The Changing Market - From Monolayer to Multilayer Coextrusion

The Changing Market - From Monolayer to Multilayer Coextrusion

Dan Falla
Nova Chemical

Over the last number of years, we have seen a significant change in the packaging market. We have seen the #10 can replaced by “bag in box” and now a flexible pouch in the shape of a box is being used in restaurant and institutional applications. Now, the old classic baby food jar is being replaced with a flexible pouch that also incorporates a fitment allowing the child to feed themselves in a safe and mess free manner.
The drivers for these changes are source reduction, ability to recycle, and cost reduction. The next changes are films with engineered structures utilizing greater number of layers. Each layer having a specific function. We are seeing monolayer lines being replaced with three, five, seven, nine and even eleven layer lines. In this presentation, the reasons for coextrusion are discussed along with examples to show an understanding of the function of each of the layers relative to performance and cost in typical food packaging films.