The tyre industry is undergoing a profound transformation, driven by sustainability, digitalisation and material innovations. As manufacturers push the boundaries with high-silica compounds, recycled rubber and alternative materials like dandelion rubber, the mixing process faces increasing complexity. Traditional methods struggle to maintain efficiency, necessitating advanced technologies like HF Mixing Group’s Tandem mixing and smart solutions. With automation, and precision engineering, the industry is redefining efficiency and sustainability.

Tyres are a sheer example of impeccable chemical engineering. From passenger car radials (PCR) to off-the-road (OTR), these technical marvels can carry loads weighing tonnes even in the deadliest of roads. For centuries, they have been the backbone of logistics, transportation and more.

But making a tyre is not an easy task. It involves a tremendously meticulous process ranging from raw material selection to mixing compounds for deriving the exact formula that gives these rubber casings durability, elasticity and more.

As the global tyre industry undergoes a transition in every critical aspect, it also sees a change in compounds that go into mixtures. This in turn paves the way for upgradation in technologies.

According to HF Mixing Director of Product and Services, Nils Spier, “The growing use of silica in passenger tyres is reshaping the industry with specifications now reaching 100, 130 and even 180 parts per hundred rubber (PHR). Levels above 150 PHR have recently gained traction, particularly in the premium segment, where high-performance tyres demand lower rolling resistance and improved wet grip.”

On the other hand, he revealed to Tyre Trends that increasing silica content presents technical challenges. Standard single-mixer setups face limitations due to the need for adequate silanisation time. When more silica is added, the process becomes more complex and time-consuming. HF Mixing Group’s Tandem mixing technology addresses this by transferring the process from an upper to a lower mixer, preventing capacity losses and optimising mixing efficiency.

“Dispersion is another critical factor as silica’s inherent stickiness complicates processing. The upper mixer completes the dispersing task, utilising a geometry established in the industry for over 20 years. The latest-generation PES7 mixer builds on this, ensuring the same high-quality results. Once the compound moves to the lower mixer, further refinements occur. A specialised bottom mixer rotor TRC, developed to enhance cohesion and compacting, helps mitigate issues where certain components tend to crumble. Without this step, batches risk fragmenting into plates and uneven portions, complicating further processing. The Tandem mixer’s rotor system ensures that the full batch remains intact, facilitating smooth transfer onto a mill or twin-screw extruder,” he added.

In a nutshell, the Tandem mixing technology allows tyre manufacturers to accommodate higher silica content without compromising processing efficiency or final product quality.

HF’s latest advancements in mixing technology are delivering notable efficiency improvements, particularly in intermeshing rotor systems. The PES7 rotor, introduced around two years ago, has now been successfully deployed at multiple customer sites, showing strong results in both new and retrofit applications. The rotor upgrade offers an increased mixer empty volume plus higher possible fill factors, resulting in a 10–15 percent increase in throughput without compromising cycle time or product quality.

UPGRADING MIXING TECHNOLOGY THROUGH SMART DIGITAL SOLUTIONS

According to Spier, “Tandem and the smart digital mixing solutions represent a holistic approach to optimising the mixing process. The smart final mixing solution is a software and service concept developed by HF, designed to work in close collaboration with customers. The process begins with defining the customer’s target recipe and process parameters, followed by calibration tests conducted on-site.”

Calibration tests involve capturing the fingerprint of the mix including rotor speed, drive data, temperature control unit settings and ram seating time. This data is then processed through the company’s proprietary algorithms and material models, which simulate various mixing scenarios to identify optimal process parameters.

The simulation models predict key variables such as batch temperature development at different rotor speeds and the impact of ram lift adjustments to improve compound aeration. This approach eliminates the need for extensive design of experiment, accelerating the optimisation process without compromising on productivity of the production equipment.

The smart mixing solution is specifically designed for HF mixers as the company has precise knowledge of the machine parameters, cooling surfaces and other mixer-specific properties. The validation trials conducted post-simulation have demonstrated cycle time reductions up to 20 percent, translating into significant efficiency gains for manufacturers.

Moreover, the company’s smart mixing approach optimises key parameters to enhance energy efficiency and quality in the mixing process. Cycle time is a primary focus with proprietary algorithms minimising unnecessary processing steps while ensuring uniform distribution and dispersion of the curative package.

Rotor speed plays a crucial role as it must be adjusted at different phases of mixing. A higher speed may be beneficial in the initial dispersion stage, but excessive speed leads to rapid temperature increases, negatively affecting compound properties. The company’s models balance rotor speed, energy efficiency and temperature for optimal results.

