1.The PE protective film is inert to the surface of the protected material; 2. The protective film has good adhesion to the protected material. During the material handling and processing, the protective film will not warp or fall off; 3. The protective film It has good weather resistance and stability of sticking force. After a few days or a long time, the peeling force does not increase significantly, and it is easy to peel off. There is no residual glue left on the protected surface when removing it, and no shadow; 4. Low crystal point .