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