Polyvinyl chloride cable with excellent mechanical property and preparation method

Abstract

The invention discloses a polyvinyl chloride cable with excellent mechanical properties and a preparation method, and relates to the technical field of cables, the polyvinyl chloride cable comprises a cable core and a cable sheath material; the cable core is a copper core; the cable sheath material is prepared from the following components in parts by weight: PVC resin, polyethylene wax, silicon carbide, calcium carbonate, composite inorganic fibers, an antioxidant, a calcium-zinc stabilizer, stearic acid, dioctyl sebacate and borate. The prepared polyvinyl chloride cable has excellent mechanical properties, can be applied to various electric power fields, and is relatively long in service life. According to the cable sheath material disclosed by the invention, the polyvinyl chloride resin is used as a base material, so that the cable sheath material has excellent insulating property and processability, and the strength and toughness of the cable sheath material can be further improved through the cooperative synergistic effect of all the components.

Description

Technical Field

[0001] This invention belongs to the field of cable technology, specifically a polyvinyl chloride cable with excellent mechanical properties and its preparation method. Background Technology

[0002] Polyvinyl chloride (PVC) cables, as an important branch of the wire and cable industry, play an indispensable role in various sectors of the national economy due to their unique physical, chemical, electrical, and flame-retardant properties. With their wide range of applications and stable performance, PVC cables have become a crucial component of the electrical industry, particularly in interior decoration, building and residential construction, industrial applications, and infrastructure development, where their importance is paramount.

[0003] As industrial development continues, people's environmental awareness is also constantly increasing. Therefore, the use of environmentally friendly PVC cable materials to replace traditional cable materials is also constantly expanding.

[0004] Polyvinyl chloride (PVC) cables come in a wide variety of types and have a wide range of applications. They are used not only for power supply and lighting systems inside buildings, but also for connecting motors, control equipment, instruments, sensors and other electrical equipment in factories and manufacturing facilities.

[0005] The quality of PVC cables is a key concern for both the industry and users. To improve the quality and performance of cables and broaden their application areas, further improvements are needed.

[0006] Based on this, a polyvinyl chloride cable with excellent mechanical properties and its preparation method are provided to solve the existing technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a polyvinyl chloride cable with excellent mechanical properties and a method for its preparation, so as to overcome the shortcomings of the prior art.

[0008] The technical solution adopted in this invention is as follows: A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: 78-82 parts PVC resin, 1-1.5 parts polyethylene wax, 2-3 parts silicon carbide, 20-25 parts calcium carbonate, 10-14 parts composite inorganic fiber, 1.6-1.8 parts antioxidant, 1-2 parts calcium zinc stabilizer, 2-3 parts stearic acid, 2-4 parts dioctyl sebate, and 1-1.5 parts borate.

[0009] As a further technical solution: the method for preparing the composite inorganic fiber is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature was 80℃ and the drying time was 50 minutes. (2) Add organic solvent to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed is 500 r / min; (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to an organic solvent, stir and mix evenly to obtain a modified solution; The stirring speed is 250 r / min; (4) The modified liquid was added to the mixture by dripping, the temperature was adjusted to 85°C, and the mixture was stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers.

[0010] As a further technical solution: the inorganic fiber in step (1) is basalt fiber; The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0011] As a further technical solution: the organic solvent in step (2) is diethylene glycol dimethyl ether; The ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber is 200mL:3-5g:20-22g.

[0012] As a further technical solution: in step (3), the mixing ratio of vinyltrimethoxysilane with azobisisobutyronitrile and organic solvent is 6-8g: 1-2g: 150mL; The organic solvent is diethylene glycol dimethyl ether.

[0013] As a further technical solution: in step (4), the mass ratio of the modified liquid to the mixed system is 1:1-1.5; The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0014] As a further technical solution: the weight ratio of the polyethylene wax to the borate is 1:1.

[0015] As a further technical solution: the borate is zinc borate.

