Friction coefficient is one of the most important technical indicators of friction materials, and it determines the basic braking torque of the brake pads. Usually it is not a constant, but varies with temperature, pressure, speed or surface conditions and friction environment. When affected by these factors, the friction coefficient changes less, which is the ideal friction coefficient. National standards strictly require manufacturers to indicate the coefficient of friction on the packaging. The coefficient of friction must be appropriate. Too high will cause the wheels to lock up, loss of direction control and film burning during braking, while too low will cause the braking distance to be too long. For example, the friction coefficient of a ceramic brake pad is 0.40, and the friction coefficient of a nanofiber brake pad of an automobile brake pad brand is 0.36, which is ideal.

The quality of automobile brake pads is directly related to the reliability of automobile brakes. In addition to 100% safety, car owners always want braking comfort, sensitivity, noiselessness and smoothness. For brake pads, the most important thing is to choose the friction material, which basically determines the braking performance of the brake pads.

When braking, especially during high-speed driving or emergency braking, the brake pads will generate instantaneous high temperature. At high temperatures, the friction coefficient of the friction plate will decrease, which is called thermal attenuation. High thermal attenuation determines the safety during high temperature conditions and emergency braking. The friction plate maintains its stability and recovery performance under various working conditions, which requires good heat resistance. It can still maintain stable performance at high temperatures. The sensitivity is low under different humidity and immersion conditions, and it can recover as soon as possible after draining. performance. At the same time, it must have good physical and mechanical properties, not only to meet the requirements of the processing process, but also to maintain good performance.

Friction materials can be divided into 4 types from the basic materials of asbestos, NAO type (ie non-asbestos organic type), semi-metal and special fibers. In 1999, my country banned the use of asbestos in friction discs. At present, semi-metallic friction materials are widely used in China, mainly steel wool or copper materials.

Comfort is a direct manifestation of friction performance, including brake feel, noise, dust, smoke and odor. With the increase of private cars and the improvement of people's living standards, comfort has become an increasingly important indicator of friction linings under the basic premise of meeting safety. In terms of comfort indicators, car owners often care about the noise of brake pads.

Maintaining sufficient mechanical strength at room temperature and high temperature is an important factor affecting the reliability of friction linings, but at the same time it is required not to scratch the brake disc or drum. Its wear resistance is the main factor affecting durability. The main factors affecting wear during use are pressure, speed and temperature, of which temperature is very important.

The above is all the contents introduced by the manufacturer of Huai'an automobile brake pads. For more knowledge about brake pads, please come to consult!