Patent ID: 7960045

Claim:
A magnetic recording medium comprising a coating layer on a nonmagnetic support, wherein the coating layer comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order, the nonmagnetic support comprises a main component in the form of a resin obtained by mixing and/or copolymerizing a polyethylene naphthalate and a polymer other than the polyethylene naphthalate, has a glass transition temperature of equal to or higher than 80° C. but less than 125° C., and has a heat absorption peak, based on enthalpy relaxation, ranging from 0.5 to 2.0 J/g, the resin having a glass transition temperature lower than the glass transition temperature of the polyethylene naphthalate, and the amount of the polyethylene naphthalate in the resin is from 60-90 wt % based on the total weight of the PEN and the other polymer.