Laminated conductive cloth adhesive tape

Abstract

A laminated conductive cloth adhesive tape with a three-layer structure comprises a conductive cloth made of a metal-plated cloth material; an adhesive layer formed on one surface side of the conductive fabric; and a thermoplastic resin layer formed on the other surface side of the conductive fabric. The conductive fabric has a surface roughness Ra of 11.9 or more. The thermoplastic resin layer has a Shore A hardness of 50 to 98 inclusive and a thickness of 100 to 800 [mu] m inclusive.

Description

Technical Field

[0001] The present disclosure relates to a laminated conductive cloth tape. Background Art

[0002] In the related art, a laminated conductive cloth tape is known in which an adhesive layer is provided on a conductive non-woven fabric made conductive by coating the non-woven fabric with a metal (for example, see JP2021-140950A). Here, since this laminated conductive cloth tape is stored while being wound in the circumferential direction, the conductive non-woven fabric and the adhesive located outside the conductive non-woven fabric are in contact with each other. Therefore, when the operator pulls out (unwinds) the laminated conductive cloth tape in a straight line from this state, a portion of the metal plating on the conductive non-woven fabric may peel off and adhere to the adhesive layer, and the adhesive strength of the adhesive layer may be reduced.

[0003] Therefore, there is a problem that when the laminated conductive cloth tape is attached to the wire, edge peeling occurs, that is, the tape peels off from its edge. Therefore, a laminated conductive cloth tape having a release paper provided on the adhesive layer is proposed (for example, see JP2022-130302A).

[0004] However, as described in JP2022-130302A, for a laminated conductive cloth tape including release paper, the release paper needs to be peeled off when manufacturing a wire harness, etc. For example, the work of winding a half-wrap while peeling off the release paper is difficult, which tends to increase manufacturing costs.

[0005] Furthermore, when the laminated conductive cloth tape is used in a vibrating environment such as a vehicle, friction between the conductive cloth and surrounding devices may cause the plating to peel off, thereby reducing shielding performance. Therefore, it is conceivable to further provide an external member to cover the laminated conductive cloth tape, but in this case, the use of the external member leads to an increase in size and cost.

[0006] Public Content

[0007] The present disclosure is made to solve such problems in the related art, and an object of the present disclosure is to provide a laminated conductive cloth tape capable of suppressing an increase in manufacturing cost, suppressing edge peeling, and suppressing peeling of a plating layer in a use environment.

[0008] According to one aspect of the present disclosure, there is provided a laminated conductive cloth tape with a three-layer structure, comprising: a conductive cloth made of a metal-plated cloth material; an adhesive layer formed on one surface side of the conductive cloth; and a thermoplastic resin layer formed on the other surface side of the conductive cloth, wherein the conductive cloth has a surface roughness Ra of greater than 11.9, wherein the thermoplastic resin layer has a Shore A hardness of greater than 50 and less than 98, and a thickness of greater than 100 μm and less than 800 μm.

[0009] According to another aspect of the present disclosure, a laminated conductive cloth tape with a four-layer structure is provided, comprising: a conductive cloth made of a metal-plated cloth material; an adhesive layer formed on one surface side of the conductive cloth; a thermoplastic resin layer formed on the other surface side of the conductive cloth; and a sealant layer placed 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, wherein 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, wherein the sealant layer has a 100% tensile modulus of 16.4 MPa or less.

[0010] According to the present disclosure, it is possible to provide a laminated conductive cloth tape that can suppress an increase in manufacturing cost, suppress edge peeling, and suppress peeling of a plating layer in a use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present disclosure will be more fully understood from the detailed description given hereinafter and the accompanying drawings which are given by way of illustration only and thus do not limit the present disclosure, in which:

[0012] Figure 1 is a perspective view showing a shielded electric wire with laminated conductive cloth tape according to an embodiment of the present disclosure;

[0013] Figure 2A and 2B It is shown Figure 1 The structure diagram of the laminated conductive fabric tape shown in FIG. Figure 2A A cross section orthogonal to the longitudinal direction of the tape is shown, Figure 2B Shows Figure 2A A partial enlarged view of

