▎ 摘　　要

NOVELTY - Polypropylene-based thermoplastic cable shielding material comprises 100 pts. wt. ethylene propylene block copolymer polypropylene, 3-20 pts. wt. conductive carbon black, 0.5-1.5 pts. wt. highly conductive graphene, 0.5-1.5 pts. wt. coupling agent and 1.4-4.5 pts. wt. additive, where the additive comprises antioxidant, lubricant and anti-caking agent, and the amount of ethylene segments in the ethylene-propylene block copolymer polypropylene is 5-30 %mass. USE - As polypropylene-based thermoplastic cable shielding material. ADVANTAGE - The polypropylene-based thermoplastic cable shielding material improves conductivity, reduces mechanical performance, and has excellent electrical conductivity and mechanical property under high temperature conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the polypropylene-based thermoplastic cable shielding material, which involves (i) uniformly mixing the conductive carbon black, the highly conductive graphene and the coupling agent to obtain a conductive mixture, (ii) melt blending the ethylene-propylene block copolymer polypropylene, conductive mixture, antioxidant, lubricant and anti-caking agent at 180-210 degrees C, performing water-cooled pelletizing, drying and dehydrating to obtain a polypropylene-based thermoplastic, and (iii) heat-treating the polypropylene-based thermoplastic material obtained in step (ii) at 120-140 degrees C for 2-6 hours to obtain the polypropylene-based thermoplastic cable shielding material.