PT ZONE: Film Extrusion

PT Article Get Ready for the Extrusion '15 Conference
Two-day event slated for Nov. 2-3 in Charlotte. More (+)
PT Article Bag Bans Embolden Activists
Whether or not it was the goal initially, California’s statewide ban of plastic bags has given environmental groups the confidence and momentum to broaden their target range for regulation. More (+)


MOST RECENT CONTENT: Film Extrusion

New Name, Brand Structure for Hilex Poly

Film and bagmaker and three sister companies will now be brands under Novolex umbrella.

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.

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.

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.

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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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