Tin-copper alloy conductive wire and high-strength conductive cloth manufactured based on tin-copper alloy conductive wire

Abstract

The invention relates to the technical field of conductive wires, in particular to a tin-copper alloy conductive wire and high-strength conductive cloth manufactured based on the tin-copper alloy conductive wire, and the tin-copper alloy conductive wire comprises a tin-copper alloy wire and a core wire; the core wire is made of polyethylene fibers, and the tin-copper alloy wire is wound on the core wire by 15-30 circles per centimeter. The conductive fabric is formed by tatting warps and wefts, and the warps and the wefts adopt tin-copper alloy conductive wires. The polyethylene fiber is used as the core wire, and the tin-copper alloy wire is tightly wound, so that the tensile strength and corrosion resistance of the conductive wire can be effectively improved. The tensile property is excellent, the tensile strength is always 33%-60% higher than that of a traditional tinned copper wire, and the stable performance can be kept even in a complex working environment. The manufactured high-strength conductive fabric is diversified in organization structure, good conductivity is guaranteed, the excellent mechanical property is achieved, the high-strength conductive fabric is suitable for fencing fabric and other intelligent textile fields needing frequent bending or stretching, and the application prospect is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive wires, in particular to a tin-copper alloy conductive wire and a high-strength conductive cloth made based on the same. Background Art

[0002] Conductive fabric is a special type of fabric with excellent electrical conductivity and electromagnetic shielding properties. It can be used for electromagnetic protection of electronic devices, preventing electromagnetic interference and electrostatic damage; it is used as a key component in smart wearable devices; and it can ensure the normal operation of equipment and the safety of personnel in medical, aviation, and military fields. Furthermore, conductive fabric can be used in some special applications, such as fencing cloth.

[0003] Conductive cloth is usually woven from conductive wire. Existing technologies, such as CN201710661852.9, disclose a flexible conductive yarn and a flexible breathable fencing cloth, which uses tinned copper wire wound on a large chemical fiber core wire to weave a flexible conductive cloth. However, there are the following problems: 1. The conductive material is tinned copper wire. During the use of the conductive cloth, the tinned copper wire will be stretched, bent, and the friction between the yarns will easily cause the tinned layer to be damaged or fall off, thereby affecting the service life of the conductive material. 2. The large chemical fiber core wire uses polyester-cotton twisted yarn, which has general tensile strength, poor elongation at break, and small elastic modulus. When the cloth is subjected to strong stretching, it is easy to cause the yarn to break, causing the performance of the conductive cloth to deteriorate or even be scrapped. Summary of the Invention

[0004] The present invention aims to provide a tin-copper alloy conductive wire and high-strength conductive cloth. By optimizing the material composition, weaving structure and surface treatment process, the present invention solves the problems in the prior art of easy shedding of the tin-plated copper wire coating and insufficient core wire strength, which lead to attenuation of conductive performance and short mechanical life.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A tin-copper alloy conductive wire, comprising a tin-copper alloy wire and a core wire;

[0007] The core wire is made of polyethylene fiber, and the tin-copper alloy wire is wound around the core wire at 15-30 turns per centimeter.

[0008] As an improvement, the fineness of the polyethylene fiber is 150D-250D.

[0009] As an improvement, the diameter of the tin-copper alloy wire is 0.03-0.12 mm.

[0010] As an improvement, the tin content of the tin-copper alloy wire is 5.5-7%, the copper content is 93-94.5%, and the total content of copper and tin is greater than 99.5%.

[0011] The present invention also discloses a high-strength conductive cloth made of tin-copper alloy conductive wire. The conductive cloth is woven with warp and weft threads, and both the warp and weft threads are made of the tin-copper alloy conductive wire.

[0012] As an improvement, the warp and weft are arranged using a plain weave.

[0013] As an improvement, the warp and weft are arranged in a twill weave.

[0014] As an improvement, the warp and weft are arranged in a composite weave, combining plain weave and twill weave.

[0015] The advantages of the present invention are:

[0016] This invention uses polyethylene fiber as the core wire, tightly wound with tin-copper alloy wire, effectively improving the tensile strength and corrosion resistance of the conductive wire. It offers excellent tensile properties, with tensile strength consistently 33%-60% higher than traditional tinned copper wire, maintaining stable performance even in complex operating environments.

[0017] The high-strength conductive fabric produced by this invention has a variety of structures, including plain, twill, or composite weaves. This ensures both good conductivity and excellent mechanical properties, making it suitable for smart textile applications such as fencing cloth that require frequent bending and stretching, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a tin-copper alloy conductive wire in Example 1.

[0019] Figure 2 This is a diagram of the organizational structure of a high-strength conductive cloth in Example 1.

