This product is mainly used in the production process of radial tire and the essential auxiliar material for the production of radial tire.In the process of tread, tread top,tire wall and tread bracing layer for radial tire,the prefabricated rubber sheet is requied;while this soft,stiff and neat isolating fresh-keeping film is the ideal material to keep the rubber sheet fresh, for it can be fully applied to theprefabricated rubber sheet,yet easy to peel.with all performance indexes,such as textile strength,elongation at break,tearing strength,melting point,content of copper,that of manganese,acetone abstract,having met the application requirements,this product is popularepted by world major tire manufacturers.