塑料是指以合成树脂为主要成分的一类有机高分子材料。由于它具有各种优异的物理、化学、机械与电气性能以及少或无切屑而十分简便的成型工艺,效率高,原料丰富,所以,不论国内国外,塑料工业都以极快的速度向前发展,塑料的应用也十分广泛,遍及各行各业。过去,认为塑料仅仅是金属或其它非金属材料的代用品,现在则由于其本身的独特性能,已成为现代工业不可缺少的一项工程材料。随着人们对 Plastic refers to a synthetic resin as a major component of a class of organic polymer materials. Because of its excellent physical, chemical, mechanical and electrical properties, as well as its minimal or no cutting and very simple molding process, it is highly efficient and has ample raw materials, so the plastics industry is moving fast at home and abroad , The application of plastic is also very extensive, in all walks of life. In the past, plastic was considered a mere substitute for metal or other non-metallic materials and now it has become an indispensable engineering material in modern industry because of its unique properties. With people right