WO2014069142A1 - Disposable diaper - Google Patents

Abstract

This disposable diaper (1) has a side panel (3) which extends outward in the X direction attached to each of both sides (2S) of one end side of an absorbent body (2) in the Y direction which comprises an absorbent (23) with liquid retention properties, and a fastening tape (4) which extends outward in the X direction attached to an exterior side (3S) that extends along the Y direction of the side panel (3). The fastening tape (4) is bonded to one side of the side panel (3) via a bonding region (6). The bonding region (6) comprises a first bonding region (6S) which is bonded by an adhesive and a non-bonded region (7) or a second weak bonding region (6W) which is disposed adjacent to the first bonding region (6S) on the exterior side in the X direction and has a bonding strength that is weaker than that of the first bonding region (6S).

Description

Disposable diapers

The present invention relates to a deployable disposable diaper.

Conventionally, disposable diapers having side panels extending from both side edges of the absorbent main body are known. As a disposable diaper having a side panel (stretchable side panel), the applicant previously provided a non-stretchable portion on the outer side portion along the longitudinal direction of the main body of the stretchable side panel, and the nonstretchable portion is stretchable. The disposable diaper which the elastic member which comprises a side panel, and the panel material which comprises a side panel (expandable side panel) are not joined was proposed (refer to patent documents 1). According to the diaper described in Patent Document 1, since the elastic member and the panel material are not joined in the non-stretchable portion, the flexibility of the outer side portion of the stretchable side panel is improved, and the elasticity The fixing stability of the member is also improved.

In addition, as a disposable diaper having a side panel (stretchable side panel), the applicant of the present invention first has a first fixing portion to which a hook tape constituting a fastening tape and a sheet base material constituting the fastening tape are fixed. The second fixing portion to which the fastening tape and the stretchable waist panel are fixed is formed to be separated in the main body width direction, and the lower end edge of the second fixing portion in the main body longitudinal direction is the first fixing portion. A disposable diaper positioned above the lower end edge in the main body longitudinal direction and spaced from the lower end edge in the main body longitudinal direction of the sheet base material constituting the fastening tape has been proposed (see Patent Document 2). According to the diaper described in Patent Document 2, the hook tape constituting the fastening tape is unlikely to be peeled off from the sheet base material constituting the fastening tape due to the arrangement relationship between the first fixing portion and the second fixing portion. Will improve.

JP 2012-135446 A JP 2012-120663 A

However, in the diaper described in Patent Document 1, the tape base material constituting the fastening tape is fixed to the panel material constituting the stretchable side panel via a joining region having a uniform adhesive strength. As described above, when the diaper is fixed, if the fastening tape is pulled by hand when the diaper is worn and excessive tensile strength is applied to the joining region, the base material is destroyed. It may occur and it is difficult to maintain the wearing state of the diaper. This base material breakage tends to occur at the side edge portion of the joining region on the fastening tape side, and particularly easily at both ends of the side edge portion of the joining region on the fastening tape side. Thus, the diaper described in Patent Document 1 has room for improvement from the viewpoint of improving the feeling of use for maintaining the wearing state of the diaper. Moreover, also in the diaper described in Patent Document 2, since the fastening tape and the stretchable waist panel are fixed via the second fixing portion having a uniform adhesive strength, similarly to the diaper described in Patent Document 1. The base material may be destroyed, and there is room for improvement from the viewpoint of improving the feeling of use.

Therefore, it is an object of the present invention to provide a disposable diaper in which the fastening tape and the side panel are not easily broken when the diaper is worn, and the feeling of use is improved.

Moreover, in the diaper described in Patent Document 1, the tape base material constituting the fastening tape is fixed with a predetermined width from the outer side edge of the panel material constituting the stretchable waist panel. Thus, if the tape base material is fixed in line with the outer side edge of the panel material, when wearing the diaper, pulling the fastening tape by hand and extending the elastic waist panel The outer peripheral edge of the waist panel may be bent toward the non-skin facing surface. When the fastening part of the fastening tape located on the back side of the wearer is pressed against the landing sheet located on the abdomen side of the wearer while it is folded to the non-skin facing side, It is easy to get caught when wearing, and there is room for improvement from the viewpoint of improving the feeling of use. Also in the diaper described in Patent Document 2, the second fixing portion that fixes the fastening tape and the stretchable waist panel is formed so as to coincide with the outer side edge of the stretchable waist panel. Similar to the diaper described, the outer peripheral edge of the stretchable waist panel may be bent toward the non-skin facing surface, 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 in which the outer peripheral edge portion of the stretchable waist panel is easy to face toward the skin facing surface side when wearing a diaper, and the feeling of use is improved.

The present invention has a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body. A vertically long absorbent main body divided into a ventral part located on the ventral side, a dorsal part located on the dorsal side, and a crotch portion arranged between the ventral part and the dorsal part, Stretchable side panels that extend outward in the width direction are attached to both side portions on one end side in the longitudinal direction of the stretchable main body, and the widthwise outer side of the stretchable side panel extends outwardly along the lengthwise direction of the body. The present invention relates to a disposable diaper to which a fastening tape extending in the direction is attached. The fastening tape is attached to the non-skin facing surface of the stretchable side panel. The fastening tape is spaced apart from an outer side edge along the longitudinal direction of the main body of the stretchable side panel to the absorbent main body side, via a first joining region joined to the stretchable side panel by an adhesive. Are joined. Between the joint region and the outer side edge of the stretchable side panel, the fastening tape and the stretchable side panel are not joined to each other in the width direction or outside the first joint region. A second weakly bonded region having a bonding strength weaker than that of the first bonded region disposed adjacent to the side is continuously formed over the entire length in the longitudinal direction of the main body.

FIG. 1: is the top view which looked at the state which expanded the deployment type disposable diaper which is this embodiment of this invention (1st invention) from the surface sheet side. FIG. 2 is an enlarged plan view of a state where the stretchable side panel of the unfolded disposable diaper of FIG. 1 is expanded and extended. FIG. 3 is a cross-sectional view of the cross section taken along the line II of FIG. 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 of a state in which the stretchable side panel of the deployable disposable diaper according to the second embodiment of the present invention (first invention) is expanded and extended (corresponding to FIG. 2).

FIG. 6: is the top view which looked at the state which expand | deployed the expandable disposable diaper which is 1st Embodiment of this invention (2nd invention) from the surface sheet side. FIG. 7 is an enlarged plan view of the stretchable waist panel of the unfolded disposable diaper of FIG. 8 is a cross-sectional view taken along the line II of FIG. FIG. 9 is an enlarged plan view showing a state of the stretchable waist panel when the unfolded disposable diaper of FIG. 6 is worn. FIG. 10 is an enlarged plan view of the stretchable waist panel of the unfolded disposable diaper according to the second embodiment of the present invention (second invention) (corresponding to FIG. 7). FIG. 11 is an enlarged plan view of a stretchable waist panel having a deployable disposable diaper according to a third embodiment of the present invention (second invention) (corresponding to FIG. 7). FIG. 12 is an enlarged plan view of a stretchable waist panel having a deployable disposable diaper according to a fourth embodiment of the present invention (second invention) (corresponding to FIG. 7). FIG. 13 is an enlarged plan view of a stretchable waist panel having a deployable disposable diaper according to a fifth embodiment of the present invention (second invention) (corresponding to FIG. 7). FIG. 14 is an enlarged plan view of a stretchable waist panel having a deployable disposable diaper according to a sixth embodiment of the present invention (second invention) (corresponding to FIG. 7).

Detailed Description of the Invention

Hereinafter, the disposable diaper of the present invention (first invention) will be described based on its preferred embodiment with reference to FIGS.
As shown in FIG. 1, the disposable diaper 1 of the present embodiment (hereinafter also referred to as “diaper 1”) is a liquid-retaining absorbent body 23, and a topsheet 21 disposed on the skin facing surface side of the absorbent body 23. And the back surface sheet 22 distribute | arranged to the non-skin opposing surface side of the absorber 23, the abdominal part A located in a wearer's abdominal side at the time of wear, the back part B and the abdominal part A located in a back | dorsal side A longitudinally long absorbent main body 2 which is divided into a crotch portion C arranged between the back side portion B and the main body longitudinal direction (Y direction) is provided. As shown in FIG. 1, the diaper 1 is outward in the width direction (X direction) on one end side in the longitudinal direction (Y direction) of the absorbent body 2, specifically, on both side portions 2 </ b> S of the back side portion B. A side panel 3 extending to the side is attached, and a fastening tape 4 extending outward in the width direction (X direction) is attached to the outer side portion 3S along the longitudinal direction (Y direction) of the main body of the side panel 3 Yes.
As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.

Moreover, in this specification, a "skin opposing surface" is a surface distribute | arranged to a wearer's skin side at the time of wear among the front and back both surfaces of each member which comprises the diaper 1, and "P" side in FIG. It is the same surface as. In addition, the “non-skin facing surface” is a surface of the front and back surfaces of each member constituting the diaper 1 that is directed to the side opposite to the wearer's skin side when worn, on the “Q” side in FIG. It is the same surface as the surface.
Further, the “Y” direction shown in each figure is the longitudinal direction (main body longitudinal direction) of the absorbent main body 2 of the diaper 1 and is a direction parallel to the center line CL. The “X” direction shown in each figure Is the width direction (main body width direction) of the absorbent main body 2 of the diaper 1 and is the direction perpendicular to the center line CL. Hereinafter, the diaper 1 will be specifically described.

As shown in FIG. 1, the absorbent main body 2 has a rectangular shape that is long in the Y direction, and has a liquid-permeable surface sheet 21 and liquid-impermeable or liquid-impermeable (including water repellency). A back sheet 22 and a liquid retaining absorbent 23 interposed between the two sheets 21 and 22 are provided. As shown in FIG. 1, each of the top sheet 21 and the back sheet 22 covers the entire skin facing surface and the non-skin facing surface of the absorber 23, extends from the periphery of the absorber 23, In the protruding part, it is fixed by adhesive such as hot melt or by fusion such as heat sealing. The top sheet 21 is the same as the length of the back sheet 22 in the Y direction, but is shorter than the back sheet 22 in the X direction. The back sheet 22 is formed in the same shape as the absorbent main body 2 in plan view.

Further, a side sheet 24 is arranged on each side part 2S along the Y direction of the absorbent main body 2 via a surface sheet 21. The side sheet 24 is disposed on and fixed to the skin facing surface side of the top sheet 21 over the entire side portion 2S along the Y direction. The inner end (near the center line CL) in the X direction of the side seat 24 is a free end, and an elastic member 25 for forming a three-dimensional gather is extended in the Y direction near the free end of the crotch C. It is disposed and fixed, and when worn, due to the contraction force of the elastic member 25, a portion having a predetermined width from the free end is separated from the topsheet 21 to form a three-dimensional gather.

Further, a side sheet 24 and a back sheet 22 extending outward in the X direction are joined to each side part 2S along the Y direction of the absorbent main body 2 to form a flap part. As shown in FIG. 1, an elastic member 26 for forming leg gathers is disposed and fixed in the Y direction in the diaper 1 so as to be stretched in the Y direction, and the elastic member 26 contracts when worn. Leg gathers are formed by the force.

As described above, the side panels 3 extending outward in the width direction (X direction) are attached to both side portions 2S of the back side portion B of the absorbent main body 2, as shown in FIG. A fastening tape 4 extending outward in the width direction (X direction) is attached to the outer side portion 3S of the panel 3. In the diaper 1, as shown in FIG. 3, the side panel 3 is placed in the X direction from the side edge 2 </ b> S <b> 1 of the absorbent main body 2 on the non-skin facing surface of the back sheet 22 disposed on the side portion 2 </ b> S by various known methods. It is fixed so as to extend outward. In the diaper 1, the side panel 3 is fixed to the non-skin facing surface of the back sheet 22, but is disposed and fixed between the side sheet 24 and the back sheet 22 disposed on the side 2 </ b> S. Moreover, it may be fixed to the skin facing surface of the side sheet 24. Moreover, in the diaper 1, the side panel 3 is a stretchable side panel having stretchability in the X direction.

In the diaper 1, the stretchable side panel 3 includes a skin-side sheet 31 positioned on the skin facing surface side and a non-skin-side sheet 32 positioned on the non-skin facing surface side, as shown in FIGS. 2 and 3. A plurality of thread-like elastic members 33 extending in the X direction are fixed therebetween. Moreover, the length of the outer side part 3s along the Y direction of the stretchable side panel 3 is formed longer than the length of the Y direction in the joining area | region 6 of the fastening tape 4 mentioned later. More specifically, as shown in FIG. 2, the stretchable side panel 3 in the diaper 1 is formed in a rectangular shape in a state where the stretchable side panel 3 is flattened, and forms the stretchable side panel 3. 31 and the non-skin side sheet | seat 32 are also formed in the stretched side panel 3 and the planar view shape equally in the state expanded to planar shape. Each of the plurality of elastic members 33 is arranged substantially in parallel along the X direction of the diaper 1 and extends in the X direction. In the diaper 1, the plurality of elastic members 33 in the stretchable side panel 3 are arranged at substantially equal intervals in the Y direction. In the diaper 1, the stretchable side panel 3 is formed in a rectangular shape, but the length of the outer side edge along the Y direction of the stretchable side panel 3 is the joining region 6 of the fastening tape 4. If it is formed longer than the length in the Y direction, a shape including a trapezoid or a curve may be used.

As described above, the side panel 3 of the diaper 1 is a stretchable side panel, but may be a side panel that does not have stretchability. The stretchable side panel 3 of the diaper 1 is formed by arranging and fixing a plurality of thread-like elastic members 33 between two nonwoven fabrics (skin-side sheet 31 and non-skin-side sheet 32). However, the elastic side panel 3 is provided with an elastomer film or a net made of an elastomer instead of the thread-like elastic member 33 between two nonwoven fabrics (skin-side sheet 31 and non-skin-side sheet 32). A fixed complex can also be used. In the case where the thread-like elastic member 33 is used, the cross-section includes a substantially circular or square shape and a narrow band shape such as a rectangular shape.

Moreover, in the elastic side panel 3 of the diaper 1, as shown in FIG.2 and FIG.3, the skin side sheet | seat 31 and the non-skin side sheet | seat 32 which comprise the elastic side panel 3 are the same, and are the same Although it is formed in a size, the skin side sheet 31 and the non-skin side sheet 32 may have such sizes that the extension lengths from the side edge 2S1 of the absorbent main body 2 are different. As described above, when the stretchable side panel 3 is formed using the skin side sheet 31 and the non-skin side sheet 32 having different lengths extending from the side edge 2S1 in the X direction, The X direction outer side of the outer side portion 3 </ b> S is formed by one sheet 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.

The thread-like elastic member 33 disposed on the stretchable side panel 3 has a width (dimension in the Y direction) and a diameter of 0.1 mm from the viewpoint of improving the flexibility of the stretchable side panel 3 and ensuring stretchability. The thickness is preferably 2 mm or less and more preferably 0.1 mm or more and 1 mm or less. Further, the number of the thread-like elastic members 33 arranged on the stretchable side panel 3 is preferably about 1 to 25, more preferably 3 to 20. Further, the elongation rate can be appropriately selected from conventionally known one, and a single elastic elastic member 33 having a stress of 0.1 N or more and 1 N or less when stretched to an elongation rate of 100% has an elongation rate of 50% or more and 300% or less. It is preferably disposed and fixed in a stretched state in a range of 100%, more preferably in a state of being stretched and fixed in a range of 100% to 250%. The elongation rate is the ratio of the length of the stretched portion to the natural length. For example, when a 10 cm length is stretched to 20 cm, the stretch rate is 100%.

In addition, when the elastic side panel 3 is formed by arranging and fixing an elastomer film or an elastomer net instead of the thread-like elastic member 33, the stress per 25 mm width when stretched to 100% stretch rate. It is preferable to form and fix a net of 3N / 25mm or more and 25N / 25mm in a stretched state in the range of 50% or more and 300% or less, and extend it in the range of 100% or more and 250% or less. More preferably, it is formed by being fixed in a state where it is in contact. Further, when the stretchable side panel 3 is formed using an elastomer film or a net made of an elastomer instead of the thread-like elastic member 33, the skin side sheet 31 and the non-skin are formed with the elastomer film or the net in an unstretched state. The case where the side panel is formed by being disposed and fixed between the side sheets 32 is also included. In that case, in order to give the extensibility to the width direction to the skin side sheet | seat 31 and the non-skin side sheet | seat 32 in a post process, an extending | stretching process is given to the width direction and the stretchable side panel 3 is formed. The degree of stretching may be in the range where the elastomer film or net used does not break, but is preferably in the range of 50% to 300%.

