FILM PREPARED FROM PLASTICIZED POLYESTER

PROBLEM TO BE SOLVED: To provide a method of producing a soft and flexible film or sheet having Tg of lower than 23°C and Tm of more than 120°C, wherein the method can prevent the blocking of the film or sheet and the sticking to the roll in a step of processing the film or sheet.SOLUTION: A film or...

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Bibliographische Detailangaben
Hauptverfasser:	MOSKALA ERIC JON, GILMER JOHN WALKER, HORTON KEVIN DOUGLAS, PINER RODNEY LAYNE
Format:	Patent
Sprache:	eng
Schlagworte:	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 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 USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of producing a soft and flexible film or sheet having Tg of lower than 23°C and Tm of more than 120°C, wherein the method can prevent the blocking of the film or sheet and the sticking to the roll in a step of processing the film or sheet.SOLUTION: A film or sheet having a glass transition temperature below about 23°C and a melting temperature greater than about 120°C is prepared by first preparing a polyester composition of: about 50 to about 95 wt.% of a base copolyester having a melting temperature of less than about 220°C and exhibiting more than about 1% crystallinity after annealing for 2,000 minutes at a temperature at which the base copolyester has a maximum crystallization rate; and about 5 to about 50 wt.% of a plasticizer suitable for use with the base copolyester. The polyester composition is formed into a film or sheet. During formation of the film or sheet or afterwards, crystallization is induced to provide the soft and flexible film or sheet.