19-08-2014, 11:19 AM
Microencapsulated dyes and chemicals are found to be suitable in textile wet processing and dyeing / printing with microencapsulated disperse dyes is also becoming a well established process colouration of textiles. Sustained release of dye from the microencapsules offers darker and more leveled shade on the polyester fabric.
Microencapsulated dyes and chemicals are found to be suitable in textile wet processing and dyeing / printing with microencapsulated disperse dyes is also becoming a well established process colouration of textiles. Sustained release of dye from the microencapsules offers darker and more leveled shade on the polyester fabric.
In the present work 3 different disperse dyes were microencapsulated using 3 different methods namely simple coacervation, complex coacervation and spry drying. The parameters for encapsulation such as coat to core ratio, nature of dispersing agent and stirrer speed were controlled and final product was achieved successfully. Characterization of microencapsulated product was done using particle size analyzer, DSC, UV-spectrophotometer, SEM and Image analyzer for finding out particle size distribution, thermal analysis, release rate of core dye, morphological studies respectively.
Each of three types of microencapsulated dyes applied on polyester fabric under the same conditions of dyeing. Dyeings were further carried out in exhausted dyebath for analyzing dye uptake by HTHP method. The microcapsules were also tried with a suitable print paste to achieve speckled effect on polyester fabric. The fastness properties of the dyed samples were evaluated for two different dyes.