Invention Grant
- Patent Title: Cellulose ester film, method for production of cellulose ester film, and protective film for polarizing plate, polarizing plate and liquid crystal display device each using the cellulose ester film
- Patent Title (中): 纤维素酯膜,纤维素酯膜的制造方法以及偏振片用保护膜,偏振片和液晶显示装置,各自使用纤维素酯膜
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Application No.: US12664683Application Date: 2008-07-03
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Publication No.: US08274625B2Publication Date: 2012-09-25
- Inventor: Takatugu Suzuki , Takayuki Suzuki
- Applicant: Takatugu Suzuki , Takayuki Suzuki
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Lucas & Mercanti, LLP
- Priority: JP2007-188137 20070719; JP2007-209231 20070810
- International Application: PCT/JP2008/062083 WO 20080703
- International Announcement: WO2009/011229 WO 20090122
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
Disclosed is a cellulose ester film which rarely causes the attachment of foreign matters to the surface of a conveying roll or the failure of film transfer induced by the attachment of the foreign matters, which is free of the partial deformation caused by foreign matters on the conveying roll, exhibits high durability after saponification treatment, has good close adhesion to a polarizer, and has excellent processing suitability in the processing into a polarizer. Also disclosed is a method for producing the cellulose ester film by a melt-casting process. Further disclosed are; a protective film for a polarizing plate, which has high film strength; a polarizing plate having high durability; and a liquid crystal display having high image quality; each comprising the cellulose ester film. The cellulose ester film comprises a cellulose ester, a compound represented by the general formula (1) and a compound represented by the general formula (2).
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