Securing member and absorbent article including the same

Abstract

A securing member according to an embodiment includes: a first band member having a band-shaped base material layer and an adhesive layer positioned on a first surface of the base material layer; a stretchable second band member adhered to the adhesive layer; and a hooking part secured on a first surface of the second band member and capable of being hooked onto a member to be secured, wherein a long direction of the first band member and a long direction of the second band member are the same direction, and the second band member has: a first end part adhered to the adhesive layer; and a second end part positioned on an opposite side from the first end part in the long direction and to which the hooking part is secured.

Description

[0001] SECURING MEMBER AND ABSORBENT ARTICLE INCLUDING THE SAME

[0002] Field of the Invention

[0003] One aspect of the present disclosure relates to a securing member and an absorbent article including the same.

[0004] Background Art

[0005] Securing members used for packing together target articles are conventionally known. For example, Patent Document 1 listed below discloses a securing member, which includes a first band member, a second band member, and a third band member, further has a first joint part between the second band member and the first band member, and a second joint part between the second band member and the third band member, and is obtained by folding and laminating the first to third band members.

[0006] Patent Documents

[0007] Patent Document 1 Japanese Unexamined Patent Application 2018-121931

[0008] Summary of the Invention

[0009] In the securing members as described above, further material savings are desired.

[0010] Means for Solving the Problem

[0011] A securing member according to an aspect of the present disclosure includes: a first band member having a band-shaped base material layer and an adhesive layer positioned on a first surface of the base material layer; a stretchable second band member adhered to the adhesive layer; and a hooking part secured on a first surface of the second band member and capable of being hooked onto a member to be secured, wherein a long direction of the first band member and a long direction of the second band member are the same direction, and the second band member has: a first end part adhered to the adhesive layer; and a second end part positioned on an opposite side from the first end part in the long direction and to which the hooking part is secured.

[0012] A securing member according to another aspect of the present disclosure, including a first band member, a second band member, and a third band member which are mutually laminated, the first to third band members being held in a folded state, the securing member further including a first joint part between the second band member and first band member and a second joint part between the second band member and third band member, wherein each of the first band member and the third band member has a band-shaped base material layer and an adhesive layer provided on a first surface of the base material layer, a long direction of the first band member, a long direction of the second band member, and a long direction of the third band member are the same direction, the second band member has a stretchable single-layer structure, a second adhesive layer is provided on a first surface of the second band member, the adhesive layer included in the first band member is detachably adhered to the second band member, the second adhesive layer is detachably adhered to the third band member, and the bending rigidity of the second band member along the long direction is 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less.

[0013] Effect of the Invention

[0014] According to one aspect of the present disclosure, it is possible to provide a securing member that enables further material saving and an absorbent article including the same.

[0015] Brief Description of the Drawings

[0016] FIG. 1A is a plan view of a securing member according to Embodiment 1,

[0017] FIG. IB is a cross-sectional view along line Ib-Ib in FIG. 1A;

[0018] FIG. 2 is a cross-sectional view depicting a state in which the securing member depicted in FIG. 1A and IB is expanded;

[0019] FIG. 3A is a plan view depicting a hooking part,

[0020] FIG. 3B is a diagram depicting a cross section along line Illb-IIIb in FIG. 3A;

[0021] FIG. 4 is a diagram depicting a sheet serving as a base for the securing member according to Embodiment 1;

[0022] FIG. 5 is a schematic diagram depicting a state in which a securing member in an unstretched state is adhered to a member to be secured;

[0023] FIG. 6 is a diagram depicting a state in which the second band member is stretched and the securing member is wrapped around and secured to the member to be secured;

[0024] FIG. 7 is a diagram depicting a securing member according to a First Modified Example of Embodiment 1;

[0025] FIG. 8A is a plan view of a securing member according to a Second Modified Example of Embodiment 1,

[0026] FIG. 8B is a diagram depicting a cross section along line Vllb-VIIb in FIG. 8A;

[0027] FIG. 9 is a cross-sectional view depicting a state in which the securing member depicted in FIG. 8A and 8B is expanded; and

[0028] FIG. 10A is a schematic cross-sectional view of a securing member used in Experimental Example 1, FIG. 1 OB is a schematic view depicting a state in which the securing member is attached to a tensile tester.

[0029] Embodiments for Carrying out the Invention

[0030] A preferred embodiment of the present invention will be described below while referring to the drawings. Note that in the following description of the drawings, the same elements are denoted by the same reference symbols, and redundant descriptions thereof will be omitted. In addition, some parts of the drawings are exaggerated to facilitate understanding, and dimensional ratios and the like are not limited to those indicated in the drawings.

[0031] In the present specification, the term "securing member" refers to a member used to secure a member to be secured. The member to be secured may be an arbitrary article, and there are no limitations on the type, shape, dimensions, number, and the like. Therefore, the purpose of use of the securing member is not limited. Examples of the member to be secured include disposable diapers, sanitary napkins, incontinence pads and other absorbent articles, and hemostatic tapes and other sanitary products. Note that sanitary products also include hemostatic tapes and the like for stopping bleeding from affected areas (e.g., wounds, cuts, puncture holes, and the like) of humans and other living organisms. In this case, the securing member includes a configuration for securing a pad in contact with the affected area, and the like.

[0032] As an example, the securing member is used to maintain the shape of the member to be secured that has been compactly packed by rolling, folding, coiling, or the like. For example, the securing member may be used to maintain the state of an absorbent article or sanitary article packed together in a compact manner. In other words, the securing member may be provided on an absorbent article, a sanitary product, or the like.

[0033] As another example, a securing member may be used to secure the same or different members to be secured to each other. For example, the securing member may be used to attach or secure an absorbent article to a garment or may be used to bundle a plurality of articles together. In other words, the member to be secured is not limited to a single article. As yet another example, the securing member may be used to secure a first region and a second region of the member to be secured. For example, the securing member may be used as a sealing tape attached to a bag of a food product and used to preserve the food product.

[0034] The securing member includes one or a plurality of band-shaped band members. The term "band member" in the present specification refers to a base material having a long and thin plate shape, rod shape, or string shape. In the present specification, a direction orthogonal to a long direction A of each band member is defined as a short direction B. Furthermore, a direction intersecting or orthogonal to the long direction A and the short direction B is defined as a thickness direction. The long direction A may be restated as a winding direction of the securing member, a pulling direction of the securing member, or the like. The band member linearly extends along the long direction A. In one embodiment, when the securing member includes a plurality of band members, the length (long-side length) of each band member along the long direction A before deformation may be 5 to 150 mm, 10 to 125 mm, or 15 to 100 mm, the length (short-side length) of each band member along the short direction B may be 2 to 30 mm, 3 to 25 mm, or 4 to 20 mm, and the thickness of each band member may be 20 to 300 pm, 30 to 250 pm, or 40 to 200 pm.

[0035] In the present specification, the band member includes one or a plurality of band portions. The band portion corresponds to an arbitrary portion of the band member. For example, when the band member is folded in two, the band member may be considered to include a first band portion and a second band portion, or may be considered to include three or more band portions. Alternatively, even if the band member does not have a bent part or the like, a part of the band member may be the first band portion and another part of the band member may be the second band portion.

[0036] Embodiment 1

[0037] First, the configuration and structure of a securing member according to Embodiment 1 will be described while referring to FIGS. 1 and 2. FIG. 1A is a plan view of the securing member according to Embodiment 1, and FIG. IB is a cross-sectional view along line Ib-Ib in FIG. 1A; FIG. 2 is a cross-sectional view depicting a state in which the securing member depicted in FIG. 1A and IB is expanded.

[0038] As depicted in FIG. 1A and IB, a securing member 100 according to Embodiment 1 has a band shape in a plan view and a generally I-shaped cross section. The securing member 100 includes a first band member 1 and a second band member 2 which are independent of and integrated with each other. The securing member 100 includes: the first band member 1 including a first end of an I- shape in the long direction A; the stretchable second band member 2 including a second end of the I- shape in the long direction A; and a hooking part 3 secured to the second band member 2 and capable of being hooked to a member to be secured. A long-side length of the securing member 100 before use is, for example, 30 mm or more and 100 mm or less.

