Laminated conductive fabric tape

Abstract

To provide a laminate conductive cloth tape capable of suppressing increase in a manufacturing cost, also suppressing an edge peeling, and capable of suppressing peeling of a plating in operating environments.SOLUTION: A laminate conductive cloth tape 20 is a three-ply structure or a four-ply structure in which a filler layer 24 is added to the three-ply structure, where the three-ply structure comprises a conductive cloth 21 that a metal plating is applied to a cloth material, an adhesive layer 22 formed on one side of the conductive cloth 21, and a thermoplastic resin layer 23 formed on the other side of the conductive cloth 21. The surface roughness Ra of the conductive cloth 21 is 11.9 or more. The Shore A-hardness of the thermoplastic resin layer 23 is 50 or more and 98 or less, and its thickness is 100 μm or more and 800 μm or less. The 100%-tensile modulus of the thermoplastic resin layer is 16.4 MPa or less if the thermoplastic resin layer comprises the filler layer 24.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a laminated conductive fabric tape. [Background technology]

[0002] Conventionally, laminated conductive fabric tapes have been known in which a pressure-sensitive adhesive layer is provided on a conductive nonwoven fabric that has been made conductive by metal plating (see, for example, Patent Document 1). However, because such laminated conductive fabric tapes are stored in a circularly wound state, the conductive nonwoven fabric and the pressure-sensitive adhesive layer located on the outer circumference are in contact with each other. Therefore, when an operator pulls out (unwinds) the laminated conductive fabric tape in a straight line, part of the metal plating on the conductive nonwoven fabric may peel off and adhere to the pressure-sensitive adhesive layer, reducing the adhesive strength of the pressure-sensitive adhesive layer. Therefore, laminated conductive fabric tapes have a problem of peeling off from the ends of electric wires when applied to them. Therefore, a laminated conductive fabric tape with a release paper provided on the pressure-sensitive adhesive layer has also been proposed (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-140950 [Patent Document 2] Japanese Patent Publication No. 2022-130302 Summary of the Invention [Problem to be solved by the invention]

[0004] However, as described in Patent Document 2, laminated conductive cloth tapes that have release paper require the release paper to be peeled off when manufacturing wire harnesses, etc., which makes it difficult to perform tasks such as half-wrapping while peeling the paper off, which can easily lead to increased manufacturing costs.

[0005] Furthermore, when the laminated conductive fabric tape is used in a vibration environment such as a vehicle, friction between the conductive fabric and peripheral devices can cause the plating to peel off, resulting in a decrease in shielding performance. To address this issue, it is possible to provide an exterior member to cover the laminated conductive fabric tape, but this would increase the size and cost of the product.

[0006] The present invention has been made to solve these conventional problems, and its object is to provide a laminated conductive cloth tape that can suppress increases in manufacturing costs, suppress edge peeling, and also suppress plating peeling in the usage environment. [Means for solving the problem]

[0007] The laminated conductive fabric tape according to the present disclosure is a three-layer laminated conductive fabric tape including a conductive fabric formed by plating a fabric material with metal, an adhesive layer formed on one side of the conductive fabric, and a thermoplastic resin layer formed on the other side of the conductive fabric, wherein the conductive fabric has a surface roughness Ra of 11.9 or more, and the thermoplastic resin layer has a Shore A hardness of 50 or more and 98 or less and a thickness of 100 μm or more and 800 μm or less. and a concave-convex structure in which polygonal peaks, such as hexagons or diamonds, protruding toward the other surface and valleys recessed toward the one surface and connecting the vertices of the polygonal peaks are continuous. .