As shown in FIG. 3, the side panel 3 in the diaper 1 has an adhesive layer that fixes a plurality of thread-like elastic members 33 between the skin-side sheet 31 and the non-skin-side sheet 32. The agent layer fixes the body side adhesive layer 35 that fixes the end side of each elastic member 33 on the absorbent body 2 side, and fixes the end side of the side panel 3 of each elastic member 33 on the side 3S side. And an intermediate adhesive layer 37 disposed between the main body side adhesive layer 35 and the outer side adhesive layer 36 to fix the two sheets 31 and 32. ing. A plurality of intermediate adhesive layers 37 are provided in a region between the main body side adhesive layer 35 and the outer side adhesive layer 36. In the diaper 1, the intermediate adhesive layer 37 has a smaller width than both the adhesive layers 35 and 36 and is intermittently disposed in the intermediate region 30 in the X direction. As shown in FIG. 2, the main body side adhesive layer 35, the outer side adhesive layer 36, and the intermediate adhesive layer 37 intersect with each elastic member 33 and extend in the Y direction, and the stretchable side panel 3. Over the entire length in the Y direction. Therefore, the plurality of elongated elastic members 33 in the stretched state are interposed between the skin side sheet 31 and the non-skin side sheet 32 via the main body side adhesive layer 35, the outer side adhesive layer 36 and the intermediate adhesive layer 37. It is fixed to. The stretchable side panel 3 has a main body side adhesive layer 35, an outer side adhesive layer 36, and an intermediate adhesive layer applied to one or both of the skin side sheet 31 and the non-skin side sheet 32 by various known methods. The adhesive which becomes 37 is applied, and after coating, the sheets 31 and 32 are overlapped and pressed to fix a plurality of elongated elastic members 33 in a stretched state.

As shown in FIG. 3, the stretchable side panel 3 includes a body-side adhesive layer 35, an outer-side adhesive, and the skin-side sheet 31 and the non-skin-side sheet 32, in a region where the elastic member 33 is not interposed. Direct bonding is performed via the agent layer 36 and the intermediate adhesive layer 37. Therefore, between the main body side adhesive layer 35 and the adjacent intermediate adhesive layer 37, between the adjacent intermediate adhesive layers 37, and between the outer side adhesive layer 36 and the adjacent intermediate adhesive layer 37. A non-adhesion region 38 where the skin-side sheet 31 and the non-skin-side sheet 32 are not bonded to each other is formed therebetween. Similarly to the adhesive layers 35, 36, and 37, the non-adhesion region 38 also intersects all of the plurality of elastic members 33 and extends in the Y direction over the entire length of the side panel 3 in the Y direction. It extends to.

In the side panel 3 of the diaper 1 formed as described above, the elastic member 33 is fixed in a stretched state by the main body side adhesive layer 35, the distal end side adhesive layer 36 and the intermediate adhesive layer 37, In the natural state in which the elastic member 33 contracts, a plurality of wrinkles are formed on both sides of the side panel 3 as shown in FIG. Each ridge is formed to extend in the Y direction so as to intersect the plurality of elastic members 33. As shown in FIG. 3, the wrinkle formed on the side panel 3 has two sheets 31 and 32 formed between the main body side adhesive layer 35 and the front end side adhesive layer 36 by contraction of the elastic member 33. In each non-adhesion region 38, the convex shape bulges away from the elastic member 33, while each intermediate adhesive layer 37 is formed in a concave shape toward the elastic member 33. have. Such a bag does not disappear completely even when the diaper is worn.

Each elastic member 33 in the stretchable side panel 3 formed in this way is inward in the X direction (close to the center line CL) fixed by the main body side adhesive layer 35, as shown in FIGS. It has an outer fixed end 33 </ b> O fixed by the fixed end 33 </ b> I and the outer adhesive layer 36.
The length in the X direction of the outer fixed end portion 33O is in the range of 3% to 20% of the total length in the X direction of the thread-like elastic member 33 in the natural state of the stretchable side panel 3 shown in FIG. It is preferably 5% or more and 15% or less. The length of the inner fixed end 33I in the X direction is the same as the length of the outer fixed end 33O in the X direction. The stretchable side panel 3 may be applied in combination with fixing by heat sealing or the like in addition to fixing by the adhesive layers 35, 36, and 37.

In the diaper 1, the skin-side sheet 31 of the stretchable side panel 3 is, as shown in FIGS. 2 and 3, more in the X direction than the outer fixed end 33 </ b> O in the X direction of the plurality of thread-like elastic members 33. Similarly, the non-skin-side sheet 32 also extends outward in the X direction from the outer fixed end portion 33O in the X direction of the plurality of elastic members 33. It has an extending part 32S. The extending portions 31S and 32S are joined together via a plurality of seal joining portions 61, which will be described later, formed by crimping by embossing, heat sealing, or ultrasonic sealing. The extension portions 31S and 32S may be fixed to each other by using an adhesive instead of the above-described seal joint portion 61. From the viewpoint that the outer side portion 3S of the stretchable side panel 3 is difficult to bend during use. May be combined.

The fastening tape 4 is bonded to one side of the side panel 3 via a bonding region 6. In the diaper 1, as shown in FIG. 3, the non-skin facing surface (Q side surface) of the stretchable side panel 3. ) Is attached only. Specifically, in the diaper 1, as shown in FIG. 3, the inner side (close to the center line CL) of the fastening tape 4 in the X direction is in the non-skin side sheet 32 constituting the stretchable side panel 3. The thread-like elastic member 33 is attached only to the extending portion 32S outward in the X direction from the outer fixed end portion 33O, and is attached to the non-skin facing surface (Q-side surface) of the extending portion 32S. As shown in FIG. 2, the fastening tape 4 is attached to the diaper 1 so as to be close to the end of the stretchable side panel 3 on the back side B side in the Y direction. In the diaper 1, the fastening tape 4 is attached only to the non-skin facing surface of the side panel 3, but may be attached only to the skin facing surface of the side panel 3.

The fastening tape 4 provided on the outer side portion 3S of the stretchable side panel 3 will be described in detail. There are a plurality of fastening tapes 4 on the outer side of the tape base sheet 41 and the tape base sheet 41 in the X direction. A hook member 42 having a plurality of engaging projections. The fastening tape 4 is folded before use, and is unfolded and used as shown in FIG. 3 at the time of use. As shown in FIG. 2, the fastening tape 4 of the diaper 1 has a rectangular shape that is long in the X direction in the unfolded state. The fastening tape 4 is formed by fixing a hook material 42 on the outer side in the X direction of the tape base sheet 41 formed to be equal to the shape of the fastening tape 4 in plan view. In addition, the landing sheet 5 which fixes the hook material 42 of the fastening tape 4 is provided in the outer surface of the stomach side part A of the diaper 1, as shown in FIG.

As shown in FIG. 2, the joining region 6 for joining the fastening tape 4 and the side panel 3 is outside the first joining region 6S joined by an adhesive and the first joining region 6S in the width direction (X direction). It consists of the 2nd weak junction area | region 6W whose joining strength is weaker than the joining strength of the 1st joining area | region 6S distribute | arranged adjacent to the side. The joining region 6 is formed over the entire region where the fastening tape 4 and the side panel 3 overlap. The junction region 6 includes a first junction region 6S and a second weak junction region 6W that are adjacent to each other. The first joining region 6S and the second weak joining region 6W are formed across both ends of the fastening tape 4 overlapping the side panel 3 in the Y direction. A second weakly bonded region 6W adjacent to the first bonded region 6S is formed between the first bonded region 6S and the outer side edge 3S1 of the stretchable side panel 3, as shown in FIG. Here, for example, when the fastening tape 4 is pulled in the X direction, the first joining region 6S is firmly fixed to such an extent that the joining portion between the fastening tape 4 and the side panel 3 causes the base material to break. Has bonding strength. Further, the second weakly bonded region 6W has a bonding strength that is weaker than the bonding strength of the first bonded region 6S. For example, when the fastening tape 4 is pulled in the X direction, the fastening tape 4 and the side panel 3 The joint strength is fixed to such an extent that it peels before the base material breaks. The specific bonding strength is not limited as long as it has the above-described bonding strength, but the strength of the strong bonding strength that causes the base material destruction in the first bonding region 6S varies depending on the strength of the base material. When the base material on the side panel 3 on which the fastening tape 4 is joined is a spunbonded nonwoven fabric, the joining strength is the tensile strength immediately before the material breakage, and is about 15 N / 25 mm or more and 40 N / 25 mm or less.
Although the specific bonding strength is not limited, the bonding strength of the second weak bonding region 6W is 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. Preferably it consists of:
Hereinafter, a method for measuring the bonding strength of the first bonding region 6S and the bonding region of the second weak bonding region 6W will be described. However, in the present invention (first invention), it is only necessary to have the relationship of the bonding strength described above. Other measurement methods are not particularly concerned.

<Measuring method of bonding 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 is used as a measurement sample, and the tensile speed is measured with a tensile testing machine (RTC-1150 manufactured by Orientec Co., Ltd.). Pulling at 300 mm / min, the second weakly bonded region 6W is first peeled off. The tensile strength at this time is defined as the joint strength of the second weak joint region 6W. The tensile strength immediately before the side panel 3 or the fastening tape 4 is broken is defined as the first bonding strength 6S.

As shown in FIG. 2, in the 1st joining area | region 6S of the diaper 1, while being joined by the adhesive agent, the several seal | sticker junction parts 61 formed by the crimping process by embossing, heat sealing, or ultrasonic sealing are included. Are joined through. In the 2nd weak junction area | region 6W of the diaper 1, as shown in FIG. 2, it is joined only through the some seal | sticker junction part 61 formed by the crimping process by embossing, heat sealing, or ultrasonic sealing. Thus, in the diaper 1, since the 1st junction area | region 6S is formed with the adhesive agent and the seal | sticker, and the 2nd weak junction area | region 6W is formed only with the seal | sticker, the 2nd weak junction area | region 6W is the 1st junction area | region. The bonding strength is weaker than the bonding strength of 6S. In the diaper 1, the first bonding region 6S having a high bonding strength is formed by an adhesive and a seal, and the second weak bonding region 6W having a low bonding strength is formed only by the seal. If the bonding region 6W has a bonding strength that is weaker than the bonding strength of the first bonding region 6S, for example, both the first bonding region 6S and the second weak bonding region 6W may be formed only by the adhesive. The first bonding region 6S and the second weak bonding region 6W may be formed only by the seal.

Specifically, in order to allow both the first bonding region 6S and the second weak bonding region 6W to be formed only by the adhesive, for example, the adhesive application basis weight of the first bonding region 6S is set to the second weak bonding region 6W. The application basis weight of the first joining region 6S is 10 to 50 g / m ² , and the application basis weight of the second weak joining region 6W is relative to the application basis weight of the first joining region 6S. Therefore, it should be less than 50%, preferably less than 20%. Alternatively, the first bonding region 6S is applied with a solid adhesive, and the second weak bonding region 6W is applied in a striped manner by intermittently arranging a plurality of application lines coated with a linear adhesive in the width direction. do it. As a third method, styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS) low-density polyethylene resin, ethylene acetate as an adhesive to be applied to the second weakly bonded region 6W It can also be obtained by applying a general hot melt resin such as a vinyl resin and applying a strong copolymerized polyamide hot melt resin as an adhesive to be applied to the first bonding region 6S.

In the case where the first bonding region 6S and the second weak bonding region 6W are formed only with an adhesive, for example, the first bonding region 6S is applied in a solid shape, and the second weak bonding region 6W is applied intermittently. Such an adhesive coating method can be changed, or the adhesive coating amount can be changed.

Moreover, when forming the 1st joining area | region 6S and the 2nd weak joining area | region 6W only by seal | stickers, such as a heat seal or an ultrasonic seal | sticker, the 1st joining area | region 6S is the skin side sheet | seat 31 or the non-skin of the side panel 3, for example. Sealing is performed under a temperature condition that matches the melting point of the fibers constituting the side sheet 32 or the melting point of the fibers constituting the tape base sheet 41, and the second weakly bonded region 6 </ b> W is separated from the skin side sheet 31 or the non-skin of the side panel 3. It can be formed by sealing under a temperature condition that is about 0 to 20% lower than the melting point of the fibers constituting the side sheet 32 or about 0 to 20% lower than the melting point of the fibers constituting the tape base sheet 41.
Moreover, the seal | sticker which forms the 1st joining area | region 6S and the 2nd weak joining area | region 6W can also be formed by the crimping | compression-bonding by embossing. For example, in a state where the embossing roll is temperature-controlled to the melting point of the fibers constituting the skin-side sheet 31 or the non-skin-side sheet 32 of the side panel 3 and the melting point of the fibers constituting the tape base sheet 41, respectively. After the constituent members are stacked, embossing is performed on portions corresponding to the first joining region 6S and the second weak joining region 6W. Thereby, the seal | sticker by crimping | compression-bonding can be formed.

As shown in FIG. 2, the joining region 6 composed of the first joining region 6S and the second weakly joining region 6W has a seal joining portion group 61G in which a plurality of small seal joining portions 61 are regularly arranged in the Y direction. A plurality of seal joint portions 61G are arranged in the X direction, and adjacent seal joint portions 61 and 61 forming another seal joint portion group 61G are arranged so as not to line up in the X direction. ing. Specifically, as shown in FIG. 2, the seal joint 61 of the diaper 1 is opposed to the vertically long first seal joint 611 having an angle with respect to the Y direction and the first seal joint 611. And a vertically long second seal joint portion 612. Here, facing the direction means that the first seal joint portion 611 is arranged symmetrically with respect to the first imaginary line IL1 (see FIG. 2) extending in parallel with the center line CL. This means that the angle with respect to the Y direction and the angle with respect to the Y direction of the second seal joint portion 612 coincide with each other. As shown in FIG. 2, the seal joint portion group 61G of the diaper 1 includes a first seal joint portion group 611G in which the first seal joint portions 611 are regularly spaced in the Y direction, and a second seal joint portion. 612 includes a second seal joint portion group 612G regularly arranged in the Y direction at intervals. In the joining region 6 of the diaper 1, as shown in FIG. 2, the first seal joint portion group 611G and the second seal joint portion group 612G are alternately arranged in two rows in the X direction. A first seal joint group 611G and a second seal joint group 612G are arranged in each of the joint region 6S and the second weak joint region 6W. Accordingly, the adjacent first seal joint portion 611 and second seal joint portion 612 forming another seal joint portion group 61G (the first seal joint portion group 611G or the second seal joint portion 612) are parallel to the X direction. Are not arranged in the Y direction, but are shifted in the Y direction.

As shown in FIG. 2, the second weakly bonded region 6 </ b> W includes a plurality of seal joints 61 (first seal joint 611 and second seal joint 612) and adjacent seal joints 61. (The first seal joint portion 611 and the second seal joint portion 612) include a non-seal joint portion 62 disposed between the two. Specifically, in the diaper 1, the second weakly joined region 6W is joined only via the plurality of seal joints 61 as shown in FIG. Between the first fusion part 611 and the second fusion part 612), the fastening tape 4 and the side panel 3 are not joined to each other. Thus, since the non-joining part 62 exists in the 2nd weak junction area | region 6W, it comes to be excellent in a softness | flexibility.

As described above, in the diaper 1, the first joining region 6S is joined via a plurality of seal joining portions 61 as shown in FIG. It is joined via. In the X direction, the adhesive joint 63 has a width including the widths of two rows of seal joint groups 61G (first seal joint group 611G and second seal joint group 612G) and is parallel to the center line CL. The fastening tape 4 is formed over the entire length of the fastening tape 4 in the Y direction. The adhesive joint portion 63 of the diaper 1 is formed to have a width that includes the width of the two rows of seal joint portions 61G, but is formed to have a width that matches the width of the two rows of seal joint portions 61G. May be. As described above, in the first joint region 6S, the gap between the adjacent seal joint portions 61 (the first seal joint portion 611 and the second seal joint portion 612) is fixed by the adhesive. In the region 6S, there is no non-joined portion 62 where the fastening tape 4 and the side panel 3 are not joined. In the first joining region 6S, the fastening tape 4 and the stretchable side panel 3 are fixed by fusion and an adhesive, so that the adhesive strength is improved as compared with the second weak joining region 6W.

