Dyeing sequence of polyester cotton is the combination of polyester and cotton dyeing process. For this reason this dyeing process is called double part dyeing process. In this dyeing process; polyester part is dyed first than cotton part is dyed.
Dyeing flow chart of polyester cotton is given below:
Carrier and vessel washed by hydrose and caustic at 1000 C for 20 min
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Load the package in the carrier and feed in the vessel
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Add wetting agent, antifoaming agent, sequestering agent and run at 600 C for 10 min
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Water solution drain
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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
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Drain
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Add peroxide killer and run at 900 C for 10 min
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Peroxide check in the package
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Drain
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Add acetic acid for neutralization and run for 20 min at 500 C
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Drain
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Take sample and check absorbency
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Ok
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Dyeing period (Polyester part)
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Add leveling agent and acid, run at 600 C for 10 min
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PH check
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Color mixing at 700 C for 40 min
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Color dosing at 600 C for 20 min
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Sample check
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Ok
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Temperature cool down at 780 C and drain
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Hot wash for 10 min
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Rinse for 15 min for light shade and 25 min for dark shade
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Add hydrose, soda ash, run at 800 C for 20 min
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Drain
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Neutralization by acetic acid at 500 C 20 min
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Take sample
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Carbonizing by acid for 10-20 min
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Neutralization by acetic acid at 500 C for 20 min
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Drain
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Dyeing of polyester part complete
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Dyeing period (Cotton part)
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Add wetting agent, antifoaming agent, sequestering agent and run at 600 C for 10 min
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Color dosing at 600 C for 20 min
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Color migration at 600 C for 30 min
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Salt dosing at 600 C for 20 min
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Run the machine for 20 min at 600 C with color and salt
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Soda dosing at 600 C for 40 min
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Cotton dyeing at 600 C for 50 min
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Check sample
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Ok
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Drain
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Rinse for 10 min
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Add acetic acid for neutralization and run for 10 min at 500 C
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Drain
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Add washing chemical and run at 900 C for 20 min
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Wash sample check
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Ok
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Drain
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Rinse for 10 min
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Add fixing chemical and half acetic acid, run at 500 C for 20 min
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Add softening agent and rest half acid, run at 600 C for 20 min
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Check finished sample
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Ok
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Drain
It is note that; dyeing sequence of CVC is as same as P/C dyeing. If we want to dye cvc then we can run the process as same the above process sequence.