[0014] Figure 3 It is shown Figure 1 A structural diagram of another example of a laminated conductive fabric tape is shown, showing a cross section orthogonal to the longitudinal direction of the tape;

[0015] Figure 4 is a first plan view showing a surface shape of a thermoplastic resin layer;

[0016] Figure 5 is a second plan view showing the surface shape of the thermoplastic resin layer;

[0017] Figure 6 is a third plan view showing the surface shape of the thermoplastic resin layer;

[0018] Figure 7 is a first graph showing examples and comparative examples;

[0019] Figure 8is a second graph showing examples and comparative examples; and

[0020] Fig. 9 3rd graph which shows Example and comparative example. DETAILED DESCRIPTION

[0021] Hereinafter, the present disclosure will be described with reference to preferred embodiments. The present disclosure is not limited to the embodiments to be described below, and the embodiments may be appropriately changed without departing from the scope of the present disclosure. In the embodiments described below, there may be portions in which illustration and description of a portion of the configuration are omitted, and needless to say, within the scope not contradictory to the contents described below, known or well-known techniques are appropriately applied to the details of the omitted techniques.

[0022] Figure 1 is a perspective view showing a shielded electric wire with a laminated conductive fabric tape according to an embodiment of the present disclosure. Figure 1 As shown, the shielded electric wire 1 includes an electric wire 10 and a laminated conductive cloth tape 20 attached around the electric wire 10 .

[0023] The electric wire 10 includes a conductor 11 made of, for example, copper, aluminum, or an alloy thereof, and an insulating cover 12 covering the conductor 11. Figure 1 In the example shown, the conductor 11 of the electric wire 10 is a stranded wire obtained by twisting a plurality of electric wires, but is not limited thereto and may be a single electric wire. In addition, the covering portion 12 is assumed to be made of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene (PE), but the material is not limited thereto and may be silicone, polyurethane, nylon, etc.

[0024] Figure 2A and Figure 2B It is shown Figure 1 The structure of the laminated conductive fabric tape 20 is shown in FIG. Figure 2A A cross section orthogonal to the longitudinal direction of the tape is shown, Figure 2B Shows Figure 2A A partial enlarged view of Figure 2A As shown, the laminated conductive cloth tape 20 includes a conductive cloth 21, an adhesive layer 22, and a thermoplastic resin layer 23, and has a three-layer structure.

[0025] The conductive cloth 21 is made of a metal-plated cloth. Figure 2B As shown in FIG. 1 , the conductive cloth 21 includes, for example, fibers 21a constituting a nonwoven cloth and a plated portion 21b. The nonwoven cloth is a sheet-like member in which the fibers 21a are entangled but not woven. Figure 2BAs shown, the fibers 21a of the nonwoven fabric are formed into multiple layers in the thickness direction during the manufacturing process. The fibers 21a constituting the nonwoven fabric are made of, for example, polyethylene terephthalate (PET), polypropylene, nylon, acrylic, glass fiber, carbon fiber, aramid fiber, polyarylate fiber, etc.

[0026] The electroplating part 21b is a conductive metal covering the fibers 21a constituting the non-woven fabric. The electroplating part 21b is made of, for example, copper, nickel, tin, silver, or an alloy of these metals. The electroplating part 21b can be formed as a single layer on the fibers 21a constituting the non-woven fabric, or can also be formed as a multilayer. Therefore, the electroplating part 21b can be formed on the fibers 21a constituting the non-woven fabric, for example, by copper (first layer) and tin (second layer).

[0027] It should be noted that the conductive cloth 21 is not limited to a cloth in which the plating portion 21b is applied to the fibers 21a constituting a non-woven fabric, but may be a cloth in which the plating portion 21b is applied to the fibers 21a constituting a woven fabric or a knitted fabric. In addition, the plating portion 21b is not limited to being applied to each individual fiber 21a, but may be applied to the cloth material. That is, the former conductive cloth 21 is formed by applying the plating portion 21b to the fibers 21a, and then processing the fibers 21a with the plating portion 21b to form a woven fabric or a non-woven fabric. In addition, the latter conductive cloth 21 is formed by forming a woven fabric or a non-woven fabric from the fibers 21a, and then applying the plating portion 21b.

