High-end tire breaking technology**

—— The second-prize record of National Science and Technology Progress Awards The ultra-high-performance car radial tire assembly technology Since the 1990s, ultra-high performance passenger car radial tires (UHPTs) have become the industry's best handling, anti-slip, and low-noise performance. Europe and the United States tire industry technology development mainstream. However, its manufacturing technology has long been monopolized by tire giants such as Michelin, Bridgestone and Goodyear. In order to break through the foreign technology blockade, Linglong Group Co., Ltd., Beijing University of Chemical Technology and Jilin University jointly implemented the low-profile anti-slip, low-noise super-high-performance passenger car radial tire project, and mastered the full-scale production technology for ultra-high performance passenger car radial tires. Delicate Group has now achieved UHTP tire serialization and large-scale production.

Wang Feng, general manager of the project and general manager of Linglong Tire, told reporters that at the beginning of the project, there was no domestic manufacturer capable of producing the lowest-profile 25 series products. Through joint technological research, they have completed the development of UHPT and serialized mass production of 54 patterns in 5 patterns, with a section of 25 series, a speed grade of Y (300km/h), and an annual output of 2 million UHPTs. Production line.

Through independent research and development, researchers have formed a complete set of mature UHPT production technologies with core technologies, including product structure design, formulation design, process and performance research. Major production equipment such as specific molding machines, vulcanizers, and tire room noise labs that meet the requirements of low-profile and large-scale rims are developed, produced and built by Linglong Group, and the equipment performance has reached the international advanced level.

Wang Feng said that this project has filled the domestic gap and reached the international advanced level, which has played an exemplary role for the domestic tire industry. Driven by high-tech products such as ultra-high-performance passenger car radial tires, Linglong Group has become the top 16 tire companies in the world with an annual sales income of 15 billion yuan and an export value of over US$800 million. The project has obtained 1 invention patent and 7 appearance patents, 4 science and technology awards, and 4 related national standards.

According to Dong Maohua, a senior engineer of Linglong Tire, the project has achieved innovation in a number of key technologies, pioneering a high-inclusion carcass structure, forming a super-high performance radial tire structural design technology, and inventing a low-profile manufacturing process. It solves the key technical problem of tire sidewall cracks. They developed the preparation technology of nano-silica/solvent-polymerized styrene-butadiene rubber (NBR) nanocomposites, which solved the technical difficulties of nano-silica that are difficult to disperse and cannot be filled in large quantities.

Dong Maohua said that the project built the first indoor noise laboratory in the domestic tire industry, developed a low-noise pattern design technology, and formed a simulation prediction technology for tire handling performance, improving the handling performance of the tire. They also presided over the drafting of a national standard for testing the anti-slip performance of passenger tires.

It has been tested by third-party international authoritative organizations such as the German Rhine and American STL, and all products have passed the EU ECE quality certification. The tire's resistance to slippery, durable, noise and other major performance are better than the comparison of world-class tires, and cost-effective, competitive in the international market. Products are currently exported to more than 40 countries and regions such as Europe, the United States, Japan, and Australia. They are used in Mercedes-Benz, BMW and other luxury cars, breaking the monopoly of foreign tire giants in this high-end technology field. In response to the implementation of so-called anti-dumping measures against Chinese tires by some countries, they have taken the initiative.

Experts commented that the project's technology was original and advanced, and it took the lead in indoor noise testing in China, significantly reducing noise, reaching the level of the world's brand-name products, and taking the lead in carrying out the simulation analysis of the handling performance of tires as a whole and matching the entire vehicle. To reach the international advanced level.

It is understood that Horizon Tire, Inc., one of the 50 largest tire distributors in the United States, sold 398,000 exquisite performance tires in the past three years. The company said that the tires have good performance indicators and are very popular in the local area. European tire distributors believe that exquisite performance tires are cost-effective and very competitive locally.

Wang Feng, general manager, said that exquisite will take the ultra-high performance anti-slip radial car radial R & D as an opportunity to increase scientific and technological innovation and technological transformation, and accelerate the "R & D into products, product formation capacity" to achieve ultra-high performance Meridian The serialization and large-scale production of tires will increase the competitiveness of Chinese tires in the international market.