JP5783711B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

Conventionally, in a rectangular absorbent main body including an absorbent body, a deployable type in which a stretchable side panel material extending and contracting in the width direction of the absorbent main body is attached to a portion disposed on the wearer's back side when worn. Disposable diapers are known. When wearing this disposable diaper, pull the side panel made of side panel material by hand, and fasten the fastening material provided at the tip to the outer surface etc. of the part arranged on the abdomen side of the absorbent main body And fix.
Moreover, since this stretchable side panel is often in contact with the wearer's skin when the diaper is worn, it is desired that the stretchable side panel has high air permeability.
As a side panel material forming a stretchable side panel, a panel material using a stretchable film or a panel material using a so-called thread rubber is known. In order to increase the thickness, a device such as perforating a film has been devised (for example, see Patent Document 1). However, if the perforated film is laminated with other sheets such as non-woven fabric, the moisture permeability and air permeability are likely to be reduced.If the perforated film is stretched, the opening area is reduced due to the neck-in and the moisture permeability and air permeability are reduced. easy.

  On the other hand, many of the panel materials using thread rubber have thread rubber fixed between the nonwoven fabrics with an adhesive, and are inherently relatively highly breathable. When the nonwoven fabric and the non-woven fabric are joined, the air permeability of the adhesive coating portion is hindered. In addition, if the adhesive is applied continuously in the longitudinal direction of the panel material (the direction along the longitudinal direction of the absorbent main body), the applied portion becomes more rigid and fits on the side of the wearer with a lot of body curvature. And the skin feels worse.

  The present applicant has proposed a composite stretchable member having a stretchable part composed of two sheet materials and a plurality of elastic members arranged between the two sheet materials in Patent Document 2. This composite elastic member has a configuration in which sheets are joined at a large number of dispersed joints, and an elastic member is arranged so as not to pass through those joints and is joined to a sheet material only at both ends thereof. doing. Since this composite stretchable member has excellent properties such as flexibility, it is also preferable to use it as a constituent material of the stretchable part of the disposable diaper. However, this composite stretchable member is used as a side panel material of the unfolded diaper described above. In such a case, when a strong tensile force is applied to the side panel, if the elastic member fixed at the end portion is removed, the stretchability of the entire region where the elastic member is disposed may be lost.

Special table 2009-523524 Japanese Patent Laid-Open No. 2005-080859

  Therefore, the subject of this invention is providing the disposable diaper which is excellent in the breathability and fitting property of a side panel, and is hard to impair the stretchability of a side panel even if strong tensile force is added.

  The present invention is a disposable diaper including an absorbent main body including an absorbent body and stretchable side panels extending from both side edges of the absorbent main body, and the side panel expands and contracts in the extending direction. In the stretchable part, a plurality of elastic members are arranged between the two nonwoven fabrics at intervals in the crossing direction of the extending direction, and the side panel A plurality of continuous joint portions are provided on the leading end side in the outgoing direction, and in each of the continuous joint portions, the plurality of elastic members are continuously arranged in the intersecting direction of the extending direction. A large number of fusion parts, which are fixed between the two nonwoven fabrics via an adhesive, and are distributed between the two nonwoven fabrics between the base end of the side panel and the continuous joint portion. And the elastic member passes through the fused portion. It has an intermediate stretch regions are arranged so as not, is to provide a disposable diaper.

  The disposable diaper of this invention is excellent in the breathability and fit property of a side panel, and even if a strong tensile force is added, the stretchability of a side panel is hard to be impaired.

