In the whole automobile industry, brake pads are a kind of pivotal and indispensable parts. If it is missing, the car on the road driving safety will not be guaranteed, and the product is the safety parts and wear parts. Under normal circumstances a car should be replaced at least two sets of brake pads each year, so the development of friction materials products, especially the development of environmentally friendly non-asbestos friction material brake pad products, in line with the trend of the times market prospects are very broad, the economic benefits are considerable!
The main material of brake pads is made of various kinds of fibers (asbestos, composite fibers, ceramic fibers, steel fibers, copper fibers, aramid fibers, etc.) as the base material, and organic and inorganic powder fillers are mixed with resin as the binder and bonded together.
The basic quality requirements of brake pads are: wear resistance, large coefficient of friction, and excellent heat insulation performance.
According to different manufacturing materials, brake pads can be divided into asbestos pads, semi-metallic pads and NAO (non-asbestos organic material) pads. According to the different braking methods, brake pads can be divided into two types: disc brake pads and drum brake pads.
The first generation: asbestos type brake pads: 40%-60% of their composition is asbestos. The main advantage of asbestos pads is that they are cheap. The disadvantages are.
A Asbestos fiber may cause lung cancer. It does not meet modern environmental requirements.
B Asbestos has poor thermal conductivity. Usually repeated braking will cause heat to build up in the brake pads, and when the brake pads get hot, their braking performance will change.
Second generation: Semi-metallic brake pads: mainly using rough steel wool as the reinforcing fiber and an important mixture. The main advantage of semi-metallic pads is that they have a high braking temperature due to their good thermal conductivity. The disadvantages are.
A higher braking pressure is required to accomplish the same braking effect.
B Especially in the low temperature environment, the high metal content on the brake disc wear, while generating more noise.
C brake heat is transferred to the caliper and its components, will accelerate the caliper, piston seal and return spring aging.
D Improperly handled heat reaching a certain temperature level will lead to brake shrinkage and brake fluid boiling.
Third generation: Asbestos-free organic NAO type brake pads: mainly using glass fiber, aromatic polyamide fiber or other fibers (carbon, ceramic, etc.) as reinforcement material.
The main advantages of NAO pads are: maintaining good braking effect no matter at low or high temperature, reducing wear and tear, reducing noise, and extending the service life of brake discs. It represents the current development direction of friction materials. Can brake freely in any temperature. Protect the driver’s life. And maximize the life of the brake disc. Most of the brake pads on the market today use the second generation of semi-metallic friction materials and the third generation of ceramic brake pads.
Santa Brake is a professional manufacturer of brake discs and pads in China, with more than 15 years of experience, our products are sold well in China, the United States, Europe, Latin America, Australia and many other countries and regions. Welcome customers’ inquiry.
Post time: Feb-28-2022