Title:
METHOD FOR PRODUCING OPTICAL LAMINATE
Document Type and Number:
WIPO Patent Application WO/2019/078050
Kind Code:
A1
Abstract:
The present invention provides a method for obtaining an optical laminate in which curling is reduced while the transparency of a thermoplastic resin substrate is maintained. This method for producing an optical laminate includes forming a polyvinyl alcohol resin layer on a thermoplastic resin substrate to produce a laminate, performing a stretching process and a dyeing process on the polyvinyl alcohol resin layer to produce a polarizing film, and performing contact heating on the laminate and performing a crystallization process on the thermoplastic resin substrate, wherein the crystallization process includes a first crystallization process step in which the crystallinity index of the thermoplastic resin substrate is increased and set to a first prescribed value, and a second crystallization process step in which the crystallinity index of the thermoplastic resin substrate is set to a second prescribed value greater than the first prescribed value.
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Inventors:
YASEN MUNIRIDING (JP)
HAMAMOTO DAISUKE (JP)
IKESHIMA KENTARO (JP)
MIYATAKE MINORU (JP)
HAMAMOTO DAISUKE (JP)
IKESHIMA KENTARO (JP)
MIYATAKE MINORU (JP)
Application Number:
PCT/JP2018/037532
Publication Date:
April 25, 2019
Filing Date:
October 09, 2018
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B29C55/06; B32B7/02; B32B27/30; B32B27/36; B29K29/00; B29L7/00; B29L11/00; C08J5/18
Foreign References:
| JP2016122040A | 2016-07-07 | |||
| JP2017134415A | 2017-08-03 | |||
| JP2013011847A | 2013-01-17 | |||
| JP2017156662A | 2017-09-07 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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