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; side sheets disposed on a skin surface side on width-direction both sides and extending along the longitudinal direction; a pair of tapes provided in the longitudinal direction, extending outward in the width direction from side sheets, on width-direction both sides of the back body area and each including a sticking part disposed on a skin surface side of the wearer; and a sticking object part provided on an exterior surface of the front body area, whose extension length in the longitudinal direction is same throughout the width direction and is shorter than a distance along the longitudinal direction between the sticking parts disposed on each of the pair of tapes 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 that includes a fastening tape for fixing the absorbent article around the waist. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-201894 A Summary of the Invention [Problem to be solved by the invention]

[0004] The external shape of a person's waist is usually such that the ilium and gluteus maximus muscles protrude. Therefore, in order to wear a tape-type absorbent article so that it fits the external shape of the wearer's waist, the tape needs to be attached at an appropriate attachment position to secure the article to the wearer's body. However, some users of tape-type absorbent articles use the article without knowing the appropriate attachment position of the tape. If the tape is not attached at the appropriate attachment position, there is a risk that the absorbent article will not be properly secured 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; 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; Side sheets are arranged on both skin-facing sides in the width direction and extend along the longitudinal direction; A pair of tapes in the longitudinal direction extending outward from the side sheets in the width direction on both sides of the rear body region in the width direction and having an adhesive portion disposed on the skin surface side of the wearer; the tape is provided on the exterior surface of the front body region, the length of extension in the longitudinal direction is the same across the entire width direction, and the length of extension in the longitudinal direction is shorter than the distance along the longitudinal direction between the adhesive portions arranged on each of the pair of tapes, and the tape is provided on the exterior surface of the front body region, the length of extension in the longitudinal direction being the same across the entire width direction, and the length of extension to which the adhesive portion can be attached is shorter than the distance along the longitudinal direction between the adhesive portions arranged on each of the pair of tapes. Effect of the Invention

[0007] According to the present invention, it is possible to realize an absorbent article that can be appropriately fixed to a wearer. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a diaper according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the diaper according to the embodiment. [Diagram 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. [Diagram 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 in which the tape 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 a state in which the diaper according to the embodiment is attached. [Figure 10] FIG. 10 is a diagram showing an example of a mark provided on a front patch of a diaper according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described. The embodiment described below is one aspect of the present invention, and is not intended to 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 a "diaper") is the direction connecting the front body facing the wearer's abdomen and the rear body facing the back. Between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (at the center in the longitudinal direction), a crotch portion that is disposed under the wearer's crotch (disposed opposite the crotch) is located in a connected manner. In addition, 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 opposite side to the skin-facing side (the outer side when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. In addition, the view from the thickness direction is the plan view. The diaper has a length along the longitudinal direction corresponding to the front-rear direction of the wearer, and a length along the width direction perpendicular to the longitudinal direction. In addition, terms related to directions used in this application refer to directions that correspond to the front, back, left and right of the wearer when the garment is worn. For example, the left and right direction in this application refers to the direction that corresponds to the left and right of the wearer when the garment is worn.

[0011] Fig. 1 is an external perspective view of a diaper 1 according to an embodiment. The diaper 1 has a longitudinal length of 500 mm or more and 1100 mm or less. Such a diaper 1 is suitable for adults. The diaper 1 has a crotch region 1B which corresponds to the crotch covering the pubic area of ​​a wearer when worn, a front body region 1F which is located in front of the crotch region 1B and corresponds to the waist of the wearer's abdomen, and a back body region 1R which is located behind the crotch region 1B and corresponds to the waist of the wearer's back. The left and right edges of the rear body region 1R are provided with a mechanical fastener (an example of an "adhesive portion" in the present application) 16 on the wearer's skin side, a front patch (an example of an "adhered portion" in the present application) 2F provided in the front body region 1F and looped on the non-skin side, and tapes (an example of a "tape" in the present application) 2L1, 2L2, 2R1, 2R2 that can be attached with the mechanical fastener 16 are provided. When the tapes 2L1, 2L2, 2R1, 2R2 are attached to the front patch 2F with the front body region 1F positioned on the wearer's abdomen and the rear body region 1R positioned on the wearer's back, the diaper 1 is fixed to the wearer's body in a state surrounding the wearer's waist circumference and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can freely change his or her body position while wearing the diaper 1. The non-skin facing sides of the tapes 2L1, 2L2, 2R1, and 2R2 are looped in the same manner as the non-skin facing side of the front patch 2F, so that the tapes 2L1, 2L2, 2R1, and 2R2 can be overlapped on the 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 at locations along the wearer's leg circumference (thighs), three-dimensional gathers 3L, 3R are provided on the inner side of the leg gathers 3AL, 3AR in the width direction of the diaper 1, and a waist gather 3W is provided at a location along the wearer's abdominal circumference. The leg gathers 3AL, 3AR, the three-dimensional gathers 3L, 3R and the waist gathers 3W are brought into close contact with the wearer's skin by the elastic force of the elastic members. Therefore, liquid discharged from the wearer is absorbed into the absorbent body 6 without leaking out of the diaper 1. Note that thread-like or strip-like rubber or the like can be appropriately selected as the elastic members.

[0013] Fig. 2 is an exploded perspective view of the diaper 1 according to the embodiment. Fig. 3 is a plan view of the diaper 1 according to the embodiment. In a plan view, the diaper 1 according to the present embodiment has a narrow gourd shape in the crotch region 1B, which is wider toward the front body region 1F and the back body region 1R 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 shuttlecock shape.

[0014] The diaper 1 includes a cover sheet 4 that forms an outer surface when worn. The cover sheet 4 is a sheet-like member having substantially the same planar shape (gourd shape) as the diaper 1 with constrictions 4KL, 4KR at the portions corresponding to the long sides, forming the exterior surface of the diaper 1, and having a rigidity that can withstand friction with clothing, etc., and is provided to reinforce the back sheet 5 described below and to improve the feel. The constrictions 4KL, 4KR are provided at the portions 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, and 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 generally rectangular appearance, and the absorbent body 6 is a mat-like member having a generally gourd-shaped 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 back sheet 5 has a generally rectangular appearance. The back sheet 5 is a sheet formed of a thermoplastic water-impermeable resin such as a polyethylene film in order to suppress leakage of discharged liquid that has flowed into the absorbent body 6. The back sheet 5 has water repellency to prevent urine and moisture from seeping out of the diaper 1 and breathability to prevent the diaper from becoming stuffy when worn. The back sheet 5 may have a large number of minute ventilation holes formed therein to provide breathability.

