JP6453051B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article such as a pants-type disposable diaper.

  Conventionally, as a pants-type disposable diaper, an absorbent main body having a liquid-retaining absorbent body and an exterior body disposed on the non-skin-facing surface side of the absorbent main body are provided in the front-rear direction of the wearer. The front body and the back body positioned on the back side of the wearer when worn in the longitudinal direction, and the front body and the back body. In general, a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges along the longitudinal direction of the exterior body in each of the back bodies. For example, in Patent Documents 1 to 4, in the pants-type disposable diaper having such a configuration, leg elastic members for forming leg gathers are formed in the opening edge portions of the pair of leg openings toward the inside in the vertical direction in a plan view. What is arranged so as to form a convex shape is described. In the pants-type disposable diapers described in Patent Documents 1 to 4, the leg elastic member disposed on the front body and the leg elastic member disposed on the back body are spaced apart from each other in the vertical direction. Patent Documents 2 and 4 describe that an absorbent body constituting the absorbent main body is one having a high rigidity region and a low rigidity region in the vertical direction.

JP 2004-65524 A Special table 2008-534230 gazette JP2013-13524A JP 2013-153846 A

  When wearing a pant-type absorbent article, the absorbent article is usually pulled up to the wearer's crotch side with both legs of the wearer inserted into the pair of leg openings. Conventional pants-type absorbent articles such as those described in Patent Documents 1 to 4 are mainly pulled up only on the back side of the absorbent main body in such mounting operation, and the entire absorbent main body is not pulled up evenly. There was a problem that the feeling of wearing was bad. In addition, the conventional pant-type absorbent article has a problem that it is difficult to wear since the absorbent main body (absorber) contracts and deforms in the vertical direction during the wearing operation.

  Therefore, this invention relates to the underpants type absorbent article which is easy to wear and excellent in a feeling of wear.

The present invention has an absorptive main body having a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto, and having a liquid-retaining absorbent, and the non-skin facing side of the absorptive main body And a pair of side seal portions and a waist opening by joining both side edges along the longitudinal direction of the exterior body in each of the front body and the back body. A pants-type absorbent article in which a part and a pair of leg openings are formed,
The exterior body has lateral stretchability in the waist portions of the front body and the back body, and the exterior body is a leg elastic member that forms a leg gather at the opening edge of each of the pair of leg openings. The front leg elastic member disposed in the stretched state on the front body, and the rear leg elastic member disposed in the stretched state on the back body,
The front leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waist part in the front body. Has reached the side edge along the longitudinal direction of the body,
The rear leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waistline portion in the back body. It has reached the side edge along the longitudinal direction of the absorber,
The front leg elastic member and the rear leg elastic member are spaced apart from each other in the longitudinal direction to form a separation region;
The absorbent main body is joined to the exterior body at a portion where both side edge portions along the longitudinal direction of the absorber and the front leg elastic member and the rear leg elastic member overlap in plan view.
The absorber has a high-rigidity region having a relatively high bending rigidity and a low-rigidity region having a bending rigidity lower than that of the high-rigidity region, and the high-rigidity region is located at a central portion in the lateral direction, And the pants type absorbent article which continues over the full length of the vertical direction of the said separation | spacing area | region is provided.

  According to the present invention, a pant-type absorbent article that is easy to wear and excellent in wearing feeling is provided.

FIG. 1 is a perspective view schematically showing a pants-type disposable diaper which is an embodiment of a pants-type absorbent article of the present invention. FIG. 2 is a developed plan view schematically showing the skin facing surface side (inner surface side) in the developed and extended state of the diaper shown in FIG. FIG. 3 is a developed plan view schematically showing the non-skin facing surface side (outer surface side) in the developed and extended state of the diaper shown in FIG. 1. FIG. 4 is a vertical cross-sectional view schematically showing a cross section taken along line II of FIGS. 2 and 3. FIG. 5 is an exploded perspective view schematically showing the diaper shown in FIG. 1 in an exploded manner. FIG. 6 is a partially broken perspective view schematically showing an example of a part of the stretchable outer layer sheet (abdominal side outer layer sheet) constituting the outer package of the diaper shown in FIG. 1.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The pants type disposable diaper 1 which is one Embodiment of the pants type absorbent article of this invention is described by FIGS. The diaper 1 has a longitudinal direction X corresponding to the wearer's front-rear direction and a transverse direction Y perpendicular thereto, and is disposed on the non-skin facing surface side of the absorbent main body 2 and the absorbent main body 2. An outer body 3 that fixes the absorbent main body 2, and both side edges FS and RS along the longitudinal direction X of the outer body 3 in the front body F and the rear body R are joined together to form a pair of sides Seal portions S, S, a waist opening WH through which the wearer's torso is passed, and a pair of leg openings LH, LH through which the lower leg of the wearer is passed are formed.

  As shown in FIG.2 and FIG.3, the front body F is a part which covers the front side (abdominal side) of a wearer's body at the time of wear on the basis of the vertical centerline Lx which bisects the diaper 1 to the vertical direction X, The back body R is a portion that covers the back side (back side) of the wearer's body. Moreover, in this specification, a skin opposing surface is a surface (side near a wearer's skin) which is turned to a wearer's skin side in the wearing state in the diaper 1 and its structural member (for example, absorptive main body 2), The non-skin facing surface is a surface (a side farther from the skin than the skin facing surface) directed toward the side opposite to the wearer's skin side in the wearing state in the diaper 1 and its constituent members.

  The diaper 1 includes an abdominal side portion 1A disposed on the abdomen side of the wearer in a worn state, a back side portion 1C disposed on the back side, and a crotch portion positioned between them and disposed on the crotch portion of the wearer. 1B. The longitudinal direction X of the diaper 1 is a direction extending between the front body F and the back body R, that is, a direction extending between the abdominal side 1A and the back side 1C via the crotch 1B, and absorbs It coincides with the longitudinal direction of the main body 2. The abdominal side 1A is a part of the front body F, the back side 1C is a part of the back body R, and the crotch 1B extends over the front body F and the back body R. The abdominal side portion 1A and the back side portion 1C are portions that are in the same position as the side seal portion S in the longitudinal direction X, and are waist portions that are arranged around the wearer's waist when the diaper 1 is worn. The crotch part 1 </ b> B is a region in which concave openings (leg edges LS, LS) for forming leg openings LH, LH are formed at both side edges along the longitudinal direction X of the exterior body 3. The crotch part 1B has an excretion part facing part that is disposed to face the excretion part of the wearer when the diaper 1 is worn, and the excretion part facing part is usually a central part (vertical center) of the diaper 1 in the longitudinal direction X. (On line Lx) or in the vicinity thereof.

