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The Key Process To Enhance The Value Of Textiles-Dyeing

Dyeing is the application of dyes or pigments on textile materials such as fibers, yarns, and fabrics with the goal of achieving color with desired color fastness.

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A dyeing process is the interaction between a dye and a fibre,the dyeing process can be roughly divided into three stages.
A. Absorbing
Adsorption is the process of attaching the dye to the surface of the fiber; the dye is adsorbed by the fiber in the solution due to inter-molecular forces and electrostatic gravitational forces between ions, etc.
B. Diffusing and penetreating
After adsorption, the dye needs to enter the interior of the fiber and stay inside of the fiber; the adsorbed dye diffuses and penetrates from the fiber surface to the interior of the fiber under certain conditions and enters the amorphous zone of the fiber until the dye concentration in the dye solution, the fiber surface and the interior of the fiber reaches equilibrium.
C. Fixing
This is a key process for good dyeing fastness; the dyestuff entering the amorphous zone of the fiber is linked to the fiber macro-molecules by chemical forces (ionic or covalent bonds), inter-molecular gravitational forces (van der Waals forces) and hydrogen bonds to obtain a certain bonding fastness.
Actually, these three stages cannot be clearly distinguished during dyeing .

dope dyeing

Dyeing is traditionally one of the most water-intensive and environmentally harmful steps of textile manufacturing.

BAICHUAN constantly strives to minimise the amount of water and chemicals used to reduce the impact of the environment, having the recycled products with dope dyeing technology, which is the newly developed and more sustainable dyeing method that need less or no water compared to their counterparts. In dope dyeing, pigments are added to the liquid polymer solution before synthetic fibers are extruded. We hope more products will be used this technology in the future.


Post time: May-26-2022