Title:
METHOD FOR PRODUCING OPTICAL FILM, POLARIZING PLATE, AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/123912
Kind Code:
A1
Abstract:
This method for producing an optical film includes a peeling step in which a multilayer film is subjected to peeling processing. The multilayer film is long, and includes: a film (A) comprising a thermoplastic resin A; and a film (B) which is provided to one or both surfaces of film (A). The peeling processing includes peeling film (B) from film (A) at temperature Tov (˚C) such that a force is applied in the thickness direction of film (A). Temperature Tov and the glass transition temperature TgA(˚C) of film (A) satisfy the relationship Tov≥TgA. Film (B) has a shrinkage ratio Xb of at least 0% but less than 4%. The shrinkage ratio Xb is for the width direction of film (B) when film (B) is processed at temperature Tov for 60 seconds. Also provided are a polarizing plate and a display device which use said optical film.
Inventors:
SUDEJI HIRONARI (JP)
Application Number:
PCT/JP2017/046252
Publication Date:
July 05, 2018
Filing Date:
December 22, 2017
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G02B5/30; B29C55/04; G02F1/1335; G02F1/13363; G09F9/30; H01L27/32; H01L51/50; H05B33/02; B29K45/00; B29L7/00; B29L9/00; B29L11/00
Foreign References:
| JP2010102288A | 2010-05-06 | |||
| JP2011039343A | 2011-02-24 | |||
| JPH08146217A | 1996-06-07 | |||
| JP2010085574A | 2010-04-15 | |||
| JP2010007036A | 2010-01-14 | |||
| JP2001013324A | 2001-01-19 | |||
| US20150076719A1 | 2015-03-19 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF: