PNEUMATIC TIRE FOR HEAVY LOAD

摘要

PROBLEM TO BE SOLVED: To provide a pneumatic tire for a heavy load having a belt cushion for improving fuel economy and durability.

SOLUTION: The belt cushion 8 arranged between an end part in the tire axial direction of a belt layer 7 and a carcass 6, is constituted of an outer layer 81, an intermediate layer 82 and an inner layer 83 arranged in order toward the inside in the tire radial direction from the end in the tire axis direction of the belt layer 7. The outer layer 81 and the inner layer 83 are formed of a rubber composition B having a complex elastic modulus E*b and a loss tangent tanδb. The intermediate layer 82 is formed of a rubber composition C having a complex elastic modulus E*c in the substantially same as the complex elastic modulus E*b and a loss tangent tanδc smaller than the loss tangent tanδb.

COPYRIGHT: (C)2012,JPO&INPIT