Title:
METHOD FOR MANUFACTURING LAYERED BODY AND POLARIZING FILM
Document Type and Number:
WIPO Patent Application WO/2019/012968
Kind Code:
A1
Abstract:
The present invention provides a manufacturing method whereby bubbles and foreign matter can both be removed to a high degree at the same time, resulting in the ability to obtain a layered body in which appearance defects are suppressed. This method for manufacturing a layered body includes the steps of causing a coating liquid including a polyvinyl alcohol-based resin to pass through a plurality of depth-type filters and removing bubbles and foreign matter therefrom, and applying the coating liquid passed through the plurality of depth-type filters to one side of a resin substrate and drying the coating liquid to form a polyvinyl alcohol-based resin layer. The plurality of depth-type filters include at least three types of depth-type filters having mutually different filtering precisions, the final depth-type filter through which the coating liquid passes last has the lowest filtering precision, and the filtering precision of the final depth-type filter is 50 µm to 100 µm.
Inventors:
ISHIMARU SAKIMI (JP)
KAMIJO TAKASHI (JP)
KAMIJO TAKASHI (JP)
Application Number:
PCT/JP2018/023932
Publication Date:
January 17, 2019
Filing Date:
June 25, 2018
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B05D7/24; B05D7/02; G02B5/30; G02F1/1335; B32B38/18
Domestic Patent References:
| WO2012147633A1 | 2012-11-01 | |||
| WO2017204270A1 | 2017-11-30 |
Foreign References:
| JP2015013242A | 2015-01-22 | |||
| JP2004155191A | 2004-06-03 | |||
| JP2002144419A | 2002-05-21 | |||
| JP2016520881A | 2016-07-14 | |||
| JP2016190407A | 2016-11-10 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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