How to improve the color fastness of the conductive fabric, the color fastness of the fabric refers to the color fastness of the textile, referred to as the color fastness, which is the dyed or printed fabric subjected to external factors during the use or processing, extrusion, friction, washing The degree of fading under the action of rain, sun exposure, light, seawater immersion, saliva immersion, water stain and perspiration is an important indicator of fabric.
The color fastness is good, the textile is not easy to fade during post-processing or use, and the color fastness is poor, and coloring, discoloration, or staining may occur, causing a lot of trouble. Measures to improve the color fastness of light, reasonable selection of dyes, dye selection is the key to improving the light fastness. All dyes will leave a floating dye in the fiber after printing. The more the amount of dye, the more the floating dye will be. The more the fiber has a limit on the adsorption of each dye, that is, the saturation value of the dye, the amount of dye can not exceed About 10% of the saturation value. When the amount of dye greatly exceeds the saturation value, the excess dye can not be dyed and fixed, and can only accumulate on the surface of the fabric to affect the color fastness of the fabric.
The dye is poorly dyed and easily detached from the fiber. The soaping fastness is poor, the washing is not clean after dyeing, and the floating color has residual, which also causes the soaping fastness to decrease, the temperature of the soaping solution, the pH value and the stirring condition. Both have an effect on the soaping fastness. The dye concentration generally has little effect on the soaping fastness, but the dye concentration is high, the dye and fiber combination is supersaturated, and the dye is easily detached by the external force, which also affects the soaping fastness. .
The three primary colors with high light fastness are selected, and the blue chromatogram should use dyes with good light fastness such as Anthraquinone type and phthalocyanine type, and the difference in light fastness will affect the light fastness of the whole mixed color. A dye having a relatively low content in the mixed color component may be selected from a dye having a high light fastness level to ensure the overall color fastness of the fabric.
Fully soaping, washing, minimizing the amount of hydrolyzed dyes and floating color to improve the light fastness of fabrics, the choice of fixing agent, there are currently three kinds of fixing agents, cationic, non-surface active quaternary ammonium salt type, reaction type. Among them, cationic fixing agent and dye form a lake on the fiber. Although the washing fastness is very good, it tends to reduce the original light fastness of the dye, and the light color fabric should be used as little or as little as possible.
The factors affecting the soaping fastness and the factors affecting the color fastness of dyed products are many, but mainly depend on the chemical structure of the dye, the physical state of the dye on the fiber, the degree of dispersion of the dye, the combination with the fiber, the dye concentration, and the dyeing. Methods and process conditions also have a large effect on dye fastness. The properties of the fiber are also strongly related to the color fastness. The same dye often has different fastness on different fibers.
