CN117982294A - Absorbent article - Google Patents

Abstract

An absorbent article (1) is provided, comprising a pair of waistline portions (20, 30) and an absorbent main body (10), wherein: the waist portion (20) includes a pair of sheets (21, 22) and a plurality of elastic members (23); each elastic member (23) is continuously arranged from one end to the other end in the width direction of the waistline portion (20), and has end fixing portions (40) located at both ends in the width direction; the plurality of elastic members (23) include a first elastic member (231 a) and a second elastic member (231 b), the first elastic member (231 a) having an unfixed portion (51) that is not fixed to the pair of sheets (21, 22) on the inner side in the width direction of the end fixing portion (40), the second elastic member (231 b) having a fixed portion (52), a region of the fixed portion (52) that overlaps the unfixed portion (51) in the width direction being fixed to the pair of sheets (21, 22); the length of the non-fixed part (51) is longer than the length of the absorbent main body (10) in the width direction.

Description

Absorbent article

The present application is a divisional application of the application patent application with the application number 202080019865.6 (the application number PCT/JP2020/009120 of the corresponding international application), the application date of 3/4/2020, and the application name of "absorbent article".

Technical Field

The present invention relates to an absorbent article.

Background

As a stretchable structure of the waist portion, there is a structure including an elongated elastic stretchable member provided between two sheets along a stretching direction. For example, patent document 1 discloses the following telescopic structure: the two ends of the elastic telescopic member are fixed to the two sheets; the elastic telescoping member acts as a free portion between these fixed ends, which is not fixed to the two sheets; and a sheet joining portion joining the two sheets with a hot melt adhesive is provided in a region between the fixed end portions. The sheet joining portions that are continuous in the expansion and contraction direction form waves (wrinkles) in such a manner that the two sheet layers are aligned with each other, and the tops of the wrinkles are gently curved, giving a soft feel.

Prior art literature

Patent literature

Patent document 1: japanese patent No. 6254625

Disclosure of Invention

Problems to be solved by the invention

In the waist portion of the absorbent article of patent document 1, the elastic stretchable member is not fixed between two sheets between the fixed ends of both ends of the elastic stretchable member. Therefore, there is a case where the relative position of the elastic stretchable member with respect to the waist portion is shifted (for example, the position in the up-down direction) when the absorbent article is worn, resulting in a risk of deterioration in fit or "folding" of the sheet constituting the waist portion. In contrast, in the case where the entire elastic stretchable member is fixed to the waist portion, the positional displacement of the elastic stretchable member can be suppressed. However, the increased area of the portion of the two sheets fixed by the elastic expansion member causes a risk of impairing the softness of the waist portion.

The present invention has been made in view of the above-described problems, and an object of the present invention is to suppress folding of a waist portion of an absorbent article while enhancing flexibility of the waist portion.

Solution for solving the problem

A main aspect of the present invention for achieving the above object is an absorbent article having a width direction, a longitudinal direction, and a thickness direction in an unfolded state, the absorbent article including a pair of waist portions and an absorbent main body having an absorbent core, at least one of the pair of waist portions having a pair of sheets and a plurality of stretchable members disposed between the pair of sheets and stretched in the width direction, each of the stretchable members being continuously disposed from one end portion to the other end portion in the width direction of the one of the waist portions, each of the stretchable members having a pair of end fixing portions in which both ends in the width direction of the stretchable member are fixed to the pair of sheets, the plurality of stretchable members including at least one first stretchable member having a non-fixing portion to which the non-fixing portion is not fixed in the width direction relative to the end fixing portion and at least one second stretchable member having a fixing portion to which the non-fixing portion is fixed in the width direction overlapping with the non-fixing portion in the width direction than the length of the absorbent main body in the width direction.

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

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the flexibility of the waist portion of the absorbent article can be enhanced, and the occurrence of folding of the waist portion can be suppressed.

Drawings

Fig. 1 is a schematic perspective view of a pants-type disposable diaper 1.

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

Fig. 3 is a schematic cross-sectional view taken along line I-I in fig. 2.

Fig. 4 is a schematic plan view of the abdomen-side waist part 20 of the first embodiment.

Fig. 5 is a schematic plan view of the abdomen-side waist part 20 according to the modification.

Fig. 6 is a schematic plan view of the abdomen-side waist part 20 of the second embodiment.

Fig. 7 is a schematic plan view of the abdomen-side waist part 20 of the third embodiment.

Detailed Description

The descriptions of the present specification and drawings will clarify at least the following matters.

An absorbent article having a width direction, a longitudinal direction, and a thickness direction in an expanded state, the absorbent article comprising a pair of waist portions and an absorbent main body having an absorbent core, at least one of the pair of waist portions having a pair of sheets and a plurality of stretchable members disposed between the pair of sheets and stretched in the width direction, each of the stretchable members being continuously disposed from one end portion to the other end portion in the width direction of the one of the waist portions, each of the stretchable members having a pair of end fixing portions in which both end portions in the width direction of the stretchable member are fixed to the pair of sheets, the plurality of stretchable members including at least one first stretchable member having a non-fixing portion which is not fixed to the pair of sheets on an inner side in the width direction with respect to the end fixing portion and at least one second stretchable member having a fixing portion which is fixed to the length in the width direction of the non-fixing portion being longer than the length of the absorbent main body in the width direction.

According to the absorbent article described above, since the first stretchable member has the non-fixed portion, the area of the highly rigid portion of the waist portion is reduced, and the softness can be enhanced. In addition, the up-down movement of the non-fixed portion of the first telescopic member is restricted by the fixed portion, which makes the telescopic member hardly undergo positional displacement, so that occurrence of folding in the waistline portion or deterioration of the fitting property can be suppressed. Further, since the width of the non-fixed portion is made longer than the width of the absorbent main body, the wearer hardly feels the absorbent article hard in the region overlapping the absorbent main body in the waistline portion, particularly in the region corresponding to the central portion of the wearer's body.

In the absorbent article, it is desirable that the first stretchable member has the non-fixed portion in the entire region between the pair of end fixed portions in the width direction.

According to the absorbent article described above, the width-direction length of the non-fixed portion becomes longer as compared with the case where the non-fixed portion is provided in only a part of the region between the end fixed portions on both sides in the width direction, so that the area of the low rigidity portion in the waistline portion can be increased. This can further enhance the softness of the waist portion.

In this absorbent article, it is desirable that the first stretchable member has a central fixing portion at a central portion in the width direction, the central fixing portion being a portion where the first stretchable member is fixed to the pair of sheets, and the first stretchable member has the non-fixing portion at both outer sides in the width direction of the central fixing portion.

