Disposable diapers

Abstract

To provide a disposable diaper that has a good appearance.SOLUTION: A diaper 1 has a longitudinal direction X and a width direction Y orthogonal to the direction, a ventral area F, a crotch area M and a dorsal area R, an absorbent body 2 disposed in these areas, and a ventral exterior body 3F and a dorsal exterior body 3R disposed on the non-skin-facing side of the absorbent body 2. Both sides of the absorbent body 2 in the width direction are provided with a crotch-side elastic member 35 extending in the longitudinal direction. The diaper 1 has an adhesion area A where the absorbent body 2 and the exterior bodies 3F, 3R are bonded. Between one end and the other end of the adhesion area A, a middle adhesion area A1 is included where a length of the adhesion area in the width direction is shorter than a length of the adhesion area in the width direction at these ends. The end of the crotch-side elastic member 35 lies at a side part of the middle adhesion area A1 in the width direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a disposable diaper. [Background technology]

[0002] Disposable diapers generally comprise an absorbent body and a stretchable outer body arranged on the non-skin-facing side of the absorbent body, with both side edges of the outer body in the ventral portion and both side edges of the outer body in the dorsal portion being joined to form a waist opening and a pair of leg openings.

[0003] For the purpose of providing a good fit to the wearer, Patent Document 1, for example, discloses an absorbent article in which at least one of the ventral waist elastic member and the dorsal waist elastic member is cut widthwise between a pair of leg elastic members and a pair of leakproof wall elastic members, and contracts from the cut point to a position widthwise outside the leg elastic members and the leakproof wall elastic members.

[0004] Patent Document 2 discloses an absorbent article having an exterior member and end fixing parts that fix a pair of leakage preventing walls at the front and rear parts so that they cannot stand up. The document discloses that this absorbent article has a front joint part that joins the leakage preventing walls and the exterior member at the upper end of the front part, a rear joint part that joins the leakage preventing walls and the exterior member at the upper end of the rear part, and an intermediate joint part that joins the leakage preventing walls and the exterior member between the upper end and the lower end. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-202569 A [Patent Document 2] JP 2019-118555 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the absorbent articles described in Patent Documents 1 and 2, the contraction force of the elastic member arranged in the crotch portion may cause wrinkles or twists in the exterior body or absorbent body, which may impair the appearance of the diaper. In this respect, the absorbent articles described in Patent Documents 1 and 2 have room for improvement.

[0007] Therefore, an object of the present invention is to provide a disposable diaper with a good appearance. [Means for solving the problem]

[0008] The present invention provides a disposable diaper having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, the diaper comprising a ventral region and a dorsal region, and a crotch region located between the ventral region and the dorsal region, the diaper having an absorbent main body disposed in a region from the ventral region to the dorsal region along the longitudinal direction, and an outer body disposed on a non-skin-facing side of the absorbent main body, The absorbent body has at least one thread-like or band-like crotch side elastic member arranged in both side regions in the width direction so as to extend in the longitudinal direction, The diaper has an adhesive region in which the absorbent body and the exterior body are adhered to each other in at least one of the abdominal region and the back region, When the adhesive region is viewed in a plan view along a longitudinal direction of the diaper in an unfolded and maximum elongated state, an intermediate adhesive region is provided between a first virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to one end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, and a second virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to the other end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, the intermediate adhesive region having a widthwise length shorter than the length of the first virtual line segment and the length of the second virtual line segment; This disposable diaper is provided in such a way that, when viewed in a plane in the unfolded and maximum stretched state of the diaper, at least one end of the crotch side elastic member is located on both widthwise sides of the intermediate adhesive region and is in a non-adhesive region where the absorbent body and the outer body are not adhered, or is in a region toward the longitudinal inner end of the outer body relative to the non-adhesive region. Effect of the Invention

[0009] According to the present invention, a disposable diaper having a good appearance is provided. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a pants-type disposable diaper, which is one embodiment of the disposable diaper of the present invention, in its natural state. [Diagram 2] FIG. 2 is a developed plan view showing a schematic view of the skin-facing side (inner surface side) of the diaper shown in FIG. 1 in a developed and maximum stretched state. [Diagram 3] 3(a) to 3(c) are plan views each showing a schematic diagram of an embodiment of the adhesive region and the intermediate adhesive region. [Figure 4] FIG. 4 is a schematic cross-sectional view of the diaper shown in FIG. 2 taken along line II. [Diagram 5] FIG. 5 is a cross-sectional view that illustrates an embodiment of an absorbent sheet that constitutes an embodiment of an absorbent main body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The disposable diaper of the present invention will be described below based on its preferred embodiments. Figures 1 and 2 show an embodiment of a pants-type disposable diaper as a preferred embodiment of the absorbent article of the present invention. As shown in Figs. 1 and 2, a pants-type disposable diaper (hereinafter, simply referred to as "diaper") 1 as an absorbent article has a ventral region F arranged on the ventral side of a wearer when the diaper is worn, a dorsal region R arranged on the dorsal side, and a crotch region M located between the ventral region F and the dorsal region R. The diaper 1 has a longitudinal direction X extending from the ventral side of the wearer through the crotch region to the dorsal side corresponding to the front-rear direction of the wearer, and a width direction Y perpendicular thereto. The ventral region F, the crotch region M, and the dorsal region R extend continuously along the front-rear direction of the wearer. The crotch region M has an excretory part facing portion (not shown) that is arranged facing the excretory part of the wearer when the diaper 1 is worn.

[0012] In this specification, the "skin-facing side" refers to the side of the diaper or its constituent members (e.g., absorbent body) that faces the wearer's skin when the diaper is worn, and the "non-skin-facing side" refers to the side that faces the opposite side to the wearer's skin when the diaper is worn. In other words, the skin-facing side is the side that is relatively closer to the wearer's skin, and the non-skin-facing side is the side that is relatively farther from the wearer's skin. "When worn" refers to a state in which the diaper is maintained in a proper wearing position. "Unfolded and fully stretched state" refers to a state in which each elastic member described later is stretched to the design dimensions (dimensions when the diaper is spread out flat without any influence of the elastic members). In the following description, when the term "planar view of the diaper" is used, it means "planar view of the diaper in the unfolded and fully stretched state" unless otherwise specified.

[0013] 1 and 2, the diaper 1 comprises an absorbent body 2 capable of absorbing and retaining bodily waste, and an exterior body 3 arranged on the non-skin-facing side of the absorbent body 2. The exterior body 3 is a member that forms the outer shape of the diaper 1. The periphery of the exterior body 3 forms the contours of the ventral region F and the dorsal region R of the diaper 1, respectively.

[0014] The exterior body 3 in this embodiment includes a ventral exterior body 3F extending in the width direction Y and disposed so as to be located in the ventral region F, and a rear exterior body 3R that is separate from the ventral exterior body 3F and extends in the width direction Y and disposed so as to be located in the rear region R. In other words, the diaper 1 in this embodiment is a pants-type disposable diaper known as a split type. Alternatively, the exterior body 3 may be in a form that extends continuously from the ventral region F to the rear region R. The absorbent main body 2 is disposed so as to bridge both exterior bodies 3F, 3R disposed at a predetermined distance in the longitudinal direction X. Details of the absorbent main body 2 will be described later. In the following description, for convenience of explanation, an embodiment in which the exterior body 3 has a ventral exterior body 3F and a dorsal exterior body 3R will be described as an example.

