JP7278819B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

As a stretchable structure for the waist portion of an absorbent article, there is an absorbent article having an elongated elastic stretchable member provided along the stretching direction between two sheet layers. For example, in Patent Document 1, both ends of an elastic stretchable member are fixed to two sheet layers, and between the fixed ends, the elastic stretchable member becomes a free portion that is not fixed to the two sheet layers. Further disclosed is an elastic structure having a sheet joint in the region between the fixed ends, in which two sheet layers are joined via a hot-melt adhesive. It is said that the two sheet layers form a wavy shape (folds) along each other due to the sheet joints that are continuous in the stretching direction, and the top of the folds gently bends, resulting in a soft touch.

Japanese Patent No. 6254625

In the absorbent article of Patent Document 1, since the elastic stretchable member is not fixed to the two sheet layers between the fixed end portions of both ends of the elastic stretchable member in the waist portion, when the absorbent article is worn, the waist circumference The relative position of the elastic stretchable member with respect to the portion may shift (for example, position shift in the vertical direction). In addition, due to such a positional deviation, the distance (interval) between the plurality of elastic members arranged in the vertical direction may become smaller. As a result, when the absorbent article is worn, there is a risk that the fit will deteriorate, or that the sheet that forms the waist portion will "sag". On the other hand, when the entire elastic stretchable member is fixed to the waist portion, it is possible to suppress the displacement of the elastic stretchable member. However, if the area of the portion where the two sheet layers are fixed by the elastic stretchable member increases, the flexibility of the waist portion may be impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to improve the flexibility of the waist portion of an absorbent article while preventing the waist portion from becoming loose. is to suppress

The main invention for achieving the above object is
In the unfolded state, having a width direction, a longitudinal direction, and a thickness direction,
An absorbent article having a pair of waist portions and an absorbent main body having an absorbent core,
At least one of the pair of waist portions has a pair of sheets and a plurality of stretchable members arranged between the pair of sheets and stretchable in the width direction,
Each of the stretchable members is arranged continuously from one end in the width direction to the other end of the one waist portion, and both ends in the width direction are fixed to the pair of sheets. having an end fixing part;
The plurality of elastic members have a first elastic member and a second elastic member adjacent to one side of the first elastic member in the longitudinal direction,
A non-fixed portion in which the first elastic member and the second elastic member are not fixed to the pair of sheets, and opposing surfaces of the pair of sheets in a region inside the fixed end portion in the width direction. a sheet joint where the sheet joints are joined together;
The sheet joint portion is arranged continuously in the longitudinal direction from at least one end of the second stretchable member to the other end of the first stretchable member in the longitudinal direction. ,
The absorbent article is characterized in that the sheet joint portion is provided above a central position of the waist portion in the longitudinal direction .
Other features of the present invention will become apparent from the description of the specification and accompanying drawings.

Advantageous Effects of Invention According to the present invention, it is possible to suppress the occurrence of bulging in the waist portion while improving the flexibility of the waist portion of the absorbent article.

1 is a schematic perspective view of an underpants-type disposable diaper 1. FIG. 1 is a schematic plan view of a diaper 1 in an unfolded and stretched state; FIG. FIG. 3 is a schematic cross-sectional view along the II line of FIG. 2; 4A and 4B are schematic plan views illustrating various joints provided in the diaper 1. FIG. FIG. 5 is a schematic cross-sectional view taken along line II-II of FIG. 4; FIG. 4 is a schematic plan view for explaining the arrangement of sheet joints 60 in the waist portion 20. FIG.

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
An absorbent article having a width direction, a longitudinal direction, and a thickness direction in an unfolded state, and having a pair of waist portions and an absorbent main body provided with an absorbent core, wherein the pair of waist portions At least one of the sections has a pair of sheets and a plurality of elastic members arranged between the pair of sheets and elastic in the width direction, and each of the elastic members extends from the one waist section. having a pair of end fixing portions arranged continuously from one end portion to the other end portion in the width direction of the and having both ends in the width direction fixed to the pair of sheets, and the plurality of elastic members has a first stretchable member and a second stretchable member adjacent to one side of the first stretchable member in the longitudinal direction, and in a region inside the end fixing portion in the width direction, the The first stretchable member and the second stretchable member have a non-fixed portion where they are not fixed to the pair of sheets, and a sheet joint portion where the facing surfaces of the pair of sheets are joined to each other, the sheet joint portion is arranged continuously in the longitudinal direction from at least one end of the second elastic member to the other end of the first elastic member in the longitudinal direction. Absorbent article.

According to such an absorbent article, by providing the stretchable member with the non-fixed portion, the effect of hardening of the adhesive or the like is reduced, and hardening of the waist portion can be suppressed. A portion of the stretchable member is fixed between the pair of sheets forming the waist portion by the sheet joints that are continuous in the longitudinal direction, thereby suppressing vertical displacement of the stretchable member. , the rigidity between the plurality of elastic members arranged in the vertical direction can be increased. As a result, it is possible to make it difficult for the waist part to become loose when the absorbent article is worn. That is, it is possible to prevent the waist from becoming loose while improving the flexibility of the waist.

In such an absorbent article, it is desirable that a plurality of the sheet joint portions be provided at intervals in the width direction.

According to such an absorbent article, compared with the case where only one sheet joint portion is provided, it is possible to easily suppress the displacement of the elastic member in the vertical direction over a wide range in the width direction. can be done. In addition, each of the sheet joints functions like a pillar that vertically supports the sheet forming the waist portion, so that the waist portion is less likely to bulge up and down. Therefore, in the region where a plurality of sheet joints are provided, bulging around the waist and deterioration of fit are further suppressed. In addition, since the number of joints between the pair of sheets forming the waist portion increases, the strength of the waist portion can be increased as a whole.

In this absorbent article, it is desirable that at least one sheet joint portion is provided in a region inside both ends of the absorbent main body in the width direction.

According to such an absorbent article, the stretchable member is joined by the sheet joining portion in the region inside both ends of the absorbent main body in the width direction, thereby preventing the waist portion from sagging in the region. can be suppressed. In addition, since the stretchable force of the stretchable member is more likely to act in this region, the absorbent main body is more likely to fit the wearer's body, and excrement such as urine leaks to the outside, and the positional displacement of the absorbent core is prevented. You can prevent it from happening.

The absorbent article has a body joint portion that joins the absorbent body and the waist portion, and has a portion where the sheet joint portion and the body joint portion overlap in the longitudinal direction. It is desirable that

According to such an absorbent article, it is suppressed that a gap is generated between the sheet joint portion and the main body joint portion in the longitudinal direction, and the rigidity of the waist portion is locally lowered in the gap portion. can. Therefore, bending or deformation of the waist portion in the longitudinal direction starting from the low-rigidity portion is suppressed, and it is possible to prevent the waist portion from becoming loose.

