JP2020018483A - Underpants-type disposable wearing article - Google Patents

Abstract

To improve touch to a skin in a part positioned in an end part of a leg opening in an exterior body.SOLUTION: The problem is solved by an underpants-type disposable wearing article which includes: an exterior body 12F, 12B which has three or more sheet layers in a lower end part 80 in a wing region J and a non-joined part 87 where at least one of an innermost layer 84 and an outermost layer 85 is not joined to an inner sheet layer 86 overlapped with the back of the sheet layer; the non-joined part 87 which continues in a width direction WD in a range including a region between a lower end part elastic member 83 in a lowermost position and a lower edge in the wing region J in a front-back direction LD; a gap, between at least one of the innermost sheet layer 84 and the outermost sheet layer 85 and the inner sheet layer 86 overlapped with the back of the sheet layer, which is closed at both sides in the front-back direction LD of the non-joined part 87; and lower end part gatherings UG where the lower end part 80 in the wing region J contracts in the front-back direction LD by the contraction of the lower end part elastic member 83.SELECTED DRAWING: Figure 13

Description

  TECHNICAL FIELD The present invention relates to a pants-type disposable wearing article with improved feel (flexibility, cushioning property) at the end of a leg opening.

  A typical example of a disposable wearing article having a leg opening is a pants-type disposable diaper. The pants-type disposable diaper has an outer body constituting at least a waist portion of a front body and a back body, and an inner body including an absorber attached to the outer body so as to extend from the front body to the back body, Generally, a waist opening and a pair of left and right leg openings are formed by joining a side seal portion by joining both sides of a front body exterior body and both sides of a rear body exterior body. (For example, see Patent Document 1).

  In conventional pants-type disposable diapers, the entire end of the leg opening was formed only by the outer body, but recently, the upper part (the part near the waist) of the end of the leg opening is formed by the outer body. In many cases, the other part is formed by the side part of the inner body (for example, see Patent Document 1).

  However, in the conventional pants-type disposable wearing article, there is room for improvement in the feel of the portion of the exterior body located at the end of the leg opening, particularly in the flexibility and cushioning property (compression recovery property) of the sheet layer.

JP 2006-122396 A

  Therefore, a main object of the present invention is to improve the feel of a portion of an exterior body located at an end of a leg opening.

The pants-type disposable wearing article which solved the above-mentioned problem is as follows.
<First aspect>
A front exterior body constituting at least a waist portion of the front body and a rear exterior body constituting at least a waist portion of the rear body are separately provided, and the front exterior body and the rear exterior body are separated in the front-rear direction,
An interior body extends in the front-rear direction from the front exterior body to the rear exterior body, and is joined to the front exterior body and the rear exterior body, respectively.
A side seal portion in which both sides of the front exterior body and both sides of the rear exterior body are joined, a waist opening and a pair of left and right leg openings,
A lower edge of a wing region extending on both sides of the inner body in the front exterior body and the rear exterior body is an upper edge of the leg opening,
The lower end of the wing region has one or more elongated lower end elastic members provided along the width direction and spaced from each other, and a first sheet layer facing the outside of the lower end elastic member. And a second sheet layer facing the inside of the lower end elastic member,
The lower end elastic member is fixed to the first sheet layer and the second sheet layer,
In pants-type disposable wearing articles,
The lower end of the wing region has three or more sheet layers including the first sheet layer and the second sheet layer, and overlaps the back of at least one of the innermost sheet layer and the outermost sheet layer. It has a non-joined part where the inner sheet layer is not joined,
The non-joined portion continues in the width direction in a front-rear direction range including a region between a lowermost elastic member located at a lowermost position and a lower edge of the wing region,
The gap between at least one of the innermost sheet layer and the outermost sheet layer and the inner sheet layer overlapping the back thereof is closed on both sides in the front-rear direction of the non-joined portion,
A lower end portion of the wing region is contracted in the front-rear direction by contraction of the lower end elastic member, and a lower end gather is formed in a portion including the non-joined portion at a lower end portion of the wing region,
Pants-type disposable wearing article characterized by the above-mentioned.

(Effects)
In the present pants-type disposable wearing article, the lower end of the wing region contracts in the width direction with the contraction of the lower end elastic member, and a lower end gather is formed in a portion including a non-joined portion at the lower end of the wing region. That is, the folds of the lower end gathers are formed side by side in the width direction at the portion including the non-joined portion at the lower end of the wing region. Here, the non-joined portion is a portion where at least one of the innermost sheet layer and the outermost sheet layer and the inner sheet layer overlapping the back thereof are not joined. Direction is closed on both sides. In addition, the non-joined portion continues in the width direction in a front-rear direction range (a range equal to or more than the region) including a region between the lowermost elastic member located at the sidemost side and a lower edge of the wing region. ing. That is, a hollow portion surrounded by the sheet layer continues in the width direction at the non-joined portion. As a result, the fold formed in the non-joined portion is formed by at least one of the innermost sheet layer and the outermost sheet layer greatly expanding, and becomes large and soft (that is, rich in cushioning properties). Therefore, since the large soft fold is formed inside, outside, inside and outside both sides, or in the entire thickness direction of the area including the lower edge of the wing region, the feel of the end of the leg opening in the exterior body becomes good. .

<Second aspect>
The non-joined portion extends from a lower edge of the wing region to a position separated from the waist opening side by 2 to 15 mm,
The pants-type disposable wearing article according to the first aspect.

(Effects)
The width of the non-joined portion may be determined as appropriate, but is usually preferably within the range of this embodiment.

<Third aspect>
The portion from the lower edge in the wing region to the waist opening side from 2 to 15 mm does not include the lower end elastic member, and includes a part or all of the non-joined portion,
The pants-type disposable wearing article according to the first or second aspect.

(Effects)
As described above, when the lower end elastic member is sufficiently separated from the lower edge of the wing area, and the separated portion includes a part or all of the non-joined portion, when the product is held by hand at the time of mounting or purchasing, or Since a large fold rich in flexibility and cushion is formed in the entire thickness direction below the portion pressed against the skin (that is, the portion having the lower end elastic member) during wearing, the end of the leg opening in the exterior body is formed. It is particularly preferable for improving the touch.

<Fourth aspect>
At a position overlapping the non-joined portion in the thickness direction, at least one lower end elastic member is provided,
The pants-type disposable wearing article according to any one of the first to third aspects.

(Effects)
The positional relationship between the non-joined portion and the lower end elastic member can be determined as appropriate, but if at least one lower end elastic member is provided at a position overlapping the non-joined portion in the thickness direction, the contraction of the lower end elastic member will occur. It is preferable because the force is directly applied to the non-joined portion, and the fold shape maintenance at the non-joined portion becomes high.

<Fifth aspect>
The inner sheet layer is non-fixed to sheet layers adjacent on both sides in the thickness direction,
The pants-type disposable wearing article according to any one of the first to fourth aspects.

(Effects)
In this structure, the folds are independently formed on the inner sheet layer by the contraction force of the lower end elastic member. That is, the fold formed by at least one of the innermost sheet layer and the outermost sheet layer being greatly expanded is supported by the fold of the inner sheet layer independently formed inside the fold, so that a more excellent cushion is provided. A flexible fold is formed at the lower end of the wing area.

<Sixth aspect>
One of the sheet material of the first sheet layer and the sheet material of the second sheet layer is a portion forming the innermost sheet layer or the outermost sheet layer, and a lower edge of the wing region, Folded back to the side having the lower end elastic member, and a portion forming the internal sheet layer,
At least a part of the portion forming the internal sheet layer is joined to one of the sheet material of the first sheet layer and the sheet material of the second sheet layer,
The pants-type disposable wearing article according to any one of the first to fourth aspects.

(Effects)
In this structure, the inner sheet layer can be formed by the sheet material forming one of the first sheet layer and the second sheet layer sandwiching the lower end elastic member, and the innermost sheet layer or the outermost sheet layer can be formed. Since the layered portion has a restoring force against folding back of the portion forming the inner sheet layer, a fold having better cushioning properties is formed at the lower end of the wing region with less sheet material.

<Seventh aspect>
The sheet material of the first sheet layer and the sheet material of the second sheet layer have a folded portion that is folded to either the inside or the outside at the lower edge of the wing region,
The innermost sheet layer and the outermost sheet layer include a portion on one side of the sheet material of the first sheet layer and the sheet material of the second sheet layer with respect to a folding position of one of the sheet materials. Part on the other side,
The inner sheet layer is a portion on one side and a portion on the other side across a folding position of one of the sheet materials of the first sheet layer and the sheet material of the second sheet layer.
The pants-type disposable wearing article according to any one of the first to sixth aspects.

