Title:
MANUFACTURING METHOD FOR POLARIZING FILM
Document Type and Number:
WIPO Patent Application WO/2013/054626
Kind Code:
A1
Abstract:
This manufacturing method for a polarizing film, in which at least a swelling treatment, a dyeing treatment, a crosslinking treatment, a stretching treatment, and a cleaning treatment are carried out on a polyvinyl alcohol film, is characterized in that during at least one of the treatments subsequent to the crosslinking treatment, a water-soluble antioxidant is added to the treatment liquid so as to satisfy the following formula (1): 0.0005≤A×B≤0.03 (1) (in the formula, A represents the concentration (mol/L) of the water-soluble antioxidant in the treatment bath, and B represents the reductive power of the water-soluble antioxidant in the reduction of iodine to iodine ions). This manufacturing method makes it possible to provide a polarizing film having high contrast and excellent polarizing capabilities for preventing the occurrence of light leakage in the short wavelength region.
Inventors:
YASEN MUNIRIDIN (JP)
OGOMI DAISUKE (JP)
SAIKI YUUJI (JP)
OGOMI DAISUKE (JP)
SAIKI YUUJI (JP)
Application Number:
PCT/JP2012/073355
Publication Date:
April 18, 2013
Filing Date:
September 12, 2012
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
YASEN MUNIRIDIN (JP)
OGOMI DAISUKE (JP)
SAIKI YUUJI (JP)
YASEN MUNIRIDIN (JP)
OGOMI DAISUKE (JP)
SAIKI YUUJI (JP)
International Classes:
G02B5/30; G02F1/1335
Foreign References:
| JPS6438702A | 1989-02-09 | |||
| JP2000241626A | 2000-09-08 | |||
| JP2006509250A | 2006-03-16 | |||
| JP2012108202A | 2012-06-07 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Patent business corporation ユニアス international patent firm (JP)
Patent business corporation ユニアス international patent firm (JP)
Download PDF:
Claims: