CN111526845A

CN111526845A - Pants-type absorbent article

Info

Publication number: CN111526845A
Application number: CN201880084016.1A
Authority: CN
Inventors: 槙秀晃; 井上拓也; 大窪哲郎; 清水纪子
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2017-12-28
Filing date: 2018-12-11
Publication date: 2020-08-11
Anticipated expiration: 2038-12-11
Also published as: JP6703975B2; CN111526845B; RU2020121411A; JP2019118581A; RU2020121411A3; WO2019131111A1

Abstract

The pants-type absorbent article includes an absorbent core (11A), a first waist section (20), and a second waist section (30). The first waist body section (20) has non-stretchable sheets (21, 22), a stretchable sheet (24) stretchable in the left-right direction, and a fixing section (41) for fixing the stretchable sheet (24) to the non-stretchable sheets (21, 22). One end of the stretchable sheet (24) in the left-right direction is located above the other end, and the fixing section (41) is provided so as to straddle the one end of the stretchable sheet (24) in the up-down direction.

Description

Pants-type absorbent article

Technical Field

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

Background

Pants-type disposable diapers are known as examples of pants-type absorbent articles. Patent document 1 discloses a pants-type disposable diaper in which an absorbent body is disposed across between a front body outer cover and a back body outer cover, and both widthwise side edges of the front body outer cover and the back body outer cover are joined to each other to form a waist opening. In the front-body exterior assembly and the back-body exterior assembly, the waist elastic member is fixed in an extended state between the inner sheet and the outer sheet (non-stretchable sheet).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2013 and 138795.

Disclosure of Invention

Problems to be solved by the invention

In patent document 1, a linear elastic member is given as an example of the waist elastic member, but by using an elastic sheet instead, the front-body exterior body and the back-body exterior body (waist portion) can be brought into close contact with the wearer. Therefore, this can suppress the elastic member from leaving marks on the skin of the wearer.

However, after the stretchable sheet is fixed to the non-stretchable sheet in an extended state, if the end portion of the stretchable sheet is not fixed to the non-stretchable sheet, a phenomenon occurs in which the end portion of the stretchable sheet curls. For example, even if the stretchable sheet is conveyed while being stretched due to tension applied between two conveying rollers in a production line, it is considered that the above-described curling occurs due to local contraction of the stretchable sheet, which is caused by a slight difference in tension applied at a position after passing between the conveying rollers. It is considered that curling of the stretchable sheet is likely to occur even when the stretchable sheet is temporarily stretched in the width direction intersecting the stretching direction of the stretchable sheet.

In particular, if the waist opening side (waist circumference opening side) end portion of the stretchable sheet is curled and folded, the stretching force is increased in the folded portion of the stretchable sheet accordingly. As a result, the stretching force in the waistline region becomes higher than the design force, and the waistline opening is more difficult to open when the absorbent article is worn.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a pants-type absorbent article which suppresses accidental curling of the waist-opening-side end portion of the stretchable sheet provided in the waist portion.

Means for solving the problems

A main aspect of the present invention for achieving the above object is a pants-type absorbent article having a vertical direction and a horizontal direction, the pants-type absorbent article including: an absorbent core; a first waist portion; and a second waist portion, first waist portion includes elasticity piece, non-elasticity piece and fixed part, the elasticity piece can be in control the direction is flexible, non-elasticity piece range upon range of in the elasticity piece, the fixed part will the elasticity piece is fixed to the non-elasticity piece, the elasticity piece has along control first end and the second end that the direction extends, the elasticity piece first end is located than the position that the second end is high, the fixed part sets up to stride in the upper and lower direction the elasticity piece first end extends.

Other features of the present invention will become apparent from the description of the specification and the drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a pants-type absorbent article can be provided in which accidental curling of the waist opening-side end of a stretchable sheet provided in a waist portion is suppressed.

Drawings

Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter, referred to as "diaper").

Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state.

Fig. 3 is a sectional view taken along line I-I of fig. 2.

Fig. 4 is a sectional view of the abdominal-side waistline portion 20 in production.

Fig. 5 is a sectional view of the abdominal-side waistline portion 20 in the product state.

Fig. 6 is a plan view of the abdomen-side waistline portion 20 shown in fig. 4.

Fig. 7 is a sectional view of a modification of the abdominal-side waistline portion 20.

Fig. 8 is a sectional view of a modification of the abdominal-side waistline portion 20.

Fig. 9 is a sectional view of a modification of the abdominal-side waistline portion 20.

Fig. 10 is a sectional view of a modification of the abdominal-side waistline portion 20.

Fig. 11 is an explanatory view of the crotch-side end of the stretchable sheet 24.

Fig. 12 is an explanatory view of the crotch-side end of the stretchable sheet 24.

Fig. 13 is an explanatory view of the crotch-side end of the stretchable sheet 24.

Fig. 14 is an explanatory view of the crotch-side end of the stretchable sheet 24.

Fig. 15 is an explanatory view of the crotch-side end of the stretchable sheet 24.

Detailed Description

At least the following matters will become clear from the description of the present specification and the accompanying drawings.

A pants-type absorbent article having a vertical direction and a horizontal direction, the pant-type absorbent article comprising: an absorbent core; a first waist portion; and a second waist portion, first waist portion includes elasticity piece, non-elasticity piece and fixed part, the elasticity piece can be in control the direction is flexible, non-elasticity piece range upon range of in the elasticity piece, the fixed part will the elasticity piece is fixed to the non-elasticity piece, the elasticity piece has along control first end and the second end that the direction extends, the elasticity piece first end is located than the position that the second end is high, the fixed part sets up to stride in the upper and lower direction the elasticity piece first end extends.

According to this pants-type absorbent article, the range of the stretchable sheet extending to the first end thereof is fixed to the non-stretchable sheet by the fixing portion. Therefore, the curl of the first end portion of the stretchable sheet, that is, the accidental curl of the waist opening side end portion of the stretchable sheet, which occurs when the fixing portion is not provided in the first end portion can be suppressed. Also, curling and folding of the first end portion of the stretchable sheet due to absence of the fixing portion in the first end portion is prevented. This makes it possible to prevent the stretchable force in the waist opening side end portion of the stretchable sheet from increasing. Therefore, the ease of opening the waistline opening can be maintained.

In such a pants-type absorbent article, the stretchable sheet is provided at the upper end portion of the first waist portion.

According to the pants-type absorbent article, the expansion/contraction force in the upper end portion of the first waist portion can be prevented from increasing, and the ease of opening the waist opening can be maintained.

