| 摘要 |
PROBLEM TO BE SOLVED: To obtain a friction material which reduces the generation and sound pressure of an abnormal sound of about 200-300 Hz generated when the absolute humidity is high or after all-night parking by compounding a fibrous substance, a binder, and a friction modifier essentially containing trisodium phosphate. SOLUTION: Preferably, trisodium phosphate is contained in an amount of 0.08-10.5 wt.%, based on the composition, and has an average particle size of 0.1-100μm. Examples of the fibrous substance are steel fibers, copper fibers, aramid fibers, and potassium titanate fibers. Examples of the binder are a phenol resin, an epoxy resin, a melamine resin, and a rubber such as NBR or SBR. The friction modifier is e.g. an organic friction modifier such as rubber dust or cashew dust or an inorganic modifier such as barium sulfate, graphite, or antimony trisulfide. Preferably, the composition contains 30-60 wt.% fibrous substance, 3-20 wt.% binder, and 21-66 wt.% friction modifier.
|
