MAGNETIC RECORDING MEDIUM

PURPOSE:To obtain a magnetic recording medium excellent in output characteristics in which high density recording is possible by using a magnetic film body having specified solvent resistance for a supporting body. CONSTITUTION:This magnetic recording medium consists of a magnetic supporting body 1,...

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Bibliographic Details
Main Authors ISHIKAWA AKIRA, YAMASHITA KAZUTAKA, NAKAYAMA HIDEHIKO
Format Patent
LanguageEnglish
Published 27.02.1996
Edition6
Subjects
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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Summary:PURPOSE:To obtain a magnetic recording medium excellent in output characteristics in which high density recording is possible by using a magnetic film body having specified solvent resistance for a supporting body. CONSTITUTION:This magnetic recording medium consists of a magnetic supporting body 1, nonmagnetic layer 2 and magnetic layer 3, and if necessary, back a coating layer 4 is formed on the back surface of the supporting body 1. The supporting body 1 consists of a nonmagnetic part (B) and a magnetic film body (A) containing a magnetic powder formed on the nonmagnetic part (B). As for the nonmagnetic part (B), a thermoplastic resin is preferably used and polyethylene terephthalate or the like is used. Further, various kinds of fillers are preferably added considering the surface property and travelling property. As for the magnetic film body (A), a coating material comprising a setting-type resin, magnetic powder and solvent or comprising a magnetic powder and water-soluble resin is used. The extraction rate and swelling rate of the magnetic film body (when the magnetic supporting body is dipped in a solvent used for a nonmagnetic coating material at 20 deg.C for 5min) are specified to satisfy the relation (lextraction rate¦+¦swelling rate¦)X100<=3.
Bibliography:Application Number: JP19940188662