Absorbent articles

Abstract

To provide an absorbent article making fastening materials hardly stick each other, and having excellent peeling operability.SOLUTION: An absorbent article comprises a front surface sheet, a rear surface sheet and an absorber, and the rear surface sheet has a fastening area including a plurality of fastening materials extending in the lateral direction and intermittently arranged in the longitudinal direction. A part of the plurality of fastening materials composes a first aggregate positioned at least in one of a front-end part area and a rear-end part area of the fastening area and comprising the plurality of fastening materials. The plurality of fastening materials composing the first aggregate are divided into a plurality of first fastening materials not overlapped on the absorber and second fastening materials overlapped on the longitudinal direction end part area of the absorber in a plane view. In the first aggregate, the plurality of first fastening materials are arranged so that the adhesive force is increased in the order of being positioned from the longitudinal direction end part of the absorbent article to the inside, and the second fastening material has an adhesive force higher than that of the first fastening material.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to absorbent articles such as panty liners. [Background technology]

[0002] The absorbent article is configured by disposing an absorbent body between a top sheet and a back sheet. The absorbent article is provided with a plurality of fastening materials on the back sheet to be fixed to underwear in order to prevent the product from shifting when worn (for example, see Patent Document 1). In general, absorbent articles are folded together with a packaging sheet and stored in an individual package. When the absorbent article is taken out of the individual package during wearing, the fastening materials may adhere to each other. In addition, when the absorbent article is peeled off from the underwear when changing the absorbent article, the fastening materials may adhere to each other, making it difficult to neatly roll up the absorbent article after use and difficult to discard. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-68886 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for an absorbent article that has good peeling operability and in which the fastening materials are less likely to adhere to each other when the absorbent article is taken out of an individual package or when the absorbent article is peeled off from an undergarment.

[0005] An object of the present invention is to provide an absorbent article in which fastening materials are unlikely to adhere to each other and which has good peeling operability. [Means for solving the problem]

[0006] An absorbent article according to one embodiment of the present invention comprises a top sheet, a back sheet, and an absorbent body arranged between the top sheet and the back sheet, and has a vertical direction corresponding to the front-to-back direction of the wearer and a horizontal direction perpendicular to the vertical direction, and is divided along the vertical direction into a front region, a middle region facing the wearer's excretory area, and a rear region. The absorbent article has a fastening region on the back sheet, the fastening region including a plurality of fastening members extending in the transverse direction and spaced apart in the longitudinal direction. A part of the plurality of fastening materials constitutes a first group of the plurality of fastening materials located in at least one of the front end region and the rear end region of the fastening area. The multiple fastening materials constituting the first assembly are divided into multiple first fastening materials that do not overlap the absorbent body in a planar view, and multiple second fastening materials that overlap the longitudinal end regions of the absorbent body. In the first assembly, the multiple first fastening materials are arranged so that their adhesive strength increases in the order of their position from the longitudinal end of the absorbent article toward the inside, and the second fastening material has a stronger adhesive strength than the first fastening material. Effect of the Invention

[0007] As described above, according to the absorbent article of the present invention, the fastening materials are unlikely to adhere to each other during the peeling operation, and the peeling operability is good. [Brief description of the drawings]

[0008] [Figure 1] 1 is a plan view of an individual package of an absorbent article folded at a folding portion together with a packaging sheet, which has been opened and unfolded, as viewed from the top sheet side. FIG. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 2 is a plan view of the absorbent article as viewed from the back sheet side, showing the configuration of a fastening material disposed on the back sheet, and also showing the positional relationship between the absorbent body and the fastening material. [Figure 4] FIG. 4 is a partial plan view of the absorbent article for illustrating the configuration of the fastening material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Here, a panty liner will be described as an example of an absorbent article. Panty liners are generally attached to the inner surface of the crotch part of underwear such as shorts during the period from the late menstrual period when the amount of menstrual blood is low to the non-menstrual period, and are used to absorb body fluids such as vaginal discharge, menstrual blood, and urine.

[0010] 1, the panty liner 1 is typically stored in an individually packaged state with a packaging sheet 7 disposed on the side of a back sheet 3 described later, folded around a folding part extending in a lateral direction Y described later as a folding base point. The panty liner 1 in this individually packaged state is called an individually packaged body 10. The panty liner 1 is used by peeling off the packaging sheet 7 from the individual package 10.

[0011] <Overall composition of pantyliner> 1, a panty liner 1 as an absorbent article of the present invention has a longitudinal direction X corresponding to the front-to-back direction of a wearer, a transverse direction Y corresponding to the left-to-right direction of the wearer and perpendicular to the longitudinal direction X, and a thickness direction Z perpendicular to the longitudinal direction X and the transverse direction Y. The transverse direction of the panty liner 1 corresponds to the width direction of the panty liner 1. In this specification, with respect to the thickness direction Z of the panty liner 1, the side closest to the wearer's skin when worn may be referred to as the upper or skin side, and the side closest to the underwear may be referred to as the lower or non-skin side. In addition, in this specification, the "skin side" refers to the side of the panty liner or its constituent members that faces the skin of the wearer when the panty liner is worn, i.e., the side that is relatively closer to the wearer's skin. The "non-skin side" refers to the side of the panty liner or its constituent members that faces away from the wearer's skin when the panty liner is worn. In this specification, "outer side in the longitudinal direction X" means a side away from the transverse center line CLy that divides the panty liner 1 in the longitudinal direction X in half, and "inner side in the longitudinal direction X" means a side closer to the transverse center line CLy. "Front in the longitudinal direction X" or "front" means the front in the longitudinal direction X, i.e., the direction toward the wearer's abdomen. Similarly, "rear in the longitudinal direction X" or "rear" means the rear in the longitudinal direction X, i.e., the direction toward the wearer's back. In this specification, "the inner side in the lateral direction Y" means the side closer to the vertical center line CLx that divides the panty liner 1 in half in the lateral direction Y, and "the outer side in the lateral direction Y" means the side away from the vertical center line CLx. In this specification, "when worn" means the normal, proper wearing position, i.e., the state in which the absorbent article is maintained in the correct wearing position. In this specification, the term "planar view" refers to a planar view seen from the thickness direction Z.

[0012] The panty liner 1 is divided into a front region F, a middle region C, and a rear region R along the longitudinal direction X. The intermediate region C is a region that faces the excretory part of the wearer when worn. When the absorbent article is a panty liner, the "excretory part" means the vaginal opening. The front region F is an area located in front of the intermediate region C in the longitudinal direction X (toward the wearer's abdomen), and is located so as to face the front of the wearer's excretory parts when worn. The rear region R is an area located rearward of the intermediate region C in the longitudinal direction X (toward the wearer's back), and is located so as to face the rear of the wearer's excretory parts when worn. In the panty liner 1, the front region F, the middle region C and the rear region R correspond to each of the regions when the panty liner 1 is divided into three equal parts in the longitudinal direction X.

[0013] As shown in FIG. 1, the panty liner 1 has a front end 1F located in the front in the longitudinal direction X, a rear end 1R located in the rear in the longitudinal direction X, and both side edges 1S, 1S located in the left and right in the transverse direction Y.

[0014] The panty liner 1 has an outer shape in which the dimension in the lateral direction Y increases gradually and continuously from the lateral centerline CLy outward in the longitudinal direction X, and then decreases continuously near the front end 1F and the rear end 1R. The panty liner 1 has a generally rectangular shape with rounded corners.

