width of the second reinforcing adhesive layer 64 is preferably 5 mm or more, more preferably 10 mm or more, further preferably 20 mm or less, and specifically preferably 5 mm or more and 20 mm or less, and particularly preferably 10 mm or more and 20 mm or less.

The width 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 layer of the adhesive layer 61, and the front end side adhesive layer 36 and the second The separation distance of the bonding adhesive layer 65 is a size or a distance measured in the X direction.

The dimensions of the parts are such that the elastic members such as the elastic members 33 are elongated to spread the side panels or diapers into the design dimensions (in the state of being completely excluded from the influence of the elastic members). The measurement was performed in a state in which the dimensions were the same when the shape was flat.

Further, in the diaper 1A, as shown in FIG. 4, the sheet for forming the three-dimensional protective sheet 24 and the surface-side adhesive layer 66 of the sheet 31 constituting the inner surface side of the side sheet 3, and the body-side adhesive layer 35 are provided. They are also separated in the X direction. Thereby, the joining strength of the side panel 3 with respect to the absorbent body 2 is improved by the joining of the surface side adhesive layer 66, and the rigidity in the vicinity of the joint portion is also prevented from becoming excessively high. Moreover, the side panel 3 in the diaper 1A is also fixed to the main body side adhesive layer 35 and the front end side adhesive layer 36 in the state which the elastic member 33 extended.

The constituent materials of the diaper 1A will be described.

As the tape base material 42 constituting the sheets 31 and 32 of the side panel 3 and the tape base material 4 of the fastening tape 4, various sheet-like materials previously used for absorbent articles such as disposable diapers and menstrual napkins can be used without limitation.

For example, as the sheets 31 and 32 and the tape substrate 42, a non-woven fabric, a woven fabric, a film, or a laminated sheet or the like can be used.

As the surface sheet 21, the outer layer composite sheet 22, and the absorbent body 23 constituting the absorbent body 2, those previously used for absorbent articles such as disposable diapers and menstrual napkins can be used without limitation. For example, as the surface sheet 21, a hydrophilic and liquid permeable non-woven fabric, a three-dimensional apertured film, or the like can be used. As the outer layer composite sheet 22, the leakage preventing sheet 22a may be a resin film containing liquid impermeability or liquid impermeability (including water repellency), and the outer layer non-woven fabric 22b may be made of a non-woven fabric (for example, ventilated) obtained by various methods. (air through) non-woven fabric, spunbond non-woven fabric, spunlace non-woven fabric, needle punched non-woven fabric, etc.). The outer layer nonwoven fabric 22b may also be a multilayer structure. Further, as the absorber 23, an absorbent core in which a fiber assembly such as pulp fibers (which may be a nonwoven fabric) or a particle of a water-absorbent polymer is held to contain a water-permeable tissue or a non-woven fabric may be used. The chip material is covered and the like. As the sheet for forming the three-dimensional protective sheet constituting the three-dimensional protection, a film, a nonwoven fabric, a woven fabric, or a laminated sheet of these or the like can be used.

As the elastic member 33, the elastic member 25 constituting the three-dimensional shield, and the leg elastic member 26, natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutylene can be used. A linear or rope-like elastic member such as a diene copolymer or a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene. The plurality of elastic members 33 disposed on one side panel are preferably disposed in the same type at the same elongation, and are preferable from the viewpoints of manufacturing cost and simplification of the manufacturing steps.

Preferred materials for the adhesive for bonding the members, such as the adhesive 34 for fixing the elastic member 33, include amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), and ethylene. - Ethylene-acrylic acid ester copolymer (EEA), Styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-benzene Ethylene block copolymer (SIS, Styrene-isoprene-styrene block copolymer), styrene-ethylene/butylene-styrene block copolymer (SEBS, Styrene-ethylene/butylene-styrene block copolymer), styrene-ethylene/ A thermoplastic polymer such as a styrene-styrene block copolymer (SEPS, Styrene-ethylene/propylene-styrene block copolymer), and the like. The subsequent agent is preferably a hot melt type.

Next, the disposable diaper according to the second to fourth embodiments of the present invention will be described. In the disposable diapers 1B, 1C, and 1D of the second to fourth embodiments, the configuration of the sheet for forming a three-dimensional protective sheet, and the joint of the absorbent body 2 and the side sheet 3 with the sheet for forming a three-dimensional protective sheet are The diaper 1A of the first embodiment is different. The diapers 1B, 1C, and 1D of the second to fourth embodiments are mainly different from the diaper 1A of the first embodiment, and the same reference numerals will be given to the same points, and the description thereof will be omitted. The diaper 1A of the first embodiment will be described as appropriate for the aspects not specifically mentioned.

As shown in Fig. 5 and Fig. 6, the three-layer structure portion 24b of the diaper 1B is an outer side end portion 24 of the side sheet 3 side of the sheet for forming the three-dimensional protective sheet (opposite to the center line CL in the longitudinal direction). The inner end portion 24I on the side of the side of the absorbent body 2 (the side on the center line CL side in the longitudinal direction) is formed by folding outward on the outer surface side (the Q side in FIG. 6). Further, the three-layered structural 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 heat welding.

The layer (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded-out three-dimensional protective forming sheet 24 is the same as the diaper 1A, and is arranged in a scatter-like first heat-sealed manner as shown in Fig. 5 . The portion 27 is joined, and the folded sheet for forming the three-dimensional protective sheet is in the form of a sheet.

