Companies now can feed big portions of plastic waste discontinuously into a recycling extruder using fourth-generation technology from Erema Engineering Recycling Maschinen und Anlagen GmbH.
Erema's T-DD recycling system also can boost performance by 15 percent with no change in plant size, and cuts energy use 20 percent, the company said.
Technical modifications to Erema's cutter/compactor enable T-DD to separate the working steps of material processing — such as shredding, drying, agglomerating and preheating — from the extruder feeding step.
By uncoupling material pre-treatment from extruder feeding, Erema has shielded the extruder and its sensitive feeding zone from things that can reduce throughput and hurt quality, such as moisture, differing densities and temperatures and very big feed portions. The company can retrofit the technology.
In the case of bi-oriented PET film waste, for example, improved drying from the T-DD method means there no longer is a need for extruder degassing. Also, the extruder is much shorter, with a length-to-diameter ratio cut by almost half, which saves energy.
Erema, based in Ansfelden, Austria, reported sales of 60 million euros (US$70 million) for the fiscal year ended March 31. Sales and profit increased 10 percent over the year before.
Erema North America Inc. is in Ipswich, Mass.
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