Abstract:

In order to solve the problem of dyeing color difference due to seam allowance during cold pad batch dyeing, focused on knitted fabric, the paper analyzed the reasons for the formation of seam allowance imprint, used the theory of thick wall tube and iteration law to analyze the force of knitted fabric in the process of winding, and established a mathematical model for the winding of knitting fabric. The paper analyzed the values of residual tension and radial pressure under constant winding tension and taper winding tension, and established the model under power function winding tension taking the control of seam allowance imprint as the goal and accounting for the roll shape of knitted fabric. It is concluded that the radial pressure under power function winding is much smaller than the constant tension and taper winding, and the smlller exponent of the power function, the more uniform distribution of the residual tension, the smaller radial pressure, which is conductive to the control of seam allowance imprint to obtain high quality dyed fabric, providing the reference in the design of winding tension for cold pad batch dyeing of knitted fabric.

Key words: seam allowance imprint, winding tension, cold pad batch dyeing, knitted fabric