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

Abstract

The invention discloses an impact-resistant and tear-resistant cable and a processing technology thereof, and belongs to the technical field of cables. The impact-resistant and tear-resistant cable sequentially comprises a conductor, an insulating layer, a multi-stage composite enhancement layer, an oxygen barrier layer and an outer protective layer from inside to outside, the conductor is formed by twisting a nickel-plated copper wire and a pure nickel wire; the insulating layer is formed by wrapping and covering a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer; the oxygen isolation layer is formed by smearing a diamond mud oxygen isolation material; the multi-stage composite reinforcement layer is prepared by compounding carbon fibers and a bio-based polymer composite material; the outer protective layer is formed by molding and wrapping thermoplastic dynamic vulcanized rubber; the cable provided by the invention has excellent impact resistance and tear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to an impact-resistant and tear-resistant cable and a processing technology thereof. Background Art

[0002] Impact and tear resistant cable is a cable specially designed to withstand high impact and tear forces. It is usually made of high-strength and high-toughness materials to ensure that the integrity and electrical performance of the cable can be maintained when it is impacted or torn by external forces.

[0003] With the development of modern industry and technology, cables are increasingly used in the fields of power transmission, data communication, and automatic control. However, in complex industrial environments, cables are often exposed to the risk of mechanical damage such as various impacts 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 and tear resistance and their processing technology. Therefore, the present invention develops an impact-resistant and tear-resistant cable and its processing technology, which are used to solve the technical problems of poor impact resistance and easy cracking of cables in the prior art. Summary of the invention

[0004] The object of the present invention is to provide an impact-resistant and tear-resistant cable and a processing technology thereof, so as to solve the technical problems of poor impact resistance and easy cracking of the cable in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The impact-resistant and tear-resistant cable comprises, from the inside to the outside, a conductor, an insulating layer, a multi-stage composite reinforcement layer, an oxygen-isolating layer and an outer sheath; the conductor is formed by twisting nickel-plated copper wire and pure nickel wire; the insulating layer is wrapped and covered by tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer; the oxygen-isolating layer is coated with diamond mud oxygen-isolating material; the multi-stage composite reinforcement layer is composited with carbon fiber and bio-based polymer composite material; the outer sheath is formed by shaping and wrapping thermoplastic dynamic vulcanized rubber.

[0007] Furthermore, the method for preparing the bio-based polymer composite material comprises the following steps:

[0008] 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;

[0009] 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;

[0010] 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;

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

[0012] Furthermore, the concentration of soybean protein powder in the soybean protein solution 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 solution is 10-50:100, and the glutaraldehyde addition rate is 1-2mL / min; the heat treatment temperature in S2 is 200-300°C, the heat treatment time is 1-2h, the preheating temperature is 70-90°C, The mass concentration of the NaOH solution is 1-3wt%, the immersion time is 1-2h, the frequency of the ultrasonic processor treatment is 200-300Hz, and the treatment time is 30-60min; 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 soybean 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.

[0013] Furthermore, the preparation method of the thermoplastic dynamically vulcanized rubber comprises the following steps:

[0014] (1) Pretreatment: drying the rubber component and the thermoplastic resin in an electric constant temperature blast drying oven to obtain a dried rubber component and thermoplastic resin;

[0015] (2) Premixing: mixing the rubber component with the crosslinking agent and the auxiliary crosslinking agent, and adding the mixture into the torque rheometer for premixing to obtain a rubber premix;

[0016] (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;

[0017] (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.

[0018] Furthermore, 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 high-density polyethylene is a McLean high-density polyethylene rod, Ф30×1000mm; the soft polyvinyl chloride is granule-2659 produced by Langfang Zhehang Building Materials Co., Ltd.; the temperature of the electric constant temperature blast drying is 60-65°C, and the drying time is 2-3h; the cross-linking agent in step (2) is a mixture of 1,4-bis(tert-butylperoxyisopropyl)benzene and diisopropylbenzene peroxide, 1,4-bis(tert-butylperoxyisopropyl)benzene The mass ratio of (isopropyl) benzene to diisopropyl 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 rotation speed is 60-70rpm; in step (3), the mass ratio of the rubber premix, the thermoplastic resin and tris(2,4-di-tert-butylbenzene) phosphite is 86.5-109:80-100:0.2-1, the blending temperature is 190-210°C, the rotation speed is 60-70rpm, and the time is 7-10min; in step (4), the temperature of the electric constant temperature blast drying is 60-80°C, and the drying time is 2-4h.