[0028] The adhesive layer 22 is formed on one surface side of the conductive cloth 21 and exhibits adhesiveness for attaching the laminated conductive cloth tape 20 to the cover 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 natural rubber (NR) or styrene-isoprene-styrene rubber (SIS)) and polyurethane adhesive or a combination thereof. Such an adhesive layer 22 is a material having a storage modulus G' of less than 10 when dynamic viscosity is measured in an atmosphere at 25°C and a frequency of 1 Hz. 7 Adhesive.

[0029] The thermoplastic resin layer 23 is formed on the other surface side of the conductive cloth 21. In the present embodiment, the thermoplastic resin layer 23 is made of polyvinyl chloride (PVC), olefin resin (PP, PE), polyester, nylon, silicone, or the like.

[0030] Here, the surface roughness Ra of the conductive cloth 21 is 11.9 or more. Therefore, the surface of the conductive cloth 21 is roughened to a certain extent, and the surface area is larger than the case where the surface is not roughened. Therefore, the contact area between the conductive cloth 21 and the thermoplastic resin layer 23 is ensured, and the conductive cloth 21 and the thermoplastic resin layer 23 are brought into close contact with each other more firmly. Therefore, when the circumferentially wound laminated conductive cloth tape 20 is unwound, the thermoplastic resin layer 23 is prevented from peeling off and adhering to the adhesive layer 22. That is, the possibility that the thermoplastic resin layer 23 adheres to the adhesive layer 22, resulting in a decrease in the adhesive strength of the adhesive layer 22, can be reduced, thereby preventing edge peeling.

[0031] In addition, the thermoplastic resin layer 23 has a Shore A hardness of 98 or less as measured by JIS K 6253 durometer type A and a thickness of 800 μm or less. With this configuration, the hardness and thickness of the thermoplastic resin layer 23 are limited. As a result, the thermoplastic resin layer 23 is formed to be soft and thin to a certain extent, thereby weakening the force of the laminated conductive cloth tape 20 attached to the electric wire 10 trying to restore to the original shape, thereby reducing the possibility of edge peeling.

[0032] 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 hardness and thickness equal to or greater than a certain level and can exhibit a protective function at a certain level or more. Therefore, it is also possible to suppress the peeling of the plating layer in the use environment.

[0033] Here, the laminated conductive cloth tape 20 is not limited to a three-layer structure, and may be a four-layer structure. Figure 3 It is shown Figure 1 The configuration diagram of another example of the laminated conductive cloth tape 20 is shown, showing a cross section orthogonal to the longitudinal direction of the tape.

[0034] like Figure 3 As shown, a laminated conductive cloth tape 20 according to another example includes a sealant layer 24 in addition to the above-mentioned conductive cloth 21 , adhesive layer 22 , and thermoplastic resin layer 23 .

[0035] The sealant layer 24 is placed between the conductive cloth 21 and the adhesive layer 22, and is used to prevent 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, polyurethane resin, phenolic resin, styrene resin, olefin resin, nylon resin, ethylene-vinyl acetate copolymer, polyester resin, etc., or a combination thereof. In addition, a cross-linking agent may be used in the sealant layer 24.

[0036] In addition, the 100% tensile modulus of the sealant layer 24 after drying is 16.4 MPa or less. The 100% tensile modulus indicates the tensile load required to reach a 100% elongated state. That is, after drying, the load required until the length of the sealant layer 24 doubles is 16.4 MPa or less. Thus, even if the sealant layer 24 is used, the hardness of the sealant layer 24 is limited. As a result, the force with which the laminated conductive cloth tape 20 attached to the electric wire 10 attempts to return to its original shape is weakened, thereby reducing the possibility of edge peeling.

[0037] Figures 4 to 6 2 is a plan view showing the surface shape of the thermoplastic resin layer 23. Figures 4 to 6 As shown, the thermoplastic resin layer 23 preferably has a concavo-convex structure in which a valley portion 23 a recessed toward one surface side and a mountain portion 23 b protruding toward the other surface side are continuous.

