JP5734622B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

  From the viewpoint of saving materials as much as possible, reducing waste as much as possible, environmentally friendly, and reducing costs, a side panel material with tabs with fastening parts is manufactured in a separate process, and a rectangle that includes an absorber An unfolded disposable diaper manufactured by adding this side panel material to a cylindrical absorbent main body is known (see, for example, Patent Document 1). In this type of disposable diaper, it is preferable that the side panel has stretchability from the viewpoint of wearability, and as the side panel material, generally formed using a stretchable film is used. However, since a stretchable film is expensive, it is preferable to form a side panel material using a so-called thread rubber which is a general-purpose member.

In addition, when a parent wears a deployable disposable diaper having a stretchable side panel on a child, the tab with a fastening portion provided on the side panel is pulled by hand, and the subjectivity of the parent is appropriate. After extending the side panel until it feels, the tab is fixed to the outer surface of the diaper via a fixing portion.
However, in such a mounting method, the side panel may be excessively stretched and fastened, so that the wearer's girth may be tightly tightened. There are problems such as restricting the movement of the wearer's legs and abdomen and attaching a trace of tightening to the skin due to poor followability to skin movement. .

  Patent Document 2 describes that a hot melt adhesive for fixing a so-called thread rubber to a panel material is intermittently applied in the expansion and contraction direction of the panel material. However, in that case, when the panel material is stretched, the elongation stress of the panel material rapidly increases immediately before the panel material is completely stretched, and the amount that can be further stretched from that position is small. For this reason, similarly to the above, there are cases where the wearer's waistline is tightly tightened, and there are problems such as restricting the movement of the wearer's legs and abdomen and attaching a trace of tightening to the skin.

  In addition, although this applicant proposed the composite elastic member which has an expansion-contraction part which consists of two sheet | seat materials and the some elastic member distribute | arranged between these both sheet materials in patent document 3, this patent Document 3 also describes that the composite stretchable member is used to form a near-tape stretchable portion that stretches in conjunction with a fastening tape in a disposable diaper. However, from the same viewpoint as Patent Document 2, there is a case where the wearer's waistline is tightly tightened, and there are problems such as restricting the movement of the wearer's legs and abdomen and attaching a trace of tightening to the skin. there were.

JP 2009-72472 A JP 2010-22588 A JP 2007-14802 A

  Therefore, the subject of this invention is providing the disposable diaper which a wearer's leg and the motion of an abdominal part are hard to be restricted, and the mark fastened to skin is hard to stick.

  The present invention is 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, and the side panel includes a plurality of side panels between two nonwoven fabrics. The elastic member of the book is in an extended state and has an expansion / contraction portion arranged with a space between each other, and a tab having a fastening portion is provided at the tip portion, which intersects the extending direction of the side panel. The elastic member has a first stretchable region that is continuously fixed between the two nonwoven fabrics, and does not have the tab in the intersecting direction, in a range having the tab in the intersecting direction. The elastic member has a second stretchable region that is intermittently fixed between the two nonwoven fabrics or is fixed between the two nonwoven fabrics only at both ends of the stretchable portion. Provide disposable diapers Than is.

  In the disposable diaper of the present invention, the movement of the wearer's leg or abdomen is not easily restricted, and the trace tightened on the skin is difficult to be attached.

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 taken along the line IV-IV in FIG. 5 is an end view taken along the line VV in FIG. 3 (end view taken along the line VI-VI). FIG. 6 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. 7 is an enlarged plan view (corresponding to FIG. 3) showing a side panel and the vicinity thereof in another embodiment of the present invention. FIG. 8 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. 9 is a schematic diagram showing the dimensions and the like of the side panels used in the examples and comparative examples. FIG. 10 is a graph showing SS curves (stress-strain curves) of Examples and Comparative Examples.

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.4 and FIG.5, the side panel 3 has the two nonwoven fabrics 31 and 32 and the several elastic member 33 arrange | positioned between 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.
As shown in FIG. 3, the side panel 3 according to the first embodiment has an elastic member 33 in a range H <b> 1 having a tab 4 in the intersecting direction (Y direction) that intersects the extending direction (X direction) of the side panel 3. The elastic member 33 has a first stretchable region E that is continuously fixed between the two nonwoven fabrics 31 and 32, and has no tabs 4 in the cross direction (Y direction). However, it has the 2nd expansion-contraction area | regions F and G currently fixed between the two nonwoven fabrics 31 and 32 intermittently.