[0015] As shown in FIG. 2, the panty liner 1 is composed of an absorbent body 4, a top sheet 2, a back sheet 3, a second sheet 5, and a fastening material 6. The top sheet 2 constitutes the skin side 1 a of the panty liner 1 . The back sheet 3 constitutes the non-skin side 1b of the panty liner 1. The fastening material 6 is provided on the non-skin side 1b of the panty liner 1, that is, on the non-skin side of the backsheet 3. The panty liner 1 is fixed by the fastening material 6 to the inner surface of the wearer's underwear when worn.

[0016] The panty liner 1 has a structure in which a back sheet 3, an absorbent body 4, a second sheet 5, and a top sheet 2 are laminated in the thickness direction Z. These components are appropriately joined together, for example, by bonding with an adhesive or heat sealing, or by embossing with compressed grooves. In the panty liner 1, the top sheet 2, the second sheet 5 and the back sheet 3 have the same size and shape, and these overlap in a plan view to form the outer shape of the panty liner 1.

[0017] 1, the panty liner 1 has a shape that is line-symmetrical about a horizontal centerline CLy and a shape that is line-symmetrical about a vertical centerline CLx. When worn, either end of the panty liner 1 in the vertical direction X may face forward. In this specification, for convenience, the panty liner 1 and each component that constitutes the panty liner 1 are described using "front" and "rear," but, for example, either end in the vertical direction X can become the front end when worn.

[0018] <Composition of individual packaging> As shown in FIG. 1, the individual package 10 includes a panty liner 1 and a packaging sheet 7. The packaging sheet 7 is a sheet-like exterior material that forms the outer surface of the individual packaging body 10. In the example shown in Fig. 1, the packaging sheet 7 is configured in a rectangular shape that is long in the vertical direction X in a plan view seen from the thickness direction Z. The packaging sheet 7 has a front end 7F located at the front in the longitudinal direction X, a rear end 7R located at the rear in the longitudinal direction X, and both side edges 7S, 7S located at the left and right in the lateral direction Y. As the packaging sheet 7, various types of packaging sheets conventionally used for absorbent articles can be used without any particular limitation, such as resin film, nonwoven fabric, paper, etc. Such packaging sheet 7 has a lower rigidity than the absorbent body constituting the panty liner 1, and can be easily folded into a shape that fits the panty liner.

[0019] The process of folding the panty liner together with the packaging sheet will now be described. First, as shown in Fig. 1, the panty liner 1 is placed on a rectangular packaging sheet 7, approximately in the center of the packaging sheet 7, in a releasable manner via the fastening material 6. In this way, a laminate of the panty liner 1 and the packaging sheet 7 is obtained. 1, when the individual packaging body 10 is unfolded, a front end 1F of the panty liner 1 protrudes from a front end 7F of the packaging sheet 7. A rear end 1R of the panty liner 1 is located more inward in the longitudinal direction X than a rear end 7R of the packaging sheet 7, and the rear end 7R of the packaging sheet 7 protrudes further than the rear end 1R of the panty liner 1.

[0020] Here, an example is given in which the individual packaging body 10 is folded in the vertical direction X by two linear folding portions L1 and L2 extending in the horizontal direction Y. The first folding portion L1 and the second folding portion L2 become folding axes when the individual packaging body 10 is folded. The first folded portion L1 is located closer to a front end portion 7F of the packaging sheet 7, and the second folded portion L2 is located closer to a rear end portion 7R of the packaging sheet 7. In the individual packaging body 10 of this embodiment, the first folded portion L1 is located at approximately the same position as one of two imaginary lines (corresponding to the boundary between the front region F and the middle region C) that divides the panty liner 1 into thirds in the longitudinal direction X. The second folded portion L2 is located outboard in the longitudinal direction X of the other imaginary line (corresponding to the boundary between the middle region C and the rear region R). In the individual packaging body 10, the area in front of the first folding portion L1 is referred to as the first folding region 81, the area between the first folding portion L1 and the second folding portion L2 is referred to as the second folding region 82, and the area behind the second folding portion L2 is referred to as the third folding region 83.

[0021] As shown in FIG. 1, to fold the individual packaging body 10, first, the laminate of the panty liner 1 and the packaging sheet 7 is folded so that the first folding region 81 is folded onto the second folding region 82 with the first folding part L1 as the folding axis. Next, the third folding region 83 is folded over the folded first folding region 81 and second folding region 82 with the second folding portion L2 as the folding axis. Then, along both side edges in the lateral direction Y of the folded individual package 10, the packaging sheets 7 face each other and are fusion-bonded to form a sealed region 8. As a result, the panty liner 1 is folded in thirds in the longitudinal direction X to form an individual package 10.

[0022] The individual packaging body 10 is not limited to the above-mentioned configuration, and may have, for example, a release sheet between the packaging sheet 7 and the panty liner 1. Furthermore, in the above configuration, an example has been given in which one end of the panty liner 1 protrudes from the packaging sheet 7 in a plan view, but the panty liner 1 may be located within the packaging sheet 7 without protruding.

[0023] <Components of panty liners (absorbent articles)> The components constituting the panty liner 1 will now be described.

[0024] [Absorbent] 1 and 2, the absorbent body 4 extends along the longitudinal direction X, and is disposed between the second sheet 5 and the back sheet 3. The absorbent body 4 absorbs bodily fluids from the skin side 4a, and diffuses them internally to retain the bodily fluids. As the absorbent 4, any absorbent normally used in absorbent articles such as panty liners and sanitary napkins can be used without any particular restrictions. For example, a stack containing a fiber material such as pulp fiber and containing superabsorbent polymer particles as necessary, an absorbent paper containing a fiber material such as pulp fiber and containing superabsorbent polymer particles as necessary, an absorbent sheet in which superabsorbent polymer particles are disposed between two sheets of absorbent paper, and the like can be used.

[0025] 2, the absorbent body 4 has a laminated structure of two or more layers in which the sheet-like absorbent sheet is arranged in a folded state, but it may also be an absorbent body of a single layer structure without folding. The absorbent body 4 may also be an absorbent core made of laminated fiber material or an absorbent core which is a mixed laminated material in which the fibers carry absorbent polymer particles, covered with a core wrap sheet.

[0026] As shown in Figs. 1 and 3, in the panty liner 1, the absorbent body 4 has a substantially rectangular shape in a plan view. As shown in FIG. 3, the absorbent body 4 has a front end 4F located in the front direction in the longitudinal direction X, a rear end 4R located in the rear direction in the longitudinal direction X, and both side edges 4S, 4S located on the left and right in the transverse direction Y. In the panty liner 1, the absorbent body 4 is positioned across the front region F, the middle region C and the rear region R. In a plan view, the dimension of the absorbent body 4 in the longitudinal direction X is shorter than the dimension of the panty liner 1 in the longitudinal direction X. The front end 4F and rear end 4R of the absorbent body 4 are located inward in the longitudinal direction X from the front end 1F and rear end 1R of the panty liner 1, respectively. In a plan view, the dimension of the absorbent body 4 in the lateral direction Y is shorter than the dimension of the panty liner 1 in the lateral direction Y. Both side edges 4S, 4S of the absorbent body 4 are located inward in the lateral direction Y from both side edges 1S, 1S of the panty liner 1, respectively. 3 and 4, in plan view, the absorbent body 4 has a front end region 41F including a front end 4F and its vicinity, and a rear end region 41R including a rear end 4R and its vicinity.

[0027] As shown in FIGS. 1 and 3, in the panty liner 1, a region where the absorbent body 4 exists in a plan view is called an absorbent body present region 45, and a region where the absorbent body 4 does not exist is called an absorbent body non-present region . In the panty liner 1, the absorbent body-present region 45 has a higher basis weight and higher rigidity than the absorbent body-non-present region 46. The longitudinal direction X ends (front end 4F, rear end 4R) of the absorbent body 4 form the boundary between the absorbent body-present region 45, which is a high rigidity region, and the absorbent body-non-present region 46, which is a low rigidity region.

