The effect of traveller weight on twisting rate, strength, hairiness, neps and thinness and thickness points of polyester and cotton blend yarns

In ring spinning, the traveller has an important role in yarn properties. After the draft in fibers tape, traveller twist to yarn coordinated by spindle rotation that caused the yarn wind around the bobbin. Therefore, if the weight of traveller was suitable, it will increase the production speed ring and the desired yarn quality. The purpose of this research, is the effects of traveler weight on physical and mechanical properties of polyester/cotton yarns. Also, the estimation of the suitable traveller score to obtain the desired physical and mechanical properties in the rim threads is one of the other goals of the research. Therefore, some examples of the traveller score were considered for polyester/cotton mixed ring yarn. According to the ASTM standard test instructions, repeated tests were performed to reduce the error rate of the tests. Data analysis was done using SPSS statistical software (27) and all comparisons were tested by ANOVA and then Duncan test at 95% confidence level. The results showed that by the increase in traveler weight, the yarn twist, strength and the frequency of thick places in the yarns increase, and the hairiness and thin places in the yarn are decrease. Other results showed, if increase in weight of traveller, the hairiness and thin rate spots in polyester/cotton yarns decreases.