Absorbent article storage body and absorbent article

Abstract

In an absorbent article storage body according to the present invention, a plurality of absorbent articles are stored as a layered absorbent article group. The absorbent articles have an absorbent core and a skin-side core wrap part adjacent to the skin-side surface of the absorbent core. The skin-side core wrap part is composed of a base material layer and a fiber layer. The fiber layer is provided with 18 gsm or greater of thermoplastic resin fibers. The length of the absorbent article group in a prescribed direction in the absorbent article storage body that is unopened is 70% or less of the length of the absorbent article group in the prescribed direction after the elapse of 96 hours since the absorbent article storage body is opened and the absorbent article group is taken out. Moreover, the absorption speed in an absorption speed test for the absorbent articles after the elapse of 5 minutes since the absorbent article storage body is opened and the absorbent articles are taken out is 85% or greater of the absorption speed in the absorption speed test after the elapse of 96 hours since the absorbent article storage body is opened and the absorbent articles are taken out.

Description

Absorbent article container and absorbent article

[0001] The present invention relates to an absorbent article container and an absorbent article.

[0002] Generally, absorbent articles such as disposable diapers are distributed and sold in the form of a package (absorbent article container) in which the absorbent articles are contained in a container such as a plastic bag, as in Patent Document 1. These packages are usually distributed by transportation means such as trucks, but as the volume of transportation increases, the amount of exhaust gases such as carbon dioxide increases, which places a burden on the environment, so it is desirable to make the packages more compact (downsized). For example, it is known to compress the absorbent articles as in the package described in Patent Document 1 in order to make the packages more compact.

[0003] Special Publication No. 2013-505796

[0004] However, while the more the absorbent article is compressed, the more compact the package, the more the absorbent core becomes crushed and deformed, which may reduce the absorbent article's ability to absorb bodily exudates.

[0005] The present invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to provide an absorbent article container that easily achieves both compactness of the absorbent article container and maintaining the absorbency of the absorbent article.

[0006] The main invention for achieving the above object is an absorbent article container having a plurality of absorbent articles and a container for storing the plurality of absorbent articles, wherein the plurality of absorbent articles are stored in the container as a group of absorbent articles stacked in a predetermined direction, the absorbent articles have an absorbent core including at least a liquid-absorbent fiber and a superabsorbent polymer, and a skin-side core wrap portion provided adjacent to the skin-side surface of the absorbent core, the skin-side core wrap portion being composed of a base material layer and a fiber layer, the fiber layer having a thermoplastic resin fiber of 18 gsm or more, and the unopened The absorbent article container is characterized in that the length in the predetermined direction of the group of absorbent articles in the absorbent article container is 70% or less of the length in the predetermined direction of the group of absorbent articles 96 hours after the absorbent article container is opened and the group of absorbent articles is taken out, and the absorption rate in an absorption rate test of the absorbent articles 5 minutes after the absorbent article container is opened and the absorbent articles are taken out is 85% or more of the absorption rate in an absorption rate test of the absorbent articles 96 hours after the absorbent article container is opened and the absorbent articles are taken out. Other features of the present invention will become apparent from the description in this specification and the accompanying drawings.

[0007] According to the present invention, it becomes easier to achieve both compactness of the absorbent article container and maintenance of the absorbency of the absorbent articles.

[0008] 3 is a perspective view of the container 100. FIG. 4 is a schematic perspective view of the diaper 1. FIG. 5 is a plan view of the diaper 1 in an unfolded and stretched state. FIG. 6 is a schematic cross-sectional view taken along line A-A in FIG. 3. FIG. 5A is a plan view of the absorbent main body 10, and FIG. 5B is a schematic cross-sectional view of the absorbent main body 10. FIG. 7A is a front view of a group of diapers R in a contained state. FIG. 7B is a front view of a group of diapers R in a recovered state. FIG. 8A is an enlarged schematic view of the absorbent body 11 in a compressed state. FIG. 8B is an enlarged schematic view of the absorbent body 11 in a recovered state. FIG. 8B is a diagram showing the results of an absorption rate test. FIG. 9 is a plan view of the absorbent main body 10 when the absorbent body 11 is provided with compressed portions e.

[0009] The present specification and the accompanying drawings make clear at least the following: (Aspect 1) An absorbent article container having a plurality of absorbent articles and a container for accommodating the plurality of absorbent articles, wherein the plurality of absorbent articles are accommodated in the container as a group of absorbent articles stacked in a predetermined direction, the absorbent articles have an absorbent core including at least a liquid-absorbent fiber and a superabsorbent polymer, and a skin-side core wrap portion provided adjacent to the skin-side surface of the absorbent core, the skin-side core wrap portion being composed of a base material layer and a fiber layer, the fiber layer having a thermoplastic resin fiber of 18 gsm or more, and an unopened absorbent article container The absorbent article container is characterized in that the length of the group of absorbent articles in the specified direction is 70% or less of the length of the group of absorbent articles in the specified direction 96 hours after the absorbent article container is opened and the absorbent article group is removed, and the absorption rate of the absorbent articles in an absorption rate test 5 minutes after the absorbent article container is opened and the absorbent articles are removed is 85% or more of the absorption rate of the absorbent articles in an absorption rate test 96 hours after the absorbent article container is opened and the absorbent articles are removed.

[0010] It is desirable to make absorbent article containers more compact in order to reduce the amount of packaging material used and logistics costs. However, the more compact the absorbent article container, the more likely it is that the absorbent articles will be crushed or the absorbent core will deform, making it difficult to achieve the desired absorption function. According to the absorbent article container of Aspect 1, even when absorbent articles are stacked and compressed, the skin-side core wrap portion of the absorbent articles is composed of a fiber layer and a base layer having a thermoplastic resin fiber content of 18 gsm or more. This makes the fiber layer more easily compressible than when the fiber layer of the skin-side core wrap portion has a thermoplastic resin fiber content of less than 18 gsm, thereby reducing the risk of the absorbent core being crushed. Furthermore, by making the length in a predetermined direction of the absorbent article group in an unopened absorbent article container 70% or less of the horizontal length of the absorbent article group 96 hours after the absorbent article group is removed, the absorbent article container in a packaged state can be made more compact than when the length in a predetermined direction of the absorbent article group in an unopened absorbent article container is longer than 70% of the horizontal length of the absorbent article group 96 hours after the absorbent article group is removed.However, even when an absorbent article is taken out of the compact absorbent article container and worn, the absorbent article can have an absorption speed that is 85% or more of the absorption speed of the absorbent article in a state where the compression has been relaxed 96 hours after the absorbent article is removed from the absorbent article container, making it easier to achieve both the compactness of the absorbent article container and the maintenance of the absorbency of the absorbent articles.

[0011] (Aspect 2) The absorbent article container according to aspect 1, wherein the fiber layer is provided closer to the absorbent core than the base material layer.

[0012] According to the absorbent article container of aspect 2, when the absorbent article is removed from the absorbent article container, the compression of the fiber layer is released, widening the spacing between the fibers. Therefore, when the absorbent article is worn, capillary action makes it easier for excrement to move to the absorbent core adjacent to the fiber layer, making it easier to keep the excrement away from the wearer's skin.

[0013] (Aspect 3) The absorbent article container according to aspect 1 or 2, wherein the thermoplastic resin fibers of the fiber layer have a portion where they are entangled with the liquid-absorbent fibers of the absorbent core.

[0014] According to the absorbent article container of aspect 3, since the fiber layer is more likely to deform than the absorbent core, deformation of the absorbent core can be reduced when the absorbent article is worn after being removed from the absorbent article container. Also, when worn, bodily waste is more likely to be transferred from the fiber layer to the absorbent core, which helps to keep the bodily waste away from the wearer's skin.

[0015] (Aspect 4) The absorbent article is an absorbent article container described in Aspect 2 or 3, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, an adhesive is used to secure the skin-side sheet to the base material layer, an adhesive is used to secure the base material layer to the fiber layer, and the basis weight of the adhesive between the base material layer and the fiber layer is lower than the basis weight of the adhesive between the skin-side sheet and the base material layer.

[0016] According to the absorbent article container of aspect 4, when worn, it is easier to move excrement from the base layer to the fiber layer than when the basis weight of the adhesive between the skin-side sheet and the base layer is lower than the basis weight of the adhesive between the base layer and the fiber layer, making it easier to keep excrement away from the wearer's skin.

[0017] (Aspect 5) In the absorbent article container according to any one of Aspects 1 to 4, the base material layer includes fibers having hydrophilic properties.

[0018] According to the absorbent article container of aspect 5, when the absorbent article is worn, excrement absorbed from the skin side of the absorbent article is transferred from the skin side sheet to the base material layer, which helps to reduce the risk of excrement once absorbed by the base material layer returning to the skin side sheet side, thereby making it easier to keep excrement away from the wearer's skin.

[0019] (Aspect 6) The absorbent article is an absorbent article container according to any one of Aspects 1 to 4, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the base material layer is a tissue formed of hydrophilic fibers.

[0020] According to the absorbent article container of aspect 6, when the absorbent article is worn, excrement absorbed from the skin side of the absorbent article is transferred from the skin side sheet to the base material layer, which helps to reduce the risk of excrement once absorbed by the base material layer returning to the skin side sheet side, thereby making it easier to keep excrement away from the wearer's skin.

[0021] (Aspect 7) The absorbent article is an absorbent article container according to any one of Aspects 1 to 5, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the base material layer is a spunbond / meltblown / spunbond nonwoven fabric formed of hydrophilic fibers.

[0022] According to the absorbent article container of aspect 7, when the absorbent article is worn, excrement absorbed from the skin side of the absorbent article is moved from the skin-side sheet to the base material layer, and the movement of excrement from the base material layer to the absorbent core is facilitated, thereby making it easier to keep excrement away from the wearer's skin.

[0023] (Aspect 8) The absorbent article container according to any one of Aspects 1 to 6, wherein the thermoplastic resin fibers of the fiber layer have a basis weight higher than the fiber basis weight of the base material layer.

[0024] According to the absorbent article container of aspect 8, it is easier to recover a fiber layer that has been compressed in the absorbent article container than when the basis weight of the thermoplastic resin fiber in the fiber layer is lower than the basis weight of the fiber in the base material layer.

[0025] (Aspect 9) The absorbent article is an absorbent article container described in any one of Aspects 1 to 7, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the basis weight of the thermoplastic resin fiber in the fiber layer is higher than the basis weight of the fiber in the top sheet.

[0026] According to the absorbent article container of aspect 9, the fiber layer in the absorbent article container state is more easily able to recover from a compressed state than when the basis weight of the thermoplastic resin fiber in the fiber layer is lower than the basis weight of the fiber in the surface sheet, while also making it easier to move excrement from the skin-side sheet to the fiber layer, making it easier to keep excrement away from the wearer's skin.

[0027] (Aspect 10) The absorbent article is an absorbent article container according to any one of Aspects 1 to 8, characterized in that the absorbent article has an outer sheet closest to the skin, and the basis weight of the thermoplastic resin fiber of the fiber layer is higher than the basis weight of the fiber of the outer sheet.

[0028] According to the absorbent article container of aspect 10, it is easier to recover the fiber layer that has been compressed in the absorbent article container than when the basis weight of the thermoplastic resin fiber of the fiber layer is lower than the basis weight of the fiber of the outer sheet.

[0029] (Aspect 11) The absorbent article is an absorbent article container described in any one of Aspects 1 to 9, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the average thickness of the thermoplastic resin fibers in the fiber layer is thicker than the average thickness of the fibers in the skin-side sheet.

[0030] According to the absorbent article container of aspect 11, it is easier to recover the fiber layer of the absorbent article container from a compressed state than when the maximum thickness of the thermoplastic resin fibers of the fiber layer is thinner than the maximum thickness of the fibers of the skin-side sheet.

[0031] (Aspect 12) The absorbent article is an absorbent article container according to any one of Aspects 1 to 10, characterized in that the absorbent article has a non-skin side core wrap portion provided adjacent to the non-skin side of the absorbent core, and the non-skin side core wrap portion is composed of the base material layer and the fiber layer.

[0032] According to the absorbent article container of aspect 12, even when absorbent articles are stacked and compressed, the fiber layer of the skin-side core wrap portion of the absorbent article and the fiber layer of the non-skin-side core wrap portion are easily compressed, thereby further reducing the risk of the absorbent core being crushed.

[0033] (Aspect 13) In the absorbent article container according to aspect 11, the fiber layer of the non-skin-side core wrap portion is provided closer to the absorbent core than the base material layer.

[0034] According to the absorbent article container of aspect 13, even when the absorbent articles are stacked and compressed, the fiber layer of the skin-side core wrap portion of the absorbent article and the fiber layer of the non-skin-side core wrap portion are easily compressed, thereby further reducing the risk of the absorbent core being crushed.

[0035] (Aspect 14) The absorbent article is an absorbent article container according to any one of Aspects 1 to 12, characterized in that the absorbent article has a compressed portion in which at least the absorbent core and the skin-side core wrap portion are compressed at a position where the absorbent core and the skin-side core wrap portion overlap when viewed from the skin side.

[0036] According to the absorbent article container of aspect 14, the compressed portion is a portion where the fiber density is increased, so that excrement is more easily drawn into the compressed portion by capillary action, and when the absorbent article is worn, the risk of the fiber layer of the skin-side core wrap portion absorbing excrement and swelling locally can be reduced.

[0037] (Aspect 15) The absorbent article is an absorbent article container described in any one of Aspects 1 to 13, characterized in that, when viewed from the skin side, the absorbent article has a non-compressed portion where the absorbent core and the skin-side core wrap portion overlap, and where the absorbent core and the skin-side core wrap portion are not compressed, and in the thickness direction of the absorbent article, the center of the length from the skin side of the skin-side core wrap portion to the non-skin side of the absorbent core in the compressed portion is located closer to the skin side than the center of the length from the skin side of the skin-side core wrap portion to the non-skin side of the absorbent core in the non-compressed portion.

[0038] According to the absorbent article container of aspect 15, by making the density of the liquid-absorbent fibers of the absorbent core higher than the density of the fibers of the fiber layer in the compression section, it becomes easier to move excrement from the fiber layer toward the absorbent core by capillary action, making it easier to move the excrement away from the wearer's skin, while reducing the risk of excrement remaining in the compression section and reducing the risk of the excrement being absorbed slowly.

[0039] (Aspect 16) The absorbent article is an absorbent article container described in Aspect 13 or 14, characterized in that, when viewed from the skin side, the absorbent article has a low-density portion at the position where the absorbent core and the skin-side core wrap portion overlap, in which the density of the liquid-absorbent fibers of the absorbent core is lower than that of the compressed portion and the density of the fibers of the fiber layer is lower, and in the longitudinal direction or left-right direction of the absorbent article, the compressed portion has a portion adjacent to the low-density portion.

[0040] According to the absorbent article container of aspect 16, when the absorbent article is worn, the compressed section with a high fiber density makes it easier to absorb liquid through capillary action, making it easier to move excreted waste from the wearer's skin toward the absorbent core, while the waste absorbed in the compressed section is moved to the adjacent low-density section in the longitudinal or left-right direction, thereby reducing the decrease in absorption capacity in the compressed section and making it easier to move waste away from the wearer's skin.

[0041] (Aspect 17) An absorbent article container described in any one of aspects 1 to 15, characterized in that the value obtained by dividing the thickness of the fiber layer 96 hours after the absorbent article container is opened and the absorbent article is removed by the thickness of the fiber layer when the absorbent article container is opened and the absorbent article is removed is less than or equal to the value obtained by dividing the thickness of the absorbent core 96 hours after the absorbent article container is opened and the absorbent article is removed by the thickness of the absorbent core when the absorbent article container is opened and the absorbent article is removed.

[0042] According to the absorbent article container of aspect 17, the fiber layer is more easily compressed and recovers than the absorbent core, which makes it possible to make the absorbent article container compact while reducing the risk of the absorbent core being excessively crushed, thereby reducing the risk of the absorbency of the absorbent article being reduced.

[0043] (Aspect 18) The absorbent article container according to any one of aspects 1 to 16, wherein the fiber layer is made of fibers containing PET fibers.

[0044] According to the absorbent article container of aspect 18, since the PET fiber has a high rigidity property, the thickness of the fiber layer is more likely to recover after being released from compression than when the PET fiber is not contained.

[0045] (Aspect 19) The absorbent article container according to any one of aspects 1 to 17, wherein at least a portion of the fibers of the fiber layer have a hydrophilic function.

[0046] According to the absorbent article container of aspect 19, the fiber layer having hydrophilic fibers makes it easier to absorb excrement, making it easier to keep the excrement away from the wearer's skin, and making it less likely for the excrement to remain on the surface of the absorbent article.

[0047] (Aspect 20) An absorbent article having an absorbent core including at least a liquid-absorbent fiber and a superabsorbent polymer, and a skin-side core wrap portion provided adjacent to the skin-side surface of the absorbent core, wherein the skin-side core wrap portion is composed of a base material layer and a fiber layer, the thermoplastic resin fiber of the fiber layer has a basis weight higher than the fiber of the base material layer, and the fiber layer is provided closer to the absorbent core than the base material layer.

[0048] According to the absorbent article of aspect 20, even when force is applied in the thickness direction of the absorbent article, the fiber layer of the skin-side core wrap portion of the absorbent article is more easily compressed than the absorbent core, thereby reducing the risk of the absorbency of the absorbent article being reduced due to deformation of the absorbent core.

[0049] ===Present Embodiment=== <<Basic Configuration of Container 100>> Below, as an example of an absorbent article container according to this embodiment, a container 100 (also referred to as "container 100") for pants-type disposable diapers for adults 1 will be described. However, the disposable diaper according to this embodiment is not limited to the above, and may be pants-type disposable diapers for infants, tape-type disposable diapers for infants or adults, sanitary shorts, sanitary napkins, light incontinence pads, absorbent pads, disposable diapers or absorbent sheets for animals, etc.

[0050] FIG. 1 is a perspective view of a container 100. The container 100 includes a plurality of pants-type disposable diapers 1 (hereinafter simply referred to as "diapers 1") and a container 120 that contains the plurality of diapers 1 (see FIG. 2, etc.). The diapers 1 are distributed and stored in the container 100 contained in the container 120. As shown in FIG. 1, in this embodiment, the container 100, in a state in which a plurality of diapers 1 are contained in the container 120 (hereinafter also referred to as the "contained state"), is a substantially hexahedron having a plurality of surfaces 200 (a front surface 200A, a side surface 200B, a rear surface (not shown), a top surface 200D, and a bottom surface (not shown)). However, the shape is not limited to this and may be another polyhedron, etc.

[0051] <Basic Structure of Diaper 1> Fig. 2 is a schematic perspective view of the diaper 1. Fig. 3 is a plan view of the diaper 1 in an unfolded and stretched state. Fig. 4 is a schematic cross-sectional view taken along line A-A in Fig. 3. The "unfolded state" of the diaper 1 refers to a state in which the pair of side seam regions 50, 50 provided on both sides of the diaper 1 are separated, and the diaper 1 is opened and stretched out in a plane. The "stretched state" of the diaper 1 refers to a state in which the entire diaper 1 (the entire product) is stretched without wrinkles, specifically, a state in which the dimensions of each component constituting the diaper 1 (e.g., the absorbent main body 10 and waistband member 20, which will be described later) are stretched to the same dimensions as or close to the dimensions of the individual components.

[0052] In the pants-type state shown in FIG. 2 , the diaper 1 has a vertical direction, a horizontal direction, and a front-to-back direction, which intersect with one another, and has a waist opening BH and a pair of leg openings LH, LH. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. The front side in the front-to-back direction corresponds to the wearer's abdominal side, and the rear side corresponds to the wearer's back side. In the unfolded state shown in FIG. 3 , the diaper 1 has a vertical direction and a horizontal direction, which intersect with one another. The vertical direction is the vertical direction in FIG. 2 and corresponds to the longitudinal direction of the absorbent main body 10. The horizontal direction is the horizontal direction in FIG. 2 . As shown in FIG. 4 , the thickness direction is the direction in which the materials constituting the diaper 1 are layered. In the thickness direction, the side that contacts the wearer's skin is referred to as the skin side, and the opposite side is referred to as the non-skin side. The front-to-back direction in the pants-type state is the thickness direction of the waist member 20. The center line CC shown in FIG. 2 indicates the center of the diaper 1 in the horizontal direction, and the center CL indicates the center of the diaper 1 in the vertical direction.