[0028] In a plan view, the absorbent body 4 has a length in the longitudinal direction X that is shorter than those of the top sheet 2, the second sheet 5, and the back sheet 3, and a length in the transverse direction Y that is shorter than the narrowest widths of the top sheet 2, the second sheet 5, and the back sheet 3. The top sheet 2, the second sheet 5, and the back sheet 3 extend outward from the entire periphery of the absorbent body 4, and these extending regions are joined to each other by a joining means such as an adhesive.

[0029] [Surface sheet] The top sheet 2 is made of a liquid-permeable sheet material, and is disposed above the second sheet 5 in the thickness direction Z. The skin side of the top sheet 2 constitutes the skin side 1a of the panty liner 1. The top sheet 2 may be any sheet commonly used in absorbent articles such as panty liners and sanitary napkins, without any particular limitations. The top sheet 2 may be made of, for example, a polyolefin resin such as polyethylene or polypropylene, or a polyester resin such as polyethylene terephthalate. From the viewpoint of achieving a soft feel, it is also possible to use a top sheet 2 made of natural fibers such as cotton fiber, silk fiber, rayon fiber, polynosic fiber, and cellulose fibers other than cotton (hemp, palm, pulp, straw), regenerated fibers, and semi-synthetic fibers such as acetate rayon, or containing these fibers.

[0030] [Second seat] As in the panty liner 1 of this embodiment, a second sheet 5 may be disposed between the top sheet 2 and the absorbent body 4. The second sheet 5 is a sheet that serves the purpose of promoting the attraction of body fluids from the top sheet 2, improving the permeability of body fluids to the absorbent body 4, and reducing the return of body fluid absorbed by the absorbent body 4 back to the top sheet 2. Any material commonly used in absorbent articles such as panty liners and sanitary napkins can be used without any particular limitation for the second sheet 5. For example, a hydrophilic nonwoven fabric or a hydrophilic fiber assembly can be used for the second sheet 5. Examples of nonwoven fabric include air-through nonwoven fabric, point-bonded nonwoven fabric, resin-bonded nonwoven fabric, spunlace nonwoven fabric, and air-laid nonwoven fabric. The second sheet 5 is larger than the absorbent body 4 in a plan view and is positioned so as to cover the absorbent body 4. The second sheet 5 has the same shape as the top sheet 2 and the back sheet 3, and is disposed over the entire surface of the panty liner 1.

[0031] [Back sheet] The backsheet 3 is disposed below the absorbent body 4 in the thickness direction Z. The non-skin side of the backsheet 3 constitutes the non-skin side 1b of the panty liner 1. As the back sheet 3, any sheet that is commonly used in absorbent articles such as panty liners and sanitary napkins can be used without any particular limitation. The back sheet 3 is formed of, for example, a sheet material having functions such as poor liquid permeability, water vapor permeability, water repellency, etc. As the sheet material, for example, a thermoplastic resin film or a laminate of the film and a nonwoven fabric can be used. Additionally, the backsheet 3 may be moisture permeable.

[0032] [Fixing material] As shown in Figs. 2 and 3, the non-skin side of the backsheet 3 is provided with a plurality of fastening members 6 for fixing the panty liner 1 to an undergarment. The fastening material 6 is configured by applying an adhesive, and is covered with a packaging sheet 7 when the panty liner 1 is in the individual package 10 before use.

[0033] 3, the multiple fastening materials 6 are arranged in a striped pattern extending in the horizontal direction Y and spaced apart in the vertical direction X. In the panty liner 1, in a plan view, each fastening material 6 has a rectangular shape and has approximately the same dimensions in the horizontal direction Y.

[0034] The plurality of fastening members 6 are all disposed at positions spaced a predetermined distance inward in the lateral direction Y from both side edges 1S, 1S of the panty liner 1. Among the multiple fastening materials 6, the fastening material 6 located outermost in the vertical direction X (the first wide fastening material 61a described later) is arranged at a position spaced a predetermined distance inward in the vertical direction X from the front end portion 1F and the rear end portion 1R of the panty liner 1.

[0035] 4, in this specification, the region where the multiple fastening materials 6 are arranged is referred to as a fastening region 30. The fastening region 30 means a region obtained by surrounding the outer edges of the multiple fastening materials 6 as a whole, and includes a region where no fastening material is located corresponding to the gap portion between adjacent fastening materials 6.

[0036] As shown in FIG. 3, in the panty liner 1, the fastening region 30 is located across the front region F, the middle region C, and the rear region R in a plan view. As shown in FIG. 4, the fastening region 30 has a front end 30F located in the front in the vertical direction X, a rear end 30R located in the rear in the vertical direction X, and both side edges 30S, 30S located on the left and right in the horizontal direction Y. The fastening region 30 is divided into a front end region (hereinafter referred to as the front end fastening region) 31F near the front end 30F including the front end 30F, a rear end region (hereinafter referred to as the rear end fastening region) 31R near the rear end 30R including the rear end 30R, and an intermediate fastening region 31C located between the front end fastening region 31F and the rear end fastening region 31R. In the panty liner 1, the front end fastening region 31F is located in the front region F. The rear end fastening region 31R is located in the rear region R. The intermediate fastening region 31C is located in a part of the front region F, in the middle region C, and in a part of the rear region R.

[0037] The dimension of the fastening region 30 in the longitudinal direction X is shorter than the dimension of the panty liner 1 in the longitudinal direction X, and the dimension of the fastening region 30 in the lateral direction Y is shorter than the dimension of the panty liner 1 in the lateral direction Y. There is a predetermined distance between the front and rear ends 30F and 30R of the fastening region 30 and the front and rear ends 1F and 1R of the panty liner 1. For this reason, no fastening material 6 is provided near the front end 1F and the rear end 1R of the panty liner 1, and the wearer can easily peel off the panty liner 1 from the packaging sheet 7 when opening the individual package 10 or peel off the panty liner 1 fixed to an undergarment by pinching the parts where the fastening material 6 is not provided with their fingers.

[0038] In addition, in a plan view, the absorbent body 4 is located within the fastening region 30, and the dimension of the absorbent body 4 in the longitudinal direction X is shorter than the dimension of the fastening region 30 in the longitudinal direction X, and the dimension of the absorbent body 4 in the lateral direction Y is shorter than the dimension of the fastening region 30 in the lateral direction Y. The front end 30F and the rear end 30R of the fastening region 30 are located a predetermined distance outward in the longitudinal direction X from the front end 4F and the rear end 4R of the absorbent body 4. The side edge portions 30S, 30S of the fastening region 30 are located a predetermined distance outward in the lateral direction Y from the side edge portions 4S, 4S of the absorbent body 4.

[0039] 3, in the panty liner 1, the multiple fastening materials 6 are divided into wide fastening materials 60 and narrow fastening materials 63 having a smaller dimension in the vertical direction X than the wide fastening materials 60. The dimension in the vertical direction X of the fastening material 6 is the width dimension of the fastening material 6 having a longitudinal direction in the horizontal direction Y. In the panty liner 1, the wide fastening members 60 have the same shape and size as each other. The narrow fastening members 63 have the same shape and size as each other. When there is no need to distinguish between the wide fastening material 60 and the narrow fastening material 63, they will be referred to as fastening material 6.

