Fixing member and absorbent article provided with the same

Abstract

To provide a fixing member capable of further material saving, and an absorbent article provided with the same.SOLUTION: A fixing member according to an embodiment includes: a first belt member which has a belt-like base material layer, and an adhesion layer located on one surface of the base material layer; an expandable second belt member adhered to the adhesion layer; and a fastening part which is fixed on one surface of the second belt member and can be fastened to a fixed member. A longitudinal direction of the first belt member is the same direction as a longitudinal direction of the second belt member. The second belt member has: a first end part adhered to the adhesion layer; and a second end part located opposite the first end part in the longitudinal direction and to which the fastening part is fixed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] One aspect of the present disclosure relates to a fixing member and an absorbent article including the same.

Background Art

[0002] Conventionally, fixing members used for bundling target articles are known. For example, Patent Document 1 below discloses a fixing member including a first band member, a second band member, and a third band member, having a first joint portion between the second band member and the first band member and a second joint portion between the second band member and the third band member, and formed by folding and laminating the first to third band members.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the fixing member as described above, further material saving is desired.

Means for Solving the Problems

[0005] A fixing member according to one aspect of the present disclosure includes a strip-shaped base material layer, a first band member having an adhesive layer located on one surface of the base material layer, an extendable second band member adhered to the adhesive layer, and a latching portion fixed on one surface of the second band member and capable of latching onto a member to be fixed. The longitudinal direction of the first band member and the longitudinal direction of the second band member are the same direction, and the second band member has a first end portion adhered to the adhesive layer and a second end portion located on the opposite side of the first end portion in the longitudinal direction and to which the latching portion is fixed.

[0006] A fixing member according to another aspect of the present disclosure includes a first belt member, a second belt member, and a third belt member that are laminated on each other, and is a fixing member that holds the first to third belt members in a folded state. It has a first joint portion between the second belt member and the first belt member and a second joint portion between the second belt member and the third belt member. Each of the first belt member and the third belt member has a strip-shaped base material layer and an adhesive layer provided on one surface of the base material layer. The longitudinal direction of the first belt member, the longitudinal direction of the second belt member, and the longitudinal direction of the third belt member are in the same direction. The second belt member has an extensible single-layer structure, and a second adhesive layer is provided on one surface of the second belt member. The adhesive layer included in the first belt member is detachably adhered to the second belt member, and the second adhesive layer is detachably adhered to the third belt member. The bending rigidity of the second belt member along the longitudinal direction is 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less.

Advantages of the Invention

[0007] According to one aspect of the present disclosure, it is possible to provide a fixing member capable of further material saving and an absorbent article including the same.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same reference numerals are given to the same elements, and duplicate descriptions are omitted. Also, the drawings are drawn with some exaggeration for easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

[0010] As used herein, the "fixing member" means a member used to fix a member to be fixed. The member to be fixed may be any article, and its type, shape, dimensions, number, etc. are not limited in any way. Therefore, the purpose of using the fixing member is also not limited. Examples of the member to be fixed include absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads, and sanitary products such as hemostatic tapes. The sanitary products include, for example, hemostatic tapes for stopping bleeding at the affected parts (such as wounds, cuts, or puncture holes) of organisms such as humans. In this case, the fixing member includes a configuration for fixing a pad that abuts on the affected part.

[0011] As an example, the fixing member is used to hold the shape of the member to be fixed that is made small by rounding, bending, or winding, etc. For example, the fixing member is used to hold the state of an absorbent article or a sanitary article that is made small. That is, the fixing member may be provided in an absorbent article, a sanitary product, or the like.

[0012] As another example, the fixing member may be used to fix the same or different members to be fixed to each other. For example, the fixing member may be used to attach or fix an absorbent article to clothing, or may be used to bundle a plurality of articles. That is, the member to be fixed is not limited to a single article. As yet another example, the fixing member may be used to fix the first region and the second region in the member to be fixed. For example, the fixing member may be attached to a food bag and used as a sealing tape for storing the food.

[0013] The fixing member includes a belt member having one or more belt shapes. The term "belt member" in this specification means an elongated plate-like, rod-like, or string-like base material. In this specification, a direction orthogonal to the longitudinal direction A of each belt member is defined as the short-side direction B. Also, a direction intersecting or orthogonal to the longitudinal direction A and the short-side direction B is defined as the thickness direction. The longitudinal direction A may be alternatively referred to as the winding direction of the fixing member, or the pulling direction of the fixing member. The belt member extends linearly along the longitudinal direction A. In a case where the fixing member includes a plurality of belt members in a certain aspect, the length (long-side length) along the longitudinal direction A of each belt member before deformation may be 5 to 150 mm, 10 to 125 mm, or 15 to 100 mm, and the length (short-side length) in the short-side direction B of each belt member may be 2 to 30 mm, 3 to 25 mm, or 4 to 20 mm, and the thickness of each belt member may be 20 to 300 μm, 30 to 250 μm, or 40 to 200 μm.

[0014] In this specification, the belt member includes one or more belt portions. The belt portion corresponds to any portion of the belt member. For example, when the belt member is folded in two, the belt member may be regarded as including one belt portion and the other belt portion, or may be regarded as including three or more belt portions. Alternatively, even when there is no bending portion or the like in the belt member, a part of the belt member may be regarded as one belt portion and the other part of the belt member may be regarded as the other belt portion.

[0015] (First Embodiment) First, with reference to FIGS. 1 and 2, the configuration and structure of the fixing member according to the first embodiment will be described. FIG. 1(a) is a plan view of the fixing member according to the first embodiment, and FIG. 1(b) is a cross-sectional view taken along line Ib-Ib of FIG. 1(a). FIG. 2 is a cross-sectional view showing the state in which the fixing member shown in FIGS. 1(a) and 1(b) is developed.

[0016] As shown in FIGS. 1(a) and 1(b), the fixing member 100 according to the first embodiment has a belt shape in plan view and a substantially I-shaped cross section. The fixing member 100 includes a first belt member 1 and a second belt member 2 that are independent of each other and integrated. The fixing member 100 includes a first belt member 1 including one end of the I-shape in the longitudinal direction A, a second belt member 2 including the other end of the I-shape in the longitudinal direction A and being extensible, and a latching portion 3 that is fixed to the second belt member 2 and can be latched to the member to be fixed. The length of the long side of the fixing member 100 before use is, for example, 30 mm or more and 100 mm or less.

[0017] In the first embodiment, one end portion 2a (the first end portion) of the second belt member 2 in the longitudinal direction A is bent, and the one end portion 2a is joined to the first belt member 1. Hereinafter, the state in which the second belt member 2 of the fixing member 100 is not extended is defined as the "non-extended state". In the fixing member 100 in the non-extended state, the second belt member 2 is folded and joined to the first belt member 1. On the other hand, the state in which the second belt member 2 of the fixing member 100 is extended is defined as the "extended state". In the fixing member 100 in the extended state, the second belt member 2 may be folded, or the folding of the second belt member 2 may be released. Hereinafter, the state in which the folding of the second belt member 2 is released in the above extended state is defined as the "open state" of the fixing member 100. When the fixing member 100 is in the open state, further extension of the second belt member 2 causes breakage of the second belt member 2, release of the joined state between the first belt member 1 and the second belt member 2, and the like. In the following description, each component of the fixing member 100 is described on the premise of the non-extended state unless otherwise specified such as "when the fixing member 100 is extended". Further, a latching portion 3 is fixed to the other end portion 2b (the second end portion) of the second belt member 2 in the longitudinal direction A.

