JP2018023760A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article that improves air permeability while used.SOLUTION: There are provided: a liquid-impermeable back sheet; a liquid-permeable top sheet 19 positioned nearer on the skin side than the back sheet; and an absorber 18 positioned between the top sheet 19 and the back sheet. The top sheet 19 is provided with a rear side sheet element 21 and a surface side sheet element 26. In the rear side sheet element 21, both recesses 23 and projections 22 extend along a back and forth direction of the absorbent article and are arranged by turns, one by one, along a girth direction of the absorbent article, and the recesses 23 and the projections 22 have wavy shapes in a cross section including the girth direction, and positions where the projections 22 of the rear side sheet element 21 are in contact with the surface side sheet element 26 are composed as bond parts 24.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an absorbent article.

  Disposable diapers and urine pads are known as absorbent articles. These absorbent articles are generally composed of a liquid-impermeable back sheet, a liquid-permeable top sheet, and an absorbent body disposed between the top sheet and the back sheet. And the absorber at the time of wear hold | maintains liquids, such as urine which is excrement, via a top sheet, and it is suppressed that a liquid leaks out of an absorbent article with a back sheet.

  A top sheet is a sheet | seat arrange | positioned on an absorber and always contact | connects a wearer's skin. For this reason, it is calculated | required that a top sheet is low irritation | stimulation with respect to a wearer's skin (refer patent document 1). For example, there is a top sheet in which a sheet element having no concavo-convex structure and a sheet element provided with a concavo-convex structure in a dotted pattern by embossing are stacked and an embossed sheet is disposed on the skin side of the wearer. With such a structure, the top sheet forms a gap with the wearer's skin to improve air permeability.

Japanese Patent Laid-Open No. 2006-112408

  However, the uneven structure provided in the form of dots by embossing is surrounded by a plurality of convex parts located around the concave part that forms a gap with the wearer's skin. Breathability will be hindered.

  An object of this invention is to provide the absorbent article which enabled improvement of the air permeability at the time of use.

  An absorbent article for solving the above problems includes a liquid-impermeable back sheet, a liquid-permeable top sheet positioned closer to the wearer's skin than the back sheet, the top sheet, and the back sheet. And an absorber positioned between the two. The top sheet is formed by overlapping a plurality of sheet elements. The plurality of sheet elements include a front side sheet element positioned on the skin side of the wearer and a back side sheet element positioned adjacent to the absorber. The plurality of sheet elements include a first sheet element and a second sheet element bonded to the first sheet element. At least one of the front-side sheet element and the back-side sheet element is a first sheet element, and the first sheet element has a concave portion and a convex portion extending along the front-rear direction of the absorbent article, and the absorbent property. It arranges alternately one by one along the circumference direction of an article, and the above-mentioned crevice and the above-mentioned convex part have a wave shape in the section of the above-mentioned circumference direction. The second sheet element is an adhesive portion where a position in contact with the convex portion of the first sheet element is bonded to the first sheet element.

  According to the said structure, by providing the 1st sheet | seat element which has the waveform shape extended in the front-back direction of an absorbent article, air permeability is provided in the clearance gap formed between a 1st sheet | seat element and a 2nd sheet | seat element. Can be secured.

In the absorbent article, the back sheet element may be the first sheet element, and the front sheet element may be the second sheet element.
According to the above configuration, body pressure can be supported by the corrugated shape of the back-side sheet element. Then, after the liquid is dispersed in the gap formed on the lower side of the front side sheet element, it is absorbed by the absorbent body, and air permeability can be ensured.

The said absorbent article WHEREIN: The said 2nd sheet element is good also as a structure which is a sheet | seat element of the nonwoven fabric which does not have the said recessed part and the said convex part.
According to the said structure, a liquid can be immediately absorbed with the front side sheet | seat element comprised with the nonwoven fabric which does not have a recessed part and a convex part.

In the absorbent article, the second sheet element may have a configuration similar to that of the first sheet element.
According to the said structure, a front side sheet | seat element can also reduce friction with a wearer's skin and improve low irritation | stimulation property by also having a waveform shape. In addition, the corrugated shape of the back side sheet element and the corrugated shape of the front side sheet element are abutted, so that the gap formed between the back side sheet element and the front side sheet element can be increased, and air permeability can be increased. Can be improved.

In the absorbent article, an intermediate sheet element may be interposed between the front sheet element and the back sheet element.
According to the said structure, air permeability can be ensured by the clearance gap comprised by the back side sheet | seat element and the intermediate sheet element, and the gap | interval comprised by the front side sheet | seat element and the intermediate sheet element. In each gap, the liquid can be diffused.

In the absorbent article, the intermediate sheet element may be a sheet containing a superabsorbent polymer.
According to the above configuration, the intermediate sheet element can have a liquid absorption function, and the liquid absorption function can be improved.

In the absorbent article, the adhesive portion may adhere the first sheet element and the second sheet element by heat sealing or ultrasonic welding.
According to the above configuration, the adhesiveness can be improved when the back side sheet element and the front side sheet element are made of the same material.

In the absorbent article, the adhesive portion may be configured to adhere the first sheet element and the second sheet element with a hot melt adhesive.
According to the above configuration, the adhesion can be improved even when the back side sheet element and the front side sheet element are made of different materials.

  The absorbent article includes a front body that covers the abdomen of the wearer and a back body that covers the back of the wearer, and the back sheet, the top sheet, and the absorber include the front body and the rear. Constituting an absorbent main body located in the crotch between the body and the top sheet, the top sheet is provided with a first flute portion constituted by the concave portion and the convex portion, of the front body and the back body At least one includes a waist gather, the waist gather includes an elastic member extending in the waist circumference direction, and cooperates with the elastic member to form a recess along a vertical direction intersecting the waist circumference direction. A second flute portion is formed in which a convex portion extends, and the concave portion and the convex portion are alternately arranged one by one along the trunk circumference direction, and the first flute portion and the second flute portion are Communicating configuration and It may be.

  According to the above configuration, since the first flute portion provided in the absorbent main body and the second flute portion provided in the waist gather communicate with each other, air containing moisture in the first flute portion passes through the second flute portion. Exhausted. Therefore, the air permeability during use can be improved.

  In the absorbent article, the waist gather is positioned on the skin side of the wearer on the skin side of the wearer, and on the side opposite to the skin side of the wearer with respect to the first waistline sheet element. A second waistline seat element, and a third waistline seat element positioned on the opposite side of the wearer's skin relative to the second waistline seat element, The elastic member in an elongated state is fixed between the third waistline sheet element along the waistline direction, and the first waistline sheet element and the second waistline sheet element are in the vertical direction. Further, the second flute portion may be configured by being bonded via adhesive portions that are separated from each other in the circumferential direction of the trunk and the elastic member contracts.

