Continental Tire is 5-10 Years from Dandelion Tires

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Continental Tire the Americas LLC says in the next decade the tire maker expects to sell tires made from a flowering weed — the dandelion.

“Our target is within the next 5 to 10 years,” says Peter Zmolek, director of research and development of passenger and light truck tires for Continental Tire the Americas. “In the summer of 2014, Taraxagum tires were produced and tested under summer and winter conditions on our proving grounds in Germany and Sweden. The results were very encouraging and our continued development efforts are on track.”
The initial tests run so far demonstrate that the tire made from Taraxagum show an equivalent, “property profile” when compared to tires made from conventional natural rubber, the company says.

Continental says the potential is great, but significant hurdles must be overcome before the use of this natural material can be fully utilized. For one, synchronizing the agronomy process (planting, growing and harvesting) to continually changing demand presents a significant challenge. Nevertheless, the team at Continental was recently able to extract several kilos of dandelion rubber from a small lab system to build the Taraxagum tires.

In conjunction with The Fraunhofer Institute for Molecular Biology and Applied Ecology, Julius Kuehn-Institute, and EKUSA, Continental has produced and tested tires where the tread is made 100% out of dandelion natural rubber as a polymer.
Between 10 and 30% of a car tire includes natural rubber, while truck tires can include proportionally higher amounts. Today, natural rubber is still obtained almost exclusively from the rubber tree (Hevea brasiliensis) which can only be cultivated in what is referred to as the “rubber belt” around the equator. Global demand for natural rubber is set to rise in the next few years and at the same time, the changing world makes it challenging to meet this demand.

The growth cycle of a rubber tree is roughly seven years before it can start producing latex that can be used in rubber production. This rubber made from this latex is key as it has unique performance attributes that can’t be replicated in synthetic rubber making natural rubber a must for tire production. Therefore, market demand is outpacing production capacities, a situation that, in the past, has led to unpredictable price volatility.

Continental is looking to a specific Russian dandelion species as an alternative for natural rubber production. The roots of this dandelion species contain the natural rubber latex (the source for natural rubber used in tires), meaning supply will be steadier and easier to control leading to greater price stability. The company says this crop is much less sensitive to weather than the rubber tree.

“In agricultural terms, dandelions are an undemanding plant, growing in moderate climates, even in the northern hemisphere, and can be cultivated on land not suitable for food production,” says Carla Recker, who heads the Continental team involved in the development of this material. “This means that rubber production is conceivable near our tire factories, for instance, and the significantly shorter transport routes would also reduce CO2 emissions.”
Transporting rubber from South America or West Africa to North America and Europe for manufacturing is a long and costly journey. If this part of the process can be consolidated to agricultural zones of the Americas and Europe, the economic and carbon emissions benefits would be a significant boon to the tire industry.

This particular dandelion can thrive in a large part of the world. The growth cycle for the Russian dandelion is approximately one year. The dandelions Continental are working with were optimized without the use of genetic engineering.

For more information about Continental’s dandelion research, visit http://www.taraxagum.com. For more information about the company, visit http://www.continentaltire.com.

Source MTD

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