[0053] The diaper 1 comprises a liquid-absorbent main body 10 and a waistband member 20 disposed on the non-skin side of the absorbent main body 10. The waistband member 20 comprises a front waistband portion 30 that covers the wearer's abdominal region and a rear waistband portion 40 that covers the wearer's dorsal region. The diaper 1 is a so-called three-piece pants-type diaper.

[0054] In the unfolded state shown in Fig. 3, the front waistline section 30 and the rear waistline section 40 are aligned parallel to each other with a gap between them in the vertical direction, with the absorbent main body 10 spanning between them, and each end 10ea, 10eb in the longitudinal direction (vertical direction) of the absorbent main body 10 being joined and fixed to the skin side of the nearest waistline section 30, 40, resulting in a generally H-shaped appearance in a plan view. From this state, the absorbent main body 10 is folded in half with the vertical center position CL as the folding position (fold line), and the opposing side portions 30sw on both lateral sides of the front waistline section 30 and the opposing side portions 40sw on both lateral sides of the rear waistline section 40 are joined and connected to each other to form a pair of side joining portions 50, 50. The side joining portions 50 are formed by known joining means such as welding or adhesive. As a result, the front waist portion 30 and the rear waist portion 40 are formed into an annular shape, resulting in a pants-type diaper 1 having a waist opening BH and a pair of leg openings LH, LH as shown in Figure 2.

[0055] (Absorbent main body 10) Fig. 5A is a plan view of the absorbent main body 10, and Fig. 5B is a schematic cross-sectional view of the absorbent main body 10. The absorbent main body 10 has an absorbent body 11 that absorbs excrement, a top sheet (skin-side sheet) 12 arranged on the skin side of the absorbent body 11 in the thickness direction, a back sheet 13 arranged on the non-skin side of the absorbent body 11, and an exterior sheet 14. However, the absorbent main body 10 may also include sheet members other than those mentioned above. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorbent body 11 in the thickness direction.

[0056] The absorbent body 11 has an absorbent core 11a and a core wrap sheet 11b. The absorbent core 11a is a member that absorbs and retains excreted liquids such as urine. The core wrap sheet 11b is a sheet member that covers the outer peripheral surface of the absorbent core 11a.

[0057] The absorbent core 11a of this embodiment comprises liquid-absorbent fibers af such as pulp fibers and a superabsorbent polymer (SAP) as (see FIG. 7). The absorbent core 11a has a constricted portion 11c between its longitudinal front and rear ends, which narrows the width in the left-right direction, and has a generally hourglass shape in plan view as shown in FIG. 5A. This constricted portion 11c is the portion that is sandwiched between the wearer's legs when the diaper 1 is worn, and the presence of the constricted portion 11c allows the absorbent core 11a to fit easily between the wearer's legs. However, the shape of the absorbent core 11a is not limited to this.

[0058] As shown in Figure 5B, the core wrap sheet 11b of the absorbent body 11 of this embodiment includes a skin-side core wrap portion 11ba and a non-skin-side core wrap portion 11bb. The skin-side core wrap portion 11ba is a sheet provided adjacent to the skin-side surface of the absorbent core 11a, covering substantially the entire skin-side surface of the absorbent core 11a from the skin side. The non-skin-side core wrap portion 11bb is a sheet provided adjacent to the non-skin-side surface of the absorbent core, covering substantially the entire non-skin-side surface of the absorbent core 11a from the skin side, with both left and right sides folded back toward the skin side to wrap around the absorbent core 11a. The skin-side core wrap portion 11ba will be described later. Examples of the non-skin-side core wrap portion 11bb include liquid-permeable sheet members such as tissue paper and nonwoven fabric.

[0059] The top sheet 12 is a liquid-permeable sheet, and may be, for example, a hydrophilic air-through nonwoven fabric or a spunbond nonwoven fabric. In this embodiment, as shown in Figure 5B, it covers substantially the entire skin-side surface of the absorbent body 11. In this embodiment, the top sheet 12 is provided only on the skin-side surface of the absorbent body 11, but this is not limited to this. For example, both left and right side portions of the top sheet 12 may be folded back to the non-skin side so as to encase the absorbent body 11.

[0060] The back sheet 13 is a liquid-impermeable sheet, and is made of, for example, a resin film, etc. The back sheet 13 is provided on the non-skin side of the absorbent body 11.

[0061] The exterior sheet 14 is the member provided on the side closest to the skin of the absorbent main body 10, and in this embodiment, constitutes the leakage prevention wall portion 15 at the lateral end of the absorbent main body 10. As the exterior sheet 14, for example, a flexible hydrophobic nonwoven fabric is used.

[0062] A pair of leakage preventing walls 15 is provided on both left-right side portions of the absorbent body 10 along the vertical direction (the longitudinal direction of the absorbent body 10). Specifically, the pair of leakage preventing walls 15 is formed by partially extending outward beyond both ends of the absorber 11 in the left-right direction (horizontal direction) and folding the outer sheet 14 toward the skin at multiple locations as shown in Fig. 5B. A leakage preventing wall elastic member 16 such as rubber thread is attached to the skin-side end (tip) of the leakage preventing wall 15 in a stretched state along the vertical direction. When the diaper 1 is worn, the leakage preventing wall 15 stands up against the skin of the wearer due to the stretchability of the leakage preventing wall elastic member 16, and fits snugly against the crotch area of ​​the wearer.

[0063] Furthermore, leg elastic members 17 such as rubber threads are attached to both left and right sides of the absorbent body 10 in a stretched state along the vertical direction (the longitudinal direction of the absorbent body 10). When the diaper 1 is worn, the stretchability of the leg elastic members 17 causes both sides of the absorbent body 10 to contract, making it easier to fit around the wearer's legs.

[0064] (Front waistline portion 30) As shown in Figure 4, the front waistline portion 30 has a skin-side sheet 31 arranged closest to the skin in the thickness direction, a non-skin-side sheet 32 ​​provided on the non-skin-side of the skin-side sheet 31, and a waistline elastic member 35 provided between the skin-side sheet 31 and the non-skin-side sheet 32.

[0065] The skin side sheet 31 and the non-skin side sheet 32 ​​are sheet members having a rectangular shape in a plan view as shown in Fig. 3, and are each made of, for example, an SMS nonwoven fabric. To improve the breathability of the front waistband portion 30, at least one of the skin side sheet 31 and the non-skin side sheet 32 ​​may have through holes (not shown) that penetrate through the sheet in the thickness direction.

[0066] The front waistline portion 30 of this embodiment has a folded-back portion 32f, where the upper end (front end in the longitudinal direction) of the non-skin side sheet 32 ​​is folded back from the non-skin side to the skin side and from the front side to the back side in the longitudinal direction. The folded-back portion 32f covers a portion (upper end) of the skin side sheet 31, thereby preventing the upper edge of the skin side sheet 31 from digging into the wearer's skin. However, the folded-back portion 32f is not necessarily provided.

[0067] The front waistband portion 30 basically has a two-layer structure consisting of a skin-side sheet 31 and a non-skin-side sheet 32, but may have a three-layer or more structure in part or throughout the entire area, such as a skin-side sheet 36 (see FIG. 4, etc.). The skin-side sheet 36 is a sheet member arranged to cover the upper end (front end in the longitudinal direction) of the absorbent main body 10 from the skin side, and functions as a cover sheet. This prevents the upper edge of the absorbent main body 10 from digging into the wearer's skin when the diaper 1 is worn. The skin-side sheet 36 is formed, for example, from an SMS nonwoven fabric.

[0068] The waist elastic members 35 are arranged in a line in the vertical direction and are attached in a stretched state in the horizontal direction between the skin side sheet 31 and the non-skin side sheet 32. The stretchability of the waist elastic members 35 allows the front waist portion 30 to fit the abdominal waist of the wearer.

[0069] The waist elastic members 35 can be attached using an adhesive such as a hot melt adhesive. For example, the waist elastic members 35 can be attached by applying a hot melt adhesive to the waist elastic members 35, stretching them at a predetermined stretch ratio, and sandwiching them between the skin side sheet 31 and the non-skin side sheet 32. Note that the means for attaching the waist elastic members 35 to the front waist portion 30 is not limited to adhesive, and they may also be welded.

[0070] (Rear waistline portion 40) The rear waistline portion 40 has a skin-side sheet 41 arranged closest to the skin in the thickness direction, a non-skin-side sheet 42 laminated adjacent to the non-skin-side of the skin-side sheet 41, and waistline elastic members 45 provided between the skin-side sheet 41 and the non-skin-side sheet 42. Similar to the front waistline portion 30, the rear waistline portion 40 may also have folded-back portions 42f, a skin-facing sheet 46, etc. (see FIGS. 3 and 4). It may also have through-holes (not shown) that penetrate in the thickness direction. The configuration of each component is substantially the same as that of the front waistline portion 30, and therefore description thereof will be omitted.

[0071] On the other hand, the external shape of the rear waistline portion 40 differs from that of the front waistline portion 30. Specifically, as shown in FIG. 3 , the rear waistline portion 40 has a buttocks cover 40b that is generally trapezoidal below the side joint portion 50 (side portion 40sw). The buttocks cover 40b narrows in width from top to bottom in the vertical direction, and its outer edge is curved. The provision of the buttocks cover 40b enables the rear waistline portion 40 to widely cover the wearer's buttocks when the diaper 1 is worn. However, the buttocks cover 40b is not necessarily provided.

[0072] The buttocks cover 40b is provided with a curved elastic member 47 such as rubber thread as shown in Fig. 3. The curved elastic member 47 is attached between the skin-side sheet 41 and the non-skin-side sheet 42 in a stretched state along the edge of the buttocks cover 40b. The stretchability of the curved elastic member 47 allows the buttocks cover 40b of the rear waistband portion 40 to fit easily around the wearer's buttocks when the diaper 1 is worn, and also makes it less likely to roll up from the buttocks.

[0073] <<Storage Material 120>> The storage material 120 is formed of a resin (plastic) film, specifically, a resin film made of polyethylene (PE). Note that the material constituting the storage material 120 is not limited to this, and the storage material 120 may be formed of a film-like material such as a synthetic resin film made of ethylene-vinyl alcohol copolymer (EVOH), polypropylene (PP), or polyethylene terephthalate (PET).

