POLYESTER FILM FOR FORMING

• Main Authors: FUJITA SHINJI, SASAKI YASUSHI, KUMANO KATSUFUMI, HIGASHIURA MASAYA, TANABE MASATOSHI, ITO KATSUYA
• Format: Patent
• Language: English
• Published: 20.10.2005
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; 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 polyester film for forming which has excellent formability especially at a low temperature and low pressure, is excellent in solvent resistance and heat resistance, and is reduced in environmental burden. SOLUTION: The polyester film for forming consists of a biaxially oriented polyester film, and the above film comprises a copolyester as a component and is characterized in that: (1) the stress at 100% elongation of the film in each of the machine direction and the transverse direction is 10 to 1,000 MPa at 25°C and is 1 to 100 MPa at 100°C, (2) the storage viscoelasticity (E') of the film in each of the machine direction and the transverse direction is 10 to 1,000 MPa at 100°C and is 5 to 40 MPa at 180°C, and (3) thermal distortion rate (initial load, 49 mN) of the film in the machine direction is -3% to +3% at 175°C. COPYRIGHT: (C)2006,JPO&NCIPI