Special mixing rubber for insulating low-temperature-resistant wire core, and preparation method thereof

Abstract

The invention discloses a special mixing rubber for an insulating low-temperature-resistant wire core, wherein the components comprise 34-38% of chlorinated polyethylene, 8-12% of ethylene propylene diene monomer, 6-8% of white carbon black, 19-23% of an insulating reinforcing filler, 6-9% of a plasticizer, 5-8% of other matching agents, 15-18% of a flame retardant agent, and 1.8-2.2% of a vulcanization accelerator. According to the present invention, the special mixing rubber has advantages of good low-temperature resistance, no embrittlement in a low temperature environment, good flame retardancy and high insulation resistance, and retains other good comprehensive performances.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a special compound rubber for insulating low temperature resistant wire cores and a preparation method thereof. Background technique [0002] At present, most of the cable insulation materials used in the cable industry are made of ethylene-propylene rubber, natural styrene-butadiene rubber and other materials. Use, generally in the environment of -30 ℃, the physical and mechanical properties will become very poor, the rubber will become brittle, and it will be broken when it is slightly folded. [0003] In the cold winter areas in the north, the temperature often reaches -40°C, and the cable is easily damaged; and the insulation mechanical strength of the above-mentioned rubber is only about 5MPa, and the elongation rate is mostly 250%. Unable to withstand the impact of the environment in which it is used, the phenomenon of fragmentation occurs, which seriously restricts and affects the d...

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Problems solved by technology

[0002] At present, most of the cable insulation materials used in the cable industry are made of ethylene-propylene rubber, natural styrene-butadiene rubber and other materials. Use, generally in the environment of about -30 ° C, the physical and mechanical properties will become very poor, the rubber will be brittle, and it will be broken if it is lightly folded

[0003] In the cold winter areas in the north, the temperature often reaches -40°C, and the cables are easily damaged; and the insulation mechanical strength of the above-mentioned rubber is only about 5MPa, and the elongation is mostly 250%. Unable to withstand the impact of the environment used, the phenomenon of fragmentation occurs, which seriously restricts and affects the development of the cable industry and all aspects of society

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