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.

Trex Dave Heglas
Features

Decking Producer Becomes Supplier of Recycled Pellets

Composite decking manufacturer Trex expands from using recycled LLDPE internally to also supplying recycled pellets to others. It found the commercial recycled plastics market to be a journey full of both rewards and challenges.
Features

Extrusion Powerhouse Does It All

Tekni-Plex has evolved into a technically diverse global supplier of a wide range of extrusions for a host of markets, many of which are regulated.