[0016] As a further technical solution: the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0017] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0018] Beneficial effects: The polyvinyl chloride cable prepared by this invention has excellent mechanical properties, can be applied in a variety of power fields, and has a long service life.

[0019] The cable sheath material of the present invention uses polyvinyl chloride resin as the matrix material, which has excellent insulation and processing properties. Through the synergistic effect of the components, the strength and toughness of the cable sheath material can be further improved.

[0020] This invention introduces composite inorganic fibers, which can effectively withstand external loads, thereby improving the overall strength of the cable sheath material. Furthermore, the composite inorganic fibers can be uniformly dispersed in the cable sheath material system to form a three-dimensional network structure, which can effectively prevent the generation and propagation of cracks, thereby improving the toughness and impact resistance of the cable sheath material.

[0021] Because polyvinyl chloride resin is prone to thermal decomposition and oxidative degradation at high temperatures, this can lead to a decrease in the performance of cable sheath materials. The introduction of composite inorganic fibers can improve the heat resistance and flame retardancy of cable sheath materials, as well as their thermal stability, thereby delaying the thermal decomposition process of polyvinyl chloride resin in the cable sheath materials and improving their aging resistance.

[0022] This invention significantly improves the gloss and processing performance of polyvinyl chloride cable sheath material by introducing a specific ratio of polyethylene wax and zinc borate. During processing, it improves the fluidity of the sheath material, making the processing smoother and increasing production efficiency. In addition, the combined effect of polyethylene wax and zinc borate also provides certain wear resistance and aging resistance, thereby increasing the service life of the cable sheath material. Attached Figure Description

[0023] Figure 1 This is a bar chart showing the tensile strength of each specimen in the test. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: 78-82 parts PVC resin, 1-1.5 parts polyethylene wax, 2-3 parts silicon carbide, 20-25 parts calcium carbonate, 10-14 parts composite inorganic fiber, 1.6-1.8 parts antioxidant, 1-2 parts calcium zinc stabilizer, 2-3 parts stearic acid, 2-4 parts dioctyl sebate, and 1-1.5 parts borate.

[0026] The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature was 80℃ and the drying time was 50 minutes. (2) Add organic solvent to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed is 500 r / min; (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to an organic solvent, stir and mix evenly to obtain a modified solution; The stirring speed is 250 r / min; (4) The modified liquid was added to the mixture by dripping, the temperature was adjusted to 85°C, and the mixture was stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers.

[0027] In step (1), the inorganic fiber is basalt fiber; The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0028] The organic solvent in step (2) is diethylene glycol dimethyl ether; The ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber is 200mL:3-5g:20-22g.

[0029] In step (3), the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent is 6-8g: 1-2g: 150mL; The organic solvent is diethylene glycol dimethyl ether.

[0030] In step (4), the mass ratio of the modified liquid to the mixed system is 1:1-1.5; The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0031] The polyethylene wax and borate are mixed in a weight ratio of 1:1.

[0032] The borate is zinc borate.

[0033] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0034] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0035] The following are specific examples: Example 1 A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature is 80℃ and the drying time is 50 min; the inorganic fiber is basalt fiber. The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0036] (2) Add diethylene glycol dimethyl ether to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed was 500 r / min; the ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber was 200 mL: 3 g: 20 g.

[0037] (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to diethylene glycol dimethyl ether, stir and mix evenly to obtain the modified solution; The stirring speed was 250 r / min; the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent was 6 g: 1.5 g: 150 mL. (4) The modified liquid was added dropwise to the mixture, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers. The mass ratio of the modified liquid to the mixture was 1:1.2. The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0038] The weight ratio of polyethylene wax to borate is 1:1.

[0039] The borate is zinc borate.

[0040] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0041] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0042] Example 2 A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature is 80℃ and the drying time is 50 min; the inorganic fiber is basalt fiber. The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0043] (2) Add diethylene glycol dimethyl ether to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed was 500 r / min; the ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber was 200 mL: 3 g: 20 g.

