MELT FILTRATION | MACHINERY Screen test: latest in
melt filtration Recent developments in melt filtration include a screen changer with backflushing, a new way to enhance efficiency and how a retrofit helped a film recycler boost performance
The rise in demand for recycled material – espe- cially for film and sheet products – has led to a corresponding increase in the importance of melt filtration. Ensuring that raw material is purged of contamination is critical in the production of high quality end products. Gneuss has helped a Spanish film recycling company to raise product quality, by retrofitting one of its lines with a more efficient melt filtration system. Llorens GMR – based in Barcelona – offers collection, preparation and reuse of industrial waste. It has several reprocessing and recycling lines, including a relatively new one for reprocess- ing post-industrial waste film from LDPE and LLDPE. However, the filtration fineness that could be achieved with its original equipment was unable to remove critical contaminants from the polymer. Llorens decided to add an RSFgenius melt
filtration system from Gneuss as a fine filter, to remove contaminants measuring 56-100 microns. It achieves this at constant melt pressure, ensuring that gels and black specks are removed. As a result, Llorens can use the material produced on this line for high-value cast and blown film applications. Its customers can then meet the legal requirement for recycling content – allowing them to manufacture high-quality film.
Gneuss systems can handle high melt pressures
and materials with variable degrees of contamina- tion. At the same time, they operate process constant and with a high level of automation.
www.filmandsheet.com
Exchange of the filter elements takes place under normal production conditions, without disturbing the process.
RSFgenius also has long intervals between filter element changes – with a minimum of back flushing material – thanks to its efficient, automatic self-cleaning system. In recent years, the company has installed a
large number of these systems onto LDPE/LLDPE recycling extrusion lines, for fine filtration. Gneuss can offer complete retrofit packages comprising a filtration system, melt pump – if necessary – and integrated control system to maintain ease of operation.
EPS recycling Epsilyte, a US-based provider of insulative materials, has signed a strategic partnership with Fimic of Italy. Fimic’s equipment is used to filter recycled EPS,
addressing the challenge of physical contamina- tion and ensuring that the material meets the necessary purity and quality. Fimic said there were several reasons for Epsilyte choosing it as a partner. One was the company’s versatility in handling contamination. Fimic’s equipment has shown versatility in handling varying types and levels of physical contamination – which is common in EPS recycling. This helps Epsilyte produce high-quality recycled materials. Fimic’s technology also cuts the risk of damage to recycling equipment, helping Epsilyte to optimise operational efficiency and reduce downtime.
Main image: A Spanish film recycling
company has installed a Gneuss
RSFgenius to raise product quality
� December 2023 | FILM & SHEET EXTRUSION 35
IMAGE: GNEUSS
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