| abstract |
The present invention relates to a uniaxially oriented polyester film, which has a high degree of optical axis stability in which the orientation direction is uniformly controlled at both ends of the film, where the orientation direction of the film has been apt to be non-uniform. Even when used as a supporting substrate, it is possible to prevent color shift and color spots of a liquid crystal display, and provide a film for a polarizer supporting substrate having excellent adhesiveness. 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 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 formula (1), fc TD (−105) represents the degree of orientation of the PET crystal (−105) plane in the film TD direction obtained by wide-angle X-ray diffraction measurement) 0 ≦ α + β ≦ 15 ° (2) A film for a polarizer support substrate, wherein a coating layer containing an acrylic resin having an oxazoline group and a polyalkylene oxide chain and a polyester resin is provided on at least one side of the film. [Selection figure] None |