American Maplan Corp., McPherson, Kan., is developing a new approach to compounding highly fi lled composites, using two planetaryroller extruders in tandem.

American Maplan Corp., McPherson, Kan., is developing a new approach to compounding highly fi lled composites, using two planetaryroller extruders in tandem. The fi rst combines polymer and fi llers; the second acts as a heat exchanger to control temperature precisely in the discharge stage. Development trials have been going on for the past year, involving natural fi bers in polyolefi ns and PVC. Dual planetaryroller extruders have been used before only for precise temperature control in PVC film calendering. More typically, a planetary extruder is paired with a short single-screw discharge extruder or a counter-rotating twin-screw. Tel: (620) 241-6843 . www.maplan.com

American Maplan
823 South 81 Bypass McPherson, KS 67460
Phone (620) 241-6843 Fax (620) 241-2142