  The absorbent main body 2 has a rectangular shape in plan view as shown by the outlines in FIGS. 2 and 3, and its longitudinal direction is made to coincide with the vertical direction X of the diaper 1 in the expanded and extended state. It arrange | positions in the center part of the horizontal direction Y of the body 3, and is joined to the exterior body 3 with the adhesive agent. The outer package 3 forms the outer shape of the diaper 1 in the unfolded and extended state of the diaper 1 as shown in FIGS. 2 and 3, and the periphery of the outer package 3 forms the outline of the diaper 1 in that state. . The “expanded and extended state” of the diaper 1 means that the diaper 1 is separated by the side seal portion S to be in the expanded state, and the expanded diaper 1 is stretched by the elastic member of each part to design dimensions (the influence of the elastic member is not at all). It means a state in which it is expanded until it becomes the same size as when it is expanded in a flat state in the excluded state.

  As shown in FIG. 4, the absorbent main body 2 includes a liquid-permeable surface sheet 21 that forms a skin-facing surface, and a liquid-impermeable or liquid-permeable or water-repellent back sheet 22 that forms a non-skin-facing surface. And a liquid-retaining absorbent 23 (230, 231) interposed between both sheets 21 and 22, and these are integrated by a known joining means such as an adhesive. . The absorber 23 is located in the center part of the horizontal direction Y of the diaper 1 (exterior body 3). As the top sheet 21 and the back sheet 22, various types conventionally used for this type of absorbent article can be used without particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet 21, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 22. As the absorbent body 23, for example, an absorbent core containing at least one kind of water-absorbing polymer particles and fiber materials such as pulp fibers can be used, and the absorbent core has a core wrap such as paper or nonwoven fabric on the surface. It may be covered with a sheet.

  As shown in FIGS. 2 and 5, lateral cuffs made of a liquid-resistant or water-repellent and breathable sheet material are provided on the left and right sides along the longitudinal direction Y of the skin-facing surface of the absorbent main body 2. 24, 24 are provided. In the vicinity of the free end of each side cuff 24, one or more thread-like side cuff elastic members (not shown) are arranged in an extended state. Each side cuff 24 stands up at least at the crotch portion 1B when the side cuff elastic member arranged in an expanded state contracts in the wearing state of the diaper 1, and prevents the liquid from flowing out to the side.

  As shown in FIGS. 2 and 3, the exterior body 3 includes an abdominal side portion 1 </ b> A that is a waistline portion of the front body F, a back side portion 1 </ b> C that is a waistline portion of the back body R, an abdominal side portion 1 </ b> A, and a backside portion. 1C is disposed over the crotch 1B, and both side edges along the longitudinal direction X are curved inwardly in the crotch 1B to form a pair of leg edges LS, LS. 2 and 3, it has an hourglass shape in which the central region in the vertical direction X is bound inward in the horizontal direction Y in plan view. The crotch portion 1B has a narrowest width portion 3N that is a portion of the exterior body 3 that has the shortest length in the lateral direction Y. The exterior body 3 has both side edges FS, FS along the longitudinal direction X in the front body F (abdominal side 1A) and both side edges RS, RS along the longitudinal direction X in the back body R (back side 1C). Are joined together by a known joining means such as an adhesive, heat seal, ultrasonic seal, etc., and as a result of the joining, as shown in FIG. 1, a pair of side seal portions S, S is formed on the diaper 1. A waist opening WH and a pair of leg openings LH, LH are formed.

  As shown in FIGS. 4 and 5, the exterior body 3 is configured to include a laminated body of an outer layer sheet 31 and an inner layer sheet 32. In the wearing state of the diaper 1, the outer layer sheet 31 is located on the side far from the wearer's body to form a non-skin facing surface (outer surface) of the diaper 1, and the inner layer sheet 32 is on the side closer to the wearer's body. Position to form the skin facing surface (inner surface) of the diaper 1. The outer layer sheet 31 and the inner layer sheet 32 are joined by an adhesive at a predetermined site.

  In the present embodiment, as shown in FIGS. 4 and 5, the inner layer sheet 32 is composed of one continuous sheet, whereas the outer layer sheet 31 is composed of a combination of a plurality of sheets. The ventral outer layer sheet 31A constituting the ventral part 1A, the dorsal outer layer sheet 31C constituting the dorsal part 1C, and the crotch outer layer sheet 31B constituting the crotch part 1B located between the sheets 31A and 31C. It is comprised including. Each of the sheets 31A, 31B, 31C constituting the outer layer sheet 31 is overlapped with each other in the longitudinal direction X, and a known joining such as an adhesive, a heat seal, a high frequency seal, an ultrasonic seal, etc. They are joined and integrated by means. In the overlapping portion of the sheets 31A and 31C and the sheet 31B, the sheet 31B located in the center of the longitudinal direction X is located on the side relatively close to the absorbent main body 2, and both ends of the sheet 31B in the longitudinal direction X The non-skin facing surface of the part is covered with sheets 31A and 31C.

  As shown in FIGS. 2, 4, and 5, the ventral outer layer sheet 31 </ b> A includes a ventral extension portion 31 </ b> AE that extends outward from the end in the longitudinal direction X on the ventral portion 1 </ b> A side of the inner layer sheet 32. The back side outer layer sheet 31C has a back side extending part 31CE extending outward from the end in the longitudinal direction X on the back side part 1C side of the inner layer sheet 32. The portions 31AE and 31CE are folded back toward the inner layer sheet 32 so as to cover both ends in the longitudinal direction X of the absorbent main body 2 arranged and fixed on the inner layer sheet 32, and both extending portions 31AE are formed by an adhesive. , 31CE is fixed to other constituent members (the inner layer sheet 32, the absorbent main body 2, the three-dimensional gather 5) facing the diaper 1.

  In the present embodiment, the abdominal side outer layer sheet 31A and the back side outer layer sheet 31C constituting the outer layer sheet 31 have elasticity in the lateral direction Y, whereas the remaining part of the outer layer sheet 31 (inseam outer layer sheet) 31B) and the inner layer sheet 32 are not stretchable and non-stretchable. That is, the abdominal side 1A which is the waist part of the front body F and the back side part 1C which is the waist part of the back body R are both stretchable in the lateral direction Y, and the abdominal side 1A and the back side part The crotch 1B sandwiched between 1C does not have elasticity in the lateral direction Y.

  The ventral outer layer sheet 31 </ b> A and the back outer layer sheet 31 </ b> C have elasticity in at least the lateral direction Y. FIG. 6 shows an example of a stretchable ventral outer layer sheet 31A. The ventral outer layer sheet 31A shown in FIG. 6 has a configuration in which a thread-like elastic filament is bonded to one surface of an extensible fiber layer mainly composed of inelastic fibers, and two fiber sheets 41 as the fiber layers. , 42 and an elastic member 43 as an elastic filament disposed between both sheets 41, 42. The stretchable backside outer layer sheet 31A having such a configuration can be manufactured, for example, according to the method described in JP-A-2009-61743. The stretchable backside outer layer sheet 31C can also be configured in the same manner as the stretchable ventral side outer layer sheet 31A shown in FIG.

