Sheet protective film is based on PE polyethylene film, coated with silicone glue on one side and fitted to the release film. Features: 1) Such products have suitable bonding strength for various pasted objects such as metal, plastic, glass, etc., and have good holding force performance; 2) The surface of the protective film is smooth and flat; 3) Excellent heat resistance; The application field: 1) Die-cutting protection and re-pasting of conductive cloth; 2) Protection of the shipping surface; 3) Temporary transfer and fixation of electronic products; 4) The protective film has different viscosity, and can be used as a support carrier for foam die-cutting of different thicknesses; 5)The viscosity is divided into high, medium and low viscosity.