The poor water solubility of disperse dyes is almost entirely dependent on the dispersant that coats them to form hydrophilic dye colloidal particles before dispersing the dispersant in water. However, during the dyeing process, due to the shear force of the dyeing solution and the high temperature
Sublimation fastness: refers to the migration and vaporization of dye molecules inside the fabric when heated during high-temperature processing or storage of colored fabrics. Dye molecules will migrate from the fabric to the surface of the fabric when heated, which will reduce the color fastness of
The solution degree of reactive dyes is related to alkaline agentsWhen the alkali agent is added, the β-ethylsulfone sulfate of the reactive dye will undergo an elimination reaction to form its real vinyl sulfone, which is very soluble in genes. Since the elimination reaction requires very few alkal
For reactive dyeing, when the pH value is 7-9, the color difference of the product is normal, indicating that the pH range has little effect on the color difference of the product, and the presence of a small amount of alkali will not change or destroy the chromogenic group of the reactive dye molec
Vat dye yarn dyeing methodVat dye yarn dyeing method, vat dye is a major category of cotton yarn dyeing of current colored fabrics. The dyed yarn is not only bright in color, but also has excellent fastness. Most of the light fastnesses are above level 6, and some varieties are as high as level 8. T
1. Reductive cleaning under alkaline conditions:Soaping agent + reducing agent (sodium sulfide or thiourea dioxide) + alkali (caustic soda or soda ash), but many domestic dyeing factories do not use soaping agent.Soaping agent: non-ionic surface active agent, which is conducive to dissolving, disper
Los colorantes reactivos son una clase de sustancias orgánicas de intensa coloración, utilizados principalmente para textiles en estampado y teñido, se adhieren a los sustratos por una reacción química que forma un enlace covalente entre la molécula de colorante y la molécula de la fibra. El coloran
Vat dyeing process methodThe method of vat dye dyeing process, after vat dye leuco body and then into dyeing insoluble dye. First, it becomes soluble leuco sodium salt through reduction in lye, which is adsorbed by cellulose fiber, and then it is oxidized to return to the original insoluble dye. Gen
1. Constant temperature rapid dyeing method refers to dyeing at a temperature above the glass transition temperature and below the boiling point, and holding it for 45-90 minutes. After most of the dye is absorbed, the temperature is raised to the boiling point to fix, and the fixation time Shorter,
Cationic dyes are a kind of textile dyes, also known as basic dyes and basic dyes. Dissolved in water, it is in cationic state. Cationic dyes are soluble in water and ionize in aqueous solution to generate dyes with positively charged colored ions. The cation of the dye can combine with the acidic g
Characteristics and applications of vat dyesCompared with other dyes, vat dyes have a series of remarkable features.1. The color is mostly intermediateThe color of vat dyes has the characteristics of a complete series from yellow to black, from bright colors to general colors. Its biggest feature is
Clothing fabric is one of the three elements of clothing. Fabrics can not only interpret the style and characteristics of clothing, but also directly influence the performance of clothing color and shape. We briefly introduce the modeling characteristics of different material fabrics and their appli