Lastly, fill factor is essential for both quality and efficiency. Overfilling can result in uneven mixing and longer processing times, while underfilling reduces throughput and jeopardises batch quality. The company’s Smart Final Solution ensures that the fill factor is set to an ideal level for maximum quality and throughput.

TECHNOLOGICAL INCLUSIVITY

The company’s approach to smart mixing is currently data-driven and reliant on process specialists, but the role of artificial intelligence (AI) in this field is expected to grow. “While AI has the potential to make autonomous decisions and process adjustments in the future, we still integrate human expertise alongside digital tools to ensure process reliability. Factors such as installed downstream equipment, mixer conditions and on-site variations must be considered, which currently require operator input. However, we are already exploring AI-driven solutions such as predicting batch temperature, optimising carbon black incorporation and refining oil dispersion, which could eventually enhance process automation,” informed Spier.

While digitalisation is a key part of the company’s transformative roadmap, AI’s role is still in development. Instead of full AI automation, it employs advanced models and algorithms that run extensive simulations to optimise mixing conditions without compromising quality. These models provide real-time feedback on the best possible process adjustments, delivering improvements in efficiency, quality and consistency.

Alluding to whether older mixers installed 5 to 10 years ago can be retrofitted with recent upgrades, he noted, “There is a possibility of retrofitting smart solutions to enhance its capabilities. Rather than relying solely on AI, we offer in-line process monitoring, where historical mix data is used to establish a reference baseline with tolerance bands. This allows for real-time adjustments.”

The mixing process is fully automated with step-related control systems defining key parameters such as mixing time, specific energy input and rotor speed per step, batch temperature to ensure precision and consistency. Every mixing step can be supported by HF’s unique intelligent controller technology such as intelligent Ram control iRam, the HF constant temperature controller or iXSeal Dust Stop Lubrication Controller.

PROCESS ADAPTATION

Tyre makers are increasingly experimenting with alternative materials, such as recycled rubber and dandelion-derived compounds, which significantly impact the mixing process. Adjustments are necessary to maintain efficiency and quality, as non-traditional materials alter torque curves and require parameter modifications.

Moreover, different category of tyres requires different mixing processes due to variations in tread compound formulations. Passenger car tread compounds typically differ from OTR formulations, necessitating specific dispersion techniques to achieve the desired performance characteristics.

With that said, it is prudent that companies adapt to changing processes fuelled by market demand. “The company provides a range of rotor solutions to optimise these mixing processes. Tangential rotors are designed to enhance master batch dispersion, especially the NST rotor, ensuring uniformity in the compound. ZZ rotors are mainly used for final batch production, offering precision in mixing the final formulation. In addition, the ZZ rotor geometry has proven strong performance in Master Batch Silica Processing. Additionally, intermeshing rotors are employed to manage specialised compounds, providing better control over the mixing process for unique material requirements,” revealed Spier.

Furthermore, material innovations are significantly impacting the mixing process, requiring process adaptations to maintain efficiency and achieve consistent final results. The use of alternative materials such as recycled rubber or non-traditional sources like dandelion rubber, rCB and other recycled materials alters the torque curves during mixing. These changes necessitate adjustments to mixer parameters, ensuring optimal dispersion and processing without compromising product quality.

To support customers in navigating these challenges, HF’s process experts collaborate closely with them through the technical centre in Germany and worldwide operating process engineers. By testing new processes before full-scale industrialisation, the company helps identify and resolve potential issues in advance.

INDUSTRY SHIFTS

The shift towards premium tyres is shaping the European, Asian and North American markets differently. In Europe, manufacturers are increasingly focusing on premium and OTR tyres while scaling back production of 15–17-inch models and consolidating operations.

This shift is driving higher demand for advanced compounds and increased silica usage. However, capacity expansions remain limited with most investments directed towards equipment upgrades rather than new production facilities.

In Asia, particularly in India and China, greenfield projects are on the rise due to strong automotive demand. This expansion reflects the region’s growing role in the global tyre industry as manufacturers invest in new facilities to meet both domestic and export needs. North America, on the other hand, is seeing a mix of replacement investments and selective large-scale expansions with companies balancing modernisation efforts and strategic growth.

Beyond these key regions, North Africa, specifically Algeria, Morocco and Egypt, is emerging as a new manufacturing hub. This region is gaining traction in the global tyre industry, an area where it previously had little presence. With increasing investment and infrastructure development, North Africa is positioning itself as a competitive player in tyre production.

With many manufacturers shifting to smaller campaign to accommodate different tyre recipe, flexibility in the mixing process has become essential. HF’s automation system is designed to handle these challenges by allowing quick modifications to production plans.