[0074] The container 120 has a handle region 121 above the top surface 200D. The handle region 121 is formed by extending the material (surface) of the container 120. Specifically, the extended portions of both side surfaces 200B are bonded together to form the top surface 200D, and the extended portions of the front surface 200A and the back surface are bonded together to form the handle region 121. A handle portion 122 for inserting a hand is provided at the upper end of the handle region 121. This handle portion 122 is a through-hole provided in the handle region 121. The handle portion 122 makes it easier for a wearer or a person putting the diaper 1 on a wearer (hereinafter also referred to as the "wearer, etc.") to carry the container 100.

[0075] The containment material 120 of this embodiment has perforations P as opening means for forming an opening. The perforations P provided in the containment material 120 of this embodiment are provided on the upper surface 200D of the container 100. The perforations P are through-holes that penetrate the containment material 120 in the thickness direction and are arranged linearly and intermittently along the left-right direction. Since the containment material 120 has perforations P, a wearer can easily form an opening by cutting the containment material 120 at the perforations P, and therefore, can easily remove the diaper 1 from inside the containment material 120 through the opening.

[0076] <<Container 100 in a Stored State>> Figure 6 is a view of the container 100 as seen from the front. As shown in Figure 1 and other figures, the container 100 in a stored state has an up-down direction, a left-right direction, and a front-to-back direction. With regard to the up-down direction of the container 100, if the container 100 (container 120) has a handle portion 122, the side on which the handle portion 122 is provided is considered the upper side, and the opposite side is considered the lower side, and the up-down direction is determined accordingly. Alternatively, if the handle portion 122 is not provided, the surface 200 of the container 100 (container 120) on which the product name is written in the largest size may be considered the front surface 200A, and the up-down direction may be determined based on the direction of the letters of the product name on the front surface 200A.

[0077] In the container 100, a plurality of diapers 1 are stored as a diaper group R, stacked in a predetermined direction. Specifically, the stored diapers 1 are in a pants-type state ( FIG. 2 ) and arranged adjacent to each other in the front-to-back direction (thickness direction) of the diapers 1. The stored diapers 1 are stored inside the container 120 with their folding positions (fold lines) downward, and the plurality of diapers 1 (diaper group R) are stacked in the predetermined direction (front-to-back direction) of the diapers 1. In this embodiment, as shown in FIG. 1 and other figures, the front-to-back direction (predetermined direction) of the diapers 1 is aligned with the left-to-right direction of the container 100. As shown in FIGS. 1 and 6 , one diaper group R is stored in the container 100 of this embodiment, and the diaper group R is a plurality (20 pieces) of diapers 1 stacked in the left-to-right direction of the container 100 (front-to-back direction of the diapers 1).

[0078] The diaper group R may refer to all of the diapers 1 stacked in the stacking direction of the diapers 1 within the container 100, or may refer to a portion (a plurality) of the diapers 1 stacked in the stacking direction of the diapers 1 within the container 100. In the container 100 of this embodiment, 20 diapers 1 are stacked along the left-right direction of the container 100, and these 20 diapers 1 will be collectively referred to as the "diaper group R." However, for example, of the 20 diapers 1 stacked in the stacking direction (the left-right direction of the container 100), four diapers 1 adjacent to each other in the left-right direction of the container 100 may also be referred to as the "diaper group R." Furthermore, multiple diaper groups R may be arranged in a direction (the up-down direction or the front-to-back direction of the container 100) perpendicular to the stacking direction (the left-to-right direction of the container 100). For example, the container may have multiple diaper groups, with an "upper diaper group" (not shown) of 10 diapers 1 stacked on the top side along the left-right direction of the container, and a "lower diaper group" (not shown) of 10 diapers 1 stacked on the bottom side along the left-right direction of the container.

[0079] In the present embodiment, all of the diapers 1 in the diaper group R are arranged such that the front-to-rear direction of the diapers 1 is aligned with the left-to-right direction of the container 100 and the folding position (the double fold line) is downward, but this is not limiting. For example, all of the diapers 1 in the diaper group R may be arranged such that the front-to-rear direction of the diapers 1 is aligned with the front-to-rear direction of the container 100, or some of the diapers 1 in the diaper group R may be arranged such that the front-to-rear direction of the diapers 1 is aligned with the front-to-rear direction of the container 100 and the other diapers 1 are aligned with the left-to-right direction of the container 100. Furthermore, all of the diapers 1 in the diaper group R may be arranged such that the folding position is upward, or some of the diapers 1 in the diaper group R may be arranged such that the folding position is upward and the folding position is downward.

[0080] <<Regarding Diaper 1 in Storage State and Recovery State>> Generally, absorbent articles such as disposable diapers are distributed and sold in the form of an absorbent article container (see FIG. 1 ) in which the absorbent article container is contained in a container material. This absorbent article container is usually distributed by transportation means such as trucks, but the larger the container, the greater the transportation volume, which increases the amount of exhaust gases such as carbon dioxide emitted and places a burden on the environment. Furthermore, the larger the container, the greater the transportation volume, which increases transportation costs, and requires a large display space at the time of sale. Therefore, it is desirable to make the absorbent article container more compact (smaller).

[0081] A known method for compacting (reducing the size of) an absorbent article container is to compress the absorbent article to store it. Typically, in absorbent articles such as disposable diapers, the absorbent core (absorbent body) is thick and highly rigid. The more the absorbent article is compressed in a predetermined direction to compact the absorbent article container, the more easily the absorbent core is crushed and deformed. As a result, even if the absorbent article container is made compact, there is a problem that when the absorbent article is removed from the absorbent article container and worn, the crushing and deformation of the absorbent core can reduce the absorbency of body exudates or cause body exudates to leak.

[0082] In the container 100 of this embodiment, the diapers 1 are compressed in the left-right direction of the container 100 (the front-rear direction or thickness direction of the diapers 1), thereby making the container 100 more compact (smaller) than when not compressed. The compression direction of the diapers 1 and the stacking direction of the diaper group R are aligned with the left-right direction of the container 100.

[0083] When the diaper 1 is removed from the container 100 in a compressed state while stored, and after a certain period of time has passed since the diaper 1 was released from the compressed state, the thickness of the diaper 1 increases in the front-to-back direction (thickness direction) and approaches the thickness of the diaper 1 before being stored (before being compressed) in the container 100. This state in which the thickness of the diaper 1 has increased after being removed from the container 100 is referred to as the "recovered state." In this embodiment, the "recovered state" refers to the state after 96 hours have passed since the unopened container 100 was opened, multiple diapers 1 were removed, and the diaper 1 was left undisturbed in an environment at room temperature of 20°C and humidity of 60%. In the present invention, the "state after 5 minutes" and the "state after 96 hours" refer to, respectively, "the state after diaper 1 is removed from container 100 and left in an environment with a room temperature of 20°C and a humidity of 60% for 5 minutes" and "the state after diaper 1 is removed from container 100 and left in an environment with a room temperature of 20°C and a humidity of 60% for 96 hours."

[0084] As described above, the diapers 1 contained in the container 100 of this embodiment are compressed in the thickness direction (the front-to-rear direction of the diapers 1). Fig. 7A is a front view of the group of diapers R in the contained state. Fig. 7B is a front view of the group of diapers R in the recovered state. In the contained state, the length of the group of diapers R in the stacking direction (the direction of compression of the diapers 1, the left-to-right direction of the container 100) is LRp, and the length of each diaper 1 in the thickness direction is L1p (Figs. 6 and 7A). When all the diapers 1 of the group of diapers R are removed from the container 100 and released from the compressed state, each diaper 1 is in the recovered state (Fig. 7B). In the recovered state, the length of the group of diapers R in the left-to-right direction is LRr, and the length of each diaper 1 in the thickness direction is L1r. In other words, the stacking direction length LRr of the diaper group R in the recovery state is longer than the stacking direction length LRp of the diaper group R in the storage state (LRp < LRr), and the thickness direction length L1r of the diaper 1 in the recovery state is longer than the thickness direction length L1p of the diaper 1 in the storage state (L1p < L1r).

[0085] As the diaper 1 is compressed and recovered, the thickness direction of the absorbent body 11 in the recovered state (T11r) is longer than the thickness direction of the absorbent body 11 in the contained state (T11p) (T11p<T11r), as shown in Fig. 8. Fig. 8A is an enlarged schematic view of the absorbent body 11 in the compressed state. Fig. 8B is an enlarged schematic view of the absorbent body 11 in the recovered state.

[0086] In the container 100 of this embodiment, a plurality of diapers 1 are stored in a compressed state as a group R of diapers stacked in the left-right direction (a predetermined direction) within the container material 120. Even when stored in a compressed state, the diapers 1 can reduce the risk of the absorbent core 11a being crushed. Furthermore, while the container 100 is made compact by compressing the diapers 1, even when the diapers 1 are taken out of the container 100 and worn, they still retain an absorbency of at least 85% of the absorption rate 96 hours after removal from the container 100. This makes it easier to achieve both the compactness of the container 100 and the maintenance of the absorbency of the diapers 1.

[0087] This diaper 1 has an absorbent core 11a containing at least liquid-absorbent fibers (e.g., pulp fibers) and a superabsorbent polymer (SAP), and a skin-side core wrap portion 11ba arranged adjacent to the skin-side surface of the absorbent core 11a.

[0088] 5B and 8, the skin-side core wrap portion 11ba is composed of a base material layer bb and a fiber layer bf. The fiber layer bf is a fiber layer containing 18 gsm or more of thermoplastic resin fiber. In this embodiment, the base material layer bb and the fiber layer bf are bonded to each other with an adhesive such as a hot melt adhesive.

[0089] Furthermore, the length LRp (see Figure 7A) in a predetermined direction of the diaper group R in the unopened container 100 is 70% or less of the length LRr (see Figure 7B) in a predetermined direction of the diaper group R 96 hours after the container 100 is opened and the diaper group R is removed (LRp < LRr x 70%), and the absorption rate of the diaper 1 in an absorption rate test 5 minutes after the container 100 is opened and the diaper 1 is removed is 85% or more of the absorption rate of the diaper 1 in an absorption rate test 96 hours after the container 100 is opened and the diaper 1 is removed.

[0090] When the thermoplastic resin fiber provided in the fiber layer bf of the skin-side core wrap portion 11ba is 18 gsm or more, the thickness of the fiber layer bf is more easily changed than in the absorbent core 11a when the diaper 1 is compressed in the stacking direction than when the thermoplastic resin fiber provided in the fiber layer bf is less than 18 gsm.

