| 摘要 |
PURPOSE:To obtain the title film excellent in mar resistance, durability, adhesion to a magnetic layer by forming a coating layer on one surface of a polyester film to which specified particles are added so as to give a specified center-line average roughness to the surface. CONSTITUTION:This film is prepared by forming a coating layer (e.g. water- dispersible thermoplastic polyester) on one surface of a polyester (e.g. polyethylene terephthalate) film to which 0.05-5wt.% particles (e.g. Al2O3) of a Mohs hardness >=8 and a mean particle diameter of 0.01-5mum are added so as to give a center-line average roughness of 0.005-0.040mum to the surface. |
