One of the main components of friction materials, fiber reinforced materials
The requirements of friction materials on the reinforcing fiber components used are:
1. It has an obvious effect of increasing the strength of the product.
2. Good heat resistance, no serious heat decay under the friction working temperature.
3. Has a basically stable coefficient of friction
4. The hardness should not be too high to avoid braking noise and damage to the dual, such as brake discs or brake drums.
5. The process has good operability.
6. No serious harm to the process environment and use environment.
Because friction materials are under high temperature conditions during work for a long time, friction materials mostly use inorganic fibers, including natural mineral fibers, such as asbestos fibers, sepiolite, wollastonite, etc.; artificial mineral wool and inorganic fibers, such as Ceramic fiber, aluminum silicate fiber, rock wool slag wool, glass fiber, etc.; there are also metal fibers, such as steel fiber, copper fiber, aluminum fiber, etc.
In addition to inorganic fibers, some organic fibers are also used in friction materials, such as aramid, which is a high-performance, high-priced fiber with excellent heat resistance and tensile strength. Aramid fiber is widely used in the friction material industry at home and abroad, especially in products that require high performance. Carbon fiber is used in aviation brake pads or other friction material products that require high heat resistance and strength. middle. Some other organic fibers, such as cellulose fibers, man-made organic fibers or synthetic fibers, plant fibers and active NG-1 organic fibers, are also used in many applications, but they are mainly used as auxiliary reinforcing components.
In recent years, acrylic fiber has been emphasized because of its characteristics and strength, and it has also begun to be used. Acrylic fiber is acrylonitrile fiber, which has strong chemical resistance and good fine and tough structure. Acrylic acrylic fiber has higher heat resistance. It is a carbon fiber precursor, which can withstand a high temperature of 240°C in a short time without melting.