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.

ZC Rubber has received the Second Prize of China's State Science and Technology Progress Award for a project focused on high-performance tyre technologies and green intelligent manufacturing, developed jointly with Harbin Institute of Technology. The award recognises the project, titled Key Technologies and Green Intelligent Manufacturing of High-Performance Tires.

According to the company, ZC Rubber is the only Chinese tyre manufacturer to receive the State Science and Technology Progress Award at the Second Prize level or above during the past decade. The award is among China's highest state honours for scientific and technological innovation.

The company said the recognition reflects its investment in research and development and its efforts to integrate tyre development with intelligent manufacturing. In 2025, ZC Rubber invested RMB 1.54 billion in research and development, equivalent to 3.43 percent of annual revenue, according to its annual report.

The award recognises technologies that have moved beyond laboratory research into industrial application, linking high-performance tyre development with green and intelligent manufacturing processes.

Central to the company's research strategy are two proprietary technology platforms: the X-Tech System for truck and bus radial tyres and the Phecda Tech System for passenger car radial tyres. The platforms combine compound formulation, tyre structure design, process engineering, simulation, testing and intelligent manufacturing within a single development framework.

Rather than adapting an existing product architecture, the platforms define performance targets according to vehicle application, operating conditions and customer requirements before developing compounds, structures and manufacturing processes. ZC Rubber said this enables it to develop tyres for different duty cycles, climates, road conditions and regional requirements rather than using a standardised design.

Henry Shen, Senior Vice President of ZC Rubber, said: “Our objective is not simply to develop an individual material, tread pattern or manufacturing process. X-Tech and Phecda are complete development systems that connect user requirements with simulation, materials, tire engineering, manufacturing and validation. This award recognizes the direction we have pursued through sustained R&D investment.”

The company has applied the X-Tech and Phecda platforms across products developed for different regions. In Asia, the X-Tech System underpins the X-Elite truck tyre series. In Europe, it is used in the WESTLAKE Gen II commercial tyre range, while the Phecda Tech System supports passenger car tyres including the WESTLAKE ZuperAce Z-007 and GOODRIDE Solmax 1. Technologies from both platforms have also been applied across ARISUN's truck and passenger car tyre ranges in the Americas.

Shen said: “International markets do not have identical requirements. A tire developed for European highway fleets, Southeast Asian transport operations or passenger vehicles in the Americas must respond to different vehicles, roads, climates and customer priorities. Our technology platforms allow us to address those differences through a consistent and systematic development process.”

The company said the award-winning project incorporates green and intelligent manufacturing technologies intended to improve product consistency, production efficiency and energy performance. It added that the X-Tech and Phecda platforms will continue to support original equipment and replacement market product development across its WESTLAKE, GOODRIDE, ARISUN and other brands.

The Indian Rubber Materials Research Institute (IRMRI) has officially announced the appointment of Professor (Dr) Abhijit Bandyopadhyay as its new Director. This decision marks a significant leadership transition for the institute, as it prepares to welcome a figure with extensive expertise in polymer science and rubber technology.

Professor Bandyopadhyay brings a distinguished academic and technical background to his new position. He currently serves as a full Professor in the Department of Polymer Science and Technology at the University of Calcutta and holds the role of Director, Technical at the South Asia Rubber and Polymers Park in West Bengal. His prior experience includes a tenure as Assistant Professor at the Rubber Technology Centre, IIT Kharagpur, and he has recently been appointed as a Technical Consultant for Rubber products at Berzelius Materials Performance Inc. in the United Kingdom.

Stepping into his new role, the new Director is expected to prioritise research advancement, indigenisation of technologies and sustainable development within the rubber sector. The IRMRI leadership and members have expressed confidence in his visionary guidance, anticipating that his leadership will drive the institute toward greater innovation and research excellence in the coming years.

The Bureau of Indian Standards (BIS) has granted laboratory recognition to M/s D. Banerjee Centre of Excellence (DBCOE), based at the JSS Technical Institutions Campus in Mysuru, Karnataka, for a three-year period from 8 July 2026 to 7 July 2029.

The recognition, issued under the BIS Laboratory Recognition Scheme (LRS), enables the centre to undertake testing activities in accordance with BIS requirements. The laboratory's details have been uploaded to the BIS Laboratory Information Management System (LIMS), with sample receipt, testing and report generation to be managed through the online platform. The recognition remains subject to compliance with the provisions of the BIS LRS 2020.

