Abstract
Heat setting of nylon was carried out by dry process. And the equilibrium and the rate of dyeing were studied. The experiment showed that the amounts of absorbed dyes at equilibrium, and the rate of dyeing decreased by heat setting.
From the experimental results, it was suggested that the changes of inner structures, expressly crystallization, were caused by heat setting, therefore the amounts of amino end groups in amorphous parts decreased, and then the paths of diffusion decreased too.
