▎ 摘　　要

NOVELTY - Preparing shielding materials involves 100-150 pts. wt. ethylene-vinyl acetate copolymer resin, 18-34 pts. wt. low density polyethylene, 5-12 pts. wt. EPDM rubber, 3-8 pts. wt. dioctyl terephthalate, 3-6 pts. wt. lubricant, 3.5-6.4 ps. wt. graphene modified MQ resin, 10-26 pts. wt. carbon black, 1-5 pts. wt. fumed silica, 0.1-0.5 pts. wt. antioxidant and 0.2-0.7 pts. wt. crosslinking agent, adding to torque rheometer, controlling the temperature at 120-150 degrees C, mixing for 10-25 mintes, where the mixing speed is 50-100 r/minutes, placing the obtained material into the plate vulcanizing agent, controlling the temperature at 110-130 degrees C, pressing under the pressure of 4-8 megaPascal. The sheet is processed for 5-10 minutes, and after completion. USE - Method for preparing shielding materials used for high-voltage cables. ADVANTAGE - The method enables to prepare shielding materials has excellent performance, promotes formation of conductive path, improves electrical performance of the shielding material, service life and safety of the cable, cable shielding material to reach the expected electrical and mechanical properties, reduces adding amount of conductive filler, surface roughness, and damage to the cable insulating layer caused by the stress concentration caused by the shielding material surface rough conductor. DETAILED DESCRIPTION - Preparing shielding materials involves 100-150 pts. wt. ethylene-vinyl acetate copolymer resin, 18-34 pts. wt. low density polyethylene, 5-12 pts. wt. EPDM rubber, 3-8 pts. wt. dioctyl terephthalate, 3-6 pts. wt. lubricant, 3.5-6.4 ps. wt. graphene modified MQ resin, 10-26 pts. wt. carbon black, 1-5 pts. wt. fumed silica, 0.1-0.5 pts. wt. antioxidant and 0.2-0.7 pts. wt. crosslinking agent, adding to torque rheometer, controlling the temperature at 120-150 degrees C, mixing for 10-25 mintes, where the mixing speed is 50-100 r/minutes, placing the obtained material into the plate vulcanizing agent, controlling the temperature at 110-130 degrees C, pressing under the pressure of 4-8 megaPascal. The sheet is processed for 5-10 minutes, and after completion, cold pressed at a pressure of 5-10 megaPascal for 20-60 minutes to obtain the aforementioned shielding material for high-voltage cables. The graphene modified MQ resin is prepared by copolymerization of graphene grafted with allyl silane, vinyl triethoxy silane, and linoleamide.