Dyeing Rate of Nylon 6 Fabric and Yarn Assemblies with p -Aminoazobenzene

Abstract

The dyeing rates of p-aminoazobenzene on nylon 6 fabrics and yarn assemblies at 40°C have been investigated. The apparent diffusion coefficient and the diffusional boundary layer parameter are estimated in such a way that the experimental data fit the theoretical rate curve based on the diffusional boundary layer model. Because the boundary layer parameter can be separated into two distinct components, the relationship between each component and the dyeing condition and the structure of the textile assembly is examined. The component concerned with the dye-fiber-dyebath combination or composition is subdivided into several groups. The component determined by the fluid-flow pattern and rate is dependent on the magnitude of the inter-yarn spaces.