公开(公告)号：DE2460941A1

公开(公告)日：1975-07-03

申请号：DE2460941

申请日：1974-12-21

Applicant: TORAY INDUSTRIES

Inventor： ASAKURA TOSHIYUKI ,  ITOGA MASAAKI ,  OTSU SHIGA ,  HAYAKAWA TAKESHI ,  TANIMURA MASAMITU

IPC: B29C71/00 ,  B29C49/00 ,  B29C55/00 ,  B29C55/12 ,  B29C61/00 ,  B29C71/02 ,  B29D7/01 ,  C08G69/46 ,  C08J5/18 ,  G11B5/73

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/cm3 at 25 DEG C and 0% relative humidity, and a tensile modulus higher than about 800 kg/mm2 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.