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.

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Tana Oy has appointed Panu Ärölä as its new Territory Business Manager, a role he will assume on 2 November. In this capacity, he will focus on strengthening customer and distributor relationships across designated markets while contributing to the company’s ongoing expansion within the waste management and recycling sector.

Ärölä returns to Tana after previously serving as Sales Manager, where he developed expertise in distributor network growth. His background includes extensive international experience in sales, marketing, business development and strategic leadership. Most recently, he held the position of Head of Sales and Marketing at Jet-Tekno Oy, overseeing customer relationship development and business growth initiatives.

Gerd Schreier, VP – Sales, Marketing & Channel Development, said, “We are delighted to welcome Panu back to Tana. His industry knowledge, customer focus and experience in international sales make him a valuable addition to our team. We look forward to working with him as we continue to develop our business and create value for our customers and partners.”

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Stephan Sielaff took over as chief executive of the Schill+Seilacher Group on 1^st October , as the chemicals group seeks to strengthen links between its businesses and focus more closely on customer needs.

Sielaff brings about 30 years of experience in developing international businesses and organisations. His previous roles include positions at Unilever, Symrise, Archroma, Lenzing AG and SSI SCHÄFER Plastics.

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“A good product alone is no longer enough. What matters is the value we create for our customers,” says Stephan Sielaff.

The group said it would seek to share knowledge, pursue opportunities jointly and strengthen connections between its locations and business areas.

Sielaff's appointment is intended to support a more integrated approach across the group as it develops its businesses in the years ahead.

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Toyo Tire Corporation of Japan (Toyo Tire) has announced executive appointments at Toyo Tire Holdings of Americas Inc. (TTHA) and Nitto Tire U.S.A. Inc. (NTU), effective 1 October 2026. Keiko Brockel has become President and Chief Executive Officer at TTHA, while Angelo Naval has beeen promoted to President and Chief Executive Officer at NTU.

Brockel, the first woman and first American to hold the TTHA role, will oversee daily North American business operations. She joined NTU in 2008 and previously served as its President and Chief Executive Officer and President and Chief Operations Officer. Over 18 years at NTU, she has held various executive leadership positions, providing strategic oversight in sales, finance, supply chain and operations, contributing significantly to the company's growth and evolution.

Angelo Naval

Naval, formerly Vice President of Sales and Business Strategy at NTU, will now oversee its business operations. He joined NTU in 2000 and also served as Vice President of Product and Business Strategy. During his 24 years with the company, he has been instrumental in shaping the business, gaining deep understanding and a unique perspective on the Nitto brand, its customers and the markets it serves.

Takashi Shimizu, President & CEO, Toyo Tire Corporation, said, “On behalf of Toyo Tire, I would like to congratulate both Keiko Brockel and Angelo Naval on their well-earned new appointments and thank them for their invaluable contributions to the growth and success of Nitto Tire in the American market.”

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ContiTech, the group sector of Continental, has named Amanda Lacerda as its new Head of Communications, with effect from 15 September 2026. In this capacity, she will report directly to Diana Hoppe, who serves as Head of Human Relations and Communications at ContiTech. The appointment places Lacerda at the helm of the organisation’s global communications operations.

In her new position, Lacerda will act as a strategic partner focused on advancing business performance, transformation and brand value. Her responsibilities encompass corporate, executive and brand communications, alongside media and public relations, public affairs, employee communications and reputation management. She is tasked with maintaining a consistent narrative that bolsters ContiTech’s global reputation and aligns with its business priorities and strategic ambitions. Lacerda takes over from Claudia Lademann-Fleger, who has chosen to depart the company for external opportunities.

Lacerda arrives with over two decades of experience in communications, marketing, and public affairs. Her global leadership background includes roles across Brazil, Middle East, Sweden and Germany. Over her career, she has engaged with diverse international markets and industries, assisting organisations in strengthening their brands, managing change and cultivating meaningful relationships with key stakeholders.

Diana Hoppe, Head of Human Relations and Communications, ContiTech, said, “Effective communication plays a key role as ContiTech continues its transformation and prepares for its future as a standalone company. Amanda brings extensive international experience, strategic insight and domain expertise in communications that will help strengthen our brand, enhance our reputation and deepen engagement with employees, customers, partners and communities around the world. As we continue to build a strong and distinctive brand, her leadership will be instrumental in advancing our strategic ambitions and long-term success. I also want to thank Claudia for her many years of dedicated leadership and service to ContiTech, and I wish her every success in the future.”

Lacerda said, “I am excited to join ContiTech at such an important moment in its journey. ContiTech has a strong heritage, talented people and a clear vision for the future. I look forward to working with colleagues around the world to tell our story, support the company’s transformation and help create value through clear, authentic and engaging communications.”

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