Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1996-03-25

1999-05-25

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428216, 428323, 428336, 428 653, 428694BS, 428694SG, 428900, 427130, G11B 5708

Patent

active

059068850

ABSTRACT:
A magnetic recording medium includes a flexible substrate, a coating layer formed on the flexible substrate, and a magnetic layer formed on the coating layer. The coating layer contains a binder and nonmagnetic particles and has a thickness in the range of 0.05 to 0.7 .mu.m as a result of a stretching treatment performed at least once after application of the coating layer on the flexible substrate. The magnetic layer contains magnetic powder, a binder and an abrasive and has a thickness in the range of 0.05 to 1.0 .mu.m. The nonmagnetic particles contained in the coating layer has an average particle size in the range of 0.01 to 0.08 .mu.m. The abrasive contained in the magnetic layer has an average particle size in the range of 0.05 to 0.8 .mu.m and satisfies conditions defined by the following equations (1) and (2):

REFERENCES:
patent: 4233352 (1980-11-01), Ono et al.
patent: 5268420 (1993-12-01), Nishimura et al.
patent: 5458964 (1995-10-01), Okazaki et al.
patent: 5549955 (1996-08-01), Kawamata et al.

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