[0040] 4, in the panty liner 1, some of the fastening materials 6 among the multiple fastening materials 6 constitute a first assembly A, and the other fastening materials 6 constitute a second assembly B. The first assembly A and the second assembly B are located adjacent to each other along the vertical direction X. In the panty liner 1 of this embodiment, in the fastening region 30, the first assembly A, the second assembly B, and the first assembly A are located in this order along the vertical direction X. The first assembly A is a wide assembly composed of a plurality of wide fastening materials 60. The first assembly A is located in each of the front region F and the rear region R of the panty liner 1, more specifically, in each of the front end fastening region 31F and the rear end fastening region 31R of the fastening region 30. The second assembly B is a narrow assembly composed of a plurality of narrow fastening materials 63. The second assembly B is located between the first assembly A located in the front region F and the first assembly A located in the rear region R. In the panty liner 1, the second assembly B is located in the intermediate fastening region 31C of the fastening region 30. The second assembly B is located across a part of the front region F, the intermediate region C, and a part of the rear region R.

[0041] As shown in FIG. 4, the multiple wide fastening materials 60 constituting one first assembly A are divided into multiple first fastening materials, ie, first wide fastening materials 61, and multiple second wide fastening materials, ie, second fastening materials 62. The plurality of first wide fastening members 61 are fastening members that do not overlap with the absorbent body 4 in a plan view. The second wide fastening material 62 is a fastening material which overlaps with end regions (front end region 41F, rear end region 41R) in the longitudinal direction X of the absorbent body 4 in a plan view. In the panty liner 1 of this embodiment, one first assembly A is composed of two first wide fastening members 61 and one second wide fastening member 62. When there is no need to distinguish between the first wide fastening material 61 and the second wide fastening material 62, they will be referred to as the wide fastening material 60. In the panty liner 1 of this embodiment, in one first assembly A, of the two first wide fastening materials 61 constituting a part of the first assembly A, the first wide fastening material located on the outer side in the vertical direction X is given the reference symbol 61a, and the first wide fastening material located on the inner side in the vertical direction X is given the reference symbol 61b, and will be described below. Note that when there is no need to distinguish between the first wide fastening material 61a and the first wide fastening material 61b, they will be referred to as the first wide fastening material 61.

[0042] The second wide fastening material 62, which overlaps with the end regions (front end region 41F, rear end region 41R) in the longitudinal direction X of the absorbent body 4 in a plan view, is located near the boundary between the absorbent body presence region 45 and the absorbent body non-presence region 46. In a plan view, the boundary between the absorbent body presence region 45 and the absorbent body non-presence region 46 in the longitudinal direction X corresponds to the front end portion 4F and the rear end portion 4R which are the outer edge portions of the absorbent body 4.

[0043] The form in which "the second wide fastening material 62 overlaps with the longitudinal direction X end region of the absorbent 4" includes a form in which, in a plan view, the second wide fastening material 62 straddles the boundary and is located in both the absorbent body presence region 45 and the absorbent body non-presence region 46 in the longitudinal direction X, as well as the following form. That is, as shown in FIG. 3, in a plan view, the second wide fastening material 62 is not positioned across the boundary in the longitudinal direction X, but the distance q between the outer end of the second wide fastening material 62 in the longitudinal direction X and the end portions (front end portion 4F, rear end portion 4R) of the absorbent body 4 in the longitudinal direction X is also included. The example shown in Figures 3 and 4 has the latter configuration, in which the first wide fastening material 61b and the second wide fastening material 62 are positioned in the panty liner 1 so as to sandwich the boundary between the absorbent body presence area 45 and the absorbent body non-presence area 46 in the longitudinal direction X.

[0044] Also, as shown in Figures 3 and 4, in the panty liner 1, a first assembly A composed of a plurality of wide fastening materials 60 is located in each of the front region F and the rear region R so as to straddle the boundary between the absorbent body presence region 45 and the absorbent body non-presence region 46 in the longitudinal direction X.

[0045] <Details of adhesive material> [Relationship between the adhesive strengths of each wide adhesive material and their effects] In the first assembly A, the multiple (two in this embodiment) first wide fastening materials 61 are arranged so that their adhesive strength increases in the order of their positions from the end portion in the vertical direction X of the panty liner 1 toward the inside. In addition, the second wide fastening material 62 has a stronger adhesive strength than the first wide fastening material 61. That is, in the panty liner 1, the adhesive strength increases in the order of the first wide fastening material 61a, the first wide fastening material 61b, and the second wide fastening material 62. In other words, in the vertical direction X, the adhesive strength of the fastening material 6 gradually increases from the end of the panty liner 1 in the vertical direction X toward the inside of the panty liner 1.

[0046] Here, when opening the individual package 10, peeling and spreading the sealed area 8, and peeling and taking out the panty liner 1 from the packaging sheet 7, the wearer typically holds the packaging sheet 7 with one hand and pinches and holds the panty liner 1 near the front end 1F (or near the rear end 1R) with the fingers of the other hand. Then, while holding the panty liner 1, the wearer moves the other hand substantially along the vertical direction X to peel the panty liner 1 from the packaging sheet 7 in order from the front end 1F (or rear end 1R) to the rear end 1R (or front end 1F). If the wearer is not aware of the amount of force to apply and performs this peeling operation with excessive force, unintended adhesion of the fastening materials 6 to each other may occur. Furthermore, when peeling the panty liner 1 fixed to the underwear from the underwear, the wearer typically holds the underwear with one hand and pinches and holds the panty liner 1 near the front end 1F (or near the rear end 1R) with the fingers of the other hand. Then, while holding the underwear, the wearer moves the other hand substantially along the vertical direction X to peel the panty liner 1 from the underwear in order from the front end 1F to the rear end 1R (or from the rear end 1R to the front end 1F). If the wearer is not aware of the amount of force to apply and performs this peeling operation with excessive force, unintended adhesion of the fastening materials 6 to each other may occur. Hereinafter, the operation of peeling off the panty liner 1 from the packaging sheet 7 or the operation of peeling off the panty liner 1 from the underwear by the wearer will be simply referred to as the "peeling operation".

[0047] Moreover, the front region F and rear region R of the panty liner 1 are relatively susceptible to the movement of the wearer's body, and are particularly susceptible to rubbing against the body and discomfort when worn. In this embodiment, the absorbent 4 is not disposed near the front and rear ends (front end 1F, rear end 1R) of the panty liner 1 in the longitudinal direction X, thereby making the front region F and rear region R less rigid and more flexible, thereby improving the wearing comfort of the panty liner 1. On the other hand, the areas near the front and rear ends (front end 1F, rear end 1R) of the panty liner 1 in the longitudinal direction X have low rigidity due to the absence of the absorbent body 4, making them more susceptible to deformation and making it easier for the fastening materials 6 to adhere to each other.

[0048] In contrast, in the panty liner 1 of this embodiment, a first assembly A made up of a plurality of fastening materials is positioned in the front region F and rear region R of the panty liner 1 so as to straddle the boundary between the absorbent body-present region 45 and the absorbent body-free region 46 in the longitudinal direction X. This allows the front region F and rear region R of the panty liner 1 to be firmly fixed to the underwear, and the aforementioned improvement in wearing comfort can be fully achieved while suppressing the occurrence of twisting, shifting, and turning up in the front region F and rear region R of the panty liner 1. Furthermore, in the panty liner 1 of this embodiment, the first assembly A is composed of multiple wide fastening materials 60 that are relatively wide and large in area, so that the front region F and rear region R of the panty liner 1 can be firmly fixed to the underwear, further preventing twisting, shifting, and turning up.