(Effects)
In this structure, by folding the first sheet layer and the second sheet layer sandwiching the lower end elastic member, two sheet layers other than the first sheet layer and the second sheet layer can be formed. Therefore, a fold having better cushioning properties is formed at the lower end of the wing region with less sheet material.

  ADVANTAGE OF THE INVENTION According to this invention, the advantage that the touch of the edge part of the leg opening in an exterior body improves, etc. are brought.

It is a top view which shows the inner surface of the pants | underpants type disposable diaper of a deployment state. It is a top view which shows the outer surface of the pants | underpants type disposable diaper of a deployment state. It is 2-2 sectional drawing of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4A is a sectional view taken along line 4-4 of FIG. 1 and FIG. 4B is a sectional view taken along line 5-5 of FIG. It is a perspective view of a pants type disposable diaper. It is a top view which shows the outer surface of the interior body of an expansion state with the outline of an exterior body. FIG. 4 is a sectional view of another example corresponding to the section 4-4 in FIG. 1. FIG. 2 is a sectional view of another example corresponding to the section 2-2 in FIG. 1. FIG. 3 is a sectional view of another example corresponding to the section 3-3 in FIG. 1. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is sectional drawing of a front exterior body and a rear exterior body. It is sectional drawing of a front exterior body and a rear exterior body. It is sectional drawing of a front exterior body and a rear exterior body. It is sectional drawing of a front exterior body and a rear exterior body.

  Hereinafter, a pants-type disposable diaper will be described in detail with reference to the accompanying drawings as an example of a disposable wearing article. The dot pattern portion in the cross-sectional view indicates an adhesive as a joining means for joining each component located on the front side and the back side, and is a solid, bead, curtain, summit or spiral application of hot melt adhesive, or a pattern coating. (Transfer of hot melt adhesive in letterpress system) or the like, or the fixed part of the elastic member is formed by applying to the outer peripheral surface of the elastic member such as a comb gun or a wrapping instead or together with this. is there. Examples of the hot-melt adhesive include EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester / polyamide-based adhesives, but can be used without any particular limitation. As a joining means for joining the constituent members, means by material welding such as heat sealing or ultrasonic sealing can be used.

  1 to 6 show an example of a pants-type disposable diaper. This pants-type disposable diaper includes a rectangular front exterior body 12F constituting at least a waist part of a front body F and a rectangular rear exterior body 12B constituting at least a waist part of a rear body B; And an inner body 200 provided inside the outer bodies 12F and 12B so as to extend to the rear outer body 12B through the inner portion. Both sides of the front outer body 12F and both sides of the rear outer body 12B are provided. By being joined to form the side seal portion 12A, the opening formed by the front and rear ends of the exterior bodies 12F and 12B becomes a waist opening WO through which the wearer's torso passes. The portions respectively surrounded by the lower edges of 12F and 12B and the side edges of the interior body 200 become the leg openings LO through which the legs pass. The inner body 200 is a part that absorbs and retains excretions such as urine, and the outer bodies 12F and 12B are parts that support the inner body 200 with respect to the wearer's body. Reference numeral Y indicates the overall length of the diaper in the deployed state (length in the front-back direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and reference numeral X indicates the diaper in the deployed state. Shows the full width of.

  The pants-type disposable diaper has a waist region T defined as a front-rear range (a front-rear range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a front-rear direction of a portion forming the leg opening LO. An intermediate region L defined as a range (between the front-rear region having the side seal portion 12A of the front body F and the front-rear region having the side seal portion 12A of the rear body B). The waist area T can be conceptually divided into a “waist portion” W, which conceptually forms the edge of the waist opening, and a “waist lower portion” U, which is a lower portion. Normally, when there is a boundary in the waist circumference region T where the stretching stress in the width direction WD changes (for example, the thickness or elongation rate of the elastic member changes), the waist opening WO side is more waist than the boundary closest to the waist opening WO side. In the case where there is no such a boundary, the waist extending portion 12E which extends toward the waist opening WO side from the absorber 56 or the interior body 200 becomes the waist portion W. The length in the front-rear direction differs depending on the size of the product and can be determined as appropriate. For example, the waist portion W can be 15 to 40 mm, and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the leg of the wearer, and this is a portion where the leg of the wearer is put. As a result, the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.

(Interior body)
The inner body 200 can have any shape, but is rectangular in the illustrated example. As shown in FIGS. 3 to 5, the inner body 200 includes a top sheet 30 on the body side, a liquid impermeable sheet 11, and an absorbing element 50 interposed therebetween. Yes, it is the main body that performs the absorption function. Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbing element 50 in order to promptly transfer the liquid that has passed through the top sheet 30 to the absorbing element 50, and reference numeral 60 denotes the intermediate sheet. Shows rising gathers 60 extending from both sides of the inner body 200 so as to contact around the leg of the wearer in order to prevent excrement from leaking to both sides of the inner body 200.

(Top sheet)
The top sheet 30 has a property of permeating a liquid, and examples thereof include a perforated or non-porous nonwoven fabric and a porous plastic sheet. In addition, the non-woven fabric is not particularly limited in its raw material fiber. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of these. And the like. Further, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods, for example, a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method, and the like. For example, if flexibility and drapability are required, the spun bond method and the spun lace method are bulky and if the softness is required, the air through method, the point bond method, and the thermal bond method are preferred processing methods. .

  Further, the top sheet 30 may be composed of one sheet or a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

  Both sides of the top sheet 30 may be folded back at the side edges of the absorbing element 50, or may protrude laterally from the side edges of the absorbing element 50 without being folded.

  The top sheet 30 may be fixed to a member adjacent to the back side by a joining means using material welding such as heat sealing or ultrasonic sealing or a hot melt adhesive for the purpose of preventing displacement of the top sheet 30 with respect to the back side member. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface.

(Intermediate sheet)
In order to quickly transfer the liquid that has passed through the top sheet 30 to the absorber, an intermediate sheet (also called a “second sheet”) 40 having a higher liquid permeation speed than the top sheet 30 can be provided. The intermediate sheet 40 is provided for quickly transferring the liquid to the absorber to enhance the absorption performance of the absorber and preventing the "return" phenomenon of the absorbed liquid from the absorber. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbonded nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point-bonded nonwoven fabric, and crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a conjugate fiber having a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{17~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw material fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to increase the bulk of the nonwoven fabric, it is also preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers whose center is not at the center, as all or part of the mixed fibers of the raw fibers.

  In the illustrated example, the intermediate sheet 40 is disposed at the center shorter than the width of the absorber 56, but may be provided over the entire width. The length in the front-rear direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbing element 50, or may be within a short range centered on the liquid receiving area.

  The intermediate sheet 40 may be fixed to a member adjacent to the back side by a joining means using material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing displacement of the intermediate sheet 40 with respect to the member on the back side. desirable. In the illustrated example, the intermediate sheet 40 is fixed to the surface of a portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface.

(Liquid impermeable sheet)
Although the material of the liquid impermeable sheet 11 is not particularly limited, for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric having a plastic film on the surface of a nonwoven fabric, a plastic film And a laminated sheet in which a non-woven fabric or the like is overlapped and joined. For the liquid impermeable sheet 11, it is preferable to use a liquid impermeable and moisture permeable material which is preferably used from the viewpoint of preventing stuffiness. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabrics using micro denier fibers, methods such as strengthening leakage prevention by reducing the voids of the fibers by applying heat or pressure, and applying a highly water-absorbent resin or a hydrophobic resin or a water-repellent agent Accordingly, a liquid-impermeable sheet without using a plastic film can be used as the liquid-impermeable sheet 11, but has a sufficient adhesive strength at the time of bonding with a cover nonwoven fabric 13 to be described later via a hot melt adhesive. It is desirable to use a resin film in order to obtain the following.

  The liquid-impermeable sheet 11 has a width that fits on the back side of the absorbing element 50 as shown in the figure, and in order to enhance leakage prevention, the liquid impervious sheet 11 is wrapped around both sides of the absorbing element 50 so as to cover the side of the top sheet 30 of the absorbing element 50. It can also extend to both sides. It is appropriate that the width of the extending portion is about 5 to 20 mm on each of the left and right sides.

  Further, an excretion indicator whose color changes due to the absorption of liquid can be provided inside the liquid impermeable sheet 11, especially on the side surface of the absorber 56.

(Absorption element)
The absorbent element 50 has an absorbent body 56 and a packaging sheet 58 that wraps the absorbent body 56 as a whole. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. Examples of the fiber aggregate include a filament aggregate obtained by spreading a tow (fiber bundle) of synthetic fibers such as cellulose acetate, as necessary, in addition to fibers obtained by stacking short fibers such as cotton-like pulp and synthetic fibers. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately Can be. The fineness of the synthetic fiber is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimp of the crimped fiber can be, for example, about 5 to 75 pieces, preferably about 10 to 50 pieces, more preferably about 15 to 50 pieces per 2.54 cm. Further, crimped fibers uniformly crimped can be used. It is preferable that superabsorbent polymer particles are dispersed and held in the absorber 56.

  The absorber 56 may have a rectangular shape. However, as shown in FIG. 7 and the like, if the absorber 56 has an hourglass shape having a narrowed portion 56N narrower than the front and rear sides at the middle in the front and rear direction, the absorber 56 itself may be used. This is preferable because the fit of the rising gather 60 around the legs is improved.

  The size of the absorber 56 can be appropriately determined as long as it extends in the front-rear and left-right directions of the urination port position. However, it is preferable that the absorber 56 extend in the front-rear direction LD and the width direction WD to the periphery of the inner body 200 or its vicinity. . Reference numeral 56X indicates the entire width of the absorber 56.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or the whole thereof. The superabsorbent polymer particles include “powder” in addition to “particles”. As the superabsorbent polymer particles 54, those used for this type of disposable diaper can be used as they are, for example, by sieving using a standard sieve of 500 μm (JIS Z8801-1: 2006) (shaking for 5 minutes). It is desirable that the ratio of the particles remaining on the top is 30% by weight or less, and the ratio of the particles remaining on the sieve by sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006) is preferable. It is desirably 60% by weight or more.

  The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are preferred. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, starch-acrylonitrile copolymer saponified product, and sodium carboxymethylcellulose crosslinking. Or an acrylic acid (salt) polymer can be used. The shape of the superabsorbent polymer particles is preferably in the form of a commonly used powder, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are suitably used. If the water absorption speed is too slow, the so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 easily occurs.

  As the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even when the bulky absorber 56 is used, the sticky feeling after absorbing the liquid can be effectively suppressed.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be 50 to 350 g / m ² . When the basis weight of the polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. If it exceeds 350 g / m ² , the effect is saturated.

(Packaging sheet)
When the packaging sheet 58 is used, as the material thereof, tissue paper, in particular, crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a sheet having small holes, or the like can be used. However, a sheet from which the superabsorbent polymer particles do not escape is desirable. When a nonwoven fabric is used instead of crepe paper, hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material thereof can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly preferably 10 to 30 g / m ² .

  The packaging structure of the packaging sheet 58 can be determined as appropriate. However, from the viewpoint of ease of manufacturing and prevention of leakage of the highly absorbent polymer particles from the front and rear edges, a tube is formed so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable to wind in a shape, and to make the front and rear edge portions protrude from the front and rear of the absorber 56, and to join the overlapping portion and the overlapping portion of the front and rear protruding portions by a joining means such as hot melt adhesive or material welding.

(Get up gather)
The rising gather 60 has a rising portion 68 that rises from the side of the inner body 200, and the rising portion 68 contacts the range from the groin of the wearer to the buttocks through the leg circumference to prevent side leakage. Things. The rising gather 60 in the illustrated example is such that the root-side portion 60B rises diagonally toward the center in the width direction, and the tip-side portion 60A rises diagonally outward from the middle in the width direction. The present invention is not limited thereto, and appropriate changes can be made, such as the one standing upright on the center side in the width direction as a whole.

  More specifically, the rising gather 60 in the illustrated example folds a band-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the inner body 200 in a width direction WD at a leading end portion and folds the folded sheet into two. A plurality of elongated gather elastic members 63 are fixed at intervals in the width direction WD between the folded portion and the sheet in the vicinity thereof while being extended along the longitudinal direction. A proximal end (an end opposite to the sheet folded portion in the width direction WD) of the rising gather 60 opposite to the distal end is fixed to a side of the inner body 200 on the back side of the liquid impermeable sheet 11. A portion other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65. Further, the main body portion 66 has a root portion 60B extending toward the center in the width direction, and a distal portion 60A that is folded back at the tip of the root portion 60B and extends outward in the width direction. The front and rear ends of the main body portion 66 are in a laid state, and are formed as the laid down portions 67 fixed to the side surface of the top sheet 30, while the middle portion in the front and rear direction located therebetween is not fixed. A raised elastic member 63 along the front-rear direction LD is fixed to at least the distal end of the raised portion 68 in an extended state.

  In the rising gather 60 configured as described above, the rising portion 68 rises by the contraction force of the gather elastic member 63 so as to come into contact with the skin as shown by the arrow in FIG. In particular, when the base portion 65 is located on the back side of the inner body 200, the rising portion 68 stands up so as to open outward in the width direction in the crotch portion and the vicinity thereof, so that the rising gathers 60 abut against the leg circumference. And the fit is improved.

  Like the rising gather 60 in the illustrated example, the main body portion 66 is formed by a base portion 60B extending toward the center in the width direction, and a bent portion bent at the tip of the base portion 60B and extending toward the outside in the width direction. In the structure, the tip side portion 60A and the base side portion 60B are joined in the fall state at the fall section 67, and the base section 60B is joined to the top sheet 30 in the fall state. The joining of the opposing surfaces in the falling part 67 can be performed by at least one of a hot melt adhesive by various coating methods and a material welding method such as heat sealing or ultrasonic sealing. In this case, the joining of the root portion 60B and the top sheet 30 and the joining of the distal portion 60A and the root portion 60B may be performed by the same means or by different means. For example, it is preferable to join the root portion 60B and the top sheet 30 with a hot melt adhesive, and to join the tip portion 60A and the root portion 60B with material welding.

The gather sheet 62 may be made of a spunbonded nonwoven fabric (SS, SSS, etc.), an SMS nonwoven fabric (SMS, SSMSS, etc.), a soft nonwoven fabric having excellent uniformity and concealing properties such as a melt blown nonwoven fabric. What has been subjected to the treatment can be suitably used. In this case, the basis weight of the nonwoven fabric is preferably about 10 to 30 g / m ² . A thread rubber or the like can be used as the gather elastic member 63. When using spandex thread rubber, the thickness is preferably 470 to 1240 dtex, and more preferably 620 to 940 dtex. The elongation percentage of the gathered elastic member 63 in the attached state is preferably 150 to 350%, more preferably 200 to 300%. The number of the gather elastic members 63 is preferably 2 to 6, more preferably 3 to 5. The arrangement interval 60d of the gather elastic members 63 is preferably 3 to 10 mm. With this configuration, it is easy to hit the skin in the area where the gather elastic members 63 are arranged. The gather elastic members 63 may be arranged not only on the tip side but also on the base side.

  In the rising portion 68 of the rising gather 60, a hot-melt adhesive, a heat seal, an ultrasonic wave, etc. by various coating methods are used for bonding the inner layer and the outer layer of the gather sheet 62 and fixing the gather elastic member 63 sandwiched therebetween. At least one of fixing means by welding a material such as a seal can be used. If the entire surfaces of the inner layer and the outer layer of the gather sheet 62 are bonded together, the flexibility is impaired. Therefore, it is preferable that the portion other than the bonding portion of the gather elastic member 63 is not bonded or is weakly bonded. In the illustrated example, the hot melt adhesive is applied only to the outer peripheral surface of the gather elastic member 63 by applying means such as a comb gun or a shrink wrap nozzle, and the hot melt adhesive is applied between the inner layer and the outer layer of the gather sheet 62 so that the gather elastic member 63 is formed. Only the hot melt adhesive applied to the outer peripheral surface of the gather sheet 62 fixes the gather elastic member 63 to the inner layer and the outer layer of the gather sheet 62 and fixes the inner layer and the outer layer of the gather sheet 62. I have.

  Similarly, for fixing the laid-down portion 67, at least one of a hot melt adhesive by various coating methods and a material welding method such as heat sealing or ultrasonic sealing can be used.

(Side gather)
Side flap portions 70 extending to the side of the absorber 56 are provided on both side portions of the interior body 200, and side gathers SG are formed in the side flap portions 70. That is, the side flap portion 70 includes one or a plurality of elongated side elastic members 73 provided along the front-back direction LD and spaced apart from each other, and the first sheet facing the outside of the side elastic members 73. It has a layer 71 and a second sheet layer 72 facing the inside of the side elastic member 73.

  The sheet material forming the first sheet layer 71 and the second sheet layer 72 is not particularly limited, and an appropriate nonwoven fabric such as the nonwoven fabric usable in the rising gathers 60 and the exterior bodies 12F and 12B can be selected. . In the examples shown in FIGS. 3, 4, and 11, the first sheet layer 71 and the second sheet layer 72 are formed by extending the gather sheet 62 of the rising gather 60 as described later. As shown in FIGS. 9, 10, and 12, the side flap portion 70 may be constructed by adding a dedicated sheet material 79 different from the rising gathers 60. In the former case, the front and rear ends of the side flap portions 70 coincide with the front and rear ends of the rising gathers 60 (that is, in this case, the front and rear ends of the interior body 200), but in the latter case, the front and rear ends of the side flap portions 70 rise. May be located on the center side in the front-rear direction from the front-rear end.