  According to the said structure, a 2nd flute part can be provided using the expansion-contraction of the elastic member which comprises a waist gather. Therefore, the air permeability during use can be improved.

  In the absorbent article, the waist gather is positioned on the skin side of the wearer on the skin side of the wearer, and on the side opposite to the skin side of the wearer with respect to the first waistline sheet element. A second waistline seat element, and a third waistline seat element located on the opposite side of the wearer's skin relative to the second waistline seat element, the first waistline seat element comprising: The sheet element is provided with a concavo-convex portion that extends in the vertical direction and is arranged in the trunk circumference direction in advance, and is provided with the concavo-convex part in a state in which an elastic member that extends in the trunk circumference direction is extended. The stretched elastic member is fixed along the waist direction between the second waistline sheet element and the third waistline sheet element, and the elastic member contracts to contract the first So that two flute parts are constructed. It may be.

  According to the above configuration, the elastic member in the stretched state is fixed between the second waistline sheet element and the third waistline sheet element, and the first waistline sheet element having an uneven portion is bonded thereto in advance. Therefore, even if the elastic member is extended, it is possible to prevent the uneven portion from extending and disappearing. Therefore, the air permeability during use can be improved.

The said absorbent article WHEREIN: The width | variety of the convex part of a said 2nd flute part is good also as a structure wider than the width | variety of the convex part of a said 1st flute part.
According to the above configuration, since the passage of the second flute is wider than the passage of the first flute, air such as moisture can be moved from the first flute to the second flute.

  ADVANTAGE OF THE INVENTION According to this invention, it became possible to provide the absorbent article which enabled improvement of the air permeability at the time of use.

The perspective view of the underpants type disposable diaper which materialized the absorptive article of the present invention. The disassembled perspective view of the underpants type disposable diaper which materialized the absorptive article of the present invention. The top view of an absorptive main body. The principal part perspective view of a top sheet. The schematic diagram which shows the manufacturing apparatus of a top sheet. The principal part perspective view which shows the modification which made the 1st sheet | seat element which has a waveform shape the front side sheet | seat element. The principal part perspective view which shows the modification which used the sheet | seat element which has a waveform shape for the back side sheet | seat element and the front side sheet | seat element. The principal part perspective view which shows the modification which used the sheet | seat element which has a corrugated shape for a back side sheet | seat element and a front side sheet | seat element, and has arrange | positioned the intermediate sheet | seat element between them. The principal part perspective view which shows the modification which used the embossed sheet | seat element for the front side sheet | seat element. The principal part perspective view which shows the modification which changed the width | variety of the adhesion part with a place. The perspective view of the underpants type disposable diaper of 2nd Embodiment. The top view which looked at the underpants type disposable diaper of 2nd Embodiment from the surface of the side which touches a wearer's skin. The longitudinal cross-sectional view which cut | disconnected FIG. 12 to the up-down direction in the figure. FIG. 14 is an enlarged cross-sectional view of a waist portion in FIG. 13. (A) is a disassembled perspective view of the waist part, (b) is a sectional view of the elastic member in the waist part in an expanded state, and (c) is a sectional view of the elastic member in the waist part in a contracted state. Sectional drawing of the state which the elastic member in the trunk periphery in 3rd Embodiment contracted. Sectional drawing of the state which the elastic member in the trunk periphery part in 3rd Embodiment extended | stretched. The top view of the sheet | seat structure formed in the linear form where the adhesion part in 3rd Embodiment continued. The top view of the sheet | seat structure in which the adhesion part was formed in dotted line form. The top view of the sheet | seat structure which provided the non-bonding part in several places of the adhesion part. Sectional drawing of the sheet | seat structure which provided the wide convex part and the narrow convex part alternately. Sectional drawing of the sheet | seat structure which expanded the width | variety of the adhesion part.

With reference to FIG. 1 thru | or FIG. 22, the underpants type disposable diaper in one Embodiment which actualized the absorbent article in this invention is demonstrated.
[First Embodiment]
As shown in FIG. 1, a pants-type disposable diaper 10 (hereinafter simply referred to as “diaper 10”) has a front body 10F having a shape that follows the shape of the wearer's abdomen and a shape that follows the shape of the wearer's back. And a crotch part 10C connecting the front body 10F and the back body 10R.

  In the front body 10F, the side opposite to the crotch 10C constitutes a waist part 10W that surrounds a part around the wearer's waist, and has a waist opening 10A at the upper end. The left and right ends of the front body 10F, the left and right ends of the back body 10R, and the left and right ends of the crotch 10C are defined as a pair of left and right leg openings 10L having a shape surrounding the thigh portion of the wearer. It is composed. Further, the left and right end portions of the front body 10F and the back body 10R in the trunk periphery direction are joint portions 11.

  FIG. 2 is an exploded perspective view of a pants-type disposable diaper. The front body 10F is composed of a first exterior body 12F, and the back body 10R is composed of a second exterior body 12R. Hereinafter, the first exterior body 12F and the second exterior body 12R are simply referred to as an exterior body 12 collectively.

  The exterior body 12 has a rectangular shape whose longitudinal direction is the direction around the trunk, and is configured by sandwiching an elastic member 15 between sheets 13S and 13B constituting the exterior body 12. As an example, the sheets 13S and 13B constituting the exterior body are nonwoven fabrics made of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins as raw materials, and are liquid-permeable sheets and liquid-impermeable sheets. There may be. The elastic member 15 is an elastic body formed of one or more materials selected from natural rubber, synthetic rubber, urethane, and the like, and is formed in a thread shape, a string shape, a net shape, or a flat shape. A plurality of elastic members 15 are arranged in parallel to each other along the trunk circumference direction.

  As shown in FIG. 3, the first exterior body 12F and the second exterior body 12R are connected by an absorbent main body 16 constituting the crotch portion 10C. The absorptive main body 16 has a rectangular shape whose longitudinal direction is the front-rear direction. The absorbent main body 16 includes a back sheet 17 having liquid impermeability, an absorber 18, and a top sheet 19 having liquid permeability. In the diaper 10, the top sheet 19 is disposed on the inner side in contact with the wearer's skin, the back sheet 17 is disposed on the outer side, and the back sheet 17, the absorber 18, and the top sheet 19 overlap in this order from the outer side. Furthermore, a cover sheet 17A made of a non-woven fabric can be arranged outside the back sheet 17 in order to improve the feeling of touch (see FIG. 2).

