Title:
PROCESS FOR MANUFACTURE OF POLARIZING LAMINATE FILM, AND PROCESS FOR MANUFACTURE OF POLARIZING PLATE
Document Type and Number:
WIPO Patent Application WO/2012/096079
Kind Code:
A1
Abstract:
Provided is a process for manufacturing a polarizing laminate film having a small film thickness and high performance. A process for manufacturing a polarizing laminate film comprising a base film and a polarizer layer formed on one surface of the base film, which comprises a resin layer formation step, a stretching step and a dyeing step in this order, wherein the resin layer formation step comprises forming a resin layer containing a polyvinyl alcohol resin on one surface of the base film to produce a laminate film, the stretching step comprises carrying out the free-end uniaxial stretching of the laminate film, and the dyeing step comprises dyeing the resin layer in the laminate film with a dichroic dye to form the polarizer layer, and wherein the width (W1) of the laminate film that is not subjected to the free-end uniaxial stretching yet and the width (W2) of the laminate film that has been subjected to the free-end uniaxial stretching fulfill the relationship represented by formula (1).
(W1-W2)÷W1×100 ≥ 40 Formula (1)
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Inventors:
KAWAMURA SHINICHI (JP)
Application Number:
PCT/JP2011/078310
Publication Date:
July 19, 2012
Filing Date:
December 07, 2011
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
KAWAMURA SHINICHI (JP)
KAWAMURA SHINICHI (JP)
International Classes:
G02B5/30; B29C55/06; B32B27/30; G02F1/1335
Domestic Patent References:
| WO2009041383A1 | 2009-04-02 |
Foreign References:
| JP2001343522A | 2001-12-14 | |||
| JP2004170944A | 2004-06-17 | |||
| JP2002333521A | 2002-11-22 | |||
| JP2007057607A | 2007-03-08 | |||
| JP2004341515A | 2004-12-02 | |||
| JP2002326278A | 2002-11-12 | |||
| JPH06138320A | 1994-05-20 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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Claims: