Absorbent article

Abstract

An absorbent article (1) comprising a pair of waist portions (20, 30) and an absorbent body (10) wherein each waist portion (20) comprises a pair of sheets (21, 22) and a plurality of stretchable members (23); each stretchable member (23) is continuously arranged from one end to the other end of the waist portion (20) in the width direction and has end fixing portions (50) on both ends in the width direction; the plurality of stretchable members (23) include: a first stretchable member (231a) having a non-fixed portion (51) that is not fixed to the pair of sheets (21, 22) on the inside in the width direction with respect to the end fixed portion (50); and a second stretchable member (231b) having a fixed portion (52) fixed to the pair of sheets (21, 22) in a region overlapping the non-fixed portion (51) with respect to the width direction; in the width direction, the length of the non-fixed portion (51) is shorter than the length of the absorbent body (10).

Description

[0001] This application is a divisional application of the invention patent application named "Absorbent Article", with an international application date of March 19, 2021, an international application number of PCT / JP2021 / 011389, and a national application number of 202180082267.8. Technical Field

[0002] The present invention relates to an absorbent article. Background Art

[0003] In an absorbent article, as a stretchable structure of a waist portion, there is a structure including an elongated elastic stretchable member arranged along a stretching / contracting direction and arranged between two sheet layers. For example, Patent Document 1 discloses the following stretchable structure: both ends of the elastic stretchable member are fixed to two sheet layers; the elastic stretchable member has a free portion between these fixed ends, which is not fixed to the two sheet layers; and a sheet connection portion is provided in the region between the fixed ends, wherein the two sheet layers are connected with a hot melt adhesive. By the continuous sheet connection portion in the stretching / contracting direction, a wave shape (wrinkle) is formed so that the two sheet layers are attached to each other, and the apex of the wrinkle is slightly bent, thereby producing a soft touch.

[0004] Citation List

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6254625 Summary of the invention Technical issues

[0007] In the waist portion of the absorbent article of Patent Document 1, the elastic stretchable member is not fixed to the two sheet layers between the two fixed ends of the elastic stretchable member. Therefore, there is a situation where, when the absorbent article is put on, the relative position of the elastic stretchable member relative to the waist portion is offset (for example, the position is offset in the vertical direction), resulting in a risk of poor fit or the sheet constituting the waist portion being "wrinkled". In contrast, in the case where at least a portion of the elastic stretchable member is fixed to the waist portion, the positional offset of the elastic stretchable member can be suppressed. However, for example, when the length in the width direction of the portion of the elastic stretchable member located between the fixed ends at both ends of the elastic stretchable member and not fixed to the two sheet layers is longer than the length in the width direction of the absorbent portion, the region of the absorbent portion is not directly connected to the elastic stretchable member. This results in the risk of the absorbent portion being offset in the vertical direction when the absorbent article is worn.

[0008] The present invention has been achieved in view of the above-mentioned problems, and one aspect of the present invention is to suppress the phenomenon that the waist portion of an absorbent article curls up, while enhancing the flexibility of the waist portion. Solution to the problem

[0009] A main aspect of the present invention for achieving the above-mentioned aspects is an absorbent article having a width direction, a longitudinal direction and a thickness direction in an unfolded state, the absorbent article comprising: a pair of waist portions; and an absorbent body including an absorbent core, at least any one of the pair of waist portions comprising: a pair of sheets; and a plurality of stretchable members, the plurality of stretchable members being arranged between the pair of sheets and being stretched and contracted in the width direction, each of the plurality of stretchable members being arranged continuously in the width direction from one end portion to the other end portion of the any one of the pair of waist portions, each of the plurality of 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 comprising: at least one first stretchable member having a non-fixed portion which is not fixed to the pair of sheets and is located on the inner side relative to the end fixing portion in the width direction; and at least one second stretchable member having a fixed portion fixed to the pair of sheets at least in an area overlapping with the non-fixed portion relative to the width direction, the length of the non-fixed portion in the width direction being shorter than the length of the absorbent body in the width direction.

[0010] Other features of the present invention besides those described above will become apparent by reading the description of this specification and referring to the accompanying drawings.

[0011] Advantageous Effects of the Invention

[0012] According to the present invention, it is possible to suppress the occurrence of wrinkles in the waist portion of the absorbent article and enhance the flexibility of the waist portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 1 is a schematic perspective view of a disposable diaper 1 in the form of a pant.

[0014] Figure 2 is a schematic plan view of the diaper 1 in the unfolded and stretched state.

[0015] Figure 3 is along Figure 2 Schematic cross-sectional view taken along line II.

[0016] Figure 4 is a schematic plan view of the front waist portion 20 according to the first embodiment.

[0017] Figure 5 is a schematic plan view of the front waist portion 20 for explaining the overlapping fixing portion 53 in the first embodiment.

[0018] Figure 6 : is a schematic plan view of the front waist portion 20 in the modified example.

[0019] Figure 7 is a schematic plan view of a front waist portion 20 according to a second embodiment.

[0020] Figure 8 2 is a schematic plan view of the front waist portion 20 in another modified example.

[0021] Fig. 9 is a schematic plan view of a front waist portion 20 according to a third embodiment. DETAILED DESCRIPTION

[0022] At least the following matters will become clear through the description of this specification and the accompanying drawings.

[0023] An absorbent article having a width direction, a longitudinal direction and a thickness direction in an unfolded state, the absorbent article comprising: a pair of waist parts; and an absorbent body including an absorbent core, at least any one of the pair of waist parts comprising: a pair of sheets; and a plurality of stretchable members, the plurality of stretchable members being arranged between the pair of sheets and being stretched and contracted in the width direction, each of the plurality of stretchable members being arranged continuously in the width direction from one end part to the other end part of the any one of the pair of waist parts, each of the plurality of stretchable members having a pair of end fixing parts in which both end parts in the width direction of the stretchable members are fixed to the pair of sheets, the plurality of stretchable members comprising: at least one first stretchable member having a non-fixed part which is not fixed to the pair of sheets and is located on the inner side relative to the end fixing part in the width direction; and at least one second stretchable member having a fixed part fixed to the pair of sheets at least in an area overlapping with the non-fixed part relative to the width direction, the length of the non-fixed part in the width direction being shorter than the length of the absorbent body in the width direction.

[0024] According to the above absorbent article, since the first stretchable member has the non-fixed portion, the area of ​​the portion having high rigidity in the waist portion is reduced, and flexibility can be improved. In addition, since the vertical movement of the non-fixed portion of the first stretchable member is restricted by the fixed portion, positional deviation of the stretchable member is less likely to occur. This makes it possible to suppress the occurrence of wrinkles in the waist portion and deterioration of fit.

[0025] In such an absorbent article, it is desired that the absorbent core has a minimum portion, wherein the length of the absorbent core in the width direction is the minimum, and the length of the non-fixed portion in the width direction is shorter than the length of the minimum portion in the width direction and longer than half of the length of the minimum portion in the width direction.

[0026] According to the above absorbent article, the provision of the non-fixed portion enhances flexibility and improves texture. However, if the length of the non-fixed portion is too long, there is a risk of curling. Therefore, by making the length of the non-fixed portion in the width direction shorter than the length of the smallest part of the absorbent core in the width direction and longer than half of the length of the smallest part in the width direction, it is easy to achieve a balance between flexibility in the waist portion and preventing curling.

[0027] In such an absorbent article, it is desired that the pair of waist portions each have side regions respectively positioned on two outer sides in the width direction of the absorbent body, upper regions respectively positioned on two outer sides in the longitudinal direction of the absorbent body and at positions overlapping with the absorbent body relative to the width direction, and a value obtained by dividing the total length of the fixed portions in the side regions by the total length of the multiple stretchable members in the side regions is greater than a value obtained by dividing the total length of the fixed portions in the upper region by the total length of the multiple stretchable members in the upper region.

[0028] According to the absorbent article, a large number of fixing parts are provided in the side regions, which reliably suppresses the phenomenon that the non-fixed parts are easily deflected in the vertical direction (longitudinal direction) so that the absorbent article is easily wrinkled, and the non-fixed parts are made to fit the body of the wearer. In addition, flexibility can be ensured by providing a smaller number of fixing parts in the upper region, which is a portion that is easy to contact the wearer's skin, compared with the side regions.

[0029] In such an absorbent article, it is desired that the non-fixed portion of the first stretchable member spans the center of the absorbent body in the width direction, the second stretchable member is arranged adjacent to the first stretchable member on at least one side in the longitudinal direction, and the second stretchable member has a fixed portion over the entire area extending in the width direction between a pair of end fixed portions.

[0030] According to the above absorbent article, in the non-fixed portion, the positional deviation of the first stretchable member in the vertical direction is more likely to cause curling. However, the second stretchable member is arranged directly below or directly above the first stretchable member having the non-fixed portion and has the fixed portion in the entire area from one end to the other end in the width direction, so the movement of the first stretchable member in the non-fixed portion is suppressed, so that the occurrence of curling can be prevented.

[0031] In such an absorbent article, it is desirable that the absorbent core has a minimum portion in which the length of the absorbent core in the width direction is the minimum, the length of the non-fixed portion in the width direction is shorter than the length of the minimum portion in the width direction, the non-fixed portion spans the center of the absorbent body in the width direction, and the fixed portion extending to the end fixing portion is arranged on at least one of the two side portions outside the non-fixed portion in the width direction.