Manufacturers can adjust torque, batch sizes and compound quantities without causing disruptions. Additionally, the manufacturing execution system ensures seamless execution, making even short production runs of 5 to 10 batches efficient and cost-effective.

MARKET EXPANSION

Besides Europe, Asian markets such as China and India remain key growth locations for the company. As manufacturers in these regions adopt new technologies to meet evolving industry standards, the demand for efficient and adaptable mixing solutions continues to rise.

“We continue to invest heavily in innovation and research and development to grow in the Asian market. Allocating three percent of our revenue to innovation and 4.5 percent to development, the company ensures that 35 percent of its projects focus on sustainability. By maintaining technology leadership, we deliver high-quality, high-functionality equipment that supports the growth of new and established manufacturers in the region,” informed Spier.

While HF is known for its high-precision machines used by top-tier tyre manufacturers, it also caters to tier 2 and tier 3 players. The company supplies to many smaller manufacturers.

On the context of sustainability, Spiers noted, “Sustainability is a core focus of our research and development strategy, aligning with the ambitious environmental targets set by tyre manufacturers worldwide. We integrate sustainability by developing energy-optimised mixers with efficient drive setups, introducing new hydraulic power units that significantly reduce power consumption and implementing incremental efficiency improvements such as enhanced heat management to extend machine longevity.”

Lastly, the company provides comprehensive service beyond commissioning, including operator training, process optimisation and trouble-shooting, round-the-clock support via ticket and hotline systems and fast-response local service teams across China, South-East Asia, India, North America, North Africa and Europe.

Titan International, a major global manufacturer of wheels and tyres for off-highway equipment, has secured expanded production rights for the Goodyear brand across multiple segments while renewing its existing farm tyre licensing agreement.

The deal extends Titan’s Goodyear brand manufacturing rights to include light construction, industrial, all-terrain vehicle (ATV), lawn and garden and golf tyre categories, significantly broadening the company's market reach.

The Illinois-based firm will continue to produce agricultural tyres under the Goodyear Farm Tyres brand, maintaining its presence in a sector where it manufactures products ranging from small implement tyres to the massive Goodyear Optitrac LSW1400/30R46, which features the company's proprietary Low Sidewall Technology.

"We are excited to expand our rights into new segments, as this positions us to serve our customers better and seize emerging market opportunities. Our research and product development teams are already working on new tyre designs incorporating innovative tyre technologies for the lawn and garden segment," said Paul Reitz, President & CEO of Titan International, Inc. "In addition to our newly acquired rights, we are reaffirming our commitment to the farm tyres segment, a vital part of our business."

Industry analysts note the expansion comes as demand for specialised off-highway tyres remains robust across construction, agriculture and recreational sectors despite broader economic headwinds.

Strategic growth initiative

The licensing expansion aligns with Titan's strategy to offer comprehensive wheel and tyre solutions across forestry, powersports, outdoor power equipment, agricultural, earthmoving, and light construction markets throughout the Americas, Europe, Africa and Oceania.

The company did not disclose the financial terms of the licensing agreement with Goodyear.

Titan International has manufactured Goodyear-branded farm tyres since 2005, when it acquired Goodyear's North American farm tyre business. It has gradually expanded these rights to other regions, including Latin America, Europe, the Middle East, Africa, Russia, and Australia.

Targets International Expansion With Robust Fy25 Performance

CEAT Ltd, the RPG Group’s flagship tyre company, reported a capital outlay of INR 9–10 billion  for FY2025–26, keeping with its capacity expansion strategy and global integration. This follows a strong FY25 performance of record revenues and double-digit growth across segments despite headwinds in overseas markets.

The business ended FY25 with consolidated revenue of INR 132.18 billion, up 10.6 percent year on year, and Q4 revenue at INR34.21 billion, up 14.3 percent compared to the corresponding quarter previous year. The standalone full-year EBITDA was INR 15 billion, and the Q4 operating margins improved by more than 100 basis points sequentially at 11.5 percent.

"We incurred capex of INR 9.46 billion in FY25 and expect a similar investment of INR 9–1.0 billion in FY26," said Kumar Subbiah, Chief Financial Officer of CEAT. “Our focus will remain on expanding capacities, particularly at the Ambarnath and Chennai facilities, and funding the integration of the recently acquired Camso compact construction business.”

In FY25, CEAT depreciated assets amounting to INR11.40 billion. Much of its FY26 capex will also fund equipment modernisation and normal maintenance at its Sri Lankan operations under Camso, putting a cost estimate of INR1-1.25 billion a year over the next two years.

