| abstract |
A biaxially oriented polyester film useful for the production of magnetic recording media excellent in travelling and electromagnetic transduction characteristics, particularly, metallic thin-film magnetic recording media, said film being composed of (1) a biaxially oriented base film made from an aromatic polyester produced by using an organotitanium compound as the polymerization catalyst, (2) a first continuous thin film which is provided on one surface of the base film and on which a magnetic recording layer is formed, and (3) a second continuous thin film which is provided on the other surface of the base film to form a slippery face. |