According to the absorbent article described above, since the first stretchable member is fixed by the central fixing portion at the widthwise central portion, the upward and downward movement of the first stretchable member is easily suppressed, and the amount of movement (amplitude) in the upward and downward direction is reduced. This suppresses positional displacement of the stretchable member in the up-down direction, so that folding of the waist portion or deterioration of the fitting property can be suppressed more easily.

In the absorbent article, it is desirable that the second stretchable member has the fixing portion in the entire region between the pair of end fixing portions in the width direction.

According to the absorbent article described above, the fixing portion of the second stretchable member is provided widely in the width direction, so that the movement of the first stretchable member is more easily restricted even in the case of attempting to move the first stretchable member in the up-down direction. This makes it possible to suppress occurrence of a large positional shift. Therefore, when wearing the absorbent article, the occurrence of folding in the waistline portion and/or deterioration of the fit can be more easily suppressed.

In the absorbent article, it is desirable that the number of the first stretchable members provided to at least one of the pair of waist portions is larger than the number of the second stretchable members provided to the one of the pair of waist portions.

According to the above absorbent article, the number of non-fixed portions provided in the waistline portion is greater than the number of fixed portions. That is, in the waistline portion, the proportion of the high rigidity region is reduced, so that the flexibility of the waistline portion can be further improved.

In the absorbent article, it is desirable that the number of the second stretchable members provided to at least one of the pair of waist portions is equal to or greater than the number of the first stretchable members provided to the one of the pair of waist portions.

According to the absorbent article described above, since the number of the fixed portions provided in the waist portion is equal to or greater than the number of the non-fixed portions, the proportion of the portion of the waist portion to which the second stretchable member is fixed increases, and therefore the positional displacement of the second stretchable member hardly occurs. Therefore, the number of the fixing portions of the second telescopic member increases so that it is easier to further restrict the up-down movement of the first telescopic member. That is, the positional displacement of the telescopic member can be suppressed as a whole. This can further suppress occurrence of turnover in the waist portion or deterioration of the fitting property.

In the absorbent article, it is desirable that at least one of the first stretchable members is disposed between two of the second stretchable members disposed adjacent to each other in the longitudinal direction.

According to the absorbent article described above, the non-fixed portion of the first stretchable member is arranged to be sandwiched between the fixed portions of the second stretchable member in the up-down direction, and therefore the fixed portions make it easier to restrict the up-down movement of the non-fixed portion, so that the positional displacement of the first stretchable member can be reduced. This can further suppress occurrence of turnover in the waist portion or deterioration of the fitting property.

In the absorbent article, it is desirable that the first stretchable member and the second stretchable member are alternately arranged side by side in the longitudinal direction.

According to the absorbent article described above, since the upward and downward movement of the non-fixed portion of the first stretchable member is restricted by the fixed portion of the second stretchable member, the positional displacement of the first stretchable member can be reduced. This can further suppress occurrence of turnover in the waist portion or deterioration of the fitting property. Further, since the fixed portions and the non-fixed portions are alternately arranged in parallel in the up-down direction, when the waist portion is contracted in the width direction, regular wrinkles are easily formed on the surface of the waist portion.

In this absorbent article, it is desirable that the absorbent article has a portion where the absorbent body and the fixing portion overlap when viewed in the thickness direction.

According to the absorbent article described above, the stretching force of the second stretching member fixed to the skin side sheet makes it easier to suppress the positional displacement of the absorbent core indirectly fixed to the skin side sheet. Therefore, the fit of the absorbent core is improved, excrement hardly leaks, and the wearing comfort of the absorbent article is enhanced.

In this absorbent article, it is desirable that the fixing portion is provided in a region between an upper end of the absorbent body and an upper end of the absorbent core in the longitudinal direction in a region overlapping the absorbent body when viewed in the thickness direction.

According to the absorbent article described above, since the stretching force of the second stretching member hardly acts directly on the region overlapping the absorbent core, the force that contracts or presses the absorbent core toward the skin side of the wearer when the absorbent article is worn hardly acts. This makes it easier to maintain the absorbent properties of the absorbent core. On the other hand, the upper end region (inner panel) of the absorbent main body 10 conforms to the body of the wearer, making it difficult to form a gap between the absorbent main body and the body of the wearer. This makes it easier to suppress leakage of excrement such as urine from the upper end portion of the absorbent main body. This makes it easier to suppress leakage of excrement while enhancing the fit of the absorbent core.

In this absorbent article, it is desirable that a post-treatment belt for holding the absorbent article in a rolled state when the absorbent article is discarded after use is provided on the non-skin side of the waist portion, the post-treatment belt has a belt fixing portion that fixes the post-treatment belt to the non-skin side of the waist portion, and the absorbent article has a portion where the belt fixing portion overlaps with the fixing portion when viewed in the thickness direction.

According to the absorbent article described above, the belt fixing portion of the post-treatment belt and the fixing portion of the second stretchable member overlap. Therefore, when the post-treatment belt is pulled to the non-skin side in the thickness direction after the absorbent article is used, the pulling force is easily transmitted to both the skin side sheet and the non-skin side sheet constituting the waistline portion. This prevents only the non-skin side panels from being pulled or torn and/or inhibits the tensile force from being transmitted to the waistline portion hardly. This may facilitate the post-treatment of the absorbent article after use.

In this absorbent article, it is desirable that the absorbent article further include a sheet joining portion in which facing surfaces of the pair of sheets are joined to each other, and the sheet joining portion and the stretchable member have no overlapping portion.

According to the absorbent article described above, when the waist stretchable member is contracted, wrinkles are easily formed in the waist portion, and the appearance or fit of the waist portion can be enhanced. In addition, since the sheet engaging portion does not overlap the waist telescopic member, the area of the portion of the waist telescopic member fixed to the sheet does not increase. The movement of the waist extension member in the up-down direction can be regulated while maintaining the flexibility of the waist portion. Therefore, the vertical interval of the waist stretchable member is easily maintained, so that the occurrence of folding in the waist portion or deterioration of the fitting property can be easily suppressed.

First embodiment= = = = =

Hereinafter, as an example of the absorbent article according to the present invention, an embodiment will be described using a pants-type disposable diaper for infants. However, the absorbent article according to the present invention is not limited to the above-described absorbent article, and is also applicable to adult pants-type disposable diapers, adult belt-type disposable diapers, sanitary pants, and the like.

< Structure of pants-type disposable diaper 1 >

Fig. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper 1"). Fig. 2 is a schematic plan view of the diaper 1 in a unfolded state and an extended state. Fig. 3 is a schematic cross-sectional view taken along line I-I in fig. 2. The "developed state" of the diaper 1 refers to a state in which the diaper 1 is developed in the longitudinal direction by releasing a later-described locking portion 40 and separating a pair of waistline portions 20 and 30 (later-described). The "extended state" of the diaper 1 refers to a state in which the diaper 1 is extended without wrinkles, and a state in which the diaper 1 is extended to a state in which the size of the constituent members (for example, the waistline portions 20 and 30, etc.) of the diaper 1 matches or approximates the size of the members themselves.

