JP2020103562A - Absorbent article - Google Patents

Abstract

To provide an absorbent article having excellent air permeability compared to a conventional one.SOLUTION: In an absorbent article, a front body area covering the abdominal part of a wearer, a back body area covering the back part of the wearer, and a crotch area positioned between the front body area and the back body area and arranged with an absorber are connected. The absorbent article comprises in a trunk opening part into which the trunk part of the wearer can be inserted, in the front body area and the back body area: a trunk opening part lower contraction part which includes a plurality of elastic members extending along the waist direction from a portion corresponding at least to the hipbone of the wearer, and contracts the trunk opening part in the waist direction; and a trunk opening part upper contraction part which includes a plurality of elastic members extending along the waist direction between an opening part end edge of the trunk opening part, and the trunk opening part lower contraction part, and contracts the trunk opening part in the waist direction. An interval between the plurality of elastic members which the trunk opening part lower contraction part has is larger than an interval between the plurality of elastic members which the trunk opening part upper contraction part has.SELECTED DRAWING: Figure 7

Description

The present invention relates to absorbent articles.

BACKGROUND ART Absorbent articles such as disposable diapers, urine pads, and sanitary products are provided with an absorber that absorbs excreted liquid such as urine and body fluids. As this type of absorber, for example, pulp, superabsorbent polymer (SAP), or the like is used.

Then, when the absorbent article is worn, moisture generated from the urine or body fluid absorbed in the absorbent is inside space of the absorbent article (between the wearer's skin and the skin contact surface of the absorbent article). It is not preferable because it easily stays in the formed space) and the moisture causes skin troubles such as skin rash and causes discomfort such as stuffiness and stickiness.

Therefore, when the absorbent article is worn, various proposals have been made to improve the breathability of the absorbent article in order to discharge the moisture staying in the internal space of the absorbent article to the outside (for example, Patent Document 1). See 1). For example, a disposable diaper is known in which an outer layer sheet and an inner layer sheet are contracted in the waist circumferential direction by an elastic member to form a fold around the waist, and moisture is discharged to the outside from a gap between the fold and the skin of the wearer. ing.

Japanese Patent No. 5573806

As described above, various proposals have been made to improve the air permeability of the absorbent article, but in reality, it is desired to provide an absorbent article having higher air permeability. Therefore, one of the objects of the present invention is to provide an absorbent article having better air permeability than conventional ones.

In order to solve the above problems, the absorbent article according to the present invention is located between the front body region that covers the wearer's abdomen, the back body region that covers the wearer's back, and the front body region and the back body region. An absorbent article in which a crotch region in which an absorber is arranged is continuously provided, and in a front body region and a rear body region, at least a waist bone of a wearer at a waist opening capable of inserting a wearer's torso region. Including a plurality of elastic members extending in the girth direction from a portion corresponding to the, a lower part of the girth opening that contracts the girth opening in the girth direction, an opening edge of the girth opening, and a lower part of the girth opening. A plurality of elastic members extending along the waistline direction between the side contraction section, and a body opening upper side contraction section for contracting the body opening in the waistline direction, and a body opening lower side contraction section An interval between the plurality of elastic members included is larger than an interval between the plurality of elastic members included in the trunk opening upper side contracting portion.

The interval between the plurality of elastic members included in the lower-side contraction portion of the body opening may be 6.5 mm or more and 12 mm or less.

Moreover, the trunk opening lower contracting portion may be provided in a region including a range of 20 mm or more and 40 mm or less from the edge of the opening.

Further, further comprising a ventilation path forming sheet laminated so as to cover the skin facing surface in the trunk opening upper side contracting portion and the trunk opening lower side contracting portion, wherein the ventilation path forming sheet is in the girth direction with respect to the skin facing surface. The joints are intermittently provided along the joints, and the non-joint area located between the joints bends due to contraction of the upper opening contracting portion of the body opening and the lower contracting portion of the body opening, causing it to deform into a wavy shape. You may form a ventilation path by doing.

An opening end that contracts the waist opening in the waist direction including a plurality of elastic members extending in the waist direction along the opening edge between the opening end edge and the waist opening upper side contraction portion. The gap between the plurality of elastic members included in the opening end edge-side contracted portion may be larger than the distance between the plurality of elastic members included in the trunk opening upper-side contracted portion.

In addition, the elastic member included in the trunk opening upper side contraction portion is provided with a cover sheet that is included in a portion that forms the trunk opening, and the cover sheet is folded back at the edge portion of the opening portion, and the fold line of the folded portion You may have the continuous ventilation hole which penetrates a cover sheet.

With the above-mentioned absorbent article, it becomes possible to obtain better air permeability than in the past.

FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a diagram schematically showing a developed state of the diaper according to the embodiment. FIG. 4 is a diagram illustrating an installation mode of the ventilation path forming sheet of the diaper according to the embodiment. FIG. 5: is the figure which showed the site|part of the joining part which joins the ventilation path formation sheet. FIG. 6 is a diagram showing the magnitude of the contraction force at each contraction portion. FIG. 7: is a figure explaining the fold formed in the 2nd contraction part of waist gather and the 3rd contraction part of Tammy gather. FIG. 8: is the figure which showed typically the state which expanded the diaper which concerns on a modification. FIG. 9: is a figure explaining the fold which is formed in the 1st contraction part and 2nd contraction part of waist gather, and the 3rd contraction part of Tammy gather. FIG. 10: is the figure which showed the ventilation hole formed in the edge part of the opening part of a trunk|drum opening part, when a waist gather contracts.

Hereinafter, embodiments of the present invention will be described. The embodiment described below is an example of the embodiment of the present invention, and the technical scope of the present invention is not limited to the following modes.

<Embodiment>
FIG. 1 is a perspective view of a pants-type disposable diaper (hereinafter, simply referred to as “diaper”) 1 according to an embodiment. FIG. 2 is an exploded perspective view of the diaper 1 according to the embodiment. Moreover, FIG. 3 is a diagram schematically showing a developed state of the diaper 1 according to the embodiment. FIG. 3A schematically shows the internal structure of the diaper 1 when unfolded when viewed from the left side. FIG. 3B schematically shows the planar structure of the diaper 1 when unfolded.

The term regarding the direction used in the present specification means a direction that corresponds to the front, rear, left and right of the wearer when the diaper 1 is worn by the wearer. For example, in the present specification, the left-right direction means a direction that corresponds to the left and right of the wearer of the diaper 1 when worn.

