JP5651801B1 - Absorbent articles - Google Patents

Abstract

The present invention provides a diaper that facilitates alignment between the center in the width direction of the diaper and the center of a wearer's body. A plurality of thread-like elastic members are provided along the width direction at an end portion on the back side in the longitudinal direction, and an absorbent core is present in an inner part in the longitudinal direction of the thread-like elastic member. The portion between the innermost thread-like elastic member in the longitudinal direction and the absorbent core is a non-existing portion, and a pair of three-dimensional gather forming portions spaced apart in the width direction is provided along the longitudinal direction in the main body portion. The three-dimensional gather forming portion has a base end portion that cannot stand up and a stand up portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum, and is an end in the longitudinal direction of the stand up portion. The fixing part is formed in the part, and the fixing part is fixed in a state where the end part is overlapped with the main body part. Provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member. And that the absorbent article. [Selection] Figure 6

Description

  The present invention relates to an absorbent article such as a disposable diaper that absorbs excreted fluid such as urine.

  As a disposable diaper (hereinafter, sometimes simply referred to as “diaper”), for example, there is one disclosed in Patent Document 1. Specifically, regarding a tape-type diaper having a fastening tape and a front patch, a central notch that is recessed toward the inner side of the front patch is formed at least on the upper edge side of the front patch. The concave top is located in the central region of the front patch. Therefore, by providing a notch at a place where the wearer's abdomen may hit, the wearer's abdomen can be prevented from hitting the front patch, and the feeling of wear can be improved.

JP 2013-46731 A

  By the way, a large product such as an adult diaper is difficult to spread on a bed or the like, and the position of the wearer's body and the product is aligned (the center of the diaper's width direction and the center of the wearer's body). Alignment) or alignment between the product and the absorbent pad (alignment of the center in the width direction of the diaper and the center in the width direction of the absorbent pad) is difficult.

  For this reason, it is necessary to change a wearer's attitude | position many times at the time of wear of a diaper, and physical burdens, such as a wearer and a caregiver, may increase. Moreover, when it mounts | wears with the position alignment inadequate, the edge part of the back side of a product may be crushed by a wearer's buttocks, and may become a wrinkle. If the diaper is worn in such a state, there is a risk that after-leakage will occur or unevenness will be made with the heel, resulting in pressure ulcers.

  Moreover, as for the diaper in patent document 1, the concave top part of the center notch part is located in the center area | region of a front patch. However, when the diaper is worn, the unfolded diaper 1 is generally laid under the wearer's body (back side). Therefore, even if a concave top portion is provided on the front (portion located on the abdomen side of the wearer), it is difficult to obtain a mark for alignment.

  An object of the present invention is to provide a diaper that facilitates alignment between the center of the diaper in the width direction and the center of the wearer's body (or the center of the absorbent pad in the width direction).

The main invention for achieving the above object is:
The main body having a longitudinal direction, a width direction, and a thickness direction is an absorbent article having an absorbent core,
A plurality of thread-like elastic members are provided along the width direction at an end of the main body portion on the back side in the longitudinal direction,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the thread-like elastic member, and the innermost yarn-like elastic member in the longitudinal direction in the main body portion and the absorbency are provided. The portion between the core is a non-existing portion where the thread-like elastic member and the absorbent core do not exist,
A pair of three-dimensional gather forming portions spaced apart in the width direction is provided in the main body portion along the longitudinal direction,
The three-dimensional gather forming portion includes a three-dimensional gather elastic member arranged in the longitudinal direction, and a base end portion that cannot stand up and a stand-up portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum. Having side by side in the width direction,
A fixing portion for fixing the end portion in a state where the end portion is overlapped with the main body portion is formed at the end portion in the longitudinal direction of the standing portion, and the innermost portion in the longitudinal direction among the fixing portions. A fixed end is located in the non-existing portion;
At least a part of the fixing portion is provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction among the plurality of thread-like elastic members ,
A dorsal side flap is formed on the back side of the main body so as to extend outward in the width direction from the main body, and a pair of fastening tapes are provided on both sides of the dorsal side flap in the width direction. And the pair of fastening tapes each have an engaging portion that engages with the abdomen side portion of the main body portion when the absorbent article is worn,
When a center position in the longitudinal direction at a predetermined position in the width direction of the engagement portion is a center position, a center line that connects the center positions of the pair of engagement portions along the width direction, The absorbent article is characterized in that it passes through the non-existing portion at the center in the width direction of the absorbent article.

  ADVANTAGE OF THE INVENTION According to this invention, position alignment with the center of the width direction of a diaper and the center of a wearer's body (or the center of the width direction of an absorbent pad) becomes easy.

It is a schematic plan view of the unfolded state of the diaper 1 which concerns on embodiment. 2A, 2B, and 2C are an AA sectional view, a BB sectional view, and a CC sectional view in FIG. 1, respectively. It is a schematic perspective view of the diaper 1 of a mounting state. It is a schematic plan view which expands and shows the back side part 1b of the diaper 1 which concerns on embodiment. It is a schematic sectional drawing which shows a mode that the pocket-shaped space SP is formed in the main-body part 1k based on the contraction force of the solid gathers 41g1. It is a schematic plan view which expands and shows the back side part 1b in the natural state of the diaper 1 which concerns on embodiment. It is a schematic plan view which expands and shows the back side part 1b of the diaper 1 which concerns on other embodiment. It is a schematic plan view which expands and shows the back side part 1b of the diaper 1 which concerns on other embodiment. It is a schematic plan view which expands and shows the back side part 1b of the diaper 1 which concerns on other embodiment. It is a schematic plan view which expands and shows the back side part 1b of the diaper 1 which concerns on other embodiment. It is a schematic plan view of the unfolded state of the diaper 1 which concerns on other embodiment. It is longitudinal direction sectional drawing of the state which folded the diaper 1 which concerns on other embodiment into three.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
The main body having a longitudinal direction, a width direction, and a thickness direction is an absorbent article having an absorbent core,
A plurality of thread-like elastic members are provided along the width direction at an end of the main body portion on the back side in the longitudinal direction,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the thread-like elastic member, and the innermost yarn-like elastic member in the longitudinal direction in the main body portion and the absorbency are provided. The portion between the core is a non-existing portion where the thread-like elastic member and the absorbent core do not exist,
A pair of three-dimensional gather forming portions spaced apart in the width direction is provided in the main body portion along the longitudinal direction,
The three-dimensional gather forming portion includes an elastic member for three-dimensional gather in the longitudinal direction, and a base end portion that cannot stand up and an upright portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum. Having side by side in the width direction,
A fixing portion for fixing the end portion in a state where the end portion is overlapped with the main body portion is formed at the end portion in the longitudinal direction of the standing portion, and the innermost portion in the longitudinal direction among the fixing portions. A fixed end is located in the non-existing portion;
At least a part of the fixing portion is provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction among the plurality of thread-like elastic members. Absorbent article.

  According to such an absorbent article, at least a part of the fixing portion is provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction, so that it stands up in a natural state. A plurality of thread-like elastic members are drawn inward based on the contraction force in the longitudinal direction acting on the portion. Therefore, the back end is formed in a shape (R shape) close to an arc. Further, since the fixed end is located in the non-existing portion, in the natural state, the non-existing portion having lower rigidity than other regions is drawn inward based on the contraction force in the longitudinal direction acting on the standing portion. The non-existing portion drawn toward the inside and the portion on the back side combine to form a shape (R shape) closer to an arc. In this way, by forming the vicinity of the back side end portion (the back side end portion and the non-existing portion drawn inward) in a shape close to an arc, the center in the width direction of the diaper and the center of the wearer's body (Or the center of the absorbent pad in the width direction) can be easily aligned.

Such an absorbent article,
The fixing portion is preferably provided over the entire region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction.

  According to such an absorbent article, the fixing portion is provided over the entire region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction, so that it stands up in a natural state. The contraction force in the longitudinal direction acting on the part acts on the entire region. Therefore, the vicinity of the end on the back side is formed in a shape (R shape) close to a clearer arc. Therefore, alignment with the center of the width direction of a diaper and the center of a wearer's body (or the center of the width direction of an absorptive pad) becomes easier.

Such an absorbent article,
The shape of the edge portion in the longitudinal direction of the absorbent core is a curved shape in which the central portion in the width direction protrudes more outward in the longitudinal direction than the end portion in the width direction. Is desirable.