  As shown in FIG. 3, a plurality of elastic members 33 are arranged in the first stretchable region E at intervals in the Y direction, and these elastic members 33 are arranged as shown in FIGS. 3 and 4. The entire longitudinal direction is joined to the nonwoven fabrics 31 and 32 via the adhesive 34. In addition, the nonwoven fabrics 31 and 32 in the first stretchable region E are joined to each other via an adhesive 34 in a range over a plurality of (four in the illustrated example) elastic members 33 in the Y direction. The hatched portion in FIG. 4 indicates a region where the two nonwoven fabrics 31 and 32 are joined by the adhesive 34.

  The side panel 3 in the first embodiment has ranges H2 and H3 that do not have the tab 4 above and below the range H1 that has the tab 4 in the Y direction. 2 It has stretchable areas F and G. Hereinafter, the second stretchable region F formed in the range H2 located below the range H1 is the lower second stretchable region F, and the second stretchable region G formed in the range H3 located above the range H1 is the top Also referred to as a second stretchable region G. The lower side of the range H1 having the tab 4 is on the crotch C side from the range H1 in the Y direction, and the upper side of the range H1 having the tab 4 is on the waist end 2b side from the range H1 in the Y direction. is there. The waist end 2b is an end portion of the diaper 1 that is disposed above the wearer (head direction) when worn.

As shown in FIG. 3, the lower second stretchable region F and the upper second stretchable region G are formed on the distal end 3 a side in the extending direction of the side panel 3 as joined portions where the nonwoven fabrics 31 and 32 are joined. The distal end side joining portion 35, the proximal end side joining portion 36 formed on the proximal end side of the side panel 3, and a plurality of intermediate portions formed between the distal end side joining portion 35 and the proximal end side joining portion 36. There are joint portions 37, 37. And as for the elastic member 33 distribute | arranged to the 2nd expansion-contraction area | regions F and G, as shown in FIG. 5, each of the front end side junction part 35, the intermediate | middle junction parts 37 and 37, and the proximal end side junction part 36, respectively. In FIG. 3, the non-woven fabrics 31 and 32 are fixed via an adhesive 34. On the other hand, in each X direction of 2nd expansion-contraction area | regions F and G, between the front end side junction part 35 and the intermediate junction part 37, between the intermediate junction part 37 and the intermediate junction part 37, and the intermediate junction part 37 and the base end Between the side joint portions 36, there are non-joint portions 38. In these non-joint portions 38, between the elastic member 33 and the nonwoven fabric 31, between the elastic member 33 and the nonwoven fabric 32, and between the nonwoven fabric 31 and the nonwoven fabric. Nothing between 32 is joined.
The distal end side joining portion 35, the intermediate joining portions 37, 37, and the proximal end side joining portion 36 each extend in a band shape along the Y direction, and one end of each Y direction is a nonwoven fabric in the first stretchable region E. It connects with the junction part 3c where 31 and 32 were joined.

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. At that time, the side panel 3 in this embodiment is formed with a first stretchable region E in which the elastic member 33 is continuously joined and second stretchable regions F and G in which the elastic member 33 is intermittently joined. Therefore, the tensile resistance increases abruptly at a relatively faster stage than when the stretchable part 30 is fully extended. At that stage, the tab 4 can be fixed to the landing zone 5 while the tab 4 is fixed to the landing zone 5, leaving sufficient room for further expansion on the side panel 3. Moreover, the increase amount of the tensile resistance when the side panel is further extended from that state is also suppressed as compared with the case where the entire surfaces of the nonwoven fabrics 31 and 32 are bonded.
Therefore, even if the wearer's waist and legs change during wearing, the side panel will follow and change well, making it difficult to move the wearer's legs and abdomen (scratching) and tightening tightly. It is possible to effectively prevent the skin from having marks (with marks).

Moreover, in this embodiment, since it has the lower 2nd expansion-contraction area | region F below the 1st expansion-contraction area | region E, the follower deformability of the wearer's leg periphery and the part which hits the vicinity is much better, and a leg periphery It is even less prone to scratches and marks in and around it.
Moreover, in this embodiment, since it has the upper 2nd expansion-contraction area | region G above the 1st expansion-contraction area | region E, the follow-up deformation property of the part which hits around the waist and its vicinity is further favorable, and around the waist and its vicinity Scratch and marks are less likely to occur.

