Magnetic recording medium and process for producing the same

Details Magnetic recording medium and process for producing the same Magnetic recording medium and process for producing the same

1994-09-16

1996-02-06

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of fluorinated addition polymer from unsaturated monomers

428694T, 428694TP, 428694TF, 428695, 428900, 427127, 427128, 427130, 427131, 427132, B32B 2700, G11B 566, B05D 512

Patent

active

054894808

ABSTRACT:
Disclosed is a process for producing a magnetic recording medium comprising subjecting a ferromagnetic metal thin film formed on a non-magnetic support by vacuum film formation to a high humidity treatment in an atmosphere of from 50 to 90% RH at a temperature of from 10.degree. to 50.degree. C. and then applying a lubricant having a polar group in the molecule thereof to the thus treated ferromagnetic metal thin film, and a magnetic recording medium comprising a non-magnetic support having thereon a ferromagnetic metal thin film, wherein the ferromagnetic metal thin film has provided thereon a double lubricant layer comprising (i) a lower layer comprising a polar group-containing perfluoropolyether and (ii) an upper layer comprising a perfluoropolyether having no polar group, the polar group-containing perfluoropolyether has a viscosity of from 200 to 1000 cSt at room temperature and the perfluoropolyether having no polar group has a viscosity of 50 cSt or less at room temperature.

REFERENCES:
patent: 5037710 (1991-08-01), Frew et al.
patent: 5069973 (1991-12-01), Saito et al.
patent: 5091249 (1992-02-01), Nishikawa et al.
patent: 5094897 (1992-03-01), Morita et al.

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