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Roxul®1000 fibres have been widely used as a reinforcement product for friction materials. Especially in NAO/non-steel disc pad applications Roxul®1000 fibres are an important component of the new generation formulations. Besides reinforcement properties, it was not well understood what the effect of Roxul®1000 fibres on the friction performance is. This paper describes the effect ELS Roxul®1000 fibres have on the most relevant friction parameters of NAO/non-steel disc pad formulations. It has been observed that ELS Roxul®1000 fibres do not only improve the crack resistance of NAO/non-steel disc pads, but also improve various friction parameters. When including up to 20 volume% Roxul®1000 fibres in a basic NAO/non-steel disc pad formulation both pad and rotor wear are reduced over a broad temperature range, speed and pressure sensitivity are reduced significantly, (first) fade performance is improved drastically and also brake noise is reduced over a broad range of driving conditions.

A porous calcium silicate by the name of Promaxon®-D has been widely used in friction materials. Especially in NAO/non-steel (ceramic) disc pad applications, Promaxon®-D is an important ingredient of new generations of formulations. Except for its ability to increase porosity, the effect of Promaxon®-D on the friction performance was not well understood. This paper describes the effect of Promaxon®-D on the most relevant friction parameters of NAO/non-steel disc pad formulations. Promaxon®-D is a material which has been observed to be very effective at increasing the compressibility of friction materials. When added in the right percentage, Promaxon®-D can also be beneficial for parameters like friction level, fade resistance and recovery. This makes Promaxon®-D a versatile raw material for NAO/non-steel disc pad applications.