A run-flat tire according to the present invention includes a tread portion, a sidewall portion, a bead portion, a sidewall reinforcing rubber, and a carcass. A lining is arranged on the inner surface of the tire. The inner layer rubber is disposed between the sidewall reinforcing rubber and the inner liner. In accordance with JIS K6270, when a test piece obtained by cutting a center portion of a dumbbell-shaped 8 # test piece by 1 mm perpendicular to a repeated stretching direction of the test piece is used and repeated stretching at a frequency of 10 Hz is applied under a condition of 150 DEG C, the inner layer rubber has a tensile strain within a range of 10%-30%. The number of repetitions until the test piece is destroyed is more than two times of the number of repetitions in the case of the sidewall reinforcing rubber. The ratio t2/t1 in a reference state is 0.05 to 0.30.
根据本发明的缺气保用轮胎包括胎面部、侧壁部、胎圈部、胎侧增强橡胶和胎体。轮胎内表面设置有内衬。内层橡胶配置在胎侧增强橡胶和内衬之间。对于内层橡胶,根据JIS K6270,当使用通过垂直于试验片的重复拉伸方向对哑铃状8号试验片的中心部切出1mm而获得的试验片并且在150℃的条件下被施加频率为10Hz的重复拉伸时,在施加的拉伸应变为10%‑30%的范围内,直至试验片破坏的重复次数是胎侧增强橡胶的情况下的两倍以上。在基准状态下比率t2/t1为0.05至0.30。
Run-flat tire
缺气保用轮胎
2023-11-17
Patent
Elektronische Ressource
Chinesisch
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |