MANUFACTURE OF LIGHT TRANSMITTING RESIN MOLDED ITEM

• Main Authors: TAKAHASHI MAKOTO, OOUCHI SHIGEO
• Format: Patent
• Language: English
• Published: 22.08.1984
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To obtain easily and inexpensively the titled molded item whose appearance assumes beautiful metallic, woodgrain or the like appearance, by integrally injection molding a light transmitting resin on a transparent film on which a light nontransmitting resin paint is printed except parts of the transparent film where letters, symbols or the like are present. CONSTITUTION:A light nontransmitting resin paint 3 is printed on the main surface of a transparent resin film (e.g. an acrylate resin film, etc.) 1 having a thickness on the order of 0.15-0.4mm. except parts 2 having letters, symbols, etc., and after the paint 3 is dried, a transparent protective film (e.g. a hard PVC film, etc.) 4 having a thickness on the order of 0.05-0.1mm. is laminated on the printed surface. The resulting laminated film 5 is heat-treated (for example at 100 deg.C for 1min) by a heater, and then is molded by the vacuum molding method or air-pressure forming method to have for example a shape corresponding to a stamper of the cavity of an injection mold 6. Then to the thus obtained molded item is injection molded a light transmitting injection molding resin 11 from the side of the transparent resin film 1 to obtain the intended item 12.