Magnetic recording medium and process for producing the same
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United States of America Patent
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Nov 23, 2004
Issued Date -
N/A
app pub date -
Jan 18, 2002
filing date -
Sep 10, 1999
priority date (Note) -
Expired
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Abstract
The present invention provides a magnetic recording medium having a thinned magnetic layer, excellent electromagnetic conversion characteristics and an excellent durability, and a process for producing the same. A magnetic recording medium comprising a lower non-magnetic layer containing at least a carbon black and a radiation curing type binder resin on a non-magnetic support and an upper magnetic layer having a thickness of 0.30 .mu.m or less on the lower non-magnetic layer, wherein the upper magnetic layer contains at least a ferromagnetic powder, a binder resin and an abrasive having a Mohs hardness of 6 or higher and a smaller average particle size than the thickness of the upper magnetic layer. The thickness of the upper magnetic layer is, for example, 0.05 to 0.30 .mu.m. The average particle size of the abrasive is, for example, 0.01 to 0.2 .mu.m.
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