[0015] The diaper 1 has a pair of side seals S, S formed by joining both sides in the width direction Y of the ventral exterior body 3F and both sides in the width direction Y of the rear exterior body 3R together. This connects the exterior bodies 3F, 3R in a ring shape. The diaper 1 also has a waist opening WH through which the wearer's torso passes, and a pair of leg openings LH through which the wearer's lower legs pass. The side seals S are formed by a joining method such as adhesive, heat sealing, ultrasonic sealing, etc.

[0016] As described above, the exterior body 3 has a ventral exterior body 3F and a dorsal exterior body 3R that is separate from the ventral exterior body 3F. As shown in FIG. 2, the ventral exterior body 3F includes a ventral outer layer sheet 31, a ventral inner layer sheet 32, and an exterior body elastic member 8 arranged between these sheets 31 and 32. Similarly, the dorsal exterior body 3R includes a dorsal outer layer sheet 33, a dorsal inner layer sheet 34, and an exterior body elastic member 8 arranged between these sheets 33 and 34. Each of the exterior bodies 3F and 3R includes a plurality of thread-like or strip-like exterior body elastic members 8 arranged in a stretched state so as to extend in the width direction Y. This allows each of the exterior bodies 3F and 3R to be stretchable in the width direction Y. Each exterior body elastic member 8 is arranged in the peripheral portion of the waist opening WH formed by both exterior bodies 3F and 3R, and the exterior body 3 is capable of exhibiting stretchability in the width direction Y.

[0017] 2, the absorbent main body 2 has a rectangular shape extending along the longitudinal direction X when viewed in a plan view. The absorbent main body 2 extends in the longitudinal direction X from the ventral region F to the dorsal region R. The absorbent main body 2 is joined to the central regions in the width direction Y of the ventral exterior body 3F and the dorsal exterior body 3R by a joining method such as an adhesive.

[0018] In addition, the absorbent main body 2 preferably has a pair of one or more thread-like or strip-like crotch-side elastic members 35 arranged in a stretched state so as to extend in the longitudinal direction X on both side regions in the width direction Y. This allows a substantially continuous annular leg gather LG to be formed around the entire periphery of each opening edge of the pair of leg openings LH, further improving the fit to the wearer. In this embodiment, a plurality of crotch-side elastic members 35 are provided, one end of each crotch-side elastic member 35 is located in the abdominal region F and the other end is located in the dorsal region R, and each crotch-side elastic member 35 is arranged continuously in the abdominal region F, the crotch region M, and the dorsal region R.

[0019] The absorbent body 2 typically comprises a liquid-permeable top sheet forming the skin-facing side of the diaper 1, a liquid-impermeable or poorly liquid-permeable leak-proof sheet forming the non-skin-facing side, and a liquid-retentive absorbent body. The absorbent body, like the absorbent body 2, has a shape that is elongated in the longitudinal direction X of the diaper 1 in a plan view, and is disposed between the top sheet and the leak-proof sheet. The top sheet and the leak-proof sheet cover the entire surface of the absorbent body, and are joined to each other by a known joining method such as an adhesive on the outer side of the side edges of the absorbent body along the longitudinal direction X.

[0020] The topsheet and the leakproof sheet may be joined, for example, in a state in which the topsheet crosses the skin-facing side of the absorbent in the width direction Y and the extensions of the topsheet from both side edges along the longitudinal direction X of the absorbent 5 are wrapped around the non-skin-facing side of the absorbent, and the extensions are joined to the leakproof sheet. In this case, the topsheet does not cover the central region in the width direction Y of the non-skin-facing side of the absorbent, and this is covered by the leakproof sheet.

[0021] The absorbent body typically comprises an absorbent core and a core wrap sheet covering the absorbent core. The absorbent core comprises at least one of a stack of absorbent natural fibers such as pulp fibers, a mixed stack containing absorbent natural fibers and absorbent polymers, and / or an absorbent sheet comprising two identical or different fiber sheets and particles of absorbent polymers disposed between the fiber sheets. When the absorbent core comprises both a stack and an absorbent sheet, the sizes of the stack and absorbent sheet in plan view may be the same or different. The core wrap sheet is made of tissue paper or a water-permeable nonwoven fabric. The core wrap sheet preferably covers the entire skin-facing side and non-skin-facing side of the absorbent core.

[0022] A pair of leakage preventing cuffs 24, 24 made of a liquid resistant or water repellent and breathable sheet is provided on both sides along the longitudinal direction X of the skin-facing surface of the absorbent body 2. Near the free end of each leakage preventing cuff 24, one or more thread-like leakage preventing cuff-forming elastic members 25 are arranged in a stretched state along the longitudinal direction X, with the thread-like leakage preventing cuff-forming elastic members 25 being inwardly disposed in a leakage preventing cuff-forming sheet 26. The leakage preventing cuffs 24 stand up at least in the crotch region M as the leakage preventing cuff-forming elastic members 25 arranged in a stretched state contract when the diaper 1 is worn, thereby preventing the outflow of excrement such as urine outward in the width direction Y.

[0023] The top sheet and the leakproof sheet may be any sheet that has been conventionally used in disposable diapers, without any particular restrictions. For example, the top sheet may be any of various nonwoven fabrics or perforated films. The leakproof sheet may be a resin film or a laminate of a resin film and a nonwoven fabric. The core wrap sheet may be the same as the top sheet. The sheet for forming the leakproof cuff may be the same as the leakproof sheet.

[0024] Returning to the explanation of the exterior body 3, the rear exterior body 3R has a rear extension portion 3E that extends inward in the longitudinal direction X from an imaginary line connecting the inner ends of the side seal portions S in the longitudinal direction X. The rear extension portion 3E is curved so that the length of its periphery in the width direction Y gradually becomes shorter toward the inside in the longitudinal direction.

[0025] The back-side extension 3E has a pair of thread-like or band-like leg elastic members 40 arranged on both sides in the width direction Y. One or more leg elastic members 40 are arranged on each side in the width direction Y. The leg elastic members 40 are arranged in a stretched state, curved along the outer periphery of the back-side extension 3E in a plan view, so as to fit around the legs of the wearer when the diaper is worn. This allows at least a part of the back-side extension 3E to be positioned along the legs of the wearer, improving the fit to the wearer.

[0026] The leg elastic members 40 have one end region (outer end region) including an outer end 40a in the width direction Y, which is one end of the leg elastic members 40, located at or near the formation position of the side seal portion S and fixed thereto. Meanwhile, the other end region (inner end region) including an inner end 40b in the width direction Y, which is the other end of the leg elastic members 40, is arranged and fixed inward in the width direction Y from both side edges in the width direction Y of the absorbent main body 2. The other end region including the inner end 40b of each leg elastic member 40 is arranged so that a part or the whole area overlaps with the absorbent main body 2 in a plan view. In the present embodiment, the inner ends 40b of each leg elastic member 40 do not reach the center region in the width direction of the absorbent main body 2 in a plan view, but are located in both side regions in the width direction Y, and are therefore arranged so as to overlap with the absorbent main body 2 in a plan view.

[0027] The length over which the other end region (inner end region) including the inner end 40b of the leg elastic member 40 overlaps with the absorbent body 2 is preferably 20 mm or more, more preferably 25 mm or more, even more preferably 30 mm or more, and is preferably 60 mm or less, more preferably 55 mm or less, even more preferably 50 mm or less.

