| 摘要 |
The carcass (10) is made partly of one rubber compound and between the tread and the tire air chamber (18) there is a buffer layer (22) made from a second compound. At 60 degrees C the second compound has reduced damping characteristics compared to the first compound. The carcass (10) is made partly of one rubber compound and between the tread and the tire air chamber (18) there is a buffer layer (22) made from a second compound. At 60 degrees C the second compound has reduced damping characteristics compared to the first compound. The second rubber compound has a resilience not less than 25%, preferably 75-85%, higher than the first compound, in particular at 20-60 degrees C. Loss factor in the second compound is reduced a not less than 50% compared to the first compound, particularly at 60 degrees C. Typical loss factor at 60 degrees C is 0.017-0.021. Other properties of the second compound include a density less than that of water and preferably 0.98-0.9950 kg/dm3; Shore A hardness of 35-45 and tear strength of 18-22Mpa. Buffer layer thickness is 4-6mm. A typical construction of the tire comprises the outer tread layer (12) of the first compound, a buffer layer (22) of the second compound and a third layer (13) of the first compound incorporating one or more reinforcing fabric layers (21). |
