Electric wire and cable with good compression resistance and processing technology thereof

Abstract

This invention discloses a wire and cable with good compressive strength and its processing technology, relating to the field of cable technology. The wire and cable includes an inner core and a protective layer wrapped around the surface of the inner core. The protective layer is made of 100-150 parts of modified polyethylene, 50-60 parts of composite rubber, 20-35 parts of glass microspheres, 10-15 parts of modified calcium carbonate, 20-30 parts of reinforcing fiber, 30-40 parts of reinforcing material, 5-10 parts of polyphenol oxidase, 5-10 parts of epoxidized soybean oil, and 1-5 parts of zinc borate. The protective layer of the cable is made by using modified polyethylene, composite rubber, glass microspheres, modified calcium carbonate, reinforcing fiber, reinforcing material, polyphenol oxidase, epoxidized soybean oil, and zinc borate to enhance the strength of the protective layer, improve the compressive strength of the cable, reduce the permanent deformation rate of the cable, prevent damage to the inner core, and improve the AC withstand voltage.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a wire and cable with good compressive strength and its processing technology. Background Technology

[0002] Patent application number CN202111078674.X discloses a wire and cable manufacturing process. This process utilizes processing equipment including a base frame, a baffle frame, and a wrapping assembly. The baffle frame is mounted on the upper right side of the base frame, with a feed inlet at its upper end. The wrapping assembly is mounted on the left side of the feed inlet. This invention solves the problems of existing wire and cable wrapping processes, which typically cannot simultaneously wind multiple strands of wrapping material, resulting in poor core processing quality and low efficiency. Furthermore, the inability to apply adhesive to the wrapping material surface affects its adhesion. Additionally, existing wire and cable wrapping processes often use a fixed angle for the wrapping material, hindering accurate adjustment and affecting cable manufacturing quality.

[0003] However, the manufacturing process of this wire and cable also has some problems. For example, the manufactured cable has poor compressive strength, and the permanent deformation rate of the finished cable is high after long-term pressure, which can easily lead to damage to the conductors inside the cable, affecting the normal operation of the cable and resulting in low AC withstand voltage. Summary of the Invention

[0004] The purpose of this application is to provide a wire and cable with good compressive strength and a processing technology to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a wire and cable with good compressive strength, comprising an inner core and a protective layer wrapped around the surface of the inner core. The material of the protective layer comprises 100-150 parts of modified polyethylene, 50-60 parts of composite rubber, 20-35 parts of glass microspheres, 10-15 parts of modified calcium carbonate, 20-30 parts of reinforcing fiber, 30-40 parts of reinforcing material, 5-10 parts of polyphenol oxidase, 5-10 parts of epoxidized soybean oil, and 1-5 parts of zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by preparing silicone rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, diethyl phthalate, and xanthate-based silane coupling agent. The modified calcium carbonate is prepared by preparing calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution.

[0006] Preferably, the ratio of polyethylene, shell powder, talc powder and Bacillus extracellular enzyme in the modified polyethylene is controlled at 6-9:1-2:1-1.5:0.1-0.5.

[0007] Preferably, the modified polyethylene is prepared by: adding shell powder and talc powder into a high-temperature reaction vessel, heating the temperature to 200℃~270℃, taking it out after half an hour, and grinding it with a grinding device. The ground powder is mixed with polyethylene, then poured into pure water, and Bacillus extracellular enzyme is added and stirred for 2 to 3 hours. After dehydration and drying, the mixture is finally heated, extruded, and granulated to obtain modified polyethylene.

[0008] Preferably, the proportions of silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate and xanthate-based silane coupling agent in the composite rubber are controlled at 3-4:3-4:2-3:0.5-1:0.1-0.5.

[0009] Preferably, the method for preparing the composite rubber is as follows: silicone rubber, chloroprene rubber and ethylene propylene diene monomer (EPDM) rubber are melted together and stirred evenly. Then, diethyl phthalate and xanthate silane coupling agent are added and stirred for 5 to 15 minutes. Finally, the mixture is extruded and granulated.

[0010] Preferably, the specific gravity of calcium carbonate, quicklime, cationic starch, coupling agent and tetrabutyl titanate solution in the modified calcium carbonate is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6.

[0011] Preferably, the modified calcium carbonate is prepared by adding calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water into a reaction vessel, stirring and reacting at a temperature of 60℃~70℃ for 30 minutes, then adding tetrabutyl titanate solution, continuing to stir and react, and after the reaction is completed, dehydrating, drying and grinding to obtain modified calcium carbonate.

[0012] Preferably, the reinforcing material is composed of one of mica powder, talc powder, and graphite powder.

[0013] Preferably, the reinforcing fiber is one or two of glass fiber, alumina fiber, cellulose acetate fiber, quartz fiber, polypropylene fiber, and ceramic fiber.