  The two sheets 41 and 42 constituting the ventral outer layer sheet 31A are both extensible. The sheets 41 and 42 can extend in the same direction as the direction in which the elastic member 43 extends (lateral direction Y). Stretchable means (a) when the constituent fibers themselves of the sheets 41 and 42 are stretched, and (b) even if the constituent fibers themselves do not stretch, This includes a case in which the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding or the like, or the constituent fibers are broken, and the sheets 41 and 42 are stretched as a whole.

  The elastic member 43 constituting the ventral outer layer sheet 31A is an elastic filament formed by being stretched in a state where the elastic resin is melted or softened. The plurality of elastic members 43 are substantially continuous over the entire length of the sheet 31 </ b> A (the total length in the lateral direction Y of the exterior body 3). The plurality of elastic members 43 are arranged so as to extend in one direction (lateral direction X) without crossing each other. The elastic member 43 is joined to the two sheets 41 and 42 in a substantially non-extended state. In the sheet 31 </ b> A, the elastic member 43 is joined to the sheets 41 and 42 by fusing the elastic members 43 with the fibers (non-elastic fibers) constituting the sheets 41 and 42 embedded in the elastic members 43. However, it is not made using an adhesive such as a hot-melt adhesive. Therefore, there is no adhesive between the sheets 41 and 42 (extensible fiber layer mainly composed of non-elastic fibers) and the elastic member 43 bonded thereto.

  The ventral outer layer sheet 31A can be expanded and contracted in the same direction as the direction in which the elastic member 43 extends (lateral direction Y). The stretchability of the sheet 31 </ b> A appears due to the elasticity of the elastic member 43. When the sheet 31A is stretched in the same direction as the direction in which the elastic member 43 extends, the elastic member 43 and the sheets 41 and 42 expand. When the stretching of the sheet 31A is released, the elastic member 43 contracts, and the sheets 41 and 42 return to the state before the stretching with the contraction. Further, in the sheet 31A, there is no other elastic member coupled in a state orthogonal to the elastic member 43, and therefore the sheet 31A is stretched in the same direction as the direction in which the elastic member 43 extends (lateral direction Y). When this occurs, the sheet 31 </ b> A contracts in the transverse direction Y, and expands with little so-called width contraction.

  Each of the two sheets 41 and 42 constituting the ventral outer layer sheet 31A may be a short fiber nonwoven fabric. Examples of the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric. The sheet 41 and the sheet 42 may be the same type or different types. As used herein, the “same type of sheet” means sheets having the same manufacturing process, types of constituent fibers of the sheet, fiber diameters and lengths of the constituent fibers, sheet thickness, basis weight, and the like. . When at least one of these is different, it is a “heterogeneous sheet”.

  The elastic member 43 (elastic filament) constituting the ventral outer layer sheet 31A is made of, for example, a thermoplastic elastomer or rubber. In particular, when a thermoplastic elastomer is used as a raw material, it is possible to perform melt spinning using an extruder in the same manner as a normal thermoplastic resin, and the elastic filament thus obtained is easily heat-sealed. It is suitable for. Examples of the thermoplastic elastomer include styrene such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). -Based elastomers, olefin-based elastomers (ethylene-based α-olefin elastomers, propylene-based elastomers copolymerized with ethylene, butene, octene, etc.), polyester-based elastomers, polyurethane-based elastomers, and the like. Two or more kinds can be used in combination. Further, core-sheath type or side-by-side type composite fibers made of these resins can also be used.

  Thus, while the ventral outer layer sheet 31A and the back outer layer sheet 31C have stretchability, the crotch outer layer sheet 31B and the inner layer sheet 32 do not have stretchability and are non-stretchable. The non-stretchable sheets 31B and 32 preferably do not have stretchability in the vertical direction X or the horizontal direction Y, and preferably do not have stretchability in both the directions X and Y. In the exterior body 3, the outer layer sheet 31 in which only a part (the abdominal part 1 </ b> A and the back part 1 </ b> C) is stretchable and the inner layer sheet 32 that is not stretchable as a whole are parts having stretchability of the outer layer sheet 31 ( Under the stretched state of the ventral outer layer sheet 31A and the dorsal outer layer sheet 31C), they are bonded to each other on the opposing surfaces. Therefore, the outer package 3 as a whole is provided with the ventral outer layer sheet 31A and the dorsal outer layer sheet 31C. The ventral part A and the back part C (girth part) are stretchable in at least the direction in which the sheets 31A and 31C can be stretched (lateral direction Y), and the other part (the crotch B) is stretchable. Does not have sex.

  The fact that the sheet is not substantially stretchable in a certain direction means that the sheet hardly stretches even when a force for pulling in the certain direction is applied to the sheet. For example, when a sample having a length of 15 × width of 5 cm is pulled in a longitudinal direction by a material tensile tester such as Tensilon and the breaking elongation when the sample breaks is 10% or less, The sample is not substantially stretchable in the longitudinal direction. The elongation at break can be calculated by (the sample length at break−the original length of the sample) / (the original length of the sample) × 100.

  As the non-stretching crotch outer layer sheet 31B and the inner layer sheet 32, nonwoven fabrics produced by various manufacturing methods are preferably used, for example, spunbond nonwoven fabric, air-through nonwoven fabric, needle punched nonwoven fabric, and the like. As a constituent fiber of the nonwoven fabric used as the non-stretchable sheets 31B and 32, for example, a fiber made of polyester such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide, or the like Etc. The fibers constituting the nonwoven fabric used as the non-stretchable sheets 31B and 32 may be short fibers or long fibers, and may be hydrophilic or water repellent. Moreover, a core-sheath type or side-by-side type composite fiber, a split fiber, a modified cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can also be used. These fibers can be used alone or in combination of two or more.

  The exterior body 3 includes a waist elastic member 33 that forms a waist gather at the opening edge of the waist opening WH. That is, one or a plurality of waist elastic members 33 for forming waist gathers (in the present embodiment, a plurality of waist elastic members 33) in the lateral direction of the waist edge WH of the waist opening WH in each of the ventral side A and the back side C. It is arranged in an extended state over the entire length of Y, whereby an annular waist gather that is substantially continuous over the entire circumference is formed in the waist opening WH. The waist elastic member 33 has a thread shape or a belt shape, and is sandwiched and fixed by an adhesive between the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3, as shown in FIG.

  Moreover, the exterior body 3 is a leg elastic member that forms leg gathers at the opening edge of each of the pair of leg openings LH, LH, and is one or a plurality (in this embodiment) arranged in an extended state on the front body F A plurality of front leg elastic members 34 and one or a plurality (in the present embodiment, a plurality) of rear leg elastic members 35 arranged in an extended state on the back body R are provided. Each of the leg elastic members 34 and 35 is thread-like or belt-like, and is sandwiched and fixed by an adhesive between the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 as shown in FIG.