[0091] 8A , a force is applied in the thickness direction to the absorbent body 11 of the diaper 1 in the stored state due to compression. Therefore, the thickness direction length T11p of the absorbent body 11 in the stored state is shorter than the thickness direction length (not shown) of the absorbent body 11 of the diaper 1 before the diaper 1 is stored in the storage body 100. Furthermore, the thickness direction length T11p of the absorbent body 11 in the stored state is shorter than the thickness direction length T11r of the absorbent body 11 of the diaper 1 in the recovered state.

[0092] The thickness of the absorbent body 11 in the stored state (FIG. 8A) is compared with the thickness of the absorbent body 11 in the recovered state (FIG. 8B). Although there is a difference in the thickness direction between the absorbent core 11a in the stored state (Tap) and the absorbent core 11a in the recovered state (Tar), the difference in length is small. Meanwhile, the thickness direction length Tfp of the fibrous layer bf in the stored state is shorter than the thickness direction length Tfr of the absorbent core 11a in the recovered state (Lfp<Tfr). Thus, when force is applied to the diaper 1 in the stacking direction in the stored state, the fibrous layer bf of the skin-side core wrap portion 11ba is more easily crushed and deformed than the absorbent core 11a.

[0093] Even when the diaper 1 is compressed in the stacking direction to compact the storage body 100, the fiber layer bf of the absorbent body 11 of the diaper 1 is more likely to be crushed or deformed than the absorbent core 11a. This reduces the risk of the absorbent core 11a being crushed or deformed. This reduces the risk of the absorbent core 11a being crushed or deformed when the diaper 1 is worn by a wearer after the diaper 1 is removed from the storage body 100. This reduces the risk of excrement leaking from the diaper 1 due to inadequate absorption by the absorbent core 11a, or of the wearer feeling uncomfortable due to deformation of the highly rigid absorbent core 11a. Furthermore, because the fiber layer bf is made of thermoplastic resin fiber, the elasticity of the fiber allows the fiber layer bf to easily recover its thickness in the recovery state ( FIG. 8B ) even if it is once compressed in the thickness direction to enter the storage state ( FIG. 8A ).

[0094] Furthermore, since the length LRp of the diaper group R in a predetermined direction in the unopened container 100 is 70% or less of the length of the diaper group R in the predetermined direction 96 hours after the container 100 is opened and the diaper group R is removed, the container 100 can be made more compact in its packaged state than if the length LRp of the diaper group R in the unopened container 100 was longer than 70% of the length of the diaper group R in the predetermined direction 96 hours after the container 100 was opened and the diaper group R was removed. Furthermore, the absorption rate of diaper 1 in an absorption rate test 5 minutes after opening container 100 and removing diaper 1 is 85% or more of the absorption rate of diaper 1 in an absorption rate test 96 hours after opening container 100 and removing diaper 1. Therefore, even when diaper 1 is removed from container 100 in a compact state, it can have an absorption rate of 85% or more of the absorption rate of diaper 1 in a relaxed state 96 hours after removal from container 100.

[0095] The "state of diaper 1 96 hours after removal from container 100" refers to the state in which diaper 1 has recovered to a thickness substantially equal to the state immediately after manufacturing diaper 1 before storing diaper 1, or the state in which the diaper has completely recovered from compression in the stored state. In other words, diaper 1 and diaper group R are crushed and compressed in the thickness direction in the stored state, but after 96 hours have passed since opening container 100 and removing diaper 1 and diaper group R, the compression is relaxed and the effects of the compression are almost completely eliminated. The "state of diaper 1 5 minutes after removal from container 100" corresponds to the state in which diaper 1 is removed from container 100 and put on by a wearer.

[0096] In other words, even in the case of a diaper 1 in which the length LRp in a predetermined direction of the diaper group R in the stored state is compressed to 70% or less of the length LRp in the predetermined direction, the diaper 1 has an absorbent core 11a containing liquid-absorbent fibers and a superabsorbent polymer (SAP), a fiber layer bf having 18 gsm or more of thermoplastic resin fibers, and a skin-side core wrap portion 11ba composed of a base material layer bb, and the absorption rate of the diaper 1 in an absorption rate test 5 minutes after the storage body 100 is opened and the diaper 1 is removed is 85% or more of the absorption rate of the diaper 1 in an absorption rate test 96 hours later. Therefore, 5 minutes after the wearer or the like removes the diaper 1 from the storage body 100 and puts the diaper 1 on, the diaper 1 will be able to absorb excrement at an absorption rate of 85% or more of the rate at which the effects of compression have almost disappeared. Furthermore, even if the diaper 1 is compressed, the diaper 1 will have absorbency closer to that of an uncompressed diaper when worn than when the absorption rate of the diaper 1 in an absorption rate test five minutes after opening the container 100 and removing the diaper 1 is less than 85% of the absorption rate of the diaper 1 in an absorption rate test after 96 hours, thereby reducing the risk of excrement leaking from the diaper 1 when worn. As described above, the container 100 makes it easier to achieve both compactness of the container 100 and maintenance of the absorbency of the diaper 1.

[0097] <Absorption Rate Test> The "absorption rate test" can be performed using artificial urine by the following method: Measuring instruments, such as artificial urine, a burette and funnel (the burette is adjusted so that the drip rate is 10 ml / sec), a burette stand, a cylinder (diameter 60 mm, 550 g), and a stopwatch are used.

[0098] The artificial urine is prepared by mixing 10 liters of ion-exchanged water with (I), 200 g of urea (II), 80 g of sodium chloride (salt) (III), 8 g of magnesium sulfate (IV), 3 g of calcium chloride (V), and approximately 1 g of dye: Blue No. 1.

[0099] Samples A and B were used for evaluation. Sample A (Samples A1, A2, and A3) were diapers 5 minutes after the container was opened and the diaper was removed. Sample B (Samples B1, B2, and B3) were diapers 96 hours after the container was opened and the diaper was removed. While Sample A and Sample B differ in the time between removal from the container and testing, Sample A1 and Sample B1, Sample A2 and Sample B2, and Sample A3 and Sample B3 are diapers with the same configuration. Each disposable diaper of Sample A and Sample B is composed of the same materials as the above-described diaper 1, but Samples A1 and B1, Sample A2, Sample B2, and Sample A3 and B3 differ in the amount of thermoplastic resin fiber in the fiber layer bf of the skin-side core wrap portion 11ba. The skin-side core wrap portion 11ba of Samples A1 and B1 includes a base layer bb of 10 gsm fiber, 2 gsm hot melt adhesive, and a fiber layer bf of 13 gsm thermoplastic resin fiber. The skin-side core wrap portion 11ba of Samples A2 and B2 includes a base layer bb of 10 gsm fiber, 2 gsm hot melt adhesive, and a fiber layer bf of 15 gsm thermoplastic resin fiber. The skin-side core wrap portion 11ba of Samples A3 and B3 includes a base layer bb of 10 gsm fiber, 2 gsm hot melt adhesive, and a fiber layer bf of 18 gsm thermoplastic resin fiber. The diaper 1 of this embodiment corresponds to Samples A3 and B3.

[0100] The actual measurement is performed as follows: (1) Each sample is laid out in an unfolded state (separate the side seams 50, 50, open the diaper, and lay it flat). (2) Mark the artificial urine drop position on each sample with a marker. The artificial urine drop position is the center in the longitudinal direction and the center in the lateral direction of each unfolded and stretched sample. (3) Fix the burette at a position 10 mm above the drop position. (4) Place the burette at the drop position (center of the cylinder) and drop 100 ml of artificial urine. Simultaneously with this drop, start measuring the absorption rate with a stopwatch. (5) When the artificial urine in the cylinder is completely absorbed and disappears from the surface, stop the stopwatch to determine the time required for each sample to absorb 100 ml of artificial urine. The absorption rate of each sample can then be calculated by dividing the amount of artificial urine absorbed (100 ml) by the time required for absorption (amount of artificial urine absorbed / time required for absorption).

[0101] Figure 9 shows the results of the absorption rate test. Figure 9A shows the time [seconds] required for diaper samples A1, A2, and A3 to absorb 100 ml of artificial urine 5 minutes after the container was opened and the diapers were removed, and the absorption rate [ml / s] calculated from the amount of artificial urine (100 ml) and the time required for absorption. Figure 9B shows the time [seconds] required for diaper samples B1, B2, and B3 to absorb 100 ml of artificial urine 96 hours after the container was opened and the diapers were removed, and the absorption rate [ml / s] calculated from the amount of artificial urine (100 ml) and the time required for absorption. FIG. 9C shows the rate ratios [%] between samples A1 and B1, between samples A2 and B2, and between samples A3 and B3. Specifically, it shows the value obtained by dividing the absorption rate of sample A1 by the absorption rate of sample B1 (Absorption rate of A1 / Absorption rate of B1), the value obtained by dividing the absorption rate of sample A2 by the absorption rate of sample B2 (Absorption rate of A2 / Absorption rate of B2), and the value obtained by dividing the absorption rate of sample A3 by the absorption rate of sample B3 (Absorption rate of A3 / Absorption rate of B3).

[0102] As described above, after 96 hours have passed since the container 100 was opened and the diaper was removed, the compression is relaxed and the effects of the compression are almost eliminated. In other words, the larger the value (A / B) obtained by dividing the absorption rate of Sample A (A1, A2, A3) by the absorption rate of Sample B (B1, B2, B3), the closer the absorbency is to the state in which the effects of compression are almost eliminated when the diaper is removed from the container 100 and worn (after 5 minutes have passed).

[0103] 9C , for samples A1, B1, A2, and B2, which have 13 gsm and 15 gsm thermoplastic resin fibers in the fiber layer bf of the skin-side core wrap portion 11ba, the absorption rates of samples A (A1, A2) divided by the absorption rates of samples B (B1, B2) (absorption rate of A1 / absorption rate of B1, absorption rate of A2 / absorption rate of B2) are 79.5% and 82.7%, respectively. In contrast, for samples A3 and B3, which have 18 gsm thermoplastic resin fibers in the fiber layer bf of the skin-side core wrap portion 11ba of the diaper 1 of this embodiment, the absorption rate of sample A3 divided by the absorption rate of sample B3 (absorption rate of A3 / absorption rate of B3) is 91.3%.

