Process for forming container of acrylonitrile polymers by...

Details Process for forming container of acrylonitrile polymers by... Process for forming container of acrylonitrile polymers by...

B - Operations, Transporting

29

C

204/91.58

B29C 49/00 (2006.01) B29B 13/08 (2006.01) B29C 35/08 (2006.01)

Patent

CA 1338983

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 preform 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.

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