[0008] The laminated conductive fabric tape according to the present disclosure is a four-layer laminated conductive fabric tape including a conductive fabric formed by plating a fabric material with metal, an adhesive layer formed on one side of the conductive fabric, a thermoplastic resin layer formed on the other side of the conductive fabric, and a filler layer interposed between the conductive fabric and the adhesive layer to prevent the adhesive layer from penetrating into the conductive fabric, wherein the conductive fabric has a surface roughness Ra of 11.9 or more, and the thermoplastic resin layer has a Shore A hardness of 50 or more and 98 or less and a thickness of 100 μm or more and 800 μm or less, and a concave-convex structure in which polygonal peaks, such as hexagons or diamonds, protruding toward the other surface and valleys recessed toward the one surface and connecting vertices of the polygonal peaks are continuous, The filler layer has a 100% tensile modulus of 16.4 MPa or less. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a laminated conductive cloth tape that can suppress increases in manufacturing costs, suppress edge peeling, and also suppress plating peeling in the usage environment. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a shielded wire having a laminated conductive fabric tape according to an embodiment of the present invention; [Figure 2] 2A and 2B are diagrams showing the configuration of the laminated conductive fabric tape shown in FIG. 1, in which (a) shows a cross section perpendicular to the longitudinal direction of the tape, and (b) shows an enlarged view of a portion of (a). [Figure 3] 1. FIG. 4 is a structural diagram showing another example of the laminated conductive fabric tape shown in FIG. 1, showing a cross section perpendicular to the longitudinal direction of the tape. [Figure 4] FIG. 2 is a first plan view showing the surface shape of a thermoplastic resin layer. [Figure 5] FIG. 4 is a second plan view showing the surface shape of the thermoplastic resin layer. [Figure 6] FIG. 4 is a third plan view showing the surface shape of the thermoplastic resin layer. [Figure 7] 1 is a first diagram showing examples and comparative examples. [Figure 8] 2 is a second diagram showing examples and comparative examples. [Figure 9] 10 is a third diagram showing examples and comparative examples. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described below in accordance with preferred embodiments. Note that the present invention is not limited to the embodiments shown below and can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiments shown below, some components are omitted from illustration and description, but it goes without saying that publicly known or well-known technologies are applied as appropriate to the details of the omitted technologies within the scope of the content described below.

[0012] Fig. 1 is a perspective view showing a shielded electric wire having a laminated conductive fabric tape according to an embodiment of the present invention. As shown in Fig. 1, the shielded electric wire 1 includes an electric wire 10 and a laminated conductive fabric tape 20 attached around the electric wire 10.

[0013] The electric wire 10 includes a conductor 11 made of, for example, copper, aluminum, or an alloy thereof, and an insulating sheath 12 that covers the conductor 11. In the example shown in Fig. 1, the conductor 11 of the electric wire 10 is a twisted wire made by twisting together a plurality of wires, but this is not limited to this and it may also be a single wire. Furthermore, the sheath 12 is assumed to be made of PVC (Polyvinyl Chloride), PP (Polypropylene), or PE (Polyethylene), but it is not limited to these and may also be made of silicone, polyurethane, nylon, etc.

[0014] Fig. 2 is a structural diagram showing the laminated conductive fabric tape 20 shown in Fig. 1, where (a) shows a cross section perpendicular to the longitudinal direction of the tape, and (b) shows an enlarged view of a portion of (a). As shown in Fig. 2(a), the laminated conductive fabric tape 20 has a three-layer structure including a conductive fabric 21, an adhesive layer 22, and a thermoplastic resin layer 23.

[0015] The conductive cloth 21 is a cloth material plated with metal. In this embodiment, as shown in FIG. 2(b), the conductive cloth 21 is configured to include, for example, fibers 21a constituting nonwoven fabric and plated portions 21b. The nonwoven fabric is a sheet-like member in which the fibers 21a are intertwined without being woven. As shown in FIG. 2(b), due to the manufacturing characteristics of this nonwoven fabric, the fibers 21a are formed as multiple layers in the thickness direction. The fibers 21a constituting such nonwoven fabric are configured, for example, from polyethylene terephthalate (PET), PP, nylon, acrylic, glass fiber, carbon fiber, aramid fiber, polyarylate fiber, etc.

[0016] The plated portion 21b is a conductive metal that coats the fibers 21a that make up the nonwoven fabric. This plated portion 21b is made of, for example, copper, nickel, tin, silver, or an alloy of these metals. The plated portion 21b may be formed as a single layer on the fibers 21a that make up the nonwoven fabric, or may be formed as multiple layers. Therefore, the plated portion 21b may be formed, for example, with copper (first layer) and tin (second layer) on the fibers 21a that make up the nonwoven fabric.