From the viewpoint of more surely obtaining one or more effects as described above, the distance L1 between the distal end side joining portion 35 and the proximal end side joining portion 36 in the second stretchable regions F and G (see FIG. 5). Is preferably 50 to 95% of the distance L2 (see FIG. 5) from the base end 3b of the side panel 3 (the outer end of the portion fixed to the absorbent main body 2) to the tip 3a, More preferably, it is 75 to 85%.
Moreover, it is preferable that it is 5-45% with respect to the said distance L1, and, as for the total length of the X direction of the intermediate junction parts 37 and 37, it is more preferable that it is 10-20%.
Further, the elastic member 33 in the first stretchable region E extends from the end on the intermediate joint 37 side of the distal end side joint 35 in the X direction of the side panel 3 to the intermediate joint 37 side of the base end side joint 36. It is preferable that a range wider than the range up to the end is continuously fixed to the nonwoven fabrics 31 and 32.
Moreover, it is preferable that the length L30 (refer FIG. 4) of the X-direction of the expansion-contraction part 30 is 40 to 90% of the full length L3 (refer FIG. 4) of the X direction of the side panel 3, and is 55 to 75%. It is more preferable.
These distances and lengths are the same as when the elastic member such as the elastic member 33 is extended and the side panel becomes the design dimension (same as the dimension when the side panel is expanded in a flat state without any influence of the elastic member). Measure in the expanded state.

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.
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. 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.

As shown in FIG. 6, the side panel 3 </ b> A according to the second embodiment has a stretchable portion 30 that stretches in the extending direction (X direction).
The side panel 3A in the second embodiment has a first expansion region E in the first embodiment in a range H1 having a tab 4 in the crossing direction (Y direction) intersecting the extending direction (X direction) of the side panel 3A. While having the 1st expansion-contraction area | region E which has the same structure, the 2nd of a structure different from the 2nd expansion / contraction area | regions F and G in 1st Embodiment in the range H2, H3 which does not have the tab 4 in a cross direction (Y direction). It has stretchable regions F ′ and G ′.

  The second stretchable regions F ′ and G ′ in the second embodiment will be described in more detail. The side panel 3A in the second embodiment has tabs 4 respectively above and below the range H1 having the tabs 4 in the Y direction. The lower second stretchable region F ′ is formed in the range H2, and the upper second stretchable region G ′ is formed in the range H3.

As shown in FIG. 6, the lower second stretchable region F ′ and the upper second stretchable region G ′ are extended from the side panel 3 as joints where the nonwoven fabrics 31 and 32 are joined via an adhesive, respectively. A distal end side joint portion 35 formed on the distal end 3 a side in the direction, and a proximal end side joint portion 36 formed on the proximal end 3 b side of the side panel 3. Further, the lower second stretchable region F ′ and the upper second stretchable region G ′ have a dot-like joint portion 39 between the distal end side joint portion 35 and the proximal end side joint portion 36. The dot-shaped joint portions 39 are formed in the second stretchable regions F ′ and G ′ so as to be dispersed in the X direction and the Y direction, respectively.
The dot-shaped joint portion 39 in the second embodiment is formed by heat-sealing the nonwoven fabrics 31 and 32. A plurality of (three in the illustrated example) dot-like joints 39 formed in series in the Y direction are formed in a plurality of rows in the X direction.

  In addition, at least one elastic member 33 (two in the illustrated example) disposed in the lower second elastic region F ′ and the upper second elastic region G ′ is adjacent to the dot-shaped joints 39 in the Y direction. It is arranged to pass between 39. In addition, among the elastic members 33 arranged in the lower second elastic region F ′ and the upper second elastic region G ′, the elastic members arranged closest to the first elastic region E in each are the first elastic region E. Are arranged so as to pass between the joint 3c formed by the adhesive between the non-woven fabrics 31 and 32 and the dot-like joint 39 formed in the second stretchable regions F ′ and G ′.

The elastic members 33 arranged in the lower second stretchable region F ′ and the upper second stretchable region G ′ are bonded between the nonwoven fabrics 31 and 32 at the distal end side joint portion 35 and the proximal end side joint portion 36, respectively. On the other hand, it is not bonded to any of the nonwoven fabrics 31 and 32 between the distal end side joining portion 35 and the proximal end side joining portion 36 while being fixed via the agent.
In the lower second elastic region F ′ and the upper second elastic region G ′ in the contracted side panel 3A, the elastic member 33 contracts, and the two nonwoven fabrics 31 and 32 between the joint rows S are respectively A plurality of ridges (not shown) that are deformed into a convex cross section in a direction away from the elastic member 33 and extend across the plurality of elastic members 33 are formed.

