A cold-resistant insulation-grade soft polyvinyl chloride cable material and a preparation method thereof

Abstract

This application relates to the field of cable manufacturing technology, specifically disclosing a cold-resistant insulating grade soft polyvinyl chloride (PVC) cable material and its preparation method. The cold-resistant insulating grade soft PVC cable material comprises the following raw materials in parts by weight: 100-110 parts polyvinyl chloride (PVC), 30-40 parts modified nitrile rubber (NBR), 50-70 parts plasticizer, 5-10 parts stabilizer, 5-10 parts flame retardant, and 1-3 parts lubricant; the modified NBR is obtained by grafting NBR with polymethyl methacrylate. The cable material provided by this application has excellent insulation and cold-resistant properties.

Description

Technical Field

[0001] This application relates to the field of cable manufacturing technology, and more specifically, to a cold-resistant insulating grade soft polyvinyl chloride cable material and its preparation method. Background Technology

[0002] Polyvinyl chloride (PVC) resin possesses flame-retardant, oil-resistant, corona-resistant, and good mechanical and processing properties, making it widely used in the manufacture of insulation and sheathing materials for wires and cables. Currently, the cold resistance temperature of ordinary PVC cable materials is between -15℃ and -20℃. However, in cold regions where winter temperatures often drop below -40℃, wires and cables need to have good cold resistance and flexibility, and should not break under prolonged operation. The cold resistance performance of cables in low-temperature environments depends on the cold resistance of the insulation and sheathing cable materials used. Ordinary PVC cable materials are prone to embrittlement and cracking during use, and their low-temperature performance does not meet the requirements.

[0003] In existing technologies, the low-temperature brittleness of PVC is usually improved by adding a large amount of cold-resistant agent. However, excessive addition of cold-resistant agent will lead to a decrease in the insulation resistance of the material, a deterioration in thermal aging performance, and easy migration of cold-resistant agent, which will affect the product life. Summary of the Invention

[0004] To address the problems in the prior art, this application provides a cold-resistant insulating grade soft polyvinyl chloride cable material and its preparation method.

[0005] Firstly, this application provides a cold-resistant insulating grade soft polyvinyl chloride cable material, which adopts the following technical solution: A cold-resistant insulating grade soft polyvinyl chloride cable material, comprising the following raw materials in parts by weight: The mixture comprises 100-110 parts of polyvinyl chloride, 30-40 parts of modified nitrile rubber, 50-70 parts of plasticizer, 5-10 parts of stabilizer, 5-10 parts of flame retardant, and 1-3 parts of lubricant; wherein the modified nitrile rubber is obtained by grafting nitrile rubber with polymethyl methacrylate.

[0006] By adopting the above technical solution, polyvinyl chloride (PVC) serves as the matrix resin, providing the basic skeleton and inherent electrical insulation properties of the cable material. However, PVC itself is prone to brittleness at low temperatures. Modified nitrile rubber (NBR) is composed of polymethyl methacrylate (PMMA) side chains chemically grafted onto the NBR main chain. When blended with PVC, the PMMA side chains and PVC molecular chains have improved compatibility due to their similar polarity, while the NBR main chain is uniformly dispersed as an elastomer phase. This grafting structure improves the interfacial bonding between the rubber and plastic phases, allowing stress to be smoothly transferred and dissipated, thus fundamentally solving the problem of PVC embrittlement at low temperatures. Furthermore, the plasticizer molecules insert into the PVC molecular chains, weakening the interchain forces, and also enter the modified NBR. The polymethyl methacrylate side chain region gives the entire system sufficient flexibility at room temperature, while at low temperatures, the modified nitrile rubber retains its rubber elasticity. The role of the stabilizer is not only to protect PVC from dehydrochlorination degradation during processing and use, but more importantly, it needs to form a protective complex with the unsaturated double bonds remaining in the modified nitrile rubber molecular chain to prevent the rubber phase from cross-linking, hardening, or degradation under long-term thermo-oxidative conditions. The addition of flame retardant is to inhibit the flame spread of PVC during combustion. At the same time, since nitrile rubber itself has a certain degree of flammability, the flame retardant needs to act on both the PVC phase and the rubber phase simultaneously, ensuring the overall flame retardancy of the cable material through the synergistic mechanism of condensed phase and gas phase flame retardancy.

