Do you know what components make up a brake pad?
Brake pad materials are generally divided into four parts: binder, reinforced fiber composition, friction performance modifier, and four parts: packaging binder is one of the most important components of friction materials. It can restore material performance after degradation. impact, wear properties and mechanical properties.
Usually there are thermosetting and thermoplastic, rubber, and composite materials. Commonly used friction materials for brake pads are thermal adhesives. Specific applications include phenolic resin, melamine resin, epoxy resin, silicone resin, polyamide resin, etc.
The most widely used is phenolic resin and its modified resin. The purpose of modification is to improve the high temperature performance of the resin. In order to improve the high-temperature performance of adhesives, polyimide resin has been used in advanced automotive friction materials. However, the cost of the resin is too high and it is not easy to popularize.
It is a fiber-reinforced friction material that also plays the role of the friction reinforcement base of the main component. Compared with traditional materials such as asbestos and other mineral fibers, steel fibers used in semi-metallic automobile friction materials are added with a small amount of copper fiber and a small amount of copper fiber is added at the same time. In recent years, there have been more and more types of reinforcing fibers, the most eye-catching of which is the application of aramid fibers.
The addition of organic fibers can reduce the density of the material, reduce wear, and at the same time reduce the friction coefficient of the material. In order to improve the stability of friction materials in different temperature ranges and the affinity between fibers and binders, various fibers are often used in practical applications.
