Patent ID: 11845841

Abstract:
Provided are a foldable display that is excellent in mass production applicability, and that does not have image distortion that can appear in the folding portion after the display is repeatedly folded; and a mobile device equipped with such a foldable display. Provided are a polyester film for surface protection films and a hard coating film for surface protection films for the foldable display and mobile device. The polyester film is for foldable display surface protection films, wherein the polyester film is cut in sheet form, the polyester film has a thickness of 10 to 75 μm, the polyester film has an intrinsic viscosity of 0.55 to 0.65 dl/g, and the amount of rise of a cut plane on at least one side of one or more cut end portions is 35 μm or less. The hard coating film, the foldable display, and the mobile device use the polyester film for foldable display surface protection films.