In the context of increasingly stringent environmental protection requirements, dyeing factories in the textile industry are trying to innovate the process of the dyeing section and minimize the use of dyes and chemicals. On the one hand, it can reduce material costs, and on the other hand, it can also reduce pollution emissions. In recent years, darkening agents have appeared on the market, and once they were launched, they attracted countless fans to call them.
Deepening agent is used to increase the dyeing depth of disperse dyes on polyester fabrics An auxiliary agent.
About the mechanism of the deepening agent: after the dye and the deepening agent form a eutectic, it accelerates the diffusion of the former into the interior of the fiber, or the deepening agent puffs the fiber to facilitate the diffusion of the dye into the fiber. its internal diffusion.
Darkening agents can be roughly divided into two categories: those used during the dyeing process and those used after dyeing. The principle of the former deepening is actually to modify the surface of the fiber, thereby changing or improving the surface properties of the fiber, increasing the affinity of the fiber to coatings and dyes, so that the colored materials can be better absorbed and fixed; in addition, the dye can also be changed by changing the fiber surface. Solubility in the solution, or slightly changing the dye structure to improve dyeing performance; the latter’s deepening principle is to cover the fiber surface with a layer of low refractive index material, which can change the fiber’s absorption, reflection and scattering of light. degree, thereby obtaining a better apparent dark effect. This type of deepening agent has very good practical value for dark-colored products where the dyeing depth of the dyed finished product does not meet the requirements, or where the amount of dye is large.
The most common deepening agents currently used on the market are resins and silicone oils used after dyeing.
In fact, after silicone oil finishing, the softness and smoothness of the fabric are not only improved, but the deepening effect is also improved to varying degrees. </p