[0039] In Embodiment 1, a first end part 2a (first end part) of the second band member 2 in the long direction A is folded, and the first end part 2a is joined to the first band member 1. Hereinafter, a state in which the second band member 2 of the securing member 100 is not stretched is defined as an "unstretched state". In the securing member 100 in the unstretched state, the second band member 2 is folded and joined to the first band member 1. On the other hand, a state in which the second band member 2 of the securing member 100 is stretched is defined as "stretched state". In the securing member 100 in the stretched state, the second band member 2 may be folded or the second band member 2 may be unfolded. Hereinafter, the abovementioned stretched state in which the second band member 2 is unfolded is defined as the “open state” of the securing member 100. When the securing member 100 is in the open state, the second band member 2 is further stretched, which may result in the second band member 2 breaking, the joint state between the first band member 1 and the second band member 2 being released, or the like. Note that in the following description, unless otherwise specified as "when the securing member 100 is stretched" or the like, each structural element of the securing member 100 will be described on the assumption that the securing member 100 is in an unstretched state. Furthermore, the hooking part 3 is secured to the second end part 2b (second end portion) of the second band member 2 in the long direction A.

[0040] The securing member 100 is provided with a first joint part 4 for maintaining integration of the first band member 1 and the second band member 2, and a second joint part 5 for maintaining the unstretched state or the stretched state. At the first joint part 4, the first band member 1 and the second band member 2 are joined to each other. At the second joint part 5, the first band member 1 and the second band member 2 are joined so as to be separable from each other. In the securing member 100, the unstretched state is released by stretching the second band member 2 along a prescribed direction, and the securing member 100 is brought into the stretched state. Furthermore, the second band member 2 is further stretched along the prescribed direction, whereby the joint between the first band member 1 and the second band member 2 at the second joint part 5 is released. As a result, the stretched state is released, and the securing member 100 is brought into the open state. At this time, the joint between the first band member 1 and the second band member 2 at the first joint part 4 is maintained. As a specific example, while a first end part la of the first band member 1 in the long direction A is secured, the second band member 2 is pulled in a direction away from the first band member 1 in the long direction A. In other words, a tensile force along the long direction A is applied to the first band member 1 and the second band member 2. Furthermore, the second band member 2 is stretched, and the unstretched state of the second band member 2 is released. When the second band member 2 is further stretched, a shear force is applied to the joint portion between the first band member 1 and the second band member 2 via the second joint part 5, and the joint between the first band member 1 and the second band member 2 at the second joint part 5 is released.

[0041] In Embodiment 1, the shear force corresponds to a force applied along a direction from the first end part la to a second end part lb of the first band member 1 in the long direction A. As a result, as depicted in FIG. 2, the second band member 2 is unfolded, and the securing member 100 assumes a single band shape in plan view with the first band member 1 and the second band member 2 arranged in sequence. The securing member 100 can, for example, wrap around members to be secured in a stretched or open state, and maintain the shape of the bundled members to be secured.

[0042] When the abovementioned joint at the second joint part 5 is released, deformation due to shearing of the second band member 2 occurs at the second joint part 5, and the second band member 2 separates from the first band member 1. In Embodiment 1, the shear strength corresponding to the joining strength of the second joint part 5 is 0.5 N / 10 mm or more and 15.0 N / 10 mm or less. When the shear strength is 0.5 N / 10 mm or more, the unstretched state of the securing member 100 can be favorably maintained when not in use. In other words, the first band member 1 can be prevented from unintentionally expanding from the second band member 2. When the shear strength is 11.5 N / 10 mm or less, the first band member 1 can be detached from the second band member 2 with an appropriate force. The lower limit value of the shear strength is not limited to 0.5 N / 10 mm, but may be, for example, 3.0 N / 10 mm. Furthermore, the upper limit value of the shear strength is not limited to 15.0 N / 10 mm, but may be, for example, 11.0 N / 10 mm or 10.0 N / 10 mm.

[0043] The shear strength is defined as a force applied when an end part of the first band member 1 is pulled in a shear direction along the long direction A to release the second joint part 5. In FIG. IB, for example, the shear direction is along the long direction A and is a direction from the first end part la to the second end part lb. In the present specification, shear strength can be measured, for example, by a tensile test described later.

[0044] Next, each of the structural elements of the securing member 100 will be described in detail. The first band member 1 is a portion of the securing member 100 that is secured to the member to be secured in advance. Furthermore, the first band member 1 is a portion of the expanded securing member 100 that is secured to the member to be secured and that forms a first end in the long direction A. The first band member 1 has a band-shaped base material layer 11 and an adhesive layer 12 (adhesive part). The base material layer 11 and the adhesive layer 12 will be described below.

[0045] The base material layer 11 has: a surface 1 la (first surface) on which the adhesive layer 12 is provided; and a surface 1 lb positioned on the opposite side to the surface 1 la in the thickness direction. The adhesive layer 12 is not provided on the surface 1 lb. In a plan view, the long-side length of the base material layer 11 is, for example, 5 mm or more and 150 mm or less, and the shortside length of the base material layer 11 is, for example, 2 mm or more and 30 mm or less. The thickness of the base material layer 11 is, for example, 20 pm or more and 300 pm or less. The base material layer 11 includes, for example, a resin, paper, nonwoven fabric, or the like. When the base material layer 11 is a resin film, the resin forming the base material layer 11 is, for example, polyethylene, polypropylene or other polyolefin. The resin may be a synthetic resin such as polyester, polyamide, polyurethane, polyvinyl chloride, or the like.

[0046] A first end part 11c of the base material layer 11 in the long direction A is a portion that overlaps the second joint part 5. In both the unstretched and stretched states, the end part 11c overlaps with the second band member 2 in the thickness direction via the adhesive layer 12. A second end part 1 Id of the base material layer 11 in the long direction A does not overlap the second band member 2 in the thickness direction, regardless of whether the base material layer 11 is in an unstretched state, a stretched state, or an open state. In Embodiment 1, the end part 11c is included in the second end part lb of the first band member 1, and the end part 1 Id is included in the first end part la of the first band member 1.

[0047] The adhesive layer 12 has a function of adhering the base material layer 11 and the member to be secured, and is a layer for maintaining the unstretched and stretched states of the securing member 100. In the securing member 100 in the open state, the adhesive layer 12 continues to perform the function of adhering the base material layer 11 and the member to be secured. The adhesive layer 12 covers the entire surface 1 la of the base material layer 11, but is not limited thereto. The thickness of the adhesive layer 12 is, for example, 5 pm or more and 100 pm or less. The adhesive layer 12 includes, for example, a pressure-sensitive adhesive. The pressure-sensitive adhesive is, for example, an acrylic-based adhesive, a rubber-based adhesive, a urethane-based adhesive, or a silicone-based adhesive. The pressure-sensitive adhesive strength of the pressuresensitive adhesive material is measured by the measurement method specified in JIS Z0237:2009, and is, for example, 13 N / cm or more and 17 N / cm or less.

[0048] A part of the adhesive layer 12 is detachably adhered to the second band member 2. A part of the first band member 1 and a part of the second band member 2 are joined to each other, thereby maintaining the securing member 100 in the unstretched state. In Embodiment 1, the part of the adhesive layer 12 includes a first adhesive portion 12a and a second adhesive portion 12b. The first adhesive portion 12a functions as a main portion of the first joint part 4, and the second adhesive portion 12b, which is another part of the adhesive layer 12, functions as a main portion of the second joint part 5. The first adhesive portion 12a is a portion portioned closer to a center side of the adhesive layer 12 in the long direction A than the second adhesive portion 12b. In the long direction A, the length of the first adhesive portion 12a is, for example, 2 times or more and 50 times or less than the length of the second adhesive portion 12b.