Moreover, in the diaper 1, some seal | sticker junction parts 61 in the some melt | fusion part 61 straddle the outer side edge 3S1 in alignment with the main body longitudinal direction (Y direction) of the elastic | stretch side panel 3. FIG. It extends outward in the width direction (X direction). Specifically, a plurality of second seal joints constituting the second seal joint group 612G among the first seal joint group 611G and the second seal joint group 612G disposed in the second weak joint region 6W. Each part 612 extends outward in the X direction from the second weakly bonded region 6W beyond the outer side edge 3S1 of the side panel 3. In other words, a plurality of second seal joint portions 612 constituting the second fused portion group 612G disposed in the second weak joint region 6W are disposed across the outer side edge 3S1 of the side panel 3. . Thus, some of the plurality of seal joints 61 extend outward in the width direction across the outer side edge 3S1 along the longitudinal direction of the main body of the side panel 3. As a result, the side panel 3 is suppressed from being raised from the fastening tape 4 along the boundary where the fastening tape 4 extends from the outer side edge 3S1 of the side panel 3.

The length in the Y direction of the stretchable side panel 3 in the region (joining region 6) where the stretchable side panel 3 and the fastening tape 4 overlap is the same as the length in the Y direction of the fastening tape 4 in the overlapping region (joining region 6). It is longer than the length. Here, the length in the Y direction is the widest position in the 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. It means the length in The length in the Y direction of the stretchable side panel 3 in the overlapping region (joining region 6) is improved from the viewpoint of improving the operability without impairing the feeling of wearing, and acting inward on the skin facing surface side. The length in the Y direction of the fastening tape 4 in the overlapping region (joining region 6) is preferably 1.2 times or more and 3.5 times or less, and more preferably 1.4 times or more and 3.0 times or less. preferable.
The overlapping region (joining region 6) is 10% or more and 50% or less with respect to the total area of the stretchable side panel 3 when the stretchable side panel 3 in a natural state is viewed from the viewpoint of adhesive strength. Preferably, the range is 10% or more and 40% or less.
The area of the first junction region 6S is preferably the same or larger than the area of the second weak junction region 6W.
The first joining region 6S is preferably in the range of 40% or more and 80% or less with respect to the area of the overlapping region (joining region 6) from the viewpoint of improving the adhesive strength while maintaining the wearing feeling. More preferably, it is in the range of 50% to 70%.
From the same viewpoint, the second weakly bonded region 6W is preferably in the range of 20% to 60%, and in the range of 30% to 50% with respect to the area of the overlapping region (bonded region 6). More preferably it is.

The shape of the fused portion 61 (the first fused portion 611 and the second fused portion 612), which is a seal joint portion, is not particularly limited, and may be, for example, a circle or a rhombus other than a vertically long ellipse like the diaper 1. Arbitrary shapes such as triangles and polygons may be used. From the viewpoint of improving the adhesive strength, the seal pattern area of one seal joint 61 (one first seal joint 611 or one second seal joint 612) does not impair the wearing feeling. It is preferably ² mm ² or more and 30 mm ² or less, more preferably 2 mm ² or more and 20 mm ² or less. From the same viewpoint, the interval between the first fusion part 611 adjacent in the Y direction or the second seal joint part 612 adjacent in the Y direction is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm or less. preferable. From the same viewpoint, an interval between adjacent seal joints 61 adjacent to each other (interval between the first seal joint 611 and the second seal joint 612) is preferably 1 mm or more and 8 mm or less, and is 6 mm or less. More preferably it is. Further, from the same viewpoint, the number of the seal joints 61 (the first seal joint 611 and the second seal joint 612) is preferably 1 / cm ² or more and 16 / cm ² or less. More preferably, they are 2 pieces / cm ² or more and 10 pieces / cm ² or less. Further, the ratio of the total seal pattern area of the plurality of seal joint portions 61 (first seal joint portion 611 and second seal joint portion 612) to the area of the overlapping region (joint region 6) is 10% from the same viewpoint. It is preferably 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 unevenly near the end of the side panel 3 on the back side B side. Therefore, one seal joint 61 arranged on the outermost side in the width direction (X direction) and the crotch C side among the plurality of fused parts 61 has an inclination angle at the time of mounting. When the fastening tape 3 is pulled, a second imaginary line connecting the intersection PD1 of the side panel 3 and the fastening tape 4 on the crotch C side and the intersection PD2 of the side panel 3 and the absorbent main body 2 on the crotch C side It almost coincides with the inclination angle of IL2. That is, in the diaper 1, the diaper 1 is arranged on the most crotch part C side among the plurality of second seal joint portions 612 constituting the second seal joint portion group 612G disposed in the second weak joint region 6W of the joint region 6. When the fastening tape 3 is pulled during mounting, the inclination angle of the single second fusion part 612C thus made is substantially the same as the inclination angle of the second imaginary line IL2. In the diaper 1, the inclination angle of the plurality of second seal joint portions 612 constituting the second seal joint portion group 612G disposed in each of the first joint region 6S and the second weak joint region 6W of the joint region 6 is: All coincide with the inclination angle of the second seal joint portion 612C. The second fusion part 612C arranged on the most crotch part C side means a seal joint part in which half or more of the area is applied to the second weak joint region 6W.

Further, in the diaper 1, as shown in FIG. 3, the joining region 6 overlaps a part of the outer fixed end portion 33 </ b> O on the outer side of the elastic member 33 in the stretchable side panel 3. More specifically, in the diaper 1, the first joining region 6 </ b> S of the joining region 6 is a part of the outer fixed end portion 33 </ b> O of the elastic member 33, that is, the outer portion that forms the outer fixed end portion 33 </ b> O of the elastic member 33. It overlaps with a part of the side adhesive layer 36. The overlapping area of the first bonding region 6S and the outer side adhesive layer 36 is preferably in the range of 5% to 50%, more preferably 15% to 30% with respect to the area of the outer side adhesive layer 36. More preferably, it is the range of% or less.

When wearing the diaper 1, the fastening tape 4 is unfolded, the fastening tape 4 is pulled by hand, and the side panel 3 is extended, and the hook material 42 of the fastening tape 4 is pressed against the landing sheet 5. And stop.

The constituent material of the diaper 1 is demonstrated.
As the surface sheet 21, the back sheet 22, and the absorbent body 23 constituting the absorbent main body 2, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. . For example, as the surface sheet 21, a hydrophilic and liquid-permeable nonwoven fabric, a three-dimensional aperture film, or the like can be used. As the back sheet 22, a liquid-impermeable or liquid-impermeable film or non-woven fabric (for example, spunbond-meltblown-spunbond non-woven fabric, air-through non-woven fabric, spunbond non-woven fabric, spunlace non-woven fabric, needle punched non-woven fabric, etc.) is used. it can. Or you may use as a composite sheet which laminated | stacked these. Moreover, as the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held by the absorbent core 23 is made of water-permeable thin paper or non-woven fabric. Those coated with a core wrap sheet can be used. As the side sheet 24 constituting the three-dimensional guard, a film, a nonwoven fabric, a woven fabric, or a laminate sheet thereof can be used.
As the skin-side sheet 31 and the non-skin-side sheet 32 constituting the stretchable side panel 3, various sheet materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins are used without particular limitation. be able to.
For example, as the skin side sheet 31 and the non-skin side sheet 32, a nonwoven fabric, a woven fabric, a film, or a laminated sheet thereof can be used.

The elastic elastic member 33 constituting the stretchable side panel 3, the elastic member 25 constituting the three-dimensional guard, and the leg elastic member 26 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer. A thread-like or string-like elastic member made of a polymer, a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, or the like can be used. The plurality of elastic members 33 arranged on the stretchable side panel 3 are preferably arranged of the same type at the same elongation rate from the viewpoint of manufacturing cost, simplification of the manufacturing process, and the like.
As a preferable material of an adhesive for joining each member, including an adhesive for forming the main body side adhesive layer 35, the outer side adhesive layer 36, and the intermediate adhesive layer 37 of the stretchable side panel 3 , Amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid ester copolymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer Examples thereof include thermoplastic polymers such as polymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / propylene-styrene block copolymer (SEPS), and mixtures thereof. The adhesive is preferably a hot melt type.

The adhesive coating pattern for forming each adhesive layer 35, 36, 37 is preferably a so-called solid coating using a spray gun, a coater gun or the like as an adhesive coating machine. Using a bead gun, a spiral spray gun, an omega-shaped spray gun, a transfer roll, or the like as a machine, pattern coating such as a linear shape, a spiral shape, an omega shape, or a dot shape can be performed.

When the side panel 3 is not a stretchable side panel, various sheet materials conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Or these lamination sheets etc. can be used.

The hook material 42 and the tape base sheet 41 that form the fastening tape 4 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, as the hook material 42, “Magic tape (registered trademark)” (manufactured by Kuraray), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu (registered trademark)” (manufactured by Kanebo Bell Touch) The male member etc. in etc. can be used. As the tape base material sheet 41, a synthetic resin such as polyethylene, polypropylene, and polyethylene terephthalate, and a sheet or a nonwoven fabric made of a composite material of two or more of these synthetic resins can be used.

The effect at the time of using the disposable diaper 1 (henceforth "diaper 1") which is this embodiment of this invention (1st invention) mentioned above is demonstrated.
As shown in FIGS. 2 and 3, the diaper 1 has a bonding region 6 for bonding the fastening tape 4 and the side panel 3 to each other than the first bonding region 6S and the first bonding region 6S bonded by an adhesive. It is formed from a second weakly bonded region 6W having a bonding strength weaker than the bonding strength of the first bonding region 6S arranged adjacent to the outer side in the width direction (X direction). Therefore, as shown in FIG. 4, when the fastening tape 4 is pulled by hand when the diaper is worn and excessive tensile strength is applied to the joining region 6, the outer side of the side panel 3 is more outward than the first joining region 6S. In the second weakly bonded region 6W on the side edge 3S1 side, the fastening tape and the side panel are easily peeled to such an extent that the base material does not break. In this way, the second weakly bonded region 6W on the outer side edge 3S1 side of the side panel 3 is easily peeled off, so that the fastening tape 4 and the side panel 3 are broken due to the base material destruction in the first bonded region 6S. It is difficult and can maintain the wearing state of the diaper 1, and a usability improves.

Moreover, since the 2nd weak junction area | region 6W is distribute | arranged to the diaper 1 adjacent to the width direction (X direction) outer side rather than the 1st junction area | region 6S, as shown in FIG.2 and FIG.3, a diaper When wearing 1 or during use, the outer side edge 3S1 of the side panel 3 is difficult to bend or break, and the usability 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 a non-skin facing surface (on the Q side) of the stretchable side panel 3. The above effect is further exhibited. Further, since the second weakly bonded region 6W is arranged on the outer side in the width direction (X direction) than the first bonded region 6S, the outer side edge 3S1 of the side panel 3 is also formed during the manufacture and transportation of the diaper 1. It is difficult to drown or break, improving production efficiency.

Moreover, as shown in FIG.2 and FIG.3, the 1st junction area | region 6S is formed with the adhesive agent and the seal | sticker, and the 2nd weak junction area | region 6W is formed only with the seal | sticker. Thus, since the 2nd weak junction area | region 6W where the adhesive agent is not applied is distribute | arranged to the width direction (X direction) outer side rather than the 1st junction area | region 6S, apply an adhesive agent. When the first bonding region 6S is formed, the outer side edge 3S1 of the side panel 3 protrudes and is difficult to be applied to the fastening tape 4. Since it is difficult for the adhesive tape to be applied to the fastening tape 4 in this way, it is difficult for the adhesive to stick to other members due to the protrusion of the adhesive or to the skin or clothes, and the feeling of use is further improved. .

Moreover, as shown in FIG. 2, the diaper 1 includes a portion of the seal joints 61 in the plurality of seal joints 61 in the joint region 6 including the first joint region 6S and the second weak joint region 6W. The side panel 3 extends outward in the width direction (X direction) beyond the outer side edge 3S1. In other words, a 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 panel 3. . Therefore, when the diaper 1 is worn or used, the outer side edge 3S1 of the side panel 3 is more difficult to bend or break, and the usability is further improved.

In addition, as shown in FIG. 2, the diaper 1 has a fastening tape 4 attached unevenly near the end on the back side B side of the side panel 3, and is attached to the second weakly joined region 6 </ b> W of the joined region 6. The inclination angle of one second fusion part 612C arranged closest to the crotch part C side among the plurality of second fusion parts 612 constituting the arranged second fusion part group 612G is determined at the time of attachment. When the fastening tape 3 is pulled, it substantially coincides with the inclination angle of the second imaginary line IL2. When the fastening tape 3 is pulled at the time of mounting, a load is applied in a direction along the second imaginary line IL2. When peeling occurs in the second fusion part 612C closest to the crotch C at the position that is the starting point of the load, the inclination angle is substantially the same as the second imaginary line IL2. The amount of work required is maximized. The fastening tape 4 and the side panel 3 are hard to tear, the wearing state of the diaper 1 can be maintained, and a feeling of use improves.

In the diaper 1, as shown in FIG. 3, the first joining region 6 </ b> S of the joining region 6 is a part of the outer fixed end 33 </ b> O of the elastic member 33, that is, the outer fixed end 33 </ b> O of the elastic member 33. It overlaps with a part of the outer side adhesive layer 36 which forms That is, the fastening tape is directly interlocked with the elastic member 33. For this reason, even when the fastening tape 4 is pulled and a shock is applied at the time of mounting, the elastic member 33 is buffered, so that the joining region 6 is not easily broken and the feeling of use is reduced.

The disposable diaper of this invention (1st invention) is not restrict | limited at all to the diaper 1 of this embodiment mentioned above, It can change suitably.
For example, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, the side panel 3 has stretchability, but may be non-stretchability. Moreover, although the fastening tape 4 is attached only to the non-skin opposing surface (Q side surface) of the side panel 3, it may be attached only to the skin opposing surface (P side surface) of the side panel 3. .
Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, a part of the plurality of fusion portions 61 in the joining region 6 is formed on the outer side edge of the side panel 3. Although it extends outward in the width direction (X direction) beyond 3S1, it does not need to extend.

Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, the inclination angles of the plurality of second fusion parts 612 constituting the second fusion part group 612G arranged in the joining region 6 are as follows. Although it substantially coincides with the inclination angle of the second virtual line IL2, it does not need to coincide.
Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, the joining region 6 overlaps with a part of the outer fixed end portion 33 </ b> O on the outer side of the elastic member 33 in the side panel 3. The outer fixed end 33O may be disposed outward in the width direction (X direction).

Moreover, in the diaper 1 of the above-mentioned embodiment, as shown in FIG. 2, all the inclination angles of the plurality of second fusion parts 612 constituting the second fusion part group 612G arranged in the joining region 6 are all. The same, but not necessarily the same. For example, in the diaper 1A of another embodiment shown in FIG. 5, in addition to the form of the diaper 1, the outermost side in the width direction (X direction) and the backmost part of the plurality of fused portions 61. One seal joint 61 arranged on the B side, that is, a plurality of second seal joints 612 constituting the second seal joint group 612G disposed in the second weak joint region 6W of the joint region 6 Only the inclination angle of one second seal joint portion 612B arranged on the most back side portion B side is the back side portion between the side panel 3 and the fastening tape 4 when the fastening tape 3 is pulled during mounting. This substantially coincides with the inclination angle of the third imaginary line IL3 connecting the intersection point PU1 on the B side and the intersection point PU2 on the back side B of the side panel 3 and the absorbent main body 2. In addition, the 2nd seal | sticker junction part 612B distribute | arranged to the back | dorsal side part B side means the seal | sticker junction part in which the half or more of the area has applied to the 2nd weak junction area | region 6W.

In the diaper 1A, when the fastening tape 3 is pulled at the time of wearing, a load is applied in the direction along the second imaginary line IL2, and a load is also applied in the direction along the third imaginary line IL3. However, the inclination angles of the second fusion part 612C on the crotch part C side and the second fusion part 612B on the back side part B side at the position that is the starting point of this load are the two imaginary lines IL2. The inclination angle substantially coincides with the inclination angle of the third imaginary line IL3. Therefore, the fastening tape 4 and the side panel 3 are not easily torn, the wearing state of the diaper 1 can be maintained, and the usability is further improved.