[0018] The fixing member 100 is provided with a first joint portion 4 for maintaining the integration of the first belt member 1 and the second belt member 2, and a second joint portion 5 for maintaining the unextended state or the extended state. In the first joint portion 4, the first belt member 1 and the second belt member 2 are joined to each other. In the second joint portion 5, the first belt member 1 and the second belt member 2 are joined to each other in a separable manner. In the fixing member 100, by extending the second belt member 2 along a predetermined direction, the unextended state is released, and the fixing member 100 enters the extended state. Then, by further extending the second belt member 2 along a predetermined direction, the joint between the first belt member 1 and the second belt member 2 in the second joint portion 5 is released. As a result, the extended state is eliminated, and the fixing member 100 enters the open state. At this time, the joint between the first belt member 1 and the second belt member 2 in the first joint portion 4 is maintained. As a specific example, while fixing one end portion 1a of the first belt member 1 in the longitudinal direction A, the second belt member 2 is pulled in a direction away from the first belt member 1 in the longitudinal direction A. That is, a tensile force along the longitudinal direction A is applied to the first belt member 1 and the second belt member 2. Then, the second belt member 2 extends, and the unextended state of the second belt member 2 is eliminated. When the second belt member 2 further extends, a shearing force is applied to the joint portion between the first belt member 1 and the second belt member 2 via the second joint portion 5, and the joint between the first belt member 1 and the second belt member 2 in the second joint portion 5 is released. In the first embodiment, the shearing force corresponds to a force applied along the direction from one end portion 1a to the other end portion 1b of the first belt member 1 in the longitudinal direction A. As a result, as shown in FIG. 2, the folding of the second belt member 2 is eliminated, and the fixing member 100 exhibits a single belt shape in which the first belt member 1 and the second belt member 2 are arranged in order in a plan view. The fixing member 100 can be wound around the member to be fixed in the extended state or the open state, and can hold the shape of the bundled member to be fixed.

[0019] When the joint in the second joint portion 5 is released, deformation due to shearing of the second belt member 2 and peeling of the second belt member 2 from the first belt member 1 occur in the second joint portion 5. In the first embodiment, the shear strength corresponding to the joint force of the second joint portion 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 unextended state of the fixing member 100 when not in use can be maintained well. That is, it is possible to prevent the first belt member 1 from being unintentionally deployed from the second belt member 2. When the shear strength is 11.5 N / 10 mm or less, the first belt member 1 can be detached from the second belt member 2 with an appropriate force. The lower limit value of the shear strength is not limited to 0.5 N / 10 mm, and may be, for example, 3.0 N / 10 mm. Also, the upper limit value of the shear strength is not limited to 15.0 N / 10 mm, and may be, for example, 11.0 N / 10 mm or 10.0 N / 10 mm.

[0020] The shear strength is defined as the force applied when the end of the first belt member 1 is pulled in the shearing direction along the longitudinal direction A to release the second joint portion 5. This shearing direction is, for example, along the longitudinal direction A in FIG. 1(b) and is the direction from one end portion 1a to the other end portion 1b. In this specification, the shear strength can be measured, for example, by a tensile test described later.

[0021] Next, each component of the fixing member 100 will be described in detail. The first belt member 1 is a portion that is pre-fixed to the member to be fixed in the fixing member 100. Also, the first belt member 1 is a portion that is fixed to the member to be fixed and becomes one end in the longitudinal direction A in the deployed fixing member 100. The first belt member 1 has a belt-shaped base material layer 11 and an adhesive layer 12 (adhesive portion). Hereinafter, the base material layer 11 and the adhesive layer 12 will be described.

[0022] The base material layer 11 has a surface 11a (one surface) where the adhesive layer 12 is provided and a surface 11b located on the opposite side of the surface 11a in the thickness direction. The adhesive layer 12 is not provided on the surface 11b. In a plan view, the length of the long side of the base material layer 11 is, for example, 5 mm or more and 150 mm or less, and the length of the short side 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 μm or more and 300 μm or less. The base material layer 11 includes, for example, resin, paper, non-woven fabric, etc. When the base material layer 11 is a resin film, the resin constituting the base material layer 11 is, for example, a polyolefin such as polyethylene or polypropylene. The resin may also be a synthetic resin such as polyester, polyamide, polyurethane, or polyvinyl chloride.

[0023] One end portion 11c of the base material layer 11 in the longitudinal direction A is a portion that overlaps with the second joint portion 5. In the unextended state and the extended state, the end portion 11c overlaps with the second belt member 2 in the thickness direction via the adhesive layer 12. The other end portion 11d of the base material layer 11 in the longitudinal direction A does not overlap with the second belt member 2 in the thickness direction in any of the unextended state, the extended state, and the open state. In the first embodiment, the end portion 11c is included in the other end portion 1b of the first belt member 1, and the end portion 11d is included in the one end portion 1a of the first belt member 1.

[0024] The adhesive layer 12 functions to bond the base material layer 11 and the member to be fixed, and is a layer that maintains the unextended state and the extended state of the fixing member 100. In the fixing member 100 in the open state, the adhesive layer 12 continues to function to bond the base material layer 11 and the member to be fixed. The adhesive layer 12 covers the entire surface 11a of the base material layer 11, but is not limited thereto. The thickness of the adhesive layer 12 is, for example, 5 μm or more and 100 μm or less. The adhesive layer 12 contains, for example, an adhesive. The adhesive is, for example, an acrylic adhesive, a rubber adhesive, a urethane adhesive, or a silicone adhesive. The adhesive strength of the adhesive material is measured by the measurement method shown in JIS Z 0237:2009 and is, for example, 13 N / cm or more and 17 N / cm or less.

[0025] A part of the next layer 12 is detachably adhered to the second belt member 2. By joining a part of the first belt member 1 and a part of the second belt member 2 to each other, the unextended state of the fixing member 100 is maintained. In the first embodiment, the above-mentioned part of the adhesive layer 12 includes a first adhesive part 12a and a second adhesive part 12b. The first adhesive part 12a functions as a main part of the first joint part 4, and the second adhesive part 12b, which is another part of the adhesive layer 12, functions as a main part of the second joint part 5. The first adhesive part 12a is a part located closer to the center of the adhesive layer 12 than the second adhesive part 12b in the longitudinal direction A. In the longitudinal direction A, the length of the first adhesive part 12a is, for example, not less than 2 times and not more than 50 times the length of the second adhesive part 12b. The second adhesive part 12b is a part that overlaps with the end 11c of the base material layer 11. Therefore, in the longitudinal direction A, it can be said that the first adhesive part 12a is located closer to the end 11d of the base material layer 11 than the second adhesive part 12b, and the second adhesive part 12b is located closer to the end 11c of the base material layer 11 than the first adhesive part 12a. Also, in the longitudinal direction A, it can be said that the second adhesive part 12b is located closer to the other end 2b of the second belt member 2 than the first adhesive part 12a. In the first embodiment, the first adhesive part 12a and the second adhesive part 12b are adjacent to each other, but it is not limited thereto. Note that the adhesive strength of the second adhesive part 12b corresponds to the above-mentioned shear strength.