[0028] In this embodiment, the crotch side elastic members 35 and the leg elastic members 40 are arranged so that at least one of the crotch side elastic members 35 and at least one of the leg elastic members 40 cross each other in a plan view of the diaper 1, as shown in Fig. 1 and Fig. 2. With this configuration, the diaper fits the entire legs of the wearer when worn, further improving the fit to the wearer. In the embodiment shown in Fig. 2, the multiple crotch side elastic members 35 and the multiple leg elastic members 40 are all arranged so as to cross each other.

[0029] Regarding the bonding form of the absorbent main body 2 and the exterior body 3, the diaper 1 preferably has an adhesive region A where the absorbent main body 2 and the exterior body 3 are bonded to each other as shown in Fig. 2. In detail, it is preferable that the adhesive region A includes both a ventral adhesive region Af where one end region in the longitudinal direction X of the absorbent main body 2 is bonded to a ventral exterior body 3F, and a rear adhesive region Ar where the other end region in the longitudinal direction X of the absorbent main body 2 is bonded to a rear exterior body 3R. That is, the adhesive region A in this embodiment is formed in each of both end regions in the longitudinal direction X of the absorbent main body 2, and is not formed in a central region in the longitudinal direction X of the absorbent main body 2.

[0030] Regarding the adhesive region A, when the adhesive region A is viewed in a plan view along the longitudinal direction X of the diaper 1, a first imaginary line segment is considered to connect both outer widthwise ends of the adhesive region A at a position closest to one end of the adhesive region A in the longitudinal direction X and to have a maximum length along the width direction Y. Similarly, a second imaginary line segment is considered to connect both outer widthwise ends of the adhesive region A at a position closest to the other end of the adhesive region A in the longitudinal direction X and to have a maximum length along the width direction Y. In this case, it is preferable to have an intermediate adhesive region A1 between the first and second imaginary line segments, the length of which in the width direction Y of the adhesive region A is shorter than the length of the first imaginary line segment and the length of the second imaginary line segment when viewed along the longitudinal direction X.

[0031] More specifically, as shown in Fig. 2, when the adhesive region A is viewed in the longitudinal direction X of the diaper 1 in a plan view of the diaper, it is preferable to have an intermediate adhesive region A1 between a longitudinal inner end Am, which is one end of the adhesive region A in the longitudinal direction X, and a longitudinal outer end An, which is the other end of the adhesive region A in the longitudinal direction X. In the embodiment shown in Fig. 2, the side along the width direction of the longitudinal inner end Am corresponds to the first imaginary line segment, and the side along the width direction of the longitudinal outer end An corresponds to the second imaginary line segment. In the embodiment shown in the figure, the adhesive region A is formed continuously in a symmetrical planar shape, but if, for example, the adhesive region A is formed discontinuously or in an asymmetrical planar shape, the first virtual line segment and the second virtual line segment are considered based on the position of the outermost end in the width direction where the adhesive region A is formed.

[0032] The intermediate adhesive region A1 is an area whose length in the width direction Y is shorter than the length in the width direction Y of the adhesive region A at the longitudinal inner end Am and the length in the width direction Y of the adhesive region A at the longitudinal outer end An. The intermediate adhesive region A1 is preferably formed in at least one of the ventral adhesive region Af and the rear adhesive region Ar, and more preferably formed only in the rear adhesive region Ar as shown in FIG. 2. By forming the intermediate adhesive region A1, it is possible to form a portion where the absorbent main body 2 and the exterior body 3 are not joined while sufficiently maintaining the joining state between the absorbent main body 2 and the exterior body 3, so that it is possible to reduce the stress generated by the contraction of the elastic member from being excessively applied to the exterior body 3 and the absorbent main body 2 bonded to the exterior body. As a result, it is possible to reduce the occurrence of unintended wrinkles and twists in the exterior body 3, the absorbent main body 2, and the absorbent core, and to further improve the appearance of the diaper.

[0033] In particular, as shown in Figure 2, the ventral adhesive region Af does not have an intermediate adhesive region A1, while the dorsal adhesive region Ar has an intermediate adhesive region A1. This has the advantage that the adhesive area can be increased on the ventral side, which is more susceptible to the wearer's movements, thereby allowing the diaper to fully exhibit its formability and strength, while maintaining a better appearance on the dorsal side, which is more susceptible to the wearer's movements.

[0034] In this embodiment, as shown in Fig. 2, in a plan view of the diaper, the intermediate adhesive region A1 is formed in the back adhesive region Ar. The back adhesive region Ar in this embodiment has an inner adhesive region A2, which is an adhesive region including a longitudinal inner end Am and located on the longitudinal inner end side of the intermediate adhesive region A1, an outer adhesive region A3, which is an adhesive region including a longitudinal outer end An and located on the longitudinal outer end side of the intermediate adhesive region A1, and an intermediate adhesive region A1 disposed between the inner adhesive region A2 and the outer adhesive region A3. In this embodiment, the intermediate adhesive region A1, the inner adhesive region A2, and the outer adhesive region A3 are formed one by one, and each region is disposed in a connected manner.

[0035] In the embodiment shown in Fig. 2, in a plan view of the diaper, the inner adhesive region A2 and the outer adhesive region A3 each have a rectangular shape with the direction in which their long sides extend generally coinciding with the width direction Y of the diaper. The lengths in the width direction Y of the inner adhesive region A2 and the outer adhesive region A3 both generally coincide with the length in the width direction Y of the absorbent main body 2. The intermediate adhesive region A1 has a rectangular shape with a length in the width direction Y that is shorter than those of the inner adhesive region A2 and the outer adhesive region A3. As a result, non-adhesive regions A5, where the absorbent main body 2 and the exterior body 3 are not adhered to each other, are formed on both sides of the intermediate adhesive region A1 in the width direction Y.

[0036] For convenience of explanation, as shown in Fig. 2, the embodiment has been described in which the length in the width direction Y of the longitudinal inner end Am of the adhesive region A and the length in the width direction Y of the longitudinal outer end An of the adhesive region A are the same, but the embodiment is not limited to this, and for example, the lengths in the width direction Y of each end may be different from each other. Furthermore, the adhesive region A may be formed in a geometric shape other than a rectangle in a plan view, such as an ellipse or a rectangle with chamfered corners. When the lengths in the width direction Y of each end are formed to be different, the intermediate adhesive region A1 is defined as all areas whose length in the width direction Y is shorter than the length in the width direction Y of the end with the shorter length in the width direction Y, among the length in the width direction Y of the longitudinal inner end Am of the adhesive region A and the length in the width direction Y of the longitudinal outer end An of the adhesive region A, based on the end with the shorter length in the width direction Y.

[0037] In addition, with regard to the positions of the intermediate adhesive region A1 and the crotch-side elastic members 35, it is preferable that an end of at least one crotch-side elastic member 35 is located in the non-adhesive region A5 or in a region closer to the longitudinal inward end of the exterior body 3 than the non-adhesive region A5 in a plan view of the diaper, as shown in Fig. 2. In the embodiment shown in Fig. 2, one end of each of the crotch-side elastic members 35 is located in the non-adhesive region A5. With this configuration, unintended wrinkles occurring in the exterior body 3 due to the contraction stress of the elastic members can be reduced, further improving the appearance of the diaper.

