Latest News and Updates on Textile Auxiliaries and Dyes

In the polyester dyeing process, the heating rate, the holding temperature and the pH value of the dyeing bath have a greater impact on the dyeing quality. Theoretically, under the condition of ensuring that the fabric does not appear colored, the shorter the dyeing process, the lower the dyeing cos Read More

Nylon is a thermoplastic fiber. Therefore, the dyeing rate of the fiber has a great relationship with the temperature, and the dyeing temperature must be higher than the glass transition temperature of the fiber (35～50℃). Nylon fiber starts to absorb dyes at 40℃. As the temperature rises, the dyeing Read More

1. Solubility High-quality reactive dyes have good water solubility in commercial applications. The solubility and the concentration of the dye solution are related to the selected bath ratio, the amount of electrolyte added, the dyeing temperature and the amount of urea and other factors. The react Read More

Unreasonable formulation of the process or improper operation produces color fretting;The process is unreasonable (for example, the temperature rises and falls too fast)Poor operation, knotting during dyeing, and power outage during dyeing;The temperature rises too fast and the heat preservation tim Read More

It is recommended that the dyes used for color repair should have the following properties:①Dyes will not become slow dyeing due to the influence of surfactants. When the color correction operation is carried out, a large amount of anionic surfactant contained in the dye remains in the dye solution, Read More

The Secretary-General of the World Health Organization Tan Desai recently stated that in the four weeks of July, the number of confirmed cases around the world increased by 80%. Southeast Asia, which is ravaged by the Delta variant virus, is currently the most severely hit by the epidemic. The indus Read More

1. Direct dyes Structural properties: Direct dyes are a kind of water-soluble anionic dyes. Most of the dye molecules contain sulfonic acid groups, and some have carboxyl groups. The dye molecules and cellulose molecules are combined by van der Waals forces and hydrogen bonds. Dyeing objects and met Read More

The so-called tarification of dyes refers to the process in which dye particles and surfactants agglomerate into coal tar-like substances under high temperature conditions.There are usually the following 4 factors that cause dye tarizationPoor pretreatment and insufficient purification. The oil (lub Read More

As direct dyes and other accelerating agents for cotton dyeingWhen dyeing cotton with direct dyes, sulphur dyes, vat dyes and Yindioxin dyes, sodium sulfate can be used as a dye-promoting agent.These dyes are easy to dissolve in the prepared dyeing liquor, but not easy to dye cotton fibers. Because Read More

1. Strength. The power is high, the amount of dye used is relatively reduced, and the problems of processing wastewater and pollution are relatively easy to solve.2. Customer's request. The customer is God, if the customer has a clear request to use imported dyes or a certain brand of dyes, the comp Read More

When polyester-cotton blended fabrics are dyed in hot melt, the color matching dyes must also have the same properties as the monochromatic dyes. The melting temperature and time should be compatible with the fixing characteristics of the dye to ensure the highest color yield. Each single color dye Read More

The same color effect (solideffect or union-dye effect) means that two fibers are dyed into similar hue or tone, and the apparent color is deep or the color is similar in intensity, and the color vividness is also close. If expressed by the color characteristic value, the same color effect means tha Read More