PRODUCTION OF MAGNETIC RECORDING MEDIUM

PURPOSE:To improve the corrosion resistant stability of magnetic metallic powder during surface working by using a nonaq. soln. and solvent as a working fluid for surface working of the coated film of a magnetic recording medium and executing the working in an inert gaseous atmosphere. CONSTITUTION:...

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Bibliographische Detailangaben
Hauptverfasser:	NAGASHIRO KAZUICHI, KANDA SATOSHI, HACHIMORI SHIGEO, INOMATA YOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	COMBINED OPERATIONS DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MACHINE TOOLS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS POLISHING TRANSPORTING UNIVERSAL MACHINE TOOLS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the corrosion resistant stability of magnetic metallic powder during surface working by using a nonaq. soln. and solvent as a working fluid for surface working of the coated film of a magnetic recording medium and executing the working in an inert gaseous atmosphere. CONSTITUTION:The replacement of the air around the magnetic recording medium for which the magnetic metallic powder is used with an inert gas to prevent the contact of the coated film with oxygen is extremely effective for the corrosion resistant stability of the magnetic metallic powder at the time of the surface working of the coated film. On the other hand, water molecules have a large electric polarity which plays the role of assisting the oxidation of material. The use of the nonaq. soln. or nonaq. solvent as the working liquid and cleaning liquid is extremely effective for the corrosion resistant stability of the coated film. The corrosion resistant stability is remarkably improved by using the nonaq. working fluid and executing the surface working of the coated film in the inert gaseous atmosphere in the above-mentioned manner.