With the rise of electric vehicles reducing exhaust emissions, attention is shifting to non-exhaust emission like Tyre and Road Wear Particles (TRWP). These microscopic particles, generated from tyre and road surface friction, are a growing environmental concern and will be addressed in the upcoming Euro 7 emissions standard. To tackle this challenge, Nynas has joined a major research consortium coordinated by the Royal Institute of Technology (KTH), alongside Volvo Cars, Scania and the Karolinska Institute.
The project aims to close a significant scientific knowledge gap by thoroughly investigating the formation, characteristics and environmental impact of TRWP. Nynas contributes a unique dual perspective to this interdisciplinary effort, bringing deep expertise in both tyre rubber compounds and bitumen-based road materials. Pär Nyman, Technical Manager – Tyre & Chemical Industries, Nynas, represents the company in the project alongside the company’s Chief Scientist, Dr Xiaohu Lu, who brings extensive expertise in bitumen and asphalt to the collaboration. A key focus will be understanding how different materials contribute to wear mechanisms.
The research scope extends beyond particle analysis to include measuring the rolling resistance of various tyre and bitumen combinations, a parameter directly linked to vehicle energy efficiency and greenhouse gas emissions. By uniting industry and academia, this collaboration is poised to drive innovation and set new benchmarks in sustainable mobility research.
Pär Nyman, Technical Manager – Tyre & Chemical Industries, Nynas, said, “While Sweden lacks domestic tyre manufacturers, Nynas' research capabilities fill that gap by providing foundational insight into the chemistry and physics behind TRWP generation. Nynas' rubber and asphalt labs are at the heart of this contribution. One of the core insights driving this initiative is that wear particles cannot be fully understood by analysing tyres or roads in isolation. It's the interaction – the system – that matters. By studying both tyre composition and road structure, the project aims to develop a holistic view of TRWP formation, dispersion and toxicity. At Nynas, we are excited to contribute our unique knowledge of materials to help solve an important challenge for both the environment and human health. Through collaboration and scientific inquiry, we aim to pave the way for cleaner roads and cleaner air – one particle at a time.”
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