In such a pants-type absorbent article, the non-stretchable sheet has a first end and a second end extending in the left-right direction, the first end of the non-stretchable sheet is positioned higher than the second end of the non-stretchable sheet, the first end side portion of the non-stretchable sheet is folded downward, and a length in the vertical direction from an upper end of the first waist portion to the first end of the stretchable sheet is shorter than a length in the vertical direction from the upper end of the first waist portion to the first end of the non-stretchable sheet.

According to this pants-type absorbent article, for example, when the first end portion of the stretchable sheet is not folded downward, the stretchable sheet is not positioned too low. Therefore, the fit of the upper end portion of the abdomen-side waist portion can be maintained. Further, for example, in the case where the first end side portion of the stretchable sheet is folded, the length of the folded portion of the stretchable sheet is not too long. Therefore, this appropriately suppresses the stretching force in the waist-opening-side end portion of the first waist portion.

In such a pants-type absorbent article, the fixed portion includes: a first region securing one of two surfaces of the stretchable sheet to the non-stretchable sheet; and a second region which is a region other than the first region and at least a part of which is not exposed.

According to the pants-type absorbent article, the first waist portion can be prevented from being deteriorated in comfort and texture.

In such a pants-type absorbent article, the entire second region is not exposed.

In such a pants-type absorbent article, the non-stretchable sheet has a first end and a second end extending in the left-right direction, the first end of the non-stretchable sheet is located higher than the second end of the non-stretchable sheet, the first end side portion of the non-stretchable sheet is folded downward, and the second region of the fixed portion is covered with the folded portion of the non-stretchable sheet.

According to the pants-type absorbent article, the second region of the fixing portion can be prevented from being exposed.

In such a pants-type absorbent article, the first end portion of the stretchable sheet is not folded downward.

According to this pants-type absorbent article, the stretching force of the first waist portion is appropriately suppressed.

In such a pants-type absorbent article, the fastening portion has a first end and a second end extending in the left-right direction, the first end of the fastening portion is located higher than the second end of the fastening portion, and the first end side portion of the fastening portion is not folded downward.

According to the pants-type absorbent article, the first waistline portion can be made softer and irritation to the wearer's skin can be suppressed.

In such a pants-type absorbent article, the first end of the stretchable sheet and the first end of the fixed portion are positioned at a position lower than the upper end of the first waist portion.

In such a pants-type absorbent article, the fastening portion has a first end and a second end extending in the left-right direction, the first end of the fastening portion is located at a higher position than the second end of the fastening portion, and the first end side portion of the fastening portion is folded downward.

According to the pants-type absorbent article, the fixed portion is folded down, and rigidity is increased in the portion having two layers of the first waist portion. Therefore, when the pant-type absorbent article is pulled up, the first waistline portion can be easily grasped.

In such a pants-type absorbent article, the first end-side portion of the stretchable sheet is folded downward, and the opposing faces of the folded first end-side portion of the stretchable sheet and the unfolded portion of the stretchable sheet are not fixed to each other.

According to the pants-type absorbent article, the fixing portion is provided so as to extend in the up-down direction across the first end of the stretchable sheet which is folded downward. Therefore, the first end of the stretchable sheet can be prevented from being accidentally curled at the portion of the stretchable sheet folded downward. In addition, a space is formed between the folded portion and the unfolded portion of the stretchable sheet. This improves the cushioning ability of the first waist portion, and enables the surface texture to the wearer to be improved.

In such a pants-type absorbent article, the second end side portion of the stretchable sheet is folded upward at the lower end of the fixed portion.

According to this pants-type absorbent article, the range of the stretchable sheet extending to the first end thereof is fixed to the non-stretchable sheet by the fixing portion. Therefore, the curl of the first end portion of the stretchable sheet, that is, the accidental curl of the waist opening side end portion of the stretchable sheet, which occurs when the fixing portion is not provided in the first end portion can be suppressed. On the other hand, the second end side portion of the stretchable sheet is not fixed to the non-stretchable sheet by the fixing portion, and therefore is folded upward at the lower end of the fixing portion, thereby increasing the stretching force in the crotch end portion of the stretchable sheet. Therefore, positional deviation of the absorbent core can be suppressed. Therefore, this makes it possible to maintain the fit of the absorbent core to the wearer even after excretion, and to reduce leakage of excrement.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings

An embodiment of a pants-type absorbent article according to the present invention will be described below taking a disposable diaper for infants as an example. Note that the pants-type absorbent article according to the present invention is not limited to disposable diapers for infants, and may be applied to disposable diapers for adults and sanitary pants, for example. Further, it is applicable not only to pants-type disposable diapers but also to, for example, open-type disposable diapers.

Disposable diaper 1 of the pants type

Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter, referred to as "diaper"). Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state. Fig. 3 is a sectional view taken along line I-I in fig. 2.

In the state of the pants shape shown in fig. 1, the diaper 1 has up-down and left-right directions, and includes a waist opening BH and a pair of leg openings LH. The hip opening BH side is an upper side and the crotch side is a lower side with respect to the up-down direction. As shown in fig. 3, the thickness direction refers to a direction in which the constituent members of the diaper 1 are stacked on each other, the skin side refers to a side that contacts the wearer in the thickness direction, and the non-skin side refers to a side that does not contact the wearer in the thickness direction.

The diaper 1 further includes an absorbent main body 10, a ventral waistline portion 20, and a dorsal waistline portion 30, which are three members that are rectangular in plan view. The abdomen-side waistline portion 20 is in contact with the abdomen-side region of the wearer, and the back-side waistline portion 30 is in contact with the back-side region of the wearer.

When the diaper 1 is in the developed state shown in fig. 2, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are disposed so that the longitudinal direction thereof coincides with the left-right direction of the diaper 1. One end in the longitudinal direction of the absorbent main body 10 is disposed in the center portion with respect to the left-right direction of the abdomen-side waistline portion 20, and the other end in the longitudinal direction of the absorbent main body 10 is disposed in the center portion with respect to the left-right direction of the back-side waistline portion 30.

When the diaper 1 is in the unfolded state shown in fig. 2, the absorbent main body 10 is folded once at substantially the center in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 coincides with the up-down direction of the diaper 1. Both side end portions of the abdomen-side waistline portion 20 in the left-right direction of the diaper 1 are joined to both side end portions of the back-side waistline portion 30 by using heat fusion, ultrasonic fusion, or the like to form a pair of joined regions 2, thereby obtaining the diaper 1 in a state of an underwear shape shown in fig. 1.

As shown in fig. 3, the absorbent body 10 includes an absorbent body 11, a liquid-permeable front sheet 12 disposed on the skin side of the absorbent body 11, a liquid-impermeable back sheet 13 disposed on the non-skin side of the absorbent body 11, and an exterior sheet 14 disposed on the non-skin side of the back sheet 13.

The absorbent body 11 includes an absorbent core 11A that absorbs and holds discharged liquid such as urine, and a liquid-permeable core-wrapping sheet 11B that covers the absorbent core 11A. For example, the absorbent core 11A is composed of liquid absorbent fibers (such as pulp containing Super Absorbent Polymer (SAP)) molded into a predetermined shape.

Further, as shown in fig. 2, leg elastic members 15 are provided on both side portions in the left-right direction of the absorbent main body 10, thereby allowing the diaper 1 to fit the legs of the wearer. For example, the leg elastic members 15 are fixed between two layers of the exterior sheets 14 folded inward in the left-right direction in a state of being stretched in the longitudinal direction of the absorbent main body 10. The leg elastic member 15 is a linear elastic member, an elastic sheet, or the like.

As shown in fig. 3, the abdominal-side waistline portion 20 and the back-side waistline portion 30 respectively include inner layer sheets 21 and 31, outer layer sheets 22 and 32 respectively laminated on the inner layer sheets 21 and 31, and a plurality of linear

elastic members

23 and 33.

The outer sheets 22 and 32 are disposed on the non-skin side of the inner sheets 21 and 31. The inner sheets 21 and 31 and the outer sheets 22 and 32 are disposed on the non-skin side of the absorbent main body 10. It should be noted that the

upper end portions

221 and 321 of the outer sheets 22 and 32 are folded down in such a manner as to cover the lengthwise ends of the absorbent main body 10 from the skin side.

The inner sheets 21 and 31 and the outer sheets 22 and 32 are each a non-stretchable sheet having substantially no stretchability in the left-right direction of the diaper 1. The inner sheets 21 and 31 and the outer sheets 22 and 32 may be composed of an SMS nonwoven sheet (spunbond/meltblown/spunbond nonwoven sheet), a spunbond nonwoven sheet, an air-permeable nonwoven sheet, a plastic sheet, a porous plastic sheet, or a laminate sheet including any of the above layers.

The linear

elastic members

23 and 33 are arranged side by side in the up-down direction between the inner layer sheets 21 and 31 and the outer layer sheets 22 and 32, respectively, and are fixed in a state of being elongated in the left-right direction. Therefore, the abdominal-side waistline portion 20 and the back-side waistline portion 30 can be stretched in the right-left direction so as to fit the waistline of the wearer. The linear

elastic members

23 and 33 may be constituted by linear elastic members made of rubber, spandex, or the like.

In the back-side waistline portion 30, the linear elastic member 33 is disposed in a range from the upper end portion to the lower end portion. However, the upper end portion of the abdomen-side waistline portion 20 is not provided with the linear elastic member 23, but is provided with a stretchable sheet 24 having stretchability in the left-right direction. Note that, in the present embodiment, although the lower end portion of the stretchable sheet 24 overlaps the linear elastic member 23 in the vertical direction, the overlapping is not essential.

According to the structure in which the upper end portion of the abdomen-side waistline portion 20 is provided with the stretchable sheet 24 without providing the linear elastic member 23, the upper end portion of the abdomen-side waistline portion 20 is in close contact with the wearer's ground. Therefore, this suppresses local strangulation, and can suppress the formation of marks by the elastic member. In particular, the infant has an abdominal region that swells, and therefore it is advantageous to suppress the contraction of the abdomen-side waist portion 20.

Further, the stretching force in the upper end portions of the

waistline portions

20 and 30 greatly affects the ability of the waistline opening BH to be easily opened when the diaper 1 is put on. The stretchable sheet 24 has a property of being easily stretched from a natural state but being hardly contracted from the stretched state. Therefore, by providing the stretchable sheet 24 at the upper end portion of the abdominal-side waistline portion 20, it is possible to more easily open the waistline opening BH when putting on the diaper 1, and also to prevent strangulation of the abdominal-side region after the

waistline portions

20 and 30 have fitted to the wearer.

The stretchable sheet 24 may be made by any of various known manufacturing methodsThe stretchable fibrous nonwoven fabric sheet is made of, for example, 10g/m in mass²To 40g/m²Or more preferably 15g/m²To 30g/m²A spunbonded nonwoven fabric sheet, an air-permeable nonwoven fabric sheet, a needle-punched nonwoven fabric sheet, etc. comprising the elastic fibers. The raw material constituting the elastic fiber is a thermoplastic elastomer, rubber, or the like. In particular, when the raw material is a thermoplastic elastomer, melt spinning can be performed using an extruder as in the case of a general thermoplastic resin. The fibers thus obtained can be easily heat-welded, which is advantageous for a stretchable fiber nonwoven sheet. Examples of the thermoplastic elastomer include styrene elastomers, olefin elastomers, polyester elastomers, and polyurethane elastomers. Any of the above may be used alone, or two or more of them may be used in combination. The stretch sheet only needs to exhibit elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretch ratio of the stretchable sheet 24 in the left-right direction is preferably about 1.2 times to 3.0 times.

The waist opening BH side end portion of the stretchable sheet 24 is defined as an end portion

Fig. 4 is a sectional view of the abdominal-side waistline portion 20 in production. Fig. 5 is a sectional view of the abdominal-side waistline portion 20 in the product state. Fig. 6 is a plan view of the abdomen-side waistline portion 20 shown in fig. 4. Note that the configuration of the abdomen-side waistline portion 20 is schematically shown in fig. 4 and 5, and the abdomen-side waistline portion 20 is depicted thicker than it is actually. This also applies to the cross-sectional views described later. In addition, the linear elastic member 23 is not shown in fig. 6.

As described above, the abdominal-side waistline portion 20 includes the inner layer sheet 21, the outer layer sheet 22, and the stretchable sheet 24. In the state in process (fig. 4), the outer sheet 22, the inner sheet 21, and the stretchable sheet 24 are laminated in this order from the non-skin side in the thickness direction.

As shown in fig. 6, the inner layer sheet 21, the outer layer sheet 22, and the stretchable sheet 24 have first ends 21a, 22a, and 24a and second ends 21b, 22b, and 24b extending in the left-right direction, respectively. In the product state (fig. 5), the first ends 21a, 22a and 24a of the sheets are located at a higher level than the second ends 21b, 22b and 24 b.

The inner layer sheet 21 and the outer layer sheet 22 are joined together with an adhesive (not shown) applied therebetween. The inner layer sheet 21 and the outer layer sheet 22 correspond to the non-stretchable sheet of the present invention. Hereinafter, the inner layer sheet 21 and the outer layer sheet 22 are also collectively referred to as a non-stretchable sheet.

