What are the friction materials of brake pads
The application of friction materials in brake pads is an essential element, the following Huaruifeng brake pad manufacturers to introduce you to brake pad friction materials, I believe that after reading this article we have a better understanding of brake pad friction materials.
Friction material belongs to polymer ternary composite material, which includes three parts: polymer compound as binder; With inorganic or organic fiber as the reinforcing component; The filler is used as a friction property regulator or a compound.
1.Organic binder
The organic binders used for friction materials are phenolic resin and synthetic rubber, and phenolic resin is the main one. Their characteristics and function is that when at a certain heating temperature, it first softenes and then enters the viscous flow state, resulting in flow and uniform distribution in the material to form the matrix of the material, and finally through the rubber vulcanization of resin curing, the fiber and filler bond together to form a dense texture with considerable strength and can meet the performance requirements of friction materials. The quality requirements for resin are:
(1)Good heat resistance, better thermal decomposition temperature and lower thermal weight loss.
(2) The fineness of the powder resin is high, which is conducive to the uniformity of the mixture dispersion and can reduce the amount of resin in the formula.
(3) Free powder content is low.
(4) Suitable curing speed and flow distance.
2. Fibre reinforced material
The fiber reinforced material constitutes the base material of the friction material, which gives the friction product enough mechanical strength to withstand the load force of the grinding and riveting processing of the friction sheet in the production process, as well as the impact force, shear force and pressure generated by the braking and transmission during the use of the friction sheet. According to the actual working conditions of the friction plate, the corresponding mechanical strength requirements of the friction plate are put forward by the relevant standards and automobile manufacturers in China. Such as: impact strength, bending strength, compressive strength, shear strength, etc. In order to meet these strong performance requirements, it is necessary to select suitable fiber varieties to increase and meet the strength properties.
Friction materials for its use of fiber components requirements
(1) The enhancement effect is good.
(2) Good heat resistance. There is no fusing, carbonization and thermal decomposition at the friction operating temperature.
(3) It has a basic friction coefficient.
(4) The hardness should not be too high to avoid brake noise and damage to the brake disc or drum.
(5) Good process operability.
3.filler
The filler in the friction material component is mainly composed of a friction property regulator and a compounding agent. The purpose of using fillers is mainly in the following aspects
(1) Adjust and improve the friction properties, physical properties and mechanical strength of products
(2) Control product thermal expansion coefficient, thermal conductivity, shrinkage rate, increase the stability of product size
(3) Improve braking noise of products
(4) Improve the manufacturing process and processing properties of products.
(5) Improve product appearance quality and density
(6) Reduce production costs
