... + 30% CaCo3, recylced plastic material,etc co-rotating double screws with screw flight for plastic pellets DiameterΦ15mm-Φ350mmDesigningScrew ... ,it solved the technical problem of low foaming, high foaming,high filling, wear and corrosion.Nitride Case Depth0.5mm- ... , it solved the technical problem of low foaming, high foaming, high filling, wear and corrosion.International Standard Packing: Exhibition ...