The three-layered structural portion 24b between the layers of the sheet for forming the three-dimensional protective sheet for folding, and further, as shown in Fig. 5, in the diaper 1B, on the edge 24O1 of the outer end portion 24 of the fold, a plurality of inner sides The second heat-welding portions 28I are arranged at substantially equal intervals in the longitudinal direction (Y direction), and the plurality of outer second heat-fusible portions 28O are along the longitudinal direction at the edge 24I1 of the inner end portion 24I (Y) The directions are arranged at substantially equal intervals. Each of the inner second heat seal portions 28I intersects with 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. Further, each of the outer second heat seal portions 28O intersects with 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 of the inner second heat-fusible portions 28I and the outer second heat-welded portions 28O are disposed at substantially equal positions in the longitudinal direction (Y direction). From the viewpoint of dispersing the heat-welded portion between the layers of the sheet for forming a three-dimensional protective sheet by stretching in the X direction, and dispersing the force in the stretching direction, the inner second heat-fusible portion 28I and the outer end The angle γ formed by the edge 24O of the portion 24O is preferably 20 or more, more preferably 30 or more, further preferably 70 or less, further preferably 60 or less, and more specifically, preferably 20° or more and 70° or less, and more preferably 30° or more and 60° or less. The angle formed by the outer second heat-welded portion 28O and the edge 24I1 of the inner end portion 24I is the same as the angle γ formed by the inner second heat-welded portion 28I and the outer edge portion 24O.

From the viewpoint of ensuring the firm thermal fusion of the three-layer portion, in the longitudinal direction (Y The distance between the adjacent inner second heat-welded portions 28I and the outer second heat-welded portions 28O in the direction) is preferably 5 mm or less.

The sheet for forming the three-dimensional protective sheet of the diaper 1B on both sides in the longitudinal direction of the absorbent main body 2 is fixed to the surface sheet 21 via the adhesive layer 67 as shown in Fig. 6, and the adhesive layer 62 is connected via the adhesive. On the other hand, the outer layer composite sheet 22 is fixed to the outer side in the width direction (X direction) from the side edge of the surface sheet, and is fixed to the sheet 31 constituting the side sheet 3 via the front side adhesive layer 66. Moreover, the sheet for forming the three-dimensional protective sheet 24 is fixed to the surface sheet 21 via the adhesive layer 68 on both side portions in the longitudinal direction of the absorbent main body 2. The adhesive layer 68 is disposed further inward in the width direction (X direction) than the adhesive layer 67 (on the side of the center line CL in the longitudinal direction), and is provided on the front side portion A and the back side portion B, and is not provided on the other hand. Lower C. The adhesive layer 67, the adhesive layer for connection 62, and the surface-side adhesive layer 66 other than the adhesive layer 68 are formed over substantially the entire length of the absorbent body 2.

In the diaper 1B, as shown in FIG. 6, the three-layer structure portion 24b and the two-layer structure portion 24a are disposed on the surface-side adhesive layer 66. That is, in the width direction (X direction), the position of the surface side adhesive layer 66 spans 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 those of the diaper 1A of the first embodiment are produced. In particular, according to the diaper 1B, the outer end portion 24O is not joined to the side panel 3 by the inner end portion 24I, so that the diaper is worn. At the time of 1B or during wearing, by receiving and buffering the stretching from the side panel 3 at the outer end portion 24O, the occurrence of breakage or cracking in the vicinity of the joint portion of the side panel 3 and the side panel 3 and the absorbent body 2 is further prevented. effect.

As shown in FIG. 7 and FIG. 8 , the three-layer structure portion 24b of the diaper 1C has an outer end portion 24O on the side sheet 3 side of the sheet for forming the three-dimensional protective sheet (opposite to the center line CL in the longitudinal direction) and The inner end portions 24I on the side of the absorbent main body 2 (on the side of the center line CL in the longitudinal direction) are formed by folding over the inner surface side (the P side in Fig. 8). Further, the three-layer structure portion of the diaper 1C is formed by covering the folded outer end portion 24O with the folded inner end portion 24I. That is, the outside of the fold The inner surface of the end portion 24O and the outer surface of the folded inner end portion 24I are joined by heat welding.

The layer (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded-out three-dimensional protective forming sheet 24 is the same as the diaper 1A, and is arranged in a scatter-like first heat-sealed manner as shown in Fig. 7 . The portion 27 is joined, and the folded sheet for forming the three-dimensional protective sheet is in the form of a sheet.

Regarding the three-layered structural portion 24b between the layers of the sheet for forming the three-dimensional protective sheet for folding, as shown in Fig. 7, in the diaper 1C, the outer end portion 24O and the inner end portion 24I of the fold are folded over. In the overlapping portion (three-layer structure portion 24b), the plurality of second heat-welding portions 28 are arranged at substantially equal intervals in the longitudinal direction (Y direction). Each of the second heat-fusible portions 28 is disposed between the edge 24O1 of the outer end portion 24O and the edge 24I1 of the inner end portion 24I, and is formed to prevent the interlayer of the sheet for forming a three-dimensional protective sheet from being stretched by the sheet in the X direction. The angle δ formed by the edge 24I1 of each of the second heat-fusible portions 28 and the inner end portion 24I is preferably 20° or more from the viewpoint of dispersing the heat-fusible portion and dispersing the force with respect to the tensile direction. 30° or more, more preferably 70° or less, further preferably 60° or less, more specifically 20° or more and 70° or less, and further preferably 30° or more and 60° or less.

