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Cross Contamination (Extrusion Hint)

Modified on Monday, 02 February 2015 01:07 PM by mpieler Categorized as Extrusion Hints
Cross Contamination (Extrusion Hint)
Vol. 27 #1, March 2000

Screws should be removed from the extruder for cleaning when changing polymers, to avoid cross contamination, especially for R&D tests. Elevate the barrel temperatures to make sure all residual polymer left in the screw is melted to make screw removal easier. Also clean the barrels with a long rod brush before installing the screw, whether or not the same or a new screw is used.

-Bill Corcoran, Dupont Co.

See also:
  • Removing polymer melt

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