New Dyeing Process in 2022(Green Dyeing Technology)-2
The new dyeing process includes new technologies such as waterless dyeing and low-temperature dyeing, in addition to the use of natural dyes and computer-controlled dyeing mentioned in the previous article . Let us now look at the specific situation of these related processes. Waterless dyeing process Waterless dyeing is an important dyeing process to reduce dyeing wastewater, and it has many types. Solvent dyeing In the 1960s and 1970s in China, solvent dyeing was studied and popularized. While solvent dyeing has many benefits, some solvents, such as halogenated hydrocarbons, pollute the environment. Furthermore, the solvent recovery equipment must be increased, so it has yet to be popularized and applied. Supercritical carbon dioxide dyeing Supercritical carbon dioxide fluid has been used as a dyeing medium in recent years. Its most notable feature is that it does not dye with water. It can generally be washed without water or only lightly after dyeing. And carbon dioxide is vapori