Title:
OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2024/095968
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide an optical film that suppresses decreases in initial adhesiveness in long-term use at high temperatures and high humidity, and that can suppress whitening of an easily adhesive layer and deterioration in optical properties due to stretching or the like. [Solution] An optical film including: a resin film containing an acrylic resin as the main component thereof; and an easily adhesive layer which is laminated on one surface of the resin film, wherein the optical film is characterized in that the easily adhesive layer contains a polycarbonate-based polyurethane as the main component thereof, the polycarbonate-based polyurethane has a weight-average molecular weight of 200,000-2,500,000, and the shearing loss tangent temperature curve (-50ºC to 160ºC inclusive, 1 Hz) obtained by a dynamic viscoelasticity test exhibits a plurality of maximum values.
Inventors:
TANIZAWA KATSUYA (JP)
MATSUMOTO TADAHIRO (JP)
MATSUMOTO TADAHIRO (JP)
Application Number:
PCT/JP2023/039122
Publication Date:
May 10, 2024
Filing Date:
October 30, 2023
Export Citation:
Assignee:
OKURA INDUSTRIAL CO LTD (JP)
International Classes:
G02B5/30; B29C55/20; C08J7/043; C09D175/04
Domestic Patent References:
| WO2010119755A1 | 2010-10-21 | |||
| WO2022114000A1 | 2022-06-02 |
Foreign References:
| JP2021028703A | 2021-02-25 | |||
| JP2022145538A | 2022-10-04 |
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