In addition, in the present specification, the “front body region” of the diaper 1 means a portion that covers the abdomen (front of the body) of the wearer when the wearer wears the diaper 1. The “inseam region” of the diaper 1 means a portion that covers the inseam of the wearer when the diaper 1 is worn on the wearer. The “rear body region” of the diaper 1 means a part that covers the wearer's back (back of the body) when the wearer wears the diaper 1. Further, in the present specification, the “longitudinal direction” means the direction connecting the front body region and the back body region of the diaper 1. That is, the longitudinal direction of the diaper 1 coincides with the continuous direction in which the front body region, the crotch region, and the rear body region are continuously arranged. Further, the “width direction” means a direction orthogonal to the longitudinal direction of the diaper 1.

In the present embodiment, as an example of an absorbent article, a pants-type disposable diaper having a tubular structure having an opening into which the abdominal circumference of the wearer is inserted and a pair of left and right openings into which the left and right lower limbs of the wearer are inserted. However, the “absorbent article” in the present specification is not limited to pants-type disposable diapers. The "absorptive article" includes, for example, a tape fixed near one end of a sheet-shaped member that covers the wearer's crotch (pubic part) from the front body region to the back body region, and the other end of the sheet-shaped member. It includes various forms of absorbent articles that can wrap the abdominal girth and inseam, such as a tape-type disposable diaper having a tubular structure formed by being attached near the abdomen.

As shown in FIGS. 1 to 3, the diaper 1 includes a crotch region 1B that covers the wearer's inseam (pubic part) in a worn state, a front body region 1F that covers the wearer's abdomen, and a back body that covers the wearer's back. Region 1R. The crotch region 1B is located between the front body region 1F and the back body region 1R, and is connected to the front body region 1F and the rear body region 1R. The crotch region 1B absorbs and holds liquid. A main body 15 (absorber 8) is provided.

Since the diaper 1 in the present embodiment is a pants-type disposable diaper, the left side edge of the front body region 1F and the left side edge of the rear body region 1R are joined to each other, and the right side edge of the front body region 1F and the rear body region 1R are By joining the right side edges to each other, the state shown in FIG. 1 is assembled. As shown in FIG. 1, a torso opening (waist opening) 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. Further, in the diaper 1, a left lower limb opening 2L is formed on the left side of the crotch region 1B, which is not joined, and a right lower limb opening 2R is formed on the right side of the crotch region 1B. The left lower limb opening 2L and the right lower limb opening 2R are openings for inserting the legs of the wearer when the diaper 1 is worn.

The wearer's left lower limb is inserted through the left lower limb opening 2L, the wearer's right lower limb is inserted through the right lower limb opening 2R, and the wearer's torso enters (passes through) the torso opening 2T. When worn, the front body region 1F contacts the wearer's abdomen, the back body region 1R contacts the wearer's back side, the crotch region 1B is applied to the wearer's crotch region, and the left lower limb opening 2L and the right lower limb opening 2R are fixed to the wearer's body while surrounding the wearer's thigh. By fixing the diaper 1 to the wearer's body in this way, it is possible to walk while wearing the diaper 1.

In the diaper 1, an absorber 8 capable of absorbing and holding a liquid is arranged mainly around the crotch region 1B. In addition, the diaper 1 has a left lower limb opening 2L, a right lower limb opening 2R, and a torso opening in order to suppress formation of a gap serving as a liquid outflow path between the diaper 1 and the wearer's skin. A solid gather G1L, a solid gather G1R, and a waist gather G2 are provided in the portion 2T, respectively. The three-dimensional gathers G1L, G1R and the waist gathers G2 are configured to be in close contact with the wearer's skin by the elastic force of the rubber thread, whereby the excretory liquid discharged from the wearer does not leak from the diaper 1. It can be absorbed by the absorber main body 15 (absorber 8).

As shown in FIGS. 2 and 3, the diaper 1 has cover sheets 4F and 4R and a pad cover sheet 6 that form an outer surface when worn by a wearer. The cover sheet 4F is
The sheet member mainly forms the outer surface of the front body region 1F of the diaper 1. The pad cover sheet 6 is a sheet member mainly for forming the outer surface of the crotch region 1B of the diaper 1. The cover sheet 4R is a sheet member mainly for forming the outer surface of the rear body region 1R of the diaper 1.

The cover sheets 4F and 4R and the pad cover sheet 6 are provided, for example, to reinforce the outer surface of the diaper 1 and to improve the touch. Further, the cover sheets 4F and 4R and the pad cover sheet 6 can be formed of, for example, a nonwoven fabric made of a liquid-impermeable thermoplastic resin in order to suppress leakage of excrement. Here, examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP). Further, the liquid-impermeable sheet may be provided with a large number of fine holes of about 0.1 to several μm so that the liquid-impermeable and moisture-permeable properties can be exhibited.

Further, the diaper 1 has an inner cover sheet 5F laminated on the skin facing surface side of the cover sheet 4F and an inner cover sheet 5R laminated on the skin facing surface side of the cover sheet 4R. In the present specification, the “skin-facing surface” means the surface facing the wearer's skin when the wearer wears the diaper 1. As will be described later in detail, the inner cover sheet 5F is a sheet member that is attached to the cover sheet 4F in a state where a linear rubber elastic rubber is sandwiched between the inner cover sheet 5F and the cover sheet 4F. The inner cover sheet 5F is a sheet member having a shape and a size corresponding to a portion of the cover sheet 4F excluding a folded-back portion 4F5, which will be described later, and an outer cover first portion RW1. The inner cover sheet 5R is a sheet member that is attached to the cover sheet 4F with a linear elastic rubber thread sandwiched between the inner cover sheet 5R and the cover sheet 4R. The inner cover sheet 5R is a sheet member having a shape and size corresponding to a portion of the cover sheet 4R excluding a folded-back portion 4R5, which will be described later, and an outer cover first portion RW1.

The diaper 1 according to the present embodiment includes the absorbent body 15. The absorber main body 15 is held in a state of being bridged between the front body region 1F and the rear body region 1R, and is arranged in the crotch of the wearer when the diaper 1 is worn, and absorbs liquid such as urine excreted by the wearer. Absorb and hold. As shown in FIG. 2 and FIG. 3, the absorbent body 15 includes a pad cover sheet 6, a back sheet 7, an absorbent body 8, a center sheet 9, side sheets 10L, 10R, etc., which are integrally formed. ..