In such an absorbent article, it is desirable that the sheet joint portion and the main body joint portion have overlapping portions when viewed in the thickness direction.

According to such an absorbent article, the rigidity of the waist portion is increased in the portion where the sheet joint portion and the main body joint portion overlap, and it is possible to prevent the occurrence of sagging. In addition, since the sheet joint portion and the main body joint portion form a continuous joint portion along the longitudinal direction, it becomes easy to ensure rigidity over a wide range in the longitudinal direction, and deformation in the longitudinal direction of the waist circumference portion is prevented. can be made easier to suppress.

In such an absorbent article, the pair of said waist parts has an abdominal waist part which is applied to the abdomen of the wearer and a back waist part which is applied to the back of the wearer. It is desirable that the sheet joint portion is provided in the ventral waist portion.

According to such an absorbent article, it is easy to suppress the bulge around the waist on the abdomen side, so even if a wearer with a bulging stomach such as an infant wears the absorbent article, the abdomen will not be stretched. It becomes easy to be covered well. Therefore, it is possible to prevent the abdomen of the wearer from being exposed and the wearer's fit on the ventral side from being deteriorated.

In this absorbent article, the sheet joints are provided in the ventral waist portion and the back waist portion, and the width of the sheet joints provided in the ventral waist portion is It is desirable that the total length in the direction is equal to or greater than the total length in the width direction of the sheet joints provided in the back side waist portion.

According to such an absorbent article, the width of the portion where the stretchable member is fixed to the waist portion is larger on the ventral side than on the dorsal side, and the positional displacement of the stretchable member on the ventral side is greater. easier to suppress. That is, it is possible to make it difficult to cause sagging in the dorsal side waist region and to make it more difficult to cause sagging in the ventral side waist region.

In this absorbent article, the total length in the width direction of the sheet joints provided in the waist portion is 1/1 of the length in the width direction between the pair of end fixing portions. Less than 2 is desirable.

According to such an absorbent article, in the region between the end fixing portions provided on both sides in the width direction of the waist portion, the pair of sheets constituting the waist portion are not joined together. The proportion becomes larger than the proportion of the joined portion, and the flexibility of the waist portion is easily maintained. As a result, it becomes easier to realize a good touch around the waist when the absorbent article is worn.

It is desirable that such an absorbent article has a central sheet joint portion arranged across the center position of the waist portion in the width direction.

According to such an absorbent article, the elastic member can be fixed between the pair of sheets by the central sheet joining portion at the center position in the width direction of the waist portion where the displacement of the elastic member in the vertical direction tends to increase. . As a result, the vertical positional displacement of the elastic member at the center position in the width direction is relatively small, and it becomes easier to suppress the bulging of the waist portion.

The absorbent article has a plurality of sheet joint portions, wherein the length in the width direction of the central sheet joint portion among the plurality of sheet joint portions is the length of the sheet other than the central sheet joint portion. It is desirable that it is longer than the length of the joint in the width direction.

According to such an absorbent article, it is possible to widen the range (width) of the portion where the stretchable member is fixed between the pair of sheets at the center position in the width direction. As a result, vertical positional displacement of the expandable member is suppressed, and it becomes easier to suppress bulging of the waist portion.

In such an absorbent article, it is desirable that at least a portion of the sheet joint portion overlap both ends of the absorbent main body in the width direction.

According to such an absorbent article, both ends in the width direction of the absorbent main body are portions that form a boundary between a high-rigidity region and a low-rigidity region in the waist portion. By providing the sheet joint portion and reducing the change in rigidity at the boundary, it is possible to make it difficult to form a starting point for deformation of the waist portion. As a result, it is possible to more easily suppress the generation of sagging around the waist.

In such an absorbent article, it is desirable that the total length of the sheet joints in the width direction is 1/4 or more of the length of the waist portion.

According to such an absorbent article, when the waist portion is grabbed and pulled up by the wearer or the like when the absorbent article is put on, the waist portion is torn or the pair of sheets are peeled off. is suppressed.

In this absorbent article, the maximum length of the sheet joint portion in the longitudinal direction is 1/2 or more of the distance between the upper end of the waist portion and the upper end of the absorbent main body. , is desirable.

According to such an absorbent article, at the upper end portion of the waist portion where bulging is likely to occur, the sheet member forming the waist portion is supported in the longitudinal direction by the sheet joint portion 60 in a range of half or more in the longitudinal direction. Therefore, it is difficult for the waist to become loose. In addition, since the strength of the upper end portion of the waist portion can be easily secured, even if the upper end region is grabbed and pulled by the wearer or the like when the absorbent article is put on, the waist portion can be easily secured. can be made difficult to tear.

In such an absorbent article, it is desirable that the sheet joint portion is continuously provided between the upper end of the waist portion and the upper end of the absorbent main body in the longitudinal direction.

According to such an absorbent article, since the sheet member forming the waist portion is continuously supported in the longitudinal direction by the sheet joint portion 60 at the upper end portion of the waist portion, where the waist portion is prone to bulging, the waist portion is Scratches are less likely to occur. In addition, since the strength of the upper end portion of the waist portion is increased as a whole, the waist portion becomes strong against pulling in the longitudinal direction (vertical direction). Therefore, as compared with the case where the sheet joints are intermittently formed in the longitudinal direction, it is easier to prevent the upper end portion of the waist portion from tearing.

In such an absorbent article, it is desirable that the upper end of the waist portion in the longitudinal direction does not have a joining portion for joining the pair of sheets together.

According to such an absorbent article, since a dry edge is formed at the upper end of the waist portion, the flexibility of the upper end increases, and when the absorbent article is worn, the upper edge of the waist portion touches the wearer's skin. It becomes difficult to swallow. As a result, it is possible to realize a good touch feeling around the waist.

In such an absorbent article, it is desirable that the sheet joint portion is provided above the central position of the waist portion in the longitudinal direction.

According to such an absorbent article, the strength of the upper longitudinal region of the waist portion, which is likely to be grasped by the wearer or the like, is increased when the absorbent article is put on, and the waist portion is torn or ripped. can be effectively suppressed.

===Embodiment===
Hereinafter, as an absorbent article according to the present invention, an embodiment will be described by taking an underpants-type disposable diaper for infants as an example. However, the absorbent article according to the present invention is not limited to the above, and can be applied to adult underpants-type disposable diapers, tape-type disposable diapers, sanitary shorts, and the like.

