POLYETHYLENE NAPHTHALATE RESIN MOLDED ARTICLE AND PRODUCTION THEREOF

PROBLEM TO BE SOLVED: To produce a resin molded article that will not develop crazing when stored in ethyl acetate at a specified temperature for a specified period of time by using a polyester resin composed of a naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main gl...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO MASAKI, ITO YUMI, HASHIMURA TETSUTARO
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING GENERAL PROCESSES OF COMPOUNDING HANDLING THIN OR FILAMENTARY MATERIAL 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 PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING 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:	PROBLEM TO BE SOLVED: To produce a resin molded article that will not develop crazing when stored in ethyl acetate at a specified temperature for a specified period of time by using a polyester resin composed of a naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main glycol component. SOLUTION: A polyethylene naphthalate(PEN) resin molded article comprises a polyester resin composed of a naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main glycol component and will not develop crazing when stored in ethyl acetate at 40 deg.C for 12 hr. For example, the PEN resin molded article is produced by feeding a PEN resin into an injection molding machine to form a preform and heat treating a molded article produced by e.g. blow molding the preform after heating, preferably at a temperature of 50-120 deg.C for not less than 0.1 hr. Alternatively, it is preferable to produce a PEN resin molded article at a mold temperature of 50-120 deg.C. The PEN resin molded article is useful as a container for storing the contents including an organic solvent such as a bottle for nail color or the like.