[0038] From the viewpoint of suppressing wrinkle formation and improving fit, the overlap length of the crotch-side elastic member 35 with the non-adhesive region A5 is preferably 150 mm or less, more preferably 130 mm or less, even more preferably 100 mm or less, still more preferably 50 mm or less, still more preferably 30 mm or less, and preferably 0 mm or more. When multiple intermediate adhesive regions A1 are formed at one end of the absorbent main body 2 and there are multiple non-adhesive regions A5, it is preferable that the total overlap length of those regions is in the above range.

[0039] The adhesive region A including the intermediate adhesive region A1 shown in Figure 2 has been described as being I-shaped in a planar view, but instead, the adhesive region A including the intermediate adhesive region A1 may be formed to have, for example, a planar shape as shown in Figures 3(a) to (c).

[0040] The adhesive region A shown in FIG. 3(a) is formed so that, when considering the longitudinal direction X central portion of the adhesive region A, which is a position that divides the longitudinal inner end portion Am and the longitudinal outer end portion An in half, the length in the width direction Y gradually decreases from the longitudinal inner end portion Am toward the longitudinal direction X central portion of the adhesive region A, and the length in the width direction Y gradually increases from the longitudinal direction X central portion toward the longitudinal outer end portion An, so that the width direction edge of the longitudinal direction X central portion of the adhesive region A has a shape that is constricted inward. The adhesive region A shown in the same figure has one intermediate adhesive region A1 formed. The adhesive region A shown in the same figure is formed so that the length in the width direction Y of the longitudinal inner end portion Am of the adhesive region A and the length in the width direction Y of the longitudinal outer end portion An of the adhesive region A are mutually equal, but as described above, the width direction lengths of each end portion may be formed to be different.

[0041] The adhesive region A shown in FIG. 3(b) is formed so that the length in the width direction Y gradually decreases from the longitudinal inner end Am to the longitudinal outer end An, then the length in the width direction Y becomes the same, and then the length in the width direction Y gradually increases, so that the central region in the longitudinal direction X of the adhesive region A has a shape that is constricted inward in the width direction Y. The adhesive region A shown in the figure has one intermediate adhesive region A1 formed. The adhesive region A shown in the figure is formed so that the length in the width direction Y of the longitudinal inner end Am of the adhesive region A and the length in the width direction Y of the longitudinal outer end An of the adhesive region A are mutually the same, but as described above, the width direction lengths of the respective ends may be formed to be different.

[0042] In the adhesive region A shown in FIG. 3(c), a portion in which the length in the width direction Y is shorter than the length in the width direction Y of the longitudinal inner end Am and the longitudinal outer end An, and a portion in which the length in the width direction Y is the same as the length in the width direction Y of the longitudinal inner end Am and the longitudinal outer end An are alternately arranged along the longitudinal direction X, so that the width direction edge of the adhesive region A is formed in a zigzag shape. The adhesive region A shown in the figure has a plurality of intermediate adhesive regions A1 formed therein. The adhesive region A shown in the figure is formed so that the length in the width direction Y of the longitudinal inner end Am of the adhesive region A and the length in the width direction Y of the longitudinal outer end An of the adhesive region A are the same, but as described above, the width direction lengths of the respective ends may be different.

[0043] Regarding the relationship of the lengths in the longitudinal direction X of the intermediate adhesive region A1, the inner adhesive region A2, and the outer adhesive region A3, it is preferable that the adhesive regions A are formed so that the order of the lengths T2 < T3 < T1 is the order of the length T1 of the intermediate adhesive region A1, the length T2 of the inner adhesive region A2, and the length T3 of the outer adhesive region A3, as shown in Fig. 2. In other words, it is preferable that the length T2 is the shortest, the length T1 is the longest, and the length T3 is an intermediate length between the lengths T1 and T2. This configuration effectively prevents unintended wrinkles from forming in the absorbent main body 2 and the exterior body 3, further improving the appearance of the diaper. In particular, by forming the adhesive region A so that length T2<length T3<length T1, unintended wrinkles from forming in the exterior body 3 can be effectively prevented, which is advantageous in that it allows the liquid absorbency of the absorbent main body 2 to be fully exhibited while still achieving a further improvement in the appearance of the diaper due to the improved appearance of the exterior body 3.

[0044] Instead of the above-mentioned configuration, it is also preferable that the adhesive region A is formed so that the lengths are in the order of length T3<length T2<length T1. Even with such a configuration, it is possible to effectively prevent unintended wrinkles from being formed in the absorbent main body 2 and the exterior body 3, and the appearance of the diaper is further improved. In particular, by forming the adhesive region A so that the length T3<length T2<length T1, it is possible to effectively prevent unintended wrinkles from being formed in the absorbent main body 2 and the associated unintended wrinkles from occurring in the exterior body 3, which is advantageous in that it is possible to improve the fit around the abdomen of the wearer while further improving the appearance of the diaper.

[0045] The length T1 is preferably 100 mm or more, more preferably 110 mm or more, and is preferably 150 mm or less, more preferably 130 mm or less. The length T2 is preferably 10 mm or more, more preferably 20 mm or more, and is preferably 50 mm or less, more preferably 30 mm or less. The length T3 is preferably 10 mm or more, more preferably 20 mm or more, and is preferably 50 mm or less, more preferably 40 mm or less.

[0046] Regarding the relationship between the widthwise lengths of the intermediate adhesive region A1, the inner adhesive region A2 and the outer adhesive region A3, when considering the widthwise length W1 of the intermediate adhesive region A1, the widthwise length W2 of the inner adhesive region A2 and the widthwise length W3 of the outer adhesive region A3, it is preferable that the adhesive region A is formed so that the lengths increase in the order of length W1 < length W2 = length W3, or so that the lengths increase in the order of length W1 < length W2 < length W3 or length W1 < length W3 < length W2. That is, it is preferable that the length W1 is the shortest, and the length W2 and the length W3 are the same. Alternatively, it is preferable that the length W1 is the shortest, the length W3 is the longest, and the length W2 is an intermediate length between the lengths W1 and W3. Also, it is preferable that the length W1 is the shortest, the length W2 is the longest, and the length W3 is an intermediate length between the lengths W1 and W2. In particular, from the viewpoint of improving production efficiency, it is more preferable to make the widthwise lengths of the inner adhesive region A2 and the outer adhesive region A3 the same and to make the widthwise length of the intermediate adhesive region A1 shorter than the widthwise lengths of the inner adhesive region A2 and the outer adhesive region A3, that is, to have the relationship length W1 < length W2 = length W3.

[0047] The length W1 is preferably 100 mm or more, more preferably 130 mm or more, and is preferably 150 mm or less, more preferably 140 mm or less. The length W2 is preferably 151 mm or more, more preferably 160 mm or more, and is preferably 180 mm or less, more preferably 170 mm or less. The length W3 is preferably 151 mm or more, more preferably 160 mm or more, and is preferably 180 mm or less, more preferably 170 mm or less.

[0048] Regarding the relationship between the exterior body elastic member 8 and the adhesive region A, it is preferable that the exterior body elastic member 8 is disposed so as to at least partially overlap the intermediate adhesive region A1 in a plan view of the diaper, as shown in Fig. 2. With this configuration, when the diaper is worn, unintended twisting of the absorbent main body is prevented and the absorbent main body spreads to adequately cover the excretory parts including the buttocks and the vicinity thereof, so that the liquid absorbency of the absorbent main body 2 can be fully exhibited and the appearance of the diaper is further improved.