  According to such an absorbent article, it becomes easy to deform | transform a back | end side edge part and a non-existing part along the shape of the edge part of the longitudinal direction of an absorbent core. Therefore, for example, by forming the end edge portion in the longitudinal direction of the absorbent core in an arc shape, the back side end portion can be easily formed in a shape close to the arc (R shape) along the shape. Therefore, alignment with the center of the width direction of a diaper and the center of a wearer's body (or the center of the width direction of an absorptive pad) becomes easier. Moreover, the area | region between a 1st solid gather and a top sheet formed in the vicinity of the 1st fixed part of a 1st solid gather and a 1st standing part can be made wide because there is no thickness of an absorptive core. Therefore, since the pocket-shaped space formed according to the said area | region becomes large, a leak can be reduced and also when using an absorptive pad, it becomes easy to insert the said pad.

Such an absorbent article,
It is desirable that at least a central region in the width direction of the absorbent core is formed with a lower basis weight than other regions of the absorbent core.

  According to such an absorbent article, by forming the central region in the width direction of the absorbent core with a low basis weight, wrinkles are likely to enter the portion with a low basis weight, and the presence region and the non-existence region of the absorbent core Since a color difference occurs in the region, the region can be used as a mark when the diaper (absorbent pad) is worn. Therefore, alignment with the center of the width direction of a diaper and the center of a wearer's body (or the center of the width direction of an absorptive pad) becomes easier.

Such an absorbent article,
The end of the main body portion on the back side in the longitudinal direction is located outside the outermost thread-like elastic member in the longitudinal direction and contracts as the thread-like elastic member contracts. It is desirable that a contraction region which is longer in the longitudinal direction than the interval between the matching thread-like elastic members is formed.

  According to such an absorbent article, when a plurality of thread-like elastic members are attracted to the inside based on the contraction force in the longitudinal direction acting on the standing part, such a contraction region is fan-shaped with respect to the thread-like elastic member. spread. Therefore, the vicinity of the end on the back side is formed in a shape (R shape) close to a clearer arc. Therefore, alignment with the center of the width direction of a diaper and the center of a wearer's body (or the center of the width direction of an absorptive pad) becomes easier. Moreover, since there is no elastic member at the end on the back side, and a soft region with low rigidity is formed widely, even if it comes into contact with the skin of the wearer, the touch is good.

Such an absorbent article,
The length of the contraction region in the longitudinal direction is preferably longer than half of the length in the longitudinal direction of the region sandwiched between the outermost thread-like elastic member and the innermost thread-like elastic member.

  According to such an absorbent article, by forming the contraction region longer, the vicinity of the back end is formed in a shape (R shape) that is closer to a clearer arc.

Such an absorbent article,
A dorsal side flap is formed on the back side of the main body so as to extend outward in the width direction from the main body, and a pair of fastening tapes are provided on both sides of the dorsal side flap in the width direction. And the pair of fastening tapes each have an engaging portion that engages with the abdomen side portion of the main body portion when the absorbent article is worn,
When a center position in the longitudinal direction at a predetermined position in the width direction of the engagement portion is a center position, a center line that connects the center positions of the pair of engagement portions along the width direction, It is desirable to pass through the non-existing portion at the center in the width direction of the absorbent article.

  According to such an absorbent article, it becomes possible to form the pocket-shaped space neatly by applying an equal tensile force to the portion where the pocket-shaped space on the back side is formed.

Such an absorbent article,
It is desirable that the fixed end be present outside in the longitudinal direction from the position through which the center line passes.

  According to such an absorbent article, it becomes easy to act on the whole non-existing part, without the tensile force of the width direction outward acting along a center line being disturbed by the highly rigid fixed part. Thereby, it becomes easier to suppress the occurrence of problems such as generation of wrinkles in the non-existing portion.

Such an absorbent article,
A straight line connecting the outer end positions of the pair of engaging portions along the width direction when the position of the outer end in the longitudinal direction at the predetermined position in the width direction of the engaging portion is defined as the outer end position. However, it is desirable that the main body portion passes through a portion where the thread-like elastic member is disposed.

  According to such an absorbent article, when the fastening tape is pulled outward in the width direction, a tensile force easily acts on the thread-like elastic member, and the thread-like elastic member is extended outward in the width direction without being loosened. Thereby, the non-existing part formed adjacent to the thread-like elastic member in the longitudinal direction can be easily extended in the width direction without slackening.

Such an absorbent article,
A straight line connecting the inner end positions of the pair of engaging portions along the width direction when the position of the inner end in the longitudinal direction at the predetermined position in the width direction of the engaging portion is set as the inner end position. However, it is desirable that the main body portion passes through a portion where the absorbent core is disposed.

  According to such an absorbent article, when the fastening tape is pulled outward in the width direction, a tensile force is easily applied to the absorbent core, and the absorbent core is extended outward in the width direction without slackening. Thereby, the non-existing part formed adjacent to the absorbent core in the longitudinal direction can be easily extended in the width direction without sagging.

Such an absorbent article,
The pair of fastening tapes have the engaging portions at a plurality of locations in the longitudinal direction,
The center line is the center position determined for the engaging portion closest to the position where the thread-like elastic member is arranged in the longitudinal direction among the plurality of engaging portions provided in the longitudinal direction. It is desirable to pass through.

  According to such an absorbent article, a plurality of pairs of engaging portions can be engaged with the target tape, and the fit of the waistline portion is improved when the diaper is worn, and the engaging portions act on each engaging portion. The power to do can be dispersed. Thereby, it can make it easy to maintain the form at the time of a diaper mounting | wearing, suppressing that an engaging part peels unintentionally at the time of mounting | wearing of a diaper.

Such an absorbent article,
It is desirable that an area that can be expanded and contracted in the width direction of the thread-like elastic member and the three-dimensional gather forming portion are overlapped and joined.

  According to such an absorbent article, as the thread-like elastic member extends outward in the width direction due to the tensile force on the outer side in the width direction, a force that opens outward in the width direction acts on the pair of three-dimensional gathers. And it is suppressed that the said three-dimensional gather falls in the width direction inner side. This makes it easier for the three-dimensional gather to stand up when the diaper is worn, and to prevent the excrement and the like from leaking out of the diaper.

Such an absorbent article,
The back side flap and the fastening tape are composed of different members,
The fastening tape is preferably joined to the widthwise outer end of the back side flap.

  According to such an absorbent article, the two sheet members constituting the back side flap and the fastening tape are overlapped in the thickness direction at the joint, thereby increasing the strength of the joint. be able to. Thereby, even when the fastening tape is pulled strongly to the left and right, it is possible to prevent the joint from being broken or peeled off.

Such an absorbent article,
Having a plurality of creases along the width direction that serve as base points when the absorbent article is folded in the longitudinal direction;
It is desirable that one of the regions where the plurality of folds are formed passes through the non-existing portion.

  According to such an absorbent article, since at least one fold of the plurality of folds is formed so as to pass through the region of the non-existing portion having low rigidity, the non-existing portion is easily creased. . Thereby, it becomes easy to fold a diaper in a longitudinal direction. Furthermore, it becomes easy to form a pocket-shaped space when the diaper is put on.

Such an absorbent article,
A pair of second solid gathers are provided along the longitudinal direction on the outer side in the width direction than the first solid gathers provided in the solid gather forming portion,
The second three-dimensional gather is arranged with the elastic member for the second three-dimensional gather in the longitudinal direction, and stands on the skin side in the thickness direction with the second base end portion that cannot stand up and the second base end portion serving as a fulcrum. Possible second uprights side by side in the width direction,
A second fixing portion that fixes the end portion in a state of being overlapped with the main body portion is formed at the end portion in the longitudinal direction of the second upright portion,
The fixing portion exists outside the absorbent core in the longitudinal direction,
It is desirable that the second fixing portion is spaced apart from the expansion / contraction region of the thread-like elastic member across the fixing portion in the width direction.

  According to such an absorbent article, the region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction and inside the fixing portion (expansion and contraction of the thread-like elastic member) Since the region) and the first three-dimensional gather overlap, the contraction force by the three-dimensional gather elastic member is interlocked at the fixed portion, and the thread-like elastic member and the three-dimensional gather elastic member continuously contract. On the other hand, since the second fixing portion is spaced apart from the expansion / contraction region of the thread-like elastic member across the fixing portion, the contraction force of the thread-like elastic member and the contraction force of the second elastic member are not interlocked. Therefore, it is possible to provide a region where the contraction in the width direction hardly occurs in the second fixing portion. Since the material is almost extended in the region where shrinkage is unlikely to occur, it is difficult for wrinkles to be formed on the entire back side, and furthermore, only the central region on the back side sinks inward in the longitudinal direction due to the contraction force of the first three-dimensional gather. The center in the width direction can be more easily determined with reference to these regions on the left and right sides. In addition, the back side flap is difficult to enter under the body and it is easy to pull it outward in the width direction, so it is possible to wear the product by extending the heel formed under the wearer's body, so it fits the body Also improves. Moreover, when the wrinkle is stretched, the pad can be easily inserted when using the absorbent pad as auxiliary absorption.

