Silica for “green” truck and bus tyres
Evonik Hall 19 Stand C240
In passenger cars, “green” tyres have already proven to be effective in conserving resources. Evonik has now developed the silica Ultrasil 9100 GR that, according to the company's latest findings, is particularly suitable for use in truck and bus (TBR) tyres. In contrast to passenger car tyres, these use mainly natural rubber, which, in combination with the silane, places special requirements on the silica.
Evonik said that with its silica/silane technology, fuel savings could be as high as 8 %. This represents an important cost factor and a significant contribution to environmental conservation, particularly in buses and trucks with high mileage, said the company.
“So silica/silane technology, especially when used in 'green' tyres for buses and trucks with high fuel consumption levels, is making an important contribution to climate protection,” said Dr. Jens Kiesewetter, head of Technical Service for Rubber Silica, “and that in anticipation of the recently concluded EU agreement on targets for CO2 reduction for trucks.” The braking distance is also reduced, leading to greater driving safety on wet or snow-covered roads, said Evonik.
As a result of the long distances covered and of variations in infrastructure, the treads, especially of truck and bus tyres, are subjected to particularly heavy load. Thanks to silica/silane technology Ultrasil 9100 GR, despite its high specific surface area, is easily incorporated into and dispersed in the natural rubber compound, and contributes to improved abrasion resistance. This in turn allows better mileage performance, said the manufacturer.
“Feedback from the market tells us that demand for 'green' tyres continues to be very high, thanks to their advantages. Their use in buses and trucks particularly is still quite new and is attracting great interest,” explained Dr. Bernhard Schäfer, head of Rubber Silica.
Evonik is a global manufacturer of silica. In addition to the fumed silica Aerosil and the precipitated silica Ultrasil, Sipernat, Zeodent and Spherilex, the company also produces matting agents made from silica under the brand name Acematt and other fumed metal oxides under the brand name Aeroxide. Overall, the company has global production capacities of approximately 1 million t/y for all silica products.