With the experience of one-step spin-draw production of cationic modified FDY, the crux of process and quality control is solved, the commercial manufacturing is then possible.

• 在采用纺丝牵伸一步法生产阳离子可染涤纶FDY的实践中，解决了工艺及质量控制的技术难题，成功地进行了工业化生产。