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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melt temperature probe
Features

How to Collect and Interpret Process Data in Extrusion, Part 2

In this second of three installments, the focus is on the crucial element of melt temperature.
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.
New Product Announcements
New Product

Extrusion: Real-Time Roughness Scanner for Polymer Webs

Unit automatically scans for the web’s microtopography across its full width and calculates the standard roughness parameters.