TWI604833B - Abandoned diapers - Google Patents

Description

Disposable diaper

This invention relates to an unfolded disposable diaper.

Since the prior art, disposable diapers having side panels extending from the side edges of the absorbent body are known. As a disposable diaper having a side panel (a stretchable side panel), the applicant has previously proposed a disposable diaper in which a non-elastic portion is provided on the side portion of the stretchable side panel in the longitudinal direction of the body, and the non-elastic portion is not provided. The elastic member constituting the stretchable side panel and the sheet material constituting the side panel (the stretchable side panel) are joined (see Patent Document 1). According to the diaper of the patent document 1, since the said elastic member and the said plate material are not joined in the said non-expanding part, the flexibility of the side part of the outer side of a stretchable side sheet is improved, and the fixation stability of the said elastic member is also improved.

Further, as a disposable diaper having a side panel (stretchable side panel), the applicant has previously proposed a disposable diaper in which a first fixing portion is formed to be spaced apart from the main body width direction, and a velcro belt is fixed. a hook tape and a sheet substrate constituting the fastening tape; and a second fixing portion to which the fastening tape and the elastic waist plate are fixed; wherein the second fixing portion has a lower edge in the longitudinal direction of the body than the body length of the first fixing portion The lower end edge of the direction is located above, and the edge of the sheet substrate constituting the fastening tape is separated from the lower end in the longitudinal direction of the body (refer to Patent Document 2). According to the diaper described in Patent Document 2, the hook tape constituting the fastening tape is less likely to be peeled off from the sheet substrate constituting the fastening tape by the arrangement relationship between the first fixing portion and the second fixing portion. Feeling improved.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2012-135446

Patent Document 2: Japanese Patent Laid-Open Publication No. 2012-120663

However, in the diaper described in Patent Document 1, the tape base material constituting the fastening tape and the plate material constituting the stretchable side panel are fixed via a joint region of uniform adhesive strength. As described above, when the diaper is stretched by a uniform bonding strength, when the diaper is worn, when the adhesive tape is stretched by hand and excessive tensile strength is applied to the joined region, the substrate may be broken and difficult to maintain. The wearing state of the diaper. The destruction of the substrate is likely to occur at the side edge portion of the fastening tape side of the joint region, and it is particularly easy to produce both ends of the side edge portion of the fastening tape side of the joint region. As described above, in the diaper described in Patent Document 1, there is room for improvement in terms of improving the feeling of use of the diaper wearing state. Further, in the diaper described in Patent Document 2, the adhesive tape and the stretchable waist panel are also fixed by the second fixing portion having a uniform adhesive strength. Therefore, the base material may be generated in the same manner as the diaper described in Patent Document 1. Destruction has room for improvement in terms of improved use.

Therefore, the present invention provides a disposable diaper in which the adhesive tape and the side sheet are less likely to be broken and damaged when the diaper is worn, and the feeling of use is improved.

Further, in the diaper described in Patent Document 1, the tape base material constituting the fastening tape is fixed to a specific width from the outer side edge of the sheet material constituting the stretchable waist panel. When the tape substrate is fixed in conformity with the outer side edge of the sheet material, when the diaper is worn, when the stretchable waist panel is stretched by hand, the stretched waist panel has a peripheral edge portion facing the non-skin pair. Bending to the face side. If the fixing portion of the fastening tape on the back side of the wearer is pressed against the buckle sheet located on the ventral side of the wearer in a state of being bent toward the non-skin opposite side, for example, When the diaper is worn, it is easy to hang the clothes, and there is room for improvement in terms of improvement in the sense of use. In the diaper described in Patent Document 2, the second fixing portion to which the fastening tape and the stretchable waist panel are fixed is also formed to coincide with the outer side edge of the stretchable waist panel. Therefore, similarly to the diaper described in the patent document 1, the peripheral edge portion of the stretchable waist panel is bent toward the non-skin opposing surface side, and there is room for improvement from the viewpoint of improving the feeling of use.

Therefore, an object of the present invention is to provide a disposable diaper which is easy to face the skin facing surface side when the diaper is worn, and which has a peripheral edge portion other than the stretchable waist panel.

The present invention relates to a disposable diaper comprising a vertically long absorbent body comprising a liquid-retaining absorbent body, a front sheet disposed on the opposite side of the skin of the absorbent body, and disposed in the absorbent a back sheet of the non-skin facing side of the body, and is divided into a ventral side portion on the ventral side of the wearer when worn, a back side portion on the back side, and disposed between the ventral side portion and the back side portion And a side portion of the elastic body side extending outward in the width direction of the elastic side panel There is a fastening tape extending outward in the width direction. The fastening tape is attached to the non-skin opposing surface of the stretchable side panel. The adhesive tape is spaced apart from the outer side edge of the stretchable side panel in the longitudinal direction of the main body toward the absorbent body side, and joined to the stretchable side panel via a first joint region joined by an adhesive. Between the joint region and the outer side edge of the stretchable side panel, the non-joining region of the adhesive tape and the stretchable side panel is not joined or disposed adjacent to the first joint region in the width direction and the joint strength is The second weak junction region which is weaker than the first bonding region is continuously formed over the entire length of the body.

1‧‧‧Disposable diapers

1A‧‧‧Disposable diapers

1B‧‧‧Disposable diapers

1C‧‧‧Disposable diapers

1D‧‧‧Disposable diapers

1E‧‧‧Disposable diapers

1F‧‧‧Disposable diapers

1G‧‧‧Disposable diapers

2‧‧‧Absorbable ontology

2S‧‧‧ side

2S1‧‧‧ side edge

3‧‧‧ side panels (waist)

3S‧‧‧ lateral side

3S1‧‧‧ lateral side edge

4‧‧‧Buckle tape

5‧‧‧With buckle sheet

6‧‧‧ joint area

6S‧‧‧1st joint area

6W‧‧‧2nd weak joint area

7‧‧‧Unjoined area

7E‧‧‧ end

21‧‧‧Front sheet

22‧‧‧ Back sheet

23‧‧‧Acceptor

24‧‧‧Side sheet

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

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

31‧‧‧ Skin side sheet

31S‧‧‧Extension

32‧‧‧Non-skin side sheet

32S‧‧‧Extension

33‧‧‧Flexible components

33I‧‧‧Inside fixed end

33O‧‧‧Outside fixed end

35‧‧‧ Body side adhesive layer

36‧‧‧Outer adhesive layer

37‧‧‧Intermediate adhesive layer

38‧‧‧ Non-continuous area

41‧‧‧With substrate sheet

42‧‧‧ hook material

61‧‧‧Sealed joint (welding)

61G‧‧‧Sealed joint group (welding group)

62‧‧‧Unsealed joint (non-welded joint)

63‧‧‧Binder joint

611‧‧‧1st sealing joint (first welded joint)

611G‧‧‧1st sealed joint group (first welded joint group)

612‧‧‧Second sealing joint (second welded joint)

612B‧‧‧2nd sealing joint (2nd welded joint)

612C‧‧‧Second sealing joint (second welding joint)

612G‧‧‧Second sealed joint group (second welded joint group)

613‧‧‧3rd weld

613G‧‧‧3rd fusion joint group

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧胯下下

CL‧‧‧ center line

CL3‧‧‧ center line

IL1‧‧‧1st imaginary line

IL2‧‧‧2nd imaginary line

IL3‧‧‧3rd imaginary line

P‧‧‧ skin opposite

PD1‧‧‧ intersection

PD2‧‧‧ intersection

PU1‧‧‧ intersection

PU2‧‧‧ intersection

Q‧‧‧Non-skin contrast

S‧‧‧ interval

T1‧‧‧ area

T2‧‧‧ area

X‧‧‧ direction

Y‧‧‧ direction

Fig. 1 is a plan view showing a state in which the unfolded disposable diaper of the embodiment of the present invention (the first invention) is unfolded as seen from the front sheet side.

Fig. 2 is an enlarged plan view showing a state in which the stretchable side panels included in the unfolded disposable diaper of Fig. 1 are unfolded and stretched.

Fig. 3 is a cross-sectional view showing a state in which the cross section of the line I-I of Fig. 1 is contracted.

Fig. 4 is a view showing a state of the stretchable side panel when the unfolded disposable diaper of Fig. 1 is worn.

Fig. 5 is an enlarged plan view (corresponding to Fig. 2) in a state in which the stretchable side panel included in the unfolded disposable diaper according to the second embodiment of the present invention is expanded and stretched.

Fig. 6 is a plan view showing a state in which the unfolded disposable diaper according to the first embodiment of the present invention (the second invention) is stretched and expanded from the front sheet side.

Figure 7 is an enlarged plan view of the stretchable side panels included in the unfolded disposable diaper of Figure 6.

Figure 8 is a cross-sectional view taken along line I-I of Figure 7.

Fig. 9 is an enlarged plan view showing the state of the stretchable side panel when the unfolded disposable diaper of Fig. 6 is worn.

Fig. 10 is an enlarged plan view (corresponding to Fig. 7) of the stretchable side panel included in the unfolded disposable diaper according to the second embodiment of the present invention (second invention).

Fig. 11 is an enlarged plan view (corresponding to Fig. 7) of the stretchable side panel included in the unfolded disposable diaper according to the third embodiment of the present invention (second invention).

Fig. 12 is an enlarged plan view (corresponding to Fig. 7) of the stretchable side panel included in the unfolded disposable diaper according to the fourth embodiment of the present invention (second invention).

Fig. 13 is an enlarged plan view (corresponding to Fig. 7) of the stretchable side panel included in the unfolded disposable diaper according to the fifth embodiment of the present invention (second invention).

Fig. 14 is an enlarged plan view (corresponding to Fig. 7) of the stretchable side panel included in the unfolded disposable diaper according to the sixth embodiment of the present invention (second invention).

Hereinafter, the disposable diaper according to the present invention (first invention) will be described with reference to Figs. 1 to 4 based on the preferred embodiment.

As shown in Fig. 1, the disposable diaper 1 of the present embodiment (hereinafter also referred to as "diaper 1") The absorbent body 2 of the longitudinal length is long in the longitudinal direction (Y direction) of the main body, and includes a liquid retaining body 23 and a front sheet 21 disposed on the skin facing side of the absorbent body 23. And the back sheet 22 disposed on the non-skin facing surface side of the absorber 23, and is divided into a belly side portion A on the ventral side of the wearer when worn, a back side portion B on the back side, and a ventral side portion. The lower portion C between the A and the back side portion B. As shown in FIG. 1, the diaper 1 is one end side in the longitudinal direction (Y direction) of the absorbent body 2, specifically, the side of the both sides 2S of the back side portion B is attached to the side extending outward in the width direction (X direction). In the sheet 3, a fastening tape 4 extending outward in the width direction (X direction) is attached to the side portion 3S of the side sheet 3 in the longitudinal direction (Y direction) of the main body.

The diaper 1 is formed to be bilaterally symmetrical with respect to the center line CL as shown in FIG. Therefore, in the following description, the left-right symmetrical portion will be mainly described on the right side.

In the present specification, the term "skin-facing surface" refers to the surface of the front and back sides of the members constituting the diaper 1, which is placed on the side of the wearer's skin, and is "P" in FIG. The same side of the side. In addition, the term "non-skin opposing surface" refers to the surface on the opposite side of the skin on the front and back sides of each member constituting the diaper 1, and is on the side opposite to the "Q" side in FIG. The same side.

Further, the "Y" direction shown in each drawing is the longitudinal direction of the absorbent body 2 of the diaper 1 (the longitudinal direction of the main body), and is parallel to the center line CL, and the "X" direction shown in each drawing is shown. The absorbent body 2 of the diaper 1 has a width direction (body width direction) and is perpendicular to the center line CL. Hereinafter, the diaper 1 will be specifically described.

As shown in FIG. 1, the absorbent body 2 has a rectangular shape which is long in the Y direction, and includes a liquid permeable front sheet 21, a liquid impervious or liquid impervious (including water repellency) back sheet 22 And a liquid retaining 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 opposite surface of the absorbent body 23 and the non-skin opposing surface, respectively, extending from the periphery of the absorbent body 23, in the extended portion. It is fixed by welding by an adhesive such as hot melt or heat sealing. positive The face sheet 21 is the same length as the back sheet 22 in the Y direction, but is formed shorter than the back sheet 22 in the X direction. The back sheet 22 is formed in the same shape as the absorbent body 2 in plan view.

Further, the side sheets 24 are disposed on the both side portions 2S of the absorbent main body 2 in the Y direction via the front sheet 21, respectively. The side sheet 24 is disposed to be fixed to the skin facing surface side of the front sheet 21 and extends over the entire area of the side portion 2S in the Y direction. The end portion of the side sheet 24 in the X direction (near the center line CL) is a free end, and the elastic member 25 for forming the three-dimensional gathers is disposed in the vicinity of the free end of the lower portion C in the Y direction. When worn, the portion of the specific width from the free end is separated from the front sheet 21 by the contraction force of the elastic member 25 to form a three-dimensional gather.

Further, the side sheet 24 and the back sheet 22 extending outward in the X direction are joined to the both side portions 2S of the absorbent body 2 in the Y direction, and a burring portion is formed. In the diaper 1, as shown in Fig. 1, the elastic member 26 for forming a leg gather is disposed in a flange portion which is fixed to the crotch portion C in a state of being elongated in the Y direction, and is contracted by the elastic member 26 when worn. Force to form leg folds.

As described above, the side sheets 3 extending outward in the width direction (X direction) are attached to the both side portions 2S of the back side portion B of the absorbent body 2, as shown in Fig. 1, on the outer side of the side sheet 3 The portion 3S is attached with a fastening tape 4 that extends outward in the width direction (X direction). In the diaper 1, as shown in Fig. 3, the non-skin opposing surface of the back sheet 22 disposed on the side portion 2S is outwardly directed to the X direction by the side edge 2S1 of the self-absorbent body 2 by various known methods. The side panel 3 is fixed in the manner of extension. Further, in the diaper 1, the side panel 3 is fixed to the non-skin opposing surface of the back sheet 22, but may be disposed to be fixed between the side sheet 24 disposed on the side portion 2S and the back sheet 22, It can also be fixed to the skin opposite side of the side sheet 24. Further, in the diaper 1, the side panel 3 is a stretchable side panel having elasticity in the X direction.

The stretchable side panel 3 is attached to the diaper 1, and as shown in FIG. 2 and FIG. 3, between the skin side sheet 31 on the opposite side of the skin and the non-skin side sheet 32 on the non-skin facing side. solid It is formed by a plurality of filament-shaped elastic members 33 which are elongated in the X direction. Further, the length of the outer side portion 3s in the Y direction of the stretchable side panel 3 is formed to be longer than the length of the fastening tape 4 in the Y direction of the joint region 6. As will be described in detail, the stretchable side panel 3 of the diaper 1 is formed into a rectangular shape in a state of being flattened as shown in Fig. 2, and the skin side sheet 31 and the non-skin side sheet constituting the stretchable side panel 3 are formed in a rectangular shape. 32 is also formed in a planar shape in the same manner as the stretchable side panel 3 in a plan view. The plurality of elastic members 33 are arranged substantially in parallel in the X direction of the diaper 1, and extend in the X direction. Further, the plurality of elastic members 33 in the stretchable side panel 3 are disposed on the diaper 1 at substantially equal intervals in the Y direction. In the diaper 1, the stretchable side panel 3 is formed in a rectangular shape. However, if the length of the side edge of the stretchable side panel 3 in the Y direction is longer than that of the fastener tape 4 to the joint region 6, Y is formed. The length of the direction can also be trapezoidal or include the shape of a curve.

As described above, the side panel 3 of the diaper 1 is a stretchable side panel, but may be a side panel which does not have stretchability. Further, the stretchable side panel 3 of the diaper 1 is formed by disposing a plurality of elastic members 33 having a plurality of filaments between the two nonwoven fabrics (the skin side sheet 31 and the non-skin side sheet 32), but the stretchable side sheets are formed. (3) A composite in which a fixed elastic film or a mesh containing an elastic body is disposed between two pieces of non-woven fabric (skin side sheet 31 and non-skin side sheet 32) instead of the filament-shaped elastic member 33 may be used. body. Further, in the case where the filament-shaped elastic member 33 is used, a narrow band such as a rectangular shape is included in addition to a cross section having a substantially circular or square cross section.

Further, in the stretchable side panel 3 of the diaper 1, as shown in Figs. 2 and 3, the skin side sheet 31 and the non-skin side sheet 32 constituting the stretchable side panel 3 are formed in the same shape and the same size. However, the skin side sheet 31 and the non-skin side sheet 32 may have different lengths such as the extension length of the side edge 2S1 of the self-absorbent body 2. When the stretch side panel 3 is formed by the skin side sheet 31 and the non-skin side sheet 32 having different lengths extending in the X direction from the side edge 2S1, the outer side portion 3S of the stretchable side panel 3 is outward in the X direction. It is formed by one piece of the skin side sheet 31 or the non-skin side sheet 32. Therefore, the softness of the outer side portion 3S of the stretchable side panel 3 is improved. high.

