Cotton Dyeing Flowchart of Industry (Winch M/C)

Flowchart of Cotton Dyeing (Bulk)

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Pretreatment Processes

1. Input cold water into tanks
2. Load fabric in the machine through nozzles
3. Steam water (98℃ ✕ 15 minutes)
4. Inject chemicals for scouring & bleaching (Sequestering, lubricating agents, caustic soda, Hydrogen peroxide & peroxide stabilizer)
5. Scouring & bleaching start (98℃ ✕ 40 minutes)
6. Cut shade after scouring & bleaching is completed
7. Wash the sample with detergent and dry it for 5 minutes in an oven dryer
8. Match the shade with the scoured swatch
9. Input cold water into the machine
10. Inject chemicals (neutral acid and enzyme)
11. Bio polishing (55℃ ✕ 40 minutes, pH 4.5)
12. Drain the water

Dyeing Processes

1. Input cold water into the machine
2. Color dosing (60℃ ✕ 35 minutes)
3. Added Glauber salt and soda ash
4. Run time (60℃ ✕ 60 minutes)
5. Cooling (40℃ ✕15 minutes)
6. Match the shade with the dyed swatch
7. Drain water

After Treatment Processes

1. Input cold water
2. Inject chemicals (neutral acid & softener)
3. Wash fabric (45℃ ✕ 15 minutes)
4. Hot wash (80℃ ✕ 10 minutes)
5. Cold wash (30℃ ✕ 10 minutes)
6. Unload the fabric

Winch Dyeing Machine

©Textile Pad

Chemicals Used for Cotton Dyeing of Bulk

1. Jingen sq pbs (Sequestering agent)
2. Jingen lub hgs (Lubricating agent)
3. Caustic soda (Alkali)
4. Jingen strs 200 (Peroxide stabilizer)
5. Jingendt slf14 (Detergent)
6. Jin.neutra acid (Acid neutralizer)
7. Bio j1085 (Enzyme)
8. Everzol (Dyes)
9. Reactobond (Dyes)
10. Hyd.peroxide(50%) (Bleaching agent)
11. Maxbright 4bk (Brightener agent)
12. Soda ash (Alkali)
13. Pearl soft cat (Softener)

Important Factors for Dyeing Cellulosic Fiber

1. The pH of the dye bath
2. Amount of alkali
3. Dyeing temperature
4. Electrolyte concentration
5. Time of dyeing
6. Liquor ratio

pH Parameters in Different Processes

1. Scouring (NaOH) → 11-12
2. Bleaching (H₂O₂) → 10.5-11
3. Enzyme → 4.5-5.5
4. Reactive dyeing → 10.5-11.5
5. Salt → 7-8
6. Softener → 6.5