Dyeing Vessel
Impregnation chambers designed for continuous fabric dyeing hold a minimal volume of liquid to ensure rapid liquor turnover. A continuous pad trough receives dry fabric under tension and applies dye solution uniformly before the squeezing rollers. The design minimizes the dwell time of the fabric in the bath to prevent selective absorption.
It ensures that the incoming fabric meets freshly replenished dye liquor.
Volumetric Design
Low-capacity reservoirs are necessary to prevent the accumulation of depleted dye liquor during long production runs. The continuous pad trough utilizes displacement blocks to reduce the active volume while maintaining the required immersion path. This physical configuration ensures that the liquor volume is replaced multiple times per hour.
Consequently, the concentration of the chemical bath remains stable.
Liquor Exchange
Dynamic replenishment systems supply fresh dye and auxiliary chemicals at the same rate that the fabric carries them away. In a continuous pad trough, the liquid level is monitored by sensors to trigger immediate dosing. Fresh dye liquor enters through a perforated pipe at the bottom to promote rapid mixing and uniform concentration.
This prevents the formation of dead zones where dye could settle or cool.
Operating Limit
Extremely high run speeds can cause turbulence that disrupts the uniform application of the liquid. Mechanical foam generation also limits the effective speed of the textile web.