The back sheet 7, the absorber 8 and the center sheet 9 are sequentially laminated on the skin-facing surface of the pad cover sheet 6. The pad cover sheet 6 has a length from the front body of the wearer to the back body via the inseam in the longitudinal direction, and has a rectangular flat surface having a predetermined lateral width in the width direction orthogonal to the longitudinal direction. It is a sheet member having. Further, the back sheet 7, the absorber 8 and the center sheet 9 are all sheet members having a rectangular flat surface like the pad cover sheet 6, and the pad cover in a state where the longitudinal direction thereof coincides with the longitudinal direction of the pad cover sheet 6. The sheet 6 is laminated in this order.

The absorber 8 is a member for absorbing a liquid such as urine and holding the absorbed liquid. The absorber 8 is arranged between the liquid-impermeable back sheet 7 and the liquid-permeable center sheet 9. The absorbent body 8 has a structure in which the short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers or short fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate It may have a structure in which a granular absorbent resin such as a hydrophilic superabsorbent polymer having a cross-linking structure capable of absorbing and holding is retained. Accordingly, when the absorbent body 8 absorbs the liquid excreted from the wearer, the absorbent body 8 can swell the absorbent resin held in the gaps in the short fibers to hold the liquid in the short fibers. The absorber 8 may have a single-layer structure composed of one mat or a laminated structure in which a plurality of mats are stacked. Moreover, the absorber 8 can employ an appropriate shape according to the purpose. Examples of the shape of the absorber 8 include a rectangular shape, an hourglass shape in which the vicinity of the central portion is constricted, and various other shapes.

The center sheet 9 is a sheet member for directly contacting the skin of the wearer's inseam and allowing a liquid such as urine to pass through to the absorbent body 8, and is laminated so as to cover the water absorbing surface of the absorbent body 8. The center sheet 9 in this embodiment is formed of a liquid-permeable material having high flexibility. Examples of the liquid-permeable material forming the center sheet 9 include woven cloth, non-woven cloth, and porous film. Further, the center sheet 9 may have hydrophilicity.

The back sheet 7 is a sheet member for preventing the liquid that has passed through the center sheet 9 and is absorbed by the absorber 8 from leaking to the outside of the diaper 1. Therefore, the back sheet 7 is made of a liquid impermeable material. Examples of the liquid impermeable material forming the back sheet 7 include a liquid impermeable film made of polyethylene resin. Further, the back sheet 7 may be formed of a microporous polyethylene film having a large number of fine pores formed therein in order to ensure air permeability.

The pad cover sheet 6 is a member that reinforces the back sheet 7 and improves the feel of the back sheet 7, and is bonded to the back sheet 7. Examples of the material for forming the pad cover sheet 6 include woven cloth and non-woven cloth. Further, the pad cover sheet 6 may be a non-woven fabric or a wet non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene or polyester.

The side sheets 10L and 10R in the absorber main body 15 are elongated strip-shaped members for forming the above-mentioned three-dimensional gathers G1L and G1R. The side seats 10L and 10R are extended along the long side portion of the center seat 9. Thread rubbers 10L1 and 10R1 are adhered to the side sheets 10L and 10R along the longitudinal direction. The left side edge 4F7 of the cover sheet 4F forming the left side edge of the front body area 1F and the left side edge 4R7 of the cover sheet 4R forming the left side edge of the back body area 1R are joined together, and the right side edge of the front body area 1F is formed. When the right side edge 4F8 of the cover sheet 4F to be formed and the right side edge 4R8 of the cover sheet 4R forming the right side edge of the rear body region 1R are joined to each other to form the diaper 1 shown in FIG. 1, the side sheets 10L and 10R are assembled. Is pulled in the longitudinal direction by the contracting force of the rubber thread 10L1, 10R1, and as a result, rises from the center sheet 9 along the folding lines 10L2, 10R2.

As a result, three-dimensional gathers G1L and G1R that prevent the liquid from flowing out from the left lower limb opening 2L and the right lower limb opening 2R are formed. The method of joining the side edges of the cover sheets 4F and 4R to each other is not particularly limited, and examples thereof include heat sealing, high frequency sealing, and ultrasonic sealing. The absorbent body 15 extends from the front body region 1F to the back body region 1R.

Next, the detailed structure of the diaper 1 will be described. As shown in FIG. 3, the cover sheet 4F has a folded-back portion 4F5 formed by folding the front end side inward at the folding line 4F6. Hereinafter, the portion of the cover sheet 4F excluding the folded-back portion 4F5 is referred to as an exterior cover portion 4F10. The outer cover portion 4F10 of the cover sheet 4F forms the outer surface of the diaper 1. The folding line 4F6 of the cover sheet 4F forms the trunk opening edge 4F9 of the trunk opening 2T when the diaper 1 is assembled.

The folded-back portion 4F5 of the cover sheet 4F has the first thread rubber 4F1 in an expanded state arranged between the outer cover portion 4F10 and the folded-back portion 4F5. In addition, the folded portion 4F5 of the cover sheet 4F
Of the inner cover sheet 5F, the pad cover sheet 6, the back sheet 7, and one end side in the longitudinal direction of the absorber 8 are sandwiched between the outer cover part 4F10 and the outer cover part 4F10. It is glued in a stacked state. In the present specification, the aspect of expressing one member and another member as being overlapped with each other is not limited to an aspect in which the members overlap each other in the state of being entirely in contact with each other. Is a concept including a mode in which a part of the other part and the other member entirely overlap, a mode in which a part of the one member and a part of the other member overlap each other, and the like.

Further, as shown in FIG. 3, between the outer cover portion 4F10 and the inner cover sheet 5F in the cover sheet 4F, the second thread rubber 4F2, the third thread rubber 4F3, and the fourth thread rubber 4F4 are arranged from the folding line 4F6 side. Are arranged in this order, and are bonded in a state of being sandwiched between the outer cover portion 4F10 and the inner cover sheet 5F. As shown in FIG. 3, each of the first rubber thread 4F1 to the fourth rubber thread 4F4 in the cover sheet 4F is arranged in parallel, and each of them is arranged in a width direction (a girth direction) of the cover sheet 4F. Has been extended.

