苏联“第三代”化学纤维的开发始于50年代末60年代初,先后开发了高强高模量纤维,在高温下和暴露于火焰中仍有良好稳定性的有机纤维,具有一定电化学性质的纤维,有选择分配液体或气体介质为单一成分的空心纤维,具有离子交换能力和生物活性官能团的纤维,等等.70年代初以来在芳纶纤维及带有杂环 The development of the “third generation” chemical fiber in the Soviet Union started in the late 1950s and early 1960s and successively developed high-strength and high-modulus fibers, organic fibers with good stability under high temperature and exposure to flame, and having certain electrochemical properties , Hollow fibers with selective distribution of liquid or gaseous media as a single component, fibers with ion exchange capacity and bioactive functional groups, etc. Since the early 1970s aramid fibers and heterocyclic rings with heterocycles