[0104] The results of the absorption rate test clearly show that for diapers (Samples A1 and B1, and Samples A2 and B2) with less than 18 gsm of thermoplastic resin fiber in the fiber layer bf of the skin-side core wrap portion 11ba, the absorption rate 5 minutes after opening the container 100 and removing the diaper was less than 85% of the absorption rate 96 hours after opening the container 100. On the other hand, for diapers 1 (Samples A3 and B3) with 18 gsm of thermoplastic resin fiber in the fiber layer bf of the skin-side core wrap portion 11ba, the absorption rate 5 minutes after opening the container 100 and removing the diaper was 85% or more of the absorption rate 96 hours after opening the container 100 and removing the diaper. These results show that, since the diaper 1 of this embodiment has thermoplastic resin fibers of 18 gsm or more in the fiber layer bf of the skin-side core wrap portion 11ba, when the diaper 1 is removed from the container 100 and worn (the state 5 minutes after the diaper 1 is removed from the container 100), the diaper 1 has absorbency (absorption rate of 85% or more) similar to the state 96 hours after the container 100 is opened and the diaper 1 is removed.

[0105] Therefore, since the absorption rate 5 minutes after opening the container 100 and removing the diaper 1 is 85% or more of the absorption rate 96 hours after opening the container 100 and removing the diaper 1, the container 100 can achieve both compactness of the container 100 and maintaining the absorbency of the diaper 1.

[0106] In the absorbent body 11 of the diaper 1 of this embodiment, the skin-side core wrap portion 11ba, the absorbent core 11a, and the non-skin-side core wrap portion 11bb are fixed to one another with an adhesive such as a hot-melt adhesive. The base material layer bb and the fiber layer bf are fixed to one another with an adhesive such as a hot-melt adhesive to form the sheet-like skin-side core wrap portion 11ba. While the base material layer bb and the fiber layer bf are joined with a hot-melt adhesive in this embodiment, this is not limiting. For example, the sheet-like skin-side core wrap portion 11ba may be formed by fixing the base material layer bb and the fiber layer bf together by entanglement (intertwining) of the fibers of the base material layer bb and the fiber layer bf without using an adhesive.

[0107] The fiber layer (bf) of this embodiment is provided with thermoplastic resin fibers of 18 to 30 gsm. Examples of the thermoplastic resin fibers include synthetic fibers such as polyethylene, polyester, polypropylene, and nylon. The thermoplastic resin fibers of the fiber layer (bf) are preferably short fibers, specifically, fibers with an average fiber length of 15 mm or more and 100 mm or less.

[0108] Regarding the fiber layer bf, it is preferable that the fibers constituting the fiber layer bf contain PET fiber (polyethylene terephthalate). PET fiber has high rigidity, so when the fiber layer bf contains PET fiber, the thickness of the fiber layer bf is more likely to recover after being released from compression in a contained state than when the fiber layer bf does not contain PET fiber. The fiber layer bf containing PET fiber may be a fiber layer bf consisting of PET fiber alone, or may be a fiber layer bf containing composite fibers containing PET fiber. An example of a composite fiber containing PET fiber is a core-sheath fiber, such as PET / PE (core / sheath).

[0109] It is also preferable that at least a portion of the fibers of the fiber layer bf have hydrophilic properties. The fiber layer bf having hydrophilic fibers allows the fiber layer bf to more easily absorb excrement. The more easily the fiber layer bf absorbs excrement, the more easily it can keep excrement away from the wearer's skin when worn, making it less likely for excrement to remain on the surface (top sheet 12) of the diaper 1. The fiber layer bf may be composed solely of hydrophilic fibers, or may be composed of a combination of hydrophilic and non-hydrophilic fibers. Furthermore, the hydrophilic fibers may be hydrophilic fibers themselves, or may be fibers that have been subjected to a hydrophilization treatment. For example, the fiber layer bf may be composed of PET fibers whose surfaces have been subjected to a hydrophilization treatment. In the case where the fiber layer bf is composed of a PET / PE (core / sheath) composite fiber, the surface of the PE may be subjected to a hydrophilization treatment. As the hydrophilization treatment, known hydrophilization techniques such as SR treatment, application of a hydrophilic oil agent, graft polymerization of a hydrophilic monomer, plasma treatment, etc. can be used.

[0110] The base material layer bb is a sheet-like layer, and examples thereof include tissue, spunbond nonwoven fabric, etc. The base material layer bb is preferably formed of long fibers, and specifically, is preferably formed of fibers having an average fiber length of more than 100 mm.

[0111] It is preferable that at least a portion of the fibers of the base layer bb have hydrophilic properties. The base layer bb having hydrophilic fibers facilitates the absorption of excrement by the base layer bb. The more easily the base layer bb absorbs excrement, the more easily it can keep excrement away from the wearer's skin when worn, making it less likely for excrement to remain on the surface (top sheet 12) of the diaper 1. The base layer bb may be composed solely of hydrophilic fibers, or may be composed of a combination of hydrophilic and non-hydrophilic fibers. Furthermore, the hydrophilic fibers may be hydrophilic fibers themselves, or may be fibers that have been subjected to a hydrophilic treatment. Examples of hydrophilization treatments that can be used include known hydrophilization techniques such as SR treatment, application of a hydrophilic oil, graft polymerization of a hydrophilic monomer, and plasma treatment.

[0112] The base layer bb of the diaper 1 of this embodiment is formed of a tissue made of hydrophilic fibers. The base layer bb is formed of hydrophilic fibers, which allows the base layer bb to easily absorb liquid. Furthermore, since the base layer bb is formed of a tissue made of hydrophilic fibers, when the diaper 1 is worn, excrement absorbed from the skin side of the diaper 1 (the skin side of the top sheet 12) is easily transferred from the top sheet 12 to the base layer bb, making it easier to move the excrement away from the wearer's skin. Furthermore, the risk of excrement once absorbed by the absorbent core 11 returning to the top sheet 12 is reduced.

[0113] The base layer bb is not limited to being made of tissue. For example, it may be a spunbond / meltblown / spunbond nonwoven fabric (SMS nonwoven fabric) made of hydrophilic fibers. Even when the base layer bb is made of a spunbond / meltblown / spunbond nonwoven fabric made of hydrophilic fibers, similar to the case of tissue made of hydrophilic fibers, when the diaper 1 is worn, excrement absorbed from the skin side of the diaper 1 (the skin side of the top sheet 12) is easily transferred from the top sheet 12 to the base layer bb, thereby facilitating the transfer of excrement away from the wearer's skin. Furthermore, the risk of excrement once absorbed by the absorbent body 11 returning to the top sheet 12 can be reduced. Furthermore, at least a portion of the fibers of the spunbond / meltblown / spunbond nonwoven fabric (SMS nonwoven fabric) making up the base layer bb may be hydrophilic fibers.

[0114] Furthermore, in the skin-side core wrap portion 11ba, the fiber layer bf is preferably provided closer to the absorbent core 11a than the base material layer bb, i.e., closer to the skin than the base material layer bb in the absorbent body 11. In the skin-side core wrap portion 11ba, the fiber layer bf is provided closer to the absorbent core 11a than the base material layer bb, so that the fiber layer bf is adjacent to the absorbent core 11a. When the diaper 1 is removed from its compressed, contained state and the compression of the diaper 1 (absorbent body 11) and the fiber layer bf is released, the thickness of the fiber layer bf recovers, and the spacing between the fibers (thermoplastic resin fibers) in the fiber layer bf increases. The spacing between the fibers (thermoplastic resin fibers) in the fiber layer bf tends to be longer than the spacing between the fibers (liquid-absorbent fibers) in the absorbent core 11a. This allows the excrement absorbed from the skin side of the diaper 1 to be easily transferred by capillary action from the fiber layer bf to the absorbent core 11a adjacent to the fiber layer bf on the non-skin side, thereby keeping the excrement away from the wearer's skin, which in turn improves comfort when the diaper 1 is worn.

[0115] Furthermore, when the fiber layer bf of the skin-side core wrap portion 11ba is located closer to the absorbent core 11a than the base layer bb, it is preferable that the thermoplastic resin fibers of the fiber layer bf be partially entangled with the liquid-absorbent fibers of the absorbent core 11a. Because the fiber layer bf of the absorbent body 11 of the diaper 1 is more easily crushed and deformed than the absorbent core 11a, this reduces the risk of crushing or deforming the absorbent core 11a when the diaper 1 is worn after being removed from the container 100. Furthermore, the entanglement of the thermoplastic resin fibers of the fiber layer bf with the liquid-absorbent fibers of the absorbent core 11a facilitates the transfer of excrement from the skin-side fiber layer bf to the non-skin-side absorbent core 11a, thereby keeping the excrement away from the wearer's skin. This reduces the risk of excrement contacting the wearer's skin and improves comfort when worn. Furthermore, when the skin-side core wrap portion 11ba (fiber layer bf) and the absorbent core 11a are fixed using adhesive, as in this embodiment, it is possible to reduce the amount of adhesive used for fixing by entangling the fibers, or to fix the skin-side core wrap portion 11ba (fiber layer bf) and the absorbent core 11a by entangling the fibers without using a fixing means such as adhesive between the skin-side core wrap portion 11ba (fiber layer bf) and the absorbent core 11a.

[0116] Furthermore, in the skin-side core wrap portion 11ba, the basis weight (weight of thermoplastic resin fibers per unit area) of the fiber layer bf is preferably higher than the basis weight (weight of fibers per unit area) of the fibers of the base material layer bb. Due to the elasticity of the thermoplastic resin fibers of the fiber layer bf, even if the fiber layer bf is once compressed in the thickness direction and placed in a stored state, it is easy for the thickness of the fiber layer bf to recover in the recovered state. By having the basis weight of the thermoplastic fibers of the fiber layer bf higher than the basis weight of the fibers of the base material layer bb, the thickness of the fiber layer bf of the diaper 1 compressed in the state of the container 100 can be more easily restored than when the basis weight of the thermoplastic resin fibers of the fiber layer bf is lower than the basis weight of the fibers of the base material layer bb.

