High-strength composite electric power tube and preparation process thereof

Abstract

The invention relates to a high-strength composite electric power tube and a preparation process thereof. The preparation process comprises the following steps: step 1, preparing the following raw materials in parts by weight: 60-70 parts of PVC resin, 5-8 parts of acrylate rubber, 1-3 parts of modified carbon nanotubes, 0.5 part of modified hollow glass beads, 0.5-0.7 part of a lubricant and 0.3 part of a composite stabilizer; secondly, mixing, melting and extruding the raw materials in the first step to obtain a heat pipe blank; and thirdly, shaping and cooling the heat pipe blank to obtain the high-strength composite electric power tube. Wherein the modified carbon nanotubes contain DOPO, hindered amine, benzene rings and silica chain structures and have high flame retardance, oxidation resistance and impact resistance, the modified hollow glass beads have the characteristics of high strength and high modulus, the modified hollow glass beads serve as reinforcing particles of the electric power tube to improve the mechanical property of the tube, and due to the fact that the modified hollow glass beads are extremely low in dielectric constant and excellent in dielectric stability, therefore, the tube has excellent electrical insulating property.

Description

technical field [0001] The invention belongs to the technical field of pipe material preparation, and in particular relates to a high-strength composite power pipe and a preparation process thereof. Background technique [0002] Power pipe is a hard rubber pipe for electrical installation and wiring, including PVC and PE threading pipes. The threading pipe needs to meet the requirements of anti-corrosion, anti-leakage and flame retardant. The formula of PVC plastic pipe is mainly composed of PVC resin and additives. Among them, the additives are further divided into heat stabilizers, lubricants, processing modifiers, impact modifiers, fillers, anti-aging agents, colorants, etc. according to their functions. [0003] Chinese Patent Publication No. CN111040342A discloses a PVC power pipe material, the parts by weight of which are: 150 parts of polyvinyl chloride resin with a particle size of 0.1-0.3 mm, and 20-40 parts of calcium carbonate with a particle size of 300 mm-800 mm...

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Problems solved by technology

[0003] Chinese Patent Publication No. CN111040342A discloses a PVC power pipe material, the parts by weight of which are: 150 parts of polyvinyl chloride resin with a particle size of 0.1-0.3 mm, and 20-40 parts of calcium carbonate with a particle size of 300 mm-800 mm , impact modifier ACR 6-15 parts, composite lead salt stabilizer 3-8 parts, lubricant oxidized polyethylene wax 0.5-3 parts, nano-scale inorganic flame retardant 4-13 parts; the PVC power pipe material of the invention The flame retardant performance is good, but there are many inorganic nanoparticles added, such as calcium carbonate and inorganic flame retardants. Although the flame retardant performance of the product is improved, the compatibility of these inorganic particles with the polymer matrix is ​​poor and they are easy to agglomerate , will cause uneven distribution, and the phenomenon of low bending resistance of the pipe will appear. Therefore, improving a high-strength composite power pipe with good flame retardancy and good mechanical properties is a technical problem that needs to be solved at present.

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