Diaper and package

Abstract

This diaper comprises: an absorbent body including a front surface sheet disposed on a skin surface side of a wearer; a back surface sheet disposed on a non-skin surface side opposite to the skin surface side, and an absorbent core disposed between the front surface sheet and the back surface sheet; and a pair of fastening tabs extending outward in a lateral direction from the absorbent body. A guide mark for guiding a position at which the buttocks of the wearer are to be placed is formed on the absorbent body so as to be visible from the skin surface side. The guide mark is formed on a sheet material disposed between the front surface sheet and the absorbent core. The sheet material has, in a presence region that is a region in which the guide mark is present in a longitudinal direction, an outer region positioned outward relative to the absorbent core on at least one side in the lateral direction.

Description

Diaper and Package

[0001] The present disclosure relates to a diaper and a package.

[0002] Patent Document 1 describes a diaper with a guide mark for guiding the wearer's buttocks position, a surface sheet on which the guide mark is displayed, a back sheet (cover sheet), an absorbent core (absorbent body) disposed between the surface sheet and the back sheet, and a pair of fastening tabs (locking portions).

[0003] Japanese Patent Application Laid-Open No. 2014-230716

[0004] In the diaper as described above, the guide mark may be disposed in a region overlapping the absorbent core in order to guide the wearer's buttocks onto the absorbent core. However, when the wearer lies on the diaper, if this guide mark is covered by the wearer's buttocks, there is a possibility that the user cannot visually recognize the guide mark. In this case, it becomes difficult to place the wearer correctly on the diaper, and the diaper may be worn in a displaced state with respect to the wearer.

[0005] An object of the present disclosure is to provide a diaper that can suppress displacement with respect to a wearer and a package that houses the diaper.

[0006] A diaper according to one embodiment is a diaper that extends in a longitudinal direction connecting the ventral side to the dorsal side of the wearer and a transverse direction perpendicular to the longitudinal direction, and includes a surface sheet disposed on the skin side of the wearer, a back sheet disposed on the non-skin side opposite to the skin side, and an absorbent body including an absorbent core including at least one layer disposed between the surface sheet and the back sheet, and a pair of fastening tabs extending outward in the transverse direction from the absorbent body. A guide mark for guiding the position where the wearer's buttocks should be placed is formed on the absorbent body so as to be visible from the skin side. The guide mark is formed on a sheet material disposed between the surface sheet and the absorbent core. The sheet material has an outer region located outside at least one layer of the absorbent core on at least one side in the transverse direction in an existing region which is a region where the guide mark exists in the longitudinal direction.

[0007] According to this disclosure, it is possible to provide a diaper that can suppress displacement relative to the wearer, and a package for containing the diaper.

[0008] This is a plan view of the diaper according to the embodiment, seen from the skin side. This is a plan view of the diaper in Figure 1, seen from the non-skin side. This is a cross-sectional view of the diaper along line III-III in Figure 1, seen from the skin side. This is an enlarged view of the area around the guide mark of the diaper according to the first modification, seen from the skin side. This is an enlarged view of the area around the guide mark of the diaper according to the second modification, seen from the skin side. (a) and (b) are cross-sectional views of the sheet material of the diaper according to the third modification. This is a cross-sectional view of the absorbent core and sheet material of the diaper according to the fourth modification. This is a front view of the package according to the embodiment. This is an enlarged view of the diaper included in the package of Figure 9.

[0009] At least embodiments [1] to

[11] are disclosed in this specification and the accompanying drawings.

[0010] [1] A diaper extending in a longitudinal direction connecting the ventral side to the dorsal side of a wearer, and in a transverse direction perpendicular to the longitudinal direction, comprising: an absorbent body including a surface sheet disposed on the skin side of the wearer, a back sheet disposed on the non-skin side opposite to the skin side, and an absorbent core including at least one layer disposed between the surface sheet and the back sheet; and a pair of fastening tabs extending outward in the transverse direction from the absorbent body, wherein the absorbent body has guide marks formed so as to be visible from the skin side for guiding the position where the wearer's buttocks should be placed, the guide marks are formed on a sheet material disposed between the surface sheet and the absorbent core, and the sheet material has an outer region located outside the at least one layer of the absorbent core on at least one side in the transverse direction in the presence region where the guide marks are located in the longitudinal direction.

[0011] In the diaper described in [1] above, the sheet material has an outer region located outside at least one layer of the absorbent core on at least one side in the horizontal direction, in the region where the guide mark exists in the vertical direction. This allows the user to see the outer region of the sheet material from outside the wearer's buttocks, even when the wearer's buttocks are positioned on the absorbent core. Therefore, the user can infer the position of the guide mark based on the position of the outer region of the sheet material, making it easy to confirm whether the wearer's buttocks are correctly positioned in relation to the diaper. Furthermore, the outer region of the sheet material may also be visible from the non-skin side. In this case, an additional benefit is obtained: the position of the diaper can be confirmed even when the diaper is folded in half or when the diaper is worn on the wearer. Thus, the above diaper can suppress misalignment relative to the wearer.

[0012] [2] The diaper of [1], wherein the outer region has regions located on both sides in the lateral direction of the presence region that are located outside the at least one layer of the absorbent core.

[0013] According to the configuration described in [2] above, the position of the sheet material can be confirmed on both sides in the lateral direction of the absorbent body.

[0014] [3] The diaper of [1] or [2], wherein the surface sheet comprises a center sheet covering the absorbent core and a pair of side sheets covering both lateral sides of the center sheet, the side sheets include leak-proof gathers configured to stand upright by an elastic member that contracts in the longitudinal direction, the leak-proof gathers include lateral fixing portions that serve as fulcrums for the standing of the leak-proof gathers, and the outer region extends beyond the lateral fixing portions.

[0015] According to the configuration described in [3] above, for example, even when the leak-proof gathers are in an upright position when the wearer is laid down on the diaper, the outer area extends beyond the lateral fixing portion of the leak-proof gathers, so the position of the sheet material can be confirmed from the outside in the lateral direction of the leak-proof gathers.

[0016] [4] The diaper of [3] wherein the lateral fixing portion of the leak-proof gather is fixed to the center sheet by fusion.

[0017] According to the configuration described in [4] above, the thickness of the center sheet and side sheet in the lateral fixing portion (fused portion) can be reduced by fusing the lateral fixing portion. As a result, the outer region of the sheet material becomes easier to see through the lateral fixing portion, and the position of the sheet material can be confirmed more easily.

[0018] [5] A diaper from any of [1] to [4] in which at least a portion of the outer region is colored.

[0019] According to the configuration described in [5] above, the position of the sheet material can be more easily confirmed.

[0020] [6] The diaper according to any of [1] to [5], wherein the guide mark has an outer portion located outside the at least one layer of the absorbent core on at least one side in the lateral direction.

[0021] According to the configuration described in [6] above, even when the wearer's buttocks are placed on the absorbent core, the position of the guide mark can be easily confirmed from the outside of the wearer's buttocks.

[0022] [7] The diaper of [6], wherein the outer portion has portions on both sides in the lateral direction that are located outside the at least one layer of the absorbent core.

[0023] According to the configuration described in [7] above, the location of the guide mark can be more easily confirmed.

[0024] [8] The absorbent body has a pair of flap portions that extend outward in the lateral direction from the absorbent body, and a fold line is formed at the inner end of the flap portion in the lateral direction, which serves as a pivot point when the flap portion is folded inward in the lateral direction, and the outer region extends beyond the fold line, any of the diapers [1] to [7].

[0025] According to the configuration described in [8] above, the sheet material is positioned to overlap with the fold line, thereby improving the rigidity of the absorbent body at the fold line. As a result, the folded flap portion can be easily opened.

[0026] [9] The outer region includes an overlapping region in which multiple different parts contained in the sheet material overlap, any of the diapers from [1] to [8].

[0027] According to the configuration described in [9] above, by providing the overlapping region of the sheet material in the outer region, the appearance of the part where the overlapping region exists can be made darker than other parts, thereby improving visibility and making it easier to confirm the position of the sheet material.

[0028]

[10] Any diaper from [1] to [9] wherein the lateral ends of the guide mark are located inward from the lateral ends of the absorbent core.

[0029] According to the configuration described in

[10] above, the wearer's buttocks can be effectively guided onto the absorbent core.

[0030]

[11] A package comprising a plurality of diapers as described in [1], and a packaging body for storing a plurality of the plurality of diapers in a folded state, wherein the plurality of diapers in a folded state stored in the packaging body include at least a first diaper in which the lateral end of the outer region reaches a first position in the absorbent body, and a second diaper in which the lateral end of the outer region reaches a second position different from the first position in the absorbent body, wherein at least a portion of the lateral end of the outer region of at least one of the first diaper and the second diaper is visible when folded.

[0031] According to the configuration described in

[11] above, the lateral edge of the outer region of at least one of the multiple diapers contained in the packaging can be seen. Furthermore, the appearance of the lateral edge of the outer region (including cases where the edge is not visible) is not the same for all of the multiple diapers. In other words, the multiple diapers are contained in the packaging such that at least one diaper has a different appearance from the others. Therefore, the user can easily check the remaining number of diapers and the rate of consumption by using the location of such a differently appearing diaper as a guide.

[0032] Embodiments of this disclosure will be described below with reference to the drawings. In the following description, the same or equivalent elements will be denoted by the same reference numeral, and redundant descriptions will not be repeated. The dimensional ratios in the drawings do not necessarily correspond to those described.

[0033] [Embodiment of the Diaper] The configuration of the diaper 1 according to the embodiment will be described with reference to Figures 1 to 3. Figure 1 is a plan view of the diaper 1 as seen from the skin-facing side Z1. Figure 2 is a plan view of the diaper 1 as seen from the non-skin-facing side Z2. Figure 3 is a schematic cross-sectional view of the diaper 1 along the line III-III shown in Figure 1. Figures 1 and 2 show the diaper 1 in an unfolded state, stretched to a state where no wrinkles are formed. In the following description, unless otherwise specified, the positional relationships will be described in the unfolded state. Note that in the cross-sectional view of Figure 3, for the sake of explanation, each member is shown spaced apart in the thickness direction Z, but in the actual product they are in contact in the thickness direction Z.

[0034] Diaper 1 is a tape-type disposable diaper. Diaper 1 may be a child's diaper or an adult's diaper. In the following description, the person wearing Diaper 1 is referred to as the "wearer," and the person who puts Diaper 1 on the wearer is referred to as the "user." Typically, the wearer is a child or a person receiving care, and the user is a parent or caregiver.

[0035] As shown in Figure 1, the diaper 1 extends in the transverse direction X, which is aligned with the wearer's waist, and in the longitudinal direction Y, which connects the wearer's ventral side to their back. The transverse direction X corresponds to the width direction of the diaper 1, and the longitudinal direction Y corresponds to the length direction of the diaper 1. The transverse direction X and the longitudinal direction Y are perpendicular to each other. The thickness direction Z is perpendicular to the transverse direction X and the longitudinal direction Y, and includes a skin-facing side Z1 that faces the wearer's skin when worn, and a non-skin-facing side Z2 that faces away from the wearer's skin when worn. The diaper 1 is worn so as to cover the wearer's abdomen, crotch, and back.

[0036] Diaper 1 comprises an absorbent body 2 and a pair of fastening tabs 90. The absorbent body 2 has a ventral edge 2F located on one side in the longitudinal direction Y and a dorsal edge 2R located on the other side in the longitudinal direction Y. When worn, the ventral edge 2F is positioned on the ventral side in the direction of the wearer's waist, and the dorsal edge 2R is positioned on the dorsal side in the direction of the wearer's waist. The distance in the longitudinal direction Y between the ventral edge 2F and the dorsal edge 2R is the total length (maximum length) of the absorbent body 2. In the following description, the side on which the ventral edge 2F is located relative to the dorsal edge 2R in the longitudinal direction Y is referred to as the ventral side, and the opposite side is referred to as the dorsal side.

[0037] The absorbent body 2 has a dorsal region 51 located on the dorsal side, a ventral region 52 located on the ventral side, and an intermediate region 53 located between the dorsal region 51 and the ventral region 52. The width of the intermediate region 53 in the lateral direction X is smaller than the width of the dorsal region 51 and the ventral region 52 in the lateral direction X.

[0038] The absorbent body 2 has a pair of flap portions 15 that protrude outward in the lateral direction X. The width between the outer ends of each of the pair of flap portions 15 in the lateral direction X corresponds to the maximum width of the absorbent body 2. A fold line FL is formed at the inner end of the flap portion 15 in the lateral direction X (the end opposite to the fastening tab 90 described later in the lateral direction X), which serves as a pivot point when the flap portion 15 is folded inward in the lateral direction X. The fold line FL extends along the vertical direction Y and is formed at a position that overlaps, for example, with the inner end in the lateral direction X of the lateral fixing portion 82 of the leak-proof gather 80 described later. The fold line FL is located inward in the lateral direction X from the plurality of elastic members 40.

[0039] Each of the pair of flap portions 15 is provided with a pair of fastening tabs 90. The pair of fastening tabs 90 extend outward in the lateral direction X from the side edge 2S of the absorbent body 2. Each of the pair of fastening tabs 90 has a base sheet 91 joined to the flap portion 15 and a joining portion 92 provided on the base sheet 91. The joining portion 92 is located on the skin-side Z1 surface of the base sheet 91. The joining portion 92 is, for example, a mechanical fastener and is configured to be joined to a target portion 48 formed on the non-skin-side Z2 of the absorbent body 2.

[0040] As shown in Figure 2, the target portion 48 is provided on the non-skin side Z2 of the ventral region 52 of the absorbent body 2. The target portion 48 has a band-like shape extending in the lateral direction X. The target portion 48 is positioned ventrally to the pair of fastening tabs 90 and engages with the pair of fastening tabs 90. Alternatively, the absorbent body 2 may not have a target portion 48, and the joining portion 92 of the pair of fastening tabs 90 may be directly joined to the back sheet 20 of the absorbent body 2, which will be described later.

[0041] As shown in FIGS. 1 to 3, the absorbent body 2 includes a top sheet 10, a back sheet 20, and an absorbent core 30. The top sheet 10 forms the surface of the absorbent body 2 that faces the wearer and is disposed on the skin surface side Z1. The top sheet 10 includes a center sheet 11 disposed at the center in the transverse direction X and covering the absorbent core 30, and a pair of side sheets 12 covering both sides of the center sheet 11 in the transverse direction X. The center sheet 11 is composed of, for example, a liquid-permeable non-woven fabric that allows the urine of the wearer to permeate toward the absorbent core 30 side, and the side sheet 12 is composed of, for example, a liquid-impermeable non-woven fabric.

[0042] As shown in FIG. 3, the inner portions of the pair of side sheets 12 in the transverse direction X are folded back to the non-skin surface side Z2. A pair of elastic members 13 extending in the longitudinal direction Y are disposed between the folded-back pair of side sheets 12. The pair of side sheets 12 and the pair of elastic members 13 constitute a pair of leak-proof gathers 80. The pair of leak-proof gathers 80 are upright leak-proof gathers and are disposed on the skin surface side Z1 with respect to the absorbent core 30.

[0043] As shown in FIG. 1, the pair of leak-proof gathers 80 are disposed outside the absorbent core 30 in the transverse direction X to suppress leakage of urine excreted into the absorbent core 30 in the transverse direction X. Each of the pair of leak-proof gathers 80 includes an elastic member 13 extending in the longitudinal direction Y, a standing portion 81 that stands up due to the contraction of the elastic member 13, a horizontal fixing portion 82 that serves as a standing fulcrum of the standing portion 81 in the transverse direction X, and a vertical fixing portion 83 that serves as a standing fulcrum of the standing portion 81 in the longitudinal direction Y.

[0044] The elastic member 13 extends in the longitudinal direction Y along the inner edge in the transverse direction X of the side sheet 12. The elastic member 13 is composed of a stretchable material such as rubber or spandex that can contract in the length direction, for example. The elastic members 13 of the pair of leak-proof gathers 80 are spaced apart from each other across the longitudinal center line CW passing through the center of the absorbent body 2 in the transverse direction X and are fixed to the side sheet 12 in a state of extending in the longitudinal direction Y. The end portion on the back side of the elastic member 13 is disposed in the back side region 51, and the end portion on the ventral side of the elastic member 13 is disposed in the ventral side region 52.

[0045] The lateral fixing portion 82 is formed on the side sheet 12 at a position outside the lateral direction X of the upright portion 81, covering substantially the entire area of ​​the absorbent body 2 in the vertical direction Y. That is, the lateral fixing portion 82 is positioned outside the absorbent core 30 in the lateral direction X. The lateral fixing portion 82 is part of the side sheet 12 and is fixed to the center sheet 11 by fusion. Examples of fusion include thermal fusion by thermal embossing and sonic processing. The lateral fixing portion 82 serves as the upright fulcrum of the upright portion 81 in the lateral direction X.

[0046] The vertical fixing portion 83 is formed inward in the lateral direction X relative to the horizontal fixing portion 82. The vertical fixing portion 83 includes a dorsal fixing portion 84 positioned in the dorsal region 51 and a ventral fixing portion 85 positioned in the ventral region 52. The dorsal fixing portion 84 and the ventral fixing portion 85 are part of the side sheet 12 and are fixed to the center sheet 11. The dorsal fixing portion 84 and the ventral fixing portion 85 serve as the dorsal and ventral support points of the upright portion 81, respectively.

[0047] The upright portion 81 is formed between the dorsal fixing portion 84 and the ventral fixing portion 85. That is, the upright portion 81 is positioned inward of the lateral fixing portion 82 in the lateral direction X and inward of the vertical fixing portion 83 in the vertical direction Y. The upright portion 81 is a part of the side sheet 12 that is not fixed to the center sheet 11. An elastic member 13 is connected to the upright portion 81 in an extended state in the vertical direction Y. When the elastic member 13 contracts in the vertical direction Y, the absorbent body 2 deforms in a closing direction, and the upright portion 81 rises up starting from the lateral fixing portion 82. In other words, the leak-proof gather 80 is configured to stand up by the elastic member 13 that contracts in the vertical direction Y. In this way, urine leakage is prevented when the upright portion 81 stands up in a position that sandwiches the absorbent core 30 from the lateral direction X.

[0048] The back sheet 20 forms the surface of the absorbent body 2 that is positioned on the outside during wear, and is disposed on the non-skin surface side Z2. The back sheet 20 includes a liquid-impermeable back film 21 and a back non-woven fabric 22 that is positioned on the non-skin surface side Z2 of the back film 21. The width of the back film 21 in the lateral direction X is formed to be shorter than the width of the back non-woven fabric 22 in the lateral direction X, and the back non-woven fabric 22 may extend to both sides in the lateral direction X beyond the back film 21. The back non-woven fabric 22 constitutes the outermost layer of the diaper 1.

[0049] The absorbent core 30 is disposed between the front sheet 10 and the back sheet 20. The absorbent core 30 contains, for example, an absorbent material having water absorption and absorbs the wearer's urine. The absorbent material is constituted by, for example, pulp fibers and a superabsorbent polymer (SAP). As shown in FIG. 3, the upper surface 30a on the skin surface side Z1 and the lower surface 30b on the non-skin surface side Z2 of the absorbent core 30 may be covered by a core wrap 38. The absorbent core 30 is disposed substantially at the center in the lateral direction X of the absorbent body 2.