The sealing pattern area of one second heat-welding part 28 is preferably 1.5 mm ² or more from the viewpoint of securing the heat-sealed portion of the three-layer structure portion and preventing peeling between the layers of the sheet for forming a three-dimensional protective layer. Preferably, it is 3 mm ² or more, and more preferably 20 mm ² or less, further preferably 10 mm ² or less, and more specifically, preferably 1.5 mm ² or more and 20 mm ² or less, and more preferably 3 mm ² or more and 10 mm ^{2 .} the following. The ratio of the total seal pattern area of the plurality of second heat-fusible portions 28 to the total area of the folded-out three-dimensional protective sheet 24 is preferably 1% or more and 10% or less from the viewpoint of ensuring strength. In Fig. 7, the heat-welding portion only indicates one row, but a plurality of rows may be provided. From the viewpoint of ensuring strong heat fusion of the three-layer portion, the distance between the second heat-welded portions 28 adjacent in the longitudinal direction (Y direction) in one row is preferably 5 mm or less.

The three-dimensional protective forming sheet 24 of the diaper 1C is in the longitudinal direction of the absorbent body 2 As shown in FIG. 8, the side portion is fixed to the surface sheet 21 via the adhesive layer 67, and is fixed to the outer side in the width direction (X direction) from the side edge of the surface sheet via the adhesive layer 62 for connection. The outer layer composite sheet 22 is fixed to the sheet 31 constituting the side sheet 3 via the surface side adhesive layer 66. Further, the sheet for forming a three-dimensional protective sheet 24 is fixed to the top sheet 21 via the adhesive layer 68 on both side portions in the longitudinal direction of the absorbent main body 2 .

In the diaper 1C, as shown in Fig. 8, only the two-layer structure portion 24a is disposed on the surface-side adhesive layer 66. In other words, in the width direction (X direction), the three-layer structure portion 24b is disposed on the inner side in the width direction (X direction) as shown in FIG. 8 and further on the base end of the side sheet 3. The portion 3b is disposed further inward in the width direction (X direction), 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).

According to the diaper 1C of the third embodiment, the same effects as those of the diaper 1A of the first embodiment are produced. In particular, according to the diaper 1C, the sheet end surface (which is followed by the outer side of the sheet 24 for forming the three-dimensional protective sheet for folding) The side of the portion 24O and the inner end portion 24I is smooth on the opposite side (the surface on the outer surface side (the Q side in FIG. 8)), so that the effect of further reinforcing the sheet mounting strength is produced.

The three-layer structure portion 24b of the diaper 1D is the same as the diaper 1A, and as shown in Figs. 9 and 10, the outer side end portion 24 of the side sheet 3 side of the sheet for forming the three-dimensional protective sheet 24 (the center line with the long side direction) The inner end portion 24I on the side opposite to the side of the absorbent body 2 (the side on the center line CL side in the longitudinal direction) is formed by folding outward on the outer surface side (the Q side in FIG. 10). Further, in the same manner as the diaper 1A, the three-layer structure portion of the diaper 1B is formed by covering the folded outer end portion 24O with the folded inner end portion 24I.

In the same manner as the diaper 1A, the layers of the three-dimensional protective forming sheet 24 (the two-layered structural portion 24a and the three-layered structural portion 24b) are arranged in a plurality of first scatters as shown in FIG. The heat-welding portion 27 is joined, and the folded-out three-dimensional protective sheet 24 is formed into a sheet shape.

The three-layer structural part within the layer between the sheet 24 for forming the three-dimensional protection forming of the folding As shown in Fig. 9, in the same manner as the diaper 1A, the plurality of inner second heat-welded portions 28I are substantially equally spaced in the longitudinal direction (Y direction) at the edge 24O1 of the folded-out end portion 24O. Arranged at intervals, and on the edge 24I1 of the inner end portion 24I, the plurality of outer second heat-welded portions 28O are arranged at substantially equal intervals in the longitudinal direction (Y direction). Similarly to the diaper 1A, each of the inner second heat-fusible portions 28I intersects with the edge α of the outer end portion 24O at an angle α formed therebetween, and is disposed across the two-layer structure portion 24a and the three-layer structure portion 24b. Further, each of the outer second heat-welded portions 28O is disposed at an angle β formed by the edge 24I of the inner end portion 24I in the same manner as the diaper 1A, and is disposed across the two-layer structure portion 24a and the three-layer structure portion 24b. As shown in Fig. 9, in the diaper 1D, each of the inner second heat-fusible portions 28I and the outer second heat-welded portions 28O are alternately arranged in the longitudinal direction (Y direction).

The distance between the inner second heat-welded portions 28I adjacent to each other in the longitudinal direction (Y direction) or the interval between the outer second heat-fusible portions 28O is preferably 0.5 mm or more, similarly to the diaper 1A, and It is preferably 5 mm or less, more preferably 3 mm or less, and still more preferably 0.5 mm or more and 3 mm or less.

The sheet for forming the three-dimensional protective sheet of the diaper 1D is attached to both sides of the longitudinal direction of the absorbent body 2, and is fixed to the surface sheet 21 via the adhesive layer 67 as shown in Fig. 10, via the adhesive layer for connection. 62, the outer layer composite sheet 22 is fixed to the outer side in the width direction (X direction) from the side edge of the surface sheet, and is fixed to the sheet 31 constituting the side sheet 3 via the surface side adhesive layer 66. Further, the sheet for forming a three-dimensional protective sheet is attached to the surface sheet 21 via the adhesive layer 68 on both side portions in the longitudinal direction of the absorbent body 2.

