1. Fabric characteristics
The fabric weight directly affects the selection of the nozzle gap; the higher the weight, the larger the gap needs to be. Fabric twist also affects the uniformity of dyeing.
2. Equipment Parameters
Nozzle Gap: Adjustable according to fabric weight; larger weight requires larger gaps.
Guide Roller Type: Active type reduces abrasion; passive type is less expensive.
Pressure Regulation: Affects dye penetration; typically 0-0.8 MPa.
3. Process Conditions
Temperature Control: Accuracy up to ±0.1℃, affects dyeing rate.
Heating Rate: Generally 1-5℃/min; slower rate promotes uniform dyeing.
Liquor Ratio: Fabric weight to dye liquor volume ratio; commonly 1:5-1:20.
pH Value: Affects dye ionization; control range 2-12.
4. Dye Liquor Characteristics
Chloride Ion Concentration: High concentration accelerates equipment corrosion.
Flow Rate Stability: Deviation should not exceed ±1% to ensure uniform dyeing.
5. Operation Management
Operational Standardization: Affects first-pass dyeing success rate.
Equipment Maintenance: Regularly inspect key components such as nozzles and filters.