Established by the Indian Institute of Rubber (IRI) in collaboration with JSS Technical Institutions, the centre is intended to strengthen industry-academia collaboration in polymer science and rubber technology while supporting research, testing, training and technology development for the tyre and wider rubber industry.

The facility has developed capabilities in material characterisation, wet chemistry and forensic failure analysis. Its laboratories can analyse raw materials including carbon black, rubber chemicals, elastomers, accelerators and antioxidants, while also supporting material specification development, plant audits and quality approvals. Plans are also in place to expand failure analysis services for manufacturers, particularly small and medium-sized enterprises (MSMEs).

DBCOE also aims to support manufacturers adapting to changing automotive requirements, including electric vehicles, through research into advanced materials and sustainable alternatives. Its stated focus includes bio-based materials, tyre recycling, steel reuse and low-emission polymers, alongside technical support for regulatory compliance and homologation.

Alongside its testing infrastructure, the centre has established a training ecosystem for the rubber sector. It offers two flagship programmes: a Diploma in Rubber Technology for diploma holders and new recruits, and a Postgraduate Diploma in Rubber Technology for science and engineering graduates. Both programmes combine online theory modules with practical training and laboratory sessions at the Mysuru campus, with final examinations conducted by IIT Kharagpur.

The centre is also developing a series of short-duration industry courses covering mixing, compounding, extrusion, calendering, tyre building, moulding, retreading, footwear, conveyor belts and latex products. These programmes combine classroom instruction with practical demonstrations, testing methodologies and failure analysis.

According to the centre, more than 40 industry experts contribute to its training programmes. Several tyre manufacturers, including Apollo Tyres, Yokohama, BKT and JK Tyre, recognise completion of the diploma programme as part of their employee development initiatives.

The centre primarily serves the tyre industry but also aims to support non-tyre rubber manufacturers, particularly MSMEs that lack access to advanced testing facilities and technical expertise. Through consultancy, training and laboratory services, it seeks to improve technical capability, product quality and compliance across the broader rubber sector.

Elkem ASA, a global leader in advanced silicon-based materials, has announced the appointment of Dag Teigland as its new Chief Executive Officer, effective 3 August 2026. The board’s decision coincides with the departure of Helge Aasen, who will step down after leading the company since 2009 to take on the role of Chairman of the Board.

Bringing more than two decades of industrial and investment expertise, Teigland currently serves as executive chairman of Tekna Holding ASA, a firm known for advanced metal powders. His career includes senior executive positions at Tinfos AS and Holta Invest AS, where he managed an active investment platform. Previously, he held multiple leadership roles at Elkem from 1998 to 2002, culminating as Managing Director for the chrome business area, providing him with direct familiarity with the company’s operations.

Marianne E Johnsen, Interim Chair of the Board of Elkem, said, “The Board is pleased to appoint Dag Teigland as CEO of Elkem. He brings deep industrial expertise and a proven track record of driving development and transformation. With his background spanning both international industrial operations and investment environments, Dag is well suited to lead Elkem into its next phase of growth and development.

“At the same time, the Board would like to thank Helge Aasen for his strong leadership and significant contribution to Elkem over many years. During his tenure, Elkem has strengthened its strategic position, expanded its global footprint and developed world-leading positions in silicon, ferrosilicon, foundry alloys and carbon solutions. Helge has also led Elkem through major portfolio and financing measures, including the divestment of the Silicones division. We are very pleased that he will continue to contribute to the company’s development as chairperson of the board.”

Teigland said, “It is a great honour to return to Elkem and take on the role of chief executive officer. Elkem is a company with a strong industrial heritage and a leading position within its respective segments. I look forward to working with the Board, the Elkem leadership team and colleagues worldwide to build on this foundation, accelerate sustainable growth, advance safety and innovation and ensure that Elkem continues to supply the strategic materials needed for a cleaner, smarter and more resilient future.”

Aasen said, “It has been a privilege to lead Elkem as CEO over the past 17 years. I am proud of what the organisation has accomplished during this period and confident that the company is well positioned for long-term, sustainable value creation. I look forward to continuing to support Elkem in my new role as chairperson of the board and to work closely with Dag in the transition.”