Absorbent article

Abstract

To provide an absorbent article that can be properly fixed to a wearer.SOLUTION: An absorbent article has a length along a longitudinal direction corresponding to a front-back direction of a wearer and a length along a width direction orthogonal to the longitudinal direction, and comprises: a front body area located on a front side of a wearer in the front-back direction; a back body area located on a back side of the wearer; a crotch area located between the front body area and the back body area; a plurality of tapes provided at one of the front body area and the back body area, disposed apart from each other in the longitudinal direction in at least one side of the width direction, extending outward in the width direction, and each including a sticking part disposed on a skin surface side of the wearer, and a regulation part for regulating an extending length in the width direction; a sticking object area provided on at least one non-skin surface side of the plurality of tapes and to which a sticking part of another tape can be stuck; and a sticking object part provided on an exterior surface of the other of the front body area and the back body area and to which the sticking part can be stuck.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Absorbent articles such as disposable diapers, absorbent pads, sanitary napkins, etc. For example, Patent Document 1 discloses a tape-type absorbent article in which fastening tapes having fastening means arranged on the side edges of side flaps are provided with target zones for removably fixing the fastening means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-201894 Summary of the Invention [Problem to be solved by the invention]

[0004] A tape-type absorbent article is secured to the wearer's body in a manner that surrounds the wearer's abdominal circumference. If the tapes are attached in an overlapping manner, the absorbent article can be secured in the original, ideal position. However, if the configuration does not allow the tapes to be attached in an overlapping manner, it becomes necessary to shift the tape attachment positions from the ideal attachment positions so that the tapes do not overlap. On the other hand, if the configuration allows the tapes to be attached in an overlapping manner, the tapes can be attached in an overlapping manner. However, overlapping the tapes can cause misalignment between the tapes, which can lead to the risk of one tape being attached to the other tape peeling off. If the tapes peel off, the tape-type absorbent article cannot be secured properly to the wearer.

[0005] An object of the present invention is to provide an absorbent article that can be properly fixed to a wearer. [Means for solving the problem]

[0006] An absorbent article according to one aspect of the present invention comprises: a length along a longitudinal direction corresponding to the front-to-back direction of the wearer; a length along a width direction perpendicular to the longitudinal direction; a front body region located in front of the wearer in the front-to-back direction, a back body region located behind the wearer, and a crotch region located between the front body region and the back body region; a tape provided in one of the front body region or the back body region, the tape being arranged in a plurality of positions spaced apart from one another in the longitudinal direction in at least one of the width directions, the tape extending outward in the width direction, and having an adhesive portion positioned on the skin side of the wearer and a restricting portion for restricting the extending length in the width direction; an attachment area provided on a non-skin-facing side of at least one of the plurality of tapes, to which the attachment portion of another tape can be attached; The garment further comprises an attachment portion provided on the exterior surface of the other of the front body region or the back body region, to which the attachment portion can be attached. [Effects of the Invention]

[0007] According to the present invention, an absorbent article that can be properly fixed to a wearer can be realized. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a diaper according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the diaper according to the embodiment. [Figure 3] FIG. 3 is a plan view of the diaper according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of a diaper according to an embodiment. [Figure 5] FIG. 5 is a diagram showing the dimensions of the tape and front patch provided on the diaper according to the embodiment. [Figure 6] FIG. 6 is an enlarged view of a tape provided on a diaper according to an embodiment. [Figure 7]FIG. 7 is an enlarged view of the tape in a state where it is attached to the diaper according to the embodiment. [Figure 8] FIG. 8 is an enlarged view showing the state in which the diaper according to the embodiment is attached. [Figure 9] FIG. 9 is an enlarged view showing the state in which the diaper according to the embodiment is attached. [Figure 10] FIG. 10 is a table showing the results of an experiment verifying the suitable tensile strength of the adhesive lines of the diaper according to the embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of a mark provided on a front patch of a diaper according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes an embodiment of the present invention. The embodiment described below is one aspect of the present invention and does not limit the technical scope of the present invention.

[0010] <Embodiment> In this embodiment, the longitudinal direction of a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as "diaper") is the direction connecting the front body portion facing the wearer's abdomen and the back body portion facing the back. A crotch section, which is positioned between the front body portion (one side in the longitudinal direction) and the back body portion (the other side in the longitudinal direction) (at the center in the longitudinal direction) and is located in front of the wearer's crotch (facing the crotch). When the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is the skin-facing side, and the side opposite the skin-facing side (the outer side when worn) is the non-skin-facing side. The thickness direction is the direction connecting the skin-facing side and the non-skin-facing side, and the width direction is the direction perpendicular to both the longitudinal direction and the thickness direction. A view from the thickness direction is referred to as a plan view. A diaper has a length along the longitudinal direction, which corresponds to the front-to-back direction of the wearer, and a length along the width direction, which is perpendicular to the longitudinal direction. Furthermore, terms relating to directions used in this application refer to directions that correspond to the front, back, left, and right of the wearer when worn. For example, the left-right direction in this application refers to the direction that corresponds to the left and right of the wearer when worn.

[0011] FIG. 1 is a perspective view of a diaper 1 according to an embodiment. The diaper 1 has a longitudinal length of 500 mm to 1100 mm. Such a diaper 1 is suitable for use by adults. The diaper 1 has a crotch region 1B, which corresponds to the crotch area covering the wearer's genitals when worn; a front body region 1F, which is located in front of the crotch region 1B and corresponds to the wearer's abdominal waist; and a back body region 1R, which is located behind the crotch region 1B and corresponds to the wearer's back waist. The left and right edges of the rear body region 1R are provided with mechanical fasteners (an example of an "adhesive portion" as used herein) 16 on the side facing the wearer's skin, and the front body region 1F is provided with front patches (an example of an "adhesive portion" as used herein) 2F with loops on the side facing away from the wearer's skin, and tapes (an example of "tapes" as used herein) 2L1, 2L2, 2R1, and 2R2 that can be attached with the mechanical fasteners 16. When the front body region 1F is positioned on the wearer's abdominal side and the back body region 1R is positioned on the wearer's dorsal side, and the tapes 2L1, 2L2, 2R1, and 2R2 are attached to the front patches 2F, the diaper 1 is secured to the wearer's body so as to surround the wearer's abdominal circumference and thighs. Because the diaper 1 is secured to the wearer's body in this manner, the wearer can freely change positions while wearing the diaper 1. The non-skin facing sides of tapes 2L1, 2L2, 2R1, and 2R2 are looped in the same manner as the non-skin facing side of front patch 2F, so that tapes 2L1, 2L2, 2R1, and 2R2 can be overlapped on front patch 2F.

[0012] In order to prevent the formation of gaps between the diaper 1 and the wearer's skin that could serve as a liquid outflow path, the diaper 1 is provided with leg gathers 3AL, 3AR in areas along the wearer's leg circumference (thighs), with three-dimensional gathers 3L, 3R located inward in the width direction of the diaper 1 from the leg gathers 3AL, 3AR, and a waist gather 3W in areas along the wearer's abdominal circumference. The leg gathers 3AL, 3AR, three-dimensional gathers 3L, 3R, and waist gathers 3W are held in close contact with the wearer's skin by the elastic force of the elastic members. Therefore, liquid excreted by the wearer is absorbed into the absorbent body 6 without leaking from the diaper 1. The elastic members may be selected from thread-like or strip-like rubber, etc., as appropriate.

[0013] FIG. 2 is an exploded perspective view of a diaper 1 according to an embodiment. FIG. 3 is a plan view of a diaper 1 according to an embodiment. In plan view, the diaper 1 according to this embodiment has a narrow, gourd-like shape in the crotch region 1B, with the front body region 1F and the back body region 1R being wider than the crotch region 1B. This planar shape allows the diaper 1 to easily fit the wearer's abdomen and buttocks when worn. The planar shape of the diaper 1 is not limited to a roughly gourd shape and may be, for example, a roughly rectangular or roughly battledore shape.

[0014] The diaper 1 is provided with a cover sheet 4 that forms the outer surface when worn. The cover sheet 4 is a sheet-like member having substantially the same planar shape (gourd-shaped) as the diaper 1, with constrictions 4KL, 4KR in the areas corresponding to the long sides. The cover sheet 4 forms the outer surface of the diaper 1, has sufficient rigidity to withstand friction with clothing, etc., and is provided to reinforce the back sheet 5 (described later) and improve the feel. The constrictions 4KL, 4KR are provided in the areas where the wearer's thighs are located. The cover sheet 4 is generally made of a nonwoven fabric made of synthetic fibers such as polypropylene, polyethylene, and polyethylene terephthalate. The cover sheet 4 is liquid-impermeable and moisture-permeable. The cover sheet 4 is not limited to a single-layer structure, but may be a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0015] The diaper 1 comprises a back sheet 5, an absorbent body 6, and a top sheet 8, which are layered in this order on the wearer-facing surface of the cover sheet 4. The back sheet 5 and the top sheet 8 are all sheet-like members having a roughly rectangular appearance, and the absorbent body 6 is a mat-like member having a roughly gourd-like appearance. The back sheet 5, the absorbent body 6, and the top sheet 8 are all layered in this order on the cover sheet 4 with their longitudinal directions coinciding with the longitudinal direction of the cover sheet 4.

[0016] The backsheet 5 has a generally rectangular appearance. The backsheet 5 is made of a thermoplastic, water-impermeable resin such as polyethylene film to prevent leakage of excreted fluid that has flowed into the absorbent body 6. The backsheet 5 has water-repellent properties to prevent urine and moisture from seeping out of the diaper 1 and breathability to prevent the diaper 1 from becoming stuffy when worn. The backsheet 5 may be breathable by having many tiny ventilation holes formed therein.

[0017] In addition, the back sheet 5 of the diaper 1 has a center mark CM (see Figure 1) that runs continuously in the longitudinal direction at the center of the width direction, so that the wearer can align the position of the center mark CM of the diaper 1 with the wearer's midline and wear the diaper in the correct position.

[0018] The diaper 1 includes a top sheet 8 that is disposed on the skin-facing side when the diaper 1 is worn. The top sheet 8 is the part that comes into contact with the wearer's skin when the diaper 1 is worn, and is a water-permeable sheet made of a liquid-permeable material that allows liquids such as urine to pass through. The top sheet 8 may be made of a woven fabric, a nonwoven fabric, a porous film, or the like. The nonwoven fabric may be made of thermoplastic resin fibers such as polypropylene, polyethylene, polyester, or nylon that have been hydrophilized. Alternatively, air-through nonwoven fabric, point-bonded nonwoven fabric, spun-bonded nonwoven fabric, melt-bonded nonwoven fabric, or the like may be used. A low-strength nonwoven fabric or the like may also be used.

[0019] An absorbent body 6 that absorbs fluid excreted by the wearer is disposed on the non-skin facing side of the top sheet 8. The longitudinal direction of the absorbent body 6 coincides with the longitudinal direction of the diaper 1.

[0020] The back sheet 5, absorbent body 6, and top sheet 8 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4, in which the back sheet 5, absorbent body 6, and top sheet 8 are laminated, the longitudinal ends of the back sheet 5, absorbent body 6, and top sheet 8 are located on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6 from the wearer's ventral to dorsal sides. Therefore, whether the wearer is lying supine or prone, excreted fluid comes into contact with the absorbent body 6 via the top sheet 8.

[0021] The diaper 1 also includes a pair of water-impermeable side sheets 9L, 9R arranged on both widthwise sides of the diaper 1 on the skin-facing side and extending longitudinally. The side sheets 9L, 9R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8. The side sheets 9L, 9R have fixing regions 9LA, 9RA arranged on their outer widthwise sides. The fixing regions 9LA, 9RA are bonded to the top sheet 8, absorbent core 6, and back sheet 5, which are components arranged on the non-skin-facing side, with a hot melt adhesive.

[0022] The side sheets 9L, 9R are adhered to the top sheet 8 with hot melt adhesive, and the widthwise inner edges of this hot melt adhesive form standing lines 3LL, 3RR (see Figure 3), with the insides of the standing lines 3LL, 3RR forming standable three-dimensional gathers 3L, 3R. The widthwise inner edges of the side sheets 9L, 9R are free regions 9LB, 9RB, which are the tips of the three-dimensional gathers 3L, 3R, and two rubber threads 3BL, 3BR, which are thread-like elastic members, are secured in the vicinity of the free regions 9LB, 9RB with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The widthwise inner sides of the side sheets 9L, 9R are also adhered to the top sheet 8 near the longitudinal ends, but the inside of the longitudinal inner sides, beyond the hot melt adhesive, are not adhered, allowing them to stand up toward the skin. When the elastic threads 3BL, 3BR contract, the three-dimensional gathers 3L, 3R inside the standing lines 3LL, 3RR rise toward the skin, and the free regions 9LB, 9RB become the tips on the skin-facing side. The raised three-dimensional gathers 3L, 3R inhibit the movement of liquids and loose stools outward in the width direction of the three-dimensional gathers 3L, 3R, thereby preventing side leakage.

[0023] Substantially the entire longitudinal ends of the upright lines 3LL, 3RR of the side sheets 9L, 9R are bonded to the top sheet 8 with a hot melt adhesive, forming fixed portions 33L, 33R. The fixed regions 9LA, 9RA extend to both longitudinal ends of the side sheets 9L, 9R, so that the side sheets 9L, 9R are joined to the top sheet 8 over substantially the entire longitudinal ends. The absorbent body 6 is thick because it is constructed by laminating multiple absorbent mats, and providing the fixed portions 33L, 33R in areas overlapping the absorbent body 6 makes it difficult for the biasing force of the rubber threads 3BL, 3BR to be transmitted to the fixed portions 33L, 33R. Providing the fixed portions 33L, 33R in areas where the absorbent body 6 does not extend makes it easier for the fixed portions 33L, 33R to follow the biasing force of the rubber threads 3BL, 3BR.

[0024] The free regions 9LB, 9RB located longitudinally outboard of the regions where the rubber threads 3BL, 3BR are arranged can also be left unattached to the top sheet 8 at the fixed portions 33L, 33R. Because the free regions 9LB, 9RB are not attached to the top sheet 8, the biasing force of the free regions 9LB, 9RB is transmitted gently throughout the entire fixed portions 33L, 33R, preventing the biasing force of the rubber threads 3BL, 3BR from concentrating on the longitudinal inside of the fixed portions 33L, 33R.

[0025] On the non-skin-facing sides of the upright lines 3LL, 3RR, rubber threads 4LB, 4RB, which are thread-like elastic members, are fixed between the cover sheet 4 and the back sheet 5 with a hot melt adhesive in a state stretched in the longitudinal direction of the diaper 1, with two threads each in the width direction. The rubber threads 4LB, 4RB are elastic members for forming the leg gathers 3AL, 3AR shown in Figure 1. The number of rubber threads 4LB, 4RB is not limited to two, and any appropriate number may be provided depending on the elastic force (contractile force) required by the design of the diaper 1. By arranging the rubber threads 4LB, 4RB in a stretched state, the contraction of the rubber threads 4LB, 4RB allows the diaper 1 to fit around the wearer's legs.

[0026] The cover sheet 4 is provided with rubber threads 4CL and 4CR extending inwardly of the rubber threads 4LB and 4RB in the width direction of the diaper 1 and along the longitudinal direction of the diaper 1 to prevent a gap from forming between the diaper 1 and the wearer's abdominal circumference. The rubber threads 4CL and 4CR are provided in accordance with the elastic force (contractile force) required for the design of the diaper 1. In this embodiment, three rubber threads 4CL and three rubber threads 4CR are provided.

[0027] In addition, the regions extending widthwise outward of the standing lines 3LL, 3RR of the three-dimensional gathers 3L, 3R in a plan view are the selvages 10L, 10R. In this embodiment, the selvages 10L, 10R are formed in the front body region 1F and the back body region 1R. The upper absorbent mat 6A is positioned to include the widthwise outer sides of the free regions 9LB, 9RB. The diaper 1 can increase the amount of liquid absorption by increasing the cushioning properties of the selvages 10L, 10R and by forming the upper absorbent mat 6A large. The selvages 10L, 10R may be formed in either the front body region 1F or the back body region 1R.

[0028] A pair of tapes 2L1, 2L2, 2R1, and 2R2 are arranged in the width direction at the outer widthwise edges of the back body region 1R. Mechanical fasteners 16 are provided on the skin-facing sides of the tapes 2L1, 2L2, 2R1, and 2R2. The mechanical fasteners 16 can be attached to the front patches 2F provided on the front body region 1F. By attaching the mechanical fasteners 16 to the front patches 2F provided on the front body region 1F, the diaper 1 can be fastened to the wearer's body in a manner that surrounds the wearer's abdomen and thighs.