The filament-shaped elastic member 33 disposed on the stretchable side panel 3 preferably has a width (a dimension in the Y direction) or a diameter of 0.1 in terms of improvement in flexibility or stretchability of the stretchable side panel 3. It is not less than mm and not more than 2 mm, more preferably not less than 0.1 mm and not more than 1 mm. Moreover, the number of the filament-shaped elastic members 33 disposed on the stretchable side panel 3 is preferably one or more and 25 or less, more preferably three or more and twenty or less. Further, the elongation can be appropriately selected from the prior art, and the one elastic member 33 having a linear stress of 0.1 N or more and 1 N or less when the elongation is 100% is preferably an elongation of 50% or more and 300%. The state in which the following range is extended is fixed, and it is preferable to arrange and fix in a state in which the range is extended in a range of 100% or more and 250% or less. Further, the elongation is an elongation and the ratio of the length to the natural length, for example, when the length is 10 cm, the elongation is set to 100%.

Further, in the case where a fixed elastic film or a mesh containing an elastic body is provided instead of the filament-shaped elastic member 33 to form the stretchable side sheet 3, it is preferable to stretch to a width of 25 mm every 25 mm. The mesh having a stress of 3 N/25 mm or more and 25 N/25 mm or less is formed by being fixed in a state in which the elongation is 50% or more and 300% or less, and more preferably 100% or more and 250% or less. The state in which the range is extended is formed by being fixed. Further, in the case where an elastic film or a mesh containing an elastomer is used in place of the filament-shaped elastic member 33 to stretch the side panel 3, the elastic film or the web is also disposed in a non-stretched state. The case where the side sheet is formed by being fixed between the skin side sheet 31 and the non-skin side sheet 32. In this case, in the subsequent step, in order to impart stretchability in the width direction to the skin side sheet 31 and the non-skin side sheet 32, the stretchable side sheet 3 is formed by stretching in the width direction. The extent of the elongation may be a range in which the elastomer film or the web to be used is not damaged, and is preferably in the range of 50% or more and 300% or less.

As shown in FIG. 3, the side panel 3 in the diaper 1 has an adhesive layer which fixes a plurality of filament-shaped elastic members 33 between the skin side sheet 31 and the non-skin side sheet 32, and the adhesive layer pack The main body side adhesive layer 35 on the end side of the side of the absorbent body 2 on which the elastic members 33 are fixed, and the side surface side outer side adhesive layer 36 on the side of the outer side portion 3S side of the side sheet 3 to which the elastic members 33 are fixed And an intermediate adhesive layer 37 disposed between the body-side adhesive layer 35 and the outer adhesive layer 36 and fixing the two sheets 31, 32. The intermediate adhesive layer 37 is provided with a plurality of strips in a region between the body side adhesive layer 35 and the outer adhesive layer 36. The intermediate adhesive layer 37 is in the diaper 1 and has a width smaller than either of the above two adhesive layers 35, 36, and is intermittently disposed in the X direction in the intermediate portion 30. As shown in FIG. 2, the main body side adhesive layer 35, the outer side adhesive layer 36, and the intermediate adhesive layer 37 and the respective elastic members 33 cross and extend in the Y direction, and extend over the entire length of the stretchable side sheet 3 in the Y direction. Therefore, the plurality of filament-shaped elastic members 33 in the stretched state are fixed between the skin-side sheet 31 and the non-skin-side sheet 32 via the main body side adhesive layer 35, the outer adhesive layer 36, and the intermediate adhesive layer 37. The stretchable side panel 3 is applied to the body side adhesive layer 35 and the outer adhesive layer 36 in either or both of the skin side sheet 31 and the non-skin side sheet 32 by various known methods. The adhesive of the intermediate adhesive layer 37 is formed by laminating and pressing the sheets 31 and 32 after coating, thereby fixing a plurality of elastic members 33 in an elongated state.

As shown in FIG. 3, the stretchable side panel 3 is a portion where the elastic member 33 is not interposed, and the skin side sheet 31 and the non-skin side sheet 32 pass through the main body side adhesive layer 35 and the outer adhesive layer 36, respectively. The intermediate adhesive layer 37 is directly bonded. Therefore, between the body-side adhesive layer 35 and the intermediate adhesive layer 37 adjacent thereto, the adjacent intermediate adhesive layer 37, and the outer adhesive layer 36 and the intermediate adhesive layer 37 adjacent thereto A non-adjacent region 38 of the skin side sheet 31 and the non-skin side sheet 32 is not formed, respectively. Similarly to the adhesive layers 35, 36, and 37, the non-adjacent region 38 intersects with all of the plurality of elastic members 33 as shown in FIG. 2, and extends in the Y direction over the entire length of the side sheets 3 in the Y direction.

In the side panel 3 of the diaper 1 formed as described above, the elastic member 33 is fixed in an elongated state by the body side adhesive layer 35, the front end side adhesive layer 36, and the intermediate adhesive layer 37, and the elastic member 33 is fixed to the elastic member 33. In the natural state of shrinkage, as shown in Figure 3, on both sides of the side panel 3 There are a plurality of wrinkles formed. Each of the creases is formed to extend in the Y direction so as to intersect the plurality of elastic members 33. As shown in FIG. 3, the crease formed on the side panel 3 is between the main body side adhesive layer 35 and the front end side adhesive layer 36, and by the contraction of the elastic member 33, the two sheets 31, 32 are respectively The region 38 is convex 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 a concavo-convex shape. Such wrinkles will not completely disappear under the wearing condition of the diaper.

As shown in FIGS. 2 and 3, each of the elastic members 33 in the stretchable side panel 3 thus formed includes an inner side (near the center line CL) fixed end portion 33I and fixed by the main body side adhesive layer 35. The outer side fixed end portion 33O is fixed by the outer adhesive layer 36.

The length of the outer fixed end portion 33O in the X direction is preferably 3% or more and 20% or less of the total length of the elastic member 33 in the X direction in the natural state of the stretchable side sheet 3 shown in Fig. 2 . Further, it is preferably in the range of 5% or more and 15% or less. The length of the inner fixed end portion 33I in the X direction is also the same as the length of the outer fixed end portion 33O in the X direction. Further, the stretchable side panels 3 may be combined with the adhesive layers 35, 36, and 37, or may be combined and fixed by heat sealing or the like.

As shown in FIGS. 2 and 3, the skin side sheet 31 of the stretchable side panel 3 has a plurality of filament-shaped elastic members 33 extending outward in the X direction from the outer side fixed end portion 33O of the elastic member 33. Similarly to the extension portion 31S, the non-skin side sheet 32 has an extending portion 32S extending outward in the X direction from the outer side fixed end portion 33O of the plurality of elastic members 33 in the X direction. The extending portions 31S and 32S are joined to each other via a plurality of sealing joint portions 61 formed by crimping or embossing or ultrasonic sealing or ultrasonic sealing. The extending portions 31S and 32S may be fixed to each other instead of the sealing joint portion 61, and may be combined in view of the fact that the outer side portion 3S of the stretchable side panel 3 is not easily curled during use.

The fastening tape 4 is joined to the single side of the side panel 3 via the joining region 6, and is attached to the non-skin opposing surface (surface on the Q side) of the stretchable side panel 3 in the diaper 1 as shown in FIG. Specifically, in the diaper 1, as shown in FIG. 3, the inner side of the X-direction of the fastening tape 4 (center line CL attached) The proximal side is attached only to the extension portion 32S of the outer side fixed end portion 33O of the filament-like elastic member 33 constituting the non-skin side sheet 32 of the stretchable side panel 3, and is attached to the extension portion 32S. Non-skin opposite surface (Q side). The fastening tape 4 is attached to the diaper 1, and is attached to the vicinity of the end portion on the side of the back side portion B in the Y direction of the stretchable side panel 3 as shown in Fig. 2 . Further, in the diaper 1, the fastening tape 4 is attached only to the non-skin opposing surface of the side panel 3, but may be attached only to the skin facing surface of the side panel 3.

When the fastening tape 4 provided on the outer side portion 3S of the stretchable side panel 3 is described in detail, the fastening tape 4 includes the tape substrate sheet 41 and has an outer side in the X direction of the tape substrate sheet 41. A plurality of hooks 42 that engage the protrusions. The fastening tape 4 is folded before use, and is used as shown in Fig. 3 when it is used. The fastening tape 4 of the diaper 1 has a rectangular shape elongated in the X direction in the unfolded state as shown in Fig. 2 . The fastening tape 4 is formed by fixing the hook material 42 to the outer side in the X direction of the tape substrate sheet 41 which is formed in the same shape as the plan view of the fastening tape 4 . Further, on the outer surface of the ventral portion A of the diaper 1, as shown in Fig. 1, a clasp sheet 5 for fixing the hook material 42 of the fastening tape 4 is provided.

As shown in Fig. 2, the joint region 6 of the bonded fastening tape 4 and the side panel 3 includes a first joining region 6S joined by an adhesive, and is disposed adjacent to the first joining region 6S in the width direction (X direction). Further, the joint strength is weaker than the second weak joint region 6W of the joint strength of the first joint region 6S. The joint region 6 is formed over the entire area of the region where the fastening tape 4 and the side panel 3 overlap. The bonding region 6 includes a first bonding region 6S and a second weak bonding region 6W which are adjacent to each other. The first joint region 6S and the second weak joint region 6W are formed over both ends of the fastening tape 4 that overlaps the side panel 3 in the Y direction. The second weak joint region 6W adjacent to the first joining region 6S is formed between the first joining region 6S and the outer side edge 3S1 of the stretchable side sheet 3 as shown in Fig. 2 . Here, the first joining region 6S has, for example, a joining strength at which the joining portion of the fastening tape 4 and the side panel 3 is firmly fixed to the extent that the base material is broken when the fastening tape 4 is stretched in the X direction. Further, the second weak joint region 6W has a joint strength weaker than the joint strength of the first joint region 6S, and for example, when the fastening tape 4 is stretched in the X direction, the joint portion of the fastening tape 4 and the side panel 3 is Cause The degree of peeling that is fixed before the substrate is broken. When the bonding strength is included, the specific bonding strength is not limited, and the value of the bonding strength of the first bonding region 6S which causes the substrate to be broken is changed depending on the strength of the substrate, and is exemplified in the side panel 3 When the base material on the side of the joint with the fastening tape 4 is a spunbonded nonwoven fabric, the joint strength is 15 N/25 mm or more and 40 N/25 mm or less in terms of tensile strength immediately before the material is broken.

Further, the specific bonding strength is not limited, and the bonding strength of the second weak bonding region 6W is preferably 5% or more and 70% or less, more preferably 20% or more and 50% or less with respect to the bonding strength of the first bonding region 6S. %the following.

In the following, the method of measuring the bonding strength of the first bonding region 6S and the bonding region of the second weak bonding region 6W is described. However, in the present invention (first invention), the bonding strength may be used, and other measurement methods may be used. There is no special limit.

<Method of measuring joint strength>

A sample having the first joining region 6S and the second weak joining region 6W at the overlapping portion of the fastening tape 4 and the side panel 3 was used as a measurement sample, and was pulled by a tensile tester (RTC-1150, manufactured by Orientec Co., Ltd.). The stretching speed was 300 mm/min, and the first weak bonding region was peeled off at 6 W. The tensile strength at this time is set as the joint strength of the second weak joint region 6W. The tensile strength before the destruction of the material of the side panel 3 or the fastening tape 4 is set to the first bonding strength 6S while maintaining the state and continuing the stretching.

The first joining region 6S of the diaper 1 is joined by an adhesive as shown in FIG. 2, and joined by a plurality of sealing joints 61 formed by crimping or heat sealing or ultrasonic sealing using embossing. . As shown in FIG. 2, the second weak joint region 6W of the diaper 1 is joined only by a plurality of sealing joint portions 61 formed by pressure bonding or heat sealing or ultrasonic sealing. As described above, in the diaper 1, the first bonding region 6S is formed by the adhesive and the sealing, and the second weak bonding region 6W is formed only by the sealing. Therefore, the second weak bonding region 6W is weaker than the first bonding region 6S. Joint strength of joint strength. Furthermore, in diapers In the first bonding region 6S having a high bonding strength, the first bonding region 6S having a low bonding strength is formed by sealing, and the second weak bonding region 6W is weaker than the second bonding region 6W. For the bonding strength of the bonding strength of the first bonding region 6S, for example, both the first bonding region 6S and the second weak bonding region 6W can be formed only by the adhesive, and the first bonding region 6S and the second weak bonding region 6W can also be used. They are all formed only by sealing.

Specifically, in order to form the first bonding region 6S and the second weak bonding region 6W only by the adhesive, for example, the adhesive composition basis weight of the first bonding region 6S is larger than that of the second weak bonding region 6W. The basis weight of the coating may be such that the coating basis weight of the first bonding region 6S is 10 to 50 g/m ² , and the coating basis weight of the second weak bonding region 6W is reduced with respect to the coating basis weight of the first bonding region 6S. It is preferably 50% or less, preferably 20% or less. Alternatively, the first bonding region 6S is applied as a whole of the adhesive, and the second weak bonding region 6W is formed by patterning a plurality of coating lines coated with an adhesive having a linear shape in the width direction intermittently in the longitudinal direction. Just like it. As a third method, a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS) low-density polyethylene resin, and ethylene may be coated. - a general hot-melt resin such as a vinyl acetate resin is used as an adhesive for coating the second weak bonding region 6W, and a strong copolymerized polyamide thermal melt resin is applied as an adhesive applied to the first bonding region 6S. obtain.

When the first bonding region 6S and the second weak bonding region 6W are formed only by the adhesive, for example, the first bonding region 6S may be applied as a whole, and the second weak bonding region 6W may be applied intermittently. The coating method of the subsequent agent or the coating amount of the adhesive is changed.

Further, when the first joining region 6S and the second weak joining region 6W are formed by sealing only by heat sealing or ultrasonic sealing, for example, the first joining region 6S and the skin side sheet constituting the side panel 3 can be formed. 31 or the temperature of the fiber of the non-skin side sheet 32 or the melting point of the fiber constituting the substrate sheet 41 is sealed, and the second weak joint region 6W is formed on the skin side of the side sheet 3 The melting point of the fibers of the sheet 31 or the non-skin side sheet 32 is about 0 to 20% lower, or a temperature lower than the melting point of the fibers constituting the substrate sheet 41 by about 0 to 20%. It is formed by sealing under conditions.

Further, the sealing of the first joining region 6S and the second weak joining region 6W may be formed by pressure bonding by embossing. For example, the embossing roll is tempered to a temperature at which the melting point of the fibers constituting the skin side sheet 31 or the non-skin side sheet 32 of the side sheet 3 and the temperature constituting the melting point of the fibers constituting the substrate sheet 41 are lower than the melting point of the fibers constituting the substrate sheet 41. After the constituent members of each of the layers are laminated, embossing is performed on a portion corresponding to the first joining region 6S and the second weak joining region 6W. Thereby, a seal using crimping can be formed.

As shown in FIG. 2, the joint region 6 including the first joining region 6S and the second weak joining region 6W has a plurality of small-shaped sealing joint portions 61 which are regularly arranged in the Y direction, and are sealed joint portions 61G. The plurality of partial groups 61G are arranged in the X direction, and the adjacent sealing joint portions 61 and 61 forming the other sealed joint portion group 61G are arranged so as not to be aligned in the X direction. As will be described in detail, as shown in FIG. 2, the sealing joint portion 61 of the diaper 1 includes a first seal joint portion 611 having a longitudinal length with respect to the Y direction, and a longitudinal direction opposite to the first seal joint portion 611. The second second sealing joint portion 612. Here, the imaginary first sealing joint portion 611 in which the first sealing joint portion 611 is symmetrically arranged with respect to the first imaginary line IL1 (see FIG. 2) extending in parallel with the center line CL is assumed. The angle with respect to the Y direction and the angle of the second seal joint portion 612 with respect to the Y direction are the same angle. As shown in FIG. 2, the seal joint portion group 61G of the diaper 1 includes the first seal joint portion 611G and the second seal joint portion 612 which are regularly arranged at intervals in the Y direction, and the second seal joint portion 612 is regularly arranged in the Y. The second sealing joint group 612G is arranged in a direction spaced apart from each other. Further, as shown in FIG. 2, the joint region 6 of the diaper 1 is alternately arranged in the X direction by the first seal joint portion group 611G and the second seal joint portion group 612G in the first joint region 6S and the second weak joint. The first sealing joint group 611G and the second seal joint group 612G are arranged in the region 6W. Therefore, the first seal joint portion 611 and the second seal joint portion 612 which are adjacent to each other to form the other seal joint portion group 61G (the first seal joint portion group 611G or the second seal joint portion 612) are not arranged in parallel in the X direction. The position is shifted in the Y direction.

The second weak joining region 6W is provided in the diaper 1 as shown in FIG. 2, and includes a plurality of sealing joint portions 61 (first seal joint portion 611 and second seal joint portion 612) and adjacent seal joint portions 61. The non-seal joint portion 62 between the first seal joint portion 611 and the second seal joint portion 612. Specifically, in the diaper 1, the second weak joint region 6W is joined only by the plurality of seal joint portions 61 as shown in FIG. 2, and therefore the adjacent seal joint portion 61 (the first weld portion 611 and the second weld joint) The portion 612) is a non-joining portion 62 that does not engage the fastening tape 4 and the side sheets 3 with each other. As described above, since the second weak joint region 6W has the non-joining portion 62, it is excellent in flexibility.

