Purging Agents

Enge Plas supplies a mechanical purging agent that enables the safe, effective and efficient cleaning of plastics processing equipment.

  • Metal surfaces are cleaned using a unique scrubbing effect. The material is not abrasive to screw, barrel, die etc.
  • Particularly useful when changing colour, polymer, or when screw and barrel are carbonized. Enables rapid purging of the previous colour and/or polymer, so that machine downtime and loss of expensive polymer is minimized.
  • Suitable for injection moulding, extrusion and blow moulding processes.
  • Cost effective, as only a small amount is required, usually at 20% add rate to the polymer.

Contact us to learn more about Purging Agents


How It Works

This granular material is blended in with a small amount of the polymer that you are using and fed into a starved screw/barrel. The blended material is processed through your equipment at similar temperatures and revs to typical run conditions for the carrier polymer. The material softens slightly, but does not melt, and thoroughly loosens carbonized and degraded resin, allowing the polymer to flush out the system.

This makes it particularly useful for:

  • Cleaning colour from your equipment
  • Cleaning polymer from your equipment
  • Removing carbon build-up and black specks
  • Regular preventative maintenance
  • Before manual cleaning

Various Grades

  • For injection moulding (except where openings are less than 1.5mm)
  • For extrusion, blow moulding, and injection moulding with openings less than 1.5mm
  • For hot runner systems with a minimum clearance of 0.75mm
  • Used in unblended form (i.e. at 100%) in extrusion and compounding processes. Provides a gentle scrubbing effect to the screw and barrel and removes build up of carbonised material. It softens but does not melt, therefore it provides a scrubbing effect – it does not scratch or wear the screw or barrel.