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Polyester usually refers to a polymer compound obtained by polycondensation of a dibasic acid and a diol, and its basic chain links are connected by ester bonds. There are many varieties of polyester fibers, such as polyethylene terephthalate (PET) fiber, polybutylene terephthalate (PBT) fiber, and 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
The chemical name of polyester is polyester fiber, which is widely used in the textile market, and more and more people like polyester fabrics for clothing. But whether polyester fabrics are good or not, what are the advantages and disadvantages? Such a problem can still make many people confused. T Read More
Disperse dyeing is mainly used for polyester fiber dyeing at high temperature and high pressure. Although the disperse dye molecules are small, it is not guaranteed that all the dye molecules enter the fiber during dyeing. Some disperse dyes will adhere to the fiber surface, resulting in poor fastne Read More
The influence of disperse dyeing The thermal migration of disperse dyes is not the redistribution of dyes in the two phases of fiber and surface solvent under dry heat conditions, but its inherent physical characteristics, which also cause the color fastness and shade variation of polyester-contain 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
According to a Bloomberg report, although the soaring freight rates have brought huge profits to container shipping companies such as Maersk Group and COSCO Shipping Holdings, importers are also facing higher costs that are more difficult to digest. Some companies have raised retail prices, intensif Read More
1. Reduction and 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, Read More
1. Dyeing process The dyeing process can be roughly divided into three stages: A. Absorbing Adsorption is the process in which the dye attaches to the surface of the fiber; the dye is adsorbed by the fiber in the solution due to the intermolecular force and the electrostatic attraction between ions. Read More
Causes of scattered dyeing spots and spots There are two kinds of color spots and spots produced by the high temperature and high pressure dyeing machine when dyeing polyester knitted fabrics:1. The color spots and spots caused by the condensation of dyes can be repaired with a repair agent or strip Read More
In the past two or three years, due to the country's emphasis on environmental protection, the structural reform and environmental protection transformation of the dye industry have been promoted. This has caused many large manufacturers to suspend existing production capacity and small manufacturer Read More
Key points of chemical material operation1. Check the accuracy of the prepared dyes and chemicals according to the prescription list. When disperse dyes are used to make materials, generally use cold water to beat them and mix them evenly (stirring with a mixer for about 20-30 minutes), and then dil Read More