[0038] Specifically, in Figure 4 In the example shown, the thermoplastic resin layer 23 has hexagonal peaks 23b that are long in the width direction, and these peaks are fitted together without any gaps in the longitudinal and width directions to form a continuous structure. In addition, the valleys 23a are formed to connect the vertices of the hexagons in the longitudinal and width directions.

[0039] exist Figure 5 In the example shown, the peaks 23b are also hexagonal in shape that is long in the width direction, and these peaks are fitted together without any gap in the longitudinal direction and the width direction to form a continuous structure. In addition, the valleys 23a are formed to connect the opposite vertices of the hexagon.

[0040] exist Figure 6 In the example shown, the thermoplastic resin layer 23 has rhombus-shaped peaks 23b that are long in the width direction, and these peaks are fitted together without any gap in the longitudinal direction and the width direction to form a continuous structure. In addition, the valleys 23a are formed to connect the diagonal lines of the rhombus.

[0041] For the laminated conductive cloth tape 20 including the thermoplastic resin layer 23 having such a concavo-convex structure, when the shielded electric wire 1 (see Figure 1 ) is bent to be wired to a vehicle, etc., the concavoconvex is stretched and flattened on the outside of the bent portion. In addition, in the laminated conductive cloth tape 20, the concavoconvex on the inside of the bent portion becomes deeper, and the adjacent mountain portions 23b are close to each other. In this way, since the thermoplastic resin layer 23 has a concavoconvex structure, it can easily follow the bend.

[0042] The concavo-convex structure of the thermoplastic resin layer 23 is not limited to Figures 4 to 6Those shown. For example, the concavo-convex structure may be a structure in which valleys 23a and hills 23b extending simply in a straight line in the width direction are alternately formed, or may be a structure in which such valleys 23a and hills 23b are slightly inclined relative to the width direction. In addition, the valleys 23a and hills 23b may be formed in a checkerboard pattern. That is, the shapes of the valleys 23a and hills 23b are not particularly limited as long as they can follow the curve.

[0043] Examples and comparative examples will be described below. Figures 7 to 9 is a chart showing embodiments and comparative examples. The surface roughness Ra is obtained as follows. First, the operator cuts a conductive cloth sample having a width of 50 mm and a length of 100 mm. Next, using a surface roughness meter SJ-201 (manufactured by Mitutoyo), the operator sets the evaluation length Ln to 12.5 mm, arranges the samples in the longitudinal direction, measures at room temperature, and reads the displayed arithmetic mean roughness. In addition, the operator calculates the average of three arithmetic mean roughness measurement values, and sets the calculated average as the final surface roughness Ra.

[0044] The Shore A hardness is measured by reading the indicated value after 10 seconds using a type A durometer (hardness tester) conforming to JIS K 7215 on a thermoplastic resin sample having a thickness of 6 mm molded using a compression molding machine.

[0045] In addition, the measurement of 100% tensile modulus (referred to as "100% modulus" in the table) was performed as follows. First, the coated and dried sealant was rolled into a cylindrical shape to prepare a sample having a thickness of 50 μm, a width of 100 mm, and a length of 100 mm. Thereafter, the coated, dried, and rolled cylindrical sealant was molded into a sample having a cross-sectional area of ​​10 mm. 2 Thereafter, using a tensile tester, the operator sets the clamping distance of the chucks to 10 mm, stretches the molded product at a speed of 5 mm / s, and measures the load at which the molded body is elongated by 10 mm (100%) due to the stretching as 100% tensile modulus.

[0046] In addition, the following embodiments and comparative examples are manufactured as follows. First, a thermoplastic resin is melted at 200°C using a T-type film forming machine, and the thermoplastic resin is applied to a conductive cloth to a desired thickness to form a thermoplastic resin layer. Thereafter, when a sealant is provided on the surface opposite to the thermoplastic resin layer, the sealant is applied to the desired thickness and dried at 120°C for three minutes to form a sealant layer. Next, an adhesive is applied to the filler layer in the case where a sealant layer is provided, or to the conductive cloth in the case where a sealant layer is not provided, to the desired thickness, and then dried at 120°C for five minutes to form an adhesive layer. After formation, the laminated conductive cloth tape is wound circumferentially.

