... the plastic film as HDPE, LDPE and LLDPE,which is widely used for packing foodstuff, garment, textile, daily-use articles ... high quality alloy steel after fine finishing and nitrogenizing treatment, which has high hardness, strong resistance to corrosion, durable service ... coiling unit adopts pressure friction rewinding or center rewinding, which is driven by torque motor, with even and smooth main ...