Title:
PRODUCTION DEVICE AND PRODUCTION METHOD FOR POLARIZING FILM, AND POLARIZING FILM
Document Type and Number:
WIPO Patent Application WO/2017/104634
Kind Code:
A1
Abstract:
The present invention provides a device and method for producing a polarizing film that suppresses the occurrence of bright spots (light leakage) when employed in a liquid crystal display device. Provided is a production device for producing a polarizing film from a polyvinyl alcohol resin film, wherein the production device includes a plurality of rollers that form a conveyance path for the polyvinyl alcohol resin film and are disposed so as to be in contact with the surface of the polyvinyl alcohol resin film, a wet treatment unit that is disposed upon the conveyance path and includes at least one treatment tank housing a treatment liquid into which the polyvinyl alcohol resin film is immersed, and a drying treatment unit that is disposed upon the conveyance path and is for drying the polyvinyl alcohol resin film following the wet treatment. The plurality of rollers include a low rolling resistance roller with a rolling resistance of 0.025 N or less. Also provided are a production method using this device, and a polarizing film in which the density of specific concave and convex defects is no higher than 20 defects/m2.
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Inventors:
FURUYA TSUTOMU (JP)
SHIRAISHI YUICHI (JP)
SERIKAWA YUJI (JP)
SHIRAISHI YUICHI (JP)
SERIKAWA YUJI (JP)
Application Number:
PCT/JP2016/086988
Publication Date:
June 22, 2017
Filing Date:
December 13, 2016
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; B05D1/18; B05D3/00; B05D7/04; B65H27/00
Foreign References:
| JP2011186085A | 2011-09-22 | |||
| JP2012013989A | 2012-01-19 | |||
| JP2009103854A | 2009-05-14 | |||
| JP2004078208A | 2004-03-11 | |||
| JP2014142392A | 2014-08-07 | |||
| JP2014109740A | 2014-06-12 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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