... 30% CaCo3, recylced plastic material,etc co-rotating double screws with screw flight for plastic pellets DiameterΦ15mm-Φ350mmDesigningScrew structure and ... PVC products processing, especially for the production of PVC products with the output over 350Kg / h, because the parallel twin ... and mould, at the same time, it solved the technical problem of low foaming, high foaming, high filling, wear and ...