BIAXIALLY ORIENTED POLYESTER FILM AND METAL-LIKE LAMINATED FILMS

• Main Authors: TAKIZAWA YOSUKE, MATSUI RYOSUKE, SUMI SAORI, MANABE ISAO, KIMURA MASAHIRO
• Format: Patent
• Language: English
• Published: 11.12.2007
• 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

A biaxially oriented polyester film comprising at least three polyester resin layers (A1/B/A2), wherein the main component constituting the A layers is polyethylene terephthalate, the film has a melting point of 246 to 270°C, and the stresses of the film in the machine and transverse directions at 100% elongation at 150°C and 200°C satisfy the relationships: 2 < (F100MD + F100TD) < 100 and 1 < F100TD < 60. The invention provides films which exhibit such dimensional stability to heat as to withstand uniform metal vapor deposition and little change in surface appearance between before and after thermoforming and which can be easily formed along a mold with a low forming stress.