  The material forming the back sheet 17 is, for example, a film made of polyethylene resin having liquid impermeability. The back sheet 17 is formed with a large number of fine holes to ensure air permeability.

  The absorber 18 has a band shape so as to straddle the front body 10F, the crotch 10C, and the back body 10R. The material forming the absorbent body 18 is an absorbent material such as flap pulp, superabsorbent polymer (SAP), hydrophilic sheet or the like. And the absorber 18 is wrapped with the core wrap comprised with a hydrophilic sheet | seat as an example, and is arrange | positioned between the back seat | sheet 17 and the top sheet | seat 19, and is joined.

The outer surface of the region overlapping the exterior body 12 in the front-rear direction of the absorbent main body 16 becomes an adherend to be adhered to the sheet 13B on the back side of the exterior body 12.
The absorbent main body 16 is provided with three-dimensional gathers at both ends along the front-rear direction. The three-dimensional gather is configured by disposing side sheets 14S on both ends of the top sheet 19 along the front-rear direction and elastic members 14E along the front-rear direction on the side sheet 14S. In the three-dimensional gather, when the elastic member 14E contracts, the side seat 14S rises toward the wearer's skin contact direction, and is positioned around the leg opening 10L.

  As shown in FIG. 4, the top sheet 19 has liquid permeability and is composed of two sheet elements. Specifically, a back sheet element 21 as a first sheet element positioned adjacent to the absorbent body 18 and a front sheet element 26 as a second sheet element in contact with the wearer's skin are provided.

  The back-side sheet element 21 has at least a part of liquid permeability in order to allow the liquid to pass through the absorber 18. For example, the back side sheet element 21 may have hydrophilicity as a whole, or may partially have a hydrophobic portion while being entirely hydrophilic. When a hydrophobic portion is partially provided on the hydrophilic sheet, the liquid that has permeated through the front side sheet element 26 can be dispersed in the hydrophobic portion and then absorbed by the absorber 18 through the hydrophilic portion. As an example, such a back sheet element 21 can be configured by entirely forming a hydrophilic sheet, partially overlapping a hydrophobic sheet, or partially applying a hydrophobic treatment. Moreover, as an example, the whole can be constituted by a hydrophobic sheet, a plurality of holes can be partially provided, and a hydrophilic treatment can be applied.

  The material forming the back sheet element 21 is one or more materials selected from, for example, a woven fabric, a nonwoven fabric, and a porous film. Moreover, the back side sheet element 21 is made of, for example, a non-woven fabric having liquid permeability composed of fibers of thermoplastic resin such as polypropylene, polyethylene, polyester, and nylon and subjected to hydrophilic treatment. It is done. Preferably, the back side sheet element 21 is, for example, an air-through nonwoven fabric or a spunbond nonwoven fabric.

  The back-side sheet element 21 as described above has a concave portion 23 and a convex portion 22 extending in the front-rear direction of the diaper 10, and the concave portion 23 and the convex portion 22 are along a waistline direction orthogonal to the front-rear direction of the diaper 10. Are arranged alternately one by one. And the recessed part 23 and the convex part 22 have a waveform shape in the cross section of a trunk periphery direction. As shown by an arrow A in FIG. 4, the liquid 28 that has passed through the front side sheet element 26 is dispersed in the front-rear direction along the recess 23 and is absorbed by the absorbent body 18 through the back side sheet element 21.

  Since the front side sheet element 26 is a sheet element in contact with the wearer's skin, the whole is composed of a hydrophilic sheet and can immediately absorb the liquid. The front side sheet element 26 is also formed of substantially the same material as the back side sheet element 21. The front-side sheet element 26 is a sheet element that is not formed into a corrugated shape like the back-side sheet element 21 and does not have an uneven structure. The convex portion 22 of the back-side sheet element 21 is brought into contact with the front-side sheet element 26 and bonded at the contacted portion to form a linear bonding portion 24. In addition, the adhesion part 24 may be comprised by the continuous line shape, and may be comprised by the dotted line shape.

  Adhesion between the convex portion 22 and the front side sheet element 26 is performed by heat sealing or ultrasonic welding. Further, the contact between the convex portion 22 and the front side sheet element 26 is not a point contact as in the case of the embossing but a line contact, and the contact area is increased as compared with the point contact as in the case of the embossing convex portion. Therefore, bonding with a hot melt adhesive is also possible. Since the top sheet 19 as described above is composed of the back-side sheet element 21 and the front-side sheet element 26 having a corrugated shape, the top sheet 19 is linearly formed along the front-rear direction of the diaper 10 between the absorbent body 18. The gap 27 is provided.

  The top sheet 19 configured as described above can be manufactured as follows. Specifically, a corrugated shape is formed on the back sheet element 21, and then the convex portion 22 of the back sheet element 21 and the front sheet element 26 are joined. In FIG. 5, the manufacturing apparatus 30 of the top sheet 19 is shown. The manufacturing apparatus 30 includes a first concavo-convex roll 31 provided with a convex portion 31a that imparts a corrugated concavo-convex shape to the back-side sheet element 21 fed from the original fabric, and a second concavo-convex portion provided with a concave portion 32a with which the convex portion 31a meshes A roll 32 and a plain roll 33 that joins the back side sheet element 21 and the front side sheet element 26 are provided.

  The back side sheet element 21 sent out from the original fabric is supplied between the first uneven roll 31 and the second uneven roll 32, and the back sheet element 21 is sandwiched between the convex part 31a and the concave part 32a. The 2nd uneven | corrugated roll 32 is connected with a suction device, and the back side sheet element 21 is made into the shape which followed the shape of the recessed part 32a by being attracted | sucked by the suction hole 34 in the recessed part 32a. At this time, the back sheet element 21 is pressed against the convex portion 31a. Thereby, the convex part 22 and the recessed part 23 are continuously shape | molded by the back side sheet | seat element 21, and it is made into a corrugated shape. The size and shape of the convex portion 22 and the concave portion 23 are determined by the convex portion 31a and the concave portion 32a.

  The back side sheet element 21 fed from between the first uneven roll 31 and the second uneven roll 32 is overlapped with the front side sheet element 26 supplied to the plain roll 33 from the original fabric, and then the second uneven roll 32 and It is sandwiched between the plain rolls 33. The plain roll 33 has a flat surface and includes a heating device. The back side sheet element 21 and the front side sheet element 26 sandwiched between the second concavo-convex roll 32 and the plain roll 33 are heat-sealed by being heated and pressurized.

