Contact us for more information on ASACLEAN purging compounds and procedures.

ASACLEAN PF GRADE PURGING INSTRUCTIONS for Shutdown/Sealing/Start-up of High Heat Resins (Above 360°C, 680°F)

Shutdown & Seal

  1. Upon completion of production, purge the machine with ASACLEAN PF following the standard purging procedures.
  2. Leave barrel full of PF and begin dropping the temperatures to below 315°C (600°F).

ASACLEAN PF should not be left at temperatures above 370°C (700°F) for any period of time.

  1. If it takes longer than 30 minutes to drop temperatures below 315°C (600°F), displace the PF with a fresh barrel capacity, and continue to decrease temperatures. Once below 315°C (600°F), turn off the heats.

Start-up

  1. Turn on and set the heaters for the resin to be processed. Wait until the temperature of ASACLEAN PF is above 280°C (535°F). Allow adequate time for all of the ASACLEAN to plasticize, including material far from the thermocouple at the barrel wall. Extruder amps may spike if material is not completely plasticized.

ASACLEAN PF should not be left at temperatures above 370°C (700°F) for any period of time.

  1. Add a fresh barrel capacity of PF and extrude through the barrel using moderate backpressure (enough to keep the screw forward) for injection molding.
  2. Purge all of the PF from the extruder. If contaminated, repeat purging procedure with PF.
  3. For injection molding: Use low back pressure and screw speed until the next resin starts coming out from the nozzle, then increase to moderate back pressure and moderate screw speed until all of the ASACLEAN is displaced.

For extrusion: Use low screw speed until the next resin starts coming out from the die, then increase to moderate level until all of the ASACLEAN is displaced.

Begin production using the normal processing conditions for the next resin.