The glass fibers increased the surface hardness and contact stiffness of the friction material but decreased compressing, friction level, and fade resistance. Wear resistance slightly improved with glass fibers at moderate temperatures, whereas it decreased at temperatures beyond the glass transition temperature of the binder resin. Friction oscillation during sliding changed its mode from stick–slip to harmonic oscillation as the velocity increases and was followed by smooth sliding at higher velocities beyond a critical value. Friction-induced vibrations occurred over a wider velocity range when the friction material contained chopped glass fibers, indicating higher propensity of brake-induced noise. Surface analysis after friction tests revealed that contact stiffness of the friction material surface increased due to promoted contact plateaus fostered by the chopped glass fiber bundles.

Fiberglass Chopped Strand was the main raw material for produce brake lining,pad,clutch and other friction material.Fiberglass Chopped Strand is the new product for replacement of asbestos for environmental protection property.It was widely used in the field of auto industry.motorcycle,automobile,locomotive and aeroplane.

Fiberglass Chopped Strand was treated by saline coupling agent,which makes it has excellent dispersity and composition with other inorganic materials and resin for making friction materials.with specification of excellent properties of stability ,low rate of friction loss and good heating conductivity.