TW201427651A - Disposable diaper - Google Patents

Abstract

This diaper (1A) is provided with an absorbent main unit (2) having an absorber (23), and elastic side panels (3) attached to both side portions (2S) of the absorbent main unit (2). The absorbent main unit (2) has side sheets (24) disposed on both side portions (2S) thereof. The side panels (3) are formed so as to fix elastic members (33), which are in a state of being elongated in the X-direction, between two side panel sheets (31 and 32) by way of a main unit-side adhesive layer (35) and an outer-side adhesive layer (36). On the side panels (3), in a natural state, by way of contractive force of the elastic members (33), between the main unit-side adhesive layer (35) and the outer-side adhesive layer (36), a gathering area (GT) is formed, comprising hollow gathers in which the respective elastic member (33) is not fixed by the side panel sheets (31 and 32). In this diaper (1A), outer-side edge portions (2S1) along the Y-direction of the absorbent main unit (2) are upon the gathering areas (GT) of the side panels (3).

Description

Disposable diaper

This invention relates to an unfolded disposable diaper.

The present applicant has previously proposed to have the back side portion of the absorbent body including the absorbent body from the viewpoint of suppressing the use amount of the material for the side sheet or the waste generated from the material in terms of environment or cost. An unfolded disposable diaper having a stretchable side panel that expands and contracts in the width direction of the absorbent body is attached to both side portions (see Patent Document 1).

In the disposable diaper according to the first aspect of the invention, the fastening tape provided on the outer end portion of the side panel in the width direction is fixed to the side panel by the belt fixing portion in a state of being superposed on the side panel, and the side panel is attached to the belt. The lower adjacent portion of the fixing portion has a plurality of creases generated by the contraction of the elasticized portion. Therefore, it is a disposable diaper which is not easy to cause elongation, cracking, peeling, etc. of a fastening tape.

Prior technical literature Patent literature

Patent Document 1: WO2012073901 (A1)

In general, when such a disposable diaper is worn, since the stretchable side panel is stretched, the wearing pressure of the side portion of the absorbent body to which the stretchable side panel is attached is relatively high. Moreover, in the side panel of the stretchability, there is also a problem that the elastic member is fixed in the side sheet between the two sheets in an extended state, and the elastic member is fixed in order to firmly fix the elastic member. The amount of the adhesive applied to the end fixing portion of the member becomes larger, and becomes harder or more sticky than the peripheral portion. Therefore, depending on the arrangement of the side sheets disposed on the side portions of the absorbent body and the arrangement of the stretchable side sheets, the traces of the body side adhesive layer regions of the elastic members of the side sheets are attached to the wearer's skin. Or the sheet of the side panel is attached to the skin of the wearer.

Patent Document 1 relates to the position and the stretchability side of the side sheet disposed on the side portion of the absorbent body in order to prevent the above-described problem of the main body side adhesive layer region of the elastic member of the side sheet. The contents of the location of the slice are not described. As described above, in the disposable diaper described in Patent Document 1, there is still room for further improvement in terms of improvement in wearability.

The present invention relates to a disposable diaper comprising: a vertically long absorbent body comprising a front sheet disposed on the opposite side of the skin, a back sheet disposed on the non-skin facing side, and disposed on the front side An absorbent body between the sheet and the back sheet; and a stretchable side panel attached to both sides of the absorbent body along the longitudinal direction of the body; and disposed on the outer side of the body width direction of the side panel The fixing portion of the fastening tape at the front end portion is engaged with the non-skin opposing surface of the absorbent body; the absorbent body includes side sheets disposed on both sides of the absorbent body along the longitudinal direction of the body The side panel comprises: two side panel sheets; a plurality of elastic members fixed to the two side panel sheets and extending along the width direction of the body; and a body side adhesive layer fixing the plurality of elastic members An end portion side of the absorbent body side and extending along the longitudinal direction of the body; and a front end side adhesive layer which fixes the end side of the front side of the side piece of the elastic member and extends along the length direction of the body; and the side piece The elastic member in an extended state is formed by fixing the main body side adhesive layer and the front end side adhesive layer between the two side sheet sheets; and in the side sheet, in the natural state, by the plurality of sheets The contraction force of the elastic member is formed between the body side adhesive layer and the front end side adhesive layer, and the elastic member is not solid And the side panel includes a plurality of intermediate fixing portions disposed between the body side adhesive layer and the front end side adhesive layer to fix the two side sheets And extending along the length direction of the body; the creases are formed between the intermediate fixing portions adjacent to each other in the width direction of the body, and extend in a direction crossing the plurality of elastic members; the body along the body of the absorbent body The outer side edge portion in the longitudinal direction is located on the above-mentioned pleat region of the side panel in plan view.

According to the present invention, there is provided a disposable diaper which is improved in curling or overlapping of a body of an overlapping portion of an absorbent body and a side panel to improve skin feel caused by a step difference and which is improved in wearability.

1A‧‧‧Disposable diapers

1B‧‧‧Disposable diapers

1C‧‧‧Disposable diapers

1D‧‧‧Disposable diapers

1E‧‧‧Disposable diapers

2‧‧‧Absorbable ontology

2S‧‧‧ side

2S1‧‧‧Outside side edge

3‧‧‧ side film

3'‧‧‧Flexible sheet

3a‧‧‧ front end

3d‧‧‧End

4‧‧‧Buckle tape

5‧‧‧With buckle sheet

7‧‧‧Manufacture of equipment

21‧‧‧Front sheet

22‧‧‧ Back sheet

22a‧‧‧Leak-proof sheet

22b‧‧‧Outer non-woven fabric

22b1‧‧‧Outside side edge

23‧‧‧Acceptor

24‧‧‧Side sheet

24I‧‧‧ side

24O‧‧‧ side

24S1‧‧‧X direction outer side edge

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

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

27‧‧‧ Fixed Department

30‧‧‧Intermediate area

30a‧‧‧ front side intermediate area

30b‧‧‧ Body side intermediate area

31‧‧‧Sheet

31'‧‧‧Striped sheet

32‧‧‧Sheet

32'‧‧‧Band sheet

33‧‧‧Flexible components

34‧‧‧Binder

35‧‧‧ Body side adhesive layer

36‧‧‧ front-end side adhesive layer

37‧‧‧Intermediate fixation

38‧‧‧ Non-continuous area

41‧‧‧ Fixed Department

42‧‧‧With substrate sheet

61‧‧‧ outer layer of adhesive

62‧‧‧Connecting adhesive layer

63‧‧‧With adhesive layer for connection

64‧‧‧ adhesive layer

65‧‧‧ adhesive layer

71‧‧‧Wire transporting strip structure

72‧‧‧elastic winding mechanism

73‧‧‧Integrated institutions

74‧‧‧ nip rollers

76‧‧‧Adhesive Coating Machine

77‧‧‧cutting mechanism

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧胯下下

CL‧‧‧ center line

GT‧‧ pleated area

GTa‧‧‧high fold area

GTb‧‧‧ low pleated area

H1‧‧‧ Height

H2‧‧‧ height

P‧‧‧ skin opposite side

Q‧‧‧Non-skin opposite side

R‧‧ Direction

S1‧‧‧ area

S2‧‧‧ area

S3‧‧‧ area

T‧‧‧ overlapping area

X‧‧‧ direction

Y‧‧‧ direction

Fig. 1 is a developed plan view showing a state in which the disposable diaper according to the first embodiment of the present invention is stretched from the side of the front sheet.

Fig. 2 is an enlarged plan view showing a side panel in a state in which the right side of the disposable diaper shown in Fig. 1 is stretched and its vicinity.

FIG. 3 is a cross-sectional view in the width direction of the main body of the disposable diaper according to the first embodiment shown in FIG.

Fig. 4 (a) is a cross-sectional view in the width direction of the side panel shown in Fig. 3 in an extended state, and Fig. 4 (b) is a cross-sectional view in the width direction of the side panel in a state in which the side panel shown in Fig. 3 is contracted.

Fig. 5 is a perspective view showing an example of a method of manufacturing a side panel of the disposable diaper according to the first embodiment.

Fig. 6 is an enlarged plan view (corresponding to Fig. 2) showing a side panel in an extended state of the disposable diaper according to the second embodiment of the present invention.

Fig. 7 is a cross-sectional view in the main body width direction (corresponding to Fig. 3) in a state in which the side sheets included in the disposable diaper according to the second embodiment are contracted.

Fig. 8 is a view showing a state in which the side sheets of the disposable diaper according to the third embodiment are shrunk. The body width direction cross-sectional view (corresponding to the figure of Figure 3).

FIG. 9 is a cross-sectional view in the width direction of the main body in a state in which the side sheets included in the disposable diaper according to the fourth embodiment are contracted (corresponding to FIG. 3 ).

Fig. 10 is a cross-sectional view in the width direction of the main body in a state in which the side sheets provided in the disposable diaper according to the fifth embodiment are contracted (corresponding to Fig. 3).

The present invention relates to a disposable diaper having improved wearability.

Hereinafter, the present invention will be described based on a preferred first embodiment with reference to the drawings.

