JP2016032591A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply an equal tensile force to part where a pocket is formed in a diaper having the pocket in a back side part.SOLUTION: A part between a waistline elastic member 71 and an absorbent core in a body part is a non-existing part 1kbn where the waistline elastic member and the absorbent core do not exist, a back side flap extending outside in a width direction from the body part is formed on the back side of the body part, a pair of fastening tapes 61 is provided both sides of the back side flap in a width direction, the pair of fastening tapes each has an engagement part 61m to be engaged with a ventral part when an absorbent article is worn, and in the case that the central positions of the engagement parts in a longitudinal direction at a predetermined position in a width direction are a central position, a center line CL connecting the central positions of the pair of engagement parts to each other in the width direction passes through the non-existing part in the central part of the absorbent article in a width direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an absorbent article.

  Conventionally, open-type disposable diapers have been widely used. In open-type disposable diapers, a fastening tape is provided on the side flap on the rear side (the wearer's back side), and a target tape that engages the fastening tape is provided on the front side (the wearer's abdomen side). It has been. As an example of such a disposable diaper, a waistline elastic member along the product width direction is provided on the rear side, and the region between the waistline elastic member and the absorbent main body is contracted toward the inner surface of the diaper. A technique for forming an open pocket is known (for example, Patent Document 1).

JP 2001-61888 A

  In the disposable diaper of Patent Document 1 (hereinafter, also simply referred to as “diaper”), a pocket is formed in the vicinity of the rear waist, and the excrement leaks out of the diaper by guiding the excrement to the pocket. Can be suppressed.

  However, in such a diaper, when the fastening tape provided on the side flap is pulled outward in the width direction of the diaper, an uneven tensile force acts on a member (nonwoven fabric or the like) in a region where the pocket is formed. In some cases, wrinkles are likely to occur in the portion. When such wrinkles occur, there is a problem that the pockets are not sufficiently opened and closed, and there is a possibility that the effect of suppressing leakage of excrement cannot be obtained sufficiently.

  The present invention has been made in view of the above problems, and the object of the present invention is to apply an equal tensile force to a portion where a pocket is formed in a diaper having a pocket on the back side. There is.

The main invention for achieving the above object is:
A main body having a longitudinal direction, a width direction, and a thickness direction, and having a belly side part, a crotch part, and a back side part aligned in the longitudinal direction is an absorbent article having an absorbent core, A waistline elastic member is provided along the width direction at the back side end portion in the longitudinal direction of the main body portion, and in the portion inside the longitudinal direction from the back side end portion in the main body portion, The absorbent core is present, and a portion of the main body portion between the waistline elastic member and the absorbent core is a non-existing portion where the waistline elastic member and the absorbent core are not present. The body portion is provided with sheet-like three-dimensional gather forming portions spaced apart in the width direction along the longitudinal direction, and the three-dimensional gather forming portion arranges elastic members for three-dimensional gathers in the longitudinal direction. , The proximal end that cannot stand, and the front Standing portions that can stand on the skin side in the thickness direction with a base end portion as a fulcrum are arranged in the width direction, and the standing portion contracts in the longitudinal direction so that the standing portion has the thickness. Standing on the skin side of the direction, a fixing portion is formed on the end portion in the longitudinal direction of the standing portion, and the fixing portion is fixed in a state where the end portion is overlapped with the main body portion. The inner end portion in the longitudinal direction exists outside the absorbent core in the longitudinal direction, and a dorsal side flap extending from the main body portion to the outer side in the width direction is provided on the back side of the main body portion. A pair of fastening tapes are provided on both sides in the width direction of the dorsal side flap, and the pair of fastening tapes engage with the abdominal side part when the absorbent article is worn. Each has an engaging part, front When a center position in the longitudinal direction at a predetermined position in the width direction of the engaging portion is defined as a center position, a center line connecting the center positions of the pair of engaging portions along the width direction is 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.

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

  According to the present invention, in a diaper having a pocket on the back side, the pocket can be formed neatly by applying an equal tensile force to the portion where the pocket is formed.

It is a schematic plan view of the development state of disposable diaper 1 as an absorptive article concerning an embodiment. 2A, FIG. 2B, and FIG. 2C are the AA sectional view 11-B sectional view and CC sectional view in FIG. 1, respectively. It is a schematic perspective view of the disposable diaper 1 of a mounting state. It is a schematic plan view which expands and shows the back side part 1b of the disposable 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 figure explaining the positional relationship of the male material 61m (engagement part) of the fastening tape 61, and the non-existing part 1kbn. It is a schematic plan view (plan view seen from the skin side) which expands and shows back side part 1b of disposable diaper 1 concerning this embodiment in a natural state. It is a schematic plan view which expands and shows the back side part 1b of the disposable diaper 1 which concerns on other embodiment. It is a schematic plan view which expands and shows the back side part 1b of the disposable diaper 1 which concerns on other embodiment. It is a schematic plan view which expands and shows the back side part 1b of the disposable diaper 1 which concerns on other embodiment. It is a figure explaining the slit provided in the disposable diaper. It is longitudinal direction sectional drawing of the diaper 1 of the state folded in three.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
(1) The main body part which has a longitudinal direction, a width direction, and a thickness direction, and which has an abdominal part, a crotch part, and a back side part along with the longitudinal direction is an absorptive article which has an absorptive core. A waistline elastic member is provided along the width direction at a back side end portion in the longitudinal direction of the main body portion, and a portion on the inner side in the longitudinal direction than the back side end portion in the main body portion. The absorbent core is present, and a portion of the main body portion between the waistline elastic member and the absorbent core is a non-existing portion where the waistline elastic member and the absorbent core are not present. The main body is provided with a sheet-like three-dimensional gather forming portion that is spaced apart in the width direction along the longitudinal direction, and the three-dimensional gather forming portion includes a three-dimensional gather elastic member in the longitudinal direction. Proximal end that cannot be stood , With the base end portion as a fulcrum, standing portions that can stand on the skin side in the thickness direction are arranged side by side in the width direction, and the standing portion contracts in the longitudinal direction, whereby the standing portion is A fixing portion is formed to stand on the skin side in the thickness direction and is fixed to the end portion in the longitudinal direction of the standing portion in a state where the end portion is overlapped with the main body portion. The inner end portion in the longitudinal direction of the portion exists outside the absorbent core in the longitudinal direction, and the back side of the main body portion extends from the main body portion to the outer side in the width direction. A flap is formed, and a pair of fastening tapes are provided on both sides in the width direction of the dorsal side flap, and the pair of fastening tapes are engaged with the abdomen side portion when the absorbent article is worn. Each has an engaging part 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 connecting the center positions of the pair of engagement portions along the width direction is 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.

  According to such an absorbent article, in a diaper having a pocket on the back side, it is possible to form the pocket neatly by applying an equal tensile force to the portion where the pocket is formed.

  (2) In such an absorbent article, it is desirable that the inner end portion in the longitudinal direction of the fixed portion is 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.

