Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-10-18

1987-09-29

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427131, 428694, 428900, G11B 570

Patent

active

046968580

ABSTRACT:
A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer being provided on one surface of the support and a backing layer being provided on the surface of the support opposite to said magnetic layer, the backing layer containing (A) a binder comprised of resin having a 100% modulus of 150 kg/cm.sup.2 or less present in an amount of 50 to 95 wt % based on the total weight amount of binder and (B) non-magnetic particles comprised of (i) carbon black having an average particle size of more than 0.1 .mu.m to 1.0 .mu.m, and (ii) carbon black having an average particle size of 0.01 .mu.m to 0.1 .mu.m in a weight ratio of carbon black (i)/carbon black (ii) of 95/5 to 5/95, with the non-magnetic particles in the backing layer being present in an amount of 40 to 300 parts by weight per 100 parts by weight of the total binder.

REFERENCES:
patent: 4135031 (1979-01-01), Akashi et al.
patent: 4474843 (1984-10-01), Miyoshi et al.
patent: 4546038 (1985-10-01), Yamaguchi et al.
patent: 4582757 (1986-04-01), Miyoshi et al.
patent: 4598014 (1986-07-01), Miyoshi et al.

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