As described above, according to the first embodiment, the following effects can be obtained.
(1-1) When the front-side sheet element 26 is provided with a concavo-convex structure in a dotted pattern by, for example, embossing, a plurality of recesses that form a gap with the skin surface of the front-side sheet element 26 are located around Since it is surrounded by the convex portions, the air permeability is hindered by the peripheral convex portions. When the wearer's body pressure is applied, the convex portion is crushed and there is no gap, and the air permeability is further lowered.

  In this respect, since the back side sheet element 21 having a corrugated shape exists and the front side sheet element 26 exists thereon, the gap 27 can be secured while making the top sheet 19 bulky. And the back side sheet | seat element 21 can receive a wearer's body pressure dispersively by a line contact instead of a point contact via the front side sheet | seat element 26, and the physical intensity | strength of the convex part 22 improves. Therefore, the convex portion 22 is crushed and the gap 27 is hardly blocked. Thereby, moisture etc. can be discharged | emitted from the part of trunk periphery opening part 10A through the clearance gap 27 extended in the front-back direction of the diaper 10. FIG. In this respect, the diaper 10 can improve air permeability (see arrow B in FIG. 3).

  (1-2) In the diaper 10, the back sheet element 21 having the corrugated shape of the top sheet 19 is disposed on the absorber 18 side, and the side in contact with the skin of the wearer is the front sheet element 26 having no uneven structure. ing. Therefore, the liquid 28 such as urine can be immediately absorbed by the front sheet element 26.

  (1-3) Since the wearer's body pressure applied to the absorbent body 18 is dispersed by the corrugated shape of the back-side sheet element 21, the liquid 28 once absorbed by the absorbent body 18 returns to the wearer's skin side. This can be suppressed.

  (1-4) The liquid 28 that has passed through the front sheet element 26 is temporarily held in the gap 27, spreads and diffuses in the front-rear direction of the diaper 10 along the gap 27, and then passes through the back sheet element 21 to absorb 18. To be absorbed. Therefore, the liquid 28 can be absorbed by the absorber 18 without deviation.

  (1-5) The adhesive portion 24 between the convex portion 22 of the back side sheet element 21 and the front side sheet element 26 has hydrophobicity or water repellency. Therefore, it is possible to suppress the liquid 28 once absorbed by the absorber 18 from being returned by the bonding portion 24.

The first embodiment can be implemented with appropriate modifications as follows.
In the case where the bonding portion 24 is performed by heat sealing or ultrasonic welding, the back side sheet element 21 and the front side sheet element 26 may be made of different materials. However, if the bonding portion 24 is formed of the same material, the adhesion may be improved. it can.

  When the adhesive portion 24 is a hot melt adhesive, the back side sheet element 21 and the front side sheet element 26 may be the same material or different materials. When different materials are used, the front side sheet element 26 is a non-woven fabric as described above, and the back side sheet element 21 is a resin sheet such as a polyethylene resin film having liquid imperviousness like the back sheet 17, and the resin sheet On the other hand, in order to ensure air permeability and liquid permeability, a configuration in which many fine holes are formed may be employed. In this way, even when the materials of the back side sheet element 21 and the front side sheet element 26 are different, the hot melt adhesive can be used for reliable bonding. Thereby, the freedom degree of material selection of the back side sheet | seat element 21 and the front side sheet | seat element 26 can be raised.

As shown in FIG. 6, contrary to the configuration of the top sheet 19 described above, the front side sheet element 26 is configured with a first sheet element having a corrugated structure, and the back side sheet element 21 is not having an uneven structure. You may comprise a sheet element. Also in this case, due to the corrugated structure of the front side seat element 26, the top sheet 19 can be made bulky, the wearer's body pressure can be dispersed, and air permeability can be ensured. Furthermore, since the contact part with a wearer's skin becomes only the convex part 22, a contact area with skin can be reduced, friction can be reduced with respect to a wearer's skin, and it can be made low irritation | stimulation.
In this case, the absorbent body 18 and the back side sheet element 21 may be combined with each other at the bonding portion 24 between the back side sheet element 21 and the front side sheet element 26.

  -As shown in FIG. 7, you may comprise both the back side sheet | seat element 21 and the front side sheet | seat element 26 with the 1st sheet | seat element which has a corrugated structure. In this case, both the back-side sheet element 21 and the front-side sheet element 26 have a corrugated structure, so that the gap 27 is increased and the air permeability can be significantly improved.

  As shown in FIG. 8, both the back-side sheet element 21 and the front-side sheet element 26 are constituted by a first sheet element having a corrugated structure, and an intermediate sheet element is provided between the back-side sheet element 21 and the front-side sheet element 26. 41 may be arranged. Thereby, air permeability can be secured by the gap 42 constituted by the back side sheet element 21 and the intermediate sheet element 41 and the gap 43 constituted by the front side sheet element 26 and the intermediate sheet element 41. The liquid can be diffused in the gaps 42 and 43.

  The intermediate sheet element 41 may be composed of a sheet element containing a superabsorbent polymer, a so-called SAP sheet. Such a sheet | seat element can be implement | achieved by apply | coating a superabsorbent polymer, for example to a nonwoven fabric, or comprising a nonwoven fabric with a polymeric absorption fiber. Thereby, the intermediate sheet element 41 can be provided with a liquid absorbing function, and the liquid absorbing function can be improved.

  As shown in FIG. 9, the back side sheet element 21 is constituted by a first sheet element having a corrugated structure, and the front side sheet element 26 is constituted by an embossed sheet element in which uneven structures are provided in a dotted pattern by embossing. May be. Thereby, a contact area with a wearer's skin can be reduced, friction can be reduced with respect to a wearer's skin, and it can be made low irritation | stimulation. The front side sheet element 26 may be composed of one embossed sheet, or the embossed sheet may be composed of two sheet elements stacked on a second sheet element not having an uneven structure, and may be composed of three sheets as a whole. And you may make it adhere | attach with the 2nd sheet | seat element overlapped with the embossing sheet in the part of a convex part seeing from the inner surface of embossing.

  -As another example, the structure which laminates | stacks the laminated sheet which laminated | stacked two or more nonwoven fabric sheets which do not have an unevenness | corrugation on a 1st sheet | seat element may be sufficient. In such a case, the first sheet element may be either the front sheet element 26 or the back sheet element 21.