[0049] The second adhesive portion 12b is a portion that overlaps with the end part 11c of the base material layer 11. Therefore, it can be said that in the long direction A, the first adhesive portion 12a is positioned closer to the end part 1 Id of the base material layer 11 than the second adhesive portion 12b, and the second adhesive portion 12b is positioned closer to the end part 11c of the base material layer 11 than the first adhesive portion 12a. Furthermore, it can be said that in the long direction A, the second adhesive portion 12b is positioned closer to the second end part 2b of the second band member 2 than the first adhesive portion 12a. In Embodiment 1, the first adhesive portion 12a and the second adhesive portion 12b are adjacent to each other, but are not limited thereto. Note that the adhesive strength of the second adhesive portion 12b corresponds to the abovementioned shear strength.

[0050] Next, a configuration of the second band member 2 will be described. The second band member 2 is stretchable band-shaped member that is adhered to the adhesive layer 12 of the securing member 100. The second band member 2, which is separated from the securing member 100, released from the unstretched state, and is not stretched, has a long-side length of, for example, 5 mm or more and 150 mm or less, a short-side length of, for example, 2 mm or more and 30 mm or less, and a thickness of, for example, 20 pm or more and 300 pm or less. In Embodiment 1, the second band member 2 is a band-shaped member having a single-layer structure, and has: a surface 2c (first surface) on which the hooking part 3 is provided; and a surface 2d (second surface) positioned on the opposite side to surface 2c in the thickness direction. Furthermore, at least a part of the surface 2d is provided with an embossed portion. In other words, at least a portion of the surface 2d is an uneven surface. This causes the adhesive strength between the surface 2c and adhesive layer 12 to differ from the adhesive strength between the surface 2d and adhesive layer 12. Specifically, the adhesive strength between the surface 2d and adhesive layer 12 can be set to be lower than the adhesive strength between the surface 2c and adhesive layer 12. In the second band member 2, a part of the surface 2c is adhered to the first adhesive portion 12a of the adhesive layer 12, and a part of the surface 2d is adhered to the second adhesive portion 12b of the adhesive layer 12.

[0051] The second band member 2 is, for example, a resin film. From the perspective of stretchability, the resin material forming the second band member 2 contains not only polyethylene, polypropylene or other polyolefin but also an elastomer. The type of elastomer is not particularly limited, and includes, for example, at least a styrene-based elastomer or an olefin-based elastomer. More specific examples of the elastomer include styrene-isoprene-styrene block copolymers (SIS), styrene-butadiene-styrene block copolymers (SBS), styrene-ethylene / butylene-styrene block copolymers (SEBS), polyurethanes, polyolefins (ethylene copolymers (e.g., ethylene vinyl acetate, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers), polypropylene copolymers, polypropylene homopolymers), and the like.

[0052] In Embodiment 1, the resin material includes two different types of polyolefins (a first polyolefin and a second polyolefin) and an olefin-based elastomer. The composition ratio (PO:OE) of the total of the first polyolefin and the second polyolefin (PO) to the olefin-based elastomer (OE) in the resin material is, for example, 7:3 to 9: 1. In other words, the ratio of the mass of the olefin- based elastomer to the total mass of the first polyolefin, second polyolefin, and olefin-based elastomer is, for example, 5 wt% or more and 30 wt% or less. On the other hand, the ratio of the total mass of the first polyolefin and the second polyolefin in the mass of the resin material is, for example, 70 wt% or more and 95 wt% or less. This ensures both the stretchability and durability of the second band member 2. Furthermore, the composition ratio of the first polyolefin to the second polyolefin in the total of the first polyolefin and second polyolefin is, for example, 1 :3 to 1 : 1. In other words, the ratio of the first polyolefin in the total is, for example, 17.5 wt% or more and 45 wt% or less. On the other hand, the ratio of the second polyolefin in the total is, for example, 35 wt% or more and 67.5 wt% or less. In Embodiment 1, the first polyolefin is polypropylene (PP) and the second polyolefin is polyethylene (PE), and the composition ratio of the first polyolefin, the second polyolefin, and the olefin-based elastomer (PP:PE:OE) is, for example, 4:5: 1, 2:6:2, 3:4:3, or the like.

[0053] The resin material forming the second band member 2 may contain another component in addition to the polyolefin and elastomer. For example, the resin material may include stiffening agents (e.g., polyvinylstyrene, polystyrene, poly alpha-methylstyrene, polyester, epoxy resins, coumarone-indene resins), viscosity reducers, plasticizers, tackifiers (e.g., aliphatic hydrocarbon tackifiers, aromatic hydrocarbon tackifiers, terpene resin tackifiers, hydrogenated terpene resin tackifiers), dyes, pigments, antioxidants, antistatic agents, adhesives, antitack agents, slip agents, heat stabilizers, light stabilizers, foaming agents, glass bubbles, starch, metal salts, microfibers, and the like.

[0054] In Embodiment 1, a load of the second band member 2 when the second band member 2 is stretched 400% along the long direction A and then stretched 360% is greater than 0 N / 25 mm and less than 5.9 N / 25 mm. In this case, after the securing member 100 in the stretched or open state is wrapped around the member to be secured and the hooking part 3 is hooked onto the member to be secured, hooking of the hooking part 3 is prevented from being released due to the load. In addition, the wrapping force of the second band member 2 around the member to be secured can be favorably applied. Note that stretching the second band member 2 by 400% along the long direction A indicates that the long-side length of the second band member 2 after stretching is 500% of the long- side length (initial long-side length) of the second band member 2 before stretching.

[0055] In Embodiment 1, in the second band member 2 included in the securing member 100, the long direction A corresponds to a direction orthogonal to a machine direction (MD direction) of the second band member 2 (details to be described later). Furthermore, the bending rigidity of the second band member 2 along the long direction A is, for example, 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less. This makes it possible to favorably maintain the second band member 2 in an unstretched state. The bending rigidity of the second band member 2 along the short direction B is, for example, 0.02 gf cm2 / cm or more and 0. 10 gf cm2 / cm or less, but is not limited to thereto. The bending rigidity of the second band members 2 is measured, for example, by using a pure bending tester "KES-FB2-S" manufactured by Kato Tech Co., Ltd. In one example, when measuring the bending rigidity in the MD direction of the second band member 2, first, a test piece is prepared by cutting out from the second band member 2 to a size of 5 cm in the MD direction and 3 cm in a CD direction. Next, the prepared test piece was secured between chucks spaced 1 cm apart such that the bending direction was in the MD direction, and was bent to a maximum curvature of ±2.5 cm'1. As a result, the bending rigidity gfcm2 / cm of the second band member along the long direction A was calculated from the slope of the bending moment with respect to the curvature when the slope became constant.

[0056] The second band member 2 has: a bent part 21 positioned closer to a center side of the first band member 1 than the first end part 2a; and a bend maintaining part 22 adhered to the adhesive layer 12 so as to maintain the bent state of the bent portion 21.

[0057] The bent part 21 is a portion where a fold is provided while the second band member 2 is bent in an unstretched state, and is provided near the first end part 2a of the second band member 2. In the unstretched state, the bent part 21 is positioned in the second band member 2 closest to the first end part la of the first band member 1. Therefore, in the long direction A, the bent part 21 is positioned closer to the center side of the first band member 1 than the first end part 2a, and the second end part 2b of the second band member 2 is positioned on the opposite side of the bent part 21 with the first end part 2a interposed therebetween. Therefore, in the long direction A, the direction from the bent part 21 toward the first end part 2a coincides with the direction from the bent part 21 toward the second end part 2b.

[0058] The bend maintaining part 22 is a portion of the second band member 2 that maintains the bent state of the bent part 21, and is adhered to the second adhesive portion 12b of the adhesive layer 12. Therefore, the bend maintaining part 22 functions as part of the main portion of the second joint part 5. The bend maintaining part 22 is spaced apart from the folded portion of the second band member 2 and overlaps the first band member 1. Furthermore, the bend maintaining part 22 is positioned closer to the second end part 2b of the second band member 2 in the long direction A than the first end part 2a and the bent part 21. From the perspective of maintaining the bent state by the bend maintaining part 22 and easily releasing the bent state when the securing member 100 is used, the length of the bend maintaining part 22 along the long direction A is, for example, 0. 1 mm or more and 3 mm or less. In Embodiment 1, the surface 2d corresponding to the bend maintaining part 22 is provided with an embossed portion, but this is not limiting.

