... .used with high effective vent type single screw or co-rotation parallel twin screw Extrusion line for pigment palletizing:This line is one ... of our leading products. It is used with high effective vent type single screw ... parallel twin screw extruders. The special screw cab be applicable to PP, PA, PIST, ABS, PPS, PC, PET, PMMA etc. for master-batch ...