MAGNETIC RECORDING TAPE COMPRISING A POLYESTER FILM CONTAINING A PH BASIC FILLER

The abrasion resistance of a nonmagnetic substrate of a polyester film of a magnetic recording tape can be improved without the use of a backcoating layers by adding a pH basic filler to the polyester film. The pH basic filler should exhibit a blue color when Bromothymol Blue, a basicity indicator,...

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Bibliographische Detailangaben
Hauptverfasser:	MUTA, KUNIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	The abrasion resistance of a nonmagnetic substrate of a polyester film of a magnetic recording tape can be improved without the use of a backcoating layers by adding a pH basic filler to the polyester film. The pH basic filler should exhibit a blue color when Bromothymol Blue, a basicity indicator, is adsorbed thereon.