Highly running-endurant magnetic recording medium

Details Highly running-endurant magnetic recording medium Highly running-endurant magnetic recording medium

1987-12-02

1989-04-04

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428402, 428408, 428694, 428695, 428900, G11B 570, G11B 5706, G11B 5708

Patent

active

048186066

ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support having thereon a magnetic recording layer comprising a magnetic layer containing ferromagnetic metal powder wherein the magnetic metal powder has a BET specific surface area of not less than 40 m.sup.2 /g and the magnetic recording layer contains a fatty acid having a neutralization value of not more than 250, an ester of fatty acid and a carbon black having a DBP oil absorption of not less than 110 ml/100 g and an average particle size of not more than 60 m.mu.. The magnetic recording medium is improved on the electromagnetic conversion property as well as on the running endurance.

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patent: 4562117 (1985-12-01), Kikukawa
patent: 4626469 (1986-12-01), Yamaguchi
patent: 4629646 (1986-12-01), Ide
patent: 4647503 (1987-03-01), Yamaguchi
patent: 4654258 (1987-03-01), Kawamata
patent: 4696859 (1987-09-01), Miyoshi

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