In the state in process of production (fig. 4), the position of the first end 21a of the inner layer sheet 21 and the position of the first end 24a of the stretchable sheet 24 are aligned with each other in the up-down direction. The outer sheet 22 extends to a position higher than the inner sheet 21 and the stretchable sheet 24.

In the product state (fig. 5), the outer sheet 22 has been folded downward at a folding position F corresponding to the positions of the first end 21a of the inner sheet 21 and the first end 24a of the stretchable sheet 24. The folded portion 221 of the outer sheet 22 covers the longitudinal end of the absorbent main body 10 on the skin side. Further, the folded portion 221 of the outer sheet 22 is fixed to the stretchable sheet 24 and the absorbent main body 10 using the adhesive 42.

Further, an adhesive 41 such as a hot melt adhesive is applied between the non-stretchable sheet (inner layer sheet 21 and outer layer sheet 22) and the stretchable sheet 24. The stretchable sheet 24 is fixed to the

non-stretchable sheets

21 and 22 by the adhesive 41. As shown in fig. 6, the coated area coated with the adhesive 41 is a rectangular area in a plan view. The coated area coated with the adhesive 41 corresponds to the fixing portion of the present invention. Hereinafter, the application region to which the adhesive 41 is applied is also referred to as a fixing portion 41.

Note that the adhesive 41 may be applied only in a part of the application area where the adhesive 41 is applied, or the adhesive 41 may be applied to the entire application area. The coating pattern of the adhesive 41 may be a known pattern such as a stripe pattern, a spiral pattern, or an Ω pattern. In addition, the planar shape of the application region to which the adhesive 41 is applied is not limited to a rectangle. Further, the fixing portion may be a welded region where the stretchable sheet 24 is fixed to the

non-stretchable sheets

21 and 22 by thermal welding, ultrasonic welding, or the like, and the fixing method is not limited to the adhesive 41.

As shown in fig. 6, the fixing portion 41 has a first end 41a and a second end 41b extending in the left-right direction. In the product state (fig. 5), the first end 41a of the fixing portion 41 is located at a higher position than the second end 41 b. The fixing portion 41 extends in the vertical direction across the first end 24a of the stretchable sheet 24.

Specifically, in the state in process of production (fig. 4), the fixing portion 41 is located between the stretchable sheet 24 and the inner sheet 21, and extends beyond the first end 24a of the stretchable sheet 24 to a position on the skin-side surface of the outer sheet 22. Therefore, in the product state (fig. 5), a part of the fixing portion 41 is folded down along with the folding of the outer sheet 22, and the fixing portion 41 covers the first end 24a of the stretchable sheet 24 from above. Therefore, in the product state (fig. 5), the fixing portion 41 extends across the first end 24a of the stretchable sheet 24 in the up-down direction.

Since the fixing portion 41 is provided in this manner, the portion of the stretchable sheet 24 on the first end 24a side and extending to the first end 24a is fixed to the

non-stretchable sheets

21 and 22. Therefore, it is possible to suppress a situation in which the first end 24a side portion (i.e., the end portion on the waistline opening BH side) of the stretchable sheet 24 is accidentally curled and folded downward due to the contractive force of the stretchable sheet 24 during production.

The curling of the stretchable sheet 24 means that the end of the stretchable sheet 24 stands up in the thickness direction at a folding line extending in the left-right direction of the diaper 1 or the end of the stretchable sheet 24 is folded in the up-down direction. If the end portions of the stretchable sheet 24 are folded into two layers of the stretchable sheet 24, the lateral stretching force increases in the folded portion of the stretchable sheet 24 accordingly.

Therefore, by suppressing the folding of the first end 24a side portion of the stretchable sheet 24 as described above, the stretching force in the left-right direction of the abdomen-side waist portion 20 can be prevented from exceeding the designed force. This therefore makes it possible to maintain the ability to easily open the waistline opening BH when putting on the diaper 1, and to prevent contraction of the abdominal region of the wearer.

Moreover, the ease of opening of the waistline opening BH is greatly influenced by the stretching force of the upper end portions of the

waistline portions

20 and 30. Therefore, when the stretchable sheet 24 is provided in the upper end portion of the abdomen-side waistline portion 20 as in the diaper 1 of the present embodiment, the folding of the first end 24 a-side portion of the stretchable sheet 24 is particularly effectively suppressed. Thus, this makes it possible to maintain the ability to easily open the waistline opening BH.

Note that the stretchable sheet 24 provided in the upper end portion of the abdominal-side waistline portion 20 refers to a case where at least a part of the stretchable sheet 24 is located at a position higher than the center CL (see fig. 5) in the vertical direction of the abdominal-side waistline portion 20. More preferably, the entire stretchable sheet 24 is located at a position higher than the center CL in the vertical direction of the abdomen-side waistline portion 20.

In the product state (fig. 5), the first end 22a side portion of the outer sheet 22 has been folded downward. The length L1 is the length in the vertical direction from the upper end 20a of the abdomen-side waistline portion 20 to one end of the downward folded portion of the non-stretchable sheet (here, the first end 22a of the outer sheet 22). The vertical length from the upper end 20a of the abdominal-side waistline portion 20 to the first end 24a of the stretchable sheet 24 is zero. It is sufficient that the length (zero) is shorter than the above-mentioned length L1.

In other words, it is sufficient that the first end 24a of the stretchable sheet 24 is located higher than the first end 22a of the folded portion of the outer sheet 22. According to this configuration, the position of the stretchable sheet 24 is not excessively low. Therefore, the fit of the upper end portion of the abdomen-side waist portion 20 can be maintained.

Further, the fixing portion 41 has a first region 411 and a second region 412 other than the first region 411 that fix one surface 24A (non-skin-side surface in fig. 4) of the stretchable sheet 24 to the

non-stretchable sheets

21 and 22. The second region 412 of the fastening portion 41 is a region of the fastening portion 41 that is continuous with the first region 411, and is provided in the non-stretchable sheet (the outer sheet 22 in this case) so as to extend beyond the first end 24a of the stretchable sheet 24.

In the in-process state (fig. 4), the first region 411 of the fixing portion 41 is located between the stretchable sheet 24 and the inner sheet 21 and is not exposed. On the other hand, the second region 412 of the fixing portion 41 provided on the outer sheet 22 is exposed on the skin side. If the second region 412 of the fixing portion 41 is exposed on the skin side in the product state, the hardened adhesive 41 will come into contact with the wearer, and the comfort of the abdomen-side waist portion 20 will be reduced. Further, although not shown, even in the case where the second region 412 of the fixing portion 41 is exposed on the non-skin side, the texture of the abdominal-side waistline portion 20 is reduced when touched from the outside.

