Impact-resistant and tear-resistant cable and its processing technology

Abstract

The present invention discloses an impact-resistant and tear-resistant cable and its processing technology, belonging to the technical field of cables. The impact-resistant and tear-resistant cable sequentially includes a conductor, an insulating layer, a multi-stage composite reinforcing layer, an oxygen barrier layer, and an outer protective layer from the inside to the outside; the conductor is formed by stranding nickel-plated copper wires and pure nickel wires; the insulating layer is wrapped and covered by a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether; the oxygen barrier layer is formed by smearing diamond mud oxygen barrier material; the multi-stage composite reinforcing layer is prepared by compounding carbon fiber and a bio-based polymer composite material; the outer protective layer is plastically wrapped by thermoplastic dynamically vulcanized rubber; the cable of the present invention has excellent impact resistance and tear resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and particularly relates to an impact-resistant and tear-resistant cable and its processing technology. Background Art

[0002] An impact-resistant and tear-resistant cable is a cable specifically designed to withstand high impact forces and tearing forces. It is usually made of high-strength and high-toughness materials to ensure the integrity and electrical performance of the cable when subjected to external impact or tearing.

[0003] With the development of modern industry and technology, cables are increasingly widely used in the fields of power transmission, data communication, automation control, etc. However, in complex industrial environments, cables often face the risk of various mechanical damages such as impact and tearing. In order to ensure the reliability and safety of cables in these harsh environments, it is particularly important to develop cables with impact-resistant and tear-resistant properties and their processing technologies. Therefore, the present invention develops an impact-resistant and tear-resistant cable and its processing technology to solve the technical problems of poor impact resistance and easy cracking of cables in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide an impact-resistant and tear-resistant cable and its processing technology to solve the technical problems of poor impact resistance and easy cracking of cables in the prior art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The impact-resistant and tear-resistant cable sequentially includes a conductor, an insulating layer, a multi-stage composite reinforcing layer, an oxygen barrier layer, and an outer protective layer from the inside to the outside; the conductor is formed by stranding nickel-plated copper wires and pure nickel wires; the insulating layer is wrapped and covered by a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether; the oxygen barrier layer is formed by smearing diamond mud oxygen barrier material; the multi-stage composite reinforcing layer is prepared by compounding carbon fiber and bio-based polymer composite material; the outer protective layer is plastically wrapped by thermoplastic dynamically vulcanized rubber.

[0007] Furthermore, the preparation method of the bio-based polymer composite material includes the following steps:

[0008] S1. Prepare a soy protein-based polymer: Mix soy protein powder with water, add it to a stirrer, stir to obtain a soy protein solution; slowly add a glutaraldehyde solution to the soy protein solution and continue stirring to obtain a gel-like soy protein-based polymer;

[0009] S2. Preparation of modified aramid fiber: Heat-treat the aramid fiber in a nitrogen atmosphere, then soak the aramid fiber in a preheated NaOH solution to obtain a clean aramid fiber cloth. Soak the clean aramid fiber in water, treat it with an ultrasonic processor, and dry it to obtain the modified aramid fiber;

[0010] S3. Impregnation and extrusion: Soak the modified aramid fiber in a gel-like soy protein-based polymer. After sufficient impregnation, pass the impregnated fiber through an extruder to obtain a soy protein-based polymer and fiber composite;

[0011] S4. Curing: Cure the soy protein-based polymer and fiber composite at a high temperature to obtain a bio-based polymer composite material.

[0012] Further, in S1, the concentration of soy protein powder in the soy protein solution is 30 - 40 wt%, the stirring speed is 300 - 400 rpm, the stirring time is 40 - 50 min, the concentration of the glutaraldehyde solution is 2 - 5 wt%, the volume ratio of the glutaraldehyde solution to the soy protein solution is 10 - 50:100, and the glutaraldehyde addition speed is 1 - 2 mL / min; in S2, the heat-treatment temperature is 200 - 300 °C, the heat-treatment time is 1 - 2 h, the preheating temperature is 70 - 90 °C, the mass concentration of the NaOH solution is 1 - 3 wt%, the soaking time is 1 - 2 h, the frequency of the ultrasonic processor treatment is 200 - 300 Hz, and the treatment time is 30 - 60 min; in S3, the impregnation temperature is 20 - 25 °C, the time is 15 - 30 min, the speed through the extruder is 2 - 5 m / min, and the water content of the soy protein-based polymer and fiber composite is 10 - 20 wt%; in S4, the curing temperature is 80 - 120 °C, and the curing time is 1 - 3 h.

