Recently, Sailun Group has made new breakthroughs in the field of tire manufacturing technology.
Information from the State Intellectual Property Office shows that Sailun Group Co., Ltd. has applied for a patent called “Intelligent sidewall film lamination method and system based on tension-width decoupling control”. The application publication number is CN122185622A, the application number is CN202610293694.5, the application publication date is June 12, 2026, and the application date is March 11, 2026.
The core of this patent is to use the real-time online measurement of the width of the sidewall film as the main controlled variable, and its deviation from the target width as the input, to dynamically calculate the optimal tension setting value through the outer loop controller; use the inner loop controller to quickly and accurately track the set value, adjust the actual laminating tension, thereby constructing a cascade control closed loop with width as the master and tension as the slave.
This innovative method actively compensates for the Poisson shrinkage effect of the material by introducing the final quality characteristics into the real-time control loop, achieving collaborative optimization of fitting quality and dimensional accuracy, stably improving quality control from an open-loop process to a closed-loop result guarantee, and forming digital process knowledge that can be deposited and traced, significantly improving the consistency of tire products and the intelligence level of the manufacturing process.
Sailun Tire was established on November 18, 2002 and closed on June 30, 2011.
It was listed on the Shanghai Stock Exchange on the same day, and its registered address and office address are both located in Qingdao City, Shandong Province.
It is a leading domestic tire manufacturer with obvious advantages in the field of semi-steel radial tires and masters intelligent production technology.
Sailun Tire’s main business is the research and development, production and sales of tire products. The Shenwan industry it belongs to is automobiles – auto parts – tires and wheels. Its conceptual sectors include procyclical, smart cars and S&P Dow Jones China.
In terms of performance, Sailun Tire’s operating income in 2025 was 36.792 billion yuan, ranking second in the industry (22 companies in total), higher than the industry average of 10.395 billion yuan and the median of 5.119 billion yuan. The first place, Zhongce Rubber, was 44.956 billion yuan.
Among them, tire product revenue was 36.403 billion yuan, accounting for 98.94%.
In terms of net profit, Sailun Tire’s net profit in 2025 was 3.617 billion yuan, ranking second in the industry, higher than the industry average of 701 million yuan and the median of 294 million yuan. The first place, Zhongce Rubber, was 4.147 billion yuan.
The recent patent situation of Sailun Group Co., Ltd. is rich and diverse, covering multiple aspects of tire manufacturing.
For example, there are related patent applications in areas such as tire pitch number determination, inner lining bevel knife width calibration, and communication link health status diagnosis.
These patents not only reflect Sailun Group’s continuous investment in technological innovation, but also provide strong technical support for its competition in the tire market.
In general, the patents related to the sidewall fitting system applied by Sailun Group this time are expected to further enhance its competitiveness in the field of tire manufacturing and provide consumers with higher-quality tire products.
At the same time, the layout of its multiple patents also shows the comprehensiveness and forward-lookingness of Sailun Group in technology research and development. It is worth looking forward to more achievements in the tire industry in the future.
