Recovered carbon black is edging closer to mainstream adoption as ASTM International committee D36 on Recovered Carbon Black develops a new ash content standard, D8621. The test promises to slash analysis times from 18 hours to just a few, a change that could reshape productivity and quality control for tyre makers and rCB producers. Yet the push for faster monitoring also exposes a bigger challenge, as standardisation alone will not guarantee industry-wide adoption. With high capital investment, scaling hurdles and safety considerations, the new method sits at the intersection of technical progress, economic pressure and the tyre industry’s sustainability ambitions.

The ASTM International’s recovered carbon black (rCB) D36 committee developed and published a new standard called D8621, which will improve productivity of tyre makers and also enhance production process monitoring abilities.

Speaking exclusively to Tyre Trends, ASTM D36 Chair and Director of rCB at Circtec, Pieter Ter Haar, said, “The D1506 method was developed for regular carbon black, which typically has an ash content of <1 percent. rCB typically has an ash content between 15 and 30 percent.”

The new standard promises to cut testing times from 18 hours to just a few. Commenting on this, he said, “This rCB-specific test method requires less material, and by operating the furnace at a higher temperature, the rate-of-reaction is optimised for rCB, resulting in the significant reduction in time. Since ash content is one of the important product specifications, reducing the time to obtain results is of great help in quality control of the production process of rCB.”

“The main benefit is the significant reduced time required to obtain ash content information of the rCB sample from a tailor-made test method. The future bias and precision study will have to show if the method also has an improved standard deviation,” he added.

CONSENSUS BUILDING

The method’s creation reflects the convergence of some of the industry’s biggest players. “This standard was created by the globally leading rCB, carbon black and tyre manufacturers who come together in the committee. We will actively try to promote the use of this method going forward both for producers and users,” said Ter Haar.

He argued that the proposed standard could reshape the economics of rCB production, particularly in terms of reducing waste or lowering costs as more process control will typically result in less waste and a quicker ability to adjust feedstock ratio’s when changes need to be made.

“This new method will also help tyre manufacturers analyse rCB faster and this will, however, not likely play a role in competitiveness compared to virgin carbon black,” he stated.

According to Ter Haar, the temperature of the muffle furnace has increased from 550 degrees Celsius to 700 degrees Celsius, which is an important consideration for the manufacturer using this method when it comes to safe execution of this method. Besides, he wasn’t aware of any other potential risks or limitations that need to be considered.

Alluding to how critical is standardisation in gaining wider adoption of rCB within tyre production supply chains from Circtec’s perspective, Ter Haar explained, “Standardisation will not be the silver bullet for better understanding of rCB or overcoming the initial adoption phase of rCB in rubber compounds. However, when it comes to consistent supply of rCB, relevant rCB-specific specifications are crucial.”

SUSTAINABILITY PUSH

ASTM Standard D8621 fits neatly into the tyre industry’s strategic pivot towards greener materials. According to Ter Haar, the new standard is part of the wider industry development of the rCB producers and adaptation to the needs and requirements of the tyre industry for adoption of new raw materials for the construction of tyres.

He pointed to high levels of capital deployment, the emergence of reputable producers across global regions and platforms like ASTM as proof that rCB is on track to become a cornerstone of tyre sustainability.

“There are very few sustainable raw material options available for the tyre industry that seem to be developing into mature industries,” the spokesperson noted, stressing that rCB is now positioned as a key strategic material for fulfilling long-term sustainability and circularity objectives.

Circtec itself is pushing hard to lead the charge. Later this year, the company will open its third European factory in the Netherlands. The facility, built to a scale comparable with regular carbon black plants, is expected to convert around six percent of all waste tyres in Europe into sustainable products once it reaches full capacity.

“We will continue to focus on the global expansion of Circtec and the development of the sector when it comes to regulatory compliance, technical knowledge and producing high-quality rCB at large industrial scale,” he said.

INDUSTRY RECEPTION

The new standard has already won the backing of the tyre industry. “The tyre industry was an active participant in the development and approval process of this new standard,” Ter Haar emphasised.

The benefit is straightforward, which is more precise quality control. “Any time one of the raw material suppliers can improve their quality control, this is welcomed. The main objective of any new standard is that the test method is technically relevant and improves the ability to test rCB’s characteristics that actually correlate to in-rubber performance,” he explained.