[0032] According to the above absorbent article, a wrinkling phenomenon is likely to occur in the portion where the non-fixed portion is arranged. However, the fixed portion extending to the end fixed portion is provided on at least one of the two side portions in the width direction of the non-fixed portion, that is, the stretchable member is fixed to the end portion in the width direction, which can make the stretchable member less likely to deviate.

[0033] In such an absorbent article, it is desirable that the absorbent core has a minimum portion in which the length of the absorbent core in the width direction is the minimum, the length of the non-fixed portion in the width direction is shorter than the length of the minimum portion in the width direction, and the second stretchable member has a fixed portion in the width direction over the entire area extending between a pair of end fixed portions.

[0034] According to the absorbent article, the first stretchable member has a non-fixed portion, which reduces the area of ​​the portion with high rigidity in the waist portion and improves flexibility. In addition, by making the length of the non-fixed portion in the width direction shorter than the length of the smallest portion of the absorbent core, the occurrence of wrinkles is suppressed. In addition, since the second stretchable member does not have a non-fixed portion, the deviation of the first stretchable member is suppressed and the fit is enhanced.

[0035] In such an absorbent article, it is desired that the second stretchable member has a fixed portion over the entire area extending between a pair of end fixing portions in the width direction, and the number of first stretchable members provided in at least any one of the pair of waist portions is less than the number of second stretchable members provided in at least any one of the pair of waist portions.

[0036] According to the above absorbent article, by reducing the number of first stretchable members having non-fixed portions, the occurrence of wrinkles in the absorbent article can be suppressed.

[0037] In such an absorbent article, it is desired that the first stretchable member has a fixed portion fixed to a pair of sheets, the absorbent article has an overlapping fixed portion in which the fixed portion of the first stretchable member and the fixed portion of the second stretchable member overlap with respect to the width direction, and the overlapping fixed portion is located on the outside of the absorbent body in the longitudinal direction.

[0038] According to the above absorbent article, the absorbent article has an overlapping fixing portion in which the fixing portion of the first stretchable member and the fixing portion of the second stretchable member overlap with respect to the width direction, and the overlapping fixing portion is arranged outside the absorbent body in the longitudinal direction (vertical direction). This makes it possible to further prevent the absorbent body from being moved upward.

[0039] In such an absorbent article, it is desired that the first stretchable member has a fixed portion fixed to a pair of sheets, the absorbent article has an overlapping fixed portion in which the fixed portion of the first stretchable member and the fixed portion of the second stretchable member overlap with respect to the width direction, and the overlapping fixed portion has a portion that overlaps with the absorbent body in the thickness direction.

[0040] According to the above absorbent article, the overlapping fixed portion is arranged to overlap with the absorbent body, which makes it possible to press the absorbent body without causing displacement, and the fit is enhanced.

[0041] In such an absorbent article, it is desirable that the length in the width direction of the overlapping fixing portion is longer than the length of each end fixing portion.

[0042] According to the above-mentioned absorbent article, by providing an overlapping fixing portion having a length greater than the length of the end fixing portions of the two side portions located in the width direction, the vertical deviation of the stretchable member is suppressed, and the deterioration of the fit of the waist portion can be reduced, compared with the case where an overlapping fixing portion having a length shorter than the length of the end fixing portions is provided.

[0043] In such an absorbent article, it is desirable to provide a post-processing tape on the non-skin side of the waist portion, the post-processing tape being used to keep the absorbent article in a rolled-up state when the absorbent article is discarded after use, the post-processing tape having a tape fixing portion for fixing the post-processing tape to the non-skin side of the waist portion, and the absorbent article having a portion where the tape fixing portion and the fixing portion overlap when viewed in the thickness direction.

[0044] According to the above absorbent article, the tape fixing portion of the post-treatment tape overlaps with the fixing portion of the second stretchable member. Therefore, after the absorbent article is used, when the post-treatment tape is pulled toward the non-skin side in the thickness direction, the pulling force is easily transmitted to both the skin side sheet and the non-skin side sheet constituting the waist portion. Accordingly, this prevents only the non-skin side sheet from being pulled and torn, or prevents the pulling force from being easily transmitted to the waist portion. This can facilitate post-treatment of the absorbent article after use.

[0045] In such an absorbent article, it is desirable that the absorbent article further includes a sheet connecting portion in which facing surfaces of the pair of sheets are connected to each other, and the sheet connecting portion is disposed so as to overlap the non-fixed portion with respect to the width direction.

[0046] According to the absorbent article, when the waist stretchable member contracts, wrinkles are more likely to be formed in the waist portion, thereby improving the external appearance or fit of the waist portion. In addition, the sheet connecting portion is arranged to overlap with the non-fixed portion in the width direction, so that the problem that the first stretchable member having the non-fixed portion is easily offset in the vertical direction (longitudinal direction) can be prevented. In addition, since the area of ​​the portion of the stretchable member of the waist portion fixed to the sheet is not increased, the flexibility of the waist portion can be maintained.

[0047] In such an absorbent article, it is desirable that the absorbent article further includes a graphic that can be visually recognized from the non-skin side, and there is a portion where the graphic and the non-fixed portion overlap when viewed in the thickness direction.

[0048] According to the absorbent article, there is a portion where the graphic and the non-fixed portion overlap when viewed in the thickness direction, which suppresses shrinkage of the region where the graphic exists. This makes the graphic easy to visually recognize, thereby improving the aesthetic impression.

[0049] In such an absorbent article, it is desired that the waist portion has a hydrophobic nonwoven fabric and a hydrophilic nonwoven fabric which is stacked adjacent to the non-skin side of the hydrophobic nonwoven fabric and has a higher hydrophilicity than the hydrophobic nonwoven fabric in at least a partial area, and there is a portion where the non-fixed portion and the hydrophilic nonwoven fabric overlap when viewed in the thickness direction.

[0050] According to the above absorbent article, by providing a hydrophilic nonwoven fabric having high hydrophilicity on the non-skin surface side, moisture such as sweat is absorbed from the wearer's skin, and the absorbed moisture is easily evaporated into the atmosphere. However, since the hydrophilic nonwoven fabric easily contains moisture, when the hydrophilic nonwoven fabric is pressed against the body by the stretchable member of the waist portion, there is a risk that the absorbed moisture returns to the skin. However, overlapping the hydrophilic nonwoven fabric and the non-fixed portion with each other reduces the compressive force, making it possible to suppress the return of liquid from the hydrophilic nonwoven fabric side.

[0051] In such an absorbent article, it is desired that at least any one of the pair of waist portions has any one of the following: an overlapping portion in which a pair of sheets and a sheet different from the pair of sheets are arranged to overlap in the thickness direction; a folded back portion in which at least any one of the pair of sheets is folded back toward the inner surface of the waist portion, and a first stretchable member is arranged in any one of the overlapping portion and the folded back portion.

[0052] According to the above absorbent article, since the amount of the overlapped material is large in the overlapped portion and the folded back portion, the rigidity can be ensured compared with the case where only a pair of sheets and are provided. In addition, providing the non-fixed portion of the first stretchable member in such a portion having high rigidity makes it possible to suppress the diaper itself from wrinkling, compared with the non-fixed portion provided in the portion consisting of only a pair of sheets.

[0053] In such an absorbent article, it is desirable that the non-fixed portion is arranged asymmetrically with respect to a center line passing through the center in the width direction of the absorbent body.

[0054] According to the above absorbent article, since the first stretchable member has the non-fixed portion, the area of ​​the portion having high rigidity in the waist portion is reduced, and flexibility can be improved.

[0055] In such an absorbent article, it is desirable that the non-fixed portion straddles the end portion of the absorbent core in the width direction.

[0056] According to the above absorbent article, when the stretchable member (first stretchable member) having a non-fixed portion and the stretchable member (second stretchable member) having a fixed portion are stretched and compared, the non-fixed portion of the stretchable member that is not fixed will be stretched more preferentially. Therefore, when wearing the absorbent article, the non-fixed portion first fits one side of the wearer. The non-fixed portion overlaps with the end of the absorbent core, which makes the side portion of the absorbent core first contact and fit with the wearer's body, making it easier to closely contact with the wearer. Therefore, this reduces the risk of leakage from the end portion of the absorbent core. First embodiment

[0057] Below, will take the underwear-shaped disposable diaper for baby as example, describe one embodiment of absorbent article according to the present invention.However, the absorbent article according to the present invention is not limited thereto, and can be applied to underwear-shaped disposable diapers for adults, adult disposable diapers with tape, sanitary pants, etc.

[0058] Structure of the underpants-like disposable diaper 1

[0059] Figure 1 1 is a schematic perspective view of a pant-like disposable diaper 1 (hereinafter also referred to as “diaper 1”) according to a first embodiment. Figure 2 is a schematic plan view of the diaper 1 in the unfolded and stretched state. Figure 3 is along Figure 2Schematic cross-sectional view taken along line II in the middle. The "expanded state" in the diaper 1 refers to a state in which the diaper 1 is expanded in the longitudinal direction by untying the connecting portion 40 described later and separating the pair of waist portions 20 and 30 (described later). In addition, the "stretched state" of the diaper 1 refers to a state in which the diaper 1 is stretched to have no wrinkles, and is a state in which the diaper is stretched until the size of the constituent members of the diaper 1 (for example, the waist portions 20 and 30, etc.) matches or is close to the size of these members themselves.