[0017] The conductive cloth 21 is not limited to the fibers 21a constituting a nonwoven fabric to which the plated portions 21b are applied, but may also be the fibers 21a constituting a woven fabric or knitted fabric to which the plated portions 21b are applied. Furthermore, the plated portions 21b are not limited to being applied to each individual fiber 21a, but may also be applied to the fabric material. That is, the former conductive cloth 21 is formed by first applying the plated portions 21b to the fibers 21a and then processing the fibers 21a with the plated portions 21b into a woven fabric, a nonwoven fabric, or the like. The latter conductive cloth 21 is formed by forming a woven fabric, a nonwoven fabric, or the like from the fibers 21a.

[0018] The adhesive layer 22 is formed on one side of the conductive cloth 21 and provides adhesiveness for attaching the laminated conductive cloth tape 20 to the covering 12 of the electric wire 10. The adhesive layer 22 is made of, for example, any one of acrylic resin, silicone resin, rubber-based adhesive (including NR (natural rubber) and SIS (styrene-isoprene-styrene rubber)), and urethane adhesive, or a combination thereof. When dynamic viscoelasticity measurement is performed on such adhesive layer 22 at a frequency of 1 Hz in an atmosphere of 25°C, the storage modulus G' of the adhesive layer 22 is 10 7 It is an adhesive that is less than

[0019] The thermoplastic resin layer 23 is formed on the other side of the conductive cloth 21. In this embodiment, the thermoplastic resin layer 23 is made of polyvinyl chloride (PVC), olefin resin (PP, PE), polyester, nylon, silicone, or the like.

[0020] Here, the conductive cloth 21 has a surface roughness Ra of 11.9 or more. Therefore, the surface of the conductive cloth 21 is roughened to a certain extent, resulting in a larger surface area compared to a non-roughened surface. This ensures a sufficient contact area between the conductive cloth 21 and the thermoplastic resin layer 23, resulting in stronger adhesion between the two. This prevents the thermoplastic resin layer 23 from peeling off and adhering to the adhesive layer 22 when the circumferentially wound laminated conductive cloth tape 20 is unwound. This prevents the thermoplastic resin layer 23 from adhering to the adhesive layer 22, which could reduce the adhesive strength of the adhesive layer 22, thereby preventing edge peeling.

[0021] Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 98 or less as measured with a JIS K6253 durometer type A and a thickness of 800 μm or less. This configuration limits the hardness and thickness of the thermoplastic resin layer 23. This allows the thermoplastic resin layer 23 to be formed to be somewhat soft and thin, which weakens the force with which the laminated conductive fabric tape 20 attached to the electric wire 10 attempts to return to its original shape, reducing the possibility of peeling at the end.

[0022] The thermoplastic resin layer 23 has a Shore A hardness of 50 or more and a thickness of 100 μm or more. This ensures that the thermoplastic resin layer 23 has a certain level of hardness and thickness, and can provide a certain level of protective function. This also makes it possible to prevent plating peeling in the usage environment.

[0023] Here, the laminated conductive fabric tape 20 is not limited to a three-layer structure and may be a four-layer structure. Fig. 3 is a structural diagram showing another example of the laminated conductive fabric tape 20 shown in Fig. 1, showing a cross section perpendicular to the tape longitudinal direction.

[0024] As shown in FIG. 3, a laminated conductive fabric tape 20 according to another example includes a sealing agent layer 24 in addition to the conductive fabric 21, adhesive layer 22, and thermoplastic resin layer 23 described above.

[0025] The filler layer 24 is interposed between the conductive cloth 21 and the adhesive layer 22, and prevents the adhesive layer 22 from penetrating into the conductive cloth 21. The filler layer 24 is made of any one of acrylic resin, silicone resin, urethane resin, phenolic resin, styrene resin, olefin resin, nylon resin, ethylene-vinyl acetate copolymer, polyester resin, etc., or a combination of these. A crosslinking agent may also be used in the filler layer 24.

[0026] Furthermore, the 100% tensile modulus of the sealer layer 24 after drying is set to 16.4 MPa or less. The 100% tensile modulus refers to the tensile load required to reach a 100% elongated state. That is, the load required for the sealer layer 24 to double in length after drying is 16.4 MPa or less. In this way, even when the sealer layer 24 is used, the sealer layer 24 has a limited hardness. This weakens the force with which the laminated conductive fabric tape 20 attached to the electric wire 10 attempts to return to its original shape, reducing the possibility of terminal peeling.