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 a vertically long absorbent body 2 including a front sheet 21 disposed on the opposite side of the skin. a back sheet 22 disposed on the non-skin facing surface side, and an absorber 23 disposed between the front sheet 21 and the back sheet 22; and a stretchable side sheet 3 attached to the absorbent body 2 The fixing portions 41 of the fastening tape 4 provided on the outer end portion 3a of the front side portion 3a of the side panel 3 are engaged with the non-skin facing surface of the absorbent body 2 along both side portions 2S and 2S in the longitudinal direction of the main body 3; And wearing it.

As shown in Fig. 1, the diaper 1 is formed to be bilaterally symmetrical with respect to a center line CL extending in the longitudinal direction of the absorbent body 2. Therefore, the configuration of the side sheets 3 and 3, the laminated state of the side sheet 24, and the like, and the joint form with the absorbent body 2 are mainly described by taking the left side of FIG. 1 as an example. The same is true.

As will be specifically described for the diaper 1A, as shown in Fig. 1, the absorbent body 2 of the diaper 1A has a vertically long rectangular shape and is divided into a ventral side A on the ventral side of the wearer when worn, and a wearer. The back side B of the back side and the lower part C of the crotch portion.

The longitudinal direction of the diaper 1A is continued from the ventral portion A through the crotch portion C to the Y direction in the figure of the back side portion B, and is the same direction as the longitudinal direction of the absorbent body 2. The body width direction of the diaper 1A is the X direction in the figure orthogonal to the Y direction, and the width of the absorbent body 2 The direction is the same direction. In the following description, the direction of the main body of the diaper or the direction of the diaper constituent member corresponding to the longitudinal direction of the diaper body is also simply referred to as the Y direction, and the width direction of the diaper or the constituent members of the diaper and the width direction of the diaper body are also referred to. The corresponding direction is simply referred to as the X direction. Further, the skin facing surface (inner surface) of the diaper or the diaper is attached to the skin side of the wearer when worn, and the non-skin opposing surface (outer surface) of the diaper or the diaper constituent member is worn. It faces the opposite side of the skin of the wearer.

As will be described in detail with respect to the absorbent main body 2, as shown in Figs. 1 and 3, the absorbent main body 2 includes a liquid permeable front sheet 21, a liquid impervious or liquid impervious (including water repellency) back surface. The sheet 22 and the liquid retaining absorbent body 23 interposed between the two sheets 21 and 22. As shown in FIG. 1, the front sheet 21 and the back sheet 22 cover the entire surface of the skin contact surface of the absorbent body 23 and the entire surface of the non-skin contact surface, and are extended from the periphery of the absorber 23 to be extended. The portion is fixed by being melted by an adhesive such as hot melt or heat sealing. The front sheet 21 is the same length as the back sheet 22 in the main body longitudinal direction (Y direction), but is formed shorter than the back sheet 22 in the main body width direction (X direction) as shown in FIG. The shape of the back sheet 22 is formed in the same shape as that of the absorbent body 2. Further, as shown in FIG. 3, the back sheet 22 includes a leakage preventing sheet 22a containing liquid impermeability or liquid impermeability (including water repellency), and bonded to the leakage preventing sheet 22a via the outer layer of the adhesive layer 61. A composite sheet of non-woven fabric 22b that is not facing the skin side. The outer-layer non-woven fabric 22b has the same planar shape as the absorbent main body 2, and the leakage-preventing sheet 22a has the same planar shape as the outer layer non-woven fabric 22b except that the width in the X direction is slightly smaller as shown in FIG.

Further, the absorbent body 2 includes a side sheet 24 disposed on both side portions 2S and 2S of the absorbent body 2 in the Y direction. As shown in FIG. 1 and FIG. 3, the side sheet 24 is the skin contact surface side of the front sheet 21, and passes through the fixing portion 27 extending in the longitudinal direction (Y direction) of the body over the side along the Y direction. 2S is fully fixed. The fixing portion 27 is attached to the diaper 1A, as shown in Fig. 3, on the inner surface (P side in Fig. 3) of the portion of the back sheet 22 which extends outward from the front sheet 21 in the X direction, and On the inner surface of the side panel 3 (on the P side in Fig. 3), by each A known method is applied by applying an adhesive or by melt-processing together by various known methods, and is disposed over the entire length of the absorbent body 2. The end portion of the side sheet 24 in the X direction (near the diaper center line CL extending in the longitudinal direction of the main body) becomes a free end, and is a portion of the side sheet 24 which is outwardly extended from the fixing portion 27 in the X direction. The gusset portion is formed on the side portion 2S of the absorbent body 2 in the Y direction by being joined to the back sheet 22.

As shown in FIG. 3, the side sheet 24 includes a sheet of liquid-impermeable material, and the side portions 24I and 24O of the sheet along the longitudinal direction of the sheet are folded toward the non-skin opposing side of the sheet. It is formed into 2 layers. Specifically, the side portion 24I on the inner side in the X direction (the diaper center line CL side extending in the longitudinal direction of the main body) is opposite to the non-skin opposing side (outer surface side) of the sheet (the Q side in Fig. 3). Folded to the position of the fixing portion 27, a plurality of three-dimensional pleat forming elastics fixed in the longitudinal direction (Y direction) in the longitudinal direction (Y direction) are disposed near the top of the folded portion between the folded sheets of the lower portion C Member 25. Further, the end portion 24O on the outer side in the X direction is folded back to the position of the fixing portion 27 on the non-skin opposing surface side (outer surface side) of the sheet (the Q side in Fig. 3), and is reversed at the lower portion C of the crotch. In the vicinity of the top of the folded-back sheet, a plurality of leg-pleat-forming elastic members 26 that are stretched in the longitudinal direction (Y direction) are fixed. Further, the side sheet 24 is intermittently disposed between the refolded sheets in a region other than the region where the three-dimensional gather forming elastic member 25 is disposed and the region in which the leg gather forming elastic members 26 are disposed. A plurality of fused portions (not shown) are joined and integrated. The fused portion (not shown) can be formed using, for example, a heat seal, an ultrasonic seal, a high-frequency seal, or a combination of two or more thereof.

When the side sheet 24 formed as described above is worn, in the crotch portion C, by the contraction force of the elastic member 25 for forming the three-dimensional pleats, the relatively fixed portion 27 of the side sheet 24 is further in the body width direction (X The inner side of the direction (near the center line CL) becomes a three-dimensional wrinkle. Specifically, in the lower portion C of the crotch, the top portion of the side portion 24 that is closer to the inner side in the X direction is separated from the top sheet 21 to form a three-dimensional gather. At the same time, by the contraction force of the elastic member 26 for forming the leg gathers, the more fixed portion 27 of the side sheet 24 is further outward in the X direction. The square side becomes a leg fold.

As shown in Fig. 1, in the diaper 1A, the side sheets 3 and 3 are attached so that the both side portions 2S and S of the absorbent main body 2 of the back side portion B protrude outward in the X direction. Further, at the front end portion 3a of the side panel 3, the fastening tape 4 having the fixing portion 41 is provided to extend outward from the front end portion 3a in the X direction. Thus, the diaper 1A is a so-called unfolding type disposable diaper provided with the side sheets 3, 3 to which the fastening tape 4 is attached.

When the attachment of the side panel 3 to the absorbent body 2 is described in detail, the end portion 3d of the side panel 3 on the side of the absorbent body 2 is sandwiched between the side sheet 24 and the back sheet 22, that is, the side sheet 24. The non-skin contact surface side and the skin contact surface side of the back surface sheet 22 are sandwiched between the two sheets and fixed to the absorbent body 2.

As shown in FIG. 2 and FIG. 3, the side panel 3 comprises: two sheets (side sheet) 31, 32; a plurality of elastic members 33, which are fixed between the two sheets 31, 32 and along X a direction extending; a body side adhesive layer 35 which fixes an end portion side of the plurality of elastic members 33 on the side of the absorbent body 2 and extends in the Y direction; and a front end side adhesive layer 36 which fixes the side sheet 3 of the elastic member 33 The edge portion 3 on the side of the front end portion 3a extends in the Y direction; and the side panel 3 is fixed to the two sheets 31 by the body side adhesive layer 35 and the front end side adhesive layer 36. Formed between 32. The details will be described below. In the diaper 1A, the side panel 3 has a rectangular shape in a state of being spread in a planar shape as shown in Fig. 2 . Further, as shown in Figs. 4(a) and 4(b), the side sheets 3 are disposed between the two sheets 31 and 32 having a rectangular shape which are not woven, and are fixed in a plurality of elastic members in a state of being elongated in the X direction. Formed by 33. The elastic members 33 in the extended state are arranged at substantially equal intervals in the Y direction.

Further, as shown in Figs. 4(a) and 4(b), the side panel 3 includes two sheets 31 and 32, an elastic member 33, and a body side on the side of the end portion on the side of the absorbent body 2 on which the elastic member 33 is fixed. The agent layer 35 and the end-side adhesive layer 36 on the end side of the front end portion 3a side of the side sheet 3 of the elastic member 33 are further disposed on the body side adhesive layer 35 and the front end side adhesive layer 36. A plurality of intermediate fixing portions 37 are formed between the two sheets 31 and 32 and extending in the Y direction. Here, the front end portion 3a of the side panel 3 refers to the end portion of the side panel 3 opposite to the end portion 3d on the side of the absorbent body 2.