Hereinafter, a disposable diaper according to the present invention (second invention) will be described based on a preferred first embodiment with reference to FIGS.
The disposable diaper 1B of the present embodiment (hereinafter also referred to as “diaper 1B”) is, as shown in FIG. 6, both sides of the back side portion B of the rectangular absorbent main body 2 including the liquid retaining absorbent body 23. The fastening tape 4 is attached to the outer side part 3S along the main body longitudinal direction (Y direction) of the stretchable side panel 3 extending from each part 2S.
As shown in FIG. 6, the diaper 1B is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.
Moreover, in this specification, a "skin opposing surface" is a surface distribute | arranged to a wearer's skin side at the time of wear among the front and back both surfaces of each member which comprises the diaper 1B, and the "P" side in FIG. It is the same surface as. In addition, the “non-skin facing surface” is a surface of the front and back surfaces of each member constituting the diaper 1B that is directed to the side opposite to the wearer's skin when worn, It is the same surface as the surface.
Further, the “Y” direction shown in each figure is the longitudinal direction (main body longitudinal direction) of the absorbent main body 2 of the diaper 1B, and is a direction parallel to the center line CL. The “X” direction shown in each figure Is the width direction (main body width direction) of the absorbent main body 2 of the diaper 1B, and is the direction perpendicular to the center line CL. Hereinafter, the diaper 1B will be specifically described.

As shown in FIG. 6, the absorptive main body 2 has a long rectangular shape in the Y direction, and when worn, the abdominal side portion A located on the abdomen side of the wearer, and the back side located on the back side of the wearer. It has part B and crotch part C located in the crotch part. The elastic side panels 3 and 3 extend outward in the X direction from both side edges 2S1 and 2S1 of the absorbent main body 2 to both side sections 2S and 2S along the Y direction of the absorbent main body 2 in the back side portion B, respectively. It is attached as follows.

As shown in FIG. 6, the absorbent main body 2 is disposed on the liquid-retaining absorbent body 23, the surface sheet 21 disposed on the skin facing surface side of the absorbent body 23, and the non-skin facing surface side of the absorbent body 23. Long and long in the Y direction that has an outer layer composite sheet and is divided into an abdominal side A, a dorsal side located on the dorsal side, and a crotch part arranged between the abdominal side and the dorsal side It is. That is, as shown in FIG. 6, the absorbent main body 2 includes a liquid-permeable surface sheet 21, a liquid-impermeable or liquid-permeable outer layer composite sheet 22 (including water repellency), and both the sheets 21. , 22 and a liquid retaining absorber 23 interposed between them. As shown in FIG. 6, each of the topsheet 21 and the outer layer composite sheet 22 covers the entire skin facing surface and the entire non-skin facing surface of the absorbent body 23, and extends from the periphery of the absorbent body 23. The extended portion is fixed by an adhesive such as hot melt or by fusion such as heat sealing. The top sheet 21 is the same as the length of the outer composite sheet 22 in the Y direction, but is shorter than the outer composite sheet 22 in the X direction. The outer layer composite sheet 22 is formed in the same shape as the absorbent main body 2 in plan view.

Further, a side sheet 24 is arranged on the side part 2S along the Y direction of the absorbent main body 2 via the surface sheet 21. The side sheet 24 is disposed on and fixed to the skin facing surface side of the top sheet 21 over the entire side portion 2S along the Y direction. The inner end (near the center line CL) in the X direction of the side seat 24 is a free end, and an elastic member 25 for forming a three-dimensional gather is extended in the Y direction near the free end of the crotch C. It is disposed and fixed, and when worn, due to the contraction force of the elastic member 25, a portion having a predetermined width from the free end is separated from the topsheet 21 to form a three-dimensional gather.

Also, the side sheet 2S along the Y direction of the absorbent main body 2 is joined with a side sheet 24 and an outer composite sheet 22 that extend outward in the X direction to form a flap part. In the diaper 1B, as shown in FIG. 6, an elastic member 26 for forming leg gathers is arranged and fixed in the Y-direction in an expanded state on the flap portion in the crotch C. When the diaper 1B is worn, the elastic member 26 contracts. Leg gathers are formed by the force.

As shown in FIG. 6, stretchable side panels 3, 3 extending outward in the width direction (X direction) are attached to both side portions 2 </ b> S, 2 </ b> S of the back side portion B of the absorbent main body 2, respectively. Fastening tape 4 is attached to the outer side in the width direction (X direction) of the conductive side panels 3 and 3. The arrangement relationship between the stretchable side panel 3 and the fastening tape 4 will be described with reference to the diaper 1B. As shown in FIG. 7, the Y-direction upper intersection PU1 between the absorbent main body 2 and the stretchable side panel 3, The stretchable side panel 3 has a region T1 that extends above the virtual line IL2 in the Y direction when the virtual line IL2 connecting the stretchable side panel 3 and the fastening tape 4 to the upper intersection PU2 in the Y direction is drawn. Fastening tape 4 is attached. Alternatively, as shown in FIG. 7, an imaginary line IL3 connecting the Y-direction lower intersection PD1 between the absorbent main body 2 and the stretchable side panel 3 and the Y-direction lower intersection PD2 between the stretchable side panel 3 and the fastening tape 4. The fastening tape 4 is attached to the stretchable side panel 3 so as to have a region T2 that extends below the imaginary line IL3 in the Y direction.
In the diaper 1B, as shown in FIG. 7, the stretchable side panel 3 and the fastening tape 4 are fixed so as to have two regions, a region T1 extending upward in the Y direction and a region T2 extending downward in the Y direction. However, it is only necessary that the stretchable side panel 3 and the fastening tape 4 are fixed so as to have either one of the region T1 extending upward in the Y direction and the region T2 extending downward in the Y direction.

In the diaper 1 </ b> B, as shown in FIG. 8, the stretchable side panel 3 is attached to the non-skin facing surface of the outer layer composite sheet 22 disposed on the side 2 </ b> S by various known methods. , 2S1 so as to extend outward in the X direction. In the diaper 1B, the stretchable side panel 3 is fixed to the non-skin facing surface of the outer layer composite sheet 22, but is disposed between the side sheet 24 disposed on the side portion 2S and the outer layer composite sheet 22. It may be fixed.

In the diaper 1 </ b> B, the stretchable side panel 3 includes a plurality of stretchable side panels 31 extending in the X direction between the skin-side sheet 31 positioned on the skin facing surface side and the non-skin-side sheet 32 positioned on the non-skin facing surface side. The elastic member 33 is fixed. Further, the length of the outer side portion 3s along the main body longitudinal direction (Y direction) of the stretchable side panel 3 is longer than the length of the main body longitudinal direction (Y direction) in the first joining region 6 of the fastening tape 4 described later. Is formed. Specifically, as shown in FIG. 7, the stretchable side panel 3 in the diaper 1 </ b> B has a rectangular shape or an outer side along the longitudinal direction of the main body (Y direction) of the stretchable side panel 3. If the length of the side edge is longer than the length of the main body longitudinal direction (Y direction) in the first joining region 6 of the fastening tape 4, the shape may include a trapezoid or a curve, and the stretchable side panel 3 is configured. The skin-side sheet 31 and the non-skin-side sheet 32 are also formed to have the same shape in plan view as the stretchable side panel 3 in a state of being spread in a planar shape. Each of the plurality of elastic members 33 is arranged along the X direction of the diaper 1 </ b> B and extends in the X direction. Further, the plurality of elastic members 33 in the stretchable side panel 3 are arranged at substantially equal intervals in the Y direction in the diaper 1B.

As described above, the elastic side panel 3 of the diaper 1B is formed by arranging and fixing a plurality of thread-like elastic members 33 between two nonwoven fabrics (skin-side sheet 31 and non-skin-side sheet 32). However, in the stretchable side panel 3, an elastomer film or a net made of an elastomer is arranged between two nonwoven fabrics (skin-side sheet 31 and non-skin-side sheet 32) instead of the thread-like elastic member 33. A fixed complex can be used. In addition, when using the thread-like elastic member 33, the cross-sectional shape includes a substantially circular and square shape, and a narrow band shape such as a rectangular shape.

Moreover, in the elastic side panel 3 of the diaper 1B, as shown in FIG.7 and FIG.8, the skin side sheet | seat 31 and the non-skin side sheet | seat 32 which comprise the elastic side panel 3 are the same shape and the same magnitude | size. However, the skin-side sheet 31 and the non-skin-side sheet 32 may be sized such that the extension length from the side edge 2S1 of the absorbent main body 2 is different. Thus, when the stretchable side panel 3 is formed using the skin side sheet 31 and the non-skin side sheet 32 having different extension lengths from the side edge 2S1, the outer side portion 3S of the stretchable side panel 3 is formed. The outer side in the X direction is formed by one sheet 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.

The thread-like elastic member 33 arranged on the stretchable side panel 3 has a width (dimension in the Y direction) and a diameter of 0.1 mm or more and 2 mm from the viewpoint of improving the flexibility of the stretchable side panel 3 and ensuring stretchability. Or less, more preferably 0.1 mm or more and 1 mm or less. Further, the number of the thread-like elastic members 33 arranged on the stretchable side panel 3 is preferably about 1 to 25, more preferably 3 to 20. Further, the elongation rate can be appropriately selected from conventionally known one, and a single elastic elastic member 33 having a stress of 0.1 N or more and 1 N or less when stretched to an elongation rate of 100% has an elongation rate of 50% or more and 300% or less. It is preferably disposed and fixed in a stretched state in a range of 100%, more preferably in a state of being stretched and fixed in a range of 100% to 250%. The elongation rate is the ratio of the length of the stretched portion to the natural length. For example, when a 10 cm length is stretched to 20 cm, the stretch rate is 100%.

In addition, when the elastic side panel 3 is formed by arranging and fixing an elastomer film or a net made of an elastomer instead of the thread-like elastic member 33, the stress per 25 mm width when expanded to 100% elongation is obtained. 3N / 25mm or more 25N / 25mm net is preferably arranged and fixed in a stretched state in a range of 50% to 300%, and stretched in a range of 100% to 250%. More preferably, it is formed by being fixed in a state.

The plurality of thread-like elastic members 33 in the stretched state are interposed between the skin-side sheet 31 and the non-skin-side sheet 32 via a plurality of adhesives (not shown) that cross each elastic member 33 and extend in the Y direction. While being fixed, the skin-side sheet 31 and the non-skin-side sheet 32 are directly joined to each other via the adhesives (not shown) at a portion where the elastic member 33 is not interposed. The plurality of adhesives (not shown) preferably all extend in the Y direction so as to intersect all the thread-like elastic members 33 extending in the X direction, and the total length of the stretchable side panel 3 in the Y direction. More preferably, A plurality of adhesives (not shown) are arranged at substantially equal intervals in the X direction. The stretchable side panel 3 is formed by applying a plurality of adhesives (not shown) to any one or both of the skin side sheet 31 and the non-skin side sheet 32 by various known methods, and after coating, those sheets A plurality of stretched thread-like elastic members 33 are fixedly formed by overlapping and pressing 31 and 32. As shown in FIGS. 7 and 8, the elastic member 33 in the stretchable side panel 3 formed in this way has an inward (close to the center line CL) fixed end 33I and an external fixed end 33O in the X direction. The inner fixed end portion 33I and the outer fixed end portion 33O no longer have contraction force and are not stretchable. The length of the outer fixed end portion 33O in the X direction is in the range of 10% or more and 40% or less of the total length of the thread-like elastic member 33 in the X direction in the natural state of the stretchable side panel 3 shown in FIG. Is preferable, and it is still more preferable that it is 15 to 35% of range. The length of the inner fixed end 33I in the X direction is the same as the length of the outer fixed end 33O in the X direction. The stretchable side panel 3 may be applied in combination with fixing by heat sealing or the like in addition to fixing by an adhesive (not shown).

In the diaper 1B, as shown in FIGS. 7 and 8, the skin side sheet 31 of the stretchable side panel 3 is more outward in the X direction than the outer fixed end portion 33O in the X direction of the plurality of thread-like elastic members 33. Similarly, the non-skin side sheet 32 also extends outward in the X direction from the outer fixed end portion 33O in the X direction of the plurality of elastic members 33. The extending portion 32S is provided. The extension portions 31S and 32S are fixed by applying pressure after applying the adhesive in a solid shape by various known methods. The extension portions 31S and 32S may be fixed to each other from the viewpoint that the outer side portion 3S of the stretchable side panel 3 is difficult to twist during use, in addition to fixing with an adhesive, You may combine.

The fastening tape 4 provided on the outer side portion 3S of the stretchable side panel 3 will be described in detail. There are a plurality of the fastening tapes 4 on the outer side of the tape base sheet 41 and the tape base sheet 41 in the X direction. And a hook member 42 having an engaging protrusion. The fastening tape 4 is folded before use, and is unfolded and used as shown in FIG. 8 at the time of use. As shown in FIG. 7, the fastening tape 4 of the diaper 1B has a rectangular shape that is long in the X direction in the unfolded state. The fastening tape 4 is formed by fixing a hook material 42 on the outer side in the X direction of the tape base sheet 41 formed to be equal to the shape of the fastening tape 4 in plan view. In addition, the landing sheet 5 which fixes the hook material 42 of the fastening tape 4 is provided in the outer surface of the stomach side part A of the diaper 1B.

The fastening tape 4 and the stretchable side panel 3 will be described in detail below. The fastening tape 4 is attached to the non-skin facing surface (Q-side surface) of the stretchable side panel 3 as shown in FIG. . Specifically, in the diaper 1 </ b> B, as shown in FIG. 8, the inner side of the fastening tape 4 in the X direction (near the center line CL) is a thread-like shape in the non-skin side sheet 32 constituting the stretchable side panel 3. The elastic member 33 is attached only to the extending portion 32S outward in the X direction relative to the outer fixed end portion 33O, and is attached only to the non-skin facing surface (Q-side surface) of the extending portion 32S.

7 and 8, the fastening tape 4 is spaced from the outer side edge 3S1 along the Y direction of the stretchable side panel 3 with an interval S from the absorbent main body 2 side to the stretchable side panel 3 and Bonded via the first bonding region 6. Therefore, as shown in FIGS. 7 and 8, the fastening tape 4 and the stretchable side panel 3 are not joined between the first joining region 6 and the outer side edge 3S1 of the stretchable side panel 3. The non-joining region 7 is formed continuously in the Y direction. The first bonding region 6 will be specifically described. In the diaper 1B, the first bonding region 6 is formed by heat sealing or ultrasonic sealing as shown in FIG. 8, and is formed by an adhesive. ing. Thus, when it forms by heat sealing or ultrasonic sealing, the 1st joining area | region 6 can be adjusted easily and the adhesive strength of the fastening tape 4 and the stretchable side panel 3 is easy to improve. Moreover, when it forms with an adhesive agent, it is excellent in the softness | flexibility of the 1st junction area | region 6. FIG. In the diaper 1B, since the fastening tape 4 and the stretchable side panel 3 are fixed by fusion and an adhesive, the adhesive 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 has a fused portion 61 in which the fastening tape 4 and the stretchable side panel 3 are fused using heat sealing or ultrasonic sealing. The fastening tape 4 and the stretchable side panel 3 are not fused. As shown in FIG. 7, the first joining region 6 has a fused portion group 61G in which a plurality of small-sized fused portions 61 are regularly arranged in the Y direction, and the fused portion group 61G is in the body width direction. A plurality of arrangements are arranged in the (X direction), and adjacent fusion parts 61 and 61 forming another fusion part group 61G are arranged so as not to line up in the main body width direction (X direction). More specifically, as shown in FIG. 7, the fused portion 61 of the diaper 1 </ b> B is opposed to the first elongated fused portion 611 having an angle with respect to the Y direction and the first fused portion 611. And a vertically long second fusion part 612. Here, facing the direction means that the first fused portion 611 is arranged in a Y direction symmetrical to the virtual line IL1 (see FIG. 7) extending in parallel with the center line CL. And the angle of the second fusion part 612 with respect to the Y direction are the same. As shown in FIG. 7, the fused portion group 61G of the diaper 1B includes a first fused portion group 611G in which the first fused portions 611 are regularly arranged at intervals in the Y direction, and a second fused portion. 612 is composed of a second fused portion group 612G that is regularly arranged in the Y direction at intervals. In the first bonding region 6 of the diaper 1B, as shown in FIG. 7, the first fusion part group 611G and the second fusion part group 612G are alternately arranged in two rows in the X direction. Therefore, the adjacent first fusion part 611 and second fusion part 612 forming another fusion part group 61G (the first fusion part group 611G or the second fusion part 612) are parallel to the X direction. Are not arranged in the Y direction, but are shifted in the Y direction. As shown in FIG. 7, a non-fused portion 62 is formed between adjacent fused portions 61 (the first fused portion 611 and the second fused portion 612). As described above, the presence of the non-fused portion 62 makes the first bonding region 6 flexible. The presence of the non-fused portion 62 makes it difficult for a crease to occur in the fused portion 61, so that the flexibility of the first bonding region 6 is improved.

