| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire which suppresses rolling resistance in low, prevents the occurrence of static electricity during tire running, and furthermore improves crack resistance. SOLUTION: The pneumatic tire includes: an inner conductive layer 14 arranged between a carcass 10 and a side wall rubber 8; conductive rubbers 4, which contact with the inner conductive layer 14 and are arranged at the lower area of both ends of breakers 9; a covering rubber 5, which has contact areas with the conductive rubbers 4 and is arranged so as to cover the upper side of the breakers 9; conductive rubbers 6, which contact with the covering rubber 5 and are embedded in a tread part so that a part of them is exposed on the surface of the tread; and bead part rubbers, which contact with the inner conductive layer 14 and are arranged in areas that contact with the rim flanges of the bead parts. The inner conductive layer 14 is manufactured using rubber compositions for the inner conductive layer containing 10-50 pts.mass of carbon black and 10-50 pts.mass of silica based on 100 pts.mass of rubber components containing 30-90 mass% of natural rubber and 70-10 mass% of epoxidized natural rubber. COPYRIGHT: (C)2011,JPO&INPIT |
