AROMATIC POLYAMIDE FILM AND MAGNETIC RECORDING MEDIUM MADE BY USING THE SAME

摘要

PURPOSE: An aromatic polyamide film and a magnetic recording medium being manufactured thereof are provided to obtain the magnetic recording medium with an excellent surface flatness by using the excellent strength and heat-resistance of the aromatic polyamide. CONSTITUTION: An aromatic polyamide film which has a thermal shrinkage in the transverse direction of 0.2 to 8 % as measured at 220°C under a load of 80 kg/cm¬2 and has a ten-point average surface roughness, Rz, of 10 to 200 nm on its side opposite to the side where a magnetic layer is to be formed; and a magnetic recording medium comprising this film and a magnetic layer formed on one side thereof. Using the film having a high-temperature thermal shrinkage and a surface property respectively within the above ranges can provide a magnetic recording medium which is reduced in curling and has excellent surface flatness.