On the other hand, as for the cover sheet 4R, the folded-back portion 4R5 is formed by folding the leading end side inward at the folding line 4R6. Hereinafter, the portion of the cover sheet 4R excluding the folded portion 4R5 is referred to as an exterior cover portion 4R10. The exterior cover portion 4R10 of the cover sheet 4R forms the outer surface of the diaper 1. The folding line 4R6 of the cover sheet 4R forms the trunk opening edge 4R9 of the trunk opening 2T when the diaper 1 is assembled. The folded portion 4R5 of the cover sheet 4R has the first thread rubber 4R1 in the stretched state arranged between the outer cover portion 4R10 and the folded portion 4R5. The tip end side of the folded portion 4R5 of the cover sheet 4R sandwiches the inner cover sheet 5R, the pad cover sheet 6, the back sheet 7, and the other end side in the longitudinal direction of the absorber 8 between the outer cover portion 4R10 and the interlayer. In this state, the absorbent body 8 is bonded to the other end of the absorbent body 8 in a stacked state.

Further, as shown in FIG. 3, between the outer cover portion 4R10 and the inner cover sheet 5R in the cover sheet 4R, the second thread rubber 4R2, the third thread rubber 4F3, and the fourth thread rubber 4R4 are arranged from the folding line 4R6 side. Are arranged in this order, and are bonded to each other while being sandwiched between the outer cover portion 4R10 and the inner cover sheet 5R. As shown in FIG. 3, each of the first rubber thread 4R1 to the fourth rubber thread 4R4 in the cover sheet 4R is arranged in parallel, and each of them is arranged along the width direction (the girth direction) of the cover sheet 4R. Has been extended.

Hereinafter, in the cover sheets 4F and 4R of the diaper 1, the region where the first thread rubbers 4F1 and 4R1 and the second thread rubbers 4F2 and 4R2 are arranged is referred to as “waist area RW”. The waist region RW of the diaper 1 is a region located near the waist opening edges 4F9 and 4R9 forming the waist opening 2T and in which waist gathers G2 are formed. Further, in the waist region RW, a region where the first thread rubbers 4F1 and 4R1 are arranged is referred to as a “waist first region RW1” (first area), and a region where the second thread rubbers 4F2 and 4R2 are arranged. Is referred to as “waist second region RW2” (second region).

Moreover, in the cover sheets 4F and 4R of the diaper 1, the region where the third thread rubbers 4F3 and 4R3 and the fourth thread rubbers 4F4 and 4R4 are arranged is referred to as a "tammy area RT". Tammy region RT is a region located below waist region RW. The area in which the third thread rubbers 4F3 and 4R3 are arranged is referred to as "tammy first area RT1" in the tammy area RT, and the area in which the fourth thread rubbers 4F4 and 4R4 are arranged is referred to as "tammy second area RT2". ".

Here, the first thread rubbers 4F1 and 4R1 in the waist first region RW1 are coated with the adhesive in the stretched state, for example, in the assembly process of the diaper 1, and then the exterior cover portion 4F.
It is bonded between these layers by being sandwiched between 10, 4R10 and the folded portions 4F5, 4R5. Similarly, the second thread rubbers 4F2, 4R2 in the waist second area RW2, the third thread rubbers 4F3, 4R3 and the fourth thread rubbers 4F4, 4R4 in the tammy area RT are stretched in the process of assembling the diaper 1, for example. After the adhesive is applied in this state, it is sandwiched between the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R to be bonded between these layers.

Here, the first thread rubbers 4F1 and 4R1 in the waist first region RW1 that are sandwiched and adhered between the outer cover portions 4F10 and 4R10 of the cover sheets 4F and 4R and the inner cover sheets 5F and 5R in an expanded state contract. Then, the outer cover parts 4F10, 4R10 and the folded-back parts 4F5, 4R5 follow that and the part corresponding to the waist first region RW1 is continuously bent in a pleated shape, so that the waist first region RW1 is in the waistline direction. The first contraction portion S1 is formed to be contracted.

Also in the waist second region RW2, when the second thread rubbers 4F2, 4R2 that are sandwiched between the outer cover portions 4F10, 4R10 and the inner cover sheets 5F, 5R in a stretched state and adhered contract, the outer covers follow it. A second contraction that contracts the waist second region RW2 in the waistline direction by continuously bending the cover portions 4F10, 4R10 and the inner cover sheets 5F, 5R corresponding to the waist second region RW2 in a pleated shape. The portion S2 (which is an example of the “body opening upper contracting portion” in the present application) is formed.

In the present embodiment, the waist gathers G2 are formed mainly by the first contracted portions S1 formed in the first waist region RW1 and the second contracted portions S2 formed in the second waist region RW2. The waist gather G2 improves the fit of the diaper 1 around the waist of the wearer by the contracting force of the first thread rubbers 4F1 and 4R1 and the second thread rubbers 4F2 and 4R2. In the first contraction portion S1 of the waist gather G2, the plurality of first thread rubbers 4F1 and 4R1 are arranged in parallel with each other and at a constant interval A1. In addition, a plurality of second thread rubbers 4F2 and 4R2 are provided in parallel with each other at a constant interval A2 in the second contraction portion S2 of the waist gather G2. The interval between the rubber threads means the distance between adjacent rubber threads in the longitudinal direction of the diaper (the direction connecting the body area and the back body area).

Further, in the present embodiment, the first thread rubbers 4F1, 4R1 in the waist first area RW1 and the second thread rubbers 4F2, 4R2 in the waist second area RW2 extend over the entire width section of the cover sheets 4F, 4R. ing. Therefore, after the diaper 1 is completed, the first thread rubbers 4F1 and 4R1 and the second thread rubbers 4F2 and 4R2 form a substantially annular elastic member that circulates along the trunk opening 2T. In other words, after the diaper 1 is completed, the waist gathers G2 (the first contracted portion S1 and the second contracted portion S2) are formed over the entire circumference in the waistline direction.

Also in the tammy first region RT1, when the third thread rubbers 4F3, 4R3 that are sandwiched and adhered in a stretched state between the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R contract, Following this, the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R have portions corresponding to the first Tammy first region RT1 that are continuously bent in a pleated shape. A third shrinkage portion S3 (which is an example of the “lower waist portion shrinkage portion in the present application”) that shrinks the one region RT1 in the waistline direction is formed. The third contraction portion S3 is a region that fits near the height of the wearer's hip bone when the diaper 1 is worn, and is provided in a region including a range of 20 mm or more and 40 mm or less from the opening edge of the torso opening 2T. ing.