[0020] Figure 3 This is a diagram of the organizational structure of a high-strength conductive cloth in Example 2.

[0021] Indicated in the figure:

[0022] 1-Tin-copper alloy wire, 2-core wire, 3-warp wire, 4-weft wire. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Example 1

[0025] This embodiment discloses a tin-copper alloy conductive wire, including a tin-copper alloy wire 1 and a core wire 2 .

[0026] like Figure 1 As shown, the diameter of the tin-copper alloy wire 1 is 0.03 mm, and the core wire 2 is a 150D polyethylene fiber. The tin-copper alloy wire 1 is wound around the core wire 2 at a density of 30 turns per centimeter.

[0027] In this embodiment, the tin content of the tin-copper alloy wire 1 is 5.5-7%, the copper content is 93-94.5%, and the total content of copper and tin is greater than 99.5%.

[0028] The production method is as follows: the tin-copper alloy raw material is CW117C, and the tin-copper alloy rod is prepared by continuous casting and rolling process. It is drawn to a diameter of 0.03 mm through multiple passes, and the online annealing technology is used to control the grain size to ≥6 levels. Then, the alloy wire is spirally wound on the surface of the polyethylene fiber core wire at a density of 30 turns / cm through a high-speed stranding machine.

[0029] Traditionally, conductive wire is primarily tinned copper. Tin plating forms a dense tin layer, insulating the wire from oxygen and moisture, preventing oxidation and the formation of a poorly conductive verdigris. However, when used in fencing cloth, which frequently experiences stretching and deformation, the tinned copper wire often suffers from detachment due to stretching and bending. This degrades the protective coating and creates a high-resistance verdigris, leading to unstable signal transmission. Furthermore, the copper wire becomes brittle due to oxidation after the tin layer is damaged, increasing the risk of breakage.

[0030] This embodiment uses a tin-copper alloy as the conductive material. This alloy optimizes the overall composition, providing more uniform corrosion resistance and preventing the tin plating from peeling. Furthermore, the addition of tin significantly inhibits the formation of verdigris, improving the corrosion resistance of the conductive filament.

[0031] At the same time, this embodiment uses polyethylene fiber as the core wire 2. Compared with polyester-cotton twisted yarn, polyethylene fiber has higher tensile strength, higher initial modulus and higher elongation at break.

[0032] This embodiment also discloses a high-strength conductive cloth, which is made by weaving the above-mentioned tin-copper alloy conductive wire as the warp 3 and the weft 4. Figure 2 As shown, the conductive cloth of this embodiment is arranged in a plain weave.

[0033] Example 2

[0034] This embodiment discloses a tin-copper alloy conductive wire, including a tin-copper alloy wire 1 and a core wire 2 .

[0035] The diameter of the tin-copper alloy wire 1 is 0.12 mm, and the core wire 2 is a 250D polyethylene fiber. The tin-copper alloy wire 1 is wound around the core wire 2 at a density of 15 turns per centimeter.

[0036] In this embodiment, the tin content of the tin-copper alloy wire 1 is 5.5-7%, the copper content is 93-94.5%, and the total content of copper and tin is greater than 99.5%.

[0037] The production method is as follows: tin-copper alloy rods are prepared through continuous casting and rolling processes, drawn to a diameter of 0.12 mm through multiple passes, and the grain size is controlled to ≥ level 6 using online annealing technology. Subsequently, the alloy wire is spirally wound on the surface of the polyethylene fiber core wire at a density of 15 turns / cm through a high-speed stranding machine.

[0038] This embodiment also discloses a high-strength conductive cloth, which is made by weaving the above-mentioned tin-copper alloy conductive wire as the warp 3 and the weft 4. Figure 3 As shown, the conductive cloth of this embodiment is arranged in a twill weave.

[0039] Example 3

[0040] This embodiment discloses a tin-copper alloy conductive wire, including a tin-copper alloy wire 1 and a core wire 2 .

[0041] The diameter of the tin-copper alloy wire 1 is 0.08 mm, and the core wire 2 is 200D polyethylene fiber. The tin-copper alloy wire 1 is wound around the core wire 2 at a density of 25 turns per centimeter.

[0042] In this embodiment, the tin content of the tin-copper alloy wire 1 is 5.5-7%, the copper content is 93-94.5%, and the total content of copper and tin is greater than 99.5%.

[0043] The production method is as follows: tin-copper alloy rods are prepared through continuous casting and rolling processes, drawn to a diameter of 0.08 mm through multiple passes, and the grain size is controlled to ≥ level 6 using online annealing technology. Subsequently, the alloy wire is spirally wound on the surface of the polyethylene fiber core wire at a density of 25 turns / cm through a high-speed stranding machine.

[0044] This embodiment also discloses a high-strength conductive cloth, which is made by weaving using the above-mentioned tin-copper alloy conductive yarn as the warp 3 and the weft 4. The conductive cloth of this embodiment adopts a composite weave arrangement, combining plain weave and twill weave.

[0045] Comparative Example 1

[0046] Tinned copper wire was wrapped around a two-ply polyester-cotton twisted yarn. The diameter of the tinned copper wire was 0.1 mm, and the thickness after tinning was 0.8 μm. The winding density of the tinned copper wire was 30 turns per centimeter. The polyester-cotton twisted yarn was 21S yarn.

[0047] 1. Experimental principles and standards

[0048] According to GB / T 228.1-2010 "Tension Tests on Metallic Materials - Part 1: Room Temperature Test Methods" and ASTM D 638 "Test Standard for Tensile Properties of Plastics", the tensile strength (MPa) and elongation at break (%) of the specimens were measured using a universal testing machine, and the differences in mechanical properties of different material structures were compared and analyzed.

[0049] 2. Experimental Materials

[0050] The experimental materials are shown in the table below:

[0051] Table 1 Tensile test materials

[0052]

[0053]

[0054] 3. Experimental Equipment

[0055] Electronic universal testing machine: range 5kN, accuracy ±0.5%, fixture spacing 50mm.

[0056] Extensometer: gauge length 50mm, resolution 0.001mm.

[0057] Environmental chamber: controlled temperature 23±2℃, humidity 50±5%RH.

[0058] 4. Operation steps

[0059] 1. Sample pretreatment

[0060] All samples were conditioned for 24 h under standard conditions (23°C, 50% RH) and the 50 mm original gauge line was marked using a laser etching machine.

[0061] 2. Equipment Calibration

[0062] Calibrate the force measuring system of the testing machine according to GB / T 16825.1, install the pneumatic clamp, and set the tensile speed to 5mm / min

[0063] 3. Testing Process

[0064] Clamp both ends of the specimen (the fixture is lined with a rubber anti-slip layer) to ensure axial force; install the extensometer, load it to a preload of 0.5N, and then return it to zero; continuously stretch it at a speed of 5mm / min until it breaks, and record the maximum load and the change in gauge length at break; repeat the test 5 times / group, and take the average after eliminating outliers.

[0065] 4. Data calculation

[0066] Tensile strength calculation:

[0067]

[0068] Calculation of elongation at break:

[0069]

[0070] Among them, F max is the maximum load, A0 is the original cross-sectional area, L is the fracture gauge length, and L0 is the original gauge length.

[0071] 5. Experimental Results

[0072] Table 2 Tensile test results of various materials

[0073]

[0074]

[0075] 6. Results Analysis

[0076] The tensile strength of the examples increased by 33%-60% compared to the control examples, indicating that the tensile properties of Examples 1-3 were significantly higher than that of Control Example 1. Example 2, due to the use of thicker 0.12 mm alloy wire (a fourfold increase in cross-sectional area), had the highest tensile strength but the lowest elongation at break, consistent with the theoretical strengthening effect of thin-diameter materials.

[0077] 7. Conclusion

[0078] Through optimized composition and polyethylene fiber reinforcement, the tin-copper alloy conductive filament exhibits significantly greater tensile strength than conventional tinned copper wire structures. The composite structure design of Example 3 maintains a high strength (489 MPa) while increasing elongation at break by 79% compared to the control, achieving optimal overall performance and making it suitable for smart textile applications requiring frequent bending, such as fencing fabrics.

[0079] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tin-copper alloy conductive wire, characterized in that: including tin-copper alloy wire and core wire; The core wire is made of polyethylene fiber, and the tin-copper alloy wire is wound around the core wire at 15-30 turns per centimeter.

2. The tin-copper alloy conductive wire according to claim 1, characterized in that: The fineness of the polyethylene fiber is 150D-250D.

3. The tin-copper alloy conductive wire according to claim 1, characterized in that: The diameter of the tin-copper alloy wire is 0.03-0.12 mm.

4. The tin-copper alloy conductive wire according to claim 1, characterized in that: The tin content of the tin-copper alloy wire is 5.5-7%, the copper content is 93-94.5%, and the total content of copper and tin is greater than 99.5%.

5. A high-strength conductive cloth made from the tin-copper alloy conductive wire according to claim 1, characterized in that: The conductive cloth is woven from warp and weft threads, and both the warp and weft threads are made of the tin-copper alloy conductive yarn.

6. The high-strength conductive cloth according to claim 5, characterized in that: The warp and weft threads are arranged in a plain weave.

7. The high-strength conductive cloth according to claim 5, characterized in that: The warp and weft are arranged in a twill weave.

8. The high-strength conductive cloth according to claim 6 or 7, characterized in that: The warp and weft are arranged in a composite weave, combining plain and twill weaves.

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