MAGNETIC RECORDING MEDIUM

PURPOSE:To obtain a magnetic recording medium for a VTR, etc. having improved skew and wear resistance by coating a magnetic layer contg. polyisocyanate and having a moisture content at a specific value or above on a substrate having a thermal shrinkage rate in a longitudinal direction at a specific...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HASHIMOTO HIROSHI, OKITA TSUTOMU, HIBINO NOBUROU, YAMADA YASUYUKI, MUKOUDA YOSHIHITO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a magnetic recording medium for a VTR, etc. having improved skew and wear resistance by coating a magnetic layer contg. polyisocyanate and having a moisture content at a specific value or above on a substrate having a thermal shrinkage rate in a longitudinal direction at a specific value or above then subjecting the same to a heat treatment. CONSTITUTION:A coating liquid which is prepd. by dispersing magnetic powder in a mixture contg. a vinyl chloride-vinyl acetate-maleic acid copolymer or the like or nitrocellulose as a main binder and contg. polyurethane and polyisocyanate and is controlled to contain >=0.35% moisture to permit easy curing reaction is coated on the surface of a non-magnetic substrate of polyester, fibrous polymer, etc., of which the thermal shrinkage rate in the longitudinal direction is