In the field of tire technology, Zhongce Rubber and Haichao Rubber have made important breakthroughs.
According to information from the State Intellectual Property Office on April 17, 2026, Zhongce Rubber Group Co., Ltd. and Hangzhou Haichao Rubber Co., Ltd. applied for a patent titled “A design method, application and tire for passenger car tires with improved high-speed performance”, with the authorization announcement number CN116494687B, and the authorization announcement date is April 14, 2026.
The patent relates to the field of tire design technology and aims to improve the high-speed performance of passenger car tires.
A passenger car tire with improved high-speed performance, including a tread, a nylon belt, a steel belt, a sidewall, a carcass ply, an inner liner and an apex rubber.
By examining the dry heat shrinkage rate C (%) of the nylon belt, the stretch rate A and B values of the nylon belt at the tire shoulder and crown center are calculated and designed to achieve the purpose of improving the high-speed performance of the tire.
Among them, the dry heat shrinkage rate of the nylon belt layer is C%, A is the stretch rate of the nylon belt layer at the center of the tread crown, and B is the stretch rate of the nylon belt layer at the tire shoulder end points; A, B, and C satisfy the following relationships: A = Dc/d, A = Ds/d, C/100 + A ≤ 1.12, C/100 + B ≥ 1.12.
Here, Dc is the diameter of the nylon belt at the center of the tread crown, Ds is the diameter of the nylon belt at the shoulder end, and d is the laying diameter of the nylon belt during the production of the green tire.
Zhongce Rubber is a leading company in the domestic tire industry. It was established on June 12, 1992 and will be listed on the Shanghai Stock Exchange on June 5, 2025. Its registration place and office are both in Hangzhou, Zhejiang Province.
Its core business is the processing and manufacturing of tires and rubber products, and it has profound technology accumulation and extensive customer resources.
In 2025, Zhongce Rubber’s operating revenue reached 44.956 billion yuan, ranking first among the four companies in the industry, far exceeding the second place Taikaiying’s 2.581 billion yuan, higher than the industry average of 12.307 billion yuan and the median of 1.782 billion yuan.
Among the main businesses, tires accounted for 87.24%, accounting for 39.22 billion yuan.
In the same year, the net profit was 4.147 billion yuan, also ranking first in the industry, far exceeding the 352 million yuan of second-place Megashares, higher than the industry average of 1.17 billion yuan and the median of 263 million yuan.
Zhongce Rubber Group Co., Ltd. has made fruitful achievements in patents recently. It has a number of invention patents and appearance patents, covering many fields such as aviation tire high-speed durability equivalent test methods, all-steel load-carrying radial tires, wear-resistant and high-temperature resistant tread rubber compositions.
Hangzhou Haichao Rubber Co., Ltd. was established on December 29, 2014. It belongs to the rubber and plastic products industry and the scale of the enterprise is large.
The company also has numerous patents covering silent tires, rubber compositions with open-structured silica networks, methods for calculating the stiffness contribution of tire components, and many other aspects.
The continuous innovation and patent achievements of these two companies in the field of tire technology will not only help improve their market competitiveness, but also promote the technological progress of the entire tire industry and provide consumers with safer and higher-performance tire products.
In the future, we look forward to them bringing more technological breakthroughs and innovations.