  (3) In such an absorbent article, when the position of the outer end in the longitudinal direction at the predetermined position in the width direction of the engaging portion is set as the outer end position, the outer ends of the pair of engaging portions It is desirable that a straight line that connects positions along the width direction passes through a portion of the main body portion where the waistline elastic member 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 waistline elastic member, and the waistline elastic member is extended outward in the width direction without being loosened. Thereby, the non-existing part formed adjacent to the waistline elastic member in the longitudinal direction can be easily extended in the width direction without slackening.

  (4) In this absorbent article, 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, the inner ends of the pair of engaging portions It is desirable that a straight line connecting the positions along the width direction passes through a portion where the absorbent core is disposed in the main body portion.

  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.

  (5) In such an absorbent article, the pair of fastening tapes have the engaging portions at a plurality of locations in the longitudinal direction, and the center line is a plurality of the engagement tapes provided in the longitudinal direction. It is desirable that the center portion passes through the central position defined for the engaging portion at a position closest to the position where the waistline elastic member is disposed in the longitudinal direction.

  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.

  (6) In such an absorbent article, it is desirable that a region of the waistline elastic member that can be expanded and contracted in the width direction and the solid gathering portion are overlapped and joined.

  According to such an absorbent article, as the waistline elastic member extends outward in the width direction by the pulling force on the outer side in the width direction, a force that opens outward in the width direction with respect to the pair of three-dimensional gather sheets is provided. It acts and it is controlled that the solid gathers sheet falls down in the width direction. This makes it easier for the three-dimensional gather sheet to stand up when the diaper is worn, and to prevent the excrement and the like from leaking out of the diaper.

  (7) In such an absorbent article, the back side flap and the fastening tape are made of different members, and the fastening tape is joined to the widthwise outer end of the back side flap. It is desirable.

  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, and the strength of the joint is increased. Can do. 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.

  (8) Such an absorbent article, wherein the absorbent article has a plurality of folds along the width direction that serve as a base point when the absorbent article is folded in the longitudinal direction, and is one of the regions where the plurality of folds are formed. It is desirable to pass through the non-existing part.

  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.

  In such an absorbent article, a pair of first three-dimensional gathers spaced in the width direction are provided along the longitudinal direction in the main body portion, and a pair of first three-dimensional gathers are disposed outside the first three-dimensional gather in the width direction. A two-dimensional gather is provided along the longitudinal direction, and the first three-dimensional gather has a first base member that has a first elastic member disposed in the longitudinal direction and cannot stand up, and the first base end. The first upright portion that can stand on the skin side in the thickness direction is arranged side by side in the width direction, and the second three-dimensional gather has a second elastic member arranged in the longitudinal direction and cannot stand up. A second base end portion and a second stand up portion that can stand on the skin side in the thickness direction with the second base end portion as a fulcrum, and are arranged in the width direction. The first three-dimensional gather is fixed to the back end of the main body in a state of being overlapped with the main body. A fixing portion is formed, and a second fixing portion that fixes the second three-dimensional gather in a state of being superimposed on the main body portion is formed at the back side end portion of the second standing portion, The first fixing part and the elastic region of the waistline elastic member overlap, the first fixing part exists outside the absorbent core in the longitudinal direction, and the second fixing part is the first fixing part. It is desirable that the waist elastic member is spaced apart from the expansion / contraction region in the width direction.

According to such a configuration, the contraction force in the expansion / contraction region of the waistline elastic member 71 and the contraction force by the first elastic member are obtained in the first fixing portion by overlapping the expansion / contraction region of the waistline elastic member and the first three-dimensional gather. In conjunction, the waistline elastic member and the first elastic member continuously contract. On the other hand, since the second fixing portion is spaced apart from the expansion / contraction region of the waistline elastic member across the first fixing portion, the contraction force of the waistline elastic member and the contraction force of the second elastic member are not interlocked.
If the second fixing part of the second three-dimensional gather overlaps with the expansion / contraction region of the waistline elastic member, the contraction force of the waistline elastic member and the contraction force by the second elastic member are also linked, and the second fixing part Will shrink. Then, not only the expansion / contraction region of the waistline elastic member and the first fixing portion, but also the second fixing portion contracts in the width direction, and the entire back side end portion is pulled inward in the longitudinal direction. When wearing a property article, wrinkles are formed at the back end, or the flap is pulled inward in the width direction and enters under the user's body, so that the wearability is lowered.
On the other hand, in the above configuration, as described above, the contraction force of the waistline 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. In the region where shrinkage is unlikely to occur, the material is substantially extended, and it is difficult for wrinkles to be formed on the outer side in the width direction from this region. Since it becomes a shape, the center in the width direction can be more easily determined with reference to these regions on the left and right sides. In addition, since it is difficult for the flap to enter under the body and it is easy to pull it outward in the width direction, it is possible to stretch the wrinkles and warps formed under the user's body so that the product can be worn, so it fits the body Also improves. Moreover, it becomes easy to insert a pad when using an absorptive pad as an auxiliary | assistant absorption by extending a wrinkle and warp.

  In such an absorbent article, it is preferable that the second fixing portion is present outside the absorbent core in the longitudinal direction.

  According to such an absorbent article, since the second fixing portion exists outside the absorbent core in the longitudinal direction, the second fixing portion can be formed closer to the end portion in the longitudinal direction. As described above, in the second fixing portion, it is possible to provide a region in which the shrinkage in the width direction does not easily occur, and by providing the region in which the shrinkage in the width direction does not easily occur near the end in the longitudinal direction, Can be easily identified. Further, while the waistline elastic member is pulled by the contraction force of the first three-dimensional gather, the stretchable region of the rigid waistline elastic member maintains the surface shape, so that the longitudinal section is Z-shaped and the pocket-like space is formed in the non-existing portion. However, since the pocket-shaped space can be further increased by this configuration, leakage on the back side can be prevented.

  (9) In such an absorbent article, the shape of the end edge portion in the longitudinal direction of the absorbent core is such that the central portion in the width direction is longer than the end portion in the width direction. It is desirable to have a curved shape protruding outward in the direction.

  According to such an absorbent article, the shape of the edge portion in the longitudinal direction of the absorbent core is such that the central portion in the width direction protrudes more outward in the longitudinal direction than the end portion in the width direction. Since it has a curved shape, the shrinkage force of the waistline elastic member and the shrinkage force of the first elastic member are interlocked so that the waistline elastic member and the first upright portion contract along the curve shape. Therefore, it becomes easy to identify the central portion in the width direction on the basis of the shape contracted along the curved shape. 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.

  (10) In such an absorbent article, it is preferable 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, the center region in the width direction of the absorbent core is formed with a low basis weight so that the region becomes a mark when the disposable diaper (absorbent pad) is worn, and the pad fit is reduced. Can do well. Therefore, it becomes easier to align the center in the width direction of the disposable diaper and the center of the user's body (or the center in the width direction of the absorbent pad).

(11) Such an absorbent article, wherein the waistline elastic member includes a plurality of thread-like elastic members along the width direction,
Of the first fixed part, the innermost fixed end in the longitudinal direction is located in the non-existing part,
At least a part of the first 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. Is desirable.

  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 of the disposable diaper in the width direction and the wearer's body Positioning with the center (or the center in the width direction of the absorbent pad) becomes easy.

  In this absorbent article, it is preferable that the first 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.

