随着机一电一体化的发展,已大量利用塑料来制造各种机械的构件。可认为这是由于对塑料本身的开发研究,利用金属没有的特点,即重量轻而强韧、耐磨损、不生锈、不需注油、免去维修等特性。用于机械构件的所有塑料,可统称为工程塑料。作为在工业方面用的塑料,着重是提高它的机械特性、耐热性、抗老化性等,其品种迄今已有30～40种之多。此外,工程塑料在它的性能上,优点很 With the development of electromechanical integration, a large amount of plastic has been used to manufacture various mechanical components. This can be considered because of the development of plastic itself, the use of the characteristics of the metal is not light weight and tough, wear-resistant, no rust, no oil, remove the maintenance and other characteristics. All plastic used for mechanical components, may be collectively referred to as engineering plastics. As a plastic for industrial use, its emphasis is to improve its mechanical properties, heat resistance, anti-aging properties, the species so far, as many as 30 to 40 species. In addition, engineering plastics in its performance, the advantages are