  The side elastic member 73 is not particularly limited, and an elongated elastic member similar to the gather elastic member 63 described above can be used. The elongation ratio of the side elastic member 73 in the attached state is preferably 150% to 350%, and more preferably 200% to 270%. The number of the side elastic members 73 is preferably 2 to 16, more preferably 6 to 10. An appropriate interval between the side elastic members 73 is 5 to 10 mm.

  The side elastic member 73 is fixed to the first sheet layer 71 and the second sheet layer 72. For bonding the first sheet layer 71 and the second sheet layer 72 and fixing the side elastic member 73 sandwiched therebetween, material welding such as hot melt adhesive HM by various coating methods, heat sealing, ultrasonic sealing, or the like. Can be used. If the bonding area between the first sheet layer 71 and the second sheet layer 72 is large, the flexibility is impaired. Therefore, it is preferable that the portions other than the bonding portions of the side elastic members 73 are not bonded or are weakly bonded. In the illustrated example, the hot melt adhesive HM is applied only to the outer peripheral surface of the side elastic member 73 by applying means such as a comb gun or a shrink wrap nozzle, and is sandwiched between the first sheet layer 71 and the second sheet layer 72. The fixing of the side elastic member 73 to the first sheet layer 71 and the second sheet layer 72 and the first sheet layer 71 and the second sheet layer only by the hot melt adhesive HM applied to the outer peripheral surface of the side elastic member 73. The structure for fixing between the 72 is provided.

  The attachment range of the side elastic member 73 in the front-rear direction, that is, the range in the front-rear direction in which the side gather SG is formed can be determined as appropriate, but is equal to or larger than the range in the front-rear direction of the non-joining portion 77 described later. It is preferably within the range.

  The side flap portion 70 has three or more sheet layers including the first sheet layer 71 and the second sheet layer 72. That is, in addition to the innermost sheet layer 74 and the outermost sheet layer 75, at least one inner sheet layer 76 located therebetween is provided. Some or all of these sheet layers may be formed of separate sheet materials, respectively, or one sheet material may be formed by turning once or a plurality of times. The inner sheet layer 76 can be appropriately selected from the above-described gather sheet 62, the liquid-impermeable sheet 11, or the same nonwoven fabric as the exterior bodies 12F and 12B described later. The liquid impermeable sheet 11 can be formed by appropriately extending or folding the sheet.

  The side flap portion 70 has a non-joined portion 77 in which at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined. In addition, the non-joined portion 77 continuously or intermittently continues in the front-rear direction LD in the width direction WD including a region between the side elastic member 73 located at the side most and the side edge of the side flap portion 70. Part. In other words, as long as one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 that overlaps the back of the non-joined portion 77 are not joined, a part or all of the other layers are separated. May be bonded, or all the sheet layers in the thickness direction may be non-bonded. For example, in the non-joined portion 77 of the example shown in FIGS. 3, 4, and 11, the portion where the innermost sheet layer 74 and the inner sheet layer 76 that overlaps the innermost sheet layer 74 are not joined is the portion closest to the side edge from the side edge. Until the side elastic member is fixed, the portion where the outermost sheet layer 75 and the inner sheet layer 76 that overlaps the outermost sheet layer 75 are not joined continues to the center in the width direction. In the non-joined portion 77 of the example shown in FIGS. 9, 10, and 12, a portion where the innermost sheet layer 74 and the inner sheet layer 76 overlapping the backside are not joined, and the outermost sheet layer 75 and the backside thereof. The portion that is not bonded to the inner sheet layer 76 that overlaps with the inner side continues from the side edge to the center in the width direction from the fixing position of the side elastic member on the side, but the former is closer to the center in the width direction. To continue.

  The dimension of the non-joined portion 77 in the width direction WD can be appropriately determined, but is preferably 2 to 15 mm, and particularly preferably 5 to 10 mm. Further, the dimension of the non-joined portion 77 in the front-back direction LD is preferably 30% or more, particularly preferably 40% or more of the product overall length Y. Further, in the case of a pants-type disposable wearing article in which the front exterior body 12F and the rear exterior body 12B are separated as in the illustrated example, the non-bonded portion 77 extends to a position overlapping with the front exterior body 12F and the rear exterior body 12B, respectively. Is preferred. In this case, it is preferable that the non-joined portion 77 extends over the entire longitudinal direction LD of the interior body 200. Further, the non-joined portion 77 extends only to a position between the front and rear edges of the interior body 200 and the elastic members 16 and 19 of the front exterior body 12F and the rear exterior body 12B that are closest to the leg openings LO. Is also preferred. Further, the non-joined portion 77 is formed between the elastic members 16 and 19 of the front exterior body 12F and the rear exterior body 12B that are closest to the leg opening LO and the edge of the leg opening LO (the rear edge of the front exterior body 12F and the front edge of the rear exterior body 12B). It may be extended only to a position between the edge and the edge.

  The gap between at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 that overlaps the back is closed on both sides in the width direction WD of the non-joined portion 77. As shown in the illustrated example, one side of the gap of the non-joined portion 77 is closed by folding the sheet material forming the innermost sheet layer 74 or the outermost sheet layer 75 at the side edge of the side flap portion 70, and the other side. Can be closed by bonding the sheet layers adjacent in the thickness direction at appropriate locations using a hot melt adhesive HM, welding means, or the like. Of course, both sides of the gap of the non-joined portion 77 can be closed in the same manner, for example, by folding the sheet material or by using the hot melt adhesive HM.

  In the pants-type disposable diaper, the side flap portion 70 contracts in the front-rear direction LD with the contraction of the side elastic member 73, and as shown in FIG. Is formed. That is, the folds of the side gathers SG are formed in a portion including the non-joined portion 77 in the side flap portion 70 in the front-back direction LD. Here, the non-joined portion 77 is a portion where at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined, and the gap between the sheet layers is , The non-joined portion 77 is closed on both sides in the width direction WD. In addition, the non-joined portion 77 has a width direction WD range including a region between the side elastic member 73 located at the side most side and the side edge of the intermediate region L (the same or more than the width direction WD in the width direction WD). (Range) and continues in the front-rear direction LD. That is, a hollow portion 77s surrounded by the sheet layer follows the non-joined portion 77 in the front-back direction LD. As a result, the fold formed in the non-joined portion 77 is formed by at least one of the innermost sheet layer 74 and the outermost sheet layer 75 swelling greatly, and is greatly soft (that is, rich in cushioning properties). Become. Therefore, since the large soft folds are formed inside, outside, inside and outside both sides, or in the entire thickness direction of the range including the side edge of the side flap portion 70, the feel of the end of the leg opening LO becomes good. .

  The side elastic member 73 may be located in the vicinity of the side edge of the side flap portion 70. However, the side elastic member 73 extends from the side edge to the center of the side flap portion 70 in the width direction WD by 2 to 15 mm (particularly 5 to 10 mm). It is preferable that the portion does not include the side elastic member 73 and includes a part or all of the non-joined portion 77. As described above, when the side elastic member 73 is sufficiently separated from the side edge of the side flap portion 70 and the separated portion includes a part or the entirety of the non-joined portion 77, the product is held by hand at the time of mounting or purchase. A large fold rich in flexibility and cushion is formed in the entire thickness direction on the side of the portion pressed against the skin (that is, the portion having the side elastic member 73) when or during wearing, so that the end of the leg opening LO is formed. It is particularly preferred for improving the feel of the part.

  The positional relationship between the non-joined portion 77 and the side elastic member 73 can be appropriately determined. However, as shown in the illustrated example, when the non-joined portion 77 has at least one side elastic member 73 at a position overlapping the thickness direction. This is preferable because the contraction force of the side elastic member 73 is directly applied to the non-joined portion 77, and the fold shape in the non-joined portion 77 is highly maintained.

  In the non-joined portion 77, the inner sheet layer 76 that overlaps the innermost sheet layer 74 or the outermost sheet layer 75 may be fixed to the oppositely adjacent sheet layer as shown in FIG. Good (the first sheet layer 71 and the second sheet layer 72 in the illustrated example are adhered to each other with a hot melt adhesive HM), but as shown in FIG. 11, the inner sheet layer 76 is adjacent to both sides in the thickness direction. It is particularly preferred that it is non-fixed to the layer. Accordingly, the inner sheet layer 76 is independently formed with a fold due to the contraction force of the side elastic member 73. In other words, the large folds formed on the side flap portions 70 are supported by the folds of the inner sheet layer 76 independently formed inside the side flap portions. Will be formed.