[0014] This invention also proposes a processing technology for wires and cables with good compressive strength, comprising the following steps:

[0015] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0016] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0017] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0018] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0019] In summary, the technical effects and advantages of this invention are as follows:

[0020] The cable's protective layer is made of modified polyethylene, composite rubber, glass microspheres, modified calcium carbonate, reinforcing fibers, reinforcing materials, polyphenol oxidase, epoxidized soybean oil, and zinc borate. This enhances the strength of the protective layer, improves the cable's compressive strength, reduces the cable's permanent deformation rate, prevents damage to the internal core, and improves the AC withstand voltage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the workflow of an embodiment of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0023] Reference Figure 1 Example 1

[0024] This embodiment proposes a wire and cable with good compressive strength, comprising an inner core and a protective layer covering the surface of the inner core. The protective layer is made of 120 parts modified polyethylene, 53 parts composite rubber, 24 parts glass microspheres, 11 parts modified calcium carbonate, 22 parts reinforcing fiber, 31 parts reinforcing material, 6 parts polyphenol oxidase, 6 parts epoxidized soybean oil, and 2 parts zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by processing silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent. Modified calcium carbonate is prepared from calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of polyethylene, shell powder, talc, and Bacillus extracellular enzyme in modified polyethylene is controlled at 6–9:1–2:1–1.5:0.1–0.5. The preparation method of modified polyethylene is as follows: shell powder and talc are added to a high-temperature reaction vessel and heated to 200℃–270℃. After half an hour, the mixture is removed and ground using a grinding device. The ground powder is mixed with polyethylene, then poured into purified water, and the Bacillus extracellular enzyme is added and stirred for 2–3 hours. The modified polyethylene is obtained by dehydration and drying, followed by heating, extrusion, and granulation. The specific gravity of the composite rubber in which silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent are controlled at 3–4:3–4:2–3:0.5–1:0.1–0.5. The preparation method of the composite rubber is as follows: silicone rubber, chloroprene rubber, and EPDM rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate-based silane coupling agent are added and stirring is continued for 5–15 minutes. Finally, the mixture is extruded and granulated. The modified calcium carbonate contains calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of the liquid is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6. The preparation method of modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to the reaction vessel and stirred at 60℃-70℃ for 30 minutes. Then, titanium tetrabutyl ester solution is added and the stirring reaction is continued. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder and graphite powder. The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber and ceramic fiber.

[0025] A processing method for wires and cables with good compressive strength includes the following steps:

[0026] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0027] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0028] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0029] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0030] Reference Figure 1 Example 2

[0031] This embodiment proposes a wire and cable with good compressive strength, comprising an inner core and a protective layer wrapped around the inner core surface. The protective layer is made of 125 parts modified polyethylene, 56 parts composite rubber, 27 parts glass microspheres, 12 parts modified calcium carbonate, 25 parts reinforcing fiber, 36 parts reinforcing material, 7 parts polyphenol oxidase, 7 parts epoxidized soybean oil, and 3 parts zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by preparing silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent. Modified calcium carbonate is prepared from calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of polyethylene, shell powder, talc, and Bacillus extracellular enzyme in modified polyethylene is controlled at 6–9:1–2:1–1.5:0.1–0.5. The preparation method of modified polyethylene is as follows: Shell powder and talc are added to a high-temperature reaction vessel and heated to 200℃–270℃. After half an hour, the mixture is removed and ground using a grinding device. The ground powder is mixed with polyethylene, then poured into purified water. The Bacillus extracellular enzyme is then added and stirred for 2–3 hours to remove impurities. Water drying, followed by heating and extrusion granulation, yields modified polyethylene. The specific gravity of the composite rubber in which silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent are controlled at 3–4:3–4:2–3:0.5–1:0.1–0.5. The preparation method of the composite rubber is as follows: silicone rubber, chloroprene rubber, and EPDM rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate-based silane coupling agent are added and stirring is continued for 5–15 minutes. Finally, the mixture is extruded and granulated. The modified calcium carbonate contains calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity is controlled at 2~3:1~2:0.5~1:0.1~0.5:5~6. The preparation method of modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to the reaction vessel and stirred at 60℃~70℃ for 30 minutes. Then, titanium tetrabutyl ester solution is added and the stirring reaction is continued. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder and graphite powder. The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber and ceramic fiber.

