▎ 摘　　要

NOVELTY - Polyolefin heat-shrinkable film high performance film comprises intermediate layer and a surface layer located on both sides of the intermediate layer. The intermediate layer comprises linear low density polyethylene resin and first functional filler. The surface layer comprises a polypropylene resin and a second functional filler. The first functional filler is graphene oxide, and the radiotherapy of the graphene oxide is 10-20 m, and the second functional filler is spherical alumina, and the D50 of the spherical alumina is 200-220 nm. The consumption of graphene oxide is 10-15%, and the dosage of the spherical alumina is 8-12%. USE - Used as polyolefin heat-shrinkable film high performance film. ADVANTAGE - The film is prepared by simple method and has excellent thermal conductivity, heat conductivity and thermal stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the film, comprising mixing graphene oxide and linear low density polyethylene resin to provide linear low density polyethylene resin comprising graphene oxide, mixing the spherical alumina and polypropylene resin to provide a polypropylene resin comprising spherical alumina, melting and plasticizing the linear low density polyethylene resin and polypropylene resin into a conical surface overlapping head by an extruder, cooling and shaping by a shaping device to form a first film tube, stretching and blowing the first film tube to form a second film bubble, and entering the winding device to roll into a film.