The silicone PET protective film in the profile protection film is based on a plastic film or aluminum-plastic composite material, etc., and is coated on one side with a low-viscosity pressure-sensitive adhesive. Sticking to the surface of the profile can effectively prevent the surface of the profile from being scratched or contaminated during extrusion molding, transportation, window formation, and installation. Its appearance has brought great convenience to profile production, door and window assembly, and building construction units. Since the profile protection film is a relatively new product, there is no national or industry standard yet. There is no uniform technical index for the detection and evaluation of product quality. This brings certain difficulties to users when choosing to use a protective film.