The Camso acquisition, which is effective from Q2 FY26, is likely to significantly enhance CEAT's global presence. "Integration work has started in full acceleration," said Arnab Banerjee, Managing Director and CEO. “Initial focus will be on customer retention and business continuity, with consolidation expected to double Camso’s current capacity utilisation over the medium term.”

Despite international uncertainties, CEAT renewed its medium-term global growth forecast. Exports are expected to form 25–26 percent of the revenue post-Camso integration. Turbulence still exists in Latin America and North America due to tariff policies and exchange rate weakness. CEAT, however, has reported consistent performance in Europe, the Middle East, and Southeast Asia.

CEAT also indicated a likely raw material cost stabilisation in Q1 FY26, potentially softening by Q2, to support its margin growth initiatives. The gross margin was 37.5 percent in Q4 FY25, and the target was above 40 percent in the near term.

Banerjee signaled ongoing activity in electrification, premiumisation, and digitalisation. "With our technology outlays and new product introductions, we are hopeful of sustaining 20–25 percent market share in electric vehicle segments," he asserted.

The debt levels of the company are under control. The gross debt as of 31 March 2025 was INR 19.28 billion with a debt-to-EBITDA ratio of 1.3x and debt-to-equity ratio of 0.44x. Subbiah added that CEAT's strong cash generation will allow it to finance both organic and inorganic growth without materially diluting leverage metrics.

Black Swan Graphene Inc. (Black Swan) has appointed Jobin George as Technical Sales Manager for the Europe, Middle East and Africa (EMEA) region with immediate effect. This significant move, which supports Black Swan's worldwide commercial team as it promotes adoption of its graphene-enhanced products, follows Dan Roadcap’s appointment as Head of Technical Sales and Business Development.

George has an MBA from ICFAI University in India, a Post Graduate Diploma from the Central Institute of Petrochemical Engineering and Technology in India and a Bachelor of Science in Chemistry from Mahatma Gandhi University, India. He brings with him more than 20 years of global expertise in project management, business development and technical sales. George has had positions at Sands International Plastics and Sojitz Corporation in the United Arab Emirates, as well as Aquapak Polymers and H-Pack Global Ltd.

Simon Marcotte, President and Chief Executive Officer, Black Swan Graphene, said, “The addition of Jobin to our commercial team marks another important milestone in our global expansion strategy. His international experience, particularly in the EMEA region, and his proven ability to translate technical capability into commercial success make him an ideal fit as we continue scaling our graphene business.”

George said, “Black Swan is positioned at the forefront of advanced materials innovation. The opportunity to contribute to the adoption of such a transformative technology across the EMEA region is tremendously exciting. I look forward to engaging with our existing customers and partners, along with exploring opportunities for new clients as well, to showcase the performance and value of Black Swan’s graphene solutions.”

The Tire Recycling Foundation (TRF), a joint initiative led by the U.S. Tire Manufacturers Association (USTMA) and the Tire Industry Association (TIA), has appointed Stephanie Mull as its Executive Director.

Mull will spearhead the organisation's initiatives to promote innovation and invest in the circular tyre economy, expand the market for end-of-life tyres and support studies to fill in the gaps in the sustainability and tyre recycling supply chain in her new role at TRF. Mull brings a wealth of experience in the sustainability field and a broad understanding of fleet management and decarbonisation, including converting fleets to electric and alternative fuel vehicles. In her role as PepsiCo's Sustainability Senior Manager, she oversaw major electrification projects, obtained grant money and spearheaded efforts to lower Scope 1 and Scope 2 emissions throughout Pepsi and Frito-Lay's North American fleets. Mull oversaw the local government's efforts to upgrade municipal vehicles to greener technology and volunteered to help the Red Cross electrify its fleet.

Anne Forristall Luke, TRF Board President, said, “Stephanie Mull brings the passion, in-depth expertise and history of excellence that will drive TRF and its partners to achieve critical tyre recycling and reclamation milestones. We are thrilled to have her join the Foundation as we advance tyre sustainability while tackling the challenges and opportunities ahead.”

Mull said, “I’m honoured to join the Tire Recycling Foundation and support its sustainability mission to achieve 100 percent end-of-life tyre circularity. TRF is a vital nexus of expertise and leadership, and I look forward to working with all stakeholders in developing tyre recycling solutions that pave the way for a more sustainable future.” 

The Tire Recycling Foundation is dedicated to achieving 100 percent circularity for end-of-life tires by advancing innovation, building partnerships and supporting scalable recycling and reclamation solutions. Consisting of 15 global industry leaders with expertise in the manufacturing, recycling and transportation industries, TRF’s Board primarily focuses on the acceleration and adoption of emerging end-of-life tyre market technologies like rubber-modified asphalt (RMA).