Therefore, at least a part of the second region 412 of the fixing portion 41 is preferably not exposed. More preferably, the entire second region 412 of the fixing portion 41 is not exposed. In other words, it is preferable that the second region 412 of the fixed portion 41 is located between the constituent materials of the diaper 1.

In the present embodiment, the second region 412 of the fixing portion 41 is covered by the downward folded portion 221 of the outer sheet 22 on the skin side. In other words, the second region 412 of the fixing portion 41 is located between the folded-down portion 221 of the outer sheet 22 and the stretchable sheet 24, and is not exposed. Therefore, the comfort and the texture of the abdomen-side waist portion 20 can be suppressed from being lowered.

Note that the configuration of the abdominal-side waistline portion 20 is not limited to the configuration shown in fig. 5. Other examples include a configuration in which the inner layer sheet 21 is also folded down together with the outer layer sheet 22, a configuration in which only the inner layer sheet 21 is folded down, and a configuration in which neither the inner layer sheet 21 nor the outer layer sheet 22 is folded down. Therefore, the material covering the skin side of the second region 412 of the fixing portion 41 is not limited to the outer sheet 22. Other examples include a folded-down portion of the inner layer sheet 21 and other sheets other than the

outer layer sheets

21 and 22.

Also, in the product state (fig. 5), the first end 24a side portion of the stretchable sheet 24 is not folded downward. In other words, the method of manufacturing the diaper 1 does not include the step of folding the first end 24a side portion of the stretchable sheet 24 in the vertical direction. In addition, the curl of the stretchable sheet 24 is suppressed by the fixing portion 41 extending across the first end 24a of the stretchable sheet 24.

Therefore, a single layer of the stretchable sheet 24 is present in the upper end portion of the abdominal-side waistline portion 20. In other words, the lateral stretching force is appropriately suppressed at the upper end portion of the abdomen-side waistline portion 20. Therefore, when the diaper 1 is put on, the waistline opening BH can be easily opened, and contraction of the abdominal region of the wearer can be suppressed.

Also, in the product state (fig. 5), the first end 41a side portion of the fixing portion 41 has been folded downward. In other words, the manufacturing method of the diaper 1 includes a step of folding down the fixing portion 41 together with the outer sheet 22.

Therefore, the fixing portion 41 is stacked on the upper end portion of the abdomen-side waistline portion 20 in the thickness direction. More specifically, there are two layers of the adhesive 41, and the rigidity in the upper end portion of the abdomen-side waist portion 20 is high. Therefore, when putting on the diaper 1, the upper end portion of the abdomen-side waist portion 20 can be grasped more easily, so that the diaper 1 can be pulled up more easily. It is also possible to suppress the upper end portion of the abdomen-side waist portion 20 from curling and wrinkling during packaging or the like, thereby suppressing the appearance of the diaper 1 from deteriorating.

A method for producing a composite material

Fig. 7 to 10 are sectional views of modified examples of the abdominal-side waistline portion 20. Fig. 9 (a) and 10 (a) are views of the abdomen-side waistline portion 20 in an in-process state. Other figures show the ventral waistline portion 20 in the product state.

In the abdomen-side waistline portion 20 in fig. 7 (a), 7 (B), and 8, the first end 24a side portion of the stretchable sheet 24 is not folded downward, as in fig. 5. It should be noted that the first end 24a of the stretchable sheet 24 is located at a position lower than the upper end 20a of the abdomen-side waistline portion 20. Further, the curl of the portion of the stretchable sheet 24 on the first end 24a side is suppressed by the fixing portion 41 extending across the first end 24a of the stretchable sheet 24 in the up-down direction.

In the abdomen-side waistline portion 20 in fig. 7 (a), 7 (B), and 8, the length L2 is the length in the vertical direction from the upper end 20a of the abdomen-side waistline portion 20 to the first end 24a of the stretchable sheet 24, the length L1 is the length in the vertical direction from the upper end 20a of the abdomen-side waistline portion 20 to the first end 22a of the outer sheet 22, and the length L2 is shorter than the length L1 (L2 < L1). In other words, the position of the stretchable sheet 24 is not too low. Therefore, the fit of the upper end portion of the abdomen-side waist portion 20 can be maintained.

In the abdomen-side waistline portion 20 in fig. 7 (B), the first end 41a side portion of the fixing portion 41 is already folded downward, as in fig. 5. Therefore, the upper end portion of the abdomen-side waistline portion 20 has high rigidity.

On the other hand, in the abdomen-side waistline portion 20 in fig. 7 (a) and fig. 8, the first end 41a side portion of the fixing portion 41 is not folded downward. Therefore, in the upper end portion of the abdomen-side waistline portion 20, the one-layer fixing portion 41 is present, and the upper end portion of the abdomen-side waistline portion 20 is soft.

In the abdominal-side waistline portion 20 in fig. 8, the first end 24a of the stretchable sheet 24 and the first end 41a of the fastening portion 41 are positioned lower than the upper end 20a of the abdominal-side waistline portion 20. Therefore, the upper end portion of the abdomen-side waistline portion 20 has a region where the stretchable sheet 24 and the fastening portion 41 are not provided. Therefore, the upper end portion of the abdominal-side waistline portion 20 is more flexible.

If the upper end portion of the abdomen-side waist portion 20 is soft, the upper end (edge) 20a of the abdomen-side waist portion 20 can be prevented from irritating the skin of the wearer. Further, in the natural state of the diaper 1, the upper end portion of the abdomen-side waistline portion 20 may have a wrinkled shape. Thus, the user can be given an impression that the diaper 1 is soft and comfortable.

In the abdominal-side waistline portion 20 in fig. 9 (B), the first end 24a side portion of the stretchable sheet 24 has been folded downward. Therefore, in the in-process state (fig. 9 (a)), the stretchable sheet 24 extends to a position above the inner layer sheet 21, similarly to the outer layer sheet 22. Further, the manufacturing method of the diaper 1 includes a step of folding down the stretchable sheet 24 together with the outer sheet 22. Therefore, the two-layered stretchable sheet 24 is present in the upper end portion of the abdominal-side waistline portion 20. Therefore, the lateral stretchability in the abdominal-side waistline portion 20 in fig. 9 (B) is larger than that in the abdominal-side waistline portion 20 in fig. 5 and the like.

In the abdomen-side waistline portion 20 in fig. 9 (B), the fixing portion 41 extending across the first end 24a of the stretchable sheet 24 suppresses curling of the first end 24 a-side portion of the stretchable sheet 24. Therefore, there are three or more layers of the stretchable sheet 24, and the stretching force of the abdomen-side waist portion 20 can be prevented from exceeding the designed force.

