PROCESS FOR FORMING CONTERNER OF ACRYLONIRILE POLYMERS BY BIAXIAL-ORIENTATION BLOW-MOLDING PREFORM .

摘要

A PROCESS FOR FORMING A CONTAINER OF ACRYLONITRILE POLYMERS BY BIAXIAL-ORIENTATION BLOW- MOLDING A PREFORM.A PREFORM OF THERMOPLASTIC RESIN MAINLY COMPRISING ACRYLONITRILE POLYMERS IS IRRADIATED WITH AN ELECTRON BEAM OR A GAMMA-RAY.IMMEDIATELY AFTER THE IRRADIATION, THE PREFORMS IS HEATED AT 40°C OR HIGHER SO AS TO REDUCE UNPOLYMERIZED ACRYLONITRILE MONOMER IN THE PREFORM TO 0.1 PPM OR LESS. THEN, THE PREFORM IS BIAXIAL-ORIENTATION BLOW-MOLDED TO FORM A CONTAINER. (FIG. 1)