PT ZONE: Film Extrusion

EXTRUSION: Feedblock Tuning Insert Lets Processors Keep Running
They are also said to allow for greater precision in layer-to-layer thickness control. More (+)
HEATING/COOLING: Novel Heaters for Injection Nozzles, Extrusion Melt Pipes
Plasma-sprayed coating with insulating cover provides faster, more uniform heating. More (+)


A Better Way to Balance Die Flow

Use temperature adjustments before making any mechanical tweaks.

Compounding PLA on Twin-Screws: What Testing Reveals

Twin-screw extrusion is the preferred method for compounding PLA and other biopolymers. But processing PLA is complicated because it’s sensitive to heat and shear. It’s also prone to hydrolytic degradation if moisture is present in molten PLA. Here’s what one machine builder’s trials revealed.

Back to Its Roots in Film Extrusion

After drydocking its film extrusion business in '99, converter goes back to its roots with upstart sister company.

The Power of Numbers: Time to Step Up to Five Layers

Five-layer technology can provide processors with more productivity and greater flexibility to produce a wider range of products from a single line.

Are You Ready to Export Your Film?

The shale gas boom could provide unprecedented opportunities for film processors.

View More Content in This Zone  |  RSSRSS  |  AtomAtom

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.

more (+)

» Blending & Dosing

Is dosing good enough? Do I need a Blender? Let Maguire walk you through the basics, process integration and more.


» Plastics Conveying

Watch video, download datasheets and more in the Plastics Conveying Knowledge Center.

» Plastics Drying

Novatec shares their knowledge of dryers and drying techniques.

Product Announcements

EXTRUSION: Feedblock Tuning Insert Lets Processors Keep Running
Extrusion Dies Industries LLC 3/28/2014
HEATING/COOLING: Novel Heaters for Injection Nozzles, Extrusion Melt Pipes
Xaloy Inc. 3/24/2014
Extrusion: Basis Weight Sensor For Thin Films
Thermo Scientific 12/31/2013
Extrusion: Gauge for Battery-Separator Film
NDC Infrared Engineering Inc. 12/31/2013
Extrusion: Higher Output Line For PVC Cling Film
Macro Engineering & Technology Inc. 12/31/2013

View More New Products

Copyright © Gardner Business Media, Inc. 2014 All rights reserved.