Composite yarns were spun using profiled polyester fibers and nature cotton fibers at different blend ratios. The water absorption capacity, diffusion rate, and drying rate of knitted fabrics made from the three composite yarns were examined to shed light on their moisture absorption and release performance. Experimental results reveal that the diffusion rate and drying rate become better with decreasing cotton content. However, knitted fabrics made of profiled polyester alone showed the worst water absorption ability, which can be improved with the addition of cotton fiber. For core and cover yarns, the addition of profiled polyester filaments can enhance their performance in moisture absorption and release. In summary, textiles products made from core and cover yarns of Tf/Ts/C 42/46/12 and 42/35/23 can not only provide a better sense of touch but also comfort when worn with efficient moisture absorption and release.

In this study, experiments were conducted to examine the drafting behavior of non-circular fiber (cross-shaped profiled polyester) to obtain the optimum drafting conditions for spinning polyester/cotton (P/C) blended yarn. The drafting force in the break draft zone was measured and the effects of roller gage, draft ratio and P/C blend ratio on the drafting force were examined. The 20Tex spun yarn was spun with different P/C blend ratios and its quality was evaluated to shed light on the relationship between drafting force and yarn evenness. Experimental results showed that the optimum drafting conditions involved using a roller gage of 62 mm and spinning at a draft ratio of 1.20. In addition, blend yarn of P80/C20 ratio had the best yarn quality.