The protective film coated on ceramic tiles is a kind of PE film. The PE in PE protective film refers to Polyethylene. It's a kind of macromolecule organic compound with the simplest structure. And it's the most widely used polymer material in the world today. PE prtective film uses specific PE plastic membrane as its basic material. Accoding to density, PE film can be classified into high-density, medium-density and low-density PE film. The biggest advantage of PE film is that it can protect the product from pollution, corrosion and scratching throughout the whole process from production, processing, transpotation, storage to end use. It keeps the product clean and glossy which means to improve the quality and market competitiveness of the product.