Patent ID: 7524920
Filing Date: 2009-04-28
Classification: C08J,C09K,H05K,Y10T

Abstract:
1. A biaxially-oriented polyester film produced from a polyester comprising: (a) diacid residues comprising between about 95 and about 100 mole percent of terephthalic acid residues; (b) diol residues comprising between about 95 and about 100 mole percent of 1,4-cyclohexanedimethanol residues; and (c) about 0.5 to about 5 mole percent of another dicarboxylic acid or diol residue, wherein the polyester comprises a total of 100 mole percent diacid residues and a total of 100 mole percent diol residues, and wherein the polyester film has been heat set at an actual film temperature of from 260° C. to Tm, where Tm is the melting point of the polyester as measured by differential scanning calorimetry (DSC), and has a thickness of 70 to 150 microns.