[0060] exist Figure 1 In the panty-like state shown, the diaper 1 has a width direction, a vertical direction, and a front-to-back direction, and forms a waist opening portion BH and a pair of leg opening portions LH. In the vertical direction, the waist side is defined as the upper side, and the crotch side is defined as the lower side. In the front-to-back direction, the side close to the wearer's abdomen is defined as the front side, and the side close to the wearer's back is defined as the rear side. In addition, as shown in FIG. Figure 3 As shown in FIG. 1 , the direction in which the components of the diaper 1 are stacked on each other is referred to as the thickness direction. In the thickness direction, the side in contact with the wearer is defined as the skin side, and the side not in contact with the wearer is defined as the non-skin side. Figure 2 In the unfolded state, the diaper 1 has a longitudinal direction and a width direction that intersect each other. The longitudinal direction is a direction extending in the vertical direction, and the width direction is Figure 1 The width direction is the same in the underwear-like state.

[0061] The diaper 1 includes a pair of waist portions 20 and 30 and an absorbent body 10. Of the pair of waist portions 20 and 30, the portion applied to the abdomen of the wearer is referred to as a front waist portion 20, and the portion applied to the back of the wearer is referred to as a rear waist portion 30.

[0062] Further, in Figure 2 In the unfolded state shown, the diaper 1 has a width direction and a longitudinal direction, an end portion of one longitudinal side (front side) of the absorbent body 10 is arranged at a center portion in the width direction of the front waist portion 20, and an end portion of the other longitudinal side (rear side) of the absorbent body 10 is arranged at a center portion in the width direction of the rear waist portion 30. In the diaper 1 in the unfolded state, the absorbent body 10 is folded once substantially at the center in the longitudinal direction, and both side portions in the width direction of each of the front waist portion 20 and the rear waist portion 30 are connected by a pair of connecting portions 40, thereby forming Figure 1 The diaper 1 is shown in the pant-like state. It should be noted that the longitudinal direction of the diaper 1 in the unfolded state coincides with the vertical direction of the diaper 1 in the pant-like state. Further, the connection method in the connection part 40 can be, for example, welding, connection with an adhesive, etc.

[0063] like Figure 3 As shown, the absorbent body 10 includes: an absorbent body 11; a liquid-permeable top sheet 12 arranged on the skin side relative to the absorbent body 11; a liquid-impermeable back sheet 13 arranged on the non-skin side relative to the absorbent body 11; and an outer sheet 14 arranged on the non-skin side relative to the back sheet 13.

[0064] like Figure 2 As shown, the absorbent body 11 includes: an absorbent core 11A for absorbing and retaining excretion liquid (such as urine); and a liquid-permeable core 11B covering the absorbent core 11A. For example, the absorbent core 11A can be obtained by molding liquid-absorbing fibers (such as pulp) containing superabsorbent polymers (SAP) into a predetermined shape. It should be noted that the absorbent core 11A does not necessarily have to be covered with the core 11B.

[0065] like Figure 3 As shown, the front waist portion 20 (rear waist portion 30) includes: a skin side sheet 21 (31) and a non-skin side sheet 22 (32) (a pair of sheets) made of flexible non-woven fabric or similar material; and a plurality of waist stretchable members 23 (33) (stretchable members) that stretch and shrink in the width direction and are 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 side by side at a certain distance in the vertical direction (longitudinal direction) between the skin side sheet 21 (31) and the non-skin side sheet 22 (32) and are fixed to be stretched in the width direction. Therefore, the front waist portion 20 and the rear waist portion 30 stretch and shrink in the width direction and fit around the waist of the wearer. Note that as the waist stretchable members 23 and 33, linear stretchable members (e.g., elastic ropes) and long stretchable sheets can be exemplified. In addition, the configuration of the waist parts 20 and 30 is not limited to the configuration shown in the drawings. For example, the following cases are acceptable: a configuration having a three-layer or more layer structure in which a different sheet is stacked on the above pair of sheets; or a configuration in which the above pair of sheets is formed by folding one sheet.

[0066] Further, in the present embodiment, as an example of a panty-like disposable diaper, a so-called three-piece diaper is provided, which has three components, namely, a front waist portion 20, a rear waist portion 30, and an absorbent body 10; the front waist portion 20 and the rear waist portion 30 are separated. However, the present invention is not limited thereto. For example, the following diaper may be adopted: a so-called two-piece panty-like disposable diaper, which has two components, namely, an outer component and an absorbent body; the outer component is a component in which the front waist portion 20 and the rear waist portion 30 are integrated with each other, and the front waist portion 20 and the rear waist portion 30 form a continuous single component through the crotch portion.

[0067] Waist section 20 and 30

[0068] Figure 4 2 is a schematic plan view of the front waist portion 20 according to the first embodiment. Below, the configuration of the pair of waist portions 20 and 30 will be described by taking the front waist portion 20 as an example. However, it is sufficient that at least one of the pair of waist portions 20 and 30 has the following configuration. That is, both waist portions 20 and 30 may have the following configuration. Alternatively, only the rear waist portion 30 may have the following configuration, while the front waist portion 20 has a different configuration. Alternatively, only the front waist portion 20 may have the following configuration, while the rear waist portion 30 has a different configuration. The same applies to other embodiments.

[0069] The plurality of stretchable members 23 included in the front waist portion 20 (hereinafter also referred to as the waist portion 20) include: a plurality of "continuous stretchable members 231 (stretchable members of the present invention)" continuously arranged from one end portion to the other end portion of the waist portion 20 in the width direction; and a plurality of "non-continuous stretchable members 232" discontinuously arranged in the width direction. The non-continuous stretchable members 232 are arranged below the continuous stretchable members 231.

[0070] The continuous stretchable members 231 each have a "pair of end fixing portions 50" in which both end portions in the width direction of the stretchable member are fixed to the skin side sheet 21 and the non-skin side sheet 22. Note that there is no particular limitation on the fixing method in the end fixing portions 50, and the following well-known methods can be cited: fixing with an adhesive applied to the continuous stretchable 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 fixing with a pair of welding portions that cross the continuous stretchable member 231.

[0071] In addition, Figure 4 In the embodiment, the pair of end fixing portions 50 are arranged on the inner side relative to the pair of connecting portions 40 in the width direction and are separated from the pair of connecting portions 40. However, the present invention is not limited thereto. The pair of connecting portions 40 may serve as a pair of end fixing portions. That is, the diaper 1 does not necessarily have Figure 4 The end fixing portion 50 is shown in FIG.

[0072] In addition, the plurality of continuous stretchable members 231 include at least one "first continuous stretchable member 231a" and at least one "second continuous stretchable member 231b".

[0073] Furthermore, the first continuous stretchable member 231a (the first stretchable member of the present invention) has a "non-fixed portion 51" which is not fixed to the pair of sheets 21 and 22 and is located on the inner side in the width direction relative to the end fixing portion 50. On the other hand, the second continuous stretchable member 231b (the second stretchable member of the present invention) has a "fixed portion 52" which is fixed to the pair of sheets 21 and 22 at least in a region overlapping with the non-fixed portion 51 with respect to the width direction. The fixed 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.

[0074] Note that the first continuous stretchable member 231a of the present embodiment has the non-fixed portion 51 in a partial area between the end fixing portions 50 and 50 in the width direction. Furthermore, it is sufficient as long as the fixed portion 52 of the second continuous stretchable member 231b is provided at least in the portion in the width direction where the non-fixed portion 51 is provided. In addition, it is acceptable that the fixed portion 52 is continuously arranged from the end fixing portion 50 located on one side in the width direction to the end fixing portion 50 located on the other side in the width direction while being arranged corresponding to the position where the non-fixed portion 51 is located.

[0075] In the diaper 1, in the portion (fixed 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 increases due to the curing of the adhesive or the like, compared with the portion (non-fixed 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 portion having high rigidity can be reduced compared with, for example, the case where the non-fixed portion 51 is not provided (the case where the waist stretchable member 23 is fixed to the pair of sheets 21 and 22 in almost the entire area). This can enhance the flexibility of the waist portion 20, so that the wearing feeling of the waist portion 20 can be improved.

[0076] As described above, in the case where the waist stretchable member 23 has a portion (non-fixed portion 51) that is not fixed to the pair of sheets 21 and 22, the flexibility of the waist portion 20 can be enhanced. However, in the case where the entire area between the pair of end fixing portions 50 and 50 is formed by the non-fixed portion 51, positional deviation of the first continuous stretchable member 231a is more likely to occur when the diaper is worn, resulting in a risk of wrinkles occurring in the pair of sheets 21 and 22. In addition, in the case where the length of the non-fixed portion 51 in the width direction is longer than the length of the absorbent body 10, an area of ​​the absorbent body 10 is not directly connected to the waist stretchable member 23 (first continuous stretchable member 231a), which results in a risk of positional deviation of the absorbent body 10 in the vertical direction when the diaper is worn.

[0077] Then, in the present embodiment, the length L51 of the non-fixed portion 51 in the width direction (the total length in the width direction of the non-fixed portion 51 provided for a certain first continuous stretchable member 231a) is shorter than the length (width) W10 in the width direction of the absorbent body 10. Note that regarding the position where the non-fixed portion 51 is provided in the first continuous stretchable member 231a, it is not limited to a configuration in which the non-fixed portion 51 is provided so that at least a portion of the non-fixed portion 51 overlaps with the absorbent body 10 with respect to the width direction, such as Figure 4 The non-fixed portion 51 may be arranged so that the entire non-fixed portion 51 overlaps the absorbent body 10 with respect to the width direction. The length of the non-fixed portion 51 in the width direction is made shorter than the length (width) in the width direction of the absorbent body 10, so that the displacement of the absorbent body 10 in the vertical direction can be suppressed while enhancing the flexibility of the waist portion 20.

