FOAM RESIN CONTAINER AND METHOD FOR MOLDING THE SAME

• Main Authors: NAKAZATO SHINSAKU, YOKOYAMA TOSHIYUKI
• Format: Patent
• Language: English
• Published: 14.11.2000
• 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; 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 obtain a reinforced container with heat resistant and heat insulating properties by pressure-welding an opening rim of a packaging container molded of a foam sheet of a polyethylene terephthalate resin to be in a non- foaming state. SOLUTION: After a foaming ester resin sheet material is heated to a temperature suitable for fabrication and softened, the sheet material is supplied to a mold to form into a container 1 having a predetermined shape. At the same time, an opening rim 2 or a corner on a bottom part of the container is contact- bonded and fused by a heater provided at the rim part or the bottom part to crush bubbles of a foam, thereby forming a non-foaming reinforced portion 2a at the opening rim or the corner of the bottom of the foam container.