Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-10-24

1987-07-07

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427128, 427131, 428328, 428330, 428694, 428695, 428900, 428336, G11B 572

Patent

active

046787062

ABSTRACT:
A magnetic recording medium is described, comprising a non-magnetic support, a magnetic recording layer on one side of the support, and a backing layer on the opposite side of the support to the magnetic recording layer, wherein said backing layer comprising a binder and a powder dispersed in the binder, wherein the powder is a powdered oxide represented by the formula M.sup.1.M.sup.2.O.sub.2+x (wherein M.sup.1 is at least one element selected from the group consisting of Ba, Sr, Pb and Ca, M.sup.2 is at least one element selected from the group consisting of Ti, Zr and Sn, and x is in the range of from 0 to 0.9) or a mixture of said powdered oxide and carbon black. This magnetic recording medium has a decreased coefficient of friction, is free from formation of scratches, has good durability, and furthermore, maintains good S/N characteristics.

REFERENCES:
patent: 3630910 (1971-12-01), Akashi
patent: 3833412 (1974-09-01), Akashi
patent: 4117190 (1978-09-01), Akashi
patent: 4420408 (1983-12-01), Kajimoto
patent: 4420532 (1983-12-01), Yamaguchi
patent: 4442171 (1984-04-01), Sato
patent: 4469758 (1984-09-01), Scott
patent: 4511484 (1985-04-01), Aonunuma
patent: 4584243 (1986-04-01), Kadokura

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