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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Cleaning Recycled Material
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Try This Approach to Clean Up Your Recycled Material

CO2 can be used as a totally “green” solvent to remove many kinds of contamination in recycled plastics without the need for toxic solvents.
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Recyclable All-PE Pouches: Sustainable Opportunity for Film Extruders

Sustainability and the Circular Economy are both a challenge and an opportunity to flexible packaging producers. Recyclable pouches based on all-PE multilayer structures, utilizing new resins and perhaps techniques like MDO or biaxial orientation, appear to be major contenders against glass, metal, and multi-material film structures.