Ink-jet Printing of Nylon Fabric Using Reactive Dyestuff

Abstract

Conventional nylon fabric is dyeing with acid dyestuff, because this method that nylon fabric only form the ionic bond with acid dyestuff, so in order to achieve better wet fastness, must still after dyeing then make aftertreatment with fix agent. We know using fix agent make aftertreatment is temporary in nature and loses its effectiveness after a few washes . This research is to study ink-jet printing nylon fabric with reactive dyestuff, because reactive dyestuff can be form steady covalent bond with nylon fabric, do not need to use aftertreatment and achieve good wet fastness. The result show that the concentration of GUM NP is 8.0% and used coating method to pretreatment, pattern can achieve better sharpness and lower spreading. Maximum colour yield was achieved at 102℃×30 minutes with saturated steam, and adjust pH value at 5.5 with citric acid, maximum amount of ink can reach 240%. The ink-jet prints displayed excellent wet fastness to repeated wash testing, this study used four reactive dyestuff with colours of cyan, magenta, yellow and black, all colours wash fastness and crock fastness can reach grade 4.