CMR or CMP graded flame retardant cable material

Abstract

The invention provides a CMR or CMP graded flame retardant cable material including polyvinyl chloride, a tetrabromo phthalic anhydride ester-containing plasticizer, a first flame retardant, a second flame retardant, a calcium zinc stabilizer, a lubricant and a processing modifier, wherein based on 100 parts by weight of the polyvinyl chloride, the amount of the plasticizer is 30-50 parts by weight, the amount of the first flame retardant is 30-50 parts by weight, the amount of the calcium zinc stabilizer is 1-5 parts by weight, the amount of the second flame retardant is 10-40 parts by weight, the amount of the lubricant is 0.1-2 parts by weight, and the amount of the processing modifier is 0.1-1 part by weight; the first flame retardant is selected from a combination of aluminum hydroxide and magnesium hydroxide, the second flame retardant is selected from at least four of antimonous oxide, zinc borate, zinc stannate, ammonium octamolybdate and nano clay. The CMR or CMP graded flame retardant cable material has excellent comprehensive performance and processing performance.

Description

technical field [0001] The present invention relates to high-performance cables, and more particularly to CMR or CMP grade flame-retardant cable compounds for forming cable covering materials. Background technique [0002] After China's accession to the WTO, the standards established are basically in line with international standards, and the initial formulation of international cable standards is mostly from Europe, so it can be regarded as a system. The flame-retardant cable standard in the United States is formulated by the unofficial Underwriters Laboratories (UL), which requires flame-retardant cables to be divided into CMX, CM, CMR, and CMP from low to high. [0003] Compared with the European standard, the flame retardant cable standard in the United States adds higher grades of CMR and CMP, especially the highest flame retardant grade CMP (supercharged grade). In order to meet the requirements of this level, the selected polymer has relatively high requirements, or ...

AI Technical Summary

Problems solved by technology

However, due to the addition of a large amount of plasticizers and other additives to PVC cable materials, the flame retardant performance is greatly reduced, and the oxygen index drops to about 24%.

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