  As shown in FIGS. 2 and 3, the front leg elastic member 34 is formed from each of the side edge portions FS and FS (side seal portions S) of the exterior body 3 constituting the abdominal side portion 1A (the waistline portion) of the front body F. The side along the longitudinal direction X of the absorbent body 23 that extends inward in the longitudinal direction X and inward in the lateral direction Y along the leg edge LS that is the opening edge of the leg opening LH and constitutes the absorbent main body 2 It reaches the edge 23S and further extends inward in the lateral direction Y from the side edge 23S. The end of the elastic member 34 opposite to the side edge FS side is the absorbent main body 2 (absorber 23). ). The front leg elastic member 34 starting from one of the side edges FS, FS of the outer body 3 in the front body F is not connected to the front leg elastic member 34 starting from the other, and the pair of front sides The leg elastic members 34 and 34 are spaced apart from each other in the lateral direction Y to form a front discontinuous portion 341. The front discontinuous portion 341 is located at the center portion in the lateral direction Y of the exterior body 3 (diaper 1). In the front side discontinuous part 341, the elastic stretchability by an elastic member is not expressed. The front leg elastic member 34 starting from the one side edge FS and the front leg elastic member 34 starting from the other side edge FS have a horizontal center line (not shown) that bisects the diaper 1 in the horizontal direction Y. It is arranged symmetrically as a reference.

  As shown in FIGS. 2 and 3, the rear leg elastic member 35 has both side edges RS and RS (side seal portions S) of the exterior body 3 constituting the back side portion 1 </ b> C (trunk portion) in the back body R. Along the leg direction LS, which is the opening edge of the leg opening LH, extends inward in the longitudinal direction X and inward in the lateral direction Y and extends in the longitudinal direction X of the absorbent body 23 constituting the absorbent main body 2 It reaches the side edge 23S, further extends inward in the lateral direction Y from the side edge 23S, and the end of the elastic member 35 opposite to the side edge RS side is the absorbent main body 2 (absorber). 23). The rear leg elastic member 35 starting from one of the side edges RS, RS of the outer body 3 in the back body R is not connected to the rear leg elastic member 35 starting from the other, and the pair The rear leg elastic members 35, 35 are spaced apart from each other in the lateral direction Y to form a rear discontinuous portion 351. The rear discontinuous portion 351 is located in the center portion in the lateral direction Y of the exterior body 3 (diaper 1). In the rear discontinuous portion 351, the elastic stretchability by the elastic member is not exhibited. The rear leg elastic member 35 starting from the one side edge RS and the rear leg elastic member 35 starting from the other side edge RS are lateral center lines (not shown) that bisect the diaper 1 in the horizontal direction Y. ) As a reference.

  The front leg elastic member 34 and the rear leg elastic member 35 have one end portion in the length direction in the lateral direction Y at the ventral side portion 1A or the back side portion 1C in a plan view as shown in FIGS. The other end portion in the length direction is arranged along the lateral direction Y in the crotch part 1B so as to face the opposite side of the one end portion. It is arranged in a direction crossing both the direction X and the lateral direction Y, and has an inflection point at the intermediate portion. The “inflection point” here means the transition of two types of curves with different curvatures. The tangent drawn at this transition is not only on the side where one and the other of the curves are different, but also on the same side. Some of them are also included.

  As shown in FIGS. 2 and 3, the front leg elastic member 34 and the rear leg elastic member 35 are spaced apart from each other in the longitudinal direction X, thereby forming a separation region 1D. When there are a plurality of leg elastic members 34 and 35 as in the present embodiment, the region sandwiched between the leg elastic members 34 and 35 located at the innermost side in the longitudinal direction X is the separation region 1D. It is. The separation region 1D is located in the crotch 1B and has the excretory part facing part. The exterior body 3 has the narrowest width portion 3N having a shorter length in the lateral direction Y (narrower width) than other portions of the exterior body 3 in the separation region 1D.

The absorbent main body 2 is a portion in which the side edge portions 23S, 23S along the longitudinal direction X of the absorber 23 overlap with the front leg elastic member 34 and the rear leg elastic member 35 in a plan view as shown in FIGS. The outer body 3 (inner layer sheet 32) is joined at (absorber side edge portion-leg elastic member intersecting portion). As described above, when the absorbent main body 2 and the exterior body 3 are joined to each other at least at the absorber-side edge-leg elastic member intersection, when the diaper 1 is worn, the leg elastic members 34, 35, particularly When the portion of the leg elastic members 34, 35 located between the intersection and the inflection point is contracted, the absorbent main body 2 is pulled in the longitudinal direction X by the leg elastic members 34, 35. Therefore, the absorptive main body 2 (absorber 23) is not easily contracted in the vertical direction, and the shape retention of the crotch 1B is improved.
In this embodiment, the absorptive main body 2 and the inner layer sheet 32 include the absorber-side edge-leg elastic member intersection and correspond to the peripheral edge of the absorbent main body 2 or the vicinity thereof (within 50 mm from the peripheral edge). The absorptive main body 2 and the inner layer sheet 32 (exterior body 3) are not joined to each other except the part.

  As shown in FIGS. 2 to 4, the absorber 23 has a high rigidity region 23 </ b> H having a relatively high bending rigidity and a low rigidity region 23 </ b> L having a bending rigidity lower than that of the high rigidity region 23. The region 23H is located at the center in the horizontal direction Y. The absorber 23 has a pair of low-rigid regions 23L and 23L at both ends in the lateral direction Y, and has a high-rigid region 23H at the center in the lateral direction Y sandwiched between the pair of low-rigid regions 23L and 23L. doing. The arrangement position of the high-rigidity region 23H is not only the central portion in the lateral direction Y of the absorber 23 but also the central portion in the longitudinal direction X. The absorber 23 is also paired with both ends of the longitudinal direction X. Rigid regions 23L and 23L are provided. That is, the high rigidity region 23H of the absorber 23 is surrounded by the low rigidity region 23L. The high-rigidity region 23H is located at the center in the longitudinal direction of the crotch 1B, and one of the pair of low-rigidity regions 23L and 23L located at both ends in the longitudinal direction straddles the boundary between the ventral portion 1A and the crotch 1B, The other straddles the boundary between the back side 1C and the crotch 1B. The central part in the longitudinal direction of the absorbent body 23 where the high-rigidity region 23H exists is the narrowest narrow part whose length in the lateral direction Y is shorter than other parts of the absorbent body 23. The high-rigidity region 23H has a rectangular shape in plan view, and both side edges 23HS, 23HS along the vertical direction X are both side edges 23S, 23S along the vertical direction X of the absorber 23 in the portion where the high-rigidity region 23H is located. It is located inward in the lateral direction Y.

