Flame retardant fabric will fade for a long time, what causes the fabric is easy to fade, the process is more complicated.
How to improve and optimize the performance of dyes is an important means to overcome the fading of dyed clothing.
Flame-retardant fabrics and fire-retardant clothing after repeated washing and long-term sun, so that clothing dyes occurred photolysis and aging, so that clothing appeared faded.
Such as dye molecules containing amino (-NH2) or hydroxyl (-OH) and other auxochromes more prone to oxidation and reduce light fastness. The dye molecules containing hydrogen bond can be formed, or hydroxyl (-COOH), sulfo (-SO3H), nitro (-NO2) and other groups, will improve the dye's ability to light.
In addition, the dying of dyed clothing is also related to the structure of the dye molecules. Dye molecules, the stability is poor, the dying of dyed clothing is also related to the structure of the dye molecules. Dye molecules, poor stability, strong ability to respond to hydrogen atoms can promote the oxidation process.
Due to the oxidation of the dye molecules or reduction reaction, leaving dyed clothing discoloration. Such as azo dye dyed cotton fabric faded by the sun, is due to the result of oxidation, and with the same dye dyed protein fiber fabric fading by the sun, it is the result of the reduction.
In short, the reasons for the fading of the dyed clothing depend on the affinity of the dyestuff for the fabric fiber, the spectral characteristics of the dyestuff, the concentration of the dyestuff, the humidity of the dyestuff, the chemical structure of the dyestuff and so on. It is not difficult to see that the main reason for the fading of dyed clothing is determined by the characteristics of the dyestuffs.