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Contact SupplierIts extruder,cylinder and screw rods are made of quality alloy steel that have been nitriding.So 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 films like LDPE,HDPE,LLDPE/100%biodegradable material.It is widely applied to producing the packing bags for foodstuff,clothing,rubbish bag and vest ones.