Take polyester film (PET) as the substrate, and apply a layer of release agent (silicone, F class, etc.) or functional coating, such as antistatic agent on the surface. The protective film is based on the original film (mainly pet, supplemented by PP and PE) (the PU protective film base material is generally pet, and the TPU protective film base material is TPU film), which is coated with curing acrylic glue / silica gel /PU (polyurethane) material to form a functional protective material.
