对汽车安全性、舒适性、速度以及环保方面的要求不断提高,推动了汽车的改进,也决定了作为汽车组成部分的轮胎的发展方向。轮胎质量的主要特征之一是气密性,一般由两个参数决定:一是压力的降低(ПДШ),按美国标准ASTM,是由轮胎在无负荷、静态和恒温条件下经30秒后的内压下降值 Increasing demands on the safety, comfort, speed and environmental aspects of automobiles have driven improvements in automobiles and have also determined the direction of development of tires as part of the automobile. Tire quality is one of the main features of air tightness, generally determined by two parameters: First, reduce the pressure (ПДШ), according to the United States standard ASTM, is the tire under no load, static and constant temperature conditions after 30 seconds Pressure drop value