[0013] Further, a preparation method of thermoplastic dynamically vulcanized rubber includes the following steps:

[0014] (1) Pretreatment: Place the rubber component and the thermoplastic resin in an electrothermal constant-temperature forced-draft drying oven for drying to obtain a dried rubber component and thermoplastic resin;

[0015] (2) Premixing: Mix the rubber component with a cross-linking agent and a co-cross-linking agent, add them to a torque rheometer for premixing to obtain a rubber premix;

[0016] (3) Blending: Blend the rubber premix, the thermoplastic resin, and tris(2,4-di-tert-butylphenyl) phosphite in a torque rheometer to obtain a crude thermoplastic dynamically vulcanized rubber;

[0017] (4) Cooling and drying: Place the thermoplastic dynamically vulcanized rubber at room temperature for cooling and then place it in an electrothermal constant-temperature forced-draft drying oven for drying to obtain the thermoplastic dynamically vulcanized rubber.

[0018] Further, in step (1), the rubber component is a mixture of ethylene propylene diene monomer (EPDM) rubber and butyl rubber, and the mass ratio of EPDM rubber to butyl rubber is 3:1. The thermoplastic resin is a mixture of high-density polyethylene (HDPE) and flexible polyvinyl chloride (PVC), and the mass ratio of HDPE to flexible PVC is 1:1. The HDPE is a HDPE rod from Macklin, Ф30×1000mm; the flexible PVC is the particle - 2659 from Langfang Zhehang Building Materials Co., Ltd. The temperature of electrothermal constant temperature forced air drying is 60 - 65°C, and the drying time is 2 - 3h. In step (2), the crosslinking agent is a mixture of 1,4-bis(tert-butylperoxyisopropyl)benzene and dicumyl peroxide, and the mass ratio of 1,4-bis(tert-butylperoxyisopropyl)benzene to dicumyl peroxide is 3:1. The co-crosslinking agent is triallyl isocyanurate, and the mass ratio of the rubber component, crosslinking agent, and co-crosslinking agent is 80 - 100:6 - 8:0.5 - 1. The temperature of the torque rheometer is 165 - 200°C, and the rotation speed is 60 - 70 rpm. In step (3), the mass ratio of the rubber premix, thermoplastic resin, and tris(2,4-di-tert-butylphenyl) phosphite is 86.5 - 109:80 - 100:0.2 - 1. The temperature of blending is 190 - 210°C, the rotation speed is 60 - 70 rpm, and the time is 7 - 10 min. In step (4), the temperature of electrothermal constant temperature forced air drying is 60 - 80°C, and the drying time is 2 - 4h.

[0019] The processing technology of an impact-resistant and tear-resistant cable includes the following steps:

[0020] M1. Draw single wires from the conductor materials nickel-plated copper wires and pure nickel wires through the die holes of a wire drawing machine, twist multiple single wires together to form a wire core, and use an extruder to coat the wire core with tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer to obtain a conductor insulated wire.

[0021] M2. Treat carbon fiber with plasma to obtain modified carbon fiber, and then use a knitting machine to knit the modified carbon fiber and the bio-based polymer composite into a network structure to form a multi-level composite reinforcement layer; wrap the multi-level composite reinforcement layer around the conductor insulated wire to obtain a reinforced conductor insulated wire.

[0022] M3. Dissolve diamond mud oxygen isolation material in ethanol to obtain diamond mud oxygen isolation liquid, and evenly apply it on the reinforced conductor insulated wire to obtain an oxygen-isolated reinforced conductor insulated wire.

[0023] M4. Wrap the thermoplastic dynamically vulcanized rubber around the oxygen-isolated reinforced conductor insulated wire through an extruder to obtain an impact-resistant and tear-resistant cable.

[0024] Furthermore, in M1, the wire drawing temperature is 25 - 60 °C, the wire drawing speed is 1 - 5 m / s, the stranding angle is 45 - 60°, the stranding pitch is 20 - 40 mm, the extrusion temperature of the extruder is 280 - 320 °C, and the screw speed is 50 - 100 rpm; in M2, the power of the plasma treatment is 100 - 200 W, the treatment time is 10 - 30 seconds, and the braiding density is 20 - 40 strands / cm 2 , and the braiding angle is 30 - 60°; in M3, the mass - volume ratio of diamond mud oxygen - barrier material to ethanol is 1:4 - 6, and the coating thickness is 0.1 - 0.3 mm; in M4, the extrusion temperature of the extruder is 180 - 220 °C, and the screw speed is 100 - 200 rpm.