[0029] Furthermore, a rubber thread 9ER is provided between the back sheet 5 and the top sheet 8 at a position further back than the end of the absorbent body 6, for forming a waist gather 3W. The rubber thread 9ER is provided between the back sheet 5 and the top sheet 8 with its longitudinal direction, which is the direction of stretch, oriented in the left-right direction of the diaper 1. Therefore, when the tapes 2L1, 2L2, 2R1, 2R2 provided on both the left and right sides of the rubber thread 9ER are attached to the front patch 2F on the abdominal side of the wearer, the rubber thread 9ER exerts a contractile force to tightly fit the diaper 1 to the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

[0030] Next, the structure of the absorbent body 6 will be described with reference to Figures 3 and 4. Figure 4 is a cross-sectional view of the diaper 1 according to this embodiment taken along line AA in Figure 3. In Figure 4, each component is shown thicker than it actually is to make the internal structure of the diaper 1 easier to understand, but in reality, the diaper 1 is very thin.

[0031] The diaper 1 includes an absorbent body 6 that absorbs and retains liquids such as urine. The absorbent body 6 is disposed on the non-skin-facing side of the top sheet 8, including the crotch region 1B, to absorb liquids excreted by the wearer. In this embodiment, the absorbent body 6 includes an absorbent core 6C containing an absorbent material and a core wrap sheet 7 that covers the entire absorbent core 6C. The longitudinal direction of the absorbent body 6 coincides with the longitudinal direction of the absorbent core 6C, the longitudinal direction of the core wrap sheet 7, and the longitudinal direction of the diaper 1.

[0032] The absorbent core 6C has an upper-layer absorbent mat 6A arranged on the top sheet 8 side and a lower-layer absorbent mat 6B arranged on the non-skin-facing side. In plan view, the upper-layer absorbent mat 6A has a gourd shape with the front and back regions 1F and 1R being wider than the crotch region 1B and the crotch region 1B being narrower. The lower-layer absorbent mat 6B is arranged below (on the non-skin-facing side of) the upper-layer absorbent mat 6A when viewed from the top sheet 8 side, and has a rectangular shape with its long sides aligned with the longitudinal direction of the diaper 1 in plan view. The upper and lower absorbent mats 6A and 6B are stacked in the thickness direction so that their widthwise centers are approximately aligned. In plan view, the upper absorbent mat 6A is larger than the lower absorbent mat 6B. The longitudinal direction of the absorber 6 coincides with the longitudinal directions of the upper and lower absorbent mats 6A and 6B and the diaper 1.

[0033] The crotch region 1B is sandwiched between the wearer's legs, so it is subjected to compressive pressure inward in the width direction. Meanwhile, in the front body region 1F and the back body region 1R, the wearer's weight exerts pressure in the thickness direction of the absorbent core 6C. To accommodate these pressures, the absorbent core 6C is provided with a constriction in the crotch region 1B. Furthermore, the upper-layer absorbent mat 6A and the lower-layer absorbent mat 6B are stacked to give the absorbent core 6C in the crotch region 1B a high basis weight. This prevents the absorbent core 6C from losing its shape inward in the width direction in the crotch region 1B. Furthermore, in the front body region 1F and the back body region 1R, the width of the absorbent core 6C is widened to increase the area on which the wearer's weight is applied, thereby preventing it from losing its shape in the thickness direction. For this reason, it is preferable to make the absorbent core 6C roughly gourd-shaped.

[0034] The absorbent core 6C has a structure in which granular absorbent resin (polymeric water-absorbing material) such as SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is held in the gaps between short fibers of cellulosic fibers such as pulp, rayon, or cotton, or short fibers made from synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. These short fibers and SAP are examples of absorbent materials.

[0035] In this embodiment, SAP particles refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein encompasses both compositions consisting solely of SAP and compositions containing SAP as the primary component, with other substances added to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives such as surface modifiers added to hydrophobize the particle surface, and unreacted monomers remaining during the synthesis of SAP. SAP particles can absorb approximately 10 to 100 times their own weight in liquid. The SAP particles may be, for example, granular particles with a diameter of approximately 0.1 to 0.5 mm before absorbing liquid.

[0036] While SAP particles can gel and retain liquid, it takes a certain amount of time for them to absorb the liquid. In diaper 1, the short fibers slow down the discharged liquid while diffusing it within the absorbent core 6C until the SAP particles have absorbed the liquid, allowing the discharged liquid to be absorbed by a wide range of SAP particles, thereby preventing the liquid from flowing back.

[0037] The absorbent core 6C may also have an SAP layer (not shown) formed of a large number of SAP particles, which is disposed between the upper absorbent mat 6A and the lower absorbent mat 6B. The absorbent core 6C diffuses liquids such as urine through the lower absorbent mat 6B, and retains the liquid through the SAP layer and the SAP contained in the upper absorbent mat 6A.

[0038] The core wrap sheet 7 is a water-permeable sheet that wraps the entire absorbent core 6C, and more specifically, covers the skin-facing side, non-skin-facing side, and side surfaces of the absorbent core 6C. The core wrap sheet 7 maintains the shape of the absorbent core 6C and prevents it from losing its shape when it is not in contact with the discharged liquid, and This prevents the SAP particles contained in the storage mat 6A and the SAP particles contained in the SAP layer from escaping. Furthermore, SAP particles in a state where they have not absorbed moisture are like hard sand grains, and if these SAP particles in a state where they have not absorbed moisture escape from the absorbent body 6 and come into direct contact with the wearer's skin, they may cause discomfort to the wearer. For this reason, the absorbent core 6C is wrapped in a core wrap sheet 7 to prevent the absorbent core 6C from losing its shape and to prevent the SAP particles from escaping to the outside of the absorbent body 6.

[0039] In this embodiment, the core wrap sheet 7 is made of a pulp fiber sheet or a thin nonwoven fabric. In this embodiment, tissue paper is used for the core wrap sheet 7. The core wrap sheet 7 may be formed from two sheets: an upper-layer core wrap sheet (not shown) disposed between the upper-layer absorbent mat 6A and the top sheet 8, and a lower-layer core wrap sheet (not shown) disposed on the non-skin-facing side of the lower-layer absorbent mat 6B, covering the side of the absorbent core 6C and further covering the outer side in the width direction of the upper-layer core wrap sheet. When the core wrap sheet 7 is formed from two sheets, the upper-layer core wrap sheet and the lower-layer core wrap sheet may be formed from different materials. For example, the upper-layer core wrap sheet may be a pulp fiber sheet, and the lower-layer core wrap sheet may be a resin nonwoven fabric. The core wrap sheet 7 may also be formed from a single sheet.

[0040] The diaper 1 includes two grooves 6H in the absorbent body 6, formed by compressing the absorbent body 6 in the thickness direction. The grooves 6H are located within the longitudinal length of the absorbent core 6C, with their front-to-rear ends located within the absorbent core 6C. The grooves 6H may be formed concavely on the skin-facing side by reducing the amount of absorbent material, such as staple fibers, forming the absorbent core 6C compared to other portions of the absorbent core 6C. Alternatively, the grooves 6H may be formed by penetrating the absorbent material, such as staple fibers, forming the skin-facing side of the absorbent core 6C, in the thickness direction. In this embodiment, the two grooves 6H are formed approximately parallel to each other in the width direction, centered on the crotch region 1B, and extend in the longitudinal direction of the absorbent core 6C. These grooves 6H are formed by compressing the absorbent core 6C, which is composed of an upper absorbent mat 6A and a lower absorbent mat 6B. Excreted liquid, such as urine, flows into the grooves 6H, moves longitudinally along the grooves 6H, and is rapidly absorbed over a wide area of ​​the absorbent body 6 in the longitudinal direction. Therefore, the diaper 1 according to this embodiment is provided with the grooves 6H, which allows for rapid diffusion of excreted liquid. As shown in Fig. 3, the grooves 6H do not reach the longitudinal ends of the absorbent body 6. Therefore, excreted liquid that has migrated outward in the longitudinal direction does not reach the longitudinal ends of the absorbent body 6, but remains inside the grooves 6H and is gradually absorbed.