[0026] Next, the configuration of the second belt member 2 will be described. The second belt member 2 is an extensible belt-like member that adheres to the adhesive layer 12 of the fixing member 100. It is separated from the fixing member 100, the unextended state is released, and the length of the long side of the second belt member 2 that is not extended is, for example, 5 mm or more and 150 mm or less, the length of the short side of the second belt member 2 is, for example, 2 mm or more and 30 mm or less, and the thickness of the second belt member 2 is, for example, 20 μm or more and 300 μm or less. In the first embodiment, the second belt member 2 is a belt-like member having a single-layer structure, and has a surface 2c (one surface) where the latching portion 3 is provided and a surface 2d (the other surface) located on the opposite side of the surface 2c in the thickness direction. Further, an embossed portion is provided on at least a part of the surface 2d. In other words, at least a part of the surface 2d is an uneven surface. Thereby, the adhesive strength between the surface 2c and the adhesive layer 12 and the adhesive strength between the surface 2d and the adhesive layer 12 can be shifted. Specifically, the adhesive strength between the surface 2d and the adhesive layer 12 can be set lower than the adhesive strength between the surface 2c and the adhesive layer 12. In the second belt member 2, a part of the surface 2c adheres to the first adhesive portion 12a of the adhesive layer 12, and a part of the surface 2d adheres to the second adhesive portion 12b of the adhesive layer 12.

[0027] The second belt member 2 is, for example, a resin film. From the viewpoint of extensibility, the resin material constituting the second belt member 2 includes not only polyolefins such as polyethylene and polypropylene but also elastomers. The type of elastomer is not particularly limited, and for example, it includes at least a styrene-based elastomer or an olefin-based elastomer. More specifically, examples of the elastomer include styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene / butylene-styrene block copolymer (SEBS), polyurethane, polyolefin (ethylene copolymer (for example, ethylene vinyl acetate, ethylene-propylene copolymer, ethylene-propylene-diene terpolymer), polypropylene copolymer, polypropylene homopolymer, etc.).

[0028] In the first embodiment, the resin material includes two different types of polyolefins (a first polyolefin and a second polyolefin) and an olefin-based elastomer that are different from each other. The composition ratio (PO:OE) of the total of the first polyolefin and the second polyolefin (PO) and the olefin-based elastomer (OE) in the resin material is, for example, 7:3 to 9:1. In other words, the proportion of the mass of the olefin-based elastomer in the total mass of the first polyolefin, the second polyolefin, and the olefin-based elastomer is, for example, 5 wt% or more and 30 wt% or less. On the other hand, the proportion 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. Thereby, both the extensibility and durability of the second belt member 2 can be ensured. Further, the composition ratio of the first polyolefin and the second polyolefin in the total of the first polyolefin and the second polyolefin is, for example, 1:3 to 1:1. In other words, the proportion occupied by the first polyolefin in the total is, for example, 17.5 wt% or more and 45 wt% or less. On the other hand, the proportion occupied by the second polyolefin in the total is, for example, 35 wt% or more and 67.5 wt% or less. In the first embodiment, the first polyolefin is polypropylene (PP), the second polyolefin is polyethylene (PE), and the composition ratio (PP:PE:OE) of the first polyolefin, the second polyolefin, and the olefin-based elastomer is, for example, 4:5:1, 2:6:2, 3:4:3, etc.

[0029] In addition to polyolefin and elastomer, the resin material constituting the second belt member 2 may contain other components. For example, the resin material may include a stiffening agent (for example, polyvinylstyrene, polystyrene, poly-α-methylstyrene, polyester, epoxy resin, coumarone-indene resin), a viscosity reducing agent, a plasticizer, a tackifier (for example, aliphatic hydrocarbon tackifier, aromatic hydrocarbon tackifier, terpene resin tackifier, hydrogenated terpene resin tackifier), a dye, a pigment, an antioxidant, an antistatic agent, an adhesive, an antiadhesive agent, a slip agent, a heat stabilizer, a light stabilizer, a foaming agent, glass bubbles, starch, a metal salt, microfibers, etc.

[0030] In the first embodiment, after the second band member 2 is stretched by 400% along the longitudinal direction A and then stretched by 360%, the load of the second band member 2 in the stretched state is greater than 0 N / 25 mm and less than 5.9 N / 25 mm. In this case, after the fixing member 100 in the stretched state or the open state is wound around the member to be fixed and the latching portion 3 is latched to the member to be fixed, the latching release of the latching portion 3 due to the above load is suppressed. In addition, the winding force of the second band member 2 on the member to be fixed can be favorably applied. Note that stretching the second band member 2 by 400% along the longitudinal direction A means 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.

[0031] In the first embodiment, in the second band member 2 included in the fixing member 100, the longitudinal direction A corresponds to a direction (details will be described later) orthogonal to the machine direction (MD direction) of the second band member 2. Further, the bending rigidity of the second band member 2 along the longitudinal direction A is, for example, 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less. Thereby, the non-stretched state of the second band member 2 can be favorably maintained. Further, the bending rigidity of the second band member 2 along the short side direction B is, for example, 0.02 gf·cm 2 / cm or more and 0.10 gf·cm 2 / cm or less, but is not limited thereto. Each bending rigidity of the second band member 2 is measured using, for example, 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 cut out from the second band member 2 with a size of MD direction: 5 cm and CD direction: 3 cm is prepared. Subsequently, the prepared test piece is fixed between chucks at 1 cm intervals so that the bending direction is in the MD direction, and bent to a maximum curvature of ±2.5 cm -1 or less. Thereby, the bending rigidity [gf·cm 2 / cm] of the second band member along the longitudinal direction A is calculated from the slope when the slope of the bending moment with respect to the curvature becomes constant.

[0032] The second belt member 2 has a bent portion 21 located closer to the center of the first belt member 1 than one end portion 2a, and a bent state holding portion 22 that adheres to the adhesive layer 12 so as to maintain the bent state of the bent portion 21.

[0033] The bent portion 21 is a portion where a crease is provided as the second belt member 2 bends in the unextended state, and is provided near one end portion 2a of the second belt member 2. In the unextended state, the bent portion 21 is located closest to one end portion 1a of the first belt member 1 in the second belt member 2. Therefore, in the longitudinal direction A, the bent portion 21 is located closer to the center of the first belt member 1 than one end portion 2a, and the other end portion 2b of the second belt member 2 is located on the opposite side of the bent portion 21 via one end portion 2a. For this reason, in the longitudinal direction A, the direction from the bent portion 21 toward one end portion 2a coincides with the direction from the bent portion 21 toward the other end portion 2b.

[0034] The bent state holding portion 22 is a portion in the second belt member 2 that maintains the bent state of the bent portion 21, and adheres to the second adhesive portion 12b of the adhesive layer 12. For this reason, the bent state holding portion 22 functions as a part of the main portion of the second joint portion 5. The bent state holding portion 22 is separated from the folded portion in the second belt member 2 and overlaps the first belt member 1. Further, the bent state holding portion 22 is located closer to the other end portion 2b than one end portion 2a and the bent portion 21 of the second belt member 2 in the longitudinal direction A. From the viewpoints of maintaining the bent state by the bent state holding portion 22 and easily releasing the bent state when the fixing member 100 is used, the length of the bent state holding portion 22 along the longitudinal direction A is, for example, 0.1 mm or more and 3 mm or less. In the first embodiment, an embossed portion is provided on the surface 2d corresponding to the bent state holding portion 22, but it is not limited thereto.

[0035] Of the surface 2d of the second belt member 2, a sign portion 23 is provided at a portion covered by one end portion 2a when the bent state is maintained. The sign portion 23 includes characters, numbers, symbols, etc. and is located on the surface 2d. The sign portion 23 may be ink printed on the surface 2d or a member provided on the surface 2d. When the fixing member 100 is in the unextended state and the extended state, the sign portion 23 is provided so as not to be visible by the second belt member 2 and the first belt member 1. On the other hand, when the fixing member 100 is in the open state, the sign portion 23 becomes visible to the user of the fixing member 100 and the like. By the characters, numbers, symbols included in the sign portion 23, for example, instructions, warnings, etc. for stopping further extension of the second belt member 2 are provided. In this case, when the user who has opened the fixing member 100 visually recognizes the sign portion 23, further extension (excessive extension) of the second belt member 2 is prevented. Thereby, the occurrence of breakage of the second belt member 2, destruction of the adhesion between the first belt member 1 and the second belt member 2 at the first adhesion portion 12a, etc. can be prevented.

