JP2015112414A - Underpants-type absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type absorbent article having a soft exterior body, excellent in deformability of a shape along an article vertical direction, and deformability in a thickness direction, allowing a wearer to easily move, and excellent in touch and feeling of wear.SOLUTION: An underpants-type absorbent article 1 includes an exterior body 2, and an absorbent body fastened to the exterior body. The exterior body 2 includes an expansion/contraction part having an outer layer sheet arranged at a far side from the skin of a wearer, an inner layer sheet arranged at a closer side of the skin of the wearer than the outer layer sheet, and a plurality of elastic members 24 arranged therebetween. In the expansion/contraction part, the outer layer sheet and the inner layer sheet are joined with each other in a junction 26 arranged so as to form a plurality of junction rows 26S along an article vertical direction X, the plurality of elastic members 24 are arranged in an article cross direction Y so as to pass through between the junctions 26 adjacent to each other in the article vertical direction X, and the junctions 26 each comprise a pair of fusion parts u and d arranged in the article vertical direction X so as to be spaced from each other at an interval m.

Description

  The present invention relates to a pants-type absorbent article.

Conventionally, a pants-type disposable diaper comprising an exterior body and an absorbent main body fixed to the exterior body, for the purpose of improving the fit of the diaper to the wearer, etc. 2. Description of the Related Art There are known gathers formed by arranging elastic members in the lateral direction of a diaper at a peripheral portion of a waist opening at a side or below the waist.
A disposable diaper has also been proposed in which such an elastic member for gathering is arranged such that the whole or a part thereof is not fixed to one or both of two sheets sandwiching the elastic member.

  For example, the applicant of the present invention first joins two sheets constituting the exterior body at joints formed in a dotted shape in the vertical and horizontal directions of the diaper, while the two sheets are between In addition, an absorbent article such as a disposable diaper in which an elastic member for gathering is arranged so as not to pass through the joint has been proposed (see Patent Documents 1 and 2).

JP 2008-131968 A JP 2013-116196 A

  By arranging the elastic member for forming the gathers so that the whole or a part thereof is not fixed to the two sheets sandwiching the elastic member, the flexibility and feel of the exterior body can be enhanced. Further, according to the techniques of the cited documents 1 and 2, since the two sheets sandwiching the elastic member by the elastic member contraction form a ridge having excellent flexibility, the flexibility and feel of the exterior body can be improved. In addition, the anti-sag property can be improved.

  However, the performance required for commodities such as disposable diapers is increasing year by year, and it is desired to provide a pants-type absorbent article with further improved flexibility and comfort.

  Therefore, the present invention relates to a pants-type absorbent article with further improved flexibility and comfort.

  The present invention includes an exterior body and an absorbent main body fixed to the exterior body, and the exterior body includes a ventral side portion disposed on the stomach side of the wearer when worn, and a back of the wearer. A pants-type absorbent article having a back side portion arranged on the side, wherein the pants-type absorbent article has a vertical direction and a horizontal direction, and an exterior in at least one of a ventral side portion and a back side portion The body includes an outer layer sheet disposed on the side farther from the wearer's skin, an inner layer sheet disposed closer to the wearer's skin than the outer layer sheet, and a plurality of elastic members disposed therebetween. In the elastic part, the outer layer sheet and the inner layer sheet are joined at a joint part arranged so that a plurality of joint part rows along the article longitudinal direction are formed. Each of the elastic members of the book is between the joints adjacent to each other in the longitudinal direction of the article. The pants-type absorbent article is provided with a plurality of fusion parts arranged in the article transverse direction and each of the joints being arranged in the article longitudinal direction with a gap therebetween. .

  The pant-type absorbent article of the present invention has a flexible exterior body, excellent deformability in the shape along the longitudinal direction of the article and deformability in the thickness direction, is easy for the wearer to move, and is excellent in touch, and is comfortable to wear. .

