Blown-Film Extrusion Asaclean® Purging Instructions


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Asaclean® Blown Film Purging Instructions

Notes Before Purging

  • Keep the barrel full of Asaclean® at all times to prevent oxygen from entering the barrel – excess oxygen will accelerate material decomposition and carbon formation.
  • Screens and dies may be left in place for purging with the Asaclean®. In most cases the restricted flow can aid in the mechanical cleaning process.
  • A bubble can normally be held while purging.

Purging Instructions

  1. Upon completion of the production run, continue running at production temperatures.
  2. Feed 2 system capacities (barrel + die) of the Asaclean® into the hopper.
  3. Run the Asaclean® through the system under normal processing conditions.
  4. Immediately follow the Asaclean® with the next production material.
  5. Continue running until no traces of Asaclean® can be observed in the bubble.
  6. Start production.

Tips

  • If the purge is known to be particularly difficult, increase the temperatures in all zones downstream from the extruder to 230°C – 260°C (445°F - 500°F) and/or pre-flush with a natural, heat stable resin that is at least as stiff as the production resin.
  • If heavy contamination is present, try Asaclean® NCF. 

Technical Questions?

To request detailed technical bulletins or technical support, contact us at Asahi Kasei Plastics North America Inc.

Phone: (800) 787-4348 / (973)257-1999
Fax: (973) 257-1011
Website: www.Asaclean.com
E-mail: sales@Asaclean.com

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