[0007] Optionally, the preparation method of the modified nitrile rubber includes the following steps: Nitrile rubber is added to toluene and heated to 50-60°C. After stirring, a rubber solution is formed. Azobisisobutyronitrile (AIBN) is added to the rubber solution and stirred. Methyl methacrylate is then added dropwise. The temperature is raised to 65-75°C and the reaction is maintained for 5-6 hours. Hydroquinone is added and the temperature is lowered to 23-27°C to obtain a reaction solution. The reaction solution is poured into ethanol, stirred, and allowed to stand for 1-2 hours. The solution is then filtered, washed, dried, and pulverized to obtain modified nitrile rubber.

[0008] By employing the above technical solution, nitrile rubber and methyl methacrylate are combined through the initiation of azobisisobutyronitrile (AIBN) to form a graft copolymer with nitrile rubber as the main chain and polymethyl methacrylate (PMMA) as the side chain. Azobisisobutyronitrile, acting as an oil-soluble thermal initiator, decomposes under heating conditions to generate free radicals. These free radicals attack the active hydrogen atoms on the nitrile rubber molecular chain, generating active grafting sites on the rubber main chain through a chain transfer reaction. Subsequently, these active sites undergo addition polymerization with PMMA monomers, chemically bonding the PMMA side chains to the nitrile rubber molecules, thereby obtaining modified nitrile rubber. The PMMA side chains have a strong affinity for polyvinyl chloride (PVC). It exhibits excellent compatibility, while the nitrile rubber backbone is uniformly dispersed in PVC as an elastomer phase, significantly improving the interfacial bonding force between the two. When this modified nitrile rubber is added to PVC cable material, the elasticity of the nitrile rubber endows PVC with excellent low-temperature toughness and impact resistance, allowing it to remain soft and non-brittle in cold environments. On the other hand, the presence of polymethyl methacrylate side chains ensures that the rubber phase can be stably anchored in the PVC matrix, unlike traditional small molecule plasticizers which migrate and precipitate over time. This ensures that the rubber phase maintains good flexibility and electrical insulation properties throughout long-term use, thereby significantly improving the cold resistance of PVC.

[0009] Optionally, the mass ratio of the nitrile rubber, toluene, azobisisobutyronitrile, methyl methacrylate and hydroquinone is 100-110:200-220:1.5-3:35-40:0.5-1.0.

[0010] Optionally, the modified nitrile rubber has a particle size ≤200nm.

[0011] By adopting the above technical solution, the particle size of modified nitrile rubber can be controlled below 200nm, which enables it to achieve more uniform nanoscale dispersion in polyvinyl chloride matrix, effectively reducing particle agglomeration and interface defects. This not only significantly improves the low-temperature impact toughness of the material and reduces the number of low-temperature embrittlement fractures, but also optimizes the internal structure of the system, increases the volume resistivity to enhance insulation performance, and improves processing fluidity, making the mechanical properties and appearance quality of the product more stable.

[0012] Optionally, the plasticizer is dioctyl terephthalate.

[0013] By adopting the above technical solution, the core function of the plasticizer is to weaken the interaction force between polyvinyl chloride molecular chains, thereby giving the material flexibility, reducing the melt viscosity of polyvinyl chloride, making the molten polyvinyl chloride system more fluid, avoiding problems such as sticking to rollers, unstable extrusion, and rough surface of products during processing, and adapting it to the industrial extrusion molding process of cable materials.

[0014] Optionally, the stabilizer is a calcium-zinc composite stabilizer.

[0015] By adopting the above technical solution, the calcium-zinc stabilizer can capture the HCl generated during degradation, prevent the degradation reaction from continuing, avoid problems such as scorching, discoloration, and embrittlement during processing, and ensure smooth extrusion molding.