[0044] (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to diethylene glycol dimethyl ether, stir and mix evenly to obtain the modified solution; The stirring speed was 250 r / min; the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent was 6 g: 1.5 g: 150 mL. (4) The modified liquid was added dropwise to the mixture, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers. The mass ratio of the modified liquid to the mixture was 1:1.2. The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0045] The weight ratio of polyethylene wax to borate is 1:1.

[0046] The borate is zinc borate.

[0047] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0048] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0049] Example 3 A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature is 80℃ and the drying time is 50 min; the inorganic fiber is basalt fiber. The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0050] (2) Add diethylene glycol dimethyl ether to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed was 500 r / min; the ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber was 200 mL: 3 g: 20 g.

[0051] (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to diethylene glycol dimethyl ether, stir and mix evenly to obtain the modified solution; The stirring speed was 250 r / min; the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent was 6 g: 1.5 g: 150 mL. (4) The modified liquid was added dropwise to the mixture, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers. The mass ratio of the modified liquid to the mixture was 1:1.2. The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0052] The weight ratio of polyethylene wax to borate is 1:1.

[0053] The borate is zinc borate.

[0054] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0055] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0056] Example 4 A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature is 80℃ and the drying time is 50 min; the inorganic fiber is basalt fiber. The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0057] (2) Add diethylene glycol dimethyl ether to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed was 500 r / min; the ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber was 200 mL: 3 g: 20 g.

[0058] (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to diethylene glycol dimethyl ether, stir and mix evenly to obtain the modified solution; The stirring speed was 250 r / min; the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent was 6 g: 1.5 g: 150 mL. (4) The modified liquid was added dropwise to the mixture, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers. The mass ratio of the modified liquid to the mixture was 1:1.2. The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0059] The weight ratio of polyethylene wax to borate is 1:1.

[0060] The borate is zinc borate.

[0061] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0062] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0063] Example 5 A polyvinyl chloride cable with excellent mechanical properties, comprising a cable core and a cable sheath material; The cable core is a copper core; The cable sheath material is made of the following components by weight: The preparation method of composite inorganic fibers is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature is 80℃ and the drying time is 50 min; the inorganic fiber is basalt fiber. The basalt fiber and acetone are mixed in a mass ratio of 1:5.

[0064] (2) Add diethylene glycol dimethyl ether to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed was 500 r / min; the ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber was 200 mL: 3 g: 20 g.

[0065] (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to diethylene glycol dimethyl ether, stir and mix evenly to obtain the modified solution; The stirring speed was 250 r / min; the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent was 6 g: 1.5 g: 150 mL. (4) The modified liquid was added dropwise to the mixture, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers. The mass ratio of the modified liquid to the mixture was 1:1.2. The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

[0066] The weight ratio of polyethylene wax to borate is 1:1.

[0067] The borate is zinc borate.

[0068] The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

[0069] A method for preparing a polyvinyl chloride cable with excellent mechanical properties includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

[0070] Comparative Example 1: The difference from Example 1 is that no composite inorganic fiber is added, while the rest of the technical solutions remain the same.

[0071] Comparative Example 2 The difference from Example 1 is that the composite inorganic fiber is replaced with untreated basalt fiber, while the rest of the technical solution remains unchanged.

[0072] Comparative Example 3 The difference from Example 1 is that the basalt fiber in the composite inorganic fiber is replaced with glass fiber, while the rest of the technical solution remains unchanged.

[0073] test: Mechanical property testing: Tensile properties were tested according to GB / T 11793—2008, using dumbbell-shaped specimens with dimensions of 100mm×70mm×1mm, and a testing speed of 30mm / min; The cable sheath materials in the examples and comparative examples were tested: Table 1 As can be seen from Table 1, the polyvinyl chloride cable sheath prepared by the present invention has excellent tensile properties.

[0074] Using Example 1 as the base sample, the effects of different modified liquids and mixing mass ratios on tensile properties were compared: Table 2 As can be seen from Table 2, the effects of different mass ratios of modified liquid and mixed systems on the tensile properties of PVC sheathing material are different.