=== Embodiment ===
<Diaper configuration>
FIG. 1 is a schematic plan view of a developed state (described later) of an adult diaper 1 as an absorbent article according to an embodiment. 2A, FIG. 2B, and FIG. 2C are an AA sectional view, a BB sectional view, and a CC sectional view in FIG. 1, respectively. 2A to 2C, only one side in the width direction is shown for the sake of space. FIG. 3 is a schematic perspective view of the diaper 1 in a worn state, and FIG. 4 is a schematic plan view showing the back side portion 1b of the diaper 1 in an enlarged manner. FIG. 5 is a schematic cross-sectional view showing how the pocket-shaped space SP is formed in the main body 1k based on the contraction force of the first three-dimensional gather 41g1 (details will be described later).

  As shown in FIG. 1, the "deployed state" means that the fastening of each fastening tape 61 to the target tape 65 is released, and the abdomen 1a, the crotch 1m, and the back 1b are arranged in the longitudinal direction. The first standing portion 41 s 1 is contracted based on the first three-dimensional gather elastic member 451, the second standing portion 41 s 2 is contracted based on the second three-dimensional gather elastic member 452, and the back side based on the waist elastic member 71 is set. This is a state in which the diaper 1 is extended in both the longitudinal direction and the width direction until the contraction of the end 1 kbeL and the contraction of the rec flap 1mf based on the leg elastic member 81 are eliminated.

  The diaper 1 is an unfolded diaper worn by a wearer. The diaper 1 has a longitudinal direction, a width direction, and a thickness direction as three directions orthogonal to each other. The diaper 1 has an abdominal side part 1a, a crotch part 1m, and a back side part 1b arranged in the longitudinal direction in this order. In the wearing state of FIG. 3, the abdomen side portion 1 a covers the abdomen side of the wearer, the crotch portion 1 m covers the crotch portion of the wearer, and the back side portion 1 b covers the back side of the wearer.

  In the unfolded state of FIG. 1, the abdominal part 1a and the dorsal part 1b each extend outward in the width direction from the crotch part 1m. That is, the outer shape of the diaper 1 viewed from the thickness direction has a substantially hourglass shape in plan view. Each part of the ventral part 1a that extends outward in the width direction from the main body part 1k is referred to as “abdominal side flap 1asf”, and each of the back side part 1b that extends outward from the main body part 1k in the width direction. The portion is referred to as “back side flap 1bsf”. Hereinafter, one side in the thickness direction is referred to as “skin side”, and the other side is referred to as “non-skin side”. FIG. 1 shows the diaper 1 as seen from the skin side.

  The diaper 1 has the sheet-like main-body part 1k, as shown in FIG.1, FIG.2B and FIG.2C. The main body 1k according to the present embodiment includes an absorbent core 11 that absorbs excreted fluid such as urine, a top sheet 21 that covers the absorbent core 11 from the skin side in the thickness direction, and the absorbent core 11 that is on the non-skin side. A leak-proof sheet 30 that covers the diaper 1 and covers the absorbent core 11 from the non-skin side of the leak-proof sheet 30.

  Furthermore, a three-dimensional gather sheet 47 for forming the second three-dimensional gather 41g2, a fastening tape 61, a target tape 65, a waistline elastic member 71, a leg-hole elastic member 81, and the like are provided on the main body 1k, and a diaper 1 has been completed.

  In addition, the longitudinal direction, the width direction, and the thickness direction of the main body 1k face the same direction as the longitudinal direction, the width direction, and the thickness direction of the diaper 1, respectively. Therefore, in the following description, these directions are used without distinction between the diaper 1 and the main body 1k.

  Hereinafter, the detail of each structure of the diaper 1 is demonstrated, referring drawings.

  The absorptive core 11 exists in the inner part of the longitudinal direction in the main-body part 1k rather than the edge part 1kbeL of the back side (FIG. 1). The absorbent core 11 is formed by molding liquid absorbent fibers such as pulp fibers and liquid absorbent granular materials such as super absorbent polymer (SAP) into a substantially hourglass shape in plan view as an example of a predetermined shape. The absorbent core 11 is covered with a liquid-permeable core wrap sheet 12 from both the skin side and the non-skin side in the thickness direction (FIG. 2B). Examples of suitable materials for the core wrap sheet 12 include tissue paper and nonwoven fabric. However, the core wrap sheet 12 is not an essential configuration.

  The top sheet 21 is a flexible and liquid-permeable rectangular sheet that covers the absorbent core 11 from the skin side (FIGS. 1, 2B, and 2C). In this embodiment, since the skin side surface of the absorbent core 11 is covered with the core wrap sheet 12, the top sheet 21 covers the core wrap sheet 12 from the skin side while hot melt adhesive or the like is applied to the core wrap sheet 12. It is fixed with. In addition, the top sheet 21 has substantially the same size as the absorbent core 11 in the width direction so as to cover substantially the entire skin side surface of the absorbent core 11 and protrudes from both sides of the absorbent core 11 in the longitudinal direction. It has a size. In the present embodiment, the top sheet 21 is provided over the entire length of the diaper 1 in the longitudinal direction (FIG. 1). The material suitable for the top sheet 21 can be exemplified by an air-through nonwoven fabric, but is not limited thereto as long as it has liquid permeability and flexibility. The top sheet 21 according to the present embodiment constitutes a first three-dimensional gather 41g1 (details will be described later).

  The leak-proof sheet 30 is a flexible and liquid-impermeable rectangular sheet that covers the absorbent core 11 from the non-skin side (FIGS. 1, 2B, and 2C). The leak-proof sheet 30 in the present embodiment is fixed to the core wrap sheet 12 with a hot melt adhesive or the like while covering the core wrap sheet 12 from the non-skin side. Moreover, the leak-proof sheet 30 has a planar dimension that protrudes from the absorbent core 11 to both sides in the width direction and both sides in the longitudinal direction so as to cover almost the entire area of the non-skin side surface of the absorbent core 11. In the present embodiment, the leak-proof sheet 30 is provided over the entire length of the diaper 1 in the longitudinal direction (FIG. 1). And the part which protrudes from the absorptive core 11 and the core wrap sheet | seat 12 in a longitudinal direction or the width direction among the leak-proof sheets 30 is being fixed with the hot melt adhesive etc. with respect to the top sheet 21 or the solid gather sheet 47. . A material suitable for the leak-proof sheet 30 can be exemplified by a polyethylene film, but is not limited thereto as long as it has liquid impermeability and flexibility.

  The exterior sheet 31 is a sheet that forms an exterior of the diaper 1 (FIGS. 1, 2B, and 2C). The exterior sheet 31 is fixed to the same surface with a hot melt adhesive or the like while covering the non-skin side surface of the leak-proof sheet 30. The exterior sheet 31 in the present embodiment is the outer shape of the diaper 1. Therefore, the planar shape of the exterior sheet 31 is a substantially hourglass shape (FIG. 1). The exterior sheet 31 protrudes from the leak-proof sheet 30 to both sides in the width direction. The protruding portion is fixed to the three-dimensional gather sheet 47 with a hot melt adhesive or the like. A material suitable for the exterior sheet 31 may be an SMS (spunbond-meltblown-spunbond) nonwoven fabric, but is not limited thereto as long as it has flexibility. In addition, when the exterior sheet 31 is formed of a liquid-impermeable sheet, the leak-proof sheet 30 can be omitted.

  Two solid gathers are provided for each end 11ew in the width direction of the absorbent core 11 (FIGS. 1, 2B, and 2C). Of the two-dimensional gathers provided at each of the end portions 11ew in the width direction of the absorbent core 11, the three-dimensional gather located inside the width direction is referred to as a “first three-dimensional gather 41g1”. A solid gather located outside the width direction 41g1 is referred to as a “second solid gather 41g2”.