[0050] The absorbent core 30 has a dorsal edge 30R and a ventral edge 30F. The dorsal edge 30R of the absorbent core 30 has a width W1 in the lateral direction X. The width W1 is the maximum width of the absorbent core 30. The width W1 of the dorsal edge 30R is larger than the distance d between a pair of non-erect leakage-preventing gathers 80. The ventral edge 30F of the absorbent core 30 has, for example, the same width as the dorsal edge 30R. Note that the absorbent core 30 does not necessarily have the maximum width W1 at the edges 30R and 30F. For example, when the absorbent core 30 has a shape in which the corners on both sides in the lateral direction X of the edges 30R and 30F are cut out, the absorbent core 30 may have the maximum width W1 at a position closer to the center in the longitudinal direction Y of the absorbent core 30 than the edges 30R and 30F. A constricted region 43 where the width of the absorbent core 30 is narrowed is formed between the ventral edge 30F and the dorsal edge 30R. The constricted region 43 is, for example, a region of the absorbent core 30 in which the width in the lateral direction X is narrowed by 10% or more with respect to the widths W1 of the ventral edge 30F and the dorsal edge 30R.

[0051] The constricted region 43 includes a narrowed portion 36 in which the width is narrowest in the lateral direction X. The width of the constricted region 43 is continuously narrowed from the dorsal edge 30R toward the narrowed portion 36. Similarly, the width of the constricted region 43 is continuously narrowed from the ventral edge 30F toward the narrowed portion 36. The narrowed portion 36 is positioned near the wearer's crotch when the wearer is wearing the diaper 1.

[0052] As shown in Figure 1, the diaper 1 further includes an elastic member 40 that is expandable in the longitudinal direction Y. The elastic member 40 is positioned outside the elastic member 13 in the transverse direction X. The dorsal end of the elastic member 40 is positioned in the dorsal area 51, and the ventral end of the elastic member 40 is positioned in the ventral area 52. The elastic member 40 is made of an elastic material such as rubber or spandex that is contractible in the longitudinal direction Y, and extends in the longitudinal direction Y between the surface sheet 10 and the back sheet 20 of the absorbent body 2. When the diaper 1 is worn, the elastic member 40 contracts in the longitudinal direction Y, causing the side edge 2S of the absorbent body 2 to fit around the wearer's legs. That is, the elastic member 40 forms a leg-lengthening gather that expands and contracts along the wearer's legs. Note that the diaper 1 may include multiple elastic members 40. As shown in Figure 1, multiple elastic members 40 are arranged in the transverse direction X outside the elastic member 13 and extend in the longitudinal direction Y parallel to each other.

[0053] The absorbent body 2 has a guide mark 60 that indicates the position where the wearer's buttocks should be placed. The guide mark 60 is printed on the absorbent body 2 so that it is visible from the skin side Z1. As shown in Figure 1, in order to make the user aware that this is the position where the wearer's buttocks should be placed, the guide mark 60 has a roughly W-shape that resembles the buttocks. Because the guide mark 60 with this shape is formed on the absorbent body 2, the user of the diaper 1 will associate the shape of the guide mark 60 with the shape of the buttocks and recognize that the wearer's buttocks should be placed according to the guide mark 60.

[0054] As shown in Figure 3, the guide mark 60 is printed on a sheet material 55 placed between the surface sheet 10 and the absorbent core 30. The sheet material 55 is, for example, tissue containing pulp. The sheet material 55 is formed in a rectangular shape with the transverse direction X as the longitudinal direction. The sheet material 55 is colored throughout. The sheet material 55 is colored, for example, yellow. However, the sheet material 55 may be colored in a color other than yellow. The skin-side Z1 surface of the sheet material 55 is bonded to the center sheet 11 of the surface sheet 10, and the non-skin-side Z2 surface of the sheet material 55 is bonded to the core wrap 38 of the absorbent core 30. For bonding the sheet material 55, for example, a hot melt adhesive is used. However, only one of the skin-side Z1 and non-skin-side Z2 surfaces of the sheet material 55 may be bonded to the surface sheet 10 or the core wrap 38 of the absorbent core 30.

[0055] Furthermore, the distance between the ventral end of the sheet material 55 and the ventral end of the guide mark 60 in the vertical direction Y is preferably 1x or less, more preferably 1 / 2x or less, of the length of the guide mark 60 in the vertical direction Y. In this embodiment, this distance is 1 / 2x the length of the guide mark 60 in the vertical direction Y. Similarly, the distance between the back end of the sheet material 55 and the back end of the guide mark 60 in the vertical direction Y is also preferably 1x or less, more preferably 1 / 2x or less, of the length of the guide mark 60 in the vertical direction Y. In this embodiment, this distance is 1 / 2x the length of the guide mark 60 in the vertical direction Y. When the length of the sheet material 55 in the vertical direction Y is configured in this way, it becomes easier to determine the position of the guide mark 60 from the position of the end of the sheet material 55 in the horizontal direction X (the end including the outer region 57).

[0056] As shown in Figure 1, the sheet material 55 is positioned in the buttock region, which is the second region from the dorsal side when the absorbent body 2 is divided into four sections in the longitudinal direction Y. The buttock region is located between the transverse center line CL1 of the absorbent body 2 and the center line CL2 between the transverse center line CL1 and the dorsal edge 2R. The transverse center line CL1 is the center line between the ventral edge 2F and the dorsal edge 2R in the longitudinal direction Y, and is the part where a fold is formed when the diaper 1 is folded in half in the longitudinal direction Y. Note that the sheet material 55 may be positioned in a region other than the buttock region.

[0057] The guide mark 60 is printed in the center of the sheet material 55. The guide mark 60 is printed on the non-skin side Z2 (absorbent core 30 side) of the sheet material 55. The guide mark 60 printed on the non-skin side Z2 of the sheet material 55 is visible from the skin side Z1 through the center sheet 11 and the sheet material 55. The guide mark 60 is printed in, for example, blue or green. However, the guide mark 60 may be printed in a color other than blue and green. When viewed from the skin side Z1, the guide mark 60 overlaps with the constricted region 43 of the absorbent core 30.

[0058] Figure 4 is an enlarged view of the area around the guide mark 60 of the diaper 1 in Figure 1, as seen from the skin side Z1. In Figure 4, the elastic member 40 is omitted. As shown in Figure 4, the sheet material 55 has a presence region 54 in the vertical direction Y, which is the area where the guide mark 60 exists. The presence region 54 is the area from the ventral end to the dorsal end of the guide mark 60 in the vertical direction Y. That is, the presence region 54 is the area between virtual lines L1 and L2, when virtual lines L1 and L2 are defined, respectively, passing through the ventral end of the guide mark 60 and parallel to the transverse direction X. The presence region 54 is formed, for example, in a rectangular shape. The width of the presence region 54 in the transverse direction X is equal to the width of the sheet material 55 in the transverse direction X. The length of the presence region 54 in the vertical direction Y is equal to the distance between virtual lines L1 and L2.

