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.

Knowledge Center

Insights into plastics technologies from industry experts.

What's New in Extrusion at K 2019
Article

K 2019 Preview: Green's the Theme in Extrusion & Compounding

Themes of sustainability and the Circular Economy will be visible at the booths of many suppliers of extrusion and compounding equipment—film, in particular.
Blog

'First' PBTs for Extrusion of Profiles and Thermoforming

BASF will showcase the new Ultradur PBT portfolio extensions at K 2019.
New Product Announcements
Product

Extrusion: 'Unique' Digital Services for Film Processors

Four-module platform aims at transparent, faster and more efficient service for biax-film processors.