[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 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 disposed on the skin-facing side when worn. The top sheet 8 is the portion that contacts the wearer's skin when the diaper 1 is worn, and is a water-permeable sheet formed 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, or may be an air-through nonwoven fabric, a point-bonded nonwoven fabric, a spun-bonded nonwoven fabric, or a melt-blown nonwoven fabric.

[0019] An absorbent body 6 for absorbing liquid 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 rear body region 1R. Therefore, when the wearer's private parts are covered with the cover sheet 4 in which the back sheet 5, absorbent body 6, and top sheet 8 are laminated, both ends in the longitudinal direction of the back sheet 5, absorbent body 6, and top sheet 8 are located on the wearer's ventral side and back side. In other words, the wearer's private parts are covered by the absorbent body 6 from the wearer's ventral side to the back side. Therefore, whether the wearer is lying in a supine position or a prone position, the discharged liquid 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 skin-facing sides of the diaper 1 in the width direction and extending along the longitudinal direction. The side sheets 9L, 9R are arranged such 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 sides in the width direction. The fixing regions 9LA, 9RA are bonded to the top sheet 8, absorbent body 6, and back sheet 5, which are components arranged on the non-skin-facing sides, with a hot melt adhesive.

[0022] The side sheets 9L, 9R are bonded to the top sheet 8 with a hot melt adhesive, and the widthwise inner ends of the hot melt adhesive form standing lines 3LL, 3RR (see FIG. 3), and the insides of the standing lines 3LL, 3RR form the upstanding three-dimensional gathers 3L, 3R. The widthwise inner ends 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 fixed in the vicinity of the free regions 9LB, 9RB by the hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The side sheets 9L, 9R are bonded to the top sheet 8 on the widthwise inner side near the longitudinal ends, but the inside of the widthwise side of the hot melt adhesive is not bonded, and can stand up on the skin-facing side. When the elastic threads 3BL, 3BR contract and the three-dimensional gathers 3L, 3R inside the rising lines 3LL, 3RR rise to the skin-facing side, 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 to the outside in the width direction of the three-dimensional gathers 3L, 3R, and suppress side leakage of these substances.

[0023] The entire longitudinal ends of the standing lines 3LL, 3RR of the side sheets 9L, 9R are bonded to the top sheet 8 by a hot melt adhesive to form the fixed parts 33L, 33R. The fixed areas 9LA, 9RA extend to the longitudinal ends of the side sheets 9L, 9R, so that the side sheets 9L, 9R are joined to the top sheet 8 over the entire longitudinal ends. The absorbent body 6 is thick because it is made of a plurality of laminated absorbent mats, and if the fixed parts 33L, 33R are provided at the locations where the absorbent body 6 overlaps, the biasing force of the rubber threads 3BL, 3BR is less likely to be transmitted to the fixed parts 33L, 33R. If the fixed parts 33L, 33R are provided at the locations where the absorbent body 6 does not extend, the fixed parts 33L, 33R can more easily 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 be left unattached to the top sheet 8 even in the fixed portions 33L, 33R. By not adhering the free regions 9LB, 9RB to the top sheet 8, the biasing force of the free regions 9LB, 9RB is gently transmitted over the entire region of the fixed portions 33L, 33R, and it is possible to prevent the biasing force of the rubber threads 3BL, 3BR from concentrating on the longitudinal inward side of the fixed portions 33L, 33R.

[0025] Rubber threads 4LB, 4RB, which are thread-like elastic members, are fixed in a width direction, two for each side, by a hot melt adhesive between the cover sheet 4 and the back sheet 5 on the non-skin facing side of the standing lines 3LL, 3RR in a stretched state in the longitudinal direction of the diaper 1. The rubber threads 4LB, 4RB are elastic members for forming the leg gathers 3AL, 3AR shown in Fig. 1. The number of rubber threads 4LB, 4RB is not limited to two, and may be determined according to the elastic force (contractile force) required for the design of the diaper 1. By disposing the rubber threads 4LB, 4RB in a stretched state, the rubber threads 4LB, 4RB can be contracted to allow the diaper 1 to fit around the legs of the wearer.

[0026] The cover sheet 4 is provided with rubber threads 4CL, 4CR that prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference, and are arranged along the longitudinal direction of the diaper 1 on the inner side in the width direction of the diaper 1 than the rubber threads 4LB, 4RB. The rubber threads 4CL, 4CR are arranged according to the elastic force (contractile force) required in the design of the diaper 1. In this embodiment, three rubber threads 4CL, 4CR are provided.

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

[0028] At both widthwise sides of the rear body region 1R, at the outer ends of the side sheets 9L, 9R, a pair of tapes 2L1, 2L2 are arranged in the longitudinal direction of the diaper 1 and a pair of tapes 2R1, 2R2 are arranged in the longitudinal direction, extending in the widthwise direction. A mechanical fastener 16 is provided on the skin-facing side of the tapes 2L1, 2L2, 2R1, 2R2. The mechanical fastener 16 can be attached onto a front patch 2F provided on the front body region 1F. By attaching the mechanical fastener 16 onto the front patch 2F provided on the front body region 1F, the diaper 1 can be fixed to the wearer's body in a state in which it surrounds the wearer's waist and thighs.

[0029] Furthermore, a rubber thread 9ER for forming a waist gather 3W is provided between the back sheet 5 and the top sheet 8 at a position further toward the back than the end of the absorbent body 6. 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 expansion and contraction, 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 bring the diaper 1 into close contact with 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 the embodiment taken along line AA in Figure 3. In Figure 4, in order to make the internal structure of the diaper 1 easier to understand, each component is illustrated thicker than it actually is, 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, in order to absorb liquids discharged 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 absorbent mat 6A arranged on the top sheet 8 side and a lower absorbent mat 6B arranged on the non-skin facing side. In a plan view, the upper absorbent mat 6A has a gourd shape with the front body region 1F and the back body region 1R being wider than the crotch region 1B and the crotch region 1B is narrowed. When viewed from the top sheet 8 side, the lower absorbent mat 6B is the upper absorbent mat 6A. The upper absorbent mat 6A is disposed below (on the non-skin facing side of) the lower absorbent mat 6B and has a rectangular shape (rectangular shape) whose long sides correspond to the longitudinal direction of the diaper 1 in plan view. The upper absorbent mat 6A and the lower absorbent mat 6B are laminated in the thickness direction so that their respective widthwise centers are approximately aligned. In plan view, the upper absorbent mat 6A is formed to be larger than the lower absorbent mat 6B. The longitudinal direction of the absorbent body 6 coincides with the longitudinal directions of the upper absorbent mat 6A and the lower absorbent mat 6B and the longitudinal direction of the diaper 1.

[0033] The crotch region 1B is sandwiched between the wearer's legs, and thus compressive pressure is applied inward in the width direction. On the other hand, in the front body region 1F and the back body region 1R, the weight of the wearer is applied, and pressure is applied in the thickness direction of the absorbent core 6C. To deal with these pressures, the crotch region 1B of the absorbent core 6C is provided with a constriction. Furthermore, the upper layer absorbent mat 6A and the lower layer absorbent mat 6B are laminated 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 weight is applied, thereby preventing the absorbent core 6C from losing its shape in the thickness direction. For this reason, it is preferable to make the absorbent core 6C approximately gourd-shaped.

[0034] The absorbent core 6C has a structure in which granular absorbent resin (polymeric water absorbent 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 fibers, rayon fibers, or cotton fibers, or short fibers made of 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] The SAP particles of this embodiment refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein includes both a composition consisting of SAP alone and a composition containing SAP as the main component and other substances to such an extent that they do not adversely affect water absorption. Examples of the "other substances" include additives such as surface modifiers added for the purpose of hydrophobizing the particle surface, and unreacted monomers remaining during the synthesis of SAP. The SAP particles can absorb about 10 to 100 times their own weight in liquid. For example, granular SAP particles having a diameter of about 0.1 to 0.5 mm before absorbing liquid may be used.

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

[0037] The absorbent core 6C may have a SAP layer (not shown) formed of a large number of SAP particles, and 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 encases the entire absorbent core 6C, and more specifically, covers the skin-facing side, non-skin-facing side, and side of the absorbent core 6C. The core wrap sheet 7 maintains the shape of the absorbent core 6C when not in contact with discharged liquid, preventing it from losing its shape, and prevents the SAP particles contained in the upper absorbent mat 6A and the SAP particles contained in the SAP layer from escaping. Furthermore, SAP particles that have not absorbed moisture are like hard sand grains, and if the SAP particles that have not absorbed moisture escape from the absorbent body 6 and come into direct contact with the wearer's skin, they may cause the wearer to feel uncomfortable. For this reason, the absorbent core 6C is wrapped in the core wrap sheet 7, This prevents the absorbent core 6C from losing its shape and also prevents 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 of two sheets: an upper core wrap sheet (not shown) disposed between the upper absorbent mat 6A and the top sheet 8, and a lower core wrap sheet (not shown) disposed on the non-skin-facing side of the lower absorbent mat 6B, covering the side of the absorbent core 6C, and further covering the outer side in the width direction of the upper core wrap sheet. When the core wrap sheet 7 is formed of two sheets, the upper core wrap sheet and the lower core wrap sheet may be formed of different materials. As an example, the upper core wrap sheet may be a pulp fiber sheet, and the lower core wrap sheet may be a resin nonwoven fabric. The core wrap sheet 7 may be formed of a single sheet.

[0040] The diaper 1 includes two grooves 6H provided in the absorbent body 6 and formed by squeezing the absorbent body 6 in the thickness direction. The grooves 6H are provided within the longitudinal length of the absorbent core 6C, and the front-rear ends are contained within the absorbent core 6C. The grooves 6H may be formed in a concave shape on the skin side by making the absorbent core 6C have less absorbent material such as short fibers than the other parts, or may be formed by penetrating the absorbent material forming the skin side of the absorbent core 6C in the thickness direction. The grooves 6H in this embodiment are formed in two lines approximately parallel to each other in the width direction around the crotch region 1B so as to extend in the longitudinal direction of the absorbent core 6C, and are formed by squeezing the absorbent core 6C formed of the upper absorbent mat 6A and the lower absorbent mat 6B. The discharged liquid such as urine flows into the grooves 6H, moves longitudinally along the grooves 6H, and is quickly absorbed over a wide longitudinal range of the absorbent body 6. Therefore, the diaper 1 according to this embodiment is provided with the grooves 6H, which allows the discharged liquid to be diffused quickly. Also, as shown in Fig. 3, the grooves 6H do not reach the longitudinal ends of the absorbent body 6. Therefore, the discharged liquid that has moved 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 plan view, the two grooves 6H have a rectangular shape and are formed approximately parallel to each other with the crotch region 1B at the center. The width of the grooves 6H is 2 mm or more and 10 mm or less. The length of the grooves 6H is 150 mm or more and 250 mm or less. A diaper 1 having grooves 6H of this size is suitable for adults (nursing care). The grooves 6H may be formed in a polygonal shape, an elliptical shape, or a rectangular shape with both front and rear ends formed in an arc shape instead of a rectangular shape in 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 widthwise central portion of the absorbent 6 sandwiched between the two grooves 6H rises convexly toward the skin-facing side and comes into contact with the wearer's skin. This makes it easier for the absorbent 6 to come into contact with the urethral opening of the wearer at the raised portion, and the absorbent 6 can effectively absorb and retain urine discharged from the urethral opening.

[0043] In addition, the location of the wearer's excretion hole is limited, and excreted liquid tends to be discharged 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 excreted liquid diffused by the grooves 6H is absorbed in the parts of the absorbent body 6 that have excess holding capacity. The provision of the grooves 6H allows urine to be absorbed by the entire diaper 1, which reduces the frequency with which the diaper 1 needs to be changed.