FIG. 1: is the expansion | deployment top view which looked at the disposable diaper which is 1st Embodiment of this invention from the surface sheet side. FIG. 2 is a perspective view showing a wearing state of the disposable diaper shown in FIG. 1. FIG. 3 is an enlarged plan view showing a side panel of the disposable diaper shown in FIG. 1 and the vicinity thereof. FIG. 4 is an end view (contracted state) taken along the line IV-IV in FIG. FIG. 5 is an enlarged plan view (corresponding to FIG. 3) showing the side panel and the vicinity thereof in the second embodiment of the present invention. FIG. 6 is an enlarged plan view (corresponding to FIG. 3) showing a side panel and the vicinity thereof in still another embodiment of the present invention. FIG. 7 shows that a side panel in a diaper of a reference form in which the side panel has only one front end side continuous joint is pulled toward the front end side, so that a so-called rubber drop occurs in the elastic member of the side panel. It is a reference figure showing a state.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
As shown in FIG. 1, the disposable diaper 1 according to the first embodiment of the present invention includes an absorbent main body 2 including an absorbent body 23, and stretchable side panels 3 extending from both side edges of the absorbent main body 2. 3 is provided.

  As shown in FIG. 1, the absorbent main body 2 includes a liquid-permeable top sheet 21, a liquid-impermeable or water-repellent back sheet 22, and a liquid-retaining property interposed between the two sheets 21 and 22. And an absorber 23. As shown in FIG. 1, the absorbent main body 2 includes a top sheet 21 that forms the inner surface of the diaper 1 and a back sheet 22 that forms the outer surface of the diaper 1, with an absorber 23 interposed between the two sheets 21 and 22. It is formed by joining.

The absorbent main body 2 is provided with three-dimensional guard forming sheets 24 and 24 along both longitudinal sides thereof. The three-dimensional guard forming sheet 24 is fixed to the top sheet 21 and the back sheet 22 extending from the side edge of the top sheet at both longitudinal sides of the absorbent main body 2. Each three-dimensional guard forming sheet 24 has a three-dimensional guard-forming elastic member 25 along the edge in the vicinity of the inner edge in the width direction (X direction) of the absorbent main body 2. Due to the contraction force of the elastic member 25, a portion having a predetermined width from the edge is separated from the topsheet 21 to form a three-dimensional guard.
Moreover, the elastic member 26 for leg gather formation is distribute | arranged to the part distribute | arranged around the leg of the longitudinal direction both sides of the absorptive main body 2. At the time of wearing, a leg gather is formed by the contraction of the elastic member 26 and fits well around the legs.

The absorbent main body 2 has, when worn, a vertically long shape having an abdominal part A located on the abdomen side of the wearer, a back side part B located on the back side, and a crotch part C located on the crotch part. The side panels 3 and 3 extend from left and right edges of the absorbent main body 2 in the back side B in a direction (X direction) orthogonal to the longitudinal direction of the absorbent main body 2.
Further, the side panels 3 and 3 are provided with tabs 4 with fastening portions 41 on the leading ends in the extending directions (X directions). On the other hand, a landing zone 5 for fastening the fastening part 41 is provided on the outer surface of the ventral side A of the diaper 1. When the diaper 1 is worn, the tab 4 is pulled by hand, and the tab 4 2 is pressed against the landing zone 5 so that the tab 4 is fixed to the landing zone 5 and attached to the wearer. The tab 4 includes a tape base material 42 and a male member of a mechanical hook-and-loop fastener that is bonded to the tape base material 42 to form a fastening portion 41.

  As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to the longitudinal center line CL of the absorbent main body 2. Therefore, the configuration of the side panels 3 and 3 will be mainly described with respect to the configuration of the left side panel in FIG.

  As shown in FIG. 3, the side panel 3 has a rectangular shape in a state where the side panel 3 is expanded in a planar shape. Moreover, as shown in FIG.3 and FIG.4, the side panel 3 has the two nonwoven fabrics 31 and 32 and the several elastic member 33 arrange | positioned among them. Each of the elastic members 33 extends along the extending direction (X direction) of the side panel 3 that is the same as the width direction of the absorbent main body 2, and a plurality of the elastic members 33 are orthogonal to the extending direction. They are arranged at substantially equal intervals in the (Y direction). Further, the extending direction of the side panel 3 along the width direction of the absorbent main body 2 is also simply referred to as the X direction, and the direction intersecting the extending direction of the side panel is also simply referred to as the Y direction.