According to the second embodiment, the same effects as those of the first embodiment are achieved.
Further, the elastic member 33 disposed in the lower second stretchable region F ′ is fixed between the nonwoven fabrics 31 and 32 only at the distal end side joint portion 35 and the proximal end side joint portion 36 located at both ends of the stretchable portion 30, Since it is not fixed between the distal end side joining portion 35 and the proximal end side joining portion 36, the flexibility and follow-up deformability of the portion around the wearer's leg and the vicinity thereof are further improved. It is less prone to scratches and marks in the vicinity.
Further, in the present embodiment, the elastic member 33 disposed in the upper second stretchable region G ′ has the nonwoven fabric 31, only at the distal end side joint portion 35 and the proximal end side joint portion 36 located at both ends of the stretchable portion 30. 32, and is not fixed between the distal end side joining portion 35 and the proximal end side joining portion 36, so that the flexibility and follow-up deformability of the portion around the waist of the wearer and the vicinity thereof are further improved. Yes, it is less prone to scratches and marks around and around the legs.

From the viewpoint of more reliably obtaining one or more effects as described above, the distance L1 between the distal end side joint portion 35 and the proximal end side joint portion 36 in the second stretchable regions F ′ and G ′ (FIG. 6). Reference) is preferably 50 to 95% of the distance L2 (see FIG. 6) from the base end 3b of the side panel 3 (the outer end of the portion fixed to the absorbent main body 2) to the tip 3a, and 75 More preferably, it is -85%.
Moreover, it is preferable that it is 5-45% with respect to the said distance L1, and, as for the total length of the X direction of the junction part row | line | column S, it is more preferable that it is 10-20%.
In addition, the elastic member 33 in the first stretchable region E extends from the end on the joining portion row S side in the distal end side joining portion 35 to the joining portion row S side in the proximal end joining portion 36 in the X direction of the side panel 3. It is preferable that a range wider than the range up to the end is continuously fixed to the nonwoven fabrics 31 and 32.

  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, as shown in FIG. 7, the lower second expansion / contraction having the same configuration as the lower second expansion / contraction region F ′ of the second embodiment is provided in the range H2 below the range H1 having the tab 4 and not having the tab 4. The upper second stretchable region having the same configuration as the upper second stretchable region G of the first embodiment is provided in the range H3 not provided with the tab 4 while being provided with the region F ′. G can also be provided.
Further, as shown in FIG. 8, a lower second stretchable region having the same configuration as the lower second stretchable region F of the first embodiment in a range H2 below the range H1 having the tab 4 and not having the tab 4. On the other hand, the upper second stretchable region G ′ having the same configuration as the upper second stretchable region G ′ of the second embodiment is provided in the range H3 above the range H1 having the tab 4 and not having the tab 4 while providing F. It can also be provided.

  Further, the range that does not include the tab 4 in the Y direction may exist only in one of the upper and lower sides of the range H1 that includes the tab 4.

Further, the number of intermediate joints 37 formed in the upper and / or lower second stretchable region may be one instead of two shown in FIG. 3, or three or more (for example, 3 to 10). You can also. Also, the number of the joint rows S formed in the upper and / or lower second stretchable region is one, two, four or more (for example, 4 to 15) instead of the three shown in FIG. You can also Further, the number of dot-like joint portions 39 constituting the joint row S may be one, two, or four or more (for example, 4 to 15) instead of three.
In addition, the shape of the dot-like joint formed in the upper and / or lower second stretchable region can be an appropriate shape such as a rectangle, an ellipse, a circle, an ellipse, a rhombus, a triangle, or a pentagon.
Also, the number of elastic members 33 arranged on one side panel can be changed as appropriate, but can be 5 to 20, for example, 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.
Further, the dot-like joint portion 39 may be formed by ultrasonic embossing or high-frequency embossing in addition to hot embossing. Moreover, the nonwoven fabrics 31 and 32 may be formed by being fixed with an adhesive.

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 with an adhesive, but the tape base material 42 is thermally fused between the nonwoven fabrics 31 and 32. The tape base material 42 may be fixed to the outer surface (the surface not the nonwoven fabric 31 side) of the nonwoven fabric 32 by an adhesive, heat fusion, or the like.
The fixing of the side panel 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. 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 solid guard forming sheet 24 side) side of the back sheet 22. You may join by an adhesive agent, heat sealing | fusion, etc.
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.