In the diaper 1D, as shown in FIG. 10, only the two-layer structure portion 24a is disposed on the surface-side adhesive layer 66. In other words, in the width direction (X direction), the three-layer structure portion 24b is disposed on the inner side in the width direction (X direction) as shown in FIG. 10, and further on the inner side of the side sheet 3. The portion 3b is disposed further inward in the width direction (X direction), 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).

According to the diaper 1D of the fourth embodiment, the same effects as those of the diaper 1A of the first embodiment are produced. However, in particular, according to the diaper 1D, the outer end portion 24O is not joined to the side panel 3 by the inner end portion 24I, so that it is worn. In the case of the diaper 1D or during wearing, by the outer end portion 24O receiving and buffering the stretching from the side panel 3, the occurrence of breakage or cracking in the vicinity of the joint portion of the side panel 3 and the side panel 3 and the absorbent body 2 is further prevented. effect.

The method for producing the disposable diaper or the side sheet and the sheet for forming a three-dimensional protective sheet of the present invention is not limited, and can be produced by any method.

In the preferred embodiment of the method for producing the side panel in the disposable diaper, the case of producing the side panel 3 in the diaper according to the first to fourth embodiments will be described as an example.

An example of a preferred manufacturing method of the side panel 3 will be described with reference to Fig. 11. The apparatus 7 for manufacturing a stretchable sheet shown in Fig. 11 includes a pair of long-side structures 71 and 71 for line transport, which are separated and specified. The elastic winding mechanism 72 winds the elastic member around the pair of long-side structures for wire transport, and the direction of the elastic member is the longitudinal direction of the long-side structure for wire transport. (the direction in which the R direction in the figure) intersects; and the integration mechanism 73 that holds the elastic member 33 that is wound around the elastic body winding mechanism 72 and is transported by the wire transporting long side structure. The strip sheets 31' and 32' are integrated between each other. The long side structure 71 for wire transport has a forward portion that moves in the R direction and a reverse portion that moves in the opposite direction to the R direction, and it is preferable to use only the straight portion to engage with the elastic member 33. The elastic member 33 conveys the endless belt in the R direction. The endless belt is erected on a pulley or a gear, and the pulley or the gear is rotated to drive. In addition, as one of the endless belts, it is preferable to use only one such endless belt, but it is preferable to use such a loop as the long-side structure 71 for each line transport as shown in Fig. 11 . The belt is configured for the upper and lower sections. By setting the speed difference between the upper and lower belts, the orientation of the zigzag elastic member 33 can be corrected so that the elastic member 33 is along the R direction when first attached to the pair of line transport long side structures 71 and 71. The plurality of parallel shapes are arranged at intervals, and are fixed between the pair of strip-shaped sheets 31' and 32'. As the long side structure 71 for line transport, It is possible to use a circular rod-like body in which a groove or a rib is spirally provided around the circumference to rotate the driver around the central axis.

In the preferred manufacturing method of the side panel 3, as shown in Fig. 11, the strip-shaped sheet 32' which is the original sheet of the sheet 32 is continuously coated in a strip shape by a known adhesive applicator 75. The cloth is used to form the adhesive adhesive layer 63 and the adhesives 63' and 64' of the second reinforcing adhesive layer 64, and then, by means of the anchors 63' and 64', Sailor guides (not shown) or the like fold the both side portions of the strip-shaped sheet 32' toward the surface side that does not face the strip-shaped sheet 31'. On the other hand, the strip-shaped sheet 31' which is the original sheet of the sheet 31 is continuously coated in a strip shape by a known adhesive applicator 76 to form the body-side adhesive layer 35, the front end side. Next, the agent layer 36 and the adhesive 34 of the intermediate adhesive layer 37. Further, the adhesive 34 may be continuously applied to the strip sheet 32'.

Then, the two strip-shaped sheets 31', 32' after the application of the adhesive are joined in such a manner that the elastic members 33 in the stretched state are sandwiched therebetween, by the nip roller 74 as one of the integrated mechanisms 73. These are pressurized by the upper and lower sides and integrated. Then, the elastic member 33 that protrudes laterally is cut by a cutting mechanism 77 such as a cutter having a cutting blade, whereby the stretchable sheet 3' is obtained.

Then, the obtained stretchable sheet 3' is sequentially cut into the length of each side sheet by an arbitrary cutting mechanism. In this way, the side panels 3 can be continuously produced efficiently.

In the method for producing a disposable diaper, a disposable diaper can be produced in accordance with a conventionally known method, except that the side panel 3 (the stretchable sheet 3') is used.

In a preferred manufacturing method, for example, the side panel 3 (stretchable sheet 3') can be used, and the diaper can be efficiently produced in the following order (1) to (10). (1) A continuous woven fabric of a fastening tape 4 which is used to form an adhesive for forming the second bonding adhesive layer 65 is cut and applied, and is continuously attached to the continuous woven fabric of the elastic sheet 3' obtained in the above manner. (2) Folding the adhesive tape 4 and temporarily fixing it to the stretch sheet 3'. (3) The adhesive (for bulk connection) for forming the adhesive layer 62 for connection is continuously applied to the stretch sheet 3'. (4) In order to obtain a sheet for forming a three-dimensional protective sheet 24. In a further step, the continuous sheet is folded in such a way as to form a fold. The elastic member 25 is fixed to the bent portion by an adhesive in an extended state. Next, the first heat seal portion 27 is provided by heat sealing or the like, and the second heat seal portion 28 is further formed. (5) A top sheet continuous body in which the sheet for forming the three-dimensional protective sheet 24 obtained in the other step and the surface sheet 21 are integrated via the adhesive layers 67 and 68 is formed. (6) In another step, the leakage preventing sheet 22a and the outer layer non-woven fabric 22b are integrated to form the outer layer composite sheet 22. (7) The stretch sheet 3' is cut intermittently, and is attached to the surface sheet 21 (the sheet for forming a sheet for stereoscopic protection) via the surface side adhesive layer 66, and is attached to the outer layer via the adhesive layer 62 for connection. Sheet 22. (8) The absorber 23 is sandwiched between the surface sheet 21 and the outer layer composite sheet 22 to be integrated. (9) Fold the sides of the product (side panel extension) inward. (10) Cutting into one product.

