Currently, producing home textile fabrics that meet ecological and environmental protection requirements has become an important direction in product development for home textile product manufacturers. The key to “green dyeing and finishing” is to have a new understanding of the safety of the dyes used and the environmental protection, energy conservation and emission reduction during the product dyeing and finishing process. At present, green processing technology has penetrated into the entire process of pre-processing, dyeing, printing and finishing of home textile fabrics.
Green processing technology in pre-processing
Cold rolling batch pre-treatment processing technology
The pre-treatment adopts cold rolling batch technology, which greatly shortens the pre-treatment process. , on the other hand, it can reduce the investment in related equipment, and can effectively overcome defects such as wrinkles, curling, abrasions, and weft skew that are easily formed during the pre-processing of traditional home textile fabrics. The wastewater volume of this process is reduced by 2/3 compared with the traditional pre-treatment process, and can save 1/3 of energy consumption and time.
Biological enzyme pretreatment processing technology
Biological enzyme pre-treatment processing technology uses biological enzymes to replace caustic soda for pre-treatment, which can significantly reduce the COD value of discharged wastewater. The application of biological enzymes in the pretreatment of home textile fabrics mainly includes biological enzyme desizing and biological enzyme scouring.
Ultrasonic pre-treatment processing technology
Ultrasound is used in pre-treatment processes such as desizing, scouring and bleaching. It can remove various impurities in home textile fabrics and improve processing efficiency.
Green processing technology in the dyeing process
The use of environmentally friendly dyes
Natural dyes mainly come from the leaves, flowers, fruits and roots of plants, and some come from animals or minerals. Using natural dyes to develop some high value-added home textile fabrics is an important way to promote green processing of home textiles in the future.
▲Archroma EarthColors natural dyes
Environmentally friendly reactive dyes can be used in the dyeing processing of cellulose fiber home textile fabrics to replace non-environmentally friendly dyes such as reduced, direct, vulcanized and insoluble azo dyes. In addition, the reactive dye wet short steaming dyeing process can be used. Cellulose fibers or polyester blended home textile fabrics are padded with dyes and then put into a baking oven. After rapid color fixation at a certain temperature and humidity, the dyed product can be obtained by washing with water.
Environmentally friendly dyeing technology
Supercritical carbon dioxide dyeing: It has good dissolving ability for disperse dyes, which can improve the dyeing rate of polyester and cotton home textile fabrics. It has good through-dyeing and leveling dyeing effects, and the dyeing process is short, achieving water-free dyeing. , reducing environmental pollution.
Low temperature dyeing technology:
(1) Reactive dye cold rolling Pile dyeing has simple processing technology and equipment, low cost, low energy consumption, good level dyeing and reproducibility, and high color fixation rate.
(2) Disperse dye additives can be used to solubilize dyeing. Hydrophilic fiber raw materials such as wool and silk can be dyed using phospholipids and other additives. Therefore, disperse dyes can be used to replace quilts. Forbidden acid dyes dye polyester, wool, silk and their blended home textile fabrics, which can not only shorten the dyeing process, lower the dyeing temperature, speed up the dyeing rate, but also improve the dyeing effects of such home textile fabrics such as level dyeing and through dyeing.
Vapor phase or sublimation dyeing: the dyes used need to have strong sublimation properties, such as some non-ionic disperse dyes Or easily sublimable pigments can meet production needs. Since water is not required as a dyeing medium, no sewage is produced, which is beneficial to environmental protection.
Microwave far-infrared dyeing: Microwave heating has good penetration and does not require a heat transfer process. Home textile fabrics made of polyester, polyester-cotton, polyester, etc. as raw materials can be dyed after absorbing microwaves. Self-heating. Compared with traditional dyeing processing, microwave far-infrared dyeing can effectively shorten the dyeing time, have a fast dyeing rate, and significantly reduce energy consumption. </p