  The “bending rigidity” in the present invention can be measured with a handle-ometer in accordance with Japanese Industrial Standard “JIS L-1096 (General Textile Testing Method)”. The larger the measured value, the higher the bending rigidity and the less the bending is. To be judged. Specifically, the bending stiffness can be measured by the handle-ometer as follows. First, a 25 mm × 25 mm square shape is cut out from the measurement target site in the absorber to obtain a measurement sample. Next, the measurement sample is arranged on a support table with a groove having a width of 10 mm so that the groove and the direction corresponding to the lateral direction of the diaper of the measurement sample are orthogonal to each other. Then, the center of the measurement sample is pushed with a blade having a thickness of 2 mm, and the resistance value (g) when the measurement sample is pushed in by 8 mm is measured with a load cell. The measurement is performed three times with different measurement samples, and the average value is taken as the measurement value. If a measurement sample of 25 mm × 25 mm cannot be cut out, a smaller measurement sample may be used. In that case, the measurement sample of the same size obtained from the high rigidity region and the low rigidity region is used, and the groove width of the support base is set. Compare the measurement results of 5 mm.

  In the present embodiment, the high-rigidity region 23H of the absorbent body 23 has a relatively high basis weight of the absorbent material (water-absorbing polymer particles, fiber material, etc.), and the low-rigidity region 23L absorbs more than the high-rigidity region 23H. The basis weight of the body material is low. More specifically, as shown in FIG. 4, the absorbent body 23 is a laminated body (two layers) composed of an upper layer absorbent body 230 and a lower layer absorbent body 231 disposed on the non-skin facing surface side of the upper layer absorbent body 230. Layer structure), a portion where the laminate is present is a high rigidity region 23H having a relatively high basis weight, and a portion where the laminate (upper layer absorber 230) is not present. Is a low rigidity region 23L having a relatively low basis weight. The upper-layer absorber 230 has a rectangular shape in plan view, the length in the longitudinal direction X is shorter than that of the lower-layer absorber 231, and the length of the narrowest width portion of the lower-layer absorber 231 having the shortest lateral direction Y length. The length in the lateral direction Y is shorter than that. The lower layer absorber 231 has a larger size in plan view than the upper layer absorber 230, forms the outer shape of the absorber 23, and has a plan view hourglass shape (dumbbell shape) in which the central portion in the longitudinal direction X is constricted. . The upper layer absorber 230 is arranged at the center of the skin facing surface of the lower layer absorber 231. As the upper layer absorbent body 230 and the lower layer absorbent body 231, an absorbent core containing an absorbent material can be used, respectively, and the absorbent core has a surface covered with a core wrap sheet such as paper or nonwoven fabric. Also good. Moreover, the upper layer absorber 230 and the lower layer absorber 231 may be joined to each other by an adhesive.

  As one of the main features of the diaper 1 of this embodiment, as shown in FIG.2 and FIG.3, the high rigidity area | region 23H of the absorber 23 distribute | arranged to the center of the horizontal direction Y of the diaper 1, ie, upper layer absorption. The point which the laminated body of the body 230 and the lower layer absorber 231 continues over the full length of the vertical direction X of 1 A of separation areas is mentioned. In the present embodiment, the high-rigidity region 23H extends outward in the vertical direction X from both ends in the vertical direction X of the separation region 1D, and the high-rigidity region 23H is longer in the vertical direction X than the separation region 1D. Is long. With such a configuration, the contraction in the longitudinal direction X of the absorbent main body 2 (absorber 23) in the separation region 1D is suppressed, and the shape retaining property of the separation region 1D (crotch portion 1B) is improved. Since the entire absorbent main body 2 (absorbent body 23) is sufficiently pulled up toward the wearer's crotch side and a sufficient crotch width for wearing the diaper 1 is secured, the leg opening LH has feet. The diaper 1 is easy to put on and the feeling of wearing is improved. In particular, in the present embodiment, as described above, in combination with the absorbent main body 2 and the exterior body 3 being joined to each other at least at the absorber side edge portion-leg elastic member intersection portion, The shape retaining property is further improved, and the ease of wearing and the feeling of wearing of the diaper 1 are further improved. From the viewpoint of more reliably achieving such an effect, the lateral length of the high-rigidity region 23H located in the central portion in the lateral direction Y is the same as that of each of the low-rigidity regions 23L and 23L located at both ends in the lateral direction Y. It is preferable that the length is longer than the lateral length.

  In the present embodiment, as shown in FIGS. 2 and 3, the front leg elastic member 34 and the rear leg elastic member 35 intersect with the side edge 23HS along the longitudinal direction X of the high-rigidity region 23H in plan view, respectively. doing. That is, the front leg elastic member 34 and the rear leg elastic member 35 respectively extend inward in the lateral direction Y from the side edge 23S of the absorber 23 and reach the side edge 23HS of the high-rigidity region 23H. Furthermore, it extends inward in the lateral direction Y. That is, the high-rigidity region 23H exists (overlaps in plan view) at a position overlapping with the front discontinuous portion 341 that is a discontinuous portion in the lateral direction Y of the pair of front leg elastic members 34, 34 and It exists in the position which overlaps with the rear side discontinuous part 351 which is a discontinuous part in the horizontal direction Y of the side leg elastic members 35 and 35 (it overlaps in planar view). With such a configuration, the shape retention of the separation region 1D (the crotch portion 1B) is further improved, so that the high-rigidity region 23H described above is continuous over the entire length in the vertical direction X of the separation region 1D. The effect is more reliably achieved.

  Moreover, in this embodiment, as shown in FIG.2 and FIG.3, the highly rigid area | region 23H exists only between the crossing parts 340 and 350 with the front leg elastic member 34 and the rear leg elastic member 35, respectively. , It does not exist outside the vertical direction X from the intersections 340 and 350. When the high-rigidity region 23H exists outside the crossing portions 340 and 350 in the longitudinal direction X, the contractility of the abdominal side portion 1A and the back side portion 1C (the waistline portion) is reduced, and the diaper 1 is attached. In this case, there is a possibility that the force for pulling up the absorbent main body 2 (absorbent body 23) to the crotch side of the wearer may be reduced. However, the high rigidity region 23H exists only between the intersecting portions 340 and 350, and such concerns are eliminated. Thus, the above-described operation and effect due to the fact that the high-rigidity region 23H is continuous over the entire length in the longitudinal direction X of the separation region 1D can be achieved more reliably.

  In the present embodiment, as shown in FIGS. 2 and 3, the front leg elastic member 34 and the rear leg elastic member 35 are regions corresponding to the high rigidity region 23H in the exterior body 3 (high in plan view). In the region overlapping with the rigid region 23H), the absorbent body 2 (absorber 23) is prevented from contracting in the longitudinal direction X by the leg elastic members 34, 35. With such a configuration, the above-described operational effect due to the fact that the high-rigidity region 23H is continuous over the entire length in the vertical direction X of the separation region 1D can be achieved more reliably.