Further, in the above preferred manufacturing method, after the first heat sealing portion 27 is formed, the second heat sealing portion 28 is further formed, but the convex portion corresponding to the first heat sealing portion 27 may be provided on the same roller. The first portion and the second heat-fusible portion 28 are simultaneously formed by the convex portion corresponding to the second heat-welding portion 28.

Method of Manufacturing Disposable Diaper In addition to the use of the side panel 3 obtained in the above manner to produce a disposable diaper, a disposable diaper can be manufactured in accordance with a conventionally known method.

As the means for sandwiching and fixing the elastic member between the pair of strip-shaped sheets, the apparatus shown in Fig. 11 and Fig. 12 of Patent Document 1 can be used.

The present invention has been described above based on the preferred embodiment, but the disposable diaper according to the present invention is not subject to any of the diaper 1A of the first embodiment, the diaper 1B of the second embodiment, and the diaper 1C of the third embodiment. Restrictions can be changed as appropriate. In addition, each of the components of the diapers 1A to 1D of the above-described first to fourth embodiments can be combined as appropriate without departing from the gist of the present invention.

For example, in the diapers 1A to 1D of the above-described first to fourth embodiments, the layers (the two-layer structure portion 24a and the three-layer structure portion 24b) of the folded-out three-dimensional protective sheet 24 are as shown in Figs. 3 and 5 . As shown in FIG. 7 and FIG. 9, the plurality of first heat seal portions 27 are arranged in a scatter shape. In addition, the three-layer structure portion 24b is joined by the second heat-welding portion 28, but the second heat-welding portion 28 may not be provided as in the diaper 1E of another embodiment shown in FIG. The two-layer structure portion 24a and the three-layer structure portion 24b are joined only by the first heat-welding portion 27. Further, it is also possible that the layers of the folded-out three-dimensional protective forming sheet 24 (only the two-layer structural portion 24a) are joined by the first heat-fusible portion 27, and only the three-layered structural portion 24b is made of the second heat. The welded portion 28 is joined.

Further, the joining between the layers of the folded-out three-dimensional protective forming sheet 24 is joined by welding, but may be joined by an adhesive. Further, the first heat-sealed portion 27 may not be provided, and the two-layer structure portion may be joined by an adhesive, and the three-layer structure portion may be joined by the second heat-welded portion 28.

Further, in the diapers 1A, 1B, and 1D of the first, second, and fourth embodiments, the second heat-fusible portion 28 is welded by the inner second heat-fusible portion 28I and the outer second heat-welded portion 28O. The portion is formed, but may be formed of only one type of welded portion. When it is formed by only one type of welded portion, a plurality of the heat-dissipating portions 28 of the diaper 1C of the third embodiment are arranged at substantially equal intervals in the longitudinal direction (Y direction). In addition to the form, it may have a linear shape extending in the longitudinal direction (Y direction) in a zigzag shape or a wave shape.

Further, in the diapers 1A and 1D of the above-described first and fourth embodiments, as shown in Figs. 3 and 9, the inner second heat-welded portion 28I and the outer edge portion 24O edge 24O1 intersect at an angle α formed. The outer second heat-welded portion 28O and the edge 24I1 of the inner end portion 24I intersect at an angle β formed. In the diaper 1B of the second embodiment, as shown in FIG. 5, the inner second heat-welding portion is provided. The edge of the 28I and the outer end portion 24O is intersected by the angle γ, and the outer second heat-welding portion 28O and the edge 24I1 of the inner end portion 24I intersect at an angle γ formed therebetween, and the diaper according to the third embodiment. In 1C, as shown in Fig. 7, each of the second heat-fusible portions 28 and the edge 24I1 of the inner end portion 24I intersect at an angle δ formed, but the angle formed by these may be an angle other than the above range.

Further, in the diapers 1A to 1D of the above-described first to fourth embodiments, the sheet for forming a three-dimensional protective sheet 24 is fixed to the sheet 31 via the surface side adhesive layer 66, but may be other than the adhesive. Fixation of heat fusion.

In the diapers 1A to 1D of the above-described first to fourth embodiments, the sheet 32 constituting the side sheet 3 is folded over and joined to the reinforcing adhesive layer 63 (the second reinforcing adhesive layer 64). It is also possible not to fold. Further, the sheet 32 constituting the side sheet 3 may be folded and joined to the reinforcing adhesive layer 63 (the second reinforcing adhesive layer 64), or the base end portion 3b side or the front end portion of the side sheet 3 may be formed. The end portion of the sheet 32 on the 3a side is folded toward 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 sheet 3. Further, both the sheet 32 and the sheet 31 may be folded. Further, instead of folding the sheet 32 constituting the side sheet 3, a sheet of another material may be placed in a superposed manner to be bonded to the reinforcing adhesive layer 63 (second reinforcing adhesive layer 64).

Further, in the diapers 1A to 1D of the first to fourth embodiments, the side panels 3 are attached to both side portions of the absorbent body 2 as shown in Fig. 1, but may be attached to one side. form.