Further, as described above, the first joining region 6S is joined to the diaper 1 via a plurality of sealing joint portions 61 as shown in FIG. 2, and joined by the adhesive bonding portion 63 using an adhesive. The adhesive bonding portion 63 is in the X direction and includes a width of a width of the two rows of the sealing joint portion group 61G (the first sealing joint portion group 611G and the second sealing joint portion group 612G), and is parallel to the center line CL in the Y direction. It is formed continuously throughout the entire length of the fastening tape 4 in the Y direction. Further, the adhesive bonding portion 63 of the diaper 1 is formed to have a width including the width of the two rows of the sealing joint portion group 61G, but may be formed to have a width that does not match the width of the two rows of the sealing joint portion group 61G. As described above, in the first joining region 6S, the adjacent sealing joint portion 61 (the first seal joint portion 611 and the second seal joint portion 612) is fixed by the adhesive between the first joint region 6S, and therefore does not exist in the first joint region 6S. The non-engagement portion 62 of the adhesive tape 4 and the side panel 3 is not joined. In the first joining region 6S, the fastening tape 4 and the stretchable side sheet 3 are fixed by welding and an adhesive, and therefore the bonding strength is improved as compared with the second weak bonding region 6W.

Further, a part of the plurality of welded portions 61 is sealed in the diaper 1 and extends outward in the width direction (X direction) across the outer side edge 3S1 of the stretchable side sheet 3 in the longitudinal direction (Y direction) of the main body. . Specifically, the plurality of second sealing joint portions 612 constituting the second seal joint portion group 612G disposed in the first seal joint portion group 611G and the second seal joint portion group 612G of the second weak joint region 6W are respectively The weak joint region 6W extends outward in the X direction across the outer side edge 3S1 of the side panel 3. In other words, it is placed in the second weak junction area 6W. The plurality of second sealing joint portions 612 constituting the second welded portion group 612G are disposed across the outer side edge 3S1 of the side sheet 3 . In this manner, one of the plurality of sealing joint portions 61 in the plurality of sealing joint portions 61 extends outward in the width direction across the outer side edge 3S1 of the side panel 3 in the longitudinal direction of the body, thereby suppressing the self-side along the fastening tape 4 The side panel 3 protrudes from the adhesive strip 4 at the boundary where the outer side edge 3S1 of the sheet 3 extends.

The length of the stretchable side panel 3 of the region where the stretchable side panel 3 overlaps the fastening tape 4 (joining region 6) in the Y direction is longer than the adhesive tape 4 of the overlap region (joining region 6) in the Y direction. length. Here, the length in the Y direction refers to the widest portion of the stretchable side panel 3 or the portion of the fastening tape 4 including the region (joining region 6) where the stretchable side panel 3 and the fastening tape 4 overlap. The length of the location. The length of the stretchable side panel 3 in the Y direction of the overlap region (joining region 6) is improved in terms of the operability of the wear-reducing feeling and the force acting inward on the opposite side of the skin. It is preferable that the length of the fastening tape 4 in the overlap region (joining region 6) is 1.2 times or more and 3.5 times or less in the Y direction, and further preferably 1.4 times or more and 3.0 times or less.

From the viewpoint of the strength, the overlap region (joining region 6) is preferably 10% or more and 50% or less with respect to the total area of the stretchable side sheets 3 when the stretchable side sheets 3 are in a natural state in a plan view. The range is further preferably in the range of 10% or more and 40% or less.

The first bonding region 6S preferably has an area that is equal to or larger than the area of the second weak bonding region 6W.

The first bonding region 6S is preferably in a range of 40% or more and 80% or less with respect to the area of the overlapping region (joining region 6), and is preferably 50% or more, from the viewpoint of the non-destructive wearing feeling and the subsequent improvement in strength. And the range of 70% or less.

From the same viewpoint, the second weak junction region 6W is preferably in a range of 20% or more and 60% or less with respect to the area of the overlapping region (joining region 6), and more preferably 30% or more and 50% or less. range.

The shape of the welded portion 61 (the first welded portion 611 and the second welded portion 612) of the sealing joint portion is not particularly limited, and may be, for example, a circular shape or a rhombus shape in addition to an elliptical shape such as a diaper 1 Any shape such as a triangle or a polygon. The sealing pattern area of one sealing joint portion 61 (one first sealing joint portion 611 or one second seal joint portion 612) is preferably 2 mm ² or more and 30 mm from the viewpoint of the non-destructive wearing feeling and the subsequent strength improvement. ² or less, further preferably 2 mm ² or more and 20 mm ² or less. From the same viewpoint, the distance between the first welded portion 611 adjacent in the Y direction or the second sealed joint portion 612 adjacent in the Y direction is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm or less. From the same viewpoint, the distance between the adjacent adjacent seal joint portions 61 (the distance between the first seal joint portion 611 and the second seal joint portion 612) is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm. the following. In the same manner, the number of the sealing joint portions 61 (the first seal joint portion 611 and the second seal joint portion 612) is preferably one/cm ² or more and 16 pieces/cm ² or less. Further, it is preferably 2 pieces/cm ² or more and 10 pieces/cm ² or less. Further, from the same viewpoint, the ratio of the total seal pattern area of the plurality of seal joint portions 61 (the first seal joint portion 611 and the second seal joint portion 612) to the area of the overlap region (joining region 6) is higher. It is preferably 10% or more and 70% or less, and more preferably 10% or more and 50% or less.

In the diaper 1, as shown in Fig. 2, the fastening tape 4 is attached to the vicinity of the end portion on the side of the back side portion B of the side panel 3 to be attached. Therefore, when the fastening tape 4 is stretched at the time of wearing, the inclination angle of one sealing joint 61 disposed in the outermost width direction (X direction) and the most lower side C side in the plurality of welded portions 61 is formed. The angle of inclination of the intersection point PD1 between the side panel 3 and the fastening strip 4 on the crotch portion C side and the second imaginary line IL2 of the side sheet 3 and the intersection point PD2 of the absorbent body 2 on the crotch portion C side substantially coincide. In other words, when the fastening tape 4 is stretched during wearing, the plurality of second sealing joint portions 612 constituting the second sealing joint portion group 612G of the second weak joining region 6W of the joining region 6 are placed in the diaper 1. The inclination angle of one of the second welded portions 612C disposed on the lowermost C side of the crotch is substantially the same as the inclination angle of the second imaginary line IL2. In the diaper 1, the inclination angles of the plurality of second sealing joint portions 612 constituting the second seal joint portion group 612G of the first joint region 6S and the second weak joint region 6W of the joint region 6 are respectively disposed. All of them coincide with the inclination angle of the second sealing joint portion 612C. In addition, the second welded portion 612C disposed on the most lower side C side refers to a sealed joint portion in which one or more of the area covers the second weak joined region 6W.

Further, in the diaper 1, as shown in FIG. 3, the joint region 6 partially overlaps with one of the outer side outer fixed end portions 33O of the elastic member 33 in the stretchable side panel 3. As described in detail, in the diaper 1, the first joint region 6S of the joint region 6 and a portion of the outer side fixed end portion 33O of the elastic member 33, that is, the outer side of the outer side fixed end portion 33O of the elastic member 33 are formed. Some overlap. The area of overlap between the first bonding region 6S and the outer bonding layer 36 is preferably in the range of 5% or more and 50% or less with respect to the area of the outer bonding layer 36, and more preferably in the range of 15% or more and 30% or less.

When the diaper 1 is worn, the fastening tape 4 is unfolded, and the hook material 42 of the fastening tape 4 is pressed against the fastening sheet 5 in a state in which the fastening tape 4 is stretched by hand and the side panel 3 is stretched. fixed.

The constituent materials of the diaper 1 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 sheet 22, a film which is liquid-impermeable or liquid-impermeable, or a non-woven fabric (for example, a spunbond-melt-spun nonwoven fabric, a hot air non-woven fabric, a spunbonded nonwoven fabric, a water needle nonwoven fabric, a needle-punched nonwoven fabric, or the like) can be used. Alternatively, it may be used as a composite sheet in which these layers are laminated. Further, as the absorber 23, an aggregate of fibers such as a pulp fiber containing a water-permeable tissue or a nonwoven fabric (which may be a nonwoven fabric) or an absorbent core obtained by holding the water-absorbent polymer particles therein may be used. Body and so on. As the side sheet 24 constituting the three-dimensional protection, a laminated sheet of a film, a nonwoven fabric, a woven fabric, or the like can be used.

The skin side sheet 31 and the non-skin side sheet 32 constituting the stretchable side panel 3 can be used without any particular limitation for the absorbent articles previously used for disposable diapers and menstrual napkins. Kind of sheet.

For example, as the skin side sheet 31 and the non-skin side sheet 32, a laminated sheet of a nonwoven fabric, a woven fabric, a film, or the like can be used.

As the filament-shaped elastic member 33 constituting the stretchable side panel 3, the elastic member 25 constituting the three-dimensional shield, and the leg elastic member 26, natural rubber, polyurethane, polystyrene-polyisoprene can be used. A filament-like or rope-like elastic member such as an olefin copolymer, a polystyrene-polybutadiene copolymer, or a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene. The plurality of elastic members 33 disposed on the stretchable side panel 3 are preferably arranged at the same elongation rate from the viewpoint of the manufacturing cost or the simplification of the manufacturing steps.

Preferred materials for bonding the adhesive between the members, which are representative of the adhesive for forming the main body side adhesive layer 35, the outer adhesive layer 36 and the intermediate adhesive layer 37 of the stretchable side panel 3, are exemplified by: Amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate copolymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene Thermoplastic polymers such as styrene-styrene block copolymer (SIS), styrene-ethylene/butylene-styrene block copolymer (SEBS), styrene-ethylene/propylene-styrene block copolymer (SEPS) a mixture of them and the like. The subsequent agent is preferably a hot melt type.

Further, the application pattern of the adhesive forming the adhesive layers 35, 36, and 37 is preferably a so-called integral coating using a spray gun, a coating gun, or the like as an adhesive coating machine, but as an adhesive coating machine, Pattern coating such as a linear gun, a spiral shape, an Ω-shape, or a dot shape can be performed using a bead gun, a spiral spray gun, an Ω-shaped spray gun, a transfer roller, or the like.

In the case where the side panel 3 is not a stretchable side panel, various sheets previously used for absorbent articles such as disposable diapers and menstrual napkins can be used without particular limitation, and for example, laminated sheets of non-woven fabric, film or the like can be used. Materials and so on.

The hook material 42 and the tape substrate sheet 41 that form the fastening tape 4 are generally used without any particular limitation as long as they can be used for absorbent articles such as disposable diapers. For example, as the hook material 42, "Magic Tape (registered trademark)" (manufactured by KURARAY Co., Ltd.) can be used. Hook-on members such as "Quicklon (registered trademark)" (manufactured by YKK), "Magi Cloth (registered trademark)" (manufactured by Kanebo Bell-Touch Co., Ltd.), etc. As the tape substrate sheet 41, a synthetic resin such as polyethylene or polypropylene or polyethylene terephthalate, or a composite material containing two or more kinds of these synthetic resins, a nonwoven fabric or the like can be used.

The effect of the disposable diaper 1 (hereinafter also referred to as "diaper 1") of the present embodiment as the present invention (first invention) will be described.

In the diaper 1, as shown in Figs. 2 and 3, the joint region 6 of the bonded fastening tape 4 and the side panel 3 is joined by the first joining region 6S joined by the adhesive and adjacent to the first joining region 6S. It is formed by the second weak junction region 6W which is disposed outside the width direction (X direction) and whose bonding strength is weaker than the bonding strength of the first bonding region 6S. Therefore, as shown in FIG. 4, when the diaper is worn, the adhesive tape 4 is stretched by hand to apply excessive tensile strength to the joint region 6, and the outer side edge of the side panel 3 is closer to the first joint region 6S. The second weak joint region 6W on the 3S1 side, the adhesive tape and the side sheets are easily peeled off to the extent that the substrate is not damaged. In this manner, the second weak joining region 6W on the side of the outer side edge 3S1 side of the side panel 3 is easily peeled off. Therefore, in the first joining region 6S, the fastening tape 4 and the side panel 3 are less likely to be broken and damaged, and the diaper 1 can be maintained. In the wearing state, the feeling of use is improved.

In the diaper 1, as shown in FIG. 2 and FIG. 3, the second weak joint region 6W is disposed adjacent to the outer side in the width direction (X direction) of the first joining region 6S, so that the diaper 1 is worn or used. In the middle side, the outer side edge 3S1 of the side panel 3 is less likely to be curled or bent, and the feeling of use is improved. In particular, in the diaper 1, as shown in FIGS. 2 and 3, the side panel 3 is a stretchable side panel, and the fastening tape 4 is attached only to the non-skin opposing surface of the stretchable side panel 3 (the side on the Q side). Therefore, the above effects are further exerted. In addition, since the second weak joining region 6W is disposed on the outer side in the width direction (X direction) from the first joining region 6S, the outer side edge 3S1 of the side panel 3 is less likely to be curled or bent during the conveyance of the diaper 1 . Increased production efficiency.

Further, in the diaper 1, as shown in FIGS. 2 and 3, the first joining region 6S is formed by an adhesive and a seal, and the second weak joining region 6W is formed only by sealing. So, in the first joint The region 6S is disposed on the outer side in the width direction (X direction) and has the second weak bonding region 6W to which the adhesive is not applied. Therefore, when the first bonding region 6S is formed by applying the adhesive, the outer side edge of the side panel 3 is extended. 3S1 is not easily applied to the fastening tape 4. As described above, the application of the adhesive to the fastening tape 4 is less likely to occur, so that the bonding with other members due to the overflow of the adhesive or the joining of the skin or the clothing is less likely to occur, and the feeling of use is further improved.

Further, in the diaper 1, as shown in FIG. 2, one of the plurality of sealing joint portions 61 including the joint region 6 of the first joining region 6S and the second weak joining region 6W is pasted on the outer side of the side sheet 3 The edge 3S1 extends outward in the width direction (X direction). In other words, the plurality of second seal joint portions 612 constituting the second seal joint portion group 612G disposed in the second weak joint region 6W are disposed across the outer side edge 3S1 of the side sheet 3 . Therefore, when the diaper 1 is worn or used, the outer side edge 3S1 of the side panel 3 is not easily curled or bent, and the feeling of use is further improved.

Further, in the diaper 1, as shown in Fig. 2, the fastening tape 4 is attached to the vicinity of the end portion on the side of the back side portion B of the side panel 3, and is attached when the fastening tape 3 is stretched while being worn. The angle of inclination of the first second welded portion 612C disposed on the most lower portion C side of the plurality of second welded portions 612 of the second welded portion group 612G in the second weak joined region 6W of the joint region 6 2 The inclination angle of the imaginary line IL2 is substantially the same. When the fastening tape 3 is stretched while being worn, a load is applied in the direction along the second imaginary line IL2. When the second welded portion 612C on the side of the lowermost portion C which is the starting point of the load is peeled off, the inclination angle substantially coincides with the second imaginary line IL2, so that the amount of work required for peeling is maximized. The fastening tape 4 and the side panel 3 are not easily broken, and the wearing state of the diaper 1 can be maintained, and the feeling of use is improved.

Further, in the diaper 1, as shown in Fig. 3, a portion of the first joint region 6S of the joint region 6 and a portion of the outer side fixed end portion 33O of the elastic member 33, that is, an outer layer of the outer side fixed end portion 33O of the elastic member 33 is formed. One of the 36 parts overlaps. That is, the fastening tape is directly linked to the elastic member 33. Therefore, when the impact belt 4 is stretched while being worn, the impact of the elastic member 33 is also less likely to cause damage to the joint region 6, which is detrimental to the sense of use. small.

The disposable diaper according to the first aspect of the invention is not limited to the diaper 1 of the above-described embodiment, and can be appropriately changed.

For example, in the diaper 1 of the above embodiment, as shown in Fig. 2, the side panel 3 has stretchability, but may be non-stretchable. Further, the fastening tape 4 is attached only to the non-skin opposing surface (surface on the Q side) of the side panel 3, but may be attached only to the skin facing surface (surface on the P side) of the side panel 3.

Further, in the diaper 1 of the above-described embodiment, as shown in FIG. 2, one of the plurality of welded portions 61 in the joint portion 6 passes over the outer side edge 3S1 of the side sheet 3 and is outward in the width direction (X direction). Extend, but it does not extend.

Further, in the diaper 1 of the above-described embodiment, as shown in FIG. 2, the inclination angle of the plurality of second welded portions 612 constituting the second welded portion group 612G of the joint region 6 and the inclination angle of the second imaginary line IL2 are It is roughly the same, but it can be inconsistent.

Further, in the diaper 1 of the above-described embodiment, as shown in FIG. 2, the joint region 6 partially overlaps one of the outer side fixed end portions 33O of the elastic member 33 in the side panel 3, but may be disposed at the outer fixed end. The portion 33O is outside the width direction (X direction).

