高稳定连续轧染活性染料染色方案的设计与应用OA

To improve the stability and color fixation effect of continuous pad dyeing with reactive dyes,this study developed a novel reactive dye pad-batch dyeing process by adding alkali agents to the dye bath and precisely controlling the pre-drying temperature and time.The effects of alkali type,dosage,and pre-drying conditions on the color fixation rate were systematically investigated.The composition of dyes on the fabric after pre-drying and the applicability of dyes were analyzed,and pilot-scale experiments were carried out to verify the feasibility of the scheme.The results showed that when Na2CO3 was used as the alkali agent(dosage 5 g/L)with pre-drying at 80℃for 3 min,the color fixation rate of various re-active dyes could be increased by 2%-5%under the same steaming fixation conditions.In the pilot-scale experiment,the K/S value of the fabric samples treated by this scheme was significantly improved,and the color difference within the 2 000 m processing interval was smaller than that of the conventional process,which not only improved the product quality but al-so reduced the control difficulty of the production process.