Magnetic recording members

Details Magnetic recording members Magnetic recording members

1976-04-12

1978-05-23

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

360134, 427131, 428329, 428336, 428900, B32B 702, G11B 574

Patent

active

040911586

ABSTRACT:
A magnetic recording member comprising a non-magnetic support and two or more magnetic layers provided on the non-magnetic support and composed mainly of a ferromagnetic fine powder and a binder. The upper layer of the magnetic layers has a dry thickness of about 0.3 to about 2.5 .mu.m and the ferromagnetic fine powder contained in the upper layer is ferromagnetic iron oxide having an APP value of not more than about 1.0 and a coercive force of about 300 to about 500 Oe.

REFERENCES:
patent: 2643130 (1953-06-01), Kornei
patent: 2941901 (1960-06-01), Prill et al.
patent: 3676217 (1972-07-01), Akashi et al.
patent: 3761311 (1973-09-01), Perrington et al.
patent: 3775178 (1973-11-01), Perrington et al.

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