[0049] In addition, in the panty liner 1 of this embodiment, the first assembly A is located in the front region F and the rear region R, which are easily deformed due to the absence of the absorbent body 4, and the multiple wide fastening materials 60 (in this embodiment, there are three: the first wide fastening material 61a, the first wide fastening material 61b, and the second wide fastening material 62) are configured so that their adhesive strength gradually increases in the order of their position from the end portion in the vertical direction X toward the inside of the panty liner 1 in the vertical direction X. With such a configuration, the wearer can be encouraged to perform the peeling operation carefully, and unintended adhesion of the fastening materials 6 to each other can be suppressed, thereby improving the peeling operability. That is, in the panty liner 1, the first wide fastening material 61b is located more inward in the vertical direction X than the first wide fastening material 61a, and is configured to have a stronger adhesive strength than the first wide fastening material 61a. In the operation of peeling off the panty liner 1, the wearer first peels off the portion of the panty liner 1 corresponding to the first wide fastening material 61a from the packaging sheet 7 or the underwear. Next, the portion corresponding to the first wide fastening material 61b is peeled off, and with the above-mentioned configuration, when starting to peel off the portion corresponding to the first wide fastening material 61b, the wearer feels an increase in resistance from the panty liner 1 during peeling. Furthermore, the second wide fastening material 62 is located more inward in the vertical direction X than the first wide fastening material 61b, and is configured to have a stronger adhesive strength than the first wide fastening material 61b. Therefore, when the wearer starts to peel off the portion of the panty liner 1 corresponding to the second wide fastening material 62 after peeling off the portion of the panty liner 1 corresponding to the first wide fastening material 61b from the packaging sheet 7 or underwear, the wearer feels an increased resistance from the panty liner 1 during peeling. In this way, by giving the wearer a tactile sensation of increased resistance from the panty liner 1, the wearer can be alerted to perform the peeling operation carefully and not to peel it off too forcefully. This allows the amount of force applied during the peeling operation to be controlled so that unintended adhesion of the fastening materials 6 does not occur, resulting in a panty liner 1 with improved peeling operability.

[0050] In addition, by arranging the plurality of wide fastening materials 60 so that the adhesive strength increases from the end in the vertical direction X toward the inside in the vertical direction X, the wide fastening materials 60 located further inward in the vertical direction X play a role of a stopper that suppresses the force of peeling during the peeling operation. This makes it difficult to peel off the fastening materials 6 with excessive force, suppresses unintended adhesion between the fastening materials 6, and improves peeling operability.

[0051] In this way, by suppressing adhesion between the fastening materials 6, it is possible to prevent the fastening materials 6 from adhering to each other when peeling the panty liner 1 from the packaging sheet 7, making the panty liner 1 unusable. Furthermore, when discarding the panty liner 1, typically, the panty liner 1 that has been fixed to the underwear by the fastening material 6 is peeled off from the underwear, rolled up with the skin side of the panty liner 1 facing inward, and wrapped in the packaging sheet 7, toilet paper, or the like for disposal. When peeling the panty liner 1 from the underwear, adhesion between the fastening materials 6 is suppressed, thereby reducing the unpleasant appearance of the panty liner 1 after use. Furthermore, since the panty liner 1 can be neatly rolled up and wrapped in the packaging sheet 7, toilet paper, or the like without being fixed in an irregular shape, it is easy to discard and the unpleasant appearance is also reduced.

[0052] In addition, the boundary between the absorbent body present area 45 and the absorbent body non-present area 46 is likely to be the starting point for bending of the panty liner 1 due to differences in product rigidity, and the area near the boundary is prone to twisting and curling due to the wearer's movements, etc. In contrast, in the panty liner 1 of this embodiment, in a plan view, the first assembly A made up of multiple wide fastening materials is positioned so as to straddle the boundary between the absorbent body presence area 45 and the absorbent body non-presence area 46 in the vertical direction X, so that the vicinity of the boundary, which is a likely starting point for bending of the panty liner 1, can be firmly fixed to the underwear, and sagging and curling starting from the boundary is suppressed. 3 and 4, in the first assembly A, the first wide fastening material 61b and the second wide fastening material 62 are positioned so as to sandwich the boundary between the absorbent body present region 45 and the absorbent body non-present region 46 in the front and rear of the vertical direction X. In this way, the first wide fastening material 61b and the second wide fastening material 62 are positioned so as to sandwich the boundary, which is likely to become the starting point of bending, in the front and rear of the vertical direction X, and the panty liner 1 is firmly fixed to the underwear, so that twisting and curling starting from the boundary are more effectively suppressed. In addition, in the panty liner 1, the first wide fastening material 61a is positioned further outboard in the vertical direction X than the first wide fastening material 61b, i.e., there are multiple first wide fastening materials 61, so that the front region F and rear region R of the panty liner 1 can be more firmly fixed to the underwear, and twisting and curling are more effectively prevented.

[0053] In this way, the panty liner 1 of this embodiment has excellent peeling operability because the fastening materials are less likely to adhere to each other during peeling. Furthermore, twisting, slippage, turning up, etc. are effectively suppressed when worn.

[0054] The adhesive strength of the fastening material 6 can be determined by measuring the adhesive strength by a T-peel method defined in JIS K6854-3:1999, which will be described later.

[0055] [Effects of narrow adhesive material] The second assembly B, which is composed of a plurality of narrow fastening materials 63, is located in the center of the transverse direction Y of the panty liner 1, over a part of the front region F, the middle region C which is the excretion facing region, and a part of the rear region R in the longitudinal direction X, as shown in FIG. In the panty liner 1, the region where the second assembly B is arranged in plan view corresponds approximately to the absorbent body presence region 45, and becomes a region with relatively high rigidity due to the presence of the absorbent body 4. By arranging the narrow fastening material 63, which is relatively narrow in width and small in area, in such a high rigidity region, it is possible to make the region low in rigidity even with the addition of the rigidity of the fastening material, compared to the case where a wide fastening material is arranged. This reduces the stiff feeling caused by the presence of the fastening material, making the panty liner 1 soft to wear and less uncomfortable to wear. Further, the narrow fastening material 63 disposed in the absorbent body existing region 45 and extending in the lateral direction Y is located in the intermediate region C which is the excretory part facing region. The intermediate region C is a region to which an external force toward the inside in the lateral direction Y is applied from both legs of the wearer when worn. By disposing the narrow fastening material 63 (having a small dimension in the vertical direction X) in such intermediate region C, the narrow fastening material 63 is less likely to act as a push rod against the external force toward the inside in the lateral direction Y applied by the wearer when worn, and can buffer the stress in the direction of deformation like a bellows, so that the narrow fastening material 63 is less likely to peel off from the underwear, and twisting and slippage are more effectively suppressed.

[0056] Additionally, both side edges 1S, 1S in the lateral direction Y of the intermediate region C of the panty liner 1 correspond to the wearer's legs. In this embodiment, the absorbent body 4 and the fastening material 6 are not disposed on both side edges in the lateral direction Y of the intermediate region C of the panty liner 1, thereby making these regions softer. This improves the feel against the skin and can further improve the wearing comfort.

[0057] In this way, in the panty liner 1, a first assembly A consisting of multiple wide fastening materials 60 that are relatively wide and large in area is arranged in the front region F and rear region R in the longitudinal direction X, which effectively prevents twisting, shifting, and turning up in the front region F and rear region R, which have absorbent-free areas 46 and are prone to deformation, and a second assembly B consisting of multiple thin fastening materials 63 that are relatively narrow and small in area is arranged in the middle region C, which reduces discomfort when worn and prevents twisting and shifting in the middle region C.