[0016] Optionally, the lubricant is one or both of polyethylene wax and butyl stearate.

[0017] By adopting the above technical solution, the lubricant has good lubrication performance. During the material processing, it can reduce the friction between plastic particles and molds to a certain extent, reduce energy consumption, reduce mold wear, and improve production efficiency.

[0018] Optionally, the flame retardant is one or both of antimony trioxide and aluminum hydroxide.

[0019] By adopting the above technical solutions, flame retardants can quickly take effect when PVC is heated or burned. By absorbing heat and cooling down, isolating oxygen, blocking the combustion chain reaction, and forming a dense carbonized protective layer, they can effectively inhibit the ignition and flame spread of the material, reduce the combustion rate and heat release intensity, and reduce molten dripping and the generation of harmful fumes. This significantly improves the flame retardant safety performance of cable materials and meets the fire protection requirements for wires and cables.

[0020] Secondly, this application provides a method for preparing cold-resistant insulating grade soft polyvinyl chloride cable material, using the following technical solution: A method for preparing a cold-resistant insulating grade soft polyvinyl chloride cable material includes the following steps: Polyvinyl chloride, modified nitrile rubber, plasticizer, stabilizer, flame retardant, and lubricant are mixed evenly and then extruded and granulated to obtain cold-resistant insulating soft polyvinyl chloride cable material.

[0021] In summary, this application has the following beneficial effects: 1. In this application, modified nitrile rubber is preferably prepared by grafting polymethyl methacrylate (PMMA) onto nitrile rubber. The solubility index of the rubber particles is very similar to that of polyvinyl chloride (PVC). In addition, PMMA and PVC have extremely high compatibility. Therefore, the modified nitrile rubber can be uniformly dispersed in PVC. Nitrile rubber has excellent toughness and a low glass transition temperature. Blending it with PVC can reduce the glass transition temperature of the blend system, thereby reducing the embrittlement temperature of PVC and increasing its toughness.

[0022] 2. In this application, polyvinyl chloride is preferably used as the base material. The added modified nitrile rubber has a low glass transition temperature, and the molecular chains can still maintain good mobility at low temperatures. This can effectively make up for the defects of polyvinyl chloride molecular chains being rigid and easily becoming brittle at low temperatures, providing low-temperature elasticity to the polyvinyl chloride system, absorbing external impact energy, and preventing material cracking.

[0023] 3. This application preferably utilizes a synergistic combination of modified nitrile rubber, plasticizer, stabilizer, flame retardant, and lubricant. Among them, the modified nitrile rubber significantly improves the low-temperature toughness of polyvinyl chloride, reduces the embrittlement temperature of the material, and reduces the number of low-temperature impact fractures. At the same time, due to its uniform dispersion and controllable particle size, it effectively improves the volume resistivity of the system and enhances the insulation stability. The plasticizer improves the flexibility and processing flow of the material, the stabilizer inhibits the thermo-oxidative degradation of polyvinyl chloride, the flame retardant improves fire safety performance, and the lubricant optimizes the processing and plasticizing effect. Thus, the resulting cable material has excellent cold resistance, high insulation, good processability, and flame retardant safety, which can meet the long-term stable use requirements of wires and cables in cold environments and has a wider range of applications. Detailed Implementation

[0024] The following embodiments provide a further detailed description of this application.

[0025] Preparation example of nitrile rubber Raw material sources: Nitrile rubber is selected from Shanghai Fuyou International Trade Co., Ltd., model number 3305; Methyl methacrylate is selected from Shandong Ruigang Chemical Co., Ltd., model number industrial grade.