[0027] 4 to 6 are plan views showing the surface shape of the thermoplastic resin layer 23. As shown in Fig. 4 to 6, the thermoplastic resin layer 23 preferably has an uneven structure in which recessed valleys 23a on one surface and protruding peaks 23b on the other surface are continuous.

[0028] 4, the thermoplastic resin layer 23 has peaks 23b each having a hexagonal shape elongated in the width direction, which are continuously fitted together without gaps in the longitudinal and width directions, while the valleys 23a are formed so as to connect the vertices of the hexagons in the longitudinal and width directions.

[0029] 5, the peaks 23b are hexagons that are long in the width direction, and these hexagons fit together without gaps in the longitudinal and width directions to form a continuous structure. On the other hand, the valleys 23a are formed so as to connect opposing vertices of the hexagons.

[0030] 6, the thermoplastic resin layer 23 has a structure in which the peaks 23b are diamond-shaped and elongated in the width direction, and these peaks 23b are continuously fitted together without gaps in the longitudinal and width directions. On the other hand, the valleys 23a are formed so as to form the diagonals of the diamond.

[0031] When the shielded electric wire 1 (see FIG. 1 ) is bent during installation in a vehicle or the like, the laminated conductive fabric tape 20 having the thermoplastic resin layer 23 with such an uneven structure stretches the unevenness on the outside of the bend and becomes flat. On the other hand, the unevenness on the inside of the bend deepens, bringing adjacent peaks 23b closer to each other. In this way, the uneven structure of the thermoplastic resin layer 23 allows the tape to easily conform to bending.

[0032] The uneven structure of the thermoplastic resin layer 23 is not limited to those shown in Figs. 4 to 6. For example, it may be a structure in which valleys 23a and peaks 23b that simply extend linearly in the width direction are alternately formed, or such valleys 23a and peaks 23b may be formed at a slight incline with respect to the width direction. Furthermore, the valleys 23a and peaks 23b may be formed in a checkerboard pattern. In other words, the shape of the valleys 23a and peaks 23b is not particularly limited as long as they can follow the bending process.

[0033] Next, examples and comparative examples will be described. Figs. 7 to 9 are diagrams showing examples and comparative examples. In the following, the surface roughness Ra was obtained as follows. First, an operator cut out a sample of conductive cloth to have a width of 50 mm and a length of 100 mm. Next, using a surface roughness meter SJ-201 (manufactured by Mitutoyo), the operator set the evaluation length Ln to 12.5 mm, arranged the sample in the longitudinal direction, performed measurements at room temperature, and read the displayed arithmetic mean roughness. Furthermore, the operator calculated the average value of three arithmetic mean roughness measurements, and this value was used as the final surface roughness Ra.

[0034] The Shore A hardness was measured by reading the reading after 10 seconds using a type A hardness tester (durometer) conforming to JIS K 7215 on a thermoplastic resin sample molded to a thickness of 6 mm using a press molding machine.

[0035] Furthermore, the 100% tensile modulus (referred to as "100% modulus" in the table) was measured as follows. First, the sealant was coated and dried to form a sample with a thickness of 50 μm, width of 100 mm, and length of 100 mm, and rolled into a cylindrical shape. Then, the coated, dried, and rolled cylindrical sealant was cut into a cross-sectional area of ​​10 mm. 2 The worker then used a tensile tester to pull the molded body at a speed of 5 mm / s with the chuck gripping distance set to 10 mm, and measured the load at which the molded body was stretched 10 mm (100%) by pulling as the 100% tensile modulus.

[0036] The following examples and comparative examples were produced as follows. First, a T-die film molding machine was used to melt a thermoplastic resin at 200°C and coat it on a conductive cloth to a desired thickness to form a thermoplastic resin layer. Then, if a filler was to be provided on the surface opposite the thermoplastic resin layer, the filler was applied to a desired thickness and dried at 120°C for 3 minutes to form a filler layer. Next, if a filler layer was provided, a pressure-sensitive adhesive was applied to a desired thickness on the filler layer, or if a filler layer was not provided, on the conductive cloth, and dried at 120°C for 5 minutes to form a pressure-sensitive adhesive layer. After formation, the laminated conductive cloth tape was wound up into a circular shape.

