Abstract: Statistic analysis was applied on the flow field of two configurations of kneading blocks. Based on the flow field simulation of the two configurations in different rotational speeds, simulated the maximum shear rate distribution, RTD and strain distribution. Meanwhile an experiment was made to validate the analysis result. Results showed that the dispersive configuration made the tensile strength of PP/PET blend better. The diameters of PET particles affect the impact strength in the PP/PET blend. Too small diameters of PET particles made low impact strength.

Key words: meshing twin screw extruder, numerical analysis, screw configuration, polypropylene, polyethylene terephthalate, blend