JP2024100519A - Disposable diaper - Google Patents

Abstract

To provide a disposable diaper which suppresses an increase in bulkiness by contraction of a part with elastic strechability, and obtains excellent appearance and touch.SOLUTION: In a disposable diaper 1, an absorbent body 10 is provided with a pair of leak proof cuffs 6, 6 extending along a vertical direction that are arranged on both sides in a horizontal direction Y. The leak proof cuff 6 is provided with a cuff elastic member 61 along its free end and has a cuff stretchable area 63 where the cuff elastic member 61 exhibits elastic stretchability in the state that it is fixed to a sheet material 60. In the state that the disposable diaper 1 is folded into two along the horizontal direction Y at a position where a total length in a vertical direction X is evenly divided into two, a position of a front end 63a to be an end on an abdominal side part A side of the cuff stretchable area 63 and a position of a rear end 63b to be an end on a back side part B side are separate from each other in a double-folded vertical direction X1 along the vertical direction X.SELECTED DRAWING: Figure 4

Description

The present invention relates to a disposable diaper.

Disposable diapers generally have elastically stretchable portions on both sides of the absorbent body including the absorbent core or on the lateral outer sides of the absorbent body. For example, disposable diapers are known that have leakproof cuffs that are arranged on both sides of the absorbent body and have elastic members, leg elastic members that are arranged around the legs of the wearer when worn and form leg gathers, and elastic members that raise both sides of the absorbent core along both longitudinal edges of the absorbent core (Patent Documents 1 to 4).

JP 2012-16435 A JP 2018-79058 A JP 2020-69168 A JP 2020-108744 A

In disposable diapers, the elastically stretchable parts arranged on both sides of the absorbent body or laterally outward of the absorbent body contribute to preventing side leakage of excrement and improving the fit by shrinking. However, the shrinkage can cause large wrinkles in the disposable diaper. In this case, there is a risk that the wrinkles will increase the bulk of the disposable diaper and reduce the appearance and feel (touch) of the disposable diaper. In the disposable diapers described in Patent Documents 1 to 4, no particular consideration was given to these issues caused by shrinkage of the elastically stretchable parts.

Therefore, the present invention relates to a disposable diaper that suppresses the increase in bulk due to shrinkage of elastically stretchable parts, and has excellent appearance and feel.

The present invention relates to a disposable diaper comprising an absorbent main body including an absorber and an outer body arranged on the non-skin-facing side of the absorbent main body, the diaper having a ventral side portion arranged on the ventral side of a wearer, a dorsal side portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral side portion and the dorsal side portion, the diaper having a vertical direction extending from the ventral side portion via the crotch portion to the dorsal side portion, and a horizontal direction perpendicular to the vertical direction.
In one embodiment, the absorbent body includes a pair of leak-proof cuffs arranged on both sides in the lateral direction and extending along the longitudinal direction,
The leakage preventing cuff preferably has a cuff elastic member disposed along its free edge, and has a cuff stretchable region which exhibits elastic stretchability when the cuff elastic member is fixed to the sheet material.
In one embodiment, when the disposable diaper is folded in half along the horizontal direction at a position that divides the entire vertical length in half, it is preferable that the position of the front end, which is the end on the ventral side of the cuff stretch region, and the position of the rear end, which is the end on the dorsal side, are spaced apart from each other in the folded vertical direction along the vertical direction.

The disposable diaper of the present invention suppresses the increase in bulk due to shrinkage of elastically stretchable areas, resulting in excellent appearance and texture.

FIG. 1 is a plan view showing a disposable diaper according to one embodiment of the present invention in an unfolded and extended state. FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is a cross-sectional view taken along the longitudinal direction, which diagrammatically shows the disposable diaper shown in FIG. 1 folded in half in a longitudinally stretched state. FIG. 4 is a cross-sectional view of a disposable diaper in its natural state, which corresponds to FIG. 3, for illustrating the effect of the present invention. FIG. 5 is an enlarged plan view of the ventral portion shown in FIG. FIG. 6 is an enlarged plan view of the rear side portion shown in FIG. FIG. 7 is an enlarged plan view showing another embodiment of the cuff non-elastic area.

The present invention will be described below based on preferred embodiments with reference to the drawings. Figures 1 to 6 show a pants-type disposable diaper 1 (hereinafter simply referred to as "diaper 1"), which is one embodiment of the disposable diaper of the present invention. The diaper 1 has a ventral portion A arranged on the ventral side of a wearer when worn, a dorsal portion B arranged on the dorsal side of the wearer, and a crotch portion C located between the ventral portion A and the dorsal portion B. The diaper 1 has a longitudinal direction X corresponding to the direction corresponding to the front-rear direction of the wearer, i.e., the direction extending from the ventral portion A through the crotch portion C to the dorsal portion B, and a lateral direction Y perpendicular to the longitudinal direction X. The longitudinal direction X coincides with the longitudinal direction of an absorbent body 10 described later.
The diaper 1 comprises an absorbent body 10 and an exterior body 3 arranged on the non-skin facing side of the absorbent body 10. The exterior body 3 forms the non-skin facing side of the diaper 1, i.e., the outer surface of the diaper 1.

In this specification, the "skin-facing side" refers to the side of the disposable diaper or its constituent members (e.g., top sheet 12) that faces the wearer's skin when the disposable diaper is worn, i.e., the side that is relatively closer to the wearer's skin, and the "non-skin-facing side" refers to the side of the disposable diaper or its constituent members that faces the opposite side from the skin when the disposable diaper is worn, i.e., the side that is relatively farther from the wearer's skin. Note that "when worn" or "worn state" refers to the normal, proper wearing position, i.e., the state in which the disposable diaper is maintained in the correct wearing position.

As shown in FIG. 1, the diaper 1 is formed symmetrically with respect to a longitudinal centerline CLy which extends in a longitudinal direction X and divides the diaper 1 into two equal parts in a transverse direction Y when the diaper 1 is in an unfolded and stretched state.
The "unfolded and stretched state" of the diaper 1 refers to a state in which the diaper 1 is unfolded by cutting the diaper 1 at the side seal portions S described below, and the diaper 1 in the unfolded state is stretched to its designed dimensions (the same dimensions as when the diaper 1 is unfolded in a flat state with no effect of the elastic members). In this specification, each dimension of each part of the diaper 1, such as the length in the longitudinal direction X or the lateral direction Y, refers to the dimension (design dimension) when the elastic members in each part are stretched and each member is stretched, unless otherwise specified.

As shown in FIG. 2, the absorbent body 10 comprises a liquid-permeable top sheet 12, a leak-proof sheet 13, a liquid-retentive absorbent body 4 interposed between these sheets 12, 13, and a pair of leak-proof cuffs 6, 6. In the absorbent body 10, the top sheet 12, the absorbent body 4, the pair of leak-proof cuffs 6, 6, and the leak-proof sheet 13 are integrated together by known joining means such as adhesives. The absorbent body 10 has a rectangular shape that is long in the vertical direction X in a plan view, and extends in the vertical direction X from the ventral part A to the dorsal part B.

As shown in FIG. 1, the absorbent body 4 has a rectangular shape in plan view and is continuous in the vertical direction X from the ventral portion A to the dorsal portion B. The longitudinal direction of the absorbent body 4 coincides with the vertical direction X of the diaper 1. The absorbent body 4 is disposed in the center of the lateral direction Y of the outer body 3 described below in plan view, and is bonded to the leakproof sheet 13 with an adhesive.

The absorbent body 4 includes a liquid-retentive absorbent core 40 and a core wrap sheet 46 that covers the outer surface of the absorbent core 40 (see Figs. 1 and 2).
1 and 2, the absorbent core 40 of this embodiment is a laminated core in which an upper core 41 and a lower core 43 located on the non-skin facing side of the upper core 41 are laminated. The absorbent core 40 has a pair of side fold guide portions 45s, 45s spaced apart in the lateral direction Y and extending in the longitudinal direction X, and a central fold guide portion 45c extending in the longitudinal direction X between the pair of side fold guide portions 45s, 45s. These fold guide portions 45s, 45s, 45c are disposed at least in the crotch portion C.

In the absorbent core 40 of this embodiment, a pair of side fold guide portions 45s, 45s are formed in the lower core 43, and a central fold guide portion 45c is formed in each of the upper core 41 and the lower core 43. The lower core 43 has a side lower core 43s located outside the pair of side fold guide portions 45s, 45s in the lateral direction Y, and a central lower core 43c, 43c located between the pair of side fold guide portions 45s, 45s and outside the central fold guide portion 45c in the lateral direction Y (see FIG. 2). That is, the lower core 43 has a central fold guide portion 45c between the pair of central lower cores 43c, 43c in the lateral direction Y, and a side fold guide portion 45s between the central lower core 43c and the side lower core 43s. The upper core 41 has a pair of central upper cores 41c, 41c outside the central fold guide portion 45c in the lateral direction Y.

In the absorbent core 40 of this embodiment, at least in the crotch portion C, a pair of central lower cores 43c, 43c and a pair of central upper cores 41c, 41c are stacked, and a central fold guide portion 45c is provided between the pair of central lower cores 43c, 43c and between the pair of central upper cores 41c, 41c. In other words, the upper core 41 and the lower core 43 share the central fold guide portion 45c between a pair of side fold guide portions 45s, 45s in the horizontal direction Y.

In the absorbent core 40 of this embodiment, the pair of side lower cores 43s, 43s can be deformed such that they rise toward the wearer's skin from the side fold guide portions 45s, 45s (see FIG. 2). That is, the pair of side lower cores 43s, 43s rise from the central lower cores 43c, 43c from the side fold guide portions 45s.
In addition, the absorbent core 40 of this embodiment can be deformed such that the pair of central upper cores 41c, 41c and the pair of central lower cores 43c, 43c are folded in a mountain fold starting from the central fold guide portion 45c (not shown).

In this embodiment, the side fold guide portions 45s, 45s and the central fold guide portion 45c in the absorbent core 40 are through holes extending in the vertical direction X and penetrating the absorbent core 40. Alternatively, the side fold guide portions 45s, 45s and the central fold guide portion 45c may be recesses formed on the skin-facing surface or non-skin-facing surface of the absorbent core 40. In this case, it is preferable that the position of the central fold guide portion 45c in the upper core 41 and the position of the central fold guide portion 45c in the lower core 43 overlap in a plan view.

In the absorbent body 10, an absorbent elastic member 48 extending in the vertical direction X is disposed on a side portion along the vertical direction X of the absorbent body 4. The side portion of the absorbent body 4 is a region on both sides when the entire width (length in the horizontal direction Y) of the absorbent body 4 including the core wrap sheet 46 is divided into three equal regions by dividing the entire width into three regions. The absorbent elastic member 48 of this embodiment is disposed adjacent to the side edge of the absorbent body 4 in the horizontal direction Y and in a stretched state in the vertical direction X, forming an absorbent stretch region 49 that exhibits elastic stretchability.
The absorber elastic members 48 contract in the longitudinal direction X to assist the deformation of the side lower cores 43s starting from the side folding guide portions 45s. In other words, the side lower cores 43s become more likely to deform so as to be lifted toward the wearer's skin.

The absorber elastic member 48 is disposed on the non-skin facing side of the topsheet 12 and on the skin facing side of the leakproof sheet 13. The absorber elastic member 48 may be disposed spaced apart from the absorber 4 in the lateral direction Y. In this case, the absorber elastic member 48 is preferably disposed in an area within 5 mm outward in the lateral direction Y from the side edge of the absorber 4.
In this embodiment, the absorbent body elastic member 48 is disposed between the topsheet 12 and the core wrap sheet 46, but instead, it may be disposed between the core wrap sheet 46 and the absorbent core 40. The absorbent body elastic member 48 may be located on the skin-facing side of the absorbent body 4, or on the non-skin-facing side.

The absorbent body 10 has an absorbent body stretchable region 49 in which the absorbent body elastic member 48 exhibits elastic stretchability. The absorbent body stretchable region 49 has a front end 49a (hereinafter also referred to as the "absorbent body stretchable front end 49a") which is the end of the region 49 on the ventral side A side, and a rear end 49b (hereinafter also referred to as the "absorbent body stretchable rear end 49b") which is the end of the region 49 on the dorsal side B side (see FIG. 1). That is, the absorbent body 10 exhibits elastic stretchability between the absorbent body stretchable front end 49a and the absorbent body stretchable rear end 49b in the vertical direction X.
The absorbent body stretchable region 49 exhibits elastic stretchability since the stretched state is maintained by fixing the absorbent body elastic member 48 to a sheet material such as the topsheet 12 or the core wrap sheet 46 .