  As shown in the illustrated example, the side flap portion 70 has a folded sheet layer folded at the side edge of the side flap portion 70, and the innermost sheet layer 74 and the outermost sheet layer 75 of the side flap portion 70. It is preferable that at least one of the two is a portion on one side of the folded position of the folded sheet layer because the cushioning property of the fold formed in the non-joined portion 77 is particularly improved by the restoring force against the folding. The folded sheet layer means a pair of layers formed by folding the sheet material.

  One preferred example is the structure shown in FIG. The side flap portion 70 has a double folded sheet layer folded at its side edge. The innermost sheet layer 74 and the outermost sheet layer 75 of the non-joined portion 77 are an inner portion and an outer portion with respect to the folding position of the outer folded sheet layer, respectively. The layer 76 includes an inner portion and an outer portion with respect to the folding position of the folded sheet layer located inside. In addition, the first sheet layer 71 and the second sheet layer 72 are each an inner portion with the folding position of the folded sheet layer located inside, and an outer portion with the folding position of the folded sheet layer located outside sandwiched. Contains. Further, the non-joined portion 77 is formed by joining a portion outside the folding position of the folded sheet layer located outside and a portion outside the folding position of the folded sheet layer located inside to the outside. Contains. In this structure, by arranging the double folded sheet layers, two sheet layers other than the first sheet layer 71 and the second sheet layer 72 can be formed, and each of them has a restoring force against the folding. Therefore, folds having better cushioning properties are formed on the side flap portions 70 with less sheet material.

  Another preferred example is the structure shown in FIG. The side flap portion 70 has a double folded sheet layer folded at its side edge, and the first sheet layer 71 and the second sheet layer 72 are respectively folded at the folding positions of the folded sheet layers located inside. , And includes a portion on one side and a portion on the other side (that is, the first sheet layer 71 and the second sheet layer 72 are both internal sheet layers 76). In addition, the innermost sheet layer 74 and the outermost sheet layer 75 in the non-joined portion 77 are a part on one side and a part on the other side with respect to the folding position of the folded sheet layer located outside. The non-joined portion 77 includes a portion where the innermost sheet layer 74 and the first sheet layer 71 overlapping the back thereof are not joined, and an outermost sheet layer 75 and the second sheet layer 72 overlapping the back thereof. Are not joined. In this structure, the folds formed in the non-joined portion 77 are formed on at least the inner and outer sides of the range including the side edge of the intermediate region L, so that the inner and outer surfaces of the end of the leg opening LO have a good touch. . Further, since the innermost sheet layer 74 and the outermost sheet layer 75 are a part on one side and a part on the other side with respect to the folding position of the folded sheet layer located on the outside, the non-return force causes the non-return force. The cushioning property of the fold formed at the joint portion 77 is particularly high.

  When the non-joined portion 77 has a four-layer structure as in these examples, it is preferable to construct the side flap portion 70 using the rising gather 60 sheet as in the example shown in FIG. That is, the folded sheet layer of the side flap portion 70 includes a first portion P1 formed by extending the two-layer structure of the rising gather 60 sheet from the base point of the rising gather 60 to the side edge of the side flap portion 70; The two-layer structure of the gather 60 sheet can be formed by the second portion P2 that is folded back at the side edge of the side flap portion 70 and extends toward the center in the width direction WD.

(Exterior)
The exterior bodies 12F and 12B include a rectangular front exterior body 12F that constitutes at least a waist part of the front body F, and a rectangular rear exterior body 12B that constitutes at least a waist part of the back body B. The front exterior body 12F and the rear exterior body 12B are not continuous on the crotch side, but are separated in the front-back direction LD (exterior two-split type). The distance in the front-rear direction can be, for example, about 40 to 60% of the total length Y. In the illustrated example, the lower edges of the front exterior body 12F and the rear exterior body 12B are linear along the width direction WD, but at least one lower edge of the front exterior body 12F and the rear exterior body 12B extends around the leg. Such a curved shape may be used. In addition, as shown in FIG. 8, the exterior body 12 may be an integral body that continuously passes through the crotch from the front body F to the back body B (exterior integrated type).

  The exterior bodies 12F and 12B have a waist portion which is a front-back direction range corresponding to the waist region T. Also, in this example, the front exterior body 12B has a longer dimension in the front-rear direction than the front exterior body 12F, and the front exterior body 12F does not have a portion corresponding to the intermediate region L. The body 12B has a buttock cover portion C extending from the waistline region T to the intermediate region L side. Although not shown, the front exterior body 12F is also provided with a groin cover portion extending from the waist circumference region T to the intermediate region L side, or a structure in which a groin cover portion is provided but a buttock cover portion is not provided, or the front exterior body 12F and It is not necessary to provide a portion corresponding to the intermediate region L on both the rear exterior body 12B.

  As shown in FIGS. 4 and 5, the exterior bodies 12F and 12B are formed of a first sheet material 12S and a second sheet material 12H, and an elastic member provided between two or more sheet layers formed by the first sheet material 12S and the second sheet material 12H. 15 to 19. Each sheet layer can be a single sheet material or individual sheet materials. That is, in the former case, in a part or the whole of the exterior body, an inner portion and an outer portion of one sheet material folded at an appropriate position such as an edge of the waist opening WO or an edge on the side of the leg opening LO. Elastic members 15 to 19 can be provided between them. In the illustrated example, the waist portion W and the lower end portion each have a portion including a folded sheet material. For example, in the waist portion W, the second sheet material 12H extends only to the edge of the waist opening WO, but the first sheet material 12S goes around the waist-side edge of the second sheet material 12H and is inside the waist portion. Is folded back. The folded portion is a cover sheet layer 12r that extends over the entire width of the exterior body up to a position overlapping the end of the interior body 200 on the waist opening WO side. The cover sheet layer 12r may be formed by attaching a dedicated sheet material without forming the first sheet material 12S by folding it.

  Elastic members 15 to 19 are incorporated in the exterior bodies 12F and 12B to enhance the fit around the wearer's torso, and an elastic region A2 that elastically expands and contracts in the width direction WD with expansion and contraction of the elastic members is formed. ing. In the stretchable region A2, the exterior bodies 12F and 12B contract with the contraction of the elastic member in a natural length state, forming wrinkles or folds, and when extending in the longitudinal direction of the elastic member, extend completely without wrinkles. Elongation is possible up to a predetermined elongation rate. As the elastic members 15 to 19, besides an elongated elastic member (illustrated example) such as thread rubber, a known elastic member such as a band, a net, or a film can be used without any particular limitation. As the elastic members 15 to 19, synthetic rubber or natural rubber may be used.

The elastic members 15 to 19 in the illustrated example will be described in more detail. A plurality of waist elastic members 17 are arranged at waist portions W of the exterior bodies 12F and 12B in the front-rear direction so as to be continuous over the entire width direction WD. It is mounted empty. In the waist elastic member 17, one or more of the waist elastic members 17 arranged in the region adjacent to the lower waist portion U may overlap with the inner body 200, or may be located at the center in the width direction overlapping with the inner body 200. May be provided on both sides in the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber; in the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1.0 mm). ^It is preferable to provide about 2 to 15, especially about 4 to 10 thread rubbers at an interval of 2 to 12 mm, particularly at an interval of 3 to 7 mm, thereby extending the waist W in the width direction WD. The ratio is preferably about 150 to 400%, particularly about 220 to 320%. Further, the waist portion W does not need to use the waist elastic member 17 having the same thickness in all the longitudinal directions LD or to have the same elongation rate. The sheath elongation rate may be different.

Further, it is preferable that a plurality of lower waist elastic members 15 and 19 made of an elongated elastic member are attached to the lower waist portion U of the exterior bodies 12F and 12B at intervals in the front-rear direction. The waist lower elastic members 15 and 19 have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber; in the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1). the rubber thread .0mm about ^2), 1 to 15 mm, particularly preferably to dispose 5-30 present at intervals of 3 to 8 mm, this elongation in the width direction WD of the waist lower portion U by 200 to 350% In particular, it is preferably about 240 to 300%.

It is preferable that a cover elastic member 16 made of an elongated elastic member is attached to the buttocks cover C of the rear exterior body 12B. The buttocks cover C is contracted toward the center in the width direction WD by the cover elastic member 16. The cover elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber; in the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1.0 mm). ^It is preferable to provide a thread rubber of about ² ), and the elongation rate of the buttocks cover portion C in the width direction WD is preferably 150 to 300%, particularly preferably 180 to 260%.

  On the other hand, when the groin cover is provided on the front exterior body 12F, a cover elastic member can be provided similarly to the buttocks cover C.

