Plastic and nonmetallic article shaping or treating: processes – With step of cleaning – polishing – or preconditioning...
Patent
1977-06-29
1978-11-07
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With step of cleaning, polishing, or preconditioning...
264169, 264176F, D01D 110
Patent
active
041246667
ABSTRACT:
The invention relates to a method of keeping nozzle bodies or breaker plates clean during extrusion of polymer which can be shaped from the melt which comprises preventing the formation of deposits near the nozzle orifices by gassing these orifices at the point of extrusion of the melt, said gas consisting entirely or partly of vapors of substances which have a depolymerizing action on the deposits formed from the melt at the edge of the nozzle orifice.
REFERENCES:
patent: 3436789 (1969-04-01), Hays
patent: 3462522 (1969-08-01), Clark et al.
patent: 3502757 (1970-03-01), Spencer
patent: 3814559 (1974-06-01), Akers et al.
patent: 3907957 (1975-09-01), Shaffer
patent: 3975475 (1976-08-01), Zoley
Jaschke Artur
Sandhu Surinder S.
Schmidt Jens
Simon Hans-Jurgen
Wilhelm Gerd
Bayer Aktiengesellschaft
Woo Jay H.
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