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用在发动机、变速箱和驱动桥上的径向密封圈,应有足够柔软度才能封住流体,同时又要有足够的刚性以传递扭矩。针对这种综合要求,与回转轴相接触的外层,采用氨基甲酸乙酯,而内层采用坚固的聚丙烯酸脂制成的密封
Radial seals used on engines, gearboxes and transaxles should be soft enough to seal the fluid while still being rigid enough to transmit torque. In response to this general requirement, the outer layer in contact with the rotating shaft is made of urethane and the inner layer is made of a strong polyacrylate seal