[0078] 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 vertical direction when the diaper 1 is put on. That is, there is a risk that the first continuous stretchable member 231a is positionally shifted in the vertical direction relative to the waist portion 20. Furthermore, when the positional shift of the first continuous stretchable member 231a in the vertical direction occurs in the waist portion 20 when the diaper 1 is put on, there is a risk that wrinkles occur in the sheets 21 and 22 constituting the waist portion 20, or there is a risk that tightening in the waist of the wearer becomes uneven to deteriorate the fit of the waist portion 20.

[0079] In contrast, in the present embodiment, in the width direction, the fixed portion 52 is provided in the region overlapping with the region in which the non-fixed portion 51 is provided, and thus the vertical movement of the first continuous stretchable member 231a (non-fixed portion 51) is restricted by the second continuous stretchable member 231b (fixed portion 52). This can suppress the occurrence of wrinkles in the waist portion 20 and the deterioration of the fit. That is, in the diaper 1, the provision of the non-fixed portion 51 can improve the flexibility of the waist portion 20, while the provision of the fixed portion 52 at a predetermined position can effectively suppress the occurrence of wrinkles or the like in the waist portion 20.

[0080] Furthermore, the arrangement of the non-fixed portion 51 in the waist portion 20 is not limited to Figure 4In the arrangement shown, a plurality of non-fixed portions 51 may be provided in one first continuous stretchable member 231a. Providing a large number of non-fixed portions 51 reduces the area of ​​the portion having high rigidity, so that the flexibility can be further improved. Providing fixed portions 52 in the regions respectively overlapping with the non-fixed portions 51 with respect to the width direction can prevent the position of the first continuous stretchable member 231a in each non-fixed portion 51 from being offset in the vertical direction.

[0081] Note that the first continuous stretchable member 231a also has a fixing portion 52 fixed to a pair of sheets 21 and 22 in the region between the end fixing portions 50 and 50 located on both sides in the width direction. That is, in the region between the pair of end fixing portions 50 and 50, the portion of the first continuous stretchable member 231a that does not belong to the non-fixing portion 51 is provided with the fixing portion 52. In the first continuous stretchable member 231a, the region where the non-fixing portion 51 is provided is a free portion that is not fixed to the sheets 21 and 22, so the first continuous stretchable member 231a can move in the vertical direction. However, the presence of the fixing portion 52 makes it possible to suppress the movement of the first continuous stretchable member 231a in the vertical direction. That is, the amount of movement (amplitude) of the first continuous stretchable member 231a in the vertical direction is reduced. Therefore, the positional deviation of the waist stretchable member 23 in the vertical direction is suppressed, which can make it easier to suppress the wrinkles and deterioration of fit that occur in the waist portion 20.

[0082] Furthermore, it is preferred that the second continuous stretchable member 231b also has a non-fixed portion 51, wherein the second continuous stretchable member 231b is not fixed to the pair of sheets 21 and 22. Increasing the number of the non-fixed portions 51 makes it possible to reduce the area of ​​the portion having high rigidity, and to enhance the flexibility of the waist portion 20. Furthermore, it is desirable that the length in the width direction of the non-fixed portion 51 of the second continuous stretchable member 231b (the sum of the lengths in the width direction of the non-fixed portions 51 provided for a certain second continuous stretchable member 231b) is shorter than the length (width) W10 in the width direction of the absorbent body 10. Therefore, it is possible to suppress the displacement of the absorbent body 10 in the vertical direction, while enhancing the flexibility of the waist portion 20 and reducing the deterioration of the fit.

[0083] Furthermore, in the diaper 1, the first continuous stretchable member 231a and the second continuous stretchable member 231b are alternately arranged side by side in the vertical direction (longitudinal direction). In other words, the diaper 1 has a portion in which the first continuous stretchable member 231a is arranged between two adjacent second continuous stretchable members 231b and 231b in the vertical direction, and such a portion is repeatedly arranged in the longitudinal direction. By the above configuration, as described above, the position of the non-fixed portion 51 of the first continuous stretchable member 231a is less prone to a large degree of displacement in the vertical direction. This makes it possible to more effectively suppress the occurrence of wrinkles in the waist portion 20 due to the positional displacement of the continuous stretchable member 231 and the decrease in the fit of the waist portion 20. Furthermore, the fixed portion 52 and the non-fixed portion 51 are alternately arranged side by side in the vertical direction, so that during the wearing of the diaper 1, when the waist portion 20 shrinks in the width direction, neat wrinkles are easily formed on the surface of the waist portion 20. That is, the uniformly shaped folds that are regularly positioned side by side can improve the aesthetic impression of the diaper 1 .

[0084] Furthermore, as in the present embodiment, the first continuous stretchable member 231a and the second continuous stretchable member 231b are preferably disposed above the absorbent core 11A in the vertical direction. Since the absorbent core 11A is formed of liquid-absorbent fibers, its rigidity is high compared to the waist portion 20, etc. Accordingly, the non-fixed portion 51 and the fixed portion 52 are disposed in a region excluding a high-rigidity portion like the absorbent core 11A, which makes it easier to achieve uniform fitting characteristics.

[0085] In addition, if Figure 4 As shown, the first continuous stretchable member 231a is also provided in the upper end portion in the vertical direction of the waist portion 20. The non-fixed portion 51 of the first continuous stretchable member 231a is provided in the upper end portion of the waist portion 20, and the number of portions having high rigidity in the upper end portion of the waist portion 20 is reduced, so that the flexibility of the upper end portion can be improved.

[0086] Furthermore, the non-continuous stretchable member 232 also preferably has an end fixing portion 55 and a non-fixing portion 56. The end fixing portion 55 is a portion where both end portions in the width direction of each continuous portion of each non-continuous stretchable member 232 are fixed to the pair of sheets 21 and 22. The non-fixing portion 56 is a portion located between the end fixing portions 55 where the non-continuous stretchable member 232 is not fixed to the pair of sheets 21 and 22. Specifically, as Figure 4As shown, a pair of end fixing parts 55 and 55 are arranged in the end part of one side in the width direction of the waist part 20 and the end part of one side in the width direction of the absorbent core 11A, and the non-fixed part 56 is arranged therebetween. Similarly, a pair of end fixing parts 55 and 55 are arranged in the end part of the other side in the width direction of the absorbent core 11A and the end part of the other side in the width direction of the waist part 20, and the non-fixed part 56 is arranged therebetween.

[0087] Since the non-continuous stretchable member 232 also has the non-fixed portion 56 described above, the flexibility of the waist portion 20 is enhanced. However, the present invention is not limited thereto. The non-continuous stretchable member 232 does not necessarily have to have the non-fixed portion 56. In addition, a portion of the non-continuous stretchable member 232 may be fixed in the region between the pair of end fixing portions 55 and 55. In this case, when the diaper 1 is put on, the waist portion 20 is more likely to fit the region between the pair of end fixing portions 55 and 55, making it easy to suppress the waist portion 20 from rising from the wearer's skin. In addition, regarding the region between the pair of end fixing portions 55 and 55, the following configuration is also acceptable: among the plurality of non-continuous stretchable members 232, 232, ... arranged side by side in the vertical direction, members having a fixed portion in the region and members having no fixed portion in the region are alternately arranged. In this case, flexibility and fit in the region can be achieved.

[0088] In addition, if Figure 2 and Figure 3 As shown in FIG. 1 , in the rear waist portion 30 of the diaper 1, a post-processing tape 70 is provided. The post-processing tape 70 is a substantially rectangular tape-shaped member (tape member) which is elongated in the vertical direction. The post-processing tape 70 has a tape fixing portion 71 (in the longitudinal direction) on one side thereof. Figure 2 The diaper 1 is shown with a shaded portion in the figure), and has an adhesive portion 72 on the other side in the vertical direction (longitudinal direction). The tape fixing portion 71 is formed by an adhesive or the like. The post-processing tape 70 is fixed to the non-skin side surface of the non-skin side sheet 32 ​​of the rear waist portion 30 in an undetachable manner by the tape fixing portion 71. An adhesive is applied to the adhesive portion 72. Before the diaper 1 is used, a portion of the post-processing tape 70 is folded into a state in which the adhesive portion 72 is located on the inside. Therefore, the adhesive portion 72 is not exposed to the outside, and the adhesive surface of the adhesive portion 72 is protected.

[0089] When the diaper 1 is discarded after use, the diaper 1 is rolled up in the length direction with the absorbent body 10 facing the inside, and the adhesive portion 72 is exposed by stretching and pulling the folded post-processing tape 70 relative to the diaper 1. Then, one side of the adhesive portion 72 is wrapped around the diaper 1. Therefore, the diaper 1 can be kept in the rolled-up state, so that the diaper 1 can be discarded without excrement or the like attached to the inside of the diaper 1 (absorbent body 10) leaking to the outside.

