Water-saving polyester cotton dyeing process

According to the water-saving polyester cotton dyeing process, a non-aqueous medium is used for dyeing a polyester cotton blended fabric, a dispersion accelerating agent with a specific structure is adopted, alkali pretreatment is performed on the polyester cotton blended fabric, and a two-stage heating dyeing process is used in a matched manner, so that the leveling property, the dye uptake and the color yield depth of the fabric are improved; the staining of the disperse dye on the cotton is reduced; in addition, the process flow provided by the invention is short, the water consumption is greatly reduced, the utilization rate of the dye is improved, and the method is suitable for industrial application. 本发明公开了一种节水型涤棉染色工艺，利用非水介质对涤棉混纺织物进行染色，采用具有特定结构的分散促染剂，并对涤棉混纺织物进行碱预处理，配合使用两段加温染色工艺，从而提高了织物的匀染性、上染率和得色深度，降低了分散染料对棉的沾色；另外，本发明提供的工艺流程简短，且大大减少了水耗，提高了染料的使用率，适合工业化应用。