HEAT RESISTANT PET CONTAINER AND ITS PRODUCTION METHOD

• Main Author: NAKAZATO SHINSAKU
• Format: Patent
• Language: English
• Published: 15.01.2003
• Edition: 7
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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; 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a heat resistant PET container which is superior in heat resistant and shockproof characteristics by laminating PET having different crystalline conditions. SOLUTION: The main body of this container is made of a laminated body containing at least an amorphous PET and thermal crystallized crystalline PET. The main body is made of a two-layer laminated body having an amorphous PET inside layer and a thermal crystallized crystalline PET outside layer. In molding the container, a laminated sheet where each amorphous PET and crystalline PET is in an amorphous condition is placed with the crystalline PET on the outer side of the container to be thermoformed at a temperature below the crystallization temperature of the crystalline PET, and the molded container is heated to the crystallization temperature of the crystalline PET for thermally crystallizing the crystalline PET.