Cable jacket rubber and preparation method

Abstract

The invention relates to a cable jacket rubber and a preparation method, wherein the cable jacket rubber has high elastic resilience, softness and abrasive resistance at a low temperature. The cable jacket rubber is characterized in that a base material of the rubber is formed by mixing 30 to 50 weight percent of natural gum and 50 to 70 weight percent of cis-butadiene rubber; a vulcanizing system in a rubber compounding agent is a low-sulfur high-accelerant vulcanizing system, the addition of sulfur is 0.3 to 0.6 weight percent of that of the base material of the rubbere, the addition of the accelerant tetramethylthiuram disulfide is between 1.0 and 1.3 weight percent, the addition of the accelerant N-cyclohexyl-2-benzothiazole sulfonamide is between 1.8 and 2.2 weight percent, and the addition of the accelerant diphenyl disulfide benzothiazole is between 0.6 and 0.9 weight percent. The cable jacket rubber has wide range of working temperature, and can be bent and distorted randomly without cracking at a long-term usage temperature of between 50 DEG C below zero and 70 DEG C, the impact elasticity is high and can reach 42 percent, the specific elongation is more than 350 percent, and the Akron abrasion loss is less than 2 percent, thus the cable jacket rubber is particularly suitable for wind-power generated electricity tower tube cables.

Description

technical field [0001] The invention relates to a cable sheath rubber with high resilience, softness and wear resistance at low temperature and a preparation method thereof, especially for connecting the cable sheath rubber of a wind power station machine chamber and a tower tube, Background technique [0002] Because some cables are used outdoors, they have particularly high requirements for environmental resistance. For example, the vertical cables leading out of the wind turbine tower must meet the wide range of operating temperature from 65°C to -50°C, and can withstand 3,000 twisting times at low temperatures (such as -50°C). Does not crack. The existing base materials for the rubber sheath of wind energy tower flexible cables include: natural rubber (NR), natural rubber + styrene-butadiene rubber binary compound (NR-SBR), chlorinated polyethylene (CPE), neoprene (CR), Vulcanized nitrile rubber + polyvinyl chloride compound (NBR-PVC), and some thermoplastic NBR-PVC com...

AI Technical Summary

Problems solved by technology

This low-temperature rubber composition is mainly developed for rubber sheets. The addition of butadiene rubber can only reach 30%. It can only be used for static cold-resistant products, not for dynamic cold-resistant products such as cable sheaths, support rubber wear resistance and low temperature. The elasticity cannot meet the requirements of the cable sheath rubber; secondly, the vulcanization amount used for vulcanization is as high as 1.5-1.8%, and the heat aging resistance is poor, which will cause the sulfur to migrate to the inside of the cable, causing the copper wire to corrode and blacken, which is not suitable for cables. Allowed; moreover, it is only a simple solution to the problem of rubber cold resistance, many mechanical and physical properties are not fully considered, such as tear resistance, wear resistance

So not suitable for cable sheath

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