[0044] FIG. 5 is a diagram showing 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 and 2L2. As shown in FIG. 5, the length of the front patch 2F in the longitudinal direction of the diaper 1 is designated as LF. Also, the length along the longitudinal direction of the diaper 1 that connects the mechanical fasteners 16 arranged on the tapes 2L1 and 2L2 to each other is designated as L1. Also, the mechanical fasteners 16 of the tapes 2L1 and 2L2 have the same length along the longitudinal direction of the diaper 1 as LT (the width of the mechanical fastener 16). Also, the length obtained by subtracting the length LT of the mechanical fastener 16 of the tape 2L1 from the length L1 is designated as L2. Furthermore, the length between the mechanical fastener 16 of tape 2L1 and the mechanical fastener 16 of tape 2L2 is designated 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 an 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 rear 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] In the diaper 1 of this embodiment, the front patch 2F is formed, or the tapes 2L1, 2L2 are arranged in the back body region 1R, so that the length LF is longer than the length L3. Since the length LF is longer than the length L3, even if a wearer who is unfamiliar with overlapping application in which one tape is overlapped and applied to the application region 2R provided on the non-skin-facing side of one tape, or cross application in which tapes are overlapped and applied in a cross shape, applies the tapes 2L1, 2L2 to the front patch 2F so as to be parallel to each other in the extending direction so as not to apply excessive force to the diaper 1, a part of each mechanical fastener 16 will be applied to the front patch 2F.

[0047] In addition, in the diaper 1 of this embodiment, the length L3 is 30 mm or more. By arranging the tape 2L1 and the tape 2L2 apart from each other, the tape 2L1 can be attached to the front patch 2F so that the direction in which the tape 2L1 is pulled crosses the direction in which the tape 2L2 is pulled, and the tapes 2L1 and 2L2 can be attached to the front patch 2F so as to sandwich the wearer's ilium from above and below. In addition, when 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 attached so as to follow the upper side of the ilium, and the tape 2L2 may have difficulty in pulling up the leg gathers 3AL and 3AR, and may not be able to be in close contact with the wearer's skin.

[0048] FIG. 6 is an enlarged view of the tape 2R1 according to this embodiment. FIG. 6(A) is an enlarged view of the tape 2R1 whose extension length in the width direction of the diaper 1 is restricted. FIG. 6(A2) is a view of FIG. 6(A) seen from the cover sheet 4 side. FIG. 6(B) is an enlarged view of the tape 2R1 whose extension length in the width direction of the diaper 1 is extended. FIG. 6(B2) is a view of FIG. 6(B) seen from the cover sheet 4 side. The tape 2R1 and the tapes 2L1, 2L2, and 2R2 have the same configuration, so the following description focuses on the tape 2R1. The tape 2R1 is attached to the side sheets 9L and 9R and the cover sheet 4, and extends to the outer end of the diaper 1 in the width direction within a range of 10 mm to 30 mm. The non-skin-facing side of the tape 2R1 is provided with an adhered region 2R (an example of the adhered region in this application) that is looped in the same manner as the non-skin-facing side of the front patch 2F. Therefore, tape 2R1 is tape 2L1, 2L2 ,It can be applied over the non-skin side of 2R2.

[0049] The tape 2R1 has a first folded portion 11 extending linearly in the longitudinal direction, and a second folded portion 12 located away from the first folded portion 11 toward the widthwise center (the absorbent body 6 side) and extending linearly in the longitudinal direction.

[0050] The tape 2R1 has a temporary adhesive portion (one example of the "regulating portion" in the present application) 14 that regulates the length of the tape 2R1. The temporary adhesive portion 14 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 with a hot melt adhesive. Temporary adhesion refers to a state in which the materials are adhered to such an extent that they can be peeled off without breaking each other. 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 release the temporary adhesion of the temporary adhesive portion 14 and use the tape 2R1 as shown in FIG. 6(B). In Fig. 6(B), the area where the skin-facing side between the first folded portion 11 and the second folded portion 12 overlaps with the skin-facing side closer to the center in the width direction than the second folded portion 12 is shown by hatching from the right down, and the area where the hot melt adhesive is applied is shown by hatching from the left down. In Fig. 5(B), the temporary adhesive portion 14 is formed by temporarily adhering adjacent areas in the width direction of the diaper 1 with the second folded portion 12 as the center. However, it may be formed by temporarily adhering areas spaced apart in the width direction of the diaper 1 with the second folded portion 12 as the center, 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 that fix the diaper 1 may completely overlap each other, and the tape on the upper side in the thickness direction may not be attached to the front patch 2F. A temporary adhesive portion 14 is provided on tapes 2L1, 2L2, 2R1, and 2R2, and by releasing the temporary adhesive of the temporary adhesive portion 14, the length of tapes 2L1, 2L2, 2R1, and 2R2 that are attached to the upper thickness direction 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.

[0051] The temporary adhesive portion 14 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 be convex toward the non-skin-facing side of the wearer. When the diaper 1 is used with the temporary adhesive portion 14 temporarily adhered, the temporary adhesive portion 14 is provided so as to be convex toward the non-skin-facing side of the wearer, so that the temporary adhesive portion 14 does not directly contact the wearer's skin. Therefore, when the diaper 1 is worn, it is possible to prevent the temporary adhesive portion 14 from pressing against and compressing the wearer's ilium and skin.

[0052] The temporary adhesive parts 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 parts 14 temporarily attached, the temporary adhesive parts 14 are provided so as to overlap the cover sheet 4 in the thickness direction so as to be convex on the non-skin side of the wearer. This prevents the cover sheet 4 from being separated from the wearer's skin, and prevents the cover sheet 4 or the ends of the cover sheet 4 from pressing against and compressing the wearer's ilium or skin when the diaper 1 is worn.

[0053] The temporary adhesive portion 14 has an adhesive line 13. The adhesive line 13 is an area where adhesive is applied to temporarily adhere the temporary adhesive portion 14, and two adhesive lines 13 are provided linearly at a distance in the longitudinal direction in one temporary adhesive portion 14. The two adhesive lines 13 provided in the temporary adhesive portion 14 can be temporarily adhered by one adhesive line 13, and the extension length of the tape 2R1 can be regulated in two stages. Even if the temporary adhesion of one adhesive line 13 is peeled off by an unexpected force, the other adhesive line 13 can maintain the state of being temporarily adhered. Therefore, it is possible to prevent the diaper 1 from slipping off due to the abdominal circumference of the diaper 1 suddenly becoming longer than the abdominal circumference of the wearer.

