Abstract: Air-jet vortex spinning is a new method developed on the basis of air-jet spinning. It twists the fiber bundle into yarn via the high-speed vortex generated inside the nozzles of the machine. Due to its highspeed, high-yield, and high-quality output, it is quickly recognized by the textile industry. And the new regenerated cellulose fiber represented by EcoCosy^® BV fiber has become one of the best raw materials for air-jet vortex spinning for its excellent spinnability. The paper carried out continuous research on the application of EcoCosy^® BV fiber in air-jet vortex spinning, and chose the appropriate parameters of highcount spinning by orthogonal test. The result indicated that when the run-in ratio is 0.98, the draft ratio is 1.0, and the nozzle pressure is 0.55 MPa, it is the preferred solution that can achieve good results in actual production.

Key words: EcoCosy^® BV fiber; air-jet vortex spinning; process parameters; orthogonal test