Method and apparatus for continuously crystallizing polyester ma

Details Method and apparatus for continuously crystallizing polyester ma Method and apparatus for continuously crystallizing polyester ma

1989-12-22

1992-02-25

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With apparatus using centrifugal force

34 57A, 34 57B, F26B 1700

Patent

active

050901346

ABSTRACT:
Polyester granulates, in particular slowly crystallizing adhesive copolyesters are crystallized in two fluidized beds (1, 2) arranged in series and are guided into an impact apparatus (3) for the subsequent comminution of the small agglomerates. The first fluidized bed (1) is an effervescent fluidized layer with mixing characteristic and the second fluidized bed (2) is a flow bed with a plug flow characteristic. The second fluidized bed (2) ensures an adequate treatment duration in order to crystallize the amorphous grains of granulate which remain after the first fluidized bed (1).

REFERENCES:
patent: 4161578 (1979-07-01), Herron
patent: 4223128 (1980-09-01), Halek et al.

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