Latest News and Updates on Textile Auxiliaries and Dyes

The hot-melt pad dyeing process is suitable for continuous dyeing of polyester/cotton blended fabrics. Its dyeing principle is also a type of high-temperature dyeing. The difference from high-temperature and high-pressure dyeing is that the melting temperature is high (180℃-220℃) and the time is short. (90 seconds). Read More

Disperse dyes are a type of dye with smaller molecules (molecular weight 200-500) and relatively simple structure. It does not contain strong hydrophilic groups such as sulfonic acid group so3- and carboxyl COOH. It only contains some weak polar groups such as carboxyl groups, amino groups, and nitro groups, and is a non-ionic dye with very low water activity. Read More

Polyester FibersPolyester fiber, commonly known as "polyester", is a synthetic fiber made from chemical polycondensation of organic dibasic acids and glycols. It is a kind of polymer compound and a synthetic fiber with high strength, high modulus and low water absorption.Therefore, traditional water-soluble dyes such as direct, acid, and reactive dyes cannot be adsorbed to this hydrophobic fiber, and therefore cannot be dyed. Read More

Agglomeration in the dyeing of disperse dyes will lead to problems such as color spots, stains, and cylinder contamination. How to prevent the agglomeration of disperse dyes in dyeing, please see the following: 1. The principle of dye aggregationGenerally, the particle diameter of disperse dye is ab Read More

The emergence of disperse dye -alkaline dyeing:When decentralized dye dyeing conventional polyester, the general dyeing bath is generally controlled (pH value is 5-6). Due to dyeing under acidic conditions, most of the scattered dye color light is the purest and high -dye rate. However, polyester si Read More

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 Read More

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 Read More

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 Read More

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 Read More

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 Read More

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 Read More

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 Read More