[0058] [Positional relationship between the fastening material and the folding position] 1, the plurality of wide fastening materials 60 (which constitute the first assembly A) located in the front region F are positioned outward in the vertical direction X from the first folded portion L1. Similarly, the plurality of wide fastening materials 60 (which constitute the first assembly A) located in the rear region R are positioned outward in the vertical direction X from the second folded portion L2. Here, when the individual packaging body 10 is opened and unfolded, the first folding region 81 and the third folding region 83 are easily folded from the folding portions L1 and L2 as base points so that the first folding region 81 and the third folding region 83 fall toward the second folding region 82 with the skin side of the panty liner 1 facing inward, so that the individual packaging body 10 returns to its folded shape due to the creases at the folding portions L1 and L2. In contrast, in the panty liner 1 of this embodiment, when the individual package 10 is opened and unfolded to fasten the panty liner 1 to the underwear with the fastening material 6, the front region F and rear region R of the panty liner 1 are firmly fixed to the underwear by the plurality of wide fastening materials 60 arranged outside the folded parts L1 and L2 in the vertical direction X, so that the panty liner 1 is prevented from returning to its folded shape due to folding creases, thereby improving the fit when worn.

[0059] [Details of the relationship between adhesive strength of each adhesive material] (Relationship of adhesive strength of each first wide fastening material) In the first assembly A, the maximum adhesive strength difference between the multiple first wide fastening materials 61, that is, the adhesive strength difference between the first wide fastening material 61 located most outward in the vertical direction X and the first wide fastening material 61 located most inward in the vertical direction X, among the multiple first wide fastening materials 61, is preferably set as follows. The maximum adhesive strength difference among the multiple first wide fastening materials 61 is preferably 30% or less, and more preferably 25% or less, of the adhesive strength of the first wide fastening material 61 (in this embodiment, the first wide fastening material 61a) that is located outermost in the vertical direction X among the multiple first wide fastening materials 61. With this configuration, twisting is further suppressed in the front region F and rear region R of the panty liner 1. If the maximum adhesive strength difference is too large, twisting points due to the adhesive strength difference are likely to form in the front region F and rear region R, but by setting the difference within the above range, it is possible to achieve a configuration that is less likely to form twisting points. Moreover, the maximum adhesive strength difference is preferably 5% or more, and more preferably 15% or more. With this configuration, the wearer can easily recognize the change in resistance from the panty liner 1 due to the difference in adhesive strength of the first wide fastening materials 61 during the peeling operation, and can be aware of the need to perform the peeling operation carefully and not to peel it off too forcefully. This allows the amount of force applied during the peeling operation to be controlled so that unintended adhesion between the fastening materials 6 does not occur, further improving the ease of peeling.

[0060] In the panty liner 1 of this embodiment shown in Figure 3, the above-mentioned maximum adhesive strength difference corresponds to the adhesive strength difference between the first wide fastening material 61a located at the outermost position in the vertical direction X and the first wide fastening material 61b located at the innermost position in the vertical direction X in the first assembly A.

[0061] Furthermore, in the plurality of first wide fastening materials 61 of the first assembly A, the difference in adhesive strength between two adjacent first wide fastening materials is preferably set as follows. The difference in adhesive strength between two adjacent first wide fastening materials is preferably 30% or less, and more preferably 20% or less, of the adhesive strength of the first wide fastening material 61 located on the outer side in the longitudinal direction X. With this configuration, twisting starting points due to differences in adhesive strength are less likely to form in the front region F and the rear region R, and twisting of the panty liner 1 in the front region F and the rear region R is suppressed. In addition, the difference in adhesive strength between two adjacent first wide fastening materials is preferably 5% or more, and more preferably 10% or more, of the adhesive strength of the first wide fastening material located on the outer side in the vertical direction X of the two adjacent first wide fastening materials 61. With this configuration, the wearer can easily recognize the change in resistance from the panty liner 1 due to the difference in adhesive strength of the first wide fastening materials 61 during the peeling operation, and can be aware of the need to perform the peeling operation carefully and not to peel it off too forcefully. This allows the amount of force applied during the peeling operation to be controlled so that unintended adhesion between the fastening materials 6 does not occur, further improving the ease of peeling.

[0062] In the configuration of the panty liner 1 of this embodiment shown in Fig. 3, the number of first wide fastening materials 61 constituting a part of the first assembly A is two. These two first wide fastening materials 61 (first wide fastening material 61a and first wide fastening material 61b) are arranged adjacent to each other. It is preferable that the adhesive strength difference between these two adjacent first wide fastening materials 61a and 61b is within the above range. Furthermore, in the panty liner, when the number of multiple first wide fastening materials 61 constituting part of the first assembly A is three or more, it is preferable that the adhesive strength relationship for each group of two adjacent first wide fastening materials is within the above range.

[0063] (Adhesive strength of wide adhesive material) The adhesive strength of each of the wide fastening materials 60 is preferably set as follows. The adhesive strength of each of the wide fastening materials 60 is preferably 100 cN / 25 mm or more, and more preferably 150 cN / 25 mm or more, as measured by a T-peel method defined in JIS K6854-3:1999 described below. With this configuration, the panty liner 1 is less likely to peel off from the underwear when worn, the panty liner 1 can be well fixed to the underwear, and shifting or twisting of the panty liner 1 when worn can be prevented. The adhesive strength of each wide fastening material 60 is preferably 600 cN / 25 mm or less, more preferably 500 cN / 25 mm or less, as measured by the T-peel method defined in JIS K6854-3:1999 described below. With this configuration, when the panty liner 1 is peeled off from the underwear, the fastening material is unlikely to remain on the underwear, and the panty liner 1 can be peeled off neatly from the underwear.

[0064] (An example of adhesive strength of adhesive material) The adhesive strength of the first wide fastening material 61a is preferably 100 cN / 25 mm or more, more preferably 150 cN / 25 mm or more, and is preferably 400 cN / 25 mm or less, more preferably 300 cN / 25 mm or less. The adhesive strength of the first wide fastening material 61b is preferably 200 cN / 25 mm or more, more preferably 250 cN / 25 mm or more, and is preferably 500 cN / 25 mm or less, more preferably 400 cN / 25 mm or less. The adhesive strength of the second wide fastening material 62 is preferably 300 cN / 25 mm or more, more preferably 350 cN / 25 mm or more, and is preferably 600 cN / 25 mm or less, more preferably 500 cN / 25 mm or less.

[0065] In the panty liner 1, the adhesive strength of each fastening material 6 can be set as follows, for example, so as to satisfy the relationship between the adhesive strength of each of the first wide fastening materials and the relationship between the adhesive strength of the wide fastening materials. The adhesive strength of the first wide fastening material 61a is 320cN / 25mm. The adhesive strength of the first wide fastening material 61b is 400cN / 25mm. The adhesive strength of the second wide fastening material 62 is 480 cN / 25 mm.

[0066] (Method for making adhesive strength different) The adhesive strength of each of the wide fastening materials 60 can be made different by, for example, making the basis weight of the adhesive constituting the fastening material different. An example of the basis weight is given below, but the present invention is not limited to this. The basis weight of the first wide fastening material 61a is, for example, 40 g / m 2 It is. The basis weight of the first wide fastening material 61b is, for example, 50 g / m 2 It is. The basis weight of the second wide fastening material 62 is, for example, 60 g / m 2 It is. In this way, by gradually increasing the basis weight of each wide fastening material 60 from the end in the longitudinal direction X of the panty liner 1 toward the inside, the adhesive strength of each wide fastening material 60 can be gradually increased from the end in the longitudinal direction X toward the inside.

