The year 2020 has been a year like no other. The pandemic has brought everyone on the same platform. We all have been a mute witness to the rage of Nature and the apocalypse it can create. The question which persists in my mind is ‘Have we really learnt any lessons from the same?’ Are we going to treat Mother Earth better and build a sustainable planet for our future generation?

On a brighter note, most economies are showing signs of phenomenal recovery. The automobile sector looks to be one of the biggest beneficiaries. Vehicular traffic on the road and the number of new vehicle registrations are a big indicator of the same. In fact, an Indian two-wheeler manufacturer broke its own export record in December 2020. Our belief has proved true again. The human race has endured many such pandemics throughout the years of evolution and evolved better, stronger, smarter.

Processing ELTs

Indogreen Enviro has been involved in the process of ELTs (End of life Tyres) for about a decade.

We have been witnessing the growth of the tyre recycling industry. From the 1970-2000, the majority of organised ELT recycling was about making ‘Devulcanised rubber reclaim sheets.’ These sheets are used in a wide range of applications like tyre re-treads, bicycle tyres, conveyor belts, rubber compounds to name a few.

From 2000 onwards the market started changing due to the introduction of radial tyres. The radial tyres had high tensile steel in them and now could not be grinded directly like the nylon tyres. They need new technology Shredders, Raspers, Granulators to make it ready for grinding. This decade saw many high technology shredding and granulation plants coming up across the country. This included India’s largest and fully automated 100 Mt/annum plant till date Vapi, Gujarat. These granulation plants created a new market for ELT granules-based playground tiles and mats. The CRMB(Crumb Rubber Modified Bitumen) also gained acceptance in large national road construction projects.

Batch type pyrolysis plants

From 2005 onwards, there was a new tyre recycling technology introduced to the Indian market - ‘Batch type pyrolysis plants.’ These plants were initially imported from China. Though profitable, they were extremely unstable, environmentally non-compliant and unsafe for operation. Due to their profitability ,By the year 2019,India had more than 1000 batch type-pyrolysis plants installed. The combined tyre requirement per day for these plants was about 10,000 Mt/day. That would mean a requirement of 10,00,000 passenger car tyres every day, to give a perspective. This monster had a huge appetite that could not be met with tyres from India. So these pyrolysis companies started looking for imported tyres with a perpetual supply possibility from round the globe.

There was only one challenge. The pyrolysis plants are not allowed to import tyres. The shredding companies were allowed to import with a license from DGFT. The batch type pyrolysis companies started buying container loads of tyres from the shredding companies. India started importing about 900,000 MT annually making it the largest importer of ELT in the world until July 2019.The Public Interest Litigation filed against the ‘Batch type pyrolysis plants’ put the brakes on these transactions. The government was forced to take cognisance of the humungous nature of the impending matter at hand.

This is the India story, but could be a similar story for any country from Asia where the Scrap Tyre disposal policy is not yet framed or implemented. I am taking the stance of the agitator than just being a mute spectator. There is so much that can be done than what is being done today.

Scrap tyre disposal policy

There is a strong buzz about ‘Circular Economy’ in Europe and the US. Large tyre companies and chemical giants are investing in various tyre technologies to bring the derivatives from the tyres to be reused in manufacturing new tyres. In India, we don’t even have a national scrap tyre disposal policy. Most local tyre companies are still waiting for an ‘EPR’ to start thinking of sustainable disposal. 

In fact, we as a country need ‘Circular economy.’ The responsibly recycled ELT can create high quality reclaim rubber, High calorific value oil with possibility on further hydro treatment to distil commercial grade diesel & petrol, commercial grade carbon black for manufacturing pigments, etc, liberated fibre to make thermoplastics, liberated gases that can be further processed, this can go on and on. There is so much of interest from large companies to set up plants to process this waste but they hesitate because of the lack of a government framework to support the huge capital investment required.

Despite all odds, some companies from India have done some amazing work in developing innovative ELT recycling technologies. A fine example would be Radhe Renewable Energy Development Ltd, Rajkot. They conceived, developed and now operate the ‘World Largest 100 MT Per Day Single Reactor Continuous Pyrolysis Plant ‘ for the last 8 years in Bhilwara, Rajasthan. No other company from around the globe can boast of this feat.In fact some of the large global giants who were looking for a commercial scale large continuous plant could not believe that such a plant and technology existed, that too from a non-descript town from India. This company now supplies ASTM grade Carbon Black and High Calorie fuel to Indian tyre industry beginning the ‘Circular Economy.’

Another interesting Company is Hotfut Sports, an award-winning sports infrastructure development and management company that has been one of the largest consumers of turf technology and synthetic turf products across its various formats. These products have a primary infill requirement of SBR rubber. HotFut has consciously been adapting its procurement process to ensure all SBR and infill / shock-pad requirements are sourced responsibly using recycled ELT’s / rubber scrap making all their facilities more environmentally friendly. They have structured solutions for forward thinking tyre companies wanting to pro-actively process their ELT with a win -win proposition. Many major tyre companies have found their solution very sustainable as well as profitable.

Last year, Internet was abuzz about this start up ‘Blink Green’ from Pune, India. They used ELT for making attractive ladies’ footwear and purses. They have found the utility of this wonderful waste and now is utilising her designing skill and the expertise of the cobble community to churn out beautiful, durable items for the domestic and global market.

