Windmöller & Hölscher has claimed a world record for its latest Varex blown film line, demonstrated at K 2010 producing a new five-layer general purpose 40 micron tissue wrap film at output rates in excess of 1000kg/hr, as per European Plastics News. Such films are typically manufactured in a three-layer configuration. Since W&H engineers believed that three-layer constructions will not provide the flexibility required to optimise production in the future, they worked in conjunction with ExxonMobil Chemical to create a new generation of five-layer films using a metallocene-catalysed polyolefin. The results are thinner films with improved properties. The line is currently being modified to seven-layer production and will shortly be shipped to Danafilms, USA.
The 2,200 mm line was fitted with a special variant of the company's latest five-layer 400 mm Maxicone P die designed to produce films with a thick core layer; core layers in barrier type films are usually very thin. It was equipped with five VAREX extruders - four 70 mm units and a 105 mm model for the core layer - configured with high-performance, low-temperature screws optimised for polyolefin processing. It also used a new Opticool high capacity air ring design.
10-Jan-11 
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