Method of producing extrusion grade poly(arylene sulfide)

Details Method of producing extrusion grade poly(arylene sulfide) Method of producing extrusion grade poly(arylene sulfide)

1982-08-09

1985-02-19

Henderson, Christopher A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

210767, 264176F, 528481, C08J 500, C08G 7502

Patent

active

045007063

ABSTRACT:
A method of producing poly(arylene sulfide) resin suitable for the commercial production of fibers. The method includes the two stage melt filtration of a suitable poly(arylene sulfide) polymer, e.g., poly(p-phenylene sulfide), through a primary filter having an absolute micron rating of no more than about 125 microns, and through a secondary filter having a maximum absolute micron rating of about 80 or a substantially equivalent filter capacity. Also disclosed are various forms of apparatus for performing the method. In one form the apparatus employs a depth type filter of metallurgically bonded micronic size stainless steel fibers as the primary filter and one or more edge sealed screen combinations each containing one 325 mesh screen as the secondary filter. A secondary filter comprising a mesh screen and a quantity of suitable sand is also disclosed.

REFERENCES:
patent: 2883261 (1959-04-01), McGeorge, Jr.
patent: 3071808 (1963-01-01), MacKinnon
patent: 3480706 (1969-11-01), Carpenter et al.
patent: 3639557 (1972-02-01), Pfannenschimd
patent: 3938924 (1976-02-01), Abella et al.
patent: 4077880 (1978-03-01), Lorenz et al.
Flow Systems: Filter Media, Fluid Dynamics, Brunswick Corporation, 1978.

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