A charging pile EV cable material and a preparation method thereof

Abstract

This invention relates to an EV cable material for charging piles. It comprises the following components and parts by weight: 45-55 parts polyvinyl chloride (PVC), 5-10 parts stabilizer, 35-50 parts plasticizer, 25-50 parts P83 rubber, 2-5 parts flame retardant, 10-20 parts propylene diene monomer (PPD) rubber, 10-25 parts TPU, 0.1-0.4 parts lubricant, 0.2-0.8 parts antioxidant, and 1-2 parts anti-aging agent. The EV cable material of this invention is soft to the touch, has good oil resistance, high tear strength, is lightweight, and has good flame retardancy. It does not require radiation cross-linking and can meet the long-term operating requirements of cables at 125°C, achieving a truly environmentally friendly flame-retardant material. Compared with thermosetting low-smoke halogen-free materials and other materials, it is a cost-effective alternative.

Description

Technical Field

[0001] This invention relates to a cable material, and more particularly to an EV cable material for charging piles and its preparation method. Background Technology

[0002] Currently, there are more than a dozen types of materials used in the production of new energy vehicles, but none of them can fully meet the material requirements of high-energy vehicles. One type is polyolefin material cross-linked by electron accelerator irradiation, and another is TPE material composed of styrene-butadiene rubber, special oil-resistant agents, high-temperature white oil, and various polyolefins and high-efficiency flame retardants. The irradiation cross-linking method is the main method of preparation, but the investment in irradiation equipment is large, the irradiation process generates a large amount of wastewater, causing significant environmental pollution, and the wastewater treatment cost is too high. The harm to the operator's body from X-rays during irradiation is also immeasurable. Thermoplastic TPE materials require a two-step process to produce, which is relatively complex and time-consuming, and the product has a short shelf life. The two-step TPE material requires separating the styrene-butadiene rubber, filling it with oil, and letting it stand for more than twelve hours before blending and granulating it with other auxiliary materials. The resulting insulation material has poor thermal stability, low mechanical strength, and is prone to high-temperature pressure cracking, or there is a possibility of surface precipitation. The precipitation of a large number of small molecules reduces the mechanical properties of the material, consumes a lot of energy, and has extremely unstable performance, bringing great instability to product quality. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an EV cable material for charging piles and its preparation method.

[0004] Therefore, the technical solution adopted by this invention is: An EV cable material for charging piles comprises the following components and weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 35-50; P83 rubber 25-50; Flame retardant 2-5; EPDM rubber 10-20; TPU 10-25; Lubricant 0.1-0.4; Antioxidant 0.2-0.8; Anti-aging agent 1-2.

[0005] As a further improvement to the above technical solution, the following components and their weight percentages are included: Polyvinyl chloride 50; Stabilizer 8; Plasticizer 40; P83 rubber 35; Flame retardant 2; EPDM rubber 15; TPU 16; Lubricant 0.2; Antioxidant 0.5; Anti-aging agent 1.5.

[0006] As a further improvement to the above technical solution, the polyvinyl chloride is a high degree of polymerization polyvinyl chloride resin powder.

[0007] As a further improvement to the above technical solution, the stabilizer is bentonite.

[0008] As a further improvement to the above technical solution, the flame retardant is antimony trioxide.

[0009] As a further improvement to the above technical solution, the lubricant is oxidized polyethylene wax.

[0010] A method for preparing EV cable material for charging piles includes the following steps: First, add polyvinyl chloride, stabilizer, plasticizer, flame retardant, lubricant, antioxidant, and anti-aging agent into a high-speed mixer and stir at high speed for 20-30 minutes. The second step is to mix P83 rubber, EPDM rubber, and TPU at high speed for 20-30 minutes or until the material temperature reaches 140-150 degrees Celsius. Then, the mixture is fed into an internal mixer for plasticizing. When the mixture is formed into a rubber, it is added to the extrusion feeder. The third step involves air-cooling and hot-cutting of EV cable material after passing through a twin-screw granulator.

[0011] As a further improvement to the above technical solution, the temperature control of each zone in the twin-screw granulator is as follows: 175℃~195℃ in the feeding zone, 185℃~195℃ in the plasticizing zone, and 180℃~195℃ in the die head.

[0012] The advantages of this invention are: The EV cable material of this invention is soft to the touch, has good oil resistance, high tear strength, low specific gravity, and good flame retardancy. It meets the long-term operating requirements of cables at 125°C without the need for radiation cross-linking, achieving a truly environmentally friendly flame-retardant material. Compared to thermosetting low-smoke halogen-free materials and other materials, it is a cost-effective alternative. Its wear resistance and oil resistance are better than other materials. Waste materials can be recycled and reused, indirectly reducing production costs. Excellent surface finish can be obtained using ordinary PVC screw extrusion, resulting in a very smooth and flexible extruded wire. Detailed Implementation

[0013] The embodiments described in this invention are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0014] An EV cable material for charging piles comprises the following components and weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 35-50; P83 rubber 25-50; Flame retardant 2-5; EPDM rubber 10-20; TPU 10-25; Lubricant 0.1-0.4; Antioxidant 0.2-0.8; Anti-aging agent 1-2.

[0015] As a further improvement to the above technical solution, the following components and their weight percentages are included: Polyvinyl chloride 50; Stabilizer 8; Plasticizer 40; P83 rubber 35; Flame retardant 2; EPDM rubber 15; TPU 16; Lubricant 0.2; Antioxidant 0.5; Anti-aging agent 1.5.

[0016] As a further improvement to the above technical solution, the polyvinyl chloride is a high degree of polymerization polyvinyl chloride resin powder.

[0017] As a further improvement to the above technical solution, the stabilizer is bentonite.

[0018] As a further improvement to the above technical solution, the flame retardant is antimony trioxide.

[0019] As a further improvement to the above technical solution, the lubricant is oxidized polyethylene wax.

[0020] A method for preparing EV cable material for charging piles includes the following steps: First, add polyvinyl chloride, stabilizer, plasticizer, flame retardant, lubricant, antioxidant, and anti-aging agent into a high-speed mixer and stir at high speed for 20-30 minutes. The second step is to mix P83 rubber, EPDM rubber, and TPU at high speed for 20-30 minutes or until the material temperature reaches 140-150 degrees Celsius. Then, the mixture is fed into an internal mixer for plasticizing. When the mixture is formed into a rubber, it is added to the extrusion feeder. The third step involves air-cooling and hot-cutting of EV cable material after passing through a twin-screw granulator.

[0021] As a further improvement to the above technical solution, the temperature control of each zone in the twin-screw granulator is as follows: 175℃~195℃ in the feeding zone, 185℃~195℃ in the plasticizing zone, and 180℃~195℃ in the die head.

[0022] It achieves the long-term operating requirements of cables at 125℃ without the need for radiation cross-linking, making it a truly environmentally friendly flame-retardant material. Compared to thermosetting low-smoke halogen-free materials and other materials, it is a cost-effective alternative. Its wear resistance and oil resistance are superior to other materials. Waste materials can be recycled and reused, indirectly reducing production costs. Excellent surface finish can be obtained using ordinary PVC screw extrusion, resulting in a very smooth and flexible extruded wire.

[0023] The performance testing structure is as follows:

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An EV cable material for charging piles, characterized in that, It includes the following components and their weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 35-50; P83 rubber 25-50; Flame retardant 2-5; EPDM rubber 10-20; TPU 10-25; Lubricant 0.1-0.4; Antioxidant 0.2-0.8; Anti-aging agent 1-2.

2. The EV cable material for charging piles according to claim 1, characterized in that, Includes the following components and parts by weight: 50 parts polyvinyl chloride; Stabilizer 8; Plasticizer 40; P83 rubber 35; Flame retardant 2; EPDM rubber 15; TPU 16; Lubricant 0.2; Antioxidant 0.5; Anti-aging agent 1.

5.

3. The EV cable material for charging piles according to claim 1, characterized in that, The polyvinyl chloride is a high degree of polymerization polyvinyl chloride resin powder.

4. The EV cable material for charging piles according to claim 1, characterized in that, The stabilizer is bentonite.

5. The EV cable material for charging piles according to claim 1, characterized in that, The flame retardant is antimony trioxide.

6. The EV cable material for charging piles according to claim 1, characterized in that, The lubricant is oxidized polyethylene wax.

7. A method for preparing the EV cable material for charging piles as described in claim 1, characterized in that, Includes the following steps: First, add polyvinyl chloride, stabilizer, plasticizer, flame retardant, lubricant, antioxidant, and anti-aging agent into a high-speed mixer and stir at high speed for 20-30 minutes. The second step is to mix P83 rubber, EPDM rubber, and TPU at high speed for 20-30 minutes or until the material temperature reaches 140-150 degrees Celsius. Then, the mixture is fed into an internal mixer for plasticizing. When the mixture is formed into a rubber, it is added to the extrusion feeder. The third step involves air-cooling and hot-cutting of EV cable material after passing through a twin-screw granulator.

8. The method for preparing EV cable material for charging piles according to claim 6, characterized in that, The temperature control of each zone in the twin-screw granulator is as follows: feeding zone 175℃~195℃, plasticizing zone 185℃~195℃, and die head temperature 180℃~195℃.

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