Magnetic disc

Details Magnetic disc Magnetic disc

1985-09-16

1987-05-19

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427131, 428402, 428408, 428694, 428695, 428900, G11B 568, G11B 582

Patent

active

046667695

ABSTRACT:
A magnetic disc comprising a non-magnetic substrate, an undercoat coated on the surfaces of the substrate and a magnetic layer containing magnetic powder dispersed in a binder coated on the undercoat, characterized in that the undercoat has a thickness of from 0.5 to 10.0 .mu.m and such a porosity that a lubricant is contained therein in an amount of from 30 to 200 mg/cm.sup.3, which provides good surface lubricity and improved durability.

REFERENCES:
patent: 4183976 (1980-01-01), Yamada et al.
patent: 4528240 (1985-07-01), Miyoshi et al.
patent: 4546035 (1985-10-01), Ko et al.

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