| 摘要 |
PURPOSE:To prevent ozone cracks generated on a tread surface by providing a thin layer including ethylene propylene diene rubber and butyl rubber halide on at least groove portions in the tread surface of a tyre. CONSTITUTION:A thin layer formed with rubber composition including ethylene propylene diene rubber and butyl rubber halide as rubber components is provided on at least groove portions in the tread surface of a tyre. With this arrangement, cracks generated on the tread surface can be prevented by the thin layer formed with ozone-proof rubber. Moreover, the thin layer has high adhesive property with respect to the tread surface, and thereby it functions effectively without peeling for a long time. |
