Study of Yarn Snarling Part Ⅰ: Critical Parameters of Snarling

摘要

Snarling is a persistent problem in textile manufacturing processes such as warping, winding, knitting and weft insertion. In such processes, the tendency of yarn to snarl is considered to be a negative feature leading to the yarn breakage, reduced fabric quality and low production efficiency. On the other hand, the tendency of a yarn to snarl is employed to advantage in fancy yarn manufacture. This series of papers is devoted to the study of snarling both as an undesirable and a desirable feature of yarns. This paper deals with the critical parameters that cause snarling. An experimental study of yarn behaviour during twisting and snarling has been carried out. Theoretical snarling criteria are considered and applied to the prediction of the critical parameters of snarling. A good comparison between the theoretical behaviour of yarns and the experimental results is achieved when the non-linear behaviour of yarns during twisting is taken into account. Recommendations for avoiding snarling during yarn production and handling are given.