  When the elastic members 15, 16, and 19 are provided in the front-rear direction range having the absorber 56 like the lower waist portion U and the buttocks cover portion C of the illustrated example, the width direction of the absorber 56 is partially or entirely provided. In order to prevent the WD from shrinking, the middle in the width direction (preferably including the entirety of the inner and outer joints 201 and 202) including part or all of the portion overlapping the absorber 56 in the width direction WD is defined as the non-stretchable region A1. , Both sides in the width direction are the elastic areas A2. It is preferable that the waist portion W be an elastic region A2 over the entire width direction WD. However, like the waist lower portion U, a non-elastic region A1 may be provided at the middle in the width direction.

  The elastic members 15, 16, and 19 are fixed with the hot melt adhesive at least at both ends in the elastic region A2 of the elastic regions A2 and the non-elastic regions A1 at the time of manufacturing the exterior bodies 12F and 12B. The elastic members 15, 16, and 19 are not fixed in the region that becomes the non-stretchable region A1, but are cut at one position in the middle in the width direction by pressurization and heating, or are formed in the region that becomes the non-stretchable region A1. , And can be constructed by killing the elasticity in the non-stretchable area A1 while leaving the elasticity in the elastic area A2. In the former case, as shown in FIG. 4, in the non-stretchable region A1, the remaining cutting portion continuous from the elastic members 15, 16, 19 in the stretchable region A2 is shrunk to the natural length as an unnecessary elastic member 18 by itself. In the latter case, although not shown in the figure, in the case of the latter, the cutting remaining part continuous from the elastic members 15, 16, 19 of the elastic region A2 and the elastic members 15, 16, 19 of both elastic regions A2 are not shown. The cut piece of the discontinuous elastic member remains as an unnecessary elastic member in the exterior bodies 12F and 12B in a state of contracting to the natural length by itself.

The first sheet material 12S and the second sheet material 12H can be used without any particular limitation, but are preferably non-woven fabrics. For example, olefin-based such as polyethylene and polypropylene, polyester-based and polyamide-based synthetic fibers, and two or more kinds of these. Can be used. Further, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods, for example, a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method, and the like. When a nonwoven fabric is used, the basis weight per sheet is preferably about 10 to 30 g / m ² .

  The elastic members 15 to 19 are fixed to the exterior bodies 12F and 12B by hot melt adhesives HM by various coating methods. A pair of facing sheet layers formed by the first sheet material 12S and the second sheet material 12H have a portion having the elastic members 15 to 19, respectively, by a hot melt adhesive HM for fixing the elastic members 15 to 19. It is preferable to join them, and in a portion not having the elastic members 15 to 19, they may be joined by hot melt adhesive HM, or may be joined by material welding such as heat sealing or ultrasonic sealing, or part or all. Need not be adhered. In the portions having the elastic members 15 to 19 in the exterior bodies 12F and 12B in the illustrated example, the hot melt adhesive HM is applied only to the outer peripheral surfaces of the elastic members 15 to 19 by applying means such as a comb gun or a shrink wrap nozzle. The fixing of the elastic members 15 to 19 to both sheet layers and the fixing between both sheet layers are performed only by the hot melt adhesive HM applied to the outer peripheral surfaces of the elastic members 15 to 19. The elastic members 15 to 19 may be fixed to both sheet layers only at both ends in the expansion and contraction direction in the expansion and contraction region A2.

(Lower edge gather)
As shown in FIGS. 1, 2, 5, 6, and 13, in the pants-type disposable diaper, the upper edges of the leg openings LO are on both sides of the inner body 200 in the front outer body 12 </ b> F and the rear outer body 12 </ b> B. Is the lower edge of the wing region J extending to the right. The lower end portion 80 of the wing region J faces one or a plurality of elongated lower end elastic members 83 provided along the width direction WD and spaced apart from each other, and faces the inside of the lower end elastic member 83. It has a first sheet layer 81 and a second sheet layer 82 facing the outside of the lower end elastic member 83.

  In the example shown in FIGS. 5 and 13, the above-mentioned second sheet material 12H is folded outward at the edge of the leg opening LO, and the portion outside the folding position becomes the first sheet layer 81, and the portion inside the folding position is inside. The portion is the second sheet layer 82. Instead, the first sheet material 12S is folded at the edge of the leg opening LO to form the first sheet layer 81 and the second sheet layer 82, or one of the first sheet material 12S and the second sheet material 12H. Thus, the first sheet layer 81 is formed, and the second sheet layer 82 is formed on the other side. Instead of using the first sheet material 12S and the second sheet material 12H as the first sheet layer 81 and the second sheet layer 82, the sheet material forming the first sheet layer 81 and the second sheet layer 82 is replaced with the exterior body 12F. , 12B, and a suitable non-woven fabric such as the non-woven fabric that can be used in the rising gathers 60 and the exterior bodies 12F, 12B can be selected as the sheet material.

  In the illustrated example, the lower end elastic member 83 is the above-described lower waist elastic member 19 in the front exterior body 12F and the above-described cover elastic member 16 in the rear exterior body 12B, but is not limited thereto. However, it is also possible to provide a dedicated elastic member which differs from these materials in terms of material, elongation ratio, arrangement, and the like. The extension ratio of the lower end elastic member 83 in the attached state is preferably 200 to 350%, more preferably 240 to 300%. An appropriate interval between the lower end elastic members 83 is 5 to 10 mm.

  The lower end elastic member 83 is fixed to the first sheet layer 81 and the second sheet layer 82. For bonding the first sheet layer 81 and the second sheet layer 82 and fixing the lower end elastic member 83 sandwiched therebetween, a material such as a hot melt adhesive HM, a heat seal, an ultrasonic seal, or the like by various application methods. Fixing means by welding can be used. If the bonding area of the first sheet layer 81 and the second sheet layer 82 is large, the flexibility is impaired. Therefore, it is preferable that the portions other than the bonding portion of the lower end elastic member 83 are not bonded or are weakly bonded. In the illustrated example, the hot melt adhesive HM is applied only to the outer peripheral surface of the lower end elastic member 83 by applying means such as a comb gun or a shrink wrap nozzle and is sandwiched between the first sheet layer 81 and the second sheet layer 82. The fixing of the lower end elastic member 83 to the first sheet layer 81 and the second sheet layer 82 only with the hot melt adhesive HM applied to the outer peripheral surface of the lower end elastic member 83, and the first sheet layer 81 and the The structure is such that bonding between the two sheet layers 82 is performed. In addition, if the bonding between the first sheet layer 81 and the second sheet layer 82 is insufficient only by using the hot melt adhesive HM applied to the outer peripheral surface of the lower end elastic member 83, The hot melt adhesive HM can be appropriately added to a portion not having the elastic member 83.

  The attachment range of the lower end elastic member 83 in the width direction, that is, the range in the width direction WD where the lower end gathers UG are formed can be appropriately determined. When the non-stretchable region A1 is provided as in the illustrated example, the lower end elastic member 83 may be provided only on both sides of the non-stretchable region A1 in the width direction WD. In the middle part of the above, the elasticity may be killed by cutting.

  The lower end portion 80 of the wing region J has three or more sheet layers including the first sheet layer 81 and the second sheet layer 82. That is, in addition to the innermost sheet layer 84 and the outermost sheet layer 85, at least one inner sheet layer 86 located therebetween is provided. Some or all of these sheet layers may be formed of separate sheet materials, respectively, or one sheet material may be formed by turning once or a plurality of times. The inner sheet layer 86 may be formed by directly or appropriately folding the first sheet material 12S and the second sheet material 12H, or by adding a dedicated sheet material to the lower ends 80 of the exterior bodies 12F and 12B. It may be formed. As the dedicated sheet material in the latter case, an appropriate nonwoven fabric such as the nonwoven fabric usable in the rising gathers 60 and the exterior bodies 12F and 12B can be selected.

  The lower end portion 80 of the wing region J has a non-joined portion 87 in which at least one of the innermost sheet layer 84 and the outermost sheet layer 85 and the inner sheet layer 86 overlapping the back thereof are not joined. In other words, as long as one of the innermost sheet layer 84 and the outermost sheet layer 85 and the inner sheet layer 86 overlapping the back thereof are not bonded, the non-joined portion 87 is partially or entirely in the other layers. May be bonded, or all the sheet layers in the thickness direction may be non-bonded.

  The non-joined portion 87 is a portion that continuously or intermittently continues in the width direction WD in the front-rear direction LD range including a region between the lowermost elastic member 83 located at the lowest position and the lower edge of the wing region J. is there. The dimension of the non-joined portion 87 in the front-rear direction LD can be appropriately determined, but is preferably 2 to 15 mm, and particularly preferably 5 to 10 mm. Further, the dimension of the non-joined portion 87 in the width direction WD is preferably 50% or more, particularly preferably 90% or more of the dimension of the wing region J in the width direction WD.

  In particular, in the case of a pants-type disposable wearing article having a non-stretchable area and a non-stretchable area as shown in the illustrated example, the laminated structure of the wing area (including the non-joined portion) is provided over the entire width of the product. Alternatively, it may be provided only in the stretchable region.

