Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1996-09-25

1997-12-16

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 654, 428336, 428402, 428694B, 428694BN, 428694BS, 428900, G11B 566, G11B 570, B32B 302

Patent

active

056982860

ABSTRACT:
A magnetic layer is provided on a nonmagnetic base with a non-ferromagnetic layer interposed between them. Non-ferromagnetic particulate iron oxide is incorporated in the non-ferromagnetic layer. In addition to, or in place of, this iron oxide, non-structural carbon having a mean particle diameter of 10 to 60 nm, a specific surface area of 150 m2/g as measured by the BET method and a DBP oil absorption of 100 ml/100 g or less may be used. This makes it possible to achieve a magnetic recording medium having excellent surface properties and good-enough electromagnetic transducing characteristics.

REFERENCES:
patent: 4963433 (1990-10-01), Ogawa et al.
patent: 5258223 (1993-11-01), Inaba et al.
patent: 5324582 (1994-06-01), Goto et al.
patent: 5336559 (1994-08-01), Yamagishi et al.
patent: 5354610 (1994-10-01), Ozawa et al.
Database WPI, Derwent Publications, AN-92 335020, JP-A-04 238 111, Aug. 26, 1992.
Database WPI, Derwent Publications, AN-92 203067, JP-A-04 117 618, Apr. 17, 1992.

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