| 摘要 |
PURPOSE: A shaping bladder rubber composition for a tire shaper is provided, to improve the fatigue resistance by employing the carbon black having specific characteristics as a reinforcement, thereby enhancing the lifetime. CONSTITUTION: The shaping bladder rubber composition comprises a rubber mixture comprising a natural rubber and a butadiene rubber; and 25-35 parts by weight of the carbon black with an iodine adsorption value of 32-40 g/mg and a DBP oil adsorption value of 87-95 ml/100 g. Preferably the ratio of the natural rubber to the butadiene rubber in the rubber mixture is 80:20 to 90:10 by weight. Optionally the composition comprises further common additives for a rubber composition.
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