HT Fine Textile Chemical Auxiliary Agent

4.2 The approaches and measures to improve the fastness to wet rubbing  4.2.1 to choose proper dye Choose high solubility, low substantivity, high diffusivity and high dye-fixing rate dyes and use in the printing process to reduce the unfixed dye. 4.2.2 To improve and complete the printing process continuously To improve and complete the printing process continuously. It provide a standard of the production management, technology index for the manufacturers. In the manufacturing process, the manufacturers should strictly arrange manufacturing according to the related stipulation. And ensure the process of preliminary treatment, making print paste, printing and finishing is done properly. This process will improve the dye absorbing, penetrating, unfixed dye reducing and fastness to wet rubbing.  4.2.3 To brush the fabric before printing In traditional fabric manufacturing process, we do not brush the fabric. But the brushing the fabric before printing have the foll...

Waterborne polyurethane possess good film covering property in itself. If we introduce cationic chain extender at the time of compounding polyurethane, we can  get cationic waterborne polyurethanne. The  waterborne polyurethane dye-fixing principle is as follows: 1. Decreasing the solubility: there are large quantity of cation on the  dye-fixing agent  molecular. It will combine with the anion of the dye and produce insoluble color lake, which will help to improve the water washing fastness. 2. Increasing the adhesion between dye and fabric. The carbamic acid ester in the dye-fixing agent is easy to combine with the fabric and forming the hydrogen bond, which will improve the fastness greatly. 3. Covering the dye and water soluble group. Waterborne polyurethane is net cross-linked structure. It have good film-forming property. Because of the relative molecular mass, it will cover onto the surface of the fabric and form a sealing film which will cover ...