The formula consists of NR/ BR blend, high temperature-stable insoluble sulfur and delayed action accelerator, new technology carbon black with low structure, Gum-easy T-78 and plasticizer. 生胶选用NR/BR并用,硫化体系选用后效性促进剂和高温稳定的不溶性硫黄,补强体系选用低结构新工艺炭黑,并添加胶易素T78和增塑剂。