[0041] As shown in Fig. 3, in a plan view, the two grooves 6H have a rectangular shape and are formed substantially parallel to each other with the crotch region 1B at the center. The width of the grooves 6H is 2 mm to 10 mm. The length of the grooves 6H is 150 mm to 250 mm. A diaper 1 having grooves 6H of this size is suitable for adults (care wear). The grooves 6H may be formed in a polygonal or elliptical shape, or a rectangular shape with arc-shaped front and rear ends, instead of a rectangular shape, in a plan view.

[0042] The two grooves 6H form valley folds when the diaper 1 is viewed from the side, and when the diaper 1 is worn, the absorbent 6 is folded in a W-shape in the crotch region 1B when viewed from the skin-facing side. As a result, the central portion of the absorbent 6 in the width direction sandwiched between the two grooves 6H rises convexly toward the skin-facing side and comes into contact with the wearer's skin. This allows the raised portion of the absorbent 6 to easily come into contact with the wearer's urethral opening, allowing it to effectively absorb and retain urine excreted from the urethral opening.

[0043] In addition, the position of the wearer's excretory hole is limited, and excreted liquid tends to be excreted in the same place, but there is a limit to the amount of excreted liquid that the absorbent body 6 can hold in the same place. The grooves 6H have the function of diffusing the excreted liquid generated by the wearer in the longitudinal direction of the absorbent body 6, and the grooves 6H The more dispersed discharged liquid is absorbed in the portions of the absorbent body 6 that have sufficient retention capacity. By providing the grooves 6H, urine can be absorbed by the entire diaper 1, thereby reducing the frequency with which the diaper 1 needs to be changed.

[0044] FIG. 5 shows the dimensions of the tapes 2L1, 2L2 and the front patch 2F of the diaper 1 according to this embodiment. The dimensions of the tapes 2L1, 2L2 and the tapes 2R1, 2R2 are the same, so the following description focuses on the tapes 2L1, 2L2. As shown in FIG. 5, the length of the front patch 2F in the longitudinal direction of the diaper 1 is designated LF. Furthermore, the length along the longitudinal direction of the diaper 1 connecting the mechanical fasteners 16 arranged on the tapes 2L1 and 2L2 is designated L1. The mechanical fasteners 16 of the tapes 2L1 and 2L2 both have the same length along the longitudinal direction of the diaper 1, designated LT (the width of the mechanical fastener 16). Furthermore, the length L2 is calculated by subtracting the length LT of the mechanical fastener 16 of the tape 2L1 from the length L1. Furthermore, the length between the mechanical fastener 16 of tape 2L1 and the mechanical fastener 16 of tape 2L2 is defined as L3. The front patch 2F has an edge on the crotch side in the longitudinal direction of the diaper 1 (the lower edge in FIG. 5) that is parallel to the edge on the abdominal side opposite the crotch side in the longitudinal direction of the diaper 1 (the upper edge in FIG. 5). Therefore, the length LF of the front patch 2F is constant at any position in the left-right direction of the diaper 1.

[0045] In the diaper 1 of this embodiment, the front patch 2F is formed, or the tapes 2L1 and 2L2 are arranged in the back body region 1R, so that the length LF is shorter than the length L1. More specifically, the length LF may be the length L1 minus the width LT of the mechanical fastener 16 of the tape 2L1. Thus, the length LF is approximately equal to the length L2. When the length LF is approximately equal to the length L2, the mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 can be attached to each other close to each other on the front patch 2F when the diaper 1 is worn.

[0046] Furthermore, in the diaper 1 of this embodiment, the length L3 is 30 mm or more. By arranging the tapes 2L1 and 2L2 at a distance from each other, the tapes 2L1 and 2L2 can be attached to the front patch 2F so that the pulling directions of the tapes 2L1 and 2L2 intersect. This allows the tapes 2L1 and 2L2 to be attached to the front patch 2F so as to sandwich the wearer's ilium from above and below. Furthermore, if the length L3 is 30 mm or less, the range of motion of the tapes 2L1 and 2L2 is narrow. Therefore, the tape 2L1 may not be able to be attached so as to fit along the upper side of the ilium, and the tape 2L2 may have difficulty pulling up the leg gathers 3AL and 3AR, which may prevent the tape 2L1 from adhering closely to the wearer's skin.

[0047] FIG. 6 is an enlarged view of tape 2R1 according to this embodiment. FIG. 6(A) is an enlarged view of tape 2R1 in a state where its widthwise extension length of the diaper 1 is restricted. FIG. 6(A2) is a view of FIG. 6(A) from the cover sheet 4 side. FIG. 6(B) is an enlarged view of tape 2R1 in a state where its widthwise extension length of the diaper 1 is extended. FIG. 6(B2) is a view of FIG. 6(B) from the cover sheet 4 side. Tape 2R1 and tapes 2L1, 2L2, and 2R2 have the same configuration, so the following description focuses on tape 2R1. Tape 2R1 is attached to side sheets 9L and 9R and the cover sheet 4, and extends from 10 mm to 30 mm at the outer edge of the diaper 1 in the width direction. The non-skin-facing side of tape 2R1 is provided with a loop-processed adhesive region 2R (an example of the adhesive region referred to in this application) similar to the non-skin-facing side of the front patch 2F. Therefore, tape 2R1 can be attached to the non-skin facing side of tapes 2L1, 2L2, and 2R2.

[0048] The tape 2R1 has a first folded portion 11 extending linearly in the longitudinal direction and a second folded portion 12 positioned away from the first folded portion 11 toward the center in the width direction (the absorbent body 6 side) and extending linearly in the longitudinal direction. It has.

[0049] The tape 2R1 has a temporary adhesive portion 14 (an example of a "regulating portion" as used herein) that regulates the length of the tape 2R1. The temporary adhesive portion 14 is formed by temporarily bonding the skin-facing side between the first folded portion 11 and the second folded portion 12 and the skin-facing side closer to the center in the width direction than the second folded portion 12 with a hot melt adhesive. Temporary bonding refers to a state in which the bonded materials are bonded to such an extent that they can be peeled apart without tearing. The tensile strength of the temporary adhesive portion 14 is 3N or more and 10N or less. By providing the temporary adhesive portion 14 on the tape 2R1, it is possible to regulate the extension length of the tape 2R1 as shown in FIG. 6(A). It is also possible to use the tape 2R1 by releasing the temporary adhesive of the temporary adhesive portion 14 as shown in FIG. 6(B). In Fig. 6(B), the overlapping area between the skin-facing side of the first folded portion 11 and the second folded portion 12 and the skin-facing side closer to the widthwise center than the second folded portion 12 is indicated by hatching slanting downward to the right, and the area where the hot melt adhesive is applied is indicated by hatching slanting downward to the left. Also, in Fig. 6(B), the temporary adhesive portion 14 is formed by temporarily adhering adjacent areas in the widthwise direction of the diaper 1 around the second folded portion 12. However, it may also be formed by temporarily adhering areas spaced apart in the widthwise direction of the diaper 1 around the second folded portion 12, or by temporarily adhering the skin-facing side of the cover sheet 4 and the skin-facing side of the tape 2R1. Depending on the wearer's body shape, the tapes 2L1, 2L2, 2R1, and 2R2 used to secure the diaper 1 may be applied in an overlapping manner. By providing temporary adhesive portions 14 on tapes 2L1, 2L2, 2R1, and 2R2 and releasing the temporary adhesive of temporary adhesive portions 14, the length of tapes 2L1, 2L2, 2R1, and 2R2 that are attached to the upper thickness side (non-skin side) of the overlapping tapes 2L1, 2L2, 2R1, and 2R2 can be adjusted to a length that allows them to be attached to the front patch 2F.

[0050] The temporary adhesive portion 14, which is formed by temporarily adhering the skin-facing side between the first folded portion 11 and the second folded portion 12 and the skin-facing side closer to the center in the width direction than the second folded portion 12, is formed so as to protrude toward the side not facing the wearer's skin. When the diaper 1 is used with the temporary adhesive portion 14 temporarily adhered, the temporary adhesive portion 14 is provided so as to protrude toward the side not facing the wearer's skin, so that the temporary adhesive portion 14 does not come into direct contact with the wearer's skin. This prevents the temporary adhesive portion 14 from pressing against and compressing the wearer's ilium and skin when the diaper 1 is worn.