<Structure of pants-type disposable diaper 1>
FIG. 1 is a schematic perspective view of an underpants-type disposable diaper 1 (hereinafter referred to as "diaper 1") of this embodiment. FIG. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state. FIG. 3 is a schematic cross-sectional view taken along line I--I of FIG. The "deployed state" of the diaper 1 is a state in which the connecting portion 40 (to be described later) is released, the pair of waist portions 20 and 30 (to be described later) are separated, and the diaper 1 is opened in the longitudinal direction. In addition, the "stretched state" of the diaper 1 is a state in which the diaper 1 is stretched without wrinkles, and the dimensions of each member (for example, the waist portions 20, 30, etc.) constituting the diaper 1 are the same as the dimensions of the member alone. It is in a state of being stretched to match or nearly match the length.

1, the diaper 1 has a width direction, a vertical direction, and a front-rear direction, and is formed with a waist opening BH and a pair of leg openings LH. In the vertical direction, the waist side is the upper side and the crotch side is the lower side. In the front-rear direction, the wearer's ventral side is the front side, and the wearer's dorsal side is the rear side. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are laminated is called the thickness direction. Use the skin side. Moreover, in the unfolded state of FIG. 2, the diaper 1 has a longitudinal direction and a width direction that intersect each other. The longitudinal direction is the direction along the vertical direction, and the width direction is the same direction as the width direction in the pants-type state of FIG.

The diaper 1 has a pair of waist portions 20 and 30 and an absorbent body 10 . Of the pair of waist sections 20 and 30, the one that is applied to the abdomen of the wearer is referred to as the abdomen side waist section 20, and the one that is applied to the back side of the wearer is referred to as the back side waist section 30.例文帳に追加

In the unfolded state shown in FIG. 2, the diaper 1 has one longitudinal end (abdominal side) of the absorbent main body 10 arranged in the center of the abdominal waist portion 20 in the width direction. The end portion of the absorbent main body 10 on the other longitudinal direction side (dorsal side) is arranged at the central portion of the back side waist portion 30 in . In the diaper 1 in the unfolded state, the absorbent main body 10 is folded in half at substantially the center in the longitudinal direction, and both side portions in the width direction of the ventral waist portion 20 and the back waist portion 30 form a pair of locking portions 40 . 1, the diaper 1 in the underpants-type state shown in FIG. 1 is obtained. Further, as a locking method for the locking portion 40, welding, bonding with an adhesive, or the like can be exemplified.

The absorbent main body 10, as shown in FIG. It has a liquid-impermeable back sheet 13 and an exterior sheet 14 arranged on the non-skin side of the back sheet 13. - 特許庁

As shown in FIG. 2, the absorbent body 11 has an absorbent core 11A that absorbs and retains excretions such as urine, and a liquid-permeable core wrap sheet 11B that covers the absorbent core 11A. As the absorbent core 11A, liquid absorbent fibers such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape can be exemplified. Note that the absorbent core 11A does not have to be covered with the core wrap sheet 11B.

As shown in FIG. 3, the ventral waist portion 20 and the back waist portion 30 are composed of soft skin-side sheets 21, 31 and non-skin-side sheets 22, 32 (a pair of sheets) such as nonwoven fabric, respectively, and It has a plurality of waist stretching members 23, 33 arranged between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32 and stretchable in the width direction. Between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32, the plurality of waist elastic members 23, 33 are arranged side by side at intervals in the vertical direction (longitudinal direction), and are arranged in the width direction. It is fixed in the extended state. Therefore, the ventral waist portion 20 and the back waist portion 30 expand and contract in the width direction to fit the wearer's waist portion. As the waist stretchable members 23 and 33, thread-like stretchable members such as thread rubber and elongated stretchable sheets can be exemplified.

In addition, in the waist portions 20 and 30 of the present embodiment, a portion of the non-skin side sheets 22 and 32 is folded back toward the skin at the outer ends in the longitudinal direction (upper end in the vertical direction), and the folded back It is configured such that a portion overlaps the skin side of the skin side sheet 21 and the absorbent main body 10 (see FIG. 3). However, the construction of the waist sections 20, 30 is not limited to the illustrated one, and for example, a construction of three or more layers in which different sheets are laminated on a pair of sheets may be used, or one sheet may be folded. A pair of sheets may also be used.

In addition, in this embodiment, as a pants-type disposable diaper, the abdominal waist portion 20 and the back waist portion 30 are separated, and the abdominal waist portion 20, the back waist portion 30, and the absorbent main body 10 are divided into three parts. Although a so-called three-piece type having members has been exemplified, it is not limited to this. For example, the ventral waist part 20 and the back waist part 30 are formed as one continuous member through the crotch part, and the exterior in which the ventral waist part 20 and the back waist part 30 are integrated. A so-called two-piece pants-type disposable diaper having two members, a member and an absorbent body, may also be used.

<Regarding waist portions 20 and 30>
Next, the configuration of the pair of waist portions 20 and 30 will be described by taking the ventral waist portion 20 as an example. However, at least one of the pair of waist portions 20 and 30 may have the following configuration. That is, both waist sections 20 and 30 may be configured as follows, or the abdominal side waist section 20 may be different from the following configuration, and the back side waist section 30 may be configured as follows. The side waist portion 20 may have the following configuration, and the back side waist portion 30 may have a different configuration from the following. Other embodiments are also the same.

FIG. 4 is a schematic plan view illustrating various joints provided on the diaper 1. FIG. Similar to FIG. 2, FIG. 4 shows the diaper 1 in the unfolded state and the stretched state. 5 is a schematic cross-sectional view taken along line II-II of FIG. 4. FIG.

The plurality of waist elastic members 23 included in the ventral waist portion 20 (hereinafter referred to as the "trunk portion 20") are arranged continuously from one end to the other end in the width direction of the waist portion 20. A continuous stretchable member 231 (stretchable member of the present invention)” and a plurality of “non-continuous stretchable members 232” arranged discontinuously in the width direction.

The continuous stretchable member 231 has a “pair of end fixing portions 50 ” fixed to the skin-side sheet 21 and the non-skin-side sheet 22 at both ends in the width direction thereof. The fixing method in the end fixing part 50 is not particularly limited. , 22”), or a method of fixing with a pair of welded portions crossing the continuous stretchable member 231, or the like.

In addition, in FIG. 4 , the pair of end fixing portions 50 are arranged inside the pair of locking portions 40 in the width direction separately from the pair of locking portions 40 . However, it is not limited to this. The pair of locking portions 40 may be a pair of end fixing portions. That is, the diaper 1 does not have to have the end fixing portions 50 shown in FIG.

The continuous stretchable member 231 has a “non-fixed portion 51 ” that is not fixed to the pair of sheets 21 and 22 inside the fixed end portion 50 in the width direction. In FIG. 4 , the non-fixed portion 51 is continuously provided from the fixed end portion 50 on one side in the width direction to the fixed end portion 50 on the other side. That is, the non-fixed portion 51 is formed in the region between the inner ends of the pair of fixed end portions 50, 50 in the width direction in the region where the continuous stretchable member 231 is arranged.