In the pants-type state shown in fig. 1, the diaper 1 has a width direction, a vertical direction, and a front-rear direction, and is formed with a waist opening BH and a pair of leg hole openings LH. In the up-down direction, the waist side is defined as the upper side, and the crotch side is defined as the lower side. In the front-rear direction, the side near the wearer's ventral side is defined as the front side, and the side near the wearer's back side is defined as the rear side. Further, as shown in fig. 3, the direction in which the constituent members of the diaper 1 are stacked on each other will be referred to as the thickness direction. In the thickness direction, the side that comes into contact with the wearer is defined as the skin side, and the side that does not come into contact with the wearer is defined as the non-skin side. Further, in the developed state of fig. 2, the diaper 1 has a longitudinal direction and a width direction intersecting each other. The longitudinal direction is a direction extending in the up-down direction, and the width direction is the same direction as the width direction of the pants-type state of fig. 1.

Further, the diaper 1 includes a pair of waist portions 20 and 30 and an absorbent main body 10. Of the pair of waistline portions 20 and 30, a portion applied to the abdomen side of the wearer is referred to as an abdomen side waistline portion 20, and a portion applied to the back side of the wearer is referred to as a back side waistline portion 30.

In the developed state shown in fig. 2, the diaper 1 has a width direction and a longitudinal direction, and one end portion in the longitudinal direction (the abdomen side) of the absorbent main body 10 is disposed at the width direction center portion of the abdomen side waist portion 20, and the other end portion in the longitudinal direction (the back side) of the absorbent main body 10 is disposed at the width direction center portion of the back side waist portion 30. In the diaper 1 in the developed state, the absorbent main body 10 is folded at substantially the center in the longitudinal direction, and both widthwise side portions of each of the abdomen-side waist portion 20 and the back-side waist portion 30 are locked by a pair of locking portions 40, thereby forming the diaper 1 in the pants-type state shown in fig. 1. It should be noted that the longitudinal direction of the diaper 1 in the developed state is aligned with the up-down direction of the diaper 1 in the pant-type state. The locking method in the locking portion 40 may be exemplified by welding, bonding with an adhesive, or the like.

As shown in fig. 3, the absorbent main body 10 includes: an absorber 11; a liquid-permeable topsheet 12 disposed on the skin side with respect to the absorber 11; a liquid-impermeable back sheet 13 disposed on the non-skin side with respect to the absorber 11; and an outer sheet 14 disposed on the non-skin side with respect to the back sheet 13.

As shown in fig. 2, the absorber 11 includes: an absorbent core 11A that absorbs and retains excretory fluid such as urine; a liquid-permeable core wrap sheet 11B covering the absorbent core 11A. As the absorbent core 11A, a material obtained by shaping liquid absorbent fibers (e.g., pulp) containing a superabsorbent polymer (SAP) into a predetermined shape can be exemplified. It should be noted that the absorbent core 11A may not be covered by the core wrap sheet 11B.

As shown in fig. 3, the abdomen-side waist part 20 (back-side waist part 30) includes: a soft skin side sheet 21 (31) and a non-skin side sheet 22 (32) (a pair of sheets) made of nonwoven fabric or the like; a plurality of waist extension and contraction members 23 (33) extending and contracting in the width direction and arranged between the skin side sheet 21 (31) and the non-skin side sheet 22 (32). The plurality of waist stretchable members 23 (33) are arranged in parallel with an interval in the up-down direction (longitudinal direction) between the skin side sheet 21 (31) and the non-skin side sheet 22 (32), and are fixed in a state of being stretched in the width direction. Therefore, the abdomen-side waist part 20 and the back-side waist part 30 stretch in the width direction and fit around the waist of the wearer. Note that as the waist stretchable members 23 and 33, a linear stretchable member (elastic string or the like) or an elongated stretchable sheet may be exemplified. In addition, the configuration of the waistline portions 20 and 30 is not limited to the configuration shown in the drawings. For example, the following are acceptable: a configuration having a three-layer or more structure in which different sheets are laminated on the pair of sheets; or by folding one sheet to form the pair of sheets.

In addition, in the present embodiment, as an example of the pants-type disposable diaper, a so-called three-sheet diaper having three members (i.e., the abdomen-side waist portion 20, the back-side waist portion 30, and the absorbent main body 10) is provided; the abdomen-side waistline portion 20 and the back-side waistline portion 30 are separated from each other. However, the present invention is not limited thereto. For example, the following diapers may be used: so-called two-piece pant-type disposable diapers having two members (i.e., an outer member and an absorbent main body); the outer member is a member in which the abdomen-side waistline portion 20 and the back-side waistline portion 30 are integrated with each other, and the abdomen-side waistline portion 20 and the back-side waistline portion 30 form a single member continuous via the crotch portion.

< Waist portions 20 and 30>

Fig. 4 is a schematic plan view of the abdomen-side waist part 20 of the first embodiment. Hereinafter, the configuration of the pair of waistline portions 20, 30 will be described using the abdomen-side waistline portion 20 as an example. However, at least one of the pair of waist portions 20 and 30 may have the following configuration. That is, both of the waistbands 20 and 30 may have the following configuration. Or only the back side waistline portion 30 may have the following configuration, and the abdomen side waistline portion 20 may have a different configuration. Or only the abdomen-side waist part 20 may have the following configuration and the back-side waist part 30 may have a different configuration. The same applies to the other embodiments.

The plurality of waist telescopic members 23 provided in the abdomen-side waist portion 20 (hereinafter referred to as "waist portion 20") include: a plurality of "continuous expansion members 231" (expansion members of the present invention) arranged continuously from one end to the other end in the width direction of the waistline portion 20; and a plurality of "discontinuous telescopic members 232" which are discontinuously arranged in the width direction. The discontinuous telescopic member 232 is arranged below the continuous telescopic member 231.

Each of the continuous stretchable members 231 has "a pair of end fixing portions 50", and both widthwise end portions of the end fixing portions 50 are fixed to the skin-side sheet 21 and the non-skin-side sheet 22. Note that the fixing method of the end fixing portion 50 is not particularly limited, and the following known methods may be exemplified: fixing with an adhesive applied to the continuous telescopic member 231; fixing with an adhesive applied to the inner surfaces of the skin-side sheet 21 and the non-skin-side sheet 22 (hereinafter referred to as "a pair of sheets 21 and 22"); and is fixed by a pair of welds across the continuous telescoping member 231, etc.

In fig. 4, the pair of end fixing portions 50 are disposed on the inner side in the width direction with respect to the pair of locking portions 40, and are independent from the pair of locking portions 40. However, the present invention is not limited thereto. The pair of locking portions 40 may serve as a pair of end fixing portions. That is, the diaper 1 may not have the end fixing portions 50 shown in fig. 4.