Further, in the diapers 1A to 1D of the first to fourth embodiments, as shown in Figs. 4, 6, and 8, the tape base material 42 of the fastening tape 4 is bonded to the sheet by an adhesive. 32 is an example of the outer surface (not the side of the sheet 31 side), but the tape base material 42 may be joined to the inner surface (not the side of the sheet 32 side) of the sheet 31 by an adhesive. Or disposed between the sheet 31 and the sheet 32 and joined by an adhesive.

In the above embodiment, the following disposable diaper is further disclosed.

<1> A disposable diaper comprising: an absorbent body comprising an absorbent body, a surface sheet disposed on an inner surface side of the absorbent body, and an outer layer composite sheet disposed on an outer surface side of the absorbent body; a stretchable side panel attached to one or both sides of the longitudinal direction of the absorbent body; wherein the side panel is provided with a fastening tape at the front end portion, and the absorbent body is disposed on the absorbent body Both sides of the long side direction The sheet for forming a three-dimensional protective layer, wherein the sheet for forming a three-dimensional protective sheet has a two-layer structure portion and a three-layer structure portion in which both side portions of one sheet are folded and overlapped with each other, and the two-layer structure portion and The three-layer structure portion is bonded to each other, and a sheet constituting the side sheet is fixed to both side portions in the longitudinal direction of the absorbent body.

<2> The disposable diaper according to the above <1>, wherein the bonding between the layers is performed by heat welding.

The disposable diaper according to the above aspect, wherein the sheet for forming a three-dimensional protective sheet is fixed to a sheet constituting the side sheet via a surface-side adhesive layer.

The disposable diaper according to any one of the above aspects, wherein the three-layer structure portion is an outer end portion of the one side sheet side of the sheet for forming a three-dimensional protective sheet, and the absorbent layer. The inner end portions of the main body side are respectively formed by folding the outer surface side of the sheet for forming a three-dimensional protective sheet.

The disposable diaper according to any one of the above aspects, wherein the three-layer structure portion is an outer side end portion of the one side sheet side forming sheet and the absorbent member. The inner end portions of the main body side are respectively formed by folding the inner surface side of the sheet for forming a three-dimensional protective sheet.

The disposable diaper according to any one of the above aspects, wherein the three-layered structure portion is formed by covering the outer end portion of the folded portion with the inner end portion of the folded portion.

The disposable diaper according to any one of the above aspects, wherein the three-layered structure portion is formed by covering the inner end portion of the folded portion with the outer end portion of the folded portion.

<8> The disposable diaper according to the above <7>, wherein the outer end portion is joined to the side panel.

<9> The disposable diaper according to any one of <1> to <8> above, wherein The two-layer structure portion of the sheet for forming a three-dimensional protective sheet is joined by a first heat-welding portion.

The disposable diaper according to any one of the above-mentioned items, wherein the two-layer structure portion and the three-layer structure portion of the sheet for forming a three-dimensional protective sheet which is folded over are first The heat fusion joint is joined.

The disposable diaper according to the above-mentioned item <9>, wherein the first heat-welding portion is disposed in a plurality of scatter shapes, and the first heat-welded portion has a circular shape, an elliptical shape, and a rhombus shape. , triangles, polygons.

The disposable diaper according to any one of the above-mentioned items, wherein the sealing pattern area of one of the first heat-welded portions is 0.5 mm ² or more or 1.5 mm ² or more and 10 mm ^{2 .} Hereinafter, it is 5 mm ² or less, and is 0.5 mm ² or more and 10 mm ² or less, or 1.5 mm ² or more and 5 mm ² or less.

The disposable diaper according to the above <11>, wherein the ratio of the total seal pattern area of the plurality of first heat-welded portions to the total area of the folded sheet for forming the three-dimensional protective sheet is 2% or more or 5% or more, and 15% or less or 10% or less, and 2% or more and 15% or less, or 5% or more and 10% or less.

The disposable diaper according to any one of the above-mentioned items, wherein the three-layer structure portion of the sheet for forming a three-dimensional protective sheet which is folded over is joined by a second heat-welded portion.

<15> The disposable diaper according to the above <14>, wherein the second heat-fusible portion is disposed over the two-layer structure portion of the sheet for forming a three-dimensional protective sheet which is folded over and folded.

<16> The disposable diaper according to the above <14>, wherein the second heat-welded portion has a linear shape.

The disposable diaper according to any one of the above-mentioned <14>, wherein the second heat-welded portion intersects with the longitudinal direction of the disposable diaper.

<18> The disposable diaper according to the above <17>, wherein the angle α between the second heat-fusible portion and the edge of the outer side edge portion of the sheet for forming a three-dimensional protective sheet is greater than 0°, or 20° or more or 30° The above is 70° or less or 60° or less, and is 20° or more and 70° or less, or 30° or more and 60° or less.

The disposable diaper according to the above <16>, wherein the second heat-fusible portion has a linear shape extending in a zigzag shape or a wave shape in the longitudinal direction.

The disposable diaper according to any one of the above-mentioned, wherein the sealing pattern area of one of the second heat-welded portions is 1.5 mm ² or more or 3 mm ² or more and 20 mm ² or less. Or 10 mm ² or less, and it is 1.5 mm ² or more and 20 mm ² or less, or 3 mm ² or more and 10 mm ² or less.

The disposable diaper of the above-mentioned <20>, wherein the ratio of the total area of the second heat-welded portion to the total area of the sheet for forming the three-dimensional protective sheet of the folded portion is 1% or more or 3% or more, and It is 10% or less or 8% or less, and is also 1% or more and 10% or less, or 3% or more and 8% or less.

