| 摘要 |
PURPOSE:To elevate a running property, resistace to wear and an electromagnetic converting characteristic, by providing a thin film of aromatic polysulfone resin on a magnetic metallic thin film or the reverse side of a supporting body. CONSTITUTION:On a supporting body of a polyethylene terephthalate film, etc., a ferromagnetic metallic thin film consisting of iron, cobalt, nickel, etc. is provided by a vacuum metallizing method or other method. Also, on both or one of the reverse sides of said ferromagnetic metallic thin film and the supporting body, a thin film layer of aromatic polysulphone resin being a monomer or a copolymer having a repeating unit as shown in the expression is provided. |
