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Contact SupplierIts extruder,cylinder and screw rods are made of quality alloy steel that have been nitrized and processed in a precision way.Hence it is sound in hardness,durable in corrosion resistance.The specially-designed screw is of sound quality in plasticizing,which helps increase the production capacity.It is applied to blowing the plastic film like LDPE/HDPE/LLDPE.It is widely applied to producing the packing bags for foodstuff,clothing,rubbish bag and vest ones.