| 摘要 |
PURPOSE:To get rid of generation of curl, and also to elevate running stability, by providing a back coating layer containing nonmagnetic powder whose Mohs hardness is <=5, in specific resin, on the reverse side of a base body on which a ferromagnetic metallic thin film layer has been formed by means of vapor deposition. CONSTITUTION:On the reverse side of the base of a polyester film, etc. having on the surface a ferromagnetic metallic thin film layer formed by means of vapor-deposition of cobalt, etc., a layer consisting of at least one resin selected from an acrylonitrile-butadiene-styrene copolymer, polystyrene resin, acrylic resin, vinyl chloride-vinyl acetate copolymer, polyvinyl acetal resin, and cellulose resin, and nonmagnetic powder whose Mohs hardness is <=5, such as CaCO3 powder, Mg-O powder, BaCO3 powder, ZnO powder, Cu2O powder, CuO powder, MoS2 powder, WS2 powder, etc. is provided. |