The intermediate fixing portion 37 serves as an adhesive layer in the diaper 1A. The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37 are formed to extend in the Y direction of the side sheet 3. The intermediate fixing portion 37 is provided in a plurality of strips between the main body side adhesive layer 35 and the front end side adhesive layer 36, that is, the intermediate portion 30. As shown in FIGS. 2 and 4(a), the width of the intermediate fixing portion 37 is smaller than the width of any of the two adhesive layers 35, 36, and in the diaper 1A, in the X direction in the intermediate portion 30. A plurality of strips are intermittently formed at equal intervals.

As shown in Fig. 4 (a), the side sheets 3 of the diaper 1A are arranged in a rectangular shape in a non-woven fabric, and the elastic members 33 are stretched in the Y direction at equal intervals in the Y direction. Between 32, a plurality of elastic members 33 are formed by fixing the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37 between the two sheets 31 and 32. In the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37, as shown in FIG. 4(a), a plurality of elastic members 33 are passed through an adhesive constituting each of the adhesive layers 35, 36, and 37. The stretched state is fixed between the two sheets 31, 32, and the two sheets 31, 32 are directly joined to each other via an adhesive constituting each of the adhesive layers 35, 36, 37 at a portion where the elastic member 33 is not interposed. Further, as shown in FIG. 4(a), in the extending direction of the side panel 3, between the main body side adhesive layer 35 and the intermediate fixing portion 37 adjacent thereto, the adjacent intermediate fixing portions 37, and the front end A non-adjacent region 38 in which an adhesive is not disposed is formed between the side adhesive layer 36 and the intermediate fixing portion 37 adjacent thereto. In the diaper 1A of the first embodiment, the direction in which the side sheets 3 are extended coincides with the direction of the diaper X.

The main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37 are each crossed with a plurality of (more preferably three or more) elastic members 33 extending in the X direction, and the entire length of the side sheets 3 in the Y direction. It extends in the Y direction.

Similarly, the non-adjacent region 38 intersects with all of the plurality of (more preferably three or more) elastic members 33 extending in the X direction, and extends in the Y direction over the entire length of the side sheet 3 in the Y direction. Stretch.

The width of the main body side adhesive layer 35 or the front end side adhesive layer 36 is preferably 1.5 mm or more and 15 mm or less, and more preferably 3 mm or more and 12 mm or less.

As described above, the width of each of the intermediate fixing portions 37 is smaller than the width of any of the two adhesive layers 35 and 36, preferably 0.3 mm or more and 1.5 mm or less, and more preferably 0.5 mm or more and 1.2 mm or less. .

Further, the width of each of the non-adjacent regions 38 is preferably 2 mm or more and 6 mm or less, and more preferably 3 mm or more and 5 mm or less.

In the side panel 3 formed as described above, as shown in FIG. 4(b), in the natural state, the body-side adhesive layer 35 and the front-end side adhesive layer 36 are formed by the contraction force of the plurality of elastic members 33. Between the crease regions GT including the hollow creases in which the elastic members 33 are not fixed to the sheets 31, 32 are formed. The creases are also formed between the intermediate fixing portions 37 adjacent in the X direction and extend in a direction crossing the plurality of elastic members 33. Specifically, in the side panel 3 of the diaper 1A, the elastic member 33 is fixed to the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37 in an extended state, and the elastic member 33 contracts naturally. In the state, as shown in FIG. 4(b), on the both sides of the side panel 3, a plurality of hollow creases in which the elastic members 33 are not fixed to the sheets 31, 32 are formed. Each of the creases is formed to extend in the Y direction so as to intersect the plurality of elastic members 33. As will be described in detail, as shown in FIG. 4(b), the creases formed on the side panel 3 are formed in the intermediate portion 30, and the two sheets 31, 32 are not fixed to the elastic member 33 by the contraction of the elastic member 33. The non-adjacent regions 38 of the hollow portions of the sheets 31 and 32 are convexly bulged in a direction away from the elastic member 33, and in the intermediate adhesive layer 37, they are concave toward the elastic member 33. Former and have a concave-convex shape. Such wrinkles will not completely disappear under the wearing condition of the diaper. In particular, in the diaper 1A, since the intermediate fixing portions 37 are disposed at equal intervals in the X direction in the intermediate portion 30, the height of the two sheets 31 and 32 bulging from the elastic members 33 in the respective non-adjacent regions 38 is substantially The same, and the two sides of the pleat area GT formed on the side panel 3 are respectively creased on the side panel 3 The height in the thickness direction is approximately the same.

Further, as shown in FIG. 4(b), the portions of the side-side adhesive layer 35 and the front-side adhesive layer 36 of the side panel 3 are also contracted by the elastic member 33 on both sides of the side panel 3. A concavo-convex shape is formed, and a plurality of creases extending in the Y direction are formed. However, as described above, the main body side adhesive layer 35 and the front end side adhesive layer 36 fix the elastic member 33 between the two sheets 31 and 32, and do not become hollow wrinkles. Further, in the main body side adhesive layer 35 and the front end side adhesive layer 36, the shrinkage of the elastic member 33 is restricted, so that the unevenness of the two adhesive layers 35, 36 in the thickness direction of the side sheet 3 is smaller than that of the intermediate portion 30. The height of the creases in the same direction. Further, in the regions of the main body side adhesive layer 35 and the front end side adhesive layer 36, the stretchability is smaller than that of the intermediate portion.

A fastening tape 4 is provided on the outer end portion 3a of the side panel 3 on the outer side in the width direction of the body. When the fastening tape 4 is described in detail, the fastening tape 4 includes a tape substrate 42 and a fixing portion 41 having a plurality of engaging projections on the outer side in the X direction of the tape substrate 42. As shown in Fig. 2, the fastening tape 4 of the diaper 1A has a rectangular shape in an unfolded state. The fastening tape 4 is formed by fixing the fixing portion 41 to the outer side in the X direction of the tape substrate sheet 42 formed in the same shape as the plan view of the fastening tape 4 . The fastening tape 4 is bonded to the outer surface (the Q side in Fig. 3) of the front end portion 3a of the side panel 3 via the tape bonding adhesive layer 63 as shown in Fig. 3, as shown in Fig. 3 . The tape bonding adhesive layer 63 is formed in the X direction substantially in conformity with the width of the sealing region 60, and is continuously formed over the entire length of the fastening tape 4 in the Y direction. The adhesive tape 4 thus joined is folded back toward the skin facing side (inner surface side) (P side in FIG. 3) of the side panel 3 before use of the diaper 1A, and is used at the time of use. Further, a non-skin opposing surface (outer surface) of the ventral side portion A of the diaper 1A is provided with a fastening sheet 5 for fixing the fixing portion 41 of the fastening tape 4.

The attachment of the side panel 3 to which the fastening tape 4 is fixed to the side portion 2S of the absorbent body 2 will be described.

In the disposable diaper according to the present invention, the outer side edge portion 2S1 of the absorbent main body 2 in the longitudinal direction of the main body is located on the pleat region GT of the side panel 3 in plan view, and the first embodiment is In the diaper 1A, the X-direction outer side edge portion 24S1 of the side sheet 24 in the Y direction is placed on the wrinkle region GT of the side panel 3 including the hollow creases in plan view. As described above, in the diaper 1A, the outer side edge portion 2S1 of the absorbent main body 2 is the outer side edge portion 24S1 of the side sheet member 24. In addition, the outer side edge portion 2S1 of the absorbent main body 2 is a portion located in the side portion 2S of the absorbent body 2 in the longitudinal direction in the X direction.

Hereinafter, as described above, as shown in FIG. 1, the diaper 1A is disposed on the back side portion B, and the side panels 3 and 3 which are stretchable are disposed on the both side portions 2S and 2S of the absorbent main body 2, respectively. Further, the end portion 3d of the side panel 3 is fixed to the absorbent body 2 by being sandwiched between the side sheet 24 and the back sheet 22. Further, the side sheet 24 is attached to the diaper 1A, and as shown in FIG. 1 and FIG. 3, the fixing portion 27 disposed over the entire length of the absorbent body 2 is disposed over the entire length of the absorbent body 2. The skin contacting surface side of the front sheet 21 of the main body 2 and the inner surface of the back sheet 22 of the absorbent main body 2 extending from the front sheet 21 to the outside in the X direction (P side in FIG. 3) The upper surface of the upper and side panels 3 (the P side in Fig. 3). The diaper 1A is a region in which the side sheets 3 are disposed on the back side portion B, and the side sheet members 24 are fixed to the sheets 31 constituting the side sheets 3 via the fixing portions 27 as shown in FIG. 3, and are continuous in the longitudinal direction of the body. The adhesive (the adhesive layer for connection 62) is formed by being fixed to a portion of the back sheet 22 which is extended outward in the X direction from the side edge of the front sheet 21. Thus, in the side panel 3 fixed to the both side portions 2S, 2S of the absorbent body 2, the X-direction outer side edge portion 24S1 of the side sheet 24 and the side panel 3 contain the wrinkle region of the hollow crease in plan view. The GT is placed in an overlapping manner, and one of the pleat regions GT is covered by the X-direction outer side edge portion 24S1 of the side sheet 24 in the non-joining state.

