Customized PP Yarn Extrusion Line This machine can adopt 100% recycled materials, high percentage mixed master batch in powder or granules to make pp yarn.38CrMoAlA alloy steel is adopted for making screw and barrel which is designed by ourselves and manufactured by a well-known plant in Zhoushan City; the inner cavity of die is plated with hard chrome, the die mouth adopts 38CrMoAlA alloy...