Characterization of the Twist Distribution Function and Twist Unevenness of Self-twist Yarns
Journal Title: Fibres and Textiles in Eastern Europe - Year 2016, Vol 24, Issue 1
Abstract
In in-phase self-twist yarn there exists an obviously weak twist area between the twisted and no twisted zones. Therefore, during the self-twist spinning process, different distances from the two strands to the convergence point is adopted to produce a certain phase difference to improve the yarn strength. There are two methods used for calculating the twist distribution function of self-twist yarn: 1. using the difference in distance c, and 2. using the twist distribution function of strands A and B, respectively. Then the average twist over a half cycle length is calculated by the twist distribution functions from the two methods mentioned above. Comparing the calculation value from the two methods with actual test twists for the half cycle length, the result shows that the calculation value from method 2 is closer to the values measured, namely the twist distribution function derived from that of strands A and B, respectively. The twist unevenness of self-twist yarn is calculated by the twist distribution function from method 2. The twist unevenness of yarn 1 is the highest. That of yarns 2 and 3 decreases in turn. From the test data of 49×2 tex and 113×2 tex selftwist yarns, in-phase self-twist yarn 1, with maximum twist unevenness, has the minimum tenacity and maximum unevenness of tenacity, and in the same way phased self-twist yarn 3, with the minimum twist unevenness, has the maximum tenacity and minimum unevenness of tenacity.
Authors and Affiliations
Hong Cui , Chunxia Wang , Libin Lv
Keywords
Related Articles
- EP ID EP163970
- DOI 10.5604/12303666.1172085
- Views 79
- Downloads 0
Using a 3D Body Scanner in Designing Compression Products Supporting External Treatment
The work comprises a statistical tolerance analysis of human body dimensions using a 3D body scanner and its impact on the value of unit pressure exerted by a compression product on the subject’s body. Model calculations...
Formation and Antibacterial Property Analysis of Electrospun PVA Nonwoven Material with a Small Amount of Silver Nanoparticles
Electrospinning is a process which produces nonwoven material from nano/microfibres. The aim of this study was to electrospin poly(vinyl alcohol) nano/microfibres material with small amount of silver nanoparticles (Ag-NP...
Komfort i właściwości użytkowe laminowanych i zmechaconych tkanin dżinsowych
Badano właściwości użytkowe tkanin dżinsowych laminowanych i zmechaconych w odniesieniu do próbek takich tkanin powstałych metodą standardową. Badano grubość tkanin, przepuszczalność powietrza, przepuszczalność pary wodn...
Optimisation of Selected Components of a Roller Carding Machine in the Aspect of Improving their Cooperation Quality
The quality of web produced by a carding machine is largely influenced by the shape and height of the gaps between card clothings of workers and the doffer cooperating with the main cylinder as well as between the doffe...
Relation between Extension and Bursting Strength Properties of the Denim Viewed Knitted Fabrics Produced by Cellulosic Fibers
Denim viewed knitted fabrics are softer, cheaper, and more elastic than woven denim fabrics. Clothes which are produced by these fabrics adapt the body movement easily because of their flexible structure. Since these fab...