Abstract
The aim of this work is to determine the effect of draft ratio and twist level on core visibility ratios of dual core-spun yarns. For this aim, different types dual-core yarns containing PET/Elastane were produced under controlled conditions. To objectively evaluate the visual quality of the dual-core yarns, the frequency of the core filaments appearing on the yarn surfaces was counted on dyed knitted fabrics produced with these yarns by using image processing algorithm. The results showed that the draft ratio and twist coefficient are the important factors influencing the core visibility ratios of dual core-spun yarns.
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