Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

G - Physics

11

B

117/24

G11B 5/64 (2006.01) B32B 15/08 (2006.01) G11B 5/66 (2006.01) G11B 5/73 (2006.01) H01F 10/28 (2006.01)

Patent

CA 1288011

ABSTRACT OF THE DISCLOSURE A magnetic recording medium, comprising an aromatic polyimide film and a magnetic layer of a ferromagnetic material provided on the aromatic poly- imide film. The aromatic polyimide film is prepared by imidation of a film formed from a solution of a polyamic acid solution obtained by copolymerization of an aromatic amine component comprising at least 30 mole % of p-phenylene diamine and 0 to 70 mole % of diaminodiphenylether, respectively based on the total amount of the aromatic amine component, and a tetracarboxylic acid dianhydride.

498688

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