[0067] (Method of measuring adhesive strength) The adhesive strength of the fastening material 6 is measured by the T-peel method defined in JIS K6854-3: 1999. The measurement method will be described below. The "adhesive strength" here refers to the adhesive strength of the fastening material 6 to a predetermined adherend. In the measurement by the T-type peeling method, a color fastness test cloth (cotton gold width No. 3) is used as the adherend. The measurement environment is room temperature 25±1°C and humidity 50%±5%RH. The adherend is cut into a rectangle larger than the sample width. In this embodiment, the adhesive strength was measured using a panty liner in which the fastening material width is 45 mm and is intermittently arranged for a product length of 160 mm and product width of 60 mm (minimum width 57 mm). When measuring the adhesive strength, the fastening material width is adjusted to 25 mm. In other words, if the fastening material width exceeds 25 mm, the adhesive strength is measured after adjusting the fastening material width to 25 mm using talc, dust paper, etc. A sample containing the adhesive material to be measured is placed on the adherend so that the adhesive material side (the non-skin side of the absorbent article) overlaps the adherend, and a 2 kg roller is moved back and forth on the sample to press the sample and the adherend below it through the adhesive material. The laminate of the sample and the adherend thus pressed is attached between the chucks (chuck distance 30 mm) of a tensile tester (Tensilon tensile tester RTC-1210A manufactured by Orientec Co., Ltd.), and while supporting the laminate so that it is in a T-shape as defined by JIS K6854-3:1999, the laminate is pulled in its longitudinal direction at a tensile speed of 300 mm / min to peel the sample and the adherend, and the tensile load (maximum load) at this time is recorded. The measurement is performed five times, and the average value is taken as the adhesive strength per 25 mm in the transverse direction Y by the T-shape peeling method of the adhesive material. The adhesive strength is the average adhesive strength measured five times per length in the lateral direction Y for each fastening material.

[0068] (Method for measuring basis weight of adhesive in adhesive material) The area (m2) of the adhesive material in plan view from the amount (g) of application of each adhesive material 6 2 ) can be obtained by subtracting

[0069] [Size and placement of adhesive material] (Relationship between the areas of wide and narrow fastening materials) The area difference between one wide fastening material 60 and one narrow fastening material 63 is preferably two times or more and four times or less than the area of ​​the narrow fastening material 63 . If the area difference is too large, such as more than four times, external forces applied by the wearer's movements etc. while wearing the panty liner 1 tend to be concentrated on the wide fastening material 60, which may cause the panty liner 1 to peel off from the undergarment. In contrast, by making it 4 times or less, it is possible to make it difficult for external forces to be concentrated on the wide fastening material 60, and peeling of the panty liner 1 from the underwear when worn is suppressed. Furthermore, by making the area difference two or more times, it is possible to effectively prevent twisting, shifting, and turning up while reducing the discomfort felt when worn.

[0070] (Spacing of narrow adhesive material) It is preferable that the arrangement interval of the narrow fastening materials 63 arranged at intervals along the longitudinal direction X is substantially the same as the width dimension of the narrow fastening material 63 (the length in the longitudinal direction X). Here, "substantially the same" means that the difference between the arrangement interval and the width dimension of the narrow fastening material 63 is less than ±10% of the width dimension of the narrow fastening material 63. Also, the "arrangement interval" refers to the length in the vertical direction X of the gap portion between two adjacent narrow fastening materials 63 where no fastening material is present. Note that, when the sides of the narrow fastening material 63 are wavy or have a partially protruding shape, the arrangement interval is the portion in the vertical direction X where the gap portion where no fastening material is present is the smallest. In this case, the width of the narrow fastening material 63 is the portion in the vertical direction X where the fastening material width is the largest. By setting the spacing in this way, the region of the panty liner 1 where the narrow fastening material 63 is placed, including the intermediate region C, is less likely to float from the underwear when worn, reducing the discomfort when worn. In addition, by setting the spacing in this way, when the panty liner 1 is constructed using a moisture-permeable back sheet 3, the moisture permeability of the back sheet 3 is less likely to be hindered, and steam derived from liquid absorbed by the panty liner 1 is more likely to evaporate from the back sheet 3 side. This reduces stuffiness when the panty liner 1 is worn, making the panty liner 1 comfortable to wear.

[0071] (Arrangement spacing of first wide fastening material) The arrangement interval of the plurality of first wide fastening members 61 arranged at intervals along the vertical direction X is preferably smaller than the width dimension of the first wide fastening member 61 (the length in the vertical direction X). The "arrangement interval" refers to the length in the vertical direction X of a gap between two adjacent first wide fastening members 61 where no fastening member is present. When worn, the front region F and rear region R of the panty liner 1 tend to float away from the underwear due to the folds formed by the folding portions L1 and L2 when individually packaged. However, by arranging the multiple first wide fastening materials 61 at the above-mentioned spacing, the front region F and rear region R of the panty liner 1 are less likely to float away from the underwear, thereby reducing the discomfort felt when worn.

[0072] (Examples of dimensions for each configuration) An example of the dimensions of each component of a panty liner 1 with a total length of 160 mm will be given below with reference to Figures 1, 3 and 4. Note that the dimensions of each component can be set appropriately depending on the total length of the panty liner 1, and are not limited to the values ​​given below.

[0073] As shown in FIG. 3, the dimension d of the panty liner 1 in the longitudinal direction X is 160 mm. The panty liner 1 has a wide portion having a dimension e of 60 mm in the lateral direction Y, and a narrow portion having a dimension r of 57 mm in the lateral direction Y, which is the largest dimension.

[0074] 3, the dimension i of the fastening region 30 in the vertical direction X is 134 mm. The dimension i is the distance between the outer ends of the fastening members 6 (the first wide fastening member 61 in this embodiment) located at the outermost positions in the front and rear of the vertical direction X among the multiple fastening members 6. The dimension j of the fastening region 30 in the lateral direction Y is 45 mm. In this embodiment, the dimensions of the multiple fastening members in the lateral direction Y are all the same, and the dimension j can also be said to be the dimension of the fastening member 6 in the lateral direction Y.

[0075] 3 and 4, the dimension in the lateral direction Y of the region (dry edge region) between the side edge 1S of the panty liner 1 and the side edge 30S of the fastening region 30 is preferably 10 mm or less in order to prevent the panty liner 1 from turning up when worn, and is preferably 3 mm or more in order to prevent the fastening material from adhering to the wearer's skin when worn. By making it 3 mm or more, even if the panty liner 1 is turned up due to an external force directed inward in the lateral direction Y from the wearer when worn, the fastening material is unlikely to adhere to the skin, so discomfort or rough skin due to the adhesion of the fastening material to the skin is unlikely to occur. As an example, in the panty liner 1, the region (dry edge region) between the side edge 1S of the panty liner 1 and the side edge 30S of the fastening region 30 has a maximum width h of 7.5 mm and a minimum width t of 6 mm in the lateral direction Y.

[0076] As shown in Figures 3 and 4, the distance g in the vertical direction X between the vertical X ends (front end 30F, rear end 30R) of the fastening region 30 and the vertical X ends (front end 1F, rear end 1R) of the panty liner 1 is preferably 15 mm or less in order to prevent the panty liner 1 from turning up when worn. From the viewpoint of ease of peeling, the distance g is preferably 5 mm or more, which allows the wearer to easily pinch and grip the end of the panty liner 1 with her fingers, improving peeling ease, and also makes it difficult for the wearer's fingers to come into contact with the fastening material, reducing the likelihood of discomfort caused by touching the sticky fastening material. As an example, the distance g is 13 mm.

[0077] As shown in FIG. 3, the dimension k of the wide fastening material 60 in the vertical direction X is 6 mm. The dimension m of the narrow fastening material 63 in the longitudinal direction X is 2 mm. The arrangement interval n between two adjacent wide fastening members 60 among the plurality of wide fastening members 60 is 3 mm. The arrangement interval p between two adjacent narrow fastening materials 63 among the plurality of narrow fastening materials 63 is 2 mm. The arrangement interval u between the second wide fastening material 62 and the adjacent narrow fastening material 63 is 2 mm.