[0059] The existing region 54 includes an inner region 56 and an outer region 57. The inner region 56 is the region that overlaps with the absorbent core 30 in the thickness direction Z. The outer region 57 is the region located outside the absorbent core 30 on both sides of the existing region 54 in the lateral direction X. The outer region 57 has two regions 57a and 57b located outside the absorbent core 30 on both sides of the existing region 54 in the lateral direction X. In Figure 4, regions 57a and 57b are shown by dashed hatching.

[0060] Regions 57a and 57b are located on both sides of the inner region 56 in the lateral direction X. Region 57a ​​is located on one side in the lateral direction X (left side in Figure 4), and region 57b is located on the other side in the lateral direction X (right side in Figure 4). Regions 57a and 57b extend beyond the absorbent core 30 in the lateral direction X and do not overlap with the absorbent core 30 in the thickness direction Z. The outer end 57c of the outer region 57 in the lateral direction X is located inside the lateral fixing portion 82 in the lateral direction X. Also, since the sheet material 55 is colored throughout, the outer region 57 is also colored throughout.

[0061] The guide mark 60 is printed in the inner region 56 of the area 54 of the sheet material 55. The edges 60c on both sides of the guide mark 60 in the lateral direction X are located inward from the edges 30c on both sides of the absorbent core 30 in the lateral direction X. In other words, the guide mark 60 does not protrude from the absorbent core 30 and overlaps with the absorbent core 30 in the thickness direction Z.

[0062] [Function and Effects of the Diaper] In diaper 1, the sheet material 55 has an outer region 57 located outside the absorbent core 30 on both sides in the horizontal direction X in the area 54 where the guide mark 60 exists in the vertical direction Y. As a result, even when the wearer's buttocks are positioned on the absorbent core 30, the wearer can see the outer region 57 of the sheet material 55 from outside the wearer's buttocks. In this embodiment, since the outer region 57 is colored, the color of the outer region 57 visible through the surface sheet 10 can be seen. Even if the outer region 57 is not colored and is white, since the surface sheet 10 is relatively thin, the outline of the outer edge of the sheet material 55, including the outer region 57 visible through it, can be seen. Therefore, the wearer can infer the position of the guide mark 60 based on the position of the outer region 57 of the sheet material 55, making it easy to confirm whether the wearer's buttocks are correctly positioned relative to the diaper 1. Furthermore, the outer region 57 of the sheet material 55 may also be visible from the non-skin side Z2. More specifically, since the outer region 57 of the sheet material 55 does not overlap with the relatively thick absorbent core 30, the back sheet 20 may be visible when the absorbent body 2 is viewed from the non-skin side Z2. In this case, an additional benefit is obtained in which the position of the diaper 1 can be confirmed even when the diaper 1 is folded in half or when the diaper 1 is worn on the wearer. Therefore, the above diaper can suppress misalignment relative to the wearer.

[0063] Furthermore, the outer region 57 has regions 57a and 57b located outside the absorbent core 30 on both sides in the lateral direction X of the presence region 54. This allows the position of the sheet material 55 to be confirmed on both sides in the lateral direction X of the absorbent body 2. Therefore, the position of the diaper 1 can be confirmed more easily than when the outer region 57 has only one of regions 57a or 57b.

[0064] Furthermore, the entire outer region 57 is colored. This makes it easier to confirm the position of the sheet material 55. In other words, the outer region is made more conspicuous compared to when the outer region 57 is not colored. Also, because the entire outer region 57 is colored, it is made more conspicuous compared to when only a part of the outer region 57 is colored. Therefore, the position of the sheet material 55 is made easier to confirm.

[0065] Furthermore, the lateral ends 60c of the guide mark 60 are positioned inward from the lateral ends 30c of the absorbent core 30. This effectively guides the wearer's buttocks onto the absorbent core 30.

[0066] [Variations of Diapers] Although a diaper according to the embodiments of this disclosure has been described above, this disclosure is not limited to the above embodiments. Various materials and shapes can be used for the materials and shapes of each component, not limited to those described above.

[0067] Figure 5 is an enlarged view of the area around the guide mark 60 of diaper 1A according to the first modified example, as seen from the skin side Z1. Diaper 1A differs from diaper 1 according to the embodiment in that the outer region 57 of the sheet material 55 extends beyond the lateral fixing portion 82 of the leak-proof gather 80 on both sides in the lateral direction X, and the outer region 57 extends beyond the fold line FL, which is the pivot point when the flap portion 15 is folded, on both sides in the lateral direction X. That is, in diaper 1A, the outer end 57c of the outer region 57 in the lateral direction X is located outside the lateral fixing portion 82. Furthermore, the end 57c is located outside the fold line FL. For this reason, the outer region 57 of the sheet material 55 includes a portion that overlaps with the lateral fixing portion 82 of the leak-proof gather 80.

[0068] In the first modified diaper 1A, the outer region 57 extends beyond the lateral fixing portion 82 of the leak-proof gather 80 on both sides in the lateral direction X. As a result, even when the leak-proof gather 80 is in an upright position when the wearer is laid down on the diaper 1A, the outer region 57 extends beyond the lateral fixing portion 82 of the leak-proof gather 80, so the position of the sheet material 55 can be confirmed from the outside of the leak-proof gather 80 in the lateral direction X. However, the outer region 57 may extend beyond the lateral fixing portion 82 on only one side in the lateral direction X. In this case as well, the same effect can be obtained. That is, in order to obtain the above-mentioned effect, the outer region 57 only needs to extend beyond the lateral fixing portion 82 on at least one side in the lateral direction X.

[0069] Furthermore, in the diaper 1A according to the first modified example, the lateral fixing portion 82 of the leak-proof gather 80 is fixed to the center sheet 11 by fusion. By fusing the lateral fixing portion 82, the thickness of the center sheet 11 and side sheet 12 in the lateral fixing portion 82 (fused portion) can be reduced. As a result, the outer region 57 that overlaps with the lateral fixing portion 82 becomes easier to see through (through the) the lateral fixing portion 82, and the position of the sheet material 55 can be confirmed more easily.