FIG. 1 is a perspective view showing a usage state (wearing state) of a pants-type disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed plan view of the diaper shown in FIG. 1 expanded and stretched from the skin contact surface side. FIG. 3 is an enlarged plan view showing, in an enlarged manner, a joint portion row of the diaper shown in FIG. 1 and joint portions constituting the joint portion row. FIG. 4 is an explanatory diagram of the length of the joint in the article longitudinal direction and article transverse direction. FIG. 5 is an enlarged cross-sectional view showing a cross section along the article lateral direction of the waist stretchable part in the diaper shown in FIG. 1. FIG. 6 is an enlarged cross-sectional view showing a cross section of the waistline lower stretchable part in the diaper shown in FIG. 1 along the article lateral direction.

Below, the underpants type absorbent article of this invention is demonstrated, referring drawings based on the preferable embodiment.
A pants-type disposable diaper 1 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a pants-type disposable diaper 1 according to this embodiment includes an exterior body 2 and an absorbent main body 3 fixed to the exterior body 2. Moreover, the exterior body 2 has the abdominal side part A distribute | arranged to a wearer's belly side, and the back | dorsal part B distribute | arranged to a wearer's dorsal side at the time of wear, A pair of side seal portions 4 and 4 are formed by joining both ends in the article lateral direction Y and both ends in the article lateral direction Y on the back side B. Moreover, the waist opening part 5 and a pair of leg opening part 6 are formed by this joining. The diaper 1 has the crotch part C distribute | arranged between a wearer's crotch between the abdominal side part A and the back side part.

As shown in FIG. 2, the exterior body 2 in the diaper 1 of the present embodiment is divided into a ventral sheet member 2 </ b> A that forms the ventral part A and a back sheet member 2 </ b> B that forms the dorsal part B. In the pair of side seal portions 4, 4, the ventral seat member 2A and the back seat member 2B are joined. The absorptive main body 3 is fixed so as to be bridged between the ventral sheet member 2A and the dorsal sheet member 2B. In the absorbent main body 3, the overlapping portions of the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B are joined to both the sheet members 2 </ b> A and 2 </ b> B entirely or partially by a known joining means such as an adhesive. ing.
The abdominal side A and the back side B of the exterior body 2 are thin pieces that are not joined between the abdominal side A and the back side B at both ends in the article lateral direction Y of the abdominal or back side sheet member. It may have a width region, for example, a region of 10 mm or less, and this is also included in the case where the abdominal side A and the back side B are joined at both ends in the article lateral direction Y.

As shown in FIG. 2, the diaper 1 of the present embodiment is formed symmetrically with respect to the article longitudinal center line CL extending in the article longitudinal direction X. Therefore, in the following description, the right and left symmetrical portions are mainly described on the right side in FIG. 2, but the left side also has the same configuration except that it is bilaterally symmetrical with the right side.
In addition, the article longitudinal direction X is a direction from a portion disposed on the wearer's stomach side to a portion disposed on the back side through a portion disposed between the crotch, and is generally a longitudinal direction of the absorbent main body 3. Match. On the other hand, the article lateral direction Y is a direction orthogonal to the article longitudinal direction X in a state where the diaper is unfolded and stretched as shown in FIG. 2, and as shown in FIG. The cylindrical waistline portion D formed by connecting the back side portion B coincides with the circumferential direction. In addition, since the article longitudinal direction X is the vertical direction when worn on the abdominal side A and the back side B, the waist opening 5 side is on the upper side or the upper side on the abdomen side A and the back side B. The part C side is also referred to as a lower side or a lower side.

  In the diaper 1 of the present embodiment, the abdominal sheet member 2A and the back sheet member 2B constituting the exterior body 2 are respectively an outer layer sheet 22 that forms the outer surface of the diaper and an outer layer sheet 22 as shown in FIG. An inner layer sheet 23 disposed on the inner surface side and a plurality of thread-like elastic members 24 disposed in an extended state between the two sheets 22, 23 are provided, respectively, a waist stretchable part G1 and a waistline lower stretchable part G2. have. In the diaper 1 of the present embodiment, the outer layer sheet 22 that forms the outer surface of the diaper is an outer layer sheet disposed on the side far from the wearer's skin, and the inner layer sheet 23 is worn in the exterior body 2 more than the outer layer sheet. It is an inner layer sheet arranged on the side close to the person's skin.

