BIAXIAL ORIENTATION FILM OF CYCLIC OLEFIN COPOLYMER AND MANUFACTURE THEREOF

• Main Authors: KITAMURA HIDEKI, TERAMOTO KAKICHI
• Format: Patent
• Language: English
• Published: 09.09.1997
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a film consisting of amorphous cyclic olefin copolymer having small unevenness in its thickness and capable of being film-formed without the use of a solvent. SOLUTION: The film has a thickness of 25μm or less and consists of biaxial orientation amorphous cyclic olefin copolymer that satisfies a formula of |a-b|/(A-B)<=0.1 in difference between the tensile destruction elongation A and the tensile destruction elongation B normal to its direction. The film formed in this manner is obtained that a sheet consisting of amorphous cyclic olefin copolymer and a sheet consisting of crystal resin being in an amorphous state are superimposed directly or via a thin film-interposed layer having a thickness of 20μm, and layers are closely adhered with each other in mutual relation to then be subjected to a biaxial orientation at a glass transit temperature or higher of amorphous cyclic olefin copolymer and a crystal melting point or lower of crystal resin, and the crystal resin sheet is separated therefrom as required.