  The plurality of elastic members 33 arranged on the side panel 3 form the expansion / contraction part 30 that expands and contracts in the X direction on the side panel 3. The stretchable part 30 may extend over the entire length of the side panel 3 in the X direction, but in the present embodiment, portions excluding a predetermined width at both ends in the X direction of the side panel 3 are the stretchable parts 30. . The stretchable portion 30 is stretched in the X direction of the side panel 3 by the elastic stretching force of the elastic member 33.

  The side panel 3 in the present embodiment has three strip-shaped continuous joint portions 35 on the distal end side in the extending direction (X direction). These continuous joint portions 35 (hereinafter also referred to as “tip-side continuous joint portions”) are formed by joining two nonwoven fabrics 31 and 32 via an adhesive 35A as shown in FIG. The adhesive 35 </ b> A is continuously arranged in the Y direction of the side panel 3 as shown in FIG. 3.

  The adhesive 35 </ b> A that forms the continuous bonding portion 35 is arranged so as to fix all the elastic members 33 arranged on the side panel 3 to the nonwoven fabric 31 and / or 32. The adhesive 35 </ b> A that forms the continuous joint 35 is disposed from the position where the elastic member 33 is closest to the upper end edge 3 c of the side panel 3 to the position where the elastic member 33 is closest to the lower end edge 3 d. Preferably, in the plan view of the side panel 3, it is more preferable that the continuous joint portion 35 intersects all the elastic members 33.

Moreover, it is also preferable that the continuous joining part 35 is formed over the full length of the side panel 3 in the Y direction. The upper edge 3c of the side panel 3 is an edge located on the diaper waist end 2b side in the Y direction of the side panel 3, and the lower edge 3d is the crotch C side of the diaper in the Y direction of the side panel 3. Is the edge located at
In addition, the adhesive 35A for forming the continuous joint portion is applied to one of the nonwoven fabrics 31 and 32, and then the elastic member 33 is disposed on the coated portion, and the other nonwoven fabric is disposed thereon. It may be applied to both the nonwoven fabrics 31 and 32, and the elastic member 33 may be sandwiched between the coated portions. The same applies to the adhesive 37 </ b> A (described later) and the adhesive (not shown) that forms the central continuous joint 40.

The width W1 (see FIG. 3) in the X direction of the distal end side continuous joining portion 35 is from the viewpoint of making a hard portion as small as possible in the side panel and the necessity of firmly fixing the elastic member 33 between the nonwoven fabrics 31 and 32. 1 to 6 mm, particularly 2 to 5 mm.
Moreover, the width W2 (refer FIG. 3) between the front end side continuous joining parts 35 adjacent to a X direction is 2-8 mm from the point of the efficient expression of the expansion-contraction physical property of an elastic member, and a visual impression. It is preferable that it is 6 mm. Between the adjacent continuous joints 35 is a non-joint part 36 where the nonwoven fabric 31 and the nonwoven fabric 32 are not joined. In the non-joint part 36, the elastic member 33 and the nonwoven fabric 31 are elastic. Neither between the member 33 and the nonwoven fabric 32 nor between the nonwoven fabric 31 and the nonwoven fabric 32 is joined.

Also, from the viewpoint of ensuring good stretchability of the panel and ensuring moisture permeability and breathability, the length L1 in the X direction (a tip side continuous joint portion closest to the tip 3a) is formed. The distance from the edge on the distal end 3a side of 35 to the end edge on the proximal end 3b side in the distal end side continuous joint portion 35 closest to the proximal end 3b) is relative to the length L2 of the stretchable portion 30 of the side panel 3 It is preferably 10 to 50%, and more preferably 20 to 40%.
The dimensions described in the present specification are the same as the dimensions when the elastic member such as the elastic member 33 is extended and the side panel is expanded in a planar shape without any influence of the elastic member. Measure in the expanded state.