[0090] In the present embodiment, the post-processing tape 70 is arranged so that the tape fixing portion 71 overlaps with the fixing portion 52 of the second continuous stretchable member 231b (331b) 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 problem. That is, after the diaper 1 is used, when the post-processing tape 70 is pulled toward the non-skin side in the thickness direction, since only the non-skin side sheet 22 (32) in the waist portion 20 (rear waist portion 30) is pulled toward the non-skin side by the tape fixing portion 71, there is a possibility that the non-skin side sheet 22 (32) rises from the skin side sheet 21 (31). In this case, there is a risk that the non-skin side sheet 22 (32) is torn, or there is a risk that the force pulling the post-processing tape 70 is not easily transmitted to the waist portion 20 (rear waist portion 30).

[0091] In contrast, in the present embodiment, the tape fixing portion 71 and the fixing portion 52 overlap. Therefore, after the diaper 1 is used, when the post-processing tape 70 is pulled toward the non-skin side in the thickness direction, both the skin side sheet 21 (31) and the non-skin side sheet 22 (32) connected in the thickness direction by the fixing portion 52 are pulled. Therefore, this prevents the sheets 21 (31) and 22 (32) constituting the waist portion 20 from being torn, and prevents the problem that the force for pulling the post-processing tape 70 is not easily transmitted to the waist portion 20. This can facilitate post-processing of the diaper 1 after it has been used.

[0092] In addition, if Figure 4As shown, it is preferred that the non-fixed portion 51 of the first continuous stretchable member 231a crosses the end 11e of the absorbent core 11A in the width direction. When the first continuous stretchable member 231a having the non-fixed portion 51 and the second continuous stretchable member 231b having the fixed portion 52 are stretched and compared, the non-fixed portion 51 of the waist stretchable member 23 that is not fixed is stretched more preferentially. Therefore, when the diaper 1 is put on, part of the non-fixed portion 51 first fits the body of the wearer. In addition, the non-fixed portion 51 crosses the end 11e of the absorbent core 11A in the width direction, that is, overlaps with the end 11e of the absorbent core 11A in the width direction, so the side portion of the absorbent core 11A first contacts and fits the body of the wearer, which makes it easier to be in close contact with the wearer. Therefore, this makes it possible to reduce the risk of leakage from the end portion in the width direction of the absorbent core 11A.

[0093] Figure 5 2 is a schematic plan view of the front waist portion 20 for illustrating the overlapping fixing portion 53 in the first embodiment. Figure 5 As shown, the diaper 1 of the present embodiment has overlapping fixing portions 53, wherein the fixing portions 52 of the first continuous stretchable member 231a and the fixing portions 52 of the second continuous stretchable member 231b overlap in the width direction. Furthermore, in the present embodiment, a plurality of overlapping fixing portions 53 (53a to 53f) are arranged side by side in the vertical direction, and each overlapping fixing portion 53 spans the center WCL in the width direction of the absorbent body 10. The center portion in the width direction of the absorbent body 10 is a portion that contacts the center of the wearer's body, and when the diaper is worn, there is a risk that the position of the absorbent body 10 is shifted in the vertical direction (longitudinal direction) due to the movement of the body.

[0094] In this regard, as in the present embodiment, the movement of the absorbent body 10 is restricted by providing an overlapping fixing portion 53 across the center WCL in the width direction in which the fixing portion 52 overlaps in the width direction. This makes it possible to suppress a situation in which the position of the absorbent body 10 in the vertical direction is easily shifted. However, the overlapping fixing portion 53 is not limited to a configuration in which the overlapping fixing portion crosses the center WCL in the width direction of the absorbent body 10. It is sufficient as long as the overlapping fixing portion 53 is arranged so that the absorbent body 10 is not easily shifted in the vertical direction while having a portion overlapping with the absorbent body 10 in the width direction.

[0095] In addition, in the present embodiment, among the plurality of overlapping fixing portions 53 (53a to 53f), the overlapping fixing portions 53a to 53d are disposed on the outer side in the longitudinal direction with respect to the absorbent main body 10. As in the present embodiment, the overlapping fixing portions 53 (53a to 53d) are arranged on the outer side of the absorbent main body 10 in the longitudinal direction (vertical direction), so that upward displacement of the absorbent main body 10 in the vertical direction can be suppressed. Note that in Figure 5 , on the outer side of the absorbent main body 10 in the longitudinal direction (vertical direction), the overlapping fixing portions 53a to 53d are spaced apart from each other in the longitudinal direction, but it is sufficient that at least a pair of overlapping fixing portions 53 are arranged.

[0096] In addition, among the plurality of overlapping fixing portions 53 (53a to 53f), the overlapping fixing portions 53e and 53f overlap with the absorbent main body 10 when viewed in the thickness direction. By arranging the overlapping fixing portions 53 to overlap with the absorbent main body 10 when viewed in the thickness direction, a part of the absorbent main body 10 can be effectively pressed so as not to shift, enhancing the fitting property of the diaper 1. Note that when viewed in the thickness direction, it is not necessary for all of the overlapping fixing portions 53d and 53e to overlap with the absorbent main body 10, as long as the overlapping fixing portions 53d and 53e have portions overlapping with the absorbent main body.

[0097] In addition, the length L53 in the width direction of the overlapping fixing portion 53 is longer than the length L50 of the end fixing portion 50. By providing the overlapping fixing portion 53 having a length L53 longer than the length L50 of the end fixing portion 50 (L53 > L50) located on both sides in the width direction, compared with the case of providing the overlapping fixing portion 53 having a length L53 shorter than the length L50 of the end fixing portion 50 (L53 < L50), displacement of the waist stretchable member 23 in the vertical direction can be suppressed. This makes it possible to reduce deterioration of the fitting property of the waist portion 20 (30).

[0098] In addition, as Figure 5As shown, in the first embodiment, the first continuous stretchable member 231a and the second continuous stretchable member 231b are arranged adjacent to each other in the longitudinal direction. The length L53 in the width direction of the overlapping fixing portion 53 is made longer than the length LB23 in the longitudinal direction between the first continuous stretchable member 231a and the second continuous stretchable member 231b. By setting the overlapping fixing portion 53 so that the length L53 in the width direction of the overlapping fixing portion 53 is longer than the length (space) LB23 in the longitudinal direction between the first continuous stretchable member 231a and the second continuous stretchable member 231b, compared with the case where the overlapping fixing portion 53 is set so that the length L53 in the width direction is shorter than the length (space) LB23 in the longitudinal direction, the positional deviation of the first continuous stretchable member 231a and the second continuous stretchable member 231b in the vertical direction can be suppressed, and the deterioration of the fit of the waist portion 20 (30) can be reduced.

[0099] Modify the example

[0100] Figure 6 : is a schematic plan view of the front waist portion 20 of the diaper 1 in a modified example. In this modified example, the non-continuous stretchable member 232 does not have the non-fixed portion 56, but has a fixed portion 55' in which the non-continuous stretchable member 232 is completely fixed to the pair of sheets 21 and 22. According to the above-mentioned configuration, when the diaper 1 is put on, the waist portion 20 is more likely to fit the body, making it easy to suppress the waist portion 20 from rising from the wearer's skin, etc.

[0101] Furthermore, in the present modified example, in the waist portion 20 (30) of the diaper 1, the region located outside the two end portions 10es and 10es in the width direction of the absorbent body 10 (the two outsides in the width direction) is referred to as the side region SD (the region surrounded by the thick dotted line and located in the two side portions in the width direction). Further, the region located outside the upper end 10eu in the longitudinal direction of the absorbent body 10 (the two outsides in its longitudinal direction) and overlapping the absorbent body 10 with respect to the width direction is referred to as the upper region PD (the region surrounded by the thick dotted line and indicated by the dotted line pattern). The value obtained by dividing the total length of the fixing portions 52 and 55' in the side region SD by the total length of the plurality of waist stretchable members 23 (the stretchable member of the present invention) in the side region SD is greater than the value obtained by dividing the total length of the fixing portions 52 in the upper region PD by the total length of the plurality of waist stretchable members 23 (the stretchable member of the present invention) in the upper region PD. Specifically, in each side region SD, the first continuous stretchable member 231a1 is located at the upper end in the vertical direction, and the second continuous stretchable member 231b1, the first continuous stretchable member 231a2, the second continuous stretchable member 231b2, the first continuous stretchable member 231a3 and the second continuous stretchable member 231b3 are arranged side by side downward from the position of the stretchable member 231a1 in this order in the vertical direction and with a space in between in the vertical direction. Further ten non-continuous stretchable members 232 are arranged on the lower side. The total length of the plurality of waist stretchable members 23 in the side region SD is the total length of the portions of the following stretchable members located in the side region SD: the first continuous stretchable members 231a1 to 231a3; the second continuous stretchable members 231b1 to 231b3; and the non-continuous stretchable member 232. The total length of the fixed portions 52 and 55' in the side region SD is, for example, Figure 6In the side region SD on one side in the width direction of the waist, the total length of the portion in the side region SD is: the fixing portion 52 of the second continuous stretchable members 231b1 to 231b3; the fixing portion 52 of the first continuous stretchable members 231a2 and 231a3; and the fixing portion 55' of the non-continuous stretchable member 232. Similarly, in the upper region PD, there are the first continuous stretchable members 231a, 231a2 and the second continuous stretchable members 231b1, 231b2. The total length of the portion of the stretchable members 231a1, 231a2, 231b1 and 231b2 in the upper region PD is the total length of the plurality of waist stretchable members 23 in the upper region PD. The total length of the portion of the fixing portion 52 of the first continuous stretchable member 231a2 and the second continuous stretchable members 231b1 and 231b2 in the upper region PD is defined as the total length of the fixing portion 52 in the upper region PD. That is, the numerical value in the side region SD is larger, so the area ratio occupied by the fixed portion 52 (55') in the side region SD is larger than the area ratio occupied in the upper region PD. Therefore, providing a large number of fixed portions 52 and 55' in the side region SD reliably suppresses the phenomenon that the non-fixed portion 51 deviates in the vertical direction (longitudinal direction) and causes the diaper 1 to wrinkle, and makes the non-fixed portion fit the wearer's body. In addition, by providing a smaller number of fixed portions 52 in the upper region PD, which is a portion that is easy to contact the wearer's skin, compared with the side region SD, flexibility can be ensured. Second embodiment

