US 12,379,616 B2
Optical film, polarizer protective film, transfer body for polarizer protective film, polarization plate, image display device, and method for manufacturing polarizer protective film
Seiichi Isojima, Tokyo (JP); Takahisa Nomura, Tokyo (JP); Tomoyuki Horio, Tokyo (JP); Makoto Nanaumi, Tokyo (JP); Kana Horii, Tokyo (JP); Yusuke Hiruma, Tokyo (JP); and Takashi Kuroda, Tokyo (JP)
Assigned to Dai Nippon Printing Co., Ltd., Tokyo (JP)
Appl. No. 17/419,050
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Dec. 27, 2019, PCT No. PCT/JP2019/051630
§ 371(c)(1), (2) Date Jun. 28, 2021,
PCT Pub. No. WO2020/138502, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-247909 (JP), filed on Dec. 28, 2018; and application No. 2019-028249 (JP), filed on Feb. 20, 2019.
Prior Publication US 2022/0075227 A1, Mar. 10, 2022
Int. Cl. G02F 1/00 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); H10K 85/10 (2023.01); H10K 50/86 (2023.01); H10K 59/80 (2023.01)
CPC G02F 1/0063 (2013.01) [G02F 1/133305 (2013.01); G02F 1/133509 (2013.01); G02F 1/133528 (2013.01); H10K 85/10 (2023.02); H10K 50/865 (2023.02); H10K 59/8792 (2023.02)] 11 Claims
OG exemplary drawing
 
1. An optical film comprising a light-transmitting base material, a first functional layer, and a second functional layer in this order;
wherein the light-transmitting base material contains at least one selected from the group consisting of a cellulose acetate resin, a cycloolefin polymer resin, and a (meth)acrylic resin;
at least one of the first functional layer and the second functional layer contains an ultraviolet absorber;
the optical film further comprises a mixed layer provided between the first functional layer and the second functional layer, being adjacent to the first functional layer and the second functional layer, and containing a component of the first functional layer and a component of the second functional layer;
the total film thickness of the first functional layer, the second functional layer, and the mixed layer is 1 μm or more and 10 μm or less;
the ratio of the film thickness of the mixed layer to the total film thickness of the first functional layer, the second functional layer, and the mixed layer is 0.6% or more and 40% or less; and
the first functional layer contains a polymer of a radiation-polymerizable compound.