Method and apparatus for eliminating gel contained in polymer

Details Method and apparatus for eliminating gel contained in polymer Method and apparatus for eliminating gel contained in polymer

1996-05-16

1999-01-05

Soohoo, Tony G.

Agitating

Stirrer within stationary mixing chamber

Rotatable stirrer

366323, 366 88, B01F 708

Patent

active

058554327

ABSTRACT:
A method of eliminating gel contained in polymer, by efficiently plasticizing and melting the polymer supplied into a barrel with the stress in a rotor reduced, and next kneading the polymer with a rise in temperature of the polymer suppressed and a residence time of the polymer in the barrel increased. A continuous kneader for realizing this method is also provided. The gel eliminating method includes the first step of plasticizing and melting the polymer by using a first rotor having a given number of wings; and the second step of kneading the polymer after the first step by using a second rotor having a given number of wings fewer than the number of wings of the first rotor, so as to suppress a rise in temperature of the polymer and increase the volume of a kneading chamber to thereby increase a time period of residence of the polymer in the kneading chamber. The continuous kneader includes a rotor having the first rotor and the second rotor.

REFERENCES:
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patent: 4534652 (1985-08-01), Stade
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patent: 5499870 (1996-03-01), Rockstedt
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Derwent Abstract of JP 8-108429 A, patent publication published on Apr. 30, 1996.

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