As shown in FIG. 3, the area (S2) of the overlapping region T of the side sheet 24 and the pleated region GT in the natural state in which the side panel is contracted is relative to the total area (S1) of the pleated region GT of the side panel 3 The ratio (S2/S1) is preferable in view of the stretchability of the region of the body side adhesive layer 35 of the side sheet 3 to prevent sticking to the skin or to prevent the side sheet from sticking to the skin. It is 1/8 or more, more preferably 1/5 or more, and is preferably 2/3 or less, further preferably 1/2 or less, and more specifically, preferably 1/8 or more and 2/3 or less. And further preferably 1/5 Up and 1/2 or less. In addition, the total area (S1) of the pleated area GT of the side panel 3 refers to the area when the pleat area GT of the side panel 3 in the natural state in which the side panel 3 is contracted in a plan view, and the area of the overlapping area T (S2) The area when the side sheet 24 and the overlapping region T (see FIG. 3) of the pleat region GT in the natural state in which the side sheet 3 is contracted are viewed from above.

The diaper 1A is a region other than the region where the side panel 3 is disposed, the crotch portion C and the ventral portion A of the back side portion B, and the side sheet member 24 is fixed to the front portion via the fixing portion 27 as shown in Fig. 1 . A portion of the back sheet 22 whose side edge of the sheet 21 extends outward in the X direction is further fixed to the side edge of the front sheet 21 via a continuous adhesive (attachment adhesive layer 62) in the longitudinal direction of the body. It is formed by extending a portion of the back sheet 22 which is outward in the X direction. The fixing portion 27 and the bonding adhesive layer 62 are formed over substantially the entire length of the absorbent body 2 .

Further, the diaper 1A is attached to both end portions of the absorbent body 2 in the Y direction, that is, a portion of the back side portion B and a portion of the front side portion A, and the side sheet member 24 passes through the adhesive layer 64 as shown in FIG. It is fixed to the front sheet 21. As shown in FIG. 3, the subsequent agent layer 64 is provided on the inner side (the center line CL side) in the X direction from the fixing portion 27, and is provided on one of the front side portion A and the back side portion B, and is not provided on the other hand. In the lower part of C.

When the wearer wears the disposable diaper 1A of the first embodiment, the adhesive tape 4 is unwound from the side panel 3, and the adhesive tape 4 is stretched by hand to stretch the side panel 3, and the adhesive tape 4 is stretched. The fixing portion 41 is pressed against the buckle sheet 5 to be fixed.

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

As the front sheet 21, the back sheet 22, and the absorber 23 constituting the absorbent body 2, those previously used for absorbent articles such as disposable diapers and menstrual napkins can be used without particular limitation. For example, as the front sheet 21, a hydrophilic and liquid permeable non-woven fabric, a three-dimensional apertured film, or the like can be used. As the back surface 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 comprise non-woven fabrics using various methods (for example, hot air non-woven fabric, spunbonded non-woven fabric). , water needle non-woven fabric, needle-rolled non-woven fabric, etc.). Moreover, as the absorber 23, it can be used to contain water permeable The thin paper or non-woven fabric core material is coated with an aggregate of fibers such as pulp fibers (may also be a non-woven fabric) or an absorbent core obtained by holding the water-absorbent polymer particles therein. As the side sheet 24 constituting the three-dimensional gathers and the leg gathers, a laminated sheet of a film, a nonwoven fabric, a woven fabric, or the like can be used.

As the sheets (side sheet sheets) 31 and 32 constituting the side sheets 3, various sheets previously used for absorbent articles such as disposable diapers and menstrual napkins can be used without particular limitation. For example, as the sheets 31 and 32, a laminated sheet of a non-woven fabric, a woven fabric, a film, or the like can be used.

The elastic member 33, the three-dimensional gather forming elastic member 25, and the leg gather forming elastic member 26 may be made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, or polystyrene. a filament-like or rope-like elastic member such as a polybutadiene copolymer or a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene. From the viewpoints of the manufacturing cost or the simplification of the manufacturing steps, the plurality of elastic members 33 disposed on one side sheet are preferably of the same type and arranged at the same elongation.

The fixing portion 41 and the tape substrate sheet 42 constituting the fastening tape 4 are generally used without any particular limitation as long as they can be used for an absorbent article such as a disposable diaper. For example, as the fixing unit 41, "Magic Tape (registered trademark)" (manufactured by KURARAY Co., Ltd.), "Quicklon (registered trademark)" (manufactured by YKK), and "Magi Cloth (registered trademark)" (Kanebo Bell-Touch) can be used. Hooking members, etc. in manufacturing). As the tape substrate sheet 42, a synthetic resin such as polyethylene or polypropylene or polyethylene terephthalate, or a composite material containing two or more of these synthetic resins, a nonwoven fabric or the like can be used.

As an adhesive for forming the fixed leakage preventing sheet 22a and the outer layer non-woven fabric 22b, or the adhesive for fixing the main-side adhesive layer 35 of the sheets 31, 32 constituting the side sheets 3, the respective members are fixed. Preferred materials for the intercalation agent include amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate copolymer (EEA), and styrene-butadiene-styrene block. Copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene/butylene-styrene block copolymer (SEBS), styrene- Thermoplastic polymers such as ethylene/propylene-styrene block copolymer (SEPS) and mixtures thereof and the like. The subsequent agent is preferably a hot melt type.

The main body side adhesive layer 35, the front end side adhesive layer 36, the intermediate fixing portion 37, the outer layer adhesive layer 61, the connection adhesive layer 62, the tape connection adhesive layer 63, and the adhesive layer 64 can be formed as follows. That is, after applying the above-mentioned adhesive agent to either or both of the two sheets sandwiched by each of the known methods, the two sheets are superposed and pressurized.

Further, the application pattern of the adhesive forming the adhesive layer is preferably a so-called integral coating using a spray gun, a coating gun or the like as an adhesive coating machine, but a bead gun may be used as the adhesive coating machine. A spiral spray gun, an Ω-shaped spray gun, a transfer roller, or the like is applied in a pattern such as a linear shape, a spiral shape, an Ω shape, or a dot shape.

The side sheet 3 and the side sheet 24 provided in the disposable diaper of the present invention are not limited in any way, and can be produced by any method.

A preferred embodiment of the method for producing the side panel in the disposable diaper will be described by way of an example in which the side panel 3 in the diaper 1A is produced.

Referring to Fig. 5, an example of a preferred manufacturing method of the side sheet 3 will be described. The apparatus 7 for manufacturing a stretchable sheet shown in Fig. 5 includes a pair of wire transporting elongated structures 71 and 71 which are spaced apart from each other. The elastic body winding mechanism 72 is configured to wind the elastic member around the pair of the wire transporting elongated structures and to orient the elastic member in the longitudinal direction of the wire transporting long structural body. (the direction in the R direction) intersects; and the integration mechanism 73 sandwiches the elastic member 33 that is wound around the elastic body winding mechanism 72 and is transported by the wire transporting elongated structure. The strip sheets 31' and 32' are integrated between each other. As the wire transporting elongated structure 71, it is preferable to use an endless belt which has a forward moving portion that moves in the R direction and a reverse conveying portion that moves in the opposite direction to the R direction, and only the forward moving portion and The elastic member 33 is engaged and the elastic member 33 is conveyed 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 move. Further, as the individual wire transporting elongated structure 71, only one such endless conveyor belt may be used. However, as shown in FIG. 5, it is preferable to arrange such an endless conveyor belt in two stages as the respective wire conveyance. The elongated structure 71 is used. When the speed difference is set to the upper and lower conveyor belts, the orientation of the elastic member 33 having a zigzag shape in a plan view can be corrected to the elastic member 33 at the time of winding up the pair of wire transporting elongated structures 71 and 71. After being spaced apart in the direction and having a plurality of parallel alignments, it is fixed between the pair of strip-shaped sheets 31' and 32'. As the wire transporting elongated structure 71, a circular rod-shaped body in which grooves or ridges are spirally formed on the circumferential surface can be used to rotate around the central axis.

In the preferred manufacturing method of the side panel 3, as shown in Fig. 5, 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. The cloth is used to form the body side adhesive layer 35, the front end side adhesive layer 36, and the adhesive 34 of the intermediate fixing portion 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 are stretched therebetween, and the nip rollers 74 will be used as one of the integrated mechanisms 73. These are pressurized from the top and bottom and integrated. Then, the elastic member 33 which is extended to the side is cut by the 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 of the side sheets 3 by an arbitrary cutting mechanism. In this way, the side panels 3 can be continuously produced with high efficiency.

The diaper 1A can be produced by using the above-described continuous body (stretch sheet 3') of the side panel 3, for example, as follows.