[0070] Furthermore, in the diaper 1A according to the first modified example, the outer region 57 extends beyond the fold line FL, which serves as the pivot point when the flap portion 15 is folded in the lateral direction X. As a result, the sheet material 55 is positioned to overlap with the fold line FL, thereby improving the rigidity of the absorbent body 2 at the fold line FL. Consequently, the folded flap portion 15 can be easily opened. However, the outer region 57 may extend to the fold line FL on only one side in the lateral direction X. Even in this case, the same effect can be obtained. That is, in order to obtain the above-mentioned effect, the outer region 57 only needs to extend to the fold line FL on at least one side in the lateral direction X.

[0071] Figure 6 is an enlarged view of the area around the guide mark 60 of diaper 1B according to the second modified example, as seen from the skin side Z1. Diaper 1B differs from diaper 1 according to the embodiment in that the guide mark 60 has outer portions 61 located outside the absorbent core 30 on both sides in the lateral direction X. The outer portions 61 have two parts 61a and 61b located outside the absorbent core 30 on both sides in the lateral direction X.

[0072] In the diaper 1B according to the second modified example, the outer portion 61 of the guide mark 60 is located outside the absorbent core 30 on both sides in the lateral direction X. Therefore, even when the wearer's buttocks are positioned on the absorbent core 30, the outer portion 61 located outside the absorbent core 30 can be seen, making it easy to confirm the position of the guide mark 60 from the outside of the wearer's buttocks. Furthermore, the outer portion 61 has two parts 61a and 61b located outside the absorbent core 30 on both sides in the lateral direction X. This allows the position of the guide mark 60 to be seen on both sides of the absorbent body 2 in the lateral direction X. Therefore, it is easier to confirm the position of the diaper 1B compared to the case where the guide mark 60 has only one of the parts 61a and 61b.

[0073] Figures 7(a) and 7(b) are cross-sectional views of the sheet material 55 of diaper 1C according to a third modified example. Diaper 1C differs from diaper 1 according to the embodiment in that the outer region 57 includes an overlapping region 58. The overlapping region 58 is a region where multiple different parts 59 included in the sheet material 55 overlap.

[0074] As an example of the overlapping region 58, as shown in Figure 7(a), the overlapping region 58 may be formed in a double layer by folding the end portion 55c of the sheet material 55 in the lateral direction X inward. In this example, two different parts of the sheet material 55 overlap in the overlapping region 58. Specifically, the peripheral portion of the end portion 55c of the sheet material 55 and the portion of the sheet material 55 other than the peripheral portion overlap.

[0075] Another example of an overlapping region 58 is that, as shown in Figure 7(b), the overlapping region 58 may be formed by wrinkles in the sheet material 55. In this example, wrinkles formed on the skin side Z1 of the sheet material 55 fold in the lateral direction X, thereby forming the overlapping region 58. The wrinkles in the sheet material 55 fold outward and are in contact with the portion of the sheet material 55 other than the portion that forms the wrinkles. In this example, three distinct portions 59 contained in the sheet material 55 overlap in the thickness direction Z. Specifically, two portions that are folded back to form the wrinkles of the sheet material 55 and the portion other than these two portions overlap in the thickness direction Z.

[0076] In the third modified diaper 1C, by providing an overlapping region 58 of the sheet material 55 in the outer region 57, the thickness of the overlapping region 58 can be made greater than the thickness of the other parts (the parts without overlap). This makes the area where the overlapping region 58 is located appear darker than the other parts, improving visibility and making it easier to confirm the position of the sheet material 55.

[0077] Figure 8 is a cross-sectional view of the absorbent core 30D and sheet material 55 of the diaper 1D according to the fourth modification. The diaper 1D according to the fourth modification differs from diaper 1 in that it has an absorbent core 30D instead of absorbent core 30. The absorbent core 30D differs from absorbent core 30 in that it has a multilayer structure (two-layer structure) including a first layer 31 and a second layer 32.

[0078] In the absorbent core 30D, the first layer 31 and the second layer 32 are laminated in the thickness direction Z. The second layer 32 is positioned on the skin side Z1 relative to the first layer 31. The width in the lateral direction X of the second layer 32 is smaller than the width in the lateral direction X of the first layer 31. The end 57c of the outer region 57 of the sheet material 55 is located inside the end 31c of the first layer 31 in the lateral direction X. The end 57c of the sheet material 55 is located outside the end 32c of the second layer 32 in the lateral direction X. Regions 57a and 57b of the outer region 57 of the sheet material 55 are located inside the end 31c of the first layer 31. That is, regions 57a and 57b overlap with the first layer 31 in the thickness direction Z outside the end 32c of the second layer 32 of the absorbent core 30D.

[0079] In the diaper 1D according to the fourth modification, the outer region 57 is located outside the second layer 32 of the absorbent core 30D on both sides in the lateral direction X within the existing region 54. Furthermore, the outer region 57 is not located outside the first layer 31 of the absorbent core 30D, but is located inside the first layer 31. Thus, the outer region 57 does not necessarily have to be located outside the first layer 31 in the lateral direction X, but is located outside at least a part of the absorbent core 30 in the thickness direction Z (in this example, the second layer 32), so that even when the wearer's buttocks are placed on that part, the outer region 57 of the sheet material 55 can be seen from outside the wearer's buttocks. More specifically, when the absorbent core 30D has a multilayer structure as described above (a two-layer structure in this example), the thickest part of the absorbent core 30D (the central part in the lateral direction X) often corresponds to the place where the wearer's buttocks rest (the central part). Therefore, even when the outer region 57 is provided so as to extend beyond the central part in the lateral direction X (i.e., to the outside of at least one of the multiple layers of the absorbent core 30D constituting the multilayer structure), the same effect as that of the diaper 1 can be obtained.

[0080] In other words, when the absorbent core 30D includes multiple layers, as in the fourth modified example diaper 1D, the outer region 57 only needs to be located outside in the lateral direction X of any one of the layers of the absorbent core 30D, and does not necessarily need to be located outside in the lateral direction X of all the layers of the absorbent core 30D. Thus, the outer region 57 only needs to be located outside in the lateral direction X of at least one of the layers of the absorbent core 30D. However, from the viewpoint of further improving the visibility of the outer region 57, it is preferable that the outer region 57 is provided so as to extend outside in the lateral direction X of all the layers constituting the absorbent core 30D beyond their lateral edges in the lateral direction X.

[0081] The configurations of the above embodiments and the first to fourth modified examples may be combined in any way that is not contradictory. For example, the configurations of the first and second modified examples may be applied to the diaper 1C of the third modified example. The configurations of the first to third modified examples may be applied to the diaper 1D of the fourth modified example.