In the abdominal-side waistline portion 20 in fig. 9 (B), no adhesive is provided for fixing the elastic sheets 24 to each other, and the first end 24a side of the elastic sheet 24 as the folded portion and the opposing surface of the elastic sheet 24 as the non-folded portion are not fixed to each other. Therefore, a space 24B is formed between the folded portion and the unfolded portion of the stretchable sheet 24, which increases the cushioning ability in the upper end portion of the abdomen-side waistline portion 20. This enables improvement in the surface texture for the wearer.

In the abdomen-side waistline portion 20, the surface of the portion provided with the stretchable sheet 24 is smoother than the surface of the portion provided with the linear elastic member 23, and fingers are less likely to be caught when the diaper 1 is pulled up. However, in fig. 9 (B), two layers of the stretchable sheet 24 are present, and the upper end portion of the abdominal-side waistline portion 20 has a large thickness due to the space 24B formed between the two layers. The thick portion serves as a grip and the diaper 1 can be pulled up more easily.

In the abdominal-side waistline portion 20 in fig. 9 (B), it is sufficient that the length L2 in the vertical direction from the upper end 20a of the abdominal-side waistline portion 20 to the first end 24a of the stretchable sheet 24 is shorter than the length L1 in the vertical direction from the upper end 20a of the abdominal-side waistline portion 20 to the first end 22a of the outer sheet 22 (L2 < L1). Therefore, the folded portion of the stretchable sheet 24 is not too long, and the size of the region where two layers of the stretchable sheet 24 exist can be reduced. In other words, the stretching force of the abdominal-side waistline portion 20 in the right-left direction is appropriately suppressed.

Further, as shown in fig. 10 (B), in the abdomen-side waistline portion 20, the stretchable sheet 24 can be fixed to the portion 221 of the outer sheet 22 which has been folded down by the fixing portion 41. Note that it is sufficient to fix the folded portion of the stretchable sheet 24 and the inner layer sheet 21 by the adhesive 43.

In this case, in the state in process of production (fig. 10 (a)), the lower end 24a of the stretchable sheet 24 is the first end 24a of the stretchable sheet 24, and the fixing portion 41 extends downward beyond the lower end 24a of the stretchable sheet 24. Therefore, in the product state (fig. 10 (B)), the first end 24a side portion (i.e., the end portion on the waistline opening BH side) of the stretchable sheet 24 is suppressed from curling.

The crotch-side end of the stretchable sheet 24

Fig. 11 to 15 are explanatory views of the crotch-side end portion of the stretchable sheet 24, and are sectional views of the abdomen-side waistline portion 20 in a product state.

For example, as shown in fig. 10 (B) described above, the fixing portion 41 for fixing the stretchable sheet 24 to the

non-stretchable sheets

21 and 22 may be provided to extend across the second end 24B of the stretchable sheet 24 in the up-down direction. In this case, the curling of the second end 24b side portion (i.e., the crotch side end portion) of the stretchable sheet 24 is suppressed.

As shown in fig. 5, 6, and the like, the fixing portion 41 may have a structure that does not extend across the second end 24b of the stretchable sheet 24 in the vertical direction. In other words, a configuration is possible in which the fixing portion 41 is not provided at the portion of the stretchable sheet 24 on the second end 24b side. In this case, as shown in fig. 11 to 15, the second end 24b side portion of the stretchable sheet 24 is curled by the contraction force of the stretchable sheet 24.

It is considered that such curling occurs due to local contraction of the stretchable sheet 24 caused by a slight difference in tension applied to the stretchable sheet 24 during conveyance after the stretchable sheet 24 is fixed to the

non-stretchable sheets

21 and 22 in the process of manufacturing the diaper 1. It is also considered that the curing occurs when the stretchable sheet 24 is temporarily stretched in the width direction, which intersects with the direction in which the stretchable sheet 24 is stretched.

In addition, the second end 24b side portion of the stretchable sheet 24 overlaps with the absorbent main body 10 or is located in the vicinity of the absorbent main body 10. Therefore, the second end 24b side portion of the stretchable sheet 24 is not only curled in the thickness direction and raised, but also easily folded upward at the lower end 41b (second end) of the fixing portion 41.

Note that the stretchable sheet 24 may be folded in such a manner that a folding line extending in the left-right direction is formed, or the stretchable sheet 24 may be folded in such a manner that the lower end of the stretchable sheet 24 is bent (i.e., curled) as shown in fig. 11 (a) and the like. In addition, in order to avoid the complicated illustration in the figures before fig. 9, these figures show a state where the second end 24b side portion of the stretchable sheet 24 is unfolded.

The second end 24b side portion of the stretchable sheet 24 is folded to have two layers, thereby increasing the stretching force in the lateral direction of the crotch end portion of the stretchable sheet 24. Specifically, the extension and contraction force is high at or near the portion of the abdominal-side waistline portion 20 that overlaps with the absorbent main body 10. Therefore, this can suppress the positional deviation of the absorbent main body 10 (absorbent core 11A). For example, sagging of the absorbent main body 10 due to absorption of the excretory fluid can be suppressed. Therefore, this enables the fit of the absorbent main body to the wearer to be maintained even after excretion, and reduces leakage of excrement. Further, for example, the wearer does not feel discomfort and can walk more easily.

The elastic force at the crotch end of the elastic sheet 24 has less influence on the ease of opening the waistline opening BH than the elastic force at the waist opening BH end. Therefore, even if the two stretchable sheets 24 are present in the crotch-side end portion, the ease of opening of the waistline opening BH can be maintained.

In addition, the crotch-side end of the stretchable sheet 24 is folded by the contraction force of the stretchable sheet 24. In other words, the method of manufacturing the diaper 1 does not have the step of folding the second end 24b side portion of the stretchable sheet 24 upward. Therefore, it can be said that the stretching force of the crotch-side end portion of the stretchable sheet 24 is increased without increasing the complexity of the manufacturing method of the diaper 1.

The pants-type diaper 1 has a pair of joined regions 2, and both right and left side end portions of the abdomen-side waistline portion 20 are joined to both right and left side end portions of the back-side waistline portion 30 in the pair of joined regions 2 by welding. As shown in fig. 6, it is preferable that the stretchable sheet 24 is provided to extend outward in the left-right direction with respect to the position where the joining region 2 is formed. Further, the joining region 2 is preferably formed in a state where the second end 24b side portion of the stretchable sheet 24 is folded upward. According to this configuration, the folded state of the second end 24b side portion of the stretchable sheet 2 is maintained.