  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, it becomes easier to align the center in the width direction of the disposable diaper and the center of the wearer's body (or the center in the width direction of the absorbent pad).

  In such an absorbent article, the back side end portion is located outside the outermost thread-like elastic member in the longitudinal direction and contracts as the thread-like elastic member contracts, and is adjacent to the back-side end portion. 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, it becomes easier to align the center in the width direction of the disposable diaper and the center of the wearer's body (or the center in the width direction of the absorbent pad).

  In such an absorbent article, the length in the longitudinal direction of the contraction region is more 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. Long is desirable.

  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.

=== Embodiment ===
Drawing 1 is an outline top view of the deployment state (after-mentioned) of disposable diaper 1 for adults as an absorptive article concerning an embodiment. 2A, FIG. 2B, and FIG. 2C are the AA sectional view 11-B sectional view and 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 disposable diaper 1 in a worn state, and FIG. 4 is a schematic plan view showing the back side portion 1b of the disposable diaper 1 in an enlarged manner. FIG. 5 is a schematic cross-sectional view showing how a pocket-shaped space SP is formed in the main body 1k based on the contraction force of the 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. The disposable diaper 1 is stretched in both the longitudinal direction and the width direction until the contraction of the end portion 1 kbeL and the contraction of the rec flap 1mf based on the leg-hole elastic member 81 are eliminated.

  The disposable diaper 1 is an unfolded (open type) diaper that is worn by a wearer using a fastening tape 61. The disposable diaper 1 in the unfolded state as shown in FIG. 1 has a longitudinal direction, a width direction, and a thickness direction as three directions orthogonal to each other. Here, with respect to the longitudinal direction, the abdomen 1a, the crotch 1m, and the dorsal part 1b are arranged in this order, and in the wearing state of FIG. 3, the abdomen 1a is a wearer (not shown). The crotch part 1m covers the crotch of the wearer, and the back side part 1b covers the back side of the wearer.

  In the unfolded state of FIG. 1, the abdomen side portion 1a and the back side portion 1b each extend outward in the width direction from the crotch portion 1m, and thereby the disposable diaper 1 viewed from the thickness direction. The outer shape of this has a substantially hourglass shape in plan view. Hereinafter, the portions 1asf, 1asf extending outward in the width direction in the abdominal side portion 1a are also referred to as “abdominal side flaps 1asf”, and the portions 1bsf extending outward in the width direction in the back side portion 1b. , 1bsf is also referred to as “back side flap 1bsf”. Further, hereinafter, one side in the thickness direction is also referred to as “skin side”, and the other side is also referred to as “non-skin side”. The schematic plan view of FIG. 1 is a view of the deployed disposable diaper 1 as seen from the skin side.

  Here, as shown in FIG. 1, fastening tapes 61 are provided to protrude in the width direction at outer end portions in the width direction of the respective back side flaps 1bsf. And by fastening each fastening tape 61, 61 to the target tape 65 (FIGS. 1 and 2C) provided on the non-skin side surface of the abdominal side portion 1a, as shown in FIG. 3, the waistline opening HB and A pair of leg-hole openings HL and HL are formed, and the disposable diaper 1 is worn by the wearer.

  As shown in FIGS. 1, 2B and 2C, the disposable diaper 1 has a sheet-like main body 1k. The main body 1k 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 a leak-proof sheet that covers the absorbent core 11 from the non-skin side. 30 and an exterior sheet 31 that covers the absorbent core 11 from the non-skin side than the leak-proof sheet 30 and forms the exterior of the disposable diaper 1.

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

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

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

  The absorptive core 11 exists in the inner part of a longitudinal direction rather than the edge part 1kbeL of the back side among the main-body parts 1k (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. Moreover, the absorptive core 11 is coat | covered with the liquid-permeable core wrap sheet | seat 12 from both the skin side and non-skin side of a thickness direction, respectively (FIG. 2B). Examples of suitable materials for the core wrap sheet 12 include tissue paper and nonwoven fabric. However, these core wrap sheets 12 are not essential components.

  The top sheet 21 is a flexible and liquid-permeable rectangular sheet that covers the absorbent core 11 from the skin side. 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 with a hot melt adhesive or the like. It is fixed. 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 such a size. In the present embodiment, the top sheet 21 is provided over the entire length of the disposable diaper 1 in the longitudinal direction (FIG. 1). A suitable material for the top sheet 21 may be an appropriate nonwoven fabric such as 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 and 2B). And the non-skin side surface of the absorptive core 11 is coat | covered with the core wrap sheet | seat 12 as mentioned above, and the leak-proof sheet 30 is hot to the core wrap sheet | seat 12 covering the core wrap sheet | seat 12 from the non-skin side. It is fixed with a melt adhesive or the like. Moreover, in order to cover the whole area of the non-skin side surface of the absorbent core 11, 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. In this example, the leak-proof sheet 30 is provided over the entire length of the disposable diaper 1 in the longitudinal direction (FIG. 1). And the part which protrudes in the longitudinal direction or the width direction from the absorptive core 11 and the core wrap sheet | seat 12 among the leak-proof sheet | seats 30 is being fixed to the top sheet 21 or the three-dimensional gather sheet | seat 47 with the hot-melt adhesive agent. As a material suitable for the leak-proof sheet 30, a resin film such as a polyethylene film can be exemplified, but the material is not limited to this as long as it has liquid impermeability and flexibility.

  The exterior sheet 31 (corresponding to the back sheet) is a sheet that forms the exterior of the disposable diaper 1 as described above. 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 (FIG. 2B). The exterior sheet 31 in the present embodiment also forms the outer shape of the disposable 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 (FIGS. 2A to 2C). A suitable material for the exterior sheet 31 may be an appropriate nonwoven fabric such as an SMS (spunbond-meltblown-spunbond) nonwoven fabric, but is not limited thereto as long as it has flexibility. Moreover, 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 and 2B). Of the two three-dimensional gathers, the three-dimensional gather located inside in the width direction is called “first three-dimensional gather 41g1”, and the three-dimensional gather located outside the first three-dimensional gather 41g1 in the width direction. This is referred to as “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. Moreover, the part of the fold line L which concerns on this return | turnback is the 1st base end part 41k1 which cannot stand up. The first base end portions 41k1 and 41s1 are provided side by side in the width direction. In the first standing portion 41 s 1, the width direction leading end portion 41 new (end portion 21 ew) has, for example, one 940 DTEX thread rubber 451 as the first three-dimensional gather elastic member 451 along the longitudinal direction. It is fixed by a hot-melt adhesive or the like in a stretched state twice the natural length in the direction. 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 end of the top sheet 21 in the width direction corresponds to a “three-dimensional gather forming portion”. 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 flange-like first upright 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 a value of 0.0. The extension state of the elastic member 451 for the first three-dimensional gather when fixing to the first upright portion 41s1 is determined so that the contraction force of 5N to 2N is generated. For example, in this example, one thread rubber 451 of 940DTEX is used. Therefore, the contraction force of the thread rubber 451 at the time of 93% extension is set by fixing the stretched state in the longitudinal direction of the one thread rubber 451 to twice the natural length and fixing it to the first upright portion 41s1. Is contained in 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 part of the main body portion 1k. 1st fixing | fixed part 42a1, 42b1 fixed in the state piled up on the part of the top sheet | seat 21 is each formed in the strip | belt shape along a longitudinal direction. That is, the first fixing is performed between the portions corresponding to the first fixing portions 42a1 and 42b1 in the respective end portions 41s1eLa and 41s1eLb and the inner portion of the top sheet 21 in the width direction with respect to the folding line L. The hot melt adhesive is provided in a band shape along the longitudinal direction as the portions 42a1 and 42b1, and the end portions 41s1eLa and 41s1eLb are overlapped with the portions of the top sheet 21 forming a part of the main body 1k by the adhesive. Fixed.