[0047] First, in the laminated conductive cloth tape according to Example 1, a copper-plated nonwoven fabric was used as the conductive cloth. The surface roughness Ra of the conductive cloth was 11.9. The thermoplastic resin layer was made of PVC having a Shore A hardness of 98 and a thickness of 100 μm. In addition, the laminated conductive cloth tape did not include a sealant layer, and the adhesive layer was made of DIC product number W-314 and had a thickness of 40 μm.

[0048] The laminated conductive cloth tape according to 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.

[0049] In the laminated conductive cloth tape according to Example 3, a copper-plated woven cloth is used as the conductive cloth. The surface roughness Ra of the conductive cloth is 20.8. The rest is the same as that of Example 2.

[0050] The laminated conductive cloth tape according to Example 4 is the same as that of Example 1, except that the thickness of the thermoplastic resin layer is 800 μm.

[0051] The laminated conductive cloth tape according to Example 5 was the same as that of Example 1, except that the thickness of the thermoplastic resin layer was 200 μm and a sealant layer was provided. The 100% tensile modulus of the sealant layer was 0.1 MPa, and the thickness was 50 μm.

[0052] The laminated conductive cloth tape according to Example 6 is the same as that of Example 5, except that the 100% tensile modulus of the sealant layer is 16.4 MPa.

[0053] The laminated conductive cloth tape according to Example 7 is the same as that of Example 2, except that the thermoplastic resin layer is made of polypropylene having a Shore A hardness of 95.

[0054] The laminated conductive cloth tape according to Example 8 is the same as that of Example 2, except that the thermoplastic resin layer is made of polyethylene having a Shore A hardness of 93.

[0055] The laminated conductive cloth tape according to Example 9 was the same as that of Example 5, except that the surface roughness Ra of the conductive cloth was 23.3, and the thickness of the sealant layer was 25 μm.

[0056] The laminated conductive cloth tape according to Example 10 was the same as that of Example 9, except that the thickness of the adhesive layer was 65 μm.

[0057] The laminated conductive cloth tape according to Example 11 is the same as that of Example 10, except that the adhesive layer is Oribain BPW 6570 (manufactured by Toyochem).

[0058] The laminated conductive cloth tape according to Comparative Example 1 is the same as that of Example 1 except that the thermoplastic resin layer is not provided.

[0059] The laminated conductive cloth tape according to Comparative Example 2 is the same as that of Example 1, except that the thickness of the thermoplastic resin layer is 50 μm.

[0060] The laminated conductive cloth tape according to Comparative Example 3 is the same as that of Example 1, except that the thermoplastic resin layer is made of polyvinyl chloride having a Shore A hardness of 25 and a thickness of 100 μm.

[0061] The laminated conductive fabric tape according to Comparative Example 4 is the same as that of Comparative Example 3, except that the conductive fabric is a woven fabric having a surface roughness Ra of 8.8.

[0062] The laminated conductive cloth tape according to Comparative Example 5 is the same as that of Comparative Example 3, except that the thickness of the thermoplastic resin layer is 850 μm.

[0063] The laminated conductive cloth tape of Comparative Example 6 was the same as that of Example 6, except that the Shore A hardness of the thermoplastic resin layer was 25 and the thickness was 100 μm, and the 100% tensile modulus of the sealant layer was 16.5 MPa.

[0064] The laminated conductive cloth tape according to Comparative Example 7 is the same as that of Example 1, except that the Shore A hardness of the thermoplastic resin layer is 100.

[0065] The above Examples 1 to 11 and Comparative Examples 1 to 7 were evaluated in three aspects including adhesion, tape edge peeling and tape abrasion test. Adhesion was evaluated by T-peel test.

[0066] In the T-peel test, the operator cuts a sample of the laminated conductive cloth tape with a width of 19 mm and a length of 250 mm, sets the thermoplastic resin layer on one side of the chuck of the tensile tester, and sets the conductive cloth on the other side. Thereafter, the operator peels the sample at a speed of 300 mm / min and reads the tensile load value at this time. The average value of the five tensile load values ​​thus obtained is evaluated, and a tensile load value of 2N or more is evaluated as "A", a tensile load value of 1N or more but less than 2N is evaluated as "B", and a tensile load value of less than 1N is evaluated as "C".