[0025] In summary, due to the adoption of the above - mentioned technical solutions, the beneficial effects of the present invention are as follows:

[0026] 1. The present invention prepares an impact - resistant and tear - resistant cable through a conductor, an insulating layer, a multi - level composite reinforcement layer, an oxygen - barrier layer, and an outer protective layer. Among them, the stranding of nickel - plated copper wire and pure nickel wire is used as the conductor, enhancing the electrical conductivity and mechanical strength of the cable; the insulating layer uses tetrafluoroethylene - perfluoroalkoxy vinyl ether copolymer, ensuring the insulation performance while also providing good weather resistance and corrosion resistance; further, through the braiding of modified carbon fiber and bio - based polymer composite material, a multi - level composite reinforcement layer is formed, significantly improving the impact resistance and tear resistance of the cable. The combination of the high strength of modified carbon fiber and the toughness of bio - based polymer composite material enables the cable to maintain good structural integrity when subjected to external force impact, significantly enhancing its tear - resistant performance; the addition of the diamond mud oxygen - barrier layer effectively isolates the erosion of oxygen to the inside of the cable, extends the service life of the cable, and also improves the fire - resistant performance of the cable; the thermoplastic dynamic vulcanized rubber as the outer protective layer not only provides good wear resistance and anti - aging performance, but also enhances its impact resistance.

[0027] 2. The present invention forms a gel through the cross - linking of soy - protein - based polymer and glutaraldehyde. Glutaraldehyde is a bifunctional cross - linking agent that can form cross - links between aldehyde groups and amino groups among soy - protein molecules, increasing the density of the polymer network structure. The modified aramid fiber is fully impregnated in the gel - like soy - protein - based polymer, enabling soy - protein molecules to attach to the fiber surface through physical adsorption and chemical bonding, forming a uniform composite structure, thereby improving its mechanical strength and heat resistance; in addition, heat - treating the aramid fiber in a nitrogen atmosphere can effectively remove impurities and weak bonds on the fiber surface, improving its surface energy and mechanical strength; finally, the soy - protein - based polymer and the modified carbon fiber composite material are made into the multi - level composite reinforcement layer of the cable, further enhancing the corrosion resistance and wear resistance of the cable.

[0028] 3. In the present invention, under the action of high-temperature shearing, the plastic phase reacts with free radicals generated by the cross-linking agent to carry free radicals, and then reactions such as cross-linking between plastic phases, co-cross-linking of plastic and rubber, and chain scission of plastic phase molecules occur, generating vulcanized rubber particles that are uniformly dispersed in the resin matrix. Further, by making full use of the high elasticity of ethylene propylene diene monomer rubber and the high airtightness of butyl rubber, the addition of high-density polyethylene can improve the flexibility and processing fluidity of the rubber, while the addition of soft polyvinyl chloride can improve the wear resistance of the rubber, thereby obtaining a thermoplastic dynamically vulcanized rubber with excellent comprehensive properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of the impact-resistant and tear-resistant cable of the present invention;

[0031] Among them, reference numerals:

[0032] 1: Conductor; 2: Insulation layer; 3: Multistage composite reinforcement layer; 4: Oxygen isolation layer; 5: Outer sheath. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] Refer to Figure 1 As shown, the present embodiment discloses an impact-resistant and tear-resistant cable, which sequentially includes a conductor 1, an insulation layer 2, a multistage composite reinforcement layer 3, an oxygen isolation layer 4, and an outer sheath 5 from the inside to the outside.

[0036] The present embodiment discloses a preparation method of a bio-based polymer composite material, including the following steps:

[0037] S1. Preparation of soy protein-based polymer: Mix 300 g of soy protein powder with 1000 mL of water, add it to a stirrer, stir at a speed of 300 rpm for 40 min to obtain a soy protein solution; Add 100 mL of 2 wt% glutaraldehyde solution to the soy protein solution at a speed of 1 mL / min, and continue stirring to obtain a gel-like soy protein-based polymer;

[0038] S2. Preparation of modified aramid fiber: Heat-treat the aramid fiber in a nitrogen atmosphere at a temperature of 200 °C for 1 h, then soak the aramid fiber in a 1 wt% NaOH solution at 70 °C for 1 - 2 h to obtain a clean aramid fiber cloth. Soak the clean aramid fiber in water and treat it with an ultrasonic processor at a frequency of 200 Hz for 30 min, then dry it to obtain the modified aramid fiber;

[0039] S3. Impregnation and extrusion: Soak the modified aramid fiber in the gel-like soy protein-based polymer, treat it with an ultrasonic processor at a frequency of 200 Hz for 30 min, and then pass the impregnated fiber through an extruder at a speed of 2 m / min to obtain a soy protein-based polymer and fiber composite with a water content of 10 wt%;

[0040] S4. Curing: Cure the soy protein-based polymer and fiber composite at a high temperature, with the curing temperature being 80 - 120 °C and the curing time being 1 - 3 h to obtain a bio-based polymer composite.

