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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India’s growing importance in the global tyre and rubber industry received a strong endorsement with HF Group announcing a EUR 20 million investment in a new state-of-the-art manufacturing facility in Bengaluru.

The announcement was made during the inauguration of HF India’s new Assembly Hall Unit II, a milestone that reflects the company’s long-term commitment to India and its confidence in the country’s manufacturing future.

The proposed greenfield facility will be developed on a 10-acre site near Bengaluru Airport and is scheduled for completion by 2028. Spread across nearly 20,000 sq. metres, the new factory will be almost four times larger than the current assembly operations and will incorporate digital manufacturing, automation, smart production systems, and advanced engineering capabilities.

The upcoming facility will focus on productivity, precision engineering, sustainability, and smart manufacturing while supporting both the Indian market and HF’s global operations. The investment underlines the company’s confidence in India as a major manufacturing hub for the global tyre and rubber industry.

Ian Wilson, Managing Director & Co-CEO, HF Group, said, “This is not the end of our investment in India. It is perhaps the end of the beginning. India is entering a take-off decade and the economy runs on tyres. We see tremendous opportunities for growth and are committed to investing in the future of the Indian market.”

With more than 175 years of global experience, HF Group has steadily strengthened its presence in India. The journey began in 1995 with the establishment of Indus to serve the growing rubber processing industry. The partnership with HF Mixing Group in 2011 brought global mixing technology expertise to India, while the complete acquisition of the Indian subsidiary in 2024 marked another important milestone in the company’s India strategy.

Today, HF India manufactures and supports a broad portfolio of mixing and rubber processing equipment, including intermeshing and tangential mixers, banbury technology, mills, curing presses, and aftermarket services. The company also offers process support, training, upgrades, inspections, and spare parts under its customer-centric philosophy of ‘Holding the Customer’s Hand.’

Emphasising the importance of customer partnerships, Wilson said, “We are not here simply to sell machinery. We want to hold our customers’ hands throughout the entire lifecycle of their equipment and support them through process optimisation, performance improvements and future growth.”

As HF embarks on its next chapter in India, the new facility represents not only an investment in manufacturing capacity but also a long-term commitment to localisation, technology and customer partnerships.

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TBC Corporation (TBC), one of North America’s largest marketers of automotive replacement tyres through wholesale and franchise operations, has named Ron Harper as its new Chief Supply Chain Officer. He will report directly to President and CEO Don Byrd and assume responsibility for the company’s entire supply chain function.

Harper brings over 26 years of experience steering global supply chains for multi-billion-dollar enterprises. His most recent role was Executive Vice President of Supply Chain at PrimeSource Building Products, overseeing planning, inventory, repack operations, service metrics and analytics. He has also held senior logistics and strategy positions at Sonepar USA, Nordstrom, Samsung SEA, and JCPenney.

The new chief holds a master’s degree in supply chain management from the University of Denver and a bachelor’s in industrial management from Michigan Technological University. His appointment underscores TBC’s focus on strengthening operational efficiency and logistics performance.

Byrd said, “Ron’s depth of experience in building transformative supply chain solutions aligns with our deep commitment to providing customers with the high-level efficiency, product availability and agility they expect from TBC. As market needs change and demands fluctuate, TBC is continuing to respond by having a supply chain strategy that minimises disruptions and maximises efficiency to ensure the highest levels of customer support and satisfaction.”

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The Rubber Board of India has announced the appointment of N Hari as its new Chairman, effective for a tenure of three years. Hailing from Pallikkathode in Kottayam, Kerala, Hari brings considerable experience to the leadership role, having previously served as a Board member representing small rubber growers from the state.

His initial term on the Board commenced on 28 June 2022 and spanned three years. During this period, he also held the position of Executive Committee Member from 7 October 2023 to 6 October 2024. This progression from membership to the executive committee and now to the chairmanship reflects his sustained engagement with the organisation.

His appointment is expected to steer the Board's initiatives in supporting the rubber sector, focusing on grower welfare and industry development across India.

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The Indian automotive landscape is currently undergoing a seismic shift. Driven by the rapid rise of rural urbanisation, an aggressive government push for electrification and the development of world-class road infrastructure, the industry is witnessing a period of robust growth. With sales of both new and used vehicles touching record highs, the demand for high-quality tyres remains in a significant upswing.

At the helm of one of the market’s most prominent players is Rajarshi Moitra, Managing Director of Bridgestone India and Vice-Chairman, Automotive Tyre Manufacturers’ Association (ATMA).

In an interaction with Tyre Trends, Moitra discusses the company’s future-ready roadmap, from its substantial capacity expansions to a ‘sharp and deep’ strategic focus designed to maintain leadership in an increasingly premium and electrified market.

A BULLISH OUTLOOK ON THE SUBCONTINENT

While global economic indicators remain varied, Moitra is unequivocally optimistic about the local trajectory. “The Indian automotive industry is at an exceptionally positive juncture from a medium-to-long-term perspective,” he asserts.

This optimism is grounded in several structural tailwinds that suggest India is slated for very strong growth. Key among these factors is the sheer room for market expansion.

“Firstly, we are still significantly under-indexed in terms of car penetration, with only 50 cars per 1,000 people – well below even some smaller developing nations,” Moitra explains.

Furthermore, the geographical spread of wealth is changing. Bridgestone is observing massive growth in Tier 2, 3 and 4 towns, a phenomenon Moitra attributes to ‘rural urbanisation’.