Also in the tammy second region RT2, the fourth thread rubbers 4F4, 4R4 that are sandwiched and adhered between the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R in an expanded state are provided. When contracted, the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R of the cover sheets 4F, 4R are flexed continuously in a pleated shape by flexing the portion corresponding to the second Tammy region RT2. A fourth contraction portion S4 that contracts the second Tammy region RT2 in the waistline direction is formed. In the present embodiment, the tammy gather G3 is formed mainly by the third contraction portion S3 formed in the first tammy area RT1 and the fourth contraction portion S4 formed in the second tammie area RT2. Tammy gather G3 improves the fit of the diaper 1 around the lower abdomen of the wearer, for example, by the contracting force of the third thread rubbers 4F3, 4R3 and the fourth thread rubbers 4F4, 4R4.

The third thread rubbers 4F3 and 4R3 arranged in the third contraction portion S3 of the tammy gather G3 are provided in parallel with each other and at a constant interval A3. Further, the fourth thread rubbers 4F4 and 4R4 arranged in the fourth contraction portion S4 of the tammy gather G3 are also provided in parallel to each other and at a constant interval A4. Further, in the present embodiment, the distance A3 between the third thread rubbers 4F3 and 4R3 in the third contraction portion S3 of the Tammy gather G3 is smaller than the distance A2 between the second thread rubbers 4F2 and 4R2 in the second contraction portion S2 of the waist gather G2. Is also set to a large size, so that when the diaper 1 is worn by widening the torso opening 2T, the third contraction portion S3 of the Tammy gather G3, which is a portion that contacts the wearer's hip bone, and the waist gather G2. The second contraction portion S2 is relatively easier to expand.

Moreover, in this embodiment, in order to form the 1st contraction part S1-the 4th contraction part S4, each thread rubber 4F1, 4R1, 4F2, 4R2, 4F3, 4R3, 4F4, 4R4 of cover sheet 4F, 4R. Although it is extended along the width direction (the girth direction), the linear elastic member is not limited to the rubber thread, and other materials and forms may be used. In addition, in the present specification, the term “linear” represents an elongated shape extending in a specific direction, and is a concept including a strip shape and a strip shape. In addition, examples of the material of the thread rubber include natural rubber and synthetic rubber, but are not limited to specific materials.

Next, the ventilation path forming sheets 11F and 11R of the diaper 1 will be described. As shown in FIG. 2 and FIG. 3, the diaper 1 includes the folded-back portions 4F5 and 4R5 of the cover sheets 4F and 4R and the longitudinal end regions of the pad cover sheet 6, the center sheet 9 and the like of the absorbent body 15. Ventilation path forming sheets 11F and 11R that are stacked and arranged on the folded portions 4F5 and 4R5 are provided. The ventilation path forming sheets 11F and 11R form skin contacting surfaces in the waist gathers G2 and the Tammy gathers G3 of the diaper 1. The “skin contacting surface” means a surface that directly contacts the wearer's skin when the diaper 1 is worn, that is, the innermost surface of the diaper 1.

FIG. 4 is a diagram illustrating an installation mode of the ventilation path forming sheets 11F and 11R of the diaper 1 according to the embodiment. FIG. 4A is a diagram showing a state in which the first contraction portion S1 of the waist gather G2 is viewed from the inner space side of the diaper 1. Further, FIG. 4B is a diagram schematically showing the internal structure in the first contraction portion S1 of the waist gather G2 when viewed from the side of the diaper 1. In addition, FIG. 4C is a diagram showing a state in which the first contraction portion S1 of the waist gather G2 is viewed from above the diaper 1 (that is, the direction of the arrow A in (B)). For convenience, FIGS. 4A and 4C show a state before the first contraction portion S1 in the waist gather G2 contracts. Further, FIG. 4D is a diagram showing a state in which the first contracted portion S1 of the waist gather G2 after contracting is viewed from above.

The ventilation path forming sheets 11F and 11R are arranged at least at the portions corresponding to the first contraction portion S1, the second contraction portion S2, and the third contraction portion S3, and the pad cover is provided via the joint portion indicated by reference numeral S. It is joined to the end region in the longitudinal direction of the sheet 6 and the folded portions 4F5, 4R5 and the like. FIG. 5: is the figure which showed the site|part of the joining part S which joins the ventilation path formation sheets 11F and 11R. In this embodiment, the cover sheet 4 made of a thermoplastic resin
The joints S are formed by ultrasonically welding the folded portions 4F5, 4R5 of F, 4R and the ventilation path forming sheets 11F, 11R laid on the pad cover sheet 6. As shown in FIG. 4(A) and FIG. 5, a plurality of joints S are intermittent from the trunk opening edges 4F9, 4R9 of the cover sheets 4F, 4R along the longitudinal direction orthogonal to the waistline direction (width direction). The linear joint portion SL extending in the longitudinal direction of the diaper 1 is formed by being arranged in. In other words, one linear joint SL is formed as an assembly of a plurality of joints S which are intermittently arranged along the longitudinal direction of the diaper 1. Here, the “intermittently” arrangement means a mode in which they are arranged discontinuously or intermittently.

As shown in FIG. 4A, a plurality of linear joint portions SL are intermittently provided in the first contraction portion S1 of the waist gather G2 along the waistline direction (width direction) of the cover sheets 4F and 4R. It is arranged. In the example shown in FIG. 4A, the linear joints SL are provided in parallel with each other, and the intervals between the linear joints SL are set to be large and small alternately. That is, the linear joints SL are intermittently arranged in such a manner that the double lines formed by the set of linear joints SL are arranged at equal intervals in the waistline direction (width direction). Note that, in FIG. 3A, the range in which the linear bonding portion SL extends in the longitudinal direction of the diaper 1 is shown by hatching. As illustrated, the linear joint portion SL extends over the waist first region RW1 in which the first contraction portion S1 is formed and the waist second region RW2 in which the second contraction portion S2 is formed.

