Table of Contents
Polyester Cotton Dyeing
The dyeing sequence of polyester-cotton is the combination of the polyester and cotton dyeing processes. For this reason, this dyeing process is called the double part dyeing process. In this dyeing process, the polyester part is dyed first, then the cotton part is dyed.
Dyeing Flow Chart of Polyester Cotton
The following is the dyeing sequence of polyester-cotton. They are-
Carrier and vessel washed by hydrose and caustic at 1000 °C for 20 minutes.
↓
Load the package in the carrier and feed to the vessel
↓
Add wetting agent, antifoaming agent, and a sequestering agent and run at 600 °C for 10 minutes.
↓
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 minutes.
↓
Peroxide check in the package
↓
Drain
↓
Add acetic acid for neutralization and run for 20 minutes at 500 °C
↓
Drain
↓
Take a sample and check absorbency
↓
Ok
↓
Dyeing period (Polyester part)
↓
Add leveling agent and acid; run at 600 °C for 10 minutes.
↓
PH check
↓
Color mixing at 700 °C for 40 min
↓
Color dosing at 600 °C for 20 min
↓
↓
Sample check
↓
Ok
↓
Temperature: cool down at 780 °C and drain
↓
Hot wash for 10 min
↓
Rinse for 15 minutes for light shade and 25 minutes for a dark shade
↓
Add hydrose and soda ash and run at 800 °C for 20 min
↓
Drain
↓
Neutralization by acetic acid at 500 °C 20 min
↓
Take sample
↓
Carbonizing by acid for 10 – 20 minutes
↓
Neutralization by acetic acid at 500 °C for 20 min
↓
Drain
↓
Dyeing of polyester part is complete
↓
Dyeing period (Cotton part)
↓
Add wetting agent, antifoaming agent, and a sequestering agent and run at 600 °C for 10 minutes.
↓
Color dosing at 600 °C for 20 min
↓
Color migration at 600 °C for 30 min
↓
Salt dosing at 600 °C for 20 min
↓
Run the machine for 20 minutes 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 minutes.
↓
Add acetic acid for neutralization and run for 10 minutes at 500 °C
↓
Drain
↓
Add washing chemical and run at 900 °C for 20 minutes.
↓
Wash sample check
↓
Ok
↓
Drain
↓
Rinse for 10 minutes.
↓
Add fixing chemical and half acetic acid, and run at 500 °C for 20 minutes.
↓
Add softening agent and rest of acid; run at 600 °C for 20 min
↓
Check finished sample
↓
Ok
↓
Drain
It is noted that the dyeing sequence of CVC is the same as that of P/C dyeing. If we want to dye CVC, then we can run the process in the same way as the above process sequence.
5 comments
Md. Raisul Islam Rifat
Thank you so much
Md : Sami Aslam
This is helpful to us
Kurt Russel
Very excellent information. i am always happy if there are people who give their knowledge to everybody for free.
If I would want to print CVC double dyed, how would that work?
RAJENDRA SUTHAR
Very very useful website for starting yarn dyeing plant
md.al-amin sarkar
Dear,
awesome information.each & every articles are so so important for practical work as an engineer. heartiest thanks to all of you.i think you can also provide the technical reason why we will dyeing the polyester part at first,it will be flexible for the viewers.