Polyamideimide film and flexible display panel including the same
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United States of America Patent
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Apr 16, 2024
Grant Date -
Oct 21, 2021
app pub date -
Apr 19, 2021
filing date -
Apr 20, 2020
priority date (Note) -
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Abstract
Provided are a polyamideimide film, a window cover film, and a display panel including the same. More specifically, a polyamideimide film including an amideimide structure derived from a dianhydride, a diamine, and an aromatic diacid dichloride is provided, wherein a chlorine content in the film is 5 to 33 ppm and a yellow index change amount ΔYI is 5 or less, the yellow index change amount being measured in accordance with ASTM E313 after repeating a process of irradiating 0.55 W/m2 of UVA at 340 nm at 40° C. for 20 hours and then blocking UVA for 4 hours three times.
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