[0026] Preparation Example 1-1: 110g of nitrile rubber was added to a four-necked round-bottom flask containing 220g of toluene. The temperature was raised to 60℃ and stirred at 500rpm for 2h to form a rubber solution. 3g of azobisisobutyronitrile was added to the rubber solution and stirred at 500rpm for 40min. Then, 40g of methyl methacrylate was added dropwise at a rate of 2mL / min. The temperature was raised to 75℃ and the reaction was maintained for 6h. 1g of hydroquinone was added and stirred for 15min. The temperature was lowered to 27℃ to obtain a reaction solution. The reaction solution was poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 2h. The solution was filtered, washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0027] Preparation Example 1-2: 105g of nitrile rubber was added to a four-necked round-bottom flask containing 210g of toluene. The temperature was raised to 55℃ and stirred at 500rpm for 1.5h to form a rubber solution. 2g of azobisisobutyronitrile was added to the rubber solution and stirred at 500rpm for 35min. Then, 38g of methyl methacrylate was added dropwise at a rate of 1.5mL / min. The temperature was raised to 70℃ and the reaction was maintained for 5.5h. 0.8g of hydroquinone was added and stirred for 12min. The temperature was lowered to 25℃ to obtain a reaction solution. The reaction solution was poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 1.5h. The solution was filtered, washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0028] Preparation Examples 1-3: 100g of nitrile rubber was added to a four-necked round-bottom flask containing 200g of toluene. The temperature was raised to 50℃ and stirred at 500rpm for 1h to form a rubber solution. 1.5g of azobisisobutyronitrile was added to the rubber solution and stirred at 500rpm for 30min. Then, 35g of methyl methacrylate was added dropwise at a rate of 1mL / min. The temperature was raised to 65℃ and the reaction was maintained for 5h. 0.5g of hydroquinone was added and stirred for 10min. The temperature was lowered to 23℃ to obtain a reaction solution. The reaction solution was poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 1h. The solution was filtered, washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0029] Preparation Example 1-4: The difference from Preparation Example 1-1 is that azobisisobutyronitrile (AIBN) was not added. 110g of nitrile rubber was added to a four-necked round-bottom flask containing 220g of toluene, heated to 60℃, and stirred at 500rpm for 2h to form a rubber solution. 40g of methyl methacrylate was added dropwise to the rubber solution at a rate of 2mL / min, the temperature was raised to 75℃, and the reaction was maintained for 6h. 1g of hydroquinone was added, stirred for 15min, and cooled to 27℃ to obtain a reaction solution. The reaction solution was poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 2h. After filtration, the solution was washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0030] Preparation Example 1-5: The difference from Preparation Example 1-1 is that styrene is used in place of methyl methacrylate in equal amounts. 110g of nitrile rubber is added to a four-necked round-bottom flask containing 220g of toluene, heated to 60℃, and stirred at 500rpm for 2h to form a rubber solution. 3g of azobisisobutyronitrile is added to the rubber solution, and stirred at 500rpm for 40min. Then, 40g of styrene is added dropwise at a rate of 2mL / min, heated to 75℃, and kept at this temperature for 6h. 1g of hydroquinone is added, stirred for 15min, and cooled to 27℃ to obtain a reaction solution. The reaction solution is poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 2h. After filtration, it is washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0031] Preparation Examples 1-6: 110g of nitrile rubber was added to a four-necked round-bottom flask containing 220g of toluene. The temperature was raised to 60℃ and stirred at 500rpm for 2h to form a rubber solution. 3g of azobisisobutyronitrile was added to the rubber solution and stirred at 500rpm for 40min. Then, 40g of methyl methacrylate was added dropwise at a rate of 2mL / min. The temperature was raised to 55℃ and the reaction was maintained for 6h. 1g of hydroquinone was added and stirred for 15min. The temperature was lowered to 27℃ to obtain a reaction solution. The reaction solution was poured into 500g of anhydrous ethanol, stirred, and allowed to stand for 2h. The solution was filtered, washed three times with deionized water, dried at 60℃ for 12h, and pulverized to 200nm to obtain modified nitrile rubber.