[0059] A sign part 23 is provided on a portion of the surface 2d of the second band member 2 that is covered and hidden by the first end part 2a when the bent state is maintained. The sign part 23 includes a letter, number, symbol, or the like and is positioned on the surface 2d. The sign part 23 may be ink printed on the surface 2d, or may be a member provided on the surface 2d. When the securing member 100 is in the unstretched state and in the stretched state, the sign part 23 is provided so as not to be visible due to the second band member 2 and the first band member 1. On the other hand, when the securing member 100 is in the open state, the sign part 23 is visible to a user of the securing member 100, or the like. The letter, number, or symbol included on the sign part 23 may provide, for example, instructions, warnings, and the like to stop further stretching of the second band member 2. In this case, when a user who has opened the securing member 100 visually recognizes the sign part 23, further stretching (excess stretching) of the second band member 2 is prevented. This makes it possible to prevent occurrences such as breakage of the second band member 2, destruction of the adhesion between the first band member 1 and the second band member 2 at the first adhesive portion 12a, and the like.

[0060] The hooking part 3 is a hook material configured so as to be physically hookable onto the member to be secured when the securing member 100 is expanded. The hooking part 3 is, for example, a diaper hook material used in a diaper tab. The hooking part 3 includes a sheet base material and a plurality of hook members. The thickness of the sheet base material is, for example, about 20 pm or more and 100 pm or less. The average height of the hook members is, for example, 90 pm or more and 330 pm or less. This can provide the effect of preventing a specific location from becoming thicker when wound into a roll (see FIG. 4 to be described later). The hooking part 3 is secured to the second band member 2 via an adhesive 6. The thickness of the adhesive 6 is, for example, 5 pm or more and 100 pm or less. The adhesive 6 includes, for example, a pressuresensitive adhesive. The pressure-sensitive adhesive is, for example, an acrylic-based adhesive, a rubber-based adhesive, a urethane -based adhesive, or a silicone -based adhesive. The density at which the hook members are arranged is, for example, about 500 or more and 5,000 or less per square inch.

[0061] FIG. 3A is a plan view depicting a hooking part, and FIG. 3B is a diagram depicting a cross section along line Illb-IIIb in FIG. 3 A. As depicted in FIGS. 3 A and 3B, the hooking part 3 has a structure in which a plurality of hooks 32 are provided on a base material 31. The base material 31 has a band shape and is a portion adhered to the adhesive 6. From the perspective of increasing the hooking force to the member to be secured, the length of the base material 31 along the long direction A is, for example, 2 mm or more, 3 mm or more, or 4 mm or more. From the perspective of material savings and the like for the securing member 100, the length of the base material 31 along the long direction A is, for example, 20 mm or less, 15 mm or less, or 10 mm or less. The length of the base material 31 in the short direction B is about the same as the short-side length of the second band member 2. The hook 32 has a generally mushroom-like shape in side surface view, and has a stem part 32a extending away from the second band member 2 and a cap part 32b formed at a tip end of the stem 32a. The cap part 32b has, for example, an elliptical shape with a major axis along the long direction A when viewed from the laminating direction. This makes it easier for the hook 32 to bite into the member to be secured when a force is generated that causes the securing member 100 to shrink while the hooking part 3 is hooked onto the member to be secured. In other words, the hooking force of the hooking part 3 is more easily exerted. Note that the shape of the hook 32 is not limited to thereto, and may be appropriately set on the basis of the dimensions (length, width), elongation, and the like of the securing member. For example, the hook 32 may be shaped like a hook, a T-shape, a J-shape, or the like, so long as the hooking force is sufficient.

[0062] FIG. 4 is a diagram depicting a sheet serving as a base for the securing member 100 according to Embodiment 1. As depicted in FIG. 4, a sheet 51 serving as a base of the securing member 100 is a band-shaped laminate body that is wound around a roll 50 and attached to an unwinding device or the like. The sheet 51 may be wound around the roll 50 in a manner similar to that of toilet paper, in which an unwinding direction and a rotating direction are parallel (flat winding), or in a manner similar to that of a thread, in which the unwinding direction and the rotating direction are oblique (bobbin winding). The length of the sheet 51 along the unwinding direction of the roll 50 is, for example, 100 m or more. In the sheet 51 wound around the roll 50, a part that has been cut along a direction orthogonal to an extending direction and divided into individual pieces corresponds to the securing member 100. In the sheet 51, the direction in which the sheet is wound around the roll 50 (i.e., the extending direction) corresponds to the machine direction. Therefore, as described above, the machine direction of the securing member 100 corresponds to the short direction B. Herein, the first band member 1 forms a first end of the securing member 100, and the second band member 2 forms a second end of the securing member 100. In addition, the hooking part 3, first joint part 4, and second joint part 5 are arranged so as not to overlap with each other in the laminating direction. Therefore, in the sheet 51 wound on the roll 50, it is difficult for a particular location to become thick, and thus a high-quality sheet 51 can be formed.

[0063] Next, specific examples of members to be secured to which the securing member 100 according to Embodiment 1 is used and specific examples of the effects achieved by the securing member 100 will be described while referring to FIGS. 5 and 6. FIG. 5 is a schematic diagram depicting a state in which the securing member in an unstretched state is adhered to the member to be secured. FIG. 6 is a diagram depicting a state in which the second band member is stretched and the securing member is wrapped around and secured to the member to be secured (wrapped state). As depicted in FIG. 5, a disposable diaper 200, which is a specific example of an absorbent article serving as a member to be secured, has an absorbent body therein and includes: a main body part 201 provided with a pair of leg openings; and a waist part 202 that is provided on the upper side of the main body part 201, has a waist opening, and prevents the disposable diaper 200 from shifting when put on by a wearer. The main body part 201 is formed from, for example, paper, a nonwoven fabric, and a resin film. A pattern or the like may be printed on an outer surface of the main body part 201.

[0064] When the securing member 100 is in an unstretched state, the adhesive layer 12 exposed at the securing member 100 (see FIG. IB) is adhered to the main body part 201 of the disposable diaper 200 serving as the member to be secured. In addition, the hooking part 3 of the securing member 100 is hooked to the main body part 201. At this time, the dimensions of the securing member 100 (particularly, the long-side length of the securing member 100) have been reduced, and therefore, the securing member 100 is adhered to the main body part 201 so as not to overlap with the waist part 202. In this case, the securing member 100 is less likely to come into contact with the wearer of the disposable diaper 200, thereby reducing discomfort to the wearer.

[0065] When the disposable diaper 200 is used and then discarded, the contents of the disposable diaper 200 must be prevented from leaking to the outside. Therefore, as depicted in FIG. 6, for example, the disposable diaper 200 is maintained in a rolled-up and bundled state by the securing member 100, thereby preventing the contents from leaking out. Specifically, a user pinches the hooking part 3 to release the hooking part 3, and then pulls the second band member 2 along the long direction A so as to separate from the first band member 1. At this time, the second band member 2 stretches along the long direction A with the first band member 1 as a starting point. This allows the securing member 100 to be wrapped around the disposable diaper 200 using the first band member 1 as the starting point. At this time, the joint state between the first band member 1 and the second band member 2 at the second joint part 5 may be released. Finally, in a state in which the securing member 100 is wrapped around the disposable diaper 200, the hooking part 3 is hooked onto another portion of the disposable diaper 200. As a result, the wrapped state of the disposable diaper 200 can be favorably maintained by the securing member 100.