The disposable diaper according to any one of the above aspects, wherein the seal pattern area of one of the second heat seal portions is larger than the seal pattern area of the one first heat seal portion.

The disposable diaper according to the above aspect, wherein the sheet for forming a three-dimensional protective layer is fixed to the sheet constituting the side sheet via a surface-side adhesive layer, and the three-layer structure portion is disposed on the sheet. The above surface is on the side of the adhesive layer.

<24> The disposable diaper according to the above <23>, wherein only the three-layer structure portion is disposed on the surface-side adhesive layer.

<25> The disposable diaper according to the above <23>, wherein the three-layer structure portion and the two-layer structure portion are disposed on the surface-side adhesive layer.

<26> The disposable diaper according to the above <23>, wherein only the two-layer structure portion is disposed on the surface-side adhesive layer.

The disposable diaper according to any one of the above aspects, wherein the absorbent body has a ventral side portion on the ventral side of the wearer when worn, and a back side on the back side of the wearer. And a side portion located at a lower portion of the crotch portion, wherein the side panels are attached to both sides of the absorbent body in the back side portion so as to protrude outward from both side edges of the absorbent body.

The disposable diaper according to any one of the above aspects, wherein the side panel is fixed to the absorbent body and the sheet for forming a stereoscopic protection via an adhesive layer.

The disposable diaper according to any one of the above aspects, wherein the side panel has two sheets made of non-woven fabric, and is fixed to 2 in a state of being stretched in the width direction of the disposable diaper. A plurality of elastic members between the sheets.

The disposable diaper according to any one of the above-mentioned one of the two sheets of the above-mentioned side sheets, wherein the sheet on the outer surface side of the side sheet is attached to the side The base end portion of the sheet is folded toward the outer surface side of the sheet, and the folded portion is joined to the outer surface of the sheet via the reinforcing adhesive layer.

The disposable diaper according to any one of the above aspects, wherein the absorbent body has a ventral side portion on the ventral side of the wearer when worn, and a back side on the back side of the wearer. And a portion for forming the three-dimensional protective sheet on the inner side in the width direction of the absorbent body in the vicinity of the end edge in the width direction of the absorbent body, and having a three-dimensional protective forming elastic member along the end edge, by wearing The contraction force of the elastic member causes a portion of the crotch portion that is a certain width from the end edge to leave the surface sheet to form a three-dimensional shield.

The disposable diaper according to any one of the above aspects, wherein the sheet for forming a three-dimensional protective sheet is applied to both sides of the longitudinal direction of the absorbent body via a surface-side adhesive layer. Further, the sheet is fixed to the side sheets, and is fixed to the surface sheet via an adhesive layer.

<33> The disposable diaper according to the above <3>, wherein the surface side adhesive agent The layer is formed over substantially the entire length of the absorbent body.

The disposable diaper according to any one of the above-mentioned, wherein the ratio of the area of the three-layer structure portion to the total area of the sheet for forming the three-dimensional protective sheet of the folded sheet is 3%. The above is 5% or more, and is 25% or less or 15% or less, or 3% or more and 25% or less, or 5% or more and 15% or less.

The disposable diaper according to any one of the above-mentioned items, wherein the three-layer structure portion has a width W1 of 2 mm or more or 5 mm or more, 20 mm or less or 15 mm or less, and 2 mm. Above 20 mm or less, or 5 mm or more and 15 mm or less.

The disposable diaper of the above-mentioned <3>, wherein the one side of the side sheet side of the sheet for forming the above-mentioned three-dimensional protective sheet is folded and the side sheet is fixed by the surface side adhesive layer. .

The disposable diaper according to any one of the above aspects, wherein the disposable diaper has a main body side adhesive layer, a reinforcing adhesive layer, a bonding adhesive layer, and an outer layer of an adhesive layer. The main body side adhesive layer, the reinforcing adhesive layer, the bonding adhesive layer, and the outer layer of the adhesive layer are overlapped so as not to form a gap therebetween, and are substantially continuous in the width direction of the disposable diaper. .

The disposable diaper according to any one of the above aspects, wherein the disposable diaper has a front end side adhesive layer, a second reinforcing adhesive layer, and a second connecting adhesive layer. The front end side adhesive layer, the second reinforcing adhesive layer, and the second connection adhesive layer are superposed so as not to form a gap therebetween, and are substantially continuous in the width direction of the disposable diaper.

1A‧‧‧Disposable diapers

2‧‧‧Absorbable ontology

3‧‧‧ side film

3a‧‧‧ front end of side panels

3b‧‧‧The base end of the side panel (end of the absorbent body side)