  The side panel 3 in the present embodiment also has a proximal-side continuous joint portion 37 having the same configuration as the above-described distal-side continuous joint portion 35 on the proximal end side in the extending direction (X direction). . The base end side continuous joining portion 37 is also formed by joining the two nonwoven fabrics 31 and 32 via an adhesive 37A, and the adhesive 37A is also formed on the side panel 3 as shown in FIG. Are arranged continuously in the Y direction. The adhesive 37 </ b> A that forms the base end side continuous joint portion 37 is disposed so as to fix all the elastic members 33 disposed on the side panel 3 to the nonwoven fabric 31 and / or 32. The adhesive 37 </ b> A that forms the base end side continuous joint portion 37 is also disposed from the position where the elastic member 33 is closest to the upper end edge 3 c of the side panel 3 to the position where the elastic member 33 is closest to the lower end edge 3 d. It is preferable that the base end side continuous joint portion 37 intersects all the elastic members 33 in a plan view of the side panel 3. Moreover, it is also preferable that the base end side continuous joining part 37 is formed over the full length of the side panel 3 in the Y direction.

  The width W3 (see FIG. 3) in the X direction of the base end side continuous joint portion 37 is required to firmly fix the elastic member 33 between the non-woven fabrics 31 and 32 in view of avoiding a hard part as much as possible on the side panel. From 1 to 6 mm, particularly 2 to 5 mm is preferable.

Further, in the side panel 3 in the present embodiment, a large number of fusion parts 39 are arranged between the two nonwoven fabrics 31 and 32 between the base end 3b of the side panel and the distal-side continuous joint 35. The elastic member 33 has a middle stretchable region 38 that is fused and disposed so as not to pass through the fused portion 39.
Specifically, between the distal end side continuous joint portion 35 and the proximal end side continuous joint portion 37 on the most proximal end 3b side of the distal end side continuous joint portion 35, the non-woven fabric 31, 32 is heated by heat embossing. A large number of fused dots 39 are formed, and these fused dots 39 are dispersed in the X direction and Y direction of the side panel 3.
In the present embodiment, the dot-like fusion part 39 forms a fusion part row S in which a plurality of (11 in the illustrated example) dot-like fusion parts 39 are arranged in series in the Y direction. The partial row S is formed in a plurality of rows (four rows in the illustrated example) in the X direction.

In the intermediate expansion / contraction region 38, all of the plurality of elastic members 33 arranged on the side panel are arranged so as to pass between the dot-shaped fused portions 39, 39 adjacent in the Y direction. The member 33 is also arranged so as not to pass through the dot-like fusion part 39.
These elastic members 33 are not joined to any of the nonwoven fabrics 31 and 32 in the intermediate stretchable region 38. However, the nonwoven fabrics 31 and 32 are in contact with the elastic member 33 more strongly than the other portions in the intermediate stretchable region 38 between the adjacent fusion portions 39 and 39 in the fusion portion row S.

When the diaper 1 of the first embodiment is attached to the wearer, the tab 4 is pulled by hand and the side panel 3 is extended, and the tab 4 is pressed against the landing zone 5 to be fixed.
As described above, when the diaper 1 is worn, or during wearing of the diaper 1 so worn, a strong tensile force may be applied to the side panel 3.
According to the diaper 1 of the present embodiment, even when a strong tensile force is applied to the side panel 3, the end portion where the tensile force is applied, particularly the end portion on the distal end side having the tab 4 where the force is easily concentrated, Since the plurality of continuous joint portions 35 are provided, even if the elastic member 33 is removed from one continuous joint portion 35, the fixed state by the other continuous joint portions 35 is maintained, so that the stretchability of the entire side panel is maintained. Is prevented from being damaged. On the other hand, for example, as shown in FIG. 7, in the case where there is one tip side continuous joining portion 35, if the elastic member 33 fixed at the joining portion 35 comes off from the joining portion 35, The stretched state of the elastic member is released, and the stretchability of the entire stretchable portion of the side panel may be impaired.

