Addressing Rolling Resistance and Durability of Tires

Reducing rolling resistance of tires remains a prime importance for the tire industry. With rising gasoline prices, awareness of the Kyoto protocol as a given, the Euro 5 norm demanding for decreasing CO₂ emission, the International Energy Agency focusing on tires to reduce fuel consumption and the California Energy Commission releasing legislation on tire efficiency, the challenge to tire engineers and compounders to address fuel efficiency, i.e. reduced rolling resistance of tires remains high on the agenda. Several approaches (varying polymers, fillers, etc) have been tried or explored but each approach has its own advantages and drawbacks in terms of balance between performance and cost.
Recently Teijin Aramid BV has introduced chemically activated aramid fiber granules (Sulfron^®) that reduce compound hysteresis significantly, which translates into better rolling resistance or fuel economy. This paper presents the results on our latest research in this area focussing on improvement in rolling resistance, heat build up, flex and dynamic properties. Compounds have been engineered to improve the hysteresis characteristics with a positive effect on wear and tear resistance. The effect of S-3001 will also be demonstrated in various tire tread with a focus on to reduce rolling resistance and heat generation in critical compounds. Tire test data are presented to demonstrate the improvement in rolling resistance, durability and wear characteristics.