Bridgestone India estimates a transformative half-decade ahead for the industry. “The number of affordable households – those capable of purchasing a car – will double in India over the next five year. When you couple this with the government’s massive capital outflow into road connectivity and the rise of e-commerce, it creates a very bullish environment for both passenger and commercial mobility,” Moitra says.

THE ‘SHARP AND DEEP’ STRATEGIC PILLAR

Despite India being the world’s largest two-wheeler market, Bridgestone is famously absent from that segment – and intends to stay that way for now. Moitra clarifies that the company’s philosophy is rooted in specialisation rather than horizontal expansion. “At Bridgestone, we believe in being ‘sharp and deep’ in our strategy,” he says.

Currently, Bridgestone India’s business split is heavily weighted towards the consumer segment, with 70 percent of sales coming from Passenger Car Radial (PCR), 25 percent from Truck and Bus Radial (TBR) and 5 percent from Off-the-Road (OTR) segment.

“We see enough headroom for growth within the passenger car segment across products, channels and customer experience, so we are focusing our resources on maintaining our leadership there,” Moitra notes, dismissing any near-term plans to enter the two-wheeler space.

Instead, the company is doubling down on ‘white spaces’ within the consumer car category, specifically targeting higher rim diameters and specialised compounds for Original Equipment Manufacturers (OEMs).

INVESTING IN CAPACITY AND LOCAL INTELLIGENCE

To support this growth, Bridgestone is moving aggressively on the manufacturing front. With current operations running at 90–95 percent capacity, the company is in the midst of a major investment cycle.

At present, the company’s Pune plant has a capacity to produce 4.01 million passenger car tyres and around 693,000 truck & bus radial tyres, while the Indore plant has a capacity to produce 7.11 million radial tyres for passenger cars and light trucks.

“Our last major investment was USD 85 million in October 2024, which is being ramped up in phases through 2029,” Moitra confirms. This capital is being used to scale volumes and enhance technical capabilities at the Indore factory.

The new investment is expected to further add 1.1 million tyre production capacity in Pune by CY2029, thus taking its total production capacity to around 11.1 million units in the country.

“Our strategy is two-fold: we want to be future-ready for market demand while simultaneously sweating our current assets to drive higher efficiency,” Moitra explains. Crucially, this expansion isn’t just about physical output; it’s about local autonomy. Moitra highlights that a ‘very large part’ of procurement is now local, decided by teams on the ground in India.

The launch of a Satellite Technology Centre in 2025 has further decentralised the company’s innovation engine. According to Moitra, this centre plays a pivotal role in increasing local leverage and technical presence, allowing the Indian arm to maintain a balance between local agility and global sourcing.

EVs AND PREMIUMISATION

As the Indian market matures, consumers are demanding larger wheel sizes – a trend Moitra says is led by OEMs. “We are seeing a clear market shift towards higher inches – for example, a car like the Maruti Suzuki Swift moving from 14-inch to 15-inch and others moving from 16-inch to 17-inch,” he observes.

Bridgestone’s ‘all-inch’ strategy covers the spectrum from 12 to 20 inches, but their brand strength is most potent in these premium, higher-diameter sizes.

This premiumisation dovetails with the transition to electric vehicles (EVs). Bridgestone has positioned itself with an ‘EV-ready’ portfolio, exemplified by the Turanza 6i. “It balances long-lasting durability and safety with low noise and comfort – essential for EVs,” says Moitra. To ensure they capture this nascent but fast-growing market, the company expanded the range from 36 sizes in 2024 to 72 sizes by 2025.

The OEM relationship remains the cornerstone of this technological foresight. “The OEM segment allows us to see ahead of the curve regarding future vehicle technologies,” Moitra explains.

At present, 35 percent of their consumer business is OE-based and Bridgestone is in active discussions with many of the newer automotive entrants arriving in India.

While Bridgestone is aggressively expanding its footprint in new tyre technology and premium consumer segments, it is taking a markedly more conservative approach towards the retreading sector in India. Despite the potential for material circularity, the company does not view retreading as a strategic priority for the immediate future.

Moitra clarifies that Bandag, Bridgestone’s global retreading arm, is not currently active in India, and there are no plans to introduce it in the near-term. This decision is driven largely by the unique and challenging dynamics of the local market, which is currently dominated by cold retreading.

He points out that a significant pricing challenge exists when ‘cold retreads versus biased tyres versus some of the cheaper tyres’ are compared, making the business case difficult to justify at this stage. Consequently, Bridgestone has opted to remain focused on its core segments for the next two to three years rather than entering the retreading space.

SUSTAINABILITY AND THE ‘INSTITUTION OF RESPECT’

Beyond the numbers, Bridgestone is attempting to build what Moitra calls an ‘institution of respect’. This involves a heavy commitment to environmental goals. The Pune plant already holds the distinction of being the first carbon-neutral facility in the Bridgestone group.

“Sustainability is a core agenda across our entire value chain,” Moitra explains, noting a public commitment to reduce the company’s carbon footprint by 50 percent by 2030, including Scope 3 emissions. This holistic approach ranges from manufacturing processes to material circularity in the tyres themselves.

Looking ahead, the goal is to protect a dominant market share – currently over 20 percent by volume and 23 percent by value in the passenger car aftermarket. To do this, Bridgestone plans to expand its physical reach by 30 percent over the next five years, building upon its current network of over 4,000 touchpoints.

As the company transitions its branding from the Olympics to Formula E, the focus remains clear: high performance and the next era of mobility. “It’s the perfect platform to showcase our technological edge,” Moitra concludes.

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