Further, the plurality of continuous telescopic members 231 includes at least one "first continuous telescopic member 231a" and at least one "second continuous telescopic member 231b".

In addition, the first continuous stretchable member 231a (first stretchable member of the invention) has a "non-fixed portion 51", and the non-fixed portion 51 is not fixed to the pair of sheets 21 and 22 and is located on the inner side in the width direction with respect to the end fixed portion 50. On the other hand, the second continuous expansion member 231b (second expansion member of the present invention) has a "fixing portion 52", and the fixing portion 52 is fixed to the pair of sheets 21 and 22 at least in a region overlapping the non-fixing portion 51 in the width direction. The fixing portion 52 may be formed integrally with the end fixing portions 50 and 50, or may be formed separately from the end fixing portion 50.

In the first embodiment, the non-fixed portion 51 is continuously arranged from the one-side end fixed portion 50 to the other-side end fixed portion 50 in the width direction (see fig. 4). The fixing portion 52 is continuously arranged from the one-side end fixing portion 50 to the other-side end fixing portion 50 in the width direction in a manner corresponding to the position where the non-fixing portion 51 is provided (see fig. 4).

However, the non-fixed portion 51 of the first continuous expansion member 231a may be disposed in only a part of the widthwise region between the end fixed portions 50 and 50. In this case, the fixed portion 52 of the second continuous expansion member 231b may be provided at least at a portion where the non-fixed portion 51 is provided in the width direction.

In the diaper 1, in the portion (the fixing portion 52) where the waist stretchable member 23 is fixed to the pair of sheets 21 and 22, the rigidity of the waist portion 20 is increased due to curing or the like of the adhesive, as compared with the portion (the non-fixing portion 51) where the waist stretchable member is not fixed. Therefore, since the first continuous stretchable member 231a has the non-fixed portion 51, the area of the high-rigidity portion can be reduced as compared with, for example, a case where the non-fixed portion 51 is not provided (a case where the waist stretchable member 23 is fixed to the pair of sheets 21 and 22 over almost the entire area). This can enhance the softness of the waistline portion 20, so that the wearing comfort of the waistline portion 20 can be improved.

Therefore, in the present embodiment, the length L51 of the non-fixed portion 51 (the total length of the non-fixed portion 51 provided for a certain first continuous expansion member 231a in the width direction) is longer than the length (width) W10 of the absorbent main body 10 in the width direction. As described above, since the absorbent main body 10 has the absorbent core 11A formed of the liquid-absorbent fibers, the absorbent main body has high rigidity as compared with the waistline portion 20 and the like. Therefore, in the region where the waist portion 20 and the absorbent main body 10 overlap in the width direction, the waist portion 20 becomes stiffer than in the region where the absorbent main body 10 does not overlap with the waist portion. This results in a risk of discomfort or unpleasant feeling to the wearer when wearing the diaper 1. In contrast, in the diaper 1, the non-fixed portion 51 is provided in a wider range than the portion where the waist portion 20 overlaps the absorbent main body 10 in the width direction so that the wearer (user) hardly feels the hardness of the absorbent main body 10 in that portion. In particular, in the region in contact with the central portion of the wearer's body, the wearer can easily feel softness. Therefore, the wearer hardly perceives discomfort or unpleasant feeling in the waist portion 20.

However, since the first continuous stretchable member 231a is not fixed to the pair of sheets 21 and 22 in the non-fixed portion 51, there is a case where the first continuous stretchable member 231a (non-fixed portion 51) moves in the up-down direction when the diaper 1 is put on. That is, there is a risk that the first continuous expansion member 231a is displaced in position in the up-down direction with respect to the waistline portion 20. In addition, during wearing of the diaper 1, when the position displacement of the first continuous stretchable member 231a in the up-down direction occurs in the waistline portion 20, there is a risk that the fold (tucking) occurs in the sheets 21 and 22 constituting the waistline portion 20, or that the tightening in the waistline portion of the wearer becomes uneven, thereby deteriorating the fit of the waistline portion 20.

In contrast, in the present embodiment, since the fixed portion 52 is provided in the region overlapping the region where the non-fixed portion 51 is provided in the width direction, the up-down movement of the first continuous expansion member 231a (the non-fixed portion 51) is restricted by the second continuous expansion member 231b (the fixed portion 52). This can suppress occurrence of turnover in the waist portion 20 and/or deterioration of the fit. That is, in the diaper 1, the provision of the non-fixing portion 51 enhances the flexibility of the waistline portion 20, and the provision of the fixing portion 52 at a predetermined position can effectively suppress the occurrence of the fold-over in the waistline portion 20 or the like.

In the present embodiment, as shown in fig. 4, the non-fixed portion 51 is arranged continuously from the one end fixed portion 50 to the other end fixed portion 50 in the width direction. That is, the non-fixed portion 51 is provided in the entire region between the pair of end fixed portions 50 and 50. Therefore, the width direction length L51 of the non-fixed portion 51 becomes longer as compared with the case where the non-fixed portion 51 is provided only in a part of the region between the end fixed portions 50 and 50 on both sides in the width direction, so that the area of the low rigidity portion in the waistline portion 20 can be increased. This can further enhance the softness of the waist portion 20.

Further, the fixing portion 52 is continuously arranged from the one end fixing portion 50 to the other end fixing portion 50 in the width direction, corresponding to the non-fixing portion 51. That is, the fixing portion 52 is provided in the entire region between the pair of end fixing portions 50 and 50. In the case of increasing the width-direction length of the non-fixed portion 51 as described above, the range in which the first continuous stretchable member 231a is not fixed to the pair of sheets 21 and 22 is widened. That is, the first continuous expansion member 231a (the non-fixed portion 51) can move in the up-down direction within a wide widthwise region, resulting in an increased risk of positional displacement of the first continuous expansion member 231 a. However, in the present embodiment, the second continuous expansion and contraction member 231b is fixed by the fixing portion 52 in a wide width range. Therefore, even when an attempt is made to move the non-fixed portion 51 of the first continuous expansion member 231a in the up-down direction, the movement is restricted by the fixed portion 52 of the second continuous expansion member 231b, so that occurrence of large positional displacement is more easily suppressed. Therefore, even in the case where the flexibility of the waist portion 20 is enhanced by expanding the range of the non-fixed portion 51, the occurrence of folding of the waist portion 20 or deterioration of the fitting property when the diaper is put on can be reliably suppressed.

