4th Central European Conference 2005, Liberec, Czech Republic, 7 - 09 September 2005, pp.1-6
In recent decades, the use of microwave energy is gaining importance in textile processes. The use of microwave technique in textile wet processing offers many potential advantages: energy savings and reduced processing times, to get improvement in the product quality. Polypropylene is an important polyolefin fibre. It has relatively low price, hydrophobic properties and it is resistant to staining and resistant to many chemicals. However, polypropylene fibres are difficult to dye by the conventional dyeing techniques, because of lacking of dye receptor sites on their molecular structure.
In this work, the use of conventional, high temperature techniques and microwave energy in the exhaust dyeing of polypropylene were studied in order to improve the exhaustion of dye for a given processing time. By using a microwave source, the dyeing time was shortened and the colour yield of the dyed fibre was improved. Selected disperse dyes were used in the dyeings. Dyeing techniques were compared in terms of colour yields, fastness values and tensile strengths of the dyed fibres.