  As shown in FIG. 2B, the first three-dimensional gather 41g1 is formed by folding the end portion 21ew in the width direction of the top sheet 21 inward in the width direction. That is, the end portion 21ew (the folded portion) is the first upright portion 41s1. The first standing portion 41s1 can stand on the skin side in the thickness direction with the fold line L related to folding as a fulcrum. The portion of the fold line L is a first base end portion 41k1 that cannot stand up. The first base end portion 41k1 and the first upright portion 41s1 are provided side by side in the width direction. For example, one 940DTEX thread rubber is naturally provided in the longitudinal direction as the first three-dimensional gather elastic member 451 along the longitudinal direction at the distal end portion 41ew1 (end portion 21ew) in the width direction of the first upright portion 41s1. It is fixed with a hot melt adhesive or the like in an elongated state 2.5 times longer. By the rubber thread, a contraction force is applied to the first upright portion 41s1 in the longitudinal direction. Based on the contraction force, the first upright portion 41s1 contracts in the longitudinal direction, so that the first upright portion 41s1 rises on the skin side in the thickness direction while forming a plurality of wrinkles, thereby forming a first three-dimensional gather 41g1. It works (FIG. 2B). In the present embodiment, the first three-dimensional gather elastic member 451 is provided on the inner side in the longitudinal direction from the abdomen end 1 kaeL and the dorsal end 1 kbeL. In the present embodiment, the vicinity of the end portion 21ew in the width direction of the top sheet 21 corresponds to a “three-dimensional gather forming portion”. That is, the main body 1k is provided with two three-dimensional gather forming portions spaced in the width direction along the longitudinal direction. The first base end portion 41k1 corresponds to a “base end portion”. The first standing portion 41s1 corresponds to a “standing portion”. The first three-dimensional gather elastic member 451 corresponds to a “three-dimensional gather elastic member”.

  The magnitude of the contraction force of the first three-dimensional gather elastic member 451 is set as follows, for example. First, the total length in the longitudinal direction of the first upright portion 41s1 before the first three-dimensional gathered elastic member 451 is provided (in the absence of wrinkles) is defined as a reference length of 100%. When the first standing portion 41s1 provided with the first three-dimensional gather elastic member 451 and contracted in the longitudinal direction is expanded to 93% in the longitudinal direction, the first three-dimensional gather elastic member 451 has 0.5N to 2N. The expansion state of the elastic member 451 for the first three-dimensional gathers when being fixed to the first upright portion 41s1 is determined so that the contraction force is generated. For example, in this example, one rubber thread of 940DTEX is used. Therefore, by setting the stretched state in the longitudinal direction of the single rubber thread to twice the natural length and fixing it to the first upright portion 41s1, the magnitude of the contraction force of the rubber thread when extending 93% is reduced to 0. .5N to 2N.

  As shown in FIGS. 1, 2A, and 2C, the end portions 41s1eLa and 41s1eLb in the longitudinal direction of the first upright portion 41s1 are provided with the respective end portions 41s1eLa and 41s1eLb in the top sheet 21 (main body portion 1k). First fixing portions 42a1 and 42b1 that are fixed in a state where they are overlapped with each other are formed in a band shape along the longitudinal direction. That is, between the part corresponding to 1st fixing | fixed part 42a1 and 42b1 in edge part 41s1eLa and 41s1eLb, and the inner part of the width direction rather than said folding line L among the top sheets 21, it is 1st fixing | fixed part. 42a1 and 42b1 are provided with a hot melt adhesive or the like in a band shape along the longitudinal direction, and the end portions 41s1eLa and 41s1eLb are fixed to the top sheet 21 in a state of being overlapped by the adhesive.

  Moreover, as shown in FIG. 4 etc., innermost part 42b1p which is the innermost part of the 1st fixing | fixed part 42b1 located in the back side part 1b in the longitudinal direction is the waist part elastic member 71 and the absorptive core 11 in the main-body part 1k. Is located in a non-existing portion 1 kbn (indicated by a dot pattern in FIG. 4). The non-existing portion 1 kbn is a region between the back end 1 kbeL (the waistline elastic member 71 located at the innermost side in the longitudinal direction) and the absorbent core 11, and has a lower rigidity than the other regions. . The back end 1 kbeL is a region located on the outer side in the longitudinal direction from the position of the waistline elastic member 71 located on the innermost side in the longitudinal direction in the main body 1 k. The dimension in the longitudinal direction of the end portion 1 kbeL on the back side is selected from a range of 20 mm to 40 mm, for example, in the unfolded state of the diaper 1 as shown in FIG. The first fixing portion 42b1 corresponds to a “fixing portion”. The innermost part 42b1p corresponds to a “fixed end”.

  The contractive force of the first three-dimensional gathering elastic member 451 related to the first upright portion 41s1 is input to the innermost portion 42b1p of the first fixed portion 42b1 in the form of a pulling force F that faces inward in the longitudinal direction. Therefore, as shown in FIG. 5, the main body 1k is pulled inward in the longitudinal direction via the innermost portion 42b1p. Accordingly, the main body 1k is bent into a substantially Z shape in cross section in the non-existing portion 1kbn while suppressing the rising of the back end 1kbeL, and between the back end 1kbeL and the absorbent core 11 is suppressed. A pocket-shaped space SP can be formed at the position. The “rising of the back end 1 kbeL” means a state where the back end 1 kbeL rises with respect to the main body 1 k. For example, in FIG. 5, the back end 1 kbeL stands up to the right side of the drawing with respect to the main body 1 k.

  Here, as shown in FIG. 4, the innermost portion 42b1p according to the present embodiment is located inside the longitudinal center position C1kbnL in the non-existing portion 1kbn. Therefore, since the pulling force F directed inward in the longitudinal direction can be input to a position further away from the back end 1 kbeL, the rising of the back end 1 kbeL can be further suppressed, and the wearing Sometimes the back end 1 kbeL is not easily bent inward, and the surface shape can be maintained, so that it can be fitted to the wearer's back.

  In FIG. 4, the first fixing portion 42b1 is formed at a position inside the width direction with respect to the center position C41sw in the width direction of the first standing portion 41s1. Thereby, in the area | region 41seLb where the 1st standing part 41s1 and the back end 1kbeL overlap, the 1st standing part 41s1 can be fixed reliably. However, you may form the 1st fixing | fixed part 42b1 on the outer side of the width direction rather than center position C41sw.

  Furthermore, in the present embodiment, two auxiliary fixing portions 43b are provided side by side in the width direction at a position between the first fixing portion 42b1 and the first base end portion 41k1 in the width direction (FIG. 4). The auxiliary fixing portion 43b assists the fixing by the first fixing portion 42b1. The auxiliary fixing portion 43b crushes a gap between the first upright portion 41s1 and the back side end portion 1kbeL (top seat 21) that may be generated at a position between the first fixing portion 42b1 and the first base end portion 41k1. Therefore, urine leakage from the region 41seLb can be effectively prevented. However, the auxiliary fixing portion 43b is not an essential configuration.

  The auxiliary fixing portion 43b is formed of a hot melt adhesive or the like. That is, a hot melt adhesive or the like is inserted in a band shape along the longitudinal direction between the first upright portion 41s1 and the back end portion 1 kbeL (top sheet 21). As a result, the first standing portion 41s1 and the back end portion 1kbeL (top sheet 21) are also fixed at a position between the first fixing portion 42b1 and the first base end portion 41k1 in the width direction.

  In this embodiment, the dimension in the width direction of the auxiliary fixing portion 43b is smaller than the dimension in the width direction of the first fixing portion 42b1, and the innermost portion of the auxiliary fixing portion 43b, which is the innermost portion in the longitudinal direction. The position in the longitudinal direction of the inner portion 43bp is substantially the same as the position of the innermost portion 42b1p of the first fixing portion 42b1, but is not limited thereto. That is, you may make the dimension of the width direction of the auxiliary | assistant fixing | fixed part 43b larger than the 1st fixing | fixed part 42b1. Further, the position in the longitudinal direction of the innermost portion 43bp of the auxiliary fixing portion 43b may be set outside or inside the position in the longitudinal direction of the innermost portion 42b1p of the first fixing portion 42b1. However, in any case, it is desirable that the innermost portion 43bp of the auxiliary fixing portion 43b is positioned at the non-existing portion 1 kbn. By configuring in this way, the pulling force F directed inward in the longitudinal direction based on the contraction force can be efficiently input to the non-existing portion 1 kbn, so that the rising of the back end 1 kbeL can be suppressed.