[0054] FIG. 6(C) is a diagram showing an example of how the tape 2R1 is folded when the diaper 1 is in a distributed state. FIG. 6(C2) is a view of FIG. 6(C) seen from the cover sheet 4 side. FIG. 6(D) is a view of the diaper 1 in a distributed state with the tape 2R1 folded and unfolded. FIG. 6(D2) is a view of FIG. 6(D) seen from the cover sheet 4 side. The tape 2R1 has a third fold 15 which is provided on the outer end side of the tape 2R1 from the intermediate position 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 product distribution state, the diaper 1 is folded along the third fold 15 so that the mechanical fastener 16 faces inward. By folding the mechanical fastener 16 faces inward, it is possible to prevent the mechanical fastener 16 from being exposed to the outside and adhering to other products. Furthermore, when folded along the third fold 15, the widthwise outer end of the tape 2R1 is positioned closer to the widthwise outer end 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, while at the same time preventing the temporary adhesion of the temporary adhesive portion 14 from being released.

[0055] A tape-type disposable diaper is fixed to the wearer's body in a state where it surrounds the wearer's abdominal circumference and thighs, so that the wearer can freely change his / her body position while wearing the diaper. Here, the external shape of a human waist is usually a shape where the ilium and gluteus maximus muscles protrude. Therefore, in order to wear the diaper 1 so that it fits the external shape of the wearer's waist, it is necessary to apply the tape at an appropriate application position for fixing the diaper 1 to the wearer's body. However, some users of the diaper 1 may use the diaper without knowing the appropriate application position of the tape. Therefore, some users may not apply the tape at the appropriate application position.

[0056] On the other hand, the present invention according to the present embodiment includes a pair of tapes 2L1, 2L2 and 2R1, 2R2 arranged in the longitudinal direction on both sides of the width of the diaper 1, and a front patch 2F in which the longitudinal length of the diaper 1 is shorter than the longitudinal distance between the mechanical fasteners 16 arranged on each of the pair of tapes 2L1, 2L2 and 2R1, 2R2. Therefore, even if a person who does not know how to apply tapes puts on the diaper 1, the tape 2L1 can be applied to the front patch 2F by unconsciously pulling the tape 2L1 and the tape 2L2 in a crossed direction. Therefore, the diaper 1 can be put on in an ideal state where the diaper 1 fits the shape of the wearer's waist, such as overlapping application in which the other tape is applied to the application area 2R provided on the non-skin side of the tape, or cross application in which the tapes are overlapped and applied crosswise. Therefore, even if the diaper 1 of this embodiment is put on by a user who does not understand the proper way to put it on, the tapes 2L1, 2L2, 2R1, and 2R2 can be attached to the front patch 2F in a state where the diaper 1 fits the shape of the wearer's waist.

[0057] Fig. 6(C) is a diagram showing an example of the folding of the tape 2R1 in the distributed state of the diaper 1. The used state of the tape 2R1 is the form shown in Fig. 6(A) and Fig. 6(B), but it is folded in the product shipping state and distributed state. By folding the tape 2R1 in the unused state, it is possible to prevent the mechanical fastener 16 from being exposed to the outside and from adhering to other products.

[0058] More specifically, the tape 2R1 in a distributed state is packaged with the mechanical fastener 16 folded along the third fold 15 in contact with the skin-facing side of the diaper 1, as shown in Fig. 6(C). At this time, the folded end of the mechanical fastener 16 does not overlap with the temporary adhesive portion 14. Because the folded end of the mechanical fastener 16 does not overlap with the temporary adhesive portion 14, when the diaper 1 is put on, it is possible to avoid the temporary adhesive of the temporary adhesive portion 14 being released at the same time as the fold formed along the third fold 15 of the mechanical fastener 16 is unfolded.

[0059] When the diaper 1 is used, the tape 2R1 is spread so that the mechanical fastener 16 is positioned on the skin-facing side as shown in FIG. 6(D), and the tape 2R1 is folded along the third folded portion 15 as shown in FIG. 6(A). The folded portion is unfolded, and the mechanical fastener 16 is unfolded and the diaper is put on in an appropriate wearing position. The appropriate wearing position is a position where the crotch region 1B of the diaper 1 coincides with the crotch part of the wearer, and the widthwise center of the diaper 1 coincides with the midline of the wearer. The proper alignment may be achieved by aligning a center mark CM or the like marked on the diaper 1 with the midline of the wearer, or by visually confirming the alignment of the diaper 1 with the front, back, left and right of the wearer. At this time, the temporary adhesive portion 14 is in a temporarily adhered state, as shown in FIG. 6(A).

[0060] When the tapes 2L1, 2L2, 2R1, and 2R2 are stuck together, 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 as shown in FIG. 6(B), so that at least a part of the tapes 2L1, 2L2, 2R1, and 2R2 stacked on the upper side (non-skin side) in the thickness direction can be extended to a length that allows the tapes 2L1, 2L2, 2R1, and 2R2 to be stuck to the front patch 2F. The adhesive lines 13 may be released as many as necessary. By releasing the adhesive lines 13 as necessary according to the abdominal circumference, the length of the diaper 1 corresponding to the abdominal circumference can be fine-tuned, and the diaper 1 can be worn in a more appropriate position.

[0061] FIG. 7 is an enlarged view of the tape 2R1 and the tape 2R2 when the tape 2R1 and the tape 2R2 are attached after the temporary adhesive portion 14 is released. FIG. 7(A) is a diagram showing the attached state of the tape 2R1 and the tape 2R2 in a state where the temporary adhesive portion 14 is not released. FIG. 7(B) is a diagram showing the attached state of the tape 2R1 and the tape 2R2 in a state where the temporary adhesive portion 14 of the tape 2R1 is released. In the state of FIG. 7(A), the mechanical fastener 16 of the tape 2R1 is attached to the attached region 2R of the tape 2R2, and is not attached on the front patch 2F. Therefore, with the movement of the wearer or the expansion of the abdominal circumference, there is a possibility that the tape 2R1 and the tape 2R2 are misaligned, and the tape 2R2 is peeled off. Therefore, as shown in FIG. 7(B), the temporary adhesive portion 14 of the tape 2R1 is released, and the tape 2R1 is attached on the front patch 2F. Since the tape 2R1 and the tape 2R2 are attached on the front patch 2F, the peeling of the tape 2R1 can be suppressed.

