Jute Dyeing

 

 

Composition and Some Physical and Chemical Properties of Jute Fiber:

Physical Properties of Jute Fiber:

  1. Density-1.47gm/cc
  2. Average Fineness-20 denier, i.e weight in gm. of 900 metres of filament
  3. Tenacity-4.2gm/denier
  4. Average Extension at break-1.2%
  5. Average Stiffness-330 gm/denier
  6. Average Toughness Index-0.02
  7. Swelling water (area) 40%
  8. Specific heat 0.34 cal/g/c0
  9. Specific internal Surface 10-200m2/g
  10. Hygroscopicity (Average regain at 65% relative humidity)-13%

Some Chemical Properties of Jute Fiber

Holocellulose           82-85%
Alpha Cellulose       58-63%
Hemicellulose          21-24%
Lignin                     12-14%
Pactin                   0.2-0.5%                     
Fat & Wax             0.4-0.8%
Protein                 0.8-1.5%
Mineral Materials    0.6-1.1%         

Jute is a ligno-cellulosic, composite natural bast fiber. Cellulose, hemi-cellulose and lignin are its major constituent components & its three dimensional structure is formed by different inter and intra-molecular forces resulted from various physical, chemical, and hydrogen bonds, between them. The commercial fiber consists of hairy strands of cylindrical networks of ultimate jute fiber. Properly retted and washed jute fibers are fairly lustrous with moderate strength but rough to touch. The color of the fiber also varies from creamy white to brown.
 

Jute fabric or yarn can be dyed using the following dyes:

Dyeing

 Dyeing of jute fibres, yarns and fabrics with synthetic dyestuffs

  • Dyeing with direct dyestuffs
  • Dyeing with acid dyestuffs
  • Dyeing with metal complex dyestuffs
  • Dyeing with reactive dyestuffs
  • Dyeing with sulphur dyestuffs
  • Dyeing with vat dyestuffs
  • Dyeing with pigments
  • Dyeing with natural dyes