What are the materials used for flame retardant wires and cables?

I. What is the material of flame retardant wire and cable? The higher the oxygen index of the materials used in flame retardant cables, the better the flame retardant properties, but with the increase in oxygen index, we have to lose some of the other properties. Such as the physical properties of the material and the process performance has decreased, the operation is difficult, and at the same time make the material cost increase, so it is necessary to choose the oxygen index reasonably and appropriately, the oxygen index of the general insulation materials to reach 30, the product can be through the standard C test requirements, if the jacket material, filler materials are flame retardant materials, the product can reach the requirements of class B and class A. Flame retardant wire and cable materials are mainly divided into halogenated flame retardant materials and non-halogenated flame retardant materials. 1, halogenated flame retardant materials due to the decomposition of combustion and heat release of hydrogen halide, hydrogen halide can capture the active radical HO root, so that the combustion of the material to slow down or extinguish to achieve the purpose of flame retardant. Commonly used polyvinyl chloride, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene rubber 1) rubber and other materials 2, halogen-free flame-retardant materials polyolefin is a halogen-free materials, consisting of hydrocarbons, in the combustion decomposition of carbon dioxide and water, does not produce significant smoke and harmful gases. Polyolefin mainly includes polyethylene (PE), ethylene vinyl acetate polymer (E-VA). These materials are not inherently flame retardant and require the addition of inorganic flame retardants and phosphorus series flame retardants to be processed into practical halogen-free flame retardant materials.

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