Note that the fixing portion 52 is not necessarily provided in the entire region between the end fixing portions 50 and 50 on both sides in the width direction. However, it is desirable that the fixing portion 52 is continuously provided over the entire region R1 overlapping the absorbent core 11A at least in the width direction (refer to fig. 4). Because the second continuous stretchable member 231b is fixed to the pair of sheets 21 and 22 in this region R1, the stretching force of the second continuous stretchable member 231b easily acts on the entire region R1, so that the waist portion 20 more easily conforms to the skin of the wearer at least in the region R1. Therefore, in the region R1, the positional displacement of the absorbent core 11A in the width direction hardly occurs, so that leakage of excrement from the absorbent core 11A is more easily suppressed.

In addition, it is desirable that at least one of the one or more fixing portions 52 provided continuously in the width direction over the entire region R1 is arranged to overlap with the absorbent main body 10 in the longitudinal direction. In other words, it is desirable that the diaper 1 has a portion where the fixing portion 52 of the second continuous stretchable member 231b overlaps with the absorbent main body 10 when the diaper 1 is viewed in the thickness direction. In the case where the second continuous stretchable member 231b is fixed to the skin-side sheet 21 in the region R1, the skin-side sheet 21 is easily fixed to the body (skin) of the wearer due to the stretching force of the second continuous stretchable member 231b. This makes it easier to suppress positional displacement in the up-down direction of the absorbent core 11A indirectly fixed to the skin-side sheet 21. That is, the up-down direction (longitudinal direction) position shift and the width direction position shift of the absorbent core 11A are suppressed. Therefore, the fit of the absorbent core 11A to the wearer is improved, the excrement hardly leaks, and the wearing comfort of the diaper 1 is enhanced.

It should be noted that, in the present embodiment, as shown in fig. 4, at least one fixing portion 52 is provided between the upper end 10eu of the absorbent main body 10 and the upper end 11Aeu of the absorbent core 11A (this region is also referred to as "inner tab") in the longitudinal direction. In other words, when the diaper 1 is viewed in the thickness direction, at least one fixing portion 52 of the second continuous stretchable member 231b is provided at a position overlapping the absorbent main body 10 and not overlapping the absorbent core 11A. In this case, the expansion and contraction force of the second continuous expansion and contraction member 231b does not act on the region overlapping the absorbent core 11A. Therefore, when the diaper 1 is put on, the force that contracts the absorbent core 11A or excessively presses the absorbent core 11A against the skin side of the wearer hardly acts. This suppresses the damage of the absorbent core 11A to the absorbent performance, so that the excrement hardly leaks. In addition, the fixing portions 52 make it easier for the inner panel of the absorbent main body 10 to fit to the body of the wearer, making it difficult to form a gap between the absorbent main body 10 and the body of the wearer in the inner panel. This makes it easier to suppress leakage of excrement such as urine from the upper end portion of the absorbent main body 10 to the outside of the diaper 1. This can help to suppress leakage of excrement while enhancing the fit of the absorbent core 11A.

In addition, in the diaper 1, among the plurality of continuous stretch members 231 arranged in the waistline portion 20, the number of the first continuous stretch members 231a (the number of elastic strands) is larger than the number of the second continuous stretch members 231b (the number of elastic strands). For example, in fig. 4, the waist portion 20 is provided with three first continuous expansion members 231a and two second continuous expansion members 231b. The greater the number of first continuous expansion members 231a, the greater the number of non-fixed parts 51. This makes it possible to reduce the area of the high rigidity portion. That is, setting the number of non-fixed portions 51 to be larger than the number of fixed portions 52 reduces the proportion of the high rigidity region in the waistline portion 20, so that the flexibility of the waistline portion 20 can be further improved. For example, in the case where the wearer of the diaper 1 is an infant or an elderly person whose skin is weak, the improvement of the softness of the waist portion 20 makes it possible to prevent the skin of the wearer from being damaged and to suppress uncomfortable feeling. Therefore, this configuration is effective.

However, in the diaper 1, the number of the second continuous stretchable members 231b (the number of elastic strands) may be equal to or greater than the number of the first continuous stretchable members 231a (the number of elastic strands) among the plurality of continuous stretchable members 231 arranged in the waistline portion 20. The greater the number of second continuous expansion members 231b, the greater the number of fixing portions 52. This makes it easier to firmly fix the second continuous telescopic member 231b to the pair of sheets 21 and 22. That is, setting the number of the fixed portions 52 equal to or greater than the number of the non-fixed portions 51 increases the proportion of the portion of the waist portion 20 where the second continuous expansion and contraction member 231b is fixed, and therefore the positional displacement of the second continuous expansion and contraction member 231b becomes hardly occurred. In addition, as described above, fixing the position of the second continuous expansion member 231b makes it easier to restrict the upward and downward movement of the first continuous expansion member 231 a. That is, the positional displacement of the continuous expansion and contraction member 231 can be suppressed as a whole. This further suppresses occurrence of turnover in the waistline portion 20 or deterioration of the fitting property.

In addition, in the diaper 1, at least one first stretchable member 231a is arranged between two second continuous stretchable members 231b and 231b arranged adjacent to each other in the up-down direction (longitudinal direction). That is, in the longitudinal direction, the non-fixed portion 51 of the diaper 1 having the first stretchable member 231a is arranged as a portion sandwiched between the fixed portions 52 and 52 of the second continuous stretchable member 231b in the up-down direction. Even when the positional displacement in the up-down direction of the first telescoping member 231a (the non-fixed portion 51) occurs in such a portion, since the up-down direction movement is restricted by the fixed portions 52 and 52 arranged to sandwich the first telescoping member 231a from above and below, the influence of the positional displacement can be reduced. Therefore, the position of the non-fixed portion 51 of the first continuous expansion member 231a is hardly greatly displaced in the up-down direction, so that occurrence of folding of the waist portion 20 or deterioration of the fitting property of the waist portion 20 due to the displacement of the position of the continuous expansion member 231 can be more effectively suppressed.

In the diaper 1, the first continuous stretchable member 231a and the second continuous stretchable member 231b are alternately arranged in parallel in the up-down direction (longitudinal direction). In other words, the diaper 1 has a portion in which the first continuous stretchable member 231a is arranged between two second continuous stretchable members 231b and 231b adjacent in the up-down direction, and such a portion is repeatedly provided in the longitudinal direction. With the above-described configuration, the position of the non-fixed portion 51 of the first continuous expansion member 231a is hardly greatly displaced in the up-down direction as in the above-described case. This makes it possible to more effectively suppress occurrence of the turnover in the waistline portion 20 or deterioration of the fitting property of the waistline portion 20 due to the positional displacement of the continuous stretchable member 231. In addition, since the fixed portions 52 and the non-fixed portions 51 are alternately arranged side by side in the up-down direction, when the waist portion 20 is contracted in the width direction during the wearing of the diaper 1, wrinkles of a neat shape are easily formed on the surface of the waist portion 20. That is, the uniformly shaped gathers regularly positioned side by side can improve the aesthetic appearance of the diaper 1.

