Title:
METHOD FOR MANUFACTURING RETARDATION FILM
Document Type and Number:
Japanese Patent JP2003172820
Kind Code:
A
Abstract:
To provide a method for manufacturing a retardation plate having uniform phase difference even when the film comprises a thermoplastic resin film or sheet formed by a flow casting method and having ≥1 μm fluctuation in the thickness in the flowing direction.
An employed manufacturing facility is equipped with: a detector to detect the amount of the residual solvent in the thermoplastic resin film or sheet before stretching; and a heating device controlled with the signals obtained by the detector.
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Inventors:
NAKADA SHOICHI
ISHIMARU TSUNATOSHI
ISHIMARU TSUNATOSHI
Application Number:
JP2001371711A
Publication Date:
June 20, 2003
Filing Date:
December 05, 2001
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
G01N21/33; B29C55/02; G02B5/30; B29K101/12; B29L7/00; B29L11/00; (IPC1-7): G02B5/30; B29C55/02; G01N21/33