[0051] The temporary adhesive portions 14 are formed so as to overlap the cover sheet 4 of the diaper 1 in the thickness direction. When the diaper 1 is used with the temporary adhesive portions 14 temporarily attached, the temporary adhesive portions 14 are provided so as to overlap the cover sheet 4 in the thickness direction so as to be convex on the side facing away from the wearer's skin. This prevents the cover sheet 4 from being separated from the wearer's skin, and prevents the cover sheet 4 or the edges of the cover sheet 4 from pressing against and compressing the wearer's ilium or skin when the diaper 1 is worn.

[0052] The temporary adhesive portions 14 have adhesive lines 13. The adhesive lines 13 are areas where adhesive is applied to temporarily adhere the temporary adhesive portions 14, and two adhesive lines 13 are provided linearly spaced apart in the longitudinal direction in each temporary adhesive portion 14. The two adhesive lines 13 provided in each temporary adhesive portion 14 can be temporarily adhered by one adhesive line 13, and the extension length of the tape 2R1 can be controlled in two stages. Furthermore, even if the temporary adhesion of one adhesive line 13 is peeled off due to an unexpected force, the other adhesive line 13 can maintain the temporary adhesion state. This prevents the diaper 1 from slipping down due to the abdominal circumference of the diaper 1 suddenly becoming longer than the abdominal circumference of the wearer.

[0053] FIG. 6(C) is a diagram showing an example of the folding of the tape 2R1 when the diaper 1 is in a distributed state. FIG. 6(C2) is a view of FIG. 6(C) from the cover sheet 4 side. FIG. 6(D) is a view of FIG. 6(D) as viewed from the cover sheet 4 side. The tape 2R1 has a third fold 15 which is located closer to the outer end of the tape 2R1 than the midpoint between the first fold 11 and the outer end of the tape 2R1 in the width direction and extends linearly in the longitudinal direction. From the time of product manufacture to the time of product distribution, In this state, the diaper 1 is folded along the third fold 15 so that the mechanical fastener 16 faces inward. Folding the mechanical fastener 16 so that the mechanical fastener 16 faces inward prevents the mechanical fastener 16 from being exposed to the outside and from adhering to other products. Furthermore, when the diaper 1 is folded along the third fold 15, the outer widthwise edge of the tape 2R1 is positioned at an outer widthwise edge than the first fold 11. Therefore, when putting on the diaper 1, the fold formed along the third fold 15 can be unfolded to expose the mechanical fastener 16 to the outside, and at the same time, the temporary adhesive of the temporary adhesive portion 14 can be prevented from being released.

[0054] Tape-type disposable diapers are secured to the wearer's body by encircling the wearer's abdomen and thighs, allowing the wearer to freely change positions while wearing the diaper. However, because the diaper is secured to the wearer's body by encircling the abdomen, depending on the wearer's body shape, the tape attachment positions of the tapes 2L1, 2L2, 2R1, and 2R2 that secure the diaper 1 may need to be shifted from the ideal attachment positions that secure the diaper 1 to the waist without overlapping the tapes, and without placing strain on the body. By providing detachable attachment regions 2R on the non-skin-facing sides of the tapes 2L1, 2L2, 2R1, and 2R2, the tapes can be overlapped in the thickness direction. This allows the diaper 1 to be secured to the wearer's body shape without shifting the attachment positions of the tapes 2L1, 2L2, 2R1, and 2R2 from the ideal attachment positions. However, if the tape attached to the upper side in the thickness direction is not attached to the front patch 2F, the tape attached to the upper side in the thickness direction will move in accordance with the tape attached to the lower side in the thickness direction due to the wearer's movements or contraction of the diaper 1 caused by an increase in the wearer's abdominal circumference, which may cause misalignment between the tapes, resulting in the risk of the upper tape being peeled off.

[0055] On the other hand, the present invention according to the present embodiment is provided with a temporary adhesive portion 14 that restricts the extending length of the tape, so even when it is necessary to attach one tape to the region 2R to which the other tape is to be attached, the temporary adhesive portion 14 can be released from the temporary adhesive and the extending length of the tape can be extended, so that the one tape is attached not only to the region 2R to which the other tape is to be attached but also to the front patch 2F. Therefore, the tape attached to the upper side in the thickness direction is also directly attached to the waist, so peeling of the tape can be prevented.

[0056] Figure 6(C) shows an example of how the tape 2R1 is folded when the diaper 1 is distributed. The tape 2R1 is used in the form shown in Figures 6(A) and 6(B), but is folded when shipped and when distributed. By folding the tape 2R1 when it is unused, it is possible to prevent the mechanical fastener 16 from being exposed to the outside and from adhering to other products.

[0057] More specifically, the tape 2R1 in its distribution state is packaged in a state in which the mechanical fastener 16 folded along the third fold 15 is in contact with the skin-facing side of the diaper 1, as shown in Figure 6(C). At this time, the tip of the folded portion of the mechanical fastener 16 does not overlap with the temporary adhesive portion 14. If the tip of the folded portion of the mechanical fastener 16 does not overlap with the temporary adhesive portion 14, it is possible to prevent the temporary adhesive portion 14 from being released at the same time as the fold formed along the third fold 15 of the mechanical fastener 16 is unfolded during the operation of putting on the diaper 1.

[0058] When using the diaper 1, as shown in Figure 6(D), the tape 2R1 is unfolded so that the mechanical fastener 16 faces the skin, and as shown in Figure 6(A), the fold formed along the third fold 15 is unfolded, and the diaper is worn in the unfolded state, adjusting it to the appropriate wearing position. The appropriate wearing position is a position where the crotch part of the diaper 1 coincides with the crotch part of the wearer, and the widthwise center of the diaper 1 coincides with the wearer's midline. The proper positioning can be achieved by aligning the center mark CM or the like marked on the diaper 1 with the wearer's midline, or by visually checking the front, back, left and right of the diaper 1 and the wearer. At this time, the diaper 1 shown in Figure 6(A) As can be seen, the temporary adhesive portion 14 is in a temporary adhesive state.

[0059] Depending on the wearer's body shape, the tapes 2L1, 2L2, 2R1, and 2R2 may need to be overlapped and adhered to the diaper 1 in the appropriate position. In this case, as shown in FIG. 6(B), the extension length of the tapes 2L1, 2L2, 2R1, and 2R2 can be extended by releasing the adhesive lines 13 provided on the temporary adhesive portions 14 of the tapes 2L1, 2L2, 2R1, and 2R2. Therefore, at least a portion of the tapes 2L1, 2L2, 2R1, and 2R2 overlapped on the upper (non-skin-facing) side in the thickness direction can be extended to a length that allows them to be adhered to the front patch 2F. The adhesive lines 13 may be released as many times as necessary. By releasing the adhesive lines 13 as necessary to fit the diaper 1, the length of the diaper 1 can be fine-tuned to fit the abdominal circumference, allowing the diaper 1 to be worn in a more appropriate position.

[0060] FIG. 7 is an enlarged view of tape 2R1 and tape 2R2 when the tape is attached after the temporary adhesive portion 14 is released. FIG. 7(A) shows the state of tape 2R1 and tape 2R2 attached when the temporary adhesive portion 14 is not released. FIG. 7(B) shows the state of tape 2R1 and tape 2R2 attached when the temporary adhesive portion 14 of tape 2R1 is released. In the state shown in FIG. 7(A), the mechanical fastener 16 of tape 2R1 is attached to the attachment region 2R of tape 2R2, but is not attached to the front patch 2F. Therefore, as the wearer moves or the abdominal circumference increases, there is a possibility that the tape 2R1 and tape 2R2 may become misaligned, resulting in the tape 2R2 peeling off. Therefore, as shown in FIG. 7(B), the temporary adhesive portion 14 of tape 2R1 is released, and tape 2R1 is attached to the front patch 2F. Because tape 2R1 and tape 2R2 are attached to the front patch 2F, peeling of tape 2R1 can be prevented.

