Continental is making huge strides in using sustainable and recyclable raw materials.

Car tyres are round, black and made of rubber. Look closer, however, and you’ll see that the design of tyres and the interaction of the various materials that go into making them are extremely complex. But for some time now, material experts and tyre engineers at Continental have been bringing about a silent revolution. By 2050 at the latest, all tyres are to be made of sustainable materials. There is still a long way to go until then. But step by step, it is already becoming apparent which raw materials will find their way into tyre construction in the future. These include waste products from agriculture (such as the ash from rice husks), rubber from dandelions, recycled rubber or PET bottles.

Claus Petschick, Head of Sustainability at Continental Tires, is clear about Continental’s mission, saying, “Continental is on the road toward becoming the most progressive manufacturer in the tyre industry in terms of sustainability. We aim to use 100 percent sustainable materials in our tyre products by 2050 at the latest. Our innovative power enables us to break new and even more sustainable ground. This encompasses everything from the origin and sourcing of our materials through to the reuse and recycling of our tyres.”

Already today, around 15-20 percent renewable or recycled materials are used in a standard passenger car tyre from Continental. To further increase the proportion of sustainable materials and conserve valuable resources, Continental continuously analyses and reviews all raw materials used in tyre production.

Perfect material matching for maximum safety 
Depending on the application, season and environment, tyres have to fulfill specific requirements. This can be seen in, for example, the tread design. But in other areas – the composition of the rubber compound, for example – these changes are not so readily visible. Passenger car tyres from Continental consist of as many as a hundred different raw materials.

Their precise composition has a major impact on the tyres and their handling characteristics. The ability to deploy the various materials with their unique properties and interdependencies in specific ways is a complex balancing act for Continental’s engineers and material experts. Only when all the materials are ideally matched to each other can safe, energy-efficient and durable high-performance tyres be created.

Natural rubber still essential due to exceptional properties
Natural rubber is essential for ensuring outstanding tyre performance. This natural product accounts for between 10 and 40 percent of the entire weight of modern high-performance tyres. Its special properties include the high level of strength and durability, which are caused by the strain-induced crystallisation of the rubber. The tyre industry is the biggest consumer of global rubber production, accounting for more than 70 percent. However, Continental considers natural rubber a sustainable material only if it is sourced responsibly. Therefore, the company employs an integrated approach aimed at making the complex and fragmented supply chains for natural rubber more sustainable, including using cutting-edge digital technology, local involvement and close collaboration with capable partners with the goal of improving transparency and traceability along the entire value chain. Meanwhile, with its Taraxagum project, Continental is pursuing an innovative approach to ensure that it can become less dependent on natural rubber grown primarily in southeast Asia. The tyre manufacturer is working alongside partners on industrialising the extraction of natural rubber from specially cultivated dandelion plants.

Sustainable plant-based fillers 
In addition to rubber, fillers such as silica are essential to tyre assembly. Silica, for example, helps to optimise characteristics such as grip, rolling resistance and tyre life. In the future, rice husks will be used as the source material for sustainably-produced silica. Rice husks are a waste product of rice production and cannot be used as food or animal feed. Silica derived from the ash of rice husks is more energy-efficient when used in manufacturing than that obtained from conventional materials such as quartz sand.

Plant-based oils, such as rapeseed oil and resins based on residual materials from the paper and wood industries, already offer an alternative to crude-oil-based fillers in Continental's tyres. Only oils that meet technical quality standards and are not suitable for consumption are used. Oils and resins allow for flexibility in terms of tyre compounds and so improve the material’s grip.

Expanding the circular economy
Continental is aiming for fully circular operations in its tyre production by 2050 at the latest. In addition to the use of renewable materials, the company is working systematically on using recycled raw materials in tyre production. This is intended to ensure that carbon black – another crucial filler in rubber compounds – can be obtained on a large scale in the future. Continental recently signed a development agreement with Pyrum Innovations with a view to further optimising the recycling of materials from old tyres. To do this, Pyrum breaks the old tyres down into their constituent parts in an industrial furnace using a special pyrolysis process. This way, valuable raw materials contained in end-of-life tyres can be extracted and recycled. Both companies are working towards obtaining high-quality raw materials from the pyrolysis oil obtained for Continental's tyre production in the medium-term, in addition to the direct use of high-quality carbon black. In the long-term, the tyre manufacturer and Pyrum are aiming to establish a closed loop circular economy concept for the recycling of old tyres.

