PP yarn extrusion line is mainly composed of extruder, machine head, first stretching roller, heating plate, second stretching roller, winder and electrical control part. The extruder is mainly composed of a screw, a barrel, a hopper, a reducer and a drive motor. The machine head consists of three parts: three-way, filter net, filter plate and lip. http://www.circularloomcn.com/pp-woven-bag-production-line/pp-yarn-extrusion-line/