And in the diaper 1B, the 1st junction area | region 6 has the adhesive bond part 63 which the fastening tape 4 and the elastic | stretch side panel 3 joined using the adhesive agent as shown in FIG. In the X direction, the adhesive bonding portion 63 corresponds to the width of four rows of fusion portion groups 61G (two rows of first fusion portion groups 611G and two rows of second fusion portion groups 612G). The fastening tape 4 is formed over the entire length of the fastening tape 4 in the Y direction so as to be parallel to the center line CL. Therefore, the non-joining area | region 7 which has a fixed width | variety (the same length as the space | interval S) is continuously formed in the Y direction parallel to the centerline CL. The adhesive bonding portion 63 of the diaper 1B matches the width of the four rows of fused portion groups 61G in the X direction. However, if the non-bonded region 7 can be secured, the four rows of fused portion groups 61G. It is not always necessary to match the width of.

The length in the Y direction of the stretchable side panel 3 in the region where the stretchable side panel 3 and the fastening tape 4 overlap (the region where the first joining region 6 and the non-joining region 7 are combined) is the fastening tape in the overlapping region. 4 is longer than the length in the Y direction. Here, the length in the Y direction means the length of the stretchable side panel 3 including the region where the stretchable side panel 3 and the fastening tape 4 overlap or the widest position in the fastening tape 4 portion. . The length in the Y direction of the stretchable side panel 3 in the overlapping region is a fastening tape in the overlapping region from the viewpoint of improving the operability without impairing the wearing feeling and applying an inward force to the skin facing surface side. 4 is preferably 1.2 times to 3.5 times the length in the Y direction, and more preferably 1.4 times to 3.0 times.
The overlapping region is preferably in the range of 10% or more and 50% or less with respect to the total area of the stretchable side panel 3 when the stretchable side panel 3 in a natural state is viewed from the viewpoint of adhesive strength. More preferably, it is in the range of 10% to 40%.
The first bonding region 6 is preferably in the range of 40% or more and 90% or less, and 50% or more and 85% or less, with respect to the area of the overlapping region, from the viewpoint of securing the non-bonding region 7 and adhesive strength. More preferably, it is in the range.
The non-joining region 7 is preferably in the range of 10% to 50% with respect to the area of the overlapping region, from the viewpoint of maintaining the degree of freedom of the side edge of the stretchable side panel 3 when worn, More preferably, it is in the range of not less than 40% nor more than 40%.

The shape of the fusion part 61 (the first fusion part 611 and the second fusion part 612) is not particularly limited, and may be, for example, a circle, a rhombus, a triangle, a polygon other than a vertically long ellipse like the diaper 1B. It may be an arbitrary shape such as. The seal pattern area of one fusion part 61 (one first fusion part 611 or one second fusion part 612) is designed not to impair the wearing feeling and from the viewpoint of improving the adhesive strength. It is preferably ² mm ² or more and 30 mm ² or less, more preferably 2 mm ² or more and 20 mm ² or less. From the same viewpoint, the interval between the first fusion part 611 adjacent in the Y direction or the second fusion part 612 adjacent in the Y direction is preferably 1 mm or more and 8 mm or less, and more preferably 6 mm or less. preferable. From the same point of view, the distance between the adjacent adjacent fusion parts 61 (the distance between the first fusion part 611 and the second fusion part 612) is preferably 1 mm or more and 8 mm or less, and is 6 mm or less. More preferably it is. Further, from the same viewpoint, the number of the fused portions 61 (the first fused portion 611 and the second fused portion 612) is preferably 1 / cm ² or more and 16 / cm ² or less. More preferably, they are 2 pieces / cm ² or more and 10 pieces / cm ² or less. Further, the ratio of the total seal pattern area of the plurality of fused portions 61 (the first fused portion 611 and the second fused portion 612) to the area of the first bonding region 6 is 10% or more and 70% from the same viewpoint. Preferably, it is preferably 10% or more and 50% or less.

The constituent material of the diaper 1B will be described.
As the surface sheet 21, the outer layer composite sheet 22, and the absorbent body 23 constituting the absorbent main body 2, those conventionally used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. it can. For example, as the surface sheet 21, a hydrophilic and liquid-permeable nonwoven fabric, a three-dimensional aperture film, or the like can be used. As the outer layer composite sheet 22, a liquid-impermeable or liquid-impervious (including water repellency) resin film and a nonwoven fabric produced by various manufacturing methods (for example, an air-through nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, a needle punch nonwoven fabric, etc.) The sheet | seat etc. which laminated | stacked can be used. Moreover, as the absorbent body 23, an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which water-absorbing polymer particles are held by the absorbent core 23 is made of water-permeable thin paper or non-woven fabric. Those coated with a core wrap sheet can be used. As the side sheet 24 constituting the three-dimensional guard, a film, a nonwoven fabric, a woven fabric, or a laminate sheet thereof can be used.
As the skin base sheet 31 and the non-skin side sheet 32 constituting the stretchable side panel 3 and the tape base material 42 of the fastening tape 4, various types conventionally used for absorbent articles such as disposable diapers and sanitary napkins. The sheet material can be used without any particular limitation.
For example, as the skin side sheet 31, the non-skin side sheet 32, and the tape base material 42, a nonwoven fabric, a woven fabric, a film, or a laminated sheet thereof can be used.

The elastic elastic member 33 constituting the stretchable side panel 3, the elastic member 25 constituting the three-dimensional guard, and the leg elastic member 26 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer. Furthermore, a thread-like or string-like elastic member made of a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene can be used. The plurality of elastic members 33 arranged on the stretchable side panel 3 are preferably arranged with the same type at the same elongation rate from the viewpoint of manufacturing cost, simplification of the manufacturing process, and the like.
Preferred materials for the adhesive for joining the members, including the adhesive for forming the adhesive joint 63 for fixing the fastening tape 4 and the stretchable side panel 3, include amorphous polyolefin, ethylene-acetic acid Vinyl copolymer (EVA), ethylene-acrylic acid ester copolymer (EEA), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / Examples thereof include thermoplastic polymers such as butylene-styrene block copolymer (SEBS) and styrene-ethylene / propylene-styrene block copolymer (SEPS), and mixtures thereof. The adhesive is preferably a hot melt type.

The hook material 42 and the tape base sheet 41 that form the fastening tape 4 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, as the hook material 42, “Magic tape (registered trademark)” (manufactured by Kuraray), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu (registered trademark)” (manufactured by Kanebo Bell Touch) The male member etc. in etc. can be used. As the tape base material sheet 41, a synthetic resin such as polyethylene, polypropylene, and polyethylene terephthalate, and a sheet or a nonwoven fabric made of a composite material of two or more of these synthetic resins can be used.

The effect at the time of using the disposable diaper 1B (henceforth "diaper 1B") which is 1st Embodiment of this invention (2nd invention) mentioned above is demonstrated.
As shown in FIGS. 7 and 8, the diaper 1 </ b> B has the fastening tape 4 attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3, and the fastening tape 4 and the stretchable side panel 3. The non-joining area | region 7 is continuously formed in the Y direction between the 1st joining area | region 6 which joins, and the outer side edge 3S1 of the elastic | stretch side panel 3. As shown in FIG. Since such a non-joining region 7 is formed, when the diaper 1B is worn, when the fastening tape 4 is pulled by hand and the elastic waist panel 3 is extended, the outer peripheral edge of the elastic waist panel 3 is As shown in FIG. 9, it becomes easy to face the skin facing surface (P-side surface) side. With the hook material 42 of the fastening tape 4 on the back side B side pressed against the landing sheet 5 on the abdominal side A side in a state facing the skin facing surface (P side surface) in this way, When clothes are put on the diaper 1B, the outer peripheral edge portion of the stretchable waist panel 3 becomes difficult to be caught, and the usability is improved.

Next, disposable diapers according to second to sixth embodiments of the present invention (second invention) will be described. The disposable diapers 1C to 1G of the second to sixth embodiments are different from the diaper 1B of the first embodiment in the manner of fixing the fastening tape 4 and the stretchable side panel 3. The diapers 1C to 1F of the second to sixth embodiments will be described mainly with respect to differences from the diaper 1B of the first embodiment, and the same points are denoted by the same reference numerals and description thereof will be omitted. About the point which is not mentioned especially, the description regarding the diaper 1B of 1st Embodiment is applied suitably.

The fixing between the fastening tape 4 of the diaper 1C and the stretchable side panel 3 will be described in detail.
In the diaper 1C, as in the diaper 1B, as shown in FIG. 10, the inner side (close to the center line CL) of the fastening tape 4 in the X direction is in the non-skin side sheet 32 constituting the stretchable side panel 3. The thread-like elastic member 33 is attached to only the extension part 32S outward in the X direction from the outer fixed end part 33O via the first joining region 6, and the non-skin facing surface (Q side of the extension part 32S) Surface) only through the first joining region 6. In this way, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3.

Moreover, in the diaper 1C, the fastening tape 4 and the elastic | stretch side panel 3 are being fixed with the melt | fusion and the adhesive agent similarly to the diaper 1B.
Similar to the diaper 1B, the first joining region 6 of the diaper 1C has a fused part 61 and a non-fused part 62 as shown in FIG.
As shown in FIG. 10, the fusion part 61 of the diaper 1 </ b> C has only a vertically long first fusion part 611 having an angle with respect to the Y direction. In the diaper 1 </ b> C, in the first bonding region 6, the first fused portion group 611 </ b> G extending in the Y direction formed by disposing the first fused portions 611 intermittently in the Y direction is formed in two rows in the X direction. Has been. The adjacent first fused portion 611 and the first fused portion 611 that form another first fused portion group 611G adjacent in the X direction are not shifted and are arranged at positions parallel to the X direction. Has been. As shown in FIG. 10, a non-fused portion 62 is formed between the adjacent fused portions 61.

And in the diaper 1C, the 1st junction area | region 6 has the adhesive bond part 63 which the fastening tape 4 and the elastic | stretch side panel 3 joined using the adhesive agent similarly to the diaper 1B. The adhesive bonding portion 63 substantially coincides with the width of the two rows of fused portion groups 611G in the X direction, and is continuous in the Y direction parallel to the center line CL, and the entire length of the fastening tape 4 in the Y direction. It is formed over. Therefore, the non-joining area | region 7 which has a fixed width | variety (the same length as the space | interval S) is continuously formed in the Y direction parallel to the centerline CL.

Describing the operational effects when using the diaper 1C described above, the effects of the diaper 1C are the same as the effects of the diaper 1B.

Next, the fixing between the fastening tape 4 of the diaper 1D and the stretchable side panel 3 will be described in detail.
In the diaper 1 </ b> D, as shown in FIG. 11, the first joint region 6 overlaps a part of the outer fixed end portion 33 </ b> O of the thread-like elastic member 33 in the stretchable side panel 3. In the diaper 1D, the non-skin side sheet 32 constituting the stretchable side panel 3 corresponding to the position of the outer fixed end 33O of the elastic member 33 on the inner side (near the center line CL) of the fastening tape 4 in the X direction. Are attached to the non-skin side sheet 32 via the first joining region 6 over the extending portion 32S outward in the X direction from the outer fixed end portion 33O of the elastic member 33. . Then, the inner side (closer to the center line CL) in the X direction of the fastening tape 4 is a part of the position of the non-skin side sheet 32 corresponding to the position of the outer fixed end portion 33O and the non-skin facing of each of the extending portions 32S. Only the surface (Q-side surface) is attached via the first bonding region 6. In this way, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3.

Moreover, in the diaper 1D, the fastening tape 4 and the elastic | stretch side panel 3 are being fixed by the melt | fusion and the adhesive agent similarly to the diaper 1B.
As shown in FIG. 11, the first joining region 6 of the diaper 1 </ b> D has a fused part 61 and a non-fused part 62, as in the diaper 1 </ b> B.
As shown in FIG. 11, the fusion part 61 of the diaper 1 </ b> D has only a vertically long first fusion part 611 having an angle with respect to the Y direction. In the diaper 1 </ b> D, in the first bonding region 6, the first fused portion group 611 </ b> G extending in the Y direction formed by intermittently arranging the first fused portions 611 in the Y direction is formed in two rows in the X direction. Has been. The adjacent first fused portion 611 and the first fused portion 611 that form another first fused portion group 611G adjacent in the X direction are not shifted and are arranged at positions parallel to the X direction. Has been. As shown in FIG. 11, a non-fused portion 62 is formed between adjacent fused portions 61.

And in the diaper 1D, the 1st junction area | region 6 has the adhesive bond part 63 which the fastening tape 4 and the elastic | stretch side panel 3 joined using the adhesive agent similarly to the diaper 1B. The adhesive bonding portion 63 substantially coincides with the width of the two rows of fused portion groups 611G in the X direction, and is continuous in the Y direction parallel to the center line CL, and the entire length of the fastening tape 4 in the Y direction. It is formed over. Therefore, the non-joining area | region 7 which has a fixed width | variety (the same length as the space | interval S) is continuously formed in the Y direction parallel to the centerline CL.

The effect at the time of using diaper 1D mentioned above is demonstrated.
About the effect of diaper 1D, a different point from the effect of diaper 1B is demonstrated. The point which is not demonstrated especially is the same as that of the effect of the diaper 1B, and description of the effect of the diaper 1B is applied suitably.
In the diaper 1 </ b> D, as shown in FIG. 11, the first joining region 6 overlaps a part of the outer fixed end portion 33 </ b> O of the thread-like elastic member 33 in the stretchable side panel 3. Therefore, the joining strength of the outer fixed end portion 33O of the elastic member 33 can be increased.

Next, the fixing of the fastening tape 4 and the stretchable side panel 3 of the diaper 1E will be described in detail.
In the diaper 1E, similarly to the diaper 1B, as shown in FIG. 12, the inner side (close to the center line CL) in the X direction of the fastening tape 4 is in the non-skin side sheet 32 constituting the stretchable side panel 3. The thread-like elastic member 33 is attached to only the extension part 32S outward in the X direction from the outer fixed end part 33O via the first joining region 6, and the non-skin facing surface (Q side of the extension part 32S) Surface) only through the first joining region 6. In this way, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3.

In the diaper 1E, the fastening tape 4 and the stretchable side panel 3 are fixed only by fusion.
The 1st junction area | region 6 of the diaper 1E has the melt | fusion part 61 and the non-fusion | fusion part 62 as shown in FIG. 12 similarly to the diaper 1B.
As shown in FIG. 12, the fusion part 61 of the diaper 1E has only a vertically long third fusion part 613 extending parallel to the X direction. In the diaper 1E, a third fused portion group 613G formed so as to protrude outward in the X direction by disposing the third fused portion 613 intermittently in the Y direction in the first joining region 6. , Two rows are formed in the X direction. As shown in FIG. 12, a non-fused portion 62 is formed between adjacent fused portions 61. As shown in FIG. 12, the first joining region 6 of the diaper 1 </ b> E is formed outwardly in the X direction, which is the apex at the position of the center line CL <b> 3 extending in the longitudinal direction of the fastening tape 4 by the two rows of fused portion groups 613 </ b> G. It has a convex shape. Therefore, the non-joining region 7 of the diaper 1E has a concave shape outward in the X direction. Specifically, the non-joining region 7 of the diaper 1E is formed such that the interval in the X direction gradually increases from the bottom located at the center line CL3 of the fastening tape 4 in the vertical direction of the center line CL3. The non-joining region 7 of the diaper 1E formed in this way is formed continuously in the Y direction, and the interval between the non-joining regions 7 becomes wide at both ends 7E and 7E in the non-joining region 7 in the Y direction. ing.

The first bonding region 6 of the diaper 1E is preferably in the range of 40% or more and 90% or less, and 50% or more and 85% with respect to the area of the overlapping region from the viewpoint of securing the non-bonding region 7 and adhesive strength. More preferably, it is the range of% or less.
The non-joining area | region 7 of the diaper 1E may be the range of 10% or more and 50% or less with respect to the area of the said overlapping area | region from a viewpoint of the freedom degree maintenance of the side edge part of the stretchable side panel 3 at the time of wear. Preferably, the range is 15% or more and 40% or less.

The shape of the fused portion 61 (third fused portion 613) is not particularly limited, and may be any shape such as a circle, a rhombus, a triangle, and a polygon other than a vertically long ellipse like the diaper 1E. May be. The third fusion part 613 fusion part 61 has a single seal pattern area, an interval adjacent to the Y direction, the number of arrangements, and the ratio of the total seal pattern area in the fusion part 61 (first fusion part) of the diaper 1B. It is the same as the wearing part 611 and the second fusion part 612).