[0049] Regarding the relationship between the leg elastic members 40 and the adhesive region A, it is preferable that the inner end 40b of the leg elastic members 40 is arranged so as to at least partially overlap the inner adhesive region A2 in a plan view of the diaper, as shown in Fig. 2. With this configuration, when the diaper is worn, unintended twisting of the absorbent main body is prevented and the absorbent main body spreads to adequately cover the excretory parts including the buttocks and the vicinity thereof, so that the liquid absorbency of the absorbent main body 2 can be fully exhibited and the appearance of the diaper is further improved.

[0050] The length by which the other end region (inner end region) including the inner end 40b of the leg elastic member 40 overlaps with the inner adhesive region A2 is preferably 20 mm or more, more preferably 25 mm or more, even more preferably 30 mm or more, and is preferably 60 mm or less, more preferably 55 mm or less, even more preferably 50 mm or less.

[0051] The absorbent main body 2 will be described in detail with reference to Fig. 2, Fig. 4 and Fig. 5. As shown in Fig. 2 and Fig. 4, the absorbent main body 2 preferably includes an absorbent sheet 2A. In this embodiment, the absorbent sheet 2A has a rectangular shape extending along the longitudinal direction X in a plan view of the diaper, and both ends in the longitudinal direction X extend to the exterior body 3. In addition, both ends in the width direction Y of the absorbent sheet 2A are located widthwise inward of the positions of the crotch-side elastic members 35.

[0052] As shown in FIG. 5, the absorbent sheet 2A includes a first fiber sheet 2a, a second fiber sheet 2b, and particles of a water-absorbing polymer 2c arranged between the two fiber sheets 2a and 2b. The two fiber sheets 2a and 2b may be the same or different. A plurality of particles of the water-absorbing polymer 2c shown in the figure are arranged in the sheet surface direction. No other members are present on the outer surfaces of the first fiber sheet 2a and the second fiber sheet 2b shown in the figure, but as described later, other members such as auxiliary layers may be arranged on the outer surfaces of the fiber sheets 2a and 2b. When the absorbent sheet 2A is incorporated into an absorbent article such as a diaper, the first fiber sheet 2a may be arranged on the skin-facing side and the second fiber sheet 2b may be arranged on the non-skin-facing side, or the second fiber sheet 2b may be arranged on the skin-facing side and the first fiber sheet 2a may be arranged on the non-skin-facing side. The two fibrous sheets 2a, 2b are bonded together (not shown) using a bonding method commonly used in this technical field, such as adhesives or embossing, thereby holding the particles of the water-absorbing polymer 2c between the two fibrous sheets 2a, 2b.

[0053] Regarding the positioning of the leg elastic members 40 and the absorbent sheet 2A in a plan view, it is preferable that, in a plan view of the diaper, the leg elastic members 40 intersect with both side portions in the width direction Y of the absorbent sheet 2A. In this embodiment, at least one of the leg elastic members 40 located on one side in the width direction Y intersects with one side portion in the width direction Y of the absorbent sheet 2A, and at least one of the leg elastic members 40 located on the other side in the width direction Y intersects with the other side portion in the width direction Y of the absorbent sheet 2A.

[0054] When the absorbent main body 2 includes an absorbent sheet 2A, it is preferable that the absorbent main body 2 further includes an auxiliary layer 2B as shown in Fig. 2 and Fig. 4. The absorbent sheet 2A and the auxiliary layer 2B each constitute a part of the absorbent body in the absorbent main body 2. It is also preferable that the auxiliary layer 2B is disposed adjacent to the skin-facing surface of the absorbent sheet 2A. It is also preferable that the auxiliary layer 2B is a mixed stack containing at least water-absorbent natural fibers and water-absorbent polymer particles. In this embodiment, the auxiliary layer 2B has a shape smaller than the area of ​​the absorbent sheet 2A in a plan view of the diaper.

[0055] In the embodiment shown in Fig. 4, the absorbent sheet 2A and the auxiliary layer 2B are laminated and covered with the top sheet 21 and the leakproof sheet 22. From the viewpoint of making it easier to stand the absorbent body towards the wearer and reducing leakage of body waste, it is preferable that a pair of side elastic members 29 are arranged on both side edges along the longitudinal direction X of the absorbent body. Each side elastic member 29 is arranged in a stretched state between the top sheet 21 and the absorbent sheet 2A. One or more side elastic members 29 are arranged at least in the crotch region M. As shown in the figure, the crotch side elastic members 35 are contained in a stretched state in the non-skin side sheet 36. The non-skin side sheet 36 is joined to the absorbent main body 2 and / or the exterior body 3 by an adhesive or the like.

[0056] The length in the width direction Y of the longitudinal end region of the auxiliary layer 2B located on the ventral exterior body 3F is preferably longer than the length in the width direction Y of the longitudinal end region of the auxiliary layer 2B located on the dorsal exterior body 3R. As shown in FIG. 2, the longitudinal end region of the auxiliary layer 2B located on the ventral exterior body 3F is a region in which the length in the width direction Y increases continuously or stepwise from the dorsal exterior body 3R to the ventral exterior body 3F. This configuration increases the absorption area of ​​excreted liquid such as urine, and the auxiliary layer easily deforms around the wearer's legs when the diaper is worn. As a result, the fit of the diaper is improved when worn, and the wearer can easily move his / her legs.

[0057] As shown in Fig. 2, in a plan view of the diaper, the end in the longitudinal direction X of the auxiliary layer 2B located on the ventral region F side is preferably arranged so as to be positioned outward in the longitudinal direction X from the longitudinal inner end of the ventral exterior body 3F. Similarly, the end in the longitudinal direction X of the auxiliary layer 2B located on the dorsal region R side is also preferably arranged so as to be positioned outward in the longitudinal direction X from the longitudinal inner end of the dorsal extension 3E. This configuration can improve the ability to follow the movement of the wearer and can reduce the occurrence of unintended wrinkles and twists in the absorbent main body 2 and the exterior body 3. In particular, the length in the width direction Y of the longitudinal end region of the auxiliary layer 2B located on the ventral exterior body 3F is longer than the length in the width direction Y of the longitudinal end region of the auxiliary layer 2B located on the dorsal exterior body 3R, and the longitudinal end X of the auxiliary layer 2B located on the ventral region F is arranged to be positioned outward in the longitudinal direction X than the longitudinal inner end of the ventral exterior body 3F, so that the rigidity of the auxiliary layer can reduce the occurrence of unintended wrinkles and twists in the absorbent main body 2 and the exterior body 3 in the abdominal area where the wearer moves relatively greatly. As a result, the diaper has a good appearance and the liquid absorbency of the absorbent main body 2 can be fully exhibited.

[0058] In terms of the positional relationship between the adhesive region A and the auxiliary layer 2B, it is preferable that, in a plan view of the diaper 1, the longitudinal X end region of the auxiliary layer 2B located on the back region R side at least partially overlaps with the inner adhesive region A2 in at least one of the ventral adhesive region Af and the back adhesive region Ar. More specifically, it is more preferable that the longitudinal X end of the auxiliary layer 2B located on the back region R side of the diaper is arranged to be located longitudinally outward of the longitudinal inner end Am of the adhesive region A. This configuration can provide rigidity to the absorbent body 2, and as a result, even when a contraction stress of the elastic member is applied, the occurrence of unintended wrinkles and twisting can be effectively reduced.