[0082] In the diaper 1 according to the embodiment, the outer region 57 had regions 57a and 57b located outside the absorbent core 30 on both sides in the lateral direction X of the presence region 54. However, the outer region 57 does not necessarily have to have both regions 57a and 57b (see Figures 3 and 4). The outer region 57 may have only one of regions 57a or 57b. In this case, similar to the diaper 1 according to the embodiment, the position of the outer region 57 of the sheet material 55 can be confirmed from the outside of the absorbent body 2 in the lateral direction X. Thus, the outer region 57 only needs to have at least one of regions 57a and 57b. That is, the outer region 57 only needs to be located outside the absorbent core 30 on at least one side in the lateral direction X.

[0083] In the diaper 1B according to the second modified example, the outer portion 61 of the guide mark 60 had portions 61a and 61b located outside the absorbent core 30 on both sides in the lateral direction X. However, the outer portion 61 does not necessarily have to have both portions 61a and 61b (see Figure 6). The outer portion 61 may have only one of portions 61a or 61b. In this case, similar to the diaper 1B according to the second modified example, the position of the outer region 57 of the sheet material 55 can be confirmed from the outside of the absorbent body 2 in the lateral direction X. Thus, the outer portion 61 of the guide mark 60 only needs to have at least one of portions 61a and 61b. That is, the outer portion 61 of the guide mark 60 only needs to be located outside the absorbent core 30 on at least one side in the lateral direction X.

[0084] Furthermore, in the diaper 1B according to the second modification, the outer portion 61 of the guide mark 60 does not necessarily have to be located outside the absorbent core 30. If the absorbent core 30 includes multiple layers, as in the absorbent core 30 of the fourth modification, the outer portion 61 only needs to be located outside in the lateral direction X of any one of the layers of the absorbent core 30, and does not necessarily have to be located outside in the lateral direction X of all the layers of the absorbent core 30. Thus, the outer portion 61 only needs to be located outside in the lateral direction X of at least one of the layers of the absorbent core 30.

[0085] In the diaper 1 according to the embodiment, the lateral fixing portion 82 was fixed to the center sheet 11 by fusion bonding, but the lateral fixing portion 82 may be bonded to the center sheet 11 by, for example, a hot melt adhesive. Also, in the diaper 1 according to the embodiment, the sheet material 55 was colored throughout, but the sheet material 55 does not have to be colored throughout. For example, the inner region 56 of the sheet material 55 does not have to be colored, and only the outer region 57 of the sheet material 55 may be colored. Also, the outer region 57 does not have to be colored throughout, and only a part of the outer region 57 may be colored. Also, the outer region 57 does not have to be colored. Even in this case, since the surface sheet 10 is relatively thin, the outline of the outer edge of the sheet material 55, including the outer region 57 that is visible through the surface sheet 10, can be seen from the skin side Z1. Therefore, the position of the outer region 57 of the sheet material 55 can be confirmed from the outline of the outer edge of the sheet material 55 that is visible through the surface sheet 10.

[0086] In the diaper 1 according to this embodiment, the ends 60c on both sides of the guide mark 60 in the lateral direction X were located inside the ends 30c on both sides of the absorbent core 30 in the lateral direction X. However, one end 60c of the guide mark 60 in the lateral direction X may be located outside the end 30c. Furthermore, one end 60c of the guide mark 60 may be located outside the lateral fixing portion 82, and may also be located outside the fold line FL of the flap portion 15.

[0087] [Package Embodiment] Figure 9 is a front view of a package 100 according to an embodiment. As shown in Figure 9, the package 100 includes a plurality of diapers 101 and a packaging body 102 that houses the plurality of diapers 101 stacked in a folded state. For example, the packaging body 102 has a substantially rectangular parallelepiped shape when it houses the plurality of diapers 101. The plurality of diapers 101 includes at least three diapers 1a, 1b, and 1c.

[0088] Multiple diapers 101 are placed inside the packaging 102 in a folded state. Each diaper 101 is folded in half by bending it in the vertical direction Y at a fold A located near the transverse center line CL1. In the example in Figure 9, the folded diapers 101 are stacked in two layers, one above the other, inside the packaging 102. In this example, the multiple diapers 101 are stacked so that the fold A of each diaper 101 faces in the same direction. In the example in Figure 9, the fold A of each diaper 101 faces downwards on the paper.

[0089] The packaging 102 has a front portion 102a that faces one end of the diaper 1 in the lateral direction X. In the example of Figure 9, the front portion 102a is positioned on the near side of the paper relative to the diaper 1. The front portion 102a is provided with a tearing guide line (not shown) including perforated through-holes for forming an opening for removing the diaper 1. The opening is formed by cutting a part of the packaging 102 along this tearing guide line. One end of the diaper 101 in the lateral direction X is visible from the opening. In this example, one end of at least three of the diapers 1a, 1b, and 1c is visible from the opening. Hereinafter, the side on which the front portion 102a is located relative to the diaper 1 in the lateral direction X will be referred to as the front side.

[0090] The multiple folded diapers 101 housed in the packaging 102 include at least a first diaper in which the lateral X end 57c of the outer region 57 reaches a first position in the absorbent body 2, and a second diaper in which the lateral X end 57c of the outer region 57 reaches a second position in the absorbent body 2 that is different from the first position.

[0091] Figure 10 is an enlarged view of diapers 1a, 1b, and 1c from Figure 9. In Figure 10, the packaging 102 is omitted. The position of the lateral X end 57c of the outer region 57 of the sheet material 55 differs between diapers 1a, 1b, and 1c. In this embodiment, diaper 1a constitutes the first diaper, and diaper 1b constitutes the second diaper.

[0092] Diaper 1a has the same configuration as diaper 1A according to the first modified example. In diaper 1a, the front end 57c in the lateral direction X of the outer region 57 reaches position 2a (first position) on the absorbent body 2. Position 2a is located outside, for example, the fold line FL which serves as the pivot point when the flap portion 15 is folded inward in the lateral direction X. More specifically, position 2a is located outside the plurality of elastic members 40 in the lateral direction X. The end 57c is visible, for example, from the non-skin side Z2 of the absorbent body 2. The lateral end 57c of the outer region 57 is visible from the front when diaper 1a is folded in half.

[0093] In diaper 1b, the front end 57c in the lateral direction X of the outer region 57 reaches a different position 2b (second position) than position 2a in the absorbent body 2. Position 2b is located inside position 2a in the lateral direction X. Also, position 2b is located outside the fold line FL. That is, position 2b is located between position 2a and the fold line FL in the lateral direction X. More specifically, position 2b is located inside the multiple elastic members 40 in the lateral direction X, and is located between the multiple elastic members 40 and the fold line FL. The appearance of the end 57c in the lateral direction X of the outer region 57 in diaper 1b is different from that of diaper 1a. Specifically, in diaper 1b, the width in the lateral direction X of the visible portion of the outer region 57 when folded in half is smaller than that of diaper 1a. The other configurations of diaper 1b are the same as those of diaper 1a.