[0041] This example discloses a preparation method of a thermoplastic dynamically vulcanized rubber, including the following steps:

[0042] (1) Pretreatment: Place 600 g of ethylene propylene diene monomer rubber, 200 g of butyl rubber, 400 g of polyethylene, and 400 g of polyvinyl chloride in an electrothermal constant temperature forced air drying oven for drying at a temperature of 60 - 65 °C for 2 h to obtain dried rubber components and thermoplastic resins;

[0043] (2) Premixing: Mix 600 g of ethylene propylene diene monomer rubber, 200 g of butyl rubber, 4.5 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 1.5 g of dicumyl peroxide, and 0.5 g of triallyl isocyanurate, add them to a torque rheometer for premixing, with the temperature of the torque rheometer being 165 °C and the rotation speed being 60 rpm to obtain a rubber premix;

[0044] (3) Blending: Blend the rubber premix, 400 g of polyethylene, 400 g of polyvinyl chloride, and 0.2 g of tris(2,4-di-tert-butylphenyl) phosphite in a torque rheometer under high-temperature conditions at a blending temperature of 190 °C, a rotation speed of 60 rpm, and a time of 7 min to obtain a crude product of thermoplastic dynamically vulcanized rubber;

[0045] (4) Cooling and drying: Place the thermoplastic dynamically vulcanized rubber at room temperature for cooling and then place it in an electrothermal constant temperature forced air drying oven for drying. The drying temperature is 60 °C and the drying time is 2 h to obtain the thermoplastic dynamically vulcanized rubber.

[0046] This embodiment also discloses a processing technology for an impact-resistant and tear-resistant cable, including the following steps:

[0047] M1. Draw single wires from the conductor materials nickel-plated copper wire and pure nickel wire through the die hole of a wire drawing machine. The wire drawing temperature is 25 °C and the wire drawing speed is 1 m / s. Strands of multiple single wires are twisted together to form a wire core. The twisting angle is 45° and the twisting pitch is 20 mm. Use an extruder to coat the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer on the wire core. The extrusion temperature of the extruder is 280 °C and the screw speed is 50 rpm to obtain the conductor insulated wire.

[0048] M2. Treat the carbon fiber with plasma. The power of the plasma treatment is 100 W and the treatment time is 10 seconds to obtain the modified carbon fiber. Then use a knitting machine to knit the modified carbon fiber and the bio-based polymer composite material into a mesh structure. The knitting density is 20 strands / cm 2 , and the knitting angle is 30° to form a multi-stage composite reinforcement layer. Wrap the multi-stage composite reinforcement layer around the conductor insulated wire to obtain the reinforced conductor insulated wire.

[0049] M3. Dissolve 100 g of diamond mud oxygen isolation material in 400 mL of ethanol to obtain the diamond mud oxygen isolation liquid, and evenly apply it on the reinforced conductor insulated wire. The application thickness is 0.1 mm to obtain the oxygen isolation reinforced conductor insulated wire.

[0050] M4. Wrap the thermoplastic dynamically vulcanized rubber around the oxygen isolation reinforced conductor insulated wire through an extruder. The extrusion temperature is 180 °C and the screw speed is 100 rpm to obtain the impact-resistant and tear-resistant cable.

[0051] Example 2:

[0052] Refer to Figure 1 As shown, this embodiment discloses an impact-resistant and tear-resistant cable, which sequentially includes a conductor 1, an insulating layer 2, a multi-stage composite reinforcement layer 3, an oxygen isolation layer 4, and an outer sheath 5 from the inside to the outside.

[0053] This embodiment discloses a preparation method for a bio-based polymer composite material, including the following steps:

[0054] S1. Preparation of soy protein-based polymer: Mix 350 g of soy protein powder with 1000 mL of water, add it to a stirrer, stir at a speed of 350 rpm for 45 min to obtain a soy protein solution; Add 100 - 500 mL of 3 wt% glutaraldehyde solution to the soy protein solution at a speed of 2 mL / min, and continue stirring to obtain a gel-like soy protein-based polymer;

[0055] S2. Preparation of modified aramid fiber: Heat-treat aramid fiber in a nitrogen atmosphere at a temperature of 250 °C for 2 h, then soak the aramid fiber in a 2 wt% NaOH solution at 70 - 90 °C for 2 h to obtain a clean aramid fiber cloth. Soak the clean aramid fiber in water and treat it with an ultrasonic processor at a frequency of 250 Hz for 40 min, then dry it to obtain modified aramid fiber;

[0056] S3. Impregnation and extrusion: Soak the modified aramid fiber in the gel-like soy protein-based polymer, treat it with an ultrasonic processor at a frequency of 250 Hz for 40 min, and then pass the impregnated fiber through an extruder at a speed of 3 m / min to obtain a soy protein-based polymer and fiber composite with a water content of 15 wt%;

[0057] S4. Curing: Cure the soy protein-based polymer and fiber composite at a high temperature. The curing temperature is 100 °C and the curing time is 2 h to obtain a bio-based polymer composite.