[0036] The latching portion 3 is a hook member configured to be physically latched to the member to be fixed when the fixing member 100 is deployed. The latching portion 3 is, for example, a diaper hook member used for a diaper tab. The latching portion 3 includes a sheet base material and a plurality of hook members. The thickness of the sheet base material is, for example, about 20 μm or more and 100 μm or less. The average height of the hook members is, for example, 90 μm or more and 330 μm or less. Thereby, an effect that a specific portion is not likely to become thick when wound in a roll shape can be achieved (see FIG. 4 described later). The latching portion 3 is fixed to the second belt member 2 via an adhesive 6. The thickness of the adhesive 6 is, for example, 5 μm or more and 100 μm or less. The adhesive 6 contains, for example, an adhesive. The adhesive is, for example, an acrylic adhesive, a rubber adhesive, a urethane adhesive, or a silicone adhesive. The density at which the hook members are arranged is, for example, about 500 or more and 5000 or less per square inch.

[0037] Fig. 3(a) is a schematic plan view showing the latching portion, and Fig. 3(b) is a view showing a cross-section along line IIIb-IIIb in Fig. 3(a). As shown in Figs. 3(a) and 3(b), the latching portion 3 has a structure in which a plurality of hooks 32 are provided on a base material 31. The base material 31 has a strip shape and is a portion adhered to the adhesive 6. From the viewpoint of increasing the latching force to the member to be fixed, the length of the base material 31 along the longitudinal direction A is, for example, 2 mm or more, 3 mm or more, or 4 mm or more. From the viewpoint of material saving of the fixing member 100 and the like, the length of the base material 31 along the longitudinal 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 along the short-side direction B is approximately the same as the short-side length of the second belt member 2. The hook 32 has a substantially mushroom shape in side view, and has a stem portion 32a extending away from the second belt member 2 and an umbrella portion 32b formed at the tip of the stem portion 32a. The umbrella portion 32b has, for example, an elliptical shape having a major axis along the longitudinal direction A as viewed from the lamination direction. Thereby, when a force for the fixing member 100 to contract is generated in a state where the latching portion 3 is latched to the member to be fixed, the hook 32 easily bites into the member to be fixed. That is, the latching force of the latching portion 3 is more easily exerted. Note that the shape of the hook 32 is not limited thereto, and may be appropriately set based on the dimensions (length, width) of the fixing member, the degree of elongation, and the like. For example, as long as the latching force is satisfied, the hook 32 may have a hook shape, a T shape, a J shape, or the like.

[0038] FIG. 4 is a view showing the sheet that forms the basis of the fixing member 100 according to the first embodiment. As shown in FIG. 4, the sheet 51 that forms the basis of the fixing member 100 is a belt-shaped laminate that is mounted on a winding device or the like in a state of being wound around a roll 50. The sheet 51 may be wound around the roll 50 in a manner such that the unwinding direction and the rotation direction are parallel (flat winding), like a so-called toilet paper, or in a manner such that the unwinding direction and the rotation direction are oblique (bobbin winding), like a spool of thread. 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 is cut along a direction orthogonal to the extending direction and is fragmented corresponds to the fixing member 100. In the sheet 51, the direction in which it is wound around the roll 50 (that is, the above-mentioned extending direction) corresponds to the machine direction. Therefore, as described above, the machine direction of the fixing member 100 corresponds to the short side direction B. Here, the first belt member 1 constitutes one end of the fixing member 100, and the second belt member 2 constitutes the other end of the fixing member 100. In addition, the latching portion 3, the first joining portion 4, and the second joining portion 5 are provided so as not to overlap each other in the lamination direction. For this reason, in the sheet 51 wound around the roll 50, a specific portion is less likely to become thick, so that a high-quality sheet 51 can be formed.

[0039] Next, with reference to FIGS. 5 and 6, a specific example of the member to be fixed to which the fixing member 100 according to the first embodiment is applied, and a specific example of the function and effect achieved by the fixing member 100 will be described. FIG. 5 is a schematic view showing a state in which the fixing member in the unextended state is attached to the member to be fixed. FIG. 6 is a view showing a state (wrapped state) in which the second belt member is extended and the fixing member is wrapped around and fixed to the member to be fixed. As shown in FIG. 5, a disposable diaper 200, which is a specific example of an absorbent article that is the member to be fixed, has an absorber inside, a main body portion 201 provided with a pair of leg openings, and a waist portion 202 provided above the main body portion 201 and having a waist opening, which suppresses displacement when the wearer wears the disposable diaper 200. The main body portion 201 is composed of, for example, paper, non-woven fabric, and resin film. A pattern or the like may be printed on the outer surface of the main body portion 201.

[0040] When the fixing member 100 is in the unextended state, the adhesive layer 12 (see Fig. 1(b)) exposed by the fixing member 100 is attached to the main body portion 201 of the disposable diaper 200 which is the member to be fixed. In addition, the latching portion 3 of the fixing member 100 is latched to the main body portion 201. At this time, due to the miniaturization of the dimensions of the fixing member 100 (particularly the length of the long side of the fixing member 100), the fixing member 100 is attached to the main body portion 201 so as not to overlap with the waist portion 202. In this case, it becomes difficult for the fixing member 100 to contact the wearer of the disposable diaper 200, and the discomfort of the wearer can be reduced.

[0041] When the disposable diaper 200 is used and discarded, it is necessary to prevent the contents inside the disposable diaper 200 from leaking to the outside. For this purpose, for example, as shown in Fig. 6, by maintaining the state in which the disposable diaper 200 is rolled up and bundled by the fixing member 100, leakage of the above contents is prevented. Specifically, a user who pinches the latching portion 3 and releases the latching of the latching portion 3 pulls the second band member 2 along the longitudinal direction A so as to separate the second band member 2 from the first band member 1. At this time, the second band member 2 extends along the longitudinal direction A starting from the first band member 1. Thereby, the fixing member 100 can be wound around the disposable diaper 200 starting from the first band member 1. At this time, the joined state of the first band member 1 and the second band member 2 at the second joining portion 5 may be released. Finally, in the state where the fixing member 100 is wound around the disposable diaper 200, the latching portion 3 is latched to another portion of the disposable diaper 200. As described above, the wound state of the disposable diaper 200 can be well maintained by the fixing member 100.

[0042] Conventionally, a so-called Z-shaped fixing member may be used for a member to be fixed such as a disposable diaper. This Z-shaped fixing member includes three types of belt members as main members. On the other hand, according to the fixing member 100 according to the first embodiment, since it includes two types of belt members as main members, while showing the function as a fixing member, material savings is achieved compared with the above-described Z-shaped fixing member. For example, the weight per meter of the sheet 51 (see FIG. 4), which is the raw material of the fixing member 100 of the first embodiment, can be made less than half of the weight per meter of the sheet, which is the raw material of the conventional Z-shaped fixing member.

[0043] In the first embodiment, the length along the longitudinal direction A of the bending holding portion 22, which functions as one of the main portions of the second joint portion 5, is 3 mm or less. Thereby, before the joining state between the first belt member 1 and the second belt member 2 at the first joint portion 4 is released along with the pulling of the second belt member 2 along the longitudinal direction A, the joining state between the first belt member 1 and the second belt member 2 at the second joint portion 5 is more likely to be released. In addition, the length of the bending holding portion 22 along the longitudinal direction A is 0.1 mm or more. Thereby, the joining state between the first belt member 1 and the second belt member 2 at the second joint portion 5 is less likely to be released at an unintended timing such as during the conveyance of the member to be fixed.

