METHOD FOR PROCESSING CONTAMINATED POLYCONDENSATE MATERIALS

摘要

The invention relates to a method for processing contaminated polycondensate materials, especially polyethylene terephthalate (PET). The inventive method is characterized by removing a surface layer of the polycondensate material to be processed before the material is melted and filtered in the melt. Optionally, said method may be followed by a step for increasing the intrinsic viscosity by melt phase or solid phase polycondensation.