Thermoplastic oil resistant halogen free low smoke flame retardant polyolefin cable material and preparation method thereof
The invention relates to a thermoplastic oil resistant halogen free low smoke flame retardant polyolefin cable material. The material is characterized in that: the material is prepared from raw materials of: substrate resin, a fire retardant, a lubricating agent, and an anti oxidant. The substrate resin is composed of metallocene linear low density polyethylene (MLLDPE) an ethylene vinyl acetate polymer, and an interface compatibilizing agent. The preparation method comprises the steps that: the raw materials are well mixed in a high speed mixing machine; the mixture is subjected to mixed extrusion under a processing temperature of 125 145 DEG C on a same direction double screw extruder; and the material is subjected to hot cut granulation, such that a finished product is obtained. Compared with a traditional thermoplastic halogen free low smoke flame retardant polyolefin cable material, the cable material provided by the invention has good oil resistance. When the cable material is soaked in mineral oil, the change rates in tensile strength and breaking elongation are low.