These kinds of stories are emerging from all across the continent Imagine the power of scalability of these kind of products with the right kind of financial and marketing support.

I look forward to the day (soon) when we have the ‘Scrap tyre disposal policy’ is finally rolled out and the top tyre companies wait for the EPR policy is over. With a sizeable contribution coming out of their respective CSR budgets and ATMA’s able guidance, a national body to look at new & innovative sustainable disposal practices for ELT could be established. This would be a giant first step taken in the Asian subcontinent towards sustainable recycling of this incredible waste and thus setting a precedence for other countries to follow.

Kraton Corporation, a leading global producer of speciality polymers and high-value biobased products derived from by-products of pine wood pulping, has received an International Sustainability and Carbon Certification (ISCC) PLUS certification for its manufacturing facility in Niort, France.

Kraton can now supply 100 percent ISCC PLUS-certified AMS and AMS Phenolics resins using a mass balance attribution approach thanks to the certification. Kraton's dedication to promoting the biobased and circular economy is further demonstrated by the Niort facility's accreditation. Kraton is committed to lowering carbon emissions and accelerating the shift to a more sustainable future by empowering clients to include more environmentally friendly products into their supply chains.

An independent multi-stakeholder project, the International Sustainability and Carbon Certification (ISCC) is a leading certification method that guarantees accurate mass-balancing bookkeeping and reporting of renewable and recycled materials across the supply chain.

Lana Culbert, Kraton Pine Chemicals VP of Marketing, said, “Our SYLVARES™ and SYLVATRAXX™ brands feature a range of high-performance AMS and AMS Phenolics resins used in speciality adhesives and tyre applications. Our ISCC PLUS journey began in 2021 with the certification of our Sandarne, Sweden facility. Earning this certification for our Niort plant marks a significant milestone, further expanding our portfolio of sustainable solutions.”

Sumitomo Rubber Industries, Ltd. has said that it has clarified the process of rubber breakdown, a crucial element that affects tyre longevity, through joint research with Professor Gert Heinrich at Dresden University of Technology (Saxony State, Germany).

In a special session called ‘Combining Physics, Chemistry & Engineering of Rubber: A Symposium in Honor of Charles Goodyear Medalist Gert Heinrich’, which was held in honour of the Professor's medal-winning achievement, the findings were presented in an invited talk at the American Chemical Society, Rubber division, ACS 2025 Spring Technical Meeting held in Orlando, Florida, US, on 6 and 7 March. Professor Heinrich is a member of the Leibniz Institute of Polymer Research Dresden, which took part in the collaborative effort.

Tyre durability is determined by cracking processes, which result in the development of cracks and rips in a rubber substance. The endurance of rubber was previously mostly assessed using tearing tests, but there were still numerous unanswered concerns regarding the microscale structural alterations at the crack tip. This effort identified a factor that determines the start and propagation of cracks in rubber by analysing the force applied to a fracture tip using a simulation approach. In rubber, a crack tip undergoes dilatation deformation to create voids, or microvoids within the item. The fracture gets worse as the voids expand and come together. It was also discovered that the tension focused on the fracture tip is lessened when voids emerge.

The German Rubber Industry Association (Wdk) is advocating for a thorough and legally enforceable regulation of the end-of-waste status for Germany and the whole of Europe. The association is pusing for the circular economy to be strengthened for tyres.

Valuable secondary raw materials are still legally regarded as waste since there are no consistent standards for the end-of-waste status, according to Stephan Rau, Technical Director of the WDW. This restricts the market integration of sustainable recycled materials, impedes investments and creates legal uncertainties. “We call for a comprehensive and binding end-of-waste regulation for Germany and the whole of Europe to strengthen the recycling sector, facilitate investment in modern technologies, and sustainably reduce the CO₂ footprint of the rubber and tire industry,” he said.

In order to adhere to the prescribed waste hierarchy and stop illicit exports, Rau also emphasised that lawmakers must quantitatively and openly document waste tyre flows. He added that waste tyres should only be gathered by approved disposal companies and pre-sorted based on their intended use.

On the important role of mechanically recycled tyre granules and powder, Rau said, "This is an important secondary raw material that is already used in a variety of durable and safe products. A clearly defined end to its waste status must be made more economically viable. To ensure the market success of tyre granules, a risk-based approach to assessing chemical ingredients is essential. Binding limit values ​​must be assessed using a migration analysis, i.e. based on their bioavailability. Second, the use of tyre granule products must become mandatory in the construction industry and infrastructure projects. The goal is clear: Recycling must be economically viable."

Kuraray, a global speciality chemicals company and one of the largest suppliers of industrial polymers and synthetic microfibres, has received ISCC PLUS certification for its thermoplastic elastomers SEPTON and HYBRAR as well as Liquid Rubber produced at the Company’s Kashima Plant at Ibaraki Prefecture.

ISCC PLUS makes sure that certified products, such biomass and recycled raw materials, are appropriately handled throughout their supply chains, including the manufacturing process, by applying the mass-balance technique.

In the five years preceding up to its centenary in 2026, Kuraray is carrying out its medium-term management strategy, PASSION 2026. In order to achieve the long-term Kuraray Vision 2026 of being a speciality chemical company that grows sustainably by integrating new foundational platforms into its own technologies and contributing to customers, society and the planet, the company will keep growing its range of products that improve the natural and living environments.