The non-continuous stretchable member 232 is arranged below (inside in the longitudinal direction) the lowermost continuous stretchable member 231 in the waist portion 20 . The discontinuous stretchable member 232 is discontinuous in at least a part of the region R1 (central portion in the width direction) that overlaps the absorbent core 11A in the width direction (see FIGS. 2 and 4). In other words, a part of the waist elastic member 23 provided in the area overlapping the absorbent main body 10 has a non-stretchable area (discontinuous portion) in the central portion in the width direction. Therefore, contraction of the absorbent core 11A by the waist elastic member 23 can be suppressed, and flatness of the absorbent core 11A can be secured.

The non-continuous elastic member 232 has fixed end portions 55 and non-fixed portions 56 . The end fixing portions 55 are portions where both widthwise end portions of the continuous portion of the discontinuous stretchable member 232 are fixed to the pair of sheets 21 and 22 . The non-fixed portion 56 is a portion where the discontinuous stretchable member 232 is not fixed to the pair of sheets 21 and 22 between the fixed end portions 55 . Specifically, as shown in FIG. 4, a pair of end fixing portions 55, 55 are provided at one end in the width direction of the waist portion 20 and one end in the width direction of the absorbent core 11A. are arranged, and the non-fixed portion 56 is arranged therebetween. Similarly, a pair of fixed end portions 55, 55 are arranged at the other widthwise end of the absorbent core 11A and the other widthwise end of the waist portion 20, and an unfixed portion 56 is provided therebetween. are placed.

In the diaper 1, the waist elastic members 23 (231, 232) are not fixed to the pair of sheets 21, 22 (non-fixed parts 51, 56). Compared to the fixed portions (fixed end portions 50 and 55), the rigidity of the waist portion 20 is low because there is no effect of hardening of the adhesive. That is, by providing the non-fixed portions 51 and 56 to the waist elastic member 23, the flexibility of the waist portion 20 is improved, and the feel of the diaper 1 when worn can be improved.

In addition, in the width direction of the waist portion 20, in the region between the inner sides of the pair of end fixing portions 50, 50 (that is, the region where the non-fixing portion 51 is provided), A sheet joining portion 60 for joining the skin-side sheet 21 and the non-skin-side sheet 22 is provided. The sheet joint portion 60 is formed by applying an adhesive such as a hot melt adhesive to a predetermined region of at least one of the non-skin side surface of the skin side sheet 21 and the skin side surface of the non-skin side sheet 22. The facing surfaces of the sheets 21 and 22 are joined together (see FIG. 5). In this embodiment, a plurality of vertically long rectangular sheet joint portions 60 along the longitudinal direction (vertical direction) are arranged side by side at intervals in the width direction (see FIG. 4). Details of the size and arrangement of the sheet joint portion 60 will be described later.

Further, in the diaper 1, in a region where the waist portion 20 (30) and the absorbent main body 10 overlap in the thickness direction, there is a body joint portion 70 for joining the waist portion 20 (30) and the absorbent main body 10. is provided. The main body joint portion 70 is provided in a predetermined region of at least one of the skin side surface of the waist portion 20 (skin side surface of the skin side sheet 21) and the non-skin side surface of the absorbent main body 10 (non-skin side surface of the outer sheet 14). It is formed by applying an adhesive such as a melt adhesive, and joins the waist portion 20 and the absorbent main body 10 in the thickness direction (see FIG. 5). In this embodiment, a plurality of vertically long rectangular main body joint portions 70 along the longitudinal direction (vertical direction) are arranged side by side at intervals in the width direction (see FIG. 4). When viewed in the thickness direction (front-rear direction), some of the plurality of body joint portions 70 are arranged so as to overlap with the sheet joint portion 60 .

FIG. 6 is a schematic plan view for explaining the arrangement of the sheet joint portion 60 in the waist portion 20. As shown in FIG. In FIG. 6, five continuous elastic members 231a to 231e are arranged from the outer side (other side) to the inner side (one side) in the longitudinal direction of the waist portion 20 (that is, from the upper side to the lower side in the vertical direction). continuous elastic members 231 are arranged adjacent to each other with a predetermined interval. Then, among the five continuous elastic members 231, the longitudinal direction (vertical direction) is extended so as to straddle (intersect) the four continuous elastic members 231b to 231e excluding the continuous elastic member 231a arranged at the upper end of the waist part 20. ) are provided. Note that the sheet joint portion 60 does not necessarily straddle all of the four continuous elastic members 231b to 231e, but at least the two continuous elastic members 231, 231 arranged adjacent to each other in the longitudinal direction. Assume that you are straddling.

For example, the sheet joint portion 60 extends in the longitudinal direction from the upper end (the other end) of the continuous elastic member 231b (the first elastic member) to the lower end (one side) of the continuous elastic member 231c (the second elastic member). side edges). As a result, the two continuous stretchable members 231b and 231c (the first stretchable member and the second stretchable member) adjacent to each other in the longitudinal direction are joined to the pair of sheets 21 and 22 by the sheet joining portion 60 and fixed. In the case of FIG. 6, four continuous stretchable members 231b to 231e are fixed to the pair of sheets 21 and 22 respectively in the area where the sheet joint 60 intersects.

As described above, in the diaper 1, the flexibility of the waist portion 20 is improved by providing the non-fixed portion 51 in the continuous stretchable member 231 (the waist stretchable member 23). However, since the continuous stretchable member 231 is not fixed to the pair of sheets 21 and 22 at the portion where the non-fixed portion 51 is provided, the continuous stretchable member 231 moves vertically when the diaper 1 is worn. may be lost. That is, there is a possibility that the position of the continuous stretchable member 231 in the vertical direction may be displaced with respect to the waist portion 20 . In addition, due to such a positional deviation, the distance (interval) between the plurality of continuous elastic members 231, 231 arranged side by side may become small in the vertical direction.

When the diaper 1 is put on, if the position of the continuous stretchable member 231 is shifted in the vertical direction in the waist portion 20 or if the interval between the continuous stretchable members 231, 231 becomes narrower, the waist portion 20 is formed. There is a possibility that the sheets 21 and 22 may bulge in the vertical direction, or the tightness around the wearer's waist may become uneven and the fit of the waist 20 may deteriorate. In particular, in the diaper 1, since the non-fixed portion 51 is provided in a wide region in the width direction between the fixed end portions 50, 50, the displacement of the continuous stretchable member 231 becomes large, 20 is prone to sagging and the like.