The effect at the time of using the diaper 1E mentioned above is demonstrated.
About the effect of the diaper 1E, a different point from the effect of the diaper 1B is demonstrated. The point which is not demonstrated especially is the same as that of the effect of the diaper 1B, and description of the effect of the diaper 1B is applied suitably.
In the diaper 1E, as shown in FIG. 12, the interval between the non-joining regions 7 is wide at both ends 7E and 7E in the Y direction in the non-joining regions 7. Therefore, when wearing the diaper 1E, when the fastening tape 4 is pulled by hand and the stretchable waist panel 3 is extended, the outer peripheral edge of the stretchable waist panel 3 further becomes the skin facing surface (P side surface). ), The usability is further improved.

Moreover, as shown in FIG. 12, the 1st junction area | region 6 of the diaper 1E becomes convex shape to the X direction outward. Therefore, when the diaper 1E is worn, when the fastening tape 4 is pulled by hand, the tensile force applied to the first joining region 6 can be easily dispersed, and tearing can be prevented.

Next, fixing of the fastening tape 4 and the stretchable side panel 3 of the diaper 1F will be described in detail.
In the diaper 1F, as in the diaper 1B, the inner side (close to the center line CL) in the X direction of the fastening tape 4 is in the non-skin side sheet 32 constituting the stretchable side panel 3, as shown in FIG. The thread-like elastic member 33 is attached to only the extension part 32S outward in the X direction from the outer fixed end part 33O via the first joining region 6, and the non-skin facing surface (Q side of the extension part 32S) Surface) only through the first joining region 6. In this way, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3.

In the diaper 1F, the fastening tape 4 and the stretchable side panel 3 are fixed only by an adhesive.
The first joining region 6 of the diaper 1F has an adhesive joint 63 where the fastening tape 4 and the stretchable side panel 3 are joined using an adhesive. The adhesive joint portion 63 is formed over the entire length of the fastening tape 4 in the Y direction continuously in the Y direction. More specifically, as shown in FIG. 13, the first joining region 6 of the diaper 1F has an apex at the position of the center line CL3 extending in the longitudinal direction of the fastening tape 4 by the adhesive joining portion 63. It has an outwardly convex shape. Therefore, the non-joining region 7 of the diaper 1F has a concave shape outward in the X direction. Specifically, the non-joining region 7 of the diaper 1F is formed such that the interval in the X direction gradually increases from the bottom located on the center line CL3 of the fastening tape 4 toward the vertical direction of the center line CL3. The non-joining region 7 of the diaper 1F formed in this way is continuously formed in the Y direction, and the interval between the non-joining regions 7 is wide at both end portions 7E and 7E in the non-joining region 7 in the Y direction. ing.

From the viewpoint of adhesive strength, the first bonding region 6 of the diaper 1F is preferably in the range of 50% or more and 90% or less, and in the range of 60% or more and 90% or less with respect to the area of the overlapping region. Is more preferable.
The non-joining region 7 of the diaper 1F may be in the 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 when worn. Preferably, it is in the range of 10% or more and 40% or less.

The effect at the time of using the diaper 1F mentioned above is demonstrated.
About the effect of the diaper 1F, a different point from the effect of the diaper 1B is demonstrated. The point which is not demonstrated especially is the same as that of the effect of the diaper 1B, and description of the effect of the diaper 1B is applied suitably.
As for the diaper 1F, the space | interval of the non-joining area | region 7 is large in the both ends 7E and 7E of the Y direction in the non-joining area | region 7 as shown in FIG. Therefore, when wearing the diaper 1F, when the fastening tape 4 is pulled by hand and the stretchable waist panel 3 is extended, the outer peripheral edge of the stretchable waist panel 3 further becomes the skin facing surface (P-side surface). ), The usability is further improved.

Moreover, since the 1st junction area | region 6 of the diaper 1F is formed only with the adhesive agent, softness has improved and, as shown in FIG. 13, it has a convex shape outward in the X direction. Therefore, when the diaper 1F is worn, when the fastening tape 4 is pulled by hand, the tensile force applied to the first joining region 6 can be easily dispersed, and tearing can be prevented.

Next, fixation of the fastening tape 4 and the stretchable side panel 3 of the diaper 1G will be described in detail.
In the diaper 1G, similarly to the diaper 1B, as shown in FIG. 14, the inner side (close to the center line CL) of the fastening tape 4 in the X direction is in the non-skin side sheet 32 constituting the stretchable side panel 3. The thread-like elastic member 33 is attached to only the extension part 32S outward in the X direction from the outer fixed end part 33O via the first joining region 6, and the non-skin facing surface (Q side of the extension part 32S) Surface) only through the first joining region 6. In this way, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) 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 an adhesive.
The first joining region 6 of the diaper 1G has an adhesive joint 63 where the fastening tape 4 and the stretchable side panel 3 are joined using an adhesive. The adhesive joint portion 63 is formed over the entire length of the fastening tape 4 in the Y direction continuously in the Y direction. More specifically, as shown in FIG. 14, the first joining region 6 of the diaper 1G becomes the apex at a position above the center line CL3 extending in the longitudinal direction of the fastening tape 4 by the adhesive joining portion 63. , Has a convex shape outward in the X direction. Therefore, the non-joining region 7 of the diaper 1G has a concave shape outward in the X direction. Specifically, the non-joining region 7 of the diaper 1G has a bottom at a position above the center line CL3 of the fastening tape 4, and the interval in the X direction gradually increases from the bottom toward the vertical direction of the center line CL3. It is formed to spread. The non-joining region 7 of the diaper 1G formed in this way is continuously formed in the Y direction, and the interval between the non-joining regions 7 is narrowest above the center line CL3 of the fastening tape 4. .

The first joining region 6 of the diaper 1G is preferably in the range of 50% or more and 90% or less, and in the range of 60% or more and 90% or less with respect to the area of the overlapping region, from the viewpoint of adhesive strength. Is more preferable.
The non-joining region 7 of the diaper 1G may be 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 when worn. Preferably, it is in the range of 10% or more and 40% or less. Thus, the range of the first bonding region 6 of the diaper 1G is the same as the range of the first bonding region 6 of the diaper 1F.

The effect at the time of using the diaper 1G mentioned above is demonstrated.
About the effect of the diaper 1G, a different point from the effect of the diaper 1B is demonstrated. The point which is not demonstrated especially is the same as that of the effect of the diaper 1B, and description of the effect of the diaper 1B is applied suitably.
As for the diaper 1G, the space | interval of the non-joining area | region 7 is narrowest above centerline CL3 of the fastening tape 4, as shown in FIG. Therefore, when wearing the diaper 1G, when the fastening tape 4 is pulled by hand and the stretchable waist panel 3 is extended, the lower part of the outer peripheral edge of the stretchable waist panel 3 is more particularly the skin facing surface (P Since it becomes easy to face to the (side surface) side, a usability is further improved.

Moreover, since the 1st junction area | region 6 of the diaper 1G is formed only with the adhesive agent, softness has improved, and as shown in FIG. 14, it has a convex shape outward in the X direction. Therefore, when the diaper 1G is worn, when the fastening tape 4 is pulled by hand, the tensile force applied to the first joining region 6 can be easily dispersed, and tearing can be prevented.

The disposable diaper of this invention (2nd invention) is not restrict | limited at all to the diaper 1B of this embodiment mentioned above, It can change suitably.
The disposable diaper of the present invention (second invention) is not limited to the diapers 1B to 1G of the first to sixth embodiments described above, and can be changed as appropriate. The constituent elements of the diapers 1B to 1G of the first to sixth embodiments described above can be implemented in appropriate combination within a range not impairing the gist of the present invention (second invention).

For example, in the diapers 1B to 1G of the first to sixth embodiments described above, as shown in FIG. 7, FIG. 10, FIG. 11, FIG. 12, FIG. What is formed by fixing a plurality of thread-like elastic members 33 extending in the X direction between the side sheet 31 and the non-skin side sheet 32 is used instead. A film, a stretchable nonwoven fabric, a stretchable woven fabric, or a laminate sheet thereof may be used.

In the diapers 1B to 1G of the first to sixth embodiments described above, the fastening tape 4 is attached only to the non-skin facing surface (Q-side surface) of the stretchable side panel 3, as shown in FIG. However, what is necessary is just to be attached to the non-skin opposing surface (Q side surface) of the stretchable side panel 3 at least.

The parts of only one embodiment described above can be mutually used as appropriate within each invention (first and second inventions) or between each invention.

The following disposable diapers are further disclosed regarding the embodiment described above.

<1>
It has a liquid-retaining absorbent body, a top sheet disposed on the skin-facing surface side of the absorbent body, and a back sheet disposed on the non-skin-facing surface side of the absorbent body, and is positioned on the wearer's stomach side when worn An absorptive absorbent main body that is divided into a ventral part, a dorsal part located on the dorsal side, and a crotch part arranged between the ventral part and the dorsal part,
Stretchable side panels extending outward in the width direction are attached to both side portions on one end side in the longitudinal direction of the absorbent main body, and the width is formed on the outer side portion along the longitudinal direction of the main body of the stretchable side panel. A disposable diaper fitted with a fastening tape extending outward in the direction,
The fastening tape is attached to the non-skin facing surface of the stretchable side panel,
The fastening tape is spaced apart from an outer side edge along the longitudinal direction of the main body of the stretchable side panel to the absorbent main body side, via a first joining region joined to the stretchable side panel by an adhesive. Are joined together.
Between the joint region and the outer side edge of the stretchable side panel, the fastening tape and the stretchable side panel are not joined to each other in the width direction or outside the first joint region. A disposable diaper in which a second weakly bonded region having a bonding strength weaker than that of the first bonded region disposed adjacent to the side is continuously formed over the entire length in the longitudinal direction of the main body.

<2>
The first joining region is joined by an adhesive, and is joined through a plurality of seal joining portions formed by any one of crimping by embossing, heat sealing, or ultrasonic sealing <1>. Disposable diapers described in 1.
<3>
The 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 fastening tape is attached only to a non-skin facing surface of the side panel.
<5>
The disposable according to any one of <1> to <4>, wherein the second weakly bonded region is bonded only through a plurality of seal bonding portions formed by embossing, heat sealing, or ultrasonic sealing. Diapers.
<6>
The disposable diaper according to <5>, wherein the second weakly bonded region includes the plurality of seal bonded portions and non-bonded portions arranged between the adjacent bonded portions.
<7>
A part of the plurality of seal joints extends outward in the width direction across the outer side edge along the longitudinal direction of the main body of the side panel <5> or <6> Disposable diapers described in 1.
<8>
One seal joint disposed on the outermost side in the width direction and on the most crotch lower side among the plurality of seal joints is inclined when the fastening tape is pulled during mounting. The angle of inclination of a first imaginary line connecting the intersection of the side panel and the fastening tape on the crotch side and the intersection of the side panel and the absorbent main body on the crotch side is substantially the same <5> to The disposable diaper according to any one of <7>.
<9>
The stretchable side panel includes a plurality of thread-like elastic members extending in the body width direction between a skin-side sheet positioned on the skin facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. Any one of <3> to <8>, wherein the joining region is overlapped with a part of a fixed end portion on the outer side of the elastic member in the stretchable side panel. Disposable diapers.

<10>
<9> The disposable diaper according to <9>, wherein the stretchable side panel is formed by arranging and fixing a plurality of thread-like elastic members between a skin-side sheet and a non-skin-side sheet that are two nonwoven fabrics.
<11>
The disposable diaper according to <9> or <10>, wherein a cross-section of the thread-like elastic member in the stretchable side panel is a substantially narrow, square, or rectangular strip.
<12>
The thread-like elastic member disposed on the stretchable side panel preferably has a width or diameter of 0.1 mm to 2 mm, more preferably 0.1 mm to 1 mm. <9> to <11 > The disposable diaper in any one of>.
<13>
The number of thread-like elastic members disposed on the stretchable side panel is preferably 1 or more and 25 or less, more preferably 3 or more and 20 or less, and any one of <9> to <12> The disposable diaper according to 1.
<14>
One thread-like elastic member having a stress of 0.1 N or more and 1 N or less when the thread-like elastic member is stretched to 100% is stretched in a state where the elongation is within a range of 50% to 300%. The disposable diaper according to any one of <9> to <13>, which is preferably installed and fixed, and more preferably arranged and fixed in a stretched state in a range of 100% to 250%.
<15>
The stretchable side panel uses a composite in which an elastomer film or a net made of an elastomer is disposed and fixed between a skin-side sheet and a non-skin-side sheet, which are two nonwoven fabrics, <3> to <8 > The disposable diaper in any one of>.
<16>
The stretchable side panel in which the net made of an elastomer film or an elastomer is disposed and fixed is a net having a stress per 25 mm width of 3 N / 25 mm or more and 25 N / 25 mm when stretched to a stretch rate of 100%. The disposable diaper according to <15>, wherein the disposable diaper is disposed and fixed in a stretched state in a range of from 100% to 300%, and preferably disposed and fixed in a stretched state in a range of from 100% to 250%.
<17>
The side panel has an adhesive layer that fixes a plurality of thread-like elastic members between the skin-side sheet and the non-skin-side sheet, and the adhesive layer is on the absorbent main body side of each elastic member. Main body side adhesive layer for fixing end side, outer side adhesive layer for fixing end side of outer side of each side panel of each elastic member, and main body side adhesive layer and outer side The disposable diaper according to any one of <9> to <14>, wherein the disposable diaper has an intermediate adhesive layer disposed between the side adhesive layer and fixing two sheets.
<18>
A plurality of the intermediate adhesive layers are provided in a region between the main body side adhesive layer and the outer side adhesive layer, and the intermediate adhesive layer is any of the two adhesive layers in the diaper. The disposable diaper according to <17>, which has a smaller width and is intermittently disposed in the intermediate region in the width direction.
<19>
The main body side adhesive layer, the outer side adhesive layer and the intermediate adhesive layer intersect with each elastic member and extend in the longitudinal direction, and extend over the entire length in the longitudinal direction of the stretchable side panel <17. > Or the disposable diaper as described in <18>.

<20>
In the side panel, in a natural state in which the elastic member contracts, a plurality of ridges are formed on both sides of the side panel, and each ridge extends in the longitudinal direction so as to intersect with the plurality of elastic members. The wrinkles formed on the side panels are in a direction in which the two sheets are separated from the elastic member in each non-adhesive region due to the contraction of the elastic member between the main body side adhesive layer and the tip side adhesive layer. Any one of <3> to <19>, wherein each intermediate adhesive layer bulges in a convex shape and is formed in a concave shape toward the elastic member, and has an uneven shape. Disposable diapers.
<21>
The length in the longitudinal direction of the stretchable side panel in the joining region where the stretchable side panel and the fastening tape overlap is longer than the length in the longitudinal direction of the fastening tape in the overlapping joining region <3> to The disposable diaper according to any one of <20>.
<22>
The disposable diaper according to <21>, wherein the overlapping joining region is 1.2 times to 3.5 times the length of the fastening tape in the longitudinal direction, preferably 1.4 times to 3.0 times. .
<23>
The overlapping joining region is in the range of 10% to 50%, preferably 10% to 40%, with respect to the total area of the stretchable side panel when the stretchable side panel in a natural state is viewed in plan. The disposable diaper as described in <21> or <22> which is the following ranges.
<24>
The disposable diaper according to any one of <1> to <23>, wherein the seal joint portion has an elliptical shape, a circular shape, a diamond shape, a triangular shape, or a polygonal shape.
<25>
The disposable diaper according to <24>, wherein a seal pattern area of the seal 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 according to <24> or <25>, wherein an interval between the seal joint portions is 1 mm or more and 8 mm or less.
<27>
The fastening tape provided on the outer side portion of the stretchable side panel includes a tape base sheet and a hook member having a plurality of engaging protrusions on the outer side in the width direction of the tape base sheet. The fastening tape is folded before use and is unfolded before use, and the fastening tape has a rectangular shape that is long in the width X direction in the unfolded state, and the fastening tape is equal to the shape in plan view. The disposable diaper according to any one of <3> to <26>, wherein the hook base material is fixed to the outer side in the width direction of the formed tape base sheet.
<28>
The disposable diaper according to any one of <1> to <27>, wherein a landing sheet for fastening a hook material of a fastening tape is provided on an outer surface of the abdomen side portion of the disposable diaper.
<29>
The disposable diaper according to any one of <1> to <28>, wherein a side sheet is disposed on each side portion along the longitudinal direction of the absorbent main body via a surface sheet.
<30>
The side sheet is disposed and fixed across the entire side portion along the longitudinal direction on the skin-facing surface side of the top sheet, and the inner end portion in the width direction of the side sheet is a free end. In the crotch part, an elastic member for forming a three-dimensional gather is arranged and fixed in an elongated state in the longitudinal direction, and when worn, a portion having a predetermined width from the free end is caused by the contraction force of the elastic member. A three-dimensional gather is formed apart from the top sheet. Furthermore, on each side part along the longitudinal direction of the absorbent main body, a side sheet and a back sheet that extend outward in the width direction are joined to form a flap part. <29> The disposable diaper according to <29>, wherein an elastic member for leg gather formation is arranged and fixed in an extended state in the longitudinal direction on the flap portion, and the leg gather is formed by the contraction force of the elastic member when worn.

