| 摘要 |
PURPOSE:To eliminate fluff and to enhance durability in a friction material by surface-treating said friction material by means of silane coupling agent, thereby strongly combining rock wool, cellulose fibers, and bonding agent. CONSTITUTION:A silane coupling agent consists of an amino silane such as an N-nu, nu-amino propyl trimethoxyl silane that is most reactive against phenol resin. When the coupling agent is used, it is dissolved in a suitable solvent such as metanol to the prescribed concentration of solid content. It is an effective method to dip a sheet of paper-base in the agent. Dipping of short time is good enough. The said paper-base should contain rock wool and pulp, and it is added with a suitable amount of powder filler. The said rock wool should be artificial non-crystal, inorganic fiber. The powder filler is combined to mainly improve the coefficient of friction. Inorganic filler includes red oxide etc. while organic filler includes organic cashew dust etc. Thus, the durability of a friction material can be enhanced by providing an additional process in which the agent is impregnated with the silane coupling agent. |