[0061] Figure 8 shows the state in which tape 2R1 is attached to the front patch 2F during the donning process. When donning a diaper 1 to a wearer, the crotch region 1B of the diaper 1 is placed under the wearer's crotch, the front body region 1F of the diaper 1 is placed on the wearer's ventral side, and the back body region 1R of the diaper 1 is placed on the wearer's dorsal side. Then, as shown in Figure 8(A), tape 2L1 is routed from the dorsal side to the ventral side near the wearer's left waist along the upper side of the wearer's ilium, and tape 2L2 is routed from the dorsal side to the ventral side along the lower side of the wearer's ilium. Furthermore, tape 2R1 is routed from the dorsal side to the ventral side near the wearer's right waist along the upper side of the wearer's ilium, and tape 2R2 is routed from the dorsal side to the ventral side along the lower side of the wearer's ilium. Then, as shown in Fig. 8(B), the tapes 2L1, 2L2, 2R1, and 2R2 are pulled toward the center of the front patch 2F so that the diaper 1 fits snugly around the wearer's crotch and waist. Then, as shown in Fig. 8(C), the tapes 2L1, 2L2, 2R1, and 2R2 are attached to the front patch 2F. When the tapes 2L1, 2L2 and the tapes 2R1, 2R2 are attached to the front patch 2F so as to sandwich the upper and lower ilium, the diaper 1 is securely attached to the wearer and is prevented from slipping off.

[0062] Fig. 9 is an enlarged view showing the state of application of the diaper 1 according to this embodiment. Fig. 9(A) shows the state in which the tape 2L1 and the tape 2L2 are pulled in a direction that intersects. Fig. 9(B) shows the state in which the tape 2L1 and the tape 2L2 are pulled in a direction that slightly intersects. Fig. 9(C) shows the state in which the tape 2L1 and the tape 2L2 are pulled in a direction that is parallel to each other.

[0063] In the diaper 1 of this embodiment, the length LF is substantially the same as the length L2. Therefore, when the tapes 2L1 and 2L2 are attached to the front patch 2F while being pulled toward the center of the front patch 2F so that the diaper 1 fits properly around the wearer's crotch and waist, the tape 2L1 and the tape 2L2 are attached in a manner such that the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 intersect. This is because if tape 2L1 and tape 2L2 are pulled in parallel directions when they are attached to the front patch 2F, the mechanical fastener 16 of tape 2L1 or the mechanical fastener 16 of tape 2L2 will be positioned in a part other than the front patch 2F.

[0064] When the diaper 1 of this embodiment is attached to the front patch 2F with the pulling directions of tape 2L1 and tape 2L2 parallel, the mechanical fastener 16 of tape 2L1 or the mechanical fastener 16 of tape 2L2 protrudes from the front patch 2F, as shown in FIG. 9(C). Therefore, during the diaper putting operation, an attachment method is employed in which the pulling directions of tape 2L1 and tape 2L2 intersect. Furthermore, as described above, the length LF is longer than the length L3 and is the length L1 minus the width LT of the mechanical fastener 16 of tape 2L1. Therefore, even when the diapers are attached in the state shown in FIG. 9(C), i.e., with the pulling directions of tape 2L1 and tape 2L2 parallel to each other, at least the area of ​​the mechanical fastener 16 of either tape 2L1 or tape 2L2 can be attached to the front patch 2F. Therefore, even when the diaper 1 is attached in the state shown in Figure 9(C), the tapes 2L1, 2L2, 2R1, and 2R2 can each ensure the minimum adhesive strength required to keep the diaper 1 attached.

[0065] The mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 are attached close to each other on the front patch 2F, allowing for overlapping or cross-over application of the tapes, improving fit. Furthermore, when overlapping tapes, the temporary adhesive portion 14 on the upper (non-skin-facing) tape is released and attached to the front patch 2F, improving fit and preventing tape peeling caused by misalignment between the tapes.

[0066] As described above, the diaper 1 according to this embodiment includes two pairs of tapes 2L1, 2L2, 2R1, and 2R2, each of which has a mechanical fastener 16 folded inward and attachable to a front patch 2F provided in the front body region 1F at the outer widthwise end, and each of the two pairs of tapes 2L1, 2L2, 2R1, and 2R2 has a temporary adhesive portion 14 temporarily attached thereto with an adhesive. When putting on the diaper 1, the mechanical fastener 16 is unfolded, and the two pairs of tapes 2L1, 2L2, 2R1, and 2R2 are attached to the wearer's ilium so that they are aligned with the wearer's ilium. When tapes 2L1, 2L2 or tapes 2R1, 2R2 adjacent to each other in the longitudinal direction of the diaper 1 are overlapped, at least a portion of the tapes 2L1, 2L2, 2R1, 2R2 can be attached to the front patch 2F by releasing the adhesive lines 13 provided on the temporary adhesive portions 14 of the tapes 2L1, 2L2, 2R1, 2R2, thereby preventing the tapes from slipping apart when the tapes are overlapped. This prevents the tapes from peeling off due to the misalignment that occurs when the tapes are overlapped, and allows the tapes to be properly fixed to the wearer.

[0067] <Test> The adhesive strength of the tape 2L1 to the front patch 2F increases as the adhesive strength per unit area increases. Therefore, even if the tape 2L1 is attached in a state where it protrudes from the front patch 2F, the adhesive strength per unit area can be sufficient to keep the diaper 1 in a worn state. For example, if the adhesive strength when half of the mechanical fastener 16 of the tape 2L1 is attached to the front patch 2F is 2.5 N or more in a 90-degree peel test, the diaper 1 can be kept in a worn state. For example, if the adhesive strength when half of the mechanical fastener 16 of the tape 2L1 is attached to the front patch 2F is 2.5 N or more in a 90-degree peel test, the entire tape 2L1 and 2L2 can be kept in a worn state when half of the mechanical fastener 16 of the tape 2L1 is attached to the front patch 2F and half of the mechanical fastener 16 of the tape 2L2 is attached to the front patch 2F. The adhesive strength to the body is 5.0 N or more in a 90-degree peel test. Under normal diaper use conditions, there is almost no force pulling the tape in a 90-degree direction from the surface of the front patch, and even if a finger or other object accidentally touches the tape, a force of about 0 to 2 N is applied. Therefore, within the range of normal use conditions, the diaper 1 can be kept in place even if it is attached in the state shown in Figure 9(C).

[0068] The 90-degree peel test in this embodiment conforms to the test specified by JIS, and specifically includes the following test content.

[0069] That is, the sheet to which the tape is adhered is cut out so that about 50 mm of the sheet remains from the base end of the tape. This completes the tape with a small piece of the cut-out sheet remaining at the base end. The edges of this small piece of sheet are reinforced with cellophane tape and a hole is punched. Next, the front patch attached to the exterior surface is cut out to the specified size from the exterior surface together with the sheet that forms the exterior surface. The pulp, SAP, back sheet, etc. are removed so that only the cover sheet remains on the cut-out front patch. This is then attached to an acrylic plate with adhesive tape. This completes the preparation of the test specimen.

[0070] Next, the tape of the test specimen is attached to the front patch of the same test specimen. The tape is attached to the front patch by moving a 2 kg rubber roller back and forth at a specified speed. After that, a load is applied in the surface direction between the front patch and the tape using a weight of a specified weight, and the test specimen is then set in a tensile tester (Strograph). The tape is then pulled in a direction 90 degrees to the surface direction of the front patch using the tensile tester, and the average tensile load is measured from the start of peeling until the tape is separated from the front patch.

[0071] The test details of the 90-degree peel test in this embodiment are as described above.

[0072] As described above, the diaper 1 of this embodiment allows the tape 2L1 and the tape 2L2 to be attached to the front patch 2F in an unintentionally cross-wise manner when pulled, thereby enabling overlapping or cross-applying of the tapes, thereby improving wearability. Furthermore, in the case of overlapping, the temporary adhesive portion 14 on the upper tape (non-skin-facing side) is released and the tape is attached to the front patch 2F, thereby improving wearability and preventing tape peeling caused by misalignment between the tapes.

[0073] This effect is not limited to the case where the length LF is approximately the same as the length L2. It can be achieved as long as the length LF is shorter than the length L1. Therefore, the length LF of the diaper 1 may be shorter than the length L1, and may be longer or shorter than the length L2. Furthermore, the length LF of the diaper 1 may be, for example, the length L1 minus two or fewer widths LT.