[0067] Regarding tape edge peeling, the laminated conductive cloth tape was wound around a mandrel with a diameter of 10 mm and then left at 80°C for one week, and the tape edge was checked for peeling. The peeling amount was evaluated as "A" when it was 1.0 mm or less, "B" when it was more than 1.0 mm and less than 2.0 mm, and "C" when it was 2.0 mm or more.

[0068] For the tape wear test, the laminated conductive cloth tape was cut into a test piece of appropriate length, and the piece was attached to an aluminum tube with a diameter of 10 mm. The tube was then placed in an abrasion resistance tester specified in JASO D 608, and a load of 4.4 N was applied. Then, the abrasion tape was moved at a speed of 1500 mm / min, and the tape length until it came into contact with the aluminum tube was read. The evaluation of a tape length of 300 mm or more was "A", the evaluation of a tape length of 100 mm or more but less than 300 mm was "B", and the evaluation of a tape length of less than 100 mm was "C".

[0069] As a result of the evaluation, the laminated conductive cloth tapes of the three-layer structure according to Examples 1 to 4, 7 and 8 were rated as "B" or "A" in all the adhesion, tape edge peeling and tape abrasion tests. Therefore, it was found that the laminated conductive cloth tape having a three-layer structure required a surface roughness Ra of 11.9 or more, a Shore A hardness of 93 or more and 98 or less for the thermoplastic resin layer, and a thickness of 100 μm or more and 800 μm or less.

[0070] Even in laminated conductive cloth tapes, the adhesive layer remains soft to exert adhesion, and has little effect on adhesion and tape wear tests and tape edge peeling.

[0071] On the other hand, since the laminated conductive cloth tape of Comparative Example 1 did not include a thermoplastic resin layer, it was rated "C" in both the tape edge peeling and tape wear tests. In addition, it was found that even when the laminated conductive cloth tape according to Comparative Example 2 had a thermoplastic resin layer of polyvinyl chloride having a Shore A hardness of 98, if the thickness was less than 100 μm, the result of the tape wear test was "C" grade.

[0072] In addition, it was found that the Shore A hardness of the thermoplastic resin layer of the laminated conductive cloth tape according to Comparative Example 3 was 25, which was insufficient and resulted in a "C" grade in the tape wear test. In addition, it was found that the surface roughness Ra of the laminated conductive cloth tape according to Comparative Example 4 was less than 11.9, and thus the adhesion rating was "C". That is, it was found that the thermoplastic resin layer adhered to the adhesive layer when the tape was unfolded. In addition, it was found that the thickness of the thermoplastic resin layer of the laminated conductive cloth tape according to Comparative Example 5 exceeded 800 μm, which resulted in the thermoplastic resin layer becoming too thick and trying to return to the original shape, and thus, the tape edge peeled off resulting in a grade of "C". It was found that the Shore A hardness of the thermoplastic resin layer of the laminated conductive cloth tape according to Comparative Example 7 exceeded 98, which resulted in the thermoplastic resin layer becoming too hard and trying to return to the original shape, and thus, the tape edge peeled off resulting in a grade of "C".

[0073] Furthermore, as a result of the evaluation, the laminated conductive cloth tapes of the four-layer structure according to Examples 5, 6, and 9 to 11 were rated as "B" or "A" in all the adhesion, tape edge peeling, and tape abrasion tests. Therefore, it was found that the laminated conductive cloth tape having a four-layer structure required a surface roughness Ra of 11.9 or more, and the thermoplastic resin layer required a Shore A hardness of 98 and a thickness of 200 μm. In addition, it was found that the sealant layer required a 100% tensile modulus of 16.4 MPa or less.

[0074] In contrast, as shown in Comparative Example 6, when the 100% tensile modulus exceeded 16.4 MPa, the sealant layer became too hard and tried to recover to the original shape, and thus, the tape edge peeled off resulting in a rating of "C".