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

[0020] 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;

[0021] 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;

[0022] 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;

[0023] 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.

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

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The present invention prepares an impact-resistant and tear-resistant cable through a conductor, an insulating layer, a multi-stage composite reinforcement layer, an oxygen-isolating layer and an outer sheath, wherein nickel-plated copper wire and pure nickel wire are twisted as conductors to enhance the electrical conductivity and mechanical strength of the cable; the insulating layer uses tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer to ensure insulation performance while also providing good weather resistance and corrosion resistance; further, a multi-stage composite reinforcement layer is formed by weaving modified carbon fiber and bio-based polymer composite materials, which significantly improves the impact resistance and tear resistance of the cable; the high strength of the modified carbon fiber and the toughness of the bio-based polymer composite material are combined, so that the cable can maintain good structural integrity when subjected to external impact, and significantly enhances its tear resistance; the addition of the diamond mud oxygen-isolating layer effectively isolates the oxygen from corroding the inside of the cable, prolongs the service life of the cable, and also improves the fire resistance of the cable; thermoplastic dynamic vulcanized rubber is used as the outer sheath, which not only provides good wear resistance and aging resistance, but also enhances its impact resistance.

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

[0028] 3. The present invention carries free radicals through the action of free radicals generated by the plastic phase and the cross-linking agent under high-temperature shearing, followed by cross-linking between plastic phases, co-cross-linking of plastic and rubber, and breaking of the molecular chain of the plastic phase, to generate vulcanized rubber particles uniformly dispersed in the resin matrix, and further by making full use of the high elasticity of EPDM rubber and the high air tightness of butyl rubber, the addition of high-density polyethylene can improve the flexibility and processing fluidity of the rubber, and the addition of soft polyvinyl chloride can improve the wear resistance of the rubber, thereby obtaining a thermoplastic dynamic vulcanized rubber with excellent comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0031] Wherein, the reference numerals are:

[0032] 1: Conductor; 2: Insulation layer; 3: Multi-level composite reinforcement layer; 4: Oxygen barrier layer; 5: Outer sheath. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1 As shown, this embodiment discloses an impact-resistant and tear-resistant cable, which includes, from the inside to the outside, a conductor 1, an insulating layer 2, a multi-level composite reinforcement layer 3, an oxygen-isolating layer 4 and an outer sheath 5.

[0036] This embodiment discloses a method for preparing a bio-based polymer composite material, comprising the following steps:

[0037] S1. preparing a soy protein-based polymer: mixing 300 g of soy protein powder with 1000 mL of water, adding the mixture into a stirrer, stirring at a speed of 300 rpm for 40 min to obtain a soy protein solution; adding 100 mL of a 2 wt % glutaraldehyde solution into the soy protein solution, adding the glutaraldehyde at a speed of 1 mL / min, and continuing stirring to obtain a gel-like soy protein-based polymer;

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

[0039] S3, impregnation extrusion: the modified aramid fiber is immersed in a gel-like soybean protein-based polymer, the frequency of the ultrasonic processor is 200 Hz, the processing time is 30 minutes, and the impregnated fiber is passed through an extruder at a speed of 2 m / min to obtain a soybean protein-based polymer and fiber composite with a water content of 10 wt%;

[0040] S4. Curing: curing the soybean protein-based polymer and the fiber composite at a high temperature, wherein the curing temperature is 80-120° C. and the curing time is 1-3 hours to obtain a bio-based polymer composite material.

[0041] This embodiment discloses a method for preparing a thermoplastic dynamically vulcanized rubber, comprising the following steps:

[0042] (1) Pretreatment: 600 g of EPDM rubber, 200 g of butyl rubber, 400 g of polyethylene and 400 g of polyvinyl chloride are placed in an electric constant temperature air drying oven and dried at a temperature of 60-65° C. for 2 h to obtain a dried rubber component and a thermoplastic resin;

[0043] (2) Premixing: 600 g of EPDM rubber, 200 g of butyl rubber, 4.5 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 1.5 g of diisopropylbenzene peroxide and 0.5 g of triallyl isocyanurate were mixed and added into a torque rheometer for premixing. The temperature of the torque rheometer was 165° C. and the rotation speed was 60 rpm to obtain a rubber premix.