On the other hand, in the present embodiment, a part of the continuous stretchable member 231 is fixed to the pair of sheets 21 and 22 by the sheet joints 60 along the longitudinal direction. It is possible to make vertical positional deviation less likely to occur. Further, since the sheet joints 60 are provided continuously along the longitudinal direction, the rigidity of the waist portion 20 is increased between the plurality of continuous elastic members 231, 231 arranged in the longitudinal direction (vertical direction), and sagging is prevented. can be made difficult. On the other hand, as shown in FIGS. 4 and 6, the sheet joint portion 60 is formed in an elongated band shape along the longitudinal direction, so that the sheets 21 and 22 and the continuous stretchable member 231 are actually fixed. The areas of the portions are small, and it is difficult for the user (user or wearer) to feel the hardening of the sheets 21 and 22 . Therefore, it is possible to prevent the waist part 20 from becoming loose while improving the flexibility of the waist part 20 .

Furthermore, in the present embodiment, a plurality of sheet joint portions 60 are provided at intervals in the width direction. Therefore, compared to the case where only one sheet joint portion 60 is provided, the positional deviation of the continuous elastic member 231 in the vertical direction can be prevented over a wide range in the width direction between the end fixing portions 50, 50. can be easily suppressed. In addition, since each of the plurality of sheet joint portions 60, 60, . . . functions like a pillar that vertically supports the sheet forming the waist portion, the waist portion 20 is less likely to sag vertically. Therefore, it is possible to more easily suppress the swelling of the waist portion 20 and the deterioration of the fit in the region where the plurality of sheet joint portions 60, 60, . . . are provided.

In addition, since a plurality of sheet joining portions 60 are provided in the width direction, the number of places where the pair of sheets 21 and 22 are joined to each other between the end fixing portions 50 and 50 increases, and the strength of the waist portion 20 increases. can increase Therefore, when the waist portion 20 is pulled upward (that is, from the toe side to the crotch side of the wearer) when the diaper 1 is worn, the waist portion 20 is prevented from being torn. be able to.

Further, by setting the intervals in the width direction of the plurality of sheet joint portions 60 at equal intervals as shown in FIG. . In other words, it is possible to easily suppress the positional displacement of the continuous elastic member 231 in the vertical direction at any position in the width direction. can be done. In this way, the fit of the diaper 1 (the waist portion 20) can be further improved.

In addition, in FIG. 6, the plurality of sheet joint portions 60 are all formed to have the same shape (size). That is, each of the plurality of sheet joints 60 has a vertically long rectangular shape with a length L60 in the longitudinal direction and a length (width) W60 in the width direction (L60>W60). 60 need not necessarily have the same shape. For example, the length L60 in the longitudinal direction and the length W60 in the width direction may be different, or may be elliptical or other shapes.

At least one sheet joint portion 60 is provided in a region R1 of the waist portion 20 that overlaps with the absorbent main body 10 in the width direction. In other words, in the width direction, at least one sheet joint 60 is provided in a region inside both ends of the absorbent body 10 . In FIG. 6, nine sheet joints 60 are provided in regions inside the both ends 10es, 10es of the absorbent body 10 in the width direction. As a result, it is possible to easily suppress the occurrence of bulging of the waist portion 20 in the range indicated by R1 in FIG.

When the diaper 1 is worn, if the waist portion 20 is sagging in the portion above the absorbent main body 10 in the region R1, the absorbent main body 10 and the wearer's body ( Abdomen) may create a gap. In this case, excretions such as urine may leak to the outside through the gap, or the position of the absorbent main body 10 (absorbent core 11A) may be displaced.

On the other hand, in the diaper 1 of the present embodiment, the sheet joints 60 are provided in the region (R1 in FIG. 6) inside the both ends 10es, 10es of the absorbent body 10 in the width direction. , the stretchable force by the continuous stretchable member 231 is likely to act on the waist portion 20 . As a result, bulging of the waist portion 20 is suppressed, and displacement of the absorbent main body 10 (absorbent core 11A) is suppressed, making it difficult for excrement to leak.

In addition, since infants, who are the main wearers of the diaper 1, generally have a body shape with a protruding stomach, if the ventral waist portion 20 is sagging, the abdomen is firmly covered. may become impossible. For example, when the diaper 1 is worn, if the abdomen side waist portion 20 is pulled downward (from the waist side to the crotch side) in the vertical direction along the slope of the baby's bulging abdomen, the baby may The abdomen of the diaper 1 may be exposed, or the fit of the waist portion 20 may be deteriorated, causing the position of the entire diaper 1 to shift.

On the other hand, in the diaper 1, since the sheet joint portion 60 is provided in the abdomen side waist portion 20, the swelling of the waist portion 20 on the abdomen side is suppressed. Even if there is, it is easy to cover the stomach firmly. Therefore, it is possible to prevent the baby's abdomen from being exposed and the fit on the abdomen from being deteriorated.

In addition, as shown in FIG. 4 , it is desirable that the sheet joint portion 60 is provided not only in the ventral waist portion 20 but also in the back waist portion 30 . As a result, the waist portion 30 is prevented from bulging on the back side as well as on the belly side, and when the diaper 1 is worn, the baby's back is not exposed and the fit on the back side is not deteriorated. Suppressed.

At this time, the total length (width) W60f in the width direction of each of the sheet joint portions 60 (referred to as sheet joint portions 60f for convenience) provided in the ventral waist portion 20 is the dorsal waist portion 30 It is desirable that the total length (width) W60b in the width direction of each of the plurality of sheet joint portions 60 (referred to as sheet joint portions 60b for convenience) provided on the 1 is equal to or greater than the sum of the lengths (width) W60b. By doing so, the width of the portion where the continuous stretchable member 231 is fixed to the waist portions 20 and 30 is larger on the ventral side than on the dorsal side. That is, the continuous stretchable member 231 is joined to the pair of sheets 21 and 22 over a wider range on the ventral side than on the dorsal side. This makes it easier to suppress the positional displacement of the continuous elastic member 231 on the ventral side while suppressing the positional displacement of the continuous elastic member 331 on the back side. That is, it is possible to suppress the swelling of the ventral waist portion 20 more easily while suppressing the swelling of the back waist portion 30 . As described above, the diaper 1 is mainly worn by infants and has a body shape with a protruding abdomen. It is possible to effectively prevent the baby's stomach from being exposed by making it difficult for the baby to come off. Thereby, it becomes possible to provide the diaper 1 more suitable for infants.

