Cleaner Technology Transfer to the Polish Textile ... - Miljøstyrelsen
Cleaner Technology Transfer to the Polish Textile ... - Miljøstyrelsen
Cleaner Technology Transfer to the Polish Textile ... - Miljøstyrelsen
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Topic 26.<br />
Detergents and complexing<br />
agents for washing after<br />
reactive dyeing<br />
Case illustration:<br />
Use of detergents in<br />
batchwise rinsing in jet<br />
Concept Surplus and non fixed reactive dye-stuffs are highly water soluble. Never<strong>the</strong>less,<br />
detergents and complexing agents are normally used during washing<br />
after dyeing. Both in international literature and in recent Danish projects, it<br />
has been shown that detergents and complexing agents do not improve<br />
removal of hydrolysed reactive dyes from <strong>the</strong> fabric. On <strong>the</strong> o<strong>the</strong>r hand, <strong>the</strong><br />
washing out is improved with increased temperature. In one Danish project,<br />
50 full-scale dyeings have been carried out at various dye-houses without use<br />
of detergents or complexing agents. All have succesfully proven that <strong>the</strong>se<br />
chemicals can be avoided without negative impact on product quality. Avoiding<br />
detergents even tends <strong>to</strong> increase <strong>the</strong> effectiveness of <strong>the</strong> rinse. Rinse without<br />
detergents, complexing agents and modified operation of <strong>the</strong> dyeing process,<br />
should be tried in <strong>the</strong> individual company. This option is documented in<br />
detail in a paper in Part 3.<br />
Improvement potentials Reduction of environmental impacts. Large chemical savings.<br />
Relevance All companies doing reactive dyeing.<br />
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