Title:
PROCESS FOR PRODUCING CELLULOSE ESTER FILM AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/015369
Kind Code:
A1
Abstract:
This invention provides a process for producing a cellulose ester film, which has
small birefringence properties, is a thin film and has excellent optical isotropic
properties, and a liquid crystal display device which can significantly reduce
light leakage in an oblique direction, and can realize a wide visible angle. The
production process of a cellulose ester film is characterized by comprising the
steps of casting a dope containing a cellulose ester and a retardation reduction additive
onto a support, separating the film from the support, stretching the separated
film by a tenter, drying the film after stretching, and winding the dried film,
the film being produced under such production conditions that, in a stage from
the separation of the film from the support to winding of the film, a requirement
of -20% ≤ MD + TD ≤ 0% is satisfied wherein MD represents the stretching
of the film in the transfer direction, %, and TD represents the stretching of the
film in the widthwise direction, %.
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Inventors:
SHIMIZU, Kazuyuki (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
Application Number:
JP2006/314215
Publication Date:
February 08, 2007
Filing Date:
July 19, 2006
Export Citation:
Assignee:
Konica Minolta Opto, Inc. (2970, Ishikawa-machi Hachioji-sh, Tokyo 05, 1928505, JP)
コニカミノルタオプト株式会社 (〒05 東京都八王子市石川町２９７０番地 Tokyo, 1928505, JP)
コニカミノルタオプト株式会社 (〒05 東京都八王子市石川町２９７０番地 Tokyo, 1928505, JP)
International Classes:
B29C55/02; B29C41/28; C08J5/18; G02B5/30; G02F1/1335; B29K1/00; B29L7/00
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