Light and thermal effects on the strength of jute fibre dyed with disperse dyes

Light and thermal effects on degradation of raw and bleached jute fibres dyed with disperse dyes, e.g. Disperse Orange 1, Disperse Red 11 and Disperse Blue 14, have been studied. On prolonged exposure to sunlight in air, loss in breaking strength of raw and dyed raw jute fibres is higher than that of corresponding bleached and dyed bleached jute fibres. Similarly, the loss in breaking strength of raw and dyed raw jute fibres, due to the thermal effect at temperature more than 120 °C, was greater than that of bleached and dyed bleached jute fibres. The loss in breaking strength of dyed raw jute fibre is higher in case of dye-jet than that of dye-gelatin. However, lignin in jute fibres is mainly responsible for photochemical and thermal degradations.