[0058] This example discloses a preparation method of thermoplastic dynamically vulcanized rubber, which includes the following steps:

[0059] (1) Pretreatment: Place 750 g of ethylene propylene diene monomer rubber, 250 g of butyl rubber, 500 g of polyethylene, and 500 g of polyvinyl chloride in an electrothermal constant temperature forced air drying oven for drying at a temperature of 65 °C for 3 h to obtain dried rubber components and thermoplastic resin;

[0060] (2) Premixing: Mix 750 g of ethylene propylene diene monomer rubber, 250 g of butyl rubber, 6 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 2 g of dicumyl peroxide, and 1 g of triallyl isocyanurate, add them to a torque rheometer for premixing. The temperature of the torque rheometer is 190 °C and the rotation speed is 70 rpm to obtain a rubber premix;

[0061] (3) Blending: Blend the rubber premix, 500 g of polyethylene, 500 g of polyvinyl chloride, and 1 g of tris(2,4-di-tert-butylphenyl) phosphite under high temperature conditions in a torque rheometer. The blending temperature is 200 °C, the rotation speed is 70 rpm, and the time is 10 min to obtain a crude product of thermoplastic dynamically vulcanized rubber;

[0062] (4) Cooling and drying: Place the thermoplastic dynamically vulcanized rubber at room temperature for cooling and then place it in an electrothermal constant temperature forced air drying oven for drying. The drying temperature is 80 °C and the drying time is 4 h to obtain the thermoplastic dynamically vulcanized rubber.

[0063] This embodiment also discloses a processing technology for an impact-resistant and tear-resistant cable, including the following steps:

[0064] M1. Draw single wires from the conductor materials nickel-plated copper wires and pure nickel wires through the die holes of a wire drawing machine. The wire drawing temperature is 50 °C and the wire drawing speed is 4 m / s. Strands of multiple single wires are stranded together to form a wire core. The stranding angle is 50° and the stranding pitch is 30 mm. Use an extruder to coat the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer on the wire core. The extrusion temperature of the extruder is 300 °C and the screw speed is 80 rpm to obtain a conductor insulated wire.

[0065] M2. Treat carbon fiber with plasma. The power of the plasma treatment is 150 W and the treatment time is 20 seconds to obtain modified carbon fiber. Then use a knitting machine to knit the modified carbon fiber and the bio-based polymer composite material into a mesh structure. The knitting density is 30 strands / cm 2 , and the knitting angle is 40° to form a multi-level composite reinforcement layer; Wrap the multi-level composite reinforcement layer around the conductor insulated wire to obtain a reinforced conductor insulated wire.

[0066] M3. Dissolve 100 g of diamond mud oxygen isolation material in 500 mL of ethanol to obtain a diamond mud oxygen isolation liquid, and evenly apply it on the reinforced conductor insulated wire. The application thickness is 0.2 mm to obtain an oxygen isolation reinforced conductor insulated wire.

[0067] M4. Wrap the thermoplastic dynamically vulcanized rubber around the oxygen isolation reinforced conductor insulated wire through an extruder. The extrusion temperature is 200 °C and the screw speed is 150 rpm to obtain an impact-resistant and tear-resistant cable.

[0068] Example 3:

[0069] Refer to Figure 1 As shown, this embodiment discloses an impact-resistant and tear-resistant cable, which sequentially includes a conductor 1, an insulating layer 2, a multi-level composite reinforcement layer 3, an oxygen isolation layer 4, and an outer protective layer 5 from the inside to the outside.

[0070] This embodiment discloses a preparation method for a bio-based polymer composite material, including the following steps:

[0071] S1. Preparation of soy protein-based polymer: Mix 400 g of soy protein powder with 1000 mL of water, add it to a stirrer, stir at a speed of 400 rpm for 50 min to obtain a soy protein solution; Add 500 mL of 5 wt% glutaraldehyde solution to the soy protein solution at a glutaraldehyde addition rate of 2 mL / min, and continue stirring to obtain a gel-like soy protein-based polymer;

[0072] S2. Preparation of modified aramid fiber: Heat-treat the aramid fiber in a nitrogen atmosphere at a temperature of 300 °C for 2 h, then soak the aramid fiber in a 3 wt% NaOH solution at 90 °C for 2 h to obtain a clean aramid fiber cloth. Soak the clean aramid fiber in water and treat it with an ultrasonic processor at a frequency of 300 Hz for 60 min, and then dry it to obtain the modified aramid fiber;

[0073] S3. Impregnation and extrusion: Soak the modified aramid fiber in the gel-like soy protein-based polymer and treat it with an ultrasonic processor at a frequency of 300 Hz for 60 min. Pass the impregnated fiber through an extruder at a speed of 5 m / min to obtain a soy protein-based polymer and fiber composite with a water content of 20 wt%;

[0074] S4. Curing: Cure the soy protein-based polymer and fiber composite at a high temperature. The curing temperature is 120 °C and the curing time is 3 h to obtain a bio-based polymer composite material.

