MAGNETIC RECORDING MEDIUM

PURPOSE:To increase the running performance, wear resistance and electromagnetic conversion properties, by providing a thin film of polyvinylbutyral on at least either one of a magnetic metal thin film and a rear surface of a support, in a metallic thin film type magnetic recording medium. CONSTITUT...

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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, by providing a thin film of polyvinylbutyral on at least either one of a magnetic metal thin film and a rear surface of a support, in a metallic thin film type magnetic recording medium. CONSTITUTION:A magnetic metal thin film is formed on a nonmagnetic support by vacuum deposition and sputtering methods. The thin film of polyvinyl butyral is formed on at least one of the magnetic metal thin film and a rear surface of a support with the magnetic metal thin film to form the objective magnetic recording medium by coating an organic solvent solution of the polyvinylbutyral and drying it. The polymerization degree of the polyvinylbutyral to be used is preferably 200-1,500, and the degree of butyral is preferably 55-75mol%. Further, the object of this invention can more effectively be achieved by incorporating a lubricant such as fatty acid and higher alcohol to the polyvinylbutyral.