  The waist stretchable part G <b> 1 is formed on the outer side of both ends 3 a and 3 b in the longitudinal direction of the absorbent main body 3 in the longitudinal direction X of the diaper 1. The lower waist extension part G2 is formed below the waist extension part G1 and above the lower end of the side seal part 4 in each of the abdominal sheet member 2A and the back sheet member 2B. In the waist stretchable part G1 and the waistline lower stretchable part G2, the outer layer sheet 22 and the inner layer sheet 23 are joined at a large number of joints 26 formed in a dotted pattern.

More specifically, as shown in FIG. 2, a joint portion 26 in which the outer layer sheet 22 and the inner layer sheet 23 are fused to the waist stretchable part G1 of each of the abdominal sheet member 2A and the back sheet member 2B, It is formed intermittently so as to form a line along the article longitudinal direction X, and a plurality of joined part rows 26S composed of the joined parts 26 are formed at intervals in the article lateral direction Y.
Also, the joint portions 26 where the outer layer sheet 22 and the inner layer sheet 23 are fused are arranged in a line along the article longitudinal direction X in the waistline lower stretchable part G2 in each of the abdominal sheet member 2A and the back sheet member 2B. As formed, a plurality of rows of joint portions 26 </ b> P including a plurality of joint portions 26 are formed at intervals in the article lateral direction Y.
In the article side areas S and S in the abdominal sheet member 2A and the back sheet member 2B, the joint part row 26S of the waist stretchable part G1 and the joint part row 26P of the waistline lower stretchable part G2 are provided in the longitudinal direction of the article. A continuous row in the direction X is formed. The article side areas S and S are areas located outside the article lateral direction Y from the positions of the side edges 3c and 3c of the absorbent main body 3.

In the waist stretchable part G1 of the diaper 1 of the present embodiment, the positions of the joints 26 in the article longitudinal direction X are substantially the same for all joint rows 26S. The plurality of elastic members 24 are arranged so as to extend in the article lateral direction Y through the gaps between the joint portions of the joint row 26S. The plurality of elastic members 24 are all disposed between the outer layer sheet 22 and the inner layer sheet 23.
Similarly, in the waistline lower stretchable parts G2 and G2, the positions of the joints 26 in the article longitudinal direction X are substantially the same for all the joint rows 26P. The plurality of elastic members 24 extend in the article lateral direction Y through the gaps between the joint portions of the plurality of joint portion rows 26P. The plurality of elastic members 24 are all arranged between the outer layer sheet 22 and the inner layer sheet 23.

In the diaper 1 of the present embodiment, as shown in FIG. 2, the abdominal sheet member 2A and the back sheet member 2B are both outer layer sheets 22 and inner layer sheets 23 on both sides of the article longitudinal center line CL. Between the outer layer sheet 22 and the inner layer sheet 23, in the vicinity of the position of the side edge 3 c of the absorbent main body 3. Has a main-body-side fixing region 28 bonded through an adhesive.
A plurality of elastic members 24 are arranged between the pair of outer fixing regions 27 in the waist stretchable part G1, and these elastic members 24 are arranged between the sheets 22 and 23 in the pair of outer fixing regions 27, respectively. On the other hand, between the outer fixed regions 27, it is not fixed to any of the sheets 22 and 23.
On the other hand, a plurality of elastic members 24 are arranged between the outer fixed region 27 and the main body side fixed region 28 in the waistline lower stretchable part G2, and these elastic members 24 are arranged in the outer fixed region 27. Between the outer fixed region 27 and the main body side fixing region 28, and is not fixed to any of the sheets 22 and 23.

  As shown in FIG. 2, the main body side fixing region 28 may be formed so as to overlap the absorbent main body 3 as a whole, but is formed so as to extend inside and outside the side edge 3 c of the absorbent main body 3. May be. Moreover, the main body side fixing region 28 may be formed outward in the diaper lateral direction from the side edge 3 c of the absorbent main body 3. In addition, in the aspect in which the entire body-side fixing region 28 is overlapped with the absorbent main body 3, the position of the end of the main body-side fixing region 28 on the lateral side of the diaper and the position of the side edge 3 c of the absorbent main body 3 are determined. Both the matching aspect and the aspect in which the main body side fixing region 28 is formed with a predetermined interval between the side edge 3c of the absorbent main body 3 are included.