[0062] Fig. 8 is a diagram showing a state in which the tape 2R1 is attached to the front patch 2F during the putting on operation. When putting on the diaper 1 on a wearer, the crotch region 1B of the diaper 1 is placed under the crotch of the wearer, the front body region 1F of the diaper 1 is placed on the wearer's ventral side, and the rear body region 1R of the diaper 1 is placed on the wearer's back. Then, as shown in Fig. 8(A), the tape 2L1 is routed from the back side to the ventral side near the wearer's left waist so as to follow the upper side of the wearer's ilium, and the tape 2L2 is routed from the back side to the ventral side so as to follow the lower side of the wearer's ilium. Also, the tape 2R1 is routed from the back side to the ventral side near the wearer's right waist so as to follow the upper side of the wearer's ilium, and the tape 2R2 is routed from the back side to the ventral side so as to follow 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 appropriately 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 parts of the ilium, the diaper 1 is stably worn by the wearer and is prevented from slipping off.

[0063] Fig. 9 is an enlarged view of the diaper 1 according to the present embodiment in an attached state. Fig. 9(A) shows an attached state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other. Fig. 9(B) shows an attached state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other slightly. Fig. 9(C) shows an attached state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 are parallel to each other.

[0064] Since the length L2 of the diaper 1 of this embodiment is substantially the same, 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 appropriately around the crotch and waist of the wearer, 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 cross each other. This is because if the tape 2L1 and the tape 2L2 are attached to the front patch 2F in a state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 are parallel, the mechanical fastener 16 of the tape 2L1 or the mechanical fastener 16 of the tape 2L2 will be located in a portion other than the front patch 2F.

[0065] When the diaper 1 of this embodiment is attached to the front patch 2F in a state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 are parallel, the mechanical fastener 16 of the tape 2L1 or the mechanical fastener 16 of the tape 2L2 protrudes from the front patch 2F as shown in FIG. 9(C). Therefore, when the diaper 1 is attached, the mechanical fastener 16 of the tape 2L1 or the mechanical fastener 16 of the tape 2L2 is attached in a state in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other. As described above, the length LF is longer than the length L3 and is the length obtained by subtracting the width LT of the mechanical fastener 16 of the tape 2L1 from the length L1. Therefore, even when the diaper 1 is attached in a state shown in FIG. 9(C), that is, when the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 are parallel to each other, at least the area of ​​the mechanical fastener 16 of either the tape 2L1 or the tape 2L2 can be attached to the front patch 2F. For this reason, even when the diaper 1 is applied in the state shown in Figure 9 (C), the tapes 2L1, 2L2, 2R1, and 2R2 can ensure the minimum adhesion strength required for keeping the diaper 1 worn.

[0066] The mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 are attached close to each other on the front patch 2F, which allows overlapping or cross-attaching and improves fit. In overlapping, the temporary adhesive portion 14 on the upper tape in the thickness direction (non-skin facing side) is released and attached to the front patch 2F, improving fit and preventing the tape from peeling off due to misalignment between the tapes.

[0067] Thus, the diaper 1 according to the present embodiment includes two pairs of tapes 2L1, 2L2, 2R1, and 2R2, which are arranged with the mechanical fastener 16 folded inward and capable of being attached to the front patch 2F provided in the front body region 1F at the widthwise outer end, and each of the two pairs of tapes 2L1, 2L2, 2R1, and 2R2 is provided with a temporary adhesive portion 14 that is temporarily attached with an adhesive. When putting on the diaper 1, the mechanical fastener 16 is deployed, and the two pairs of tapes 2L1, 2L2, 2R1, and 2R2 are attached. At this time, since the front patch 2F has substantially the same length L2, the tape 2L1 can be attached to the front patch 2F by unconsciously pulling the tape 2L1 in a direction that crosses the direction that the tape 2L2 is pulled. This encourages the wearer to put on the diaper in an ideal application state, such as overlapping the tape by applying one tape to the application area 2R on the non-skin side of the tape, or cross application by overlapping the tapes in a cross shape and applying them together, thereby allowing the diaper 1 to be properly fixed on the wearer.

[0068] <Test> The higher the adhesion strength per unit area of ​​the tape 2L1 to the front patch 2F, the stronger the adhesion strength per unit area. Therefore, even if the tape 2L1 is attached in a state where it protrudes from the front patch 2F, the diaper 1 can be sufficiently kept in a worn state depending on the adhesion strength per unit area. For example, if the adhesion 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 adhesion 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. The overall adhesion strength of the tapes 2L1, 2L2 when half of the fastener 16 is attached to the front patch 2F is 5.0 N or more in a 90-degree peel test. Therefore, even if a wearer who is unaware of overlapping or cross-attaching has only half of one mechanical fastener 16 attached to the front patch 2F as shown in Fig. 9(C), the wearer can maintain the diaper 1 in a state that prevents leakage of excreted liquid by the wearer, as long as the diaper is worn within the range of normal usage conditions.

[0069] The 90-degree peel test in this embodiment complies with the test specified by JIS, and specifically, the test contents are as follows.

[0070] That is, the sheet to which the tape is adhered is cut out in such a way 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 a specified size from the exterior surface together with the sheet that forms the exterior surface. Only the cover sheet remains on the cut-out front patch, and the pulp, SAP, back sheet, etc. are removed. This is then attached to an acrylic plate with adhesive tape. This completes the preparation of the test specimen.

[0071] Next, the tape of the test specimen is applied to the front patch of the same test specimen. The tape is applied to the front patch by reciprocating a 2 kg rubber roller 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 set in a tensile tester (Strograph). The tape is then pulled by the tensile tester in a direction 90 degrees to the surface direction of the front patch, and the average tensile load is measured from the start of peeling until the tape is separated from the front patch.

[0072] The test contents of the 90 degree peel test in this embodiment are as described above.