Further, in the diaper 1 of the above-described embodiment, as shown in FIG. 2, the plurality of second welded portions 612 constituting the second welded portion group 612G of the joint region 6 have the same inclination angles, but may be different. For example, in the diaper 1A of another embodiment shown in Fig. 5, when the fastening tape 3 is stretched during wearing, except for the form of the diaper 1, only a plurality of the welded portions 61 are disposed at the most width. a plurality of second sealing joints constituting the second sealing joint portion group 612G disposed on the outer side of the direction (X direction) and on the most back side B side, that is, the second weak joint region 6W disposed in the joint region 6 The inclination angle of one second sealing joint portion 612B disposed on the most back side portion B side in the portion 612 and the intersection point PU1 and the side panel 3 of the joining side panel 3 and the back side portion B side of the fastening tape 4 and the absorbent sheet The inclination angle of the third imaginary line IL3 of the intersection PU2 of the back side B side of the main body 2 is substantially the same. In addition, the second sealing joint portion 612B disposed on the side of the most back side portion B means that one or more half of the area covers the second weak joint region 6W. Seal the joint.

In the diaper 1A, when the fastening tape 3 is stretched during wearing, a load is applied in the direction along the second imaginary line IL2, and a load is applied in the direction along the third imaginary line IL3. However, the inclination angle of each of the second welding portion 612C on the lowermost C side and the second welding portion 612B on the most back side B side at the position which is the starting point of the load and the inclination angle of the second imaginary line IL2 The inclination angle of the third imaginary line IL3 is substantially the same. Therefore, the fastening tape 4 and the side panel 3 are not easily broken, and the wearing state of the diaper 1 can be maintained, and the feeling of use is further improved.

Hereinafter, the disposable diaper according to the present invention (second invention) will be described with reference to Figs. 6 to 9 based on the preferred first embodiment.

As shown in Fig. 6, the disposable diaper 1B (hereinafter also referred to as "diaper 1B") of the present embodiment is on both sides of the back side portion B of the rectangular absorbent body 2 from the liquid retaining absorbent body 23. The adhesive tape 4 is attached to the outer side portion 3S of the stretchable side panel 3 in which each of the portions 2S extends in the longitudinal direction (Y direction) of the main body.

As shown in Fig. 6, the diaper 1B is formed to be bilaterally symmetrical with respect to the center line CL. Therefore, in the following description, the left-right symmetrical portion will be mainly described on the right side.

In the present specification, the term "skin-facing surface" refers to the surface of the front and back sides of the members constituting the diaper 1B, which is placed on the skin side of the wearer, and is "P" in FIG. The same side of the side. In addition, the term "non-skin contrast surface" refers to the side opposite to the skin side of the wearer in the front and back sides of the members constituting the diaper 1B, and is on the "Q" side in FIG. The same side of the face.

Further, the "Y" direction shown in each drawing is the longitudinal direction (main body longitudinal direction) of the absorbent body 2 of the diaper 1B, and is a direction parallel to the center line CL, and the "X" direction diaper shown in each drawing is shown. The width direction (body width direction) of the absorbent body 2 of 1B is a direction perpendicular to the center line CL. Hereinafter, the diaper 1B will be specifically described.

As shown in FIG. 6, the absorbent body 2 has a rectangular shape elongated in the Y direction and includes When worn, it is located on the ventral side A of the wearer's ventral side, the back side B on the back side of the wearer, and the crotch portion C located on the crotch portion. The elastic side panels 3 and 3 are attached to the both side portions 2S and 2S of the absorbent body 2 in the Y direction in the back side portion B, and extend outward from the side edges 2S1 and 2S1 of the absorbent body 2 toward the X direction. The way to install.

As shown in Fig. 6, the absorbent body 2 is a vertically longer one in the Y direction, and includes a liquid retaining absorbent body 23, a front sheet 21 disposed on the skin facing side of the absorbent body 23, and a absorbent sheet. The non-skin opposing surface side outer layer composite sheet of the body 23 is divided into a front side portion A, a back side portion on the back side, and a crotch portion disposed between the front side portion and the back side portion. That is, the absorbent main body 2 includes a liquid permeable front sheet 21, a liquid impervious or liquid impervious (including water repellency) outer layer composite sheet 22, and two layers as shown in FIG. A liquid-retaining absorber 23 between the sheets 21 and 22. As shown in FIG. 6, the front sheet 21 and the outer layer composite sheet 22 cover the entire surface of the skin opposite surface of the absorbent body 23 and the non-skin opposing surface, respectively, extending from the periphery of the absorber 23, and extending. In part, it is fixed by welding by an adhesive such as hot melt or heat sealing. The front sheet 21 is the same length as the outer layer composite sheet 22 in the Y direction, but is formed shorter than the outer layer composite sheet 22 in the X direction. The outer layer composite sheet 22 is formed to have the same shape as that of the absorbent body 2.

Moreover, the side sheet 24 is disposed in the side portion 2S in the Y direction of the absorbent main body 2 with the front sheet 21 interposed therebetween. The side sheet 24 is the skin facing surface side of the front sheet 21, and is disposed and fixed over the entire area of the side portion 2S in the Y direction. The end portion of the side sheet 24 in the X direction (near the center line CL) is a free end, and the elastic member 25 for forming the three-dimensional gathers is disposed in the vicinity of the free end of the lower portion C in the Y direction. When worn, the portion of the specific width from the free end is separated from the front sheet 21 by the contraction force of the elastic member 25 to form a three-dimensional gather.

Moreover, the side sheet 24 and the outer layer composite sheet 22 which extend outward in the X direction are joined to the side portion 2S of the absorbent main body 2 in the Y direction, and a burring portion is formed. In the diaper 1B, as shown in FIG. 6, the leg gathers forming elastic member 26 is disposed in a state of being elongated in the Y direction. The cuff portion is fixed to the crotch portion of the crotch portion C, and when worn, the leg gathers are formed by the contraction force of the elastic member 26.

As shown in Fig. 6, on both side portions 2S and 2S of the back side portion B of the absorbent main body 2, stretchable side panels 3 and 3 extending outward in the width direction (X direction) are attached to the stretchable side panels. A fastening tape 4 is attached to the outside of the width direction (X direction) of 3 and 3. When the diaper 1B is faced with the arrangement relationship between the elastic side panel 3 and the fastening tape 4, as shown in FIG. 7, the PU1 is connected to the upper side of the Y-direction of the absorbent body 2 and the stretchable side panel 3. When the imaginary line IL2 of the PU2 is intersected with the elastic side panel 3 and the adhesive tape 4 in the Y direction, the adhesive sheet 3 is attached to the stretchable side panel 3 so as to have the region T1 over the imaginary line IL2 in the Y direction. With 4. Alternatively, as shown in FIG. 7, when the imaginary line IL3 connecting the absorptive body 2 and the elastic side panel 3 in the Y direction lower intersection point PD1 and the elastic side panel 3 and the hooking belt 4 in the Y direction lower intersection point PD2 is extracted, The fastening tape 4 is attached to the stretchable side panel 3 so as to have a region T2 that passes over the imaginary line IL3 in the Y direction.

Further, in the diaper 1B, as shown in FIG. 7, the stretchable side panel 3 and the adhesive are fixed so as to have two regions of the region T1 that passes over the Y direction and the region T2 that passes below the Y direction. The tape 4 may be fixed to the stretchable side panel 3 and the fastening tape 4 so as to have any of the region T1 that passes over the Y direction and the region T2 that passes below the Y direction.

In the diaper 1B, as shown in FIG. 8, on the non-skin opposing surface of the composite sheet 22 disposed on the side portion 2S, the sides of the self-absorbent body 2 are 2S1 and 2S1 by various known methods. The stretchable side panel 3 is fixed to extend outward in the X direction. Further, in the diaper 1B, the stretchable side panel 3 is fixed to the non-skin opposing surface of the outer layer composite sheet 22, but may be disposed to be fixed to the side sheet 24 and the outer layer composite sheet 22 disposed on the side portion 2S. between.

The stretchable side panel 3 is attached to the diaper 1B, and a plurality of strips are stretched in the X direction between the skin side sheet 31 located on the opposite side of the skin and the non-skin side sheet 32 located on the non-skin facing side. The elastic member 33 is formed. Moreover, the stretchable side panel 3 is along the length of the body The length of the outer side portion 3s in the (Y direction) is formed to be longer than the length of the first fastening region 4 (the Y direction) of the fastening tape 4 described below. As will be described in detail, the stretchable side panel 3 in the diaper 1B has a rectangular shape in a state of being developed in a planar shape, or the outer side of the stretchable side panel 3 in the longitudinal direction (Y direction) of the main body. The length of the side edge is longer than the length of the body of the first joining region 6 in the longitudinal direction (Y direction) of the fastening tape 4, and may be trapezoidal or curved, forming the skin side of the stretchable side panel 3. The sheet 31 and the non-skin side sheet 32 are also formed in the same shape as the plan view of the stretchable side sheet 3 in a state of being flattened. The plurality of elastic members 33 are respectively arranged along the X direction of the diaper 1B and extend in the X direction. Further, the plurality of elastic members 33 in the stretchable side panel 3 are disposed in the diaper 1B at substantially equal intervals in the Y direction.

As described above, the stretchable side panel 3 of the diaper 1B is formed by disposing a plurality of elastic members 33 in a plurality of filaments between the two nonwoven fabrics (the skin side sheet 31 and the non-skin side sheet 32), but the stretchability is formed. The side panel 3 may be formed by disposing a fixed elastic film or a mesh containing an elastic body between the two non-woven fabrics (the skin side sheet 31 and the non-skin side sheet 32) instead of the filament-shaped elastic member 33. Complex. Further, in the case where the filament-shaped elastic member 33 is used, a narrow band shape such as a rectangular shape is included in addition to a substantially circular or square cross section.

Further, in the stretchable side panel 3 of the diaper 1B, as shown in Figs. 7 and 8, the skin side sheet 31 and the non-skin side sheet 32 constituting the stretchable side panel 3 are formed in the same shape and the same size. However, the skin side sheet 31 and the non-skin side sheet 32 may have different lengths such as the extension length of the side edge 2S1 of the self-absorbent body 2. When the stretch side panel 3 is formed from the skin side sheet 31 and the non-skin side sheet 32 having different extension lengths from the side edge 2S1, the outer side of the elastic side panel 3 is laterally exposed by a piece of skin in the X direction. The side sheet 31 or the non-skin side sheet 32 is formed. Therefore, the softness of the outer side portion 3S of the stretchable side panel 3 is improved.

The elastic member 33 of the filament shape disposed on the stretchable side panel 3 has a width (a dimension in the Y direction) from the viewpoint of improving the flexibility of the stretchable side panel 3 or securing the stretchability. The diameter is preferably 0.1 mm or more and 2 mm or less, more preferably 0.1 mm or more and 1 mm or less. Moreover, the number of the filament-shaped elastic members 33 disposed on the stretchable side panel 3 is preferably one or more and 25 or less, more preferably three or more and twenty or less. Further, the elongation can be appropriately selected from the prior art, and the one elastic member 33 having a linear stress of 0.1 N or more and 1 N or less when the elongation is 100% is preferably an elongation of 50% or more and 300%. The state in which the following range is extended is fixed, and it is preferable to arrange and fix in a state in which the range is extended in a range of 100% or more and 250% or less. Further, the elongation is an elongation and the ratio of the length to the natural length, for example, when the length of 10 cm is extended to 20 cm, the elongation is set to 100%.

Further, in the case where a fixed elastic film or a mesh containing an elastic body is provided instead of the filament-shaped elastic member 33 to form the stretchable side sheet 3, it is preferable to extend to an elongation of 100% every 25 mm. The mesh having a width of 3 N/25 mm or more and 25 N/25 mm or less is formed by being fixed in a state in which the elongation is 50% or more and 300% or less, and more preferably 100% or more and 250%. The state in which the following range is extended is formed by being fixed.

The plurality of filament-shaped elastic members 33 in the stretched state are fixed between the skin-side sheet 31 and the non-skin side sheet 32 via a plurality of adhesives (not shown) extending in the Y direction while intersecting the elastic members 33. The skin side sheet 31 and the non-skin side sheet 32 are directly joined to each other via the respective adhesives (not shown) at a portion where the elastic member 33 is not interposed. It is preferable that a plurality of adhesives (not shown) intersect with all of the filament-shaped elastic members 33 extending in the X direction and extend in the Y direction, and it is preferable to extend the entire length of the stretchable side sheets 3 in the Y direction. The subsequent agent (not shown) is provided with a plurality of strips disposed at substantially equal intervals in the X direction. The stretchable side panel 3 is coated with a plurality of adhesives (not shown) on either or both of the skin side sheet 31 and the non-skin side sheet 32 by various known methods. After coating, These sheets 31 and 32 are superposed and pressurized, thereby forming a plurality of elastic members 33 in a stretched state. As shown in FIG. 7 and FIG. 8, the elastic structure in the stretchable side panel 3 thus formed The member 33 has a fixed end portion 33I and an outer fixed end portion 33O on the inner side in the X direction (near the center line CL), and the fixed end portion 33I and the outer fixed end portion 33O on the inner side (near the center line CL), and has no contraction force. Becomes a non-scalable state. The length of the outer fixed end portion 33O in the X direction is preferably in the range of 10% or more and 40% or less of the total length of the elastic member 33 in the X direction in the natural state of the stretchable side sheet 3 shown in FIG. 7 . Further, it is preferably in the range of 15% or more and 35% or less. The length of the inner fixed end portion 33I in the X direction is also the same as the length of the outer fixed end portion 33O in the X direction. Further, the stretchable side panel 3 may be used in combination with fixing by an adhesive (not shown), or may be combined and fixed by heat sealing or the like.

In the diaper 1B, the skin-side sheet 31 of the stretchable side panel 3 has a plurality of filament-shaped elastic members 33 extending outward in the X direction from the X-direction outer side fixed end portion 33O as shown in Figs. 7 and 8 . Similarly to the extension portion 31S, the non-skin side sheet 32 has an extending portion 32S extending outward in the X direction from the outer side fixed end portion 33O of the plurality of elastic members 33 in the X direction. The extending portions 31S and 32S are integrally fixed by applying an adhesive agent by various known methods and then pressurizing them. In view of the fact that the outer side portion 3S of the stretchable side panel 3 is not easily curled during use, the extension portions 31S and 32S are fixed to each other except for fixing by an adhesive, and may be welded and fixed by a seal, or may be combined. Wait.

When the fastening tape 4 provided on the outer side portion 3S of the elastic side panel 3 is described in detail, the fastening tape 4 includes the tape substrate sheet 41 and has a plurality of outer sides in the X direction of the tape substrate sheet 41. The hooks 42 of the engaging protrusions. The fastening tape 4 is folded before use, and is used as shown in Fig. 8 when it is used. As shown in Fig. 7, the fastening tape 4 of the diaper 1B has a rectangular shape elongated in the X direction in the unfolded state. The fastening tape 4 is formed by fixing the hook material 42 to the outer side in the X direction of the tape substrate sheet 41 which is formed in the same shape as the plan view of the fastening tape 4 . Further, on the outer surface of the abdominal portion A of the diaper 1B, a clasp sheet 5 for fixing the hook material 42 of the fastening tape 4 is provided.

When the fastening of the fastening tape 4 and the elastic side panel 3 is described in detail, the fastening tape 4 is attached to the non-skin opposing surface (surface of the Q side) of the elastic side panel 3 as shown in FIG. Specifically In the diaper 1B, as shown in FIG. 8, the inner side (near the center line CL) side of the fastening tape 4 in the X direction is attached only to the relatively filamentous shape of the non-skin side sheet 32 constituting the stretchable side panel 3. The outer side fixed end portion 33O of the elastic member 33 is extended by the outer side extending portion 32S in the X direction, and is attached only to the non-skin opposing surface (the side on the Q side) of the extending portion 32S.

Further, as shown in FIG. 7 and FIG. 8 , the fastening tape 4 is spaced apart from the outer side edge 3S1 of the elastic side panel 3 in the Y direction by the distance S from the side of the absorbent body 2, and is stretched and contracted via the first joining region 6 . The side panels 3 are joined. Therefore, as shown in FIG. 7 and FIG. 8, between the first joining region 6 and the outer side edge 3S1 of the stretchable side panel 3, the non-joining region 7 of the adhesive tape 4 and the stretchable side panel 3 is not joined to Y. The direction is continuously formed. When the first joining region 6 is specifically described, the first joining region 6 is formed in the diaper 1B by heat sealing or ultrasonic sealing as shown in FIG. 8 and formed by an adhesive. As described above, if it is formed by heat sealing or ultrasonic sealing, the adjustment of the first joining region 6 is facilitated, and the adhesion strength between the fastening tape 4 and the stretchable side panel 3 is easily improved. Moreover, when formed by an adhesive agent, the first joining region 6 is excellent in flexibility. In the diaper 1B, the fastening tape 4 and the stretchable side panel 3 are fixed by welding and an adhesive, and the bonding strength between the fastening tape 4 and the stretchable side panel 3 is further improved.