  The proximal end 3 b side of the side panel 3 in the X direction is more likely to be in direct contact with the skin while the diaper 1 is being worn. Although the center expansion-contraction area | region 38 in the diaper 1 of this embodiment is distribute | arranged to the site | part which is comparatively easy to touch skin, since the nonwoven fabrics 31 and 32 are joined by the fusion | melting part 39 distributedly arranged, side panel 3 Excellent moisture permeability and breathability are maintained, and skin troubles due to stuffiness are unlikely to occur. Moreover, since the fusion | melting part 39 is not continuously formed in the Y direction of a side panel, the center expansion-contraction area | region 38 is flexible. Therefore, the touch which touches skin is gentle and it is hard to give a wearer a discomfort. In addition, the side panel 3 of the present embodiment is less likely to neck-in when stretched, so that the tensile force is dispersed throughout the panel and the skin contact is more gentle.

  Furthermore, since the side panel 3 of the present embodiment has the distal end side continuous joint portion 37 having the above-described configuration also on the base end 3b side of the side panel, the elastic member 33 is also removed from the base end side of the side panel. Is unlikely to occur. Therefore, the stretchability of the side panel 3 is more reliably prevented from being impaired.

  Further, the fusion part 39 formed in the intermediate expansion / contraction region 38 forms a plurality of fusion part rows S in the X direction in which a plurality of fusion parts 39 are arranged in series in the Y direction. For this reason, when the elastic member 33 contracts, the two nonwoven fabrics 31 and 32 between the fused portion rows S are easily deformed into a convex cross section in a direction away from the elastic member 33, and a plurality of elastic members 33 are formed. It is easy to form the flange 34 extending in the Y direction across the surface. For this reason, the portion of the intermediate stretchable region 38 that contacts the wearer's skin becomes more flexible and the follow-up deformability is further improved, so that the touch or the like that contacts the skin is further improved.

From the viewpoint of more surely obtaining one or more effects as described above, the length L3 (see FIG. 3) of the intermediate stretchable region 38 in the X direction is the length L2 of the stretchable portion 30 of the side panel 3 (see FIG. 3). Reference) is preferably 50 to 90%, more preferably 60 to 80%.
Further, the total length in the X direction of the fused portion row S is preferably 5 to 40% and more preferably 10 to 20% with respect to the length L3 of the intermediate stretchable region 38 in the X direction. preferable.

The constituent material of the diaper 1 is demonstrated.
As the tape base material 42 of the nonwoven fabrics 31 and 32 and the tab 4 constituting the side panel 3, various nonwoven fabrics and the like conventionally used for absorbent articles such as disposable diapers and sanitary napkins are used without particular limitation. Can do.
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, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 21, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 22. be able to. 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 therein, a core wrap made of water-permeable thin paper or non-woven fabric. What was covered with the sheet | seat etc. can be used. As the three-dimensional guard forming sheet 24 constituting the three-dimensional guard, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

As the elastic member 33, the elastic member 25 constituting the three-dimensional guard, and the leg elastic member 26, natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene acrylate-ethylethylene, etc. A thread-like or string-like elastic member made of an α-olefin copolymer or the like can be used. As the thread-like or string-like elastic member, in addition to a circular or square cross section, a narrow band shape such as an elliptical or rectangular cross section can be used, and a multifilament type can also be used. .
The width (or diameter) of the elastic member 33 is, for example, 0.1 to 3 mm, and preferably 0.5 to 2 mm.
As the tab 4, a member obtained by attaching a hook member of a mechanical fastener to one surface of a tape base material such as a nonwoven fabric by heat fusion, an adhesive, or the like can be used.
It is preferable from the viewpoints of manufacturing cost, simplification of the manufacturing process, and the like that the elastic members 33 arranged on one side panel are arranged with the same type at the same elongation rate.

  Next, the disposable diaper of 2nd Embodiment of this invention is demonstrated with reference to FIG. The disposable diaper of 2nd Embodiment differs in the structure of a side panel from 1st Embodiment. In the second embodiment, differences from the first embodiment will be mainly described, and description of similar points will be omitted. For the points not particularly mentioned, the description relating to the first embodiment is applied as appropriate.

