Condensation injection molding process for producing bottle pref

Details Condensation injection molding process for producing bottle pref Condensation injection molding process for producing bottle pref

1996-02-14

1997-08-12

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528272, 528298, 528301, 528302, 528307, 528308, 5283086, 525437, 264512, 264513, 264516, C08J 300

Patent

active

056567197

ABSTRACT:
A process for producing bottle preforms from the melt of polyethylene terephthalate and/or its copolyesters, includes selectively introducing an inert gas into the continuous flow or partial flow of the polyester melt from a poly-condensation having an intrinsic viscosity between 0.5 and 0.75 dl/g, subsequently bringing the melt to an acetaldehyde content below 10 ppm in a melt after-condensation reactor and to an intrinsic viscosity of 0.75 to 0.95 dl/g and thereafter guiding the melt into an injection molding tool and processing same.

REFERENCES:
patent: 4223128 (1980-09-01), Halek et al.
Furst, A. "Devolatilizing in the course of Poly-Condensation." Proceedings to the Devolatilizing in the Course of Producing and Processing Plastci Materials. pp. 187 and 192 (1992).
Merlini, M.S. "Industtrial Processes for Producing Bi-Oriented Hollow Bodies." Plastics, vol. 3, pp. 17-20 (1983).

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