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Purging compound

purging compound

Purging compound, specifically commercial purging compound, is a product formulated specifically to clean thermoplastics molding machines and extruders. It typically contains a base resin, and other additives intended to clean the screw, barrel, and extruder die.

Purging compound is also used for color and material changes, removal of color and carbon deposits as well as cleaning hot runner mold.

Purposes of using Purging Compound

  • Cleaning Screws and Barrels: Provides more thorough cleaning.
  • Color and Material Changes:  Provides faster changeovers than using the traditional method of  running hundreds of pounds of virgin resin or regrind through the injection molding machines or extruders to purge out the previous color or material.
  • Removal of Carbon and Color Deposits: Removes stubborn deposits that ordinary processing resins cannot remove.
  • Prevent Unnecessary Screw-pulls: Reduce the time and effort required to overhaul the machine manually to clean.