  In the waist stretchable part G1, a plurality of joint rows 26S are formed at substantially equal intervals in the article lateral direction X. More specifically, a large number are arranged at substantially equal intervals from the vicinity of one outer fixed region 27 to the vicinity of the other outer fixed region 27. The waistline lower stretchable part G2 is also formed with a plurality of rows at substantially equal intervals from the vicinity of one outer fixing region 27 to the vicinity of the other outer fixing region 27. Between the fixed regions 28, the elastic member 24 is not disposed, or the elastic member 24 is disposed in a state in which a process for preventing elastic elasticity such as cutting is performed.

The joint part row 26S of the waist elastic part G1 and the joint part line 26P of the waistline lower elastic part G2 will be described.
As shown in FIG. 3, each of the joint portions 26 constituting the joint row 26S, 26P is composed of a pair of fusion portions u, d arranged in the article longitudinal direction X with a gap m therebetween. The joint portion 26 has a shape in which the plan view shape (the entire shape including the gap m) is long in the article longitudinal direction X. The joint portion 26 has a length L1 in the article longitudinal direction X of the article width direction Y from the viewpoint of forming a ridge that intersects the elastic member 24 and extends in the article longitudinal direction and improving the flexibility of the exterior body in the longitudinal direction. The length L2 is preferably 2 times or more, more preferably 7 times or more, and preferably 10 times or less, more preferably 9 times or less. As shown in FIG. 4, the length L1 is a length along the article longitudinal direction X between the uppermost part and the lowermost part in the joint 26, and the length L2 is a joint. It is the length along the article width direction Y between one end of the article width direction Y in the portion 26 and the other end.

  Moreover, it is preferable that each fused part u and d which comprise the junction part 26 also has a shape long in the articles | goods longitudinal direction X, respectively. Each of the fused portions u and d has a length L3 in the article longitudinal direction X and a length L4 in the article width direction Y due to the formability of the wrinkles that intersect with the elastic member 24 and continuously extend in the article longitudinal direction. The ratio is preferably 1 or more, more preferably 2 or more, and preferably 4 or less, more preferably 5 or less.

  Further, in the article longitudinal direction X, the length L5 of the gap m of the joint portion 26 (see FIG. 5, the distance between the fused portions) is the distance L6 between the joint portions 26 and 26 adjacent to each other in the article longitudinal direction X. It is preferable that it is less than. By setting the length L5 of the gap m to be less than the distance L6, the flexibility of the heel due to the elastic member 24 not being firmly fixed between the joints 26 and 26, and the elastic member 24 between the joint rows. It is easy to achieve coexistence with the formation of a ridge that intersects with and extends continuously in the longitudinal direction of the article. From the same viewpoint, the ratio of the length L5 to the distance L6 is preferably 40% or less, more preferably 35% or less, and preferably 25% or more, more preferably 30% or more. From the viewpoint of improving the flexibility of the outer package 2, the length L5 of the gap m of the joint portion 26 is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 3.0 mm or less, more preferably. Is 2.0 mm or less.

  In addition, from the viewpoint of forming a ridge that crosses the elastic member 24 and continuously extends in the longitudinal direction of the article and improves the flexibility of the exterior body in the longitudinal direction, a plurality of fusion portions u and d between adjacent elastic members are formed. The total length (L3 + L3) in the article longitudinal direction X is preferably 90% or less, more preferably 80, of the distance L1 between the ends in the article longitudinal direction X of the plurality of fusion portions u and d between adjacent elastic members. % Or less, preferably 50% or more, more preferably 60% or more, and preferably 50% or more and 90% or less, more preferably 60% or more and 80% or less.