  The length 1DLx in the longitudinal direction X of the separation region 1D is the length in the longitudinal direction 34Lx of the region in which the front leg elastic member 34 is disposed and the length X in the region in which the rear leg elastic member 35 is disposed. It is preferably longer than 35Lx and the length 35Lx is longer than the length 34Lx. Thus, with respect to the longitudinal length of the arrangement region of the separation region 1D and the leg elastic members 34, 35, the length 1DLx of the separation region 1D> the lengths 34Lx, 35Lx of the leg elastic members 34, 35 and the rear leg elasticity. When the relationship of the length 35Lx of the member 35> the length 34Lx of the front leg elastic member 34 is satisfied, the absorption is supported by the leg elastic members 34 and 35 and pulled up to the wearer's crotch side in the wearing operation of the diaper 1. The length of the main body 2 (absorber 23) is sufficiently secured, and the pulling force is sufficiently secured, whereby the high-rigidity region 23H described above extends over the entire length in the longitudinal direction X of the separation region 1D. Combined with being continuous, the shape retention of the separation region 1D can be further improved.

The ratio (length 1DLx / length 34Lx) of the length 1DLx in the vertical direction X of the separation region 1D to the vertical length 34Lx of the front leg elastic member 34 is preferably greater than 1.0, more preferably 1. 15 or more, preferably 15 or less, more preferably 12.5 or less, more specifically, preferably more than 1.0 and 15 or less, more preferably 1.15 or more and 12.5 or less.
The ratio (length 1DLx / length 35Lx) of the length 1DLx in the vertical direction X of the separation region 1D to the vertical length 35Lx of the rear leg elastic member 35 is preferably greater than 1.0, more preferably 1 0.25 or more, and preferably 6.0 or less, more preferably 5.0 or less, more specifically, preferably more than 1.0 and 6.0 or less, more preferably 1.25 or more and 5.0 or less. is there.
The ratio of the longitudinal length 34Lx of the front leg elastic member 34 to the longitudinal length 35Lx of the rear leg elastic member 35 (length 34Lx / length 35Lx) is preferably 0.1 or more, more preferably 0.8. 25 or more, and preferably 0.85 or less, more preferably 0.75 or less, more specifically preferably 0.1 or more and 0.85 or less, more preferably 0.25 or more and 0.75 or less. .

The length 1DLx in the longitudinal direction X of the separation region 1D is preferably 150 mm or more, more preferably 170 mm or more, and preferably 300 mm or less, more preferably 250 mm or less, more specifically, preferably 150 mm or more and 300 mm or less, More preferably, it is 170 mm or more and 250 mm or less.
The longitudinal length 34Lx of the front leg elastic member 34 is preferably 20 mm or more, more preferably 50 mm or more, and preferably 150 mm or less, more preferably 130 mm or less, more specifically, preferably 20 mm or more and 150 mm or less, More preferably, they are 50 mm or more and 130 mm or less.
The longitudinal length 35Lx of the rear leg elastic member 35 is preferably 50 mm or more, more preferably 80 mm or more, and preferably 200 mm or less, more preferably 180 mm or less, more specifically, preferably 50 mm or more and 200 mm or less. More preferably, it is 80 mm or more and 180 mm or less.

  As shown in FIGS. 2 and 3, the absorbent body 23 has a longer length in the lateral direction Y than the other parts of the absorbent body 23 at the center in the vertical direction X (the portion located in the separation region 1D). In the present embodiment, the narrowest width portion of the absorber 23 and the narrow width portion 3N of the exterior body 3 are in the same position in the vertical direction X. With such a configuration, the leg opening LH is improved in legging and thereby the ease of wearing of the diaper 1 is improved. Therefore, the high-rigidity region 23H is the entire length in the vertical direction X of the separation region 1D. Thus, the effect of being continuous is more reliably exhibited.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, the outer layer sheet 31 is configured by combining a plurality of sheets. However, similarly to the inner layer sheet 32, the outer layer sheet 31 may be configured by one continuous sheet.
Moreover, the exterior body 3 is divided | segmented into the exterior body ventral region located in a ventral side part, and the exterior body back side area | region located in a back side part, The absorptive main body 2 is the said exterior body ventral region, It may be bridged and fixed to the exterior body back side field.
The following additional notes are disclosed with respect to the embodiment of the present invention described above.

<1>
An absorbent main body having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular thereto, and having a liquid-retaining absorbent, and disposed on the non-skin facing surface side of the absorbent main body And a pair of side seal portions, a waist opening portion, and a pair of side seals that are joined to each other along the longitudinal direction of the exterior body in each of the front body and the back body. A pants-type absorbent article in which a leg opening is formed,
The exterior body has stretchability in the lateral direction at the waist part of each of the front body and the back body,
The outer body is arranged as a leg elastic member that forms a leg gather at the opening edge of each of the pair of leg openings, and a front leg elastic member arranged in an extended state on the front body, and an extended state on the rear body. A rear leg elastic member,
The front leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waist part in the front body. Has reached the side edge along the longitudinal direction of the body,
The rear leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waistline portion in the back body. It has reached the side edge along the longitudinal direction of the absorber,
The front leg elastic member and the rear leg elastic member are spaced apart from each other in the longitudinal direction to form a separation region;
The absorbent main body is joined to the exterior body at a portion where both side edge portions along the longitudinal direction of the absorber and the front leg elastic member and the rear leg elastic member overlap in plan view.
The absorber has a high-rigidity region having a relatively high bending rigidity and a low-rigidity region having a bending rigidity lower than that of the high-rigidity region, and the high-rigidity region is located at a central portion in the lateral direction, And the underpants type absorbent article which continues over the full length of the vertical direction of the said separation | spacing area | region.

