An anti-interference high-strength PVC cable

Abstract

The present invention discloses an anti-interference high-strength polyvinyl chloride cable, including an outer protective layer, an anti-interference layer, etc. The outer protective layer is prepared from the following raw materials: polyvinyl chloride, graphene oxide, polyurethane acrylate, nano calcium carbonate, butyl rubber. The polyurethane acrylate contains double bonds and reacts with the hydroxyl groups on the surface of nano calcium carbonate to form covalent bonds, firmly connecting the polyurethane acrylate with calcium carbonate, which can improve the dispersibility of calcium carbonate and increase its compatibility with polyvinyl chloride. At the same time, the polymerization reaction occurs between the isocyanate groups on the polyurethane acrylate and the hydroxyl and carboxyl groups on the surface of graphene oxide. Therefore, the polyurethane acrylate can evenly disperse nano calcium carbonate and graphene oxide between polyvinyl chloride, synergistically improving the tensile strength and wear resistance of the outer protective layer, and providing an anti-interference high-strength polyvinyl chloride cable.

Description

Technical Field

[0001] The present invention belongs to the field of cables and relates to an anti-interference high-strength polyvinyl chloride cable. Background Art

[0002] A cable is a device for transmitting electrical energy or signals, usually composed of several or several groups of wires. Cables include power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single-strand or multi-strand wires and an insulating layer, and are used to connect circuits, electrical appliances, etc. There is a covering layer of one or several layers of metal or non-metal materials outside the cable. The protective layer of the cable is used to protect the insulating layer from being damaged by external forces and the intrusion of moisture during transportation, laying, and use.

[0003] At present, most of the cables on the market are only sleeved with a protective sleeve on the outside, or their tensile and wear-resistant properties need to be further improved. On the one hand, they cannot effectively resist electromagnetic shielding, and at the same time, the cables do not have good tensile strength. If too much force is applied during laying, the cables may break. Polyvinyl chloride, as a commonly used material in industries such as power cables, building decoration, and packaging and transportation, has extremely large consumption and demand, a huge market circulation volume, and good development prospects. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-interference high-strength polyvinyl chloride cable, including an outer protective layer, an anti-interference layer, etc. The outer protective layer is prepared from the following raw materials: polyvinyl chloride, graphene oxide, polyurethane acrylate, nano calcium carbonate, butyl rubber. The polyurethane acrylate contains double bonds, reacts with the hydroxyl groups on the surface of nano calcium carbonate to form covalent bonds, firmly connects the polyurethane acrylate with calcium carbonate, can improve the dispersion of calcium carbonate, increase its compatibility with polyvinyl chloride, and at the same time, the isocyanate groups on the polyurethane acrylate react with the hydroxyl groups and carboxyl groups on the surface of graphene oxide. Therefore, the polyurethane acrylate can evenly disperse nano calcium carbonate and graphene oxide between polyvinyl chloride, synergistically improving the anti-tensile strength and wear resistance of the outer protective layer, and providing an anti-interference high-strength polyvinyl chloride cable, which is realized through the following technical solutions:

[0005] An anti-interference high-strength polyvinyl chloride cable includes an outer protective layer, a braided layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer, and a conductor core. The outer protective layer is prepared from the following raw materials: 18 - 20 parts by weight of polyvinyl chloride, 5 - 8 parts by weight of graphene oxide, 10 - 12 parts by weight of polyurethane acrylate, 4 - 8 parts by weight of nano calcium carbonate, and 1 - 3 parts by weight of butyl rubber.

[0006] As a preferred technical solution of the present invention, there are a total of 3 inner cores of the conductor, arranged in a triangular pattern. The inner cores of the conductor are wrapped with an inner insulating layer, and a filling layer is filled between the inner insulating layer and the anti-interference layer. The anti-interference layer is successively wrapped with an outer insulating layer, a braided layer, and an outer protective layer. A layer of anti-ultraviolet coating containing methyl salicylate is coated on the surface of the outer protective layer.

[0007] As a preferred technical solution of the present invention, the material of the braided layer is any one of nylon 66 or nylon 12.

[0008] As a preferred technical solution of the present invention, the degree of polymerization of the polyvinyl chloride is 1300 - 1800.

