Studies On Influence Of Intensive Shear And Disperse Of Multi-stage-mill Mixer On Rheological Performance And Dispersing Of Polyolefin And Polyolefin/CaCO₃ Composites

Ultra-fine filling particles are widely used with the advance of filling modification in polymer industry. Lots of researches and productive practices approved that in the same filling conditions, the modification of the ultra-fine filler is better and more effective than the common ones. As to the dispersion of such ultra-fine fillers in the polymer materials, dispersion facility is an important factor because the Ultra-fine particles are more difficult to disperse in polymer matrix than common ones. So it is meaningful to develop efficientequipments.Some newly developed mixing devices are just the modification of existingequipments (such as the mixing roll, ball grinder, extruder), and have some limitations and unreliabilities. So multi-stage-mill mixer was developed by combining the merits of traditional mill and mixer with static and dynamicpins in this work. It includes two major parts: mill components located in the front section of mixer and teeth ones in the behind section. The former can afford intensive shear and the latter can effectively distribute and disperse the melt after passing mills.