For producers, the efficiency gains are significant. At Circtec’s Netherlands plant, for instance, output is expected to reach 10 tonnes of rCB per hour. At these production rates, quick quality control test methods are crucial.

While faster process monitoring will primarily benefit producers with scaled up production capacity, Ter Haar noted that the standard is not necessarily designed to spark innovation in rCB applications beyond tyres such as plastics or coatings.

Crucially, adopting the new standard won’t require expensive technical upgrades. “The benefit of this method and aim during the development is that for most producers or end-users, there would not be a need for any new investments in equipment. This method is based on the use of an affordable ashing muffle furnace with the ability to heat to 700 degrees Celsius,” he said.

ADOPTION DYNAMICS

ASTM standards remain voluntary, but Ter Haar expects uptake to be swift given the operational advantages. “This new standard is a tool to improve the speed of quality control. It is up to the individual parties to adopt this or any other ASTM method. Due to the clear advantages of this method, I would expect both producers and users to welcome using this test method moving forward,” Ter Haar said.

The development also represents a milestone in a broader strategic roadmap. The ASTM committee D36 on Recovered Carbon Black, formed eight years ago, initially issued guidance on which carbon black test methods could or should not be used.

“At the moment, most of the key product performance characteristics of rCB can be determined,” he observed, suggesting that D8621 could be a stepping stone towards a broader suite of rCB-specific standards on par with virgin carbon black testing.

As rCB moves into the mainstream, the combination of industrial-scale production, regulatory support and technical validation is setting the stage for what could become one of the tyre industry’s most significant sustainability transformations in decades.

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German chemical group WACKER has announced significant price increases for a wide range of silicone products, effective from 1 February 2026. These adjustments, which will see prices rise by up to 25 percent or even higher in specific instances, will be applied across existing customer contracts as necessary. The decision is a direct response to unprecedented surges in raw material costs, most notably for the precious metal platinum, a critical catalyst used in the production of addition-curing silicone products and crosslinking silicone release agents.

According to Tom Koini, Head of Silicones, the extreme market dynamics have made this step unavoidable, as internal efficiency measures can no longer absorb the cost pressure. Platinum prices on international commodity exchanges have more than doubled since the beginning of the previous year. WACKER states that the price adjustments are essential to maintain its high standards of product quality, customer service and technical support moving forward. The increases will specifically affect addition-curing silicone rubber grades, silicone resins, silanes and silicone-based release coatings.

The company’s Silicones division, a global leader with a portfolio of over 2,800 specialised products, serves key industries including automotive, pharmaceuticals, medical technology, electrical engineering and energy transmission. The portfolio encompasses silicone fluids, elastomers, resins, sealants, silanes and release coatings, all designed to enhance the performance and value of end products. In 2024, this division accounted for approximately 49 percent of the Group’s total sales.

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ARLANXEO, a leading performance elastomers company, has officially opened its new Therban hydrogenated nitrile butadiene rubber (HNBR) production facility in Changzhou, China. This advanced plant, dedicated to producing the Therban brand, is designed to meet rising demand across vital industries including new energy, automotive, aerospace and next-generation battery technologies, where materials must endure extreme operational conditions.

Strategically positioned within ARLANXEO’s existing Changzhou complex, which also houses an EPDM plant and a Regional Technology Centre, the new installation strengthens the company’s integrated approach from innovation to manufacturing. It forms a crucial part of a global production network that includes sites in United States and Germany, establishing Changzhou as a central hub for the Asia-Pacific region.

The facility boasts an annual design capacity of 5,000 tonnes, with the first phase of 2,500 tonnes having successfully commenced operations in October 2025. It was completed with an exemplary safety record, achieving over 1.1 million incident-free work hours throughout its construction and commissioning, which was concluded within 13 months.

Engineered for high efficiency and environmental responsibility, the plant incorporates state-of-the-art finishing technology for consistent product quality. A key feature is an advanced thermal oxidation system that recovers energy and cuts carbon emissions in core processes by approximately 80 percent compared to traditional methods. Furthermore, the facility employs a closed-loop design that eliminates routine process wastewater discharge, supporting ARLANXEO’s commitment to reducing greenhouse gas emissions.

