▎ 摘　　要

NOVELTY - Creep-resistant cold shrink cable intermediate joint material comprises a dielectric layer coating a core layer, where the core layer is a graphene-filled silicone rubber material, the dielectric layer is a polyethylene film crosslinked by UV and the two are prepared by stretching and compounding to obtain the joint material. USE - As creep-resistant cold shrink cable intermediate joint material. ADVANTAGE - The joint material can significantly improve the creep resistance of the silicone rubber after filling graphene in the silicone rubber, maintains original elasticity and mechanical properties, has improved insulation and dielectric properties and excellent creep resistance and is suitable for preparation and application requirements of the elastomer in the cold shrinkable cable joint. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for making the joint material involving (i) adding polyethylene granules to a film blowing machine to blow out a polyethylene film, (ii) immersing the polyethylene film in a crosslinking solution containing a photosensitizer for impregnation, exporting wound on a winding cylinder, sealing and placing in a constant temperature oven at 40 degrees C for constant temperature impregnation, where the crosslinking solution impregnation time is 1 hour, (iii) gradually unwinding the impregnated polyethylene film from the winding cylinder, performing UV irradiation crosslinking in an UV irradiation box under the protection of nitrogen atmosphere, where the irradiation time is 30 minutes and obtaining a polyethylene bag by cooling and pressing, (iv) firstly dispersing graphene and vinyl silicone oil in a n-hexane solvent, performing ultrasonic treatment for 30 minutes, evaporating a solvent and cooling to room temperature, adding a hydrogen-containing silicone oil and a platinum catalyst and stirring at 500 rpm for 10 minutes to obtain a silicone rubber filling solution and (v) filling the silicone rubber filling solution into the polyethylene bag, vacuumizing and foaming at room temperature and carrying out plastic packaging, curing at 70 degrees C for 1 hour and laminating at 120 degrees C using double-roller to obtain the joint material.