[0037] First, the laminated conductive fabric tape according to Example 1 used a copper-plated nonwoven fabric as the conductive fabric. The surface roughness Ra of the conductive fabric was 11.9. The thermoplastic resin layer was made of PVC with a Shore A hardness of 98 and a thickness of 100 μm. The laminated conductive fabric tape did not include a sealing agent layer, and the pressure-sensitive adhesive layer was made of DIC's product number W-314 and a thickness of 40 μm.

[0038] The laminated conductive fabric tape of Example 2 was the same as that of Example 1, except that the surface roughness Ra of the conductive fabric was 23.3 and the thickness of the thermoplastic resin layer was 200 μm.

[0039] The laminated conductive fabric tape of Example 3 was made of copper-plated woven fabric as the conductive fabric. The surface roughness Ra of the conductive fabric was 20.8. The other specifications were the same as those of Example 2.

[0040] The laminated conductive cloth tape of Example 4 was the same as that of Example 1, except that the thickness of the thermoplastic resin layer was 800 μm.

[0041] The laminated conductive fabric tape of Example 5 was the same as that of Example 1, except that the thickness of the thermoplastic resin layer was 200 μm and a filler layer was provided. The filler layer had a 100% tensile modulus of 0.1 MPa and a thickness of 50 μm.

[0042] The laminated conductive fabric tape of Example 6 was the same as Example 5 except that the 100% tensile modulus of the sealing agent layer was set to 16.4 MPa.

[0043] The laminated conductive fabric tape of Example 7 was the same as Example 2, except that the thermoplastic resin layer was made of PP with a Shore A hardness of 95.

[0044] The laminated conductive fabric tape of Example 8 was the same as Example 2, except that the thermoplastic resin layer was made of PE with a Shore A hardness of 93.

[0045] The laminated conductive fabric tape of Example 9 was the same as Example 5 except that the surface roughness Ra of the conductive fabric was 23.3 and the thickness of the filler layer was 25 μm.

[0046] The laminated conductive cloth tape of Example 10 was the same as that of Example 9, except that the thickness of the adhesive layer was 65 μm.

[0047] The laminated conductive cloth tape of Example 11 was the same as that of Example 10, except that the adhesive layer was made of Orivine BPW6570 (manufactured by Toyochem).

[0048] The laminated conductive fabric tape of Comparative Example 1 was the same as that of Example 1 except that it did not include a thermoplastic resin layer.

[0049] The laminated conductive cloth tape of Comparative Example 2 was the same as that of Example 1, except that the thickness of the thermoplastic resin layer was set to 50 μm.

[0050] The laminated conductive fabric tape of Comparative Example 3 was the same as Example 1, except that the thermoplastic resin layer was made of PVC with a Shore A hardness of 25 and a thickness of 100 μm.

[0051] The laminated conductive fabric tape of Comparative Example 4 was the same as Comparative Example 3 except that it was made of a woven conductive fabric with a surface roughness of Ra 8.8.

[0052] The laminated conductive fabric tape of Comparative Example 5 was the same as Comparative Example 3 except that the thickness of the thermoplastic resin layer was 850 μm.

[0053] The laminated conductive cloth tape of Comparative Example 6 was the same as Example 6 except that the thermoplastic resin layer had a Shore A hardness of 25, a thickness of 100 μm, and a 100% tensile modulus of the sealing agent layer of 16.5 MPa.

[0054] The laminated conductive fabric tape of Comparative Example 7 was the same as that of Example 1, except that the Shore A hardness of the thermoplastic resin layer was 100.

[0055] The above-described Examples 1 to 11 and Comparative Examples 1 to 7 were evaluated in three points: adhesion, tape edge peeling, and tape abrasion test. Adhesion was evaluated by a T-peel test.

[0056] For the T-peel test, an operator cut a sample of the laminated conductive fabric tape to a width of 19 mm and a length of 250 mm, and placed the thermoplastic resin layer on one side of the chuck of the tensile tester and the conductive fabric on the other. The operator then peeled the sample at a speed of 300 mm / min and recorded the tensile load value. Of the five average tensile load values ​​obtained in this way, a value of 2 N or more was evaluated as "◎," a value of 1 N to less than 2 N was evaluated as "○," and a value of less than 1 N was evaluated as "×."

[0057] The laminated conductive fabric tape was wrapped around a 10mm diameter mandrel, left at 80°C for one week, and evaluated for peeling at the tape ends. Peeling of 1.0mm or less was evaluated as "◎", peeling of more than 1.0mm but less than 2.0mm was evaluated as "○", and peeling of 2.0mm or more was evaluated as "×".

[0058] For the tape abrasion test, the laminated conductive fabric tape was cut into test pieces of appropriate length, and the sheet was attached to a 10mm diameter aluminum pipe. The test piece was then placed in an abrasion resistance tester specified in JASO D 608, and a load of 4.4N was applied. The abrasion tape was then moved at a speed of 1500mm / min, and the tape length until it came into contact with the aluminum pipe was recorded. Tape lengths of 300mm or more were evaluated as "◎", those between 100mm and 300mm were evaluated as "○", and those less than 100mm were evaluated as "×".

[0059] As a result of the evaluation, the three-layer laminated conductive fabric tapes of Examples 1 to 4, 7, and 8 were all rated "good" or "double circle" in the adhesion, tape edge peeling, and tape abrasion tests. Therefore, it was found that the three-layer laminated conductive fabric tape only needs to have a surface roughness Ra of 11.9 or more, a Shore A hardness of 93 to 98 for the thermoplastic resin layer, and a thickness of 100 μm to 800 μm.

[0060] The adhesive layer remains soft even in the state of the laminated conductive fabric tape in order to maintain adhesiveness, and does not affect adhesion, tape abrasion tests, or tape edge peeling.

[0061] In contrast, the laminated conductive fabric tape of Comparative Example 1, which does not have a thermoplastic resin layer, was rated "X" in both the tape edge peeling and tape abrasion tests. Furthermore, the laminated conductive fabric tape of Comparative Example 2, even when it has a thermoplastic resin layer made of PVC with a Shore A hardness of 98, was found to be rated "X" in the tape abrasion test if its thickness was less than 100 μm.

[0062] Furthermore, the laminated conductive fabric tape of Comparative Example 3 had a Shore A hardness of 25 for the thermoplastic resin layer, which was insufficient, resulting in a tape abrasion test score of "×." The laminated conductive fabric tape of Comparative Example 4 had a surface roughness Ra of less than 11.9, resulting in a tape adhesion score of "×." This indicates that the thermoplastic resin layer adheres to the adhesive layer when the tape is unwound. Furthermore, the laminated conductive fabric tape of Comparative Example 5 had a thermoplastic resin layer thickness of over 800 μm, which resulted in the thermoplastic resin layer becoming too thick and attempting to return to its original shape, resulting in a tape edge peel score of "×." The laminated conductive fabric tape of Comparative Example 7 had a Shore A hardness of over 98 for the thermoplastic resin layer, resulting in the thermoplastic resin layer becoming too hard and attempting to return to its original shape, resulting in a tape edge peel score of "×."

[0063] Furthermore, the four-layer laminated conductive fabric tapes of Examples 5, 6, and 9 to 11 were evaluated as "good" or "excellent" in all of the adhesion, tape edge peeling, and tape abrasion tests. Therefore, it was found that a four-layer laminated conductive fabric tape is sufficient if it has a surface roughness Ra of 11.9 or more, a thermoplastic resin layer with a Shore A hardness of 98, and a thickness of 200 μm. It was also found that a 100% tensile modulus of 16.4 MPa or less is sufficient for the filler layer.

[0064] In contrast to this, it was found that when the 100% tensile modulus exceeded 16.4 MPa as shown in Comparative Example 6, the sealing agent layer became too hard and tried to return to its original shape, resulting in peeling at the tape end and resulting in a rating of "X."

