Continuous Screen Changer in Co-Extrusion

screen changer co-extrusion polymer melt filtration

The co-ex process relies heavily on unchanging flow and pressure conditions.

  • The operating mode of HITECH™ screen changers blends seamlessly into the co-extrusion process. The 120’ roll of filter screen moves at a steady, incremental rate so that fluctuations in melt pressure and melt temperature resulting from clogged screens are eliminated.
  • The physical dimensions of HITECH™ screen changers is another significant advantage in co-ex lines.  HITECH™ filters are significantly smaller than other types of screen changers, thereby resulting in shorter distances the melt has to travel to the feed block.
  • HITECH™ filters do not require any auxiliary power sources  such as cylinders or hydraulics to clutter up the densely packed space between the  extruder barrels. As a result, HITECH™ screen changers can be fitted into the smallest available spaces.
  • Using 120’ rolls of filter screen, the screen changers do not need to be accessed to change hot breaker plates and dirty screen packs or cylinders.