Screen packs for reducing gels in polypropylene copolymers

Details Screen packs for reducing gels in polypropylene copolymers Screen packs for reducing gels in polypropylene copolymers

1996-12-03

1998-03-24

Therkorn, Ernest G.

Liquid purification or separation

Processes

Separating

264169, 26421143, 210806, B01D 3700

Patent

active

057308853

ABSTRACT:
The present invention teaches a method for reducing the number and size of polymeric gels in a polypropylene blend by filtering the blend through multiple filter screens during the extrusion of the blend.

REFERENCES:
patent: 1818549 (1931-08-01), Furman
patent: 3125107 (1964-03-01), Wood
patent: 3154610 (1964-10-01), Denyes
patent: 3215760 (1965-11-01), Grace
patent: 3233288 (1966-02-01), Straus
patent: 4175147 (1979-11-01), Bollen
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patent: 4334783 (1982-06-01), Suzaka
patent: 4661249 (1987-04-01), Langley
patent: 4822547 (1989-04-01), Derrick
patent: 5076988 (1991-12-01), Rifi
patent: 5458474 (1995-10-01), Neubaurer et al.
Manfred H. Pahl, Filtration of Polymer Melt, 1981, pp. 1-7.
Editor: Detlef Gneub, Filtration of Plastics Melts Melts, 1988, pp. 2, 14-15.
Product Bulletin, Anderson Wire Works, Inc. 1 PA CE (undated).

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