(Example)
The disposable diaper of the form shown in FIG. 1 was manufactured. The shape of the side panel, the shape of the joint between the nonwoven fabrics 31 and 32, the fixing mode of the elastic member, and the like are as shown in FIG.
470 dtex thread rubber was used as the elastic member, and the elastic member was fixed between the nonwoven fabrics 31 and 32 using a hot-melt adhesive in a state of being stretched 2.0 times. Ten rubber threads were arranged as shown in the figure, and arranged at intervals of 6 mm in the Y direction.
The hot melt adhesive was applied to each part with a basis weight of 20 g / m ² . In each of the lower second stretchable region F and the upper second stretchable region G, a distal end side joint portion 35, a base end side joint portion 36, and five intermediate joint portions 37 were formed. In each of them, the rubber thread was fixed between the nonwoven fabrics 31 and 32. The distance L1 between the distal end side joint portion 35 and the proximal end side joint portion 36 (value when the elastic member is not contracted) is 50 mm (the contracted state is about 25 mm). The distance between the side bonding part 35 and the intermediate bonding part 37, the distance between the intermediate bonding parts 37, and the distance between the intermediate bonding part 37 and the proximal end side bonding part 36 were all 7 mm. Moreover, the width | variety of the X direction of each intermediate | middle junction part 37 was 1.6 mm. The distance L2 from the base end 3b of the side panel 3 (the outer end of the portion fixed to the absorbent main body 2) to the tip 3a (value in a state in which the side panel 3 is not contracted by the elastic member) was 60 mm.
In the first stretchable region E, the entire surface of the non-woven fabric 31 is coated with an adhesive, and a rubber thread stretched 2.0 times is placed on the non-woven fabric 31. The whole was pressurized and integrated.

(Comparative Example 1)
As a side panel, the configuration of the lower second stretchable region F or the upper second stretchable region G in the embodiment is used except that the side panel (see FIG. 9B) is continuous over the entire length in the Y direction. A disposable diaper was produced in the same manner as in the example.
(Comparative Example 2)
As the side panel, the configuration of the first stretchable region E in the example is disposable in the same manner as in the example except that the side panel (see FIG. 9C) is continuous over the entire length in the Y direction. Made diapers.

  For each of the diapers of Examples and Comparative Examples 1 and 2, positions P1 and P2 shown in FIG. 9D of the side panel are sandwiched between chucks of a Tensilon tensile tester (manufactured by Orientec Co., Ltd.), and a tensile speed of 300 mm. The distance between chucks was increased at / min, and the distance between chucks was extended until the initial length was 45 mm to 70 mm to obtain an SS curve. The results are shown in FIG.

As is apparent from the results shown in FIG. 10, in the side panel of the example, the elongation stress rapidly increases from a relatively low elongation rate as compared with 1. In addition, the side panel of the example has a rapid increase in elongation stress from a relatively low elongation rate as relatively as 2. However, the elongation can be further increased from the elongation rate, and the amount of increase in the elongation stress when further expanded is increased. small.
From this, according to the disposable diaper of the present invention, if the tab of the side panel is fastened at the time when it is felt that the tensile resistance has increased sharply, the side panel has left enough room for further expansion, The tab 4 can be fixed to the landing zone 5, and even if the wearer's waist and legs change during wearing, it becomes difficult to move the wearer's legs and abdomen. It can be seen that it is possible to effectively prevent tightening and leaving marks on the skin (with marks).

  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 30 Stretchable part 31, 32 Non-woven fabric 33 Elastic member 34 Adhesive 35 Front end side joint 36 Base end side joint Part 37 Intermediate joint part 39 Dot joint part 4 Tab 41 Fastening part 42 Tape base material 5 Landing zone H1 Area with tab H2 Area without tab H3 Area without tab E First stretchable area F, F 'Lower part Second stretchable region (second stretchable region)
G, G ′ Upper second stretchable region (second stretchable region)

Claims (4)

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 a stretchable portion in which a plurality of elastic members are stretched between two nonwoven fabrics and are spaced apart from each other, and a tab having a fastening portion is provided at the tip. And
Each of the plurality of elastic members is arranged along the extending direction of the side panel,
A first stretchable region in which the elastic member is continuously fixed between the two nonwoven fabrics along the extending direction in a range having the tabs in the intersecting direction intersecting the extending direction of the side panel. And the elastic member is intermittently fixed between the two non-woven fabrics along the extending direction within a range that does not have the tab in the intersecting direction, or A disposable diaper having a second stretchable region fixed between the two nonwoven fabrics only at both ends.   The disposable diaper according to claim 1, wherein the plurality of elastic members arranged on the side panel are of the same type and arranged at the same elongation rate. The second stretchable region, the junction of the each other two non-woven fabrics are formed by dispersing a plurality of elastic members arranged on the second elasticized region, said at only both end portions of the stretchable portion 2 The disposable diaper according to claim 1 or 2, wherein the disposable diaper is fixed to a piece of non-woven fabric, and at least one elastic member is arranged to pass between the joints formed at different positions in the crossing direction. The disposable diaper according to claim 3 , wherein the joint between the two nonwoven fabrics is formed by heat fusion of the two nonwoven fabrics.