Cyclic olefin copolymer film or processing method of the sheet, and cyclic olefin copolymer film or sheet

摘要

PROBLEM TO BE SOLVED: To provide a method of treatment for obtaining a film or a sheet containing a cycloolefin copolymer which has a high heat resistance and transparency, an excellent chemical resistance, dimensional stability and tensile property and a film or sheet obtained by the method and suitable for use in optical parts.;SOLUTION: The film or the sheet which has a high heat resistance and transparency, an excellent chemical resistance, dimensional stability and tensile property is obtained by bringing the film or the sheet containing a cycloolefin copolymer having a hydrolyzable silyl group into contact with a water-containing liquid composition at 100-250°C. The film or sheet obtained by the method is suitable for use in optical parts.;COPYRIGHT: (C)2004,JPO