PROCESSING | MELT FILTERS
Left: The ERF 1000 is the latest and largest high performance melt filter from Maag Group company Ettlinger
that guides the contaminated material through cooling sections, before it is dis- charged into collecting bins. Nordson says that the
HiCon R-Type system cleans more efficiently than other systems for highly contami- nated polymers. The design makes possible a uniform load on the strainer tube during cleaning, providing an extended lifetime for the filter and scrapers and – increasing overall efficiency of the system at far less melt loss.
Continuous filter At K2019, Maag Group company Ettlinger unveiled its largest ERF continuous melt filter for ultra-high throughputs and removing difficult contaminants. The ERF 1000 has four filter drums that together provide a filtration surface of 6280cm², twice as much as on its previous range topping ERF 500 model (which has the same footprint). It can handle feedstock containing up to 18% contaminants on lines with outputs of up to 10,000 kg/h, depending on the application. A new feature introduced on the ERF 1000 allows the four filter drums to be replaced individu- ally without disrupting production. This means the device can run continuously and fully automatically, often over a period of several months at a time, with advantages such as ultra-low melt losses and good mixing and homogenising of the melt. The large surface area of the drums, along with the continuous cleaning principle employed, makes it easier to check the process pressures and guaran- tees a constant pressure during operation. Existing Ettlinger filter owners that buy an ERF 1000 will, in the future, be able to profit from compatible wear parts such as screens, frames, and scrapers, leading to simplified spare parts management.
Right: Maag’s FSC screen changer in standard execution with stainless steel covers
Distribution deals Ettlinger has also signed up two new distributors in Europe. Most recently, it signed up
Mircan 1979 as its distributor in Spain and Portugal. The family- owned business, based in Barcelona in Spain, has been a partner of Ettlinger’s patent company, Maag, since it was founded in 1979.
16 PIPE & PROFILE EXTRUSION | January/February 2021
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Last year, Ettlinger signed up Ricco Interna- tional Trade & Consul- tancy as its distributor in Poland. As well as selling
Ettlinger’s systems, Ricco will be responsible for local after-sales service in the medium term. “Apart from the central
geographical location – with optimal access to nearby Warsaw – the key factor influencing our decision to partner with Ricco was its longstanding experience in selling and servicing plastics machines,”
according to Uwe Kellner, managing director of Ettlinger.
Compound options Aside from its Ettlinger developments,Maag says it has updated its melt filtration product portfolio. “Besides their main task of removing contaminants and gels from the polymer matrix, filter systems help to homogenise the material,” said the company. The range includes continuous melt filters and various types of discontinuous melt filters. “All melt filters have been re-designed specifi- cally with market and customer needs in mind,” said Maag. “Requirements are met by a large number of options, which can also be combined with one another.” Maag’s FSC flat slide technology covers a wide
range of viscosities and temperatures, for low- viscosity polymers, such as hot-melt adhesives. It incorporates a metal hybrid sealing system and can handle temperatures up to 320°C. Meanwhile, DSC and CSC piston screen chang-
ers are available with three different cavities: the standard round cavity for very high filler contents; the enlarged “PE” cavity, which Maag says provides versatility in balancing throughput and filler loading; and the “R” cavity in the form of a curved sieve to realise a four times greater filter area.
IMAGE: MAAG GROUP
IMAGE: MAAG GROUP
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