Abstract:

In order to solve the problem that the feeding location of three colored roving in different combinations bave different color effects while spinning melange yarn using three-channel ring digital spinning technology, a new method was proposed to measure the color proportion of each component fiber on the surface of melange yarn. By using white roving as tracing object and black roving as background object, a digital microscope was used for continuously sampling images of melange. Then, these images were analyzed by MATLAB, and the area proportion of the tracer fiber in each image was figured out. The area proportion of each component color fiber fed by the corresponding location was acquired. Three rovings of two black and one white were adopted to spin pure polyester yarn of Z twist and melange yarn of S twist at the same proportion by changing the feeding location of white roving. The color proportion of different feeding locations were acquired by the image process. The results show that those yarn with Z twist are 36.84% and 32.21%, reapectively, and those with S twist are 32.09%, 31.00% and 36.91%, respectively.

Key words: rung digital spinning, melange yarn, feeding location, color proportion