First, the role of glacial acetic acid in textile dyeing
1, in the dyeing process, glacial acetic acid can play a role in fixing the dye. During the dyeing process, the dye needs to chemically react with the fiber molecules in order to firmly adhere to the fiber. Glacial acetic acid, as a neutralizer, can adjust the pH value between the dye and the fiber, so that it is in the best reaction conditions.
2, glacial acetic acid can also form a stable complex with dyes, increasing the binding force of dye molecules and fiber molecules, thereby improving the firmness and durability of dyeing.
3. In textile finishing, adding an appropriate amount of glacial acetic acid can form more ester bonds between fiber molecules, thereby improving the wrinkle resistance and washable resistance of textiles.
2. Application cases of glacial acetic acid in textile printing and dyeing industry
1. Cotton dyeing
In the process of cotton dyeing, glacial acetic acid is used as an assistant to help the dye penetrate into the cotton fiber better and improve the dyeing effect. In addition, it can also be used to adjust the pH value of the dye solution to promote the combination of the dye and cotton fiber.
2. Wool dyeing
Wool fibers have a layer of grease on the surface, which is difficult for dyes to penetrate. In this case, glacial acetic acid is used as an auxiliary agent to remove the grease on the surface of the wool fiber and improve the permeability and dyeing effect of the dye.
3. Polyester dyeing
Polyester is a synthetic fiber that is hydrophobic and difficult to penetrate by dyes. In order to improve the dyeing effect of polyester, glacial acetic acid is used as an additive to help the dye penetrate into the fiber better.
4. Silk dyeing
Silk is a delicate textile that is very sensitive to changes in temperature and pH. In the process of silk dyeing, glacial acetic acid is used as an assistant to control the temperature and pH value of the dyeing solution to ensure the dyeing effect and quality.
5. Printing process
In the printing process, glacial acetic acid is used as the auxiliary agent of the acid printing paste to improve the printing effect and precision. In addition, it can also be used to adjust the pH value of the printing paste to promote the combination of the printing paste and the fiber.
