Dyeing of Acrylic Fibers with Reactive Dyes - A Practical Approach

摘要

In general acrylic fibers are dyed with cationic dyes and disperse dyes. Disperse dyes; dye the fibers in a similar manner to that of dyeing polyester fibers with disperse dyes. Cationic dyes fix on the anionic sites in the fiber, by the formation of "ionic bonds". Out of the two dyes cationic dyes give brilliant shades on acrylic material. Reactive dyes rule the dyeing of cotton for the last four decades. Research work led to the invention of different classes of reactive dyestuff. The possibility of dyeing of acrylic material with reactive dyes has been explored in this work. Since there are no reactive groups in the acrylic fiber, we have tried to fix it mechanically by applying "dye fixing agents ". Cationic dye fixing agents are initially fixed on the acrylic fiber by the ionic bonds with anionic sites and then the reactive dyes which are anionic in nature when applied in this bath combine with the cationic dye fixing agent, thus giving a firm linkage. The dyed fibers are tested for fastness, colour strength (K/S) value and reflectance values. For making comparative study reactive dyes are applied on cotton also. When both acrylic and cotton dyed with reactive dyes are compared, encouraging results are obtained with acrylic material.