| 摘要 |
PROBLEM TO BE SOLVED: To provide a run flat tire having a run-flat durability performance.SOLUTION: A run flat tire having a side-reinforcing rubber layer is provided. A carcass ply is made of a rubberized layer of a polyester cord formed by polyester filaments twisted together and then adhesion-processed by an adhesive composition. A polyester filament is a fiber made of polyester containing ethylene terephthalate as a main repeating unit and having intrinsic viscosity of not less than 0.85, and formed of a polyester fiber in which a terminal carboxy group amount in the fiber is not less than 20 equivalent/ton, a long period by small-angle X-ray diffraction is 9 to 12 nm, and a surface treatment agent having an epoxy group adheres to the surface of the fiber. The adhesive composition contains resorcin, formaldehyde, rubber latex, an emulsion polymerized blocked isocyanate compound, and ammonia. The content of the emulsion polymerized blocked isocyanate compound is 15 to 45 mass%. |
