Mechanical brake friction plate containing aramid microfiber and preparation method thereof

Abstract

The invention relates to a mechanical brake friction plate containing aramid microfiber and a preparation method thereof. The friction plate is prepared from the following components by mass percentage: 8-14% resin, 3-6% aramid fiber with a length of 10-50μm, 20-45% friction enhancer, 10-20% wear reducer and Filling material 25-35%. The present invention is mainly based on this new type of material which has good dual functions of increasing friction and reducing friction to make a friction plate. Compared with the friction material made by conventional methods, its performance has achieved obvious improvement in wear resistance. Effect. It can reduce the wear rate by more than 35%. Aramid microfiber is a fine powdery material prepared from aramid fiber, with a fiber length of 10‑50 μm. It replaces aramid fiber as a reinforcing material for friction materials. Granulation technology can be used to prepare small particles of 1‑3 mm. Form a gradation with 3-5mm particles, and the friction material that is mixed and pressed has a large contact area and small gaps between particles, and the mechanical strength, friction stability and wear resistance of the friction material are significantly improved.

Description

technical field [0001] The invention relates to a friction plate and a preparation method thereof, in particular to a mechanical brake friction plate containing aramid microfiber and a preparation method thereof. Background technique [0002] Friction material is a multi-component composite material, which is widely used in brakes, clutches and friction transmission devices in various vehicles and machinery equipment. It is a material for transmitting and converting energy. The performance of friction materials directly affects the smoothness and safety of braking. sex. [0003] The performance of the friction material not only depends on the reasonable selection of each component material, formula design and corresponding molding technology, but also the distribution and structure of each component of the friction material has an important influence on the performance of the friction material. [0004] Friction materials mainly use phenolic resin or modified phenolic resin...

AI Technical Summary

Problems solved by technology

There are two major problems in the existing friction material preparation process: one is that the mixing of various components is not uniform enough, and the consistency of material properties is not good; the other is that the friction material components are mainly powder materials, and the operation process of mixing and molding There is dust flying, causing damage to both the environment and employees

However, the length of chopped aramid fibers used in friction materials is generally 3-5mm, and the fibers are entangled with each other. The dispersion effect is not good during granulation, and more bridging fluid is required. The diameter of granulation particles is generally too large, generally within 10mm. Left and right, when forming, relatively small diameter particles, the contact area between particles is small, the cohesive force between particles is small, the bond between friction particles is easily destroyed, the particles fall off and the wear rate increases, which affects the friction Material Friction Properties

Therefore, it is difficult to granulate the friction material with aramid fiber as the reinforcing material, and in order to ensure the performance of the friction material, more aramid fiber needs to be added, which increases the cost

Images