[0073] As described above, according to the diaper 1 of this embodiment, the direction in which tape 2L1 is pulled and the direction in which tape 2L2 is pulled can be unintentionally crossed when the tapes are applied to the front patch 2F, making it possible to apply the tapes by overlapping them together or by cross-applying the tapes by overlapping them together in a cross-like manner, thereby improving fit.

[0074] This effect is not limited to the case where the length LF is substantially 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, for example. The length LF of the diaper 1 may be, for example, the length L1 minus a length equal to or less than two widths LT.

[0075] <Modification> Next, a diaper according to a modification of this embodiment will be described. Fig. 10 is a diagram illustrating an example of a mark provided on the front patch 2F of the diaper according to the modification. The diaper 1 of this embodiment adopts a bonding method in which the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2 cross each other by forming the front patch 2F so that the length LF is shorter than the length L1. In this modification, in order to more reliably adopt such a bonding method, a mark is provided on the front patch 2F as a bonding target for visually crossing the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2. Examples of such a mark for the bonding target include the following.

[0076] FIG. 10(A) shows a front patch 2F having a plurality of parallel straight lines inclined to the right as viewed from the front, and a plurality of parallel straight lines inclined to the left as viewed from the front, Illustrates an oblique lattice line composed of the above. If a straight line inclined to the left as viewed from the front of the front patch 2F is printed on the front patch 2F, the tape 2L1 will be pulled along this straight line during the wearing operation. Also, if a straight line inclined to the right as viewed from the front of the front patch 2F is printed on the front patch 2F, the tape 2L2 will be pulled along this straight line during the wearing operation. The same is true for the tape on the right side of the wearer, that is, the tapes 2R1 and 2R2. Therefore, if such a display of the application target is provided on the front patch 2F, the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2 will be crossed by visual effect during the wearing operation. As a result, it is possible to more reliably adopt an application method in which the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2 cross each other compared to the above embodiment.

[0077] In Fig. 10(A), in consideration of aesthetics, grid lines with an inclination angle of 45 degrees are illustrated. However, the grid lines displayed as the pasting target are not limited to those with an inclination angle of 45 degrees. The grid lines displayed as the pasting target may have an inclination angle of, for example, about 30 to 60 degrees, about 20 to 70 degrees, or about 10 to 80 degrees.

[0078] Next, as shown in FIG. 10(B), an example is shown in which the intersections of the diagonal grid lines are highlighted. If such highlighted intersections are further provided on the grid lines, the person who puts on the front patch 2F can more clearly visually recognize the grid lines of the application target displayed on the front patch 2F. As a result, compared to the above embodiment, it is possible to more reliably adopt an application method in which the pulling direction of the tape 2L1 and the pulling direction of the tape 2L2 cross each other.

[0079] In addition, in Fig. 10(B), black circles are shown as intersections, but the intersections are not limited to this form. Instead of black circles, the intersections where the grid lines intersect may be provided with, for example, letters such as numbers and symbols, animated characters, or other various designs.

[0080] Next, as shown in FIG. 10(C), an example of a sticking direction indication is shown, which is composed of an arrow inclined to the right side as viewed from the front of the front patch 2F and an arrow inclined to the left side as viewed from the front of the front patch 2F. If an arrow inclined to the left side as viewed from the front of the front patch 2F is printed on the front patch 2F, a person who puts on the front patch 2F may try to pull the tape 2L1 along the arrow. Also, if an arrow inclined to the right side as viewed from the front of the front patch 2F is printed on the front patch 2F, a person who puts on the front patch 2F may try to pull the tape 2L2 along the arrow. The same is true for the tape on the right side of the wearer, that is, the tapes 2R1 and 2R2. Therefore, if such an indication is provided on the front patch 2F as a sticking target, a person who puts on the front patch 2F may visually cross the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2. As a result, compared to the above embodiment, it is possible to more reliably adopt a bonding method in which the direction in which the tape 2L1 is pulled and the direction in which the tape 2L2 (2R2) is pulled cross each other.

[0081] In addition, the same markings as the above-mentioned grid lines and the markings of the application direction may be provided on the non-application surfaces of the tapes 2L1, 2L2, 2R1, and 2R2. For example, when the non-application surfaces of the tapes 2L1, 2L2, 2R1, and 2R2 are applied to the front patch 2F by an application method in which the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2 cross each other, the markings on the non-application surfaces of the tapes 2L1, 2L2, 2R1, and 2R2 are arranged so that they match in design without any sense of incongruity with the markings on the front patch 2F. If such markings are provided on the non-application surfaces of the tapes 2L1, 2L2, 2R1, and 2R2, the tapes 2L1, 2L2, 2R1, and 2R2 are applied during the installation work so that the markings match in design. Therefore, it is possible to more reliably adopt an application method in which the direction of pulling the tape 2L1 and the direction of pulling the tape 2L2 cross each other.

[0082] <Other embodiments> In this embodiment, the tape 2R1 is formed of a different material from the front body region 1F and the back body region 1R, but the tape may be extended outward in the width direction from the material forming the front body region 1F or the back body region 1R. In this case, the mechanical fastener 16 is provided at the outer end in the width direction of the front body region 1F or the back body region 1R.

[0083] 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.

[0084] In addition, in this embodiment, a mechanical fastener 16 is used as the adhesive portion, and a front patch 2F that can repeatedly engage with the mechanical fastener 16 is used as the adherend portion, but the adherend portion may be coated with an adhesive having adhesive strength, and the adherend portion may be capable of being repeatedly adhered by the adhesive strength of the adhesive portion.

[0085] 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, the SAP particles are 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 until it is absorbed by the SAP particles contained in the upper absorbent mat 6A.

[0086] In addition, 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 to the crotch side in the longitudinal direction of the diaper 1 (the upper edge in FIG. 5) are each U-shaped and concave toward the crotch side. The reason why the edge on the abdominal side is U-shaped is that it is in accordance with the general shape of the abdomen, which is relatively protruding 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, and may have, for example, straight parallel edges, V-shaped parallel edges, or wavy parallel edges at both ends in the longitudinal direction of the diaper.