  FIG. 10 is a modification of the top sheet 19 shown in FIG. 4, in which the back sheet element 21 is composed of a first sheet element having a corrugated structure, and the front sheet element 26 is a second sheet element having no concavo-convex structure. It consists of. And the width | variety of the adhesion part 24 comprised in the part which the convex part 22 and the front side sheet | seat element 26 contacted is expanded. For example, when the width of the bonding portion 24 is widened, the region having hydrophobicity or water repellency is widened by the bonding portion 24. By adjusting the area of the bonding portion 24, the balance between the liquid absorbability and the liquid return can be adjusted.

  -As for the corrugated shape, the denser the convex portion 22, the higher the physical strength against the load. In the diaper 10, the body pressure with respect to the diaper 10 is reduced in the rupture portion, and the body pressure is increased in the heel portion on both sides of the rupture portion. Therefore, in the top sheet 19, the portions corresponding to the ridges on both sides of the cracked portion make the convex portions 22 denser than the portions corresponding to the ruptured portion. As an example, the interval between the convex portions 22 adjacent to each other is narrowed, and the width of the bonding portion 24 is narrowed. Thereby, the balance of liquid absorptivity and liquid return can be further adjusted while adjusting the physical strength of the corrugated shape.

  The corrugated shape constituted by the convex portion 22 and the concave portion 23 may be provided along a direction that completely coincides with the front-rear direction of the diaper 10, or moisture from the waist opening 10 </ b> A through the gap 27. May be slightly inclined with respect to the front-rear direction.

  -The convex part 22 and the recessed part 23 may be provided continuously over the edge part which comprises 10 A of trunk periphery opening parts in the front-back direction of the diaper 10, and are interrupted regularly or irregularly May be. For example, the convex part 22 may be interrupted, and one concave part 23 may be connected with the adjacent concave part 23. Thereby, the path | route through which the liquid hold | maintained at the recessed part 23 flows can be lengthened, and a liquid can be spread | diffused to the near side.

  -The disposable diaper may be a tape-type diaper. Moreover, the disposable diaper for adults, such as an elderly person and a disabled person for infants or those who require nursing care, may be used. Furthermore, the absorbent article may be a urine pad, a light incontinence pad, a sanitary napkin, or the like.

[Second Embodiment]
As shown in FIGS. 11 and 12, the diaper 100 of the second embodiment has a flute structure not only in the absorbent main body but also in the trunk periphery.

  Specifically, the diaper 100 includes a front body 100F, a back body 100R, and a crotch portion 100C that connects the front body 100F and the back body 100R. In the front body 100F, the side opposite to the crotch part 100C constitutes a waist part 100W that surrounds a part around the waist of the wearer, and is provided with a waist part opening 100A at the upper end. Also, the left and right ends of the front body 100F, the left and right ends of the back body 100R, and the left and right ends of the crotch 100C are defined as a pair of left and right leg openings 100L having a shape surrounding the wearer's thigh. It is composed. In addition, the left and right end portions of the front body 100F and the back body 100R in the trunk periphery direction are joint portions 101. The front body 100F is composed of a first exterior body 102F, and the back body 100R is composed of a second exterior body 102R.

  As shown in FIGS. 12 and 13, the first exterior body 102 </ b> F and the second exterior body 102 </ b> R have a shape whose longitudinal direction is the trunk periphery direction. The exterior sheet 111 constituting the exterior body is, for example, a nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material, and is a liquid-permeable sheet or liquid-impermeable sheet. May be. And the exterior sheet | seat 111 is one sheet | seat element, and it is return | folded by the trunk periphery opening part 100A, and the elastic member 105 is pinched | interposed between sheets. In addition, in the exterior sheet 111, the sheet element located on the inner side which is the skin side of the wearer is the second waistline sheet element 111A, and the sheet element located on the outside is the third waistline sheet element 111B. A plurality of elastic members 105 are arranged along the waist direction in parallel between each other between the second waistline sheet element 111A and the third waistline sheet element 111B. The elastic member 105 expands and contracts to form a waist gather in the waist portion 100W.

  One or a plurality of Tammy elastic members 105A are fixed to the crotch portion 100C side of the waistline portion 100W. Specifically, the Tammy elastic member 105A is sandwiched and fixed between the third waistline sheet element 111B and the inner sheet 105B, which are part of the exterior sheet 111. Thereby, Tammy elastic member 105A expands and contracts on the lower side of waist part 100W, thereby forming a Tammy gather.

  The first exterior body 102F and the second exterior body 102R are connected by the absorbent main body 16 constituting the crotch part 100C. The absorptive main body 16 has a rectangular shape whose longitudinal direction is the front-rear direction, and has substantially the same configuration as the absorptive main body 16 of the first embodiment. The absorbent main body 16 includes a back sheet 17 having liquid impermeability, an absorber 18, and a top sheet 19 having liquid permeability. In the diaper 100, the top sheet 19 is disposed on the inner side in contact with the wearer's skin, the back sheet 17 is disposed on the outer side, and the back sheet 17, the absorber 18, and the top sheet 19 are overlapped in this order from the outer side. For example, the absorbent body 18 is wrapped by a core wrap 18 </ b> A formed of a hydrophilic sheet, and is disposed and bonded between the back sheet 17 and the top sheet 19. Further, on the outside of the back sheet 17, a cover sheet 17A made of a non-woven fabric is arranged in order to improve the feeling of touch. The outer surface of the region overlapping with the first exterior body 102F and the second exterior body 102R in the front-rear direction of the absorbent main body 16 becomes an adherend to the first exterior body 102F and the second exterior body 102R.

  The top sheet 19 has the same configuration as the top sheet 19 of the first embodiment. That is, as shown in FIG. 13 and FIG. 14, the top sheet 19 includes a back sheet element 21 as a first sheet element and a front sheet element 26 as a second sheet element in contact with the wearer's skin. (See FIG. 4).

  The back side sheet element 21 has a concave portion 23 and a convex portion 22 extending in the front-rear direction of the diaper 100, and the concave portion 23 and the convex portion 22 are arranged one by one along the waist circumference direction orthogonal to the front-rear direction of the diaper 10. It is configured to be arranged alternately. As described above, the top sheet 19 includes the first flute portion 106. And the recessed part 23 and the convex part 22 have a waveform shape in the cross section of a trunk periphery direction. The liquid 28 that has passed through the front side sheet element 26 is dispersed in the front-rear direction and is absorbed by the absorber 18 through the back side sheet element 21 as indicated by an arrow A in FIGS. 4 and 14.

  The front side sheet element 26 is a sheet element that is in contact with the skin of the wearer, and is a sheet element that does not have an uneven structure. The convex portion 22 of the back-side sheet element 21 is brought into contact with the front-side sheet element 26 and bonded at the contacted portion to form a linear bonding portion 24. Adhesion between the convex portion 22 and the front side sheet element 26 is performed by heat sealing or ultrasonic welding.

