Friction material without asbestos and producing process

Abstract

The friction material without asbestos consists of modified phenolic resin, iron ore powder, re-burnt magnesite, alumina, clinostrengite powder, silica, barytine, wollastonite, carbon black, calcium carbonate, graphite, tire powder, zinc stearate, plant fiber, sepiolite and steel fiber. Using plant fiber and sepiolite to replace asbestos and glass fiber separately can eliminate the harm of asbestos and glass fiber to human health. The friction material has the features of high tensile strength, high toughness, heat resistance, and stable heat decay performance, and may be used in friction wafer for common vehicle and heavy truck.

Description

technical field

[0001] The invention relates to the material manufacturing technology of brake friction linings for motor vehicles and mechanical braking control, especially the material manufacturing technology of medium and heavy-duty automobile drum brake friction linings. Background technique

[0002] In the traditional friction material manufacturing technology, asbestos is one of the main raw materials used to manufacture automobile brake friction linings, and its content is as high as about 50%. However, asbestos has been recognized as a carcinogen, which is very harmful to human health, and asbestos dust also causes serious pollution to the environment. In addition, asbestos friction materials also have problems such as high hardness, thermal expansion, and thermal decay in terms of performance. Therefore, people began to develop non-asbestos friction materials more than 20 years ago as a substitute for asbestos friction materials. Judging from the current situatio...