A self-inflating tire having a sidewall (24), a chafer, a groove (14) positioned within the sidewall (24) or the chafer, an air tube (16) positioned within the groove (14) in contacting engagement with opposite groove surfaces (28) at least partially surrounding the air tube (16), and a coverstrip (18) overlaying the groove (14) is disclosed. The coverstrip (18) comprises a rubber composition comprising from 50 to 80 phr of a polybutadiene, from 20 to 50 phr of natural rubber and from 0.1 to 5 parts by weight, per 100 parts by weight of rubber (phr), of a vulcanization modifier.
本发明公开了一种自充气轮胎,该轮胎具有侧壁 (24)、挡圈、位于侧壁 (24) 或挡圈内的凹槽 (14)、位于凹槽 (14) 内与至少部分环绕气管 (16) 的相对凹槽表面 (28) 接触啮合的气管 (16) 以及覆盖凹槽 (14) 的盖带 (18)。覆盖条(18)由橡胶组合物组成,其中包括 50 至 80 phr 的聚
丁二烯、20 至 50 phr 的
天然橡胶以及每 100 份重量的橡胶(phr)中 0.1 至 5 份重量的
硫化改性剂。