[0094] Diaper 1c has the same configuration as diaper 1 according to the embodiment. In diaper 1c, the front end 57c of the outer region 57 in the lateral direction X reaches a different position from positions 2a and 2b on the absorbent body 2. The end 57c is located inside position 2b in the lateral direction X. The end 57c is located inside, for example, the fold line FL. It is located inside the position of the lateral fixing portion 82 of the leak-proof gather 80. In this example, the end 57c of the outer region 57 in the lateral direction X is not visible from the front when folded in half. That is, in diaper 1c, the end 57c of the outer region 57 cannot be seen from the front.

[0095] In diaper 1c, the appearance of the front edge 57c in the lateral direction X of the outer region 57 is different from that of diapers 1a and 1b. Specifically, in diaper 1c, the edge 57c is not visible from the front, whereas in diapers 1a and 1b, the edge 57c is visible from the front.

[0096] As described above, the diapers 1a, 1b, and 1c differ in the position of the lateral X-direction edge 57c of the outer region 57 of the sheet material 55. As a result, the appearance of the lateral X-direction edge 57c of the outer region 57 differs from one another. In other words, the appearance of the lateral X-direction edge 57c of the outer region 57 is not the same for diapers 1a, 1b, and 1c.

[0097] [Package Function and Effects] In package 100, both diapers 1a and 1b are folded in half, and the lateral X-edge of the outer region 57 is visible. This allows the lateral X-edge of the outer region 57 to be visible for both diapers 101 among the multiple diapers 101 contained in the packaging 102. Furthermore, the appearance of the lateral X-edge of the outer region 57 57 is not the same for all of the multiple diapers 101. In other words, the multiple diapers 101 are contained in the packaging 102 such that at least one diaper 101 has a different appearance from the others. Therefore, the user can easily check the remaining number of diapers 101 and the consumption rate by using the location of the diaper 101 with a different appearance as a guide.

[0098] Although a package according to the embodiments of this disclosure has been described above, this disclosure is not limited to the above embodiments. The materials and shapes of each component are not limited to those described above, and various materials and shapes can be used.

[0099] In the package 100 according to this embodiment, diaper 1a constitutes the first diaper and diaper 1b constitutes the second diaper, but diaper 1a may constitute the first diaper and diaper 1c may constitute the second diaper. In this case, only diaper 1a has its lateral X edge of the outer region 57 visible when folded in half. Thus, it is not necessary for the lateral X edge 57c of the outer region 57 of both the first and second diapers to be visible when folded in half; it is sufficient if at least one of the first and second diapers is visible. Similarly, diaper 1b may constitute the first diaper and diaper 1c may constitute the second diaper. Furthermore, in the package 100 according to this embodiment, it is not necessary for the entire edge 57c to be visible; it is sufficient if only a part of the edge 57c is visible. Thus, it is sufficient if at least a part of the edge 57c is visible.

[0100] 1, 1A, 1B, 1C, 1D, 101... diaper, 100... package, 102... packaging, 1a... first diaper, 1b... second diaper, 2a... first position, 2b... second position, 10... surface sheet, 11... center sheet, 12... side sheet, 13... elastic member, 15... flap part, 20... back sheet, 30, 30D... absorbent core, 30c, 57c, 6 0c...end, 57a, 57b...region, 32...second layer, 54...existing region, 55...sheet material, 57...outer region, 58...overlapping region, 59, 61a, 61b...part, 60...guide mark, 61...outer portion, 80...leak-proof gather, 82...lateral fixing part, 90...fastening tab, FL...fold line, X...horizontal direction, Y...vertical direction, Z1...skin side, Z2...non-skin side.

Claims

1. A diaper extending in a longitudinal direction connecting the ventral side to the dorsal side of a wearer, and in a transverse direction perpendicular to the longitudinal direction, comprising: an absorbent body including a surface sheet disposed on the skin side of the wearer, a back sheet disposed on the non-skin side opposite to the skin side, and an absorbent core including at least one layer disposed between the surface sheet and the back sheet; and a pair of fastening tabs extending outward in the transverse direction from the absorbent body, wherein the absorbent body has guide marks formed so as to be visible from the skin side for guiding the position where the wearer's buttocks should be placed, the guide marks are formed on a sheet material disposed between the surface sheet and the absorbent core, and the sheet material has an outer region located outside the at least one layer of the absorbent core on at least one side in the transverse direction in the presence region where the guide marks are located in the longitudinal direction.

2. The diaper according to claim 1, wherein the outer region has regions located on both sides in the lateral direction of the presence region that are located outside the at least one layer of the absorbent core.

3. The diaper according to claim 1, wherein the surface sheet comprises a center sheet covering the absorbent core and a pair of side sheets covering both lateral sides of the center sheet, the side sheets include leak-proof gathers configured to stand upright by an elastic member that contracts in the longitudinal direction, the leak-proof gathers include lateral fixing portions that serve as fulcrums for the standing of the leak-proof gathers, and the outer region extends beyond the lateral fixing portions.

4. The diaper according to claim 3, wherein the lateral fixing portion of the leak-proof gather is fixed to the center sheet by fusion.

5. The diaper according to claim 1, wherein at least a portion of the outer region is colored.

6. The diaper according to claim 1, wherein the guide mark has an outer portion located outside the at least one layer of the absorbent core on at least one side in the lateral direction.

7. The diaper according to claim 6, wherein the outer portion has portions on both sides in the lateral direction that are located outside the at least one layer of the absorbent core.

8. The diaper according to claim 1, wherein the absorbent body has a pair of flap portions that extend outward from the absorbent body in the lateral direction, and a fold line is formed at the inner end of the flap portion in the lateral direction, which serves as a pivot point when the flap portion is folded inward in the lateral direction, and the outer region extends beyond the fold line.

9. The diaper according to claim 1, wherein the outer region includes an overlapping region formed by the overlapping of multiple distinct parts contained in the sheet material.

10. The diaper according to claim 1, wherein the lateral ends of the guide mark are located inward from the lateral ends of the absorbent core.

11. A package comprising a plurality of diapers as described in claim 1, and a packaging body for stacking the plurality of diapers in a folded state, wherein the plurality of diapers in a folded state contained in the packaging body include at least a first diaper whose lateral edge of the outer region reaches a first position in the absorbent body, and a second diaper whose lateral edge of the outer region reaches a second position different from the first position in the absorbent body, wherein at least a portion of the lateral edge of the outer region of at least one of the first diaper and the second diaper is visible when folded.

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