Continuous process for the production of polyester for food pack

Details Continuous process for the production of polyester for food pack Continuous process for the production of polyester for food pack

1994-03-16

1994-11-08

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

5283082, 5283083, 5283088, 5283091, 264 5, C08G 6300, C08G 6316

Patent

active

053628446

ABSTRACT:
A continuous process for the production of low-modified polyethylene terephthalate for food packaging in which, while maintaining specific processing conditions, a precondensate is polycondensed in the melt, the polycondensate is pelletized, and the pellets are first hardened, then crystallized and subjected to dealdehydization. The process results in a polyester having a very low acetaldehyde content.

REFERENCES:
patent: 4205157 (1980-05-01), Duh
patent: 4260721 (1981-04-01), Ford et al.
patent: 4455417 (1984-06-01), Vanderkooi, Jr. et al.
patent: 5270444 (1993-12-01), Shiraki et al.

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