Optical polyester film for flexible display

The invention belongs to the field of polyester films, and relates to an optical polyester film for flexible display, which has a single-layer A structure, a double-layer A/B structure, a three-layer A/B/A structure or an A/B/C structure, wherein the layer A, the layer C or/and the layer B contain modified polyester; and then the single-layer A structure, the double-layer A/B structure, the three-layer A/B/A structure or the A/B/C structure is manufactured through two-way stretching. The optical polyester film has the advantages of being resistant to bending, sufficient in flexibility, high in flexibility resistance and the like, and the product can be widely applied to flexible display, especially the field of folding screen display. 本发明属于聚酯薄膜领域，涉及一种柔性显示用光学聚酯薄膜，所述光学聚酯薄膜具有单层A、双层A/B、三层A/B/A或A/B/C结构；其中，A层、C层或/和B层含有改性聚酯；然后单层A、双层A/B、三层A/B/A或A/B/C结构经双向拉伸制成。本申请的光学聚酯薄膜具有耐弯折、柔韧性足、抗挠性强等特点，产品可广泛应用于柔性显示，特别是折叠屏显示领域。