BIAXIALLY ORIENTED POLYESTER FILM

To obtain a polyester film that has excellent pinhole resistance and bag breakage resistance, excellent adhesiveness after boiling or retorting, and little pitch deviation during printing or position deviation during laminating with a sealant, etc. A biaxially oriented polyester film simultaneously...

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Bibliographische Detailangaben
Hauptverfasser:	TAMARI, Noboru, GOTO, Takamichi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING 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 THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	To obtain a polyester film that has excellent pinhole resistance and bag breakage resistance, excellent adhesiveness after boiling or retorting, and little pitch deviation during printing or position deviation during laminating with a sealant, etc. A biaxially oriented polyester film simultaneously fulfilling (a)-(d). (a) Being a polyester resin composition containing 60%-90% by weight polybutylene teraphthalate resin (A) and 10%-40% by weight of a polyester resin (B) other than the polybutylene teraphthalate resin (A). (b) Having a dimensional change rate at 80°C of no more than 1.0% in the longitudinal direction of the film, relative to a film base length of a temperature dimensional change curve measured using a thermal mechanical analyzer. (c) Having a thermal shrinkage at 150°C of no more than 4.0% in both the longitudinal and width directions of the film. (d) Having a film plane orientation ΔP of 0.136-0.154.