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Composition of antifouling soaping agent
Soaping is an indispensable step in dyeing with reactive dyes. Most of the soaping agents used in the early stage are soap and other surfactants. These soaping lotions contain many soaps, large water consumption and serious stripping, resulting in fabric defects B9. 4。 The use of single surfactant as soaping agent is difficult to meet the requireme
Anti fouling principle of soaping agent
The soaping process is mainly to remove the dyes that are not bonded with the fiber, hydrolyzed dyes and some additives. Cellulose will swell in water and form a double electron layer with the same charge among fiber, water and floating color. Due to the mutual repulsion of the same charge, the floating color will be separated from the fiber and re
Reactive dyes and the generation of floating color
Reactive dyes are water-soluble reactive dyes, which are mainly used for dyeing cellulose fibers, protein fibers and polyamine fibers. Under suitable conditions, the active groups in reactive dye molecules can react with amino groups in wool and spandex structures and hydroxyl groups in cotton fabrics to form covalent bonds. At this time, dyes and
A new anti-stain soaping agent
Anti-stain soaping agent is used for aftersoaping agent for reactive dyeings and prints.
Metal complex oxygen bleaching catalyst
As we all know, biological enzymes have the advantages of high efficiency, specificity and mild conditions. In recent years, it has been found that using some peroxidases as catalysts in low-temperature bleaching of cotton fabrics has a good effect. The development of enzyme is similar to that of biological simulation, but the stability of enzyme i
Aminonitrile amphoteric and sugar oxygen bleaching activator
The traditional alkali oxygen bleaching system of cotton fabric has some disadvantages, such as high energy consumption, strong damage and so on. The oxidation potential of peracetic acid in peroxy acid bleaching system is higher than that of, and the activation energy is lower than that of hydrogen peroxide. It can be activated at lower temperatur
Comparison of two oxygen bleaching activator
Hydrogen peroxide activator containing carbonyl group is added to hydrogen peroxide bleaching solution, and carbon atoms can interact with Hoo. Nucleophilic addition reaction occurs to produce peroxide organic acid. The activity of these activators depends on the positive electricity of carbonyl carbon atoms and the properties of leaving groups. Al
Organic oxygen bleaching activator
The traditional alkali oxygen bleaching system of cotton fabric has some disadvantages, such as high energy consumption, strong damage and so on. The oxidation potential of peracetic acid in peroxy acid bleaching system is higher than that of hydrogen peroxide, and the activation energy is lower than that of hydrogen peroxide. It can be activated a
Activated hydrogen peroxide bleaching
In the hydrogen peroxide bleaching process, due to the characteristics of low price and excellent effect, sodium silicate was initially widely used as hydrogen peroxide bleaching stabilizer, but it is easy to produce silicon scale on the equipment. Later, people developed organic (non silicon) stabilizers, such as organic carboxylates and fatty car
Current situation of hydrogen peroxide bleaching
Cellulose fibers, protein fibers and their blended fabrics with chemical fibers can be bleached with hydrogen peroxide, and the whiteness and whiteness stability of the bleached products are good; In addition, hydrogen peroxide has a wide range of applications and can be used such as dip bleaching, drench bleaching, roll bleaching and other process
Bleaching of cotton fabric
Since entering the 21st century, the contradiction of large resource consumption and large pollutant emission in the production process of China’s textile industry has become increasingly prominent, which is directly related to the sustainable development of the textile industry. Therefore, promoting energy conservation and consumption reduct
15 questions about disperse dyes
Disperse dyes were produced by Baden aniline soda ash company in Germany in 1922. They are mainly used for dyeing polyester fiber and acetate fiber. At that time, it was mainly used for dyeing acetate fibers. After the 1950s, with the emergence of polyester fiber, it has developed rapidly and become a large category of products in the dye industry.
New textile ecological bleaching technology
With the increasingly severe global environmental problems, energy conservation, emission reduction and green environmental protection have become an inevitable path in the process of development. In the bleaching of textiles, those bleaching methods that have adverse effects on the environment and human health need to be gradually replaced. The ec
Traditional textile bleaching technology
China leads the world in textile production, consumption and export. China’s textiles have a long history, even dating back to the Paleolithic age. With the continuous development in recent years, China has already formed a textile industry with strong competitiveness and complete industrial chain, and the processing supporting level is also
Review on the development of printing and dyeing auxiliaries
The world auxiliary industry began in the 1930s. At first, almost all of it was used in the textile industry. Later, some of it entered the daily chemical industry, such as detergent, but still dominated by textile auxiliary. In the 1950s, it expanded to petrochemical, pesticide, chemical fertilizer, paper, leather, plastics, medicine, beneficiatio
Enzymes commonly used in textile scouring
In the past, it has been considered that the main purpose of cotton fiber scouring process is to remove cotton wax and oil to improve permeability. The commonly used enzymes include pectinase, cellulase, protease, lipase and so on. PectinasePectin is produced by D-galacturonic acid α－ The 1,4-glycoside bonded polysaccharide is the main chain. Some
Revolution of scouring agent — Application of biological enzyme
Textile printing and dyeing industry is not only a large energy consumer, but also a large water consumer, but also a large waste water discharge. The annual water consumption of China’s textile industry exceeds 10 billion tons, and the wastewater discharge ranks fifth to sixth among all industries in China. The water consumption of printing
Main parameters for evaluating fixation performance
Color fastness refers to the performance that the dyes on the textile are subjected to various factors to maintain the original color to varying degrees during the use or subsequent processing of dyed products. The dyeing fastness of fabric is related to fiber type, yarn structure, fabric structure, printing and dyeing method, dye type and external
Types of common color fixing agents
Dicyandiamide formaldehyde color fixing agentDicyandiamide formaldehyde color fixing agent, namely color fixing agent y, was developed in the 1930s. Color fixing agent y is generally used in the fixation of direct dyes and acid dyes, not reactive dyes. When it is used in the fixation of cotton woven fabrics dyed with direct bright red 4BS, the dry
Development process and fixation mechanism of color fixing agent
With the continuous expansion of international textile trade and the improvement of people’s living standards, people’s awareness of environmental protection is also increasing, and the requirements for textile comfort, cleanliness and safety are increasing. After China’s entry into WTO, the textile printing and dyeing industry is