[0102] Figure 7 2 is a schematic plan view of the front waist portion 20 according to the second embodiment. In the second embodiment, all the plurality of waist stretchable members 23 included in the front waist portion 20 are a plurality of continuous stretchable members 231 (stretchable members of the present invention) arranged continuously from one end portion to the other end portion of the waist portion 20 in the width direction. The first continuous stretchable members 231a and the second continuous stretchable members 231b are arranged alternately in the longitudinal direction. In addition, in each second continuous stretchable member 231b, the fixing portion 52 is arranged continuously from one side end fixing portion 50 to the other side end fixing portion 50 in the width direction. That is, in the present embodiment, the second continuous stretchable member 231b is fixed by the fixing portion 52 over a large range in the width direction. Therefore, even if the non-fixed portion 51 of the first continuous stretchable member 231a attempts to move in the vertical direction, the movement is restricted by the fixing portion 52 of the second continuous stretchable member 231b, making it easier to suppress the occurrence of a large positional deviation.

[0103] In addition, absorbent core 11A has a part in which the length (width) on the width direction toward the center part in the longitudinal direction of absorbent core 11A is narrowed inwardly, specifically, has a minimum portion M1 where the length on the width direction of absorbent core 11A becomes minimum. In the width direction, the length of non-fixed part 51 is shorter than the length of the minimum portion M1 of absorbent core 11A and is longer than half of the length of the minimum portion M1. Non-fixed part 51 is set in waist portion 20, the area of ​​the part with high rigidity in waist portion 20 is reduced, and flexibility is enhanced, and texture is improved. However, if the length of non-fixed part 51 is too long, there is a risk of wrinkling. Therefore, by making the length of non-fixed part 51 shorter than the minimum portion M1 of absorbent core 11A and longer than half of the length of minimum portion M1, it is easy to achieve the balance between the flexibility of waist portion 20 and preventing wrinkling.

[0104] Note that in the present embodiment, the non-fixed portion 51 is not limited to having a length in the width direction shorter than the minimum portion M1 of the absorbent core 11A and longer than half the length of the minimum portion M1 as described above. Preferably, the length in the width direction of the non-fixed portion 51 is at least shorter than the length (width) in the width direction of the end portion 11Aeu in the longitudinal direction of the absorbent core 11A, and more preferably, equal to or less than the length of the minimum portion M1 of the absorbent core 11A. By such a configuration, similarly, a balance between the flexibility of the waist portion 20 and the prevention of wrinkles can be easily achieved.

[0105] Furthermore, in the present embodiment, the non-fixed portion 51 of the first continuous stretchable member 231a crosses the center WCL in the width direction of the absorbent body 10. In this case, the flexibility of the center portion in the width direction is enhanced. On the other hand, in the center portion in the width direction, the amount of movement (amplitude) of the first continuous stretchable member 231a in the vertical direction may become larger. However, the second continuous stretchable member 231b is arranged adjacent to the first continuous stretchable member 231a in the longitudinal direction, and the second continuous stretchable member 231b has a fixing portion 52 in the entire region extending between a pair of end fixing portions 50 in the width direction. This suppresses the movement of the first continuous stretchable member 231a in the vertical direction, so that the occurrence of wrinkles of the diaper 1 can be prevented. It should be noted that it is sufficient as long as the second continuous stretchable member 231b is arranged adjacent to the first continuous stretchable member 231a on at least one side in the longitudinal direction. Since the second continuous stretchable member 231b is arranged directly below or directly above the first continuous stretchable member 231a having the non-fixed portion 51 and has the fixed portion 52 extending from one end to the other end in the width direction, the occurrence of wrinkles in the waist portion 20 can be suppressed.

[0106] In addition, as described above, since the length of the non-fixed portion 51 in the width direction is shorter than the length of the minimum portion M1 of the absorbent core 11A, the positional deviation of the first continuous stretchable member 231a is suppressed while the flexibility is improved. In addition, since the second continuous stretchable member 231b positioned to overlap with the non-fixed portion 51 in the width direction has the fixed portion 52 in the entire area extending between the pair of end fixing portions 50, the vertical movement of the first continuous stretchable member 231a can be further suppressed, so that the deterioration of the fit due to the occurrence of wrinkles can be reduced.

[0107] In addition, in the first continuous stretchable member 231a of the present embodiment, the fixed portion 52 extending to the end fixed portion 50 is provided on the outside of the two side portions in the width direction of the non-fixed portion 51. In the portion where the non-fixed portion 51 is provided, the first continuous stretchable member 231a is easy to move, making it easy to cause wrinkles. However, the fixed portion 52 extending to the end fixed portion 50 is provided on the two side portions of the non-fixed portion 51, that is, the stretchable member is fixed to the end portion in the width direction, which can make the first continuous stretchable member 231a not easy to deviate. Please note that the fixed portion 52 is not necessarily provided on the two side portions in the width direction of the non-fixed portion 51 of the first continuous stretchable member 231a. It is desirable that the fixed portion 52 extending to the end fixed portion 50 is provided on at least one of the two side portions outside the non-fixed portion 51 in the width direction.

[0108] Further, in the diaper 1, among the plurality of waist stretchable members 23 arranged in at least one of the pair of waist portions 20 and 30, the number of first continuous stretchable members 231a (the number of elastic strings) is smaller than the number of second continuous stretchable members 231b (the number of elastic strings). Figure 7 In the embodiment of the present invention, five first continuous stretchable members 231a and six second continuous stretchable members 231b are provided in the waist portion 20. The more the number of the second continuous stretchable members 231b, the more the number of the fixed parts 52. This makes it easier to securely fix the second continuous stretchable member 231b to a pair of sheets 21 and 22. That is, by setting the number of the fixed parts 52 to be greater than the number of the non-fixed parts 51, the proportion of the part in the waist portion 20 where the second continuous stretchable member 231b is fixed is increased, so that the positional deviation of the second continuous stretchable member 231b becomes less likely to occur. In addition, fixing the position of the second continuous stretchable member 231b makes it easier to limit the movement of the first continuous stretchable member 231a in the vertical direction, as described above. That is, the positional deviation of the waist stretchable member 23 can be completely suppressed. Accordingly, this further suppresses the occurrence of wrinkles in the waist portion 20 or the deterioration of the fit.

[0109] However, in the diaper 1, among the plurality of continuous stretchable members 231 arranged in the waist portion 20, the number of the first continuous stretchable members 231a (the number of elastic strings) may be equal to or greater than the number of the second continuous stretchable members 231b (the number of elastic strings). The greater the number of the first continuous stretchable members 231a, the greater the number of the non-fixed portions 51. This makes it possible to reduce the area of ​​the portion having high rigidity. That is, setting the number of the non-fixed portions 51 to be greater than the number of the fixed portions 52 reduces the ratio of the region having high rigidity in the waist portion 20, making it possible to further increase the flexibility of the waist portion 20. For example, in the case where the wearer of the diaper 1 is an infant or an elderly person with fragile skin, enhancing the flexibility of the waist portion 20 makes it possible to suppress discomfort. Therefore, this configuration is effective.

[0110] Modify the example

[0111] Figure 8 : is a schematic plan view of the front waist portion 20 in another modified example. In this modified example, as in the second embodiment, the plurality of waist stretchable members 23 included in the waist portion 20 are a plurality of continuous stretchable members 231 arranged continuously from one end portion to the other end portion of the waist portion 20 in the width direction, but the arrangement of the fixed portion 52 and the non-fixed portion 51 is different from that in the above-mentioned embodiment. Specifically, the non-fixed portion 51 is arranged asymmetrically with respect to the center line (WCL) passing through the center in the width direction of the absorbent body 10. Even in the case where the non-fixed portion 51 is arranged asymmetrically with respect to the center in the width direction of the absorbent body 10, the presence of the non-fixed portion 51 itself reduces the area of ​​the portion having high rigidity in the waist portion 20, so that the flexibility can be improved. Third embodiment

[0112] Fig. 9 20 according to the third embodiment. In the third embodiment, the waist portion 20 has a sheet connecting portion 60 (in the inner side of the end fixing portion 50) in the width direction. Fig. 9 Each sheet connection portion 60 is a portion where a pair of sheets 21 and 22 are connected to each other. Note that as a method of connecting a pair of sheets 21 and 22 in the sheet connection portion 60, welding, connection with an adhesive, or the like can be exemplified.

[0113] In the non-fixed parts 51 and 56 of the waist stretchable member 23, the pair of sheets 21 and 22 are not connected to each other, so 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 likely to be visually recognized in a raised state in the external appearance of the diaper 1. In addition, the contraction of the waist stretchable member 23 is more likely to form large irregular longitudinal wrinkles. In contrast, in the third embodiment, the provision of the sheet connecting part 60 in the waist part 20 suppresses the rise of the non-skin side sheet 22, so that the external appearance of the diaper 1 can be improved.