As shown in fig. 4, the waist portion 20 has a discontinuous extensible member 232 below (longitudinally inside) the continuous extensible member 231 located at the lowermost position. The discontinuous extensible members 232 are each discontinuous in at least a portion of the region R1 overlapping the absorbent core 11A in the width direction. That is, some of the waist stretchable members 23 overlapped with the absorbent main body 10 in the longitudinal direction have a non-stretchable region (discontinuous portion) at the widthwise central portion. Therefore, contraction of the absorbent core 11A due to the waist stretchable member 23 can be suppressed, so that flatness of the absorbent core 11A can be ensured.

In addition, it is also preferable that the discontinuous extension members 232 each have an end fixing portion 55 and a non-fixing portion 56. The end fixing portion 55 is a portion in which both widthwise ends in the continuous portion of each discontinuous extensible member 232 are fixed to the pair of sheets 21 and 22. The non-fixed portion 56 is a portion of the discontinuous extensible member 232 between the end fixed portions 55 that is not fixed to the pair of sheets 21 and 22. Specifically, as shown in fig. 4, a pair of end fixing portions 55 and 55 are arranged at the end portion on the side in the width direction of the waist portion 20 and the end portion on the side in the width direction of the absorbent core 11A, and a non-fixing portion 56 is arranged between the pair of end fixing portions 55 and 55. Similarly, a pair of end fixing portions 55 and 55 are disposed at the other end portion in the width direction of the absorbent core 11A and the other end portion in the width direction of the waistline portion 20, and a non-fixing portion 56 is disposed between the pair of end fixing portions 55 and 55.

Providing the non-fixed portion 56 also in the discontinuous extensible member 232 as described above enhances the softness of the waistline portion 20. However, the present invention is not limited thereto. The discontinuous telescopic member 232 does not necessarily have the non-fixed portion 56. In addition, a portion of the discontinuous telescopic member 232 may be fixed in a region between the pair of end fixing portions 55 and 55. In this case, when the diaper 1 is put on, the waistline portion 20 is easily fitted in the region between the pair of end fixing portions 55 and 55, so that the waistline portion 20 is more easily restrained from floating from the skin of the wearer. In addition, with respect to the region between the pair of end fixing portions 55 and 55, the following configuration is also acceptable: among the plurality of discontinuous expansion members 232, 232 … arranged in parallel in the up-down direction, a member having a fixing portion in this region and a member having no fixing portion in this region are alternately arranged. In this case, both flexibility and conformability of the region can be achieved.

As shown in fig. 2 and 3, a post-treatment tape 70 is provided in the back side waistline portion 30 of the diaper 1. The post-treatment belt 70 is a substantially rectangular belt-like member (belt member) long in the up-down direction. The post-processing belt 70 has a belt fixing portion 71 (shown by a hatched portion in fig. 2) on one side in the up-down direction (longitudinal direction), and an adhesive portion 72 on the other side in the up-down direction (longitudinal direction). The tape fixing portion 71 is formed of an adhesive or the like. The post-treatment tape 70 is non-peelably fixed to the non-skin side face of the non-skin side sheet 32 of the back side waist portion 30 with a tape fixing portion 71. The adhesive is applied to the adhesive portion 72. Before the diaper 1 is used, a part of the post-treatment tape 70 is folded in a state where the adhesive portion 72 is located inside. Therefore, the adhesive portion 72 is not exposed to the outside, and the adhesive surface of the adhesive portion 72 is protected.

When the diaper 1 is discarded after use, the diaper 1 is rolled up in the longitudinal direction in such a manner that the absorbent main body 10 faces inward, and the adhesive portion 72 is exposed by stretching and pulling the folded post-treatment tape 70 with respect to the diaper 1. The adhesive portion 72 is then wrapped around the diaper 1. Therefore, the diaper 1 can be kept in a rolled state, so that the diaper 1 can be discarded without leakage of excrement or the like that has adhered to the inside (absorbent main body 10) of the diaper 1 to the outside.

In the present embodiment, the post-processing belt 70 is arranged such that the belt fixing portion 71 overlaps with the fixing portion 52 of the second continuous expansion and contraction member 231b (331 b) when viewed in the thickness direction. In the case where the tape fixing portion 71 of the post-processing tape 70 does not overlap with the fixing portion 52 when viewed in the thickness direction, there is a risk of causing the following problems. That is, when the aftertreatment belt 70 is pulled toward the non-skin side in the thickness direction after the diaper 1 is used, the non-skin side sheet 22 (32) may float from the skin side sheet 21 (31) because only the non-skin side sheet 22 (32) is pulled toward the non-skin side together with the belt fixing portion 71 in the waistline portion 20 (the back-side waistline portion 30). In this case, there is a risk that the non-skin side sheet 22 (32) is torn or that the force pulling the treated belt 70 is hardly transmitted to the waist portion 20 (back side waist portion 30).

In contrast, in the present embodiment, the tape fixing portion 71 and the fixing portion 52 overlap. Therefore, when the after-treatment tape 70 is pulled toward the non-skin side in the thickness direction after the diaper 1 is used, the sheets of both the skin-side sheet 21 (31) and the non-skin-side sheet 22 (32) joined in the thickness direction via the fixing portion 52 are pulled. This prevents tearing of the sheets 21 (31) and 22 (32) constituting the waistline portion 20, and prevents the force pulling the post-treatment belt 70 from being hardly transmitted to the waistline portion 20. This may facilitate post-treatment of the diaper 1 after use.

< Modification >

Fig. 5 is a schematic plan view of the abdomen-side waist portion 20 of the diaper 1 in the modification. In the modification, a central fixing portion 53 that fixes the first continuous expansion member 231a to the pair of sheets 21 and 22 is provided at the widthwise central portion of the first continuous expansion member 231 a. That is, in the region between the end fixing portions 50 and 50 located on both sides in the width direction, the first continuous expansion member 231a has a central fixing portion 53 in the width direction central portion, and non-fixing portions 51 and 51 on both outer sides in the width direction of the central fixing portion 53. Other configurations of the diaper 1 in the modification are the same as those in the above-described embodiment.

As shown in fig. 4, in the above embodiment, the non-fixed portion 51 continuous in the width direction is provided in the region between the end fixed portions 50 and 50. The first continuous telescopic member 231a is movable in the up-down direction in this region. In particular, in the central portion in the width direction, the amount of movement (amplitude) of the first continuous expansion and contraction member 231a in the up-down direction may become maximum, and thus there is a risk of occurrence of a large positional displacement.

In contrast, in the present modification, the center fixing portion 53 fixes the corresponding first continuous expansion member 231a to the pair of sheets 21 and 22 in the widthwise center portion. Therefore, the movement of the first continuous expansion member 231a in the up-down direction is suppressed in the widthwise central portion. That is, the amount of movement (amplitude) of the first continuous expansion and contraction member 231a in the up-down direction decreases. This suppresses positional displacement of the waist stretchable member 23 in the up-down direction, so that the folding of the waist portion 20 or deterioration of the fitting property can be suppressed more easily.

