ORGANIC FIBER-REINFORCED POLYLACTIC ACID RESIN COMPOSITION AND MOLDED ARTICLE

• Main Author: YOSHIHARA NORI
• Format: Patent
• Language: English
• Published: 12.04.2007
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; 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; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPINNING; TEXTILES; 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 polylactic acid resin composition that exhibits stabilized qualities with high strength/rigidity and a high deflection temperature under load and is excellent in moldability, mechanical properties, heat resistance, recyclability and reduction of environmental loads. SOLUTION: The polyester fiber-reinforced polylactic acid resin composition comprises 100 pts.mass of (A) polylactic acid and/or a polylactic acid copolymer containing at least 80 mol% of lactic acid, 1-100 pts.mass of (B) at least one crystal nucleating agent selected from among clay, kaolin, talc, wollastonite and kenaf, 0.05-3 pts.mass of (C) a higher fatty acid salt and/or an ester, and 5-100 pts.mass of (D) an organic fiber having a melting point of 245°C or higher. In a preferred embodiment, a composite fiber comprising a core composed of polyethylene terephthalate having a melting point of 245°C or higher and a sheath composed of a resin having a melting point of 100-200°C is used as the organic fiber (D). A molded article having a relative crystallinity of at least 80% is obtained by molding the resin composition. COPYRIGHT: (C)2007,JPO&INPIT