Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1998-02-26

2000-04-25

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428329, 428694BS, 428900, G11B 5738

Patent

active

060542012

ABSTRACT:
The present invention relates to a magnetic recording medium comprising: a non-magnetic substrate; a non-magnetic undercoat layer formed on said non-magnetic substrate, said undercoat layer comprising non-magnetic acicular hematite particles containing 0.05 to 50% by weight of aluminum uniformly within the particles, calculated as Al, based on the total weight of the non-magnetic particles and a binder resin,; and a magnetic recording layer formed on said non-magnetic undercoat layer, said magnetic recording layer comprising magnetic particles containing iron as a main ingredient and a binder resin. The magnetic recording medium has small light transmittance, smooth surface, high strength and high durability.

REFERENCES:
patent: 4082905 (1978-04-01), Stephan et al.
patent: 4840677 (1989-06-01), Ostertag
patent: 4898619 (1990-02-01), Clifford et al.
patent: 5587232 (1996-12-01), Hayashi et al.
patent: 5604015 (1997-02-01), Hayashi et al.
patent: 5750250 (1998-05-01), Hayashi et al.

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