Low-smoke halogen-free heat-insulating fireproof cable material used for fire-resistant cable, and preparation method and application thereof

Abstract

The invention relates to the field of refractory materials, specifically to a low-smoke halogen-free heat-insulating fireproof cable material used for a fire-resistant cable, and a preparation method and application thereof. The low-smoke halogen-free heat-insulating fireproof cable material provided by the invention comprises the following raw materials by weight: 55 to 90 parts of polyolefin resin, 110 to 160 parts of a functional filling material A, 50 to 95 parts of a functional filling material B, 0 to 7 parts of a flame retardant, 1 to 4 parts of a coupling agent, 8 to 25 parts of a compatibilizing agent, 1 to 5 parts of a lubricant and 0.2 to 2 parts of an antioxidant. The fireproof cable material provided by the invention has good processing performance; the whole preparation process comprises basic steps like batching, material mixing, extrusion granulation, drying and packaging; and the process is simple. The cable material has good flexibility and is convenient to install; during combustion under the flame with a temperature of 500 to 1000 DEG C, the cable material does not drip and can generate a hard shell; meanwhile, the cable material has small shrinkage ratio before and after combustion, so normal operation of internal circuit can be protected; and the cable material can be applied in a fire-resistant filling layer and a heat-insulating fireproof layer of the fire-resistant cable, and has good heat-insulating and fireproof effects.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a low-smoke, halogen-free, heat-insulating and fire-resistant cable material for fire-resistant cables, a preparation method and application thereof. Background technique [0002] In today's society, with the rapid development of economy and science and technology, people's quality of life has been significantly improved, and the protection of personal and property safety in fire is a major concern of people. Therefore, in high-rise buildings, hotels, public entertainment places, large supermarkets, hospitals In densely populated areas such as stations, airports, subways, rail transit, coal mines, and public transportation facilities, it is necessary to maintain the normal operation of power cables and communication signals; The importance of safety is more prominent. People have been constantly exploring and researching how to ensure the smooth flow of power and communicatio...

AI Technical Summary

Problems solved by technology

The special equipment required for magnesium oxide mineral fire-resistant insulated cables is complicated in process, low in efficiency, high in production cost, and very large in investment, and can only be used for low-voltage fire-resistant cables; the bending radius is large; the laying operation is very complicated

The mica tape type fire-resistant cable needs special wrapping equipment, multi-layer winding, cumbersome process, high production cost, and it is easy to be brittle and fall off after burning in a fire, so that the real fireproof effect cannot be achieved.

The ceramic silicone rubber currently on the market has effectively solved many of the above problems, but due to its relatively complicated production process and high price, it is difficult to popularize and apply it widely.

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