PT ZONE: Film Extrusion

EXTRUSION: Patented Seal For Hydraulic, Manual Screen Changers
Features springs that provide lock-up force for immediate seal protection. More (+)
PT Article Are You A Film or Sheet Processor? There’s Plenty to Learn at the Extrusion 2015 Conference
  Have you checked out Plastics Technology’s upcoming Extrusion 2015 Conference? More (+)


MOST RECENT CONTENT: Film Extrusion

Overcome the Challenges in Winding Flexible Packaging Film

Not all film webs are created equal. This creates challenges for both winder and operator. Here’s how to handle them.

Keep Extruder Barrels Aligned…And Production on Target

A misaligned barrel causes a lot of trouble. Laser alignment is being used now to keep things on the straight and narrow.

Involved in Extrusion? We've Got You Covered With New Conference

It’s all here at The Extrusion 2015 Conference in Charlotte, N.C., Nov. 2-3.

RKW Danafilms Changes Name To RKW North America

Company says the new name reflects its commitment to the North American market.

PE Film Market Analysis: Geomembrane Liners

Market to average 3.4% growth over the next two years.

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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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