Inorganic thickeners can be divided into inorganic low molecular weight thickeners and inorganic high molecular weight thickeners according to their relative molecular weight. (1) Inorganic low molecular weight thickener Inorganic low molecular weight thickener is mainly an aqueous solution system composed of inorganic salt and surfactant. At prese

Thickener is a kind of polymer additive, which is widely used in textile printing, food, construction and other fields because it can quickly improve the viscosity and rheology of the system. Adding a small amount of thickener to the required system can greatly improve the viscosity of the system and make it meet the requirements of process and rhe

Wax is a complex mixture of organic compounds. Different kinds of waxes have different compositions and properties. They are classified according to their sources, mainly including natural waxes and synthetic waxes. The former comes from natural existence, and there are mainly three kinds: animal wax, plant wax and mineral wax; The latter comes fro

Hydrogen peroxide bleaching: hydrogen peroxide, also known as hydrogen peroxide, is generally a colorless and transparent aqueous solution with concentrations of 275%, 30% and 35%, and some as high as 50%. The final decomposition product of hydrogen peroxide is ho. Because it is green and pollution-free, hydrogen peroxide bleaching is the most comm

Cotton textile occupies a leading position in the garment industry because of its good moisture absorption, air permeability, easy dyeing, comfortable wearing and good wearing performance. Its market share accounts for 40% of the total fiber consumption in the world. However, when raw cotton fabric is not treated by desizing, scouring, bleaching an

On the basis of the existing synthesis of triethylenetetramine and epichlorohydrin, butyl acrylate was added. The reactive film forming agent can react with the three reactive groups in the same way, which can also play a role in the interaction of the fabric fixing agent. When the fabric is dyed, especially when it is dyed dark and thick, the colo

The method of synthesizing color fixing agent with polyvinylpolyamine and dicyandiamide as main raw materials is similar. The general step is to condense polyhexene polyamine (here, the most common polyvinylpolyamine is diethylenetriamine and triethylenetetramine) with dicyandiamide under the action of catalyst. The reaction steps are shown in Figu

The reactive groups on the molecular branches of the color fixing agent are crosslinked with the reactive groups in the dye and the hydroxyl groups in the fabric fiber respectively. In this fixation mechanism, the color fixing agent acts as an intermediate and reacts with the fabric and dye respectively, making it difficult for the dye to fall off

Color fixing agent molecules combine with dye molecules on the fabric to form insoluble colored precipitation. This is because there are a large number of cationic groups in the molecular chain of the color fixing agent. When these cationic groups meet with the anionic groups in the dye, they will form electrostatic binding, making the color fixing

In foreign countries, many chemical enterprises have successively developed a variety of color fixing agents between the 1920s and 1930s. However, due to the limitation of scientific and technological level, reactive dyes did not appear at that time. Reactive dyes were invented about 20 years later, so the research was carried out according to the

In people’s daily life, textiles are closely related to our life and will not and cannot disappear from the trend of social development. The vigorous development of the textile industry also promotes the development of society. It can be seen that the textile industry plays an important role in China’s economic development.With the cont

Quaternary ammonium salt type polycation color fixing agent can be prepared by reacting ethylene triamine with epichlorohydrin and alkylating with glycidyl trimethylammonium chloride. In addition, reactive color fixing agent and dimethyl diallyl ammonium chloride polymer can be prepared by the reaction of polyamine resin with epichlorohydrin. For e

Surface active agent Most of the color fixing agents in the early stage of World War II were treated with copper salt or cationic surfactant. Copper salt has a group combined with copper ion, which can form chelates with direct dyes, reduce the water solubility of dyes, and make the cloth have better soaping fastness and sun fastness. The hydrophil

Reactive dyes, acid dyes, disperse dyes, cationic dyes, ice dyes and other dyes need water washing and soaping after printing, but it is more difficult than soaping after dyeing, because the soaping bath after printing contains a large amount of polymer slurry. These polymer slurry washed from the cloth is dissolved and mixed with unfixed dyes and

There are many kinds of acid dyes with complete chromatography and bright color. Their molecules contain sulfonic acid group (- SO3H). They are water-soluble anionic dyes. In weak acid, strong acid or neutral bath, they can form hydrogen bond with amide group on silk and wool fiber molecules, and can also form ionic bond with amine group and imine

The chromatograms of reactive dyes are complete Bright color It is widely used in the dyeing of fiber fabrics. Reactive dyes such as alkali and salt are generally used in dyeing. It has a certain dye uptake, and even the fixed dyes will be hydrolyzed at the same time The hydrolyzed dye is adsorbed on the fiber to form floating color These floating

Reduction cleaning belongs to the post-treatment process of polyester textile dyeing or printing. Generally, sodium hydroxide and insurance powder solution are used to treat the fabric to remove the disperse dyes and oligomers adsorbed by the fiber. When polyester fabric is dyed with disperse dyes at high temperature, there are always dyes only ads

Disperse dyes Disperse dyes are a kind of dyes developed with the development of synthetic fibers. In 1921, they were industrialized in acetate fibers. In order to solve the problem of dyeing with water-soluble dyes, Baden aniline soda ash company of Germany produced a kind of dyes with strong hydrophobicity the following year, which was called ace

The main purpose of soaping in the process of reactive dyeing is to remove the floating color on the fiber surface and ensure the quality of dyed products. Floating color is mainly composed of hydrolyzed reactive dyes and unfixed reactive dyes. Under alkaline conditions, the reactive groups of reactive dyes react with water and are replaced by hydr

The dyeing process of reactive dyes is divided into two parts: dyeing and fixation. Dyeing process: This is the initial stage of dyeing. During dyeing, the circulating flow of dyeing solution causes the relative movement between the dyeing solution and the fiber surface. The flow rate of dyeing solution decreases continuously to zero when it is clo