Tire nozzle aging can cause puncture

Recently, China Quality Association (Beijing) Quality Credit Assessment Center Co., Ltd., a well-known domestic rating agency, and the China Association for Product Quality jointly issued a quality credit rating of BBB for the domestic automotive tire industry, with a yellow warning color.

According to reports, the main problems of tire quality are the adhesive strength of the rubber valve pad and the tire body, the elongation at break, the strength performance, the allowable deviation of the specified friction coefficient, and the non-conformity or non-compliance of the tire mark.

In recent years, the quality of domestic automotive tires has generally shown a positive upward trend, but the increase has been general. In 2011, the quality inspection rate of spot-checked automobile tires was over 95%, and the quality pass rate was relatively high. However, there was a certain difference in the quality of automobile tires in various regions.

Why can a valve affect the tire's quality rating?

Zheng Yingliang, the general manager of Wenzhou New Triangle Wheeler Co., Ltd., who has 20 years of experience, believes that this is because the valve is small, but it can affect traffic safety.

It is understood that valve work when the wheel rotates, will be deformed by the influence of centrifugal force, such as the 195/70R14 tire at 100 kilometers per hour, the valve needs to withstand about 1.7kg of interference; if the tire is running 50,000 kilometers, the valve will follow The wheel turns 25 million times.

Most tire valves are rubber products. When the rubber changes to dark red, it indicates that it has deteriorated and cannot guarantee good airtightness. Therefore, each time the owner changes tires, the valve must be replaced at the same time.

For safety reasons, at present, high-end tires on the market have generally begun to use aluminum valves. Compared with rubber valves, this aluminum can greatly extend the use of time. Even so, the owner of the valve should pay great attention to the maintenance and maintenance of the valve, because the aging of the valve will cause the car to leak slowly, causing the car to grind damage, and even puncture.

It is understood that the industry quality credit risk level related to the vital interests of the people's livelihood is divided into four levels: A, B, C, and D from high to low. Each level is divided into AAA, AA, A, BBB, and BB according to different risk scores. , B, CCC, CC, C, D, and fine-tuned by "+", "-".