  Further, the gap between at least one of the innermost sheet layer 84 and the outermost sheet layer 85 and the inner sheet layer 86 overlapping the back of the non-joined portion 87 is closed on both sides of the non-joined portion 87 in the front-rear direction LD. Part. As in the illustrated example, one side of the gap of the non-joined portion 87 is closed by folding the sheet material forming the innermost sheet layer 84 or the outermost sheet layer 85 at the lower edge of the wing region J, and the other side is closed. The sheet can be closed by appropriately bonding the sheet layer using a hot melt adhesive HM or a welding means. Of course, both sides of the gap of the non-joined portion 87 can be closed in the same manner, for example, by folding back the sheet material or using the hot melt adhesive HM. In the lower end portions 80 of the exterior bodies 12F and 12B in the examples shown in FIGS. 13 and 14, the outermost sheet layer 85 has a portion that is not bonded to the inner sheet layer 86 that overlaps the back side thereof. Since the gap is not closed on the lower side, the gap is not a non-joined portion 87 closed on both sides in the front-rear direction LD, and a fold excellent in cushioning property described later is not formed.

  As can be understood from the above description, for example, in the non-bonded portion 87 in the example shown in FIG. 13, the portion where the innermost sheet layer 84 and the inner sheet layer 86 overlapping the back thereof are not bonded is the outer sheet 12F, 12B. This is a portion that continues from the lower edge to the lowermost lower end elastic member 83 fixing position. The non-joined portion 87 in the example shown in FIG. 14 and the example shown in FIG. 15 is such that a portion where the innermost sheet layer 84 and the inner sheet layer 86 overlapping the back thereof are not joined is below the exterior bodies 12F and 12B. This is a portion that continues from the edge to the upper edge of the inner sheet layer 86. In the non-joined portion 87 of the example shown in FIG. 16, the portion where the outermost sheet layer 85 and the inner sheet layer 86 that overlaps the outermost sheet layer 85 are not joined is the lowermost lower end from the lower edges of the exterior bodies 12F and 12B. The portion where the innermost sheet layer 84 and the inner sheet layer 86 overlapping the back of the inner sheet layer 84 are not joined to the fixing position of the outer elastic member 83 is from the lower edge of the exterior bodies 12F and 12B to the upper edge of the inner sheet layer 86. It is the part that continues to.

  In this disposable wearing article, as shown in FIG. 6, the lower end 80 of the wing region J contracts in the width direction WD with the contraction of the lower end elastic member 83, and the non-joined portion 87 at the lower end 80 of the wing region J A lower end 80 gather is formed in a portion including the lower end. In other words, the folds of the lower end portion 80 gathers are formed in the lower end portion 80 of the wing region J at the portion including the non-joined portion 87 in the width direction WD. Here, the non-joined portion 87 is a portion where at least one of the innermost sheet layer 84 and the outermost sheet layer 85 and the inner sheet layer 86 overlapping the back thereof are not joined, and the gap between the sheet layers is Are closed on both sides in the front-rear direction LD of the non-joined portion 87. In addition, the non-joined portion 87 has a front-rear direction LD range including the region between the lowermost elastic member 83 located at the lowest position and the lower edge of the wing region J (the front-rear direction LD equal to or larger than the region). Range) and continues in the width direction WD. In other words, a hollow portion surrounded by the sheet layer continues in the non-joined portion 87 in the width direction. As a result, the folds formed in the non-joined portion 87 are formed by at least one of the innermost sheet layer 84 and the outermost sheet layer 85 swelling greatly, and are largely soft (that is, rich in cushioning properties). Become. Therefore, since this large soft fold is formed inside, outside, inside and outside both sides, or in the entire thickness direction of the range including the lower edge of the wing region J, the end of the leg opening LO in the exterior bodies 12F and 12B is formed. The feel is good.

  The lower end elastic member 83 may be located in the vicinity of the lower edge of the wing region J, but the portion from the lower edge of the wing region J to the center side in the front-rear direction LD from 2 to 15 mm (particularly 5 to 10 mm). , It is preferable not to include the lower end elastic member 83 and to include a part or the whole of the non-joined portion 87. As described above, when the lower end elastic member 83 is sufficiently separated from the lower edge of the wing region J, and the separated portion includes part or all of the non-joined portion 87, the product is held by hand at the time of mounting or purchase. Since a large fold rich in flexibility and cushion is formed in the entire thickness direction below the portion pressed against the skin when the user wears or wears (ie, the portion having the lower end elastic member 83), the end of the leg opening LO It is particularly preferred for improving the feel of the part.

  Although the positional relationship between the non-joined portion 87 and the lower end elastic member 83 can be appropriately determined, as shown in the illustrated example, at least one lower end elastic member 83 is provided at a position overlapping the non-joined portion 87 in the thickness direction. This is preferable because the contraction force of the lower end elastic member 83 is directly applied to the non-joined portion 87, and the fold shape of the non-joined portion 87 is highly maintained.

  In the non-joined portion 87, as shown in FIGS. 13 and 14, the inner sheet layer 86 may be fixed to the sheet layer adjacent to one side in the thickness direction, but as shown in FIGS. It is also preferable that the sheet is not fixed to the sheet layers adjacent on both sides in the thickness direction. As a result, the inner sheet layer 86 is independently formed with folds by the contraction force of the lower end elastic member 83. In other words, since the large folds formed at the lower end portion 80 of the wing region J are supported by the folds of the inner sheet layer 86 independently formed inside the folds, the folds having more excellent cushioning properties are formed. J is formed at the lower end 80.

  As in the example shown in FIGS. 13 to 15, the second sheet material 12H is folded back to the side having the lower end elastic member 83 at the portion forming the innermost sheet layer 84 and the lower edge of the wing region J. And a portion forming the inner sheet layer 86, and it is preferable that at least a part of the portion forming the inner sheet layer 86 is joined to the first sheet material 12S. Conversely, the first sheet material 12S has a portion that forms the outermost sheet layer 85 and a portion that forms the inner sheet layer 86 that is folded at the lower edge of the wing region J toward the side having the lower end elastic member 83. And at least a part of the portion forming the inner sheet layer 86 may be joined to the second sheet material 12H (not shown). The joining between the inner sheet layer formed by folding one of the first sheet material 12S and the second sheet material 12H and the other sheet material is performed by elasticity of the lower end portion as shown in FIG. The hot melt adhesive HM for fixing the member 83 may be used, or the hot melt adhesive HM may be separately applied as shown in FIGS. Also, as shown in FIGS. 13 and 14, the joining position is separated from the lower edge of the wing region J by a certain amount (for example, about 5 to 10 mm) from the lower edge, as in the example shown in FIGS. It may be near the lower edge of the wing region J. In this structure, the inner sheet layer 86 can be formed by the sheet material forming one of the first sheet layer 81 and the second sheet layer 82 sandwiching the lower end elastic member 83, and the innermost sheet layer 84. Alternatively, since the portion forming the outermost sheet layer 85 has a restoring force against folding back of the portion forming the inner sheet layer 86, the folds having more cushioning properties with less sheet material are formed at the lower end 80 of the wing region J. Is formed.

  The example shown in FIG. 16 is also preferable. In this structure, the first sheet material 12S and the second sheet material 12H have a folded portion that is folded inward at the lower edge of the wing region J. The outermost sheet layer 85 has a portion on one side and a portion on the other side with respect to the folding position of the first sheet material 12S, and the innermost sheet layer 84 has a folding position on the second sheet material 12H. It is a part on one side and a part on the other side across the position. The inner sheet layer 86 has a portion on one side and a portion on the other side across the folding position of the second sheet material 12H. In this structure, by folding back the first sheet material 12S and the second sheet material 12H sandwiching the lower end elastic member 83, two sheet layers other than the first sheet layer 81 and the second sheet layer 82 can be formed. Moreover, since each has a restoring force against folding back, folds having better cushioning properties are formed at the lower end portion 80 of the wing region J with less sheet material. The folding direction of the first sheet material 12S and the second sheet material 12H may be outward, and in this case, basically the same advantage is provided except that the orientation is different.

(Cover non-woven fabric)
In the pants-type disposable diaper of the outer split type, the inner body 200 is exposed between the front outer body 12F and the rear outer body 12B, so that the liquid impermeable sheet 11 is not exposed on the back surface of the inner body 200. It is preferable that the back surface of the inner body 200 is provided with a cover nonwoven fabric 13 extending from between the front outer body 12F and the inner body 200 to between the rear outer body 12B and the inner body 200. The inner surface and the outer surface of the cover nonwoven fabric 13 can be respectively bonded to the opposing surfaces via a hot melt adhesive.

