| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic radial tire having superior durability compared with the conventional one by effectively suppressing progress of breakage from the end part of the belt in a belt layer formed by a treating material using organic fiber cord and the treating material using a steel cord. SOLUTION: The pneumatic radial tire is reinforced by carcass layer 1 which has a bead part 11, a side wall part 12, and a crown part 13, and troidally extends between bead pars, and a belt layer 2 made of two or more treating materials disposed at the outer periphery of the crown part. At least one piece 2A of the treating materials composing the belt layer is made of rubber-coated fabric where organic fiber cord or carbon fiber cord is arranged in parallel, the treating material 2B other than that is made of rubber-coated fabric of the steel cord, and the twisting direction of the belt cord arranged in parallel in the treating material is different by every strand of cord. COPYRIGHT: (C)2008,JPO&INPIT
|
