Advances in the dyeing and finishing of technical textiles by M. L. Gulrajani

By M. L. Gulrajani

Using dyes and finishes has an important influence at the aesthetic allure and performance of technical textiles. Drawing on key learn, Advances within the dyeing and completing of technical textiles info vital advances during this box and their variety of functions. half one stories advances in dyes and colourants, together with numerous sensible dyes, the results they are often used to create and laws on the topic of their use. half is going directly to examine completing concepts, reminiscent of using enzymes, nanotechnology and speciality polymers.

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The dye in Fig. 5h, CI Basic Yellow 40, is a commercial example, giving yellow on acrylic fibers as well as in daylight pigment applications [166]. The introduction of the cyano group at the 4position of coumarin residue by oxidative cyanation is known to give a red shift [167–171]; the dye in Fig. 5g gives a clear red shade on polyester. Dyes represented by the structure in Fig. 5l give enhanced fluorescence quantum efficiency. An enhanced quantum yield (approaching unity) has been attributed to the rigidization of the donor residue [169].

Aluminum-based pigments can be further modified using an additional silicon dioxide layer, which is wet-chemically deposited. The iron oxide layer is formed with the CVD process after the formation of this SiO2 layer. These pigments show strong color travel effects [21]. 4 Future trends Effect pigments in different formulations and energy saving in the manufacturing process with consistency using a crystal-engineering based approach are the thrust areas. 5 References [1] E. Podszus, Hartstoff-Metall AG, GB Patent 204,055, 1923.

The © Woodhead Publishing Limited, 2013 66 Advances in the dyeing and finishing of technical textiles carbonyl group is the acceptor and the methoxy group is the donor functional group in the molecule. The heterocyclic analogues mentioned in the literature are the anthrapyridone (Fig. 9b), pyrimidanthrone (c, d), azabenzanthrone (g) and aza pyrene (h) dyes [251–255]. Anthraquinone dyes containing an amino group in the alpha positions exhibit a weak fluorescence. The dyes in Fig. 9j and k are claimed as fluorescent dyes [256–258].

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