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Patent Searching and Data


Title:
MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH1064045
Kind Code:
A
Abstract:

To provide a magnetic recording medium prevented from being powdered at the time of sliding the magnetic recording medium with a fixed guide or the like, reduced in dropout and improved in durability.

A lubricant layer 3 consisting of a fatty acid, which has the molecular weight of ≥150 to ≤350 and has the contents of ≥0.5mg/m2 to ≤2mg/m2 on the opposite side surface, and a fatty acid ester, which has the molecular weight of ≥200 to ≤600 and has the cobtents of ≥0.4mg/m2 to ≤4mg/m2 on the opposite side surface, is formed on the opposite side surface to the surface of a non-magnetic supporting body 1 on which a magnetic layer 2 is formed. A process for obtaining a magnetic coating material by kneading the fatty acid and the fatty acid ester with a magnetic material and a process for forming the magnetic layer 2 by applying the magnetic coating material on the non-magnetic supporting body 1 and drying are provided. As a result, the magnetic recording medium prevented from being powdered at the time of sliding with the fixed guide or the like, reduced in dropout and improved in durability is obtained.


Inventors:
KUMAGAI AKIYOSHI
Application Number:
JP21558396A
Publication Date:
March 06, 1998
Filing Date:
August 15, 1996
Export Citation:
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Assignee:
SONY CORP
International Classes:
C10M105/24; C10M105/34; G11B5/71; G11B5/735; G11B5/842; C10N20/04; C10N40/18; (IPC1-7): G11B5/71; C10M105/24; C10M105/34; G11B5/842