<31>
The length of the outer side edge along the main body longitudinal direction of the stretchable side panel is longer than the length in the main body longitudinal direction of the first joining region of the fastening tape. <1> to <30> The disposable diaper according to any one of the above.
<32>
The disposable diaper according to any one of <1> to <31>, wherein the first bonding region is formed by heat sealing or ultrasonic sealing.
<33>
The first joining region includes the fusion part where the fastening tape and the stretchable side panel are fused, and the non-fused part where the fastening tape and the stretchable side panel are not fused. The disposable diaper according to any one of> to <33>.
<34>
The first joining region has a fusion portion row in which a plurality of small-shaped fusion portions are regularly arranged in the longitudinal direction of the main body, and a plurality of the fusion portion rows are arranged in the width direction of the main body and are adjacent to each other. The disposable diaper according to any one of the above items <1> to <33>, wherein the fused portions are arranged so as not to line up in the body width direction.
<35>
The disposable diaper according to any one of <1> to <34>, wherein the first bonding region is formed of an adhesive.
<36>
The stretchable side panel fixes a plurality of elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. Formed,
The disposable diaper according to any one of <1> to <35>, wherein the first joining region overlaps a part of an outer fixed end portion of the elastic member in the stretchable side panel.
<37>
The stretchable side panel is formed from a composite in which an elastic film and a net made of an elastomer are overlapped between two non-woven fabrics and arranged and fixed in an extended state.
The disposable diaper according to any one of <1> to <36>, wherein the first joining region overlaps a part of an outer fixed end portion of the elastic member in the stretchable side panel.
<38>
The stretchable side panel fixes a plurality of elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. It is formed from a composite that is formed or stretched as an elastic member by overlapping an elastomer film and an elastomer net,
The disposable diaper according to any one of <1> to <37>, wherein the skin-side sheet and the non-skin-side sheet have different extension lengths from a side portion of the absorbent main body.
<39>
The disposable diaper according to any one of <1> to <38>, wherein the interval between the non-joining regions is wide at both ends in the longitudinal direction of the main body.
<40>
The disposable diaper according to any one of the above items <1> to <39>, wherein the non-bonded region is narrowest above the center line extending in the longitudinal direction of the fastening tape.

<41>
Each of the top sheet and the outer layer composite sheet covers the entire skin-facing surface and the non-skin-facing surface of the absorbent body, and extends from the periphery of the absorbent body. The disposable diaper according to any one of <1> to <40>, wherein the disposable diaper is fixed by fusion bonding such as an adhesive such as a melt or a heat seal.
<42>
The disposable diaper according to any one of <1> to <41>, wherein a side sheet is disposed on the side of the absorbent main body along the longitudinal direction of the main body (Y direction) via the top sheet.
<43>
The side sheet is on the skin facing surface side of the top sheet, and is disposed and fixed over the entire side part along the longitudinal direction of the main body (Y direction),
The inner end portion of the side seat in the body width direction (X direction) is a free end, and an elastic member for forming a three-dimensional gather is provided in the vicinity of the free end in the crotch portion in the body longitudinal direction (Y direction). <42>, wherein a three-dimensional gather is formed by attaching and fixing the elastic member in a stretched state so that a portion having a predetermined width from the free end is separated from the top sheet by the contraction force of the elastic member. Disposable diapers.
<44>
The side sheet along the longitudinal direction of the main body (Y direction) of the absorbent main body is joined to the side sheet and the outer composite sheet that extend outward in the width direction of the main body (X direction). The disposable diaper according to <42> or <43>, which is formed.
<45>
In the disposable diaper, an elastic member for forming leg gathers is arranged and fixed in an elongated state in the longitudinal direction of the main body (Y direction) on the flap portion in the crotch part. The disposable diaper according to <44>, wherein leg gathers are formed.
<46>
The disposable diaper according to any one of <1> to <45>, wherein the stretchable side panel is rectangular, trapezoidal, or curved.
<47>
The elastic side panel is provided with a thread-like elastic member,
The disposable diaper according to any one of <1> to <46>, wherein the thread-like elastic member disposed on the stretchable side panel has a width and a diameter of 0.1 mm to 2 mm.
<48>
The elastic side panel is provided with a thread-like elastic member,
The disposable diaper according to <47>, wherein the number of the elastic members disposed on the stretchable side panel is 1 or more and 25 or less.
<49>
The elastic side panel fixes a plurality of thread-like elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side Is formed,
The elastic member is fixed between the skin-side sheet and the non-skin-side sheet via a plurality of adhesives that intersect the elastic member and extend in the main body longitudinal direction (Y direction), and The disposable diaper according to any one of <1> to <48>, wherein the skin side sheet and the non-skin side sheet are directly bonded to each other through the adhesive at a portion where no elastic member is interposed.

<50>
Each of the plurality of adhesives intersects all elastic members extending in the main body width direction (X direction), extends in the main body longitudinal direction (Y direction), and extends in the Y direction of the stretchable side panel. The disposable diaper according to <49>, which extends over the entire length.
<51>
The stretchable side panel is the disposable diaper according to <49> or <50>, wherein the elastic side panel is combined with fusion fixing by heat sealing in addition to fixing by the adhesive.
<52>
The skin side sheet of the stretchable side panel extends outward in the body width direction (X direction) from the outer fixed end portion in the body width direction (X direction) of the plurality of thread-like elastic members. Similarly, the non-skin-side sheet has a protruding portion, and the plurality of thread-like elastic members are more outward in the body width direction (X direction) than the outer fixed end portion in the body width direction (X direction). The disposable diaper according to any one of <1> to <51>, wherein the disposable diaper has an extending portion extending to the top.
<53>
The fastening tape includes a tape base sheet and a hook member having a plurality of engagement protrusions on the outer side in the main body width direction (X direction) of the tape base sheet,
The disposable diaper according to any one of <1> to <52>, wherein the fastening tape is folded before use and is unfolded and used during use.
<54>
The fastening tape has a rectangular shape that is long in the width direction of the main body (X direction) in the unfolded state,
The hook material is formed on the outer side in the body width direction (X direction) of the tape base sheet formed equal to the shape of the fastening tape in plan view,
The disposable diaper according to <24>, wherein a landing sheet for fixing the hook material of the fastening tape is provided on an outer surface of the stomach side portion of the disposable diaper. <55>
The disposable diaper according to any one of <1> to <54>, wherein the fastening tape is attached only to a non-skin facing surface of the stretchable side panel.
<56>
The inner side of the fastening tape in the main body width direction (X direction) is more outward in the main body width direction (X direction) than the outer fixed end portion of the elastic member in the non-skin side sheet constituting the stretchable side panel. The disposable diaper according to any one of <1> to <55>, wherein the disposable diaper is attached only to the extension part and attached only to the non-skin facing surface of the extension part.
<57>
The fusion part includes a vertically long first fusion part having an angle with respect to the longitudinal direction of the main body (Y direction), and a vertically long second fusion part opposite to the first fusion part. The disposable diaper according to the above <33>.
<58>
The shape of the said fusion | fusion part is a disposable diaper as described in said <33> or <28> which is a vertically long ellipse, a circle, a rhombus, a triangle, and a polygon.
<59>
The disposable diaper according to <33>, <57>, or <58>, wherein a seal pattern area of the fused portion is 2 mm ² or more and 30 mm ² or less.

<60>
The length of the stretchable side panel in the longitudinal direction (Y direction) of the stretchable side panel in the region where the stretchable side panel and the fastening tape overlap is the length of the fastening tape in the longitudinal direction (Y direction) of the fastening tape. The disposable diaper according to any one of <1> to <59>, which is 1.2 times or more and 3.5 times or less.
<61>
The disposable diaper according to <60>, wherein the overlapping region is in a range of 10% to 50% with respect to a total area of the stretchable side panel when the stretchable side panel in a natural state is viewed from above. .
<62>
The disposable diaper according to <60> or <61>, wherein the first bonding region is in a range of 40% to 90% with respect to an area of the overlapping region.
<63>
The disposable diaper according to any one of <60> to <62>, wherein the non-bonded region is in a range of 10% to 50% with respect to an area of the overlapping region.
<64>
The fusion part has only a vertically long first fusion part having an angle with respect to the longitudinal direction of the main body (Y direction),
A fused portion group extending in the longitudinal direction of the main body (Y direction) formed by intermittently arranging the first fused portion in the longitudinal direction of the main body (Y direction) in the first joining region is formed in the width direction of the main body ( Two rows in the X direction)
The disposable diaper according to <33>, wherein a space between the adjacent fused portions is a non-fused portion.
<65>
The fusion part has only a vertically long third fusion part extending in parallel with the main body width direction (X direction),
In the first bonding region, the third fusion part is intermittently arranged in the longitudinal direction of the main body (Y direction), and the fusion part is formed to protrude outward in the main body width direction (X direction). The group is formed in two rows in the body width direction (X direction),
The first joining region has a convex shape outward in the body width direction (X direction), which is a vertex at the position of the center line extending in the longitudinal direction of the fastening tape, by the two rows of the fused portion groups. And
The non-joining region has a concave shape outward in the main body width direction (X direction),
The non-bonding region is formed such that the interval in the main body width direction (X direction) gradually increases from the bottom located at the center line of the fastening tape toward the vertical direction of the center line,
The non-joining regions are formed continuously in the main body longitudinal direction (Y direction), and the interval between the non-joining regions is wide at both ends of the non-joining region in the main body longitudinal direction (Y direction). 33> disposable diapers.
<66>
The fastening tape and the stretchable side panel are fixed only by an adhesive,
The first bonding region has an adhesive bonding portion where the fastening tape and the stretchable side panel are bonded using an adhesive,
The adhesive joint portion is formed over the entire length of the fastening tape in the body longitudinal direction (Y direction) continuously in the body longitudinal direction (Y direction),
The first joining region has a convex shape outward in the body width direction (X direction), which is the apex at the position of the center line extending in the longitudinal direction of the fastening tape by the adhesive joining portion,
The non-joining region has a concave shape outward in the main body width direction (X direction),
The non-bonding region is formed such that the interval in the main body width direction (X direction) gradually increases from the bottom located at the center line of the fastening tape toward the vertical direction of the center line,
The non-joining regions are formed continuously in the main body longitudinal direction (Y direction), and the interval between the non-joining regions is wide at both ends of the non-joining region in the main body longitudinal direction (Y direction). Disposable diaper as described in 1> or <31>.
<67>
The fastening tape and the stretchable side panel are fixed only by an adhesive,
The first bonding region has an adhesive bonding portion where the fastening tape and the stretchable side panel are bonded using an adhesive,
The adhesive joint portion is formed over the entire length of the fastening tape in the body longitudinal direction (Y direction) continuously in the body longitudinal direction (Y direction),
The first bonding region has a convex shape outward in the body width direction (X direction), which is a vertex at a position above the center line extending in the longitudinal direction of the fastening tape by the adhesive bonding portion. And
The non-joining region has a concave shape outward in the main body width direction (X direction),
The non-joining region has a bottom at a position above the center line of the fastening tape, and is formed so that the interval in the body width direction (X direction) gradually increases from the bottom toward the vertical direction of the center line. And
The non-bonding region is formed continuously in the longitudinal direction of the main body (Y direction), and the interval between the non-bonding regions is the narrowest above the center line of the fastening tape. 31> disposable diapers.
<68>
<1> to <67, wherein the bonding strength of the second weak bonding region is a bonding strength of 5% to 70%, more preferably 20% to 50%, with respect to the bonding strength of the first bonding region. > The disposable diaper in any one of>.
<69>
The non-bonding region is 10% or more and 50% or less, preferably 15% or more and 40% or less, with respect to the area of the region where the stretchable side panel and the fastening tape overlap with each other. 68> The disposable diaper in any one of 68.

According to the present invention (first invention), when a diaper is worn, a disposable diaper having an improved feeling of use is provided in which the fastening tape and the side panel are not easily torn due to substrate destruction.

ADVANTAGE OF THE INVENTION According to this invention, when wearing a diaper, the outer-periphery edge part of an elastic waist panel tends to face the skin opposing surface side, and the disposable diaper which the usability improved is provided.

Claims (69)

