PF Grade | Pre-Maintenance Injection Purging Instructions


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Asaclean® PF Grade Injection Purging Instructions for removal of high heat resins for pre-maintenance cleaning (Above 370ºC (700ºF))

  1. Upon completion of the production run, extrude the high heat resin from the machine, emptying the barrel. Clean the hopper and feed throat.
  2. Feed about 1 barrel capacity of Asaclean® PF into the hopper
  3. Increase screw speed to maximum safe level, while also increasing back pressure enough to keep the screw in the forward position. If resin contamination is still visible in the purge pile, repeat steps 2-3 until clean.
  4. Set all temperatures to 280ºC - 300ºC (535ºF - 570ºF) and continue purging under slow screw speed until temps are below 370ºC (700ºF).

    Note: Asaclean® PF Grade should not be left idle in the barrel for any period of time above 370ºC (700ºF).

  5. When all temperatures are below 370ºC (700ºF), stop the screw. Leave the barrel completely full of Asaclean®  PF to prevent oxygen from entering the barrel.
  6. Do not allow the temperatures in the injection molder to drop below 280ºC (535ºF) with Asaclean® PF in the barrel as overloading of the screw may occur when screw rotation resumes.
  7. When temperatures all reach 280ºC - 300ºC (535ºF - 570ºF) , begin feeding Asaclean® EX at a slow screw speed into the injection molder to remove deposits from the screw and barrel and to make it easier to pull the screw. Follow the standard "Asaclean® Purging Instructions for Pre-Maintenance Cleaning and Screw Pull." A nonglass-filled grade of Asaclean®, such as Asaclean® U, can be used to clean the screw and barrel, instead of the EX grade, but may not be as effective at removing stubborn deposits.

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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