Twist Redistribution of Folded Yarns in Woven Fabrics. Comparison of Single and Folded Yarn Fabrics.

In the present study, the concept of twist redistribution of folded yarns in a woven fabrics is introduced and the reasons for the twist redistribution of folded yarns have been given.Two pure cotton woven fabrics are compared. These two fabrics have similar industrial specifications, except that one is made of 100s/2 folded yarns, the other of single 50s yarns. Using the concept of twist redistribution of folded yarns in a woven fabric and variation of yarns in a woven fabric, this paper makes use of these two fabrics to explain why 100s/2 woven fabrics are becoming more and more popular or how the folded yarn fabrics are superior to the single yarn fabrics.Through comparing the measured geometrical and mechanical properties of these two fabrics, it is shown that, in addittion to their better appearance than 50s woven fabrics, 100s/2 fabrics have better quality in terms of mechanical properties and handle.It is believed that the twist redistribution takes place during the formation of woven fabric made of folded yarns. However, it may be more realistic to see the redistribution as a tendency rather than an exact relationship between fabric sett and yarn twist.