| 摘要 |
PURPOSE:To improve the durability of a tire in an extensive application area ranging from a normal area to a high temperature and humid area by forming an inner liner layer to be set up at the inside of a carcass layer into a three- layer structure, and specifying a rubber composition forming each layer. CONSTITUTION:A carcass layer 4 is set up between a symmetrical pair of bead wires 3, and in the inner part of this carcass layer 4, there is provided with an inner liner layer 5. In this case, this inner liner layer 5 is formed from a three layers consisting of an inner layer 5a at the side of the carcass layer 4, an outer layer 5c facing to tire charged air and an intermediate layer 5b to be set up between these layers. And, the outer layer 5a is formed from independent halogenated butyl rubber or its combined natural rubber. And, the intermediate layer 5b is made up of mixing 5-30 wt. of a p-phenylenediamine antioxidant in 100 wt. stock rubber containing less than 20 wt. of natural rubber and/or diene rubber.
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