  As shown in FIG. 14, in the top sheet 19 as described above, the front side sheet element 26 exists on the back side sheet element 21 having a corrugated shape, so that the gap 27 is secured while making the top sheet 19 bulky. can do.

  The waistline portion 100W sandwiches the elastic member 105 between the second waistline sheet element 111A and the third waistline sheet element 111B of one exterior sheet 111 to form a sheet structure 131A, and the sheet structure 131A. On the other hand, the first waistline seat element 131 as a cushion forming sheet is overlaid. Thus, the second flute portion 107 is provided in the waistline portion 100W. The first waistline sheet element 131 is a sheet element that is in contact with the wearer's skin and is a sheet element that does not have an uneven structure.

  The elastic member 105 is sandwiched and fixed between the second waistline sheet element 111A and the third waistline sheet element 111B of the single exterior sheet 111 in an expanded state. Further, the Tammy elastic member 105A is sandwiched and fixed between the third waistline sheet element 111B and the inner sheet 105B in an expanded state. The elastic member 105 and the Tammy elastic member 105A are fixed by applying an adhesive to the elastic member itself, and sandwiching and fixing the elastic member to which the adhesive is applied. As an example, an adhesive is applied to either or both sheets sandwiching the elastic member, and then the elastic member in an expanded state is sandwiched and fixed between these sheets.

  As shown in FIGS. 15A and 15B, the first waistline sheet element 131 or the second waistline is used to overlap the first waistline sheet element 131 on the sheet structure 131A in which the elastic member 105 is stretched. An adhesive portion 132 is provided on the sheet element 111A. The adhesive portion 132 is formed by applying an adhesive such as a hot melt adhesive in the vertical direction and spaced apart from each other in the circumferential direction. Note that the first waistline sheet element 131 and the second waistline sheet element 111A may be bonded together by heat sealing or ultrasonic sealing. As an example, the adhesive portions 132 are provided at equal intervals in the trunk periphery direction. Thereafter, the extended state of the elastic member 105 is released.

  As shown in FIG. 15C, the elastic member 105 is fixed to the second waistline sheet element 111A and the third waistline sheet element 111B. Between the parts 132, the uneven | corrugated | grooved part 133 is provided in the up-down direction, and mutually spaced apart in the trunk periphery direction, and the 2nd flute part 107 is provided. As a result, air such as moisture passes through the uneven portion 133 and is discharged in the direction of the trunk periphery opening 100A (see arrow B in FIG. 14).

  As shown in FIG. 14, the first waistline seat at the connecting portion between the end region of the first flute portion 106 formed on the top sheet 19 and the second flute portion 107 formed on the waistline portion 100W. The element 131 is bonded to the second waistline sheet element 111 </ b> A by the bonding portion 132 in a region where the elastic member 105 is disposed in the waistline direction. That is, in the first waistline sheet element 131, the proximal end portion located in the waistline portion 100W is bonded to the second waistline sheet element 111A, and the distal end portion 121 near the crotch portion 100C is the absorbent main body 16. It is made non-adhesive just by overlapping both ends. The gap 127 of the second flute portion 107 communicates with the gap 27 of the first flute portion 106 (see arrow C in FIG. 14). Further, the width of the gap 127 of the second flute portion 107 is formed wider than the width of the gap 27 of the first flute portion 106. The gap 127 is wider than the gap 27 so that air such as moisture can smoothly travel from the gap 27 to the gap 127. Further, a gap 128 is provided between the front end portion 121 of the first waistline sheet element 131 and the front side sheet element 26 of the top sheet 19, and the gap 128 communicates with the gaps 27 and 127.

  In the first waistline sheet element 131, the front end portion 121 close to the crotch portion 100C can be configured to be adhered to the entire end portion of the absorbent main body 16, or can be partially adhered. It can also be configured to be. In the case of partial adhesion, air permeability can be ensured by providing an adhesive portion in a straight line or dotted line shape in the vertical direction. Of course, you may make it provide an adhesion part in the trunk periphery direction.

As described above, according to the second embodiment, the following effects can be obtained.
(2-1) The gap 27 of the first flute portion 106 and the gap 127 of the second flute portion 107 communicate with each other. Therefore, the moisture in the gap 27 of the first flute portion 106 proceeds to the gap 127 of the uneven portion 133 of the second flute portion 107 and is exhausted from the end portion where the trunk opening 100A is formed. Also, the moisture between the wearer's skin and the absorbent main body 16 is second due to the gap 128 between the front end side portion of the first waistline seat element 131 and the front side seat element 26 of the top sheet 19. The flute 107 enters the gap 127 of the concavo-convex portion 133 and is exhausted from the end where the trunk opening 100A is formed. (See arrow D in FIG. 14).
(2-2) Since the contact portion with the wearer's skin becomes an uneven portion by the second flute portion 107 around the waist, the contact area with the wearer's skin can be reduced. On the other hand, friction can be reduced and low irritation can be achieved.
(2-3) The first waistline sheet element 131 and the second waistline sheet element 111A are bonded in a continuous linear shape. Therefore, the first waistline sheet element 131 can be firmly bonded to the second waistline sheet element 111A.
(2-4) Since the gap 127 of the second flute portion 107 is wider than the gap 27 of the first flute portion 106, air such as moisture is passed from the gap 27 of the first flute portion 106 to the gap of the second flute portion 107. 127 can be moved smoothly.

[Third Embodiment]
The third embodiment is a modification of the second embodiment. As shown in FIG. 16, the waistline portion 100 </ b> W sandwiches the elastic member 105 between the second waistline sheet element 111 </ b> A and the third waistline sheet element 111 </ b> B of one exterior sheet 111, thereby A tammy elastic member 105A is sandwiched between the element 111B and the inner sheet 105B. The sheet structure 131 </ b> A configured as described above is provided with the second flute portion 107 by overlapping the first waistline sheet element 141. As shown in FIG. 17, the first waistline sheet element 141 has a concave portion and a convex portion extending in the vertical direction that is also the front-rear direction of the diaper 100, and the concave portion and the convex portion are orthogonal to the vertical direction of the diaper 100. The projections and depressions 142 alternately arranged one by one along the trunk circumference direction are provided in advance. Then, the convex portion 143 protruding in the direction of the second waistline sheet element 111 </ b> A is brought into contact with the second waistline sheet element 111 </ b> A, and the contacted portion becomes an adhesive portion 144. As shown in FIG. 18, the second waistline sheet element 111 </ b> A and the convex portion 143 are bonded in a straight line continuous in the vertical direction along the top of the convex portion 143. Adhesion between the convex portion 143 and the second waistline sheet element 111A is performed by heat sealing or ultrasonic welding. Further, the contact between the convex portion 143 and the second waistline sheet element 111A is not a point contact as in the case of the embossing, but is a line contact, and is a line compared with the point contact as in the case of the embossing convex portion. Since the contact area increases and the contact area also increases, bonding with a hot melt adhesive is possible.