In the side panel 3A in the diaper of the second embodiment, as shown in FIG. 5, two distal-side continuous joints 35 and one proximal-side continuous joint 37 are formed. And the center continuous junction part 40 is formed between the front end side continuous junction part 35 and the base end side continuous junction part 37 in the extending direction (X direction) of the side panel 3A.
Then, an intermediate stretchable region 38A and an intermediate stretchable region 38B are formed on both sides of the central continuous joint 40 in the X direction.
In the intermediate stretchable regions 38A and 38B, a plurality of rows of fusion part rows S having the same configuration as the fusion part row in the intermediate stretchable region 38 of the first embodiment are formed. The intermediate expansion / contraction regions 38A and 38B have the same configuration as the intermediate expansion / contraction region 38 of the first embodiment, except that the number of fusion part rows S is different.
Moreover, the front end side continuous joining part 35 formed in the side panel 3A has the same configuration as that of the front end side continuous joining part 35 in the first embodiment, except that the provided number is different, and the side panel 3A. The proximal end side continuous joint portion 37 formed in the above has the same configuration as the proximal end side continuous joint portion 37 in the first embodiment.

  The central continuous joining portion 40 is also formed by joining the two nonwoven fabrics 31 and 32 via an adhesive (not shown), and the adhesive is also used as a side panel as shown in FIG. It is continuously arranged in the Y direction of 3A. The adhesive forming the central continuous joint 40 is arranged so as to fix all the elastic members 33 arranged on the side panel 3 </ b> A to the nonwoven fabric 31 and / or 32. The adhesive forming the central continuous joint 40 is also disposed from the position of the elastic member 33 closest to the upper edge 3c of the side panel 3A to the position of the elastic member 33 closest to the lower edge 3d. Preferably, it is more preferable that the central continuous joint portion 40 intersects all the elastic members 33 in a plan view of the side panel 3A. Moreover, it is also preferable that the center continuous joining part 40 is formed over the full length of the side panel 3 in the Y direction.

The width W4 (see FIG. 5) of the central continuous joint 40 in the X direction is from the viewpoint of making a hard part as much as possible in the side panel and the necessity of firmly fixing the elastic member 33 between the nonwoven fabrics 31 and 32. It is preferable that it is 1-6 mm, especially 2-5 mm.
Depending on the second embodiment, the same effects as the first embodiment can be obtained, and the following effects can be obtained.
Usually, at the front end side of the side panel, the pulling direction at the time of pulling to be attached is inclined or twisted, and a load is easily applied to the nonwoven fabric and the adhesive coating portion. Further, even during wearing, the nonwoven fabric is subjected to a tensile force that is not parallel to the twisting or stretching direction due to movement of the abdomen or legs, and a large load is applied. For this reason, the elastic member is likely to come off particularly at the elastic member fixing portion close to the tape base material joining portion. On the other hand, in the second embodiment, the central continuous joining portion 40 is provided near the central portion of the side panel 3A where the load applied to the nonwoven fabrics 31 and 32 and the adhesive coating portion due to the pulling direction at the time of mounting and the operation after mounting is less affected. By providing, the elastic member 33 can be more effectively prevented from being lost and the stretchability of the entire stretchable portion 30 can be prevented from being lost.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to said each embodiment, A various change is possible.

  For example, a plurality of proximal-side continuous joints 37 may be provided so as to be separated from each other in the X direction in the same manner as the distal-side continuous joint 35. FIG. 6 shows an example in which two tip side continuous joint portions 35 are provided. By providing a plurality of the distal end side continuous joining portions 35, it is possible to more reliably prevent so-called rubber removal of the elastic member 33 on the base end 3b side of the side panel.

Further, the number of the distal-side continuous joint portions 35 can be two as shown in FIG. 6 instead of three as shown in FIG. 3, or four or more (for example, 4 to 8). You can also. In addition, the number of fusion part rows S formed in the intermediate expansion / contraction region 38 is one, two, three, five or more (for example, 4 to 15) instead of the four shown in FIG. You can also. Further, the number of dot-like fused portions 39 constituting the fused portion row S can also be appropriately determined according to the number of elastic members 33 arranged on the side panel. Moreover, the shape of the dot-shaped fusion | melting part 39 can be made into appropriate shapes, such as a rectangle, an ellipse, a circle, an ellipse, a rhombus, a triangle, a pentagon.
Moreover, the number of the elastic members 33 arranged on one side panel can be changed as appropriate, for example, 5 to 20, preferably about 10 to 15.

