Transparent conductive cable, composite cable and preparation method thereof

Abstract

The invention belongs to the technical field of photoelectric composite cables, and particularly discloses a transparent conductive cable, a composite cable and a preparation method thereof. Comprising a plurality of copper wires, and gaps are arranged among the copper wires; and the transparent resin is used for filling gaps among the copper wires. The photoelectric composite cable adopting the transparent conductive cable and the preparation method of the photoelectric composite cable solve the technical problems that a transparent conductive metal grid in an existing photoelectric composite cable is complex in manufacturing process, high in cost, poor in conductivity and poor in reliability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of photoelectric composite cables, and specifically discloses a transparent conductive cable, a composite cable and a preparation method thereof. BACKGROUND

[0002] The photoelectric integrated composite cable is a new type of broadband access network, which integrates optical fibers and conductive wires and is used as a transmission line in a broadband access network system. The design of the cable solves the problems of broadband access, device power supply and signal transmission, and is an innovative cable technology. The photoelectric integrated composite cable can not only transmit high-speed data signals, but also transmit power signals at the same time. This unique design makes it have obvious advantages in many application scenarios. The photoelectric integrated composite cable is suitable for various scenarios such as insulated communication optical cable, traffic communication optical cable engineering, square optical cable engineering, overhead optical cable construction, power optical cable engineering and high-altitude optical cable construction. The conductive wire part is responsible for transmitting power signals, can realize long-distance device power supply, and can reduce the cost of comprehensive wiring: the one-wire multi-use feature of the photoelectric composite cable effectively reduces the construction and grid construction cost. The photoelectric composite cable in the prior art uses copper wires as conductive wires, which is not convenient to use in scenarios such as home, hotel, medical treatment and education that require aesthetics. A feasible method is to use a transparent conductive metal mesh to replace traditional copper wires, but the existing transparent conductive metal mesh can ensure transparency but is difficult to obtain metal-level conductivity close to copper wires, and the conductivity is poor.

[0003] There is also an invention patent CN118571563A that proposes a solution, which is to make a copper mesh on a transparent base film through sputtering process, but this way of making the copper mesh has complex process, high cost, and it is difficult to guarantee the conductivity and reliability. SUMMARY

[0004] The purpose of the present application is to provide a transparent conductive cable, a photoelectric composite cable using the transparent conductive cable and a preparation method thereof, to solve the technical problems of complex process, high cost, poor conductivity and poor reliability of the transparent conductive metal mesh in the existing photoelectric composite cable.

[0005] The present application discloses a transparent conductive cable, comprising: copper wires, the copper wires are a plurality of, gaps are provided between the copper wires; and transparent resin, the transparent resin is used to fill the gaps between the copper wires.

[0006] Further, the diameter of the copper wire is 0.005mm-0.5mm, preferably 0.05mm-0.2mm.

[0007] Further, the opening rate of the transparent conductive cable is 50%, and the effective conductive cross-sectional area is 0.25mm².

[0008] The application discloses a preparation method of the transparent conductive cable, comprising: S1. rolling copper wires into flat sections with a width-height ratio of ≤1:1 to obtain flat copper wires; S2. immersing the flat copper wires into a blackening solution for surface treatment; S3. weaving the treated flat copper wires into a flat strip shape; S4. filling the surfaces of adjacent copper wires and the gaps between the adjacent copper wires with transparent resin and curing the transparent resin to form.

[0009] Further, the surface reflectivity of the copper wires after the surface treatment in S2 is lower than 10%.

[0010] Further, the flat copper wires in S3 are arranged in parallel, and the distance between adjacent copper wires is equal to the width of a single copper wire.

[0011] The application further discloses an optical-electric composite cable, comprising: at least one optical fiber transmission unit; at least one transparent conductive cable as described above; and a transparent sheath, which covers the optical fiber transmission unit and the transparent conductive cable into an integrated structure, wherein the distance between the transparent conductive cable and the optical fiber transmission unit is 0.5-2 mm.

[0012] The application further discloses a preparation method of the optical-electric composite cable, comprising: M1. positioning the optical fiber transmission unit and the transparent conductive cable in a parallel arrangement; M2. synchronously extruding a sheath layer of transparent polyurethane material through a co-extrusion die head; M3. performing hot air curing at a temperature of 50-80°C to form a composite structure with a light transmittance of ≥85%.

[0013] Compared with the prior art, the application has at least the following technical effects: 1. In the application, the transparent conductive cable is composed of micron-level copper wires (0.005-0.5 mm) after blackening treatment and transparent resin, and has a light transmittance of ≥85% and a conductive performance comparable to that of a solid copper cable; 2. The parallel weaving structure of the flat copper wires significantly improves the current carrying capacity, and a 0.25 mm² effective conductive cross-sectional area can carry a current of 5 A; 3. The optical-electric composite cable of the application is integrally formed by a co-extrusion transparent sheath, and maintains signal zero interference in an environment of -40°C to 85°C; 4. The preparation process of the application replaces vacuum sputtering with rolling and blackening, and the production cost is reduced by 50% and the product yield reaches 98%. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 : Schematic diagram of transparent conductive cable structure of the present application; Figure 2 : Figure 1 Schematic diagram of AB cross section; Figure: 1. Copper wire; 2. Transparent resin. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0016] As Figure 1 , 2 A transparent conductive cable, comprising: copper wires 1, the copper wires 1 are several, gaps are provided between the copper wires 1, the diameter of the copper wires 1 is 0.005mm-0.5mm, preferably 0.05mm-0.2mm; and transparent resin 2, the transparent resin 2 is used to fill the gaps between the copper wires 1. The opening rate of the transparent conductive cable is 50%, and the effective conductive cross-sectional area is 0.25mm².