The ultrasonic bonding of the air passage forming sheets 11F and 11R in the first contraction portion S1 and the second contraction portion S2 of the waist gather G2 and the third contraction portion S3 of the tammy gather G3 is performed by the first thread rubbers 4F1 and 4R1 of the waist gather G2. And the second thread rubbers 4F2, 4R2, and the third thread rubbers 4F3, 4R3 and the fourth thread rubbers 4F4, 4R4 of the Tammy gather G3 are in the extended state. Then, after the air passage forming sheets 11F, 11R in the first contraction portion S1 and the second contraction portion S2 of the waist gather G2 and the third contraction portion S3 of the Tammy gather G3 are completed, they are sandwiched and fixed between the sheet layers. The extended state of the first thread rubbers 4F1 and 4R1, the second thread rubbers 4F2 and 4R2, the third thread rubbers 4F3 and 4R3, and the fourth thread rubbers 4F4 and 4R4 is released. As a result, the waist gathers G2 and the tammy gathers G3 contract, and the space between the linear joint portions SL in the ventilation path forming sheets 11F and 11R is narrowed. As a result, the non-bonding region 110 located between the linear bonding portions SL of the ventilation path forming sheets 11F and 11R is bent and deformed into a waveform.

As a result, the non-bonding regions 110 located between the linear bonding parts SL are separated from each other, so that the folded-back parts 4F5, 4R5 and the like and the ventilation path forming sheets 11F, 11R are separated as shown in FIG. 4D. A first ventilation path 111 surrounded by the non-bonding region 110 is formed. Further, the second ventilation passage 112 is formed on the skin contact surface 11a side of the ventilation passage forming sheets 11F and 11R. In FIG. 4(D), the chain double-dashed line indicated by the symbol SS shows the skin surface that is in contact with the ventilation path forming sheets 11F and 11R when the wearer wears the diaper 1 as a virtual line. The second ventilation passage 112 is formed as a gap formed between the skin contact surfaces 11a of the ventilation passage forming sheets 11F and 11R and the wearer's skin when the diaper 1 is worn by the wearer. Moisture in the inner space of the diaper 1 passes through the first ventilation passage 111 and the second ventilation passage 112 formed in the first contraction portion S1 and the second contraction portion S2 of the waist gather G2 and the third contraction portion S3 of the tammy gather G3. Can be discharged to the outside. The first ventilation passage 111 is a ventilation passage through which moisture that has permeated the ventilation passage forming sheets 11F and 11R from the internal space of the diaper 1 passes. On the other hand, the second ventilation path 112 is a ventilation path that directly communicates the internal space and the external space of the diaper 1, and can drain the moisture in the diaper 1 more smoothly.

As shown in FIG. 4D, after the waist gather G2 and the Tammy gather G3 are contracted, the relatively large first fold 41 and the relatively small second fold that form the first contraction portion S1. 42 and 42 are formed alternately. In addition, the ventilation path forming sheet 11 that is bent and deformed into a corrugated shape
Also in F and 11R, relatively large first folds 113 and relatively small second folds 114 are alternately formed. This is because the intervals between the linear joining portions SL are set to be alternately large and small. That is, the large first folds 41, 113 are formed by the pair of linear joints SL having a wide interval, and the small second folds 42, 114 are formed by the pair of linear joints SL having a small interval.

Here, in order to secure the large first ventilation passage 111, the first folds 113 of the ventilation passage forming sheets 11F and 11R that are bent and deformed in a corrugated shape cooperate with the first folds 41 that form the first contraction portion S1. Contribute. On the other hand, the second folds 114 of the ventilation path forming sheets 11F and 11R cooperate with the second folds 42 forming the first contraction portion S1 to form the first ventilation path 111, and in the waistline direction (width direction). The first folds 113 adjacent to each other are appropriately separated from each other, which contributes to secure the ventilation cross section of the second ventilation passage 112. In the present embodiment, the flute structure formed by the ventilation path forming sheets 11F and 11R that is deformed into a corrugated shape following the contraction of the waist gather G2 and the Tammy gather G3 has a first contraction portion S1 of the waist gather G2 and a second contraction. By providing the portion S2 and the third contraction portion S3 of the Tammy gather G3 on the skin contact surface side, the moisture in the diaper 1 can be efficiently discharged to the outside through the first ventilation passage 111 and the second ventilation passage 112. it can. In addition, in the present embodiment, since the linear joint portion SL is formed as an assembly of a plurality of joint portions S which are intermittently arranged along the longitudinal direction of the diaper 1, a gap between the joint portions S is formed. The adjacent first air passages 111 communicate with each other through. Therefore, it is possible to improve the air permeability between the adjacent first air passages 111 and make it difficult for the wearer to feel a local stuffiness.

Further, the ventilation path forming sheets 11F and 11R in the present embodiment are provided with a large number of minute ventilation holes 11F1 and 11R1 for ventilation. Here, the ventilation hole means an opening that connects the space on the one surface side of the sheet and the space on the other surface side of the sheet, and the shape thereof is not particularly limited. Therefore, as the ventilation holes 11F1 and 11R1, for example, openings having a shape such as a circle, an ellipse, and a polygon (triangle, quadrangle, etc.) can be applied. The formation of the ventilation holes 11F1 and 11R1 in the ventilation path forming sheets 11F and 11R does not mean that the ventilation path forming sheets 11F and 11R are materials having no air permeability, and the ventilation path forming sheet 11F and 11R may be either a breathable material or a non-breathable material. The ventilation path forming sheets 11F and 11R are preferably made of a material having air permeability or liquid permeability, but may be, for example, a non-air permeable material. The size and number of the ventilation holes 11F1 and 11R1 are not particularly limited, but for example, if the holes have an opening area of 0.5 to 10 mm ² , about 5 to 200 are preferably formed.

Then, as a result of intensive studies by the present inventors, the third thread rubber 4F3 forming the third contraction portion S3 is more than the distance A2 between the second thread rubbers 4F2 and 4R2 forming the second contraction portion S2. By increasing the distance A3 between the 4R3s, the third contraction portion S3 is guided to the wearer's lumbar bone so that the diaper 1 is properly worn, and the third contraction expands and contracts in accordance with the wearer's movement. It has been found that the pumping effect associated with the deformation of the first ventilation passage 111 and the second ventilation passage 112 in the portion S3 due to the expansion and contraction promotes the discharge of moisture from the inside of the diaper 1. Particularly, by setting the interval A3 to be 6.5 mm or more and 12 mm or less, the ventilation path forming sheets 11F and 11R are restrained by the third thread rubbers 4F3 and 4R3 as compared with the case where the interval A3 is set to a narrower interval. It has been found that the degree of restraint is reduced, and the degree of restraint is reduced, so that the first ventilation passage 111 and the second ventilation passage 112 are enlarged, and the pump effect in the third contraction portion S3 is enhanced.