As shown in FIG. 1, the absorbent body 10 has a pair of leak-proof cuffs 6, 6 on both sides along the vertical direction X on the skin-facing surface. That is, the pair of leak-proof cuffs 6, 6 are arranged on both sides of the absorbent body 10 in the horizontal direction Y and extend along the vertical direction X. As shown in FIG. 2, the leak-proof cuff 6 of this embodiment is formed by folding a liquid-resistant or water-repellent and breathable cuff-forming sheet 60 in half along the vertical direction X and joining the two opposing cuff-forming sheets 60, 60. The leak-proof cuff 6 of this embodiment has a cuff elastic member 61 between the two opposing cuff-forming sheets 60, 60. The cuff elastic member 61 is arranged at the inner end of the leak-proof cuff 6 in the horizontal direction Y (see FIGS. 1 and 2). More specifically, the cuff elastic member 61 is arranged near the crease where the cuff-forming sheet 60 is folded in half. The cuff elastic members 61 are arranged in a stretched state in the longitudinal direction X. Each leak-proof cuff 6 has a base end that is fixed between the absorbent body 4 and the leak-proof sheet 13 at least in the crotch region C, and a free end to which the cuff elastic members 61 are fixed. The leak-proof cuff 6 is designed so that the free end stands up at least in the crotch region C when the cuff elastic members 61, arranged in a stretched state in the longitudinal direction X, contract along the free end (see FIG. 2).

The leak-proof cuff 6 of this embodiment has a cuff stretchable region 63 in which the cuff elastic member 61 exhibits elastic stretchability when fixed to the cuff-forming sheet 60 (sheet material), and a cuff non-stretchable region 65 in which the cuff elastic member 61 does not exhibit elastic stretchability outside the cuff stretchable region 63 in the longitudinal direction X (see FIG. 1). The cuff stretchable region 63 is made stretchable in the longitudinal direction X by fixing the stretched cuff elastic member 61 between the two cuff-forming sheets 60, 60 by a known joining means such as an adhesive. In this cuff stretchable region 63, the cuff-forming sheet 60 can follow the stretching of the cuff elastic member 61. In the natural state of the diaper 1, the contraction of the cuff elastic member 61 causes fine wrinkles in the cuff-forming sheet 60 (not shown). The "natural state" refers to a state in which no external force is applied to the diaper 1, and in which the elastic stretchability of each elastic member of the diaper 1 can be expressed.

In the present embodiment, the cuff non-stretchable region 65 has the cuff elastic member 61 not fixed to the cuff forming sheet 60. As a result, the cuff elastic member 61 is in an unstretched state and does not exhibit elastic stretchability. In the cuff non-stretchable region 65, the cuff forming sheet 60 is joined to the top sheet 12, and the leakage preventing cuff 6 is in a non-standing state. In this embodiment, at the longitudinal end portion of the leakage preventing cuff 6 in the X direction, a region 64 where the leakage preventing cuff 6 is in a non-standing state (hereinafter also referred to as the "non-standing region 64") coincides with the cuff non-stretchable region 65 (see FIG. 1), but this is not limited to this form.
For example, as shown in Fig. 7, the cuff non-stretchable region 65 may have a non-standing region 64 and a region 65a where the leakage preventing cuff 6 is in an upstanding state (also referred to as a "non-stretchable standing region 65a"). In this non-stretchable standing region 65a, the cuff elastic member 61 does not exhibit elastic stretchability, but since the cuff forming sheet 60 and the top sheet 12 are not joined, the leakage preventing cuff 6 stands up as the cuff stretchable region 63 contracts. In the non-standing region 64 shown in Fig. 7, there is a joint 64a that joins the cuff forming sheet 60 and the top sheet 12, and the leakage preventing cuff 6 is in a non-standing state due to the joint 64a.

The cuff stretch region 63 has a front end 63a (hereinafter also referred to as the "cuff stretch front end 63a") which is the end of the region 63 on the ventral side A side in the vertical direction X, and a rear end 63b (hereinafter also referred to as the "cuff stretch rear end 63b") which is the end of the region 63 on the dorsal side B side in the vertical direction X. In other words, the leakproof cuff 6 exhibits elastic stretchability between the cuff stretch front end 63a and the cuff stretch rear end 63b in the vertical direction X.

The exterior body 3 comprises an outer layer sheet 31 forming the outer surface, i.e., the non-skin facing surface, of the diaper 1, and an inner layer sheet 32 located on the skin facing side of the outer layer sheet 31 (see Figs. 1 and 2). In the exterior body 3, the leakproof sheet 13 and the inner layer sheet 32, as well as the inner layer sheet 32 and the outer layer sheet 31, adjacent to each other in the thickness direction Z of the diaper 1, are bonded together with an adhesive.
In the exterior body 3, both side edges along the longitudinal direction X of the exterior body 3 in the ventral portion A and the dorsal portion B are joined to each other by a known joining means such as an adhesive such as a hot melt adhesive, heat sealing, ultrasonic sealing, etc., to form a pair of side seal portions S, S. This forms a waist opening through which the wearer's torso passes, and a pair of leg openings through which the wearer's lower legs pass (not shown). In other words, the crotch portion C is the region between the side seal portions S in the longitudinal direction X of the diaper 1.
The outer body 3 has leg opening edge portions LS arranged around the legs of a wearer when the outer body 3 is worn. The periphery of the leg opening edge portions LS forms leg openings. The leg opening edge portions LS are formed outward in the lateral direction Y of the absorbent body 4.

The exterior body 3 forms the outer shape of the diaper 1 in an unfolded and stretched state as shown in Fig. 1, and the peripheral edge of the exterior body 3 forms the contour line of the diaper 1 in an unfolded and stretched state, i.e., the contour lines of the abdominal portion A, the crotch portion C, and the back portion B. As shown in Fig. 1, in the crotch portion C, both side edges of the exterior body 3 along the longitudinal direction X are curved in a convex arc shape toward the center in the lateral direction Y, and the central region in the longitudinal direction X is narrowed toward the inside in the lateral direction Y. The exterior body 3 and the absorbent main body 10 are joined by a known joining means such as an adhesive.
In addition, at least one of the outer layer sheet 31 and the inner layer sheet 32 in the exterior body 3 may be folded back toward the skin-facing surface along the peripheral edge WE of the waist opening (hereinafter also referred to as the "waist opening edge WE").

In the exterior body 3, the outer layer sheet 31 forms the outer surface of the diaper 1, i.e., the non-skin facing surface, and the inner layer sheet 32 is disposed on the skin facing surface side of the outer layer sheet 31. The exterior body 3 has a plurality of thread-like or band-like elastic members 35, 36, 37, 38 disposed between the inner layer sheet 32 and the outer layer sheet 31. The exterior body 3 of this embodiment has waist elastic members 35 and waist circumference elastic members 36 disposed along the lateral direction Y in the abdominal side portion A and the back side portion B, leg elastic members 37 disposed along the leg opening edge portions LS forming the leg openings, and lateral elastic members 38 extending in the lateral direction Y at the leg opening edge portions LS of the abdominal side portion A (see FIG. 1).

