| 摘要 |
PURPOSE: Provided is an apex rubber composition of a bias tire for a truck and a bus, which has improved aging property and low heat generation and can produce a tire excellent in endurance and improves reclaiming performance. CONSTITUTION: The apex rubber composition contains 100pts.wt. of a raw rubber comprising a natural rubber and a SBR rubber in the ratio of 9:1, 35pts.wt. of a carbon black FEF(N550), and 40-50pts.wt. of a carbon black GPF(N660), wherein the carbon black GPF(N660) is used instead of a carbon black SRF(N774) and has an iodine absorption value of 36mg/g and a DBP absorption value of 90ml/100g. |
