Patent ID: 7368188
Filing Date: 2008-05-06
Classification: G11B,Y10T

Abstract:
1. A magnetic recording medium comprising: a polymer support; and at least one magnetic layer containing a binder and one of a ferromagnetic metal powder having an average major-axis length of from 20 to 100 nm and a ferromagnetic hexagonal ferrite powder having an average tabular diameter of from 5 to 40 nm, wherein the polymer support has an intrinsic viscosity of from 0.47 to 0.51 dL/g, a Young's modulus in a machine direction of from 7.0 to 8.6 GPa, a Young's modulus in a transverse direction of from 5.4 to 8.0 GPa, and a breaking strength in the transverse direction of from 370 to 450 MPa.