PT ZONE: Film Extrusion

PT Article Don't Be Left Out: Register for Extrusion Conference 2015
  The thing with most successful companies is that they get involved.  This is no different among plastics processors. More (+)
PT Article Novolex Buys Wisconsin Film & Bag
With the addition of WF&B, Novolex is now a $2 billion revenue company with over 5,200 employees and 37 manufacturing locations in North America, including two recycling facilities. More (+)


Clock is Ticking: Register for Extrusion 2015 by Friday and Save

  Have you registered yet for Plastics Technology’s upcoming Extrusion 2015 Conference?

OLED Elements Can Now Be Applied to Film

Create flexible, light-emitting surfaces.

Don’t Waste Any More Time: Register Now for the Extrusion 2015 Conference

Don’t miss out on the technical event of the year in extrusion.

World’s First Nine-Manifold Flat-Film Die Up and Running

Feedblock-free technology reportedly cuts thickness variations by two-thirds.

The Early Bird Catches the Worm…And the Discount at the Extrusion 2015 Conference

Have you registered yet for Plastics Technology’s upcoming Extrusion 2015 Conference?

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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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