Further, in each of the pair of fusion parts u and d of the joint part 26, the constituent resin (such as the heat-fusible component of the constituent fibers) of the sheet material constituting the outer layer sheet 22 and / or the inner layer sheet 23 is melted and solidified. Thus, the two sheets 22 and 23 are connected. On the other hand, in the gap m between the fused portions u and d, the sheets 22 and 23 are not fused, or are fused weaker than the fused portions u and d. In the gap m, the bending rigidity when the exterior body 2 is folded along the folding line extending along the article lateral direction Y is smaller than that of the fused portions u and d. Accordingly, the exterior body 2 is easily bent in the article longitudinal direction X between the joint portions 26 and in the gap m between the fusion portions u and d.
The joint portion 26 is formed by stacking the outer layer sheet 22 and the inner layer sheet 23 and subjecting the portion to hot embossing. As a heat embossing device, an embossing roll and an anvil roll are provided, and an embossing roll having a convex portion having a shape corresponding to the fused portions u and d of the joining portion 26 can be used.

  Further, the side seal portion 4 described above is formed by stacking the body side fixing region 28 on the abdominal side A side and the body side fixing region 28 on the back side B side after forming the joining portion 26, and heat embossing on that portion. It is formed by processing. As a process for forming the joint portion 26, an ultrasonic seal, a laser, or the like can be adopted instead of the heat embossing process, and as a process for forming the side seal part 4, an ultrasonic wave can be used instead of the heat embossing process. Seals, lasers, adhesives and the like can also be employed.

  The absorptive main body 3 has a liquid-permeable top sheet 31, a liquid-impermeable back sheet 32, and an absorber 33 disposed therebetween. The poor liquid permeability includes liquid impermeability and poor liquid permeability. A pair of three-dimensional guard forming sheets 34, 34 are disposed on both sides of the absorbent main body 3. The three-dimensional guard forming sheet 34 has an elastic member 35 for forming a three-dimensional guard in the vicinity of the edge near the longitudinal center line CL of the article, and when the diaper is worn, the edge of the three-dimensional guard forming sheet 34 is caused by the contraction force of the elastic member 35. The three-dimensional guard 34 is formed upright so that a portion having a predetermined width is separated from the top sheet 31.

In the waist expansion / contraction part G1 of the diaper 1 of this embodiment, as shown in FIG. 5, the elastic member 24 arranged in an expanded state between the outer layer sheet 22 and the inner layer sheet 23 contracts, so that the adjacent joints The sheet 22 and the sheet 23 between the sub-rows 26S are deformed so as to swell outward, and a flange 29 composed of the sheet 22 or the sheets 23 and 22R is generated between the adjacent joint-line 26S, and between the two sheets 22 and 23. A hollow portion 30 surrounded by the flange 29 and the flange 29 is formed.
In the diaper 1 of the present embodiment, the sheet material constituting the outer layer sheet 22 in each of the ventral side portion A and the back side portion B is brought into contact with the skin of the inner layer sheet 23 along the peripheral edge portion 51 of the waist opening 5. The folded portion 22R covers the skin contacting surface side of the inner layer sheet 23 in the waist stretchable part G1 (see FIG. 5). Further, the folded portion 22R is joined to the skin contact surface of the inner layer sheet 23 and / or the absorbent main body 3 by an adhesive which is applied entirely or partially, while being fused to the joint portion 26. It has not been.

  As shown in FIG. 6, in the waistline lower stretchable part G <b> 2, the elastic member 24 disposed in an expanded state between the outer layer sheet 22 and the inner layer sheet 23 contracts, so that the sheet between adjacent joint part rows 26 </ b> P. 22 and the sheet 23 are deformed so as to bulge outward, and a ridge 29 composed of the sheet 22 or the sheet 23 is generated between the adjacent joint row 26S, and between the two sheets 22 and 23, the ridge 29 and the ridge 29 A hollow portion 30 surrounded by the periphery is formed.

