Process for thermal treatment of polyester chips in the solid st

Details Process for thermal treatment of polyester chips in the solid st Process for thermal treatment of polyester chips in the solid st

1995-08-30

1996-07-16

Acquah, Samuel A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528298, 528300, 528301, 528302, 528307, 528308, 5283082, 5283086, 528483, 528452, 528502, 528503, C08F 600

Patent

active

055368107

ABSTRACT:
Process for thermal solid-state treatment of chips of saturated polyester, where the chips are crystallized immediately before the thermal treatment and the thermal treatment is carried out in a static bed at a chip temperature that is equal to TE (1 .mu.m) .+-.2.degree. C., where TE (1 .mu.m) is the temperature at which a measurement probe placed on a crystallized chip is lowered by 1 .mu.m under defined conditions in a thermomechanical analysis. The crystallization preferably takes place in a fluidized bed at three different specified temperatures.

REFERENCES:
patent: 3405098 (1968-10-01), Heighton et al.
patent: 3728309 (1973-04-01), Maxion
patent: 4064112 (1977-12-01), Rothe et al.
patent: 4161578 (1979-07-01), Herron
patent: 4223128 (1980-09-01), Halek et al.
patent: 4238593 (1980-12-01), Duh
patent: 4532319 (1985-07-01), Wendling
patent: 5292865 (1994-03-01), Kerpes et al.

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