PT ZONE: Film Extrusion

Air-Ring Upgrades Get Film Processor Quickly Up to Spec
PolyExpert’s trials lead to installation of three new air rings and one digital IBC control to speed changeovers and reduce scrap. More (+)
PT Article PE Market Film Analysis: Converter Film
Market projected to grow by 3.6% year through 2017. More (+)


Nova Installs Nine-Layer Blown Film Coextrusion Line to Enhance Customer Collaboration

As part of a several upgrades at its Calgary R&D facility, Nova Chemicals has installed a semi-commercial scale nine-layer blown film coextrusion line.

PE Film Market Analysis: Consumer Can Liners

Huge market still dominated by single-layer structures, which could change as use of PCR grows.

PE Film Market Analysis: Institutional Can Liners

Huge market still overwhelmingly dominated by monolayer structures.

PE Film Market Analysis: T-Shirt Bags

It's a huge business that will grow modestly over the next three years even in the face of environmental obstacles.

EXTRUSION AND COMPOUNDING AT NPE: Flexibility, Speed, Quality Rule the Day

Extrusion processors need more—of everything—to compete. And suppliers responded in force in Orlando.

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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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