Study stained aimed at the rational selection and use of dyes, the right to develop and carry out the dyeing process, to obtain high-quality stain finished.
Section I dyed the basics Yard Flags Wholesale
A dyeing theoretical Overview Custom Decorative Garden Flags Wholesale
Fiber immersed in the dye solution under a certain temperature, the dye moved from the water opposite fiber, the dye in the water is gradually reduced, after some time to reach equilibrium. Wind Flags Wholesale Water to reduce the dye, the dye is to move the fiber. Fibers removed at any time, even though the wringer, the dye remained in the fiber, and can not simply make the dye completely out of the fiber, the dye combined with the phenomenon of the fiber, it is called chromatin. Sponge immersed in the dye in the dye solution into the sponge internal, but even a long time, nor change of the concentration of the dye solution, to remove the sponge wringing, dyes and water and from the sponge squeezed out, so that the sponge has not been dyed. Yard Flags Wholesale
(A) staining the basic process in accordance with the theoretical point of view of modern dyeing, dyes have been able to dye fiber, and fabric fastness, because there are a variety of gravity between the dye molecules and fiber molecules sake, the dyeing principle of dyes and dyeing process, dye and fiber characteristics are very different, can not be generalized, but on the dyeing process, generally can be divided into three basic stages. Yard Flags Wholesale
An adsorption fiber put into the dye bath, dye first spread to the fiber surface, and then gradually transferred to the fiber surface by the solution, a process called adsorption. Over time, the concentration of the dye on the fiber gradually increased, the dye concentration in the solution was gradually reduced after a period of time to reach equilibrium. The inverse process of the adsorption desorption, adsorption and desorption in the dyeing process is there at the same time. Personalized Decorative House Flags
Dye diffusion and absorption on the fiber surface to fiber internal diffusion, until the dye concentration in each part of the fiber convergence. As the concentration of the dye adsorbed on the fiber surface is greater than the concentration of dye inside the fiber, prompting the dye by the fiber surface diffusion to the fiber internal. At this point, the spread of dye destroyed the initial establishment of adsorption equilibrium, the dye solution will continue to adsorb to the fiber surface, the adsorption and desorption to reach equilibrium again. Yard Flags Wholesale
Solid dye and fiber combination with different dyes and fibers, which combines also vary.
These three stages in the dyeing process is often exist, can not be separated. Dominant only in a certain period of time of dyeing.
(B) of the dye within the fiber fixed way to dye the fiber, can be considered to be maintained in the fiber-dye process. Different dyes and different fibers, different between them fixing principles In general, the dye is fixed on the fiber there are two types.
A purely chemical fixation refers to the dye and fiber chemical reaction, Custom Swooper Flags Wholesale leaving the dye fixation on the fiber.
For example: reactive dyes to cellulose fibers to each other to form ether bond. Formula is as follows:
The DRX Cell-OH → DR-0-Cell HX
The DRX: active dye molecules Yard Flags Wholesale
X: active groups
(2) physical and chemical nature of solid mutual attraction and hydrogen bond formation between the dye and the fiber, leaving the dye fixation on the fiber. Many dyed cotton dyes, direct dyes, sulfur dyes, vat dyes, etc. are dependent on this gravity and solid fiber.
Second, dye base Yard Flags Wholesale
(A) classification of the dye by dye properties and applications of methods can be dyes for the following categories.