[0032] Example

[0033] Example 1: A cold-resistant insulating grade soft polyvinyl chloride cable material, the raw material composition of which is shown in Table 1. In Table 1, the plasticizer is dioctyl terephthalate, selected from Shandong Huihua Chemical Group Co., Ltd., product number ZSJ; the stabilizer is calcium-zinc composite stabilizer, selected from Kunshan Sanwenlin Chemical Raw Materials Co., Ltd., model number MC91660KA; the lubricant is polyethylene wax, selected from Dongguan Shanyi Plastics Co., Ltd., model number AC 6A; and the flame retardant is antimony trioxide, selected from Henan Weiying Chemical Products Co., Ltd., model number 56-84.

[0034] The preparation method of this cold-resistant insulating grade soft polyvinyl chloride cable material includes the following steps: Polyvinyl chloride, modified nitrile rubber, plasticizer, stabilizer, flame retardant and lubricant are mixed evenly, the temperature is controlled at 130℃ and stirred for 40 minutes to obtain the mixture. The mixture is melt-extruded using a twin-screw extruder, with the first stage at 220°C, the second stage at 250°C, the third stage at 260°C, and the die head at 250°C. After cooling to room temperature, it is granulated to obtain cold-resistant insulating soft polyvinyl chloride cable material.

[0035] Table 1. Raw material ratios of cold-resistant insulating grade soft PVC cable materials in Examples 1-4 Raw materials (Kg) Example 1 Example 2 Example 3 Example 4 Polyvinyl chloride 110 108 105 100 Modified nitrile rubber 40 38 35 30 plasticizer 70 60 55 50 stabilizer 10 8 6 5 Flame retardant 10 8 6 5 lubricant 3 2.5 2 1 Example 2: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the modified nitrile rubber is prepared by Example 1-2, and the raw material dosage is shown in Table 1.

[0036] Example 3: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the modified nitrile rubber is prepared by Examples 1-3, and the raw material dosage is shown in Table 1.

[0037] Example 4: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the amount of raw materials used is different, as shown in Table 1.

[0038] Example 5: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the modified nitrile rubber is prepared from Preparation Examples 1-4.

[0039] Example 6: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the modified nitrile rubber is prepared by Examples 1-6.

[0040] Comparative Example Comparative Example 1: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that it does not contain modified nitrile rubber.

[0041] Comparative Example 2: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the nitrile rubber is not modified.

[0042] Comparative Example 3: A cold-resistant insulating soft polyvinyl chloride cable material, which differs from Example 1 in that the modified nitrile rubber is prepared from Preparation Examples 1-5.

[0043] Performance testing Cold-resistant insulating soft polyvinyl chloride cable material was prepared according to the methods in the examples and comparative examples. The mechanical properties were tested according to the following methods, and the test data were recorded in Table 2.

[0044] 1. Volume resistivity The volume resistivity of cable material was tested according to GB / 1410-2006. 2. Low-temperature impact embrittlement Low-temperature impact embrittlement of cable materials was tested according to GB / T5470-2008. Table 2. Test data of cold-resistant insulating soft PVC cable materials prepared in the examples and comparative examples. Testing items Volume resistivity (unit: Ωm, test temperature: 20℃) Low-temperature impact embrittlement -30℃ Example 1 <![CDATA[8.85×10 12 ]]> Two broken Example 2 <![CDATA[8.62×10 12 ]]> 5 broken Example 3 <![CDATA[8.45×10 12 ]]> 6 broken Example 4 <![CDATA[8.12×10 12 ]]> 8 broken Example 5 <![CDATA[7.69×10 12 ]]> 12 broken Example 6 <![CDATA[6.36×10 12 ]]> 16 broken Comparative Example 1 <![CDATA[8.34×10 10 ]]> 28 broken Comparative Example 2 <![CDATA[9.67×10 10 ]]> 25 broken Comparative Example 3 <![CDATA[7.53×10 11 ]]> 20 broken As can be seen from Examples 1-4 and Table 2, the cold-resistant insulating soft polyvinyl chloride cable material prepared in this application has excellent insulation and cold resistance properties.