Further, the elastic member 24 is disposed between the joint portions 26 adjacent to each other in the longitudinal direction of the article in the waist stretchable portion G1 and / or the waistline lower stretchable portion G2 of the present diaper 1. Since it is not fixed, the collar 29 formed by the sheet 22 or the sheet 23 is deformed flexibly with respect to the load applied to the exterior body 2 in the thickness direction.
Moreover, the exterior body 2 bends flexibly not only between the joint portions 26 in the article longitudinal direction X but also in the gap m between the fusion portions u and d in the individual joint portions 26. Therefore, the shape of the exterior body 2 in the article longitudinal direction X changes flexibly so as to follow the shape of the wearer's abdomen, and also follows the change when the shape of the abdomen changes due to the movement of the wearer, etc. And change flexibly.
The diaper 1 of this embodiment has such a configuration, the exterior body 2 is flexible, has excellent deformability in the shape along the longitudinal direction of the article and deformability in the thickness direction, and the wearer can easily move. It feels good and is comfortable to wear.
Moreover, the recessed part between the ridges 29 and 29 formed in the outer surface or inner surface side of the diaper 1 works as an air passage, so that moisture in the diaper 1 is easily released to the outside, and is not easily stuffy. Such a heel 29 is preferably formed in the waist stretchable part G1 and / or the waistline lower stretchable part G2 at least in a natural state, and a space formed between the heel 29 and the heel 29 even when the article is worn. Is preferably maintained.

  Each joint portion 26, as in the diaper 1 of the present embodiment, is composed of a pair of fused portions u and m. From the viewpoint of improving the flexibility in the vertical direction.

  The material for forming each part of the diaper 1 will be described. The top sheet 31, the back sheet 32, the absorber 33, the three-dimensional guard forming sheet 34, and the like are the same as those conventionally used for this type of absorbent article. Can be used without particular limitation. For example, as the top sheet 31, a liquid-permeable nonwoven fabric, a perforated film, or a laminate thereof can be used, and as the back sheet 32, a resin film or a laminate of the resin film and the nonwoven fabric is used. Can do. As the absorbent body 33, an absorbent core made of a fiber aggregate of fiber materials such as pulp or an absorbent core carrying a superabsorbent polymer thereon is used as a core wrap sheet made of tissue paper or a water-permeable nonwoven fabric. What is wrapped can be used. As the three-dimensional guard forming sheet 34, a stretchable film, a water-repellent nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

As the sheet material constituting the outer layer sheet 22 and the inner layer sheet 23, various sheet materials conventionally used for this type of article can be used without particular limitation, but is preferably a non-woven fabric, particularly flexible and the like. From this point of view, it is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient. In addition, the exterior sheet | seat which consists of a nonwoven fabric, a film, etc. can also be distribute | arranged also to the non-skin contact surface side of the back surface sheet 32 in the crotch part C.
As a material for forming the elastic members 24 and 35, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the material for forming the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, the exterior body may not be divided into the ventral sheet member 2A and the dorsal sheet member 2B. For example, the outer package may be composed of a single sheet in which the outer layer sheet 22 and the inner layer sheet 23 are continuous across the abdominal part A, the crotch part C, and the back side part B, or the outer layer sheet. 22 is composed of a single sheet continuous over the abdominal side A, the crotch C and the back side B, while the inner layer sheet 23 is disposed only on either the abdominal side A or the back side B. It may be what is being done.
The waistline lower stretchable part G2 may be one that continuously stretches from one side region S to the other side region S. Moreover, the underpants type absorbent article of the present invention may have only one of the waist elastic part G1 and the waistline lower elastic part G2. Moreover, the underpants type absorbent article of this invention is replaced with what has the waist elastic part G1 and the waist part lower elastic part G2 in both the abdominal side part A and the back side part B, and the abdominal side part A and the back side part. Only one of B may have one or both of the waist stretchable part G1 and the waistline lower stretchable part G2.

Moreover, even if the exterior body 2 in the ventral portion A or the back portion B is the diaper 1 described above, only the sheet material constituting the outer layer sheet is folded at the peripheral edge of the waist opening. Although the sheet material constituting the outer layer sheet and the sheet material constituting the inner layer sheet may be folded together, neither the outer layer sheet nor the inner layer sheet may have a folded portion. . In addition, the folded portion of the outer layer sheet or the inner layer sheet may be bonded to the facing surface in a manner different from that of the diaper 1 described above, for example, it may be bonded to the facing surface over the entire region. You can also.
In addition, the number of fusion parts constituting each joint part, in other words, the number of fusion parts arranged in the longitudinal direction of the article between adjacent elastic members is 3 or more instead of two. You can also.

