Natural rubber is obtained from latex, a natural secretion of certain plants. Latex is composed of long polymer chains which must be partially broken between rollers or rotating blades to soften or grind the rubber before adding compounding ingredients. Compounded rubber is then sheeted, extruded in a specific shape, applied as a coating, or molded for vulcanization.
Pierce-Roberts uses natural rubber in products such as belting, hoses, tubing, insulators, valves, and gaskets. Natural rubber can withstand low temperatures which allow the material to bond easily with metal parts. Additionally, natural rubber parts have a high resistance to tear and abrasion.