Nuclear-environment-resistant cable insulation material and preparation method thereof

Abstract

The invention relates to a nuclear-environment-resistant cable insulation material. The cable insulation material is prepared from the following components in parts by mass: 100 parts of ethylene-propylene copolymer-methyl methacrylate copolymer, 135 to 145 parts of mixture of nanometer aluminum hydroxide and aluminum hydroxide, 15 to 20 parts of calcined kaolin, 2.5 to 4.5 parts of mixture of 2,2,4-trimethyl-1,2-hydrogenated quinoline and N-isopropyl-N'-phenyl-p-phenylenediamine, 2.5 to 3.6 parts of mixture of N,N'-bi(2,2,6,6-tetramethyl-4-piperidyl)-1,3-dimethyl formamide and 2-(2'-hydroxyl-5'-tert phenyl) benzotriazole, and the like. A preparation method of the cable insulation material comprises the following steps: sequentially carrying out mixing, rubber filtering, blending, screening and extruding on the matching materials under specific process parameters. According to the cable insulation material provided by the invention, the difficult technical problems that the cable insulation material is poor in irradiation resistance in a cable environment, namely, under a high irradiation condition, and the like, are solved. Thus, the demands of specific high-demand situations, namely, the third generation of nuclear power plants, are satisfied; the requirements of the cable insulation material resistant to a nuclear environment are completely met.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a cable insulating material, more specifically to a nuclear environment-resistant cable insulating material and a preparation method thereof, which is suitable for third-generation nuclear power plants, especially AP1000 shells, which have special requirements for cable insulating materials use of internal cables. Background technique [0002] The increasingly severe energy situation has brought huge development space for China's nuclear power construction. The third-generation nuclear power plant, which represents the advanced technology of nuclear power, has put forward very strict requirements for various supporting products, bringing together the essence of technology from all walks of life. According to the third-generation nuclear power plant The requirements for cable insulation materials put forward by nuclear power plants, cable insulation materials should have very good ...

AI Technical Summary

Problems solved by technology

Some cable materials will produce a lot of smoke and hydrogen halide gas in the event of a fire, causing great damage to personnel and equipment. Therefore, it is necessary for cable insulation materials to have low smoke, halogen-free, and low toxicity.

The rupture of steam pipes caused by nuclear power plant accident conditions, the instantaneous high temperature and high pressure impact has a strong destructive effect on cable materials, chemical spraying at high temperatures will cause corrosion to cable materials, and affect the electrical properties and aging of insulating materials performance

In order to achieve the purpose of flame retardancy, a large amount of flame retardant is required to be added to the cable insulation material, but this method will greatly affect the mechanical properties and electrical insulation properties of the insulation material; therefore, in order to meet the heat resistance and radiation resistance of the insulation material , flame retardant and electrical properties, the current cable insulation materials are difficult to achieve, especially the service life of more than 60 years is a difficult test for the existing cable insulation materials, but the establishment of the third generation of nuclear power plants, especially AP1000 The popularization and application of nuclear power technology urgently needs to solve this problem, which requires cable insulation materials with good performance and a service life of more than 60 years.

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