In the abdominal portion A and the back portion B, the waist elastic members 35 and the waist circumference elastic members 36 are each arranged intermittently at a predetermined interval in the vertical direction X in a stretched state in the horizontal direction Y. The waist elastic members 35 are arranged outside the vertical direction X of the absorbent body 4 in the abdominal portion A and the back portion B, forming a waist stretchable region 3W that is stretchable in the horizontal direction Y (see Figures 5 and 6). The waist stretchable region 3W is arranged between the side seal portions S, S in the horizontal direction Y in a stretched state, and exhibits elastic stretchability. In this way, by having the waist stretchable region 3W at the opening edge of the waist opening, a substantially continuous annular waist gather (pleats) is formed around the entire circumference of the waist opening.

The waist elastic members 36 are arranged laterally outward of the absorbent body 4 in the ventral portion A and the dorsal portion B, forming a waist elastic region 3T that is stretchable in the horizontal direction Y (see FIG. 1). The waist elastic region 3T is located inward in the vertical direction X from the waist elastic region 3W, and overlaps with the absorbent body 4 in the vertical direction X. The waist elastic member 36 is arranged in a stretched state between the side seal portion S and the absorbent body 4 in the horizontal direction Y, and exhibits elastic stretchability in the waist elastic region 3T. While the waist elastic member 36 exhibits elastic stretchability outside the absorbent body 4 in the horizontal direction Y, the region that overlaps with the absorbent body 4 in a plan view is arranged so that it does not exhibit elastic stretchability by processing such as finely dividing it.

At the leg opening edge LS, one or more thread-like or band-like leg elastic members 37 for forming leg gathers are arranged in a stretchable state. The leg elastic members 37 extend from a part of the back side B at the center of the vertical direction X through the crotch part C to a part of the ventral side A at the center of the vertical direction X (see FIG. 1). By arranging the leg elastic members 37 in a stretched state, a substantially continuous annular leg gather is formed around the entire circumference of the opening edge of the leg opening (leg opening edge LS). The leg elastic members 37 are also sandwiched and fixed between the outer layer sheet 31 and the inner layer sheet 32 that constitute the exterior body 3 by a joining means such as an adhesive.

In this embodiment, the leg opening edge portion LS has a lateral elastic member 38 arranged in a stretched state in the lateral direction Y at least on the abdominal side portion A side of the crotch portion C (see FIG. 1).
The lateral elastic members 38 in this embodiment are arranged in the region overlapping with the absorbent body 4 in the lateral direction Y, so as not to exhibit elastic stretchability by processing such as fine division. Such lateral elastic members 38 exhibit elastic stretchability outward in the lateral direction Y from the absorbent body 4. This allows the exterior body 3 to contract in the lateral direction Y in the crotch portion C, ensuring a good fit to the wearer's skin. The exterior body 3 may include one lateral elastic member 38 on each side of the absorbent body 4 in the lateral direction Y, or may include two or more multiple lateral elastic members 38. In the latter case, the multiple lateral elastic members 38 are intermittently arranged in the longitudinal direction X in the exterior body 3.

Fig. 3 shows a cross section of the diaper 1 folded in half along the horizontal direction Y at a position that bisects the entire length in the vertical direction X (hereinafter also simply referred to as the "folded in half state") and stretched in the vertical direction X and the horizontal direction Y. In Fig. 3, in the diaper 1 folded in half, the elastic members contractible in the vertical direction X are in a stretched state, and the elastic members contractible in the horizontal direction Y are in a stretched state. Hereinafter, the state folded in half and stretched in the vertical direction X and the horizontal direction Y is also referred to as the "folded in half and stretched state". Fig. 3 shows the positions of the cuff stretchable front end 63a and the cuff stretchable rear end 63b in the diaper 1 folded in half and stretched state.
The folded-in-half state is a state in which the diaper 1 is folded in half along a horizontal center line CLx (see FIG. 1 ) that halves the entire length of the diaper 1 in the vertical direction X and extends in the horizontal direction Y. The diaper 1 of this embodiment is a pants-type disposable diaper, and the folded-in-half state is a state in which both side edge portions of the exterior body 3 in the vertical direction X of the ventral side portion A and the back side portion B are joined together, i.e., a state in which the side seal portions S, S are formed.
The diaper 1 in a folded state has a folded longitudinal direction X1 along the longitudinal direction X. The folded longitudinal direction X1 corresponds to the longitudinal direction X of the diaper 1 in an unfolded and stretched state. Hereinafter, the "longitudinal direction X" means that the diaper 1 is in a stretched and unfolded state, and the "folded longitudinal direction X1" means that the diaper 1 is in a folded state.

In the diaper 1 of this embodiment, when folded in half, the positions of the cuff stretch front end 63a and the cuff stretch rear end 63b are different from each other in the folded in half vertical direction X1, and these positions are spaced apart in the folded in half vertical direction X1 (see Figures 3 and 4). The diaper 1 has this configuration in common whether the folded diaper 1 is stretched in the vertical direction X (see Figure 3) or in the natural folded diaper 1 state (see Figure 4).

In the diaper 1 of this embodiment, the positions of the cuff stretchable front end 63a and the cuff stretchable rear end 63b are different from each other in the folded-in longitudinal direction X1, so that the bulkiness of the diaper 1 in the folded-in state can be effectively suppressed. More specifically, as shown in Fig. 4, as the cuff stretchable region 63 contracts, the diaper 1 contracts in the folded-in longitudinal direction X1, and folds P1, P2 protruding outward in the thickness direction Z are generated. These folds P1, P2 extend in the lateral direction Y (not shown). The contractile force of the cuff stretchable region 63 tends to be strong at the cuff stretchable front end 63a and the cuff stretchable rear end 63b, and the outer portions of the front end 63a and the rear end 63b of the diaper 1 in the folded-in longitudinal direction X1 are pulled inward in the same direction X1, so that large folds P1, P2 are likely to be generated. In the diaper 1 of this embodiment, the positions of the cuff stretchable front end 63a and the cuff stretchable rear end 63b are spaced apart in the folding longitudinal direction X1, so that the folds P1, P2 are prevented from overlapping when the diaper 1 is folded in half (see FIG. 4). As a result, even though the folds P1, P2 are generated, the folds P1 and P2 are prevented from overlapping with each other, which would increase the bulk of the diaper 1. This effect is effective in making the diaper 1 compact in appearance with a reduced thickness.
In addition, when multiple diapers with overlapping pleats and increased bulk are packaged together, the constituent fibers of the sheet member in the bulky parts of the diapers tend to be excessively compressed, making the diapers feel hard to the touch. In contrast, the diaper 1 of the present embodiment is able to suppress the increase in bulk as described above, and therefore, even when multiple diapers 1 are packaged together, the constituent fibers of the sheet member are prevented from being compressed, and the diapers can maintain their soft feel before packaging.

