TIRE VULCANIZING BLADDER

PROBLEM TO BE SOLVED: To provide a tire vulcanizing bladder 2 improved in durability. SOLUTION: The tire vulcanizing bladder 2 is equipped with a main body 4 expanded by the filling with a fluid, the upper mold grip 6 extending almost inwardly in a radial direction from the upper end P1 of the main body 4, the lower mold grip 8 extending almost inwardly in a radial direction from the lower end P2 of the main body 4, the upper clamp 10 further extending almost inwardly in a radial direction from the upper mold grip 6 and the lower clamp 12 further extending in almost inwardly in a radial direction from the lower mold grip 8. The main body 4 comprises a crosslinked rubber and is equipped with a first rubber region 14 comprising a high modulus rubber 18 and the second rubber region 16 positioned under the first rubber region 14 and comprising a low modulus rubber 20. The first and second rubber regions 14 and 16 are arranged so as to be adjacent to each other in an axial direction. COPYRIGHT: (C)2007,JPO&INPIT