The non-woven fabric used for the cover non-woven fabric 13 is not particularly limited by the type of fiber or the method of bonding (entanglement) the fibers, for example, a material similar to the material of the exterior bodies 12F and 12B can be appropriately selected. It is preferable to use an air-through nonwoven fabric, in which case the basis weight is preferably 20 to 40 g / m ² and the thickness is preferably 0.3 to 1.0 mm. As the cover nonwoven fabric 13, a nonporous nonwoven fabric having no holes penetrating on the front and back may be used, or a perforated nonwoven fabric having a large number of holes penetrating on the front and back may be used.

(Inner and outer joints)
The fixing of the inner body 200 to the outer bodies 12F and 12B can be performed by a joining means by material welding such as heat sealing or ultrasonic sealing, or by a hot melt adhesive. In the illustrated example, the inner surface of the exterior bodies 12F and 12B is applied to the back surface of the interior body 200, that is, the hot melt adhesive applied to the back surface of the liquid-impermeable sheet 11 and the base portion 65 of the rising gather 60 in this case. Is fixed. As shown in FIG. 2, the inner and outer joints 201 and 202 for fixing the inner body 200 and the outer bodies 12F and 12B can be provided over substantially the entire area where the inner and outer joints overlap each other. It can also be provided in a part other than the part.

<Others>
In the above-mentioned underpants type disposable wearing article, the side gather SG having the non-joined portion 77 may not be provided (the side gather itself may not be provided, or the side gather SG having no non-joined portion 77 may be provided. May be). However, when the side gathers SG having the non-joined portions 77 are provided, a large and soft fold is formed over substantially the entire periphery of the end of the leg opening LO. , Appearance is also preferable.

<Description of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

  "The front-back direction" means the direction (longitudinal direction) indicated by the symbol LD in the figure, and the "width direction" means the direction (left-right direction) shown by WD in the figure. Are orthogonal.

  ・ "Front side" means closer to the wearer's skin when wearing a pants-type disposable diaper, and "Back" means farther from the wearer's skin when wearing a pants-type disposable diaper. .

  ・ "Surface" means the side of the member that is closer to the wearer's skin when wearing the pants-type disposable diaper, and "Back" means from the wearer's skin when wearing the pants-type disposable diaper Means the far side.

  -"Elongation rate" means the value when the natural length is 100%. For example, an elongation ratio of 200% is synonymous with an elongation ratio of twice.

  "Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt%) 1.0 g of superabsorbent polymer was added to 49.0 g of the mixture, and the mixture was stirred with a stirrer. The resulting gel is left in a constant temperature / humidity bath at 40 ° C. × 60% RH for 3 hours and then returned to normal temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I. techno Engineering).

  ・ "Cost" is measured as follows. After pre-drying the sample or test piece, the sample or test piece is left in a test room or apparatus in a standard state (the test place is at a temperature of 23 ± 1 ° C. and a relative humidity of 50 ± 2%) to make it a constant weight state. Predrying refers to making a sample or a test piece a constant weight in an environment at a temperature of 100 ° C. Preliminary drying may not be performed for fibers having an official moisture content of 0.0%. A sample having a size of 100 mm x 100 mm is cut out from the test piece in a constant weight state using a template for sampling (100 mm x 100 mm). The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as the basis weight.

- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 0.098 N / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.

  -The water absorption is measured according to JIS K7223-1996 "Testing method for water absorption of superabsorbent resin".

  The water absorption rate is defined as "time to end point" when JIS K7224-1996 "Testing method for water absorption rate of superabsorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .

  -The "deployed state" means a state in which it is flattened without shrinkage or loosening.

  -Unless otherwise specified, the dimensions of each part mean dimensions in the expanded state, not the natural length state.

  -If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or apparatus in a standard condition (the test location is 23 ± 1 ° C and 50 ± 2% relative humidity). I do.

  The present invention can be used for a pants-type disposable diaper as described above.

  11 ... liquid impermeable sheet, 12A ... side seal part, 12B ... rear exterior body, 12E ... waist extension, 12F ... front exterior body, 12F, 12B ... exterior body, 12H ... second sheet material, 12S ... 1 sheet material, 13 ... cover non-woven fabric, 15, 19 ... lower waist elastic member, 16 ... cover elastic member, 17 ... waist elastic member, 18 ... unnecessary elastic member, 200 ... inner body, 201, 202 ... inner / outer joint, Reference Signs List 30 top sheet, 40 intermediate sheet, 50 absorption element, 56 absorber, 58 packaging sheet, 60 rise gather, 60A tip end part, 60B root part, 62 gather sheet, 63 gather Elastic member, 67: lying portion, 68: rising portion, A1: non-stretchable region, A2: stretchable region, C: buttocks cover portion, L: middle region, LD: front-back direction, T Waist circumference area, U: waist lower part, W: waist part, WD: width direction, WO: waist opening, LO: leg opening, P1: first part, P2: second part, HM: hot melt adhesive, 70 ... side flap portion, 71 ... first sheet layer, 72 ... second sheet layer, 73 ... side elastic member, 74 ... innermost sheet layer, 75 ... outermost sheet layer, 76 ... inner sheet layer, 77 ... non Bonding portion, 79: dedicated sheet material, SG: side gather, J: wing area, 80: lower end portion, 81: first sheet layer, 82: second sheet layer, 83: lower end elastic member, 84: innermost portion Sheet layer, 85: outermost sheet layer, 86: inner sheet layer, 87: non-joined part, UG: lower end gather.

Claims (7)

A front exterior body constituting at least a waist portion of the front body and a rear exterior body constituting at least a waist portion of the rear body are separately provided, and the front exterior body and the rear exterior body are separated in the front-rear direction,
An interior body extends in the front-rear direction from the front exterior body to the rear exterior body, and is joined to the front exterior body and the rear exterior body, respectively.
A side seal portion in which both sides of the front exterior body and both sides of the rear exterior body are joined, a waist opening and a pair of left and right leg openings,
A lower edge of a wing region extending on both sides of the inner body in the front exterior body and the rear exterior body is an upper edge of the leg opening,
The lower end of the wing region has one or more elongated lower end elastic members provided along the width direction and spaced from each other, and a first sheet layer facing the outside of the lower end elastic member. And a second sheet layer facing the inside of the lower end elastic member,
The lower end elastic member is fixed to the first sheet layer and the second sheet layer,
In pants-type disposable wearing articles,
The lower end of the wing region has three or more sheet layers including the first sheet layer and the second sheet layer, and overlaps the back of at least one of the innermost sheet layer and the outermost sheet layer. It has a non-joined part where the inner sheet layer is not joined,
The non-joined portion continues in the width direction in a front-rear direction range including a region between a lowermost elastic member located at a lowermost position and a lower edge of the wing region,
The gap between at least one of the innermost sheet layer and the outermost sheet layer and the inner sheet layer overlapping the back thereof is closed on both sides in the front-rear direction of the non-joined portion,
A lower end portion of the wing region is contracted in the front-rear direction by contraction of the lower end elastic member, and a lower end gather is formed in a portion including the non-joined portion at a lower end portion of the wing region,
Pants-type disposable wearing article characterized by the above-mentioned. The non-joined portion extends from a lower edge of the wing region to a position separated from the waist opening side by 2 to 15 mm,
The pants-type disposable wearing article according to claim 1. The portion from the lower edge in the wing region to the waist opening side from 2 to 15 mm does not include the lower end elastic member, and includes a part or all of the non-joined portion,
The pants-type disposable wearing article according to claim 1 or 2. At a position overlapping the non-joined portion in the thickness direction, at least one lower end elastic member is provided,
The pants-type disposable wearing article according to any one of claims 1 to 3. The inner sheet layer is non-fixed to sheet layers adjacent on both sides in the thickness direction,
The pants-type disposable wearing article according to any one of claims 1 to 4. One of the sheet material of the first sheet layer and the sheet material of the second sheet layer is a portion forming the innermost sheet layer or the outermost sheet layer, and a lower edge of the wing region, Folded back to the side having the lower end elastic member, and a portion forming the internal sheet layer,
At least a part of the portion forming the internal sheet layer is joined to one of the sheet material of the first sheet layer and the sheet material of the second sheet layer,
The pants-type disposable wearing article according to any one of claims 1 to 4. The sheet material of the first sheet layer and the sheet material of the second sheet layer have a folded portion that is folded to either the inside or the outside at the lower edge of the wing region,
The innermost sheet layer and the outermost sheet layer include a portion on one side of the sheet material of the first sheet layer and the sheet material of the second sheet layer with respect to a folding position of one of the sheet materials. Part on the other side,
The inner sheet layer is a portion on one side and a portion on the other side across a folding position of one of the sheet materials of the first sheet layer and the sheet material of the second sheet layer.
The pants-type disposable wearing article according to any one of claims 1 to 6.

Images