[0045] Combining Examples 1 and 5 with Table 2, it can be seen that, compared with Example 1, the insulation performance and cold resistance of the cold-resistant insulating grade soft polyvinyl chloride cable material prepared in Example 5 are reduced. This indicates that the initiator can generate free radicals when heated, which can form graft active sites with the active hydrogen on the nitrile rubber main chain, thereby initiating the polymerization of methyl methacrylate monomers to form stable graft copolymers, thus improving the cold resistance of the cable material.

[0046] Combining Examples 1 and 6 with Table 2, it can be seen that, compared with Example 1, the insulation and cold resistance of the cold-resistant insulating grade soft PVC cable material prepared in Example 6 are reduced. This indicates that when the polymerization temperature is too low, the decomposition rate of azobisisobutyronitrile is insufficient, the free radical concentration is low, the reaction conversion rate is low, and the grafting effect is poor.

[0047] Based on Example 1 and Comparative Examples 1-2 and Table 2, it can be seen that, compared with Example 1, the insulation performance and cold resistance of the cold-resistant insulating grade soft PVC cable material prepared in Comparative Examples 1-2 are reduced. This indicates that the blending of modified nitrile rubber and PVC can lower the glass transition temperature of the blend system, thereby lowering the embrittlement temperature of PVC and increasing its toughness.

[0048] Based on Example 1 and Comparative Example 3, and in conjunction with Table 2, it can be seen that, compared to Example 1, the insulation and cold resistance of the cold-resistant insulating grade soft PVC cable material prepared in Comparative Example 3 are reduced. This indicates that the methyl methacrylate side chain has a specific effect on the compatibility of PVC, thereby enabling the modified nitrile rubber to be uniformly dispersed in the PVC matrix, thus improving the cold resistance of PVC.

[0049] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A cold-resistant insulating grade soft polyvinyl chloride cable material, characterized in that, Including the following parts by weight of raw materials: The mixture comprises 100-110 parts of polyvinyl chloride, 30-40 parts of modified nitrile rubber, 50-70 parts of plasticizer, 5-10 parts of stabilizer, 5-10 parts of flame retardant, and 1-3 parts of lubricant; wherein the modified nitrile rubber is obtained by grafting nitrile rubber with polymethyl methacrylate.

2. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 1, characterized in that, The preparation method of the modified nitrile rubber includes the following steps: Nitrile rubber is added to toluene and heated to 50-60°C. After stirring, a rubber solution is formed. Azobisisobutyronitrile (AIBN) is added to the rubber solution and stirred. Methyl methacrylate is then added dropwise. The temperature is raised to 65-75°C and the reaction is maintained for 5-6 hours. Hydroquinone is added and the temperature is lowered to 23-27°C to obtain a reaction solution. The reaction solution is poured into ethanol, stirred, and allowed to stand for 1-2 hours. The solution is then filtered, washed, dried, and pulverized to obtain modified nitrile rubber.

3. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 2, characterized in that, The mass ratio of the nitrile rubber, toluene, azobisisobutyronitrile, methyl methacrylate and hydroquinone is 100-110:200-220:1.5-3:35-40:0.5-1.

0.

4. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 2, characterized in that, The modified nitrile rubber has a particle size ≤200nm.

5. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 1, characterized in that, The plasticizer is dioctyl terephthalate.

6. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 1, characterized in that, The stabilizer is a calcium-zinc composite stabilizer.

7. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 1, characterized in that, The lubricant is one or both of polyethylene wax and butyl stearate.

8. The cold-resistant insulating grade soft polyvinyl chloride cable material according to claim 1, characterized in that, The flame retardant is one or both of antimony trioxide and aluminum hydroxide.

9. The method for preparing the cold-resistant insulating grade soft polyvinyl chloride cable material according to any one of claims 1-8, characterized in that, Includes the following steps: Polyvinyl chloride, modified nitrile rubber, plasticizer, stabilizer, flame retardant, and lubricant are mixed evenly and then extruded and granulated to obtain cold-resistant insulating soft polyvinyl chloride cable material.