PT ZONE: Film Extrusion

New Extrusion Equipment Supplier Combines U.S. Management with Chinese Production
Starting up in 2011, UWay Extrusion has begun its commercial push this year, with plans to exhibit at NPE2015 next March. More (+)
Dynisco Extends Machinery Directive Compliance to 4-20mA Pressure Sensors
Billed as 'ideal choice. for extrusion OEMs and processors that need to comply with the European standard. More (+)


MOST RECENT CONTENT: Film Extrusion

Bloomer Expands to Barrier Blown Film

Custom processor of cast embossed film buy barrier blown film leader Optimum.

BLOWN FILM: Foam Specific Layers In Coex Blown Film

Macro applies technology originally developed for cast to blown film.

SPE Extrusion Group Annnounces Two New Scholarships

Division scholarships honor long-time members Steward, Gould

MATERIALS: Conductive Extrusion Compounds for ESD

Available in PVC, TPU, TPE, PC, PE, PP, PS, and ABS.

RECYCLING: High-Output Melt Filters for Recycling and Film/Sheet

Model ERF 500 is designed for max. throughput of more than 11,000 lb/hr.

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OVERVIEW:
Film Extrusion

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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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