The positions of the cuff stretch front end 63a and the cuff stretch rear end 63b in the folded state can be confirmed by visually observing a cross section of the diaper 1 in the folded state along the folded longitudinal direction X1. More specifically, the positions of the cuff stretch front end 63a and the cuff stretch rear end 63b of one of the leakage preventing cuffs 6 are marked with an oil-based pen on the skin-facing surface of the diaper 1, and then the diaper 1 is folded in half. Next, the folded diaper 1 is cut along the folded longitudinal direction X1 at the longitudinal center line CLy to obtain the longitudinal half of the diaper 1 on the side where the one of the leakage preventing cuffs 6 is present. The longitudinal half of the diaper 1 is then folded in half and stretched in the longitudinal direction X1, and a cross section of the longitudinal half is visually observed to determine the positions of the cuff stretch front end 63a and the cuff stretch rear end 63b, marked with an oil-based pen.
The preferable positional relationship and dimensions (such as the separation distance D1 and distance L1 described later) described in detail below can be confirmed or measured on a cross section of the vertical half of the diaper 1.

In order to further suppress the bulkiness of the diaper 1 due to the pleats P1, P2, it is preferable that the cuff stretchable front end 63a and the cuff stretchable rear end 63b are located at the following positions.
In the diaper 1 folded in half and stretched, the distance D1 (see FIG. 3) between the position of the cuff stretched front end 63a and the position of the cuff stretched rear end 63b in the fold longitudinal direction X1 is preferably 3% or more, more preferably 4% or more, and is preferably 27% or less, more preferably 25% or less, of the total length L (see FIG. 3) of the diaper 1 folded in half in the fold longitudinal direction X1, and is preferably 3% or more and 27% or less, more preferably 4% or more and 25% or less.
In the diaper 1 folded in half and stretched, the distance D1 (see Figure 3) between the position of the cuff stretched front end 63a and the position of the cuff stretched rear end 63b in the fold longitudinal direction X1 is preferably 7 mm or more, more preferably 10 mm or more, and is preferably 65 mm or less, more preferably 60 mm or less, and is preferably 7 mm or more and 65 mm or less, more preferably 10 mm or more and 60 mm or less.

In the folded state, it is preferable that the position of the cuff stretchable front end 63a of the cuff stretchable region 63 is outward in the folded longitudinal direction X1 from the position of the cuff stretchable rear end 63b (see FIG. 4). With this configuration, the leakage preventing cuff 6 on the abdominal portion A side can be easily fitted to the wearer's groin, and the overlap between the pleats P1 on the abdominal portion A side and the pleats P2 on the dorsal portion B side can be further suppressed.
From the same viewpoint as above, it is preferable that the distance L1 between the waist opening end WE in the vertical direction X and the cuff stretch front end 63a, and the distance L11 between the waist opening end WE in the vertical direction X and the cuff stretch rear end 63b are within the following ranges.
In the diaper 1 folded in half and stretched, the distance L1 (see FIG. 3) between the waist opening end WE and the cuff stretch front end 63a in the longitudinal direction X is preferably 55% or more, more preferably 60% or more, and preferably 93% or less, more preferably 90% or less, of the distance L11 (see FIG. 3) between the waist opening end WE and the cuff stretch rear end 63b in the longitudinal direction X.

As described above, the absorbent body 10 of this embodiment has the absorber stretchable region 49. Contraction of this absorber stretchable region 49 may easily cause the folds P1, P2 described above. From the viewpoint of further suppressing the overlapping of such folds and further suppressing the bulkiness of the diaper 1, it is preferable that the positions of the absorber stretchable front end 49a and the absorber stretchable rear end 49b are separated from each other in the folding longitudinal direction X1 in the diaper 1 folded in half (not shown). In this case, it is more preferable that the position of the absorber stretchable front end 49a is further outward in the folding longitudinal direction X1 than the position of the absorber stretchable rear end 49b.
In order to ensure the above-mentioned effects, it is preferable that the distance L3 between the waist opening end WE in the longitudinal direction X and the absorbent body stretchable front end 49a, and the distance L13 between the waist opening end WE in the longitudinal direction X and the absorbent body stretchable rear end 49b are within the following ranges.
In the diaper 1 folded in half and stretched, the distance L3 (see FIG. 5) between the waist opening end WE and the stretchable front end 49a of the absorbent body in the longitudinal direction X is preferably 60% or more, more preferably 65% or more, and preferably 93% or less, more preferably 90% or less, of the distance L13 (see FIG. 6) between the waist opening end WE and the stretchable rear end 49b of the absorbent body in the longitudinal direction X.

The positions of the absorber stretchable front end 49a and the absorber stretchable rear end 49b can be confirmed by the following method. First, on the skin-facing surface of the diaper 1, marks are made with an oil-based pen through the top sheet 12 at the positions of the absorber stretchable front end 49a and the absorber stretchable rear end 49b of one of the absorber stretchable regions 49. At this time, the ink of the oil-based pen transfers to the non-skin-facing surface side via the top sheet 12. Next, the diaper 1 is folded in half and stretched, and the non-skin-facing surface side of the diaper 1 is visually inspected, and the position where the ink of the oil-based pen can be confirmed from the non-skin-facing surface is determined to be the position of the absorber stretchable front end 49a or the absorber stretchable rear end 49b. This method can also be applied when the diaper 1 is vertically cut in half.
The preferred positional relationship and dimensions (distances L3, L13 from the waist opening end WE described below, separation distance D5, etc.) of the absorbent body stretchable front end 49a and the absorbent body stretchable rear end 49b in this specification can be confirmed or measured by the method described above.

From the viewpoint of further suppressing the bulkiness, it is preferable that the positions of the ends of the cuff stretchable region 63 and the absorber stretchable region 49 in the longitudinal direction X1 are spaced apart in the folded-in longitudinal direction X1 in at least one of the abdominal portion A and the dorsal portion B in the diaper 1 folded in half. In this case, it is preferable that the positions of the cuff stretchable front end 63a and the absorber stretchable front end 49a are spaced apart in the folded-in longitudinal direction X1, or the positions of the cuff stretchable rear end 63b and the absorber stretchable rear end 49b are spaced apart in the folded-in longitudinal direction X1 in the diaper 1 folded in half.
In order to further suppress the overlapping of the folds P1, P2 due to the contraction of the cuff stretchable region 63 and the contraction of the absorbent body stretchable region 49, and thereby to further suppress the bulkiness of the diaper 1, it is more preferable that, when the diaper 1 is folded in half, the position of the cuff stretchable front end 63a is further outward in the fold longitudinal direction X1 than the position of the absorbent body stretchable front end 49a, and in addition to this configuration, it is even more preferable that, when the diaper 1 is folded in half, the position of the cuff stretchable rear end 63b is further outward in the fold longitudinal direction X1 than the position of the absorbent body stretchable rear end 49b.