[0044] In the first embodiment, on the surface 2d of the second belt member 2, in the portion covered by one end portion 2a when the bent state of the bending holding portion 22 is maintained, a sign portion 23 is provided. When the fixing member 100 is in the unextended state and the extended state, the sign portion 23 is covered by at least one of the first belt member 1 and the second belt member 2. On the other hand, when the fixing member 100 is in the open state, the user of the fixing member 100 can visually recognize the sign portion 23. Depending on the content indicated by the sign portion 23, by the user stopping the pulling of the second belt member 2 or the like, breakage of the second belt member 2, release of the joining state between the first belt member 1 and the second belt member 2 at the first joint portion 4, etc. are less likely to occur. That is, by providing the sign portion 23, breakage of the fixing member 100 during use is less likely to occur.

[0045] In the first embodiment, the second belt member 2 has a single-layer structure, and the bending rigidity of the second belt member 2 along the longitudinal direction A is 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less. In this case, since the hardness of the second belt member 2 can be reduced, the discomfort of the user touching the second belt member 2 can be alleviated. In addition, since the bent state of the bent portion 21 in the second belt member 2 is likely to be maintained, it is less likely that the bent state of the unintended bent portion 21 is released. The release of the bent state of the unintended bent portion 21 is likely to occur as the fixing member 100 is miniaturized. Therefore, when the fixing member 100 is miniaturized, it can be said that setting the bending rigidity of the second belt member 2 along the longitudinal direction A within the above range is particularly useful. Note that the bending rigidity of the second belt member 2 along the short-side direction B may be 0.02 gf·cm 2 / cm or more and 0.10 gf·cm 2 / cm or less.

[0046] In the first embodiment, the load of the second belt member 2 in a state where the second belt member 2 is stretched by 360% after being stretched by 400% along the longitudinal direction A may be greater than 0 N / 25 mm and less than 5.9 N / 25 mm. In this case, it is less likely that the restoring force of the second belt member 2 after stretching, the unintended release of the latching of the latching portion 3 to the fixed member or the like due to the self-stretching of the second belt member 2 itself after stretching, occurs.

[0047] In the first embodiment, an embossed portion is provided on the surface 2d of the second belt member 2. Thereby, the adhesive strength between the surface 2d and the adhesive layer 12 can be set lower than the adhesive strength between the surface 2c and the adhesive layer 12. Therefore, the joining state of the first belt member 1 and the second belt member 2 at the second joining portion 5 is likely to be released.

[0048] In the first embodiment, the second belt member 2 includes a first polyolefin, a second polyolefin, and an olefin-based elastomer, and the proportion of the mass of the olefin-based elastomer in 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 belt member 2 can exhibit good extensibility while having a single-layer structure.

[0049] FIG. 7 is a diagram showing a fixing member according to the first modification of the first embodiment. As shown in FIG. 7, the second belt member 2A in the fixing member 100A is different from the fixing member 100 of the first embodiment in that it does not have a bent portion 21 and a sign portion 23. Also, only the surface 2d of the second belt member 2 is adhered to the adhesive layer 12. Therefore, there is no open state in the fixing member 100A.

[0050] Also, with the fixing member 100A according to the first modification described above, the same operational effects as those of the first embodiment can be achieved. In addition, since there is no bending of the second belt member 2A, the second belt member 2A can be further miniaturized and material-saving. For example, the weight per meter of the sheet (refer to FIG. 4), which is the raw material of the fixing member 100A, can be made 1 / 3 or less of the weight per meter of the sheet, which is the raw material of the conventional Z-shaped fixing member. And since the second belt member 2A is extensible, the fixing of the member to be fixed by the fixing member 100A is well performed. Further, in the first modification, it is not necessary to consider the release of the bent state of the unintended bent portion, so that the manufacturing conditions can be facilitated and the yield can be improved.

[0051] Fig. 8(a) is a plan view of the fixing member according to the second modification of the first embodiment, and Fig. 8(b) is a view showing a cross section taken along line VIIIb-VIIIb of Fig. 8(a). Fig. 9 is a cross-sectional view showing the fixing member shown in Figs. 8(a) and (b) in a developed state. As shown in Figs. 8(a) and (b), the fixing member 100B is a so-called Z-shaped member including a third band member 301 and a tab 302 in addition to the first band member 1 and the second band member 2B. In the fixing member 100B, the first band member 1, the second band member 2B, and the third band member 301 that are sequentially laminated on each other are held in a folded state (laminated state). The fixing member 100B has a first joint portion 303 between one end portion 2a of the second band member 2B and the first band member 1, and a second joint portion 304 between the other end portion 2b of the second band member 2B and the third band member 301 as folding lines, and the first band member 1, the second band member 2B, and the third band member 301 are folded and laminated. For this reason, in the longitudinal direction A, the first joint portion 303 is located on one end side of the fixing member 100B, and the second joint portion 304 is located on the other end side of the fixing member 100B. In Fig. 8, for the sake 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 in the lamination direction, but originally, these are in close contact with each other in the lamination direction. The long side length of the fixing 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.

[0052] In the fixing member 100B, the above-mentioned folding lines can be eliminated, and the first band member 1, the second band member 2B, and the third band member 301 can be developed. As a result, as shown in Fig. 9, the developed fixing member 100B exhibits 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, in the fixing member 100B, a state in which the first band member 1, the second band member 2B, and the third band member 301 are arranged in sequence to form a single band shape is defined as the "developed state".

[0053] One end 1a of the first belt member 1 has a tab 302 adhered thereto. The tab 302 is a portion that serves as a gripping part when the fixing member 100B is deployed, and is adhered to the adhesive layer 12 so as to protrude from the end 11d of the base material layer 11 in the longitudinal direction A. From the viewpoint of easily determining the position of the tab 302 on the fixing member 100B, the tab 302 may be colored. The tab 302 is composed of, for example, a resin film, paper, or non-woven fabric. The thickness of the tab 302 is, for example, 30 μm or more and 100 μm or less. In the deployed fixing member 100B, the adhesive layer 12 functions as a layer that adheres the base material layer 11 and the member to be fixed. That is, in the fixing member 100B, the adhesive layer 12 is provided so as to be able to also function as the latching part 3 in the first embodiment.

[0054] The second belt member 2B is a member corresponding to the second belt member 2 of the first embodiment. That is, the second belt member 2B has a single-layer structure and exhibits extensibility. In addition, the bending rigidity of the second belt member 2B along the longitudinal direction A is 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less, and the bending rigidity of the second belt member 2B along the short transverse direction B is 0.02 gf·cm 2 / cm or more and 0.10 gf·cm 2 / cm or less, and the load of the second belt member 2B in a state where it is stretched by 360% after being stretched by 400% along the longitudinal direction A of the second belt member 2B is greater than 0 N / 25 mm and less than 5.9 N / 25 mm. When the fixing member 100B is in a laminated state, most of the surface 2c of the second belt member 2B is detachably adhered to the adhesive layer 12. For this reason, when the fixing member 100B is in a laminated state, the first belt member 1 and the second belt member 2B are in close contact, and their laminated state is maintained. Hereinafter, a state where the fixing member 100B is in a deployed state and the second belt member 2B is stretched is defined as an "extended state". If the second belt member 2B is stretched excessively, problems such as breakage of the second belt member 2B may occur.