1. It has a liquid-retaining absorbent body, a top sheet disposed on the skin-facing surface side of the absorbent body, and a back sheet disposed on the non-skin-facing surface side of the absorbent body, and is positioned on the wearer's stomach side when worn An absorptive absorbent main body that is divided into a ventral part, a dorsal part located on the dorsal side, and a crotch part arranged between the ventral part and the dorsal part,
   Stretchable side panels extending outward in the width direction are attached to both side portions on one end side in the longitudinal direction of the absorbent main body, and the width is formed on the outer side portion along the longitudinal direction of the main body of the stretchable side panel. A disposable diaper fitted with a fastening tape extending outward in the direction,
   The fastening tape is attached to the non-skin facing surface of the stretchable side panel,
   The fastening tape is spaced apart from an outer side edge along the longitudinal direction of the main body of the stretchable side panel to the absorbent main body side, via a first joining region joined to the stretchable side panel by an adhesive. Are joined together.
   Between the joint region and the outer side edge of the stretchable side panel, the fastening tape and the stretchable side panel are not joined to each other in the width direction or outside the first joint region. A disposable diaper in which a second weakly bonded region having a bonding strength weaker than that of the first bonded region disposed adjacent to the side is continuously formed over the entire length in the longitudinal direction of the main body.
2. 2. The first joining region is joined by an adhesive and joined through a plurality of seal joining portions formed by any one of crimping by embossing, heat sealing, or ultrasonic sealing. Disposable diapers described in 1.
3. The disposable diaper according to claim 1 or 2, wherein the side panel is a stretchable side panel.
4. The disposable diaper according to any one of claims 1 to 3, wherein the fastening tape is attached only to a non-skin facing surface of the side panel.
5. The disposable according to any one of claims 1 to 4, wherein the second weakly joined region is joined only through a plurality of seal joints formed by embossing, heat sealing, or ultrasonic sealing. Diapers.
6. The disposable diaper according to claim 5, wherein the second weakly bonded region includes the plurality of seal bonded portions and a non-bonded portion disposed between the adjacent bonded portions.
7. 7. The joint part of the plurality of seal joint parts extends outward in the width direction across the outer side edge along the longitudinal direction of the main body of the side panel. Disposable diapers.
8. One seal joint disposed on the outermost side in the width direction and on the most crotch lower side among the plurality of seal joints is inclined when the fastening tape is pulled during mounting. The inclination angle of the first imaginary line connecting the intersection of the side panel and the fastening tape on the crotch side and the intersection of the side panel and the absorbent main body on the crotch side is approximately the same. The disposable diaper according to any one of 7 above.
9. The stretchable side panel includes a plurality of thread-like elastic members extending in the body width direction between a skin-side sheet positioned on the skin facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. The fixed bonding portion is formed, and the joining region overlaps with a part of a fixed end portion on the outer side of the elastic member in the stretchable side panel. Disposable diapers.
10. The disposable diaper according to claim 9, wherein the stretchable side panel is formed by arranging and fixing a plurality of thread-like elastic members between a skin-side sheet and a non-skin-side sheet which are two nonwoven fabrics.
11. The disposable diaper according to claim 9 or 10, wherein a cross-section of a thread-like elastic member in the stretchable side panel is a substantially circular, square, or rectangular strip.
12. The disposable diaper according to any one of claims 9 to 11, wherein the thread-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.
13. The disposable diaper according to any one of claims 9 to 12, wherein the number of thread-like elastic members disposed on the stretchable side panel is 1 or more and 25 or less.
14. One thread-like elastic member having a stress of 0.1 N or more and 1 N or less when the thread-like elastic member is stretched to 100% is stretched in a state where the elongation is within a range of 50% to 300%. The disposable diaper according to any one of claims 9 to 13, wherein the disposable diaper is fixed.
15. The stretchable side panel uses a composite in which an elastomer film or a net made of an elastomer is disposed and fixed between a skin sheet and a non-skin sheet that are two nonwoven fabrics. The disposable diaper as described in any one of Claims.
16. The stretchable side panel in which the net made of an elastomer film or an elastomer is disposed and fixed is a net having a stress per 25 mm width of 3 N / 25 mm or more and 25 N / 25 mm when stretched to a stretch rate of 100%. The disposable diaper according to claim 15, wherein the disposable diaper is formed by being arranged and fixed in a stretched state in a range of from% to 300%.
17. The side panel has an adhesive layer that fixes a plurality of thread-like elastic members between the skin-side sheet and the non-skin-side sheet, and the adhesive layer is on the absorbent main body side of each elastic member. Main body side adhesive layer for fixing end side, outer side adhesive layer for fixing end side of outer side of each side panel of each elastic member, and main body side adhesive layer and outer side The disposable diaper according to any one of claims 9 to 14, further comprising an intermediate adhesive layer arranged between the side adhesive layer and fixing two sheets.
18. A plurality of the intermediate adhesive layers are provided in a region between the main body side adhesive layer and the outer side adhesive layer, and the intermediate adhesive layer is any of the two adhesive layers in the diaper. The disposable diaper according to claim 17, wherein the disposable diaper has a width smaller than that of the diaper and is intermittently arranged in the intermediate region in the width direction.
19. The main body side adhesive layer, the outer side adhesive layer, and the intermediate adhesive layer extend in the longitudinal direction across the respective elastic members, and extend over the entire length in the longitudinal direction of the stretchable side panel. The disposable diaper according to 17 or 18.
20. In the side panel, in a natural state in which the elastic member contracts, a plurality of ridges are formed on both sides of the side panel, and each ridge extends in the longitudinal direction so as to intersect with the plurality of elastic members. The wrinkles formed on the side panels are in a direction in which the two sheets are separated from the elastic member in each non-adhesive region due to the contraction of the elastic member between the main body side adhesive layer and the tip side adhesive layer. The bulge in a convex shape, while each intermediate adhesive layer is formed in a concave shape toward the elastic member, and has a concavo-convex shape. Disposable diapers.
21. The length in the longitudinal direction of the stretchable side panel in the joining region where the stretchable side panel and the fastening tape overlap is longer than the length in the longitudinal direction of the fastening tape in the joining region. The disposable diaper according to any one of 20.
22. The disposable diaper according to claim 21, wherein the overlapping joining region is not less than 1.2 times and not more than 3.5 times the length in the longitudinal direction of the fastening tape.
23. The overlapping joining region is in a range of 10% to 50% with respect to the total area of the stretchable side panel when the stretchable side panel in a natural state is viewed in plan. Disposable diapers.
24. The disposable diaper according to any one of claims 1 to 23, wherein the seal joint has a shape of an ellipse, a circle, a diamond, a triangle, or a polygon.
25. The disposable diaper according to claim 24, wherein a seal pattern area of the seal joint portion is 2 mm ² or more and 30 mm ² or less.
26. The disposable diaper according to claim 24 or 25, wherein an interval between the seal joints is 1 mm or more and 8 mm or less.
27. The fastening tape provided on the outer side portion of the stretchable side panel includes a tape base sheet and a hook member having a plurality of engaging protrusions on the outer side in the width direction of the tape base sheet. The fastening tape is folded before use and is unfolded before use, and the fastening tape has a rectangular shape that is long in the width X direction in the unfolded state. The fastening tape is equal to the shape in plan view. The disposable diaper according to any one of claims 3 to 26, wherein a hook material is fixed to an outer side in the width direction of the formed tape base sheet.
28. The disposable diaper according to any one of claims 1 to 27, wherein a landing sheet for fastening a hook material of a fastening tape is provided on an outer surface of a ventral side portion of the disposable diaper.
29. The disposable diaper according to any one of claims 1 to 28, wherein a side sheet is disposed on each side portion along the longitudinal direction of the absorbent main body via a surface sheet.
30. The side sheet is disposed and fixed across the entire side portion along the longitudinal direction on the skin-facing surface side of the top sheet, and the inner end portion in the width direction of the side sheet is a free end. In the crotch part, an elastic member for forming a three-dimensional gather is disposed and fixed in an elongated state in the longitudinal direction near the free end. A three-dimensional gather is formed apart from the top sheet. Furthermore, on each side part along the longitudinal direction of the absorbent main body, a side sheet and a back sheet that extend outward in the width direction are joined to form a flap part. 30. The disposable diaper according to claim 29, wherein an elastic member for leg gather formation is disposed and fixed in an extended state in the longitudinal direction on the flap portion, and the leg gather is formed by the contraction force of the elastic member when worn.
31. The length of the outer side edge along the longitudinal direction of the stretchable side panel is formed longer than the length of the fastening tape in the longitudinal direction of the body in the first joining region. The disposable diaper described in the item.
32. The disposable diaper according to any one of claims 1 to 31, wherein the first joining region is formed by heat sealing or ultrasonic sealing.
33. 2. The first joining region includes a fusion part in which the fastening tape and the stretchable side panel are fused, and a non-fused part in which the fastening tape and the stretchable side panel are not fused. The disposable diaper according to any one of -32.
34. The first joining region has a fusion portion row in which a plurality of small-shaped fusion portions are regularly arranged in the longitudinal direction of the main body, and a plurality of the fusion portion rows are arranged in the width direction of the main body and are adjacent to each other. The disposable diaper according to any one of claims 1 to 33, wherein the fused portions are arranged so as to be shifted so as not to line up in the width direction of the main body.
35. The disposable diaper according to any one of claims 1 to 34, wherein the first joining region is formed of an adhesive.
36. The stretchable side panel fixes a plurality of elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. Formed,
    The disposable diaper according to any one of claims 1 to 35, wherein the first joint region overlaps a part of an outer fixed end portion of the elastic member in the stretchable side panel.
37. The stretchable side panel is formed from a composite in which an elastic film and a net made of an elastomer are overlapped between two non-woven fabrics and arranged and fixed in an extended state.
    The disposable diaper according to any one of claims 1 to 36, wherein the first joining region overlaps a part of an outer fixed end portion of the elastic member in the stretchable side panel.
38. The stretchable side panel fixes a plurality of elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side. It is formed from a composite that is formed or stretched as an elastic member by overlapping an elastomer film and an elastomer net,
    The disposable diaper according to any one of claims 1 to 37, wherein the skin-side sheet and the non-skin-side sheet have different extension lengths from a side portion of the absorbent main body.
39. The disposable diaper according to any one of claims 1 to 38, wherein an interval between the non-joining regions is wide at both ends in the longitudinal direction of the main body.
40. The disposable diaper according to any one of claims 1 to 39, wherein an interval between the non-joining regions is narrowest above a center line extending in a longitudinal direction of the fastening tape.
41. Each of the top sheet and the outer layer composite sheet covers the entire skin-facing surface and the non-skin-facing surface of the absorbent body, and extends from the periphery of the absorbent body. The disposable diaper according to any one of claims 1 to 40, wherein the disposable diaper is fixed by fusing such as an adhesive such as a melt or a heat seal.
42. The disposable diaper according to any one of claims 1 to 41, wherein a side sheet is disposed on a side portion of the absorbent main body along the longitudinal direction of the main body (Y direction) via the surface sheet.
43. The side sheet is on the skin facing surface side of the top sheet, and is disposed and fixed over the entire side part along the longitudinal direction of the main body (Y direction),
    The inner end portion of the side seat in the body width direction (X direction) is a free end, and an elastic member for forming a three-dimensional gather is provided in the vicinity of the free end in the crotch portion in the body longitudinal direction (Y direction). 43. The three-dimensional gathering according to claim 42, wherein the three-dimensional gather is formed by being disposed and fixed in a stretched state, and a portion having a predetermined width from the free end is separated from the top sheet by the contraction force of the elastic member when mounted. Disposable diapers.
44. The side sheet along the longitudinal direction of the main body (Y direction) of the absorbent main body is joined to the side sheet and the outer composite sheet that extend outward in the width direction of the main body (X direction). The disposable diaper according to claim 42 or 43, wherein the disposable diaper is formed.
45. In the disposable diaper, an elastic member for forming leg gathers is arranged and fixed in an elongated state in the longitudinal direction of the main body (Y direction) on the flap portion in the crotch part. The disposable diaper according to claim 44, wherein leg gathers are formed.
46. The disposable diaper according to any one of claims 1 to 45, wherein the stretchable side panel has a rectangular shape, a trapezoidal shape, or a curved shape in a state where the elastic side panel is expanded in a planar shape.
47. The elastic side panel is provided with a thread-like elastic member,
    The disposable diaper according to any one of Claims 1 to 46, wherein the thread-like elastic member disposed on the stretchable side panel has a width and a diameter of 0.1 mm to 2 mm.
48. The elastic side panel is provided with a thread-like elastic member,
    The disposable diaper according to claim 47, wherein the number of the elastic members disposed on the stretchable side panel is 1 or more and 25 or less.
49. The elastic side panel fixes a plurality of thread-like elastic members extending in the body width direction between a skin-side sheet positioned on the skin-facing surface side and a non-skin-side sheet positioned on the non-skin facing surface side Is formed,
    The elastic member is fixed between the skin-side sheet and the non-skin-side sheet via a plurality of adhesives that intersect the elastic member and extend in the main body longitudinal direction (Y direction), and The disposable diaper according to any one of claims 1 to 48, wherein the skin-side sheet and the non-skin-side sheet are directly bonded to each other through the adhesive at a portion where no elastic member is interposed.
50. Each of the plurality of adhesives intersects all elastic members extending in the main body width direction (X direction), extends in the main body longitudinal direction (Y direction), and extends in the Y direction of the stretchable side panel. The disposable diaper according to claim 49, which extends over the entire length.
51. The disposable diaper according to claim 49 or 50, wherein the stretchable side panel is applied in combination with fusion fixing by heat sealing in addition to fixing by the adhesive.
52. The skin side sheet of the stretchable side panel extends outward in the body width direction (X direction) from the outer fixed end portion in the body width direction (X direction) of the plurality of thread-like elastic members. Similarly, the non-skin-side sheet has a protruding portion, and the plurality of thread-like elastic members are more outward in the body width direction (X direction) than the outer fixed end portion in the body width direction (X direction). The disposable diaper according to any one of claims 1 to 51, wherein the disposable diaper has an extending portion extending to the top.
53. The fastening tape includes a tape base sheet and a hook member having a plurality of engagement protrusions on the outer side in the main body width direction (X direction) of the tape base sheet,
    The disposable diaper according to any one of claims 1 to 52, wherein the fastening tape is folded before use and unfolded during use.
54. The fastening tape has a rectangular shape that is long in the width direction of the main body (X direction) in the unfolded state,
    The hook material is formed on the outer side in the body width direction (X direction) of the tape base sheet formed equal to the shape of the fastening tape in plan view,
    The disposable diaper according to claim 24, wherein a landing sheet for fastening the hook material of the fastening tape is provided on an outer surface of the abdomen side portion of the disposable diaper.
55. The disposable diaper according to any one of claims 1 to 54, wherein the fastening tape is attached only to a non-skin facing surface of the stretchable side panel.
56. The inner side of the fastening tape in the main body width direction (X direction) is more outward in the main body width direction (X direction) than the outer fixed end portion of the elastic member in the non-skin side sheet constituting the stretchable side panel. The disposable diaper according to any one of claims 1 to 55, which is attached only to the extension part and attached only to the non-skin facing surface of the extension part.
57. The fusion part includes a vertically long first fusion part having an angle with respect to the longitudinal direction of the main body (Y direction), and a vertically long second fusion part opposite to the first fusion part. The disposable diaper of Claim 33 which has.
58. The disposable diaper according to claim 33 or 57, wherein a shape of the fused part is a vertically long ellipse, a circle, a diamond, a triangle, or a polygon.
59. The disposable diaper according to claim 33, 57 or 58, wherein a sealing pattern area of the fused part is 2 mm ² or more and 30 mm ² or less.
60. The length of the stretchable side panel in the longitudinal direction (Y direction) of the stretchable side panel in the region where the stretchable side panel and the fastening tape overlap is the length of the fastening tape in the longitudinal direction (Y direction) of the fastening tape. The disposable diaper according to any one of claims 1 to 59, wherein the disposable diaper is 1.2 times or more and 3.5 times or less.
61. The disposable diaper according to claim 60, wherein the overlapping region is in a range of 10% or more and 50% or less with respect to a total area of the stretchable side panel when the stretchable side panel in a natural state is viewed in plan.
62. The disposable diaper according to claim 60 or 61, wherein the first bonding region is in a range of 40% to 90% with respect to an area of the overlapping region.
63. The disposable diaper according to any one of claims 60 to 62, wherein the non-bonded region is in a range of 10% to 50% with respect to an area of the overlapping region.
64. The fusion part has only a vertically long first fusion part having an angle with respect to the longitudinal direction of the main body (Y direction),
    A fused portion group extending in the longitudinal direction of the main body (Y direction) formed by intermittently arranging the first fused portion in the longitudinal direction of the main body (Y direction) in the first joining region is formed in the width direction of the main body ( Two rows in the X direction)
    The disposable diaper according to claim 33, wherein a space between the adjacent fused portions is a non-fused portion.
65. The fusion part has only a vertically long third fusion part extending in parallel with the main body width direction (X direction),
    In the first bonding region, the third fusion part is intermittently arranged in the longitudinal direction of the main body (Y direction), and the fusion part is formed to protrude outward in the main body width direction (X direction). The group is formed in two rows in the body width direction (X direction),
    The first joining region has a convex shape outward in the body width direction (X direction), which is a vertex at the position of the center line extending in the longitudinal direction of the fastening tape, by the two rows of the fused portion groups. And
    The non-joining region has a concave shape outward in the main body width direction (X direction),
    The non-bonding region is formed such that the interval in the main body width direction (X direction) gradually increases from the bottom located at the center line of the fastening tape toward the vertical direction of the center line,
    The non-joining region is formed continuously in the longitudinal direction of the main body (Y direction), and the interval between the non-joining regions is wide at both ends of the non-joining region in the longitudinal direction of the main body (Y direction). The disposable diaper according to 33.
66. The fastening tape and the stretchable side panel are fixed only by an adhesive,
    The first bonding region has an adhesive bonding portion where the fastening tape and the stretchable side panel are bonded using an adhesive,
    The adhesive joint portion is formed over the entire length of the fastening tape in the body longitudinal direction (Y direction) continuously in the body longitudinal direction (Y direction),
    The first joining region has a convex shape outward in the body width direction (X direction), which is the apex at the position of the center line extending in the longitudinal direction of the fastening tape by the adhesive joining portion,
    The non-joining region has a concave shape outward in the main body width direction (X direction),
    The non-bonding region is formed such that the interval in the main body width direction (X direction) gradually increases from the bottom located at the center line of the fastening tape toward the vertical direction of the center line,
    The non-joining region is formed continuously in the longitudinal direction of the main body (Y direction), and the interval between the non-joining regions is wide at both ends of the non-joining region in the longitudinal direction of the main body (Y direction). The disposable diaper according to 1 or 31.
67. The fastening tape and the stretchable side panel are fixed only by an adhesive,
    The first bonding region has an adhesive bonding portion where the fastening tape and the stretchable side panel are bonded using an adhesive,
    The adhesive joint portion is formed over the entire length of the fastening tape in the body longitudinal direction (Y direction) continuously in the body longitudinal direction (Y direction),
    The first bonding region has a convex shape outward in the body width direction (X direction), which is a vertex at a position above the center line extending in the longitudinal direction of the fastening tape by the adhesive bonding portion. And
    The non-joining region has a concave shape outward in the main body width direction (X direction),
    The non-joining region has a bottom at a position above the center line of the fastening tape, and is formed so that the interval in the body width direction (X direction) gradually increases from the bottom toward the vertical direction of the center line. And
    The said non-joining area | region is continuously formed in the main body longitudinal direction (Y direction), and the space | interval of the said non-joining area | region is narrowest above the centerline of a fastening tape. The disposable diaper described.
68. The disposable diaper according to any one of claims 1 to 67, wherein a bonding strength of the second weak bonding region is a bonding strength of 5% to 70% with respect to a bonding strength of the first bonding region.
69. The disposable diaper according to any one of claims 1 to 68, wherein the non-bonded region is 10% or more and 50% or less with respect to an area of a region where the stretchable side panel and the fastening tape overlap.
    
    

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