[0117] As described above, the diaper 1 preferably has a top sheet 12 closer to the skin than the skin-side core wrap portion 11ba, and the basis weight of the thermoplastic resin fibers of the fiber layer bf is preferably higher than the basis weight of the fibers of the top sheet 12. Due to the elasticity of the thermoplastic resin fibers of the fiber layer bf, the fiber layer bf easily recovers its thickness in the recovered state even after being compressed in the thickness direction and placed in a contained state. Therefore, when the basis weight of the thermoplastic resin fibers of the fiber layer bf is higher than the basis weight of the fibers of the top sheet 12, the fiber layer bf of the diaper 1 compressed in the container 100 is more likely to recover its thickness than when the basis weight of the thermoplastic resin fibers of the fiber layer bf is lower than the basis weight of the fibers of the top sheet 12.

[0118] Furthermore, when the diaper 1 has a top sheet 12 closer to the skin than the skin-side core wrap portion 11ba, it is preferable that the average thickness of the thermoplastic resin fibers of the fiber layer bf be thicker than the average thickness of the fibers of the top sheet 12. Due to the elasticity of the thermoplastic resin fibers of the fiber layer bf, even if the fiber layer bf is once compressed in the thickness direction and stored in a storage state, it is likely to recover its thickness in the recovery state. Therefore, when the average thickness of the thermoplastic resin fibers of the fiber layer bf is thicker than the average thickness of the fibers of the top sheet 12, the thickness of the fiber layer bf of the diaper 1 compressed in the storage body 100 is more likely to recover than when the average thickness of the thermoplastic resin fibers of the fiber layer bf is thinner than the average thickness of the fibers of the top sheet 12. The average thickness of the thermoplastic resin fibers of the fiber layer bf and the average thickness of the fibers of the top sheet 12 can each be measured by a known method. For example, the average thickness of each fiber can be estimated using enlarged images obtained by a digital microscope, scanning electron microscope, or the like.

[0119] As described above, the diaper 1 preferably has an outer sheet 14 closest to the skin, and the basis weight of the thermoplastic resin fibers of the fiber layer bf is preferably higher than that of the fibers of the outer sheet 14. Due to the elasticity of the thermoplastic resin fibers of the fiber layer bf, the fiber layer bf easily recovers its thickness in the recovery state even after being compressed in the thickness direction and stored. Therefore, when the basis weight of the thermoplastic resin fibers of the fiber layer bf is higher than that of the fibers of the outer sheet 14, the fiber layer bf of the diaper 1 compressed in the storage body 100 can easily recover its thickness compared to when the basis weight of the thermoplastic resin fibers of the fiber layer bf is lower than that of the fibers of the outer sheet 14.

[0120] It is preferable that the value (Tfr / Tfp) obtained by dividing the thickness Tfr of the fiber layer bf 96 hours after the container 100 is opened and the diaper 1 is taken out (FIG. 8B) by the thickness Tfp of the fiber layer bf when the container 100 is opened and the diaper 1 is taken out (FIG. 8A) is less than or equal to the value (Tar / Tap) obtained by dividing the thickness Tar of the absorbent core 11a 96 hours after the container 100 is opened and the diaper 1 is taken out (FIG. 8B) by the thickness Tap of the absorbent core 11a when the container 100 is opened and the diaper 1 is taken out (FIG. 8A) (Tfr / Tfp≦Tar / Tap).

[0121] As a result, when force is applied to the diaper 1 in the stacking direction in the stored state, the fiber layer bf of the skin-side core wrap portion 11ba is more likely to be crushed and deformed than the absorbent core 11a than when Tfr / Tfp > Tar / Tap. Therefore, even when the diaper 1 is compressed in the stacking direction to make the storage body 100 compact, the fiber layer bf in the absorbent body 11 of the diaper 1 is more likely to be crushed and deformed than the absorbent core 11a, thereby reducing the risk of the absorbent core 11a being crushed or deformed. This reduces the risk of the absorbent core 11a being excessively crushed or deformed while still making the storage body 100 compact, thereby reducing the risk of a decrease in the absorbency of the diaper 1.

[0122] Furthermore, as in the diaper 1 of this embodiment, it is preferable that the fibrous layer bf is located closer to the absorbent core 11a than the base material layer bb, the top sheet (skin-side sheet) 12 is located closer to the skin than the skin-side core wrap portion 11ba (base material layer bb), and an adhesive is used to secure the top sheet 12 to the base material layer bb, and an adhesive is used to secure the base material layer bb to the fibrous layer bf. In such a case, it is more preferable that the basis weight of the adhesive between the base material layer bb and the fibrous layer bf is lower than the basis weight of the adhesive between the top sheet 12 and the base material layer bb.

[0123] Generally, adhesives such as hot melt adhesives may hinder the absorption of bodily exudates. Therefore, by making the basis weight of the adhesive between the base layer bb and the fibrous layer bf lower than the basis weight of the adhesive between the top sheet 12 and the base layer bb, when bodily exudates are absorbed through the skin-facing side of the diaper 1 while worn, the bodily exudates are more easily transferred from the base layer bb to the fibrous layer bf, and the bodily exudates are more easily moved away from the wearer's skin than when the basis weight of the adhesive between the base layer bb and the fibrous layer bf is higher than when the basis weight of the adhesive between the top sheet 12 and the base layer bb. As a result, discomfort caused by bodily exudates continuously contacting the wearer's skin while worn can be reduced.

[0124] In this embodiment, the core wrap sheet 11b is configured as a typical core wrap sheet in which the skin-side core wrap portion 11ba includes a substrate layer bb and a fiber layer bf, while the non-skin-side core wrap portion 11bb does not include a substrate layer bb or a fiber layer gf. However, this is not limited to this. Like the skin-side core wrap portion 11ba, the non-skin-side core wrap portion 11bb may also be configured with a substrate layer (not shown) and a fiber layer (not shown). Even when the diaper 1 is compressed within the container 100, not only the fiber layer bf of the skin-side core wrap portion 11ba but also the fiber layer of the non-skin-side core wrap portion 11bb of the diaper 1 are easily compressed, thereby further reducing the risk of the absorbent core 11a being crushed or deformed. This reduces the risk of a decrease in absorbency due to compression of the absorbent core 11a. In addition, the fiber layer bf of the skin-side core wrap portion 11ba and the fiber layer of the non-skin-side core wrap portion 11bb, which are compressed in the stored state, tend to recover in thickness in the recovery state, making it easier to restore the thickness and softness of the absorbent body 11 (diaper 1) compared to the diaper 1 in the stored state, and also making it easier to reduce the decrease in feel against the skin when worn.

[0125] Furthermore, when the non-skin-side core wrap portion 11bb is composed of a base material layer and a fiber layer, it is preferable that the fiber layer be located closer to the absorbent core 11a (skin side) than the base material layer in the non-skin-side core wrap portion 11bb. Even when the diaper 1 is compressed in the container 100, not only the fiber layer bf of the skin-side core wrap portion 11ba of the diaper 1 but also the fiber layer of the non-skin-side core wrap portion 11bb adjacent to the absorbent core 11a are easily compressed, thereby further reducing the risk of the absorbent core 11a being crushed or deformed. This reduces the risk of a decrease in absorbency due to compression of the absorbent core 11a.

[0126] The diaper 1 may also have a compressed section e formed by compressing at least the absorbent core 11a and the skin-side core wrap section 11ba at a position where the absorbent core 11a and the skin-side core wrap section 11ba overlap when viewed from the skin side. Fig. 10 is a plan view of the absorbent main body 10 when the absorber 11 includes compressed sections e. The absorbent main body 10 shown in Fig. 10 has a plurality of compressed sections e formed by compressing the top sheet 12, the skin-side core wrap section 11ba, the absorbent core 11a, and the non-skin-side core wrap section 11bb in the thickness direction. The compressed sections e may be portions formed by compressing at least the absorbent core 11a and the skin-side core wrap section 11ba at a position where the absorbent core 11a and the skin-side core wrap section 11ba overlap when viewed from the skin side of the absorbent main body 10 (diaper 1). In the absorbent body 10 shown in Figure 10, when viewed from the skin side of the diaper 1, multiple circular compressed portions e are arranged in a staggered (dot-like) pattern over almost the entire area overlapping with the absorbent core 11a.

[0127] 10 , in the region of the absorbent main body 10 that overlaps with the absorbent core 11a when viewed from the skin side, the region where the compressed section e is not provided, i.e., the region that is not compressed, is designated as the non-compressed section n, and is indicated by the diagonally downward left line. In the non-compressed section n, the density of the liquid-absorbent fibers in the absorbent core 11a is lower than in the compressed section e, and the fiber density of the fiber layer bf is also lower. In this embodiment, the non-compressed section n refers to the portion of the absorbent core 11a where the density of the liquid-absorbent fibers is lower than in the compressed section e, and the fiber density of the fiber layer bf is also lower, but this is not limited to this. Instead of the non-compressed section n, the absorbent main body 10 (absorbent body 11) may have a compressed portion where the density of the liquid-absorbent fibers in the absorbent core 11a is lower than in the compressed section e, and the fiber density of the fiber layer bf is lower. In other words, it is preferable to have a compressed portion e and a low-density portion (corresponding to a non-compressed portion n) in which the density of the liquid-absorbent fibers in the absorbent core 11a is lower than that in the compressed portion e, regardless of whether compression is performed or not, and the density of the fibers in the fiber layer bf is lower.

[0128] Since the compressed portions e are high-density portions with an increased fiber density, excrement is easily drawn into the compressed portions e by capillary action. Therefore, when the diaper 1 is worn, the diaper 1 includes compressed portions e in which at least the absorbent core 11a and the skin-side core wrap portion 11ba are compressed. Therefore, when the fiber layer bf of the skin-side core wrap portion 11ba absorbs excrement, the absorbed excrement is easily drawn into the compressed portions e and easily diffused along the compressed portions e, which helps to reduce the risk of localized swelling of the fiber layer bf of the skin-side core wrap portion 11ba.

[0129] In this embodiment, a plurality of circular compressed portions e are arranged in a staggered pattern, but this is not limiting. There may be one or more compressed portions e. The compressed portions e may have any shape, such as a circle or a rectangle. Furthermore, the compressed portions e may be arranged in any pattern, such as a staggered pattern, a linear pattern (striped pattern), or a lattice pattern.