[0009] As a preferred technical solution of the present invention, the polyurethane acrylate is prepared from toluene diisocyanate, polyethylene glycol, and hydroxy acrylate in a weight ratio of 3:1:2.

[0010] As a preferred technical solution of the present invention, the preparation method of the outer protective layer comprises the following steps:

[0011] a1: Weigh the raw materials according to the raw materials of the outer protective layer and the weight parts of each raw material;

[0012] a2: Add nano calcium carbonate into the polyurethane acrylate, then add butyl rubber and stir for 2 - 5 min, and heat in a water bath to obtain X1;

[0013] a3: Add graphene oxide into X1, stir for 5 - 10 min, and heat in a water bath to obtain X2;

[0014] a4: Place X2, polyvinyl chloride, and butyl rubber in a high-speed disperser and disperse for 30 min under the condition of 5000 - 5800 r / min, then put them into a two-roll mill for mixing. The temperature of the front roll is 120 - 130 °C, and the temperature of the rear roll is 100 - 110 °C. Mix for 8 - 12 min, extrude the mixture, and wrap it on the surface of the braided layer to form the outer protective layer, and finally obtain an anti-interference high-strength polyvinyl chloride cable.

[0015] As a preferred technical solution of the present invention, in step a2 of the preparation method of the outer protective layer, the temperature of the water bath heating is 80 - 85 °C, and the time of the water bath heating is 0.5 - 1 h.

[0016] As a preferred technical solution of the present invention, in step a3 of the preparation method of the outer protective layer, the temperature of the water bath heating is 55 - 60 °C, and the time of the water bath heating is 2.5 - 3 h.

[0017] An application of an anti-interference high-strength polyvinyl chloride cable, and the application includes underground power transmission, signal and data transmission.

[0018] Advantages of the present invention:

[0019] (1) An anti-interference high-strength polyvinyl chloride cable provided by the present invention combines the anti-interference layer and the outer protective layer of the cable, having both good anti-interference performance and good anti-tensile and wear-resistant performance, and having a broad application market.

[0020] (2) An anti-interference high-strength polyvinyl chloride cable provided by the present invention improves the anti-tensile and wear-resistant performance of the cable from multiple angles by optimizing the outer protective layer of the cable, adding a nylon braid layer, and under the synergistic action of graphene oxide and nano-calcium carbonate. Specific embodiments

[0021] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines examples to describe in detail the specific embodiments, structures, features and effects according to the present invention.

[0022] Example 1

[0023] An anti-interference high-strength polyvinyl chloride cable includes an outer protective layer, a braid layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer and a conductor core. The outer protective layer is prepared from the following raw materials: 20 parts by weight of polyvinyl chloride, 6 parts by weight of graphene oxide, 12 parts by weight of polyurethane acrylate, 6 parts by weight of nano-calcium carbonate, and 2 parts by weight of butyl rubber.

[0024] There are a total of 3 conductor cores, arranged in a triangular pattern. The conductor cores are wrapped with an inner insulating layer, and the filling layer is filled between the inner insulating layer and the anti-interference layer. The anti-interference layer is then successively wrapped with an outer insulating layer, a braid layer, and an outer protective layer. A layer of anti-ultraviolet coating containing methyl salicylate is coated on the surface of the outer protective layer.

[0025] The material of the braid layer is nylon 66.

[0026] The degree of polymerization of the polyvinyl chloride is 1360.

[0027] The polyurethane acrylate is prepared from toluene diisocyanate, polyethylene glycol and hydroxy acrylate in a weight ratio of 3:1:2.

[0028] The preparation method of the outer protective layer includes the following steps:

[0029] a1: Weigh the raw materials according to the raw materials of the outer protective layer and the weight parts of each raw material;

[0030] a2: Add nano-calcium carbonate to polyurethane acrylate, then add butyl rubber and stir for 5 minutes, and heat in a water bath to obtain X1;

[0031] a3: Add graphene oxide to X1, stir for 5 min, and heat it in a water bath to obtain X2;

[0032] a4: Place X2, polyvinyl chloride, and butyl rubber in a high-speed disperser and disperse them for 30 min under the condition of 5200 r / min. Then put them into a two-roll mill for mixing. The temperature of the front roll is 125 °C, and the temperature of the rear roll is 100 °C. Mix for 10 min, extrude the mixture, and wrap it on the surface of the braided layer to form an outer protective layer, and finally obtain a high-strength polyvinyl chloride cable with anti-interference performance.

