| abstract |
In a uniaxially oriented polyester film, the orientation direction of the film, which has been easy to become non-uniform in the past, has high optical axis stability in which the orientation direction is uniformly controlled, and the liquid crystal display Provided is a uniaxially oriented polyester film for a polarizer-supporting substrate that can prevent color shift and color spots. An orientation degree of a PET crystal (−105) plane in a film TD direction obtained by wide-angle X-ray diffraction measurement, an angle α formed between a film in-plane slow axis and a film TD direction, and a film in-plane slow axis A uniaxially oriented aromatic polyester film for a polarizer support substrate, wherein the relationship of the angle variation β formed with the film TD direction satisfies the following formulas (1) and (2). fc TD (−105) ≧ 0.35 (1) (In the formula (1), fc TD (-105) represents the degree of orientation of the PET crystals (-105) plane of the film TD direction obtained by wide-angle X-ray diffraction measurement) 0 ≦ α + β ≦ 15 ° (2) [Selection figure] None |