There are three types: single screw method, a twin-screw method and secret love Method.
   
      Single screw method: Banliao After materials are mixed, extruded from a single screw extruder strand pelletizing, the concentration of carbon black is generally 18-20%, backward technology, poor environmental conditions, production site, is being phased out process, do not rule out Some small start-ups processing factories still use the same method.
        

    Twin-screw method: After mixing the material Banliao by a twin-screw extruder brace or water ring granulation, since a twin-screw kneading machine itself limited capacity, the concentration of carbon black masterbatch is generally 25-32%.
        

   Mixing method: Use Banliao the material mixing, kneading mixer was added, and then fed by the feeder twin screw extruder, the water ring or underwater pelletizing, the concentration of carbon black masterbatch generally 40- forty five%.