[0055] An adhesive layer 305 (second adhesive layer) is provided on the surface 2d of the second belt member 2B. The adhesive layer 305 is a layer that maintains the laminated state of the fixing member 100B and is adhered to the adhesive layer 12 of the first belt member 1 at the first joint portion 303. In addition, the adhesive layer 305 is detachably adhered to the base material layer 311 (details will be described later) of the third belt member 301. Therefore, when the fixing member 100B is in a laminated state, the second belt member 2B and the third belt member 301 are in close contact via the adhesive layer 305, and their laminated state is maintained. The thickness of the adhesive layer 305 is, for example, 5 μm to 100 μm. The adhesive layer 305 is formed by applying an adhesive or the like to the surface 2d of the second belt member 2B. The adhesive contained in the adhesive layer 305 is, for example, the same as the adhesive constituting the adhesive layer 12.

[0056] The third belt member 301 is a portion that is pre-fixed to the member to be fixed in the fixing member 100B. Also, the third belt member 301 is a portion that becomes the other end in the longitudinal direction A in the deployed fixing member 100B. The third belt member 301 has a base material layer 311 and an adhesive layer 312.

[0057] The base material layer 311 is a belt-shaped member and has a surface 311a facing the second belt member 2B in the thickness direction and a surface 311b (one surface) located on the side opposite to the surface 311a in the thickness direction. The surface 311a is detachably adhered to the adhesive layer 305. An adhesive layer 312 is provided on the surface 311b. One end 311c of the base material layer 311 in the longitudinal direction A is exposed from the first belt member 1 and the second belt member 2B in a plan view. Also, the end 311d of the base material layer 311 in the longitudinal direction A is a portion that constitutes the second joint portion 304. In the fixing member 100B before use, the end 311d is folded back toward the second belt member 2B side. Therefore, at the end 311d, a part of the surface 311b faces the second belt member 2 side. The base material layer 311 is composed of, for example, a resin film, paper, or non-woven fabric. The resin constituting the base material layer 311 is, for example, the same as the resin constituting the base material layer 11.

[0058] The subsequent layer 312 is a layer that adheres the base material layer 311 and the member to be fixed. A part of the portion provided at the end 311d of the base material layer 311 in the adhesive layer 312 faces the second belt member 2B side and is directly adhered to the adhesive layer 305. For this reason, the second joint portion 304 between the second belt member 2B and the third belt member 301 is firmly adhered to each other by the adhesive layers 305 and 312. Therefore, even when the fixing member 100B is deployed, the second belt member 2B and the third belt member 301 are integrated at the second joint portion 304, and separation can be well suppressed. The thickness of the adhesive layer 312 is, for example, 5 μm to 100 μm. The adhesive layer 312 is formed by applying an adhesive or the like to the surface 311b of the base material layer 311. The adhesive contained in the adhesive layer 312 is, for example, the same as the adhesive constituting the adhesive layers 12 and 305.

[0059] The fixing member 100B according to the second modification described above is a so-called Z-shaped member. Here, the second band member included in the conventional Z-shaped fixing member generally has a three-layer structure in which an elastomer layer exhibiting extensibility is sandwiched by a core layer. On the other hand, the second band member 2B included in the fixing member 100B is extensible and has a single-layer structure. Therefore, compared with the conventional non-extensible Z-shaped fixing member, the fixing member 100B shows the function as a fixing member, and material savings are achieved in that the total length of the fixing member can be reduced by the amount of extension. In addition, since the second band member 2B is the same as the second band member 2 of the first embodiment, the bending rigidity of the second band member 2B is the same as the bending rigidity of the second band member 2. For this reason, the fold of the second band member 2B is likely to be maintained, and it is less likely that an unintentional release of the laminated state will occur. This unintentional release of the laminated state is likely to occur as the fixing member 100B is miniaturized. Therefore, the fixing member 100B is more likely to be miniaturized than the conventional Z-shaped fixing member, and further material savings are possible. Furthermore, the load of the second band member 2B in a state where it is extended by 360% after being extended by 400% along the longitudinal direction A may be greater than 0 N / 25 mm and less than 5.9 N / 25 mm. Thereby, it becomes difficult for an unintentional release of the fixing to the fixed member or the like of the fixing member 100B due to the restoring force of the second band member 2B after extension or the self-extension of the second band member 2B itself after extension to occur.

[0060] As described above, the present invention has been described in detail based on the above embodiments and modifications. However, the present invention is not limited to the above embodiments and the above modifications. The present invention can be further modified without departing from the gist thereof.

[0061] The embodiments of the present disclosure are shown below. [Aspect 1] A first band member having a belt-shaped base material layer and an adhesive layer located on one surface of the base material layer, An extensible second band member adhered to the adhesive layer, A latching portion fixed on one surface of the second band member and capable of latching onto a fixed member, Comprising, The longitudinal direction of the first belt member and the longitudinal direction of the second belt member are in the same direction. The second belt member has a first end portion that adheres to the adhesive layer, and a second end portion that is located on the opposite side of the first end portion in the longitudinal direction and to which the latching portion is fixed. Fixing member. [Embodiment 2] The second belt member further has a bent portion located closer to the center of the first belt member than the first end portion, and a bent portion holding portion that adheres to the adhesive layer so as to maintain the bent state of the bent portion. The bent portion holding portion is the fixing member according to Embodiment 1, which is located closer to the second end portion than the first end portion and the bent portion in the longitudinal direction. [Embodiment 3] The length of the bent portion holding portion along the longitudinal direction is 0.1 mm or more and 3 mm or less, and the fixing member according to Embodiment 2. [Embodiment 4] On the other surface of the second belt member, a sign portion is provided in a portion covered by the first end portion when the bent state is maintained, and the fixing member according to Embodiment 2 or 3. [Embodiment 5] The adhesive layer has a first adhesive portion that adheres to the first end portion and a second adhesive portion that adheres to the bent portion holding portion. The second adhesive portion is located closer to the second end portion than the first adhesive portion in the longitudinal direction. The first adhesive portion adheres to one surface of the second belt member, and the second adhesive portion adheres to the other surface of the second belt member, and the fixing member according to any one of Embodiments 2 to 4. [Embodiment 6] The base material layer includes a non-woven fabric, and the fixing member according to any one of Embodiments 1 to 5. [Embodiment 7] The second belt member has a single-layer structure. The bending rigidity of the second belt member along the longitudinal direction is 0.02 gf·cm 2 / cm or more and 0.10 gf·cm 2 / cm or less, and the fixing member according to any one of Embodiments 1 to 6. [Form 8] The bending rigidity of the second belt member along the short side direction orthogonal to the longitudinal direction is 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less, and the fixing member according to Form 7. [Form 9] A fixing member including a first belt member, a second belt member, and a third belt member laminated on each other, and held in a state where the first to third belt members are folded, having a first joint portion between the second belt member and the first belt member, and a second joint portion between the second belt member and the third belt member, each of the first belt member and the third belt member has a strip-shaped base material layer and an adhesive layer provided on one surface of the base material layer, the longitudinal direction of the first belt member, the longitudinal direction of the second belt member, and the longitudinal direction of the third belt member are in the same direction, the second belt member has an extensible single-layer structure, a second adhesive layer is provided on one surface of the second belt member, the adhesive layer included in the first belt member is detachably adhered to the second belt member, the second adhesive layer is detachably adhered to the third belt member, the bending rigidity of the second belt member along the longitudinal direction is 0.01 gf·cm 2 / cm or more and 0.09 gf·cm 2 / cm or less, a fixing member. [Form 10] The load of the second belt member in a state where the second belt member is stretched 360% after being stretched 400% along the longitudinal direction is greater than 0 N / 25 mm and less than 5.9 N / 25 mm, and the fixing member according to any one of Forms 1 to 9. [Form 11] An embossed portion is provided on the other surface of the second belt member, and the fixing member according to any one of Forms 1 to 10. [Form 12] The second belt member includes a first polyolefin, a second polyolefin, and an olefin-based elastomer, The ratio of the mass of the olefin-based elastomer in the total mass of the first polyolefin, the second polyolefin, and the olefin-based elastomer is 5% or more and 30% or less, and the fixing member according to any one of Forms 1 to 11. [Form 13] The fixing member according to any one of Forms 1 to 12, and a member to be fixed to which the fixing member adheres, and an absorbent article comprising the same. [Form 14] The absorbent article according to Form 13, which is a diaper for infants.

