| 摘要 |
<p>A magnetic recording tape, in particular a VTR tape, comprising; (A) a substrate composed of a biaxially oriented polyethylene-2,6-naphthalate film of which (a) the Young' modulus in the longitudinal direction is at least 650 kg/mm<2>, the Young' modulus in a transverse direction is the same as, or greater than, the Young's modulus in the longitudinal direction, (b) the heat shrinkage in the transverse direction is in the range of 1.0 to 3.0 % when treated at 100 DEG C for 30 minutes, (c) the surface roughness, Ra, is not more than 0.005 mu m, and (d) the amount of bled-out oligomer is not more than 0.01 area% when treated in air at 160 DEG C for 5 minutes, (B) a thin magnetic metal layer formed on one surface of the substrate, and (C) a lubricant-containing thin organic polymer layer formed on the other surface of the substrate. This magnetic recording tape has high coercive force and excellent running durability and is capable of recording data at high density and high sensitivity for a long period of time. c</p> |
