Cotton Ply Twist Multipliers in Continuous Reactive Dyeing
Yarn ply twist multiplier controls intra-bundle pore radius; multipliers above 4.0 cause surface ring-dyeing frosting while values under 3.2 provoke migration.
Liquor Wet Pickup
Percentage Calculation
Measure of the amount of chemical solution absorbed by a dry textile after passing through a padding trough and squeeze rollers. Controlling liquor wet pickup ensures that the correct weight of functional ingredients like flame retardants or softeners reaches the fabric. The value is expressed as a ratio of the weight of the liquid retained to the original dry weight of the goods.
Absorption Variable
Speed of the machine and the pressure of the nip rollers determine the final level of liquor wet pickup achieved. Higher roller pressures force more liquid out of the fibers to result in a lower pickup percentage. Adjusting these mechanical inputs allows for the management of the chemical concentration deposited onto the yarn.
Surface Tension
Fiber type influences how much liquor wet pickup is possible during short immersion times. Porous cotton fibers take up more solution than tightly packed synthetic filaments. Wetting agents added to the bath help lower tension to ensure the fabric wets out rapidly and thoroughly.
Target Accuracy
Maintaining a consistent pickup rate remains necessary for shade continuity and finish performance. Regular checks at the stenter exit confirm that target levels stay within range. Quality depends on pickup.