The colored polyester fibers currently on the market can be divided into dope colored colored polyester fibers and dyed colored polyester fibers according to different coloring processes. Dyeing polyester fiber adopts traditional dyeing and finishing process. Because polyester has a tight molecular structure, strong hydrophobicity, and does not contain -SO3-, -COO- and other hydrophilic groups in the molecule, it is difficult to dye with hydrophilic dyes at room temperature. It needs to be dyed under high temperature and high pressure, the chromatogram is limited, and the dyeing energy consumption is high, the cost is high, the dyeing discharge amount is large, and the economic and social benefits are limited.
The application of the dope coloring technology of polyester fiber is relatively lagging and small in scale. Relatively speaking, colored fiber spinning and colored silk yarn weaving technology is a traditional basic textile technology. With the maturity of digital textile technology, it has been widely used and continuously developed in traditional silk, woolen and cotton yarn-dyed fields. , Improving day by day.
At present, the dope coloring technology of polyester fiber is mainly used in the yarn-dyed fields of tarpaulin, umbrella cloth, advertising banner and flag cloth, lining cloth, school uniform and military uniform fabrics, etc., where the product specifications have not changed much and the trade orders are relatively large.
www.huacaifiber.com
