Latest News and Updates on Textile Auxiliaries and Dyes

The effect of decentralized dye dyeingThe heat migration of decentralized dyes is not under dry heat conditions, and the dye is redistributed in the two phases of fiber and surface solvents. Instead, its inherent physical characteristics are also caused. EssenceBy analyzing the effects of dyeing tem

Polyester fiber with decentralized dyes dyed, during the dry heat treatment process, the phenomenon of decreased color targeting and color -light mutation. It is caused by the heat migration of decentralized dyes.The so -called heat migration refers to a phenomenon of migrating from the inside of th

Disperse dye dyeing is mainly because polyester fiber dyeing is high -temperature and high pressure. Although the dye molecules are small, the dye molecules are not guaranteed to enter the fiber during dyeing. The cleaning is to destroy the dye molecules that are not entered into the fiber to improv

Diffusion test: Accurately weigh 1g of dye, add 100mL of 30°C water, stir evenly with a glass rod, drop 4-5 drops of the dye suspension on the filter paper with a pipette, observe its natural seepage circle, good diffusivity the larger its area.Some dye solutions have 1~2 layers of fuzzy seepage cir

Heat migration fastness of disperse dyes:Migrating after dyeing means that after polyester is dyed with disperse dyes, when treated at high temperature (such as heat setting), disperse dyes can produce a kind of thermal migration due to the influence of additives. Thermal migration is a redistributi

Direct printing on polyester fabrics requires high temperature steaming after printing to avoid interpenetration of patterns and colors. Dyes with high sublimation fastness must be selected. In order to prevent patterns from fading under sunlight, light fastness is also very important. In order to r

Nylon/cotton fabrics are dyed with light color, and their nylon components are usually dyed with disperse dyes. The reason is: disperse dyes do not contain water-soluble groups, do not ionize in water, and do not carry active groups. Therefore, disperse dyes dye nylon, there is no ionic bond and cov

Migrating after dyeing means that after polyester is dyed with disperse dyes, when treated at high temperature (such as heat setting), disperse dyes can produce a kind of thermal migration due to the influence of additives. Thermal migration is a redistribution phenomenon of disperse dyes in two-pha

When hot melt dyeing polyester-cotton blended fabrics, color-blocking dyes must also have the same properties as monochromatic dyes. The melting temperature and time should be adapted to the fixing properties of the dye to ensure the highest color yield. Each monochromatic dye has a specific hot-mel

Disperse dyes have many varieties and wide chromatograms, and their sensitivities to pH are very different. Dyeing solutions with different pH values often lead to different dyeing results, which affect the depth of color, and even cause color change in serious cases. In weakly acidic medium (pH4.5～

1. Dyeing spandex with disperse dyes, the optimum process conditions are: temperature 125℃, time 30～40min, pH value 5～6.2. The dyeing temperature should be controlled within the range of 120 to 130 °C. When the temperature is less than 120 °C, the color fastness is not enough, and it is easy to deco

(1) Physical properties of disperse dyes:Wetting, dispersibility, particle fineness, dispersion stability, etc. These properties will affect the preparation of the dye solution and are the main factors for the formation of dyeing spots.(2) High temperature dispersion stability of disperse dyes:Repre