BIODEGRADABLE PLASTIC MOLDED ARTICLE AND METHOD FOR PRODUCING THE SAME

• Main Author: ITO FUMIO
• Format: Patent
• Language: English
• Published: 15.01.2004
• Edition: 7
• 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; 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

PROBLEM TO BE SOLVED: To provide a method for producing a polylactate-based polymer molded article which is not deformed by a thermal treatment and is highly crystallized to improve a load-deflection temperature. SOLUTION: This method for producing the biodegradable plastic molded article comprises mixing a polylactate-based polymer with 5 to 50 wt. % of lamellar graphite and then molding the obtained composition. The method for producing the polylactate-based polymer molded article preferably further comprises a step of thermally treating the composition at a temperature which is higher than the glass transition point of the polylactate-based polymer and lower than its melting point. The biodegradable plastic molded article is produced by the above method. COPYRIGHT: (C)2004,JPO