In the case of the modification, the width direction length L51 of the non-fixed portion 51 is longer than the width W10 of the absorbent main body 10 (L51 > W10). That is, the length (L51) is obtained by subtracting the width-direction length L53 of the center fixing portion 53 from the width-direction length between the end fixing portions 50 and 50 on both sides in the width direction, and the length (L51) is larger than the width W10 of the absorbent main body 10. This can prevent the non-fixed portion 51 from narrowing and can maintain the flexibility of the waistline portion 20.

= = Second embodiment= = =

Fig. 6 is a schematic plan view of the abdomen-side waist part 20 of the second embodiment. In the second embodiment, the waistline portion 20 has a sheet engaging portion 60 (indicated by a thick black line in fig. 6) on the inner side in the width direction with respect to the end fixing portion 50, and the sheet engaging portions 60 are portions where the pair of sheets 21 and 22 are engaged with each other. Note that as a joining method of the pair of sheets 21 and 22 in the sheet joining portion 60, welding, joining with an adhesive, or the like may be exemplified.

In the non-fixed portions 51 and 56 of the waist telescopic member 23, the pair of sheets 21 and 22 are not engaged with each other, and thus there is a risk of separation. In the case where the pair of sheets 21 and 22 are separated, the non-skin side sheet 22 is more easily visually recognized in a floating state in the appearance of the diaper 1. Further, contraction of the waist telescopic member 23 is more likely to generate irregular, large longitudinal wrinkles. In particular, in the diaper 1, since the width direction length (width) L51 of the non-fixed portion 51 is longer than the width W10 of the absorbent main body 10, the pair of sheets 21 and 22 are easily separated greatly in the thickness direction, and there is a risk that the floating of the non-skin side sheet 22 becomes noticeable. In contrast, in the second embodiment, providing the sheet joining portion 60 in the waistline portion 20 makes it possible to suppress floating of the non-skin side sheet 22 and to enhance the appearance of the diaper 1.

The sheet joining portions 60 shown in fig. 6 are each longer in the width direction of the diaper 1 than in the up-down direction (longitudinal direction). In addition, none of the sheet joining portions 60 is continuous with a portion (e.g., the fixing portion 52 of the second continuous stretch member 231b, etc.) where the corresponding waist stretch member 23 on the inner side in the width direction with respect to the end fixing portion 50 is fixed to the pair of sheets 21 and 22, and the sheet joining portions 60 are arranged at intervals in the up-down direction. That is, the sheet joining portion 60 is arranged so as not to intersect the waist telescopic member 23. Specifically, the sheet joining portions 60 shown in fig. 6 extend continuously from one end edge to the other end edge of the waistline portion 20, and are respectively arranged between all the waistline telescoping members 23 arranged side by side in the up-down direction.

Providing the sheet engaging portion 60 long in the width direction in the waistline portion 20 as described above makes it easier to form regular fine longitudinal wrinkles when the waistline telescoping member 23 is contracted. Thus, the appearance of the diaper 1 is improved, so that a good impression can be given to the user of the fit of the waist portion 20.

Further, the up-down movement of the waist telescopic member 23 is restricted by the sheet engaging portion 60. Therefore, the vertical gap between the waist stretchable members 23 is easily maintained, and the occurrence of folding in the waist portion 20 or deterioration of the fitting property can be easily suppressed.

Note that, in the case where the waist portion 20 has the sheet joining portion 60, there is a risk that the softness of the waist portion 20 is reduced as compared with the case where the waist portion 20 does not have the sheet joining portion 60. However, the sheet engaging portion 60 hardly comes into close contact with the skin of the wearer, as compared with the waist telescopic member 23. Therefore, the user hardly feels the hardness of the adhesive or the like of the sheet joining portion 60, compared with the hardness of the adhesive or the like of fixing the waist stretchable member 23 to the pair of sheets 21 and 22, so that deterioration of wearing comfort of the waist portion 20 can be suppressed.

The sheet joining portion 60 of the second embodiment is not limited to the sheet shape shown in fig. 6. For example, the following configuration is acceptable: the sheet engaging portions 60 are intermittently arranged in the width direction rather than continuously extending in the width direction. Further, the sheet joining portions 60 may be arranged in only some of the plurality of regions between the waist stretchable members 23 arranged side by side in the up-down direction. Further, the sheet joining portion 60 may be disposed inside in the width direction with respect to the locking portion 40 or may be disposed inside in the width direction with respect to the end fixing portion 50. Because the sheet joining portion 60 is arranged in the region in the waist stretchable member 23 where the non-fixing portion 51 is provided, when the diaper 1 is put on, the waist portion 20 can be restrained from floating from the skin of the wearer in this region.

= = Third embodiment= = =

Fig. 7 is a schematic plan view of the abdomen-side waist part 20 of the third embodiment. As in the second embodiment, the waistline portion 20 of the third embodiment has a pair of sheet engaging portions 60 where the sheets 21 and 22 are engaged with each other, on the inner side in the width direction with respect to the end fixing portion 50. However, in the third embodiment, the shape and configuration of the sheet engaging portion 60 are different from those of the second embodiment. The configuration other than the shape and arrangement of the sheet joining portion 60 is substantially the same as that of the second embodiment.

In the third embodiment, as shown in fig. 7, the virtual linear sheet joining portion 60 is intermittently formed along the longitudinal direction (up-down direction) and is arranged so as not to intersect the waist telescopic member 23. That is, between the two waist stretchable members 23 and 23 adjacent to each other in the longitudinal direction (up-down direction), a longitudinally long region extending in the longitudinal direction is joined by using a joining means such as welding or an adhesive, thereby forming a virtual linear sheet joining portion 60 extending in the longitudinal direction. In the waistline portion 20, a plurality of virtual linear sheet joining portions 60 extending in the longitudinal direction are arranged side by side at intervals in the width direction.

Providing the sheet joining portion 60 where the pair of sheets 21 and 22 are joined as described above can suppress the floating of the non-skin side sheet 22, so that the appearance of the diaper 1 can be improved as in the second embodiment. Further, since the movement of the waist stretchable member 23 in the up-down direction is restricted by the sheet joining portion 60, the occurrence of folding in the waist portion 20 or deterioration of the fitting property can be suppressed. Note that, in the third embodiment, since the sheet joining portion 60 and the waist telescopic member 23 do not have portions overlapping each other, the area of the portion of the waist portion 20 fixed to the pair of sheets 21 and 22 is not increased. Therefore, the flexibility of the waist portion 20 is easily maintained.

