Laminate conductive cloth 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 cloth tape. [Background technology]

[0002] Conventionally, a laminated conductive fabric tape is known in which an adhesive layer is provided on a conductive nonwoven fabric that is made conductive by metal plating the nonwoven fabric (see, for example, Patent Document 1). Here, since such a laminated conductive fabric tape is stored in a circular roll, the conductive nonwoven fabric and the adhesive located on the outer side of the circular roll are in contact with each other. Therefore, when an operator pulls out (unrolls) the laminated conductive fabric tape in a straight line from this state, a part of the metal plating of the conductive nonwoven fabric may peel off and adhere to the adhesive layer, thereby reducing the adhesive strength of the adhesive layer. Therefore, when the laminated conductive fabric tape is applied to an electric wire, there is a problem that the end peeling occurs, that is, the end peeling occurs. Therefore, a laminated conductive fabric tape in which a release paper is provided on the 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] JP 2022-130302 A Summary of the Invention [Problem to be solved by the invention]

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

[0005] In addition, when the laminated conductive fabric tape is used in a vibration environment such as a vehicle, the conductive fabric rubs against the surrounding equipment, causing 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 result in an increase in size and cost.

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

[0007] The laminated conductive cloth tape of the present disclosure is a three-layer laminated conductive cloth tape comprising a conductive cloth having a metal plating applied to a cloth material, 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, wherein the conductive cloth 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.

[0008] In addition, the laminated conductive cloth tape of the present disclosure is a four-layer laminated conductive cloth tape including a conductive cloth having a metal plating on a cloth material, 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, wherein 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 and a thickness of 100 μm or more and 800 μm or less, and the filler layer has a 100% tensile modulus of 16.4 MPa or less. Effect 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, prevent edge peeling, and also prevent plating peeling in the usage environment. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a shielded wire having a laminated conductive cloth tape according to an embodiment of the present invention; [Diagram 2] 2A and 2B are diagrams showing the configuration of the laminated conductive cloth 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). [Diagram 3] 2 is a configuration diagram showing another example of the laminated conductive cloth tape shown in FIG. 1, showing a cross section perpendicular to the tape longitudinal direction. FIG. [Figure 4] FIG. 2 is a first plan view showing the surface shape of a thermoplastic resin layer. [Diagram 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 a thermoplastic resin layer. [Figure 7] 1 is a first table showing examples and comparative examples. [Figure 8] 2 is a second table showing examples and comparative examples. [Figure 9] 3 is a third chart showing examples and comparative examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0012] Fig. 1 is a perspective view showing a shielded electric wire having a laminated conductive cloth 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 cloth 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 coating 12 that coats the conductor 11. In the example shown in Fig. 1, the conductor 11 of the electric wire 10 is a twisted wire in which a plurality of wires are twisted together, but the present invention is not limited to this and may be a single wire. Furthermore, the coating 12 is assumed to be made of PVC (Polyvinyl Chloride), PP (Polypropylene), or PE (Polyethylene), but the present invention is not limited to this and may be made of silicone, polyurethane, nylon, or the like.

[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 tape longitudinal direction, 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 a 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 nature of the manufacturing process, the fibers 21a of this nonwoven fabric are formed as multiple layers in the thickness direction. The fibers 21a constituting such a nonwoven fabric are, for example, polyethylene terephthalate (PET), PP, nylon, acrylic, glass fiber, carbon fiber, aramid fiber, polyarylate fiber, and the like.

[0016] The plated portion 21b is a conductive metal that coats the fibers 21a that constitute the nonwoven fabric. The 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 in a single layer on the fibers 21a that constitute the nonwoven fabric, or may be formed in multiple layers. For this reason, the plated portion 21b may be formed, for example, with copper (first layer) and tin (second layer) on the fibers 21a that constitute the nonwoven fabric.

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

[0018] The adhesive layer 22 is formed on one side of the conductive cloth 21 and exhibits adhesiveness for attaching the laminated conductive cloth tape 20 to the covering portion 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 of these. When dynamic viscoelasticity measurement is performed at a frequency of 1 Hz in an atmosphere at 25° C., such adhesive layer 22 has a storage modulus G' of 10 7 It is an adhesive that is less than.