  On the other hand, as shown in FIGS. 1 and 2B, the second three-dimensional gather 41g2 is formed of a three-dimensional gather sheet 47 (corresponding to a second three-dimensional gather forming portion) that is a separate member from the top sheet 21. The three-dimensional gather sheet 47 is provided so as to cover the first base end portion 41k1 from the skin side in the thickness direction while being arranged so as to straddle the first base end portion 41k1 related to the first three-dimensional gather 41g1. . The three-dimensional gather sheet 47 is fixed to the top sheet 21 with a hot melt adhesive or the like at or near the first base end portion 41k1, and the fixed portion becomes the second base end portion 41k2 that cannot stand up. Yes. Further, a portion of the three-dimensional gather sheet 47 that is folded back outward in the width direction from the second base end portion 41k2 is a second upright portion 41s2 that can stand up with the second base end portion 41k2 as a fulcrum. For example, one 940DTEX thread rubber is 2.5 times the natural length in the longitudinal direction as the second three-dimensional gather elastic member 452 in the longitudinal direction at the distal end of the second upright portion 41s2. It is fixed with a hot melt adhesive or the like in the stretched state. Therefore, a contraction force is applied to the second standing portion 41s2 in the longitudinal direction, and the second standing portion 41s2 contracts in the longitudinal direction based on the contracting force, so that the second standing portion 41s2 has a plurality of wrinkles. While forming, it stands up on the skin side in the thickness direction and functions as the second three-dimensional gather 41g2 (FIG. 2B). In the present embodiment, the second three-dimensional gather elastic member 452 is provided on the inner side in the longitudinal direction from the abdominal end 1kaeL and the dorsal end 1kbeL. A suitable material for the three-dimensional gather sheet 47 can be an appropriate nonwoven fabric, and an SMS nonwoven fabric is used here. However, the material is not limited to this as long as it has flexibility.

  Further, as shown in FIGS. 1 and 2A to 2C, the three-dimensional gather sheet 47 extends to the outer side in the width direction up to substantially the same position as the outer edge 31ew of the exterior sheet 31. At 31 ew or in the vicinity thereof, it is bonded to the exterior sheet 31 with a hot melt adhesive or the like. As a result, the three-dimensional gather sheet 47 and the exterior sheet 31 cooperate with each other to form the abdomen side flap 1asf at the abdomen side portion 1a and the back side side flap 1bsf at the back side portion 1b. On the other hand, also in the crotch part 1m, similarly, the three-dimensional gather sheet 47 and the exterior sheet 31 are bonded and integrated with a hot melt adhesive or the like at or near the outer edge 31ew. As a result, the leg flap 1mf is formed from the outer end edge 31ew over a predetermined range in the width direction.

  The leg flap 1mf is a portion (a portion covering the wearer's leg) that becomes the leg opening HL in the mounted state. In order to form leg gathers by contracting the leg flaps 1mf in the longitudinal direction, the leg flaps 1mf have a plurality of rubber threads along the longitudinal direction as the leg-hole elastic members 81 in a state of being elongated in the longitudinal direction, hot melt adhesive, etc. It is fixed by. When the stretched state of the leg elastic member 81 is relaxed, the leg flap 1mf contracts in the longitudinal direction to form a plurality of ridges, and the ridges function as leg gathers.

  As shown in FIG. 2B, the second upright portion 41 s 2 is different from the first upright portion 41 s 1, and is in an outwardly opened state folded outward in the width direction with the second base end portion 41 k 2 or the vicinity thereof as the folding position. It has become. In order to fix in the outwardly opened state, second end portions 41s2eLa and 41s2eLb in the longitudinal direction of the second upright portion 41s2 have second fixing portions 42a2 and 42b2 that fix the end portions overlapped with the main body portion 1k. , Formed in a strip shape along the longitudinal direction (FIGS. 1, 2A, and 2C). The second fixing portions 42a2 and 42b2 are formed of a hot melt adhesive or the like.

  Specifically, as shown in FIGS. 2A and 2C, the second upright portion 41s2 folded back in the width direction is a portion 47p in the width direction outside the second base end portion 41k2 in the three-dimensional gather sheet 47. The outer portion 47p is fixed to the main body 1k with a hot melt adhesive or the like, and is a part of the main body 1k. And the 2nd upright part 41s2 is piled up on the part 47p of such a three-dimensional gather sheet | seat 47 in the state folded by the outer side of the width direction. A hot melt adhesive or the like as the second fixing portions 42a2 and 42b2 is interposed between the second upright portion 41s2 in the overlapped state and the portion 47p of the three-dimensional gather sheet 47. As a result, the second upright portion 41s2 and the portion 47p are fixed to each end portion 41s2eLa, 41s2eLb in the longitudinal direction by a hot melt adhesive or the like.

  Here, as shown in FIG. 4, the second fixing part 42b2 located on the back side part 1b also has an innermost part 42b2p, which is the innermost part in the longitudinal direction, of the non-existing part 1kbn (dot pattern in FIG. 4). It is desirable to be located in

  In this case, the contractive force of the second three-dimensional gather elastic member 452 related to the second upright portion 41s2 is input to the innermost portion 42bp2 in the form of a pulling force F2 facing inward in the longitudinal direction. Therefore, it is possible to contribute to the formation of the pocket-shaped space SP (FIG. 5) at the position between the back end 1 kbeL and the absorbent core 11 while suppressing the rise of the back end 1 kbeL. . In addition, the magnitude | size of the contraction force of the elastic member 452 for 2nd three-dimensional gathers is set by the method similar to the elastic member 451 for 1st three-dimensional gathers, for example.

  In FIG. 4, the innermost portion 42b2p of the second fixing portion 42b2 is located on the inner side in the longitudinal direction and the outer side in the width direction with respect to the innermost portion 42b1p of the first fixing portion 42b1.

  Therefore, the innermost part 42b2p and the innermost part 42b1p can each ride on a substantially arc-shaped curve that bulges outward in the longitudinal direction. The innermost part 42b2p and the innermost part 42b1p bend the main body 1k into a substantially Z shape in cross-section at each position, thereby forming the shape of the pocket-shaped space SP into a substantially arc shape in plan view. Can do. As a result, it is possible to improve the fit to the heel part, which is generally arcuate, and more effectively prevent urine leakage.

  From the viewpoint of creating a substantially arc shape, the contraction force applied from the second solid gathering elastic member 452 to the second upright portion 41s2 is the first solid gathering elastic member 451 to the first. It is desirable that the contraction force applied to the upright portion 41s1 is larger than the contraction force. In other words, the contraction force generated in the second three-dimensional gather elastic member 452 when the second upright portion 41s2 extends 93% is greater in the first three-dimensional gather elastic member when the first stand up portion 41s1 extends 93%. It may be larger than the magnitude of the contraction force generated in 451.

  In this case, a tensile force F2 larger than the tensile force F directed inward in the longitudinal direction input to the innermost portion 42b1p is input to the innermost portion 42b2p. As a result, the innermost part 42b2p moves while being pulled more greatly inward in the longitudinal direction than the innermost part 42b1p. The innermost part 42b2p is located on the outer side in the width direction and on the inner side in the longitudinal direction than the innermost part 42b1p. Therefore, according to the magnitude relationship (F <F2) between the pulling forces F and F2, the central portion in the width direction in the space SP is urged to have a substantially arc shape that protrudes outward in the longitudinal direction. As a result, the magnitude relationship contributes effectively to making the space SP conform to the shape of the buttock.

  As shown in FIGS. 1 and 2A, the fastening tape 61 is provided at each outer end in the width direction of the pair of back side flaps 1bsf. The fastening tape 61 uses a flexible substantially rectangular sheet as a tape base 61a, one end in the width direction of the tape base 61a is fixed to the outer end of the back side flap 1bsf, and the other end is the back side flap 1bsf. It protrudes to the outer side in the width direction from the outer end portion. At the other end, two portions in the longitudinal direction protrude further outward in the width direction, and the male material 61m of the hook-and-loop fastener is fixed to the skin side surface of the two protruding portions 61ap one by one. Yes. A plurality of locking projections (not shown) are provided on the skin side surface of the male material 61m. The fastening tape 61 is locked to the target tape 65 when the locking protrusion of the male material 61m is caught on the non-skin side surface of the target tape 65 of the abdominal side 1a. As the male member 61m, a well-known hook fastener (such as a hook having a hook shape or a T shape) can be appropriately used. Moreover, although the material suitable for the tape base material 61a can illustrate flexible sheet materials, such as a nonwoven fabric, it is not restricted to this. The male material 61m corresponds to an “engagement portion”.

  As shown in FIGS. 1 and 2C, the target tape 65 is provided on the non-skin side surface of the exterior sheet 31 that is the non-skin side surface of the abdominal side portion 1a. The target tape 65 has a substantially rectangular shape that is long in the width direction, and is fixed to the exterior sheet 31 with a hot melt adhesive or the like while aligning the center position in the width direction with the exterior sheet 31. Examples of suitable materials for the target tape 65 include a film on which a female material is disposed, an air-through nonwoven fabric, and the like, but are not limited thereto. Moreover, even if it does not use a target tape, you may use what the protrusion for latching easily catches on the exterior sheet | seat 31 itself.