In addition, in the waist portion 20 (30) of the diaper 1, the length in the width direction of the portion occupied by the sheet joint portion 60 in the region where the non-fixed portion 51 is provided is less than 1/2 of the length in the width direction of the area where the In other words, in the waist portion 20, the total length W60 in the width direction of the plurality of sheet joint portions 60 is the length in the width direction of the region between the end fixing portions 50, 50 in the width direction ( less than 1/2 the width of the region indicated at 51). If the total width of the sheet joint portion 60 in the region between the end fixing portions 50, 50 is half or more of the width of the region, the pair of sheets 21, 22 of the waist portion 20 are joined together. The portion that is bonded is greater than the portion that is not bonded. In this case, the flexibility of the waist portion 20 may be impaired, and the feel of the diaper 1 when worn may be greatly deteriorated.

On the other hand, in the present embodiment, as is clear from FIG. 6, the total length of the sheet joint portion 60 in the width direction is equal to the length of the region between the end fixing portions 50 and 50 in the width direction. is smaller than half. Therefore, in this region, the ratio of the portion where the pair of sheets 21 and 22 are not joined increases, and the flexibility of the waist portion 20 is easily maintained. As a result, it becomes easy to realize a good feel of the waist portion 20 when wearing the diaper 1 .

Further, the total length (width) W60 of the sheet joint portion 60 in the width direction is 1/4 or more of the length W20 in the width direction of the waist portion 20 (see FIG. 6). In other words, in the waist portion 20, the pair of sheets 21 and 22 are joined to each other over at least 1/4 or more of the wearer's front (rear) waist circumference. When the diaper 1 is put on, it is assumed that the wearer (or the person who wears the diaper) grabs and pulls up a quarter or more of the waist portion 20 in the width direction. Therefore, since the pair of sheets 21 and 22 are joined at 1/4 or more in the width direction of the waist portion 20, the waist portion 20 may tear or the pair of sheets 21 and 22 may break when the diaper 1 is put on. is suppressed from peeling off. That is, the strength of the waist portion 20 as a whole can be increased. In addition, in the diaper 1 of the present embodiment, as described above, the total area of the plurality of sheet joint portions 60 is limited to a predetermined size or less, so that the flexibility of the waist portion 20 is firmly secured. This makes it difficult for the wearer to feel uncomfortable.

In the longitudinal direction, the length L60 of the sheet joint portion 60 is equal to or longer than half the distance Deu between the upper end 20eu of the waist portion 20 and the upper end 10eu of the absorbent main body 10 ( L60≧Deu×1/2). That is, in the waist portion 20 of the present embodiment, the pair of sheets 21 and 22 and the continuous stretchable member 231 are formed in half or more of the region between the upper end 20eu and the upper end 10eu of the absorbent body 10 in the longitudinal direction. They are joined by a joint 60 .

The region represented by Deu has the smallest number of sheet members laminated in the thickness direction of the waist portion 20, and thus is a region with low rigidity and prone to sagging. On the other hand, in the diaper 1, the sheet joint portion 60 is provided in a range of half or more in the longitudinal direction of the region where the waist portion 20 tends to sag. Therefore, in a range of more than half of the region where the waist portion 20 tends to sag, the sheet joint portion 60 functions like a pillar that vertically supports the sheets 21 and 22 forming the waist portion 20, and the waist portion 20 does not sag. It becomes easier to suppress the occurrence of

In addition, when the diaper 1 is put on, the region of the waist portion 20 above the upper end 10eu of the absorbent main body 10 is a portion that is grasped and pulled by the wearer (or the wearer). Therefore, sufficient strength is required. Therefore, the sheet joint portion 60 is provided in a range of 1/2 or more in the longitudinal direction of the upper end portion of the waist portion 20, so that the upper end portion (the portion of Deu) of the waist portion 20 has sufficient strength. Even if the portion is pulled in the longitudinal direction (vertical direction of the diaper 1), tearing of the waist portion 20 is suppressed.

The sheet joint portion 60 is provided continuously in the longitudinal direction in a region (Deu portion) between the upper end 20eu of the waist portion 20 and the upper end 10eu of the absorbent main body 10 . Since the sheet joints 60 are formed continuously in the longitudinal direction in this manner, the sheets 21 and 22 forming the waist portion 20 are continuously supported by the sheet joints 60 in the longitudinal direction. Therefore, it becomes easier to prevent the waist portion 20 from becoming loose. In addition, the strength of the longitudinally continuous region of the upper end portion of the waist portion 20 is increased as a whole. Therefore, when the upper end portion of the waist portion 20 is pulled in the longitudinal direction (vertical direction of the diaper 1), the waist portion 60 is more likely to be attached to the waist than when the sheet joint portion 60 is intermittently formed in the longitudinal direction. It becomes easy to suppress the tearing of the upper end portion of the portion 20 and the peeling of the joint between the sheets 21 and 22 .

However, the upper end 20eu of the waist portion 20 is not provided with the sheet joint portion 60 (see FIG. 6). In other words, the sheet joint portion 60 is provided at a predetermined distance downward from the upper end 20eu of the waist portion 20 in the longitudinal direction. That is, in the region between the end fixing portions 50, 50 in the width direction, the upper end 20eu of the waist portion 20 is not provided with a joining portion for joining the pair of sheets 21, 22 to each other. is a so-called dry edge. The upper end 20eu of the waist portion 20 is an edge portion that comes into direct contact with the wearer's skin (around the waist) when the diaper 1 is worn. Rigidity of the upper end 20eu is increased, and the hard edge digs into the skin, which may cause discomfort to the wearer. Therefore, in the diaper 1, the upper end 20eu of the waist portion 20 is made a dry edge to ensure flexibility, so that the upper end 20eu does not dig into the wearer's skin when the diaper 1 is worn, and a good touch can be realized. I'm trying In this region (the region between the end fixing portions 50, 50 in the width direction), not only the sheet joint portion 60 but also any adhesive material for fixing the continuous elastic member 231 to the pair of sheets 21, 22 is applied. Not provided.

In addition, the sheet joint portion 60 is arranged above the central position CL20 of the waist portion 20 in the longitudinal direction (see FIG. 6). As described above, when wearing the diaper 1, the wearer or the like grabs the waist portion 20 and pulls it upward. likely to be Moreover, in the region of the waist portion 20 that is longitudinally above the center position CL20 and does not overlap with the absorbent main body 10, when the diaper 1 is pulled upward during the wearing operation, sagging occurs. Cheap. In the diaper 1 of the present embodiment, by providing the sheet joint portion 60 above the center position CL20 of the waist portion 20, the strength of the region is increased, and the waist portion 20 does not tear when the diaper 1 is put on. It is possible to effectively suppress the occurrence of sagging.

