Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1989-11-13

1992-07-28

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428480, 428694, 428900, G11B 2300

Patent

active

051340275

ABSTRACT:
The improved magnetic recording medium having a magnetic layer on one side of a base support and a backcoat containing a binder and a carbon black on the other side is characterized in that the backcoat further contains an inorganic powder having a hardness of 3-6 on the Mohs scale, the carbon black having an average particle size of 20-100 m.mu., and the binder containing nitrocellulose having a viscosity of 1/8-1/3 second as measured by the falling-ball method.

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patent: 4686139 (1987-08-01), Ryoke et al.
patent: 4696858 (1987-09-01), Ryoke et al.
patent: 5001006 (1991-03-01), Saito et al.

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