More specifically, as shown in FIGS. 7 and 8 , the first joining region 6 includes a welded portion 61 in which the fastening tape 4 and the stretchable side sheet 3 are welded by heat sealing or ultrasonic sealing, and an unfused fastener. The belt 4 and the non-welding portion 62 of the stretchable side panel 3. As shown in Fig. 7, the first joining region 6 includes a plurality of welded portions 61 having a small shape and a welded portion 61G which are regularly arranged in the Y direction, and the welded portion group 61G is arranged in plural in the main body width direction (X direction). The adjacent welded portions 61 and 61 forming the other welded portion group 61G are arranged to be shifted from each other so as not to be aligned in the body width direction (X direction). As described in detail, the welded portion 61 of the diaper 1B includes the first welded portion 611 having a longitudinal length with respect to the Y direction and the lengthwise direction of the first welded portion 611 as shown in FIG. 2 welded portion 612. Here, the orientation of the first welding portion 611 is symmetrically arranged with respect to the virtual welding line IL1 (see FIG. 7) extending parallel to the center line CL. Y direction angle and 2nd The angles of the welded portions 612 with respect to the Y direction are the same at the same angle. As shown in Fig. 7, the welded portion group 61G of the diaper 1B includes the first welded portion group 611G and the second welded portion 612 which are regularly arranged at intervals in the Y direction, and the second welded portion 612 is regularly arranged in the Y direction. The second welded portion group 612G is arranged at intervals. Further, as shown in FIG. 7, in the first joining region 6 of the diaper 1B, the first welded portion group 611G and the second welded portion group 612G are alternately arranged in two rows in the X direction. Therefore, the adjacent first welded portion 611 and the second welded portion 612 which form the other welded portion group 61G (the first welded portion group 611G or the second welded portion 612) are not disposed at parallel positions in the X direction. The Y direction is staggered. Further, as shown in FIG. 7, the adjacent welded portions 61 (the first welded portion 611 and the second welded portion 612) are non-welded portions 62 therebetween. As described above, the first bonding region 6 is excellent in flexibility by having the non-welding portion 62. Further, since the non-welded portion 62 is provided, the crease is not easily formed in the welded portion 61, and the first joining region 6 is excellent in flexibility.

Further, in the diaper 1B, as shown in FIG. 8, the first joining region 6 includes an adhesive bonding portion 63 to which the fastening tape 4 and the stretchable side sheet 3 are bonded by an adhesive. The adhesive bonding portion 63 is aligned with the width of the four rows of welded portion groups 61G (the two rows of the first welded portion group 611G and the two rows of the second welded portion group 612G) in the X direction, and continuously extends in the Y direction in parallel with the center line CL. The entire length of the adhesive tape 4 in the Y direction is formed. Therefore, the non-joining region 7 having a fixed width (the same length as the interval S) is continuously formed in the Y direction in parallel with the center line CL. Further, the adhesive bonding portion 63 of the diaper 1B coincides with the width of the four rows of welded portion groups 61G in the X direction. However, as long as the non-joining region 7 can be secured, the width of the four rows of welded portion groups 61G does not necessarily have to match.

The length of the stretchable side panel 3 of the region where the stretchable side panel 3 overlaps the fastening tape 4 (the region where the first joining region 6 and the non-joining region 7 are joined) is longer than the length of the stretchable region 3, and the adhesive tape is longer than the overlapping region 4 is the length in the Y direction. Here, the length in the Y direction refers to the length of the portion of the stretchable side panel 3 or the widest portion of the portion of the fastening tape 4 in the region where the stretchable side panel 3 and the fastening tape 4 overlap. Improves operability and introverts in terms of non-destructive wearing feeling From the viewpoint of the action of the force on the opposite side of the skin, the length of the stretchable side panel 3 in the Y direction of the overlap region is preferably 1.2 times or more the length of the hook tape 4 in the overlap region in the Y direction. 3.5 times or less, and more preferably 1.4 times or more and 3.0 times or less.

From the viewpoint of the strength of the adhesion, it is preferable that the overlapping region is in a range of 10% or more and 50% or less with respect to the total area of the stretchable side sheets 3 in the case where the stretchable side sheets 3 are in a natural state in plan view, and further preferably It is in the range of 10% or more and 40% or less.

The first bonding region 6 is preferably in a range of 40% or more and 90% or less with respect to the area of the overlapping region, and is preferably 50% or more and 85% in terms of the securing of the non-joining region 7 and the strength of the bonding. The following range.

The non-joining region 7 is preferably in a range of 10% or more and 50% or less with respect to the area of the overlapping region from the viewpoint of maintaining the degree of freedom of the side edge portion of the stretchable side panel 3 at the time of wearing, and further preferably More than 15% and less than 40%.

The shape of the welded portion 61 (the first welded portion 611 and the second welded portion 612) is not particularly limited, and may be, for example, a circular shape, a rhombus shape, a triangular shape, or a polygonal shape, in addition to an elliptical shape such as a diaper 1B. The shape. The sealing pattern area of one welding portion 61 (one first welding portion 611 or one second welding portion 612) is preferably 2 mm ² or more and 30 mm ² or less from the viewpoint of the non-destructive wearing feeling and the subsequent strength improvement. Further, it is preferably ² mm ² or more and 20 mm ² or less. From the same viewpoint, the distance between the first welded portion 611 adjacent in the Y direction or the second welded portion 612 adjacent in the Y direction is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm or less. From the same viewpoint, the distance between the adjacent adjacent welded portions 61 (the distance between the first welded portion 611 and the second welded portion 612) is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm or less. Moreover, from the same viewpoint, the number of welded portions 61 (first fusion welded portion 611 and the second portion 612) is preferably configured of a / ² or less than ² cm and 16 / cm, and further is excellent 2 pieces/cm ² or more and 10 pieces/cm ² or less. Further, from the same viewpoint, the ratio of the total seal pattern area of the plurality of welded portions 61 (the first welded portion 611 and the second welded portion 612) to the area of the first joined region 6 is preferably 10% or more. 70% or less, and further preferably 10% or more and 50% or less.

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

As the front 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 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 outer layer composite sheet 22, a resin film for liquid impermeability or liquid impermeability (including water repellency) can be laminated with non-woven fabrics formed by various methods (for example, hot air non-woven fabric, spunbonded non-woven fabric, water needle non-woven fabric, needle). Rolling of non-woven fabrics, etc.). Further, as the absorber 23, an aggregate of fibers such as a pulp fiber containing a water-permeable tissue or a nonwoven fabric (which may be a nonwoven fabric) or an absorbent core obtained by holding the water-absorbent polymer particles therein may be used. Body and so on. As the side sheet 24 constituting the three-dimensional protection, a laminated sheet of a film, a nonwoven fabric, a woven fabric, or the like can be used.

The skin-side sheet 31 and the non-skin side sheet 32 which constitute the stretchable side panel 3, and the tape base material 42 of the fastening tape 4 can be used without any particular limitation for absorption by a disposable diaper or a menstrual napkin. Various sheets of sexual goods.

For example, as the skin side sheet 31, the non-skin side sheet 32, and the belt base material 42, a laminated sheet of a nonwoven fabric, a woven fabric, a film, or the like can be used.

As the filament-shaped elastic member 33 constituting the stretchable side panel 3, the elastic member 25 constituting the three-dimensional shield, and the leg elastic member 26, natural rubber, polyurethane, polystyrene-polyisoprene can be used. A filament-like or rope-like elastic member such as an olefin copolymer, a polystyrene-polybutadiene copolymer, or a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene. The plurality of elastic members 33 disposed on the stretchable side panel 3 are preferably arranged at the same elongation rate from the viewpoint of the manufacturing cost or the simplification of the manufacturing steps.

Preferred examples of the adhesive for bonding the adhesive between the members to form the adhesive for forming the adhesive bonding tape 4 and the adhesive bonding portion 63 of the elastic side panel 3 include amorphous polyolefin and ethylene. -vinyl acetate copolymer (EVA), ethylene-acrylate copolymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene/butylene-styrene Thermoplastic polymers such as segment copolymer (SEBS), styrene-ethylene/propylene-styrene block copolymer (SEPS), and the like, and the like. The subsequent agent is preferably a hot melt type.

The hook material 42 and the tape substrate sheet 41 that form the fastening tape 4 are generally used without any particular limitation as long as they can be used for absorbent articles such as disposable diapers. For example, as the hook material 42, "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 41, a synthetic resin such as polyethylene or polypropylene or polyethylene terephthalate, or a composite material containing two or more kinds of these synthetic resins, a nonwoven fabric or the like can be used.

The effect of the disposable diaper 1B (hereinafter also referred to as "diaper 1B") of the first embodiment of the present invention (the second invention) will be described.

In the diaper 1B, as shown in FIGS. 7 and 8, the fastening tape 4 is attached only to the non-skin opposing surface (the side of the Q side) of the stretchable side panel 3, and the adhesive fastening tape 4 and the stretchable side panel 3 are attached. The non-joining region 7 is continuously formed in the Y direction between the first joint region 6 and the outer side edge 3S1 of the stretchable side panel 3. Since the non-joining region 7 is formed, when the diaper 1B is worn, if the adhesive tape 4 is stretched by hand and the stretchable side panel 3 is stretched, the outer peripheral portion of the stretchable side panel 3 is as shown in FIG. It is easy to face the opposite side of the skin (the side of the P side). The hook material 42 of the fastening tape 4 on the back side B side is pressed against the buckle sheet 5 on the side of the front side A to be fixed in a state in which it faces the skin facing surface (surface on the P side). When the clothes are attached to the diaper 1B, it is difficult to catch the outer peripheral edge portion of the stretchable side panel 3, and the feeling of use is improved.

Next, the disposable diaper according to the second to sixth embodiments of the present invention (second invention) will be described. The manner in which the fastening tape 4 of the disposable diaper 1C to 1F of the second to sixth embodiments is fixed to the elastic side panel 3 is different from that of the diaper 1B of the first embodiment. The diapers 1C to 1F of the second to sixth embodiments are mainly different from the diaper 1B of the first embodiment. In the description, the same reference numerals will be given to the same aspects, and the description will be omitted. The description of the diaper 1B of the first embodiment will be appropriately applied to the aspects which are not particularly mentioned.

The fixing of the fastening tape 4 of the diaper 1C and the elastic side panel 3 will be described in detail.

In the diaper 1C, similarly to the diaper 1B, as shown in FIG. 10, the inner side (near the center line CL) side of the fastening tape 4 in the X direction is attached only to the non-elastic side sheet 3 via the first joining region 6. The outer side fixed end portion 33O of the filament-shaped elastic member 33 in the skin side sheet 32 is extended by the outer side extending portion 32S in the X direction, and is attached only to the non-skin opposing surface of the extending portion 32S via the first joining portion 6 (Q Side of the side). In this manner, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3.

Further, in the diaper 1C, similarly to the diaper 1B, the fastening tape 4 and the stretchable side panel 3 are fixed by welding and an adhesive.

As shown in FIG. 10, the first joining region 6 of the diaper 1C includes a welded portion 61 and a non-welded portion 62 similarly to the diaper 1B.

As shown in FIG. 10, the welded portion 61 of the diaper 1C includes only the first welded portion 611 having a longitudinal length with respect to the Y direction. In the diaper 1C, in the first joining region 6, the first welded portion group 611G extending in the Y direction formed by intermittently disposing the first welded portion 611 in the Y direction is formed in two rows in the X direction. The first welded portion 611 and the first welded portion 611 which are adjacent to each other of the other first welded portion groups 611G adjacent to each other in the X direction are not arranged in a staggered manner, and are disposed at positions parallel to each other in the X direction. Further, as shown in FIG. 10, the adjacent welded portions 61 are formed as non-welded portions 62.

In the diaper 1C, the first joining region 6 includes the adhesive bonding portion 63 in which the fastening tape 4 and the stretchable side panel 3 are bonded together with an adhesive, similarly to the diaper 1B. The adhesive bonding portion 63 is formed so as to substantially coincide with the width of the two rows of the welded portion groups 611G in the X direction, and continuously extends in the Y direction in parallel with the center line CL in the Y direction of the fastening tape 4 in the Y direction. Therefore, the non-joining region 7 having a fixed width (the same length as the interval S) is continuously formed in the Y direction in parallel with the center line CL.

When the effect of using the above diaper 1C is explained, the diaper 1C is used. The effect is the same as that of the diaper 1B.

Next, the fixing of the fastening tape 4 of the diaper 1D and the elastic side panel 3 will be described in detail.

In the diaper 1D, the first joining region 6 partially overlaps one of the outer side fixing end portions 33O of the filament-shaped elastic member 33 in the stretchable side panel 3 as shown in Fig. 11 . In the diaper 1D, the side of the inside of the X-direction of the fastening tape 4 (near the center line CL) passes through the first joining region 6 and the stretchable side panel 3 is formed corresponding to the position of the fixed end portion 33O of the elastic member 33. One of the positions of the non-skin side sheet 32 and the outer side fixed end portion 33O of the non-skin side sheet 32 in the non-skin side sheet 32 are attached by the extending portion 32S on the outer side in the X direction. Further, the inner side of the X-direction of the fastening tape 4 (near the center line CL) is attached to only one of the positions of the non-skin side sheet 32 corresponding to the position of the outer fixed end portion 33O via the first joining region 6 and extends. The non-skin contrast surface (the side of the Q side) of each of the 32S parts. In this manner, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3.

Further, in the diaper 1D, similarly to the diaper 1B, the fastening tape 4 and the stretchable side panel 3 are fixed by welding and an adhesive.

As shown in FIG. 11, the first joining region 6 of the diaper 1D includes a welded portion 61 and a non-welded portion 62 similarly to the diaper 1B.

As shown in FIG. 11, the welded portion 61 of the diaper 1D includes only the first welded portion 611 having a longitudinal length with respect to the Y direction. In the diaper 1D, in the first joining region 6, the first welded portion group 611G extending in the Y direction, which is formed by intermittently disposing the first welded portion 611 in the Y direction, is formed in two rows in the X direction. The first welded portion 611 and the first welded portion 611 which are adjacent to each other of the other first welded portion group 611G adjacent to each other in the X direction are not arranged in a staggered manner, and are disposed at parallel positions in the X direction. Further, as shown in FIG. 11, the adjacent welded portions 61 are formed as non-welded portions 62.

In the diaper 1D, the first joining region 6 includes the adhesive bonding portion 63 to which the fastening tape 4 and the stretchable side panel 3 are bonded by an adhesive, similarly to the diaper 1B. Adhesive joint 63 is formed in the X direction substantially in line with the width of the two rows of welded portion groups 611G, and continuously extends in the Y direction in parallel with the center line CL in the Y direction of the fastening tape 4 in the Y direction. Therefore, the non-joining region 7 having a fixed width (the same length as the interval S) is continuously formed in the Y direction in parallel with the center line CL.

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

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

In the diaper 1D, as shown in FIG. 11, the first joining region 6 partially overlaps one of the outer side fixing end portions 33O of the filament-shaped elastic member 33 in the stretchable side panel 3. Therefore, the joint strength of the outer side fixed end portion 33O of the elastic member 33 can be improved.

Next, the fixing of the fastening tape 4 of the diaper 1E and the elastic side panel 3 will be described in detail.

In the diaper 1E, similarly to the diaper 1B, as shown in FIG. 12, the inner side (near the center line CL) side of the fastening tape 4 in the X direction is attached only to the non-reinforcing side sheet 3 via the first joining region 6. The outer side fixed end portion 33O of the filament-shaped elastic member 33 in the skin side sheet 32 is extended by the outer side extending portion 32S in the X direction, and is attached only to the non-skin opposing surface of the extending portion 32S via the first joining portion 6 (Q Side of the side). In this manner, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3.

Further, in the diaper 1E, the fastening tape 4 and the stretchable side panel 3 are fixed only by welding.

As shown in FIG. 12, the first joining region 6 of the diaper 1E includes a welded portion 61 and a non-welded portion 62 similarly to the diaper 1B.

As shown in FIG. 12, the welded portion 61 of the diaper 1E includes only the third long welded portion 613 that extends in parallel with the X direction. In the diaper 1E, in the first joining region 6, the third welded portion 613G which is formed by intermittently arranging the third welded portion 613 in the Y direction and protruding outward in the X direction has two rows formed in the X direction. . Furthermore, as shown in FIG. 12, adjacent welded portions 61 are adjacent to each other. This becomes a non-welding portion 62. As shown in Fig. 12, the first joining region 6 of the diaper 1E is protruded outward in the X direction by the position of the center line CL3 extending in the longitudinal direction of the fastening tape 4 by the two rows of the welded portion group 613G. shape. Therefore, the non-joining region 7 of the diaper 1E has a shape that is recessed outward in the X direction. Specifically, the non-joining region 7 of the diaper 1E is formed so as to gradually increase in the X direction from the bottom of the center line CL3 of the fastening tape 4 toward the upper and lower directions of the center line CL3. The non-joining region 7 of the diaper 1E thus formed is continuously formed in the Y direction, and the end portions 7E and 7E of the non-joining region 7 in the Y direction in the non-joining region 7 are enlarged.

The first joining region 6 of the diaper 1E is preferably in a range of 40% or more and 90% or less with respect to the area of the overlapping region, and more preferably 50% or more, from the viewpoint of the securing of the non-joining region 7 and the strength of the bonding. And the range of 85% or less.