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

[0045] (4) Cooling and drying: The thermoplastic dynamically vulcanized rubber is cooled to room temperature and then dried in an electrically heated constant temperature forced air drying oven at a temperature of 60° C. for a drying time of 2 h to obtain a thermoplastic dynamically vulcanized rubber.

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

[0047] 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, the wire drawing temperature is 25°C, the wire drawing speed is 1m / s, and multiple single wires are twisted together to form a wire core, the twisting angle is 45°, and the twisting pitch is 20mm. Using an extruder, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer is coated on the wire core, the extrusion temperature of the extruder is 280°C, and the screw speed is 50rpm, to obtain a conductor insulated wire;

[0048] M2. Treat the carbon fiber with plasma at a power of 100 W for 10 seconds to obtain modified carbon fiber. Then use a braiding machine to weave the modified carbon fiber and the bio-based polymer composite material into a mesh structure with a weaving density of 20 strands / cm 2 , the braiding angle is 30°, forming 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;

[0049] M3. Dissolve 100g of diamond mud oxygen-isolating material in 400mL of ethanol to obtain diamond mud oxygen-isolating liquid, and apply it evenly on the reinforced conductor insulation wire with a coating thickness of 0.1mm to obtain oxygen-isolating reinforced conductor insulation wire;

[0050] M4. Wrap the thermoplastic dynamic vulcanized rubber on the oxygen-insulated reinforced conductor insulation wire through an extruder at an extrusion temperature of 180°C and a screw speed of 100 rpm to obtain an impact-resistant and tear-resistant cable.

[0051] Embodiment 2:

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

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

[0054] S1. preparing a soy protein-based polymer: mixing 350 g of soy protein powder with 1000 mL of water, adding the mixture into a stirrer, stirring at a speed of 350 rpm for 45 min to obtain a soy protein solution; adding 100-500 mL of a 3 wt % glutaraldehyde solution into the soy protein solution, adding the glutaraldehyde at a speed of 2 mL / min, and continuing stirring to obtain a gel-like soy protein-based polymer;

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

[0056] S3, impregnation extrusion: the modified aramid fiber is immersed in a gel-like soybean protein-based polymer, the frequency of the ultrasonic processor is 250 Hz, the processing time is 40 min, and the impregnated fiber is passed through an extruder at a speed of 3 m / min to obtain a soybean protein-based polymer and fiber composite with a water content of 15 wt%;

[0057] S4. Curing: curing the soybean protein-based polymer and the fiber composite at a high temperature of 100° C. for 2 hours to obtain a bio-based polymer composite material.

[0058] This embodiment discloses a method for preparing a thermoplastic dynamically vulcanized rubber, comprising the following steps:

[0059] (1) Pretreatment: 750 g of EPDM rubber, 250 g of butyl rubber, 500 g of polyethylene and 500 g of polyvinyl chloride were placed in an electric constant temperature air drying oven and dried at a temperature of 65° C. for a drying time of 3 h to obtain a dried rubber component and a thermoplastic resin;

[0060] (2) Premixing: 750 g of EPDM rubber, 250 g of butyl rubber, 6 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 2 g of diisopropylbenzene peroxide and 1 g of triallyl isocyanurate were mixed and added into a torque rheometer for premixing. The temperature of the torque rheometer was 190° C. and the rotation speed was 70 rpm to obtain a rubber premix.

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

[0062] (4) Cooling and drying: The thermoplastic dynamically vulcanized rubber is cooled to room temperature and then dried in an electrically heated constant temperature forced air drying oven at a temperature of 80° C. for a drying time of 4 h to obtain a thermoplastic dynamically vulcanized rubber.

