Friction Behavior of Clutch-Facing Materials: Friction Characteristics in Low-Velocity Slippage

A study was made of details of friction characteristics of several kinds of clutch-facing materials of resin mold type. With particular attention given to the low-speed slip area, the following was made clear: There exists a thin film on the friction surfaces of facing and mating materials. A thin film is presumed to be a visco-elastic substance which is susceptible to momentum and affects, to a great extent, friction and wear characteristics.