Fire retardant foaming material for halogen-free flame retardant cable and preparation method of fire retardant foaming material

Abstract

The invention relates to a fire retardant foaming material for a halogen-free flame retardant cable and a preparation method of the fire retardant foaming material. The fire retardant foaming material comprises the following components by weight ratio: 100 phr of basic material, 40-50 phr of acid source, 20-25 phr of char forming agent, 10-150 phr of foaming agent, 80-110 phr of ceramic shell forming agent and 20-30 phr of lubricating agent. An effective foaming structure layer increases the temperature gradient of the interior and the surface of the cable to enable the interior temperature to be much lower than the flame temperature, prevents flame from damaging the interior of the cable, isolates external oxygen from the cable, guarantees the cable to be capable of resisting high temperature flame impact and ablation of an HCF (hermetically coated fiber) of 1100 DEG C for a long time, takes effects of fire retardance and heat insulation, is excellent in low-smoke, halogen-free, flame-retardant and soft performance, can be wrapped on the surface of a cable jacket by pressing, and meets the requirement of cable industries and petroleum platform cables on HCF flame resistance.

Description

technical field [0001] The invention relates to a flame-retardant foaming material for a halogen-free flame-retardant cable and a preparation method thereof. The invention relates to the technical field of cables for oil drilling platforms. The fire-resistant foaming material resistant to HCF flame combustion provided by the invention is especially suitable for use in oil drilling platforms where there are many hydrocarbons inflammable, oil, gas, and dust explosions in dangerous areas. Fire safety protection for cable harness blockage in important places such as high-rise buildings, underground railways, large power stations, and important industrial and mining enterprises. Background technique [0002] At present, there are two main types of refractory materials for cables: (1) Mica tape for fire-resistant safety cables. Mica tape is a high-performance mica insulation product with excellent high temperature resistance and combustion resistance. The powder mica tape has goo...

AI Technical Summary

Problems solved by technology

In the early 1990s, intumescent flame retardant appeared again. Under the action of flame, this intumescent flame retardant rapidly expands on the surface of the material through chemical reaction and physical action, forming a porous and dense carbon layer with low thermal conductivity. It can effectively block the conduction of flame heat and play the role of fire resistance and fire resistance; in addition, because the intumescent flame retardant has the advantages of high flame retardant efficiency, less smoke generation, and no dripping, it is also an important component of the current halogen-free flame retardant materials. One of the flame retardants, it is mainly used in the electric power construction industry to block cables and other fire-proof passages. It is rarely used in the production and use of the cable industry, and it is even less reported that it can withstand high temperatures above 1100 ° C.

[0003] Although the refractory mica tape has good fire resistance, especially the artificially synthesized fluorphlogopite mica tape, which does not contain crystal water and has a melting point of 1375°C, it can withstand higher temperatures, has a large safety margin, and has the best high temperature resistance. Because the mica tape is made of mica paper bonded to glass cloth and then squeezed and dried, the mica tape will be scattered in the flame due to the failure and delamination of the adhesive, and then lose most of its Fire protection and protection function, in order to make up for the defects, only multi-layer laminated wrapping can be used, which not only wastes man-hours, but also greatly increases the cost, and the economic benefit is poor

[0004] Flame retardant materials based on the addition of inorganic metal oxides or organic flame retardants can achieve halogen-free, low-smoke flame retardancy and foaming into shells by optimizing flame retardants, but they still cannot meet the needs of the cable industry and Requirements for Oil Platform Cables to Resistance to HCF Flame Combustion

Images