JSR Corporation has been supplying an extensive range of products such as synthetic rubbers for car tyres, thermoplastic elastomers with the characteristics of both elastomers and plastics, and latex for paper coating. As part of its mid-term business plan “JSR20i9,” which started in April 2017, JSR Corporation is strengthening competitiveness for the future. It focuses on earnings drivers and profit expansion in SSBR, semiconductor materials and the Life Sciences Business.

The CASE mobility will influence the entire eco-system of the tyre industry. Requirements of tyres for the CASE mobility will be different from today, and raw material suppliers are now pushing themselves meet future demand. The tyres for the new mobility are expected to have high strength, wear resistance, with reduction of emissions. To meet these needs, the company used its proprietary synthesis technology to develop the new SBR with significantly improved mechanical strength compared to conventional SBR.  The new hydrogenated SSBR combines JSR’s unique polymerisation and hydrogenation technologies to control the number of unsaturated bonds in the material. “Through this process, it is possible to optimise the interactions among polymer molecules and minimise the stress produced in crosslinking. As a result, this new SBR has, not only approximately two times the mechanical strength of conventional SBR, but also exceeds the strength of natural rubber. Tyres using this new SBR as the tread compound rubber demonstrate more than 50 per cent better wear resistance along with low fuel consumption and grip performance compared to conventional SBR-equipped tyres,” said the company.

 “In the CASE, EV vehicle is heavier, that could also lead to higher abrasion that causes rubber microparticles pollution. This is the reason we are focusing on abrasion resistance in our polymer,’’ said Arai. Constant exposure to sunlight could reason for degradation of tyres, but the new hydrogenated SSBR prevents it, and also reduce the microplastic said Arai.

Being in production of synthetic rubber over 60 years, JSR Corporation has been a significant supplier of synthetic rubber solutions to global tyre companies.  Since JSR Corporation focuses on materials solutions, it has achieved a great deal of success with various tyres. JSR’s core technology is continuously improving polymerisation with its solid foundation of polymerisation technology, and the company’s polymer design already meets a wide variety of customer needs.

The company believes in speedy development and mass production. JSR works closely with its Tire Materials Technology Development Center at its Yokkaichi Plant to develop polymers, processes and establish mass-production technologies. It applies digital techniques for research and development and mass production technologies and utilises AI and big data to tackle improvements in speed and efficiency and achieve stable quality and mass production.  With technologically tailored solutions proposals, tyre manufacturers reduce tyre development time.

In the design and development analysis technologies, JSR uses its high-level analysis technologies to design and develop optimised materials tailored to each type of rubber compound.

Demand for low resistance tyres is growing by 10% every year, and JSR intends to cater to the demand with its functionalised SSBR solutions. According to Keisuke Miyoshi, managing director, JSR Elastomer Europe GmbH said, “The company provides the functionalised Solution SSBR that provides cutting edge technology and low rolling resistance. We plan to cater to the growing demand for low rolling resistance tyres across the globe. To cater to the growing demand for low rolling resistance tyres, the company has increased its production capacities of SSBR with plants in Japan, Thailand and Hungary.”

The total capacity of SSBR is around 220KT.

Being a supplier of a wide range of synthetic rubber solutions, JSR is into the production of a wide range of SSBR, from 1st generation to 5th generation. “Depending on the customer’s demand, we can supply different generation polymers,” said Miyoshi.

With its presence around the globe, JSR focuses on making products needed for the local requirement. The company runs a continuous product development programme based on its close communication with its customers globally.  “Japanese automakers are known for making fuel-efficient vehicles, and the same performance is also expected from tyre companies. While European automakers the required strong tyres, we leverage our technical expertise to make products suitable for the respective markets,” said Miyoshi.

JSR produces SSBR at three production sites, in Japan, Thailand and Hungary, which gives the company a unique logistical flexibility to support the global tyre industry. “We are the only synthetic rubber company which is spread globally in terms of synthetic rubber production and that gives us an edge over all our competitors. Customers may not find any difference in quality. Our strategic presence helps us to be more efficient in supplying products and service,” said Miyoshi

With six sales and technical offices in all major markets, the company promptly responds to tyre manufacturer requests timely

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.