[0075] Impact performance tests were conducted on the polyvinyl chloride sheath materials of the examples and comparative examples: Impact performance was tested according to GB / T 1043.1—2008: Table 3 As shown in Table 3, the polyvinyl chloride cable sheath material prepared by the present invention has high impact strength.

[0076] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, shall be within the protection scope of the present invention as long as they do not exceed the spirit covered by the specification.

Claims

1. A polyvinyl chloride cable with excellent mechanical properties, characterized in that, Including cable core and cable sheath materials; The cable core is a copper core; The cable sheath material is made of the following components by weight: 78-82 parts PVC resin, 1-1.5 parts polyethylene wax, 2-3 parts silicon carbide, 20-25 parts calcium carbonate, 10-14 parts composite inorganic fiber, 1.6-1.8 parts antioxidant, 1-2 parts calcium zinc stabilizer, 2-3 parts stearic acid, 2-4 parts dioctyl sebate, and 1-1.5 parts borate.

2. The polyvinyl chloride cable with excellent mechanical properties according to claim 1, characterized in that: The method for preparing the composite inorganic fiber is as follows: (1) First, the inorganic fiber is impregnated in acetone, the temperature is adjusted to 100°C, and it is kept warm and stirred for 30 minutes. Then it is filtered and then placed in a drying oven for drying. The drying temperature was 80℃ and the drying time was 50 minutes. (2) Add organic solvent to the reactor, adjust the temperature to 80°C, keep it warm for 10 min, then add DOPO and inorganic fiber, stir until dissolved, and obtain a mixed system; The stirring speed is 500 r / min; (3) Add vinyltrimethoxysilane and azobisisobutyronitrile sequentially to an organic solvent, stir and mix evenly to obtain a modified solution; The stirring speed is 250 r / min; (4) The modified liquid was added to the mixing system by dripping, the temperature was adjusted to 85°C, and the mixture was kept warm and stirred for 4 hours. Then it was ultrasonically treated for 10 minutes, and finally filtered, washed and dried to obtain composite inorganic fibers.

3. A polyvinyl chloride cable with excellent mechanical properties according to claim 2, characterized in that: In step (1), the inorganic fiber is basalt fiber; The basalt fiber and acetone are mixed in a mass ratio of 1:

5.

4. A polyvinyl chloride cable with excellent mechanical properties according to claim 2, characterized in that: The organic solvent in step (2) is diethylene glycol dimethyl ether; The ratio of diethylene glycol dimethyl ether to DOPO and inorganic fiber is 200mL:3-5g:20-22g.

5. A polyvinyl chloride cable with excellent mechanical properties according to claim 2, characterized in that: In step (3), the mixing ratio of vinyltrimethoxysilane, azobisisobutyronitrile, and organic solvent is 6-8g: 1-2g: 150mL; The organic solvent is diethylene glycol dimethyl ether.

6. A polyvinyl chloride cable with excellent mechanical properties according to claim 2, characterized in that: In step (4), the mass ratio of the modified liquid to the mixed system is 1:1-1.5; The addition of the modified liquid droplets took 1 hour to complete. The ultrasonic frequency is 40kHz.

7. A polyvinyl chloride cable with excellent mechanical properties according to claim 1, characterized in that: The polyethylene wax and borate are mixed in a weight ratio of 1:

1.

8. A polyvinyl chloride cable with excellent mechanical properties according to claim 3, characterized in that: The borate is zinc borate.

9. A polyvinyl chloride cable with excellent mechanical properties according to claim 1, characterized in that: The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid].

10. The method for preparing a polyvinyl chloride cable with excellent mechanical properties according to claim 1, characterized in that: Includes the following steps: (1) Weigh each component raw material according to its respective weight parts; (2) Add each component to the mixer and mix at 1000 r / min for 30 min at 80°C; (3) The mixed materials are compounded and extruded to form a composite material, which is then coated onto the surface of the cable core to obtain a polyvinyl chloride cable; The mixing temperature was 165℃ and the time was 10 minutes.

Images