Bridgestone Corporation successfully built tyres with 100% of its natural rubber-containing components derived from guayule, a desert shrub that grows in arid regions. Built at the Bridgestone Technical Center in Japan, the tyres were constructed using the guayule natural rubber cultivated by Bridgestone at its Biorubber Process Research Center (BPRC) in Mesa, Arizona, US.
Bridgestone built similar passenger tyres at its operations in Rome, Italy earlier this summer. In those tyre builds, all of the tyre’s major natural rubber components — including the tread, sidewall and bead filler — were replaced with natural rubber extracted from guayule grown and harvested by Bridgestone.
Bridgestone’s future research endeavors will focus on optimizing the natural rubber content in each guayule shrub, as well as evaluating applications in a wider range of tyre types and rubber compounds.
Guayule grows in the Southwestern U.S. and Mexico, and the natural rubber made from guayule is a plant-derived biomaterial similar to the natural rubber harvested from the Hevea brasiliensis rubber tree. As guayule grows in arid regions, as opposed to the tropical regions where the Hevea brasiliensis rubber tree is found, the further development of guayule rubber is anticipated to contribute to the diversification of natural rubber sources.
After securing a plot of agricultural land in Eloy, Arizona, with an area of 114 hectares or approximately 281 acres, the Bridgestone Group established a research farm to employ advanced breeding practices and develop guayule cultivation techniques.
The Bridgestone Agro Operations Research Farm opened in September 2013. One year later, Bridgestone opened the BPRC and established, in-house, all processes necessary for developing guayule natural rubber for use in tyre applications, including research and development, experimental production, and manufacturing.
The Bridgestone Group will continue its research activities with guayule and various other raw materials with the aim of achieving its long-term environmental vision of shifting towards 100% sustainable materials in tires by 2050.