Abstract
The properties of polymer films cannot be separated from the process by which they are made. The stress and strain history imposed on the polymer as it is melted, extruded through the die, drawn to its final shape and quenched affects the orientation, crystallinity and morphology of the film. These in turn impact the mechanical, optical, barrier and other film properties. Three examples involving blown film are presented that illustrate the importance of processing on flexible packaging films:
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