The pants-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

Regarding the embodiment (aspect) of the present invention described above, the following additional notes (pants-type wearing articles) are disclosed.
<1>
An exterior body, and an absorbent main body fixed to the exterior body,
The exterior body is a pants-type absorbent article having a belly side portion disposed on the wearer's belly side and a back side portion disposed on the wearer's back side when worn,
The pant-type absorbent article has a vertical direction and a horizontal direction,
The exterior body in at least one of the ventral part and the dorsal part is an outer layer sheet disposed on the side far from the wearer's skin, and an inner layer sheet disposed on the side closer to the wearer's skin than the outer layer sheet, It has a stretchable part having a plurality of elastic members arranged therebetween,
In the expansion / contraction part, the outer layer sheet and the inner layer sheet are joined at a joining part arranged so that a plurality of joining part rows along the article longitudinal direction are formed, and a plurality of the elastic members are provided. , Respectively, are arranged in the article lateral direction through the joints adjacent in the article longitudinal direction,
A pants-type absorbent article, wherein each of the joint parts is composed of a plurality of fusion parts arranged in the longitudinal direction of the article with a gap between them.

<2>
The pants-type absorbent article according to <1>, wherein each of the joint parts includes a pair of fusion parts arranged in the longitudinal direction of the article with a gap therebetween.
<3>
The pants-type absorbent article according to <1> or <2>, wherein a length L5 of the gap of the joint in the article longitudinal direction is less than a distance L6 between joints adjacent in the article longitudinal direction. .
<4>
The ratio of the length L5 to the distance L6 is preferably 40% or less, more preferably 35% or less, and preferably 25% or more, more preferably 30% or more, according to <3>. Pants-type absorbent article.
<5>
The length L5 of the gap of the joint is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 3.0 mm or less, more preferably 2.0 mm or less, <1> The underpants type absorbent article according to any one of ~ <4>.
<5>
The total length in the article longitudinal direction of the plurality of fused portions between adjacent elastic members is preferably 90% or less of the distance between the longitudinal ends of the plurality of fused portions between adjacent elastic members. , More preferably 80% or less, preferably 50% or more, more preferably 60% or more, and preferably 50% or more and 90% or less, more preferably 60% or more and 80% or less. The underpants-type absorbent article according to any one of 1> to <4>.
<6>
The exterior body has an abdominal side portion disposed on the abdomen side of the wearer and a back side portion disposed on the back side of the wearer when worn, and both lateral ends of the article in the abdomen side portion. Any one of the above <1> to <5>, in which the article and the both ends of the article in the back side are joined to form a pair of side seals, a waist opening 5 and a pair of leg openings. A pants-type absorbent article according to claim 1.
<7>
In the joint portion, the length L1 in the article longitudinal direction X is preferably 2 times or more, more preferably 7 times or more, and preferably 10 times or less, more preferably, the length L2 in the article width direction Y. The underpants-type absorbent article according to any one of the above items <1> to <6>, which is 9 times or less.
<8>
The pants-type absorbent article according to any one of <1> to <7>, wherein the individual fusion-bonding parts constituting the joint part also have a shape that is long in the article longitudinal direction X.
<9>
In the fused portion, the length L3 in the article longitudinal direction X is preferably 1 time or more, more preferably 2 times or more, and preferably 4 times or less, more preferably 4 times or less the length L4 in the article width direction Y. The pants-type absorbent article according to any one of <1> to <8>, wherein is 5 times or less.
<10>
In each of the fusion parts u and d constituting the joint part, the constituent resin (such as the heat-fusible component of the constituent fibers) of the sheet material constituting the outer layer sheet 22 and / or the inner layer sheet 23 is melted and solidified. The pants-type absorbent article according to any one of <1> to <9>, wherein the sheets 22 and 23 are bonded to each other.

