Performance test of leveling agent for disperse dyes 1------retarding property

The slow dyeing property of the leveling agent can inhibit the instant dyeing property at the initial stage of dyeing, which is the primary factor in choosing a leveling agent. The test method of retardation is generally as follows:

1. Experimental materials:

Sample: Polyester fabric after deoiling and refining

formula:

C.I. Disperse Orange 30# 0.5% (O.M.F)

C.I. Disperse Red 60# 0.5% (O.M.F)

C.I. Disperse Blue 79# 0.5% (O.M.F)

Leveling agent x g/L

pH: 4.5

Bath ratio: 1:20

2. Experimental process:

Dope dyeing: Dyeing at 40°C, heating up to 130°C for 30 minutes and dyeing for 45 minutes, sampling six times at 90°C, 100°C, 110°C, 120°C, 130°C, 130°C×45min, half of the cloth samples taken out were reduced and cleaned (Sulfur powder 2g/L, NaOH 2g/L, 80℃×20min), the other half was rinsed with tap water for about 30s, then dehydrated and dried.

Residue dyeing: after each sampling, measure 40mL dyeing residue, add 2g of polyester cloth for dyeing, the process is the same as above.

3. Result evaluation:

The more uniform the color yield increase among the dyed samples at each sampling point, the lighter the color yield is, indicating that the retarding effect of the leveling agent is better.