What is the role of fillers in friction material products?
The correct selection of fillers is very important in determining the performance of friction materials and the manufacturing process. So, what is the role of fillers, which are indispensable in friction material products? Today, Hualong friction plate manufacturer will talk to you.
The role of fillers in friction materials is to improve friction and wear strength, physical and mechanical properties and reduce costs. Since there are many types of fillers with different functions, the actual influencing factors are complex. The shape of the filler significantly modifies the filling. Generally speaking, fibrous and flaky fillers are beneficial to the mechanical strength of organic materials, but detrimental to the molding and processing performance; spherical fillers, on the contrary, improve the molding and processing performance of the material, but degrade it. Mechanical strength of material.
Within a certain range, the smaller the particle diameter of the filler, the greater the adsorption effect of polymer molecules on the filler. At the same dosage, the finer the particles, the higher the activation performance, and the stronger the interface between the resin and filler is combined; the finer the particles, the greater the improvement in the rigidity, impact, tensile strength, dimensional stability and appearance of the product.
There is a difference between the density of the friction material and the density of the filler, and this difference in density prevents the filler from being evenly dispersed in the resin. Therefore, it brings difficulties to mixing and molding processing. In order to improve the affinity between the filler and the resin, it is sometimes necessary to activate the filler. Coupling agents are a type of organic substances that are fixed on the surface of inorganic fillers through chemical reactions to form a covering layer. The inorganic substances treated with them have affinity for organic substances, thereby enhancing the bonding of the two materials.