[0033] In step a2 of the preparation method of the outer protective layer, the temperature of the water bath heating is 85 °C, and the time of the water bath heating is 1 h.

[0034] In step a3 of the preparation method of the outer protective layer, the temperature of the water bath heating is 60 °C, and the time of the water bath heating is 2.5 h.

[0035] The preparation method of the inner insulating layer and the outer insulating layer is as follows: Mix the raw materials for preparing cable insulating material, namely polyvinyl chloride resin, dioctyl phthalate, epoxidized soybean oil, chlorinated paraffin, dioctyl terephthalate, kaolin, light calcium carbonate, stabilizer, ethylene bisstearamide, barium stearate, and stearic acid at 105 °C, and then plasticize and granulate at 145 °C to obtain cable insulating material. Add the cable insulating material into the extruder through the feeding part, and extrude and wrap to prepare the cable insulating layer.

[0036] The preparation method of the anti-interference layer is as follows: Select the raw materials polyvinyl chloride, tinned copper scraps, calcium stearate, conductive carbon black, nano calcium carbonate, magnesium, binder, antioxidant, methyl silicone oil, silicon dioxide, dibutylhydroxytoluene, and thermal resistance mixture. Add polyvinyl chloride, calcium stearate, nano calcium carbonate, magnesium, silicon dioxide, and dibutylhydroxytoluene into the mixing blender, stir for 15 min, control the speed of the mixing blender at 600 r / min, and control the stirring temperature at 150 °C. After stirring, continue to add tinned copper scraps, conductive carbon black, and thermal resistance mixture into the mixing blender, stir for 20 min, control the speed of the mixing blender at 560 r / min, and control the stirring temperature at 125 °C. Slowly add the binder, antioxidant, and methyl silicone oil into the mixing blender during the stirring process. After stirring, obtain the anti-interference mixture. Add the anti-interference mixture and the inner core into the extruder, so as to form an anti-interference layer on the surface of the cable inner core.

[0037] The preparation method of the filling layer is as follows: Crush and mix zeolite powder, rubber powder, and filler. After mixing and stirring, pour the binder into the mixed material. At this time, pour the mixed material into the extruder, and finally use the extruder to extrude the mixed material, so as to obtain the filler of the processed filling layer.

[0038] The preparation method of the conductor inner core is as follows: Select high-quality copper single wires, draw and anneal the copper single wires, and use a stranding machine to strand multiple metal wires in a regular concentric stranding method to obtain the cable inner core.

[0039] The application of an anti-interference high-strength polyvinyl chloride cable is the application of underground power transmission.

[0040] Example 2

[0041] An anti-interference high-strength polyvinyl chloride cable includes an outer protective layer, a braided layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer, and a conductor inner core. The outer protective layer is prepared from the following raw materials: 20 parts by weight of polyvinyl chloride, 8 parts by weight of graphene oxide, 12 parts by weight of polyurethane acrylate, 8 parts by weight of nano calcium carbonate, and 2 parts by weight of butyl rubber

[0042] There are a total of 3 conductor inner cores, arranged in a triangular pattern. The conductor inner cores are wrapped with an inner insulating layer. The filling layer is filled between the inner insulating layer and the anti-interference layer. The anti-interference layer is further wrapped with an outer insulating layer, a braided layer, and an outer protective layer in sequence. A layer of anti-ultraviolet coating containing methyl o-hydroxybenzoate is coated on the surface of the outer protective layer.

[0043] The material of the braided layer is nylon 66.

[0044] The degree of polymerization of the polyvinyl chloride is 1360.

[0045] The polyurethane acrylate is prepared from toluene diisocyanate, polyethylene glycol, and hydroxy acrylate in a weight ratio of 3:1:2.