Specifically, for example, the diaper 1A can be efficiently produced in the order of the following (1) to (11) using the continuous body (stretchable sheet 3') of the side sheets 3 described above.

(1) a continuous web having a fastening tape 4 having a fixing portion 41 is coated with a continuous web for forming an adhesive for bonding the adhesive layer 63 to sequentially cut into the length of each of the fastening tapes 4, and The stretchable sheet 3' obtained in the above manner was intermittently attached. (2) will buckle the belt 4 reflexed, temporarily fixed to the stretch sheet 3'. (3) The stretch sheets 3' are sequentially cut into the lengths of the respective side sheets 3. (4) In another step, the leakage preventing sheet 22a and the outer layer non-woven fabric 22b are integrated via the outer layer of the adhesive layer 61 to form the back sheet 22. (5) The adhesive for forming the bonding adhesive layer 62 (for bulk connection) is continuously applied to the side portion on the outer side of the back sheet 22. (6) The side sheet 3 to which the fastening tape 4 is attached is fixed to the back sheet continuous body via the bonding adhesive layer 62. (7) The adhesive layer 64 is partially applied to the front sheet continuous body. (8) In order to obtain the side sheet 24, the both sides of the continuous sheet are folded in another step. The elastic member 25 is fixed in an elongated state to the top portion of the reflexed portion by an adhesive, and the elastic member 26 is fixed to the other folded top portion in an extended state by an adhesive. Then, by means of heat sealing or the like, a fusion portion is provided in a region other than the region where the elastic member 25 is disposed and the region where the elastic member 26 is disposed, and is integrated. (9) arranging the absorber 23 intermittently in the flow direction between the continuous sheet continuous body to which the side sheet 3 is fixed and the front sheet continuous body on the back sheet continuous body, and further to the continuous body of the laminated body The side sheet 24 is disposed on the side portion, and the side sheet 24 is fixed to the side portion of the continuous body of the laminated body via the bonding adhesive layer 62 and the adhesive layer 64. (10) Forming a continuum of the diaper 1A, the continuous system forming the diaper 1A forms a fixing portion 27 formed by heat sealing or the like in a continuous body in which the laminated body of the side sheet 24 is fixed, thereby fixing the side sheet 24 Integration. (11) A continuum of the diaper 1A was cut for each product to continuously manufacture the diaper 1A.

In the production method of the disposable diaper, in addition to the side panel 3 obtained in the above manner, the disposable diaper can be manufactured according to a conventionally known method.

Next, the effect of the use of the diaper 1A of the embodiment of the present invention described above will be described.

As shown in Fig. 2 and Fig. 3, in the diaper 1A, the X-direction outer side edge portion 2S1 of the absorbent main body 2 in the Y direction is disposed on the wrinkle region GT of the side panel 3 including the hollow creases. Therefore, by stretching the stretchable side panel 3, the fixing portion 41 of the fastening tape 4 is engaged with the fastening sheet 5 on the side of the abdominal portion A, even if the wearing portion of the side portion 2S of the absorbent body 2 is pressed. High diaper In the state of wearing 1A, the outer side edge portion 2S1 also covers the skin abutting surface side of the region of the body side adhesive layer 35 of the elastic member 33 of the side panel 3, and the body side of the elastic member 33 of the side panel 3 is next. The wrinkles of the agent layer 35 are less likely to adhere to the wearer's skin, or the sheet 31 of the side panel 3 is less likely to adhere to the wearer's skin, and the wearability is improved. In the diaper 1A, the X-direction outer side edge portion 2S1 of the absorbent body 2 corresponds to the X-direction outer side edge portion 24S1 of the side sheet 24, and the outer side edge portion 24S1 is disposed in the side sheet 3 The above-described effects are further exerted on the pleated region GT of the hollow crease.

Further, in the diaper 1A, as shown in FIG. 3, the side sheet 3 has a plurality of intermediate fixing portions 37 between the main body side adhesive layer 35 and the front end side adhesive layer 36, and in the natural state, the intermediate fixing portions 37 are mutually fixed. Hollow creases extending in a direction crossing the elastic member 33 are formed between them, respectively. The height of the ridges in the thickness direction of the side panel 3 is greater than the height of the ridges of the main body side adhesive layer 35 and the front side adhesive layer 36 in the same direction, and thus extends in a direction crossing the elastic member 33. The plurality of hollow creases improve the cushioning property, and the wrinkles of the main body side adhesive layer 35 of the elastic member of the side panel 3 are less likely to adhere to the wearer's skin, and the wearability is further improved. In particular, in the diaper 1A, the wrinkles formed in the wrinkle regions GT of the side sheets 3 are substantially the same in the thickness direction of the side sheets 3, and thus it is easy to further exert the above effects.

Next, a diaper according to a second embodiment of the disposable diaper of the present invention will be described. In the disposable diaper 1B of the second embodiment, the shape of the crease formed in the pleat region GT of the side panel 3 is different from that of the diaper 1A of the first embodiment. The diaper 1B of the second embodiment is 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 description of the diaper 1A of the first embodiment will be appropriately applied to the aspects which are not particularly mentioned.

In the diaper 1B, similarly to the diaper 1A, as shown in FIGS. 6 and 7, the side panel 3 has two sheets 31 fixed in the intermediate portion 30 between the main body side adhesive layer 35 and the front end side adhesive layer 36. 32 includes an intermediate fixing portion 37 of a plurality of adhesive layers extending in the Y direction.

Further, in the diaper 1B, similarly to the diaper 1A, as shown in FIGS. 6 and 7, the end portion 3d of the side panel 3 is fixed to the absorbent body 2 by being sandwiched between the side sheet 24 and the back sheet 22, and is absorbed. The outer side edge portion 2S1 of the main body 2 corresponds to the outer side edge portion 24S1 of the side sheet member 24.

With respect to the intermediate fixing portion 37 constituting the side panel 3 of the diaper 1B, as shown in Fig. 6, the intermediate fixing portions 37 adjacent in the X direction are spaced apart from each other such that the body side adhesive layer 35 side is shorter than the front end side adhesive layer. 36 sides. As shown in FIG. 6, the width of the intermediate fixing portion 37 is smaller than the width of any of the two adhesive layers 35, 36. Specifically, in the diaper 1B, the intermediate portion 30 is divided into the main body side intermediate portion 30b on the side of the main body side adhesive layer 35 and the front end side intermediate portion 30a on the side of the front end side adhesive layer 36 side. In the main body side intermediate portion 30b, a plurality of intermediate fixing portions 37 are intermittently arranged at equal intervals in the X direction, and a plurality of intermediate fixing portions 37 are intermittently arranged at equal intervals in the X direction in the front end side intermediate portion 30a. Intermediate fixing portion 37. Further, as shown in FIG. 6, the intermediate fixing portions 37 disposed adjacent to each other in the X direction disposed on the main body side intermediate portion 30b are shorter than the intermediate fixing portions disposed adjacent to the front end side intermediate portion 30a in the X direction. 37 are separated from each other. Further, the intermediate fixing portions 37 are spaced apart from each other and have the same meaning as the width of the non-adjacent region 38.

In the diaper 1B, the width of the main body side adhesive layer 35 or the front end side adhesive layer 36 is preferably 1.5 mm or more and 15 mm or less, and more preferably 3 mm or more and 12 mm or less.

As described above, the width of each of the intermediate fixing portions 37 is smaller than the width of any of the two adhesive layers 35, 36, and in the diaper 1B, it is preferably 0.3 mm or more and 1.5 mm or less, and further preferably 0.5 mm. Above and 1.2mm or less.

In the diaper 1B, the intermediate fixing portions 37 disposed adjacent to each other in the X direction in the main body side intermediate portion 30b are spaced apart from each other (the width of each non-adjacent region 38) is preferably 2 mm or more and 4 mm or less, and further preferably 2.5. Above mm and below 3.8mm.

Further, in the diaper 1B, the interval between the intermediate fixing portions 37 adjacent to each other in the X direction in the distal end side intermediate portion 30b (the width of each non-adjacent region 38) is preferably 3 mm or more and 6 mm or less, and further preferably It is 3.5 mm or more and 5.5 mm or less.

Similarly to the diaper 1A, the side panel 3 of the diaper 1B is formed in such a manner that the elastic members 33 which are stretched in the X direction are disposed at equal intervals in the Y direction and are disposed in a rectangular shape of the two sheets 31 which are not woven. Between 32 and 32, a plurality of elastic members 33 are fixed between the two sheets 31 and 32 by the main body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate fixing portion 37.

