Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-09-23

1987-03-10

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

427131, 428323, 428408, 4284231, 428694, 428695, 428900, G11B 568, G11B 578

Patent

active

046490728

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer on one side and a backing layer on the other side, wherein the backing layer contains (1) non-magnetic powders containing carbon black having an average particle diameter of from 0.1 to 1 .mu.m; (2) two or more binders wherein (a) at least one of the binders is a resin having a 100% modulus of from 15 to 150 kg/cm.sup.2 in an amount of from 50 to 95 wt % based on the total amount of the binders in the backing layer, and (b) the rest binder(s) is/are a resin other than the resin having a 100% modulus of from 15 to 150 kg/cm.sup.2, and the weight ratio of all the non-magnetic powders to all the binders in the backing layer is from 300:100 to 40:100; and (3) a polyisocyanate in an amount of from 15 to 40 wt % based on the total amount of the binders in the backing layer.

REFERENCES:
patent: 4452863 (1984-06-01), Takizawa et al.
patent: 4474843 (1984-10-01), Miyoshi et al.
patent: 4539257 (1985-09-01), Ryoke et al.
patent: 4544601 (1985-10-01), Yamaguchi et al.
patent: 4551386 (1985-11-01), Yamaguchi et al.

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