Magnetic recording substance

Details Magnetic recording substance Magnetic recording substance

1977-02-24

1979-01-16

McCamish, Marion E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427128, 427129, 427130, 427131, 427132, 428173, 428331, 428409, 428446, 428539, 428900, 360134, B32B 516

Patent

active

041350316

ABSTRACT:
In a magnetic recording substance comprising a magnetic recording layer on one side of a non-magnetic support and a back layer on the other side thereof, the back layer is provided by coating a powdered solid with a binder and coating solvent and having spike grains with a height of 0.8 to 5 microns and an interval or pitch of at least 200 microns on the surface thereof and a friction coefficient of at least 0.25.

REFERENCES:
patent: 3734772 (1973-05-01), Schaell
patent: 3995089 (1976-11-01), Hartmann et al.

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