BIAXIALLY ORIENTED PENBB FILM FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIA MADE THEREWITH

摘要

Disclosed herein is a biaxially oriented PENBB film having a surface modified to produce improved slip and/or improved adhesion to magnetic coatings. The surface modification includes particles, a continuous or discontinuous coating, or a combination thereof. In the PENBB of the invention the dicarboxylic acid derived repeating units include 25 mole percent or more of units derived from 4,4'-bibenzoic acid.