HEAT-SHRINKABLE POLYESTER FILM, PROCESS FOR PRODUCTION THEREOF, AND PACKAGE

• Main Authors: TABOTA, NORIMI, NOSE, KATSUHIKO, HARUTA, MASAYUKI
• Format: Patent
• Language: English; French; Japanese
• Published: 06.03.2008
• Subjects: ADVERTISING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; CONVEYING; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LABELS OR NAME-PLATES; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKING; PERFORMING OPERATIONS; PHYSICS; SEALS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SIGNS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; UNPACKING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

[PROBLEMS] To provide a heat-shrinkable polyester film which can be easily torn along perforations and which exhibits extremely high productivity. [MEANS FOR SOLVING PROBLEMS] A heat-shrinkable polyester film made from a polyester resin which comprises ethylene terephthalate units as the main constituent and contains at least 15% by mole of units derived from at least one monomer capable of forming a non-crystalline component based on the whole polyester resin and which exhibits specific heat shrinkage characteristics and specific mechanical characteristics after the heat shrinkage. L'invention concerne un film polyester thermorétractable pouvant être aisément déchiré le long de perforations et présentant une productibilité extrêmement élevée. Le film polyester selon l'invention est fabriqué à partir d'une résine polyester contenant des unités éthylène téréphtalate comme composant principal et au moins 15% en moles d'unités provenant d'au moins un monomère apte à former un composant non cristallin à partir de la résine polyester. Ledit film présente des caractéristiques de thermorétractabilité et des caractéristiques mécaniques particulières après thermorétraction.