Tetra Pak's Issue - Solution - PFA Heat Shrinkable Sleeves Background The market for Flexible Packaging, including drinks packs, bubble wrap and foil based packaging, has seen the rise of many companies. The essential concept revolves around the extrusion lamination process whereby an extrusion head drops molten polymer onto various substrates – most commonly card and foil – in a nip pressure situation provided by a metallic chill roller which is water cooled and a rubber nip roller which provides the flexible pressure Problem At the edge of the product and, in some cases where holes are created for the insertion of drinking straws, the molten extrudant comes in contact with the roller and there is an unacceptable build-up of polymer. Typically the running temperature of the extruder is ov

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