Recycled rubber from end-of-life tyres
In addition to pyrolysis, Continental is also making use of mechanical processing of end-of-life tyres. Rubber, steel and textile cord in particular are separated from one another in a highly sophisticated process. The rubber is then prepared for re-use as part of new rubber compounds.

Continental has a long history of working consistently to introduce end-of-life tyres into the circular economy to conserve resources and the environment. A material known as Conti-Reclaim has been obtained as part of the truck tyre retreading process at the company’s plant in Stöcken in Hanover since 2013. It has been used in tyre production at Continental for years. To expand the range of applications for the recycled rubber and optimise the properties for the various fields of application, Continental uses not only Conti-Reclaim but also recycled rubber from other suppliers.

Recycled plastic bottles in tyre casing 
“Recycled raw materials are going to play a big role in making tyres more sustainable. We use recycled materials whenever possible. Comparable quality and material properties to conventional raw materials are crucial for us,” says Petschick.

For example, Continental is working with partners to obtain high-quality polyester yarn for its tyres from recycled PET bottles. PET bottles often end up in incinerators or landfills otherwise. With its ContiRe.Tex technology, the tyre manufacturer has developed a more energy-efficient and eco-friendly alternative that allows it to reuse between nine and fifteen plastic bottles for each tyre, depending on the tyre size. The recycled PET has already replaced conventional polyester in the structures of some tyre casing. The PET bottles used are sourced exclusively from regions where there is no closed recycling loop.

Systematically moving toward greater sustainability
Continental is working to advance innovative technologies and sustainable products and services throughout its entire value chain, from sourcing sustainable materials to recycling end-of-life tyres. The company is aiming to achieve 100 percent carbon neutrality by 2050 at the latest.

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ARLANXEO has launched its ISCC PLUS-certified Keltan Eco rubber grades in India, responding to rising demand for sustainable materials in the world’s most populous nation.

The German-based performance elastomers manufacturer unveiled the portfolio through technical seminars and workshops, targeting automotive components, wires and cables applications where customers increasingly value environmental credentials.

The Keltan Eco range comprises Eco-B and Eco-BC grades derived from bio-based and bio-circular feedstocks, respectively, whilst maintaining identical physical and mechanical properties to conventional fossil fuel-based products. The materials offer resistance to oxygen, ozone, heat and radiation.

ARLANXEO employs a mass balance approach for certification, ensuring the volume of Eco-labelled products corresponds with sustainable source feedstock volumes. This methodology provides supply chain transparency and enables customers to verify sustainability claims in downstream applications.

“This new portfolio will help our customers seize sustainable growth opportunities in India and stay ahead amid industry transformation,” said Rupesh Shah, ARLANXEO India’s Managing Director and Regional Sales Head.

The company also showcased its Therban hydrogenated nitrile butadiene rubber speciality grades during the events, targeting original equipment manufacturers and component producers. Therban applications include air conditioning seals, timing belts, high-temperature gaskets for oil platforms and spacecraft components.

ARLANXEO operates as one of the world’s largest synthetic rubber producers with more than 10 production sites across eight countries and four research and development locations globally. The company serves automotive, tyre, electrical, construction and oil and gas sectors.

The Indian launch forms part of ARLANXEO’s broader strategy to expand sustainable product offerings across key growth markets. Additional ISCC PLUS-certified synthetic rubber grades will be introduced in India following the initial rollout.

India’s steady rubber consumption growth, driven by the automotive and infrastructure sectors, signals a significant opportunity for speciality chemical producers aiming for sustained market expansion. ARLANXEO is well-positioned to meet this demand, marking a decisive step toward a greener, more innovative rubber industry in India.

