With the increase of people's love for hydrophilic nonwovens, a variety of color nonwovens have come out. To keep it color, the color fastness of nonwovens printing can be maintained in the following ways:
1. Choose dyes with good oxidation resistance for hydrophilic non-woven fabrics; For protein fiber, the dyes with good reducing resistance or weak oxidation additives should be selected. Other fibers should be chosen according to the effect on fading.
2, in order to enhance hydrophilic nonwoven azo dye molecule structures, the light of oxidation stability, in the process of dye synthesis, usually in azo ortho introduce some strong electron-withdrawing groups, and reduces the density of electron cloud of the azo group gas atoms.
3. Dye shall be selected according to color depth. The darker the color, the better color fastness to light. The dye with good photostability and compatibility should be chosen.
Therefore, the selection of water-friendly non-woven dyes is very important, and dyes are often used to stain the cloth to maintain its color fastness and color fastness, so as to fundamentally solve the problem and achieve better results.