We already have co-rotation and counter-rotation reaction extruders .The co-rotation extruder is used for processing TPE,TPV and other thermoplastic elastomers, maleic anhydride graft and CPVC. The counter-rotation reaction extruder is used for reaction extrusion of high viscosity materials, vent extrusion of high strength fiber materials, degassing extrusion of rubber and plastic new materials, etc.