[0019] The thermoplastic resin layer 23 is formed on the other surface 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 conductive cloth 21 has a surface roughened to a certain degree or more, and has a larger surface area than a surface that is not rough. This ensures a contact area between the conductive cloth 21 and the thermoplastic resin layer 23, and the two are more firmly attached to each other. 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. In other words, this prevents the thermoplastic resin layer 23 from adhering to the adhesive layer 22, which may reduce the adhesive strength of the adhesive layer 22, and thus prevents the end peeling.

[0021] Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 98 or less as measured by a JIS K6253 durometer type A, and a thickness of 800 μm or less. By configuring in this manner, the hardness and thickness of the thermoplastic resin layer 23 are limited. This allows the thermoplastic resin layer 23 to be formed to be somewhat soft and thin, which weakens the force of the laminated conductive cloth tape 20 attached to the electric wire 10 to return to its original shape, thereby reducing the possibility of the end peeling off.

[0022] The thermoplastic resin layer 23 has a Shore A hardness of 50 or more and a thickness of 100 μm or more. Therefore, the thermoplastic resin layer 23 has a certain degree of hardness and thickness, and can exert a certain level of protective function. Therefore, peeling of the plating in the usage environment can be suppressed.

[0023] Here, the laminated conductive cloth tape 20 is not limited to a three-layer structure, but may be a four-layer structure. Fig. 3 is a structural diagram showing another example of the laminated conductive cloth 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 above-mentioned conductive fabric 21, adhesive layer 22, and thermoplastic resin layer 23.

[0025] The sealant 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 sealant 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. The sealant layer 24 may contain a crosslinking agent.

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

[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 valley portions 23a on one surface side and peak portions 23b protruding on the other surface side are continuous.

[0028] 4, the thermoplastic resin layer 23 has peaks 23b each having a hexagonal shape that is elongated in the width direction, and these peaks 23b are fitted 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 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 are fitted 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 rhombus in which the peaks 23b are elongated in the width direction, and these peaks 23b are fitted 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 form the diagonals of the rhombus.

[0031] In the laminated conductive fabric tape 20 including the thermoplastic resin layer 23 having such an uneven structure, when the shielded electric wire 1 (see FIG. 1) is bent during installation in a vehicle or the like, the unevenness is stretched and flattened on the outside of the bend. On the other hand, the unevenness of the laminated conductive fabric tape 20 becomes deeper on the inside of the bend, and adjacent peaks 23b are closer to each other. In this way, the uneven structure of the thermoplastic resin layer 23 makes it easier to follow the bend.

[0032] The uneven structure of the thermoplastic resin layer 23 is not limited to those shown in Fig. 4 to Fig. 6. For example, the valleys 23a and peaks 23b simply extending linearly in the width direction may be alternately formed, or the valleys 23a and peaks 23b may be formed slightly inclined with respect to the width direction. Furthermore, the valleys 23a and peaks 23b may be formed in a checkered pattern. In other words, the shape of the valleys 23a and peaks 23b is not particularly important as long as they can follow the bending process.

[0033] Next, examples and comparative examples are 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, the operator used a surface roughness meter SJ-201 (manufactured by Mitutoyo) to set the evaluation length Ln to 12.5 mm, arranged the sample in the longitudinal direction, measured at room temperature, and read the displayed arithmetic mean roughness. Furthermore, the operator calculated the average value of three arithmetic mean roughnesses, and determined this value as the final surface roughness Ra.

[0034] In addition, the Shore A hardness was measured by reading the indicated value after 10 seconds using a JIS K 7215-compliant durometer A type for a thermoplastic resin sample molded to a thickness of 6 mm using a press molding machine.

[0035] Furthermore, the measurement of 100% tensile modulus (referred to as "100% modulus" in the table) was carried out as follows. First, the sealant was coated and dried to obtain 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 a chuck gripping distance of 10 mm, and measured the load at which the molded body was elongated by 10 mm (100%) as the 100% tensile modulus.

