THE DYEING OF CELLULOSIC KNITTED GOODS BY PADDING METHODS

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Abstract
Traditionally, knitted goods are dyed with direct dyes and after-treated direct dyes, but the modern trend is towards improved fastness, brighter shades, and more economical production. Clearly, these factors are incompatible by conventional methods. There is, however, also an increasing tendency to the production of larger amounts to one shade and, if one looks to the dyeing of woven fabrics, the advantages of padding methods and other continuous treatments are now established. Furthermore, it is recognized that dyeings thus carried out with modern fast dyes and in suitable circumstances can sometimes be more economical than dyeings carried out with direct dyes in the conventional manner. Hitherto it has been assumed that the same techniques cannot be applied to knitted goods, but the increasing importance of knitted goods and the greater emphasis on faster shades have made it worthwhile examining this possibility anew. In the work described in this paper, it has been found possible to dye knitted cotton goods with reactive dyes by the pad-batch process. The variables and problems in the padding of knitted goods and the application of this technique are discussed. In considering changing from batchwise production to continuous production, dyeing is only one link in the sequence of operations, and some consideration is also given to the other aspects of the continuous processing of knitted goods.

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