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1. (WO2018062031) OPTICAL FILM AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2018/062031    International Application No.:    PCT/JP2017/034272
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Sat Sep 23 01:59:59 CEST 2017
IPC: C08J 5/18
B23K 26/38
B23K 26/53
C08K 3/22
C08L 79/08
Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED
住友化学株式会社
Inventors: IKEUCHI, Junichi
池内 淳一
NISHI, Kojiro
西 幸二朗
UEDA, Koji
植田 幸治
Title: OPTICAL FILM AND METHOD FOR MANUFACTURING SAME
Abstract:
Provided is an optical film in which cracks are unlikely to form in end parts even if preserved in a high-temperature, high-humidity environment in a deformed state. This optical film comprises a polyimide polymer including an intramolecular fluorine atom, the atomic ratio (F/C) of fluorine atoms relative to carbon atoms at the end surfaces of the optical film as measured using X-ray photoelectron spectroscopy being greater than the atomic ratio (F/C) of fluorine atoms relative to carbon atoms in sections cut 1 mm inside from the end surfaces of the optical film as measured using X-ray photoelectron spectroscopy.