随着为新型小汽车设计的小型高效率发动机的应用,扩大了高性能特种橡胶的用途。目前,发动机后曲轴密封采用氟弹性体就是其中的一例。七十年代,它们已首先在欧洲用于小型高速旋转的发动机。这些密封件经不断改进,现被公认为欧洲标准。在美国,氟弹性体后曲轴密封件已用于最新设计的发动机,目前,正在考虑用于老式美国车辆的后轴密封,以取代芯绳填料、丁腈橡胶、聚丙烯酸酯橡胶及硅橡胶。人们发现,横置发 With the use of small high-efficiency engines designed for new cars, the use of high-performance specialty rubber has been expanded. At present, the engine crankshaft seal with fluoroelastomer is one example. In the seventies, they were first used in Europe for small high-speed rotating engines. These seals have been continuously improved and are now recognized as European standards. In the United States, fluoroelastomer rear crankshaft seals have been used on newly engineered engines and are currently being considered for rear axle seals in older American vehicles to replace core filler, nitrile rubber, polyacrylate rubber and silicone rubber. People found that horizontal hair