In order to further suppress the bulkiness, the distance D5 (see FIG. 5) between the cuff stretchable front end 63a and the absorbent stretchable front end 49a in the stretched and unfolded state of the diaper 1 is preferably 5 mm or more, more preferably 10 mm or more, and is preferably 70 mm or less, more preferably 65 mm or less, and is preferably 5 mm or more and 70 mm or less, more preferably 10 mm or more and 65 mm or less.
From the same viewpoint as above, the distance D15 (see Figure 6) between the cuff stretchable rear end 63b and the absorbent stretchable rear end 49b in the diaper 1 in a stretched and unfolded state is preferably 5 mm or more, more preferably 10 mm or more, and is preferably 60 mm or less, more preferably 55 mm or less, and is preferably 5 mm or more and 60 mm or less, more preferably 10 mm or more and 55 mm or less.

The diaper 1 is provided with the above-mentioned waist stretchable region 3W outward in the longitudinal direction X from the end of the abdominal region A of the absorbent body 4 (see Figs. 1 and 5).
In order to further prevent the folds caused by contraction of the waist stretch region 3W from overlapping with the folds caused by contraction of the cuff stretch region 63, it is preferable that, in the stretched and unfolded state of the diaper 1, the cuff stretch front end 63a is located inward in the longitudinal direction X from the waist stretch region 3W.
In order to ensure that such a configuration is achieved, in the diaper 1 in a stretched and unfolded state, the distance D2 (see FIG. 5) between the waist stretch region 3W and the cuff stretch front end 63a in the longitudinal direction X is preferably 25 mm or more, more preferably 30 mm or more, and is preferably 80 mm or less, more preferably 75 mm or less, and is preferably 25 mm or more and 80 mm or less, more preferably 30 mm or more and 75 mm or less.

The diaper 1 has waist-grip stretchable regions 3T which are stretchable in the lateral direction Y on both sides of the absorbent body 4 in the ventral portion A (see Figs. 1 and 5).
In order to further prevent the folds caused by the contraction of the waist stretch region 3T from overlapping with the folds caused by the contraction of the cuff stretch region 63, it is preferable that, in the stretched and unfolded state of the diaper 1, the cuff stretch front end 63a is located further inward in the lateral direction Y than the inner end of the waist stretch region 3T in the lateral direction Y.
In order to ensure that such a configuration is achieved, in the diaper 1 in a stretched and unfolded state, the distance D3 (see Figure 5) between the inner end in the lateral direction Y of the waist stretchable region 3T and the cuff stretchable front end 63a is preferably 4 mm or more, more preferably 5 mm or more, and is preferably 40 mm or less, more preferably 35 mm or less, and is preferably 4 mm or more and 40 mm or less, more preferably 5 mm or more and 35 mm or less.

It is preferable that the positional relationship in the vertical direction X between the cuff stretch front end 63a and the waist stretch region 3W in the abdominal side portion A described above also applies to the positional relationship in the vertical direction X between the cuff stretch rear end 63b and the waist stretch region 3W in the dorsal side portion B.
In addition, it is preferable that the positional relationship in the lateral direction Y between the cuff stretch front end 63a and the waistline stretch region 3T in the abdominal side portion A also applies to the positional relationship in the lateral direction Y between the cuff stretch rear end 63b and the waistline stretch region 3T in the dorsal side portion B.

As described above, the exterior body 3 is provided with the lateral elastic members 38 at the leg opening edge portions LS of the abdominal portion A (see FIG. 5).
In order to disperse the pleats caused by the contraction of the cuff stretchable region 63, the waist stretchable region 3W and the transverse elastic member 38 and thereby reduce bulkiness of the diaper 1, it is preferable that, in the stretched and unfolded state of the diaper 1, the cuff stretchable front end 63a is located between the waist stretchable region 3W and the transverse elastic member 38 in the longitudinal direction X (see Figure 5).
From the same viewpoint as above, in the diaper 1 in a stretched and unfolded state, the distance D6 (see FIG. 5) between the transverse elastic member 38 and the cuff stretch front end 63a in the longitudinal direction X is preferably 5 mm or more, more preferably 8 mm or more, and is preferably 65 mm or less, more preferably 60 mm or less, and is preferably 5 mm or more and 65 mm or less, more preferably 8 mm or more and 60 mm or less.

The absorbent body 4 of the diaper 1 has a higher rigidity than other portions because it has the absorbent core 40. The absorbent core 40 can be easily deformed by the above-mentioned folding guide portions 45c, 45s, 45s.
From the viewpoint of suppressing twisting of the absorbent body 4 due to contraction of the cuff stretchable regions 63 and further suppressing bulkiness of the diaper 1, in the stretched and unfolded state of the diaper 1, it is preferable that the end portion on the abdominal portion A side of the central fold guide portion 45c is located longitudinally outward from the end portions on the abdominal portion A side of the side fold guide portions 45s, 45s, and in addition to this configuration, it is more preferable that the cuff stretchable front end 63a is located longitudinally outward from the end portion on the abdominal portion A side of the central fold guide portion 45c. That is, it is more preferable that, from the outer side to the inner side in the longitudinal direction X, the cuff stretchable front end 63a, the end portion on the abdominal portion A side of the central fold guide portion 45c, and the end portions on the abdominal portion A side of the side fold guide portions 45s, 45s are located in this order.

From the viewpoint of further suppressing the twisting of the absorbent body 4, in the diaper 1 in a stretched and unfolded state, the distance D7 (see FIG. 5) between the cuff stretch front end 63a and the end of the central fold guide portion 45c on the abdominal portion A side in the longitudinal direction X is preferably 10 mm or more, more preferably 12 mm or more, and is preferably 65 mm or less, more preferably 60 mm or less, and is preferably 10 mm or more and 65 mm or less, more preferably 12 mm or more and 60 mm or less.
From the same viewpoint as above, in the diaper 1 in a stretched and unfolded state, the distance D8 (see FIG. 5) between the ends of the central fold guide portion 45c and the side fold guide portion 45s on the abdominal portion A side in the longitudinal direction X is preferably 10 mm or more, more preferably 12 mm or more, and is preferably 50 mm or less, more preferably 45 mm or less, and is preferably 10 mm or more and 50 mm or less, more preferably 12 mm or more and 45 mm or less.