The non-joining region 7 of the diaper 1E is preferably in a range of 10% or more and 50% or less with respect to the area of the overlapping region, from the viewpoint of maintaining the degree of freedom of the side edge portion of the stretchable side panel 3 at the time of wearing. Further, it is preferably in the range of 15% or more and 40% or less.

The shape of the welded portion 61 (the third welded portion 613) is not particularly limited, and may be any shape such as a circle, a rhombus, a triangle, or a polygon, in addition to an elliptical shape such as a diaper 1E. The third welded portion 613 (welded portion 61) has a seal pattern area, a space in the Y direction, a ratio of the number of the seals, and a ratio of the total seal pattern area to the welded portion 61 of the diaper 1B (the first welded portion 611). The second welded portion 612) is the same.

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

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

In the diaper 1E, the interval between the non-joining regions 7 is enlarged in the Y-direction both end portions 7E and 7E in the non-joining region 7 as shown in Fig. 12 . Therefore, when the diaper 1E is worn, if the adhesive tape 4 is stretched by hand and the stretchable side panel 3 is stretched, the outer peripheral edge portion of the stretchable side panel 3 is further apt to face. The feeling of use is further improved by the side of the skin facing the side (the side of the P side).

Moreover, as shown in FIG. 12, the first joining region 6 of the diaper 1E has a shape that protrudes outward in the X direction. Therefore, when the diaper 1E is worn, when the fastening tape 4 is stretched by hand, the stretching force applied to the first joining region 6 is easily dispersed, and damage can be prevented.

Next, the fixing of the fastening tape 4 of the diaper 1F and the elastic side panel 3 will be described in detail.

In the diaper 1F, similarly to the diaper 1B, as shown in FIG. 13, the inner side (near the center line CL) side of the fastening tape 4 in the X direction is attached only to the non-elastic side sheet 3 via the first joining region 6. The outer side fixed end portion 33O of the filament-shaped elastic member 33 in the skin side sheet 32 is extended by the outer side extending portion 32S in the X direction, and is attached only to the non-skin opposing surface of the extending portion 32S via the first joining portion 6 (Q Side of the side). In this manner, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3.

Further, in the diaper 1F, the fastening tape 4 and the stretchable side panel 3 are fixed only by the adhesive.

The first joining region 6 of the diaper 1F includes an adhesive bonding portion 63 in which the fastening tape 4 and the stretchable side panel 3 are joined by an adhesive. The adhesive bonding portion 63 is formed continuously over the entire length of the fastening tape 4 in the Y direction in the Y direction. More specifically, as shown in FIG. 13, the first joining region 6 of the diaper 1F is formed by the adhesive bonding portion 63, and the position of the center line CL3 extending in the longitudinal direction of the fastening tape 4 is apex. The shape of the outer side of the direction. Therefore, the non-joining region 7 of the diaper 1F has a shape that is recessed outward in the X direction. Specifically, the non-joining region 7 of the diaper 1F is formed so as to gradually expand from the bottom of the center line CL3 of the fastening tape 4 toward the upper and lower directions of the center line CL3 and in the X direction. The non-joining region 7 of the diaper 1F thus formed is continuously formed in the Y direction, and the end portions 7E and 7E of the non-joining region 7 in the Y direction in the non-joining region 7 are enlarged.

From the viewpoint of the strength, the first joining region 6 of the diaper 1F is preferably in a range of 50% or more and 90% or less with respect to the area of the overlapping region, and more preferably 60%. Up and below 90% range.

The non-joining region 7 of the diaper 1F is preferably in a range of 10% or more and 50% or less with respect to the area of the overlapping region, from the viewpoint of maintaining the degree of freedom of the side edge portion of the stretchable side panel 3 at the time of wearing. Further, it is preferably in the range of 10% or more and 40% or less.

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

The effect of the diaper 1F will be described with respect to the effect of the diaper 1B. The effect of the diaper 1B is appropriately applied as in the case of the diaper 1B, unless otherwise specified.

In the diaper 1F, the interval between the non-joining regions 7 is enlarged in the Y-direction both end portions 7E and 7E in the non-joining region 7 as shown in Fig. 13 . Therefore, when the diaper 1F is worn, when the adhesive tape 4 is stretched by hand and the stretchable side panel 3 is stretched, the outer peripheral edge portion of the stretchable side panel 3 is more likely to face the skin facing surface (the side of the P side). Therefore, the sense of use is further improved.

Moreover, since the first joining region 6 of the diaper 1F is formed only by the adhesive, the softness is improved, and as shown in Fig. 13, the shape is convex outward in the X direction. Therefore, when the diaper 1F is worn, the hand is used. When the fastening tape 4 is stretched, the stretching force applied to the first joining region 6 is easily dispersed, and damage can be prevented.

Next, the fixing of the fastening tape 4 of the diaper 1G and the elastic side panel 3 will be described in detail.

In the diaper 1G, similarly to the diaper 1B, as shown in FIG. 14, the inner side (near the center line CL) side of the fastening tape 4 in the X direction is attached only to the non-elastic side sheet 3 via the first joining region 6. The outer side fixed end portion 33O of the filament-shaped elastic member 33 in the skin side sheet 32 is extended by the outer side extending portion 32S in the X direction, and is attached only to the non-skin opposing surface of the extending portion 32S via the first joining portion 6 (Q Side of the side). In this manner, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3.

Further, in the diaper 1G, the fastening tape 4 and the stretchable side panel 3 are fixed only by the adhesive.

The first joining region 6 of the diaper 1G includes an adhesive bonding portion 63 to which the fastening tape 4 and the stretchable side panel 3 are bonded by an adhesive. The adhesive bonding portion 63 is continuously formed in the Y direction continuously over the entire length of the fastening tape 4 in the Y direction. More specifically, as shown in FIG. 14, the first joining region 6 of the diaper 1G is formed at a position above the center line CL3 extending in the longitudinal direction of the fastening tape 4 by the adhesive bonding portion 63. The shape of the apex that protrudes outward in the X direction. Therefore, the non-joining region 7 of the diaper 1G has a shape that is recessed outward in the X direction. Specifically, the non-joining region 7 of the diaper 1G has a bottom portion at a position above the center line CL3 of the fastening tape 4, and is formed in such a manner that the interval from the bottom to the center line CL3 is gradually increased in the X direction. . The non-joining region 7 of the diaper 1G thus formed is continuously formed in the Y direction, and the interval between the non-joining regions 7 becomes the narrowest above the center line CL3 of the fastening tape 4.

The first joining region 6 of the diaper 1G is preferably in a range of 50% or more and 90% or less with respect to the area of the overlapping region, and more preferably in a range of 60% or more and 90% or less, from the viewpoint of the strength.

The non-joining region 7 of the diaper 1G is preferably in a range of 10% or more and 50% or less with respect to the area of the overlapping region, from the viewpoint of maintaining the degree of freedom of the side edge portion of the stretchable side panel 3 at the time of wearing. Further, it is preferably in the range of 10% or more and 40% or less. Thus, the range of the first joining region 6 as the diaper 1G is the same as the range of the first joining region 6 of the diaper 1F.

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

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

In the diaper 1G, the interval between the non-joining regions 7 becomes the narrowest above the center line CL3 of the fastening tape 4 as shown in Fig. 14 . Therefore, when the diaper 1G is worn, if the adhesive tape 4 is stretched by hand and the stretchable side panel 3 is stretched, the outer peripheral edge portion of the stretchable side panel 3 is particularly lowered downward. It is easy to face the side of the skin facing surface (the side of the P side), so the feeling of use is further improved.

In addition, since the first joining region 6 of the diaper 1G is formed only by the adhesive, the softness is improved and the shape is convex outward in the X direction as shown in Fig. 14. Therefore, when the diaper 1G is worn, the hand is used. When the fastening tape 4 is stretched, the tensile force applied to the first joining region 6 is easily dispersed to prevent breakage.

The disposable diaper of the present invention (second invention) is not limited to the diaper 1B of the above-described embodiment, and can be appropriately changed.

The disposable diaper of the present invention (second invention) is not limited to any of the diapers 1B to 1G of the first to sixth embodiments, and can be appropriately changed. In addition, each of the components of the diapers 1B to 1G of the above-described first to sixth embodiments can be combined as appropriate within the scope of the gist of the present invention (second invention).

For example, in the diapers 1B to 1G of the above-described first to sixth embodiments, as shown in FIG. 7 , FIG. 10 , FIG. 11 , FIG. 12 , FIG. 13 or FIG. 14 , the stretchable side sheet 3 is used on the skin side. The sheet 31 and the non-skin side sheet 32 are formed by fixing a plurality of filament-shaped elastic members 33 in a state of being elongated in the X direction. Alternatively, for example, a stretchable film, a stretchable nonwoven fabric, and stretchability may be used. a woven fabric or a laminated sheet thereof or the like.

Further, in the diapers 1B to 1G of the above-described first to sixth embodiments, as shown in FIG. 8, the fastening tape 4 is attached only to the non-skin opposing surface (the surface on the Q side) of the stretchable side panel 3, but It suffices to be attached to at least the non-skin opposing surface (surface on the Q side) of the stretchable side panel 3.

Only the parts of the above-described one embodiment can be used as appropriate in the respective inventions (the first and second inventions) or between the respective inventions.

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

<1>

A disposable diaper comprising a vertically long absorbent body comprising a liquid-retaining absorbent body, a front sheet disposed on a skin facing side of the absorbent body, and a front side sheet disposed on the absorbent body The back sheet of the non-skin facing side, and is divided into wear a ventral side portion on the ventral side of the wearer, a back side portion on the back side, and a crotch portion disposed between the ventral side portion and the back side portion, and one end side of the longitudinal direction of the absorbent body A flexible side panel extending outward in the width direction is attached to each of the two sides, and a fastening tape extending outward in the width direction is attached to the side portion of the elastic side panel in the longitudinal direction of the main body; the fastening tape is mounted The non-skin opposing surface of the stretchable side panel is spaced apart from the outer side edge of the stretchable side panel in the longitudinal direction of the main body toward the absorbent body side, and is joined by an adhesive agent. The first joining region is joined to the stretchable side panel, and the non-joining region of the fastening tape and the stretchable side panel is not joined between the joining region and the outer side edge of the stretchable side panel The first joining region is disposed further outward in the width direction, and the second weak joining region having a lower joining strength than the first joining region is continuously formed over the entire length in the longitudinal direction of the main body.

<2>

A disposable diaper according to <1>, wherein the first joining region is joined by an adhesive, and is formed by a plurality of crimping, heat sealing or ultrasonic sealing by embossing. The joint is sealed and joined.

<3>

A disposable diaper according to <1> or <2>, wherein the side panel is a stretchable side panel.

<4>

The disposable diaper according to any one of <1> to <3> wherein the above-mentioned fastening tape is attached only to the non-skin opposing surface of the side panel.

<5>

The disposable diaper according to any one of <1> to <4> wherein the second weak joint region is joined only by a plurality of sealing joints formed by embossing, heat sealing or ultrasonic sealing. .

<6>

The disposable diaper according to <5>, wherein the second weak joint region includes the plurality of seal joint portions and a non-joining portion disposed between the adjacent joint portions.

<7>

The disposable diaper according to <5> or <6>, wherein one of the plurality of sealing joint portions extends outward in the width direction across the outer side edge of the side panel along the longitudinal direction of the body.

<8>

The disposable diaper according to any one of <5> to <7> wherein, in the case of stretching the above-mentioned fastening tape at the time of wearing, the plurality of sealing joints are disposed on the outermost side in the width direction and the lowermost portion The angle of inclination of the one sealing joint on the side is substantially the same as the angle of intersection between the intersection of the side panel and the lower side of the fastening tape and the intersection of the side panel and the lower side of the absorbent body. Consistent.

<9>

The disposable diaper according to any one of <3> to <8> wherein the stretchable side sheet is attached to the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The plurality of filament-shaped elastic members are formed to be fixed in a state of being elongated in the width direction of the main body, and the joint region partially overlaps one of the fixed end portions on the outer side of the elastic member in the stretchable side panel.

<10>

The disposable diaper according to <9>, wherein the stretchable side panel is formed by disposing a plurality of elastic members having a plurality of filaments between the skin side sheet and the non-skin side sheet.

<11>

A disposable diaper according to <9> or <10>, wherein a cross section of the elastic member in the above-mentioned stretchable side panel is substantially circular, square or rectangular Banded.

<12>

The disposable diaper according to any one of <9> to <11> wherein the width or diameter of the filament-shaped elastic member disposed on the stretchable side panel is preferably 0.1 mm or more and 2 mm or less, more preferably 0.1 mm. Above and less than 1mm.

<13>

The disposable diaper according to any one of the items of the present invention, wherein the number of the elastic members disposed on the stretchable side panel is preferably one or more and 25 or less, more preferably three Above and 20 or less.

<14>

The disposable diaper according to any one of <9> to <13> wherein the elastic member of the above-mentioned filament-like elastic member has a tensile stress of 100% and an elastic modulus of 0.1 N or more and 1 N or less In the state in which the elongation is 50% or more and 300% or less in the range of elongation, it is preferably fixed in a state in which the elongation is in a range of 100% or more and 250% or less.

<15>

The disposable diaper according to any one of <3> to <8> wherein the stretchable side sheet is provided with an elastic film disposed between the two non-woven fabrics, that is, the skin side sheet and the non-skin side sheet. Or a composite comprising a network of elastomers.

<16>

A disposable diaper according to <15>, wherein the stretchable side panel to which the elastic film or the mesh containing the elastic body is disposed, the stress per 25 mm width when elongating to 100% elongation is 3 N/25 mm. The above-mentioned mesh of 25 N/25 mm or less is disposed in a state in which the elongation is in the range of 50% or more and 300% or less, and is preferably fixed in a state of being extended in a range of 100% or more and 250% or less. And formed.

<17>

The disposable diaper according to any one of <9> to <14> wherein the side panel has an adhesive layer for fixing a plurality of filament-shaped elastic members between the skin side sheet and the non-skin side sheet, The adhesive layer includes a main body side adhesive layer on the side of the end portion on the side of the absorbent body on which the elastic members are fixed, an outer side adhesive layer on the side of the outer side portion on the side of the side surface of the side surface of each of the elastic members, and An intermediate adhesive layer between the body side adhesive layer and the outer adhesive layer is fixed between the two sheets.

<18>

A disposable diaper according to <17>, wherein the intermediate adhesive layer is provided with a plurality of strips in a region between the body side adhesive layer and the outer adhesive layer, and the intermediate adhesive layer is in the diaper, and the width is smaller than the two adhesive layers. Any one of them is intermittently arranged in the width direction in the intermediate portion.

<19>

The disposable diaper according to <17> or <18>, wherein the main body side adhesive layer, the outer side adhesive layer and the intermediate adhesive layer intersect with the elastic members to extend in the longitudinal direction and extend over the longitudinal direction of the stretchable side sheets. The full length.

<20>

The disposable diaper according to any one of <3>, wherein in the side panel, in a natural state in which the elastic member is contracted, a plurality of creases are formed on both sides of the side panel, and the pleats are plural and plural The strip elastic members are formed by extending in the longitudinal direction, and the wrinkles formed on the side sheets are between the main body side adhesive layer and the front end side adhesive layer, and by the shrinkage of the elastic members, the two sheets are non-rear The region is convexly convex in a direction away from the elastic member, and on the other hand, each intermediate adhesive layer is formed in a concave shape toward the elastic member to have a concavo-convex shape.

<21>

The disposable diaper of any one of <3> to <20> wherein the length of the stretchable side panel of the joint region in which the stretchable side panel and the fastening tape overlap is longer than the length The length of the adhesive strip of the overlapping joint regions in the length direction.

<22>

The disposable diaper according to <21>, wherein the overlapping joining region is 1.2 times or more and 3.5 times or less, preferably 1.4 times or more and 3.0 times or less, in the longitudinal direction of the fastening tape.

<23>

The disposable diaper of <21> or <22>, wherein the overlapping joint area is in a range of 10% or more and 50% or less with respect to a total area of the stretchable side sheets in a plan view of the stretchable side sheet in a natural state. It is preferably in the range of 10% or more and 40% or less.

<24>

The disposable diaper according to any one of <1> to <23> wherein the shape of the sealing joint is elliptical, circular, rhombic, triangular, or polygonal.

<25>

The disposable diaper according to <24>, wherein the sealing pattern area of the sealing joint portion is 2 mm ² or more and 30 mm ² or less, preferably 2 mm ² or more and 20 mm ² or less.

<26>

The disposable diaper of <24> or <25>, wherein the sealing joints are spaced apart from each other by 1 mm or more and 8 mm or less.

<27>

The disposable diaper according to any one of <3> to <26> wherein the fastening tape provided on the outer side portion of the elastic side panel comprises a substrate sheet and a width direction of the substrate sheet The outer side has a plurality of hooking materials for engaging protrusions, and the fastening tape is folded before use, and is used for unfolding during use. The adhesive tape is in a rectangular shape which is long in the width X direction in the unfolded state, and the fastening tape is tied to the outer side. The hook material is fixed to the outer side in the width direction of the tape substrate sheet formed in the same shape as the plan view.

