MELT FILTRATION | TECHNOLOGY
Technology, Dr. Sven Wieczorek will lead the new business unit unit under the new Maag ownership. Nordson introduced a new melt filter technology for blown film applications that handles high contents of recycled materials. Introduced at last year’s K show, Nordson’s new BKG HiCon K-SWE- HD/RS melt filter is based on its backflush technology and enables the use of contami- nated recycled material while keeping the blown film process stable and the end product quality high, says Christian Schroeder, Global Segment Manager for the recycling market at Nordson.
“Existing filters provide the necessary process stability and deliver clean, homogenous melt for a high-quality blown film when virgin material is used.” However, “the change from using only virgin materials to including recycled material is huge and needs new innovative technology to support that transition,” Schroeder says. That transition is being brought about by the social call for more sustainability in the plastics industry. Producing quality blown film is not an easy task,
says Schroeder. A film bubble reacts sensitively to changing process conditions. A minor change in the
material’s temperature, viscosity or pressure can have a negative impact. “Adding recycled materials to the mix is an additional disruptor to an already delicate process. Depending on their size, contami- nants can cause optical flaws and bubble ruptures, leading to line shutdowns,” Schroeder says. Process- ing recycled material generates more waste than that of virgin polymers because melt is removed from the filter during backflushing and venting. Nordson’s new filter is designed so this action
Above: Nordson
developed its BKG HiCon K-SWE-HD/RS melt filter for blown film applications
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IMAGE: NORDSON BKG
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