The vertical position of the folded portion (hereinafter also referred to as the folded portion 241) of the stretchable sheet 24 will be described below with reference to fig. 11 to 15. The folding portion 241 is specifically a portion extending from the portion 24c of the stretchable sheet 24 in contact with the second end 41b of the fixed portion 41 to the second end 24b of the stretchable sheet 24.

Note that in the abdomen-side waistline portion 20 shown in fig. 11 (a), fig. 12 (a), fig. 13 (a), fig. 14 (a), and fig. 15 (a), the folded portion 241 of the stretchable sheet 24 is located on the non-skin side of the absorbent main body 10. On the other hand, in the abdomen-side waistline portion 20 shown in fig. 11 (B), fig. 12 (B), fig. 13 (B), fig. 14 (B), and fig. 15 (B), the folded portion 241 of the stretchable sheet 24 is positioned on the skin side of the absorbent main body 10.

In the abdomen-side waistline portion 20 in fig. 11 (a) and 11 (B), the folded portion 241 of the stretchable sheet 24 is located at a position higher than the upper end 10a of the absorbent main body 10. In other words, the folded portion 241 does not overlap the absorbent main body 10 in the up-down direction.

In this case, the folded portion 241 may bring the portion of the abdominal-side waistline portion 20 near the absorbent main body 10 into close contact with the wearer's body. Therefore, this can suppress the positional deviation of the absorbent main body 10 (absorbent core 11A). Also, the expansion and contraction force of the folded portion 241 is less likely to be hindered by the absorbent main body 10 having higher rigidity.

In the abdominal-side waistline portion 20 in fig. 12 (a) and 12 (B), the folded portion 241 of the stretchable sheet 24 is located at a position lower than the upper end 10a of the absorbent main body 10 and also located at a position higher than the upper end 11Aa of the absorbent core 11A. In other words, the folded portion 241 overlaps the upper end portion of the absorbent main body 10 (the front sheet 12, the back sheet 13, the exterior sheet 14, and the core wrapping sheet 11B) in the vertical direction, but does not overlap the absorbent core 11A.

The folded portion 241 in fig. 12 (a) is located on the non-skin side of the absorbent main body 10. Therefore, the folded portion 241 can bring the upper end portion of the absorbent main body 10 into close contact with the wearer from the non-skin side, and can suppress positional deviation of the absorbent main body 10 (absorbent core 11A).

On the other hand, the folded portion 241 in fig. 12 (B) is located on the skin side of the absorbent main body 10. In this case as well, the portion of the abdominal-side waistline portion 20 overlapping the upper end portion of the absorbent main body 10 can be brought into close contact with the wearer by the folded portion 241, and the positional deviation of the absorbent main body 10 (absorbent core 11A) can be suppressed. In fig. 12 (B), the stretchable sheet 24 covers the skin side of the upper end 10a of the absorbent main body 10 together with the outer sheet 22. Therefore, the wearer is less likely to feel the upper end 10a (edge) of the absorbent main body 10, and the wearer can be restrained from feeling something else.

In addition, the region of the absorbent main body 10 where the absorbent core 11A is provided has higher rigidity than the region where the absorbent core 11A is not provided. Therefore, in the case shown in fig. 12 (a) and 12 (B), the stretching force of the folded portion 241 is less likely to be hindered by the absorbent core 11A having high rigidity.

In the abdomen-side waistline portion 20 in fig. 13 (a) and 13 (B), the folded portion 241 of the stretchable sheet 24 extends in the up-down direction across the upper end 10a of the absorbent main body 10. In this case, the number of material layers in the vicinity of the upper end 10a of the absorbent main body 10 can be gradually changed.

Specifically, the number of material layers may increase from the upper side to the lower side, that is, there are a region having one layer of the stretchable sheet 24, a region having two layers of the stretchable sheet 24 (folded portion 241), and a region of the absorbent main body 10 laminated to a portion having two layers of the stretchable sheet 24 (folded portion 241). Therefore, the difference in height and the difference in rigidity between the region having the absorbent main body 10 and the region not having the absorbent main body 10 can be reduced, and the wearer can be inhibited from feeling foreign matter.

In particular, in fig. 13 (B), the folded portion 241 of the stretchable sheet 24 covers the skin side of the upper end 10a of the absorbent main body 10. Therefore, the upper end 10a (edge) of the absorbent main body 10 is less likely to be felt by the wearer even to a greater extent than in the case shown in fig. 12 (B), and the case where the wearer has a feeling of foreign matter can be suppressed.

In the abdominal-side waistline portion 20 in fig. 14 (a) and 14 (B), the folding portion 241 of the stretchable sheet 24 is located at a position lower than the upper end 11Aa of the absorbent core 11A. In other words, the folded portion 241 overlaps the absorbent core 11A in the up-down direction.

The folded portion 241 in fig. 14 (a) is located on the non-skin side of the absorbent core 11A. Therefore, the folded portion 241 can bring the absorbent core 11A into close contact with the wearer from the non-skin side, so that positional displacement of the absorbent main body 10 (absorbent core 11A) can be suppressed. In addition, since the absorbent core 11A becomes heavy when absorbing the excretory fluid, the portion of the absorbent main body 10 where the absorbent core 11A is provided is most likely to be displaced. Therefore, in fig. 14 (a), the portion of the absorbent main body 10 where the positional deviation is most likely to occur may be in close contact with the wearer.

On the other hand, the folded portion 241 in fig. 14 (B) is located on the skin side of the absorbent core 11A. In this case as well, the portion of the abdominal-side waistline portion 20 that overlaps with the portion of the absorbent main body 10 where positional deviation is most likely to occur can also be brought into close contact with the wearer by the folded portion 241, and positional deviation of the absorbent main body 10 (absorbent core 11A) can be suppressed. In fig. 14 (B), the stretchable sheet 24 covers the upper end 10a of the absorbent body 10 and the upper end 11Aa of the absorbent core 11 on the skin side. Therefore, the wearer is less likely to feel the upper end (edge) 10a of the absorbent main body 10 and the upper end (edge) 11Aa of the absorbent core 11, and the wearer can be restrained from feeling a foreign matter.

In the abdominal-side waistline portion 20 in fig. 15 (a) and 15 (B), the folded portion 241 of the stretchable sheet 24 extends in the up-down direction across the upper end 11Aa of the absorbent core 11A. In this case, the number of material layers in the vicinity of the upper end 11Aa of the absorbent core 11A can be gradually changed.

