Patent ID: 9212268
Filing Date: 2015-12-15
Classification: B29C,B29D,B29K,C08J,H01L

Abstract:
1. A biaxially oriented polyethylene terephthalate film comprising: at least polyethylene terephthalate resin and having a degree of crystallinity (Xc) of more than 0.35 and 0.50 or less, the resin that constitutes the film having an intrinsic viscosity (IV) of 0.66 to 1.0 dl/g, and the film having a coefficient of thermal expansion of 0 to 29 ppm/° C. in a temperature range of 50° C. to 170° C. in both the film's machine direction and transverse direction and a degree of thermal shrinkage of −0.5% to 1.0% at 180° C. in both the film's machine direction and transverse direction.