The absorbent core 40 of this embodiment has a high-rigidity region 47 at the end of the absorbent core 40 in the longitudinal direction X in the abdominal portion A, where neither a pair of side fold guide portions 45s, 45s nor a central fold guide portion 45c exist in the longitudinal direction X (see Figs. 1 and 5). The high-rigidity region 47 is a portion in which the basis weight of the material forming the absorbent core 40 (hereinafter also referred to as "core forming material") is higher than other portions in the absorbent core 40, and thus the high-rigidity region 47 is higher than other portions in the absorbent core 40. The high-rigidity region 47 of this embodiment is formed by the upper core 41 and the lower core 43 in which the fold guide portions 45c, 45s, 45s do not exist.
In order to further prevent twisting of the absorbent body 4 due to contraction of the cuff elasticized regions 63, it is preferable that the cuff elasticized front ends 63a overlap the high stiffness regions 47 when viewed in a plan view of the diaper 1 in a stretched and unfolded state.

From the same viewpoint as above, the basis weight of the absorbent core 40 is preferably within the following range: The basis weight of the core-forming material of the high stiffness region 47 is preferably 420 g/m ² or more and 690 g/m ² or less, more preferably 440 g/m ² or more and 660 g/m ² or less.
The basis weight of the core-forming material of the upper core layer 41 is preferably 220 g/m ² or more and 400 g/m ² or less, and more preferably 230 g/m ² or more and 380 g/m ² or less.
The basis weight of the core-forming material of the lower core 43 is preferably 200 g/m ² or more and 380 g/m ² or less, and more preferably 210 g/m ² or more and 370 g/m ² or less.

From the viewpoint of further improving the standability of the leakage preventing cuffs 6 or the deformability of the absorbent core 40 while suppressing the bulkiness, it is preferable that the elongation percentage of the cuff elastic members 61 and the absorber elastic members 48 is within the following ranges. Such elongation percentage is the elongation percentage in the cuff elastic regions 63 or the absorber elastic regions 49.
The elongation rate of the cuff elastic member 61 is preferably 1.10 times or more, more preferably 1.15 times or more, and is preferably 1.80 times or less, more preferably 1.75 times or less, and is preferably 1.10 times or more and 1.80 times or less, more preferably 1.15 times or more and 1.75 times or less, relative to the elongation rate of the absorbent body elastic member 48.
The elongation ratio of the cuff elastic member 61 is preferably 2.00 times or more, more preferably 2.05 times or more, and is preferably 2.65 times or less, more preferably 2.60 times or less, and is preferably 2.00 times or more and 2.65 times or less, and more preferably 2.05 times or more and 2.60 times or less.
The elongation ratio of the absorbent elastic member 48 is preferably 1.40 times or more, more preferably 1.42 times or more, and is preferably 1.85 times or less, more preferably 1.80 times or less, and is preferably 1.40 times or more and 1.85 times or less, and more preferably 1.42 times or more and 1.80 times or less.
The elongation rate is measured by the following method.

[Method of measuring elongation rate]
The diaper 1 is separated at the side seal portion S and placed in a natural (contracted) state, and two marks are made with an oil-based pen at the position from the surface of the diaper 1 where each elastic member is present, with a distance La between them in the direction of extension of each elastic member. The diaper 1 is then stretched to an unfolded and stretched state (see FIG. 1), and the length Lb between the two marks is measured. This measurement is performed three times for each elastic member, and the elongation rate (times) is calculated from the arithmetic average value of the values calculated by the formula "Lb/La". The distance La can be, for example, 100 mm, but if the stretchable range is less than 100 mm, the distance La is made as wide as possible.

In this embodiment, the absorbent core 40 has both side edges that are narrowed inward in the lateral direction Y (see FIG. 1). The planar shape of the absorbent core 40 is not limited to this, and can be any shape, such as a rectangle.

In the above-described embodiment, the exterior body 3 has a transverse elastic member 38 only on the ventral portion A side of the crotch portion C. Alternatively, the exterior body 3 may have a transverse elastic member 38 on both the ventral portion A side and the dorsal portion B side of the crotch portion C (not shown).

Materials forming each part of the diaper 1 in the above-mentioned embodiment will now be described in detail. The topsheet 12 and the leak-barrier sheet 13 may each be made of any material that is conventionally used in absorbent articles (disposable diapers) without any particular limitation.
For example, a liquid-permeable nonwoven fabric or a perforated film can be used as the topsheet 12. Examples of the nonwoven fabric include known nonwoven fabrics such as spunbond nonwoven fabric, air-through nonwoven fabric, spunlace nonwoven fabric, heat-rolled nonwoven fabric, and melt-blown nonwoven fabric.
A liquid-impermeable or water-repellent sheet can be used as the leak-proof sheet 13. Such a sheet can be a resin film or a laminate of a resin film and a nonwoven fabric, etc. Examples of the resin film include films made of polymeric materials such as polyethylene terephthalate, polyester, polyethylene, polypropylene, cellophane, nylon, polyvinyl alcohol, polyvinyl chloride, polycarbonate, etc., and moisture-permeable films.

The absorbent body 4 can use, as the absorbent core 40, a laminate of hydrophilic fibers such as wood pulp and synthetic fibers that have been hydrophilically treated, or a laminate of such fibers with absorbent polymer retained therein.
Also, a polymer sheet in which a water-absorbent polymer is supported on a fiber sheet such as a nonwoven fabric can be used as the absorbent 4. An example of such a polymer sheet is that described in JP 2009-022670 A, which is configured by containing a water-absorbent resin powder fixed between two sheets with an adhesive. In pants-type disposable diapers, the absorbent 4 is folded in half at the center in the longitudinal direction X, and when the wrinkles generated in the absorbent 4 overlap each other, the thickness of the diaper 1 increases. It is preferable that the absorbent 4 is made of a polymer sheet, since such an increase in thickness can be further suppressed.

The core wrap sheet 46 may be the same as the top sheet 12. From the viewpoint of being soft even if wrinkles occur and further reducing the thickness, the core wrap sheet 46 is preferably a nonwoven fabric. Examples of nonwoven fabrics include the known nonwoven fabrics mentioned above.

The inner layer sheet 32 and the outer layer sheet 31 in the exterior body 3 can be made of, for example, the known nonwoven fabrics described above. Also, laminated nonwoven fabrics in which nonwoven fabrics are laminated together can be used.

