Method for processing substances e.g. additives, in planetary roller extruder utilized for manufacturing e.g. profiles, involves mixing auxiliary melt flow with main melt flow after mixing and dispersing mixing portion

摘要

The method involves producing a melt flow and separating the melt flow into a main melt flow and a smaller auxiliary melt flow. A portion is diverged from the main flow and separated in a branch extruder. A mixing portion in a main extruder is mixed and dispersed in the main flow. Another mixing portion in an auxiliary extruder is mixed and dispersed in the auxiliary flow. Mixing temperature in the auxiliary flow is of 10 degree Celsius above melt temperature of the main flow. The auxiliary flow is mixed with the main flow after mixing and dispersing the latter mixing portion.