Classification of disperse dyes
source : | Author: admin | release time: 2019-08-12 | 399 次浏览
There are usually two ways to classify disperse dyes:
One is divided according to chemical structure. According to the chemical structure, it can be mainly divided into azo type and heterocyclic type, among which azo type is mainly used, and azo type is divided into monoazo type and disazo type. type.
See the table below for details:
The molecular weight is generally 350-500, the manufacturing process is simple, the cost is relatively low, the chromatogram is complete, the leveling property is excellent, the lifting power is high, and the color fastness varies greatly due to the structure. Available in light, medium and dark series. Such as disperse blue H-GL (C.I. disperse blue 79), disperse ruby S-2GFL (((C.I.disperse Red 167), disperse ruby SE-GL (C.I. disperse Red 73)
Another classification by application performance, most of which is currently d on the classification method of Foron series of disperse dyes from Sandoz, Switzerland, which is mainly d on dye sublimation fastness. The detailed classification is shown in the following table:
There are also some dye manufacturers in foreign countries that divide them into H, M, and E according to the sublimation fastness of dyes, which correspond to the above S, SE, and E types. For example, Disperse Blue H-GL (C.I. disperse blue 79) Disperse Red H-2GL (C.I. disperse red 167) Disperse Blue M-2R (C.I. disperse blue 183)
British Imperial Chemical Company (ICI) Dispersol series of disperse dyes are divided into five categories: Class A sublimation fastness is low, mainly acetate fiber and polyamide fiber; Class B, C, D are suitable for polyester fiber (equivalent to E, SE respectively) , S three categories), P class is dedicated to printing. Such as Dispersol Scarlet A-B, Dispersol Blue B-R, Dispersol Green C-6B, Dispersol Brilliant Scarlet D-SF, Dispersol Red P-4G.
Kayalon Polyester series of disperse dyes of KYK are divided into four categories according to their sublimation fastness and dyeing properties: S, SF, SE, E; according to sublimation fastness and light fastness There are four categories: LS, L-SF, L-SE, LE. Such as Kayalon Polyester Orange R-SF, Kayalon Polyester pink RCL-E, Kayalon Polyester rubine BL-S, Kayalon polyester Turquoise blue GL-S, Kayalon Polyester blue FBL-E, Kayalon Polyester yellow YL-SE, Kayalon Polyester red TL-SF .
Due to the large number of disperse dye manufacturers, these naming conventions are only part of the disperse dye designation. However, the naming of dyes by manufacturers also draws on each other, and the naming rules also have similarities. Therefore, the naming rules listed above have certain representativeness, which is suitable for giving inferences and broadening the horizon, which is conducive to deepening the understanding of the names of disperse dyes.
With the development of synthetic fiber technology, new synthetic fibers are continuously introduced into the market, especially ultra-fine fibers. The large specific surface area of polyester microfibers has a high dyeing speed, which has certain influence on dyeing uniformity and reproducibility. Dyeing performance puts forward new requirements. Domestic and foreign dye manufacturers have introduced disperse dyes suitable for polyester microfiber series, such as light-colored three primary colors AC-E, medium-dark UN-SE series, dark DMD, DRD and other series.
According to the demand of energy saving and emission reduction, we have launched series of rapid dyeing, small bath ratio dyeing, no-reduction cleaning, and no steam washing printing. According to the color fastness requirements of fabrics, high lightfast series, such as products for home textiles, sportswear and motorcycle fabrics; high-washing series according to the wet fastness requirements of fabrics; Oeko-Tex Standard 100 according to eco-friendly requirements Class I (infant and child care) series, (adsorbable organic halide) series, etc.;
According to the characteristics of the dye itself, it launches fluorescent, bright color series, high-strength series, etc.; discharge printing series and alkaline discharge printing series according to dyeing printing method; weak alkaline dyeing series and strong alkaline dyeing according to dyeing pH value series. In summary, with the development of dye synthesis and application technology, the acceleration of synthetic fiber and fabric renewal, the energy-saving emission reduction of printing and dyeing industry, and the environmental protection of garment industry, dye manufacturers at home and abroad are constantly introducing new series of disperse dyes. Adapt to the changing and demanding of the market, that is, the classification of disperse dyes will be more detailed, and the basis for classification will become more and more extensive.
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