一、行业背景1.橡胶可以分为天然橡胶和合成橡胶。合成橡胶中有少数品种的性能与天然橡胶相似,大多数与天然橡胶不同,但两者都是高弹性的高分子材料,一般均需经过硫化和加工之后,才具有实用性和使用价值。合成橡胶在20世纪初开始生产,从40年代起得到了迅速的发展。合成橡胶一般在性能上不如天然橡胶全面,但它具有高弹性、绝缘性、气密性、耐油、耐 First, the industry background 1. Rubber can be divided into natural rubber and synthetic rubber. The properties of a few varieties of synthetic rubber are similar to those of natural rubber, most of them are different from natural rubber. However, both of them are highly elastic polymer materials, which are generally only vulcanized and processed before they are practical and valuable. Synthetic rubber started production in the early 20th century and has been rapidly developed since the 1940s. Synthetic rubber generally not as good as the performance of natural rubber comprehensive, but it has high elasticity, insulation, air tightness, oil resistance, resistance