Further, the fastening portion of the tab 4 may be an adhesive portion to which an adhesive is applied instead of the male member of the mechanical surface fastener. The landing zone for fastening the fastening portion 41 made of the male member of the mechanical hook-and-loop fastener may be formed by joining a female member of the mechanical hook-and-loop fastener to the outer surface of the backsheet 22. The outer surface may be made of a non-woven fabric with high engagement properties, and the predetermined area may be a landing zone.
In addition, a male member or the like of a mechanical surface fastener may be directly fixed in the vicinity of the tip 3a of the side panel 3 as the fastening portion 41.
Moreover, the fusion | melting part 39 provided in intermediate | middle expansion-contraction area | regions 38, 38A, 38B etc. may be formed by ultrasonic embossing and high frequency embossing other than heat embossing.

FIG. 4 shows an example in which the tape base material 42 of the tab 4 is fixed between the nonwoven fabrics 31 and 32 via an adhesive 42A. The tape base 42 may be fixed to the outer surface of the non-woven fabric 32 (the surface not the non-woven fabric 31) by an adhesive or heat-sealing. .
The fixing of the side panel 3 to the absorbent main body 2 is the same, and FIG. 4 shows an example in which the side panel is fixed between the solid guard forming sheet 24 and the back sheet 22 with an adhesive 27. However, the side panel may be fixed between the sheets constituting the absorbent main body 2 by heat fusion or the like, and the side panel is on the outer surface (the surface not the three-dimensional guard forming sheet 24 side) side of the back sheet 22. Further, it may be joined by an adhesive or heat fusion.
The disposable diaper may not have a three-dimensional guard, and the side panel may be fixed between the top sheet and the back sheet or on the top sheet at both sides of the absorbent main body 2.

  In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Absorbent main body 21 Top sheet 22 Back sheet 23 Absorber 24 Three-dimensional guard formation sheet 3, 3A Side panel 3a Tip 3b Base end 30 Stretchable portion 31, 32 Non-woven fabric 33 Elastic member 35 Tip side continuous joint (continuous Junction)
36 Non-joint portion 37 Base end side continuous joint portion 38, 38A, 38B Intermediate stretchable region 39 Dot-shaped fused portion (fused portion)
40 Central continuous joint 4 Tab 41 Fastening portion 42 Tape base material 5 Landing zone

Claims (2)

A disposable diaper comprising an absorbent main body including an absorbent body and stretchable side panels extending from both side edges of the absorbent main body,
The side panel has an expansion / contraction part that expands and contracts in the extending direction, and in the expansion / contraction part, a plurality of elastic members are provided at intervals in the crossing direction of the extending direction between the two nonwoven fabrics. Is arranged,
The side panel has a plurality of continuous joints on the distal end side in the extending direction, and in each of the continuous joints, the plurality of elastic members are crossed in the extending direction. It is fixed between the two nonwoven fabrics through an adhesive continuously arranged in the
Between the base end of the side panel and the continuous joining portion, the two nonwoven fabrics are fused in a number of dispersedly arranged fused portions, and the elastic member is a fused portion thereof. Propelled by one intermediate stretch regions are arranged so as not to pass through the,
The side panel has a base end side continuous joint on the base end side in the extending direction,
A center continuous joint is formed between the continuous joint formed on the distal end side in the extending direction of the side panel and the base end side continuous joint, and on both sides sandwiching the center continuous joint. The intermediate stretchable region is formed,
In each of the base end side continuous joint portion and the central continuous joint portion, the plurality of elastic members are arranged through the adhesive 2 continuously disposed in the crossing direction of the extending direction of the side panel. A disposable diaper that is fixed between non-woven fabrics .   The disposable diaper according to claim 1, wherein a plurality of rows of fused portions in which the plurality of fused portions are arranged in series in the intersecting direction are formed in the intermediate stretchable region in the extending direction.

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