[0036] The following examples and comparative examples were manufactured as follows. First, a T-die film molding machine was used, and a thermoplastic resin was melted at 200°C and coated on the conductive cloth to a desired thickness to form a thermoplastic resin layer. Then, when a filler was provided on the surface opposite to 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, when a filler layer was provided, an adhesive was applied to a desired thickness on the conductive cloth, or when a filler layer was not provided, an adhesive layer was formed by drying at 120°C for 5 minutes. After formation, the laminated conductive cloth tape was wound up in a circumferential 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 cloth tape of Example 2 was the same as that of Example 1, except that the surface roughness Ra of the conductive cloth was 23.3 and the thickness of the thermoplastic resin layer was 200 μm.

[0039] The laminated conductive cloth tape of Example 3 used a copper-plated woven cloth as the conductive cloth. The surface roughness Ra of the conductive cloth was 20.8. The other aspects 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 cloth 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 cloth tape of Example 6 was the same as Example 5, except that the 100% tensile modulus of the filling agent layer was 16.4 MPa.

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

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

[0045] The laminated conductive cloth tape of Example 9 was the same as Example 5 except that the surface roughness Ra of the conductive cloth 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 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 Orivine BPW6570 (manufactured by Toyochem).

[0048] The laminated conductive cloth 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 50 μm.

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

[0051] The laminated conductive cloth tape of Comparative Example 4 was the same as Comparative Example 3, except that the conductive cloth was made of woven cloth with a surface roughness of Ra8.8.

[0052] The laminated conductive cloth 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 cloth 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-mentioned Examples 1 to 11 and Comparative Examples 1 to 7 were evaluated in three points, namely, adhesion, tape edge peeling, and tape abrasion test. The adhesion was evaluated by a T-peel test.

[0056] For the T-peel test, the operator cuts a sample of the laminated conductive cloth tape to a width of 19 mm and a length of 250 mm, and places the thermoplastic resin layer on one side of the chuck of the tensile tester, and the conductive cloth on the other side. The operator then peels the sample off at a speed of 300 mm / min, and reads the tensile load value at this point. Of the tensile load values ​​obtained in this way over five runs, those that were 2N or more were evaluated as "◎", those that were 1N or more but less than 2N were evaluated as "○", and those that were less than 1N were evaluated as "×".

[0057] The laminated conductive fabric tape was wrapped around a φ10 mm mandrel, left at 80°C for one week, and evaluated for peeling at the tape ends. A peeling amount of 1.0 mm or less was evaluated as "◎", a peeling amount between 1.0 mm and 2.0 mm was evaluated as "○", and a peeling amount of 2.0 mm or more was evaluated as "×".

[0058] Regarding the tape abrasion test, the laminated conductive fabric tape was cut into test pieces of appropriate length, and the sheet was attached to a φ10mm aluminum pipe, which was then set 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 the aluminum pipe and the tape came into contact was read. Tape lengths of 300mm or more were evaluated as "◎", those between 100mm and less than 300mm were evaluated as "○", and those less than 100mm were evaluated as "×".

[0059] As a result of the evaluation, the three-layer laminated conductive cloth tapes of Examples 1 to 4, 7, and 8 were rated as "good" or "excellent" in all of the adhesion, tape edge peeling, and tape abrasion tests. Therefore, it was found that the three-layer laminated conductive cloth 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 under extreme conditions in order to maintain adhesiveness even in the state of the laminated conductive cloth tape, and has almost no effect on 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 end peeling and tape abrasion tests. Also, it was found that 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 rated "X" in the tape abrasion test when its thickness was less than 100 μm.

[0062] Furthermore, the laminated conductive fabric tape according to Comparative Example 3 was found to have a Shore A hardness of 25 for the thermoplastic resin layer, which was insufficient, and was therefore rated as "x" in the tape abrasion test. The laminated conductive fabric tape according to Comparative Example 4 was found to have a surface roughness Ra of less than 11.9, and therefore rated as "x" in adhesion. That is, it was found that the thermoplastic resin layer adheres to the adhesive layer side when the tape is unwound. Furthermore, the laminated conductive fabric tape according to Comparative Example 5 was found to have a thickness of more than 800 μm for the thermoplastic resin layer, which was too thick and tried to return to its original shape, and therefore rated as "x" in tape end peeling. The laminated conductive fabric tape according to Comparative Example 7 was found to have a Shore A hardness of more than 98 for the thermoplastic resin layer, which was too hard and tried to return to its original shape, and therefore rated as "x" in tape end peeling.

