BIAXIALLY ORIENTED THERMOPLASTIC RESIN FILM

摘要

PURPOSE:To obtain the title film improved in abrasion resistance by mixing a thermoplastic resin with specified linked particles, forming the mixture into a film and biaxially orienting this film. CONSTITUTION:A thermoplastic resin (e.g. polyethylene terephthalate) is mixed with 0.005-5wt.% linked particles having a mean particle diameter of the primary particle of 1-400nm and a linking coefficient of 3-200 and desirably having a degree of branching of 1-50 and Mohs hardness of 5-10 and optionally a dispersant and 0.005-0.5wt.% inert particles, and the mixture is formed into a film to obtain an unoriented film. This film is biaxially oriented to obtain the title film having an average surface roughness of 0.003-0.060mum on at least either surface.