[0066] Conventionally, a so-called Z-shaped securing member has been used in a member to be secured such as a disposable diaper or the like. This Z-shaped securing member has three types of band members as main members. In contrast, the securing member 100 according to Embodiment 1 has two types of band members as main members, and thus exhibits the functionality of a securing member while achieving material savings, as compared to the Z-shaped securing member described above. For example, the weight per meter of the sheet 51 (see FIG. 4), which is a raw material of the securing member 100 of Embodiment 1, can be made half or less of the weight per meter of a sheet as a raw material of a conventional Z-shaped securing member.

[0067] In Embodiment 1, the length along the long direction A of the bend maintaining part 22, which functions as one of the main portions of the second joint part 5, is 3 mm or less. As a result, due to the abovementioned pulling of the second band member 2 along the long direction A, the joint state between the first band member 1 and the second band member 2 at the second joint part 5 is more likely to be released before the joint state between the first band member 1 and the second band member 2 at the first joint part 4 is released. In addition, the length of the bend maintaining part 22 along the long direction A is 0.1 mm or more. This makes it difficult for the joint state between the first band member 1 and the second band member 2 at the second joint part 5 to be released at an unintended timing, such as when the member to be secured is being transported and the like.

[0068] In Embodiment 1, the sign part 23 is provided on a portion of the surface 2d of the second band member 2 that is covered by the first end part 2a when the bent state of the bend maintaining part 22 is maintained. When the securing member 100 is in the unstretched state and in the stretched state, the sign part 23 is covered and hidden by at least one of the first band member 1 and the second band member 2. On the other hand, when the securing member 100 is in the open state, the user of the securing member 100 can view the sign part 23. Depending on the content indicated by the sign part 23, the user can stop pulling the second band member 2 or the like, thereby making it less likely that the second band member 2 breaks, that the joint state between the first band member 1 and the second band member 2 at the first joint part 4 releases, or the like. In other words, by providing the sign part 23, the securing member 100 is less likely to be damaged during use.

[0069] In Embodiment 1, the second band member 2 has a single-layer structure, and the bending rigidity of the second band member 2 along the long direction A may be 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less. In this case, the hardness and the like of the second band member 2 can be reduced, and therefore, the discomfort felt by the user when touching the second band member 2 can be alleviated. In addition, the bent state of the bent part 21 of the second band member 2 is easily maintained, and therefore, unintended release of the bent state of the bent part 21 is less likely to occur. This unintended release of the bent state of the bent part 21 becomes more likely as the size of the securing member 100 is reduced. Therefore, when reducing the size of the securing member 100, it can be said that it is particularly useful to set the bending rigidity of the second band member 2 along the long direction A within the abovementioned range.

[0070] Note that the bending rigidity of the second band member 2 along the short direction B may be 0.02 gf cm2 / cm or more and 0.10 gf cm2 / cm or less. In Embodiment 1, a load of the second band member 2 when the second band member 2 is stretched 400% along the long direction A and then stretched 360% may be greater than 0 N / 25 mm and less than 5.9 N / 25 mm. In this case, unintended release of the hooking part 3 is less likely to occur from the member to be secured and the like due to a restoring force of the second band member 2 after stretching, the self-stretching of the second band member 2 itself after stretching, or the like.

[0071] In Embodiment 1, the surface 2d of the second band member 2 is provided with an embossed portion. As a result, the adhesive strength between the surface 2d and adhesive layer 12 can be set to be lower than the adhesive strength between the surface 2c and adhesive layer 12. Therefore, the joint state between the first band member 1 and the second band member 2 at the second joint part 5 is more easily released.

[0072] In Embodiment 1, the second band member 2 may include the first polyolefin, second polyolefin, and olefin-based elastomer, and the ratio of the mass of the olefin-based elastomer to the total mass of the first polyolefin, the second polyolefin, and the olefin-based elastomer may be 5 wt% or more and 30 wt% or less. In this case, the second band member 2 can exhibit favorable stretchability while having a single-layer structure.

[0073] FIG. 7 is a diagram depicting a securing member according to a First Modified Example of Embodiment 1. As depicted in FIG. 7, a second band member 2A in a securing member 100A differs from the securing member 100 of Embodiment 1 in that the second band member 2A does not have the bent part 21 and sign part 23. Furthermore, only the surface 2d of the second band member 2 is adhered to the adhesive layer 12. Therefore, there is no open state for the securing member 100A.

[0074] The securing member 100A according to the First Modified Example above can also achieve the same effects as those of Embodiment 1. In addition, the second band member 2A does not have a bend, and therefore, the second band member 2A can be made even more compact and made using less materials. For example, the weight per meter of the sheet (refer to FIG. 4), which is a raw material of the securing member 100A, can be made 1 / 3 or less of the weight per meter of a sheet as a raw material of a conventional Z-shaped securing member. Furthermore, the second band member 2A is stretchable, and therefore, the member to be secured can be favorably secured by the securing member 100A. Furthermore, in the First Modified Example, it is not necessary to consider releasing the bent state of unintended bent parts, and therefore, it is possible to simplify the manufacturing conditions and improve the yield.

[0075] FIG. 8A is a plan view of a securing member according to a Second Modified Example of Embodiment 1, and FIG. 8B is a diagram depicting a cross section along line Vllb-VIIb in FIG. 8A. FIG. 9 is a cross-sectional view depicting a state in which the securing member depicted in FIG. 8A and 8B is expanded. As depicted in FIGS. 8A and 8B, the securing member 100B is a so-called Z- shaped member that includes a third band member 301 and a tab 302 in addition to the first band member 1 and a second band member 2B. In the securing member 100B, the first band member 1, second band member 2B and third band member 301, which are mutually laminated in order, are maintained in a folded state (laminated state). The securing member 100B is formed by folding and laminating the first band member 1, second band member 2B, and third band member 301 with a first joint part 303 between the first end part 2a of the second band member 2B and the first band member 1 as a fold, and a second joint part 304 between the second end part 2b of the second band member 2B and the third band member 301 as a fold. Therefore, in the long direction A, the first joint part 303 is positioned at a first end side of the securing member 100B, and the second joint part 304 is positioned at a second end side of the fixing member 100B. Note that in FIG. 8, for the purpose of explanation, most of the first band member 1 and the second band member 2B and most of the second band member 2B and the third band member 301 are not in close contact with each other in the laminating direction, but in reality, these components are in close contact with each other in the laminating direction.

[0076] A long-side length of the securing member 100B in the laminated state is, for example, 5 mm or more, 10 mm or more, or 15 mm or more, and 55 mm or less, 45 mm or less, or 40 mm or less.

[0077] In the securing member 100B, the folds can be removed to allow the first band member 1, the second band member 2B, and the third band member 301 to expand. As a result, as depicted in FIG. 9, the expanded securing member 100B has a single band shape in which the first band member 1, the second band member 2B, and the third band member 301 are arranged in sequence. Hereinafter, the state in which the securing member 100B has a single band shape in which the first band member 1, the second band member 2B, and the third band member 301 are sequentially arranged is defined as "expanded state".

[0078] The tab 302 is adhered to the first end part la of the first band member 1 . The tab 302 is a portion serving as a gripping part when the securing member 100B is expanded, and is adhered to the adhesive layer 12 so as to protrude from the end part 1 Id of the base material layer 11 in the long direction A. From the perspective of easily determining the position of the tab 302 on the securing member 100B, the tab 302 may be colored. The tab 302 is formed from, for example, a resin film, paper, nonwoven fabric, or the like. The thickness of the tab 302 is, for example, 30 pm or more and 100 pm or less. Note that in the expanded securing member 100B, the adhesive layer 12 functions as a layer for adhering the base material layer 11 and the member to be secured. In other words, in the securing member 100B, the adhesive layer 12 is provided so as to be able to function as the hooking part 3 in Embodiment 1. The second band member 2B is a member corresponding to the second band member 2 of Embodiment 1. In other words, the second band member 2B has a single-layer structure and exhibits stretchability. In addition, the bending rigidity of the second band member 2B along the long direction A is 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less, the bending rigidity of the second band member 2B along the short direction B is 0.02 gfcm2 / cm or more and 0.10 gf cm2 / cm or less, and the load of the second band member 2B when the second band member 2B stretched 400% along the long direction A and then stretched 360% is greater than 0 N / 25 mm and less than 5.9 N / 25 mm. When the securing member 100B is in a laminated state, most of the surface 2c of the second band member 2B is detachably adhered to the adhesive layer 12.

