Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1988-12-22

1992-01-28

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427131, 428329, 428408, 4284259, 428694, 428900, G11B 2300

Patent

active

050843362

ABSTRACT:
The method of improving a magnetic recording medium having a support, provided thereon a magnetic layer, and provided on an another side of the support a back coating layer, is disclosed. The improvement comprises the back coating layer containing a binder and a non-magnetic powder comprising essentially of a combination of carbon black and a non-magnetic particle selected from the group consisting of zinc oxide, titanium oxide, barium sulfate, ferric oxide and calcium carbonate.

REFERENCES:
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patent: 4555443 (1985-11-01), Kikagawa et al.
patent: 4612235 (1986-09-01), Ushimaru et al.
patent: 4634633 (1987-01-01), Ninomiya et al.
patent: 4686139 (1987-08-01), Ryoke et al.
patent: 4734325 (1988-03-01), Ryoke et al.
patent: 4871606 (1989-10-01), Matsuura et al.
Patent Abstracts of Japan, vol. 10, No. 195 (p. 475)(2251) 7/9/86, p. 127 P 475; JPA-61-39227.
Patent Abstracts of Japan, vol. 10, No. 195 (p. 475)(2251) 7/9/86, p. 126 p475; JPA-61-39224.
Patent Abstracts of Japan, vol. 10, No. 74 (p. 439)(2131) 3/25/86, pp. 20,21 P 439; JPA-60-211623.

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