Its extruder cylinderand screw rods are made ofquality alloysteel that have been nitrized andprocessed in a precisionway.Hence it is sound in hardness,durable in corrosionresistance.Thespecially-designed screw is of sound qualityinplasticizing,which helps increase the productioncapacity. ltis applied to blowing the plastic films like low density polyeth-ylene(LDPE),high density polyethylene(HDPE) and linear lowdensity polyethylene(LLDPE). It is widely applied to producingthe packing bags for foodstuff, clothing.rubbish bag and vestones.