... rubber), Styrene-Butadiene Rubber (SBR), Polybutadiene Rubber (PBR), Carbon black, Nylon tyre cord, rubber chemicals, steel tyre cord and Butyl rubber.Stages in Recycling:Crumb: Rubber Crumb ... is the material resulting from granulating scrap tyres into uniform rubber ... of tyres in the following way:1. Rubber Crumb - floor mats, belts, gaskets, shoe soles ...