Reactive Dyes
Reactive Dyes
Reactive Dyes
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Factors that affect the dyeing<br />
of cotton with reactive dyes<br />
Cotton<br />
Pre-treatment<br />
Auxiliaries<br />
<strong>Reactive</strong> dye<br />
Dyebath (liquor ratio/flow)<br />
Method:<br />
eg.Temperature and duration<br />
of dyeing<br />
Factors Influencing the Performance<br />
of <strong>Reactive</strong> <strong>Dyes</strong><br />
• Molecular structure of Dye<br />
– Number of reactive groups<br />
– Chemical nature of reactive groups<br />
– Molecular mass (size)<br />
– Number of sulphonic acid groups<br />
– Ratio of sulphonic acid groups to aromatic carbons<br />
• hydrophobic – hydrophilic balance<br />
– Linear / planar structure (shape)<br />
– Other functional groups present<br />
– Realtive positions of functional groups (incl. reactive groups)<br />
Plus characteristics and quantity of impurities / additives<br />
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