FIG. 6 is a diagram showing the magnitude of the contraction force at each contraction portion. The white arrow shown in FIG. 6 indicates the magnitude of the contracting force. In the diaper 1 of the present embodiment, the distance A3 between the third thread rubbers 4F3 and 4R3 forming the third contraction portion S3 is smaller than the distance A2 between the second thread rubbers 4F2 and 4R2 forming the second contraction portion S2. large. Therefore, in the diaper 1 of the present embodiment, as shown in FIG. 6, the contraction force of the third contraction part S3 is weaker than the contraction force of the first contraction part S1 and the contraction force of the second contraction part S2. And the 3rd contraction part S3 is designed so that a wearer's lumbar bone may be contact|abutted in the state which the diaper 1 was equipped in the suitable position, and a lumbar bone of a wearer is shown in FIG. This is the widest part of the waist. In addition, the third contraction portion S3 is arranged so that the distance between the first joint and the second joint of the index finger of a general adult and the finger tip is within a range of 20 mm or more and 40 mm or less, and the trunk opening 2T Is provided in a region including a range of 20 mm or more and 40 mm or less from the edge of the opening. Therefore, in the diaper 1 of the present embodiment, the contraction force of the third contraction part S3 is weaker than the contraction force of the first contraction part S1 and the contraction force of the second contraction part S2. When expanded by, the third contraction S3 expands most, so the second joint of the index finger of the person doing the wearing work is caught near the opening edge of the torso opening 2T, and the third contraction S1 and the first contraction S1 The second contraction portion S2 is located between the first joint and the second joint of the index finger, and the tip of the index finger is caught on the third contraction portion S3 which is more easily spread than the first contraction portion S1 and the second contraction portion S2. Become. Then, the waist bone having the largest lateral width in the waistline of the wearer is attached so as to be naturally accommodated in the third contraction portion S3 that is widest. As a result, the diaper 1 designed such that the third contraction portion S3 comes into contact with the wearer's lumbar bone is attached to the wearer at an appropriate position.

FIG. 7: is a figure explaining the fold formed in the 2nd contraction part S2 of waist gather G2, and the 3rd contraction part S3 of Tammy gather G3. The folds formed between the thread rubbers are more restricted by the thread rubbers at locations closer to the thread rubbers. Therefore, the first folds 113 and the second folds 114 of the ventilation path forming sheets 11F and 11R formed between the third thread rubbers 4F3 and 4R3 are narrower than the spacing A3 between the third thread rubbers 4F3 and 4R3. It is less restricted than the first folds 113 and the second folds 114 of the ventilation path forming sheets 11F and 11R formed between the second thread rubbers 4F2 and 4R2 arranged at the interval A2. Therefore, the folds formed in the third contracted portion S3 of the Tammy gather G3 are larger than the folds formed in the second contracted portion S2 of the waist gather G2. Therefore, according to the diaper 1 according to the present embodiment, the sizes of the first ventilation passage 111 and the second ventilation passage 112 formed by the first fold 113 and the second fold 114 in the portion of the Tammy gather G3 are different. Larger than the site. And since the Tammy gather G3 is a portion which expands and contracts by a wearer's operation, the 1st ventilation way 111 and the 2nd ventilation way 112 formed in the portion of Tammy gather G3 expand and contract in conjunction with a wearer's operation. By doing so, the pump function is exerted, and the moisture in the diaper 1 is discharged more smoothly. Further, the hipbone portion of the wearer is the portion having the largest lateral width around the waistline of the wearer, and is also a portion where the wearer's surroundings are likely to come into contact with and exert external pressure, so the Tammy gather G3 corresponding to the hipbone portion Then, the pump effect due to the expansion and contraction of the first ventilation path 111 and the second ventilation path 112 by the external pressure is also expected. As a result, the internal space of the diaper 1 can be made a more comfortable environment.

Further, according to the diaper 1 according to the present embodiment, the folds formed in the portion of the Tammy gather G3 are larger than the folds formed in the second contraction portion S2 of the waist gather G2, and thus the folds of the portion of the Tammy gather G3 are included. Is more conspicuous than others, and the wearer can be naturally aware that the Tammy gather G3 abuts on the waist bone having the largest lateral width around the waist of the wearer. Further, since the folds formed in the portion of the Tammy gather G3 are larger than the folds formed in the second contraction portion S2 of the waist gather G2, the portion of the Tammy gather G3 easily expands when expanding the trunk opening 2T. Therefore, when the diaper 1 is worn, the diaper 1 is likely to be naturally aligned so that the portion of the tammy gather G3, which is relatively easy to spread, comes into contact with the hip bone.

By the way, the diaper 1 of the said embodiment may be modified as follows, for example. FIG. 8: is the figure which showed typically the state which expanded the diaper 1 which concerns on a modification. In this modification, the interval A1 between the first thread rubbers 4F1 and 4R1 in the first contraction portion S1 is set to be larger than the interval A2 between the second thread rubbers 4F2 and 4R2 in the second contraction portion S2. Thus, the first contraction portion S1 ensures the moisture discharging function of discharging the moisture in the internal space of the diaper 1 to the outside and the function of facilitating the widening of the trunk opening 2T. On the other hand, the second contraction portion S2 of the waist gather G2 increases the contraction force in the waistline direction as compared with the first contraction portion S1 to suppress the slippage when the diaper 1 is worn (the slippage suppression). Function).

FIG. 9 is a diagram illustrating the folds formed in the first contraction portion S1 and the second contraction portion S2 of the waist gather G2 and the third contraction portion S3 of the tammy gather G3. As described above, the folds formed between the thread rubbers are more restricted by the thread rubbers at positions closer to the thread rubbers. Therefore, the first folds 113 and the second folds 114 of the air passage forming sheets 11F and 11R formed between the first thread rubbers 4F1 and 4R1 are narrower than the spacing A1 between the first thread rubbers 4F1 and 4R1. It is less restricted than the first folds 113 and the second folds 114 of the ventilation path forming sheets 11F and 11R formed between the second thread rubbers 4F2 and 4R2 arranged at the interval A2. Therefore, the folds formed on the first contracted portion S1 of the waist gather G2 are larger than the folds formed on the second contracted portion S2 of the waist gather G2. Therefore, according to the diaper 1 according to the present modification, the first ventilation passage 111 and the second ventilation passage 112 formed by the first folds 113 and the second folds 114 in the portion of the first contraction portion S1 of the waist gather G2. Is larger than that of the second contraction portion S2. Since the waist gather G2 is a portion that expands and contracts according to the action of the wearer, the first ventilation passage 111 and the second ventilation passage 112 have portions of the first contraction portion S1 of the waist gather G2 and the portion of the Tammy gather G3. The pump function is exhibited at each of the two locations, and the moisture in the diaper 1 is discharged more smoothly (double pump function). As a result, the internal space of the diaper 1 can be made a more comfortable environment.