[0032] A processing method for wires and cables with good compressive strength includes the following steps:

[0033] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0034] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0035] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0036] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0037] Reference Figure 1 Example 3

[0038] This embodiment proposes a wire and cable with good compressive strength, comprising an inner core and a protective layer covering the surface of the inner core. The protective layer is made of 140 parts modified polyethylene, 59 parts composite rubber, 34 parts glass microspheres, 12 parts modified calcium carbonate, 21 parts reinforcing fiber, 34 parts reinforcing material, 8 parts polyphenol oxidase, 6 parts epoxidized soybean oil, and 3 parts zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by processing silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent. Modified calcium carbonate is prepared from calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of polyethylene, shell powder, talc, and Bacillus extracellular enzyme in modified polyethylene is controlled at 6–9:1–2:1–1.5:0.1–0.5. The preparation method of modified polyethylene is as follows: shell powder and talc are added to a high-temperature reaction vessel and heated to 200℃–270℃. After half an hour, the mixture is removed and ground using a grinding device. The ground powder is mixed with polyethylene, then poured into purified water, and the Bacillus extracellular enzyme is added and stirred for 2–3 hours. The modified polyethylene is obtained by dehydration and drying, followed by heating, extrusion, and granulation. The specific gravity of the composite rubber in which silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent are controlled at 3–4:3–4:2–3:0.5–1:0.1–0.5. The preparation method of the composite rubber is as follows: silicone rubber, chloroprene rubber, and EPDM rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate-based silane coupling agent are added and stirring is continued for 5–15 minutes. Finally, the mixture is extruded and granulated. The modified calcium carbonate contains calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of the liquid is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6. The preparation method of modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to the reaction vessel and stirred at 60℃-70℃ for 30 minutes. Then, titanium tetrabutyl ester solution is added and the stirring reaction is continued. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder and graphite powder. The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber and ceramic fiber.

[0039] A processing method for wires and cables with good compressive strength includes the following steps:

[0040] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0041] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0042] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0043] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0044] Reference Figure 1 Example 4

[0045] This embodiment proposes a wire and cable with good compressive strength, comprising an inner core and a protective layer covering the surface of the inner core. The protective layer is made of 130 parts modified polyethylene, 57 parts composite rubber, 24 parts glass microspheres, 11 parts modified calcium carbonate, 24 parts reinforcing fiber, 35 parts reinforcing material, 7 parts polyphenol oxidase, 9 parts epoxidized soybean oil, and 4 parts zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by processing silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent. Modified calcium carbonate is prepared from calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of polyethylene, shell powder, talc, and Bacillus extracellular enzyme in modified polyethylene is controlled at 6–9:1–2:1–1.5:0.1–0.5. The preparation method of modified polyethylene is as follows: shell powder and talc are added to a high-temperature reaction vessel and heated to 200℃–270℃. After half an hour, the mixture is removed and ground using a grinding device. The ground powder is mixed with polyethylene, then poured into purified water, and the Bacillus extracellular enzyme is added and stirred for 2–3 hours. The modified polyethylene is obtained by dehydration and drying, followed by heating, extrusion, and granulation. The specific gravity of the composite rubber in which silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent are controlled at 3–4:3–4:2–3:0.5–1:0.1–0.5. The preparation method of the composite rubber is as follows: silicone rubber, chloroprene rubber, and EPDM rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate-based silane coupling agent are added and stirring is continued for 5–15 minutes. Finally, the mixture is extruded and granulated. The modified calcium carbonate contains calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of the liquid is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6. The preparation method of modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to the reaction vessel and stirred at 60℃-70℃ for 30 minutes. Then, titanium tetrabutyl ester solution is added and the stirring reaction is continued. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder and graphite powder. The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber and ceramic fiber.

[0046] A processing method for wires and cables with good compressive strength includes the following steps:

[0047] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0048] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0049] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0050] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0051] Reference Figure 1 Example 5

[0052] This embodiment proposes a wire and cable with good compressive strength, comprising an inner core and a protective layer covering the surface of the inner core. The protective layer is made of 150 parts modified polyethylene, 55 parts composite rubber, 32 parts glass microspheres, 12 parts modified calcium carbonate, 23 parts reinforcing fiber, 33 parts reinforcing material, 7 parts polyphenol oxidase, 8 parts epoxidized soybean oil, and 3 parts zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by processing silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent. Modified calcium carbonate is prepared from calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of polyethylene, shell powder, talc, and Bacillus extracellular enzyme in modified polyethylene is controlled at 6–9:1–2:1–1.5:0.1–0.5. The preparation method of modified polyethylene is as follows: shell powder and talc are added to a high-temperature reaction vessel and heated to 200℃–270℃. After half an hour, the mixture is removed and ground using a grinding device. The ground powder is mixed with polyethylene, then poured into purified water, and the Bacillus extracellular enzyme is added and stirred for 2–3 hours. The modified polyethylene is obtained by dehydration and drying, followed by heating, extrusion, and granulation. The specific gravity of the composite rubber in which silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent are controlled at 3–4:3–4:2–3:0.5–1:0.1–0.5. The preparation method of the composite rubber is as follows: silicone rubber, chloroprene rubber, and EPDM rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate-based silane coupling agent are added and stirring is continued for 5–15 minutes. Finally, the mixture is extruded and granulated. The modified calcium carbonate contains calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity of the liquid is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6. The preparation method of modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to the reaction vessel and stirred at 60℃-70℃ for 30 minutes. Then, titanium tetrabutyl ester solution is added and the stirring reaction is continued. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder and graphite powder. The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber and ceramic fiber.