[0078] Referring to FIG. 1, when the individual packaging body 10 is opened and spread out, the dimension in the vertical direction X of the first folding region 81 is 52.5 mm, the dimension in the vertical direction X of the second folding region 82 is 65 mm, and the dimension in the vertical direction X of the third folding region 83 is 52.5 mm. When the individual package 10 is opened and spread out, the dimension of the packaging sheet 7 in the vertical direction X is 162 mm.

[0079] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, a panty liner (discharge sheet) is shown as an example of the absorbent article, but the absorbent article of the present invention is not limited to this. The absorbent article of the present invention may be a urine pad, a sanitary napkin, or the like.

[0080] In addition, in the above embodiment, an example was given in which each first assembly A has two first wide fastening materials 61, but it may have three or more, and the number can be set appropriately depending on the size of the panty liner 1 and the absorbent body 4.

[0081] In the panty liner 1 of the above embodiment, the multiple fastening materials are divided into two types, wide fastening materials and narrow fastening materials, which are different in size (width) in the vertical direction X. However, the present invention is not limited to this. For example, the multiple fastening materials may be divided into three or more types, which are different in size in the vertical direction X, or all of them may have the same size in the vertical direction X. In addition, in the above-mentioned embodiment of the panty liner 1, an example has been given in which the first fastening material is located in both the front end region and the rear end region of the fastening region, but the first fastening material may be located in either the front end region or the rear end region of the fastening region. At least in an absorbent article, a first assembly consisting of a plurality of first fastening materials that do not overlap the absorbent body in a planar view and a second fastening material that overlaps the longitudinal end region of the absorbent body is disposed in at least one of the front end region and rear end region of the fastening region, and the plurality of first fastening materials and second fastening materials constituting the first assembly are arranged in order of increasing adhesive strength in the order of their position from the longitudinal end of the absorbent article toward the inside.

[0082] With this configuration, the wearer is given a tactile sensation of increased resistance from the absorbent article during the peeling operation, which makes the wearer aware of the need to perform the peeling operation carefully and not to peel off the fastening materials too vigorously with excessive force. This allows the amount of force applied during the peeling operation to be controlled so that unintended adhesion between the fastening materials does not occur, resulting in an absorbent article with improved peeling operability.

[0083] In addition, since the operation of peeling the absorbent article from the underwear is generally performed by grasping the front end portion of the absorbent article with fingers and peeling the absorbent article from the underwear in order from the front to the rear, it is preferable that the first assembly is provided in at least the front end region of the fastening region.

[0084] Furthermore, in the case of an absorbent article that has a shape that is symmetrical about the horizontal center line CLy, such as the panty liner 1 of the above embodiment, and is configured so that either the front or rear end of the absorbent article can be fixed to the underwear facing forward, the presence of the first aggregate in both the front end region and the rear end region of the fastening area makes it possible to obtain an absorbent article that allows for improved peeling operability regardless of which end is fixed to the underwear facing forward.

[0085] Furthermore, by configuring the first assembly to be located in both the front end region and the rear end region of the fastening region as in the above-described embodiment, it is possible to improve the peeling operability in both cases where the absorbent article is grasped with fingers near the front end and the absorbent article is peeled off from the underwear sequentially from front to rear, and where the absorbent article is grasped with fingers near the rear end and the absorbent article is peeled off from the underwear sequentially from rear to front.

[0086] In the above embodiment, an example of a panty liner having a shape that is line-symmetrical with respect to the horizontal center line CLy is given, but the panty liner may have a non-line-symmetrical shape. In the case of such a shape, typically, the end that will be at the front when worn is fixed, and taking into consideration that peeling operations are generally performed from the front to the rear, it is preferable to provide the first assembly in at least the front end region of the fastening region. [Explanation of symbols]

[0087] 1...Panty liner (absorbent article) 1F...Front end of the panty liner (longitudinal end of the absorbent article) 1R...Rear end of panty liner (longitudinal end of absorbent article) 2. Surface sheet 3…Back sheet 4…Absorbent 41F...Front end region of absorbent body (longitudinal end region of absorbent body) 41R: Rear end region of absorbent body (vertical end region of absorbent body) 6…Adhesion material 60...Thick fastening material (fastening material) 61...1st wide fastening material (1st fastening material) 62…Second wide fastening material (second fastening material) 63…Narrow fastening material (fastening material) 30...Fixing area 31F...Front end fastening region (front end region of fastening region) 31R... Rear end fastening region (rear end region of the fastening region) A...1st aggregate F…Front area C...middle range R…Rear area

Claims

1. An absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet, having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a transverse direction perpendicular to the longitudinal direction, the absorbent article being divided along the longitudinal direction into a front region, a middle region facing the excretory area of ​​the wearer, and a rear region, The back sheet has a fastening region including a plurality of fastening materials extending in a transverse direction and spaced apart in a longitudinal direction, A part of the plurality of fastening materials constitutes a first assembly of the plurality of fastening materials located in at least one of a front end region and a rear end region of the fastening region, The plurality of fastening materials constituting the first assembly are divided into a plurality of first fastening materials that do not overlap the absorbent body in a plan view and a plurality of second fastening materials that overlap longitudinal end regions of the absorbent body, In the first assembly, the first fastening materials are arranged in order from the longitudinal end of the absorbent article toward the inside so that their adhesive strength increases, and the second fastening material has a stronger adhesive strength than the first fastening material. Absorbent articles.

2. The plurality of fastening materials are divided into wide fastening materials and narrow fastening materials having a vertical dimension smaller than that of the wide fastening materials, The first assembly is composed of a plurality of the wide fastening materials, The fastening region includes the first assembly and a second assembly of the narrow fastening materials positioned adjacent to the first assembly in the vertical direction. The absorbent article of claim 1.

3. The fastening region includes the first assembly located in the front end region and the rear end region of the fastening region, and the second assembly located between the first assembly and the rear end region of the fastening region. The absorbent article of claim 2.

4. The area difference between one of the wide fastening materials and one of the narrow fastening materials is between two and four times the area of ​​one of the narrow fastening materials. The absorbent article according to claim 2 or 3.

5. The plurality of narrow fastening materials are located in the intermediate region, The arrangement intervals of the plurality of narrow fastening materials are substantially the same as the vertical dimension of the narrow fastening materials. The absorbent article according to any one of claims 2 to 4.

6. The first fastening member is located on the outer side in the longitudinal direction of a folding portion extending in the transverse direction, which is a base point for folding the absorbent article into an individual package. The absorbent article according to any one of claims 1 to 5.

7. In the plurality of first fastening materials of the first assembly, a maximum adhesive strength difference between the plurality of first fastening materials is 30% or less of an adhesive strength of the first fastening material located at the outermost position in a longitudinal direction. The absorbent article according to any one of claims 1 to 6.

8. In the first assembly of the plurality of first fastening materials, a difference in adhesive strength between two adjacent first fastening materials is 5% or more and 30% or less of an adhesive strength of a first fastening material located on an outer side in a longitudinal direction among the two adjacent first fastening materials. The absorbent article of claim 7.

9. The adhesive strength of each of the fastening materials constituting the first assembly is 100 cN / 25 mm or more and 600 cN / 25 mm or less when measured by a T-peel method specified in JIS K6854-3:1999. The absorbent article according to any one of claims 1 to 8.

10. In the first assembly of the first fastening materials, the arrangement interval between the first fastening materials is smaller than a vertical dimension of the first fastening materials.

10. The absorbent article according to any one of claims 1 to 9.

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