| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc brake pad resistant to extreme temperature rise and also high load by combining a specified friction material, a specified heat insulating material, and a back plate. SOLUTION: Friction material 1 contains 15 vol.% or more of iron fiber or powder and grain resistant to high load, 20 vol.% or more of graphite powder or powdery matter according to this, and a binder and a friction regulating agent. As a back plate 3, iron is mainly used, but other materials such as ceramics, fiber-reinforced material, and the like can be used. A heat insulating material 2 is used between the friction material 1 and the back plate 3, and the heat insulating material 2 contains 15 vol.% or more of carbon in order to suppress heat conduction and 15 vol.% or more of iron fiber or powder and grain in order to minimize the difference in thermal expansion with the friction material 1 as much as possible. As the carbon, a one having low heat conductivity such as coke, coal, carbon black or charcoal is preferably used.
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