[0079] Therefore, when the securing member 100B is in the laminated state, the first band member 1 and the second band member 2B are in close contact with each other, and the laminated state is maintained. Hereinafter, a state in which the securing member 100B is in the expanded state and the second band member 2B is stretched will be defined as a "stretched state”. If the second band member 2B is excessively stretched, problems such as breakage of the second band member 2B and the like may occur.

[0080] An adhesive layer 305 (second adhesive layer) is provided on the surface 2d of the second band member 2B. The adhesive layer 305 is a layer for maintaining the laminated state of the securing member 100B, and is adhered to the adhesive layer 12 of the first band member 1 at the first joint part 303. In addition, the adhesive layer 305 is detachably adhered to a base material layer 311 (described in detail later) of the third band member 301. Therefore, when the securing member 100B is in the laminated state, the second band member 2B and the third band member 301 are in close contact with each other via the adhesive layer 305, and the laminated state is maintained. The thickness of the adhesive layer 305 is, for example, 5 pm to 100 pm. The adhesive layer 305 is formed by applying a pressure-sensitive adhesive or the like to the surface 2d of the second band member 2B. The pressure -sensitive adhesive included in the adhesive layer 305 is, for example, the same as the pressure-sensitive adhesive forming the adhesive layer 12.

[0081] The third band member 301 is a portion of the securing member 100B that is secured to the member to be secured in advance. The third band member 301 is portion serving as a second end of the expanded securing member 100B in the long direction A. The third band member 301 has the base material layer 311 and an adhesive layer 312.

[0082] The base material layer 311 is a band-shaped member and has: a surface 311a facing the second band member 2B in the thickness direction; and a surface 311b (first surface) positioned on the opposite side from the surface 31 la in the thickness direction. The surface 31 la is detachably adhered to adhesive layer 305. The adhesive layer 312 is provided on the surface 31 lb. A first end part 311c of the base material layer 311 in the long direction A is exposed from the first band member 1 and the second band member 2B in a plan view. Furthermore, an end part 31 Id of the base material layer 311 in the long direction A is a portion forming the second joint part 304. With a preused securing member 100B, the end part 31 Id is folded back towards the second band member 2B. Therefore, at the end part 31 Id, a part of the surface 311b faces the second band member 2 side. Base material layer 311 is formed from, for example, a resin film, paper, or nonwoven fabric. The resin forming the base material layer 311 is, for example, the same as the resin forming the base material layer 11.

[0083] The adhesive layer 312 is a layer for adhering the base material layer 311 and the member to be secured. A part of a portion of the adhesive layer 312 provided on the end part 31 Id of the base material layer 311 faces the second band member 2B side and is directly adhered to the adhesive layer 305. Therefore, at the second joint part 304 between the second band member 2B and the third band member 301, mutual firm adhesion occurs due to the adhesive layers 305 and 312. Therefore, even when the securing member 100B is expanded, the second band member 2B and the third band member 301 are integrated at the second joint part 304, and separation can be favorably prevented. The thickness of the adhesive layer 312 is, for example, 5 pm to 100 pm. The adhesive layer 312 is formed by applying a pressure-sensitive adhesive or the like to the surface 31 lb of the base material layer 311. The pressure-sensitive adhesive included in the adhesive layer 312 is, for example, the same as the pressure -sensitive adhesive forming the adhesive layers 12 and 305.

[0084] The securing member 100B according to the Second Modified Example above is a so-called Z-shaped member. Herein, a second band member included in a conventional Z-shaped securing member generally has a three-layer structure in which an elastomer layer exhibiting stretchability is sandwiched between a core layer. In contrast, the second band member 2B included in the securing member 100B is stretchable and has a single-layer structure. Therefore, as compared to a conventional non-stretchable Z-shaped securing member, the securing member 100B is able to function as a securing member while being able to reduce the total length of the securing member by the amount of stretching, thereby achieving material savings. In addition, the second band member 2B is the same as the second band member 2 in Embodiment 1, and thus the bending rigidity of the second band member 2B is similar to that of the second band member 2. This makes it easier to maintain the fold of the second band member 2B, making it less likely that an unintended release of the laminated state will occur. The unintended release of the laminated state will be more likely as the size of the securing member 100B is reduced. Therefore, the securing member 100B can be made smaller than a conventional Z-shaped securing member, which allows further material saving. Furthermore, a load of the second band member 2B when the second band member 2B is stretched 400% along the long direction A and then stretched 360% may be greater than 0 N / 25 mm and less than 5.9 N / 25 mm. As a result, unintended release of the securing member 100B to the member to be secured and the like is less likely to occur due to a restoring force of the second band member 2B after stretching, the self-stretching of the second band member 2B itself after stretching, or the like.

[0085] The present invention has been described in detail above on the basis of the abovementioned embodiment and modified examples. However, the present invention is not limited to the abovementioned embodiment and modified examples. The present invention can be further modified without departing from the gist and scope of the invention.

[0086] Therefore, the aspects of the present disclosure are as follows.

[0087] Aspect 1

[0088] A securing member, including: a first band member having a band-shaped base material layer and an adhesive layer positioned on a first surface of the base material layer; a stretchable second band member adhered to the adhesive layer; and a hooking part secured on a first surface of the second band member and capable of being hooked onto a member to be secured, wherein a long direction of the first band member and a long direction of the second band member are the same direction, and the second band member has: a first end part adhered to the adhesive layer; and a second end part positioned on an opposite side from the first end part in the long direction and to which the hooking part is secured.

[0089] Aspect 2

[0090] The securing member according to aspect 1, wherein the second band member further has: a bent part positioned closer to a center side of the first band member than the first end part; and a bend maintaining part adhered to the adhesive layer so as to maintain the bent state of the bent part, and the bend maintaining part is positioned closer to the second end part than the first end part and the bent part in the long direction.

[0091] Aspect 3

[0092] The securing member according to aspect 2, wherein the length of the bend maintaining part along the long direction is 0.1 mm or more and 3 mm or less.

[0093] Aspect 4 The securing member according to aspect 2 or 3, wherein a sign part is provided on a portion of a second surface of the second band member that is covered by the first end part when the bent state is maintained.

[0094] Aspect 5

[0095] The securing member according to any one of aspects 2 to 4, wherein: the adhesive layer has a first adhesive portion adhered to the first end part and a second adhesive portion adhered to the bend maintaining part; the second adhesive portion is portioned closer to the second end part in the long direction than the first adhesive portion; and the first adhesive portion is adhered to the first surface of the second band member, and the second adhesive portion is adhered to the second surface of the second band member.

[0096] Aspect 6

[0097] The securing member according to any one of aspects 1 to 5, wherein the base material layer includes a nonwoven fabric.

[0098] Aspect 7

[0099] The securing member according to any one of aspects 1 to 6, wherein the second band member has a single-layer structure, and the bending rigidity of the second band member along the long direction is 0.02 gf cm2 / cm or more and 0.10 gf cm2 / cm or less.

[0100] Aspect 8

[0101] The securing member according to aspect 7, wherein the bending rigidity of the second band member in a short direction orthogonal to the long direction is 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less.

[0102] Aspect 9

[0103] A securing member, including a first band member, a second band member, and a third band member which are mutually laminated, the first to third band members being held in a folded state, the securing member further including a first joint part between the second band member and first band member and a second joint part between the second band member and third band member, wherein each of the first band member and the third band member has a band-shaped base material layer and an adhesive layer provided on a first surface of the base material layer, a long direction of the first band member, a long direction of the second band member, and a long direction of the third band member are the same direction, the second band member has a stretchable single-layer structure, a second adhesive layer is provided on a first surface of the second band member, the adhesive layer included in the first band member is detachably adhered to the second band member, the second adhesive layer is detachably adhered to the third band member, and the bending rigidity of the second band member along the long direction is 0.01 gf cm2 / cm or more and 0.09 gf cm2 / cm or less.