Example

[0062] 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.

[0063] (Experimental Example 1) FIG. 10(a) is a schematic cross-sectional view of the fixing member used in Experimental Example 1. In Experimental Example 1, as shown in FIG. 10(a), a fixing member 100G including a first band member 1 and a second band member 2 was formed. Specifically, first, 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 prepared. An adhesive layer 12 was provided on the entire one surface of the first band member 1. The short side lengths of the first band member 1 and the second band member 2 were 15 mm.

[0064] Next, a bent portion 21 was formed by bending a part including one end portion 2a of the second band member 2. Then, the one end portion 2a and the bent holding portion 22 of the second band member 2 were adhered to the adhesive layer 12. At this time, the adhesion portion between the first band member 1 and the second band member 2 was pressed with a 2 kg roll. After adhesion, the length L1 along the longitudinal direction A of the folded portion in the second band member 2 was 6 mm, and the length L2 along the longitudinal direction A of the bent holding portion 22 was 1 mm. Thus, the fixing member 100G was formed.

[0065] The first belt member 1 includes a polypropylene / polyethylene film with a thickness of 80 μm and a layered adhesive (thickness 35 μm). In Experimental Example 1, the adhesive constituting the adhesive layer is a styrene-isoprene-styrene based adhesive based on "Quintac 3270" manufactured by Nippon Zeon Co., Ltd. The adhesive strength of the adhesive defined in JIS Z 0237:2009 is 13 to 17 N / cm.

[0066] The second belt member 2 includes an extendable single layer with a thickness of 80 μm. The single layer is a mixed layer of polypropylene, polyethylene, and an olefin-based elastomer. The mixing ratio of polypropylene (PP), polyethylene (PE), and olefin-based elastomer (OE) was 3:4:3. The surface 2d of the second belt member 2 is not embossed.

[0067] (Experimental Example 2) In Experimental Example 2, the surface 2d of the second belt member 2 was embossed, and a fixing member was formed in the same manner as in Experimental Example 1 except that the embossed surface adhered to the adhesive layer in the bending holding portion 22.

[0068] <Tensile Test> Figure 10(b) is a schematic diagram showing a state where the fixing member is attached to a tensile testing machine. As shown in Figure 10(b), the fixing member 100G of Experimental Example 1 was gripped by the claws 501 and 502 of the tensile testing machine. Specifically, in the fixing member 100G, one end 1a of the first belt member 1 was gripped by the claw 501, and the other end 2b of the second belt member 2 was gripped by the claw 502. The distance between the claws 501 and 502 was set to 20 mm. In the fixing member 100G after being gripped by the claws 501 and 502, the length L3 of the free end of the second belt member 2 along the longitudinal direction A was 13 mm. Then, the fixing member 100G was pulled along the longitudinal direction A at a speed of 300 mm / min. As a result, the tensile stress (first tensile stress) when the fixing member 100G changed from the unextended state to the open state, and the tensile stress (second tensile stress) when the first belt member 1 and the second belt member 2 separated were measured. Also, the elongation length (first elongation length) of the second belt member 2 when the fixing member 100G changed from the unextended state to the open state, and the elongation length (second elongation length) of the second belt member 2 when the first belt member 1 and the second belt member 2 separated were measured. Note that the first tensile stress, the second tensile stress, the first elongation length, and the second elongation length were also measured for the fixing member formed in Experimental Example 2 by the same method. Note that the first elongation length is the length by which the second belt member 2 extended when the fixing member 100G changed from the unextended state to the open state. The second elongation length is the length obtained by subtracting the length L3 from the length of the second belt member 2 itself existing at the claws 501 and 502 when the first belt member 1 and the second belt member 2 separated.

[0069] In Experimental Example 1, the first tensile stress was about 20 N / 15 mm, and the second tensile stress was about 12 N / 15 mm. In Experimental Example 2, the first tensile stress was about 12 - 17 N / 15 mm, and the second tensile stress was about 11.5 N / 15 mm. From the above measurement results, it can be seen that the first tensile stress and the second tensile stress can be adjusted by the presence or absence of embossing on the second belt member 2. Also, from Experimental Examples 1 and 2, the first tensile stress may be a value smaller than when the second belt member breaks, for example, 5 N / 15 mm or more and less than 35 N / 15 mm. From the viewpoint of not impairing the usability as a waste tape, the first elongation length may be 40 mm or more.

[0070] In Experimental Example 1, the first elongation length was approximately 66 to 84 mm, and the second elongation length was approximately 121 to 141 mm. In Experimental Example 2, the first elongation length was approximately 63 to 82 mm, and the second elongation length was approximately 126 to 143 mm. From the above, it can be said that when the first tensile stress, that is, when the tension of the second band member 2 ended when the fixing member 100G changed from the unextended state to the open state, in both Experimental Examples 1 and 2, the user can usefully utilize the elongation of the second band member 2 without damaging the fixing member.

[0071] (Experimental Example 3) A base material with a total length of the first band member of 27 mm and a mixing ratio of polypropylene (PP): polyethylene (PE): olefin elastomer (OE) of 4:5:1 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 bending the second band member, and a hook member with 1600 pins / square inch was provided as a latching portion with a width of 6 mm at the other end of the second band member via an adhesive. A fixing member was formed in the same manner as in Experimental Example 1 except for the above. In the second band member, the length of the portion that was not joined to other members and could freely elongate was 13 mm. The portion of the adhesive layer of the first band member that was not joined to the second band member was attached to the outer surface of the main body of a commercially available disposable diaper, which was the member to be fixed. The load of the second band member in the state where the second band member was elongated by 360% after being elongated by 400% along the longitudinal direction A in Experimental Example 3 was 1.9 N / 25 mm.

[0072] (Experimental Example 4) As the second belt member, a fixing member was formed in the same manner as in Experimental Example 3, except that a film having a pair of skin layers exhibiting extensibility and a core layer positioned between the pair of skin layers was used. Each of the pair of skin layers is a layer mainly composed of a non-elastomeric olefin resin (PP / PE copolymer). The core layer is a layer of an elastomeric olefin resin (PP / PE copolymer). Among the adhesive layers of the first belt member, the portion not joined to the second belt member was attached to the outer surface of the main body of a commercially available disposable diaper, which is the member to be fixed. The load of the second belt member in the state where the second belt member was stretched by 360% after being stretched by 400% in the longitudinal direction A of the second belt member used in Experimental Example 4 was 5.9 N / 25 mm.

[0073] Each of the fixing members of Experimental Examples 3 and 4 was used. Specifically, first, 200 ml of water was absorbed by the main body of the disposable diaper. Next, with the fixing member in a stretched state, while pulling the free portion of the second belt-like member by 42 mm (400%), it was wound around the disposable diaper, and the latching portion was latched to different outer surfaces of the main body. In Experimental Example 3, even after standing for 12 hours from the latching, the latching of the disposable diaper by the latching portion was maintained. On the other hand, in Experimental Example 4, the latching of the disposable diaper by the latching portion was released 2 minutes after the latching. It is presumed that this was due to the restoring force of the second belt member after stretching, and the latching of the latching portion was released.

