Patent ID: 6129979
Filing Date: 2000-10-10
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium-comprising a support of aromatic polyamide, a magnetic recording layer which comprises a ferromagnetic powder and a binder and which is arranged on one surface side of the support, and a back-coating layer which is arranged on the other surface side of the support, whereinthe back-coating layer comprises solid particles and a binder in a particle to binder weight ratio of from 8/10 to 20/10, in terms of the former/latter, anda subbing layer which comprises polyester resin or polyurethane resin having a glass transition temperature of 40.degree. C. to 80.degree. C. and at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM and --OPO.sub.3 MM.sup.1 in which each of M and M.sup.1 independently is a hydrogen atom, an alkaline metal ion or an ammonium ion, is arranged between the support and the back-coating layer.