Sughrue, Mion, Zinn, Macpeak & Seas
Process for producing biaxially drawn plastic bottles having excellent heat resistance
 A process for producing biaxially drawn plastic bottles having excellent heat resistance and an apparatus therefor. The process comprises a step of biaxially drawing and free blow-molding the preformed article to obtain a secondary molded article thereof, a step of heating the secondary molded article by inserting it for 0.3 to 5 seconds in the infrared rays emitted from an infrared-ray radiation member that has a substantially planar radiation surface having a height larger than that of the secondary molded article in the direction of height and having a surface temperature of from 350.degree. C. to 1000.degree. C., in order to obtain a tertiary product thereof that is shrunk, and a step for blow-molding the tertiary product that is in a heated state in a metal mold to obtain a final molded article. A single metal mold is used for blow-molding to shorten the time occupied by the metal mold and to produce the bottles having excellent heat resistance maintaining high productivity. 
Toyo Seikan Kaisha, Ltd.
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Hiroo Hideo Setsuko Yoshitsugu Nobuyuki Kimio Kenji
Ikegami Kurashima Iida Maruhashi Kato Takeuchi Matsuno