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Abstract
The production of compact yarn has shown progressive increase in the last ten years. The superior quality of the yarn produced particularly in strength and hairiness not only is reflected on the end product quality, but also on post spinning processes performance. The distinguished quality of these types of yarn gives it an increased share in the niche market.
Recently the trend extends to the use of twisted compact yarn for more even, stronger and less hairy yarns (for the equivalent count).This last trend needs to be thoroughly investigated to evaluate the effect of compacting single compact yarn even more through the production of twisted compact yarn.
In this research comparative study for the physical and mechanical properties of single yarns produced by different compact spinning systems was made. Also experimental analysis of physical and mechanical properties of single yarns produced by conventional ring spinning and compact spinning was made. Study of some factors affecting physical and mechanical properties of ply yarn produced by different compact spinning systems was made.
Finally study of some factors affecting physical and mechanical properties of ply conventional ring spun yarns and ply compact spun yarns is presented aiming to illustrate how plying and twisting process is reflected on plied compact yarn as compared to ring spun yarn.
The main conclusion was that:
In plying compact yarn to use it as warp threads (looking for maximum strength with a twist ratio of ply T.F. to single T.F. over 1.1) one can use cheapest machine, and produce almostly the same strength and hairiness. However if we are producing plied twisted compact yarn to be used as knitting, there is a difference of quality for different systems of compacting (twist ratio of ply T.F. to single T.F. below 1), system A gives the best quality.