Patent ID: 6274227
Filing Date: 2001-08-14
Classification: C08G,C08L,G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising a nonmagnetic substrate, a porous, liquid subricant-containing coating layer formed on the substrate, and a magnetic layer formed directly on the coating layer, wherein the coating layer comprises a liquid lubricant, a binder, and a nonmagnetic powder, the maximum amount of liquid lubircant that can be absorbed by a layer per unit volume of the layer is defined by U for the coating layer and M for the magnetic layer, wherein 0.75.ltoreq.M/U.ltoreq.1.25, and the lubricant is present in an amount of from 5 to 11 parts by weight per 100 parts by weight of the nonmagnetic powder, and wherein the magnetic recording medium is a disk shape having a diameter of about 89 mm.