Film Extrusion

Film is divided into two subcategories: cast, or flat film; and blown film. In the former, hot plastic is extruded through a flat, slit die onto a polished chill roll where it is quenched, pulled to a second set of rolls to cool the other side, then wound. In blown film, plastic is extruded into a cylindrical die, then inflated to form a bubble, which is ultimately cooled and collapsed. Films can be either single or multi-layer. Most are based on polyethylene. Bags are one primary example of film extrusions.

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All-PE Printed Collation Film Replaces Cardboard for Craft Beer Packs

Berry, Dow collaboration helps boost sales for beer maker while cutting costs and offering more in the way of sustainability, branding and shelf appeal.

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Nordson Expands Worldwide Capabilities for PPS Business Unit

Parent firm establishing Polymer Processing Systems group as global ‘go-to’ source for multiple components required by companies across the plastics manufacturing value chain.

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Extrusion: Biax Lines for ‘Bone-In’ Meat Bags

Equipment also comes with materials-selection and processing know how.