MAGNETIC RECORDING MEDIUM

PURPOSE:To increase the running performance, wear resistance and electromagnetic conversion properties of a magnetic recording medium, by providing a thin film of vinyl chloride-vinyl acetate-maleic anhydride copolymer on at least one of a magnetic metal thin film and a rear surface of a support. CO...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO NOBUYUKI, OKITA TSUTOMU, NISHIKAWA YASUROU, NARUO KIYOUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FUELS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PHYSICS TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	PURPOSE:To increase the running performance, wear resistance and electromagnetic conversion properties of a magnetic recording medium, by providing a thin film of vinyl chloride-vinyl acetate-maleic anhydride copolymer on at least one of a magnetic metal thin film and a rear surface of a support. CONSTITUTION:A magnetic metallic thin film is formed on a nonmagnetic support by vacuum deposition and sputtering methods, and an organic solvent solution of vinyl chloride-vinyl acetate-maleic anhydride copolymer is coated on at least one of a magnetic metallic thin film or a support rear surface and a thin film is formed by drying to obtain an objective magnetic recording medium. As a copolymer to be used, it is preferable for >=200 polymerization degree, and for the ratio of a copolymer, 80-95wt% vinyl chloride, 1-20wt% vinyl acetate and 1-10wt% maleic anhydride. The object of this invention can more effectively be achieved by incorporating a lubricant such as fatty acid and silicone oil into the copolymer.