[0046] The preparation method of the outer protective layer includes the following steps:

[0047] a1: Weigh the raw materials according to the raw materials of the outer protective layer and the weight parts of each raw material;

[0048] a2: Add nano calcium carbonate to polyurethane acrylate, then add butyl rubber and stir for 5 minutes, and heat in a water bath to obtain X1;

[0049] a3: Add graphene oxide to X1, stir for 8 minutes, and heat in a water bath to obtain X2;

[0050] a4: Place X2, polyvinyl chloride, and butyl rubber in a high-speed disperser and disperse for 30 minutes under the condition of 5800 r / min, then put them into a two-roll mill for mixing. The temperature of the front roll is 130 °C, and the temperature of the rear roll is 110 °C. Mix for 12 minutes, extrude the mixture, and wrap it on the surface of the braided layer to form the outer protective layer, and finally obtain an anti-interference high-strength polyvinyl chloride cable.

[0051] In step a2 of the preparation method of the outer protective layer, the water bath heating temperature is 85°C, and the water bath heating time is 1 h.

[0052] In step a3 of the preparation method of the outer protective layer, the water bath heating temperature is 60°C, and the water bath heating time is 2.5 h.

[0053] The preparation methods of the inner insulating layer and the outer insulating layer are as follows: Mix the raw materials for preparing cable insulating material, namely polyvinyl chloride resin, dioctyl phthalate, epoxidized soybean oil, chlorinated paraffin, dioctyl terephthalate, kaolin, light calcium carbonate, stabilizer, ethylene bisstearamide, barium stearate, and stearic acid, at 105°C, and then pelletize by plasticizing at 145°C to obtain cable insulating material. Add the cable insulating material into an extruder through a feeding part and extrude to prepare the cable insulating layer.

[0054] The preparation method of the anti-interference layer is as follows: Select raw materials including polyvinyl chloride, tinned copper scraps, calcium stearate, conductive carbon black, nano calcium carbonate, magnesium, binder, antioxidant, methyl silicone oil, silicon dioxide, dibutylhydroxytoluene, and a thermal resistance mixture. Add polyvinyl chloride, calcium stearate, nano calcium carbonate, magnesium, silicon dioxide, and dibutylhydroxytoluene into a mixing blender and stir for 15 min. Control the speed of the mixing blender at 600 r / min and the stirring temperature at 150°C. After stirring, continue to add tinned copper scraps, conductive carbon black, and the thermal resistance mixture into the mixing blender and stir for 15 min. Control the speed of the mixing blender at 550 r / min and the stirring temperature at 125°C. Slowly add the binder, antioxidant, and methyl silicone oil into the mixing blender during the stirring process. After stirring, obtain the anti-interference mixture. Add the anti-interference mixture and the inner core into an extruder to form an anti-interference layer on the surface of the cable inner core.

[0055] The preparation method of the filling layer is as follows: Crush and mix zeolite powder, rubber powder, and filler. After mixing and stirring, pour the binder into the mixed materials. Then pour the mixed materials into an extruder, and finally, the extruder can extrude the mixed materials to obtain the filler of the processed filling layer.

[0056] The preparation method of the conductor inner core is as follows: Select high-quality copper single wires, draw and anneal the copper single wires, and use a stranding machine to strand multiple metal wires in a regular concentric stranding method to obtain a cable inner core.

[0057] An application of an anti-interference high-strength polyvinyl chloride cable, and the application of the cable is for underground power transmission.

[0058] Example 3

[0059] An anti-interference high-strength PVC cable, comprising an outer protective layer, a braided layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer and a conductor core. The outer protective layer is prepared from the following raw materials: 20 parts by weight of polyvinyl chloride, 5 parts by weight of graphene oxide, 12 parts by weight of polyurethane acrylate, 5 parts by weight of nano calcium carbonate, and 2 parts by weight of butyl rubber.

[0060] There are a total of 3 conductor cores, arranged in a triangular pattern. The conductor cores are wrapped with an inner insulating layer. The filling layer is filled between the inner insulating layer and the anti-interference layer. The anti-interference layer is then successively wrapped with an outer insulating layer, a braided layer, and an outer protective layer. A layer of anti-ultraviolet coating containing methyl o-hydroxybenzoate is applied on the surface of the outer protective layer.

[0061] The material of the braided layer is nylon 66.

[0062] The degree of polymerization of the polyvinyl chloride is 1360.

[0063] The polyurethane acrylate is prepared from toluene diisocyanate, polyethylene glycol and hydroxy acrylate in a weight ratio of 3:1:2.

