Magnetic recording medium supported on aromatic polyamide

Details Magnetic recording medium supported on aromatic polyamide Magnetic recording medium supported on aromatic polyamide

1976-04-19

1978-09-05

Silverman, Stanley S.

Stock material or miscellaneous articles

Composite

Of polyamide

360134, 427128, 428539, 428900, H01F 1004, G11B 578

Patent

active

041121872

ABSTRACT:
An improved magnetic recording medium comprising a flexible support consisting of at least about 70 mol % of p-oriented aromatic polycarbonamide units. The polycarbonamide may include substituent groups on the aromatic nuclei. The support has a density of more than about 1.41 g/cm.sup.3 at 25.degree. C and 0% relative humidity, and a tensile modulus higher than about 800 kg/mm.sup.2 in at least one direction, combined with a thin layer of magnetically susceptible material deposited electrically or dispersed in a nonmagnetic binder. The magnetic recording medium in this invention shows excellent running performance and has superior dimensional stability both thermally and hygroscopically.

REFERENCES:
patent: 3472819 (1969-10-01), Stephens
patent: 3512930 (1970-05-01), Bottjer et al.
patent: 3652510 (1972-03-01), Blomberg
patent: 3751546 (1973-08-01), Haroldt
patent: 3767756 (1973-10-01), Blades
patent: 3796693 (1974-03-01), Morgan et al.
patent: 3817941 (1974-06-01), Blair et al.
patent: 3881046 (1975-04-01), Akashi et al.
patent: 3967025 (1976-06-01), Tanabe et al.

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