<28>

The disposable diaper according to any one of <1> to <27> wherein the outer surface of the abdominal side portion of the disposable diaper is provided with a fastening sheet for fixing the hook material of the fastening tape.

<29>

The disposable diaper according to any one of <1> to <28> wherein a side sheet is disposed on both side portions in the longitudinal direction of the absorbent body via a front sheet.

<30>

The disposable diaper according to <29>, wherein the side sheet is disposed and fixed over the skin facing surface side of the front sheet and the entire side portion in the longitudinal direction, and the inner side of the width direction of the side sheet The portion is a free end, and an elastic member for forming a three-dimensional gather is fixed in a state of being elongated in the longitudinal direction near the free end of the lower portion of the crotch. When worn, the contraction force of the elastic member is a specific width from the free end. Partially from the front sheet leaves to form a three-dimensional fold. Further, a side sheet and a back sheet extending toward the outside in the width direction are joined to both sides of the absorbent body in the longitudinal direction to form a burring portion, and an elastic member for forming a leg pleat in the diaper The flange portion fixed to the lower portion of the crotch is disposed in a state of being elongated in the longitudinal direction, and the leg gathers are formed by the contraction force of the elastic member when worn.

<31>

The disposable diaper according to any one of the above aspects, wherein the length of the outer side edge portion of the elastic side panel along the longitudinal direction of the main body is formed to be longer than the first fastening region of the fastening tape The length of the body in the longitudinal direction.

<32>

The disposable diaper according to any one of the above aspects, wherein the first joining region is formed by heat sealing or ultrasonic sealing.

<33>

The disposable diaper according to any one of the above aspects, wherein the first joining region includes the fastening tape and the welded portion of the stretchable side panel, and the adhesive The buckle and the non-welded portion of the above-mentioned elastic side panel are not welded.

<34>

The disposable diaper according to any one of the above aspects, wherein the first joining region has a plurality of small-shaped welded portions regularly arranged in a longitudinal direction of the body, and the welded portion is formed. A plurality of the plurality of welded portions are arranged in the main body width direction so as to be staggered so as not to be juxtaposed in the main body width direction.

<35>

The disposable diaper according to any one of the items <1> to <34> wherein the first joining region is formed by an adhesive.

<36>

The disposable diaper according to any one of the above aspects, wherein the stretchable side panel is attached to the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The material is formed by fixing a plurality of elastic members in a state of being elongated in the width direction of the main body, and the first joining region partially overlaps one of the elastic fixing members on the outer side fixed end portions of the elastic side members.

<37>

The disposable diaper according to any one of the above-mentioned items, wherein the stretchable side panel is composed of an elastic film as an elastic member and a mesh containing an elastic body between two nonwoven fabrics. The composite body in which the stretched state is fixed is formed, and the first joint region partially overlaps with one of the outer fixed end portions of the elastic member in the stretchable side panel.

<38>

The disposable diaper according to any one of the above aspects, wherein the stretchable side panel is attached to the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. a plurality of elastic members in a state of being elongated along the width direction of the body Forming or forming a composite body in which an elastic film of the elastic member and a mesh comprising an elastic body are disposed and fixed in an extended state, and the skin-side sheet and the non-skin side sheet are self-absorbent The extension of the side of the body is different.

<39>

The disposable diaper according to any one of the items <1> to <38> wherein the non-joining regions are enlarged at intervals at both end portions in the longitudinal direction of the body.

<40>

The disposable diaper according to any one of the above-mentioned items, wherein the non-joining region is spaced apart from the center line extending in the longitudinal direction of the fastening tape to be the narrowest.

<41>

The disposable diaper according to any one of the above aspects, wherein the front sheet and the outer layer composite sheet cover the entire surface of the opposite side of the absorbent body and the non-skin opposing surface. The surface extends from the periphery of the absorber, and is fixed by being welded by an adhesive such as hot melt or heat sealing.

<42>

The disposable diaper according to any one of the above aspects, wherein the side surface of the absorbent body along the longitudinal direction (Y direction) of the absorbent body is provided with a side sheet via the front sheet. .

<43>

The disposable diaper according to the above <42>, wherein the side sheet is a skin facing surface side of the front sheet, and is disposed and fixed over the entire side portion along the longitudinal direction (Y direction) of the main body, the side The inner end portion of the main sheet width direction (X direction) is a free end, and is disposed in the vicinity of the free end of the lower portion in the longitudinal direction (Y direction) of the main body. The elastic member for forming a three-dimensional pleat is fixed, and when worn, a portion having a specific width from the free end is separated from the front sheet by a contraction force of the elastic member to form a three-dimensional pleat.

<44>

The disposable diaper according to the above <42> or <43>, wherein the side sheet extending toward the outer side in the main body width direction (X direction) on the side portion of the absorbent body in the longitudinal direction (Y direction) of the main body The outer layer composite sheet is joined to the outer layer to form a flange portion.

<45>

The disposable diaper according to the above-mentioned <44>, wherein the elastic member for forming a leg gather is disposed to be fixed to the cuff portion of the crotch portion in a state of being elongated in the longitudinal direction (Y direction) of the disposable diaper. When worn, the leg gathers are formed by the contraction force of the elastic member.

<46>

The disposable diaper according to any one of the above aspects, wherein the stretchable side panel has a rectangular shape, a trapezoidal shape or a curved shape in a state of being developed into a planar shape.

<47>

The disposable diaper according to any one of the above aspects, wherein the stretchable side panel is provided with a filament-shaped elastic member, and the width of the elastic member disposed in a filament shape of the stretchable side panel or The diameter is 0.1 mm or more and 2 mm or less.

<48>

The disposable diaper of the above-mentioned <47>, wherein the stretchable side panel is provided with a filament-shaped elastic member, and the number of the elastic members disposed on the stretchable side panel is one or more and 25 or less.

<49>

The disposable diaper according to any one of the above aspects, wherein the stretchable side sheet is attached to the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The material is formed by fixing a plurality of filament-shaped elastic members in a state of being elongated in the width direction of the main body, and the elastic member is fixed to the above by a plurality of adhesives extending in the longitudinal direction (Y direction) of the elastic member The skin side sheet and the non-skin side sheet are directly joined to each other via the above-mentioned adhesive agent between the skin side sheet and the non-skin side sheet.

<50>

The disposable diaper according to the above <49>, wherein the plurality of the above-mentioned adhesives intersect with all the elastic members extending in the width direction (X direction) of the body, extend in the longitudinal direction of the body (Y direction), and extend over the stretchable side sheets. The full length of the Y direction.

<51>

The disposable diaper according to the above <49> or <50>, wherein the stretchable side sheet is combined with the fixing by the above-mentioned adhesive, and is also combined by heat-sealing welding.

<52>

The disposable diaper according to any one of the above-mentioned items, wherein the skin-side sheet of the stretchable side panel has a plurality of filament-shaped elastic members in a width direction (X direction) of the outer side The extending end portion extends to the outside in the width direction (X direction) of the main body, and the non-skin side sheet similarly has a plurality of filament-shaped elastic members in the main body width direction (X direction). An extension extending outside the body width direction (X direction).

<53>

The disposable diaper according to any one of the above-mentioned items, wherein the adhesive tape comprises a substrate sheet, and a plurality of sheets on the outer side in the body width direction (X direction) of the substrate sheet The hook of the snap protrusion, The above-mentioned fastener tape is folded before use, and is used for deployment when it is used.

<54>

The disposable diaper according to the above <24>, wherein the fastening tape has a rectangular shape which is long in the width direction (X direction) in the unfolded state, and is formed in the same shape as the plan view of the fastening tape. The hook sheet is fixed to the outer side in the main body width direction (X direction) of the base material sheet, and the outer surface of the abdominal side portion of the disposable diaper is provided with a cleat for fixing the hook material of the fastening tape. material.

<55>

The disposable diaper according to any one of the above aspects, wherein the adhesive tape is attached only to a non-skin opposing surface of the stretchable side panel.

<56>

The disposable diaper according to any one of the above aspects, wherein the inner side of the main body width direction (X direction) of the fastening tape is attached only to the non-skin side sheet constituting the stretchable side panel. The outer fixed end portion of the elastic member is further extended to the outer side in the width direction (X direction) of the main body, and is attached only to the non-skin opposing surface of the extending portion.

<57>

The disposable diaper according to the above <33>, wherein the welded portion includes a first welded portion having a longitudinal length with respect to a longitudinal direction (Y direction) of the main body, and a lengthwise direction opposite to the first welded portion. 2 welded joints.

<58>

The disposable diaper according to the above <33> or <28>, wherein the shape of the welded portion is an elliptical shape, a circular shape, a diamond shape, a triangular shape, or a polygonal shape.

<59>

The disposable diaper of the above-mentioned <33>, <57> or <58>, wherein the sealing pattern area of the welded portion is 2 mm ² or more and 30 mm ² or less.

<60>

The disposable diaper according to any one of the above-mentioned items, wherein the stretchable side panel of the stretchable side panel and the adhesive tape overlap the longitudinal length direction (Y direction) of the body, The fastening tape of the overlapping region is 1.2 times or more and 3.5 times or less the length of the body in the longitudinal direction (Y direction).

<61>

The disposable diaper according to the above <60>, wherein the overlapping area is in a range of 10% or more and 50% or less with respect to a total area of the stretchable side sheets in a plan view of the stretchable side sheet in a natural state.

<62>

The disposable diaper of the above-mentioned <60> or <61>, wherein the area of the first joining region with respect to the overlapping region is in a range of 40% or more and 90% or less.

<63>

The disposable diaper of any one of the above-mentioned <60>, wherein the area of the non-joining region with respect to the overlapping region is in a range of 10% or more and 50% or less.

<64>

The disposable diaper according to the above <33>, wherein the welded portion includes only a first welded portion having a longitudinal length with respect to a longitudinal direction (Y direction) of the main body, and the first welded portion is along the first joined portion The welded portion group extending in the longitudinal direction (Y direction) of the main body in the longitudinal direction (Y direction) is formed in two rows in the main body width direction (X direction), and the adjacent welded portions are non-welded unit.

<65>

The disposable diaper according to the above <33>, wherein the welded portion includes only a third long welded portion extending in parallel with the main body width direction (X direction), and the third welded portion is formed along the first joining portion Body length direction (Y direction) The welded portion group which is disposed intermittently and protrudes outward in the body width direction (X direction) forms two rows in the body width direction (X direction), and the first joining region is formed by two rows of the welded portion groups. The position of the center line extending in the longitudinal direction of the fastening tape is a vertex that protrudes outward in the main body width direction (X direction), and the non-joining region has a shape that is recessed outward in the main body width direction (X direction). The non-joining region is formed to gradually expand from the bottom of the center line of the fastening tape toward the center line and the space width direction (X direction), and the non-joining region is along the body length direction (Y The direction is continuously formed, and the non-joining regions are enlarged at both end portions in the longitudinal direction (Y direction) of the non-joining region.

<66>

The disposable diaper according to the above <1> or <31>, wherein the fastening tape and the stretchable side panel are fixed only by an adhesive, and the first bonding region includes bonding the fastening tape and the stretching using an adhesive. The adhesive bonding portion of the side panel, wherein the adhesive bonding portion is formed continuously in the longitudinal direction of the main body (Y direction) over the entire length direction (Y direction) of the fastening tape, and the first bonding region is formed by the above The adhesive joining portion has a shape that protrudes outward in the main body width direction (X direction) at a position where the center line of the fastening tape extending in the longitudinal direction is an apex, and the non-joining region is oriented in the main body width direction (X direction). a shape of the outer recess, wherein the non-joining region is formed in such a manner that an interval between the bottom of the center line of the fastening tape toward the center line and the space width direction (X direction) is gradually enlarged, and the non-joining region is along The longitudinal direction of the body (Y direction) is continuously formed, and the non-joining The both ends of the region in the longitudinal direction (Y direction) of the non-joining region are enlarged.

<67>

The disposable diaper according to the above <1> or <31>, wherein the fastening tape and the stretchable side panel are fixed only by an adhesive, and the first bonding region includes bonding the fastening tape and the stretching using an adhesive. The adhesive bonding portion of the side panel is formed by continuously extending the entire length direction (Y direction) of the fastening tape in the longitudinal direction (Y direction) of the main body, wherein the first bonding region is formed by The adhesive bonding portion has a shape that protrudes outward in the main body width direction (X direction) at a position above the center line extending in the longitudinal direction of the fastening tape, and the non-joining region is formed toward the main body. a shape in which the outer side is recessed in the width direction (X direction), and the non-joining region has a bottom portion at a position above the center line of the fastening tape, and has a body width direction (X direction) from the bottom toward the center line. The interval is gradually increased, the non-joining region is continuously formed along the longitudinal direction of the body (Y direction), and the interval between the non-joining regions is changed above the center line of the adhesive strip Narrow.

<68>

The disposable diaper according to any one of the above aspects, wherein the bonding strength of the second weak bonding region is 5% or more and 70% or less, more preferably 70% or less, to the bonding strength of the first bonding region. It is a joint strength of 20% or more and 50% or less.

<69>

The disposable diaper according to any one of the above aspects, wherein the area of the non-joining region overlapping the elastic side panel and the fastening tape is 10% or more and 50% or less. Good is 15% or more and 40% or less.

[Industrial availability]

According to the first aspect of the invention, there is provided a disposable diaper in which the adhesive tape and the side sheet are less likely to be broken by the base material when the diaper is worn, and the feeling of use is improved.

According to the present invention, there is provided a disposable diaper which is easy to face the skin facing surface side when the diaper is worn, and which has an outer peripheral edge portion of the stretchable side panel.

1‧‧‧Disposable diapers

2‧‧‧Absorbable ontology

2S‧‧‧ side

2S1‧‧‧ side edge

3‧‧‧ side film

3S‧‧‧ lateral side

3S1‧‧‧ lateral side edge

4‧‧‧Buckle tape

6‧‧‧ joint area

6S‧‧‧1st joint area

6W‧‧‧2nd weak joint area

24‧‧‧Side sheet

31‧‧‧ Skin side sheet

31S‧‧‧Extension

32‧‧‧Non-skin side sheet

32S‧‧‧Extension

33‧‧‧Flexible components

33I‧‧‧Inside fixed end

33O‧‧‧Outside fixed end

35‧‧‧ Body side adhesive layer

36‧‧‧Outer adhesive layer

37‧‧‧Intermediate adhesive layer

38‧‧‧ Non-continuous area

61‧‧‧Sealed joint (welding)

61G‧‧‧Sealed joint group (welding group)

62‧‧‧Unsealed joint (non-welded joint)

63‧‧‧Binder joint

611‧‧‧1st sealing joint (first welded joint)

611G‧‧‧1st sealed joint group (first welded joint group)

612‧‧‧Second sealing joint (second welded joint)

612B‧‧‧2nd sealing joint (2nd welded joint)

612C‧‧‧Second sealing joint (second welding joint)

612G‧‧‧Second sealed joint group (second welded joint group)

IL1‧‧‧1st imaginary line

IL2‧‧‧2nd imaginary line

IL3‧‧‧3rd imaginary line

PD1‧‧‧ intersection

PD2‧‧‧ intersection

PU1‧‧‧ intersection

PU2‧‧‧ intersection

X‧‧‧ direction

Y‧‧‧ direction

Claims (65)