[0053] A processing method for wires and cables with good compressive strength includes the following steps:

[0054] S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained.

[0055] S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring.

[0056] S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material;

[0057] S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

[0058] The following table compares the conventional wires and cables with those obtained in Examples 1 to 5:

[0059]

[0060] As can be seen from the table above, the compressive strength and AC withstand voltage of the wires and cables prepared by the present invention are significantly improved, the permanent deformation rate is significantly reduced, and embodiment two is the best embodiment.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A type of electric wire and cable with good compressive strength, comprising an inner core and a protective layer covering the surface of the inner core, characterized in that, The protective layer comprises 100-150 parts of modified polyethylene, 50-60 parts of composite rubber, 20-35 parts of glass microspheres, 10-15 parts of modified calcium carbonate, 20-30 parts of reinforcing fiber, 30-40 parts of reinforcing material, 5-10 parts of polyphenol oxidase, 5-10 parts of epoxidized soybean oil, and 1-5 parts of zinc borate. The modified polyethylene is prepared by processing polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme. The composite rubber is prepared by preparing silicone rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, diethyl phthalate, and xanthate-based silane coupling agent. The modified calcium carbonate is prepared by preparing calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution. The specific gravity ratio of polyethylene, shell powder, talc powder, and Bacillus extracellular enzyme in the modified polyethylene is controlled at 6-9:1-2:1-1.5:0.1-0.

5. The modified polyethylene is prepared by adding shell powder and talc powder into a high-temperature reaction vessel, heating the temperature to 200℃~270℃, taking it out after half an hour, and grinding it with a grinding device. The ground powder is mixed with polyethylene, then poured into pure water, and Bacillus extracellular enzyme is added and stirred for 2 to 3 hours. After dehydration and drying, the mixture is heated, extruded, and granulated to obtain modified polyethylene. The specific gravity ratio of silicone rubber, chloroprene rubber, EPDM rubber, diethyl phthalate, and xanthate-based silane coupling agent in the composite rubber is controlled at 3-4:3-4:2-3:0.5-1:0.1-0.

5. The method for preparing the composite rubber is as follows: silicone rubber, chloroprene rubber and ethylene propylene diene monomer (EPDM) rubber are melted and stirred evenly. Then, diethyl phthalate and xanthate silane coupling agent are added and stirred for 5 to 15 minutes. Finally, the mixture is extruded and granulated. The specific gravity of calcium carbonate, quicklime, cationic starch, coupling agent, and tetrabutyl titanate solution in the modified calcium carbonate is controlled at 2-3:1-2:0.5-1:0.1-0.5:5-6. The method for preparing the modified calcium carbonate is as follows: calcium carbonate, quicklime, cationic starch, coupling agent and appropriate amount of deionized water are added to a reaction vessel and stirred at 60℃~70℃ for 30 minutes. Then, a tetrabutyl titanate solution is added and the reaction is continued to be stirred. After the reaction is completed, the mixture is dehydrated, dried and ground to obtain the modified calcium carbonate. The reinforcing material is composed of one of mica powder, talc powder, and graphite powder; The reinforcing fiber is one or two of glass fiber, alumina fiber, acetate fiber, quartz fiber, polypropylene fiber, and ceramic fiber.

2. The processing technology for a wire and cable with good compressive strength according to claim 1, characterized in that, Includes the following steps: S1: Modified polyethylene, composite rubber, modified calcium carbonate and epoxidized soybean oil are added to the reaction vessel, heated and melted and mixed. After stirring evenly, glass microspheres, reinforcing materials and zinc borate are added and the reaction is continued. After stirring evenly, a slurry is obtained. S2: Pour the slurry into the grinding equipment until the particle size of the slurry is controlled at 50μm~90μm. Crush the reinforcing fiber and add it to the ground slurry after crushing. Continue stirring. S3: Add polyphenol oxidase, stir evenly, and keep warm and stir for 1 hour to make a protective layer material; S4: Pour the protective layer material into the extruder and heat it. Pass the inner core through the extrusion hole of the extruder. The inner core is driven to move in the extrusion hole of the extruder. The protective layer material is squeezed into the extrusion hole by the extruder, thus wrapping the surface of the inner core. After cooling and molding, the finished cable is obtained.

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