[0114] Fig. 9 The sheet connecting portions 60 shown in the figure extend longer in the width direction of the diaper 1 than in the vertical direction (longitudinal direction). In addition, the sheet connecting portions 60 are respectively discontinuous with the portions of the waist stretchable member 23 fixed to the pair of sheets 21 and 22 inside the end fixing portions 50 in the width direction (for example, the fixing portion 52 of the second continuous stretchable member 231b), and the sheet connecting portions 60 are arranged to be spaced apart in the vertical direction. That is, the sheet connecting portions 60 are arranged so as not to intersect with the waist stretchable member 23. Specifically, Fig. 9 The illustrated sheet connecting portions 60 extend continuously from one end edge to the other end edge of the waist portion 20, and are respectively arranged in all gaps between the waist stretchable members 23 arranged side by side in the vertical direction.

[0115] As described above, the sheet connecting portion 60 which is long in the width direction is provided in the waist portion 20, so that regular long gathers are more easily formed when the waist stretchable member 23 is contracted. Therefore, the external appearance of the diaper 1 is improved, so that the user can be impressed with the good fit of the waist portion 20.

[0116] In addition, as described above, the sheet connecting portion 60 extends continuously from one end edge of the waist portion 20 to the other end edge, respectively, that is, the sheet connecting portion 60 is arranged to overlap with the non-fixed portions 51 and 56 in the width direction. Since the sheet connecting portion 60 is arranged to overlap with the non-fixed portions 51 and 56 in the width direction, the waist stretchable member 23 is prevented from being easily offset in the vertical direction (longitudinal direction) due to the non-fixed portions 51 and 56 not being fixed to the pair of sheets 21 and 22. In addition, when the diaper 1 is put on, the rise of the waist portion 20 from the wearer's skin can be suppressed in the area where the non-fixed portions 51 and 56 exist. In addition, since the area of ​​the portion of the waist stretchable member 23 of the waist portion 20 fixed to the pair of sheets 21 and 22 is not increased (the number of fixed portions 52 is not increased), the flexibility of the waist portion 20 can be maintained.

[0117] Note that, in the case where the waist portion 20 has the sheet connecting portion 60, there is a risk that the flexibility of the waist portion 20 is reduced compared to the case where the waist portion 20 does not have the sheet connecting portion 60. However, the sheet connecting portion 60 is less likely to come into close contact with the wearer's skin than the waist stretchable member 23. Therefore, the user is less likely to feel the hardness of the adhesive or the like of the sheet connecting portion 60 than the hardness of the adhesive or the like that fixes the waist stretchable member 23 to the pair of sheets 21 and 22, so that deterioration of the wearing feeling of the waist portion 20 can be suppressed.

[0118] In addition, the sheet connecting portion 60 of the third embodiment is not limited to Fig. 9 The sheet shape shown. For example, the following construction is acceptable: the sheet connecting portion 60 is arranged intermittently in the width direction, and does not extend continuously in the width direction. In addition, the sheet connecting portion 60 may be arranged only in some of the multiple regions between the waist stretchable members 23 arranged side by side in the vertical direction. In addition, the sheet connecting portion 60 may be arranged on the inner side relative to the connecting portion 40 in the width direction, or may be arranged on the inner side relative to the end fixing portion 50 in the width direction. In addition, the sheet connecting portion 60 may be formed by a plurality of opening portions, which are formed by penetrating a pair of sheets 21 and 22 in the thickness direction. Specifically, the plurality of opening portions connect the sheets 21 and 22 to each other by welding the edge portions of the opening portions. Such a plurality of opening portions makes it possible to suppress the movement of the waist stretchable member 23 in the vertical direction while enhancing the breathability of the diaper 1. Other embodiments

[0119] Although the above embodiments of the present invention have been described, the above embodiments are for the purpose of facilitating the understanding of the present invention, rather than for the purpose of limiting the interpretation of the present invention. In addition, within the scope of the gist of the present invention, the present invention may be modified or improved, and it is needless to say that its equivalents are also included in the present invention.

[0120] The diaper 1 may have a graphic (not shown) that can be visually recognized from the non-skin side. For example, the graphic may be provided on the non-skin side surface of the back sheet 13 of the absorbent body 10, or may be provided on the non-skin side surface of a film or the like additionally provided between the back sheet 13 and the outer sheet 14. The graphic includes patterns, pictures, symbols, characters, etc., and is not particularly limited. In addition, it is preferred that there is a portion where the graphic and the non-fixed portion 51 of the first continuous stretchable member 231a overlap when viewed in the thickness direction. The shrinkage of the region provided with the graphic is suppressed by the non-fixed portion 51, and the aesthetic impression can be improved.

[0121] In the above-described embodiment, the front waist portion 20 and the back waist portion 30 include skin side sheets 21 and 31 and non-skin side sheets 22 and 32, respectively. Further, for the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32, a flexible sheet such as a non-woven fabric is used. The sheet member (non-woven fabric) constituting the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 may have the following configuration. For example, the sheet member (non-woven fabric) constituting the non-skin side sheets 22 and 32 may have a higher hydrophilicity than the sheet member (non-woven fabric) constituting the skin side sheets 21 and 31. That is, the skin side sheets 21 and 31 may be formed of a non-woven fabric having a low hydrophilicity, while the non-skin side sheets 22 and 32 may be formed of a non-woven fabric having a higher hydrophilicity than the skin side sheets 21 and 31.

[0122] Here, the nonwoven fabric constituting the skin side sheets 21 and 31 will be referred to as "hydrophobic nonwoven fabric", and the nonwoven fabric constituting the non-skin side sheets 22 and 32 will be referred to as "hydrophilic nonwoven fabric". In the waist portions 20 and 30, the hydrophilic nonwoven fabrics (22 and 32) will be stacked adjacent to the non-skin side of the hydrophobic nonwoven fabrics (21 and 31). Please note that it is not limited to the configuration in which the hydrophilic nonwoven fabric and the hydrophobic nonwoven fabric are arranged in the entire area of ​​the waist portions 20 and 30. It is sufficient that at least some areas have the above-mentioned configuration. By providing a hydrophilic nonwoven fabric (22 or 32) having high hydrophilicity on the non-skin surface side of the waist portion 20 or 30 of the diaper 1, moisture such as sweat is absorbed from the wearer's skin, allowing the absorbed moisture to be easily evaporated into the atmosphere. In addition, a difference in hydrophilicity (hydrophilic gradient) is generated between the hydrophobic nonwoven fabric and the hydrophilic nonwoven fabric, which makes it easy for moisture to move from the side of the skin side sheets 21 and 31 having low hydrophilicity to the side of the non-skin side sheets 22 and 32 having high hydrophilicity. Accordingly, it is not easy to retain moisture on the side in contact with the skin, while it is easy to retain moisture on the side not in contact with the wearer's skin.

[0123] However, since the hydrophilic nonwoven fabrics (22 and 32) easily contain moisture, there is a risk that the absorbed moisture returns to the skin side when the hydrophilic nonwoven fabrics are pressed toward the body by the waist stretchable members 23 and 33 of the waist portions 20 and 30. Therefore, in the diaper 1 of the present invention, it is desirable to have a portion where the hydrophilic nonwoven fabrics (22 and 32) overlap with the non-fixed portion 51 included in the plurality of waist stretchable members 23 and 33 (stretchable members) arranged between the skin side sheets 21 and 31 (hydrophobic nonwoven fabrics) and the non-skin side sheets 22 and 32 (hydrophilic nonwoven fabrics) when viewed in the thickness direction. By overlapping the non-fixed portion 51 and the hydrophilic nonwoven fabric, the compressive force on the body is reduced, so that the return of liquid from the hydrophilic nonwoven fabric side can be suppressed.

[0124] Note that the "hydrophilicity" of the above-mentioned sheet member can be evaluated by measuring the contact angle when ion exchange water contacts the surface of the sheet member. Specifically, when the contact angle between the hydrophilic nonwoven fabric and the ion exchange water is less than the contact angle between the hydrophobic nonwoven fabric and the ion exchange water, the hydrophilic nonwoven fabric has a higher hydrophilicity than the hydrophobic nonwoven fabric. For the hydrophilic nonwoven fabric (non-skin side sheet 32 ​​or the like) used in this embodiment, the contact angle with the ion exchange water is preferably less than 90°, more preferably 50° or less. On the other hand, for the hydrophobic nonwoven fabric (skin side sheet 31), the contact angle with the ion exchange water is preferably 90° or greater, more preferably 120° or greater. As an example of a hydrophilic nonwoven fabric, a nonwoven fabric can be cited that has increased hydrophilicity by undergoing a treatment (hydrophilic treatment) in which a predetermined oil agent is attached to the hydrophobic nonwoven fabric.

[0125] Further, in the diaper 1, in at least one of the pair of waist portions 20 and 30, a sheet (not shown) different from the pair of sheets 21 (31) and 22 (32) may be arranged to overlap with the pair of sheets 21 (31) and 22 (32) in the thickness direction. In the diaper 1, it is preferable that, when a portion in which a sheet different from the pair of sheets 21 (31) and 22 (32) is arranged to overlap with the pair of sheets 21 (31) and 22 (32) in the thickness direction is defined as an overlapping portion, the first continuous stretchable member 231a is arranged in the overlapping portion.