[0059] In relation to the position of the auxiliary layer 2B and the position of the crotch-side elastic member 35, it is preferable that, in a plan view of the diaper 1, the longitudinal end of the auxiliary layer 2B is located beyond the end of the crotch-side elastic member 35 and outward in the longitudinal direction in at least one of the abdominal region F and the back region R. In the embodiment shown in FIG. 2, in the abdominal region F, the longitudinal end of the auxiliary layer 2B is located outward in the longitudinal direction X from one end of each crotch-side elastic member 35 located on the abdominal region F side. With this configuration, the rigid absorbent body 2 can prevent twisting of the exterior body that may occur due to contraction of the crotch-side elastic member 35. This is advantageous in that it can effectively reduce the occurrence of unintended wrinkles and twisting of the absorbent body 2 and the exterior body 3 in the abdominal region where the wearer moves relatively greatly.

[0060] Inelastic fiber sheets such as nonwoven fabrics can be used independently as the sheet materials constituting the ventral outer layer sheet 31, the ventral inner layer sheet 32, the dorsal outer layer sheet 33, and the dorsal inner layer sheet 34. The nonwoven fabrics used independently for the ventral outer layer sheet 31, the ventral inner layer sheet 32, the dorsal outer layer sheet 33, and the dorsal inner layer sheet 34 can be nonwoven fabrics used in the present technical field, such as spunbond nonwoven fabrics, thermal bond nonwoven fabrics, spunlace nonwoven fabrics, meltblown nonwoven fabrics, and air-through nonwoven fabrics.

[0061] Constituent resins of the elastic members 8, 25, 29, 35, 40 may be, independently of one another, elastic resins such as natural rubber, EVA rubber, synthetic rubber such as styrene-butadiene rubber, butadiene rubber, isoprene rubber, and neoprene rubber, polyurethane, and thermoplastic elastomers. Examples of thermoplastic elastomers include styrene-based elastomers such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene), ethylene-based elastomers, propylene-based elastomers, olefin-based elastomers such as α-olefin elastomers and copolymers of ethylene, butene, and octene, polyester-based elastomers, and polyurethane-based elastomers. These constituent resins may be used alone or in combination of two or more.

[0062] In a disposable diaper having the above configuration, preferably a pants-type disposable diaper, one end of the crotch-side elastic member 35 is located in the non-adhesive regions A5 located on both widthwise sides of the intermediate adhesive region A1 formed in the adhesive region A, or inward in the longitudinal direction from the non-adhesive regions A5, so that stress caused by contraction of the crotch-side elastic member 35 is unlikely to be applied to the absorbent main body 2 and the exterior body 3 located at the end of the crotch-side elastic member 35, thereby preventing unintended wrinkles and twists from being formed in the absorbent main body 2 and the exterior body 3 when the diaper is worn. As a result, the appearance of the diaper when worn is improved, and the usability is improved, while sufficient adhesion to the wearer due to contraction of the elastic member is maintained.

[0063] Although the present invention has been described based on the preferred embodiments, the present invention is not limited to the above-described embodiments.

[0064] In relation to the above-mentioned embodiment of the present invention, the following disposable diaper is further disclosed. <1> A disposable diaper having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, the disposable diaper comprising a ventral region and a dorsal region, and a crotch region located between the ventral region and the dorsal region, the disposable diaper having an absorbent main body disposed in a region from the ventral region to the dorsal region along the longitudinal direction, and an outer body disposed on a non-skin-facing side of the absorbent main body, The absorbent body has at least one thread-like or band-like crotch side elastic member arranged in both side regions in the width direction so as to extend in the longitudinal direction, The diaper has an adhesive region in which the absorbent body and the exterior body are adhered to each other in at least one of the abdominal region and the back region, When the adhesive region is viewed in a plan view along a longitudinal direction of the diaper in an unfolded and maximum elongated state, an intermediate adhesive region is provided between a first virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to one end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, and a second virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to the other end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, the intermediate adhesive region having a widthwise length shorter than the length of the first virtual line segment and the length of the second virtual line segment; A disposable diaper, wherein, when viewed in a plane in the unfolded and maximum stretched state of the diaper, at least one end of the crotch side elastic member is located on both widthwise sides of the intermediate adhesive region and is in a non-adhesive region where the absorbent body and the outer body are not adhered, or is in a region toward the longitudinal inward end of the outer body relative to the non-adhesive region.

[0065] <2> A plurality of the crotch side elastic members are provided, Each of the crotch side elastic members has one end located in the abdominal region and the other end located in the dorsal region, The crotch side elastic members are disposed continuously in the abdominal region, the crotch region and the back region. <1> 13. The disposable diaper according to claim 12. <3> The adhesive regions are formed in both end regions in the longitudinal direction of the absorbent body, and are not formed in a central region in the longitudinal direction of the absorbent body. <1> or <2> 13. The disposable diaper according to claim 12. <4> The intermediate adhesive region is formed only in the back region. <1> ~ <3> 13. The disposable diaper according to claim 12 . <5> The exterior body has a plurality of exterior body elastic members extending along a width direction, In a plan view of the diaper in an unfolded and maximum stretched state, the non-adhesive region and the position of the elastic member of the outer body overlap each other. <1> ~ <4> 13. The disposable diaper according to claim 12 .

[0066] <6> The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, The longitudinal length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region, and the outer adhesive region, the intermediate adhesive region is the longest, and the outer adhesive region is an intermediate length between the inner adhesive region, the intermediate adhesive region, and the outer adhesive region. <1> ~ <5> 13. The disposable diaper according to claim 12 . <7> The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction is defined as the outer adhesive region, The longitudinal length of each adhesive region is shorter than that of the intermediate adhesive region among the inner adhesive region, the intermediate adhesive region, and the outer adhesive region, the outer adhesive region is the shortest, the intermediate adhesive region is the longest, and the inner adhesive region is an intermediate length between the two regions. <1> ~ <5> 13. The disposable diaper according to claim 12 .

[0067] <8> The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, The width direction length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region, and the outer adhesive region, and the inner adhesive region and the outer adhesive region are the same length. <1> ~ <7> 13. The disposable diaper according to claim 12 . <9> The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, The width direction length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region, and the outer adhesive region, the inner adhesive region is the longest, and the outer adhesive region is an intermediate length between the inner adhesive region, the intermediate adhesive region, and the outer adhesive region. <1> ~ <7> 13. The disposable diaper according to claim 12 . <10> The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, The width direction length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region, and the outer adhesive region, the intermediate adhesive region is the longest, and the inner adhesive region is an intermediate length between the inner adhesive region and the outer adhesive region. <1> ~ <7> 13. The disposable diaper according to claim 12 .

