聚合物材料比已知的其他材料具有良好的多种技术性能。近年来许多国家铁路已在很多方面采用这种新材料,其中塑料、合成橡胶发挥了较重要的作用。聚合物材料的特点是:1.多种多样功能,可供充分应用。2.有适当的强度和抵抗持续动、静应力的性能。3.极好的绝缘性能。4.抗腐蚀性能。5.容易修理,可节约人工。6.聚合物构件的养护维修人工费用少。此外,有些聚合物材料可能在某些方面的技术性能较差,因此,在结构设计中,必须根 Polymeric materials have a variety of good technical properties over other known materials. In recent years, many national railways have adopted this new material in many aspects, of which plastic and synthetic rubber have played a more important role. The characteristics of polymer materials are: 1. A variety of functions for full use. 2. With appropriate strength and resistance to continuous dynamic and static stress performance. 3 excellent insulation properties. 4. Corrosion resistance. 5. Easy to repair, can save labor. 6. Maintenance of polymer components labor costs less labor. In addition, some polymer materials may have poor technical performance in some aspects, and therefore, in structural design,