METHODS FOR PRODUCING POLARIZING LAMINATE FILM AND POLARIZING PLATE

Title:

METHODS FOR PRODUCING POLARIZING LAMINATE FILM AND POLARIZING PLATE

Document Type and Number:

WIPO Patent Application WO/2012/077824

Kind Code:

A1

Abstract:

The present invention is a method for producing a polarizing laminate film that includes a base film, a primer layer, and a polarizer layer in this order, the method involving, in the following order: a step of forming a primer layer on one surface of a base film by coating a primer solution thereon; a step of forming a polyvinyl-alcohol-based resin layer on the primer layer and thereby preparing a laminate film that includes the base film, the primer layer, and the polyvinyl-alcohol-based resin layer in this order; a step of stretching the laminate film; and a step of dyeing the polyvinyl-alcohol-based resin layer of the laminate film with a dichroic dye and thereby making same into a polarizer layer. In said method, the concentration of epoxy-based cross-linking agent(s) in said primer solution is less than 0.1% by weight. The present invention can provide a polarizing-laminate-film production method that does not give rise to blocking even when the film is temporarily rolled up after forming the primer layer on the base film, does not cause the film to stick to conveyor rolls even in subsequent conveyance, and does not impair the adhesion between the base film and the polyvinyl-alcohol-based resin layer in the polarizing laminate film that has been produced.

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Inventors:

KAWAMURA SHINICHI (JP)

Application Number:

PCT/JP2011/078840

Publication Date:

June 14, 2012

Filing Date:

December 07, 2011

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO (JP)
KAWAMURA SHINICHI (JP)

International Classes:

G02B5/30

Foreign References:

JP2009300768A	2009-12-24
JP2001343521A	2001-12-14
JPS5169644A	1976-06-16
JP2009093074A	2009-04-30

Attorney, Agent or Firm:

NAKAYAMA, Tohru et al. (JP)
Nakayama 亨 (JP)

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