In dyeing; process sequence can be vary depending on the shade of the material which is required to produce. I have given a process sequence for the light shade dyeing but basic sequence is almost same. Now I like to give a process flow chart of dyeing for medium and dark shade.
Carrier and vessel washed by hydrose and caustic at 1000 C for 20 min
↓
Load the package in the carrier and feed in the vessel
↓
Add wetting agent, antifoaming agent, sequestering agent and run at 600 C for 10 min
↓
Water solution drain
↓
Add wetting agent, sequestering agent, caustic soda and hydrogen peroxide and run at 1100 C for single yarn and 1150 C for double yarn for 20 min
↓
Drain
↓
Add peroxide killer and run at 900 C for 10 min
↓
Peroxide check in the package
↓
Drain
↓
Add acetic acid for neutralization and run for 20 min at 500 C
↓
Drain
↓
Absorbency test of sample
↓
Ok
↓
Dyeing period
↓
Add salt, wetting agent, antifoaming agent, sequestering agent and run at 600 C for 10 min
↓
↓
Color dosing at 600 C for 30 min
↓
Color migration at 600 C for 30 min
↓
Migration package check
↓
Ok
↓
Run the machine for 20 min at 600 C with color and salt
↓
Soda dosing at 600 C for 40 min
↓
Cotton dyeing at 600 C for 50 min
↓
Check sample
↓
Ok
↓
Drain
↓
Rinse for 10 min
↓
Add acetic acid for neutralization and run for 10 min at 500 C
↓
Drain
↓
Add washing chemical and run at 950 C for 20 min
↓
Add washing chemical and run at 900 C for 20 min
↓
Wash sample check
↓
Ok
↓
Drain
↓
Rinse for 10 min
↓
Add fixing chemical and half acetic acid, run at 500 C for 20 min
↓
Add softening agent and rest half acid, run at 600 C for 20 min
↓
Check finished sample
↓
Ok
↓
Drain
So, If anyone wants to get the prove, he can apply this technique in yarn dyeing process for producing medium and dark shade on 100% cotton. Please, let me know the results.
Post a Comment