Blown Film Line Uses Water Instead of Air
With the AQUAREX blown film line, Windmöller & Hölscher expands its blown film product range to include a line that blows film downwards and uses water instead of air to quench the bubble. Quenching the bubble with water rather than air decreases the cooling time by a factor of 30. The sudden freezing of the melt minimizes the build-up of crystallites in the plastic, thereby creating an amorphous structure with excellent optical properties. At the same time, the effect of biaxial stretching, which can only be achieved with the blown film process, is maintained. The “crystal clear” film looks more like window glass than film. Aside from the outstanding optical properties, the water quenching process also improves mechanical properties, such as puncture resistance and dart-drop-value.
Windmoeller & Hoelscher
(401) 333-2770; www.whcorp.com