The plastics industry depends on nitrogen gas for a variety of injection molding and blown film extrusion processes.
Nitrogen is used in injection molding to prevent carburization of the screw and to purge the pellet hopper.
During the gas assist injection moulding process, nitrogen gas is injected into the mould in specific areas to displace material and reduce shrinkage.
Blown film extrusion depends on nitrogen gas to prevent discoloration materials affected by the presence of oxygen.