Specifically, the number of material layers may increase from the upper side to the lower side, that is, there are a region where the upper end portion of the absorbent main body 10 and the one-layer stretchable sheet 24 are laminated with each other, a region where the upper end portion of the absorbent main body 10 and the two-layer stretchable sheet 24 (folded portion 241) are laminated with each other, and a region where the absorbent core 11A is provided and the two-layer stretchable sheet 24 are laminated with each other of the absorbent main body 10. Therefore, the difference in height and the difference in rigidity between the region having the absorbent core 11A and the region not having the absorbent core 11A can be reduced, and the wearer can be inhibited from feeling foreign matter.

In particular, in fig. 15 (B), the folded portion 241 of the stretchable sheet 24 covers the skin side of the upper end 11Aa of the absorbent core 11. Therefore, the upper end (edge) 11Aa of the absorbent core 11A is less likely to be felt by the wearer even to a greater extent than in the case shown in fig. 14 (B), and it is possible to suppress the wearer from feeling a foreign substance.

In other embodiments, the invention is not limited to the specific embodiments described

Although the embodiments of the present invention have been described above, the above embodiments of the present invention are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the present invention in any way. Various changes or modifications may be made to the invention without departing from the spirit thereof, and the invention encompasses equivalents thereof.

In the above embodiment, the abdomen-side waistline portion 20 has the stretchable sheet 24, and the abdomen-side waistline portion 20 corresponds to the first waistline portion of the present invention and the back-side waistline portion 20 corresponds to the second waistline portion of the present invention, but the present invention is not limited thereto. For example, the following aspects are possible: the back-side waistline portion 20 has an elastic sheet 24, the back-side waistline portion 30 corresponds to a first waistline portion of the present invention, and the abdomen-side waistline portion 20 corresponds to a second waistline portion of the present invention. Also, the second waistline portion of the present invention may include a stretchable sheet, or both the abdomen-side waistline portion 20 and the back-side waistline portion 30 may have a stretchable sheet. In this case, the fixing portion that fixes the stretchable sheet of the second waist portion (the stretchable sheet of either the abdomen-side waist portion 20 or the back-side waist portion 30) to the non-stretchable sheet may or may not extend across the first end in the up-down direction of the stretchable sheet.

In the above embodiment, the stretchable sheet 24 is disposed at the upper end portion of the abdomen-side waistline portion 20, but the present invention is not limited thereto, and the stretchable sheet 24 may be disposed at any position in the vertical direction of the abdomen-side waistline portion 20.

In addition, the above embodiment gives the following example: the pants-type absorbent article is a so-called three-piece diaper in which the abdomen-side waist portion 20 and the back-side waist portion 30 are separate members, and the diaper thus includes three members, i.e., the abdomen-side waist portion 20, the back-side waist portion 30, and the absorbent main body 10, but is not limited thereto. For example, a pant-type absorbent article may be a so-called two-piece diaper in which the abdomen-side waist portion 20 and the back-side waist portion 30 are formed as a single member in which these two members are connected via a crotch portion, and thus, the diaper includes two members, i.e., an absorbent main body and an exterior member in which the abdomen-side waist portion 20 and the back-side waist portion 30 are integrated.

Description of the reference numerals

1 diaper (pants-type absorbent article), 2 joining region,

10 an absorbent body, 11 an absorbent body,

An 11A absorbent core, an 11B core wrapping sheet,

12 front surface pieces, 13 back surface pieces,

14 outer sheet, 15 leg elastic member,

20a ventral-side waist part (first waist part),

21 inner layer sheet (non-stretchable sheet) and 22 outer layer sheet (non-stretchable sheet),

23 linear elastic members, 24 stretchable sheets,

30 back waist part (second waist part), 31 inner layer sheet,

32 outer layer sheets, 33 a linear elastic member,

41 fixed part (adhesive), 42, 43 adhesive

Claims

1. A pants-type absorbent article having a vertical direction and a horizontal direction,

the pants-type absorbent article includes:

an absorbent core;

a first waist portion; and

a second waist part, a second waist part and a second waist part,

the first waist part comprises a stretchable sheet, a non-stretchable sheet and a fixing part,

the stretchable sheet is stretchable in the left-right direction,

the non-stretchable sheet is laminated on the stretchable sheet,

the fixing portion fixes the stretchable sheet to the non-stretchable sheet,

the stretchable sheet has a first end and a second end extending in the left-right direction,

the first end of the stretchable sheet is located at a higher position than the second end,

the fixing portion is provided to extend across the first end of the stretchable sheet in the up-down direction.

2. A pant-type absorbent article according to claim 1,

the stretchable sheet is provided at the upper end of the first waist portion.

3. A pant-type absorbent article according to claim 1 or 2,

the non-stretchable sheet has a first end and a second end extending in the left-right direction,

the first end of the non-stretchable sheet is located at a higher position than the second end of the non-stretchable sheet,

the first end side portion of the non-stretchable sheet is folded downward, and

the length in the vertical direction from the upper end of the first waist portion to the first end of the stretchable sheet is shorter than the length in the vertical direction from the upper end of the first waist portion to the first end of the non-stretchable sheet.

4. A pant-type absorbent article according to any one of claims 1 to 3,

the fixing portion includes:

a first region securing one of the two surfaces of the stretchable sheet to the non-stretchable sheet, and

a second region which is a region other than the first region, and

at least a portion of the second region is not exposed.

5. A pant-type absorbent article according to claim 4,

the entire second region is not exposed.

6. A pant-type absorbent article according to claim 4 or 5,

the first end of the non-stretchable sheet is located at a higher position than the second end of the non-stretchable sheet, and

the first end side portion of the non-stretchable sheet is folded downward, and

the second region of the fastening portion is covered by the folded portion of the non-stretchable sheet.

7. A pant-type absorbent article according to any one of claims 1 to 6,

the first end side portion of the stretch panel is not folded downward.

8. A pant-type absorbent article according to claim 7,

the fixing portion has a first end and a second end extending in the left-right direction,

the first end of the fixing portion is located at a higher position than the second end of the fixing portion, and

the first end side portion of the fixing portion is not folded downward.

9. A pant-type absorbent article according to claim 8,

the first end of the stretchable sheet and the first end of the fixing portion are located at a position lower than the upper end of the first waist portion.

10. A pant-type absorbent article according to claim 7,

the first end side portion of the fixing portion is folded downward.

11. A pant-type absorbent article according to any one of claims 1 to 6,

the first end side portion of the stretchable sheet is folded downward, and

the folded first end side portion of the stretchable sheet and the opposite face of the unfolded portion of the stretchable sheet are not fixed to each other.

12. A pant-type absorbent article according to any one of claims 1 to 11,

the second end side portion of the stretchable sheet is folded upward at the lower end of the fixing portion.