  Moreover, as shown in FIG. 4 etc., innermost part 42b1p which is an inner end part of the longitudinal direction in the 1st fixing | fixed part 42b1 located in the back side part 1b is in the longitudinal direction rather than the absorptive core 11 in the main-body part 1k. Exists outside. More desirably, the waistline elastic member 71 and the absorbent core 11 are 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 first fixing portion 42b1 is an example of a “fixing portion”. The innermost part 42b1p is an example of a “fixed end”. The back end 1 kbeL is a portion located on the outer side in the longitudinal direction from the arrangement position of the waistline elastic member 71 located on the innermost side in the longitudinal direction in the main body 1 k.

  The longitudinal dimension of the back end 1 kbeL is selected from a range of, for example, 20 mm to 40 mm in the deployed state of the disposable diaper 1 as shown in FIG. 4, and the waistline elastic member 71 provided at the back end 1 kbeL. Similarly, the dimension in the width direction is selected from 180 mm to 220 mm in the unfolded state.

  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 facing inward in the longitudinal direction. Therefore, the main body 1k is pulled inward in the longitudinal direction through the innermost part 42b1p.

  Here, in the present embodiment, the innermost part 42b1p is disposed on the outer side in the longitudinal direction of the absorbent core 11 in the main body 1k, and more preferably, the non-existing part 1kbn (the part indicated by the dot pattern in FIG. 4). Browse). The non-existing portion 1 kbn is a portion where the waistline elastic member 71 and the absorbent core 11 do not exist as described above, and has lower rigidity than other regions.

  Therefore, as shown in FIG. 5, based on the input of the above-described pulling force F, the main body 1k is quickly bent into a substantially Z shape in cross section in the non-existing portion 1kbn, and as a result, the back end A pocket-shaped space SP can be formed at a position between the portion 1 kbeL and the absorbent core 11.

  In this case, the pulling force F directed inward in the longitudinal direction is input to the non-existing portion 1 kbn via the innermost portion 42 b 1 p of the first fixing portion 42 b 1. Therefore, the pulling force F is generally not input to the back end 1 kbeL located adjacent to the outside in the longitudinal direction from the non-existing portion 1 kbn, and as a result, the back end 1 kbeL rises. Can be suppressed. A pocket-shaped space SP (FIG. 5) can be reliably formed at a position between the back end 1 kbeL and the absorbent core 11.

  Further, as in the example of FIG. 4, when the innermost portion 42b1p of the first fixing portion 42b1 is located on the inner side of the longitudinal center position C1kbnL in the non-existing portion 1kbn, the inner side in the longitudinal direction is directed. The pulled pulling force F can be input to a position further away from the back end 1 kbeL. As a result, the rising of the back end 1 kbeL can be more effectively suppressed, and the back end 1 kbeL is not easily bent inward at the time of wearing, and the surface shape can be maintained, so that the back of the wearer can be fitted. .

  Further, in the example of FIG. 4, the first fixing portion 42b1 is formed at a position on the inner side in the width direction with respect to the center position C41sw in the width direction of the first standing portion 41s1. As a result, the first upright portion 41s1 is securely fixed in the region 41seLb where the first upright portion 41s1 and the back end 1kbeL overlap. However, the present invention is not limited to this. In some cases, the first fixing portion 42b1 may be formed on the outer side in the width direction with respect to the center position C41sw.

  As shown in FIG. 4, 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. The auxiliary fixing portion 43b assists the first fixing portion 42b1. Since the auxiliary fixing portion 43b acts to crush the gap between the first upright portion 41s1 and the top sheet 21 that may occur at a position between the first fixing portion 42b1 and the first base end portion 41k1, the region 41seLb It is possible to effectively prevent urine leakage from the urine.

  The auxiliary fixing portion 43b is also formed of a hot melt adhesive. That is, as shown in FIG. 2A, the hot melt adhesive as the auxiliary fixing portion 43b is interposed between the first upright portion 41s1 and the top sheet 21 in a band shape along the longitudinal direction. The first standing portion 41s1 and the 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 example, the dimension in the width direction of the auxiliary fixing portion 43b is smaller than the dimension in the width direction of the fixing portion 42b, and the innermost portion that is the innermost portion in the longitudinal direction in the auxiliary fixing portion 43b. The position in the longitudinal direction of 43 bp is aligned with the same position as the innermost part 42 b 1 p of the first fixing portion 42 b 1. However, it is not limited to this. That is, the dimension in the width direction of the auxiliary fixing portion 43b may be larger or smaller than that of the first fixing portion 42b1. Further, the position in the longitudinal direction of the innermost portion 43bp of the auxiliary fixing portion 43b may be positioned on the outer side in the longitudinal direction than the innermost portion 42b1p of the first fixing portion 42b1, or may be positioned on the inner side. good. However, in any case, it is desirable that the innermost portion 43bp of the auxiliary fixing portion 43b be positioned at the non-existing portion 1kbn as shown in FIG. It becomes easy to input the pulling force F directed inward in the longitudinal direction based on the force to the non-existing portion 1 kbn, and to suppress the rise of the waistline elastic member arrangement target portion 1 kbeL. However, these auxiliary fixing portions 43b are not essential components.

  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 the first base end portion 41k1 or in the vicinity thereof, so that the three-dimensional gather sheet 47 is fixed to the top sheet 21. However, it is the second base end portion 41k2 that cannot stand up, and the portion of the three-dimensional gather sheet 47 that can be positioned on the inner side in the width direction than the second base end portion 41k2 (the portion that is folded outward). The second base end portion 41k2 serves as a second upright portion 41s2 that can stand up. Further, at the distal end portion in the width direction of the second upright portion 41 s 2, for example, one elastic rubber 452 of 940 DTEX as the second three-dimensional gather elastic member 452 along the longitudinal direction has a natural length of 2 in the longitudinal direction. It is fixed with a hot-melt adhesive or the like in an expanded state of 5 times. 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). As a suitable material for the three-dimensional gather sheet 47, an appropriate non-woven fabric can be exemplified, and an SMS non-woven fabric is used here, but it 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 to substantially the same position as the outer end edges 31ew and 31ew of the exterior sheet 31, The outer edge 31ew or a position near the outer edge 31ew is bonded and integrated with the exterior sheet 31 by a hot melt adhesive or the like. Thereby, the three-dimensional gather sheet 47 and the exterior sheet 31 cooperate with each other, and the above-described ventral side flaps 1asf and 1asf and the dorsal side flaps 1bsf and 1bsf are formed in the ventral side portion 1a and the back side portion 1b, respectively. ing. On the other hand, 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 the outer end edge 31ew or in the vicinity thereof. Leg flaps 1mf and 1mf are formed over a predetermined range in the width direction from 31ew.