By the way, in the diaper 1 described above, ventilation lines penetratingly formed by fine cuts linearly formed may be arranged in a dotted line in the folding lines 4F6, 4R6 of the cover sheets 4F, 4R. In this case, it is preferable that the dotted-line ventilation holes formed in the folding lines 4F6 and 4R6 have a size that does not allow the wearer's fingers to enter. For example, a general infant's finger does not enter as long as it is a vent hole formed by a cut having a length of 5 mm or less. Also, the folding lines 4F6, 4R6 are cut lines that form a vent hole in a dotted line so that the cover sheets 4F, 4R are not torn at the boundaries of the folding lines 4F6, 4R6 due to normal use of the diaper 1. It is preferable that the distance between them has a predetermined length. Although it depends on the strength of the materials forming the cover sheets 4F and 4R, if the basis weight is about 8 to 50 g/m ² that does not impair the stretchability required for the waist and the feeling of wearing, the distance between the cuts is It is preferably 2 mm or more.

FIG. 10: is the figure which showed the ventilation hole formed in the edge part of the opening part of the trunk opening part 2T when the waist gather G2 contracts. Although FIG. 10 shows the cover sheet 4F, the same applies to the cover sheet 4R. In the diaper 1 of the present modification, since the folding lines 4F6, 4R6 of the cover sheets 4F, 4R are the ventilation holes of the dotted line formed by the fine cuts linearly formed, the waist gather 3R has the rubber thread 4F1,. When contracted by the contraction force of 4F2, the fine cuts forming the folding lines 4F6 and 4R6 expand, and the vent holes 4F6K in the portions other than the joints 4F6T between the cuts expand. Therefore, in the diaper 1 of the present modification, not only the ventilation passages (spaces indicated by halftones in FIG. 10) formed between the ventilation passage forming sheets 11F and 11R and the cover sheets 4F and 4R, but also the cover sheet 4F, By folding 4R around the folding lines 4F6, 4R6 as a boundary, a ventilation passage (a space shown by hatching in FIG. 10) formed in the cover sheets 4F, 4R is formed. Therefore, the diaper 1 of the present embodiment has a higher breathability in the waist gather 3R as compared with the diaper 1 in which the vent holes 4F6K are not formed in the folding lines 4F6 and 4R6. In particular, if combined with the form having the double pump function shown as the above modified example, that is, the form in which the pump function is exhibited at each of the two portions of the first contraction portion S1 and the Tammy gather G3 of the waist gather G2. The ventilation through the ventilation holes 4F6K is also added, and the moisture in the diaper 1 can be discharged more smoothly. As a result, the internal space of the diaper 1 can be made a more comfortable environment.

In addition, although the ventilation path forming sheets 11F and 11R are provided in the diaper 1 of the above embodiment, the ventilation path forming sheets 11F and 11R may be omitted. When the ventilation path forming sheets 11F and 11R are omitted, the first ventilation path 111 and the second ventilation path 112 are lost, but the reduction in the degree of restraint by the third thread rubbers 4F3 and 4R3 is maintained. A state in which the size of the folds formed in the contracted portion S3 is larger than the surroundings is maintained, and the pump effect in the third contracted portion S3 can be maintained as in the above embodiment.

1.・Diaper 1B・・Inseam area 1F・・Front body area 1R・・Back body area 2T・・Torso opening G2・・Waist gathers 4F, 4R 4R2 ··· 2nd thread rubber 4F3, 4R3 · · 3rd thread rubber 4F4, 4R4 · · 4th thread rubber 11F, 11R · · Ventilation path forming sheet S · · Joined portion S1 · · 1st contraction portion S2 · · 2 contraction section S3... third contraction section S4... fourth contraction section

Claims (6)

A front body region that covers the wearer's abdomen, a back body region that covers the wearer's back, and a crotch region in which the absorber is arranged while being located between the front body region and the back body region are connected. An absorbent article,
Of the front body region and the rear body region, in a body opening that can be inserted through the body of the wearer, at least a plurality of elastic members extending along the waistline direction from a region corresponding to the hip bone of the wearer. Including a waist opening lower contraction portion that contracts the trunk opening in the waistline direction,
A torso opening for contracting the torso opening in a torso direction including a plurality of elastic members extending in the torso direction between the opening end edge of the torso opening and the torso lower contracting portion. An upper contraction portion,
The interval between the plurality of elastic members included in the trunk opening lower contracting portion is larger than the interval between the plurality of elastic members included in the trunk opening upper contracting portion,
Absorbent article. The interval between the plurality of elastic members included in the trunk opening lower contracting portion is 6.5 mm or more and 12 mm or less,
The absorbent article according to claim 1. The trunk opening lower contracting portion is provided in a region including a range of 20 mm or more and 40 mm or less from the opening edge.
The absorbent article according to claim 1 or 2. Further comprising a ventilation path forming sheet laminated so as to cover the skin-facing surface of the trunk opening upper contracting portion and the trunk opening lower contracting portion,
The ventilation path forming sheet is joined to the skin-facing surface by a plurality of joints that are intermittently provided along the waistline direction, and the contraction of the trunk opening upper contraction portion and the trunk opening lower contraction portion. The non-bonding region located between the bonding parts is bent by the bending and is deformed into a wave shape to form a ventilation path,
The absorbent article according to any one of claims 1 to 3. An opening that includes a plurality of elastic members extending in the girth direction along the opening edge between the opening edge and the waist opening upper side contraction portion, and contracts the trunk opening in the girth direction. Further provided with a contraction portion on the end edge side,
The interval between the plurality of elastic members included in the opening end side contracting portion is larger than the interval between the plurality of elastic members included in the trunk opening upper contracting portion,
The absorbent article according to any one of claims 1 to 4. An elastic member included in the trunk opening upper side contracting portion, a cover sheet including a portion forming the trunk opening,
The cover sheet is folded back at a portion of the opening end edge, and has a continuous vent hole penetrating the cover sheet at a fold of the folded portion,
The absorbent article according to any one of claims 1 to 5.

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