Purging compound

Details Purging compound Purging compound

1998-02-20

2000-02-08

Gulakowski, Randy

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

134 221, 134 2211, 134 2214, 134 2219, B08B 904, B08B 900, B08B 903

Patent

active

060224207

ABSTRACT:
An extruder is purged of residual thermoplastic resin by passing purging compound through the extruder, the purging compound being particles of fluoropolymer which are non-melt flowing at the temperature of operation of the extruder.

REFERENCES:
patent: 3125547 (1964-03-01), Blatz
patent: 4904735 (1990-02-01), Chapman, Jr. et al.
patent: 5064594 (1991-11-01), Priester et al.
patent: 5089200 (1992-02-01), Chapman, Jr. et al.
patent: 5266639 (1993-11-01), Chapman, Jr. et al.
patent: 5707569 (1998-01-01), Priester et al.
patent: 5710217 (1998-01-01), Blong et al.

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