[0074] <Experiment> Next, an experiment was conducted to verify the suitable tensile strength of the temporary adhesive portion 14. While it is desirable that the temporary adhesive portion 14 has a strength that can withstand abdominal expansion and forces acting on the diaper 1 when worn, if the strength of the temporary adhesive is too strong, there is a risk that the temporary adhesive portion 14 provided on the skin-facing side of the tape 2R1 will become frayed, making the diaper 1 less comfortable against the skin. Therefore, an experiment was conducted to verify the suitable tensile strength of the temporary adhesive portion 14 of the diaper 1. In the experiment, diapers equipped with tapes with varying tensile strengths of the temporary adhesive were used. The wearer was asked to wear the diaper without releasing the temporary adhesive at the temporary adhesive portion, and visually confirmed whether the temporary adhesive had been released during the putting-on operation or when the diaper was worn. After that, the temporary adhesive at the temporary adhesive portion was released, and visually checked whether the temporary adhesive at the temporary adhesive portion had become frayed. I confirmed this.

[0075] Figure 10 is a table showing the experimental results. In this experiment, 11 diapers were created with tapes having different tensile strengths at the temporary adhesive joints. Prototype 1 had a tensile strength of 1N at the temporary adhesive joint. Prototype 2 had a tensile strength of 2N at the temporary adhesive joint. Prototype 3 had a tensile strength of 3N at the temporary adhesive joint. Prototype 4 had a tensile strength of 4N at the temporary adhesive joint. Prototype 5 had a tensile strength of 5N at the temporary adhesive joint. Prototype 6 had a tensile strength of 6N at the temporary adhesive joint. Prototype 7 had a tensile strength of 7N at the temporary adhesive joint. Prototype 8 had a tensile strength of 8N at the temporary adhesive joint. Prototype 9 had a tensile strength of 9N at the temporary adhesive joint. Prototype 10 had a tensile strength of 10N at the temporary adhesive joint. Prototype 11 had a tensile strength of 11N at the temporary adhesive joint.

[0076] The "Temporary Adhesion Release" column in Figure 10 shows the results of an experiment verifying whether the temporary adhesive bond maintained its temporary adhesive state during diaper donning and during wear, including breathing, walking, and other movements. An "X" indicates cases where the temporary adhesive bond did not maintain its temporary adhesive state during diaper donning or wear, while an "O" indicates cases where the temporary adhesive bond maintained its temporary adhesive state during diaper donning or wear. This indicates that maintaining the temporary adhesive bond during diaper donning or wear can prevent the temporary adhesive bond from accidentally releasing and regulate the tape length. The experimental results showed that the temporary adhesive bond in Prototypes 1 and 2 released during donning or wear, while the temporary adhesive bond in Prototypes 3 to 11 maintained its temporary adhesive state during donning or wear. Therefore, it is believed that the temporary adhesive bond maintained its temporary adhesive state during donning or wear when the diaper is being worn if the tensile strength of the temporary adhesive bond is 3 N or greater.

[0077] The "Fluffing of Temporary Bonded Joints" column in Figure 10 shows the results of checking whether or not the temporary bonded joints were frayed when the adhesive lines of the temporary bonded joints were released. In the table in Figure 10, if fraying occurred at the temporary bonded joints when the temporary bonded joints were released, an "X" is indicated, and if fraying did not occur at the temporary bonded joints when the temporary bonded joints were released, an "O" is indicated. If fraying occurred at the temporary bonded joints when the temporary bonded joints were released, this indicates that the temporary bonded joints felt uncomfortable against the skin and reduced comfort. The experimental results showed that prototypes 1 to 10 did not experience fraying at the temporary bonded joints, while only prototype 11 experienced fraying at the temporary bonded joints. Therefore, if the tensile strength of the temporary bonded joints is 10 N or less, it is thought that fraying at the temporary bonded joints will not reduce comfort for the wearer when the temporary bonded joints are released and the tape length is extended.

[0078] Judging from the above experiments comprehensively, the tensile strength of the temporary adhesive joint 14 is preferably 3N or more, and more preferably 10N or less.

[0079] If the diaper 1 has a tensile strength of the temporary adhesive portion 14 within the above range, the temporary adhesive portion 14 restricts the widthwise extension length of the diaper 1, allowing the wearer to wear the diaper in an appropriate position without compromising the wearing comfort.

[0080] <Modification> Next, a diaper according to a modification of this embodiment will be described. Fig. 11 is a diagram illustrating an example of a mark provided on a front patch 2F according to the modification. The diaper 1 of this modification employs a method of attachment in which the direction of pulling tape 2L1 and the direction of pulling tape 2L2 intersect by forming the front patch 2F so that the length LF is shorter than the length L1. In this modification, to ensure that such an attachment method is employed, a mark is provided on the front patch 2F as an attachment target for visually aligning the direction of pulling tape 2L1 and the direction of pulling tape 2L2. Examples of such attachment target marks include the following: Examples include:

[0081] FIG. 11(A) illustrates an example of diagonal grid lines composed of multiple parallel lines sloping to the right when viewed from the front of the front patch 2F and multiple parallel lines sloping to the left when viewed from the front of the front patch 2F. If a line sloping to the left when viewed from the front of the front patch 2F is printed on the front patch 2F, the wearer will tend to pull tape 2L1 along this line when wearing the front patch 2F. Also, if a line sloping to the right when viewed from the front of the front patch 2F is printed on the front patch 2F, the wearer will tend to pull tape 2L2 along this line when wearing the front patch 2F. The same is true for the tapes on the wearer's right side, i.e., tapes 2R1 and 2R2. Therefore, if such application target indications are provided on the front patch 2F, the wearer will visually try to intersect the direction of pulling tape 2L1 with the direction of pulling tape 2L2 when wearing the front patch 2F. As a result, compared to the above embodiment, it is possible to more reliably adopt a sticking method in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other.

[0082] 11(A) shows grid lines with an inclination angle of 45 degrees in consideration of aesthetics. However, the grid lines displayed as attachment targets are not limited to those with an inclination angle of 45 degrees. The grid lines displayed as attachment targets may have an inclination angle of, for example, about 30 to 60 degrees, about 20 to 70 degrees, or about 10 to 80 degrees.

[0083] Next, Figure 11(B) shows an example in which the intersections of diagonal grid lines are highlighted. When such highlighted intersections are provided on the grid lines, the person donning the front patch 2F can more clearly visually recognize the grid lines indicated on the patch 2F as the application target. As a result, compared to the above embodiment, it is possible to more reliably apply the tape 2L1 and tape 2L2 in a crosswise direction.

[0084] 11(B), black circles are shown as intersections, but the intersections are not limited to this form. Instead of black circles, the intersections where grid lines intersect may be marked with, for example, letters such as numbers or symbols, animated characters, or various other designs.

[0085] Next, FIG. 11(C) illustrates an example of an attachment direction indicator configured with an arrow inclined to the right when viewed from the front of the front patch 2F and an arrow inclined to the left when viewed from the front of the front patch 2F. If an arrow inclined to the left when viewed from the front of the front patch 2F is printed on the front patch 2F, the person wearing the front patch 2F may try to pull tape 2L1 along the arrow. Also, if an arrow inclined to the right when viewed from the front of the front patch 2F is printed on the front patch 2F, the person wearing the front patch 2F may try to pull tape 2L2 along the arrow. The same applies to the tapes on the wearer's right side, i.e., tapes 2R1 and 2R2. Therefore, if such an indicator is provided on the front patch 2F as an attachment target, the person wearing the front patch 2F may visually cross the direction in which to pull tape 2L1 and the direction in which to pull tape 2L2. As a result, compared to the above embodiment, it is possible to more reliably adopt a sticking method in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other.

[0086] In addition, the same markings as the grid lines and the markings of the adhering direction as described above may be provided on the non-adhered surfaces of the tapes 2L1, 2L2, 2R1, 2R2. For example, when the non-adhered surfaces of the tapes 2L1, 2L2, 2R1, 2R2 are attached to the front patch 2F in an attachment method in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 intersect, the markings on the non-adhered surfaces of the tapes 2L1, 2L2, 2R1, 2R2 should be aligned in design with the markings on the front patch 2F without creating a sense of incongruity. If provided, tapes 2L1, 2L2, 2R1, and 2R2 are applied so that the patterns are aligned during the installation work. Therefore, it is possible to more reliably adopt an application method in which the pulling direction of tape 2L1 and the pulling direction of tape 2L2 cross each other.

[0087] <Other embodiments> In this embodiment, tapes 2L1, 2L2, 2R1, and 2R2 are formed from a different material from that of front body region 1F and back body region 1R, but tapes may be formed by extending widthwise outward from the material forming front body region 1F or back body region 1R. In this case, mechanical fasteners 16 are provided at the widthwise outer edges of front body region 1F and back body region 1R.