In the side panel 3 of the diaper 1B formed as described above, as shown in Fig. 7, in the natural state, the body-side adhesive layer 35 and the front-end side adhesive layer 36 are formed by the contraction force of the plurality of elastic members 33. Between the crease regions GT including the hollow creases in which the elastic members 33 are not fixed to the sheets 31, 32, the crease regions GT formed in the side panels 3 can be divided into the creases on the side of the body side adhesive layer 35, and the height of the creases is relatively low. The low pleat region GTb and the high pleat region GTa at which the height of the crease on the side of the front end side adhesive layer 36 is relatively high. The height of the crease refers to the height from the skin abutting surface side to the non-skin abutting surface side in the natural state in which the elastic member 33 is contracted. Specifically, in the side panel 3 of the diaper 1B, the elastic member 33 is fixed to the main body side adhesive layer 35, the distal end side adhesive layer 36, and the intermediate fixing portion 37 in an extended state, and the elastic member 33 is contracted in a natural state. Next, on the both sides of the side panel 3, a plurality of hollow creases in which the elastic members 33 are not fixed to the sheets 31, 32 are formed. Each of the creases is formed to extend in the Y direction so as to intersect the plurality of elastic members 33. As will be described in detail, as shown in FIG. 7, the pleats formed on the side panels 3 are formed in the intermediate portion 30, and the two sheets 31, 32 are not fixed to the sheet by the elastic members 33 by the contraction of the elastic members 33. Each of the non-adjacent regions 38 of the hollow portions 31 and 32 is convexly bulged in a direction away from the elastic member 33, and is formed in a concave shape toward the elastic member 33 in each intermediate adhesive layer 37, and has Concave shape. In particular, in the diaper 1B, the intermediate portion 30 is divided into the main body side intermediate portion 30b and the distal end side intermediate portion 30a, and the intermediate fixing portions 37 which are evenly disposed in the main body side intermediate portion 30b are spaced apart from each other and are disposed evenly in the middle of the front end side. The intermediate fixing portions 37 of the regions 30a are spaced apart from each other. Therefore, the height at which the two sheets 31 and 32 bulge from the elastic member 33 in each of the non-adjacent regions 38, that is, the creases formed on the both sides of the side panel 3 are respectively applied to the thickness of the side panel 3 The height of the pleat area on the side of the main body side intermediate portion 30b becomes lower than that of the pleated area on the side of the front end side intermediate portion 30a. In the diaper 1B, the wrinkle region on the main body side intermediate portion 30b side becomes the low wrinkle region GTb, and the wrinkle region on the distal end side intermediate region 30a side becomes the high wrinkle region GTa, and the wrinkle region GT can be divided into the low wrinkle region GTb and the high wrinkle Area GTa. The height (h1) of the wrinkle in the high-pleated region is 0.5 mm or more, preferably 1 mm or more, the upper limit is 3 mm or less, preferably 9 mm or less, and the height (h2) of the wrinkle in the low wrinkle region is 0.1 mm or more, preferably The absolute value Δh(h1-h2) of the difference between the height of the high-pleated area and the low-pleated area is 8 mm or less, preferably 0.5 mm or more, and the upper limit is 5 mm or less, preferably 3 mm or less. When Δh is within this range, the thickness of the side sheet is equal to or less than the thickness of the side sheet, and even when the cushioning property of the crease disappears or is small, the edge portion of the side sheet is accommodated in the low pleat region. Premise, but not easy to produce a step, the skin feels good.

The attachment of the side panel 3 to which the fastening tape 4 is fixed to the side portion 2S of the absorbent body 2 will be described.

The diaper 1B according to the second embodiment of the present invention is disposed on the side panel 3 in the X-direction outer side edge portion 24S1 of the side sheet 24 corresponding to the outer side edge portion 2S1 of the absorbent main body 2 in the Y direction. The low pleat area GTb of the pleated area GT of the hollow crease is included. In other words, in the side panel 3 fixed to the both side portions 2S, 2S of the absorbent body 2, in the diaper 1B, the X-direction outer side edge portion 24S1 of the side sheet 24 and the side panel 3 contain hollow folds. The low-pleated regions GTb in the region GT are arranged to overlap each other, and the X-direction outer side edge portion 24S1 of the side sheet 24 in the non-joining state covers one portion of the low-pleated region GTb.

As shown in Fig. 7, with respect to the ratio (S3/S1) of the area (S3) of the low pleat region GTb of the side panel 3 in the natural state in which the side panel 3 is contracted to the total area (S1) of the pleat region GT, From the viewpoint of ensuring the gas permeability and stretchability of the side sheets 3, it is preferably 1/8 or more and 2/3 or less, and more preferably 1/5 or more and 1/2 or less.

Further, in the diaper 1B, the side sheet 24 in a natural state in which the side panels 3 are shrunk The ratio (S2/S1) of the area (S2) of the overlapping region T to the pleated region GT with respect to the total area (S1) of the pleated region GT of the side panel 3 takes into consideration the body-side adhesive layer 35 of the side panel 3. The stretchability of the region is preferably 1/8 or more, more preferably 1/5 or more, and more preferably 2/, from the viewpoint of preventing sticking to the skin or preventing adhesion of the side sheet to the skin. 3 or less is more preferably 1/2 or less, and more specifically, it is preferably 1/8 or more and 2/3 or less, and more preferably 1/5 or more and 1/2 or less. In addition, the total area (S1) of the pleated area GT of the side panel 3 refers to the area when the pleat area GT of the side panel 3 in the natural state in which the side panel 3 is contracted in a plan view, and the area (S3) of the low pleat area GTb is The area in which the low pleat region GTb of the side panel 3 in the natural state in which the side panel 3 is contracted is viewed in a plan view, and the area (S2) of the overlap region T refers to the natural state in which the side panel 24 is contracted and the side panel 3 is contracted. The area in the overlapping region T (see FIG. 7) of the pleated region GT.

The effect of the use of the above diaper 1B will be described.

The effect of the diaper 1B will be described with respect to the effect of the diaper 1A. The effect of the diaper 1A is appropriately applied as in the case of the diaper 1A, and the description of the effect of the diaper 1A is appropriately applied.

As shown in Fig. 6 and Fig. 7, in the diaper 1B, the outer side edge portion 24S1 of the side sheet 24 in the X direction in the Y direction is disposed on the low pleat region GTb of the side panel 3 including the pleat region GT of the hollow crease . Therefore, the effect is that the thickness of the low-pleated region GTb is not so thick as to be thicker than the high-pleated region GTa, and the trace of the boundary portion of the X-direction outer side edge portion 24S1 of the side sheet 24 in the Y direction is less likely to adhere to the skin.

The disposable diaper of the present invention is not limited to any of the diapers 1A to 1B of the first to second embodiments described above, and can be appropriately changed. In addition, each of the components of the diapers 1A to 1B of the above-described first to second embodiments can be appropriately combined without departing from the gist of the present invention.

For example, in the diapers 1A to 1B of the above-described first to second embodiments, as shown in FIGS. 3 and 7, the end portions 3d of the side sheets 3 are fixed to the side sheets 24 and the back sheet 22, and are fixed to Absorptive In the main body 2, the outer side edge portion 2S1 of the absorbent main body 2 corresponds to the outer side edge portion 24S1 of the side sheet member 24, but may be a portion other than the outer side edge portion 24S1 of the side sheet member 24. For example, as shown in Figs. 8 to 10, the diaper 1C to 1E of the third to fifth embodiments are fixed to the absorbent body 2, and the end portion 3d of the side panel 3 on the side of the absorbent body 2 is fixed. The non-skin contact surface side of the back sheet 22 of the absorbent main body 2 is fixed to the absorbent body 2 via the adhesive layer 65. As described in detail, in the diaper 1C of the third embodiment shown in FIG. 8, the back sheet 22 has the outer layer non-woven fabric 22b other than the outer side edge portion 22b1 and the side sheet 24 in the longitudinal direction of the main body. The side edge portion 24S1 overlaps in a plan view, and the outer side edge portion 2S1 of the absorbent body 2 corresponds to the outer side edge portion 22b1 of the back surface sheet 22 and the outer side edge portion 24S1 of the side sheet member 24, The outer side edge portions 22b1, 24S1 are located on the pleated region GT of the side panel 3 in plan view. Further, in the diaper 1D of the fourth embodiment shown in Fig. 9, the outer side edge portion 24S1 of the side sheet member 24 has the outer side edge of the outer layer non-woven fabric 22b along the longitudinal direction of the back sheet 22 The portion 22b1 extends further in the X direction, and the outer side edge portion 2S1 of the absorbent main body 2 corresponds to the outer side edge portion 24S1 of the side sheet member 24, and the outer side edge portion 24S1 is located at the wrinkle region of the side sheet 3 in plan view. On the GT. In the diaper 1E of the fifth embodiment shown in Fig. 10, the back sheet 22 has the outer side edge portion 22b1 of the outer layer non-woven fabric 22b in the longitudinal direction of the main body, and the outer side edge portion 24S1 of the side sheet member 24. Further, the outer side edge portion 2S1 of the absorbent body 2 corresponds to the outer side edge portion 22b1 of the back sheet 22, and the outer side edge portion 22b1 is positioned on the pleated region GT of the side sheet 3 in plan view.

Further, in the diapers 1A to 18 of the above-described first to second embodiments, as shown in FIGS. 3 and 7, the X-direction outer side edge portion 24S1 of the side sheet 24 covers the side panel 3 in a non-joining state. One of the pleated regions GT of the hollow creases is included, but the outer side edge portions 24S1 of the side sheets 24 in the Y direction may also partially follow the pleat regions GT of the side panels 3. If it is carried out in this manner, it is possible to prevent the X-direction outer side edge portion 24S1 of the side sheet 24 from being curled due to an unexpected external force. Further, in the case where the outer side edge portion 24S1 is attached to the pleat region GT of the side panel 3, it is preferable that the stretchability of the side panel 3 is not easily hindered. The adhesive agent is applied intermittently at intervals in the Y direction over the wrinkle region GT in the natural state over the entire length of the side sheet 3 in the Y direction.

Further, in the diapers 1A to 1B of the above-described first to second embodiments, as shown in FIGS. 3 and 7, the main body side adhesive layer 35 of the side sheet 3 and the adhesive layer for connection to the back sheet 22 are provided. 62 overlaps in the thickness direction of the diaper, but may overlap with the fixing portion 27 of the side sheet 24, or may overlap with both the bonding adhesive layer 62 and the fixing portion 27. Thus, since the body side adhesive layer 35 is bonded to the absorbent body in this region, the body side adhesive layer 62 does not substantially expand and contract in this region. Thereby, when the side panel 3 is extended, the main body side adhesive layer 62 does not protrude further outward from the X direction outer side edge part 24S1 of the side sheet 24.

Further, in the diapers 1A to 1B of the first to second embodiments described above, as shown in Figs. 4(a) and 4(b), the intermediate fixing portion 37 forming the side sheets 3 serves as an adhesive layer in the Y direction. It is formed by stretching, but it can also be formed by heat sealing or the like. When the intermediate fixing portion 37 is formed by heat sealing or the like, the elastic members 33 which are intermittently arranged in the Y direction are respectively formed with a melting portion, and a plurality of strips are formed in the X direction to extend in the Y direction. The group of melting parts can be.

Further, in the diapers 1A to 1B of the first to second embodiments described above, as shown in FIGS. 2 and 6, the side sheets 3 have a plurality of strips between the main body side adhesive layer 35 and the front end side adhesive layer 36. The intermediate fixing portion 37 may not have the intermediate fixing portion 37. Further, the width of each intermediate fixing portion 37 is substantially uniform, but if the width is smaller than either of the two adhesive layers 35 and 36, it may be uneven. Further, in the diaper 1A of the first embodiment described above, as shown in Fig. 2, the intermediate fixing portions 37 are evenly spaced apart from each other in the intermediate portion 30. In the diaper 1B of the second embodiment, as shown in Fig. 6, The intermediate fixing portions 37 are equally spaced apart from each other in the main body side intermediate portion 30b and the distal end side intermediate portion 30a, but they may be arranged unevenly.

Further, in the diapers 1A to 1B of the above-described first to second embodiments, as shown in FIGS. 3 and 7, the side sheets 24 are folded back and formed into two layers as a whole, but they may not be formed as a whole. Floor. For example, only the portion in which the elastic member 25 for forming the three-dimensional gathers is disposed may be folded into two layers, and the other portions may be one layer.

Further, in the diapers 1A to 1B of the first to second embodiments, as shown in FIGS. 3 and 7, the side sheets 3 are joined to the back sheet of the absorbent body 2 via an adhesive. The inner surface of the 22 (the P side in FIG. 3) and the outer surface of the side sheet 24 (the Q side in FIG. 3), but the side panel 3 may also be bonded to the outer surface of the back sheet 22 of the absorbent body ( In Figure 3, the Q side). For example, the inner surface of the side panel 3 (the P side in FIG. 3) and the outer surface of the back sheet 22 (the Q side in FIG. 3) may be bonded via an adhesive, or may be sealed by heat sealing or ultrasonic wave or the like. The side sheet 24, the back sheet 22, and the side sheets 3 are joined by fusion or pressure bonding.

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

<1>

A disposable diaper comprising: a vertically long absorbent body comprising a front sheet disposed on a facing side of the skin, a back sheet disposed on a non-skin facing side, and a front sheet disposed on the sheet An absorbent body between the back sheets; and a stretchable side sheet attached to both sides of the absorbent body along the longitudinal direction of the body; and disposed at an outer end of the side sheet outside the width direction of the side sheet The fixing portion of the fastening tape is engaged with the non-skin opposing surface of the absorbent body; and the absorbent body comprises side sheets disposed on both sides of the absorbent body along the longitudinal direction of the body; The side panel comprises: two side panel sheets; a plurality of elastic members fixed to the two side panel sheets and extending along the width direction of the body; and a body side adhesive layer fixing the absorption of the plurality of elastic members The end side of the body side and extending along the length direction of the body; and a front end side adhesive layer which fixes the end side of the front side of the side piece of the elastic member and extends along the length direction of the body; and the side film system will Long state of the elastic member by said printer agent layer and the adhesive layer is fixed to the distal end side to side between the two sheets is then formed; In the above-mentioned side panel, in the natural state, between the main body side adhesive layer and the front end side adhesive layer, the elastic member is not fixed to the side piece by the contraction force of the plurality of elastic members. The side panel has a plurality of intermediate fixing portions disposed between the body side adhesive layer and the front end side adhesive layer to fix the two side sheet sheets along the length of the body a direction extending; the creases are formed between the intermediate fixing portions adjacent to each other in the width direction of the body, extending in a direction crossing the plurality of elastic members; and the outer side edges of the absorbent body along the longitudinal direction of the body The portion is located on the pleated region of the side panel in a plan view.

<2>

The disposable diaper according to the above <1>, wherein the intermediate fixing portions adjacent to each other in the width direction of the main body are spaced apart from each other by the side of the main body side adhesive layer side shorter than the front end side adhesive layer side; in a natural state, the diaper is formed The pleat region of the side panel is divided into a low pleat region having a relatively low height of the crease on the side of the main body side adhesive layer side and a high pleat region having a relatively high height of the crease at the side of the front end side adhesive layer side. The outer side edge portion of the absorbent body along the longitudinal direction of the main body is the outer side edge portion of the side sheet, and the outer side edge portion of the side sheet is located at the lower side of the side sheet in plan view. On the pleated area.

<3>

The disposable diaper according to the above <1> or <2>, wherein the pleated region comprises a low pleated region and a high pleated region, and the height of the crease is 0.5 mm or more, preferably 1 mm or more, and 3 mm. Hereinafter, it is preferably 9 mm or less.

<4>

A disposable diaper according to the above <2> or <3>, wherein the above-mentioned low pleat area is above The height of the wrinkles is 0.1 mm or more and 8 mm or less.

<5>

The disposable diaper according to any one of the above aspects, wherein the absolute value Δh of the difference between the height of the high pleat region and the pleat region of the low pleat region is 0.5 mm or more, preferably 1.0 mm or more. Further, it is 5 mm or less, preferably 3 mm or less.

<6>

The disposable diaper according to any one of the above aspects, wherein the outer side edge portion of the absorbent body along the longitudinal direction of the main body is partially joined to the pleat region of the side panel in a plan view.

<7>

The disposable diaper according to any one of the above aspects, wherein the width of the main body side adhesive layer or the front end side adhesive layer is 1.5 mm or more and 15 mm or less, preferably 3 mm or more and 12 mm or less. .

<8>

The disposable diaper according to any one of the above aspects, wherein the width of each of the intermediate fixing portions is smaller than a width of any one of the main body side adhesive layer and the front end side adhesive layer, which is 0.3 It is mm or more and 1.5 mm or less, preferably 0.5 mm or more and 1.2 mm or less.

<9>

The disposable diaper according to any one of the above-mentioned <1> to <8> wherein the height of the pleats of the body side adhesive layer and the front end side adhesive layer in the thickness direction of the side sheets is smaller than the body side The region between the subsequent layer and the front end side adhesive layer, that is, the unevenness of the pleats of the intermediate portion in the same direction.

<10>

The disposable diaper according to any one of the above-mentioned items, wherein the area of the overlapping portion of the side sheet and the wrinkle region in the natural state in which the side sheet is contracted (S2) The ratio (S2/S1) to the total area (S1) of the wrinkle region of the side panel is 1/8 or more, preferably 1/5 or more, and further 2/3 or less, preferably 1/2. the following.

<11>

The disposable diaper according to any one of the above-mentioned <1> to <10>, wherein a non-woven fabric, a woven fabric, a film, or the like is used as the side sheet.

<12>

The disposable diaper according to any one of the above aspects, wherein the outer side portion of the absorbent body in the longitudinal direction is an outer side portion of the side sheet in the longitudinal direction.

<13>

The disposable diaper according to any one of the above aspects, wherein the end portion of the side panel on the absorbent body side is fixed to the absorbent body by being sandwiched between the side sheet and the back sheet. The outer side edge portion of the absorbent body in the longitudinal direction of the main body is an outer side edge portion of the side sheet in the longitudinal direction.

<14>

The disposable diaper according to any one of the above aspects, wherein the end portion of the side panel on the absorbent body side is fixed to the absorbent body on a non-skin contact surface side of the back sheet. The outer side edge portion of the absorbent body in the longitudinal direction is an outer side edge portion of the back surface sheet in the longitudinal direction.

