Polyester - The most versatile synthetic fibre - XII

Iyer, N.D.
September 2002
Colourage;Sep2002, Vol. 49 Issue 9, p89
Trade Publication
Part XII. This is a part of a series of articles about steps in dyeing polyester, a synthetic fibre. The ideal heat setting temperature is about 190 centigrade with a dwell time of 35/45 seconds. The temperature of heat setting is critical as variations in temperature can cause dye pick up variations and variable results. Next step is the correct selection of nozzles for different qualities of fabrics. The speed of circulation of the fabric inside the machine also decides the quality of dyeing. The material liquor ratio plays an important part in the functioning of the machine. It is then required to have a close control on all parameters. The most ideal process is when the fabric is properly bleached and heat set and then taken for jet dyeing. Nowadays, the stress has come on use of utilities like water, power and steam in the functioning of a mill.


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