[0075] Therefore, the laminated conductive cloth tape 20 according to the present embodiment has a three-layer structure including a conductive cloth 21, an adhesive layer 22 and a thermoplastic resin layer 23, and the conductive cloth has a surface roughness Ra of 11.9 or more. Therefore, the contact area with the thermoplastic resin layer 23 formed on the conductive cloth 21 is ensured, and the conductive cloth 20 and the thermoplastic resin layer 23 are more firmly in close contact with each other. As a result, the possibility that the thermoplastic resin layer 23 adheres to the adhesive layer 22 when the laminated conductive cloth tape 20 is unfolded, resulting in a decrease in the adhesive strength, can be reduced, thereby preventing edge peeling. In addition, 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 attempts to return to its original shape and causes edge peeling can be reduced. The thermoplastic resin layer 23 has a Shore A hardness of 50 or more and a thickness of 100 μm or more, so it can exhibit a certain degree of wear resistance and can also suppress the peeling of the plating in the use environment. In particular, there is no need to use release paper to suppress edge peeling and plating peeling, and there is no need to perform operations such as half wrapping while peeling the release paper, which helps prevent an increase in manufacturing costs. Therefore, it is possible to provide a laminated conductive cloth tape 20 that can suppress an increase in manufacturing costs, suppress edge peeling, and suppress the peeling of the plating in the use environment.

[0076] The laminated conductive cloth tape 20 according to the present embodiment has a four-layer structure including a conductive cloth 21, an adhesive layer 22, a thermoplastic resin layer 23, and a sealant layer 24. Therefore, the sealant layer 24 can reduce the possibility of edge peeling caused by the reduction in the amount of the adhesive layer 22 that contributes to adhesion due to the penetration of the adhesive layer 22 into the conductive cloth 21. In addition, the 100% tensile modulus of the sealant layer 24 is equal to or less than 16.4 MPa, thereby reducing the possibility of edge peeling caused by the laminated conductive cloth tape 20 attached to the electric wire 10 trying to return to the original shape due to the sealant layer 24 being too hard. As a result, it is possible to provide a laminated conductive cloth tape 20 that can suppress an increase in manufacturing costs, suppress edge peeling, and suppress peeling of the plating layer in the use environment.

[0077] The thermoplastic resin layer 23 has a concavoconvex structure in which a valley portion 23a recessed toward one surface side and a mountain portion 23b protruding toward the other surface side are continuous with each other. Therefore, when the laminated conductive cloth tape 20 is attached to the electric wire 10 and then wired inside a vehicle or the like, when the electric wire is bent, the concavoconvex is stretched and flattened on the outside of the bent portion, and the concavoconvex is deepened and compressed on the inside of the bent portion, making it easier for the electric wire to follow the bend.

[0078] Although the present disclosure is described above based on the embodiments, the present disclosure is not limited to the above embodiments, and may be modified without departing from the gist of the present disclosure, and known or publicly known technologies may be combined.

[0079] For example, in the above-described embodiment, the laminated conductive cloth tape 20 is attached to one electric wire 10 , but the present disclosure is not limited to the attachment to the electric wire 10 , and the laminated conductive cloth tape 20 may be attached to a plurality of electric wires 10 .

Claims

1. A laminated conductive cloth tape with a three-layer structure, comprising: Conductive fabric, which is made of metal-plated fabric; an adhesive layer formed on one surface side of the conductive cloth; as well as a thermoplastic resin layer formed on the other surface side of the conductive cloth, 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 to 98, and a thickness of 100 μm to 800 μm.

2. A laminated conductive fabric tape having a four-layer structure, comprising: Conductive fabric, which is made of metal-plated fabric; an adhesive layer formed on one surface side of the conductive cloth; a thermoplastic resin layer formed on the other surface side of the conductive cloth; as well as a sealant layer disposed between the conductive cloth and the adhesive layer to prevent the adhesive layer from penetrating into the conductive cloth, The conductive fabric has a surface roughness Ra of 11.9 or more. The thermoplastic resin layer has a Shore A hardness of 50 to 98, and a thickness of 100 μm to 800 μm, and Wherein, the sealant layer has a 100% tensile modulus of 16.4 MPa or less.

3. The laminated conductive fabric tape according to claim 1 or 2, in, The thermoplastic resin layer has a concavo-convex structure in which valley portions recessed toward one surface side and mountain portions protruding toward the other surface side are continuous.

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