Patent ID: 6634398
Filing Date: 2003-10-21
Classification: B29D,B60C,Y10T

Abstract:
A pneumatic tire (10) comprising at least a pair of parallel annular beads (12), carcass plies (14) wrapped around said beads (12), steel belts or breakers (16) comprising steel cords coated in high sulfur rubber disposed over said carcass plies (14) in a crown area of the tire (10), tread (18) disposed over said steel belts or breakers (16), and sidewalls (20) disposed between said tread (18) and said beads (12), the improvement wherein a reinforced rubber sheet (22) comprising low sulfur rubber (17) reinforced with round organic filaments or cords (11) is disposed over said steel belts or breakers (16), the steel cords in the steel belts or breakers (16) being inclined at angles of 12Â° to 35Â° with respect to the equatorial plane of the tire, and the organic filaments or cords (11) form an angle of 50Â° to 70Â° with respect to the equatorial plane of the tire, said organic filaments or cords (11) being at least 2000 denier (2200 dTex) and having a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 20 g/denier (177 cN/Tex), an elongation at break of at least 10% and a shrinkage of at most 10%.