[0126] Further, the diaper 1 has a folded portion in which at least one of the pair of sheets 21 (31) and 22 (32) (in the above embodiment, the non-skin side sheets 22 and 32) is folded back onto the inner surface (skin side surface) of the waist portions 20 and 30 (see Figure 3 ). Similar to the above-mentioned overlapping portion, it is desirable that the first continuous stretchable member 231a is provided in the folded-back portion. Since the amount of overlapping materials is large in the overlapping portion and the folded-back portion, rigidity can be ensured compared to the case where only a pair of sheets 21 (31) and 22 (32) are provided. Furthermore, compared to the non-fixed portion 51 of the first continuous stretchable member 231a provided in the portion consisting of only a pair of sheets 21 (31) and 22 (32), providing the first continuous stretchable member 231a in the portion having high rigidity (i.e., providing the non-fixed portion 51) makes it possible to suppress the action of the force from the skin surface side and to limit the movement of the first continuous stretchable member 231a in the vertical direction in the non-fixed portion 51. Therefore, the decrease in fit due to wrinkling of the diaper 1 itself can be reduced.

[0127] Further, in the above-mentioned embodiment, the first continuous stretchable member 231a and the second continuous stretchable member 231b are alternately arranged side by side in the vertical direction (longitudinal direction). However, it is not limited to such a configuration, and a first elastic group in which several first continuous stretchable members 231a are combined together and a second elastic group in which several second continuous stretchable members 231b are combined together can also be provided. More specifically, it is desirable that one first elastic group (or one second elastic group) is composed of 2 to 5 first continuous stretchable members 231a (second continuous stretchable members 231b), and each first continuous stretchable member 231a (each second continuous stretchable member 231b) in one first elastic group (or one second elastic group) is arranged to have an interval of 2 to 8 mm. In addition, it is desirable that the width of one first elastic group (or second elastic group) is 15 mm or less. In this case, in the first elastic group, the number of parts with high rigidity is further reduced, so the flexibility can be further improved. Furthermore, the vertical movement of the non-fixed portion 51 is reliably suppressed by the second elastic group, so that the occurrence of wrinkles can be prevented and the deterioration of the fit can be reduced. Reference numerals list

[0128] 1: Disposable diapers in the form of underwear (absorbent articles)

[0129] 10: Absorbent body,

[0130] 11: absorbent body, 11A: absorbent core, 11B: core packing

[0131] 12: top sheet, 13: back sheet

[0132] 14: External piece

[0133] 20: front waist part (waist part), 30: back waist part (waist part)

[0134] 21, 31: Skin side film (film)

[0135] 22, 32: Non-skin side piece (piece)

[0136] 23, 33: Stretchable waist member

[0137] 231: Continuous Stretchable Member (Stretchable Member)

[0138] 232: Discontinuous tensile member

[0139] 231a: first continuous stretchable member (first stretchable member)

[0140] 231b, 331b: second continuous stretchable member (second stretchable member)

[0141] 231a1 to 231a3: First continuous stretchable member (first stretchable member)

[0142] 231 b1 to 231 b3: Second continuous stretchable member (second stretchable member)

[0143] 40: Connection part

[0144] 50, 55: End fixing part

[0145] 55': Fixed part

[0146] 51, 56: Non-fixed part

[0147] 52: Fixed part

[0148] 53: Overlapping fixed portion, 53a to 53f: Overlapping fixed portion

[0149] 60: Sheet connection part

[0150] 70: post-processing tape, 71: tape fixing part, 72: bonding part

[0151] PD: superior region, SD: lateral region

Claims

1. An absorbent article, wherein the absorbent article has a width direction, a longitudinal direction and a thickness direction in an unfolded state, and the absorbent article comprises: a pair of waist sections; as well as an absorbent body comprising an absorbent core, At least either of the pair of waist portions comprises: a pair of sheets; and a plurality of stretchable members which are arranged between the pair of sheets and stretch and contract in the width direction, Each of the plurality of stretchable members is arranged continuously from one end portion to the other end portion of either one of the pair of waist portions in the width direction, Each of the plurality of stretchable members has 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 include: at least one first stretchable member having a non-fixed portion that is not fixed to the pair of sheets and is located inside with respect to the end fixed portion in the width direction; and at least one second stretchable member having a fixed portion fixed to the pair of sheets at least in a region overlapping the non-fixed portion with respect to the width direction, The length of the non-fixed portion in the width direction is shorter than the length of the absorbent body in the width direction.

2. The absorbent article according to claim 1, wherein The absorbent core has a smallest portion in which the length of the absorbent core in the width direction is smallest, and The length of the non-fixed portion in the width direction is shorter than the length of the minimum portion in the width direction and longer than half the length of the minimum portion in the width direction.

3. The absorbent article according to claim 1 or 2, wherein: The pair of waist portions each have: Side regions respectively positioned on both outer sides in the width direction of the absorbent body; upper regions respectively positioned at both outer sides in the longitudinal direction of the absorbent body and at positions overlapping the absorbent body with respect to the width direction, and, A value obtained by dividing the total length of the fixing portion in the side region by the total length of the plurality of stretchable members in the side region is greater than a value obtained by dividing the total length of the fixing portion in the upper region by the total length of the plurality of stretchable members in the upper region.

4. The absorbent article according to any one of claims 1 to 3, wherein: The non-fixed portion of the first stretchable member spans the center in the width direction of the absorbent body, The second stretchable member is arranged adjacent to the first stretchable member on at least one side in the longitudinal direction, and The second stretchable member has a fixing portion over an entire region extending between a pair of end fixing portions in the width direction.

5. The absorbent article according to any one of claims 1 to 4, wherein: The absorbent core has a smallest portion in which the length in the width direction of the absorbent core is smallest, The length of the non-fixed portion in the width direction is shorter than the length of the smallest portion in the width direction. The non-fixed portion spans the center in the width direction of the absorbent body, and The fixing portion extending up to the end fixing portion is provided on at least one of both side portions outside the non-fixing portion in the width direction.

6. The absorbent article according to any one of claims 1 to 5, wherein: The absorbent core has a smallest portion in which the length in the width direction of the absorbent core is smallest, The length of the non-fixed portion in the width direction is shorter than the length of the smallest portion in the width direction, and The second stretchable member has a fixing portion over an entire region extending between the pair of end fixing portions in the width direction.

7. The absorbent article according to any one of claims 1 to 6, wherein: The second stretchable member has a fixing portion over the entire region extending between the pair of end fixing portions in the width direction, and The number of first stretchable members provided in at least any one of the pair of waist portions is smaller than the number of second stretchable members provided in the at least any one of the pair of waist portions.

8. The absorbent article according to any one of claims 1 to 7, wherein The first stretchable member has a fixed portion fixed to the pair of sheets, The absorbent article has an overlapping fixed portion in which the fixed portion of the first stretchable member and the fixed portion of the second stretchable member overlap with respect to the width direction, and The overlapping fixed portion is located outside the absorbent body in the longitudinal direction.

9. The absorbent article according to any one of claims 1 to 7, wherein: The first stretchable member has a fixed portion fixed to the pair of sheets, The absorbent article has an overlapping fixed portion in which the fixed portion of the first stretchable member and the fixed portion of the second stretchable member overlap with respect to the width direction, and The overlapping fixed portion has a portion overlapping the absorbent body in the thickness direction.

10. The absorbent article according to claim 8 or 9, wherein: The length in the width direction of the overlapping fixing portion is longer than the length of each end fixing portion.

11. The absorbent article according to any one of claims 1 to 10, wherein: a post-processing tape for holding the absorbent article in a state in which the absorbent article is rolled up when the absorbent article is discarded after use, The post-treatment tape has a tape fixing portion for fixing the post-treatment tape to the non-skin side of the waist portion, and The absorbent article has a portion where the tape fixing portion and the fixing portion overlap when viewed in the thickness direction.

12. The absorbent article according to any one of claims 1 to 11, wherein The absorbent article further includes a sheet connecting portion in which facing surfaces of a pair of sheets are connected to each other, and The sheet connecting portion is disposed so as to overlap the non-fixed portion with respect to the width direction.

13. The absorbent article according to any one of claims 1 to 12, wherein: The absorbent article further includes a graphic that is visually discernible from the non-skin side, and There is a portion where the pattern and the non-fixed portion overlap when viewed in the thickness direction.

14. The absorbent article according to any one of claims 1 to 13, wherein The waist portion has, at least in a partial area, a hydrophobic nonwoven fabric and a hydrophilic nonwoven fabric which is superposed adjacent to the non-skin side of the hydrophobic nonwoven fabric and has a higher hydrophilicity than that of the hydrophobic nonwoven fabric, and There is a portion where the non-fixed portion and the hydrophilic nonwoven fabric overlap when viewed in the thickness direction.

15. The absorbent article according to any one of claims 1 to 14, wherein At least one of the pair of waist portions has any one of the following: an overlapping portion in which a pair of sheets and a sheet different from the pair of sheets are arranged to overlap in a thickness direction; a folded back portion, wherein at least either one of the pair of sheets is folded back toward the inner surface of the waist portion, and The first stretchable member is provided in any one of the overlapping portion and the folded-back portion.

16. The absorbent article according to any one of claims 1 to 15, wherein: The non-fixed portion is arranged asymmetrically with respect to a center line passing through the center in the width direction of the absorbent body.

17. The absorbent article according to any one of claims 1 to 4 and 6 to 16, wherein The non-fixed portion spans across the ends of the absorbent core in the width direction.

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