[0075] This example discloses a preparation method of a thermoplastic dynamically vulcanized rubber, which includes the following steps:

[0076] (1) Pretreatment: Place 750 g of ethylene propylene diene monomer rubber, 250 g of butyl rubber, 500 g of polyethylene, and 500 g of polyvinyl chloride in an electrothermal constant temperature forced air drying oven for drying. The drying temperature is 65 °C and the drying time is 3 h to obtain dried rubber components and thermoplastic resins;

[0077] (2) Premixing: Mix 750 g of ethylene propylene diene monomer rubber, 250 g of butyl rubber, 6 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 2 g of dicumyl peroxide, and 1 g of triallyl isocyanurate, add them to a torque rheometer for premixing. The temperature of the torque rheometer is 200 °C and the rotation speed is 70 rpm to obtain a rubber premix;

[0078] (3) Blending: Blend the rubber premix, 500 g of polyethylene, 500 g of polyvinyl chloride, and 1 g of tris(2,4-di-tert-butylphenyl) phosphite in a torque rheometer under high temperature conditions. The blending temperature is 210 °C, the rotation speed is 70 rpm, and the time is 10 min to obtain a crude product of thermoplastic dynamically vulcanized rubber;

[0079] (4) Cooling and drying: Place the thermoplastic dynamically vulcanized rubber at room temperature for cooling and then place it in an electrothermal constant temperature forced air drying oven for drying. The drying temperature is 80 °C and the drying time is 4 h to obtain the thermoplastic dynamically vulcanized rubber.

[0080] This embodiment also discloses a processing technology for an impact-resistant and tear-resistant cable, including the following steps:

[0081] M1. Draw single wires from the conductor materials nickel-plated copper wire and pure nickel wire through the die hole of a wire drawing machine. The wire drawing temperature is 60 °C and the wire drawing speed is 5 m / s. Strands of multiple single wires are stranded together to form a wire core. The stranding angle is 60° and the stranding pitch is 40 mm. Use an extruder to coat the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer on the wire core. The extrusion temperature of the extruder is 320 °C and the screw speed is 100 rpm to obtain a conductor insulated wire.

[0082] M2. Treat the carbon fiber with plasma. The power of the plasma treatment is 200 W and the treatment time is 10 - 30 seconds to obtain modified carbon fiber. Then use a knitting machine to knit the modified carbon fiber and the bio-based polymer composite material into a mesh structure. The knitting density is 40 strands / cm 2 , and the knitting angle is 60° to form a multi-level composite reinforcement layer; Wrap the multi-level composite reinforcement layer around the conductor insulated wire to obtain a reinforced conductor insulated wire.

[0083] M3. Dissolve 100 g of diamond mud oxygen isolation material in 600 mL of ethanol to obtain a diamond mud oxygen isolation liquid. Evenly apply it on the reinforced conductor insulated wire. The application thickness is 0.3 mm to obtain an oxygen isolation reinforced conductor insulated wire.

[0084] M4. Wrap the thermoplastic dynamically vulcanized rubber around the oxygen isolation reinforced conductor insulated wire through an extruder. The extrusion temperature is 220 °C and the screw speed is 200 rpm to obtain an impact-resistant and tear-resistant cable.

[0085] Comparative Example 1:

[0086] Compared with Example 3, in the preparation process of the impact-resistant and tear-resistant cable in Comparative Example 1, an aramid fiber woven mesh structure is used to replace the multi-level composite reinforcement layer, and other conditions remain unchanged.

[0087] Comparative Example 2:

[0088] Compared with Example 3, in the preparation process of the impact-resistant and tear-resistant cable in Comparative Example 2, a carbon fiber woven mesh structure is used to replace the multi-level composite reinforcement layer, and other conditions remain unchanged.

[0089] Comparative Example 3:

[0090] Comparative Example 3 is compared with Example 3. In the preparation process of the impact-resistant and tear-resistant cable, soy protein-based polymer is not added, and other conditions remain unchanged.

[0091] Comparative Example 4:

[0092] Comparative Example 4 is compared with Example 3. In the preparation process of the impact-resistant and tear-resistant cable, thermoplastic resin is not added, and other conditions remain unchanged.

