| Abstrakt: |
The fiber migration in the newly developed rotor-jet spun yarn is investigated utilizing the tracer fiber technique and a proposed image analysis method. Effects of rotor-jet spinning parameters including three air-jet nozzle types of 90Z, 60Z, and 30Z (the values of 30, 60, and 90 are jet orifice angles and Z is air rotational direction identical to rotor rotational direction) at different air pressure values of 0.2, 0.5, 0.8, and 1 bar were considered. The results showed that increasing of air pressure causes the fiber to locate in the interior position of the yarn for 90Z nozzle, while for 30Z and 60Z nozzle types, the fiber is moved toward the exterior position of the yarn. Conversely, it was indicated that with increase of air pressure mean migration intensity and migration frequency increase for 90z nozzle, whereas decrease for 30Z and 60Z nozzle types. In general, the mean migration intensity and migration frequency magnitudes of rotorjet spun yarn with 90z nozzle type are significantly higher than those of normal rotor yarn particularly at the higher air pressure. However, rotor-jet spun yarns with 30Z and 60Z nozzle types exhibited much lower mean migration intensity and migration frequency magnitudes than normal rotor yarn. [ABSTRACT FROM AUTHOR] |
