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Films play a significant role in packaging industry. Polymers such as polyethylene, polypropylene, polyvinyl chloride (PVC), polyester and EVOH are usually used as film materials in the packaging industry. Films are usually manufactured by extrusion process and are in various forms depending upon their end use. Cast films, blown films, shrink films, oriented films and co-extruded films are some of the most important variations of films. Plastics packaging is one of the most widely used techniques of packaging in the world.
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