Wetfast FL63 levelling agent for the continuous pad dyeing of polyamide narrow fabric with acid dyes.
Narrow ribbon dyeing process
1 Polyester
Polyester fiber characteristics (dense) - hot melt dyeing, high temperature high pressure dyeing - selection of dyes - disperse dyes - temperature - (hot melt dyeing) 190C - (high-temperature and high-pressure dyeing) to 130C.
Into the band - before washing - drying - color slot - pre-baking (infrared) - high-temperature baking - after washing (restore washing) - after drying - drop with.
Infrared pre-baking the role:
The dye molecules are initially attached to the fibers, to prevent problems such as flower color appears.
The role of high-temperature baking:
The dye molecules gain full access to the interior of the fiber, through the process of dye uptake fiber.
Restore cleaning role:
Excess dye molecules to decompose to ensure product for color fastness.
2. Nylon (protein products)
Nylon fiber characteristics (having a reactive functional group) - steaming process - the chosen dye - (weak) Acid Dyes - Temperature - 100 degrees Celsius.
Into the band - padding – steaming - after washing - drying – narrow fabric collector
Steaming effect:
Acidic dye molecules reacted fully with the corresponding functional group in the fiber, to complete the process of dyeing fibers in the acidic dye.
After Washing role:
Removal of unfixecd dyes to ensure that the product color fastness.