<2>
The longitudinal length of the separation region is longer than the longitudinal length of the region where the front leg elastic member is disposed and the longitudinal length of the region where the rear leg elastic member is disposed, and the front side The underpants-type absorbent article according to <1>, wherein the longitudinal length of the region in which the rear leg elastic member is disposed is longer than the longitudinal length of the region in which the leg elastic member is disposed.
<3>
Each of the front leg elastic member and the rear leg elastic member intersects with a side edge along the longitudinal direction of the high-rigidity region in plan view, respectively, according to <1> or <2>. Goods.
<4>
The underpants-type absorbent article according to <3>, wherein the high-rigidity region exists only between intersections of the front leg elastic member and the rear leg elastic member.
<5>
The front leg elastic member and the rear leg elastic member are any one of the items <1> to <4> arranged in the lateral direction in a region corresponding to the high rigidity region in the exterior body. The underpants-type absorbent article according to one item.
<6>
The exterior body is arranged across the abdominal side which is the waistline part of the front body, the back side part which is the waistline part of the back body, and the crotch part sandwiched between the abdominal side part and the back side part. Is not stretchable in the lateral direction in the crotch,
The said exterior body has the narrowest narrow part whose lateral direction length is shorter than the other site | part of this exterior body in the said separation | spacing area | region, It is any one of said <1>-<5>. Pants-type absorbent article.
<7>
The absorbent body has a narrowest width portion having a lateral length shorter than other portions of the absorbent body at a longitudinal center portion thereof, and the narrowest width portion of the absorbent body and the narrow width of the exterior body. The pants-type absorbent article according to <6>, wherein the part is located at the same position in the longitudinal direction.
<8>
The high rigidity region has a relatively high basis weight of the absorbent material, and the low rigidity region has a lower basis weight of the absorbent material than the high rigidity region. The underpants type absorbent article as described.

<9>
The front leg elastic member starting from one of both side edges of the exterior body constituting the waistline portion of the front body and the front leg elastic member starting from the other are spaced apart from each other in the lateral direction. The front discontinuity is formed, the front discontinuity is located in the lateral center of the exterior body,
The rear leg elastic member starting from one of both side edges of the exterior body constituting the waistline portion in the back body and the rear leg elastic member starting from the other are mutually in the lateral direction. The back side discontinuous part is spaced apart and forms the back side discontinuous part, and the back side discontinuous part is located in the transverse direction central part of the exterior body, It is described in any one of said <1>-<8>. Pants-type absorbent article.
<10>
The pants-type absorbent article according to <9>, wherein the high-rigidity region exists at a position overlapping the front discontinuous portion and the rear discontinuous portion.

<11>
The pants-type absorbent article according to any one of <1> to <10>, wherein the absorbent body has a pair of the low rigidity regions at both longitudinal ends.
<12>
The pants-type absorbent article according to any one of <1> to <11>, wherein the high-rigidity region is surrounded by the low-rigidity region.
<13>
The lateral length of the high-rigidity region is any one of the above <1> to <12>, which is longer than the lateral lengths of the low-rigidity regions located on both lateral sides of the high-rigidity region. Pants-type absorbent article.
<14>
The high-rigidity region is any one of <1> to <13> configured by a laminate including an upper layer absorbent body and a lower layer absorbent body disposed on the non-skin facing surface side of the upper layer absorbent body. The pants-type absorbent article described in 1.
<15>
The pants-type absorption according to any one of <1> to <14>, wherein the absorbent body includes a liquid-retaining absorbent core and a core wrap sheet that covers the absorbent core. Sex goods.

<16>
The former / the latter, which is the ratio of the longitudinal length of the spaced region and the longitudinal length of the front leg elastic member, is preferably greater than 1.0, more preferably 1.15 or more, and preferably 15 or less. More preferably, it is 12.5 or less, more specifically, preferably more than 1.0 and 15 or less, more preferably 1.15 or more and 12.5 or less, according to any one of the above items <1> to <15>. The underpants type absorbent article as described.
<17>
The former / latter, which is the ratio of the longitudinal length of the spaced region to the longitudinal length of the rear leg elastic member, is preferably greater than 1.0, more preferably 1.25 or more, and preferably 6. <1> to <16>, which is 0 or less, more preferably 5.0 or less, more specifically preferably more than 1.0 and 6.0 or less, and more preferably 1.25 or more and 5.0 or less. The underpants type absorbent article as described in any one of Claims.
<18>
The former / the latter, which is the ratio of the longitudinal length of the front leg elastic member to the longitudinal length of the rear leg elastic member, is preferably 0.1 or more, more preferably 0.25 or more, and preferably 0. .85 or less, more preferably 0.75 or less, more specifically, preferably 0.1 or more and 0.85 or less, more preferably 0.25 or more and 0.75 or less, <1> to <17> The underpants type absorbent article as described in any one of these.
<19>
The longitudinal length of the separation region is preferably 150 mm or more, more preferably 170 mm or more, and preferably 300 mm or less, more preferably 250 mm or less, more specifically, preferably 150 mm or more and 300 mm or less, more preferably The pants-type absorbent article according to any one of <1> to <17>, which is 170 mm to 250 mm.
<20>
The longitudinal length of the front leg elastic member is preferably 20 mm or more, more preferably 50 mm or more, and preferably 150 mm or less, more preferably 130 mm or less, more specifically preferably 20 mm or more and 150 mm or less, The pants-type absorbent article according to any one of <1> to <19>, which is preferably 50 mm or more and 130 mm or less.
<21>
The longitudinal length of the rear leg elastic member is preferably 50 mm or more, more preferably 80 mm or more, and preferably 200 mm or less, more preferably 180 mm or less, more specifically preferably 50 mm or more and 200 mm or less, More preferably, the pant-type absorbent article according to any one of <1> to <20>, which is 80 mm or more and 180 mm or less.

<22>
The exterior body includes an outer layer sheet positioned on a side relatively far from the wearer's body and an inner layer sheet positioned on a side relatively closer to the wearer's body, and the front side between both sheets. The leg elastic member and the rear leg elastic member are interposed, and the absorbent main body is joined to the inner layer sheet. The pant-type absorbent according to any one of <1> to <21>. Goods.
<23>
The outer layer sheet is an abdominal outer layer sheet that constitutes an abdominal side portion disposed on the abdomen side of the wearer in a worn state, a back side outer layer sheet that constitutes a back side portion disposed on the back side, and both the sheets. The underpants-type absorbent article according to the above <22>, comprising a crotch outer layer sheet that constitutes a crotch part that is located between the crotch parts and is located in between.
<24>
The pants-type absorbent article according to <22> or <23>, wherein the ventral outer layer sheet and the back outer layer sheet have elasticity in a lateral direction.
<25>
The pants-type absorbent article according to any one of <22> to <24>, wherein the crotch outer layer sheet and the inner layer sheet are not stretchable and are not stretchable.
<26>
Any one of the above <22> to <25>, wherein the ventral outer layer sheet and the back outer layer sheet have a configuration in which a thread-like elastic filament is bonded to one surface of an extensible fiber layer mainly composed of non-elastic fibers. The pants-type absorbent article according to Item.
<27>
<22> to <26, wherein the absorbent main body and the inner layer sheet are bonded to each other by an adhesive at a portion corresponding to within 50 mm from the peripheral edge of the absorbent main body or in the vicinity thereof. > The pants-type absorbent article according to any one of the above.
<28>
<1> The absorbent main body includes a top sheet that forms a skin facing surface, a back sheet that forms a non-skin facing surface, and the liquid-retaining absorbent disposed between both sheets. The underpants type absorbent article as described in any one of-<27>.