[0104] Aspect 10

[0105] The securing member according to any one of aspects 1 to 9, wherein a load of the second band member when the second band member is stretched 400% along the long direction and then stretched 360% is greater than 0 N / 25 mm and less than 5.9 N / 25 mm.

[0106] Aspect 11

[0107] The securing member according to any one of aspects 1 to 10, wherein an embossed portion is provided on the second surface of the second band member.

[0108] Aspect 12

[0109] The securing member according to any one of aspects 1 to 11, wherein the second band member includes a first polyolefin, a second polyolefin, and an olefin-based elastomer, and the ratio of the mass of the olefin-based elastomer to the total mass of the first polyolefin, the second polyolefin, and the olefin-based elastomer is 5 or more and 30 or less.

[0110] Aspect 13

[0111] An absorbent article, including: the securing member according to any one of aspects 1 to 12; and a member to be secured to which the securing member is adhered.

[0112] Aspect 14

[0113] The absorbent article according to aspect 13, which is an infant / toddler diaper.

[0114] Examples

[0115] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

[0116] Experimental Example 1

[0117] FIG. 10A is a schematic cross-sectional view of a securing member used in Experimental Example 1. In Experimental Example 1, as depicted in FIG. 10A, a securing member 100G including the first band member 1 and second band member 2 was formed. Specifically, a first band member 1 having a long-side length of 40 mm and a second band member 2 having a long-side length of 40 mm were first prepared. The adhesive layer 12 is provided over the entirety of a first surface of the first band member 1. Note that the short-side lengths of the first band member 1 and the second band member 2 were 15 mm.

[0118] Next, a part of the second band member 2 including the first end part 2a was bent to form the bent part 21. Furthermore, the first end part 2a and the bend maintaining part 22 of the second band member 2 were adhered to the adhesive layer 12. At this time, an adhesion site between the first band member 1 and the second band member 2 was pressed by a 2 kg roller. After adhering, a length LI of a folded portion of the second band member 2 along the long direction A was 6 mm, and a length L2 of the bend maintaining part 22 along the long direction A was 1 mm. In this manner, the securing member 100G was formed.

[0119] The first band member 1 includes: a polypropylene / polyethylene film having a thickness of 80 pm; and a layered pressure-sensitive adhesive (thickness: 35 pm). In Experimental Example 1, the pressure -sensitive adhesive forming the adhesive layer was a styrene-isoprene-styrene pressuresensitive adhesive based on "Quintac 3270" manufactured by Zeon Corporation. The pressuresensitive adhesive strength of the pressure-sensitive adhesive as defined by JIS Z0237:2009 is 13 to 17 N / cm.

[0120] The second band member 2 includes a single stretchable layer having a thickness of 80 pm. The single layer is a mixed layer of polypropylene, polyethylene, and an olefin-based elastomer. The mixing ratio (PP:PE:OE) of the polypropylene (PP), polyethylene (PE), and olefin-based elastomer (OE) was 3:4:3. The surface 2d of the second band member 2 is not embossed.

[0121] Experimental Example 2

[0122] In Experimental Example 2, the surface 2d of the second band member 2 was embossed, and the securing member was formed in the same manner as in Experimental Example 1, except that the embossed surface on the bend maintaining part 22 was adhered to the adhesive layer.

[0123] Tensile Test

[0124] FIG. 1 OB is a schematic view depicting a state in which the securing member is attached to a tensile tester. As depicted in FIG. 10B, the securing member 100G of Experimental Example 1 was gripped by clasps 501 and 502 of a tensile tester. Specifically, in the securing member 100G, the first end part la of the first band member 1 is gripped by the clasp 501, and the second end part 2b of the second band member 2 is gripped by the clasp 502. The distance between the clasps 501 and 502 was set to 20 mm. In the securing member 100G after being grasped by the clasps 501 and 502, a length L3 of the free end of the second band member 2 along the long direction A was 13 mm. Furthermore, the securing member 100G was pulled along the long direction A at a rate of 300 mm / min. The tensile stress (first tensile stress), when the securing member 100G changed from an unstretched state to an open state, and the tensile stress (second tensile stress), when the first band member 1 and the second band member 2 separated, were measured thereby. Furthermore, the stretching length (first stretching length) of the second band member 2, when the securing member 100G changed from the unstretched state to the open state, and the stretching length (second stretching length) of the second band member 2, when the first band member 1 and the second band member 2 were separated, were measured. Note that for the securing member formed in Experimental Example 2, the first tensile stress, the second tensile stress, the first stretching length, and the second stretching length were also measured using the same technique. Note that the first stretching length is the length by which the second band member 2 is stretched when the securing member 100G changes from the unstretched state to the open state. The second stretching length is the length of the second band member 2 itself present in the clasps 501 and 502 when the first band member 1 and the second band member 2 are separated from each other, minus the length L3.

[0125] In Experimental Example 1, the first tensile stress was approximately 20 N / 15 mm, and the second tensile stress was approximately 12 N / 15 mm. In Experimental Example 2, the first tensile stress was approximately 12 to 17 N / 15 mm, and the second tensile stress was approximately 11.5 N / 15 mm. From the abovementioned measurement results, it is understood that the first tensile stress and the second tensile stress can be adjusted by whether or not the second band member 2 is embossed. Furthermore, from Experimental Examples 1 and 2, the first tensile stress may be a value smaller than the value at which breakage of the second band member occurs, for example, 5 N / 15 mm or more and less than 35 N / 15 mm. From the perspective of not impairing usability as a disposal tape, the first stretching length may be 40 mm or more.

[0126] In Experimental Example 1, the first stretching length was approximately 66 to 84 mm, and the second stretching length was approximately 121 to 141 mm. In Experimental Example 2, the first stretching length was approximately 63 to 82 mm, and the second stretching length was approximately 126 to 143 mm. From the above, it can be said that in both Experimental Examples 1 and 2, when the first tensile stress, that is, the tension of the second band member 2, is terminated at a time point when the securing member 100G changes from an unstretched state to an open state, the user can usefully utilize the stretching of the second band member 2 without damaging the securing member.

[0127] Experimental Example 3

[0128] The securing member was formed in the same manner as in Experimental Example 1, except that the total length of the first band member was 27 mm, a base material having a mixing ratio (PP:PE:OE) of 4:5: 1 of polypropylene (PP), polyethylene (PE) and olefin-based elastomer (OE) was used as the second band member, the total length of the second band member was 27 mm, the first band member and the second band member were joined via an adhesive layer without folding the second band member, and a 6 mm wide hook member with 1600 pins / square inch was provided as a hooking part at the second end part of the second band member via an adhesive. Note that the length of a portion of the second band member, which was not joined to another member and was freely stretchable, was 13 mm. A portion of the adhesive layer of the first band member, which was not joined to the second band member, was attached to an outer surface of a main body part of a commercially available disposable diaper serving as a member to be secured. The load of the second band member used in Experimental Example 3 when the second band member was stretched 360% after being stretched 400% along the long direction A was 1.9 N / 25 mm.

[0129] Experimental Example 4

[0130] A securing member was formed in the same manner as in Experimental Example 3, except that the second band member was a film having a pair of stretchable skin layers and a core layer positioned between the pair of skin layers.

[0131] Each of the pair of skin layers is a layer containing a non-elastomeric olefin-based resin (PP / PE copolymer) as a main component. The core layer is a layer of an elastomeric olefin-based resin (PP / PE copolymer). A portion of the adhesive layer of the first band member, which was not joined to the second band member, was attached to an outer surface of a main body part of a commercially available disposable diaper serving as a member to be secured. The load of the second band member used in Experimental Example 4 when the second band member was stretched 400% and then 360% along the long direction A was 5.9 N / 25 mm.