  In order to superimpose the first waistline sheet element 141 having the concavo-convex portion 142 on the sheet structure 131A in which the elastic member 105 is in the extended state, the convexity of the first waistline sheet element 141 or the second waistline sheet element 111A. An adhesive portion 144 is provided on the portion 143. Thereafter, the extended state of the elastic member 105 is released. As shown in FIG. 16, the elastic member 105 fixed in an expanded state between the second waistline sheet element 111 </ b> A and the third waistline sheet element 111 </ b> B of the exterior sheet 111 contracts, thereby causing an uneven portion. 142 is a narrow unevenness with a narrow width. In addition, the second waistline sheet element 111A and the third waistline sheet element 111B are also slightly corrugated. Since the first waistline seat element 141 includes the uneven portion 142 in advance, the first waistline seat element 111A and the first waistline seat element 111A can be used regardless of the waist circumference of the wearer, that is, regardless of the degree of expansion and contraction of the elastic member 105. A linear gap 145 is provided between the waistline sheet element 141 along the vertical direction of the diaper 100. Air containing moisture and the like is discharged from the gap 27 of the first flute portion 106 through the gap 145 of the second flute portion 107 in the direction of the trunk opening 100A.

According to the third embodiment as described above, the following effects can be obtained.
(3-1) In the waistline portion 10W, the elastic member 105 in the stretched state is fixed in a stretched state between the second waistline sheet element 111A and the third waistline sheet element 111B, and the first waistline sheet element 141 Since it has the uneven portion 142 in advance, even if the elastic member 105 is extended to the maximum, the uneven portion 142 is prevented from extending and the uneven portion is eliminated. Therefore, even if the wearer who has a waist circumference larger than the reference waist circumference wears the diaper 100, the unevenness of the uneven portion 142 is maintained and the gap 145 can be prevented from being lost. Thereby, the diaper 100 can ensure the air permeability through the gap 145 regardless of the waist circumference of the wearer, the cushioning property is maintained, and the fit feeling in the waist portion 100W can be improved. it can.
(3-2) The gap 27 of the first flute portion 106 and the gap 145 of the second flute portion 107 communicate with each other. Accordingly, the moisture in the gap 27 of the first flute portion 106 proceeds to the gap 145 of the second flute portion 107 and is exhausted from the end portion where the trunk periphery opening 100A is formed. Further, moisture between the skin and the absorbent main body 16 is also caused by the second flute portion 107 from the gap 128 between the front end side portion of the first waistline sheet element 141 and the front side seat element 26 of the top sheet 19. , And exhausted from the end portion where the waist opening 100A is formed (see arrow D in FIG. 14).

Note that the third embodiment can be implemented with appropriate modifications as follows.
As shown in FIG. 19, in the sheet structure 131A, the adhesive portions 144 and the non-adhesive portions 146 are alternately arranged at the adhesive portions between the second waistline sheet element 111A and the convex portions 143 of the first waistline sheet element 141. It is provided in the form of a dotted line. By providing the bonding portion 144 in a dotted line shape, the amount of adhesive applied can be reduced. Moreover, the ventilation path comprised by the clearance gap 145 provided between the adjacent convex parts 143 can be connected by the part of the non-adhesion part 146, and the further improvement of air permeability can be implement | achieved. Such a concept can be applied to the second embodiment.

  In FIG. 20, some of the linear adhesive portions 144 between the second waistline sheet element 111 </ b> A and the convex portion 143 of the first waistline sheet element 141 are non-adhesive portions 146, and ventilation between the adjacent convex portions 143 is performed. I try to connect the road. According to such a configuration, air permeability can be improved while sufficiently maintaining the adhesive strength of the first waistline sheet element 141 to the second waistline sheet element 111A. Such a concept can be applied to the second embodiment.

  In FIG. 21, in the uneven | corrugated | grooved part 142 of the 1st trunk periphery sheet | seat element 141, seeing from a wearer's skin side, the width | variety of the 1st convex part 147x and the 2nd convex part 147y which mutually adjoin is different. Here, the first convex portion 147x is configured to be wider than the second convex portion 147y. As described above, since the narrow second convex portion 147y exists between the wide first convex portions 147x, both sides of the first convex portion 147x are supported by the second convex portions 147y, and the first convex portion 147x. Can be prevented from being crushed and deterioration of air permeability can be suppressed. Such a concept can be applied to the second embodiment.

  In FIG. 22, the width of the bonding portion 144 formed at the portion where the convex portion 143 and the second waistline sheet element 111A are in contact with each other is increased. Thereby, the intensity | strength of the uneven | corrugated | grooved part 142 which comprises the clearance gap 145 used as a ventilation path can be raised. Such a concept can be applied to the second embodiment.

  When the bonding portion 144 is performed by heat sealing or ultrasonic welding, the second waistline sheet element 111A and the first waistline sheet element 141 may be made of different materials, but the one formed of the same material is bonded. The sex can be improved. Such a concept may be applied to the second embodiment.

  When the bonding portion 144 is a hot melt adhesive, the first waistline sheet element 141 and the second waistline sheet element 111A may be the same material or different materials. When different materials are used, the first waistline sheet element 141 is made of a non-woven fabric having air permeability as described above, and the second waistline sheet element 111A is made of a polyethylene resin having liquid impermeability like the backsheet 17. It is good also as resin sheets, such as a film. As described above, even when the materials of the first waistline sheet element 141 and the second waistline sheet element 111A are different from each other, the hot melt adhesive can be used for reliable bonding. Thereby, the freedom degree of material selection of the 1st waistline sheet | seat element 141 and the 2nd waistline sheet | seat element 111A can be raised. Such a concept may be applied to the second embodiment.

  The concavo-convex portion 142 may be provided along a direction that completely coincides with the vertical direction of the diaper 100, or slightly upward and downward if moisture and the like can be exhausted from the waist opening portion 100A through the gap 145. It may be inclined with respect to.