[0064] The preparation method of the outer protective layer comprises the following steps:

[0065] a1: Weigh the raw materials according to the raw materials of the outer protective layer and the weight parts of each raw material;

[0066] a2: Add nano calcium carbonate to polyurethane acrylate, then add butyl rubber and stir for 5 min, and heat in a water bath to obtain X1;

[0067] a3: Add graphene oxide to X1, stir for 10 min, and heat in a water bath to obtain X2;

[0068] a4: Place X2, polyvinyl chloride and butyl rubber in a high-speed disperser and disperse for 30 min under the condition of 5800 r / min, then put them into a two-roll mill for mixing. The temperature of the front roll is 130 °C, the temperature of the rear roll is 100 °C, and mix for 10 min. Extrude the mixture and wrap it on the surface of the braided layer to form an outer protective layer, and finally obtain an anti-interference high-strength PVC cable.

[0069] The water bath heating temperature in step a2 of the preparation method of the outer protective layer is 82 °C, and the water bath heating time is 0.5 h.

[0070] The water bath heating temperature in step a3 of the preparation method of the outer protective layer is 60 °C, and the water bath heating time is 2.5 h.

[0071] The preparation methods of the inner insulating layer and the outer insulating layer are as follows: Mix the raw materials for preparing cable insulating material, namely polyvinyl chloride resin, dioctyl phthalate, epoxidized soybean oil, chlorinated paraffin, dioctyl terephthalate, kaolin, light calcium carbonate, stabilizer, ethylene bisstearamide, barium stearate, and stearic acid at 105°C, and then plasticize and granulate at 140°C to obtain cable insulating material. Add the cable insulating material into the extruder through the feeding part, and extrude and coat to prepare the cable insulating layer.

[0072] The preparation method of the anti-interference layer is as follows: Select the raw materials polyvinyl chloride, tinned copper scraps, calcium stearate, conductive carbon black, nano calcium carbonate, magnesium, adhesive, antioxidant, methyl silicone oil, silicon dioxide, dibutylhydroxytoluene, and thermal resistance mixture. Add polyvinyl chloride, calcium stearate, nano calcium carbonate, magnesium, silicon dioxide, and dibutylhydroxytoluene into the mixing blender, stir for 20 minutes, control the speed of the mixing blender at 800 r / min, and control the stirring temperature at 200°C. After stirring, continue to add tinned copper scraps, conductive carbon black, and thermal resistance mixture into the mixing blender, stir for 20 minutes, control the speed of the mixing blender at 800 r / min, and control the stirring temperature at 130°C. Slowly add the adhesive, antioxidant, and methyl silicone oil into the mixing blender during the stirring process. After stirring, obtain the anti-interference mixture. Add the anti-interference mixture and the inner core into the extruder to form an anti-interference layer on the surface of the cable inner core.

[0073] The preparation method of the filling layer is as follows: Crush and mix zeolite powder, rubber powder, and filler. After mixing and stirring, pour the adhesive into the mixed material, then pour the mixed material into the extruder, and finally use the extruder to extrude the mixed material to obtain the filler of the processed filling layer.

[0074] The preparation method of the conductor inner core is as follows: Select high-quality copper single wires, draw and anneal the copper single wires, and use a stranding machine to strand multiple metal wires in a regular concentric stranding method to obtain the cable inner core.

[0075] The application of an anti-interference high-strength polyvinyl chloride cable, and the application of the cable is for underground power transmission.

[0076] Comparative Example 1

[0077] On the basis of Example 3, replace nano calcium carbonate with graphene oxide of equal weight.

[0078] Comparative Example 2

[0079] An anti-interference high-strength PVC cable, comprising an outer protective layer, a braided layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer and a conductor core. The outer protective layer is prepared from the following raw materials: 20 parts by weight of polyvinyl chloride, 11 parts by weight of graphene oxide, 11 parts by weight of nano calcium carbonate, and 2 parts by weight of butyl rubber.