[0132] The securing members of Experimental Examples 3 and 4 were used. Specifically, first, the main body part of the disposable diaper was allowed to absorb 200 mb of water. Next, the securing member was stretched, and a free part of the second band-shaped member was wrapped around the disposable diaper while being pulled 42 mm (400%), and the hooking part was hooked onto a different outer surface of the main body part. In Experimental Example 3, the disposable diaper was still held in place by the hooking part even after being left for 12 hours after the hooking. On the other hand, in Experimental Example 4, the disposable diaper was released from the hooking part two minutes after the hooking. It is presumed that this is because the hooking of the hooking part is released due to the restoring force of the second band member after stretching. Experimental Example 5

[0133] In Experimental Example 5, a securing member having a Z-shaped cross section depicted in FIG. 8B was formed. Specifically, the first band member of Experimental Example 1, having a long- side length of 31 mm, was prepared as a first band member of Experimental Example 5 ; the second band member of Experimental Example 1, having a long-side length of 33 mm and coated with a pressure -sensitive adhesive (thickness: 50 pm) similar to the first band member, was prepared as a second band member of Experimental Example 5; and a polypropylene / polyethylene film (long-side length: 33 mm, thickness: 70 pm) coated with a pressure-sensitive adhesive (thickness: 50 pm) similar to the first band member was prepared as a third band member of Experimental Example 5. Next, in a laminating device, the first band member and the second band member were joined (i.e., a first joint part was formed), and the second band member and the third band member were joined (i.e., a second joint part was formed). At this time, a long-side length of each of the first and second joint parts was set to 5 mm. In Experimental Example 5, the bending rigidity of the second band member along the long direction was 0.036 gf cm2 / cm.

[0134] Experimental Example 6

[0135] A securing member was formed in the same manner as in Experimental Example 5, except that the second band member of Experimental Example 2, having a long-side length of 33 mm and coated with a pressure-sensitive adhesive (thickness: 50 pm) similar to the first band member, was used as a second band member. In Experimental Example 6, the bending rigidity of the second band member along the long direction was 0.082gf cm2 / cm.

[0136] Experimental Example 7

[0137] A securing member was formed in the same manner as in Experimental Example 5, except that the long-side length of the first band member was 36 mm, the long-side length of the second band member was 56 mm, the long-side length of the third band member was 59 mm, and the second band member of Experimental Example 4 coated with a pressure-sensitive adhesive (styrene- isoprene-styrene-based pressure-sensitive adhesive based on "DX420" manufactured by Kraton Polymer Japan Ltd., thickness: 15 pm) was used as the second band member. In Experimental Example 7, the bending rigidity of the second band member along the long direction was 0.52 gf cm2 / cm. Note that the pressure-sensitive adhesive strength of the pressure-sensitive adhesive coated on the second band member, as defined in JIS Z0237:2009, was 3.3 to 4.5 N / cm.

[0138] When a large number of the securing members of Experimental Examples 5 to 7 were formed, in some of the securing members of Experimental Example 7, a fold of the second band member 2B was not maintained, and the adhesion of the first joint part 303 came undone, resulting in the laminated state being unintentionally released. On the other hand, in all of the securing members of Experimental Examples 5 and 6, unintended release of the laminated state did not occur. This is presumably because the bending rigidity along the long direction of the second band members used in Experimental Examples 5 and 6 was 0. 10 gfcm2 / cm or less, and therefore, unintended release of the laminated state due to the self-restoring force of the second band member did not occur.

[0139] Description of the Reference Numbers

[0140] 1... First band member, la... First end part, lb... Second end part, 2, 2A, 2B... Second band member, 2a... First end part (first end part), 2b... Second end part (second end part), 2c... Surface (first surface), 2d... Surface (second surface), 3... Hooking part, 4... First joint part, 5... Second joint part, 6... Adhesive, 11... Base material layer, I la... Surface (first surface), 11b... Surface, 11c... End part, 1 Id... End part, 12... Adhesive layer, 12a... First adhesive portion, 12b... Second adhesive portion, 21... Bent part, 22... Bend maintaining part, 23... Sign part, 31... Base material, 32... Hook, 32a... Stem part, 32b... Cap part, 50... Roll, 51... Sheet, 100, 100A, 100B, 100G... Securing member, 200... Disposable diaper, 301... Third band member, 302... Tab, 303... First joint part, 304... Second joint part, 305... Adhesive layer (Second adhesive layer), 311... Base material layer, 311a... Surface, 311b... Surface (First surface), 311c... End part, 31 Id... End part, 312... Adhesive layer.

Claims

What is Claimed:

1. A securing member, including: a first band member having a band-shaped base material layer and an adhesive layer positioned on a first surface of the base material layer; a stretchable second band member adhered to the adhesive layer; and a hooking part secured on a first surface of the second band member and capable of being hooked onto a member to be secured, wherein a long direction of the first band member and a long direction of the second band member are the same direction, and the second band member has: a first end part adhered to the adhesive layer; and a second end part positioned on an opposite side from the first end part in the long direction and to which the hooking part is secured.

2. The securing member according to claim 1, wherein the second band member further has: a bent part positioned closer to a center side of the first band member than the first end part; and a bend maintaining part adhered to the adhesive layer so as to maintain the bent state of the bent part, and the bend maintaining part is positioned closer to the second end part than the first end part and the bent part in the long direction.

3. The securing member according to claim 2, wherein the length of the bend maintaining part along the long direction is 0.1 mm or more and 3 mm or less.

4. The securing member according to claim 2 or 3, wherein a sign part is provided on a portion of a second surface of the second band member that is covered by the first end part when the bent state is maintained.

5. The securing member according to claim 2 or 3, wherein: the adhesive layer has a first adhesive portion adhered to the first end part and a second adhesive portion adhered to the bend maintaining part; the second adhesive portion is portioned closer to the second end part in the long direction than the first adhesive portion; andthe first adhesive portion is adhered to the first surface of the second band member, and the second adhesive portion is adhered to the second surface of the second band member.

6. The securing member according to any one of claims 1 to 3, wherein the base material layer includes a nonwoven fabric.

7. The securing member according to any one of claims 1 to 3, wherein the second band member has a single-layer structure, and the bending rigidity of the second band member along the long direction is 0.01 gfcm2 / cm or more and 0.09 gfcm2 / cm or less.

8. The securing member according to claim 7, wherein the bending rigidity of the second band member in a short direction orthogonal to the long direction is 0.02 gf cm2 / cm or more and 0.10 gf cm2 / cm or less.

9. A securing member comprising a first band member, a second band member, and a third band member which are mutually laminated, the first to third band members being held in a folded state, the securing member further comprising a first joint part between the second band member and first band member and a second joint part between the second band member and third band member, wherein each of the first band member and the third band member has a band-shaped base material layer and an adhesive layer provided on a first surface of the base material layer, a long direction of the first band member, a long direction of the second band member, and a long direction of the third band member are the same direction, the second band member has a stretchable single-layer structure, a second adhesive layer is provided on a first surface of the second band member, the adhesive layer included in the first band member is detachably adhered to the second band member, the second adhesive layer is detachably adhered to the third band member, and the bending rigidity of the second band member along the long direction is 0.01 gfcm2 / cm or more and 0.09 gfcm2 / cm or less.

10. The securing member according to any one of claims 1 to 3 and 8, wherein a load of the second band member when the second band member is stretched 400% along the long direction and then stretched 360% is greater than 0 N / 25 mm and less than 5.9 N / 25 mm.

11. The securing member according to any one of claims 1 to 3 and 8, wherein an embossed portion is provided on the second surface of the second band member.

12. The securing member according to any one of claims 1 to 3 and 8, wherein the second band member includes a first polyolefin, a second polyolefin, and an olefin-based elastomer, and the ratio of the mass of the olefin-based elastomer to the total mass of the first polyolefin, the second polyolefin, and the olefin-based elastomer is 5 wt% or more and 30 wt% or less.

13. An absorbent article, comprising : the securing member according to any one of claims 1 to 3 and 8; and a member to be secured to which the securing member is adhered.

14. The absorbent article according to claim 13, which is an infant / toddler diaper.

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