  By fastening each fastening tape 61 to the target tape 65, as shown in FIG. 3, a waist opening HB and a pair of leg openings HL, HL are formed, and the diaper 1 is worn by the wearer. The

  As shown in FIG. 4, the waistline elastic member 71 applies a contraction force in the width direction to the back end 1 kbeL so that the waistline opening HB in the backside part 1 b can be expanded and contracted in the width direction. It is a member. The size in the width direction of the waistline elastic member 71 provided at the end 1 kbeL on the back side is selected from, for example, 180 mm to 220 mm in the deployed state.

  A plurality of thread-like elastic members along the width direction are provided in the longitudinal direction as the waistline elastic member 71 at the back end 1 kbeL. In the present embodiment, as an example of the thread-like elastic member, five 940DTEX thread rubbers 71a to 71e are arranged so as to extend along the width direction. Each thread rubber is inserted between the top sheet 21 and the leak-proof sheet 30 in an extended state of, for example, twice the natural length in the width direction, and at least one sheet (the top sheet 21 or the leak-proof sheet 30). It is fixed with hot melt adhesive or the like. Therefore, if the stretched state is relaxed to the natural state, the back end 1 kbeL contracts in the width direction, and a plurality of ridges are formed. As a result, each rubber thread can be quickly expanded in the width direction until the heel is fully extended, and the waistline opening HB can be expanded and contracted in the width direction.

  For example, the contraction force of the waistline elastic member 71 is set as follows. First, the total length dimension in the width direction of the end 1 kbeL on the back side before the waistline elastic member 71 is provided (in a state where there is no wrinkle) is defined as a reference length of 100%. Then, when the back end 1 kbeL provided with the waistline elastic member 71 and contracted in the width direction is expanded to 93% in the width direction, a contraction force of 2N to 8N in total is generated in the waistline elastic member 71. The stretched state of the waistline elastic member 71 when it is fixed to the back end 1 kbeL is determined. For example, in this embodiment, by setting the stretched state in the longitudinal direction of the five thread rubbers 71a to 71e to twice the natural length and fixing to the back end 1 kbeL, the five stretched at 93% The total value of the contraction force of the thread rubbers 71a to 71e is stored in 2N to 8N.

  In addition, as shown in FIG. 4, the shape of the edge part 11eb on the back side in the longitudinal direction of the absorbent core 11 is such that the central part 11ebc in the width direction is longer than the end part 11eb in the width direction. It has a curved shape protruding outward in the direction (back side) (that is, the end edge portion 11eb is formed in an arc shape).

  If it becomes like this, the shape of the pocket-shaped space SP when it sees from the skin side of the thickness direction can be made into a curved shape. That is, since the rigidity of the absorbent core 11 is generally high, when the non-existing portion 1 kbn is pulled by the pulling force F directed inward in the longitudinal direction, the vicinity of the back side end portion 1 kbeL (the back side end portion) 1 kbeL and non-existing portion 1 kbn) are easily bent along the end edge 11 eb at a position adjacent to the end edge 11 eb of the absorbent core 11. Further, since the shape of the end edge portion 11eb is a curved shape, the vicinity of the back end portion 1 kbeL can be bent along the curved shape, and the pocket-shaped space SP can be formed into a curved shape. On the other hand, this curved shape is also a shape that follows the shape of the collar portion that is generally substantially arc-shaped. Therefore, the pocket-shaped space SP can be provided along the buttocks, and urine / feces leakage can be more effectively prevented through improved fit to the buttocks.

  Incidentally, when the shape of the end edge portion 11eb on the back side in the longitudinal direction of the absorbent core 11 is curved, the size in the longitudinal direction of the non-existing portion 1kbn adjacent to the end edge portion 11eb is set in the width direction. Although it changes according to the position, including such a case, the size of the non-existing portion 1 kbn in the longitudinal direction is preferably set in the following range. That is, at the position P1kbn1 having the smallest size in the longitudinal direction (in FIG. 4, the central position P1kbn1 in the width direction), for example, an arbitrary value in the range of 10 mm to 40 mm is set, and the position P1kbn2 having the largest size in the longitudinal direction ( FIG. 4 may be an arbitrary value in the range of 20 mm to 50 mm in the position P1 kbn2) of the edge in the width direction of the absorbent core 11. If it is set in such a range, the size of the pocket-shaped space SP can be made a size suitable for damming the urine flowing to the back side. For example, when it is larger than the above range, the pocket-shaped space SP is easily crushed and difficult to function as a weir. On the other hand, when it is smaller than the above range, the height of the pocket-shaped space SP in the thickness direction is reduced. , And in this case, it becomes difficult to function as a weir.

<Diapers in the natural state>
FIG. 6 is an enlarged schematic plan view (plan view seen from the skin side) showing the back side portion 1b of the diaper 1 according to the present embodiment in a natural state. “Natural state” means a state in which the diaper is naturally expanded (a state in which no force is applied from the outside). In the natural state, there is a portion where wrinkles are generated (for example, the back end 1 kbeL), but the description of wrinkles is omitted in FIG. 6.

  As is clear from FIG. 6, in the natural state, in the vicinity of the back end 1 kbeL (the non-existing portion in which both the back end 1 kbeL and the waistline elastic member 71 and the absorbent core 11 drawn inward are not present) 1 kbn) is formed in a shape close to an arc.

  Specifically, the first fixing portion 42b1 is disposed on the entire longitudinal direction of the region sandwiched between the innermost thread-like elastic member (thread rubber 71a) and the outermost thread-like elastic member (thread rubber 71e) in the longitudinal direction. It is provided across. In this case, in the natural state, the contraction force (tensile force F) in the longitudinal direction acting on the first upright portion 41s1 acts on the entire region, and a plurality of thread-like elastic members (thread rubber 71a to thread rubber 71e) are inward. Gravitate. Therefore, the end 1 kbeL on the back side is formed in a shape (R shape) close to an arc (FIG. 6).

  The fixed end (innermost portion 42b1p) of the first fixed portion 42b1 is located in the non-existing portion 1kbn where neither the waistline elastic member 71 nor the absorbent core 11 exists. In this case, in the natural state, the nonexistent portion 1 kbn having lower rigidity than the other regions is attracted to the inside based on the contraction force in the longitudinal direction acting on the first upright portion 41 s 1. A non-existing portion 1 kbn (indicated by hatching in FIG. 6) drawn to the inside and the back end 1 kbeL combine to form a shape (R shape) closer to an arc.

  Thus, the center position (center) in the width direction of the diaper 1 can be easily understood by forming the vicinity of the back end 1 kbeL in a shape close to an arc. Therefore, it becomes easy to arrange | position the center of the width direction of the diaper 1 with respect to the center of a wearer's body. Generally, since the unfolded diaper 1 is laid under the wearer's body (back side), it is particularly easy to align the center of the wearer's back side with the center of the diaper 1 in the width direction.

  Further, in the present embodiment, as shown in FIG. 6, the back end 1 kbeL is located outside the outermost thread-like elastic member (thread rubber 71 e) in the longitudinal direction, and the thread-like elastic member (the waistline elastic member) The contraction area | region CE which contracts with the contraction of 71) is formed. The contraction region CE contracts in the width direction. The contraction region CE is longer in the longitudinal direction than the interval between the adjacent thread-like elastic members (for example, the thread rubber 71a and the thread rubber 71b). In the present embodiment, the intervals between adjacent rubber threads are all equal.

  Here, when a plurality of thread-like elastic members (trunk waist elastic member 71) are drawn inward based on the contraction force in the longitudinal direction acting on the first upright portion 41s1, the shrink region CE is the thread-like elastic member (trunk waist elastic member 71). ) In the width direction. Accordingly, the vicinity of the back end 1 kbeL is formed in a shape (R shape) close to a clearer arc. Therefore, alignment with the center of the width direction of the diaper 1 and the center of a wearer's body becomes easier.

  Moreover, in this embodiment, as mentioned above, the edge part 11eb of the longitudinal direction of the absorptive core 11 is formed in circular arc shape, and the shape of the edge part 1kbeL of the back | dorsal side is a shape close | similar to circular arc along the shape. It becomes easy to form (R shape). Therefore, alignment with the center of the width direction of a diaper and the center of a wearer's body (back side) (or the center of the width direction of an absorptive pad) becomes easier.

