Novel PET protective film and preparation method thereof

The invention belongs to the technical field of polymer composite materials, particularly relates to a novel PET protective film and a preparation method thereof, and solves the problems that the edge of a PET protective film in the prior art is easy to retract and curl in a high-temperature environment; in addition, the method also solves the problem that after the PET protective film is subjected to high-temperature hardening treatment,due to the fact that colored stripes are easily formed on the surface of the protective film, the comprehensive use performance of the PET protective film is influenced, and the like. The novel PET protective film comprises the following raw materials in parts by weight: 50-70 parts of polyethylene glycol terephthalate, 30-40 parts of urethane acrylate, 100-120 parts of a composite solvent, 4-5 parts of superfine aluminum silicate, 16-35 parts of modified graphene and 3-5 parts of a dispersing agent. The preparation method is simple, the preparation condition is mild, a high-