[0088] In this embodiment, the mechanical fastener 16 is provided in the back body region 1R and the front patch 2F is provided in the front body region 1F, but the mechanical fastener 16 may be provided in the front body region 1F and the front patch 2F in the back body region 1R.

[0089] In addition, in this embodiment, a mechanical fastener 16 is used for the adhesive portion, and a front patch 2F that can repeatedly engage with the mechanical fastener 16 is used for the adhered portion, but the adhesive portion may be coated with an adhesive having adhesive strength, and the adhered portion may be made to be capable of being repeatedly adhered by the adhesive strength of the adhesive portion.

[0090] Alternatively, the SAP particles may be unevenly distributed in either the upper absorbent mat 6A or the lower absorbent mat 6B of the absorbent core 6C. For example, SAP particles may be distributed only in the upper absorbent mat 6A, but not in the lower absorbent mat 6B. In this case, the lower absorbent mat 6B is made of short fibers only, and serves to retain and diffuse the discharged liquid and prevent it from flowing back in until it is absorbed by the SAP particles contained in the upper absorbent mat 6A.

[0091] Furthermore, as shown in FIG. 5, the front patch 2F of this embodiment has an outer shape in which the edge on the crotch side in the longitudinal direction of the diaper 1 (the lower edge in FIG. 5) and the edge on the abdominal side opposite the crotch side in the longitudinal direction of the diaper 1 (the upper edge in FIG. 5) each have a U-shaped recess toward the crotch side. The reason for the U-shaped edge on the abdominal side is to conform to the general shape of the abdomen, which generally protrudes relatively forward around the waist. However, the front patch 2F is not limited to this shape. The front patch 2F may have parallel edges at both ends in the longitudinal direction of the diaper 1. For example, the front patch 2F may have parallel straight edges, parallel V-shaped edges, or parallel wavy edges at both ends in the longitudinal direction of the diaper.

[0092] Furthermore, the diaper 1 is not limited to having two tapes on each side of the width of the diaper 1. The diaper 1 may have three or more tapes on each side of the width of the diaper 1. The diaper 1 may also have tapes of different widths combined together.

[0093] In the above embodiment, the mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 are trapezoidal. However, the attached portions may have other shapes. In the above embodiment, for such non-rectangular mechanical fasteners 16, the length LT is defined as the dimension of the narrowest portion in the longitudinal direction of the diaper 1, and the positional relationship between the mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 and the front patch 2F is described. However, in the above embodiment, these positional relationships are intended to unavoidably adopt an attachment method in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 intersect. Therefore, the length LT may be defined as the dimension of the widest portion of the mechanical fastener 16 in the longitudinal direction of the diaper 1. Alternatively, the length LT may be defined as the dimension of the free end of the tape of the mechanical fastener 16 in the longitudinal direction of the diaper 1. It may also be defined as the dimension along a direction.

[0094] Although the temporary adhesive portion 14 in this embodiment is temporarily attached so as to be convex on the non-skin side, it may also be temporarily attached so as to be convex on the skin side.

[0095] In this embodiment, the tapes 2L1, 2L2, 2R1, and 2R2 each have an adhesive region 2R, but it is sufficient that the adhesive region 2R is provided on at least one of the tapes 2L1, 2L2, 2R1, and 2R2.

[0096] In the present embodiment, it is assumed that adjacent tapes in the longitudinal direction of the diaper 1 are overlapped with each other, but the tapes do not have to be adjacent in the longitudinal direction of the diaper 1.

[0097] The embodiments and modifications thereof disclosed above can be combined with each other. [Explanation of symbols]

[0098] 1. Diapers 1F: Front body area 1B...Inseam area 1R: Back area 2F Front patch 2R･･Area to be pasted 2L1, 2L2, 2R1, 2R2 tape 3W: Waist gather 3AL, 3AR Leg Gather 3L, 3R: 3D gathers 3LL,3RR·Rise line 33L,33R・Fixed part 4. Cover sheet 4KL, 4KR... Constriction 4CL, 4CR, 3BL, 3BR, 4RB, 4LB, 9ER... Elastic thread 5. Back seat 6. Absorber 6C··Absorbent Core 6A··Upper layer absorbent mat 6B Lower layer absorbent mat 7. Core wrap sheet 8. Top sheet 9L, 9R side seats 9LA,9RA·Fixed area 9LB,9RB・Free area 10L,10R・Ear part 6H·Groove 11. First fold 12 Second fold 13...Adhesive line 14 Temporary adhesive part 15 Third fold 16 Mechanical fasteners

Claims

1. A length along a longitudinal direction corresponding to the front-to-back direction of the wearer; A length along a width direction perpendicular to the longitudinal direction; In the front-to-rear direction, a front body region located in front of the wearer, a rear body region located behind the wearer, and a crotch region located between the front body region and the rear body region; a tape provided in one of the front body region or the rear body region, arranged in a plurality of positions spaced apart from each other in the longitudinal direction in at least one of the width directions, extending outward in the width direction, and having an adhesive portion arranged on the wearer's skin side and a regulating portion for regulating an extension length in the width direction; an attachment region provided on a non-skin facing side of at least one of the plurality of tapes, to which the attachment portion of another tape can be attached; and an attachment portion provided on the exterior surface of the other of the front body region or the back body region, to which the attachment portion can be attached. Absorbent articles.

2. Each of the tapes arranged in plurality has an adhesion region on a non-skin side to which the adhesion portion of another tape can be adhered. The absorbent article of claim 1.

3. The regulating portion shortens the extension length in the width direction by temporarily bonding the tapes together. The absorbent article according to claim 1 or 2.

4. The tape extends outward from the end in the width direction of an exterior sheet that forms an exterior surface of at least one of the front body region and the rear body region, The restricting portion overlaps with the exterior sheet when viewed in the thickness direction. The absorbent article according to claim 1 or 2.

5. The restricting portion has a plurality of adhesive lines that are spaced apart from each other in the width direction and extend in the longitudinal direction, The restricting portion is formed by temporarily adhering the tapes to each other by at least one of the adhesive lines. The absorbent article according to claim 1 or 2.

6. The tensile strength of the temporary adhesion in the restricting portion is 3N or more. The absorbent article of claim 5.

7. The tensile strength of the temporary adhesion in the restricting portion is 10 N or less. The absorbent article of claim 5.

8. an extension length of the adhered portion in the longitudinal direction is shorter than a distance between the adhesive portions arranged on each of the plurality of tapes along the longitudinal direction; The absorbent article according to claim 1 or 2.

9. an extension length of the adhered portion in the longitudinal direction is shorter than a distance between the adhesive portions arranged on each of the plurality of tapes along the longitudinal direction by one or less extension lengths of the adhesive portions in the longitudinal direction; The absorbent article of claim 8.

10. an extension length of the adhered portion in the longitudinal direction is shorter than a distance between the adhesive portions arranged on each of the plurality of tapes along the longitudinal direction by not more than two extension lengths of the adhesive portions in the longitudinal direction; The absorbent article of claim 8.

11. The adhesive portions arranged on the plurality of tapes have the same extending length in the longitudinal direction. The absorbent article according to claim 1 or 2.

12. The tape is disposed on each of both sides in the width direction. The absorbent article according to claim 1 or 2.

13. Two tapes are arranged in the longitudinal direction. The absorbent article according to claim 1 or 2.

14. The two tapes arranged in the longitudinal direction are The strength of a 90 degree peel test in a state in which one of the two tapes is attached to the attachment portion is 2.5 N or more; The strength of a 90 degree peel test when both of the two tapes are attached to the attachment portion is 5.0 N or more.

14. The absorbent article of claim 13.

15. The attached portion has an edge on the crotch region side in the longitudinal direction and an edge on the front body region side opposite to the crotch region side in the longitudinal direction that are parallel to each other, and a central portion in the width direction has an outer shape that is U-shaped recessed toward the crotch region side. The absorbent article according to claim 1 or 2.

16. The adherend portion is provided with an adherence target that indicates a diagonal direction with respect to the longitudinal direction. The absorbent article according to claim 1 or 2.

17. The attachment target has a straight line inclined at 45 degrees with respect to the longitudinal direction.

17. The absorbent article of claim 16.

18. The attachment target has grid lines intersecting straight lines inclined with respect to the longitudinal direction.

17. The absorbent article of claim 16.

Images