Title:
PROCESS FOR PRODUCING PHASE DIFFERENCE FILM, PHASE DIFFERENCE FILM, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/043573
Kind Code:
A1
Abstract:
This invention provides a process for producing a phase difference film characterized by comprising stretching a norbornene resin film in a film roll widthwise direction by a factor of 1.5 to 5 and shrinking the film in the longitudinal direction to produce a phase difference film of which the optical axis is in the widthwise direction of the film roll. The process for producing a phase difference film can produce a phase difference film of a norbornene resin that has excellent transparency, dimensional stability, and view angle properties, has low gas permeability, has an optical axis in the cross direction, and has no significant variation in in-plane phase difference. There is also provided a process for producing a polarizing plate that can produce a high-performance polarizing plate in a simple manner with high production efficiency.
Inventors:
MITSUBOSHI TOMOHIRO (JP)
SEKIGUCHI MASAYUKI (JP)
USHINO TAKUHIRO (JP)
SEKIGUCHI MASAYUKI (JP)
USHINO TAKUHIRO (JP)
Application Number:
PCT/JP2006/320306
Publication Date:
April 19, 2007
Filing Date:
October 11, 2006
Export Citation:
Assignee:
JSR CORP (JP)
MITSUBOSHI TOMOHIRO (JP)
SEKIGUCHI MASAYUKI (JP)
USHINO TAKUHIRO (JP)
MITSUBOSHI TOMOHIRO (JP)
SEKIGUCHI MASAYUKI (JP)
USHINO TAKUHIRO (JP)
International Classes:
G02B5/30; B29C55/08; C08J5/18; B29K45/00; B29L11/00
Foreign References:
| JP2005181450A | 2005-07-07 | |||
| JP2006133720A | 2006-05-25 |
Attorney, Agent or Firm:
SUZUKI, Shunichiro (Gotanda Yamazaki Bldg. 6F 13-6, Nishigotanda 7-chome, Shinagawa-k, Tokyo 31, JP)
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