Dyeing of cotton and bast fibres

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  • Typical dyeing processes and energy use for cotton fabric


Typical dyeing processes and energy use for cotton fabric1.jpg


Typical dyeing processes and energy use for cotton fabric2.jpg


Typical dyeing processes and energy use for cotton fabric3.jpg


Literature:Handy Manual: Textile industry,Output of the Seminar on Energy Conservation in Textile Industry, United Nations Industrial development Organization (UNIDO) and Ministry of International Trade and Industry (MITI, Japan), 1992)


  • Typical parameters of the process
Techniques Temperature [°C] Pressure (bar) Heat transfer medium Residence Time Additional information Literature
Batch dyeing or Exhaustion dyeing 100 Hot water 30 min direct dyes manuale page 979
Semi- continous (Pad jig) 60-85 Hot water direct dyes
Semi- continous (Paed roll) 90 Hot water 2-8 h direct dyes
Continous (Pad steam) 60-85 Hot water direct dyes; steaming at 100-105°C manuale page 980

Typical parameters of the process-Dyeing2.jpg


  • Energy consumption
Fibres/Fabrics etc. Process/technique Electricity [kWh/kg] Thermal energy [MJ/kg] Water for dyeing [l/kg] Water for rinsing [l/kg] Dyestuff Literature
Cotton loose fibre dyeing 0,1-0,4 4-14 8-15 8-16 direct, reactive dyes BAT in textile industry, 2003
Cotton yarn dyeing 0,8-11 13-16 15-30 45-60 direct dyes
Cotton yarn dyeing 0,8-1,1 13-16 15-30 60 reactive dyes
Cotton yarn dyeing 0,8-1,1 13-16 100-150° sulphuric dyes

°total water consumption


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