K 2025 Trade Fair New Recycling Process for Polyamides from End-of-Life Vehicles

From Ipek Muftuler | Translated by AI 1 min Reading Time

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BASF, together with Mercedes-Benz, Pöppelmann, and ZF, has developed two new recycling processes for Polyamide 6. The recyclates come from end-of-life vehicle parts.

BASF has developed two new recycling processes for polyamide. The company and its partners have produced and tested prototypes. Pictured: a chain guide rail from Pöppelmann for Mercedes-Benz.(Image: BASF)
BASF has developed two new recycling processes for polyamide. The company and its partners have produced and tested prototypes. Pictured: a chain guide rail from Pöppelmann for Mercedes-Benz.
(Image: BASF)

At the K 2025 trade fair, BASF jointly presents two new recycling methods for Polyamide 6. The projects were developed together with Mercedes-Benz and the suppliers Pöppelmann and ZF.

In a pilot project, a chemical process was developed to recycle technical plastics through depolymerization. In this process, the long polyamide chains are split at the inherently present predetermined breaking points. The resulting monomers, "caprolactam," are then purified and re-synthesized into polyamide (PA6). Further processed into a polyamide compound, the material meets the required quality standards and is suitable for demanding components in the automotive industry, BASF reports.

BASF and ZF have produced a chassis component (stabilizer link) for Mercedes-Benz from recycled PA6.(Image: BASF)
BASF and ZF have produced a chassis component (stabilizer link) for Mercedes-Benz from recycled PA6.
(Image: BASF)

The project partner ZF has manufactured a chassis component – the so-called stabilizer link – for Mercedes-Benz using this material.

PA6 from Shredder Residues

The second process uses shredder residues from end-of-life vehicles – a mix of different materials after glass and metals have been removed. From these residues, BASF has also succeeded in extracting polyamide (PA6).

The polyamide fraction obtained in this way was used as the starting material for a new solvent-based recycling process as part of the pilot project. In this process, the polymer chains are not broken but are selectively dissolved using a suitable solvent, then cleaned, and ultimately processed back into usable PA6 compounds.

The technology was validated by Mercedes-Benz using a chain guide rail in series production. The components were manufactured by Pöppelmann under near-series conditions as part of the pilot project and successfully tested, it is further stated.

Life Cycle Analysis for Recycled PA6

BASF has had life cycle analyses conducted by an external company alongside the pilot projects. The results, the company reports, showed significant CO2 emission savings for both new recycling processes – both compared to the use of fossil raw materials for producing comparable polyamide compounds and compared to conventional plastic recycling methods (thermal recovery).

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