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Rathi Group, a leader in pyrolysis and end-of-life tyre (ELT) recycling, has achieved a significant milestone with its first export shipment of ISCC PLUS-certified pyrolysis oil. With over 12 years of industry expertise, the company continues to set benchmarks in sustainable recycling, innovation and circular economy practices.

This landmark export highlights Rathi Group’s ability to supply globally recognised, eco-friendly alternatives to conventional fossil fuels. The company’s integrated operations – spanning ELT shredding, continuous pyrolysis, carbon black recovery and oil distillation – adhere to stringent international sustainability standards.

The ISCC PLUS certification underscores Rathi Group’s commitment to environmental responsibility, supply chain transparency and climate-conscious solutions. The accomplishment reflects the efforts of its dedicated team and partners, reinforcing the company’s mission to drive impactful change in sustainable tyre recycling.

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Kraton Corporation, a global leader in speciality polymers and renewable biomaterials, has published its 2024 Sustainability Report, Innovating with Purpose. The report outlines the company’s advancements in climate action, circular product solutions and supply chain sustainability, reinforcing its commitment to a greener future.

Key achievements include a 41 percent reduction in Scope 1 & 2 emissions since 2014, a 35 percent decrease in emissions intensity and maintaining EcoVadis’ Platinum rating for the fourth straight year. Kraton also received the 2024 Nitto Supplier Sustainability Award and conducted a Double Materiality Assessment to refine its ESG strategy.

Operational milestones feature a USD 35 million upgrade to its Florida biorefinery, expanded lifecycle assessment (LCA) data covering 90 percent of its product portfolio and a new data excellence programme to enhance ESG transparency.

Aligned with GRI, SASB, UN Global Compact and TCFD frameworks, the report emphasises Kraton’s sustainability pillars: Reliable Partnerships, Planetary Stewardship and Empowering People. These efforts reflect the company’s dedication to responsible innovation and measurable environmental progress.

Marcello Boldrini, CEO, Kraton, said, “2024 marked a pivotal year in Kraton’s sustainability journey. We turned ambition into action, significantly reducing our Scope 1 and 2 emissions by 41 percent from our 2014 baseline and earned an EcoVadis Platinum rating for the fourth consecutive year. We accelerated our decarbonisation strategy, advanced biobased innovation and partnered with customers such as WJ Group and Henkel to help address global sustainability challenges. As demand for sustainable chemicals grows, our focus remains on developing the right solutions, fostering strong partnerships and cultivating the culture necessary to lead this transformation responsibly and competitively.”

Rogier Roelen, Chief Sustainability Officer, Kraton, said, “We have established new processes to scale credible, data-driven sustainability across our business. In 2024, we enhanced our ESG reporting through a data harmonisation programme and completed a Double Materiality Assessment to better align with the Corporate Sustainability Reporting Directive (CSRD). We also expanded our Life Cycle Assessment (LCA) data to cover almost 90 percent of our product portfolio, providing customers with greater transparency into the environmental impact of our products. These efforts reinforce our ability to identify where we can make the most impact and support more informed, strategic decision-making.”

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The German rubber industry is undergoing significant shifts, according to the German Rubber Industry Association (wdk) in its mid-2025 economic report. While order trends show improvement for the first time in years, domestic production continues to struggle, reflecting broader structural challenges.

High energy costs, excessive bureaucracy and rising labour expenses remain persistent hurdles, particularly for globally competitive firms. Although rising orders may boost annual sales slightly compared to 2024, domestic output is expected to decline by one percent. Many companies are relocating production abroad due to Germany’s worsening cost disadvantages.

The federal government’s ‘investment booster’ initiative has failed to inspire confidence, with only 27 percent of industry leaders anticipating positive effects. wdk President Michael Klein described this as an alarming sign, emphasising that businesses lack faith in current economic policies. He urged immediate relief measures rather than delayed solutions.

Klein also stressed the need for inclusive policymaking, criticising the government’s focus on large corporations while neglecting small and medium-sized enterprises (SMEs). He warned that without targeted support for these critical players, Germany risks losing its status as a key industrial hub for the rubber sector. The call for urgent action highlights growing concerns over the industry’s future viability in the country.

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