4‧‧‧Buckle tape

21‧‧‧Surface sheet

22‧‧‧Outer composite sheet

22a‧‧‧Leak-proof sheet

22b‧‧‧Outer non-woven fabric

23‧‧‧Acceptor

24‧‧‧Three-dimensional protective forming sheet

24a‧‧2 layer structure

24b‧‧‧3 structural part

24I‧‧‧Inside end

24I1‧‧‧ the edge of the inner end

24O‧‧‧Outer end

24O1‧‧‧The edge of the outer end

25‧‧‧Elastic members for forming three-dimensional protection

31, 32‧‧‧ sheets

33‧‧‧Flexible components

35‧‧‧ Body side adhesive layer

35a‧‧‧End

36‧‧‧ front-end side adhesive layer

36b‧‧‧End

37‧‧‧Intermediate adhesive layer

38‧‧‧ Non-continuous area

41‧‧‧ Fixture

42‧‧‧With substrate

61‧‧‧ outer layer of adhesive

61a‧‧‧End

62‧‧‧Connecting adhesive layer

62a‧‧‧End

63‧‧‧Reinforcing adhesive layer

63a‧‧‧End

64‧‧‧2nd reinforcing adhesive layer

64b‧‧‧End

65‧‧‧2nd bonding adhesive layer

65b‧‧‧End

66‧‧‧Surface side adhesive layer

67, 68‧‧‧ adhesive layer

P1‧‧‧ overlapping parts

P2‧‧‧ overlapping parts

P3‧‧‧ overlapping parts

P4‧‧‧ overlapping parts

P5‧‧‧ overlapping parts

W1‧‧‧Width

X‧‧‧Width direction

Claims (19)

A disposable diaper comprising: an absorbent body comprising an absorbent body, a surface sheet disposed on an inner surface side of the absorbent body, and an outer layer composite sheet disposed on an outer surface side of the absorbent body; and a stretchable layer a side panel attached to one or both sides of the longitudinal direction of the absorbent body; and the side panel is provided with a fastening tape at the front end portion, and the absorbent body is disposed at a longitudinal direction of the absorbent body a sheet for forming a three-dimensional protective layer on both sides, wherein the sheet for forming a three-dimensional protective sheet has a two-layer structure portion and a three-layer structure portion in which both side portions of one sheet are folded and overlapped with each other. The layer structure portion and the three-layer structure portion are joined to each other, and are fixed to the sheet constituting the side sheet at both side portions in the longitudinal direction of the absorbent body. The disposable diaper of claim 1, wherein the joining between the layers is performed by heat welding. The disposable diaper according to claim 1 or 2, wherein the sheet for forming a stereoscopic protective sheet is fixed to a sheet constituting the side sheet via a surface side adhesive layer. The disposable diaper of claim 3, wherein the surface side adhesive layer is formed over substantially the entire length of the absorbent body. The disposable diaper according to claim 3, wherein the folded inner end portion of the one side panel side of the sheet for forming the three-dimensional protective sheet and the side sheet are fixed by the surface side adhesive layer. The disposable diaper according to claim 1 or 2, wherein the three-layered structural portion directly protects the one-side outer side end portion of the one piece of the three-dimensional protective forming sheet and the inner end portion of the absorbent body side toward the three-dimensional protective portion The forming sheet is formed by folding the outer surface side. The disposable diaper according to claim 1 or 2, wherein the three-layered structural portion directly protects the one-side outer side end portion of the one piece of the three-dimensional protective forming sheet and the inner end portion of the absorbent body side toward the three-dimensional protective portion The inner surface of the forming sheet is folded over. The disposable diaper according to claim 1 or 2, wherein the three-layered structural portion is formed by covering the outer end portion of the folded portion with the inner end portion of the folded portion. The disposable diaper according to claim 1 or 2, wherein the two-layer structure portion of the sheet for forming the three-dimensional protective sheet which is folded over is joined by the first heat-welding portion. The disposable diaper according to claim 1 or 2, wherein the two-layered structural portion and the three-layered structural portion of the sheet for forming the three-dimensional protective sheet which are folded are joined by a first heat-welded portion. The disposable diaper according to claim 1 or 2, wherein the three-layered structural portion of the sheet for forming the three-dimensional protective sheet which is folded over is joined by the second heat-welding portion. The disposable diaper according to claim 11, wherein the second heat-fusible portion is disposed over the two-layer structure portion of the sheet for forming a three-dimensional protective sheet which is folded and folded. The disposable diaper according to claim 11, wherein the second heat-welding portion has a linear shape. The disposable diaper according to claim 11, wherein the second heat-fusible portion intersects with a longitudinal direction of the disposable diaper. In the disposable diaper of claim 11, the seal pattern area of one of the second heat-welded portions is larger than the seal pattern area of the one of the first heat-welded portions. A disposable diaper according to claim 1 or 2, wherein said absorbent body has a ventral side portion on the ventral side of the wearer when worn, a back side portion on the back side of the wearer, and a crotch portion located at the crotch portion of the ankle. The sheet for forming a three-dimensional protective sheet has a three-dimensional protective formation along the end edge near the end edge in the width direction of the absorbent body. With the elastic member, when worn, the portion of the crotch portion having a certain width from the end edge is separated from the surface sheet by the contraction force of the elastic member to form a three-dimensional shield. The disposable diaper according to claim 1 or 2, wherein the sheet for forming a three-dimensional protective sheet is fixed to the sheet constituting the side sheet via the surface side adhesive layer on both side portions in the longitudinal direction of the absorbent body. And it is fixed to the said surface sheet via the adhesive layer. The disposable diaper according to claim 1 or 2, wherein the disposable diaper has a body side adhesive layer, a reinforcing adhesive layer, a bonding adhesive layer, and an outer layer of an adhesive layer, the body side adhesive layer, and the reinforcing layer The adhesive layer, the adhesive layer for the connection, and the outer adhesive layer are superposed so as not to form a gap therebetween, and are substantially continuous in the width direction of the disposable diaper. The disposable diaper according to claim 1 or 2, wherein the disposable diaper has a front end side adhesive layer, a second reinforcing adhesive layer, and a second connecting adhesive layer, and the front end side adhesive layer and the second reinforcing layer The adhesive layer and the second adhesive layer are superposed so as not to form a gap therebetween, and are substantially continuous in the width direction of the disposable diaper.