Press Information

Ettlinger at the Compounding World Expo 2018
Melt filtration for fine or coarse contaminants

[ Ettlinger Kunststoffmaschinen ]

The world of thermoplastic compounding and recycling is also the world of high performance melt filters. Whereas Ettlinger’s ECO filter systems are designed for easy-flowing feedstock such as PET or PA, the models in the ERF family are mainly intended for starting material containing coarse contaminants. © Ettlinger

Königsbrunn, June 2018 – At its shared booth with the Maag Group (Stand 123) at the upcoming Compounding World Expo 2018 on June 27 and 28 in Essen, Ettlinger will present itself as an expert for all filtration tasks connected to thermoplastic compounding and recycling plus the entire post-extrusion process. The exhibit will center around Ettlinger’s ECO family of filter systems for easy-flowing materials as well as the recently launched ERF350 melt filter, which has an extra-high throughput and the power to handle feedstock with higher contaminant levels. The Maag Group has a broad portfolio of products specially tailored to the needs of the compounding industry, which apart from filtration systems also includes pumps, strand and underwater pelletizing systems and pulverizers.

The decisive hallmark of both the ECO and the ERF filter series is their long runtimes virtually free of interruptions. This advantage derives from the rotating cylindrical screen with conical holes over which the scraper slides, reliably separating all retained contaminants from the melt with every rotation and feeding them immediately to a discharge unit. This effectively avoids blockage, even if the filter is in use for several weeks or months at a time. The result: absolutely constant pressure with significant benefits for sensitive applications like film, sheet and pipe extrusion or downstream strand or underwater pelletizing systems. Thanks to the special discharge principle, these Ettlinger filters moreover have the lowest melt losses in the industry, leading to low operating costs and hence a rapid return on investment.

The melt filters in the ECO series are mainly designed for very easy-flowing materials such as PET or PA containing up to 1.5% contaminants but are also suitable for filtering polyolefins and polystyrenes. They are offered in two different sizes with a maximum throughput of 1000 kg/h or 3000 kg/h. Their typical applications include the manufacture of PET packaging tape, films and sheets as well as fiber production and PET bottle recycling. Compounders choose ECO filters to separate gels and agglomerates reliably from virgin material. In particular, the ability to recycle PET packaging tape and the fact that the melt filters can be directly integrated into PET thermoforming lines are opening up attractive growth opportunities.

The Ettlinger ERF series is ideal for filtering heavily contaminated polyolefins and polystyrenes as well as styrene copolymers, TPE and TPU. Foreign particles such as paper, aluminum, wood, elastomers or high-melting polymer composites can be reliably removed from materials containing up to 18% contaminants. The treatment of post-consumer plastic waste, which can have a high aluminum, rubber or silicone content, is one very common application. However, these filters are also used to convert recycled automotive plastics, where paint particles have to be efficiently removed from the recycled material, for instance, or to treat refrigerator and electronic waste. ERF melt filters are available in three different sizes with a maximum throughput of 6000 kg/h. Nearly 400 of these units are meanwhile in action very successfully every day around the world. The ERF350 is the first model in a new, performance enhanced generation. Depending on the type of material, the level of contamination in the melt and the selected screen size, it achieves a maximum throughput of 3800 kg/h – around 28% more than its predecessor, the proven ERF250 – for the same filtration surface, the same small footprint and similarly high energy efficiency.

Ettlinger Kunststoffmaschinen GmbH was founded in 1983 and is today a global player. The German company has its headquarters in Königsbrunn, not far from Augsburg. Its core competency is the development and manufacture of high performance melt filters and injection molding machines. Ettlinger has been part of the Maag Group since 2018. 

Maag is a worldwide leading manufacturer of gear pumps, pelletizing and filtration systems and also pulverizers for sophisticated applications in the synthetic, chemical, petrochemical, pharmaceutical and food industries.

More information on Ettlinger:
Karsten Bräunig, Manager Sales
Ettlinger Kunststoffmaschinen GmbH, Messerschmittring 49,
D-86343 Königsbrunn
Phone: +49 8231 34908 -12, Fax: -28,
e-mail: karsten.braeunig(at) 

Editorial contact and specimen copies:
Dr. Jörg Wolters, Konsens PR GmbH & Co. KG
Hans-Kudlich-Strasse 25, D-64823 Gross-Umstadt
Phone: +49 (0) 60 78 / 93 63 - 0, Fax: - 20,
e-mail: joerg.wolters(at)