  Each of the leg flaps 1mf and 1mf is a part that becomes the leg opening HL in the mounted state, that is, a part that covers the leg circumference of the wearer. In order to form leg gathers by contracting the leg flaps 1mf in the longitudinal direction, the leg flaps 1mf are respectively provided with a plurality of thread rubbers 81, 81 along the longitudinal direction as leg elastic members 81, 81, respectively. It is fixed by a hot melt adhesive or the like in a stretched state in the direction. Therefore, when the extension state of the leg elastic members 81, 81 is relaxed, the leg flap 1mf contracts in the longitudinal direction to form a plurality of ridges, and the ridges become leg gathers.

  As shown in FIG. 2B, unlike the first upright portion 41s1, the second upright portion 41s2 is folded back outward in the width direction with the second base end portion 41k2 or a position near the second upright portion 41k2 being a folded back position. Thus, an “outside opening” state opened outward in the width direction is established. Then, as shown in FIGS. 1, 2A, and 2C, the end portions 41s2eLa and 41s2eLb in the longitudinal direction of the second standing portion 41s2 are respectively connected to the end portions 41s2eLa, 2nd fixing | fixed part 42a2, 42b2 which fixes 41s2eLb in the state piled up on the main-body part 1k is formed in the strip | belt shape along a longitudinal direction. And the 2nd fixing | fixed part 42a2, 42b2 is also formed with the hot-melt-adhesive.

  Specifically, as shown in FIGS. 2A and 2C, the second upright portion 41s2 folded back outward in the width direction is opposed to the outer portion 47p in the width direction of the three-dimensional gather sheet 47 with respect to the second base end portion 41k2. However, the outer portion 47p is fixed and integrated with the main body 1k of the disposable diaper 1 with a hot melt adhesive or the like, and is like a part of the main body 1k. And the 2nd standing part 41s2 is piled up on the part 47p of the three-dimensional gather sheet | seat 47 which became a part of this main-body part 1k in the state folded by the outer side of the width direction. And between the 2nd standing part 41s2 of this piled-up state, and the part 47p of the three-dimensional gather sheet | seat 47 which became like a part of said main-body part 1k, it is hot as 2nd fixing | fixed part 42a2, 42b2. The melt adhesive is inserted, and thereby the second upright portion 41s2 and the portion 47p are fixed by the adhesive at the respective end portions 41s2eLa and 41s2eLb in the longitudinal direction.

  Desirably, as shown in FIG. 4, the innermost portion 42b2p, which is the innermost portion in the longitudinal direction of the second fixing portion 42b2 located on the back side portion 1b, also has a non-existing portion 1kbn (in FIG. 4). (See the portion shown by the dot pattern).

  If this is the case, the contraction force of the second three-dimensional gather elastic member 452 related to the second upright portion 41s2 is also in the form of a tensile force F2 facing inward in the longitudinal direction as shown in FIG. The input is concentrated on the non-existing portion 1 kbn via the portion 42 bp 2, and as a result, it is not generally input to the back end portion 1 kbeL. Therefore, effectively contributing 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. Can do.

  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. That is, the total length dimension in the longitudinal direction of the second upright portion 41s2 before the second three-dimensional gather elastic member 452 is provided, that is, the total length dimension in the longitudinal direction in the absence of the above-described wrinkles. Define length. When the hook-like second upright portion 41s2 provided with the second three-dimensional gather elastic member 452 and contracted in the longitudinal direction is extended to 93% in the longitudinal direction, the second solid gather elastic member 452 has a thickness of 0.02%. The extension state of the elastic member 452 for the second three-dimensional gather when fixing to the second upright portion 41s2 is determined so that the contraction force of 5N to 2N is generated. For example, in this example, one thread rubber 452 of 940DTEX is used. Therefore, by setting the stretched state in the longitudinal direction of the one rubber thread 452 to be twice the natural length and fixing it to the second upright portion 41 s 2, the magnitude of the contraction force of the thread rubber 452 when stretched 93%. Is contained in 0.5N to 2N.

  Further, the innermost part 42b1p of the first fixing part 42b1 and the innermost part 42b2p of the second fixing part 42b2 each contribute to the formation of the pocket-shaped space SP. In the example of FIG. 4, the second fixing part 42b2 The innermost part 42b2p is located on the inner side in the longitudinal direction and on the outer side in the width direction than the innermost part 42b1p of the first fixing portion 42b1.

  Therefore, both of these innermost portions 42b2p and 42b1p can each ride on a substantially arc-shaped curve bulging outward in the longitudinal direction. Then, the innermost part 42b2p of the second fixing part 42b2 and the innermost part 42b1p of the first fixing part 42b1 bend the main body part 1k of the disposable diaper 1 into a substantially Z-shape in cross-section at each position. The shape of the space SP can be formed into a substantially arc shape in plan view. 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 making this substantially arcuate, it is desirable that 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. It is preferable that the contraction force applied from 451 to the first upright portion 41s1 is larger. 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.

  If this is the case, as shown in FIG. 4, the innermost portion 42b2p of the second fixing portion 42b2 is pulled toward the inner side in the longitudinal direction inputted to the innermost portion 42b1p of the first fixing portion 42b1. A pulling force F2 greater than the force F is input, whereby the innermost portion 42b2p of the second fixing portion 42b2 is pulled more inward in the longitudinal direction than the innermost portion 42b1p of the first fixing portion 42b1. Moving. In the first place, the innermost part 42b2p of the second fixing part 42b2 is located on the outer side in the width direction and the inner side in the longitudinal direction than the innermost part 42b1p of the first fixing part 42b1. Therefore, according to the magnitude relationship (F <F2) between the pulling forces F and F2, the central portion in the width direction of the pocket-shaped space SP is formed in a substantially arc shape that protrudes further outward in the longitudinal direction. As a result, the magnitude relationship can effectively contribute to making the pocket-shaped 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 has a flexible substantially rectangular sheet as a tape base 61a, one end of the tape base 61a in the width direction is joined to the outer end of the back side flap 1bsf, and the other end is the back side. Projecting outward in the width direction from the outer end of the flap 1bsf. At the other end, there are protrusions 61ap that protrude further outward in the width direction at two portions in the longitudinal direction. One male material 61m of a hook-and-loop fastener is fixed to each of the skin side surfaces of the two protruding portions 61ap.

This male material 61m is an engaging portion that engages the fastening tape 61 with the target tape 65 in the state where the diaper 1 shown in FIG. Specifically, a plurality of engagement projections (not shown) are provided on the skin side surface of the male material 61m (engagement portion), and the engagement projections are caught on the non-skin side surface of the target tape 65 of the ventral side portion 1a. Thus, the fastening tape 61 is engaged with the target tape 65. As such a male material 61m, a well-known one can be applied as a hook-and-loop fastener. For example, a hooking protrusion or a T-shaped protrusion can be used as appropriate. Moreover, as a suitable material for the tape base material 61a, a flexible sheet material such as a nonwoven fabric can be exemplified. In this example, a nonwoven fabric is used, but the material is not limited to this.