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

[0064] 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, the wire drawing temperature is 50°C, the wire drawing speed is 4m / s, and multiple single wires are twisted together to form a wire core, the twisting angle is 50°, and the twisting pitch is 30mm. Using an extruder, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer is coated on the wire core, the extrusion temperature of the extruder is 300°C, and the screw speed is 80rpm, to obtain a conductor insulated wire;

[0065] M2. Treat the carbon fiber with plasma at a power of 150 W for 20 seconds to obtain modified carbon fiber. Then use a braiding machine to weave the modified carbon fiber and the bio-based polymer composite material into a mesh structure with a weaving density of 30 strands / cm 2 , the braiding angle is 40°, forming 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;

[0066] M3. Dissolve 100g of diamond mud oxygen-isolating material in 500mL of ethanol to obtain diamond mud oxygen-isolating liquid, and apply it evenly on the reinforced conductor insulation wire to a thickness of 0.2mm to obtain an oxygen-isolating reinforced conductor insulation wire;

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

[0068] Embodiment 3:

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

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

[0071] S1. preparing a soy protein-based polymer: mixing 400 g of soy protein powder with 1000 mL of water, adding the mixture into a stirrer, stirring at a speed of 400 rpm for 50 min to obtain a soy protein solution; adding 500 mL of a 5 wt % glutaraldehyde solution into the soy protein solution, adding glutaraldehyde at a speed of 2 mL / min, and continuing stirring to obtain a gel-like soy protein-based polymer;

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

[0073] S3, impregnation extrusion: the modified aramid fiber is immersed in a gel-like soybean protein-based polymer, the frequency of the ultrasonic processor is 300 Hz, the processing time is 60 min, and the impregnated fiber is passed through an extruder at a speed of 5 m / min to obtain a soybean protein-based polymer and fiber composite with a water content of 20 wt%;

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

[0075] This embodiment discloses a method for preparing a thermoplastic dynamically vulcanized rubber, comprising the following steps:

[0076] (1) Pretreatment: 750 g of EPDM rubber, 250 g of butyl rubber, 500 g of polyethylene and 500 g of polyvinyl chloride were placed in an electric constant temperature air drying oven and dried at a temperature of 65° C. for a drying time of 3 h to obtain a dried rubber component and a thermoplastic resin;

[0077] (2) Premixing: 750 g of EPDM rubber, 250 g of butyl rubber, 6 g of 1,4-bis(tert-butylperoxyisopropyl)benzene, 2 g of diisopropylbenzene peroxide and 1 g of triallyl isocyanurate were mixed and added to a torque rheometer for premixing. The temperature of the torque rheometer was 200° C. and the rotation speed was 70 rpm to obtain a rubber premix.

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

[0079] (4) Cooling and drying: The thermoplastic dynamically vulcanized rubber is cooled to room temperature and then dried in an electrically heated constant temperature forced air drying oven at a temperature of 80° C. for a drying time of 4 h to obtain a thermoplastic dynamically vulcanized rubber.

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

[0081] 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, the wire drawing temperature is 60°C, the wire drawing speed is 5m / s, and multiple single wires are twisted together to form a wire core, the twisting angle is 60°, and the twisting pitch is 40mm. Using an extruder, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer is coated on the wire core, the extrusion temperature of the extruder is 320°C, and the screw speed is 100rpm, to obtain a conductor insulated wire;

[0082] M2. Treat the carbon fiber with plasma at a power of 200 W for 10-30 seconds to obtain modified carbon fiber. Then use a braiding machine to weave the modified carbon fiber and the bio-based polymer composite material into a mesh structure with a weaving density of 40 strands / cm 2 , the braiding angle is 60°, forming 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;

[0083] M3. Dissolve 100g of diamond mud oxygen-isolating material in 600mL of ethanol to obtain diamond mud oxygen-isolating liquid, and apply it evenly on the reinforced conductor insulation wire to a thickness of 0.3mm to obtain an oxygen-isolating reinforced conductor insulation wire;

[0084] M4. Wrap the thermoplastic dynamic vulcanized rubber on the oxygen-insulated reinforced conductor insulation wire through an extruder at an extrusion temperature of 220°C and a screw speed of 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, a mesh structure woven with aramid fibers is used to replace the multi-stage composite reinforcement layer, and other conditions remain unchanged.

[0087] Comparative Example 2:

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

[0089] Comparative Example 3:

[0090] Comparative Example 3 Compared with Example 3, in the preparation process of the impact-resistant and tear-resistant cable in Comparative Example 3, no soybean protein-based polymer is added, and other conditions remain unchanged.