[0068] <11> The length T2 in the longitudinal direction of the inner adhesive region is preferably 10 mm or more, more preferably 20 mm or more, The length T2 is preferably 50 mm or less, more preferably 30 mm or less. <6> ~ <10> 13. The disposable diaper according to claim 12 . <12> The width W2 of the inner adhesive region is preferably 151 mm or more, more preferably 160 mm or more. The length W2 is preferably 180 mm or less, more preferably 170 mm or less. <6> ~ <11> 13. The disposable diaper according to claim 12 . <13> The length T3 of the outer adhesive region in the longitudinal direction is preferably 10 mm or more, more preferably 20 mm or more, The length T3 is preferably 50 mm or less, more preferably 40 mm or less. <6> ~ <12> 13. The disposable diaper according to claim 12 . <14> The width W3 of the outer adhesive region is preferably 151 mm or more, more preferably 160 mm or more. The length W3 is preferably 180 mm or less, more preferably 170 mm or less. <6> ~ <13> 13. The disposable diaper according to claim 12 .

[0069] <15> The length T1 in the longitudinal direction of the intermediate adhesive region is preferably 100 mm or more, more preferably 110 mm or more, The length T1 is preferably 150 mm or less, more preferably 130 mm or less. <1> ~ <14> 13. The disposable diaper according to claim 12 . <16> The width W1 of the intermediate adhesive region is preferably 100 mm or more, more preferably 130 mm or more. The length W1 is preferably 150 mm or less, more preferably 140 mm or less. <1> ~ <15> 13. The disposable diaper according to claim 12 . <17> The exterior body has a plurality of exterior body elastic members extending along a width direction, In a plan view of the diaper, the outer body elastic member is disposed so as to overlap with the intermediate adhesive region. <1> ~ <16> 13. The disposable diaper according to claim 12 .

[0070] <18> The diaper has a pair of side seal portions in which both side portions of the exterior body located in the abdominal region and the exterior body located in the dorsal region are joined to each other, The exterior body located in the rear region includes a rear extension portion that extends inward in the longitudinal direction beyond an imaginary line connecting inner end edges of the side seal portions in the longitudinal direction. <1> ~ <17> 13. The disposable diaper according to claim 12 . <19> The back-side extension portion has leg-around elastic members arranged to fit around the legs of a wearer when the diaper is worn. <18> 13. The disposable diaper according to claim 12. <20> The intermediate adhesive region is disposed in the back region. When the adhesive region located on the inner end side in the longitudinal direction in a plan view of the diaper in an unfolded and maximum stretched state is defined as an inner adhesive region, The inner ends of the leg elastic members in the width direction are arranged so as to overlap with the inner adhesive regions. <18> or <19> 13. The disposable diaper according to claim 12.

[0071] <21> one end region of the leg elastic member is located at or near the side seal portion, and the other end region of the leg elastic member overlaps with the absorbent main body in a plan view; In a plan view of the diaper in an unfolded and maximum stretched state, the other end region of the leg elastic member overlaps with an inner adhesive region, which is an adhesive region located on an inner end side in the longitudinal direction relative to the intermediate adhesive region. <18> ~ <20> 13. The disposable diaper according to claim 12 . <22> The length of the other end region of the leg elastic member overlapping with the absorbent body is preferably 20 mm or more, more preferably 25 mm or more, even more preferably 30 mm or more, and is preferably 60 mm or less, more preferably 55 mm or less, even more preferably 50 mm or less. <21> 13. The disposable diaper according to claim 12. <23> The length of the other end region of the leg elastic member overlapping the inner adhesive region is preferably 20 mm or more, more preferably 25 mm or more, even more preferably 30 mm or more, and is preferably 60 mm or less, more preferably 55 mm or less, even more preferably 50 mm or less. <21> or <22> 13. The disposable diaper according to claim 12. <24> The absorbent body has an absorbent sheet having two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets. <1> ~ <23> 13. The disposable diaper according to claim 12 . <25> The absorbent sheet has a rectangular shape extending along the longitudinal direction in a plan view of the diaper, and extends so that both ends in the longitudinal direction are located in the exterior body located in the abdominal region and the exterior body located in the dorsal region, respectively. <24> 13. The disposable diaper according to claim 12. <26> Both widthwise ends of the absorbent sheet are located inward in the widthwise direction from the positions of the crotch side elastic members. <24> or <25> 13. The disposable diaper according to claim 12.

[0072] <27> The absorbent body further includes an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet, The auxiliary layer is a mixed stack containing at least a water-absorbent natural fiber and a water-absorbent polymer, The longitudinal end of the auxiliary layer overlaps with an inner adhesive region, which is an adhesive region located on the longitudinal inner end side of at least one of the ventral region and the dorsal region, in a plan view. <24> ~ <26> 13. The disposable diaper according to claim 12 . <28> When the diaper is in a fully extended and unfolded state, a longitudinal end of the auxiliary layer located on the abdominal region side is located longitudinally outward of a longitudinal inner end of the abdominal outer body, a width direction length of the auxiliary layer located on the exterior body in the ventral region is longer than a width direction length of the auxiliary layer located on the exterior body in the dorsal region; <27> 13. The disposable diaper according to claim 12. <29> In a plan view of the diaper in an unfolded and maximum stretched state, in at least one of the abdominal region and the back region, the longitudinal end of the auxiliary layer is located outward in the longitudinal direction beyond the end of the crotch-side elastic member. <27> or <28> 13. The disposable diaper according to claim 12.

[0073] <30> The exterior body includes a ventral exterior body arranged in the ventral region and stretchable in the width direction, and a dorsal exterior body arranged in the dorsal region and stretchable in the width direction, When viewed from above in a spread and maximum stretched state of the diaper, the width of the end region of the auxiliary layer located on the ventral exterior body in the longitudinal direction is longer than the width of the end region of the auxiliary layer located on the rear exterior body in the longitudinal direction. <27> ~ <29> 13. The disposable diaper according to claim 12 . <31> The exterior body includes a ventral exterior body arranged in the ventral region and stretchable in the width direction, and a dorsal exterior body arranged in the dorsal region and stretchable in the width direction, In a plan view of the diaper in an unfolded and maximum stretched state, an end portion of the auxiliary layer located on the abdominal region side is disposed so as to be located outward in the longitudinal direction relative to an inner end portion of the abdominal-side outer body in the longitudinal direction. <27> ~ <30> 13. The disposable diaper according to claim 12 . <32> The diaper has a pair of side seal portions in which both side portions of the exterior body located in the abdominal region and the exterior body located in the dorsal region are joined to each other, The exterior body located in the rear region includes a rear extension portion extending inward in the longitudinal direction from an imaginary line connecting inner end edges of the side seal portions, In a plan view of the diaper in an unfolded and maximum stretched state, a longitudinal end of the auxiliary layer located on the rear region side is positioned longitudinally outward of an inner longitudinal end of the rear extension portion. <27> ~ <31> 13. The disposable diaper according to claim 12 .

[0074] <33> The exterior body includes a ventral exterior body arranged in the ventral region and stretchable in the width direction, and a dorsal exterior body arranged in the dorsal region and stretchable in the width direction, When viewed from above in a spread and maximum stretched state of the diaper, the widthwise length of the end region of the auxiliary layer located on the ventral exterior body in the longitudinal direction is longer than the widthwise length of the end region of the auxiliary layer located on the rear exterior body in the longitudinal direction; and The end of the auxiliary layer in the longitudinal direction located on the abdominal region side is located outward in the longitudinal direction from the inner end of the abdominal side exterior body. <27> ~ <32> 13. The disposable diaper according to claim 12 . <34> The intermediate adhesive region is disposed in the back region. When the adhesive region located on the inner end side in the longitudinal direction of the diaper from the intermediate adhesive region in a plan view in the unfolded and maximum stretched state of the diaper is defined as an inner adhesive region, The longitudinal end region of the auxiliary layer located on the rear region side overlaps with the inner adhesive region. <27> ~ <33> 13. The disposable diaper according to claim 12 . <35> The end region in the longitudinal direction of the auxiliary layer located on the rear region side is located outward in the longitudinal direction from the inner end portion in the longitudinal direction of the adhesive region. <34> 13. The disposable diaper according to claim 12.