  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. In this example, the tape 65 has a substantially rectangular shape that is long in the width direction, and the tape 65 is packaged by a hot melt adhesive or the like while aligning the center position in the width direction with the exterior sheet 31. It is fixed to the sheet 31. Examples of a material suitable for the target tape 65 include a film on which a female material is disposed, an air-through nonwoven fabric, and the like, but is not limited thereto. Further, instead of using a target tape, a material such as a nonwoven fabric that is easily caught by a locking projection may be used.

  As shown in FIG. 4, the waistline elastic member 71 is provided at the longitudinal back end 1 kbeL of the main body 1 k of the disposable diaper 1 so that the waistline opening HB of the backside 1 b can be expanded and contracted in the width direction. On the other hand, it is a member that imparts contraction force in the width direction. In this example, a plurality of thread rubbers 71 along the width direction are provided in the longitudinal direction as the waistline elastic member 71 at the end 1 kbeL. Specifically, as a plurality of examples, five 940DTEX thread rubbers 71 are arranged extending along the width direction, and each thread rubber 71 extends in the width direction, for example, twice the natural length. In the state, it is fixed between at least one sheet (the top sheet 21 or the leak-proof sheet 30) with a hot melt adhesive or the like while being inserted between the top sheet 21 and the leak-proof sheet 30 forming the main body 1k. . Therefore, when the stretched state is relaxed to the natural state, the back end 1kbeL of the main body 1k is contracted in the width direction, and a plurality of ridges are formed. As a result, each rubber thread 71 can be quickly expanded in the width direction until the heel is fully extended, and as a result, the waist 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 full length dimension in the width direction of the back end 1 kbeL before the waistline elastic member 71 is provided, that is, the full length dimension in the width direction without the above-described wrinkles is defined as a reference length of 100%. To do. 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 example, five 940 DTEX thread rubbers 71 are used as the waistline elastic member 71. Therefore, by setting the stretched state in the longitudinal direction of the five thread rubbers 71 to twice the natural length and fixing the stretched end 1 kbeL to the back end 1 kbeL, the contraction of the five thread rubbers 71 when stretched 93%. The total value of the magnitude of force 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 11eb on the back side in the longitudinal direction of the absorbent core 11 is curved in this way, the size in the longitudinal direction of the non-existing portion 1kbn adjacent to the edge 11eb is: Although it changes according to the position in the width direction, 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.

<About the non-existing portion 1 kbn>
When the diaper 1 is attached to the wearer, the back side portion 1b is arranged on the back side waist portion of the wearer in a state where the fastening tape 61 provided on both sides in the width direction is pulled left and right. In this embodiment, when the area | region of the back side part 1b is pulled by the width direction outer side in this way, it is made not to produce a local wrinkle in the non-existing part 1kbn which is a low rigidity part. That is, the non-existing portion 1 kbn is sufficiently exerted on the outer side in the width direction to sufficiently extend the non-existing portion 1 kbn, so that the pocket-shaped space SP is formed cleanly when the diaper 1 is worn. To do.

  FIG. 6 is a diagram illustrating the positional relationship between the male material 61m (engagement portion) of the fastening tape 61 and the non-existing portion 1 kbn.

  In FIG. 6, in the state where the fastening tape 61 is pulled right and left, the center position in the longitudinal direction at the predetermined position wp in the width direction of the male member 61m (engagement portion) is defined as a center position hcp. In the present embodiment, the center line CL that connects the center positions hcp of the pair of male members 61m, 61m provided on both sides in the width direction along the width direction is the non-existing portion 1kbn in the center portion in the width direction of the diaper 1. It is a positional relationship that passes.

  When pulling the fastening tape 61 left and right, by pinching the portion of the protruding portion 61ap, that is, the vicinity of the central portion of the male material 61m provided on the protruding portion 61ap (that is, the vicinity of the central position hcp) A force (tensile force) can be efficiently applied to the outside in the width direction. That is, since a tensile force acts along the center line CL connecting the center positions hcp of the engaging portions provided on both sides in the width direction, the center line CL is disposed so as to pass through the non-existing portion 1 kbn. A force outside in the width direction can be directly applied to the non-existing portion 1 kbn. In particular, if the center line CL passes through the non-existing portion 1 kbn at the central portion in the width direction, it becomes easy to apply force evenly to the entire non-existing portion 1 kbn. Thereby, the non-existing portion 1 kbn is evenly stretched, and the occurrence of local wrinkles is suppressed.

  In addition, in the diaper 1 of this embodiment, it has the protrusion part 61ap in two places of the longitudinal direction of the fastening tape 61, and the male material 61m (engagement part) is each provided in each protrusion part 61ap. Accordingly, it becomes possible to engage the two pairs of engaging portions with the target tape 65, and when the diaper 1 is worn, the fit of the waistline portion is enhanced and the force acting on each engaging portion is dispersed. Can do. Thereby, it can suppress that an engaging part peels unintentionally at the time of mounting | wearing of the diaper 1, and it becomes easy to keep the diaper 1 in the mounting | wearing form as FIG.

  In such a case, of the two protrusions 61ap in the longitudinal direction, the protrusion 61ap closer to the position where the waistline elastic member 71 is disposed is the target of the pulling. Therefore, the center line CL is set for the male material 61m (engagement portion) of the protrusion 61ap on the outer side in the longitudinal direction. Then, the center line CL passes through the non-existing portion 1 kbn in the center portion in the width direction. The back side portion 1 b of the diaper 1 is contracted in the width direction by the contraction force of the waistline elastic member 71. For this reason, when the fastening tape 6 is pulled outward in the width direction, the contracted portion can be easily stretched by pulling a region as close to the waistline elastic member 71 as possible in the longitudinal direction. In addition, the protrusion 61ap and the engagement part may be provided in three or more locations along the longitudinal direction. In this case as well, the protrusion at the position closest to the position where the waistline elastic member 71 is disposed in the longitudinal direction. A center position hcp is set for 61 ap (engagement portion), and a straight line connecting the center positions hcp is a center line CL.

  The “predetermined position wp”, which is the reference position in the width direction when determining the center position hcp of the male material 61m (engagement portion), is normally the center position in the width direction of the male material 61m. However, it does not have to be exactly the center in the width direction, and may be a position shifted from the center in the width direction. Further, the predetermined position wp may be the inner end in the width direction or the outer end in the width direction of the male material 61m. In FIG. 6, the male member 61m has a rectangular shape, but may be a circular shape, a triangular shape, or other shapes as long as the center position hcp can be set.

  At this time, it is desirable that the innermost portion 42b1p, which is the inner end portion in the longitudinal direction, of the first fixed portion 42b1 is present on the outer side in the longitudinal direction from the position through which the center line CL passes. In other words, it is desirable that the first fixing portion 42b1 does not exist on the line through which the center line CL passes.

