| 摘要 |
PURPOSE:To improve durability and corrosion resistance by depositing titanate by vacuum evaporation on the surface of a thin ferromagnetic metallic film layer, then hydrolyzing the same in the atm. to provide a dense and tough protective film layer consisting of titanium dioxide which has network structure and is grown to macromolecules. CONSTITUTION:The thin ferromagnetic metallic film layer 2 consisting of cobalt is formed on a polyester film 1 and, for example, isopropyl titanate is deposited by vacuum evaporation on the thin film layer 2 and is exposed to an atmosphere of 40 deg.C and 80% RH to hydrolyze the isopropyl titanate, by which the protective film layer 3 consisting of titanium dioxide is formed. The titanate induces hydrolysis quickly when exposed to water or wet air. The titanate condenses simultaneously and grows to macromolecules to form the titanium dioxide having the network structure. The protective film layer 3 consisting of the formed titanium dioxide has the extremely good adhesiveness to the layer 2 and is further dense so that said layer has a water repelling effect. The protective film layer is thereby securely deposited on the layer 2, by which the durability and corrosion resistance of the medium are greatly improved.
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