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Production process of printing and dyeing factory applying environmental protection immediate chemical dyes程

Production process of printing and dyeing factory applying environmental protection immediate chemical dyes程

The production process of environmental protection immediate dyestuffs in printing and dyeing factories is generally: two soaking and two padding-steaming (102~105℃, 45~60s)-water cleaning-(color preservation solution)-air drying. Roll-coil dyeing is the process of dipping textile fabrics in a pad-dyeing solution, rolling them, leaving them idle for a period of time under the condition of slow rotation, and then post-processing. Energy-saving instant dyes for polyester/cotton (polyester/viscose) textiles: polyester/cotton, polyester/viscose blended cotton fabrics and other chemical fibers with different characteristics are dyed in the same bath. This requires that the instant dyes have high-quality high-temperature reliability and Excellent improving power and repeatability, good color fastness and environmental protection characteristics.

2021-07-07

Difficulties in the application of immediate dyes for environmental protection

Difficulties in the application of immediate dyes for environmental protection

Environmental protection immediate dyes refer to dyes that meet the requirements of environmental protection and can be used in the production process. Environmental protection dyes should meet the following standards and have no or no impact on aromatic amines; the dye itself has no carcinogens, allergens, acute toxic side effects; indoor formaldehyde and purifiable heavy metals after application exceed the limit below the limit; no natural environment growth hormone; no continuous Organic chemical air pollutants; harmful organic chemicals that are not easy to cause environmental pollution; compounds that are not easy to cause environmental pollution; color fastness to washing and performance indicators are better than prohibiting the use of dyes.

2021-07-07

The dyeing principle of environmental protection immediate dye is introduced in detail

The dyeing principle of environmental protection immediate dye is introduced in detail

Environmental protection instant dyes have higher immediacy to cellulose fibers than other dyes. This is mainly because the content of the immediate dye is large, the molecular formula is linear, the symmetry is good, the conjugate system is long, the coplanarity is good, and the van der Waals force between the molecular structure of the dye and the chemical fiber is large. In addition, there are functional groups such as hydroxyl, methyl and formamide in the molecular structure of the immediate dye, which can form covalent bonds with the methyl groups in cellulose fibers and the methyl groups and hydroxyl groups in protein fibers to further improve the dye.

2021-07-07

Application fields and structural characteristics of chemical dyes in dye plants

Application fields and structural characteristics of chemical dyes in dye plants

The role of the attachment of chemical dyes is to help chemical dyes develop their colors, improve the compatibility of chemical dyes and downstream resins, and protect the performance of chemical dyes. Usually the carrier resin is a strong polar resin, on the one hand, it can help color and increase the fluorescence efficiency; on the other hand, it has good compatibility with chemical dyes.

2021-07-07

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