Friction material for drum type brake block

Abstract

The invention relates to a friction material for a drum type brake block and belongs to the technical field of friction materials. The friction material is mainly used for brake blocks of light and medium duty and passenger vehicles. The friction material consists of the following components: 14.5 percent of cashew nut shell oil modified rein, 19 percent of steel fiber, 2 percent of organic fiber, 4 percent of glass fiber, 6 percent of crystalline flake graphite, 3 percent of flexibilizer, 4 percent of rubber powder, 20 percent of barium sulfate, 10 percent of wollastonite, 6 percent of black iron oxide, 0.5 percent of zinc stearate, 2 percent of frictional powder, 3 percent of copper fiber, and 6 percent of potash feldspar. The friction material has the advantages that high temperature-resistant resin is used as adhesive, so that the friction material is high in high temperature heat fading resistance; the friction material and a metallic material which are low in hardness are used, so that a couple part is slightly damaged; and raw materials which are convenient to produce and obtain are used, so that the friction material is low in cost and suitable for China's actual conditions.

Description

technical field [0001] The invention relates to a friction material, in particular to a drum-type brake pad friction material, which is mainly used for the brake pads of light and medium-sized cargo and passenger cars. Background technique [0002] Traditional asbestos-based, semi-metallic, low-metal asbestos-free brake pad friction materials have problems such as low friction coefficient, not environmental protection, easy to generate noise during braking, and serious damage to the counterpart. The more advanced asbestos-free formula has made considerable improvements in some aspects, but there are also disadvantages in terms of high-temperature friction performance stability, service life, raw material costs, and production costs. Under the condition of increasingly tight raw materials and energy resources, professionals at home and abroad are developing some products that can take into account environmental protection and cost factors, and can also show superiority in ter...

AI Technical Summary

Problems solved by technology

[0002] The traditional asbestos-based, semi-metallic, low-metal asbestos-free brake pad friction material formulations have problems such as low friction coefficient, not environmentally friendly, easy to generate noise during braking, and serious damage to the counterpart.

The more advanced non-asbestos formula has made considerable improvements in some aspects, but there are also disadvantages in terms of high temperature friction performance stability, service life, raw material costs, production costs, etc.