The Dyeing Basic Principle of Flame Retardant Fabric
The dyeing is a process to make the fabric lustrous according to the dye together with flame retardant fabric through chemical or physical chemistry way. Once the dyed flame retardant fabric colour fading, the fabric has been redyed if you want the fabric recover the original color. The flame retardant fabric dyeing process including surface adsorption, internal divergence and dye fixation.
1, Surface adsorption
The dye will be adsorbed the fiber surface when dipped the fiber to the dye liquor, this is the initial stage of the dyeing process. Good appetency and high concentration dye together with moderate electrolyte will increase the fiber adsorption speed, which will help to make the dyeing pricess correctly.
2, Internal divergence
The dye will be diffused to the fiber interior after the dye adsorbed to the fiber surface. This process is the longest stage in the whole dyeing process. In the dye liquor, the fiber surface dye spreads to the low concentration fiber interior, makes the dye added to the fiber surface continuous, until the fiber dye strength same as the dye strength in the dye solution. After transformation finished, the dye adsorption finished on the fiber surface. So, adsorption and diffusion are the inalienable and simultaneous process.
3, Dye fixation
The dye adsorb, diffuse and permeate to the fiber surface and interior, and also fix on the fiber with all kinds of chain, the dye and fiber are diffrent, so as the fixation style, and because of the different fixation style, so as the dye fastness.
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