  The first fixing portion 42b1 does not have to be provided over the entire longitudinal direction of the region sandwiched between the thread rubber 71a and the thread rubber 71e. It suffices that at least a part of the first fixing portion 42b1 extends over the region. Further, the first fixing portion 42b1 may be provided continuously up to the first base end portion 41k1 in the width direction (for example, the first fixing portion 42b1 wider in the width direction than FIG. 1 and the like may be formed). In addition, the first fixing portion 42b1 including the auxiliary fixing portion 43b described above may be used.

  The length of the contraction region CE in the longitudinal direction is half the length in the longitudinal direction of the region sandwiched between the outermost thread-like elastic member (thread rubber 71e) and the innermost thread-like elastic member (thread rubber 71a). May be longer. For example, the contraction region CE is formed to be longer than half of the length of the thread rubber 71a to the thread rubber 71c.

  Moreover, by forming the waistline elastic member 71 with a thread-like elastic member, it becomes easy to deform in the longitudinal direction. Furthermore, by providing a plurality of thread-like elastic members, it is possible to adhere with a constant pressure without applying local pressure to the wearer's back during wearing. Therefore, the burden on the wearer is small and after-leakage can be prevented.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  The innermost part 42b2p of the second fixing part 42b2 may not be located in the non-existing part 1 kbn. For example, the innermost portion 42b2p may be located on the inner side in the longitudinal direction than the non-existing portion 1kbn. In the example of FIG. 7, the innermost portion 42 b 2 p is located at the end edge 11 eb on the back side of the absorbent core 11. Even in this case, since the innermost portion 42b2p is located in the vicinity of the non-existing portion 1kbn, it can contribute to the formation of the pocket-shaped space SP.

  As shown by a two-dot chain line in FIG. 7, a flexible sheet-like member 73 such as a nonwoven fabric or a film is provided so as to cover the waistline elastic member 71 from one side or both sides of the skin side and non-skin side in the thickness direction. Also good.

  As shown in FIG. 8, when the first three-dimensional gather elastic member 451 extends across the non-existing portion 1 kbn and the back end 1 kbeL, the first three-dimensional gather elastic member 451. Of these, it is desirable that the contraction force in the longitudinal direction is not generated in the portion 451p1 located at the back end 1kbeL. Further, it is desirable that the contraction force is not generated in the portion 451p2 positioned in the non-existing portion 1kbn in the elastic member 451 for the first three-dimensional gather. In addition to the above, it is desirable that the first three-dimensional gather elastic member 451 has a portion where no contraction force is generated on the inner side in the longitudinal direction starting from the position of the innermost portion 42b1p of the first fixing portion 42b1. According to each of these configurations, it is possible to more effectively suppress the rise of the back end 1 kbeL.

  Furthermore, as shown in FIG. 9, when the core wrap sheet 12 protrudes outward in the longitudinal direction from the absorbent core 11, the innermost portion 42b1p of the first fixing portion 42b1 is the core of the non-existing portion 1kbn. It is desirable that the wrap sheet 12 is located in a portion where it does not exist. In this case, the innermost portion 42b1p is located in a portion where the core wrap sheet 12 is not present, that is, the bending rigidity is further lower. Thereby, based on the input to the innermost portion 42b1p of the pulling force F directed inward in the longitudinal direction, the main body 1k is more quickly bent into a substantially Z shape in cross section in the non-existing portion 1kbn, and the non-existing portion A pocket-shaped space SP can be more reliably formed in 1 kbn.

  In the embodiment, the configuration having two different three-dimensional gathers (the first three-dimensional gather 41g1 and the second three-dimensional gather 41g2) is described, but the present invention is not limited to this. For example, a configuration having only the first solid gather 41g1 (a configuration not having the second solid gather 41g2) may be used. In the embodiment, the first three-dimensional gather 41g1 (first upright portion 41s1) is formed by using the end portions 21ew and 21ew in the width direction of the top sheet 21, but the configuration of the first three-dimensional gather 41g1 is this. Not limited to. For example, the first standing portion 41s1 of the first three-dimensional gather 41g1 may be formed by a dedicated three-dimensional gather sheet in the same manner as the second standing portion 41s2 of the second three-dimensional gather 41g2 (detailed description because it is a known configuration) Is omitted).

  The diaper 1 can be used in combination with another absorbent pad (not shown) such as a urine absorbing pad. The urine absorbing pad is used by being placed on the skin side surface of the top sheet 21 of the diaper 1. In that case, it is preferable to insert and hold the end of the urine absorbing pad in the longitudinal direction in the pocket-shaped space SP. If it does in this way, it will become easy to position, when mounting a urine picking pad on the skin side of top sheet 21. Moreover, since the edge part of the urine pick-up pad is inserted in the pocket-shaped space SP, the urine pick-up placed on the skin side of the top sheet 21 when the diaper 1 is laid under the wearer's body. The edge of the pad does not touch the wearer's skin. Therefore, the wearer's skin trouble which the said edge part can raise can also be prevented effectively. Further, when using the diaper 1 as in the embodiment, the alignment between the center in the width direction of the diaper and the center in the width direction of the absorbent pad is made using the vicinity of the end on the back side formed in a shape close to an arc as a mark. Becomes easy.

  Moreover, as shown to FIG. 11A, you may provide low-weight areas, such as a slit, in the absorptive core 11. FIG. FIG. 11A is a schematic plan view of the diaper 1 in a developed state.

  In this example, slits S <b> 1 a to S <b> 1 c are formed in the central region in the width direction of the absorbent core 11. The slit S1a is formed in the ventral side 1a. The slit S1b is formed in the crotch part 1m. The slit S1c is formed in the back side portion 1b. On the outer side in the width direction of the central region, slits S2a to S2c and slits S3a to S3c are formed. The slit S2a and the slit S3a are formed so as to sandwich the slit S1a in the ventral side 1a. The slit S2b and the slit S3b are formed so as to sandwich the slit S1b in the crotch part 1m. The slit S2c and the slit S3c are formed so as to sandwich the slit S1c in the back side portion 1b. Each slit has a lower basis weight than the other region of the absorbent core 11.

  By forming at least a central region (a part of the central region) in the width direction of the absorbent core 11 with a low basis weight in a slit shape, wrinkles easily enter the low basis portion, and the presence of the absorbent core 11 Since a color difference occurs between the area and the non-existing area, the area can be used as a mark when the diaper 1 (absorbent pad) is worn. In addition, since the apex of the back-side end 1 kbeL formed in an arc shape is located substantially on the extension line of the central region, the center in the width direction of the back-side end 1 kbeL is easy to understand. Therefore, alignment with the center of the width direction of the diaper 1 and the center of a wearer's body (or the center of the width direction of an absorbent pad) becomes easier. Also, when the absorbent pad is mounted, if the disposable diaper is mounted from the outside after the absorbent pad is fitted to the wearer's body, the absorbent core 11 is easily bent in the longitudinal direction with the slit as a base point, particularly the central slit. Since the absorbent core 11 is mountain-folded at the part, the absorbent pad can be firmly pressed against the body. Further, the absorbent core 11 has a larger basis weight than the central region as it goes to the side in the width direction. The position of the absorbent pad is difficult to shift, and the absorbent core 11 can be prevented from cracking during the manufacturing process.

In addition, the following modes are possible.
(Aspect 1-1)
A main body having a longitudinal direction, a width direction, and a thickness direction absorbs a liquid, a top sheet that covers the absorbent core from the skin side in the thickness direction, and the absorbent core has the thickness. An absorbent article having a back sheet covering from the non-skin side in the vertical direction,
The end portion in the longitudinal direction of the main body portion constitutes a waistline opening, and the waistline elastic member along the width direction is applied to the end portion in order to apply the contraction force in the width direction to the end portion. Is provided,
In the main body portion, the absorbent core is present in a portion inside the longitudinal direction from the end portion, and the portion between the end portion and the absorbent core in the main body portion is the Both the waistline elastic member and the absorbent core are non-existing parts,
In a predetermined position in the width direction, a sheet-like three-dimensional gather forming portion is provided along the longitudinal direction,
The three-dimensional gather forming portion has a base end portion that cannot stand up and an upright portion that can stand up on the skin side in the thickness direction with the base end portion serving as a fulcrum in the width direction. Based on the contracting force in the longitudinal direction that acts, the standing portion contracts in the longitudinal direction, so that the standing portion stands on the skin side in the thickness direction,
A fixing portion that fixes the end portion to the body portion is formed at the end portion in the longitudinal direction of the standing portion, and the innermost portion in the longitudinal direction among the fixing portions. The part of is located in the said non-existing part, The absorbent article characterized by the above-mentioned.
(Aspect 1-2)
The contraction force of the standing part is given from an elastic member provided on the standing part along the longitudinal direction,
The fixing portion extends across the non-existing portion and the end portion of the main body portion,
The absorbent article characterized in that no contractive force in the longitudinal direction is generated in a portion of the elastic member located at the end of the main body.
(Aspect 1-3)
The absorbent article characterized in that no contractive force in the longitudinal direction is generated in a portion of the elastic member located in the non-existing portion.