A disposable diaper comprising a vertically long absorbent body comprising a liquid-retaining absorbent body, a front sheet disposed on a skin facing side of the absorbent body, and a front side sheet disposed on the absorbent body The back sheet of the non-skin facing side is divided into a ventral side portion on the ventral side of the wearer when worn, a back side portion on the back side, and a side portion disposed between the ventral side portion and the back side portion. a stretchable side piece extending outward in the width direction is attached to both sides of one end side in the longitudinal direction of the absorbent body, and the side part of the stretchable side piece is attached to the side of the main body in the longitudinal direction of the main body. a fastening tape extending outward in the width direction; the fastening tape is attached to the non-skin opposing surface of the elastic side panel, and the fastening tape is applied to the outer side edge of the elastic side panel along the longitudinal direction of the main body The absorbent body side is spaced apart from the stretchable side panel via the first joining region joined by the adhesive, and is not joined between the first joining region and the outer side edge of the stretchable side panel The above stick a belt having a non-joining region with the stretchable side panel or a second weak joint region disposed adjacent to the first joint region in the width direction and having a lower joint strength than the first joint region in the longitudinal direction of the main body Continuously formed, the interval between the non-joining regions is enlarged at both end portions in the longitudinal direction of the body. The disposable diaper according to claim 1, wherein the first joining region is joined by an adhesive, and is formed by a plurality of crimping, heat sealing or ultrasonic sealing by embossing The joint is sealed and joined. The disposable diaper according to claim 1 or 2, wherein the second weak joint region is joined only by a plurality of sealing joints formed by embossing, heat sealing or ultrasonic sealing. The disposable diaper according to claim 3, wherein the second weak joint region includes the plurality of seal joint portions and a non-joining portion disposed between the adjacent joint portions. The disposable diaper according to claim 3, wherein one of the plurality of sealing joint portions extends outward in the width direction across the outer side edge of the side panel in the longitudinal direction of the body. The disposable diaper according to claim 3, wherein, in the case of stretching the above-mentioned fastening tape at the time of wearing, one of the plurality of sealing joints disposed on the outermost side in the width direction and the most on the lower side of the crotch The angle of inclination is substantially the same as the angle of inclination of the intersection of the side panel and the lower side of the hook and the imaginary line connecting the side panel and the lower side of the absorbent body. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is fixed between the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The plurality of filament-shaped elastic members are formed in a state in which the direction is elongated, and the first joint region partially overlaps one of the fixed end portions on the outer side of the elastic member in the stretchable side panel. The disposable diaper according to claim 7, wherein the stretchable side panel is formed by disposing a plurality of elastic members having a plurality of filaments between the skin side sheet and the non-skin side sheet. The disposable diaper according to claim 7, wherein the elastic member of the filament-like elastic member in the stretchable side panel has a narrow band shape of a substantially circular shape, a square shape, or a rectangular shape. The disposable diaper according to claim 7, wherein the elastic member of the filament-like elastic member disposed on the stretchable side panel has a width or a diameter of 0.1 mm or more and 2 mm or less. The disposable diaper according to claim 7, wherein the number of the filament-shaped elastic members disposed on the stretchable side panel is one or more and 25 or less. The disposable diaper according to claim 7, wherein the elastic member having the elongation of the filament-like elastic member at an elongation of 100% is 0.1 N or more and 1 N or less is an elastic member having an elongation of 50% or more and The state in which the range is 300% or less is fixed. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is used for disposing an elastic film or a mesh containing an elastic body between two pieces of non-woven fabric, that is, between the skin side sheet and the non-skin side sheet. a complex of things. The disposable diaper according to claim 13, wherein the stretchable side sheet to which the elastic film or the mesh containing the elastic body is disposed is a stress of 3N per 25 mm width when elongating to an elongation of 100%. The mesh of 25 mm or more and 25 N/25 mm or less is formed by being fixed in a state in which the elongation is 50% or more and 300% or less. The disposable diaper according to claim 7, wherein the side panel has an adhesive layer for fixing a plurality of filament-shaped elastic members between the skin side sheet and the non-skin side sheet, the adhesive layer comprising the fixing elastic members. a main body side adhesive layer on the end side of the absorbent main body side, an outer side adhesive layer on the side of the outer side side of the side piece on which the elastic members are fixed, and an adhesive layer disposed on the main body side An intermediate adhesive layer between the outer sheet layers and between the two sheets is fixed. The disposable diaper according to claim 15, wherein the intermediate adhesive layer is provided with a plurality of strips in a region between the body side adhesive layer and the outer adhesive layer, and the intermediate adhesive layer is in the diaper, and the width is smaller than the two adhesive layers. Any one of them is intermittently arranged in the width direction in the intermediate portion. The disposable diaper according to claim 15, wherein the main body side adhesive layer, the outer side adhesive layer and the intermediate adhesive layer cross each elastic member and extend in the longitudinal direction and extend over the entire length of the stretchable side sheet. A disposable diaper according to claim 1 or 2, wherein in the side panel, the elastic member In the natural state of shrinkage, a plurality of creases are formed on both sides of the side panel, and each crease is formed to extend in the longitudinal direction so as to intersect with the plurality of elastic members, and the crease formed on the side panel is attached to the body side adhesive layer and the front end Between the side adhesive layers, by the contraction of the elastic member, the two sheets are convexly convex in the direction in which the non-adjacent regions are separated from the elastic members, and on the other hand, the intermediate adhesive layers are formed toward the elastic members. It is concave and thus has a concave-convex shape. The disposable diaper of claim 1 or 2, wherein the length of the stretchable side piece along the length of the body is longer than the body of the adhesive tape in the width range of the joint area where the stretchable side piece and the adhesive tape overlap The length in the length direction. The disposable diaper according to claim 19, wherein the overlapping joining region is 1.2 times or more and 3.5 times or less the length of the fastening tape in the longitudinal direction. The disposable diaper according to claim 19, wherein the overlapped joining region has a total area of the stretchable side panels of 10% or more and 50% or less with respect to the stretchable side panels in a natural state. The disposable diaper of claim 2, wherein the shape of the sealing joint is elliptical, circular, rhombic, triangular, or polygonal. The disposable diaper according to claim 22, wherein the seal joint portion has a seal pattern area of 2 mm ² or more and 30 mm ² or less. The disposable diaper according to claim 22, wherein the sealing joint portions are spaced apart from each other by 1 mm or more and 8 mm or less. The disposable diaper according to claim 1 or 2, wherein the fastening tape provided on the outer side portion of the stretchable side panel comprises a tape substrate sheet and a plurality of cards on the outer side in the width direction of the tape substrate sheet The hook material of the protrusion is folded, and the adhesive tape is folded before use, and is used for unfolding in use. The adhesive tape is in a rectangular shape elongated in the width X direction in the unfolded state, and the fastening tape is formed in the same shape as the plan view. The tape substrate is formed by fixing a hook material on the outer side in the width direction of the substrate sheet. A disposable diaper according to claim 1 or 2, wherein the outer surface of the ventral side of the disposable diaper is provided with a fastening sheet for fixing the hook material of the fastening tape. The disposable diaper according to claim 1 or 2, wherein the side sheets are disposed on both side portions in the longitudinal direction of the absorbent body via the front sheet. The disposable diaper according to claim 27, wherein the side sheet is disposed and fixed over the skin facing surface side of the front sheet and the entire side portion in the longitudinal direction, and the inner side of the width direction of the side sheet The portion is a free end, and an elastic member for forming a three-dimensional gather is fixed in a state of being elongated in the longitudinal direction near the free end of the lower portion of the crotch. When worn, the contraction force of the elastic member is a specific width from the free end. a part of the front sheet is separated from the front sheet to form a three-dimensional pleat; and a side sheet and a back sheet extending outward in the width direction are joined to both sides of the absorbent body in the longitudinal direction to form a burring portion. In the diaper, the elastic member for forming a leg gather is disposed in a flange portion that is fixed to the lower portion of the crotch in a state of being elongated in the longitudinal direction, and the leg gathers are formed by the contraction force of the elastic member when worn. The disposable diaper according to claim 1 or 2, wherein the length of the outer side edge portion of the stretchable side panel in the longitudinal direction of the main body is formed to be longer than the length of the first fastening region of the fastening tape in the longitudinal direction of the main body. A disposable diaper according to claim 1 or 2, wherein said first joining region is formed by heat sealing or ultrasonic sealing. The disposable diaper according to claim 1 or 2, wherein the first joining region includes a welded portion to which the fastening tape and the stretchable side sheet are welded, and a non-welding of the unbonded fastening tape and the stretchable side sheet unit. The disposable diaper according to claim 1 or 2, wherein the first joining region has a plurality of small-shaped welded portions regularly arranged in a longitudinal direction of the body, and the welded portions are arranged in a plurality of rows in the width direction of the body. The adjacent welded portions are arranged in a staggered manner so as not to be juxtaposed in the body width direction. The disposable diaper according to claim 1 or 2, wherein the first joining region is formed by an adhesive. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is fixed between the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The plurality of elastic members are formed in a state in which the direction is elongated, and the first joining region partially overlaps one of the elastic fixing members on the outer side fixed end portions of the elastic side members. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is a composite film in which an elastic film as an elastic member and a mesh containing an elastic body are overlapped between two nonwoven fabrics and are fixed in an extended state. In the body formation, the first joining region partially overlaps one of the elastic fixing member outer side fixing end portions of the elastic side panel. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is fixed between the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. Formed by a plurality of elastic members in a state in which the direction is elongated, or formed by a composite body in which an elastic film of the elastic member and a mesh including an elastic body are disposed and fixed in an extended state, the skin side sheet and the above The length of the non-skin side sheet from the side of the absorbent body is different. The disposable diaper according to claim 1 or 2, wherein the interval of the non-joining region becomes the narrowest above the center line extending in the longitudinal direction of the fastening tape. The disposable diaper of claim 1 or 2, wherein the front sheet and the outer layer composite sheet respectively cover the entire surface of the skin opposite surface of the absorbent body and the non-skin opposing surface, and the absorbent body The peripheral edge is extended and fixed in a portion to be stretched by an adhesive such as hot melt or heat sealing. The disposable diaper according to claim 1 or 2, wherein a side sheet is disposed on a side portion of the absorbent body along a longitudinal direction (Y direction) of the main body via the front sheet. The disposable diaper according to claim 39, wherein the side sheet is the skin facing side of the front sheet, and is disposed and fixed over the entire side of the side in the longitudinal direction (Y direction) of the body, the side portion The inner end portion of the sheet in the main body width direction (X direction) is a free end, and an elastic member for forming a three-dimensional gather is fixed in a state of being elongated in the longitudinal direction (Y direction) in the vicinity of the free end of the crotch. When worn, the portion of the specific width from the free end is separated from the front sheet by the contraction force of the elastic member to form a three-dimensional gather. The disposable diaper according to claim 39, wherein the side sheet and the outer layer composite sheet which extend to the outer side in the body width direction (X direction) on the side of the absorbent body in the longitudinal direction (Y direction) of the body Engaged to form a flange portion. The disposable diaper according to claim 41, wherein in the disposable diaper, the elastic member for forming a leg gather is disposed to be fixed to the cuff portion of the crotch portion in a state of being elongated in the longitudinal direction of the body (Y direction), and is worn. At the time, the leg gathers are formed by the contraction force of the elastic member. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel has a rectangular shape, a trapezoidal shape or a curved shape in a state of being developed into a planar shape. The disposable diaper according to claim 1 or 2, wherein a filament-shaped elastic member is disposed on the stretchable side panel, and a width or diameter of the elastic member disposed in a filament shape of the stretchable side panel is 0.1 mm or more and 2 mm the following. The disposable diaper of claim 44, wherein the stretchable side panel is provided with a filament-shaped elastic member, The number of the elastic members disposed on the stretchable side panel is one or more and 25 or less. The disposable diaper according to claim 1 or 2, wherein the stretchable side panel is fixed between the skin side sheet on the opposite side of the skin and the non-skin side sheet on the non-skin facing side. The elastic member is formed by a plurality of filament-shaped elastic members in a state in which the direction is elongated, and the elastic member is fixed to the skin-side sheet and the non-ferrous material via a plurality of adhesives extending in the longitudinal direction (Y direction) of the elastic member. The skin side sheet and the non-skin side sheet are directly joined to each other via the above-mentioned adhesive agent between the skin side sheets and the portion where the elastic member is not placed. The disposable diaper of claim 46, wherein the plurality of the above-mentioned adhesives intersect with all of the elastic members extending in the width direction (X direction) of the body, extending in the longitudinal direction of the body (Y direction) and extending over the Y of the stretchable side panels The full length of the direction. The disposable diaper according to claim 46, wherein the stretchable side panel is combined with the fixing by the above-mentioned adhesive, and is also combined by heat-sealing welding. The disposable diaper according to claim 1 or 2, wherein the skin side sheet of the stretchable side panel has a body width direction (X direction) of the plurality of filament-shaped elastic members, and the side fixed end portion is oriented in the body width direction (X) In the same manner, the non-skin side sheet has a plurality of filament-shaped elastic members in the body width direction (X direction), and the side fixed end portion extends outward in the body width direction (X direction). Extension. The disposable diaper according to claim 1 or 2, wherein the adhesive tape comprises a substrate sheet, and a hook material having a plurality of engaging protrusions on the outer side in the main body width direction (X direction) of the substrate sheet. The above-mentioned fastener tape is folded before use, and is used for deployment when it is used. The disposable diaper of claim 22, wherein the above-mentioned fastener tape is in an unfolded state a rectangular shape in which the main body width direction (X direction) is long, and is formed by fixing a hook material on the outer side in the main body width direction (X direction) of the base material sheet formed in the same manner as the plan view shape of the fastening tape. The outer surface of the abdominal side portion of the disposable diaper is provided with a fastening sheet for fixing the above-mentioned hook material of the above-mentioned fastening tape. The disposable diaper according to claim 1 or 2, wherein the inner side of the main body width direction (X direction) of the fastening tape is attached only to the outer side fixed end of the elastic member in the non-skin side sheet constituting the stretchable side panel The portion is further extended on the outer side in the width direction (X direction) of the body, and is attached only to the non-skin contrast surface of the extension portion. The disposable diaper according to claim 31, wherein the welded portion includes a first welded portion having a longitudinal length with respect to a longitudinal direction (Y direction) of the main body, and a second long portion that is oriented longitudinally opposite to the first welded portion. Welding joint. The disposable diaper of claim 31, wherein the shape of the welded portion is an elliptical shape, a circular shape, a diamond shape, a triangular shape, and a polygonal shape. The disposable diaper according to claim 31, wherein the sealing pattern area of the welded portion is 2 mm ² or more and 30 mm ² or less. The disposable diaper according to claim 1 or 2, wherein the length of the stretchable side panel along the longitudinal direction of the body (Y direction) is within a width of a region in which the stretchable side panel overlaps the fastener tape The length of the adhesive tape of the region is 1.2 times or more and 3.5 times or less along the length direction (Y direction) of the body. The disposable diaper according to claim 56, wherein the overlapping area is in a range of 10% or more and 50% or less with respect to a total area of the stretchable side sheets in a plan view of the stretchable side sheets in a natural state. The disposable diaper according to claim 56, wherein an area of the first joining region with respect to the overlapping region is in a range of 40% or more and 90% or less. A disposable diaper according to claim 56, wherein said non-joining area is relatively heavy with respect to said weight The area of the stacked region is in the range of 10% or more and 50% or less. The disposable diaper according to claim 31, wherein the welded portion includes only a first welded portion having a longitudinal length with respect to a longitudinal direction (Y direction) of the main body, and the first welded portion is along the body at the first joined portion The welded portion group extending in the longitudinal direction (Y direction) formed in the longitudinal direction (Y direction) is formed in two rows in the main body width direction (X direction), and the adjacent welded portions are non-welded portions . The disposable diaper according to claim 31, wherein the welded portion includes only a third long welded portion extending in parallel with the main body width direction (X direction), and the third welded portion is formed along the main body in the first joining portion The welding portion group which is disposed intermittently in the longitudinal direction (Y direction) and which is formed to protrude outward in the main body width direction (X direction) forms two rows in the main body width direction (X direction), and the first joining region is formed by two rows The welding portion group has a shape that protrudes outward in the main body width direction (X direction) at a position where the center line of the fastening tape extending in the longitudinal direction is an apex, and the non-joining region is oriented in the main body width direction (X a direction in which the non-joining region is formed such that the non-joining region is gradually enlarged from the bottom of the center line of the fastening tape toward the center line and the space width direction (X direction) is gradually enlarged. The longitudinal direction (Y direction) of the main body is continuously formed, and the non-joining area is enlarged at both ends of the main body longitudinal direction (Y direction) of the non-joining area. The disposable diaper according to claim 1, wherein the fastening tape and the elastic side panel are fixed only by an adhesive, and the first bonding region includes bonding the fastening tape and the stretching using an adhesive. The adhesive bonding portion of the side panel, wherein the adhesive bonding portion is formed continuously in the longitudinal direction of the main body (Y direction) over the entire length direction (Y direction) of the fastening tape, and the first bonding region is formed by the above The adhesive joining portion has a shape that protrudes outward in the main body width direction (X direction) at a position where the center line of the fastening tape extending in the longitudinal direction is an apex, and the non-joining region is oriented in the main body width direction (X direction). a shape of the outer recess, wherein the non-joining region is formed in such a manner that an interval between the bottom of the center line of the fastening tape toward the center line and the space width direction (X direction) is gradually enlarged, and the non-joining region is along The main body longitudinal direction (Y direction) is continuously formed, and the non-joining area is enlarged at both end portions in the longitudinal direction (Y direction) of the non-joining area. The disposable diaper according to claim 1, wherein the fastening tape and the stretchable side panel are fixed only by an adhesive, and the first bonding region includes bonding the adhesive tape and the stretchable side panel with an adhesive. In the agent bonding portion, the adhesive bonding portion is formed continuously in the longitudinal direction of the main body (Y direction) over the entire length direction (Y direction) of the fastening tape, and the first bonding region is bonded by the adhesive bonding portion a shape that protrudes outward in the main body width direction (X direction) at a position above the center line extending in the longitudinal direction of the fastening tape, and the non-joining region is oriented in the body width direction (X direction) a shape of the outer recess, wherein the non-joining region has a position above the center line of the fastening tape The bottom portion is formed to gradually expand from the bottom toward the center line in the direction of the body width direction (X direction), and the non-joining region is continuously formed along the longitudinal direction of the body (Y direction), and the non-joining region The gap is narrower at the top of the center line of the more adhesive strip. The disposable diaper according to claim 1 or 2, wherein the joint strength of the second weak joint region is a joint strength of 5% or more and 70% or less with respect to the joint strength of the first joint region. The disposable diaper according to claim 1 or 2, wherein an area of the non-joining region with respect to a region where the stretchable side panel overlaps with the fastening tape is 10% or more and 50% or less.