[0080] There are a total of 3 conductor cores, arranged in a triangular pattern. The conductor cores are wrapped with an inner insulating layer. The filling layer is filled between the inner insulating layer and the anti-interference layer. The anti-interference layer is then sequentially wrapped with an outer insulating layer, a braided layer, and an outer protective layer. A layer of anti-ultraviolet coating containing methyl o-hydroxybenzoate is applied on the surface of the outer protective layer.

[0081] The material of the braided layer is nylon 66.

[0082] The degree of polymerization of the polyvinyl chloride is 1360.

[0083] The preparation method of the outer protective layer includes the following steps:

[0084] a1: Weigh the raw materials according to the raw materials of the outer protective layer and the weight parts of each raw material;

[0085] a2: Place the nano calcium carbonate, graphene oxide, polyvinyl chloride and butyl rubber in a high-speed disperser and disperse them for 30 minutes at 5800 r / min, then put them into a two-roll mill for mixing. The temperature of the front roll is 130 °C, and the temperature of the rear roll is 100 °C. Mix for 10 minutes, extrude the mixture and wrap it on the surface of the braided layer to form an outer protective layer, and finally obtain an anti-interference high-strength PVC cable.

[0086] The preparation methods of the inner insulating layer and the outer insulating layer are as follows: Mix the raw materials for preparing cable insulating material, namely polyvinyl chloride resin, dioctyl phthalate, epoxy soybean oil, chlorinated paraffin, dioctyl terephthalate, kaolin, light calcium carbonate, stabilizer, ethylene bis-stearamide, barium stearate and stearic acid at 105 °C, and then plasticize and granulate at 140 °C to obtain cable insulating material. Add the cable insulating material to the extruder through a feeding part and extrude and wrap to prepare the cable insulating layer.

[0087] The preparation method of the anti-interference layer is as follows: select raw materials including polyvinyl chloride, tinned copper scraps, calcium stearate, conductive carbon black, nano calcium carbonate, magnesium, binder, antioxidant, methyl silicone oil, silicon dioxide, dibutylhydroxytoluene and heat resistance mixture. Add polyvinyl chloride, calcium stearate, nano calcium carbonate, magnesium, silicon dioxide and dibutylhydroxytoluene into a mixing blender, stir for 20 minutes, control the speed of the mixing blender at 800 r / min, and control the stirring temperature at 200 °C. After stirring, continue to add tinned copper scraps, conductive carbon black and heat resistance mixture into the mixing blender, stir for 20 minutes, control the speed of the mixing blender at 800 r / min, and control the stirring temperature at 130 °C. Slowly add the binder, antioxidant and methyl silicone oil into the mixing blender during the stirring process. After stirring, obtain the anti-interference mixture. Add the anti-interference mixture and the inner core into an extruder, thereby forming an anti-interference layer on the surface of the cable inner core.

[0088] The preparation method of the filling layer is as follows: crush and mix zeolite powder, rubber powder and filler. After mixing and stirring, pour the binder into the mixed material. Then pour the mixed material into an extruder. Finally, the mixed material can be extruded by the extruder to obtain the filler of the processed filling layer.

[0089] The preparation method of the conductor inner core is as follows: select high-quality copper single wires, draw and anneal the copper single wires, and use a stranding machine to strand multiple metal wires in a regular concentric stranding method to obtain a cable inner core.

[0090] The application of an anti-interference high-strength polyvinyl chloride cable, and the application of the cable is for underground power transmission.

[0091] Comparative Example 3

[0092] On the basis of Example 3, replace graphene oxide with nano calcium carbonate of equal weight.

[0093] Performance test:

[0094] 1. Test of tensile strength

[0095] Test materials: the outer protective layers of the anti-interference high-strength polyvinyl chloride cables prepared in Examples 1 to 3 and Comparative Examples 1 to 3.

[0096] Test method: Tensile property test: Test according to GB / T 1040.1-2018, prepare dumbbell-shaped standard specimens, and the tensile speed is 50 mm / min.

[0097] Test results: 6 batches of samples were determined according to law, and the results are shown in Table 1.

[0098] Table 1 Test of tensile strength

[0099]

[0100]

[0101] As can be seen from the test results in Table 1, graphene oxide and nano-calcium carbonate after being processed by the process of the present invention can synergistically improve the tensile resistance of the cable.