In the third embodiment, a plurality of virtual linear sheet joining portions 60 extending in the longitudinal direction (up-down direction) of the waist portion 20 are arranged in parallel in the width direction (left-right direction), so that regular wrinkles are easily formed in the waist portion 20. That is, when the waist portion 20 is contracted in the width direction due to the stretchability of the waist stretchable member 23, uneven deformation in the thickness direction easily occurs from the linear sheet joining portion 60 extending in the longitudinal direction in the pair of sheets 21 and 22. Therefore, on the surface of the waistline portion 20, the pleats (longitudinal pleats) extending in the longitudinal direction along the sheet joining portion 60 are arranged in parallel regularly in the width direction. Such formation of wrinkles can further soften the texture of the waist portion 20 and can improve the appearance of the diaper 1.

Note that the following configuration is acceptable: the sheet joint portion 60 is formed in a linear shape extending continuously in the longitudinal direction, and the sheet joint portion 60 and the telescopic member 23 overlap at a predetermined position. In this case, since the area of the joint portion where the stretchable member 23 is joined to the pair of sheets 21 and 22 increases, there is a risk of deterioration in the flexibility of the waistline portion 20 as compared with the case where the sheet joint portion 60 is not overlapped with the stretchable member 23. However, since the contraction force when the expansion member 23 contracts in the width direction easily acts on the pair of sheets 21 and 22, the sheets 21 and 22 easily contract in the width direction due to the contraction force. This makes it easier to form longitudinal wrinkles in the waist portion 20. Accordingly, the texture of the waist portion 20 is further softened, and thus the user hardly becomes aware of the deterioration of the softness of the waist portion 20. Therefore, even in the case where the sheet joining portion 60 is formed in a straight line shape that extends continuously in the longitudinal direction, deterioration in wearing comfort of the waistline portion 20 can be suppressed.

= = Other embodiments= = = =

While the above-described embodiments of the present invention have been described, the above-described embodiments are intended to aid in understanding the present invention, and are not intended to limit the explanation of the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit thereof, and furthermore, it goes without saying that equivalents thereof are also included in the present invention.

Description of the reference numerals

1: Pants-type disposable diapers (absorbent articles),

10: The absorbent body is provided with a plurality of absorbent members,

11: Absorber, 11A: absorbent core, 11B: the core wrap sheet is provided with a plurality of layers,

12: Front sheet, 13: back sheet, 14: the outer sheet is arranged on the outer side of the outer sheet,

20: Abdomen-side waistline portion (waistline portion), 30: a back side waist portion (waist portion),

21. 31: Skin side panels (sheets),

22. 32: A non-skin side panel (sheet),

23. 33: A waist-shaped telescopic component which is arranged on the waist,

231: Continuous telescoping member (telescoping member), 232: a discontinuous and telescoping member is provided that,

231A: a first continuous telescoping member (first telescoping member),

231B, 331b: a second continuous telescoping member (second telescoping member),

40: A locking part, which is provided with a locking groove,

50. 55: An end fixing part, a fixing part and a fixing part,

51. 56: A non-fixed part, which is provided with a plurality of fixing parts,

52: A fixing part, a fixing part and a fixing part,

53: A central fixing part, a central fixing part and a central fixing part,

60: The sheet material engaging portion is provided with a plurality of engaging portions,

70: Post-treatment belt, 71: band fixing portion, 72: and an adhesive part.

Claims (12)

1. An absorbent article having a width direction, a longitudinal direction and a thickness direction in an unfolded state,

The absorbent article includes a pair of waist portions and an absorbent main body having an absorbent core,

At least one of the pair of waist portions has a pair of sheets and a plurality of stretchable members arranged between the pair of sheets and stretchable in the width direction,

Each of the expansion and contraction members is continuously arranged from one end portion to the other end portion in the width direction of the one of the waist portions, each of the expansion and contraction members has a pair of end fixing portions in which both end portions in the width direction of the expansion and contraction member are fixed to the pair of sheets,

The plurality of telescopic members comprise

At least one first stretchable member having an unfixed portion, the unfixed portion being unfixed to the pair of sheets, on an inner side in the width direction with respect to the end-fixed portion, and

At least one second stretchable member having a fixing portion, the fixing portion being fixed to the pair of sheets in at least a region overlapping the non-fixing portion in the width direction,

The length of the non-fixed portion in the width direction is longer than the length of the absorbent main body in the width direction.

2. The absorbent article of claim 1, wherein the absorbent article comprises,

The first telescoping member has the non-fixed portion in an entire region between the pair of end fixed portions in the width direction.

3. The absorbent article of claim 1, wherein the absorbent article comprises,

The first stretchable member has a central fixing portion at a central portion in the width direction, the central fixing portion being a portion where the first stretchable member is fixed to the pair of sheets, and

The first telescoping member has the non-fixed portion on both outer sides in the width direction of the central fixed portion.

4. The absorbent article as set forth in any one of claims 1 to 3 wherein,

The second telescoping member has the fixing portion in the entire region between the pair of end fixing portions in the width direction.

5. The absorbent article as set forth in any one of claims 1 to 3 wherein,

The number of the first expansion members provided to at least one of the pair of waist portions is greater than the number of the second expansion members provided to at least one of the pair of waist portions.

6. The absorbent article as set forth in any one of claims 1 to 3 wherein,

The number of the second stretchable members provided to at least one of the pair of waist portions is equal to or greater than the number of the first stretchable members provided to at least one of the pair of waist portions.

7. The absorbent article as set forth in any one of claims 1 to 3 wherein,

In the longitudinal direction, at least one of the first telescopic members is arranged between two of the second telescopic members arranged adjacent to each other.

8. The absorbent article as set forth in claim 7 wherein,

The first telescopic members and the second telescopic members are alternately arranged side by side in the longitudinal direction.

9. The absorbent article as set forth in any one of claims 1 to 3 wherein,

The absorbent article has a portion where the absorbent main body and the fixing portion overlap when viewed in the thickness direction.

10. The absorbent article as in claim 9, wherein,

In a region overlapping the absorbent main body when viewed in the thickness direction, the fixing portion is provided in a region between an upper end of the absorbent main body and an upper end of the absorbent core in the longitudinal direction.

11. The absorbent article as set forth in any one of claims 1 to 3 wherein,

A post-treatment belt for holding the absorbent article in a rolled-up state when the absorbent article is discarded after use is provided on the non-skin side of the waistline portion,

The post-treatment belt has a belt fixing portion for fixing the post-treatment belt to the non-skin side of the waistline portion, and

The absorbent article has a portion where the belt fixing portion overlaps the fixing portion when viewed in the thickness direction.

12. The absorbent article as set forth in any one of claims 1 to 3 wherein,

The absorbent article further includes a sheet engaging portion in which opposing faces of the pair of sheets are engaged with each other, and

The sheet engaging portion and the telescoping member do not have an overlapping portion.