Title:
POLARIZING FILM MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/196618
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for continuously and stably manufacturing a polarizer and a polarizing film that has excellent adhesion between a transparent protective film and an adhesive agent layer. A polarizing film manufacturing method according to the present invention is characterized by comprising: a first coating step for forming a first coating film by coating a readily-adhering composition containing a polymerizable compound X having an SP value of 21.0-26.0 (MJ/m3)1/2 onto a lamination surface of a polarizer; a second coating step for forming a second coating film by coating an adhesive agent composition containing the polymerizable compound X onto a lamination surface of a transparent protective film; a thickness measuring step for in-line measuring the thicknesses of the first coating film and the second coating film; and a coating amount adjustment step for adjusting the coating amount of the readily-adhering composition in the first coating step and/or the coating amount of the adhesive agent composition in the second coating step on the basis of the thicknesses of the first coating film and the second coating film obtained by the in-line measurement, such that the content of the polymerizable compound X in an uncured adhesive agent layer obtained by laminating the first coating film and the second coating film is 40-64 mass%.
Inventors:
DAIGAKU NORITSUGU (JP)
YAMASAKI TATSUYA (JP)
YAMASAKI TATSUYA (JP)
Application Number:
PCT/JP2020/013325
Publication Date:
October 01, 2020
Filing Date:
March 25, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B05D3/00; B05D7/00; B05D7/24; B32B7/023; B32B37/12; C09J4/02; C09J5/04; G02B5/30
Foreign References:
| JP2015093470A | 2015-05-18 | |||
| JP2012203205A | 2012-10-22 | |||
| JP2012203108A | 2012-10-22 | |||
| JP2000325855A | 2000-11-28 | |||
| JP2017137397A | 2017-08-10 | |||
| JP2012256064A | 2012-12-27 | |||
| JP2016186558A | 2016-10-27 | |||
| JP2014043099A | 2014-03-13 | |||
| JP2016177248A | 2016-10-06 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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