Stock material or miscellaneous articles – Composite – Of polyamide
Patent
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.
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patent: 3751546 (1973-08-01), Haroldt
patent: 3767756 (1973-10-01), Blades
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patent: 3817941 (1974-06-01), Blair et al.
patent: 3881046 (1975-04-01), Akashi et al.
patent: 3967025 (1976-06-01), Tanabe et al.
Asakura Toshiyuki
Hayakawa Takeshi
Itoga Masaaki
Tanimura Masamitsu
Silverman Stanley S.
Toray Industries Inc.
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