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The asbestos free brake lining
WSM-3 Brake Pads/Brake friction material is a patented product of our company, with the patent number of 200510017406.1
Brake Pads/Brake friction material are mostly achieved by friction of friction pairs. It is a process changing kinetic energy to heat. The friction material as friction pairs is a safe and reliable guarantee of the brake at first. Brake shoe is the main part of mine hoist brake. If the friction coefficient of brake shoe and other performances can not meet the design requirements, there will be equipment or personal accident.
The Brake Pads/Brake friction material shoes used in our country are mostly made of asbestos materials, which are characterized by high melting point, large coefficient of friction, good mechanical strength and strong adsorption force to the adhesive. However the asbestos brake shoe has also some shortcomings that are difficult to overcome:
1. Due to poor thermal conductivity of asbestos, friction heat is difficult to disappear quickly, resulting in thickening of the thermal decline layer and increase of wear, as well as pollution to the environment, especially asbestos fiber dust will cause the body canceration;
2. In order to improve the friction coefficient and heat performance, high hardness abrasive and steel wool are used in most cases;
3. Asbestos may have strength decreased after completely dehydration and decomposition at in 650°C -700°C;
4. Asbestos is prone to "heat recession" of friction performance.
The asbestos free brake lining is used in diverse applications:
- disc brakes & shoe brakes for cable railway systems
- winder disc brakes
- calibre brake shoes
Name |
Test results |
Compressive strength (Mpa) |
48.8 |
Tensile strength(Mpa) |
12.64 |
Shear strength(Mpa) |
26.65 |
Charpy impact strength KJ/M2 |
6.9 |
Hardness(Shore D) |
80±5 |
Specific gravity g/cm2 |
1.97 |
Friction coefficient 100℃-200℃ |
0.159 |
1.WSM-3 brake Pads is a resin-based friction material, and used for reinforcing fibers and replacing asbestos, which is characterized by:
2.Free of steel wool and high hardness friction agent, low hardness, hard to damage the brake plate;
3.Free of asbestos, green and environmental-friendly;
4.Low wear, long service life.
With the growing awareness of environmental protection and self-protection, environmental-friendly non-asbestos brake shoe will eventually replace the asbestos brake shoe and have broad prospects. At present, WSM-3 environment-friendly non-asbestos brake shoe has been designated as the only supporting product by CITIC Heavy Machinery and enhanced the product status.
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