Production Practice of CJ 5.8 tex Single Yarn and Its Ply Georgette Yarn
In order to ensure the stiffness and elasticity of pure cotton CJ 5.8 tex ply georgette yarn,the requirements of pure cotton georgette fabric on yarn are analyzed,and the process of cotton blending and spinning of pure cotton CJ 5.8 tex ply georgette yarn,the selection of twist and twist direction of single yarn and ply yarn,the optimization of single yarn quality and spin-dle speed,the process of double twisting and the points for attention,and the importance of yarn steaming process are introduced.The pure cotton CJ 5.8 tex ply georgette yarn is spun by multi-group experiment scheme,the single yarn are determined to be with Z twist of 28.50 twist/(25.4 mm),and the ply yarn are determined to be with Z twist of 24.70 twist/(25.4 mm).After the process optimization,the spinning spacer is 3.00 mm,the pressure bar is e-quipped in the front and rear zones,the roving quantity is 2.9 g/(10 m),the spindle speed is 15.0 kr/min,and the winding angle of the double twisting process is 14°32′.It is pointed out that the ply force regression equation can be determined by Excel data analysis for the twist de-sign of ply yarn production.The product of the georgette single yarn Z twist+Z twist ply under lower twist has the same strength as single yarn Z twist+S twist ply with a higher twist,and it saves electricity and has high production efficiency of single yarn.The defects such as small bra-ided and single strand should be controlled in the process of combining ply drawing.In the double twisting process,the key points should be focused on adjusting forming,avoiding strong twist and uneven twist problems.Yarn steaming and forming can make georgette yarn structure stable,strength and elongation increase,which is conducive to weaving and printing.
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