Process for metering color concentrates to thermoplastic polymer

Details Process for metering color concentrates to thermoplastic polymer Process for metering color concentrates to thermoplastic polymer

1988-04-25

1989-07-18

Simone, Timothy F.

Agitating

Rubber or heavy plastic working

With specified feed means

264 75, 264138, 264140, 264349, 425145, 425147, 366 79, 366 84, 366150, 366158, B28C 704, B29B 110, B29B 500

Patent

active

048489158

ABSTRACT:
Continuous strands of color concentrate are metered into the feed zone of a screw-melter polymer extruder where they are cut into pellets by the shearing action of the flights of a rotating screw against the extruder housing. These pellets are mixed within the extruder with a thermoplastic polymer to be colored and this mixture is then melted and extruded into a useful article, for example, a fiber for textile or carpeting end-use.
Additionally, color concentrates can be first formed into continuous strands and stored conveniently on a spool for subsequent metering into the polymer extruder.

REFERENCES:
patent: 2947030 (1960-08-01), Varn
patent: 3304282 (1967-02-01), Cadus et al.
patent: 3732345 (1973-05-01), Amos et al.
patent: 4101613 (1978-07-01), Norwood
patent: 4175870 (1979-11-01), Warzel
patent: 4353851 (1982-10-01), Godfrey et al.
patent: 4728475 (1988-03-01), Beck
patent: 4770539 (1988-09-01), Heathe

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