Patent ID: 6068922
Filing Date: 2000-05-30
Classification: B29C,B29K,Y10T

Abstract:
Pellets of a uniform composition comprising 15 to 99 weight percent polymer and 1 to 85 weight percent fibrillated aramid pulp fibers made by a process comprising the steps of:a) providing fibrillated aramid pulp fibers having a moisture content of 20 to 85 weight percent volatile liquid based on the weight of the fibers;b) continuously introducing the moist fibrillated aramid pulp fibers at a substantially constant rate into an extruder;c) applying heat to the fibers in the extruder to evaporate volatile liquid from the fibers;d) subjecting the heated fibers to shear forces in the extruder before introduction of the polymer;e) continuously introducing the polymer into the extruder downstream from introduction of the fibers;f) mixing the polymer and the fibers in the extruder to yield a substantially uniform composition, andg) expelling the composition from the extruder.