[0091] Comparative Example 4:

[0092] Compared with Example 3, in Comparative Example 4, during the preparation of the impact-resistant and tear-resistant cable, no thermoplastic resin is added, and other conditions remain unchanged.

[0093] Experimental example

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

[0095] 1. Impact resistance test

[0096] According to GB / T2951.31-2008 "General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers", the test was carried out at a temperature of (140±3)°C, a time of 240 min, k=0.6, the indentation depth did not exceed 50% of the total thickness of the insulation and sheath, and an AC6.5kV, 5-7min voltage test was carried out, requiring no breakdown; according to GB / T2951.14-2008 "General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers", the test was carried out at a cooling temperature of -40°C, a time of 16-18h, a falling hammer mass of 1000g, a collision block mass of 200g, a falling height of 100mm, and no visible cracks on the surface. The impact resistance of the impact-resistant and tear-resistant cable samples prepared in Examples 1-3 and Comparative Examples 1-4 was tested, and the results are shown in Table 1:

[0097] Table 1

[0098] Group High temperature pressure Low temperature impact Example 1 7min No penetration Cooled for 17 hours, no cracking Example 2 8min without penetration Cooled for 18 hours, no cracking Example 3 8min without penetration Cooled for 18 hours, no cracking Comparative Example 1 3min no penetration Cooled for 12 hours, no cracking Comparative Example 2 3min no penetration Cooled for 12 hours, no cracking Comparative Example 3 4min no penetration Cooled for 13 hours, no cracking Comparative Example 4 4min no penetration Cooled for 14 hours, no cracking

[0099] According to the test results in Table 1, 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 reinforcement layer, a soybean protein-based polymer and a thermoplastic resin can effectively improve the impact resistance of the cable.

[0100] 2. Tear resistance

[0101] According to IEC60811-505:2012, the tear resistance performance of the impact-resistant and tear-resistant cable samples prepared in Examples 1-3 and Comparative Examples 1-4 was tested, and the results are shown in Table 2:

[0102] Table 2

[0103]

[0104]

[0105] According to 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 reinforcement layer, a soybean protein-based polymer and a thermoplastic resin can effectively improve the tear resistance of the cable.

[0106] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

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

Claims

1. Impact-resistant and tear-resistant cable, characterized in that: The invention 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 composite preparation of carbon fiber and bio-based polymer composite material; and the outer sheath is formed by shaping and wrapping thermoplastic dynamically vulcanized rubber.

2. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: 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 soybean protein-based polymer and fiber composite at high temperature to obtain a bio-based polymer composite material.

3. The impact-resistant and tear-resistant cable according to claim 2, 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 adding speed 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.

4. The impact-resistant and tear-resistant cable according to claim 2, 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.

5. The impact-resistant and tear-resistant cable according to claim 1, characterized in that: 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 a dried rubber component and thermoplastic resin; (2) Premixing: mixing the rubber component with the crosslinking agent and the auxiliary crosslinking agent, and adding the mixture into the torque rheometer for premixing to 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 placed in an electrically heated constant temperature forced air drying oven to dry, thereby obtaining the thermoplastic dynamically vulcanized rubber.

6. The impact-resistant and tear-resistant cable according to claim 5, 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.

7. The impact-resistant and tear-resistant cable according to claim 5, 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 tris(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 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.

8. A process for producing an impact-resistant and tear-resistant cable, 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.

9. The processing technology of the impact-resistant and tear-resistant cable according to claim 8, characterized in that: In M1, the wire drawing temperature is 25-60°C, the wire drawing speed is 1-5m / s, the stranding angle is 45-60°, the stranding pitch is 20-40mm, the extrusion temperature of the extruder is 280-320°C, and the screw speed is 50-100rpm; in M2, the plasma treatment power is 100-200W, the treatment time is 10-30 seconds, and the braiding density is 20-40 strands / cm 2 The weaving angle is 30-60°; the mass volume ratio of diamond mud oxygen barrier material to ethanol in M3 is 1:4-6, and the coating thickness is 0.1-0.3mm; the extrusion temperature of the extruder in M4 is 180-220℃, and the screw speed is 100-200rpm.

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