Indian Journal of Fibre & Textile Research
Vol. 31, September 2006, pp. 381-386

 

Fibre migration in compact-spun yarns: Part IPneumatic compact yarn 

S Ganesan & G Ramakrishnan

Received 27 January 2005; revised received and accepted 29 September 2005

Fibre migration of regular ring-spun vis--vis compact-spun (pneumatic compact) combed cotton yarns has been studied using the tracer fibre technique for the different migration parameters. The yarn counts used were 40s and 52s Ne (14.8 tex and 11.4 tex). It is observed that the migration parameters for compact yarn are 10-25% lower than those of regular yarn in both 40s and 52s Ne counts. The degree of migration is found to be lower in compact-spun yarn than in ring-spun yarn due to the reduction in size of spinning triangle and its consequence in the tension gradient. Even though this causes significant change in degree of migration, its contribution is less in comparison to the tension gradient due to fibre occupying different radial positions. The diameter of compact yarn is found to be lower than that of regular yarn in both the cases and this indicates that the packing densities are different. Higher packing density coupled with better integration of fibres into the yarn body results in higher yarn strength.

Keywords: Cotton, Compact-spun yarn, Fibre migration, Mean fibre position, Mean migration intensity, R M S deviation, Tension mechanism

IPC Code: Int. Cl.8 D01F6/00, D02G3/00