  Since the 1st fixing | fixed part 42b1 is being fixed in the state piled up on the top sheet 21, the rigidity of the main-body part 1k is high in the said fixing | fixed part. When the center line CL passes through such a portion, the outward pulling force in the width direction that should act along the center line CL is less likely to act on the portion of the first fixed portion 42b1, and the non-existing portion 1kbn is reduced. It becomes difficult to stretch evenly. On the other hand, by arranging the innermost portion 42b1p of the first fixing portion 42b1 on the outer side in the longitudinal direction with respect to the center line CL, the pulling force toward the outer side in the width direction can easily act on the entire non-existing portion 1kbn. It is easier to suppress the occurrence of problems such as wrinkles in the non-existing portion 1 kbn.

  Moreover, in this embodiment, when the position of the outer end in the longitudinal direction at the predetermined position wp in the width direction is set to the outer end position hop for the male material 61m (engagement portion), a pair provided on both sides in the width direction of the diaper 1 It is desirable that the straight line OL connecting the outer end positions hop of the male members 61m and 61m along the width direction pass through a portion where the waistline elastic member 71 is disposed. Note that the outermost position in the longitudinal direction of the male material 61m may be set as the outer end position hop.

  Thereby, when the fastening tape 61 is pulled outward in the width direction, a pulling force is easily applied to the waistline elastic member 71, and the waistline elastic member 71 is extended outward in the width direction without being loosened. Therefore, the non-existing portion 1 kbn formed adjacent to the waistline elastic member 71 can be easily extended in the width direction without slackening.

  Moreover, when the position of the longitudinal direction inner side end in the predetermined position wp of the width direction about the male material 61m (engagement part) is set to the inner end position hip, a pair of male materials 61m provided on both sides of the width direction of the diaper 1, It is desirable that the straight line IL connecting the inner end position hip of 61 m along the width direction passes through a portion where the absorbent core 11 is disposed. The innermost position in the longitudinal direction of the male material 61m may be set as the inner end position hip.

  Thereby, when the fastening tape 61 is pulled outward in the width direction, a tensile force is easily applied to the absorbent core 11, and the absorbent core 11 is extended outward in the width direction without being loosened. Therefore, the non-existing portion 1 kbn formed adjacent to the absorbent core 11 can be easily extended in the width direction without slackening.

  Moreover, in this embodiment, in the area | region of the back side part 1b, the solid gathering part of the edge part area | region of the width direction of the top sheet 21 and the area | region which the waist elastic member 71 can expand-contract in the width direction are thickness direction. And are joined to each other by a hot melt adhesive or the like.

  By setting it as such a structure, the pulling force at the time of pulling the fastening tape 61 to the width direction outer side becomes easy to act on a solid gather formation part. That is, as the waistline elastic member 71 extends outward in the width direction due to the pulling 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 gather forming portions. The part is prevented from falling inward in the width direction. That is, the three-dimensional gather forming portion is easily raised in that region, and it is easy to suppress excrement and the like from leaking out of the diaper 1.

  Further, in the present embodiment, the back side flap 1bsf and the fastening tape 61 are configured as different parts, and the fastening tape 61 is joined to the outer end in the width direction of the back side flap 1bsf by a hot melt adhesive or the like. .

  As a result, the two sheet members constituting the back side flap 1bsf and the fastening tape 61 are overlapped in the thickness direction at the joint portion. In other words, the fastening tape 61 is sandwiched between the three-dimensional gather sheet 47 and the exterior sheet 31, and there are three sheet members in the thickness direction of the joint portion. Therefore, the strength at the overlapping portion (that is, the joint portion) between the back side flap 1bsf and the fastening tape 61 is increased, and even when the fastening tape 61 is pulled strongly to the left and right, the joint portion is prevented from being broken or peeled off. .

  Suppose that the back side flap 1bsf and the fastening tape 61 are constituted by one member. When the fastening tape 61 is pulled left and right in this state, stress is applied at a boundary portion (corresponding to a portion represented by 61e in FIG. 6) between the portion forming the back side flap 1bsf and the portion forming the fastening tape 61. May concentrate and the fastening tape 61 may tear from that portion. On the other hand, by joining both as separate members as in the present embodiment, the strength of the boundary portion can be increased to such an extent that the tensile force by the fastening tape 61 can be withstood.

=== 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.

  The disposable 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 disposable 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. Further, since the end of the urine absorbing pad is inserted into the pocket-shaped space SP, the urine placed on the skin side of the top sheet 21 when the disposable 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. Furthermore, when using the disposable diaper 1 as in the embodiment, the center of the width direction of the disposable diaper and the center of the absorbent pad in the width direction are set using the vicinity of the end on the back side formed in a shape close to an arc as a mark. Positioning becomes easy.

FIG. 7 is an enlarged schematic plan view (plan view seen from the skin side) showing the back side portion 1b of the disposable diaper 1 according to the present embodiment in a natural state. As shown in FIG. 7, a pair of first three-dimensional gathers spaced apart in the width direction are provided along the longitudinal direction in the main body portion, and a pair of first three-dimensional gathers are disposed outside the first three-dimensional gathers in the width direction. A two-dimensional gather is provided along the longitudinal direction, and the first three-dimensional gather has a first base member that has a first elastic member disposed in the longitudinal direction and cannot stand up, and the first base end. The first upright portion that can stand on the skin side in the thickness direction is arranged side by side in the width direction, and the second three-dimensional gather has a second elastic member arranged in the longitudinal direction and cannot stand up. A second base end portion and a second stand up portion that can stand on the skin side in the thickness direction with the second base end portion as a fulcrum, and are arranged in the width direction. The back side end of the first solid gather is fixed in a state of being overlapped with the main body. A second fixing portion for fixing the second three-dimensional gather in a state of being overlapped with the main body portion is formed at the back side end portion of the second upright portion, The first fixing portion and the elastic region of the waistline elastic member overlap each other, the first fixing portion exists outside the absorbent core in the longitudinal direction, and the second fixing portion sandwiches the first fixing portion. And it is good also as an absorbent article characterized by being spaced apart from the expansion-contraction area | region of the said waist elastic member in the said width direction.
Further, the following modifications are possible.

  As FIG. 7 shows, the said 2nd fixing | fixed part exists in the outer side in the said longitudinal direction rather than the said absorbent core, The absorbent article characterized by the above-mentioned.

  As shown in FIG. 4, the shape of the edge in the longitudinal direction of the absorbent core is such that the central portion in the width direction is more outward in the longitudinal direction than the end portion in the width direction. Absorbent article characterized by having a curved shape protruding to the right.

  As shown in FIG. 7, the waistline elastic member includes a plurality of thread-like elastic members along the width direction, and among the first fixed portions, the innermost fixed end in the longitudinal direction is the non-existing portion. And at least a part of the first 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. An absorbent article characterized by having

  As shown in FIG. 7, the first 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. Absorbent article.

  As shown in FIG. 7, the back-side end portion is located outside the outermost thread-like elastic member in the longitudinal direction and contracts as the thread-like elastic member contracts, and is adjacent to the back-end edge. An absorptive article characterized in that a contraction region longer in the longitudinal direction than an interval between the matching elastic elastic members is formed.

  As shown in FIG. 7, the length in the longitudinal direction of the contraction region is more 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. Absorbent article characterized by its long length.

