Method of treating hollow articles, in particular...

Details Method of treating hollow articles, in particular... Method of treating hollow articles, in particular...

B - Operations, Transporting

29

C

18/1185

B29C 71/00 (2006.01) B29B 13/00 (2006.01) B29C 49/00 (2006.01) C08G 63/90 (2006.01)

Patent

CA 1286870

ABSTRACT OF THE DISCLOSURE A method of treating PET preforms and bottles consists of subjecting the preforms or the bottles to a carbon dioxide atmosphere at a higher temperature than the critical temperature of carbon dioxide, a higher pressure than ambient pressure, and for a set time period. The treatment greatly reduces both the acetaldehyde concentration in the head of the treated bottles or in the bottles obtained from said treated preforms by stretch-blowing, and permeability of gases through the bottle walls.

523034

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