The inauguration was marked by a ceremony attended by senior leadership from ARLANXEO and its shareholder committee, alongside representatives from key customers, local authorities and community partners. This expansion significantly enhances ARLANXEO’s ability to supply reliable, high-performance elastomer solutions to its regional customer base.

Dr Faisal Al Faqeer, ARLANXEO Shareholders’ Committee Chairman and Aramco Senior Vice President of In-Kingdom Liquids to Chemicals Development, said, “China is important in supporting Aramco’s downstream growth. ARLANXEO’s new Therban® HNBR plant is the most recent demonstration of Aramco’s downstream expansion strategy of portfolio diversification and integration, underscoring our confidence in China’s innovation and manufacturing strength. We look forward to deepening our cooperation and further contributing to China’s high-quality and sustainable growth.”

Stephan van Santbrink, CEO, ARLANXEO, said, “Today’s inauguration marks an important milestone for ARLANXEO and a strong demonstration of our long-term commitment to China. We sincerely thank the Changzhou government, Aramco and all stakeholders for their trust and continued support. With the new HNBR plant now fully operational, we are further integrating our local production and R&D capabilities to strengthen the resilience of our global supply network. By delivering locally produced, high-quality rubber products, we will continue to collaborate with our customers and accelerate application innovation, creating greater economic and social value across our value chain.”

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Taiwan-based performance materials company CHIMEI has secured a distinguished A rating in the CDP Climate Change assessment for the second consecutive year, positioning it within the leading four percent of global organisations evaluated in 2025. This recognition from the prominent environmental disclosure platform underscores the company’s sustained excellence across critical areas such as climate governance, comprehensive risk management and transparent emissions reporting. CHIMEI’s performance demonstrates tangible progress in lowering product emissions intensity, driving self-managed reduction projects and rigorously measuring greenhouse gas outputs in accordance with international standards.

Central to the company’s strategy is its ‘Clean & Green’ vision, which directs a thorough low-carbon transformation. This commitment is operationalised through internal carbon pricing, optimised manufacturing processes and a shift towards renewable energy. CHIMEI further ensures accountability by obtaining third-party verification for the carbon footprints of its entire product range. The pursuit of sustainability extends beyond its own facilities, as the company actively promotes the use of sustainable materials and fosters collaborative decarbonisation efforts throughout its value chain.

Looking forward, CHIMEI is dedicated to engaging with customers, suppliers and partners to advance shared climate objectives, including its ambitious 2050 net-zero target. By continuously investing in innovative technologies and eco-friendly solutions, CHIMEI aims to be a catalyst for industry-wide change, supporting the transition toward a more resilient and low-carbon future for all.

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Kraton Corporation, a leading global producer of speciality polymers and high-value bio-based chemicals derived from pine wood pulping co-products, has achieved International Sustainability and Carbon Certification (ISCC) PLUS for its manufacturing facility in Panama City, Florida, United States. This independent certification tracks sustainable materials via a mass balance approach. The achievement allows Kraton to issue a formal ISCC PLUS Sustainability Declaration with shipments of its biobased polyterpene resins, providing its customers with the documentation needed to validate the renewable content in their own products.

The Panama City site becomes the company’s fourth production plant to gain this certification, building upon a commitment that started with the certification of its Sandarne, Sweden, facility in 2021. By securing these certifications across its network, Kraton strengthens its leadership in supplying circular and renewable solutions. This effort supports broader industry shifts, as customers can now more seamlessly integrate verified, sustainable materials into their supply chains and end products.

Ultimately, the company’s pursuit of such certifications aligns with a larger transition towards a more sustainable and circular economy, demonstrating how specialised chemical producers can enable tangible environmental progress through verified chain-of-custody systems.

Lana Culbert, Kraton Pine Chemicals VP of Marketing, said, “Our SYLVARES™ and SYLVATRAXX™ brands feature a portfolio of high-performance polyterpene resins. They are widely recognised for their use in adhesives and tyre applications, yet their versatility extends to other industries, like agriculture, with more opportunities ahead. While we can measure bio-based content of our pine chemicals using Carbon-14 analysis, certifying our Panama City facility under ISCC PLUS strengthens supply chain transparency, supporting the growth of the circular economy.”

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