The absorber elastic member 48 in the absorber 4, the cuff elastic member 61 in the leakproof cuff 6, and the elastic members such as the lateral elastic member 38, waist elastic member 36, waist elastic member 35, and leg elastic member 37 in the exterior body 3 can be made of various known elastic materials that are commonly used in this type of absorbent article, without any particular restrictions. Examples of elastic materials include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, elastic polyolefins, and polyurethanes. The elastic members can be preferably in the form of threads (e.g., rubber threads) or strings (e.g., flat rubber) with a cross section of a rectangular, square, circular, or polygonal shape, or multifilament type threads.

Although the present invention has been described based on the preferred embodiments, the present invention is not limited to the above-described embodiments.
For example, in the diaper of the above-mentioned embodiment, the absorbent core 40 includes the central fold guide portion 45c, but the absorbent core 40 may not include the central fold guide portion 45c. Also, the absorbent core 40 may not include the side fold guide portions 45s, 45s together with the central fold guide portion 45c.
In addition, in the above-mentioned embodiment of the diaper, the leg opening edge portion LS is provided with a transverse elastic member 38 on the ventral portion A side of the crotch portion C, but instead, the diaper may be provided with a transverse elastic member 38 on the ventral portion A side and the dorsal portion B side of the crotch portion C, or may not be provided with a transverse elastic member 38.
Furthermore, the diaper in the above-mentioned embodiment is a pants-type disposable diaper, but instead of this, it may be a so-called flat-type disposable diaper which has a fastening tape on the back side B and is attached by fastening the fastening tape to a landing tape provided on the outer surface of the abdominal side A. In a flat-type disposable diaper, the portion on both side edges having concave cutouts formed to fit the shape of the leg circumference is the crotch portion C, and the portions located in front of and behind this are the back side B and the abdominal side A.

1. Disposable diapers (diapers)
3 Outer body 4 Absorbent body 6 Leak-proof cuff 10 Absorbent body 12 Top sheet 13 Leak-proof sheet 31 Outer layer sheet 32 Inner layer sheet 35 Waist elastic member 37 Leg elastic member 38 Horizontal elastic member 40 Absorbent core 41 Upper layer core 41c Central upper layer core 43 Lower layer core 43c Central lower layer core 43s Side lower layer core 45c Central fold guide portion 45s Side fold guide portion 46 Core wrap sheet 47 High rigidity region 48 Absorbent body elastic member 49 Absorbent body stretchable region 49a Absorbent body stretchable front end 49b Absorbent body stretchable rear end 60 Cuff forming sheet 61 Cuff elastic member 63 Cuff stretchable region 63a Cuff stretchable front end 63b Cuff stretchable rear end 65 Cuff non-stretchable region A Abdominal side portion B Dorsal side portion C Crotch portion CLx Horizontal center line CLy Vertical center line LS Leg opening edge P1, P2 Pleats S Side seal portion WE Waist opening edge X Vertical direction X1 Folded in half Vertical direction Y Horizontal direction Z Thickness direction

Claims (9)

A disposable diaper comprising an absorbent main body including an absorbent body, and an exterior body arranged on a non-skin facing side of the absorbent main body, the disposable diaper having a ventral side portion arranged on a wearer's ventral side, a dorsal side portion arranged on a wearer's dorsal side, and a crotch portion located between the ventral side portion and the dorsal side portion, the disposable diaper having a vertical direction extending from the ventral side portion through the crotch portion to the dorsal side portion, and a horizontal direction perpendicular to the vertical direction,
The absorbent body includes a pair of leak-proof cuffs arranged on both sides in the lateral direction and extending along the longitudinal direction,
The leakage preventing cuff has a cuff elastic member disposed along a free edge thereof, and has a cuff stretchable region that exhibits elastic stretchability in a state where the cuff elastic member is fixed to a sheet material,
When the disposable diaper is folded in half along the horizontal direction at a position that divides the entire length in the vertical direction in half, the position of the front end, which is the end on the ventral side of the cuff stretch region, and the position of the rear end, which is the end on the dorsal side, are spaced apart from each other in the folded-in vertical direction along the vertical direction. The absorbent body has an absorbent elastic member extending in the longitudinal direction arranged on a side portion of the absorbent body along the longitudinal direction, and the absorbent elastic member has an absorbent stretchable region exhibiting elastic stretchability,
2. The disposable diaper according to claim 1, wherein, when the disposable diaper is folded in half, the position of the front end, which is the end on the ventral side of the absorbent stretch region, and the position of the rear end, which is the end on the dorsal side, are spaced apart from each other in the longitudinal direction of the fold. The disposable diaper according to claim 2, wherein in at least one of the abdominal portion and the dorsal portion, the longitudinal ends of the cuff stretch region and the absorbent stretch region are spaced apart in the longitudinal direction when folded in half. The disposable diaper according to any one of claims 1 to 3, wherein, in the folded-in-half state, the front end of the cuff stretchable region is positioned outward in the longitudinal direction of the fold from the rear end. A waist stretch area stretchable in the lateral direction is provided outward in the longitudinal direction from the end of the abdominal portion of the absorbent body,
The disposable diaper according to any one of claims 1 to 4, wherein the front ends of the cuff elastic regions are located inward in the longitudinal direction from the waist elastic region. The absorbent body has a leg opening edge portion that is arranged around the legs of a wearer when the absorbent body is worn, and the leg opening edge portion is formed on the outer side of the absorbent body in the lateral direction.
The leg opening edge portion includes a lateral elastic member disposed in a stretched state in the lateral direction at least on the abdominal side of the crotch portion,
The disposable diaper according to claim 5 , wherein the front end of the cuff elastic region is located between the waist elastic region and the transverse elastic member in the longitudinal direction. The abdominal portion includes a waist stretchable region that is stretchable in the lateral direction on both sides of the absorbent body in the lateral direction,
The disposable diaper according to any one of claims 1 to 6, wherein the front ends of the cuff elasticated regions are located laterally inward of the laterally inner ends of the waistline elasticated regions. The absorbent body includes an absorbent core, the absorbent core having a pair of side fold guide portions spaced apart in the laterally direction and extending in the longitudinal direction, and a central fold guide portion extending in the longitudinal direction between the pair of side fold guide portions,
The end portion of the central fold guide portion on the abdominal side is located outward in the vertical direction from the end portion of the side fold guide portion on the abdominal side,
The disposable diaper according to any one of claims 1 to 7, wherein the front end of the cuff stretchable region is located outward in the longitudinal direction from the end of the central fold guide portion on the abdominal side. The absorbent core has a high-rigidity region at an end in the longitudinal direction of the abdominal portion, in which neither the pair of side fold guide portions nor the central fold guide portion is present in the longitudinal direction,
The disposable diaper according to claim 8 , wherein, in a plan view, the front end of the cuff elastic region overlaps with the high stiffness region.

Images