[0130] However, as shown in Figure 10, it is preferable that the compressed portions e have portions adjacent to non-compressed portions n (low-density portions) in the longitudinal or lateral direction of the diaper 1 (absorbent main body 10). This allows the compressed portions e, which have a high fiber density, to absorb liquid by capillary action first, facilitating the transfer of excrement from the wearer's skin toward the absorbent core 11a. Once absorbed by the compressed portions e, the excrement is then more easily transferred to the adjacent non-compressed portions n (low-density portions) in the longitudinal or lateral direction. This reduces the risk of the compressed portions e absorbing more excrement than their absorption capacity would allow, resulting in a reduction in their absorption capacity. This also reduces the risk of excrement continuously contacting the wearer's skin, which in turn reduces discomfort during wear and the risk of excrement leaking from the diaper 1.

[0131] 10 , when the absorbent main body 10 (diaper 1) has a compressed section e and a non-compressed section n at the position where the absorbent core 11a and the skin-side core wrap section 11ba overlap when viewed from the skin side, it is preferable that the center of the length from the skin-side surface of the skin-side core wrap section 11ba to the non-skin-side surface of the absorbent core 11a at the compressed section e in the thickness direction of the diaper 1 (absorbent main body 10) is located closer to the skin side than the center of the length from the skin-side surface of the skin-side core wrap section 11ba to the non-skin-side surface of the absorbent core 11a at the non-compressed section n. The lengths from the skin-side surface of the skin-side core wrap section 11ba to the non-skin-side surface of the absorbent core 11a at the compressed section e and the non-compressed section n refer to the lengths in the recovered state (see L11 in FIG. 8 ). As a result, when the diaper 1 is worn, the compressed sections e, where the density of each fiber is high, first facilitate the absorption of liquid by capillary action, facilitating the movement of excrement from the wearer's skin toward the absorbent core 11a. This facilitates the movement of excrement absorbed by the compressed sections e to the non-compressed sections n (low-density sections) while facilitating the movement of excrement away from the wearer's skin, thereby reducing the risk of excrement remaining in the compressed sections e and reducing the risk of stagnation in the absorption of excrement in the diaper 1.

[0132] Furthermore, when the diaper 1 has an absorbent core 11a containing at least liquid-absorbent fibers (e.g., pulp fibers) and a superabsorbent polymer (SAP), and a skin-side core wrap portion 11ba arranged adjacent to the skin-side surface of the absorbent core 11a, and the skin-side core wrap portion 11ba is composed of a base material layer bb and a fiber layer bf (Figures 5B and 8), it is preferable that the basis weight (weight of thermoplastic resin fibers per unit area) of the thermoplastic resin fibers of the fiber layer bf is higher than the basis weight (weight of fibers per unit area) of the fibers of the base material layer bb, and it is preferable that the fiber layer bf is arranged closer to the absorbent core 11a than the base material layer bb (closer to the skin than the base material layer bb).

[0133] As a result, when a force is applied to the diaper 1 in the thickness direction, such as when the diaper 1 is stored or when the wearer is wearing the diaper 1, the fiber layer bf of the skin-side core wrap portion 11ba is more likely to be crushed and deformed than the absorbent core 11a. Therefore, even when the diaper 1 is compressed in the thickness direction, the fiber layer bf in the absorbent body 11 of the diaper 1 shrinks in the thickness direction more than the absorbent core 11a, thereby reducing the risk of the absorbent core 11a being crushed or deformed.

[0134] ===Other Embodiments= ...

[0135] LIST OF SYMBOLS 1 Diaper (pants-type disposable diaper, absorbent article), 10 Absorbent body, 11 Absorbent body, 11a Absorbent core, 11b Core wrap sheet, 11ba Skin-side core wrap portion, 11bb Non-skin-side core wrap portion, 11c Constricted portion, 12 Top sheet (skin-side sheet), 13 Back sheet, 14 Outer sheet, 15 Leakage-preventing wall portion, 16 Leakage-preventing wall elastic member, 17 Leg-hole elastic member, 20 Waist member, 30 Front waist portion, 30sw Side portion, 31 Skin-side sheet, 32 Non-skin-side sheet, 32f Folded portion, 35 Waist elastic member, 36 Skin-side sheet, 40 Rear waist portion, 40b Buttocks cover, 40sw Side portion, 41 Skin-side sheet, 42 Non-skin-side sheet, 42f: folded portion, 45: waist elastic member, 46: skin-side sheet, 47: curved elastic member, 50: side joint portion, 100: container (absorbent article container), 120: container material, 121: handle region, 122: handle portion, 200: surface, 200A: front surface, 200B: side surface, 200D: upper surface, bb: base material layer, bf: fiber layer, e: compressed portion, n: non-compressed portion (low density portion), BH: waist opening, LH: leg opening, R: diaper group

Claims

1. An absorbent article container having a plurality of absorbent articles and a container material for containing the plurality of absorbent articles, wherein the plurality of absorbent articles are contained within the container material as a group of absorbent articles stacked in a predetermined direction, wherein the absorbent articles have an absorbent core comprising at least a liquid-absorbent fiber and a superabsorbent polymer, and a skin-side core wrap portion provided adjacent to the skin-side surface of the absorbent core, wherein the skin-side core wrap portion is composed of a base material layer and a fiber layer, and wherein the fiber layer is provided with 18 gsm or more of thermoplastic resin fiber, wherein the length in the predetermined direction of the group of absorbent articles in the unopened absorbent article container is 70% or less of the length in the predetermined direction of the group of absorbent articles 96 hours after the absorbent article container is opened and the group of absorbent articles is removed, and An absorbent article container, characterized in that the absorption rate of the absorbent article in an absorption rate test 5 minutes after the absorbent article container is opened and the absorbent article is removed is 85% or more of the absorption rate of the absorbent article in an absorption rate test 96 hours after the absorbent article container is opened and the absorbent article is removed.

2. An absorbent article container according to claim 1, characterized in that the fiber layer is provided closer to the absorbent core than the base material layer.

3. An absorbent article container as described in claim 2, characterized in that the thermoplastic resin fibers of the fiber layer have a portion intertwined with the liquid-absorbent fibers of the absorbent core.

4. An absorbent article container as described in claim 2 or 3, wherein the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, an adhesive is used to fix the skin-side sheet and the base material layer, an adhesive is used to fix the base material layer and the fiber layer, and the basis weight of the adhesive between the base material layer and the fiber layer is lower than the basis weight of the adhesive between the skin-side sheet and the base material layer.

5. An absorbent article container according to any one of claims 1 to 3, characterized in that the base layer comprises fibers having hydrophilic properties.

6. An absorbent article container as described in claim 5, characterized in that the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the base material layer is a tissue formed of hydrophilic fibers.

7. An absorbent article container as described in claim 5, wherein the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the base material layer is a spunbond / meltblown / spunbond nonwoven fabric formed from hydrophilic fibers.

8. An absorbent article container according to any one of claims 1 to 3, characterized in that the basis weight of the thermoplastic resin fibers in the fiber layer is higher than the basis weight of the fibers in the base material layer.

9. An absorbent article container as described in any one of claims 1 to 3, wherein the absorbent article has a skin side sheet on the skin side of the skin side core wrap portion, and the basis weight of the thermoplastic resin fiber of the fiber layer is higher than the basis weight of the fiber of the skin side sheet.

10. An absorbent article container as claimed in any one of claims 1 to 3, wherein the absorbent article has an outer sheet on the side closest to the skin, and the basis weight of the thermoplastic resin fiber of the fiber layer is higher than the basis weight of the fiber of the outer sheet.

11. An absorbent article container as described in any one of claims 1 to 3, wherein the absorbent article has a skin-side sheet on the skin side of the skin-side core wrap portion, and the average thickness of the thermoplastic resin fibers of the fiber layer is thicker than the average thickness of the fibers of the skin-side sheet.

12. An absorbent article container as described in any one of claims 1 to 3, wherein the absorbent article has a non-skin side core wrap portion provided adjacent to the non-skin side of the absorbent core, and the non-skin side core wrap portion is composed of the base material layer and the fiber layer.

13. An absorbent article container as described in claim 12, characterized in that the fiber layer of the non-skin side core wrap portion is provided closer to the absorbent core than the base material layer.

14. An absorbent article container as described in any one of claims 1 to 3, characterized in that the absorbent article has a compressed portion in which at least the absorbent core and the skin side core wrap portion are compressed at a position where the absorbent core and the skin side core wrap portion overlap when viewed from the skin side.

15. An absorbent article container as described in claim 14, wherein the absorbent article has a non-compressed portion where the absorbent core and the skin side core wrap portion are not compressed at a position where the absorbent core and the skin side core wrap portion overlap when viewed from the skin side, and wherein in the thickness direction of the absorbent article, the center of the length from the skin side of the skin side core wrap portion to the non-skin side of the absorbent core at the compressed portion is located closer to the skin side than the center of the length from the skin side of the skin side core wrap portion to the non-skin side of the absorbent core at the non-compressed portion.

16. An absorbent article container as described in claim 14, wherein the absorbent article has a low-density portion at a position where the absorbent core and the skin-side core wrap portion overlap when viewed from the skin side, in which the density of the liquid-absorbent fibers of the absorbent core is lower than that of the compressed portion, and the density of the fibers of the fiber layer is lower, and the compressed portion has a portion adjacent to the low-density portion in the longitudinal direction or left-right direction of the absorbent article.

17. An absorbent article container as described in any one of claims 1 to 3, characterized in that the value obtained by dividing the thickness of the fiber layer 96 hours after the absorbent article container is opened and the absorbent article is removed by the thickness of the fiber layer when the absorbent article container is opened and the absorbent article is removed is less than or equal to the value obtained by dividing the thickness of the absorbent core 96 hours after the absorbent article container is opened and the absorbent article is removed by the thickness of the absorbent core when the absorbent article container is opened and the absorbent article is removed.

18. An absorbent article container according to any one of claims 1 to 3, characterized in that the fiber layer is made of fibers containing PET fibers.

19. An absorbent article container according to any one of claims 1 to 3, characterized in that at least a portion of the fibers of the fiber layer have a hydrophilic function.

20. An absorbent article having an absorbent core comprising at least liquid-absorbent fibers and a superabsorbent polymer, and a skin-side core wrap portion disposed adjacent to the skin-side surface of the absorbent core, wherein the skin-side core wrap portion is composed of a base material layer and a fiber layer, the basis weight of the thermoplastic resin fiber of the fiber layer is higher than the basis weight of the fiber of the base material layer, and the fiber layer is disposed closer to the absorbent core than the base material layer.

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