[0102] 2. Abrasion Resistance Test

[0103] Test Materials: The outer protective layers of the anti-interference high-strength polyvinyl chloride cables prepared in Examples 1 to 3 and Comparative Examples 1 to 3.

[0104] Test Method: Press the material into a 3-mm-thick sheet, weigh the mass of the sheet accurately to 0.0001 g; fix the sheet on an abrasion tester and conduct a certain number of abrasions under the same conditions; remove the sheet and weigh it, and the worn mass can be used as a parameter to evaluate the abrasion resistance of the material (the smaller the worn mass, the better the abrasion resistance of the material).

[0105] Test Results: Six batches of samples were determined according to the law, and the results are shown in Table 2:

[0106] Table 2 Abrasion Resistance Test Results

[0107] Group Wear mass / g Example 1 0.9748 Example 2 0.9654 Example 3 0.9413 Comparative Example 1 1.0396 Comparative Example 2 1.3125 Comparative Example 3 1.0049

[0108] As can be seen from the data in Table 2, graphene oxide and nano-calcium carbonate after being processed by the process of the present invention can synergistically improve the abrasion resistance.

[0109] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to be equivalent embodiments within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An anti-interference high-strength polyvinyl chloride cable, characterized in that: The invention comprises an outer protective layer, a braided layer, an outer insulating layer, an anti-interference layer, a filling layer, an inner insulating layer and a conductor core, wherein the outer protective layer is prepared from the following raw materials: 8 to 20 parts by weight of polyvinyl chloride, 5 to 8 parts by weight of graphene oxide, 10 to 12 parts by weight of polyurethane acrylate, 4 to 8 parts by weight of nano calcium carbonate and 1 to 3 parts by weight of butyl rubber.

2. The anti-interference high-strength polyvinyl chloride cable according to claim 1, characterized in that: There are three conductor cores in total, arranged in a triangle. The conductor core is wrapped with an inner insulating layer, a filling layer is filled between the inner insulating layer and the anti-interference layer, and the anti-interference layer is wrapped with an outer insulating layer, a braided layer, and an outer protective layer in sequence. The surface of the outer protective layer is coated with an anti-UV coating containing methyl o-hydroxybenzoate.

3. The anti-interference high-strength polyvinyl chloride cable according to claim 1, characterized in that: The material of the braided layer is any one of nylon 66 and nylon 12.

4. The anti-interference high-strength polyvinyl chloride cable according to claim 1, characterized in that: The polymerization degree of the polyvinyl chloride is 1300-1800.

5. The anti-interference high-strength polyvinyl chloride cable according to claim 1, characterized in that: The polyurethane acrylate is prepared from toluene diisocyanate, polyethylene glycol and hydroxy acrylate in a weight ratio of 3:1:

2.

6. The anti-interference high-strength polyvinyl chloride cable according to claim 1, characterized in that: The preparation method of the outer protective layer comprises the following steps: a1: weighing the raw materials according to the weight proportions of the raw materials for the outer protective layer and each raw material; a2: Add nano calcium carbonate to polyurethane acrylate, then add butyl rubber and stir for 2-5 minutes, and heat in a water bath to obtain X1; a3: Add graphene oxide to X1, stir for 5-10 min, and heat in a water bath to obtain X2; a4: Place X2, polyvinyl chloride and butyl rubber in a high-speed disperser at 5000-5800r / min for 30 minutes, then put them into a double-roll mill for mixing. The temperature of the front roller is 120-130℃, and the temperature of the rear roller is 100-110℃. Mix for 8-12 minutes, extrude the mixture, and wrap it on the surface of the braided layer to form an outer protective layer, and finally obtain an anti-interference high-strength polyvinyl chloride cable.

7. The anti-interference high-strength polyvinyl chloride cable according to claim 6, characterized in that: The water bath heating temperature in step a2 of the method for preparing the outer protective layer is 80-85° C., and the water bath heating time is 0.5-1 h.

8. The anti-interference high-strength polyvinyl chloride cable according to claim 6, characterized in that: The water bath heating temperature in step a3 of the method for preparing the outer protective layer is 55-60° C., and the water bath heating time is 2.5-3 h.

9. An application of the anti-interference high-strength polyvinyl chloride cable according to any one of claims 1 to 8, characterized in that: The applications include power transmission, signal and data transmission.

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