RETARDATION FILM
    1.
    发明申请
    RETARDATION FILM 审中-公开

    公开(公告)号:US20200025989A1

    公开(公告)日:2020-01-23

    申请号:US16583814

    申请日:2019-09-26

    Abstract: Provided are: a novel retardation film which has low photoelastic coefficient, while having good linear thermal expansion coefficient and water absorption; and the novel retardation film which additionally has high heat resistance. The above-described problem is solved by a retardation film which has an absolute value of the linear thermal expansion coefficient of 100 ppm/° C. or less, a glass transition temperature of 180° C. or more, a photoelastic coefficient of from 5×10−12 m2/N to 30×10−12 m2/N and a water absorption of 2.0 wt % or less, or a retardation film which has an absolute value of the linear thermal expansion coefficient of 100 ppm/° C. or less, a photoelastic coefficient of from 5×10−12 m2/N to 30×10−12 m2/N and a water absorption of 2.0 wt % or less.

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