[0075] <36> In at least one of the abdominal region and the back region, the longitudinal end of the auxiliary layer is located outward in the longitudinal direction beyond the end of the crotch side elastic member. <27> ~ <35> 13. The disposable diaper according to claim 12 . <37> the ventral region is free of the non-adhesive region; <1> ~ <36> 13. The disposable diaper according to claim 12 . <38> the ventral region does not have the intermediate adhesive region; The back region has the intermediate adhesive region. <1> ~ <37> 13. The disposable diaper according to claim 12 . <39> The exterior body includes a ventral exterior body arranged in the ventral region and stretchable in the width direction, and a dorsal exterior body arranged in the dorsal region and stretchable in the width direction. <1> ~ <38> 13. The disposable diaper according to claim 12 . <40> The intermediate adhesive region is disposed between an inner end portion and an outer end portion of the adhesive region in the longitudinal direction when the diaper is in a fully extended and unfolded state. <39> 13. The disposable diaper according to claim 12. <41> When the diaper is in a fully extended and flattened state, one end of the crotch-side elastic member overlaps with the non-adhesive region; The length of the overlap of the crotch side elastic member with the non-bonded region is preferably 150 mm or less, more preferably 130 mm or less, even more preferably 100 mm or less, still more preferably 50 mm or less, still more preferably 30 mm or less, and preferably 0 mm or more. <1> ~ <40> 13. The disposable diaper according to claim 12 . [Explanation of symbols]

[0076] 1. Disposable diapers 2. Absorbent body 3 Exterior body 3F Ventral exterior body 3R Dorsal exterior body 3E Dorsal extension 8 Exterior elastic member 35 Crotch side elastic member 40 Elastic member around the legs A Adhesion area F ventral region M Inseam area R dorsal region X Longitudinal direction Y Width direction

Claims

1. A disposable diaper having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a width direction perpendicular to the longitudinal direction, the disposable diaper comprising a ventral region and a dorsal region, and a crotch region located between the ventral region and the dorsal region, the disposable diaper having an absorbent main body disposed in a region from the ventral region to the dorsal region along the longitudinal direction, and an outer body disposed on a non-skin-facing side of the absorbent main body, The absorbent body has one or more thread-like or band-like crotch side elastic members arranged in both side regions in the width direction so as to extend in the longitudinal direction, The diaper has an adhesive region in which the absorbent body and the exterior body are adhered to each other in at least one of the abdominal region and the back region, When the adhesive region is viewed in a plan view along a longitudinal direction of the diaper in an unfolded and maximum elongated state, an intermediate adhesive region between a first virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to one end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, and a second virtual line segment which connects both widthwise outer ends of the adhesive region at a position closest to the other end in the longitudinal direction of the adhesive region and has a maximum length along the width direction, the intermediate adhesive region having a widthwise length shorter than the length of the first virtual line segment and the length of the second virtual line segment; A disposable diaper, wherein when viewed in a plane in the unfolded and maximum stretched state of the diaper, at least one end of the crotch side elastic member is located on both widthwise sides of the intermediate adhesive region and exists in a non-adhesive region where the absorbent body and the outer body are not adhered to each other.

2. The exterior body has a plurality of exterior body elastic members extending along a width direction, The disposable diaper according to claim 1 , wherein the non-adhesive region and the elastic member of the outer body are arranged so as to overlap each other in a plan view of the diaper in an unfolded and maximum stretched state.

3. The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, 3. The disposable diaper according to claim 1 or 2, wherein the longitudinal length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region and the outer adhesive region, the intermediate adhesive region being the longest, and the outer adhesive region being an intermediate length between the two regions.

4. The intermediate adhesive region is located in the ventral region or the dorsal region, In a plan view of the diaper in an unfolded and maximum stretched state, A bonding region located on the inner end side in the longitudinal direction from the intermediate bonding region is defined as an inner bonding region, When the adhesive region located on the outer end side in the longitudinal direction from the intermediate adhesive region is defined as the outer adhesive region, 3. The disposable diaper according to claim 1 or 2, wherein the longitudinal length of each adhesive region is the shortest among the inner adhesive region, the intermediate adhesive region and the outer adhesive region, the intermediate adhesive region is the longest, and the inner adhesive region has a length intermediate between the two regions.

5. The diaper has a pair of side seal portions in which both side portions of the exterior body located in the abdominal region and the exterior body located in the dorsal region are joined to each other, The disposable diaper according to any one of claims 1 to 4, wherein the outer casing located in the rear region has a rear extension portion extending longitudinally inward beyond an imaginary line connecting the longitudinal inner end edges of the side seal portions.

6. The disposable diaper according to claim 5 , wherein the back-side extension portion has leg-hole elastic members arranged to fit around the legs of a wearer when the diaper is worn.

7. one end region of the leg elastic member is located at the side seal portion and the other end region of the leg elastic member overlaps with the absorbent main body in a plan view, 7. The disposable diaper according to claim 6, wherein, in a plan view of the diaper in an unfolded and maximum stretched state, the other end region of the leg elastic member overlaps with an inner adhesive region, which is an adhesive region located on the inner end side in the longitudinal direction.

8. The disposable diaper according to any one of claims 1 to 7, wherein the absorbent body has an absorbent sheet comprising two identical or different fibrous sheets and particles of a water-absorbing polymer disposed between the fibrous sheets.

9. The absorbent body further includes an auxiliary layer disposed adjacent to the skin-facing surface of the absorbent sheet, The auxiliary layer is a mixed stack containing at least a water-absorbent natural fiber and a water-absorbent polymer, The disposable diaper according to claim 8 , wherein the longitudinal end of the auxiliary layer overlaps, in a plan view, an inner adhesive region, which is an adhesive region located on the longitudinal inner end side of at least one of the ventral region and the dorsal region.

10. When the diaper is in a fully extended and unfolded state, a longitudinal end of the auxiliary layer located in the abdominal region is located longitudinally outward of a longitudinal inner end of the outer casing located in the abdominal region, The disposable diaper according to claim 9 , wherein the widthwise length of the auxiliary layer located on the exterior body in the ventral region is longer than the widthwise length of the auxiliary layer located on the exterior body in the dorsal region.

11. 11. The disposable diaper according to claim 9 or 10, wherein, in a plan view of the diaper in an unfolded and maximum stretched state, in at least one of the ventral region and the dorsal region, the longitudinal ends of the auxiliary layer are positioned longitudinally outward beyond the ends of the crotch-side elastic members.

12. The disposable diaper according to any one of claims 1 to 11, wherein the abdominal region does not have the non-adhesive region.

13. The disposable diaper according to any one of claims 1 to 12, wherein the outer casing comprises a ventral outer casing arranged in the ventral region and stretchable in the width direction, and a dorsal outer casing arranged in the dorsal region and stretchable in the width direction.

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