Title:
POLYVINYL ALCOHOL FILM, POLARIZING FILM AND POLARIZING PLATE, AND POLYVINYL ALCOHOL FILM PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/199140
Kind Code:
A1
Abstract:
A polyvinyl alcohol film which has an excellent balance of swelling properties and stretching properties during polarizing film manufacture, does not result in rupture during thin polarizing film production, and enables obtaining a polarizing film that exhibits high polarization performance and has few color irregularities, a polarizing film and polarizing plate using said polyvinyl alcohol film, and a polyvinyl alcohol film production method are provided. This polyvinyl alcohol film is such that when a first sample, cut out from the center in the width direction and having a rectangular shape of 40mm in the width direction (TD) by 270 mm in the length direction (MD), is immersed in 30°C water for 30 seconds, the amount of elongation WMD30 in the length direction of a portion that is 250 mm in the length direction prior to immersion is 30-50 mm, and, when a second sample, cut out from the center in the width direction and having a rectangular shape of 270 mm in the width direction (TD) by 40 mm in the length direction (MD), is immersed in 30°C water for 300 seconds, the amount of elongation WTD300 in the width direction of a portion that is 250 mm in the width direction prior to immersion is 15-60 mm.
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Inventors:
SHIMIZU TOSHIHIRO (JP)
KITAMURA SHUICHI (JP)
TERAMOTO YUUICHI (JP)
KITAMURA SHUICHI (JP)
TERAMOTO YUUICHI (JP)
Application Number:
PCT/JP2018/016753
Publication Date:
November 01, 2018
Filing Date:
April 25, 2018
Export Citation:
Assignee:
NIPPON SYNTHETIC CHEM IND CO LTD (JP)
International Classes:
G02B5/30; B29C55/08; C08J5/18; B29K29/00; B29L7/00; B29L11/00
Domestic Patent References:
| WO2016060097A1 | 2016-04-21 | |||
| WO2016093259A1 | 2016-06-16 | |||
| WO2010071094A1 | 2010-06-24 | |||
| WO2016068152A1 | 2016-05-06 |
Foreign References:
| JP2012058383A | 2012-03-22 | |||
| JP2004361787A | 2004-12-24 | |||
| JP2009230115A | 2009-10-08 | |||
| JP2013011872A | 2013-01-17 | |||
| JP2014016649A | 2014-01-30 | |||
| JP2012066572A | 2012-04-05 | |||
| JP2012042929A | 2012-03-01 | |||
| JP2012032789A | 2012-02-16 |
Attorney, Agent or Firm:
SAITOH Yukihiko et al. (JP)
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