[0065] As described above, the laminated conductive fabric tape 20 according to this embodiment has a three-layer structure consisting of a conductive fabric 21, an adhesive layer 22, and a thermoplastic resin layer 23. The conductive fabric has a surface roughness Ra of 11.9 or greater. This ensures a sufficient contact area between the conductive fabric 21 and the thermoplastic resin layer 23, resulting in stronger adhesion between the two. This reduces the possibility of the thermoplastic resin layer 23 peeling off and adhering to the adhesive layer 22 when the laminated conductive fabric tape 20 is unwound, thereby reducing edge peeling. Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 98 or less and a thickness of 800 μm or less. This limits the overall hardness of the thermoplastic resin layer 23, reducing the possibility of edge peeling when the laminated conductive fabric tape 20 adheres to the electric wire 10 and attempts to return to its original shape. Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 50 or greater and a thickness of 100 μm or greater, providing a certain level of abrasion resistance and preventing plating peeling during use. In particular, the prevention of edge peeling and plating peeling is achieved without the need for release paper or the need for half-wrapping while peeling the release paper, thereby reducing manufacturing costs. Therefore, it is possible to provide a laminated conductive cloth tape 20 that can reduce manufacturing costs, prevent edge peeling, and also prevent plating peeling in the usage environment.

[0066] The laminated conductive fabric tape 20 according to this embodiment has a four-layer structure consisting of the conductive fabric 21, the adhesive layer 22, the thermoplastic resin layer 23, and the filler layer 24. This reduces the possibility of edge peeling due to the adhesive layer 22 permeating into the conductive fabric 21 and reducing the amount of adhesive layer 22 contributing to adhesion. Furthermore, the 100% tensile modulus of the filler layer 24 is 16.4 MPa or less, which reduces the possibility of edge peeling due to the laminated conductive fabric tape 20 attached to the electric wire 10 attempting to return to its original shape due to the filler layer 24 being too hard. This results in a laminated conductive fabric tape 20 that can suppress edge peeling while minimizing manufacturing costs and also suppresses plating peeling during use.

[0067] Furthermore, the thermoplastic resin layer 23 has an uneven structure in which recessed valleys 23a on one side are continuous with protruding peaks 23b on the other side. Therefore, when the laminated conductive fabric tape 20 is attached to the electric wire 10 and then installed inside a vehicle, the unevenness on the outside of the bend becomes flat and expands when the electric wire is bent, while the unevenness on the inside of the bend becomes deeper and compresses, making it easier to follow the bend.

[0068] The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and modifications may be made within the scope of the spirit of the present invention, and if possible, publicly known or well-known technologies may be combined.

[0069] For example, in the above embodiment, the laminated conductive fabric tape 20 is attached to one electric wire 10, but it is not limited to one electric wire 10, and may be attached to a plurality of electric wires 10. [Explanation of symbols]

[0070] 1: Shielded wire 10: Electric wire 20: Laminated conductive fabric tape 21: Conductive cloth 22: Adhesive layer 23:Thermoplastic resin layer 23a: Tanibe 23b: Yamabe 24: Filler layer

Claims

1. A laminated conductive cloth tape having a three-layer structure including a conductive cloth formed by plating a cloth material with a metal, an adhesive layer formed on one side of the conductive cloth, and a thermoplastic resin layer formed on the other side of the conductive cloth, The conductive cloth has a surface roughness Ra of 11.9 or more, The thermoplastic resin layer has a Shore A hardness of 50 or more and 98 or less, a thickness of 100 μm or more and 800 μm or less, and has an uneven structure in which polygonal peaks, which are hexagonal or rhombic, protruding toward the other surface and valleys, which are recessed toward the one surface and connect the vertices of the polygonal peaks, are continuous. A laminated conductive cloth tape characterized by:

2. A laminated conductive cloth tape having a four-layer structure including a conductive cloth formed by plating a cloth material with a metal, an adhesive layer formed on one side of the conductive cloth, a thermoplastic resin layer formed on the other side of the conductive cloth, and a filler layer interposed between the conductive cloth and the adhesive layer to prevent the adhesive layer from penetrating into the conductive cloth, The conductive cloth has a surface roughness Ra of 11.9 or more, the thermoplastic resin layer has a Shore A hardness of 50 or more and 98 or less, a thickness of 100 μm or more and 800 μm or less, and has an uneven structure in which polygonal peaks, such as hexagons or diamonds, protruding toward the other surface and valleys recessed toward the one surface and connecting vertices of the polygonal peaks are continuous, The filler layer has a 100% tensile modulus of 16.4 MPa or less. A laminated conductive cloth tape characterized by:

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