Fire-proof material for power cable

Abstract

The invention discloses a fire-proof material for a power cable. The material is prepared from, by weight, 80-120 parts of silicon rubber, 40-50 parts of glass fibers, 15-30 parts of fumed silica treated with D4, 10-20 parts of fumed silica, 30-50 parts of mica, 15-25 parts of quartz powder, 3-5 parts of rutile titanium dioxide, 6-8 parts of coupling agent, 1-3 parts of dual vulcanizing agent 25, 3-5 parts of hydroxyl silicone oil, 4-8 parts of fire retardant and 3-5 parts of heat stabilizer. The fire-proof material has the performance identical to that of a common polymer at normal temperature, the material is the ceramization product has certain strength and can bear certain impact force, the completeness of the product can be kept, meanwhile, excellent machining performance is achieved, particles are even in size, therefore, the discharging amount is stable in the extruding process, it is ensured that an extruding insulation layer is even in thickness, and no decentration is generated.

Description

technical field [0001] The invention relates to the technical field of cable production, in particular to a refractory material for power cables. Background technique [0002] The current technology mainly uses halogen-free low-smoke flame-retardant rubber, mainly silicone rubber, ethylene-propylene rubber and ethylene-vinyl acetate rubber (EVM). play a certain role. However, after continuous high-temperature combustion, the burnt residue has no mechanical strength and turns into ashes, which cannot maintain the integrity of the product, and will cause more dangerous secondary disasters, such as short circuits after the sheath and insulation of the cable are burned. When rubber materials containing inorganic fillers are exposed to flames, the rubber degrades or burns, and the degradation or combustion products volatilize to leave inorganic residues or ash with low strength. These residues are usually not agglomerated or self-supporting, even broken into granules or powder,...

AI Technical Summary

Problems solved by technology

However, after continuous high-temperature combustion, the burnt residue has no mechanical strength and turns into ashes, which cannot maintain the integrity of the product, and will cause more dangerous secondary disasters, such as short circuits after the sheath and insulation of the cable are burned.

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