Moreover, it is desirable that the sheet joint portion 60 be arranged so as to straddle the center position CW20 of the waist portion 20 in the width direction. It has been described that the continuous elastic member 231 can move vertically at the non-fixed portion 51 in the region between the fixed end portions 50 , 50 in the width direction. If no sheet joint portion 60 is provided between the joint portions 50, 50, the vertical direction of the continuous elastic member 231 at the midpoint (center position CW20) of the end fixing portions 50, 50 movement (i.e. vertical amplitude) can be maximized. Therefore, in the diaper 1, the sheet joint portion 60 is provided at the center position CW20 in the width direction, and the continuous elastic member 231 is fixed to the pair of sheets 21 and 22 at the center position CW20. In other words, the displacement of the continuous elastic member 231 in the vertical direction is limited at the point where the amplitude of the continuous elastic member 231 may become maximum.

In the present embodiment, as shown in FIG. 6, of the plurality of sheet joint portions 60, 60, . It is arranged so as to straddle the position CW20. Therefore, since the continuous stretchable member 231 is fixed to the pair of sheets 21 and 22 at the center position CW20, vertical positional displacement of the continuous stretchable member 231 at the center position CW20 can be relatively reduced. This makes it easier to prevent the waist portion 20 from becoming loose.

Further, it is more desirable that the length (width) of the sheet joint portion 60 in the width direction is maximized at the central sheet joint portion 61 positioned at the center in the width direction. In other words, it is desirable that the width W61 of the central sheet joint portion 61 among the plurality of sheet joint portions 60, 60 . . . For example, the length (width) W60 in the width direction of the plurality of sheet joints 60 shown in FIG. You may make it wider than. With such a configuration, it is possible to widen the range (width) of the portion where the continuous elastic member 231 is fixed between the pair of sheets 21 and 22 at the central position CW20. As a result, it is possible to more easily suppress displacement of the continuous elastic member 231 in the vertical direction. Therefore, it becomes easier to prevent the waist portion 20 from sagging.

Moreover, it is desirable that at least a part of the plurality of sheet joint portions 60, 60, . . . In FIG. 6, a predetermined sheet joint portion 62 among the plurality of sheet joint portions 60, 60, . . . A region of the waist portion 20 that overlaps with the absorbent main body 10 has higher rigidity than a region that does not overlap with the absorbent main body 10 . Therefore, in the waist portion 20, a large difference in rigidity occurs between the widthwise ends 10es, 10es of the absorbent main body 10. As shown in FIG. Further, the seats 21 and 22 are more likely to be deformed in the low-rigidity portion of the waist portion 20 than in the high-rigidity portion. That is, the widthwise ends 10es, 10es of the absorbent main body 10 are boundary portions where a difference in rigidity occurs, and tend to be starting points for the waist portion 20 to become loose.

Therefore, in the diaper 1 of the present embodiment, the sheet joint portion 62 is provided so as to overlap the boundary portion where the rigidity difference occurs, and the waist portion 20 in the portion overlapping the widthwise both ends 10es, 10es of the absorbent main body 10. enhances rigidity. As a result, the change in stiffness at the boundaries of both ends 10es is reduced, and the formation of starting points of sagging is suppressed. Therefore, it is possible to more easily prevent the waist portion 20 from becoming loose.

Further, in the diaper 1, as described with reference to FIGS. 4 and 5, a plurality of main body joint portions 70, 70, . The body joint portion 70 has a portion that overlaps the sheet joint portion 60 in the longitudinal direction. As a result, it is possible to prevent the waist portion 20 from bending in the longitudinal direction, or from being deformed in the longitudinal direction and becoming loose.

In the diaper 1 of the present embodiment, as shown in FIG. 4, the sheet joint portion 60 is provided in the upper region in the longitudinal direction of the waist portion 20, and the main body joint portion 70 is provided in the lower region in the longitudinal direction. is provided. In such a configuration, if the sheet joint portion 60 and the main body joint portion 70 do not have a portion that overlaps in the longitudinal direction, that is, between the sheet joint portion 60 and the main body joint portion 70 in the longitudinal direction When a predetermined interval is provided, the rigidity of the waist portion 20 is lower in the portion of the interval than in the portion where the joint portions 60 and 70 are provided. As a result, the spaced portion (low-rigidity portion) functions like a joint, forming a starting point for bending, and the waist portion 20 may easily deform in the longitudinal direction.

In contrast, in the diaper 1 of the present embodiment, the sheet joint portion 60 and the main body joint portion 70 overlap at least partially in the longitudinal direction, forming a portion (interval) where the rigidity is low as described above. Therefore, bending or deformation of the waist portion 20 in the longitudinal direction is suppressed. Therefore, it is possible to more effectively prevent the waist portion 20 from becoming loose.

Furthermore, in the diaper 1, the sheet joint portion 60 and the body joint portion 70 at least partially overlap each other when viewed in the thickness direction (the front-rear direction in the pants-type state). That is, the sheet joint portion 60 and the main body joint portion 70 have a portion that overlaps in the longitudinal direction and overlaps in the width direction. As a result, the rigidity of the waist portion 20 is increased in the overlapped portion, and it is possible to make it more difficult for the waist portion 20 to become loose. In addition, at the portion where the sheet joint portion 60 and the body joint portion 70 overlap in the thickness direction, the sheet joint portion 60 and the body joint portion 70 are integrally formed, so the waist portion 20 becomes loose. It becomes easier to suppress things. For example, in FIG. 4, the central sheet joint portion 61 and the central main body joint portion 71 provided at the center portion in the width direction of the waist portion 20 form a continuous joint portion along the longitudinal direction. , rigidity is easily ensured over a wide range in the longitudinal direction of the waist portion 20 . Therefore, deformation in the longitudinal direction of the waist portion 20 and occurrence of sag are easily suppressed.

===Other Embodiments===
Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. Further, the present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

A post-treatment tape 80 as shown in FIGS. 2 and 3 may be provided on the back waist portion 30 of the diaper 1 . The post-processing tape 80 is, for example, a substantially rectangular tape-shaped member (tape member) elongated in the vertical direction, and has a tape fixing portion 81 (indicated by hatching in FIG. 2) on one side in the vertical direction (longitudinal direction). ), and has an adhesive portion 72 on the other side in the vertical direction (longitudinal direction). The tape fixing portion 81 is formed of an adhesive or the like, and the post-treatment tape 80 is fixed to the non-skin side surface of the non-skin side sheet 32 of the back waist portion 30 by the tape fixing portion 81 so as not to be peeled off. An adhesive is applied to the adhesive part 82, and before using the diaper 1, part of the post-treatment tape 80 is folded with the adhesive part 82 inside, and the adhesive part 82 is not exposed to the outside. Thus, the adhesive surface of the adhesive portion 82 is protected.