[0074] (Experimental Example 5) In Experimental Example 5, a fixing member having a cross-sectional Z shape with a cross-sectional shape shown in FIG. 8(b) was formed. Specifically, the first belt member of Experimental Example 1 with the long side length of 31 mm was used as the first belt member of Experimental Example 5. The long side length of the second belt member of Experimental Example 1 was set to 33 mm, and the same adhesive (thickness: 50 μm) as that of the first belt member was applied to it, which was used as the second belt member of Experimental Example 5. An adhesive (thickness: 50 μm) was applied to a polypropylene / polyethylene film (long side length 33 mm, thickness: 70 μm) in the same manner as the first belt member, and the same adhesive (thickness: 50 μm) as that of the third belt member of Experimental Example 5 was prepared. Subsequently, in the laminating apparatus, the joining of the first belt member and the second belt member (i.e., the formation of the first joint), and the joining of the second belt member and the third belt member (i.e., the formation of the second joint) were carried out. At this time, the long side length of each of the first joint and the second joint was set to 5 mm. In Experimental Example 5, the flexural rigidity of the second belt member along the longitudinal direction was 0.036 gf·cm 2 / cm.

[0075] (Experimental Example 6) As the second belt member, a fixing member was formed in the same manner as Experimental Example 5, except that the long side length of the second belt member of Experimental Example 2 was set to 33 mm and the same adhesive (thickness: 50 μm) as that of the first belt member was applied to it. In Experimental Example 6, the flexural rigidity of the second belt member along the longitudinal direction was 0.082 gf·cm 2 / cm.

[0076] (Experimental Example 7) A fixing member was formed in the same manner as Experimental Example 5, except that the long side length of the first belt member was set to 36 mm, the long side length of the second belt member was set to 56 mm, the long side length of the third belt member was set to 59 mm, and the second belt member was the second belt member of Experimental Example 4 to which an adhesive (styrene-isoprene-styrene-based adhesive based on "DX420" manufactured by Kuraray Polymer Japan Co., Ltd., thickness: 15 μm) was applied. In Experimental Example 7, the flexural rigidity of the second belt member along the longitudinal direction was 0.52 gf·cm 2 / cm. The adhesive force of the adhesive defined in JIS Z 0237:2009 and applied to the second belt member was 3.3 to 4.5 N / cm.

[0077] When a large number of fixing members of Experimental Examples 5 to 7 were formed, a part of the fixing member of Experimental Example 7 had the fold of the second belt member 2B not maintained, the adhesion of the first joint portion 303 came off, and the laminated state was unintentionally released. On the other hand, none of the fixing members of Experimental Examples 5 and 6 had an unintentional release of the laminated state. This is presumably because the bending rigidity along the longitudinal direction of the second belt member used in Experimental Examples 5 and 6 was 0.10 gf·cm 2 / cm or less, and thus no unintentional release of the laminated state due to the self-restoring force of the second belt member occurred.

Explanation of Reference Numerals

[0078] 1... First belt member, 1a... One end portion, 1b... The other end portion, 2, 2A, 2B... Second belt member, 2a... One end portion (first end portion), 2b... The other end portion (second end portion), 2c... Surface (one surface), 2d... Surface (the other surface), 3... Hooking portion, 4... First joint portion, 5... Second joint portion, 6... Adhesive, 11... Base material layer, 11a... Surface (one surface), 11b... Surface, 11c... End portion, 11d... End portion, 12... Adhesive layer, 12a... First adhesive portion, 12b... Second adhesive portion, 21... Bending portion, 22... Bending holding portion, 23... Sign portion, 31... Base material, 32... Hook, 32a... Stem portion, 32b... Umbrella portion, 50... Roll, 51... Sheet, 100, 100A, 100B, 100G... Fixing member, 200... Disposable diaper, 301... Third belt member, 302... Tab, 303... First joint portion, 304... Second joint portion, 305... Adhesive layer (second adhesive layer), 311... Base material layer, 311a... Surface, 311b... Surface (one surface), 311c... End portion, 311d... End portion, 312... Adhesive layer.

Claims

1. A first belt member having a strip-shaped base material layer and an adhesive layer located on one surface of the base material layer, An extendable second belt member adhered to the adhesive layer, A latching portion fixed on one surface of the second belt member and capable of being latched to a member to be fixed, comprising The longitudinal direction of the first belt member and the longitudinal direction of the second belt member are in the same direction, The second belt member A first end portion adhered to the adhesive layer, A second end portion located on the opposite side of the first end portion in the longitudinal direction and to which the latching portion is fixed, Fixing member.

2. The second belt member further has a bent portion located closer to the center side of the first belt member than the first end portion, and a bent portion holding portion adhered to the adhesive layer so as to maintain the bent state of the bent portion, The bent portion holding portion is located closer to the second end portion than the first end portion and the bent portion in the longitudinal direction. The fixing member according to claim 1.

3. The length of the bent portion holding portion along the longitudinal direction is 0.1 mm or more and 3 mm or less. The fixing member according to claim 2.

4. Among the other surface of the second belt member, a sign portion is provided on a portion covered by the first end portion when the bent state is maintained. The fixing member according to claim 2 or 3.

5. The adhesive layer has a first adhesive portion adhered to the first end portion and a second adhesive portion adhered to the bent portion holding portion, The second adhesive portion is located closer to the second end portion than the first adhesive portion in the longitudinal direction, The first adhesive portion adheres to the one surface of the second belt member, and the second adhesive portion adheres to the other surface of the second belt member. The fixing member according to claim 2 or 3.

6. The base material layer includes a non-woven fabric, and the fixing member according to any one of claims 1 to 3.

7. The second belt member has a single-layer structure, The bending rigidity of the second belt member along the longitudinal direction is 0.01 gf·cm ２ / cm or more and 0.09 gf·cm ２ / cm or less, and the fixing member according to any one of claims 1 to 3.

8. The bending rigidity of the second belt member along the short direction orthogonal to the longitudinal direction is 0.02 gf·cm ２ / cm or more and 0.10 gf·cm ２ / cm or less, and the fixing member according to claim 7.

9. A fixing member including a first belt member, a second belt member, and a third belt member laminated on each other, and the first to third belt members are held in a folded state, It has a first joint portion between the second belt member and the first belt member, and a second joint portion between the second belt member and the third belt member, Each of the first belt member and the third belt member has a belt-shaped base material layer and an adhesive layer provided on one surface of the base material layer, The longitudinal direction of the first belt member, the longitudinal direction of the second belt member, and the longitudinal direction of the third belt member are in the same direction, The second belt member has an extensible single-layer structure, A second adhesive layer is provided on one surface of the second belt member, The adhesive layer included in the first belt member is detachably adhered to the second belt member, The second adhesive layer is detachably adhered to the third belt member, The bending rigidity of the second belt member along the longitudinal direction is 0.01 gf·cm ２ / cm or more and 0.09 gf·cm ２ / cm or less, Fixing member.

10. The load of the second belt member in a state where it is stretched by 360% after being stretched by 400% along the longitudinal direction is greater than 0 N / 25 mm and less than 5.9 N / 25 mm. The fixing member according to any one of claims 1 to 3 and 8.

11. An embossed portion is provided on the other surface of the second belt member. The fixing member according to any one of claims 1 to 3 and 8.

12. The second belt member includes a first polyolefin, a second polyolefin, and an olefin-based elastomer. The proportion of the mass of the olefin-based elastomer in 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. The fixing member according to any one of claims 1 to 3 and 8.

13. The fixing member according to any one of claims 1 to 3 and 8, and a member to be fixed to which the fixing member adheres, An absorbent article comprising the same.

14. The absorbent article according to claim 13, which is a diaper for infants.

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