Method of treating hollow articles, in particular polyethylene t

Details Method of treating hollow articles, in particular polyethylene t Method of treating hollow articles, in particular polyethylene t

1986-11-12

1988-08-16

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264 83, 264532, 264234, 264344, 525383, 525437, 5283082, B29C 7100, C08J 712, C08J 702

Patent

active

047643234

ABSTRACT:
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 reduces the acetaldehyde concentration in the head of the treated bottles or in the bottles obtained from the treated preforms by stretch-blowing, and also reduces the permeability of gases through the bottle walls.

REFERENCES:
patent: 4260567 (1981-04-01), Poppe et al.

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