When discarding the used diaper 1, the post-treatment tape 80 is stretched and pulled on the diaper 1 that has been rolled up in the vertical direction so that the absorbent body 10 faces inward, so that the adhesive portion 82 is removed. The adhesive part 82 side is wound around the diaper 1 by exposing it. As a result, the diaper 1 can be held in a rolled state, and the diaper 1 can be discarded without leaking excrement or the like adhering to the inside of the diaper 1 (absorbent main body 10) to the outside.

When the post-processing tape 80 is provided, the post-processing tape 80 is arranged so that the tape fixing portion 81 and the sheet joining portion 60 overlap each other when viewed in the thickness direction (front-rear direction). good. In this way, when the post-treatment tape 80 is pulled toward the non-skin side in the thickness direction after use of the diaper 1, the skin-side sheet 31 and the non-skin side sheet 31 joined in the thickness direction via the tape fixing portion 81 can be removed. Both sheets of the skin side sheet 32 are pulled. Therefore, tearing of the sheets 31 and 32 forming the waist portion 30 is suppressed, and the force for pulling the post-processing tape 80 is easily transmitted to the waist portion 30 . This makes it easier to post-process the diaper 1 after use.

1 pants-type disposable diaper (absorbent article),
10 absorbent body,
11 absorber, 11A absorbent core, 11B core wrap sheet,
12 top sheet, 13 back sheet, 14 exterior sheet,
20 ventral waist portion (trunk portion), 30 dorsal waist portion (trunk portion),
21, 31 skin side sheet (sheet),
22, 32 non-skin side sheet (sheet),
23, 33 waist elastic member,
231 continuous elastic member (elastic member),
231b first continuous elastic member (first elastic member),
231c second continuous elastic member (second elastic member),
232 discontinuous elastic members,
40 locking part,
50, 55 end fixing part,
51, 56 non-fixed part,
60 sheet joint, 61 central sheet joint, 62 sheet joint,
70 body joint; 71 central body joint;
80 post-treatment tape, 81 tape fixing portion, 82 adhesive portion

Claims (15)

In the unfolded state, having a width direction, a longitudinal direction, and a thickness direction,
An absorbent article having a pair of waist portions and an absorbent main body having an absorbent core,
At least one of the pair of waist portions has a pair of sheets and a plurality of stretchable members arranged between the pair of sheets and stretchable in the width direction,
Each of the stretchable members is arranged continuously from one end in the width direction to the other end of the one waist portion, and both ends in the width direction are fixed to the pair of sheets. having an end fixing part;
The plurality of elastic members have a first elastic member and a second elastic member adjacent to one side of the first elastic member in the longitudinal direction,
A non-fixed portion in which the first elastic member and the second elastic member are not fixed to the pair of sheets, and opposing surfaces of the pair of sheets in a region inside the fixed end portion in the width direction. a sheet joint where the sheet joints are joined together;
The sheet joint portion is arranged continuously in the longitudinal direction from at least one end of the second stretchable member to the other end of the first stretchable member in the longitudinal direction. ,
The absorbent article , wherein the sheet joint portion is provided above a central position of the waist portion in the longitudinal direction . The absorbent article according to claim 1,
The absorbent article, wherein a plurality of the sheet joint portions are provided at intervals in the width direction. The absorbent article according to claim 1 or 2,
The absorbent article, wherein at least one sheet joint portion is provided in a region inside both ends of the absorbent main body in the width direction. The absorbent article according to any one of claims 1 to 3,
Having a main body joint portion that joins the absorbent main body and the waist portion,
The absorbent article, wherein the sheet joint portion and the main body joint portion have overlapping portions in the longitudinal direction. The absorbent article according to claim 4,
An absorbent article, wherein the sheet joint portion and the main body joint portion have overlapping portions when viewed in the thickness direction. The absorbent article according to any one of claims 1 to 5,
The pair of said waist parts has a ventral waist part that is applied to the wearer's ventral part and a dorsal waist part that is applied to the wearer's dorsal part,
The absorbent article, wherein the sheet joint portion is provided in the abdominal waist portion. The absorbent article according to claim 6,
The sheet joint portion is provided in the ventral waist portion and the dorsal waist portion,
The total length in the width direction of the sheet joints provided in the ventral waist portion is equal to or greater than the total length in the width direction of the sheet joints provided in the dorsal waist portion. An absorbent article characterized by: The absorbent article according to any one of claims 1 to 7,
The total length in the width direction of the sheet joints provided in the waist portion is
An absorbent article characterized by being smaller than 1/2 of the length in the width direction between the pair of end fixing portions. The absorbent article according to any one of claims 1 to 8,
An absorbent article, comprising a central sheet joint portion disposed across a center position of the waist portion in the width direction. In the unfolded state, having a width direction, a longitudinal direction, and a thickness direction,
An absorbent article having a pair of waist portions and an absorbent main body having an absorbent core,
At least one of the pair of waist portions has a pair of sheets and a plurality of stretchable members arranged between the pair of sheets and stretchable in the width direction,
Each of the stretchable members is arranged continuously from one end in the width direction to the other end of the one waist portion, and both ends in the width direction are fixed to the pair of sheets. having an end fixing part;
The plurality of elastic members have a first elastic member and a second elastic member adjacent to one side of the first elastic member in the longitudinal direction,
A non-fixed portion in which the first elastic member and the second elastic member are not fixed to the pair of sheets, and opposing surfaces of the pair of sheets in a region inside the fixed end portion in the width direction. a plurality of sheet joints joined together;
The sheet joint portion is arranged continuously in the longitudinal direction from at least one end of the second stretchable member to the other end of the first stretchable member in the longitudinal direction. ,
The plurality of sheet joints have a central sheet joint arranged across the center position of the waist portion in the width direction,
wherein the length in the width direction of the central sheet-joint portion among the plurality of sheet-joint portions is longer than the length in the width direction of the sheet-joint portions other than the central sheet-joint portion. sexual goods. The absorbent article according to any one of claims 1 to 10,
An absorbent article, wherein at least a portion of the sheet joint portion overlaps both ends of the absorbent main body in the width direction. The absorbent article according to any one of claims 1 to 11,
The absorbent article, wherein the total length of the sheet joint portions in the width direction is 1/4 or more of the length of the waist portion. The absorbent article according to any one of claims 1 to 12,
The maximum length of the sheet joint portion in the longitudinal direction is 1/2 or more of the distance between the upper end of the waist portion and the upper end of the absorbent main body. Goods. The absorbent article according to claim 13,
The absorbent article, wherein the sheet joint portion is continuously provided between the upper end of the waist portion and the upper end of the absorbent main body in the longitudinal direction. The absorbent article according to any one of claims 1 to 14,
The absorbent article, wherein the upper end of the waist portion does not have a joining portion for joining the pair of sheets together in the longitudinal direction.

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