Further, as is apparent from FIGS. 10, 11A, and 11B, the following modes are possible.
(Aspect 2-1)
A dorsal side flap is formed on the back side of the main body so as to extend outward in the width direction from the main body, and a pair of fastening tapes are provided on both sides of the dorsal side flap in the width direction. And the pair of fastening tapes each have an engaging portion that engages with the abdomen side portion of the main body portion when the absorbent article is worn,
When a center position in the longitudinal direction at a predetermined position in the width direction of the engagement portion is a center position, a center line that connects the center positions of the pair of engagement portions along the width direction, The absorbent article, wherein the absorbent article passes through the non-existing portion at a central portion in the width direction of the absorbent article.
(Aspect 2-2)
The absorbent article according to claim 1, wherein an inner end portion in the longitudinal direction of the fixing portion is present outside in the longitudinal direction from a position through which the center line passes.
(Aspect 2-3)
A straight line connecting the outer end positions of the pair of engaging portions along the width direction when the position of the outer end in the longitudinal direction at the predetermined position in the width direction of the engaging portion is defined as the outer end position. However, the absorbent article is characterized by passing through a portion of the main body portion where the thread-like elastic member is disposed.
(Aspect 2-4)
A straight line connecting the inner end positions of the pair of engaging portions along the width direction when the position of the inner end in the longitudinal direction at the predetermined position in the width direction of the engaging portion is set as the inner end position. However, the absorbent article is characterized in that it passes through a portion of the main body where the absorbent core is disposed.
(Aspect 2-5)
The pair of fastening tapes have the engaging portions at a plurality of locations in the longitudinal direction,
The center line is the center position determined for the engaging portion closest to the position where the thread-like elastic member is arranged in the longitudinal direction among the plurality of engaging portions provided in the longitudinal direction. Absorbent article characterized by passing through.
(Aspect 2-6)
An absorbent article, wherein a region of the thread-like elastic member that can expand and contract in the width direction and the three-dimensional gather forming portion are overlapped and joined.
(Aspect 2-7)
The back side flap and the fastening tape are composed of different members,
The said fastening tape is joined to the said width direction outer side edge part of the said back side flap, The absorbent article characterized by the above-mentioned.
(Aspect 2-8)
Having a plurality of creases along the width direction that serve as base points when the absorbent article is folded in the longitudinal direction;
The region where the plurality of folds are formed has a lower rigidity than the other regions in the longitudinal direction of the main body portion.

Further, as is apparent from FIG. 6, the following modes are possible. The stretchable region 72 is a range in which the waistline elastic member 71 can be stretched. In other words, portions other than the stretchable region 72 in the waistline elastic member 71 do not stretch because the rubber threads 71a to 71e are bonded to the top sheet 21 with the natural length.
(Aspect 3-1)
A pair of second solid gathers are provided along the longitudinal direction on the outer side in the width direction than the first solid gathers provided in the solid gather forming portion,
The second three-dimensional gather is arranged with the elastic member for the second three-dimensional gather in the longitudinal direction, and stands on the skin side in the thickness direction with the second base end portion that cannot stand up and the second base end portion serving as a fulcrum. Possible second uprights side by side in the width direction,
A second fixing portion that fixes the end portion in a state of being overlapped with the main body portion is formed at the end portion in the longitudinal direction of the second upright portion,
The fixing portion exists outside the absorbent core in the longitudinal direction,
The absorbent article, wherein the second fixing portion is spaced apart from the expansion / contraction region of the thread-like elastic member across the fixing portion in the width direction.

1 diapers (absorbent articles),
1k body,
1 kbeL on the back end,
1 kbn non-existing part,
11 Absorbent core,
12 core wrap sheet,
21 Top sheet,
30 Leak-proof sheet,
31 exterior sheet,
41g1 first solid gather, 41g2 second solid gather,
41k1 first base end, 41k2 second base end,
41s1 first standing part, 41s2 second standing part,
42b1 first fixing part, 42b1p innermost part,
42b2 second fixing part, 42b2p innermost part,
43b auxiliary fixing part, 43bp innermost part,
47 Three-dimensional gather sheet,
61 Fastening tape,
65 target tape,
71 waist elastic member,
SP pocket-shaped space,
F pulling force, F2 pulling force,

Claims (7)

The main body having a longitudinal direction, a width direction, and a thickness direction is an absorbent article having an absorbent core,
A plurality of thread-like elastic members are provided along the width direction at an end of the main body portion on the back side in the longitudinal direction,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the thread-like elastic member, and the innermost yarn-like elastic member in the longitudinal direction in the main body portion and the absorbency are provided. The portion between the core is a non-existing portion where the thread-like elastic member and the absorbent core do not exist,
A pair of three-dimensional gather forming portions spaced apart in the width direction is provided in the main body portion along the longitudinal direction,
The three-dimensional gather forming portion includes a three-dimensional gather elastic member arranged in the longitudinal direction, and a base end portion that cannot stand up and a stand-up portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum. Having side by side in the width direction,
A fixing portion for fixing the end portion in a state where the end portion is overlapped with the main body portion is formed at the end portion in the longitudinal direction of the standing portion, and the innermost portion in the longitudinal direction among the fixing portions. A fixed end is located in the non-existing portion;
At least a part of the fixing portion is provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction among the plurality of thread-like elastic members ,
A dorsal side flap is formed on the back side of the main body so as to extend outward in the width direction from the main body, and a pair of fastening tapes are provided on both sides of the dorsal side flap in the width direction. And the pair of fastening tapes each have an engaging portion that engages with the abdomen side portion of the main body portion when the absorbent article is worn,
When a center position in the longitudinal direction at a predetermined position in the width direction of the engagement portion is a center position, a center line that connects the center positions of the pair of engagement portions along the width direction, The absorbent article, wherein the absorbent article passes through the non-existing portion at a central portion in the width direction of the absorbent article.   The absorbent article according to claim 1, wherein the fixing portion is provided over an entire region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction. .   The shape of the edge portion in the longitudinal direction of the absorbent core is a curved shape in which the central portion in the width direction protrudes more outward in the longitudinal direction than the end portion in the width direction. The absorbent article according to claim 1 or 2.   The center region in the width direction of at least the absorbent core is formed with a lower basis weight than other regions of the absorbent core. Absorbent article.   The end of the main body portion on the back side in the longitudinal direction is located outside the outermost thread-like elastic member in the longitudinal direction and contracts as the thread-like elastic member contracts. The absorptive article according to any one of claims 1 to 4, wherein a contraction region which is longer in the longitudinal direction than an interval between the matching thread-like elastic members is formed.   The length in the longitudinal direction of the contraction region is longer than half of the length in the longitudinal direction of a region sandwiched between the outermost thread-like elastic member and the innermost thread-like elastic member. Item 6. An absorbent article according to Item 5. The main body having a longitudinal direction, a width direction, and a thickness direction is an absorbent article having an absorbent core,
A plurality of thread-like elastic members are provided along the width direction at an end of the main body portion on the back side in the longitudinal direction,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the thread-like elastic member, and the innermost yarn-like elastic member in the longitudinal direction in the main body portion and the absorbency are provided. The portion between the core is a non-existing portion where the thread-like elastic member and the absorbent core do not exist,
A pair of three-dimensional gather forming portions spaced apart in the width direction is provided in the main body portion along the longitudinal direction,
The three-dimensional gather forming portion includes a three-dimensional gather elastic member arranged in the longitudinal direction, and a base end portion that cannot stand up and a stand-up portion that can stand on the skin side in the thickness direction with the base end portion serving as a fulcrum. Having side by side in the width direction,
A fixing portion for fixing the end portion in a state where the end portion is overlapped with the main body portion is formed at the end portion in the longitudinal direction of the standing portion, and the innermost portion in the longitudinal direction among the fixing portions. A fixed end is located in the non-existing portion;
At least a part of the fixing portion is provided in a region sandwiched between the innermost thread-like elastic member and the outermost thread-like elastic member in the longitudinal direction among the plurality of thread-like elastic members,
Having a plurality of creases along the width direction that serve as base points when the absorbent article is folded in the longitudinal direction;
One area in which a plurality of said folds are formed, the absorbent article, which comprises passing the non-occupied part.

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