Polyester has easy access to raw materials, strong and durable, good elasticity, corrosion resistance, good light resistance, easy to wash and fast drying, cost-effective and so on, not only can be pure spinning, but also with a variety of fibers blended or interwoven. Polyester fabrics with high strength and good elasticity and resilience have been used in a large number of end-use areas such as clothing, home textiles, technical textiles and other end-use areas.
Polyester fabrics are usually dyed with disperse dyes in a weakly acidic bath, but their pretreatment and post-dyeing color-fixing treatments, etc., are carried out under alkaline conditions, and the oligomers precipitated from polyester fabrics in the conventional acidic dyeing process often lead to problems such as poor dyeing reproducibility and increased costs.
Polyester alkaline bath disperse dye dyeing has a series of advantages compared with traditional acid bath dyeing. Firstly, alkaline bath dyeing makes the pretreatment and dyeing process carried out in the same bath, and can also eliminate the reduction of cleaning and post-treatment, which is conducive to simplifying the process, reducing wastewater discharge, and improving the production efficiency; secondly, alkaline dyeing can overcome the drawbacks of acid dyeing, and effectively solve the problem of low-polymerization, and make the fiber dyeing performance and appearance of the quality is greatly improved; thirdly, alkaline dyeing can prevent the pre-treatment of some of the dye defects caused by the dye, such as desizing incomplete, insufficient refining, etc. Thirdly, alkaline dyeing can prevent some dyeing defects caused by pre-treatment, such as desizing incomplete, insufficient refining and so on.
Therefore, in recent years, polyester alkaline bath disperse dye dyeing has gradually become a hot spot in the textile printing and dyeing industry. Among them, alkali resistant polyester leveling agent has excellent alkali resistance and stability, and it can play the role of interfacial shift dyeing for disperse dyestuff in the process of polyester alkaline bath disperse dyestuff dyeing to help its uniform distribution.