1 Pants-type disposable diapers (pants-type absorbent articles)
2 Absorbent body 21 Top sheet 22 Back sheet 23 Absorber 23S Side edge 230 along the longitudinal direction of the absorber Upper layer absorbent body 231 Lower layer absorbent body 23H High rigidity region 23HS Side edge 23U along the longitudinal direction of the high rigidity region Low rigidity region 24 Side cuffs (solid gathers)
3 Outer Body 3N Narrowest Width 31 of Outer Body 31 Outer Layer Sheet 31A Abdominal Outer Layer Sheet 31B Inseam Outer Layer Sheet 31C Back Outer Layer Sheet 32 Inner Layer Sheet 33 Waist Elastic Member 34 Front Leg Elastic Member 340 Front Leg Elastic Member and High Rigid Area Crossing portion 341 Front discontinuous portion 35 Rear leg elastic member 350 Crossing portion 351 between rear leg elastic member and high-rigidity region Discontinuous discontinuous portion F Front body R Rear body 1A Abdominal side (the waist part of the front body) )
1B Crotch 1C Back side (back waist part)
1D separation area X vertical direction Y horizontal direction

Claims (9)

An absorbent main body having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular thereto, and having a liquid-retaining absorbent, and disposed on the non-skin facing surface side of the absorbent main body And a pair of side seal portions, a waist opening portion, and a pair of side seals that are joined to each other along the longitudinal direction of the exterior body in each of the front body and the back body. A pants-type absorbent article in which a leg opening is formed,
The exterior body has stretchability in the lateral direction at the waist part of each of the front body and the back body,
The outer body is arranged as a leg elastic member that forms a leg gather at the opening edge of each of the pair of leg openings, and a front leg elastic member arranged in an extended state on the front body, and an extended state on the rear body. A rear leg elastic member,
The front leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waist part in the front body. Reaching the side edge along the longitudinal direction of the body, and further extending inward in the lateral direction from the side edge, and the end of the elastic member opposite to the side edge side of the absorbent body Located in the placement area,
The end portion of the front leg elastic member starting from one of the side edges of the exterior body and the end portion of the front leg elastic member starting from the other are spaced apart from each other in the lateral direction, The front leg elastic member is arranged so as to form a front discontinuity at the lateral center of the body,
The rear leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waistline portion in the back body. It reaches the side edge along the longitudinal direction of the absorbent body , further extends inward in the lateral direction from the side edge, and the end of the elastic member opposite to the side edge side is the absorbent main body. Located in the placement area of
The end portion of the rear leg elastic member starting from one of the side edges of the exterior body and the end portion of the rear leg elastic member starting from the other are separated from each other in the lateral direction, The rear leg elastic member is disposed so as to form a rear discontinuous portion in the laterally central portion of the exterior body,
The front leg elastic member and the rear leg elastic member are spaced apart from each other in the longitudinal direction to form a separation region;
The absorbent main body is joined to the exterior body at a portion where both side edge portions along the longitudinal direction of the absorber and the front leg elastic member and the rear leg elastic member overlap in plan view.
The absorber has a high-rigidity region having a relatively high bending rigidity and a low-rigidity region having a bending rigidity lower than that of the high-rigidity region, and the high-rigidity region is located at a central portion in the lateral direction, And the underpants type absorbent article which continues over the full length of the vertical direction of the said separation | spacing area | region. The longitudinal length of the separation region is longer than the longitudinal length of the region where the front leg elastic member is disposed and the longitudinal length of the region where the rear leg elastic member is disposed, and the front side The pants-type absorbent article according to claim 1, wherein the longitudinal length of the region in which the rear leg elastic member is disposed is longer than the longitudinal length of the region in which the leg elastic member is disposed.   3. The pant-type absorbent article according to claim 1, wherein each of the front leg elastic member and the rear leg elastic member intersects a side edge along a longitudinal direction of the high-rigidity region in plan view.   The pants-type absorbent article according to claim 3, wherein the high-rigidity region exists only between intersections of the front leg elastic member and the rear leg elastic member.   The said front leg elastic member and the said back leg elastic member are respectively arrange | positioned along the horizontal direction in the area | region corresponding to the said highly rigid area | region in the said exterior body. The underpants type absorbent article as described. The exterior body is arranged across the abdominal side which is the waistline part of the front body, the back side part which is the waistline part of the back body, and the crotch part sandwiched between the abdominal side part and the back side part. Is not stretchable in the lateral direction in the crotch,
The pants-type absorption according to any one of claims 1 to 5, wherein the exterior body has a narrowest width portion having a lateral length shorter than other portions of the exterior body in the separation region. Sex goods.   The absorbent body has a narrowest width portion having a lateral length shorter than other portions of the absorbent body at a longitudinal center portion thereof, and the narrowest width portion of the absorbent body and the narrow width of the exterior body. The pants-type absorbent article according to claim 6, wherein the portion is at the same position in the longitudinal direction.   The pants according to any one of claims 1 to 7, wherein the high rigidity region has a relatively high basis weight of the absorbent material, and the low rigidity region has a lower basis weight of the absorbent material than the high rigidity region. Mold absorbent article. An absorbent main body having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular thereto, and having a liquid-retaining absorbent, and disposed on the non-skin facing surface side of the absorbent main body And a pair of side seal portions, a waist opening portion, and a pair of side seals that are joined to each other along the longitudinal direction of the exterior body in each of the front body and the back body. A pants-type absorbent article in which a leg opening is formed,
The exterior body has stretchability in the lateral direction at the waist part of each of the front body and the back body,
The outer body is arranged as a leg elastic member that forms a leg gather at the opening edge of each of the pair of leg openings, and a front leg elastic member arranged in an extended state on the front body, and an extended state on the rear body. A rear leg elastic member,
The front leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waist part in the front body. Has reached the side edge along the longitudinal direction of the body,
The rear leg elastic member extends inward in the longitudinal direction and inward in the lateral direction along the opening edge of the leg opening from each side edge of the exterior body constituting the waistline portion in the back body. It has reached the side edge along the longitudinal direction of the absorber,
The front leg elastic member and the rear leg elastic member are spaced apart from each other in the longitudinal direction to form a separation region;
The absorbent main body is joined to the exterior body at a portion where both side edge portions along the longitudinal direction of the absorber and the front leg elastic member and the rear leg elastic member overlap in plan view.
The absorber has a high-rigidity region having a relatively high bending rigidity and a low-rigidity region having a bending rigidity lower than that of the high-rigidity region, and the high-rigidity region is located at a central portion in the lateral direction, And is continuous over the entire length in the longitudinal direction of the spacing region,
Each of the front leg elastic member and the rear leg elastic member intersects a side edge along the longitudinal direction of the high-rigidity region in plan view,
The said highly rigid area | region is a pants type absorbent article which exists only in the cross | intersection part with each of the said front leg elastic member and the said back leg elastic member.

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