High performance cooling element

A method for cooling, the method comprising:

• (a) receiving, by a unidirectional cooling element, a flow of a molten film tube;
• and
• (b) cooling, by the unidirectional cooling element, the flow of molten film tube, wherein the unidirectional cooling element comprises a unidirectional cooling interface having a cooling gas deflector operable for expelling a cooling gas in a path with the flow of the molten film tube toward an exit tip, wherein a distance between the unidirectional cooling interface including the exit tip define a minimum gap between the blow of the molten film tube and the unidirectional cooling interface;
• (c) cooling by a divergent cooling element for receiving the flow of the molten film tube, the divergent cooling element comprising a divergent cooling interface operable for expelling a cooling gas (i) in a path opposing the flow of the molten film tube toward a first exit gap defined by the flow of the molten film tube and a first exit tip, and (ii) in a path with the flow of the molten film tube toward a second exit gap defined by the flow of the molten film tube and a second exit tip, wherein at least one of the first exit gap and the second exit gap define a minimum gap between the divergent cooling interface and the flow of the molten film tube;
• and
• (d) cooling by at least one of a single flow air ring, a dual flow air ring, a triple flow air ring, and a multiple flow air ring stacked adjacent the divergent cooling element.