Title:
METHOD FOR PRODUCING OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2022/124076
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing an optical film which has excellent adhesion between a cycloolefin-based film having a high stretching magnification (a stretching magnification of 2.5 times or more) and an easily adhesive layer and is less likely to peel off from other components such as a polarizer. [Solution] A method for producing an optical film is characterized by comprising: a step for coating at least one surface of a stretched film composed of a thermoplastic resin mainly containing a polymer having an alicyclic structure with an easily adhesive composition containing a polycarbonate-based polyurethane having a glass transition temperature (Tg) of 100-150 °C, which is diluted with an aqueous solvent to form a coating film; and a step for drying the coating film to form an easily adhesive layer.
Inventors:
MATSUMOTO TADAHIRO (JP)
YOSHIZAWA MASAHIRO (JP)
KUSUHARA MASAKI (JP)
SUGIHARA KIYOHIRO (JP)
YOSHIZAWA MASAHIRO (JP)
KUSUHARA MASAKI (JP)
SUGIHARA KIYOHIRO (JP)
Application Number:
PCT/JP2021/042986
Publication Date:
June 16, 2022
Filing Date:
November 24, 2021
Export Citation:
Assignee:
OKURA INDUSTRIAL CO LTD (JP)
International Classes:
G02B5/30; B29C55/02; C08J7/043; C09D5/02; C09D175/04
Domestic Patent References:
| WO2016047359A1 | 2016-03-31 | |||
| WO2018221466A1 | 2018-12-06 |
Foreign References:
| JP2015024511A | 2015-02-05 | |||
| JP2017097283A | 2017-06-01 | |||
| JP2017015743A | 2017-01-19 | |||
| JP2019157071A | 2019-09-19 | |||
| JP2020196255A | 2020-12-10 |
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