Toray Industries, Inc.

Nobuaki Itoh

Hiroaki Kobayashi

Masanori Sueoka

Toshihiro Tsuzuki

Toshiyuki Asakura

Masanori Mizouchi

An aromatic polyamide and/or aromatic polyimide film suitable as a support in a magnetic recording medium excellent in runnability and scratch resistance and good in S/N ratio comprises an aromatic polyamide and/or aromatic polyimide as a main component, with particles present in the film, which film has characteristics which satisfy the following formulae:

Aromatic polyamide and/or aromatic polyimide film and magnetic recording

Image transfer material for thermal recording

Disclosed is a magnetic recording medium which comprises a film of an aromatic polyamide having at least 50 mole % of recurring units represented by the following general formula: ##STR1## wherein m and n are integers of from 0 to 4, with the proviso that the case where both of m and n are 0 is excluded, and at least one high performance magnetic layer of a metal or metal compound vacuum-deposited on the aromatic polyamide film. This magnetic recording medium shows a reduced dimensional change and is substantially free of curling or breakage due to elongation, and is excellent in flatness and adhesive strength between the base film and the magnetic layer. Accordingly, this magnetic recording medium is suitable for high-density magnetic recording.

Magnetic recording medium

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Otsu, Japan

Nobuaki Itoh