Once, both brake linings and former brake pads were used to be produced mostly with asbestos, an highly heat resistant, but extremely carcinogenic material. For this reason, along the years, asbestos-based materials, have been gradually substituted by organic compounded friction linings, mainly for the automotive sector, based on mixtures of synthetic fibres and metals or alloys, such as copper, brass, steel, abrasive inclusions, the whole of them being alloyed by resins.