The second waistline sheet element 111A and the third waistline sheet element 111B may be separate sheets.
-The width | variety of the clearance gap of a 2nd flute part may be the same as the width | variety of the clearance gap of a 1st flute part, as long as air permeability is securable.
-The structure of a 2nd flute part is not limited to the structure of 2nd Embodiment and 3rd Embodiment.

-As a disposable diaper, a tape-type disposable diaper may be sufficient. Moreover, the disposable diaper for adults, such as an elderly person and a disabled person for infants or those who require nursing care, may be used. The pants-type disposable diaper is not limited to the separated type in which the outer body 12F of the front body 10F and the outer body 12R of the rear body 10R are separated, but an integrated type in which the outer body is integrated from the front body 10F to the rear body 10R. It may be.
The waist gather is not limited to being provided on both the front body 10F and the back body 10R, but may be configured to be provided on at least one of the front body 10F and the back body 10R. For example, in a tape-type diaper, a waist gather may be provided only on the back body.

10A ... opening, 10C ... crotch, 10F ... front body, 10L ... waist circumference opening, 10R ... back body, 10W ... waist circumference, 11 ... joint, 12 ... exterior body, 12F ... first exterior body, 12R ... second exterior body, 13B ... sheet, 13S ... sheet, 14E ... elastic member, 14S ... side sheet, 15 ... elastic member, 16 ... absorbent body, 17 ... back sheet, 17A ... cover sheet, 18 ... absorber , 19 ... Top sheet, 21 ... Back side sheet element, 22 ... Convex part, 23 ... Concave part, 24 ... Adhesive part, 26 ... Front side sheet element, 27 ... Gap, 30 ... Manufacturing apparatus, 31 ... First uneven roll, 31a ... Convex part, 32 ... second uneven roll, 32a ... concave part, 33 ... plain roll, 34 ... suction hole, 41 ... intermediate sheet element, 42 ... gap, 43 ... gap, 100A ... opening, 100C ... crotch part, 100F ... Previous , 100L ... opening, 100R ... back body, 100W ... trunk circumference, 101 ... joint, 102F ... first exterior body, 102R ... second exterior body, 105 ... elastic member, 105A ... Tammy elastic member, 105B ... Inner sheet, 106 ... first flute portion, 107 ... second flute portion, 111 ... exterior sheet, 111A ... sheet element, 111B ... sheet element, 121 ... front end side portion, 127 ... gap, 128 ... gap, 131 ... sheet Element 131A ... Sheet structure 132 ... Adhesion part 133 ... Concavity and convexity 141 ... Sheet element 142 ... Concavity and convexity 143 ... Convex part 144 ... Adhesion part 145 ... Gap 146 ... Non-adhesion part 147x ... 1st convex part, 147y ... 2nd convex part.

Claims (12)

A liquid-impermeable backsheet;
A liquid-permeable top sheet located closer to the wearer's skin than the back sheet;
Comprising an absorber positioned between the top sheet and the back sheet;
The top sheet is configured by overlapping a plurality of sheet elements,
The plurality of sheet elements include a front side sheet element located on the skin side of the wearer and a back side sheet element located adjacent to the absorber,
The plurality of sheet elements include a first sheet element and a second sheet element bonded to the first sheet element,
At least one of the front side sheet element and the back side sheet element is a first sheet element;
In the first sheet element, the concave portion and the convex portion extend along the front-rear direction of the absorbent article, and are alternately arranged one by one along the waist circumference direction of the absorbent article, The convex portion has a corrugated shape in a cross section in the waist circumference direction,
The second sheet element is an absorbent article in which a position in contact with the convex portion of the first sheet element is an adhesive portion bonded to the first sheet element. The back sheet element is the first sheet element;
The absorbent article according to claim 1, wherein the front sheet element is the second sheet element. The absorbent article according to claim 2, wherein the second sheet element is a non-woven sheet element that does not have the concave portion and the convex portion. The absorbent article according to claim 2, wherein the second sheet element has a configuration similar to that of the first sheet element. The absorbent article according to any one of claims 1 to 4, wherein an intermediate sheet element is interposed between the front sheet element and the back sheet element. The absorbent article according to claim 5, wherein the intermediate sheet element is a sheet containing a superabsorbent polymer. The absorbent article according to any one of claims 1 to 6, wherein the adhesive portion adheres the first sheet element and the second sheet element by heat sealing or ultrasonic welding. The absorbent article according to any one of claims 1 to 6, wherein the adhesive portion adheres the first sheet element and the second sheet element with a hot melt adhesive. A front body covering the abdomen of the wearer and a back body covering the back of the wearer;
The back sheet, the top sheet, and the absorber constitute an absorbent main body located in a crotch portion between the front body and the back body,
The top sheet includes a first flute portion constituted by the concave portion and the convex portion,
At least one of the front body and the back body includes a waist gather,
The waist gather includes an elastic member extending in the waist circumference direction, and in cooperation with the elastic member, a recess and a protrusion extend along a vertical direction intersecting the waist circumference direction, and Forming the second flute portion in which the concave portions and the convex portions are alternately arranged one by one along the trunk periphery direction;
The absorbent article according to claim 1, wherein the first flute portion and the second flute portion are in communication. The waist gather includes a first waistline sheet element located on the skin side of the wearer, and a second waistline sheet located on the opposite side of the wearer's skin side with respect to the first waistline sheet element. An element and a third waistline seat element located on the opposite side of the wearer's skin side with respect to the second waistline seat element;
Between the second waistline sheet element and the third waistline sheet element, the stretched elastic member is fixed along the waistline direction,
The first waistline sheet element and the second waistline sheet element are bonded via adhesive portions extending in the vertical direction and spaced apart from each other in the waistline direction,
The absorbent article according to claim 9, wherein the second flute portion is configured by contraction of the elastic member. The waist gather includes a first waistline sheet element located on the skin side of the wearer, and a second waistline sheet located on the opposite side of the wearer's skin side with respect to the first waistline sheet element. An element and a third waistline seat element located on the opposite side of the wearer's skin side with respect to the second waistline seat element;
The first waistline sheet element is a sheet element previously provided with uneven portions that extend in the vertical direction and are arranged in the waistline direction, and an elastic member that extends in the waistline direction is extended. The sheet is provided with an uneven portion in advance,
Between the second waistline sheet element and the third waistline sheet element, the stretched elastic member is fixed along the waistline direction,
The absorbent article according to claim 9, wherein the second flute portion is configured by contraction of the elastic member. The absorbent article according to any one of claims 9 to 11, wherein a width of the gap of the second flute portion is wider than a width of the gap of the first flute portion.

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