NEWS


NGR develops conical twin screw extruder


Günther Klammer, CTO at Next Generation Recycling Machines (NGR), told a press event at K2025 that ever since he started at the Austrian company nine years ago, he had held a belief in the concept of a conical co-rotating twin screw extruder for plastics recycling. This concept bore fruit in Dusseldorf with the launch of NGR’s ECO-Twin 220 system.


“I always say conical is


the natural design of an extruder,” said Klammer, who developed the ECO- Twin technology with an experienced team from 4NG, an NGR affiliate company comprising Stefan Lehner, Mario Strutzenberg- er and Harald Engleder, as


ECO-Twin 220 system on display at NGR’s K2025 stand


well as Klammer. For processing PET bottle


flakes, the ECO-Twin 220 delivers very gentle process- ing and operates with very low energy consumption. NGR said: “The screw geometry follows a natural


physical principle: large surface areas and high circumferential speeds in the feed zone to introduce energy into the material, and smaller surfaces with lower speeds in the dis- charge zone to minimize


friction and dissipation.” Speaking by the ECO-


Twin 220 on NGR’s stand, Stefan Lehner, Head of Product Management PCR at the company, highlighted the small size of the extrud- er’s two drive motors. These result in a compact drive layout. They also allow precise dosing control by accurately detecting torque fluctuations. The ECO-Twin system’s


extruder operates with “exceptional stability”, according to NGR, “deliver- ing consistent energy input and high, precisely control- lable throughput rates”. See PET recycling feature


starting on page 29 for more information. � https://ngr-world.com


Erema puts innovations on show at K2025


Austrian recycling technology group Erema unveiled some novel develop- ments for PCR and PIR plastics on its K2025 stand. Volex is a water stripping technol- ogy installed on a single-screw extruder for the first time, shown at K on an Intarema 1108 TVEplus. Erema’s EcoGentle plasticising technology is also new for Intarema systems, now making it available for polyolefins. Volex achieves a big degassing performance: up to 40% lower VOCs in the pellets compared with standard degassing, and up to 75% lower than the input material, according to the company. “We have really pushed degassing


[in PO recycling] to never-known limits,” said Markus Huber-Lindinger, Managing Director at Erema, speaking


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to Plastics Recycling World at Erema’s K stand.


In the Volex technology, water is added to the plastic melt in precise doses and distributed evenly as an entraining agent. Erema says a prerequisite for Volex is the use of proven Intarema TVEplus technology in combination with a specially developed extruder screw and cylinder geometry in the degassing zone. Another eye-catching development shown by Erema at K2025 was its new TwinPro system, which for the first time couples Erema’s Preconditioning Unit (PCU) directly to a twin screw extruder. The system is particularly suited for processing low bulk density material, such as film waste. Huber-Lindinger said some of the company’s customers have special


PLASTICS RECYCLING WORLD | November/December 2025


requirements when recycling multi- material films, both PCR and PIR waste. Producing high-quality recycled pellets from multilayer film consisting of PE-PA or PE-EVOH is a major challenge for the recycling process. A high degree of homogenisation is needed, which TwinPro has been designed to achieve, he said. The TwinPro also opens up the potential for using twin screw extrud- ers in the recycling of thin-wall rigid packaging, which is also challenging due to very low bulk density and possible moisture fluctuations of the input material. Erema says one particular application is PP flakes that have been sorted and hot-washed from very thin-walled packaging such as yoghurt tubs. � www.erema.com


www.plasticsrecyclingworld.com


IMAGE: AMI / ELDRIDGE


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