Fire-resistant communication cable

Abstract

The invention discloses a fire-resistant communication cable. The cable includes four copper-magnesium alloy conductors 1, the outer surface of each copper-magnesium alloy conductor 1 is covered witha polyethylene layer 2 to form a wire 3, the four wires 3 are twisted in pairs to form a first stranded wire pair 41 and a second stranded wire pair 42, a ceramic silicon rubber sheath layer 7 coversthe outer surface of a polyvinyl chloride layer 6, and the ceramic silicon rubber sheath layer 7 is composed of the following components in parts by weight: 70 to 90 parts of methyl vinyl silicone rubber, 10 to 20 parts of an ethylene methacrylic copolymer, 4 to 8 parts of a vinyl trimethoxysilane, 12 to 15 parts of glass powder, 5 to 10 parts of boron nitride, 5 to 15 parts of magnesium oxide, 8to 15 parts of gas-phase method silicon dioxide, 1 to 5 parts of titanium tetraisopropanolate, 0.5 to 2 parts of dicumyl peroxide, 1 to 5 parts of methylphenyldiethoxysilane, 0.4 to 0.8 part of 1,3-dimethyl-6-aminouracil, 0.5 to 1 part of manganese dioxide, 3 to 15 parts of 1,6-bis(diphenylphosphino)hexane, and 1 to 2 parts of an antioxidant. According to the fire-resistant communication cable provided by the invention, the insulation and flame retardancy of the ceramic silicon rubber sheath layer are further improved, so that the insulation and flame retardancy of the cable are enhanced.

Description

technical field [0001] The invention relates to a communication cable, in particular to a fire-resistant communication cable. Background technique [0002] Communication power cables are not only required to have good flexibility for easy laying in narrow spaces or similar situations, but also require ideal flame retardancy to meet the requirements of applications with severe fire ratings. Due to the particularity of its structure, silicone rubber has excellent properties, such as aging resistance, high and low temperature resistance, weather resistance, solvent resistance, electrical insulation, inertness to external heat flow and relatively low heat release rate, etc. It is widely used in the fields of cables, wires, aerospace, automobile and chemical industry. For silicone rubber in the prior art, adding ceramic-forming fillers and sintering aids can produce a ceramic-silicon-rubber composite material that can be molded or extruded. The material can be sintered into a ce...

AI Technical Summary

Problems solved by technology

However, there are many defects in the use of ceramic cables at present. Higher temperature is required to form a ceramic structure, and the structure is unstable, with poor tensile and impact resistance, and cannot perform a good insulation function.

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