Magnetic recording medium having an aromatic polyamide substrate

Details Magnetic recording medium having an aromatic polyamide substrate Magnetic recording medium having an aromatic polyamide substrate

1995-09-12

1997-07-08

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

4284744, 428694SL, 428694SG, 428900, G11B 5704

Patent

active

056459181

ABSTRACT:
The present invention provides a magnetic recording medium including a base film having an aromatic polyamide and a magnetic layer formed on at least one surface of the base film, such that the base film has a tensile Young's modulus in at least one direction of not less than 700 kg/mm.sup.2, a content of materials extractable with methylene chloride of not more than 0.5%, and a dimensional change in the longitudinal direction after applying a load of 1 kg per 1 mm.sup.2 at 100.degree. C. for 10 minutes of not more than 2%. The magnetic recording medium is excellent in running property and durability even under severe conditions.

REFERENCES:
patent: 4112187 (1978-09-01), Asakura et al.
patent: 4210703 (1980-07-01), Scantlin et al.
patent: 4952449 (1990-08-01), Okazaki et al.
patent: 5013823 (1991-05-01), Mizuno et al.
patent: 5051319 (1991-09-01), Kuse et al.
patent: 5143983 (1992-09-01), Yamagishi et al.

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