<15>

The disposable diaper according to any one of the above-mentioned items, wherein the side sheet comprises a sheet of liquid-impermeable material, and the sheet is longitudinally directed to the sheet. The non-skin opposite side is folded back to form two layers.

<16>

The disposable diaper according to any one of the above-mentioned <1>, wherein the above-mentioned side sheet is provided at the front end portion of the side panel in the outer side in the width direction of the side panel, and the fastening tape includes a tape substrate. The sheet member and the fixing portion having a plurality of engaging projections on the outer side of the main body width (X) direction of the tape substrate sheet, the adhesive tape having a rectangular shape in an unfolded state, and the adhesive tape The belt base material sheet having the same shape as the plan view is formed by fixing the fixing portion on the outer side in the main body width (X) direction.

<17>

The disposable diaper according to any one of the above-mentioned items, wherein the absorbent body has a longitudinally long rectangular shape and is divided into a ventral side portion on the ventral side of the wearer when worn, and is located in the wearer. The back side of the back side and the lower part of the crotch portion of the wearer's crotch.

<18>

The disposable diaper according to any one of the above aspects, wherein the back sheet comprises a liquid impervious or liquid impervious sheet, and the outer layer is bonded to the outer layer. A composite sheet of non-woven fabric of the outer layer of the non-skin facing side of the leaking sheet.

<19>

A disposable diaper according to any one of the above items <1> to <18> wherein a three-dimensional pleat and a leg gather are formed.

1A‧‧‧Disposable diapers

2S‧‧‧ side

2S1‧‧‧Outside side edge

3‧‧‧ side film

3a‧‧‧ front end

3d‧‧‧End

4‧‧‧Buckle tape

21‧‧‧Front sheet

22‧‧‧ Back sheet

22a‧‧‧Leak-proof sheet

22b‧‧‧Outer non-woven fabric

23‧‧‧Acceptor

24‧‧‧Side sheet

24I‧‧‧ side

24O‧‧‧ side

24S1‧‧‧X direction outer side edge

27‧‧‧ Fixed Department

31‧‧‧Sheet

32‧‧‧Sheet

33‧‧‧Flexible components

35‧‧‧ Body side adhesive layer

36‧‧‧ front-end side adhesive layer

37‧‧‧Intermediate fixation

41‧‧‧ Fixed Department

42‧‧‧With substrate sheet

61‧‧‧ outer layer of adhesive

62‧‧‧Connecting adhesive layer

63‧‧‧With adhesive layer for connection

64‧‧‧ adhesive layer

GT‧‧ pleated area

P‧‧‧ skin opposite side

Q‧‧‧Non-skin opposite side

S1‧‧‧ area

S2‧‧‧ area

T‧‧‧ overlapping area

X‧‧‧ direction

Claims (20)

A disposable diaper comprising: a vertically long absorbent body comprising a front sheet disposed on a facing side of the skin, a back sheet disposed on a non-skin facing side, and a front sheet disposed on the sheet An absorbent body between the back sheets; and a stretchable side sheet attached to both sides of the absorbent body along the longitudinal direction of the body; and disposed at an outer end of the side sheet outside the width direction of the side sheet The fixing portion of the fastening tape is engaged with the non-skin opposing surface of the absorbent body; and the absorbent body comprises side sheets disposed on both sides of the absorbent body along the longitudinal direction of the body; The side panel comprises: two side panel sheets; a plurality of elastic members fixed to the two side panel sheets and extending along the width direction of the body; and a body side adhesive layer fixing the absorption of the plurality of elastic members The end side of the body side and extending along the length direction of the body; and a front end side adhesive layer which fixes the end side of the front side of the side piece of the elastic member and extends along the length direction of the body; and the side film system will The elastic member in the long state is formed by fixing the main body side adhesive layer and the front end side adhesive layer between the two side sheet sheets; and in the side sheet, in the natural state, by the plurality of elastic layers a contraction force of the member is formed between the body side adhesive layer and the front end side adhesive layer to form a wrinkle region including the hollow wrinkle of the elastic member not fixed to the side sheet; the side sheet has a plurality of intermediate fixing And a portion disposed between the body-side adhesive layer and the front-end adhesive layer, and fixing the two side panel sheets and extending along a longitudinal direction of the body; the creases are formed in the body width direction The intermediate fixing portions extend in a direction crossing the plurality of elastic members; The outer side edge portion of the absorbent body along the longitudinal direction of the main body is located on the pleat region of the side panel in plan view. The disposable diaper according to claim 1, wherein the pleated region comprises a low pleated region and a high pleated region, and the height of the crease is 0.5 mm or more and 3 mm or less in the high pleat region. The disposable diaper according to claim 1, wherein the intermediate fixing portions adjacent to each other in the width direction of the main body are spaced apart from each other by the side of the main body side adhesive layer side shorter than the front end side adhesive layer side; in a natural state, formed in The pleated region of the side panel is divided into a low pleat region having a relatively low height of the crease on the side of the main body side adhesive layer and a high pleat region having a relatively high height of the crease on the front side adhesive layer side; The outer side edge portion of the absorbent body in the longitudinal direction of the main body is the outer side edge portion of the side sheet, and the outer side edge portion of the side sheet is located at the lower wrinkle of the side sheet in plan view. On the area. The disposable diaper according to claim 2 or 3, wherein the height of the crease is 0.5 mm or more and 3 mm or less in the high pleat area. The disposable diaper according to claim 2, wherein the height of the wrinkles in the low-pleated region is 0.1 mm or more and 8 mm or less. The disposable diaper according to claim 2 or 3, wherein an absolute value of a height difference between the high pleat region and the low pleat region is 0.5 mm or more and 5 mm or less. The disposable diaper according to any one of claims 1 to 3, wherein the outer side edge portion of the absorbent body along the longitudinal direction of the body is partially followed by the pleat region of the side panel in a plan view. The disposable diaper according to any one of claims 1 to 3, wherein the width of the body side adhesive layer or the front end side adhesive layer is 1.5 mm or more and 15 mm or less. The disposable diaper according to any one of claims 1 to 3, wherein a width of each of the intermediate fixing portions is smaller than a width of any one of the main body side adhesive layer and the front end side adhesive layer, and is 0.3 mm or more. 1.5mm or less. The disposable diaper according to any one of claims 1 to 3, wherein a thickness of the wrinkle of the main body side adhesive layer and the front end side adhesive layer in the thickness direction of the side sheet is smaller than the main body side adhesive layer The area between the front end side adhesive layer and the front side side adhesive layer is the height of the concavities and convexities in the same direction. The disposable diaper according to any one of claims 1 to 3, wherein an area (S2) of an overlapping region of the side sheet and the pleated region in a natural state in which the side panel is contracted is opposite to the pleat of the side panel The ratio (S2/S1) of the total area (S1) of the area is 1/8 or more and 2/3 or less. A disposable diaper according to any one of claims 1 to 3, wherein a laminated sheet of a non-woven fabric, a woven fabric, a film or the like is used as the side panel sheet. The disposable diaper according to any one of claims 1 to 3, wherein the outer side portion of the absorbent body in the longitudinal direction is the outer side portion of the side sheet in the longitudinal direction. The disposable diaper according to any one of claims 1 to 3, wherein the end portion of the side panel on the absorbent body side is fixed to the absorbent body by the side sheet and the back sheet, and the absorption The outer side edge portion of the main body along the longitudinal direction of the main body is an outer side edge portion of the side sheet in the longitudinal direction. The disposable diaper according to any one of claims 1 to 3, wherein an end portion of the side panel on the absorbent body side is fixed to the absorbent body on a non-skin contact surface side of the back sheet, the absorbent The outer side edge portion of the main body in the longitudinal direction is an outer side edge portion of the back surface sheet in the longitudinal direction. The disposable diaper according to any one of claims 1 to 3, wherein the side sheet comprises a sheet of liquid impervious material, the sides of the sheet being oriented in the longitudinal direction toward the sheet The non-skin-facing side of the material is folded back to form two layers. The disposable diaper according to any one of claims 1 to 3, wherein the adhesive tape is provided at an end portion of the side panel in the outer side in the width direction of the side panel, the adhesive tape comprising a substrate sheet, and the tape base The fixing member having a plurality of engaging projections on the outer side in the main body width direction of the material sheet, and the fastening tape has a rectangular shape in an unfolded state, and the belt is formed in the same shape as the plan view of the fastening tape. The fixing portion is formed by fixing the fixing portion on the outer side in the main body width direction of the base material sheet. The disposable diaper according to any one of claims 1 to 3, wherein the absorbent body has a longitudinally long rectangular shape and is divided into a ventral side portion on the ventral side of the wearer when worn, on the back side of the wearer. The back side and the lower part of the crotch of the wearer's crotch. The disposable diaper according to any one of claims 1 to 3, wherein the back sheet is a liquid-impermeable or liquid-impermeable leak-proof sheet, and is bonded to the leak-proof sheet via an outer layer of an adhesive layer. A non-woven composite sheet that is not on the opposite side of the skin. A disposable diaper according to any one of claims 1 to 3, wherein three-dimensional pleats and leg pleats are formed.