METHOD FOR PRODUCING OPTICAL LAMINATE

WIPO Patent Application WO/2024/084805

A1

[Problem] To provide a method for producing an optical laminate, the method being capable of suppressing curling. [Solution] A method for producing an optical laminate 100 according to the present invention comprises a step in which a first optical film F1 comprising a polarizing plate 10 and a second optical film F2 are bonded to each other, with an adhesive layer 3 being interposed therebetween, by a bonding roller R1. The bonding roller is composed of a first roller R1a which comes into contact with the first optical film, and a second roller R1b which comes into contact with the second optical film. The surface of the first roller is formed of a resin, while the surface of the second roller is formed of a metal or a resin. The approach angle α of the first optical film with respect to the bonding roller is adjusted so that the curling value in the TD direction of a laminate F3 of the first optical film and the second optical film is within a predetermined range, or alternatively, in cases where the surface of the second roller is formed of a resin, the approach angle β of the second optical film with respect to the bonding roller is adjusted so that the curling value in the TD direction of the laminate F3 is within a predetermined range.

DESAKI SHINOBU (JP)
DOMEN MASAFUMI (JP)
SHIRAKO MIRAI (JP)
IWAMOTO NOBUAKI (JP)

PCT/JP2023/030511

April 25, 2024

August 24, 2023

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NITTO DENKO CORP (JP)

G02B5/30; B65H37/04

JP2005007748A	2005-01-13
JP2015090388A	2015-05-11
JP2011158908A	2011-08-18
JP2013080219A	2013-05-02

MAKOTO INTERNATIONAL PATENT ATTORNEYS OFFICE (JP)

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