  In addition, the following modes are possible. FIGS. 8-10 is a schematic plan view which expands and shows the back side part 1b of the disposable diaper 1 which concerns on other embodiment.

(Aspect 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 2)
As shown in FIGS. 8 to 10, the contraction force of the upright portion is applied from an elastic member provided in the upright portion 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 3)
As shown in FIGS. 8 to 10, the absorbent article is 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.

  FIG. 11A is a diagram illustrating a slit provided in the disposable diaper 1. FIG. 11B is a longitudinal sectional view of the diaper 1 in a state of being folded in three.

  As shown in FIG. 11A, the absorbent core 11 may be provided with a low-weight area such as a slit. 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. That is, at least the central region in the width direction of the absorbent core 11 is formed with a lower basis weight than the other regions of the absorbent core 11. In this way, by forming the center area (a part of the center area) in the width direction of the absorbent core 11 with a low basis weight, it becomes easy for wrinkles to enter the low basis weight part. It can be used as a mark when wearing the sexual pad). Therefore, alignment with the center of the width direction of the disposable diaper 1 and the center of a wearer's body (or the center of the width direction of an absorbent pad) becomes easier. In addition, when wearing a pad, if the disposable diaper is worn from the outside after fitting the absorbent pad to the body, the absorbent body will bend easily in the longitudinal direction starting from the slit, and the absorbent body will be folded in the center at the slit. Therefore, the absorbent pad can be pressed firmly against the body. Furthermore, the absorbent core 11 has a larger basis weight than the central region as it goes to the side in the width direction, so that the position of the absorbent pad is less likely to shift, and cracking of the absorbent core can be prevented even during the manufacturing process.

  In addition, the diaper 1 before use is folded in the longitudinal direction. As shown in FIG. 11A, the diaper 1 is provided with three folds, a first fold F1 to a third fold F3. The first fold F1 is formed so as to pass through the region of the nonexistent portion 1 kbn along the width direction. The second fold line F2 is formed so as to pass through a region between the slit S1c and the slit S1b in the longitudinal direction along the width direction. The third fold line F3 is formed so as to pass through a region between the slit S1b and the slit S1a in the longitudinal direction along the width direction. The non-existing portion 1 kbn where the first fold F1 is formed has low rigidity as described above. Moreover, since the 2nd fold F2 and the 3rd fold F3 are formed in the smooth area | region which does not have slit S1a-S1c, the resistance at the time of bending to a longitudinal direction is small. Therefore, it becomes easy to fold the diaper 1 in the longitudinal direction by using these folds as base points.

  When the diaper 1 is folded in three, first, with respect to the unfolded diaper 1, the back end 1 kbeL is folded to the non-skin side in the thickness direction with the first fold F1 as a base point. Next, it folds so that the part of the back side part 1b of the main-body part 1k may face the part of the crotch part 1m and the skin side surfaces in the thickness direction with the second fold F2 as a base point. Next, it folds so that the skin surface side part of the abdominal side part 1a of the main-body part 1k may overlap with the non-skin surface side of the back | dorsal side part 1b of the main-body part 1k on the basis of the 3rd fold F3. By doing in this way, the diaper 1 can be folded in a compact state as shown in FIG. 3B. Further, since the first fold F1 is formed so as to pass through the region of the non-existing portion 1 kbn among the plurality of folds, the non-existing portion having low rigidity is likely to be creased. Thereby, when the diaper 1 is put on, the pocket-shaped space SP can be easily formed.

1 disposable 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 (back 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 waistline elastic member, 72 elastic region,
SP pocket-shaped space,
F pulling force, F2 pulling force

The main invention for achieving the above object is:
A main body portion having a longitudinal direction, a width direction, and a thickness direction, and having a belly side portion, a crotch portion, and a back side portion aligned in the longitudinal direction, is an absorbent article having an absorbent core,
A waistline elastic member is provided along the width direction at the back end portion in the longitudinal direction of the main body portion,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the back end portion, and a portion between the waistline elastic member and the absorbent core in the main body portion. Is a non-existing portion where the waistline elastic member and the absorbent core do not exist,
The main body part is provided with a sheet-like three-dimensional gather forming part spaced apart in the width direction along the longitudinal direction,
The three-dimensional gather forming portion includes a three-dimensional gather elastic member 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. It is arranged side by side in the width direction, and the standing part shrinks in the longitudinal direction, so that the standing part stands on the skin side in the thickness direction,
A fixing portion that fixes 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 inner end portion in the longitudinal direction of the fixing portion is , Present outside in the longitudinal direction than the absorbent core,
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 abdominal side 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, Pass through the non-existing portion in the center of the absorbent article in the width direction ,
The inner end portion in the longitudinal direction of the fixed portion is located in the non-existing portion, and the inner end portion is located outside the longitudinal direction with respect to the center line. It is a sex product.

Claims (11)

A main body portion having a longitudinal direction, a width direction, and a thickness direction, and having a belly side portion, a crotch portion, and a back side portion aligned in the longitudinal direction, is an absorbent article having an absorbent core,
A waistline elastic member is provided along the width direction at the back end portion in the longitudinal direction of the main body portion,
In the main body portion, the absorbent core is present in a portion on the inner side in the longitudinal direction from the back end portion, and a portion between the waistline elastic member and the absorbent core in the main body portion. Is a non-existing portion where the waistline elastic member and the absorbent core do not exist,
The main body part is provided with a sheet-like three-dimensional gather forming part spaced apart in the width direction along the longitudinal direction,
The three-dimensional gather forming portion includes a three-dimensional gather elastic member 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. It is arranged side by side in the width direction, and the standing part shrinks in the longitudinal direction, so that the standing part stands on the skin side in the thickness direction,
A fixing portion that fixes 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 inner end portion in the longitudinal direction of the fixing portion is , Present outside in the longitudinal direction than the absorbent core,
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 abdominal side 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,
The absorbent article according to claim 1, wherein an inner end portion in the longitudinal direction of the fixed portion is present outside in the longitudinal direction with respect to a position through which the center line passes. The absorbent article according to claim 1 or 2,
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 in that it passes through a portion of the main body where the waistline elastic member is disposed. The absorbent article according to any one of claims 1 to 3,
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. The absorbent article according to any one of claims 1 to 4,
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 at a position closest to the position where the waistline elastic member is disposed in the longitudinal direction among the plurality of engaging portions provided in the longitudinal direction. Absorbent article characterized by passing through. An absorbent article according to any one of claims 1 to 5,
An absorptive article, wherein a region that can be expanded and contracted in the width direction of the waistline elastic member and the three-dimensional gather forming portion are overlapped and joined. The absorbent article according to any one of claims 1 to 6,
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. The absorbent article according to any one of claims 1 to 7,
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 of the areas where the plurality of folds are formed passes through the non-existing portion, and the absorbent article. The absorbent article according to any one of claims 1 to 8,
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. Absorbent article characterized by. The absorbent article according to any one of claims 1 to 9,
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. The absorbent article according to any one of claims 1 to 10,
The waistline elastic member includes a plurality of thread-like elastic members along the width direction,
Of the first fixed part, the innermost fixed end in the longitudinal direction is located in the non-existing part,
At least a part of the first 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 characterized by.

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