[0087] Furthermore, the diaper 1 is not limited to having two tapes arranged on each side in the width direction of the diaper 1. The diaper 1 may have three or more tapes arranged on each side in the width direction of the diaper 1. Furthermore, the diaper 1 may combine tapes of different widths.

[0088] In the above embodiment, the mechanical fasteners 16 of the tapes 2L1, 2L2, 2R1, and 2R2 are trapezoidal. However, the attachment portion may have other shapes. In the above embodiment, the dimension of the portion of such non-rectangular mechanical fasteners 16 at the narrowest position in the longitudinal direction of the diaper 1 is defined as the length LT, 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 direction in which the tape 2L1 is pulled and the direction in which the tape 2L2 is pulled cross each other, so the length LT may be defined as the dimension of the portion of the mechanical fastener 16 at the widest position in the longitudinal direction of the diaper 1. Alternatively, the above length LT may be defined as the dimension of the free end side of the tape of the mechanical fastener 16 along the longitudinal direction of the diaper 1.

[0089] The temporary adhesive portion 14 of this embodiment is temporarily attached so as to be convex on the non-skin side, but The adhesive may be temporarily attached so as to be adhered to the substrate.

[0090] In the diaper 1 of this embodiment, the tapes 2L1, 2L2, 2R1, and 2R2 have the temporary adhesive portion 14, but the tape may not have the temporary adhesive portion 14 and the skin-facing side of the region located on the absorbent body side of the tape (the widthwise center side of the diaper) and the skin-facing side of the cover sheet 4 may be adhered to each other. If the skin-facing side of the region located on the absorbent body side of the tape (the widthwise center side of the diaper) and the skin-facing side of the cover sheet 4 are adhered to each other, the folded portion of the cover sheet 4 will rise in a direction away from the wearer's skin. Since the folded portion of the cover sheet 4 is located on the wearer's ilium, the cover sheet 4 between the tapes 2L1 and 2L2 and between the tapes 2R1 and 2R2 will be separated from the wearer's ilium, and pressure or rubbing against the wearer's ilium and skin can be suppressed.

[0091] In this embodiment, the adhesion region 2R is provided on the non-skin side of the mechanical fastener 16, but the adhesion region 2R may not be provided. The non-skin side of the mechanical fastener 16 may be a nonwoven fabric that is not looped, or may be formed of a material that cannot be repeatedly attached by the mechanical fastener 16. By providing the adhesion region 2R on the non-skin side of the mechanical fastener 16, it is possible to perform overlapping attachment in which tapes are overlapped and attached, or cross attachment in which tapes are overlapped and attached in a cross shape, thereby improving the wearability. However, in overlapping attachment, the mechanical fastener 16 attached to the upper side (non-skin side) in the thickness direction moves in conjunction with the movement of the mechanical fastener 16 attached to the lower side (skin side) in the thickness direction, so that if the lower mechanical fastener 16 comes off, the upper mechanical fastener 16 may also come off. When the mechanical fasteners 16 are attached in an overlapping manner, by releasing the temporary adhesion of one of them, the mechanical fastener 16 can be attached to the front patch 2F without being attached to the attachment region 2R provided on the mechanical fastener 16.

[0092] The embodiments and modifications thereof disclosed above can be combined with each other. [Explanation of symbols]

[0093] 1. Diapers 1F: Front body area 1B...Inseam area 1R: Back body area 2F: Front patch 2R･･Area to be pasted 2L1, 2L2, 2R1, 2R2... Tape 3W: Gathered waist 3AL, 3AR Leg Gathers 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... Rubber thread 5. Back sheet 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; Side sheets are arranged on both skin-facing sides in the width direction and extend along the longitudinal direction; A pair of tapes in the longitudinal direction extending outward from the side sheets in the width direction on both sides of the rear body region in the width direction and having an adhesive portion disposed on the skin surface side of the wearer; a receiving portion provided on an exterior surface of the front body region, the extending length in the longitudinal direction being uniform across the entire width direction and shorter than the distance along the longitudinal direction between the attachment portions arranged on each of the pair of tapes, to which the attachment portion can be attached; Absorbent articles.

2. The adhesive portions of the pair of tapes have the same extending length in the longitudinal direction, 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 pair of tapes along the longitudinal direction by one extension length of the adhesive portion in the longitudinal direction; The absorbent article of claim 1.

3. The adhesive portions of the pair of tapes have the same extending length in the longitudinal direction, 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 pair 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 1.

4. The pair of tapes in the longitudinal direction are The strength of a 90 degree peel test in a state where one of the pair of 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 pair of tapes are attached to the attachment portion is 5.0 N or more. The absorbent article according to any one of claims 1 to 3.

5. 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 any one of claims 1 to 3.

6. 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 any one of claims 1 to 3.

7. The attachment target has a straight line inclined at 45 degrees with respect to the longitudinal direction. The absorbent article of claim 6.

8. The attachment target has grid lines intersecting straight lines inclined with respect to the longitudinal direction, Numbers or symbols are written at the intersections of the grid lines. The absorbent article of claim 6.

9. The non-skin facing side of the tape is formed of a nonwoven fabric that has been treated so that the adhesive portion of another tape can be repeatedly attached thereto. The absorbent article according to any one of claims 1 to 3.

10. The absorbent article includes an exterior sheet that forms an exterior surface of the rear body region; The tape further includes an adhesive portion that adheres a skin-facing side of a region located at a center side in the width direction of the tape to a skin-facing side of the exterior sheet. The absorbent article according to any one of claims 1 to 3.

11. The pair of tapes are spaced apart from each other in the longitudinal direction, A distance between the pair of tapes is set so that, in a worn state, the tape arranged on the outer side in the longitudinal direction is attached to the attached portion so as to follow the upper side of the ilium of the wearer, and the tape arranged on the center side in the longitudinal direction is attached to the attached portion so as to follow the lower side of the ilium of the wearer. The absorbent article of claim 10.

12. a distance between a longitudinal center end of the adhesive portion formed by the tape arranged on the longitudinal outer side and a longitudinal outer end of the adhesive portion formed by the tape arranged on the longitudinal center side is 30 mm or more; The absorbent article of claim 10.

13. The tape has a regulating portion that regulates the extension length in the width direction. The absorbent article according to any one of claims 1 to 3.

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