Magnetic recording medium

摘要

The present invention provides a thin multilayer magnetic recording medium having improved electromagnetic conversion property and durability, comprising coating layers of a lower non-magnetic layer and an upper magnetic layer. The non-magnetic layer of this magnetic recording medium comprises a non-magnetic needle body having an average major axis length of 0.25 to 1.0 mu m and an average minor axis length of 0.005 to 0.0151 mu m, a first binding resin having a glass transition temperature (Tg1) of 30 to 50 DEG C., and fatty acid ester. The content of the first binding resin is 15 to 30 wt % with respect to the non-magnetic needle body. The content of the fatty acid ester is 2 to 15 wt % with respect to the first binding resin. The magnetic layer having a dry thickness of 0.5 mu m or less comprises ferromagnetic powder and a second binding resin having a glass transition temperature (Tg2) of 40 to 70 DEG C. Tg1 is at least 5 DEG C. lower than Tg2, and the entire thickness comprising the layers and the film is 12 mu m or less.