Post-treatment method for crystallizable and biodegradable polyester or moldings thereof

The invention discloses a post-treatment method for a crystallizable and biodegradable polyester or moldings thereof, which comprises: subjecting the crystallizable and biodegradable polyester or moldings thereof to primary crystallization at the temperature of between the glass transition temperatu...

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Bibliographische Detailangaben
Hauptverfasser:	XIA TIAN, LAI ZHENGZHENG
Format:	Patent
Sprache:	chi ; 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 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
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Beschreibung
Zusammenfassung:	The invention discloses a post-treatment method for a crystallizable and biodegradable polyester or moldings thereof, which comprises: subjecting the crystallizable and biodegradable polyester or moldings thereof to primary crystallization at the temperature of between the glass transition temperature and thermal decomposition temperature of crystallizable and biodegradable polyester or moldings thereof; and performing secondary crystallization at the temperature of between the glass transition temperature and thermal decomposition temperature of crystallizable and biodegradable polyester or moldings thereof. Compared with the common method for crystallizing by a heat treatment process, the method which prepares the crystallizable and biodegradable polyester or moldings thereof by a special secondary crystallization process has the advantage that the prepared molding products have high transparency and heat resistance and therefore have wide applications in field of packaging materials and the like.