[0093] Experimental Example

[0094] The following performance tests were carried out on the impact-resistant and tear-resistant cable samples prepared in Examples 1-3 and Comparative Examples 1-4:

[0095] I. Impact Resistance Test

[0096] The test was carried out according to GB / T2951.31-2008 "General Test Methods for Insulating and Sheathing Materials of Cables and Optical Fibre Cables". The temperature was (140±3)°C, the time was 240 min, k = 0.6, the indentation depth did not exceed 50% of the total thickness of the insulation and sheath, and an AC 6.5 kV, 5-7 min voltage test was carried out, requiring no breakdown; the test was carried out according to GB / T2951.14-2008 "General Test Methods for Insulating and Sheathing Materials of Cables and Optical Fibre Cables". The cooling temperature was -40°C, the time was 16-18 h, the mass of the falling hammer was 1000 g, the mass of the impact block was 200 g, and the falling height was 100 mm. There should be no visible cracks on the surface. The impact resistance test was carried out on the impact-resistant and tear-resistant cable samples prepared in Examples 1-3 and Comparative Examples 1-4. The results are shown in Table 1:

[0097] Table 1

[0098] Group High Temperature Pressure Low Temperature Impact Force Example 1 Not punctured in 7 min Cooled for 17 h, not cracked Example 2 Not punctured in 8 min Cooled for 18 h, not cracked Example 3 Not punctured in 8 min Cooled for 18 h, not cracked Comparative Example 1 Not punctured in 3 min Cooled for 12 h, not cracked Comparative Example 2 Not punctured in 3 min Cooled for 12 h, not cracked Comparative Example 3 Not punctured in 4 min Cooled for 13 h, not cracked Comparative Example 4 Not punctured in 4 min Cooled for 14 h, not cracked

[0099] According to the test results in Table 1, it can be seen that the cables prepared in Examples 1-3 of the present invention have excellent impact resistance. By comparing Comparative Examples 1-4 with Examples 1-3, it can be seen that adding a multi-stage composite reinforcing layer, soy protein-based polymer and thermoplastic resin can effectively improve the impact resistance of the cable.

[0100] II. Tear Resistance

[0101] The tear resistance test was carried out on the impact-resistant and tear-resistant cable samples prepared in Examples 1-3 and Comparative Examples 1-4 according to IEC60811-505:2012. The results are shown in Table 2:

[0102] Table 2

[0103]

[0104]

[0105] As can be seen from the test results in Table 2, the cables prepared in Examples 1-3 of the present invention have excellent tear resistance. By comparing Comparative Examples 1-4 with Examples 1-3, it can be seen that adding a multi-stage composite reinforcing layer, a soy protein-based polymer, and a thermoplastic resin can effectively improve the tear resistance of the cable.

[0106] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

[0107] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An impact-resistant and tear-resistant cable, characterized in that: The device comprises, from the inside to the outside, a conductor (1), an insulating layer (2), a multi-stage composite reinforcement layer (3), an oxygen-isolating layer (4) and an outer sheath (5); the conductor is formed by twisting nickel-plated copper wire and pure nickel wire; the insulating layer is formed by wrapping and covering tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer; the oxygen-isolating layer is formed by coating diamond mud oxygen-isolating material; the multi-stage composite reinforcement layer is formed by compositely preparing carbon fiber and bio-based polymer composite material; the outer sheath is formed by shaping and wrapping thermoplastic dynamic vulcanized rubber; A method for preparing a bio-based polymer composite material comprises the following steps: S1. preparing a soy protein-based polymer: mixing soy protein powder with water, adding the mixture into a blender, and stirring to obtain a soy protein liquid; slowly adding a glutaraldehyde solution into the soy protein liquid, and continuing to stir to obtain a gel-like soy protein-based polymer; S2. preparing modified aramid fiber: heat-treating the aramid fiber in a nitrogen atmosphere, and then soaking the aramid fiber in a preheated NaOH solution to obtain a clean aramid fiber cloth, soaking the clean aramid fiber in water, treating it with an ultrasonic processor, and drying it to obtain a modified aramid fiber; S3, impregnation extrusion: the modified aramid fiber is immersed in a gel-like soy protein-based polymer. After sufficient impregnation, the impregnated fiber is passed through an extruder to obtain a soy protein-based polymer and fiber composite; S4, curing: curing the soy protein-based polymer and the fiber composite at high temperature to obtain a bio-based polymer composite material; The preparation method of thermoplastic dynamically vulcanized rubber comprises the following steps: (1) Pretreatment: drying the rubber component and the thermoplastic resin in an electric constant temperature blast drying oven to obtain dried rubber component and thermoplastic resin; (2) Premixing: Mix the rubber component with the crosslinking agent and the auxiliary crosslinking agent, add them into the torque rheometer for premixing, and obtain a rubber premix; (3) Blending: blending the rubber premix, the thermoplastic resin and tri(2,4-di-tert-butylbenzene)phosphite in a torque rheometer to obtain a crude thermoplastic dynamically vulcanized rubber product; (4) Cooling and drying: The thermoplastic dynamically vulcanized rubber is cooled at room temperature and then dried in an electrically heated constant temperature forced air drying oven to obtain the thermoplastic dynamically vulcanized rubber.

2. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: The concentration of soybean protein powder in the soybean protein liquid in S1 is 30-40wt%, the stirring speed is 300-400rpm, the stirring time is 40-50min, the concentration of glutaraldehyde solution is 2-5wt%, the volume ratio of glutaraldehyde solution to soybean protein liquid is 10-50:100, and the glutaraldehyde addition rate is 1-2mL / min; the heat treatment temperature in S2 is 200-300℃, the heat treatment time is 1-2h, the preheating temperature is 70-90℃, the mass concentration of NaOH solution is 1-3wt%, the soaking time is 1-2h, the frequency of ultrasonic processor treatment is 200-300Hz, and the treatment time is 30-60min.

3. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: The immersion temperature in S3 is 20-25°C, the time is 15-30min, the speed through the extruder is 2-5m / min, and the water content of the soy protein-based polymer and fiber composite is 10-20wt%; the curing temperature in S4 is 80-120°C, and the curing time is 1-3h.

4. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: In step (1), the rubber component is a mixture of EPDM rubber and butyl rubber, the mass ratio of EPDM rubber to butyl rubber is 3:1, the thermoplastic resin is a mixture of high-density polyethylene and soft polyvinyl chloride, the mass ratio of high-density polyethylene to soft polyvinyl chloride is 1:1, the temperature of the electric constant temperature blast drying is 60-65°C, and the drying time is 2-3h.

5. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: In step (2), the crosslinking agent is a mixture of 1,4-bis(tert-butylperoxyisopropyl)benzene and diisopropylbenzene peroxide, the mass ratio of 1,4-bis(tert-butylperoxyisopropyl)benzene to diisopropylbenzene peroxide is 3:1, the auxiliary crosslinking agent is triallyl isocyanurate, the mass ratio of the rubber component, the crosslinking agent and the auxiliary crosslinking agent is 80-100:6-8:0.5-1, the temperature of the torque rheometer is 165-200°C, and the speed is The speed of the mixing process is 60-70 rpm; the mass ratio of the rubber premix, the thermoplastic resin and tri(2,4-di-tert-butylbenzene)phosphite in step (3) is 86.5-109:80-100:0.2-1, the mixing temperature is 190-210°C, the rotation speed is 60-70 rpm, and the time is 7-10 min; the temperature of the electric constant temperature blast drying in step (4) is 60-80°C, and the drying time is 2-4 h.

6. A processing technology for an impact-resistant and tear-resistant cable according to any one of claims 1 to 5, characterized in that: The steps include: M1. Drawing the conductor material nickel-plated copper wire and pure nickel wire into single wire through the die hole of a wire drawing machine, twisting a plurality of single wires together to form a wire core, and using an extruder to coat tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer on the wire core to obtain a conductor insulated wire; M2. Treating the carbon fiber with plasma to obtain modified carbon fiber, and then using a braiding machine to weave the modified carbon fiber and the bio-based polymer composite material into a mesh structure to form a multi-level composite reinforcement layer; wrapping the multi-level composite reinforcement layer on the conductor insulation wire to obtain a reinforced conductor insulation wire; M3, dissolving the diamond mud oxygen-isolating material in ethanol to obtain a diamond mud oxygen-isolating liquid, and applying the diamond mud oxygen-isolating liquid evenly on the reinforced conductor insulation wire to obtain an oxygen-isolating reinforced conductor insulation wire; M4. Wrap the thermoplastic dynamically vulcanized rubber on the oxygen-insulated reinforced conductor insulation wire through an extruder to obtain an impact-resistant and tear-resistant cable.

7. The processing technology of the impact-resistant and tear-resistant cable according to claim 6, characterized in that: In M1, the wire drawing temperature is 25-60℃, the wire drawing speed is 1-5m / s, the twisting angle is 45-60°, the twisting pitch is 20-40mm, the extrusion temperature of the extruder is 280-320℃, and the screw speed is 50-100rpm; in M2, the power of plasma treatment is 100-200W, the treatment time is 10-30 seconds, the weaving density is 20-40 strands / cm², and the weaving angle is 30-60°; in M3, the mass volume ratio of diamond mud oxygen barrier material to ethanol is 1:4-6, and the coating thickness is 0.1-0.3mm; in M4, the extrusion temperature of the extruder is 180-220℃, and the screw speed is 100-200rpm.

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