... oxide.300-550PP,PA,ABS+ ferrous powdersulphuric powderceramic powder400-600Functional machine pelletsPP,PA,ABS,PBT, etc+ anti-burning agent and other ... screw core shaft is made of 40CrNiMoA, and the screw thread components connect with the core shaft in an involute curve ... a power of 110KWtwin screw extruder SHJ-75A co-rotating parallel twin screw extruder/machine for color/filler masterbatch