<11>
The pants-type absorbent article according to any one of <1> to <10>, wherein the joint portion includes a pair of fusion parts u and d arranged in the longitudinal direction of the article.
<12>
The underpants-type absorbent article according to any one of <1> to <11>, wherein the sheet material constituting the outer layer sheet 22 and the inner layer sheet 23 is a nonwoven fabric.
<13>
The pants-type absorbent article according to any one of <1> to <12>, wherein the elastic member is a thread-like elastic member.
<14>
The pants-type absorbent article according to any one of <1> to <13>, wherein the exterior body is divided into an abdominal sheet member and a back sheet member.
<15>
Each of the outer layer sheet and the inner layer sheet is made up of a single sheet that extends over the abdominal part A, the crotch part C, and the dorsal part B, according to <1> to <13>. The underpants type absorbent article according to any one of the above.
<16>
The outer layer sheet is composed of a single sheet continuous across the ventral side A, the crotch C, and the back side B, while the inner layer sheet is only one of the ventral side A and the back side B. The underpants-type absorbent article according to any one of <1> to <15>, which is arranged in
<17>
The exterior body in the ventral part A or the back part B is any one of the above <1> to <16>, in which only the sheet material constituting the outer layer sheet is folded at the peripheral edge of the waist opening. Pants-type absorbent article.
<18>
Any one of the above items <1> to <16>, in which the exterior body in the ventral portion A or the back portion B is formed by integrally folding a sheet material constituting the outer layer sheet and a sheet material constituting the inner layer sheet. The underpants-type absorbent article according to 1.
<19>
The exterior body in the ventral part A or the dorsal part B is a pants-type absorbent as set forth in any one of the above items <1> to <16>, wherein neither the outer layer sheet nor the inner layer sheet has a folded portion. Goods.
<20>
The pants-type absorbent article according to any one of <1> to <19>, wherein the pants-type absorbent article is a pants-type disposable diaper for infants or adults.
<21>
The pant-type absorbent article according to any one of <1> to <19>, wherein the pant-type absorbent article is a pant-type sanitary napkin.

1 Pants-type disposable diapers (pants-type absorbent articles)
DESCRIPTION OF SYMBOLS 2 Exterior body 2A Abdominal side sheet member 2B Back side sheet member 22 Outer layer sheet 23 Inner layer sheet 22R Folding part 24 Elastic member 26 Joint part 26S Joint part row | line 26P Joint part row | line | column 27 Outer fixed area 28 Main body side fixed area | region 29 ３０ 30 Hollow part DESCRIPTION OF SYMBOLS 3 Absorbent main body 31 Top sheet 32 Back sheet 33 Absorber 34 Solid guard 35 Elastic member 4 Side seal part 5 Waist opening part 51 Peripheral part 6 Leg opening part A Abdominal side part B Back side part C Crotch part D Girth part G1 West Elastic part G2 Lower waist elastic part

Claims (4)

An exterior body, and an absorbent main body fixed to the exterior body,
The exterior body is a pants-type absorbent article having a belly side portion disposed on the wearer's belly side and a back side portion disposed on the wearer's back side when worn,
The pant-type absorbent article has a vertical direction and a horizontal direction,
The exterior body in at least one of the ventral part and the dorsal part is an outer layer sheet disposed on the side far from the wearer's skin, and an inner layer sheet disposed on the side closer to the wearer's skin than the outer layer sheet, It has a stretchable part having a plurality of elastic members arranged therebetween,
In the expansion / contraction part, the outer layer sheet and the inner layer sheet are joined at a joining part arranged so that a plurality of joining part rows along the article longitudinal direction are formed, and a plurality of the elastic members are provided. , Respectively, are arranged in the article lateral direction through the joints adjacent in the article longitudinal direction,
A pants-type absorbent article, wherein each of the joint parts is composed of a plurality of fusion parts arranged in the longitudinal direction of the article with a gap between them.   2. The pant-type absorbent article according to claim 1, wherein each of the joint parts includes a pair of fusion parts arranged in the longitudinal direction of the article with a gap therebetween.   The underpants type absorbent article according to claim 1 or 2, wherein in the article longitudinal direction, the length of the gap of the joint is less than the distance between joints adjacent in the article longitudinal direction.   The total length in the article longitudinal direction of the plurality of fusion parts between adjacent elastic members is 90% or less of the distance between the end parts in the article longitudinal direction of the plurality of fusion parts between adjacent elastic members. The underpants type absorbent article according to any one of claims 1 to 3.

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