Reconciling Multi Tube Dye Liquor Ratios across Mixed Capacity Jets
Reconciling liquor ratios across mixed-capacity jets demands adjusting total liquid for static piping dead volume to maintain absolute chemical concentrations.
Rope Loop Turnover Frequency
Mechanical Frequency
Number of times a continuous circuit of fabric passes through the nozzle and transport system of a jet dyeing machine within a specific period. This rope loop turnover frequency determines the contact time between the fabric and the treatment liquor as well as the mechanical stress applied to the material. It is a necessary factor in ensuring even chemical application and temperature distribution throughout the entire length of the rope.
Uniformity Metric
High speeds increase the chances for the dye to distribute evenly because the fabric visits the high concentration nozzle area more often.
Fabric Protection
Excessive speed can cause surface abrasion or pilling on delicate knit fabrics while slow speeds may lead to permanent creasing or tangles. The setting for the rope loop turnover frequency must be balanced against the weight and construction of the textile to prevent damage. Monitoring the winch speed and pump pressure ensures that the fabric moves smoothly without stretching or snagging.
Process Calculation
Calculation of the required cycle time involves dividing the total length of the fabric rope by the speed of the machine drive. A typical rope loop turnover frequency for cotton knits might be one cycle every ninety seconds. This timing ensures that the chemistry has enough opportunity to penetrate the fibre during each pass through the nozzle.