| 摘要 |
Composition friction materials particularly adapted for use in making railroad brake shoes include an elastomer such as synthetic rubber or natural rubber. The elastomer forms part of a bond for the remaining friction ingredients. The elastomer, solvent and nonsolvent absorbing granular abrasive materials of the composition are mixed in a manner such that the elastomer is quickly reduced to a paste-like consistency to which the remaining ingredients are added and mixed to form pellets which can be conveniently formed into brake shoes.
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