It is generally known that mohair tends to lose its luster when dyed for prolonged periods at the boil, and to preserve its luster it is generally necessary to use short dyeing cycles and low dyeing temperatures. Beyond preserving fibre luster, the dyeing of fibres at low temperature does have some advantages from an industrial point of view, namely saving energy, environmental control and fibre protection during dyeing. However, the problem of low temperature dyeing is that it hinders dye diffusion into the fibre, thus decreasing the colour yield of dyed samples. In this study, by using benzyl alcohol as a dyeing auxiliary at lower temperatures, it was possible to dye fibres at both at 90 °C and 80 °C for all dye classes without causing any decrease in colour yield. Dyeing kinetics were also studied, and it was demonstrated that in the presence of benzyl alcohol, the rate constant and Standard affinity increased.

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Solvent Assisted Low Temperature Dyeing. Part I: Results for Mohair (Angora Goat) Fibres

Research and development

Authors:

  • Atav Riza
    Department of Textile Engineering, Namik Kemal University, Tekirdag, Turkey
  • Yurdakul Abbas
    Department of Textile Engineering, Faculty of Engineering, Ege University, İzmir, Turkey

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Abstract:

It is generally known that mohair tends to lose its luster when dyed for prolonged periods at the boil, and to preserve its luster it is generally necessary to use short dyeing cycles and low dyeing temperatures. Beyond preserving fibre luster, the dyeing of fibres at low temperature does have some advantages from an industrial point of view, namely saving energy, environmental control and fibre protection during dyeing. However, the problem of low temperature dyeing is that it hinders dye diffusion into the fibre, thus decreasing the colour yield of dyed samples. In this study, by using benzyl alcohol as a dyeing auxiliary at lower temperatures, it was possible to dye fibres at both at 90 °C and 80 °C for all dye classes without causing any decrease in colour yield. Dyeing kinetics were also studied, and it was demonstrated that in the presence of benzyl alcohol, the rate constant and Standard affinity increased.

Tags: Mohair, low temperature dyeing, benzyl alcohol, solvent, kinetic.ú

Citation: Atav R., Yurdakul A.; Solvent Assisted Low Temperature Dyeing Part I: Results For Mohair (Angora Goat) Fibers. FIBRES & TEXTILES in Eastern Europe 2011, Vol. 19, No. 6 (89) pp. 112-117.

Published in issue no 6 (89) / 2011, pages 112–117.

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