In April 2026, information from the State Intellectual Property Office showed that Linglong Tire Co., Ltd. applied for a patent titled “A special bead component and design method for preventing ring bursts.”
The application publication number is CN121893705A, the application number is CN202610088625.0, the application publication date is April 21, 2026, and the application date is January 22, 2026.
The patent summary shows that this invention belongs to the field of tire structure technology.
It discloses a special bead component for preventing bead burst, which includes a carcass steel wire layer and a wire ring arranged along the outside of the carcass steel wire layer. An independently formed compartment isolation layer is fixed between the carcass steel wire layer and the steel wire ring.
This invention takes “directionally restrained fracture steel wire + active dissipation of fracture energy” as the core design concept, and achieves a fundamental change in the bead failure mode by constructing a composite system of “divided isolation structure + sacrificial buffer layer”.
The compartment-type isolation structure divides the wire ring into multiple controllable fracture units through periodic honeycomb-shaped longitudinal isolation bars and independent closed isolation compartments, effectively blocking the lateral expansion of cracks; the sacrificial buffer layer uses the deformation ability of low-hardness flexible rubber to actively absorb the impact energy generated by steel wire fractures and reduce the risk of chain fractures, thus completely abandoning the traditional passive defense idea of “reinforcement and anti-fracture”.
Linglong Tire was founded on June 6, 1994 and listed on the Shanghai Stock Exchange on July 6, 2016. It is a leading enterprise in the domestic tire industry. It focuses on the automobile tire business, has advantages in the entire industry chain, and has significant investment value.
Its main business is the design, development, manufacturing and sales of automobile tires. The Shenwan industry it belongs to is automobiles – auto parts – tires and wheels, and it belongs to the net-breaking stocks, sports industry, and tire concept sectors.
In 2025, Linglong Tire’s operating revenue reached 24.642 billion yuan, ranking third among the 12 companies in the industry, higher than the industry average of 11.62 billion yuan and the median of 4.337 billion yuan. There is a gap with the first Zhongce Rubber, 44.956 billion yuan, and the second-placed Sailun Tire, 36.792 billion yuan.
Among the main businesses, tire product revenue was 24.475 billion yuan, accounting for 99.32%.
Net profit was 1.369 billion yuan, also ranked third in the industry, higher than the industry average of 922 million yuan and the median of 294 million yuan. There was a gap with the first place Zhongce Rubber, 4.147 billion yuan, and the second place Sailun Tire, 3.617 billion yuan.
In addition, Shandong Linglong Tire Co., Ltd. has recently applied for a number of patents.
For example, there are many invention patents such as “a visual warping roller detection device” and “a sample preparation method for tire flexural fatigue testing to keep the tire shoulder groove intact”.
These patents cover multiple links and technical fields of tire production, fully reflecting Linglong Tire’s continuous investment and innovation capabilities in technology research and development.
This series of patent achievements will not only help improve Linglong Tire’s product quality and performance, but will also further consolidate its competitive position in the tire market and provide strong technical support for its expansion into the international market.