[0017] The preparation method of the aforementioned transparent conductive cable, comprising: S1. Preparation: select copper wires 1, the diameter of the copper wires 1 is 0.005mm-0.5mm, comprehensively consider the resolution of the human eye and the conduction requirement of the product, and preferably 0.05mm-0.2mm. Take the copper wire 1 with a diameter of 0.1mm as an example, the copper wire 1 is extruded by a rolling mill roller to roll the cross section of the copper wire 1 from a circular shape into a flat shape with a width-height ratio less than or equal to 1:1. For example, the copper wire 1 with a diameter of 0.1mm is pressed into a flat shape with a width of 0.06mm and a height of about 0.13mm, and the width-height ratio is close to 1:2; S2. Immersing the flat copper wire into blackening liquid for surface treatment to reduce the reflectivity of the copper wire surface, and at the same time, the bright red copper color of the copper wire surface becomes inconspicuous colors such as black, gray and blue-black. For example, the acid blackening liquid is used to treat the copper surface into gray-brown with a reflectivity of less than 10%; S3. Weaving the treated flat copper wire into a flat strip shape by using a weaving machine, for example, 32 parallel copper wires are arranged, the width of the copper wire is 0.06mm, and the distance between two adjacent copper wires is 0.06mm; S4. Fill the surface of the adjacent copper wires and the gap between the adjacent copper wires with transparent resin glue, and then according to the curing mode of the transparent resin glue, select the ultraviolet irradiation or drying mode to cure the transparent resin glue, so as to fix the relative position of the copper wires. Considering the laying application of the photoelectric integrated composite cable, the transparent resin with certain toughness and elasticity is preferred.

[0018] Through the above steps, a transparent conductive cable with a width of about 4 mm, a thickness of about 0.2 mm, an opening rate of about 50%, and an effective conductive cross section of 0.25 mm² can be obtained.

[0019] An optical and electrical composite cable, comprising: at least one optical fiber transmission unit; at least one transparent conductive cable as described above; and a transparent sheath, the transparent sheath covering the optical fiber transmission unit and the conductive cable into an integrated structure, wherein the distance between the conductive cable and the optical fiber transmission unit is 0.5-2 mm.

[0020] A method for preparing an optical and electrical composite cable, comprising: M1. Positioning the optical fiber transmission unit and the transparent conductive cable in parallel arrangement; M2. Forming a sheath layer by synchronously extruding transparent polyurethane material through a co-extrusion die head; M3. Hot air curing at a temperature of 50-80°C to form a composite structure with a light transmittance of ≥85%.

[0021] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A transparent conductive cable, characterized in that, include: Copper wires, wherein there are several copper wires with gaps between them; and, A transparent resin is used to fill the gaps between the copper wires.

2. The transparent conductive cable according to claim 1, characterized in that, The diameter of the copper wire is 0.005mm-0.5mm, preferably 0.05mm-0.2mm.

3. The transparent conductive cable according to claim 1, characterized in that, The transparent conductive cable has an opening ratio of 50% and an effective conductive cross-sectional area of ​​0.25 mm².

4. A method for preparing a transparent conductive cable as described in any one of claims 1-3, characterized in that, include: S1. Roll the copper wire into a flat cross-section with a width-to-height ratio ≤ 1:1 to obtain a flat copper wire; S2. Immerse the flat copper wire in a blackening solution for surface treatment; S3. Braid the treated flat copper wire into a flat strip shape; S4. Fill the surfaces of adjacent copper wires and the gaps between adjacent copper wires with transparent resin, and then cure and shape it.

5. The method for preparing the transparent conductive cable according to claim 4, characterized in that, The surface reflectivity of the copper wire after S2 surface treatment is less than 10%.

6. The method for preparing the transparent conductive cable according to claim 4, characterized in that, The flat copper wires in S3 are arranged in parallel, and the distance between adjacent copper wires is equal to the width of a single copper wire.

7. A fiber optic composite cable, characterized in that, Include: At least one optical fiber transmission unit; At least one transparent conductive cable as described in claims 1-3; and, A transparent sheath covers the optical fiber transmission unit and the transparent conductive cable into an integrated structure, wherein the distance between the transparent conductive cable and the optical fiber transmission unit is 0.5-2mm.

8. A method for preparing an optoelectronic composite cable as described in claim 7, characterized in that, include: M1. Position the fiber optic transmission unit and the transparent conductive cable in a parallel arrangement; M2. A sheath layer is formed by simultaneously extruding transparent polyurethane material through a co-extrusion die; M3. Hot air curing is carried out at a temperature of 50-80℃ to form a composite structure with a light transmittance of ≥85%.

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