[0063] Furthermore, as a result of the evaluation, the four-layer laminated conductive cloth tapes of Examples 5, 6, and 9 to 11 were all rated as "good" or "good" in the adhesion, tape edge peeling, and tape abrasion tests. Therefore, it was found that the four-layer laminated conductive cloth tape only needs to have a surface roughness Ra of 11.9 or more, the thermoplastic resin layer only needs to have a Shore A hardness of 98, and the thickness only needs to be 200 μm. It was also found that the filler layer only needs to have a 100% tensile modulus of 16.4 MPa or less.

[0064] In contrast, 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 attempted to return to its original shape, resulting in peeling at the tape end, resulting in a rating of "X."

[0065] Thus, the laminated conductive cloth tape 20 according to the present embodiment has a three-layer structure of the conductive cloth 21, the adhesive layer 22, and the thermoplastic resin layer 23, and the conductive cloth has a surface roughness Ra of 11.9 or more. This ensures a contact area with the thermoplastic resin layer 23 formed on the conductive cloth 21, and the two are more firmly attached to each other. As a result, the possibility that the thermoplastic resin layer 23 peels off and adheres to the adhesive layer 22 side when the laminated conductive cloth tape 20 is unwound can be suppressed, and the terminal peeling can be suppressed. Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 98 or less and a thickness of 800 μm or less. Therefore, the overall hardness of the thermoplastic resin layer 23 is limited, and the possibility that the laminated conductive cloth tape 20 attached to the electric wire 10 will return to its original shape and lead to terminal peeling can be reduced. Furthermore, the thermoplastic resin layer 23 has a Shore A hardness of 50 or more and a thickness of 100 μm or more, so that it can exhibit a certain level of abrasion resistance and can also suppress plating peeling in the usage environment. In particular, in order to prevent the above-mentioned peeling at the terminals and peeling of the plating, there is no need to use a release paper, and there is no need to perform operations such as half-wrapping while peeling off the release paper, which helps to prevent an increase in manufacturing costs. Therefore, it is possible to provide a laminated conductive cloth tape 20 that can prevent an increase in manufacturing costs, prevent peeling at the terminals, and also prevent peeling of the plating in the usage environment.

[0066] Moreover, the laminated conductive cloth tape 20 according to the present embodiment has a four-layer structure including the conductive cloth 21, the adhesive layer 22, the thermoplastic resin layer 23, and the filler layer 24. This reduces the possibility that the adhesive layer 22 will penetrate into the conductive cloth 21 due to the filler layer 24, reducing the amount of the adhesive layer 22 that contributes to adhesion, which may lead to end peeling. Furthermore, since the 100% tensile modulus of the filler layer 24 is 16.4 MPa or less, this reduces the possibility that the laminated conductive cloth tape 20 attached to the electric wire 10 will return to its original shape due to the filler layer 24 being too hard, which may lead to end peeling. As a result, it is possible to provide a laminated conductive cloth tape 20 that can suppress an increase in manufacturing cost, suppress end peeling, and also suppress plating peeling in the usage environment.

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

[0068] The present invention has been described above based on an embodiment, but the present invention is not limited to the above embodiment, and modifications may be made without departing from the spirit of the present invention, and if possible, known or well-known technologies may be combined.

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

[0070] 1: Shielded wire 10: Electric wire 20:Laminated conductive cloth 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, and a thickness of 100 μm or more and 800 μm or less. A laminated conductive cloth tape characterized by:

2. A laminated conductive cloth tape having a four-layer structure comprising: a conductive cloth made of a cloth material plated 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 and a thickness of 100 μm or more and 800 μm or less, The filler layer has a 100% tensile modulus of 16.4 MPa or less. A laminated conductive cloth tape characterized by:

3. The thermoplastic resin layer has an uneven structure in which recessed valleys on one side and protruding peaks on the other side are continuous.

3. The laminated conductive cloth tape according to claim 1 or 2.

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