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    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:

    category
    The proportion
    Brief introduction and common examples
    Monoazo
    More than 50% of the dispersed material

    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)

    Bisazo
    More than 10% of the dispersed material
    The chromatogram is mainly medium and dark, and the chromatogram is mainly orange, yellow and dark blue. The manufacturing process is more complicated, the cost is relatively high, the dyeing performance is general, and the color fastness is general. For example, Disperse Yellow E-RGFL (C.I.disperse Yellow 23), Disperse Orange SE-GL (C.I.disperse Orange 29)
    蒽醌
    占分More than 25% of the dispersed material
    The color is bright, the chromatogram is mainly red, purple, blue, etc., the leveling performance is good, and the light fastness is excellent. The synthetic route is long, the cost is high, and the dyeing performance is excellent, but generally the lifting power is not good, the color fastness is excellent overall, the structure is different, and the color fastness is also different. Such as disperse red E-3B (C.I. disperse Red 60), disperse blue 2BLN (C.I. disperse Blue 56), disperse turquoise S-GL (C.I. disperse Blue 60)
    Heterocycle
    Less than 15% of disperse dyes
    The chromatogram is relatively complete, the color light is fresher, some varieties have fluorescence, the light intensity is high, the manufacturing process is complicated, the cost is high, the dyeing performance is good, and the color fastness is also different. Such as disperse red E-3B (C.I. disperse Red 60), disperse blue 2BLN (C.I. disperse Blue 56), disperse turquoise SE-GL (C.I. disperse Blue 60)

    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:

    Dye classification (symbol) characteristics
    High temperature type S
    Medium temperature SE
    Low temperature type E
    Dye molecule size
    Big
    mid
    small
    Sublimation fastness
    high
    mid
    Medium or low
    Leveling
    Poor
    mid
    good
    Hot melt dyeing, fixing temperature
    200-220℃
    190-205℃
    180-195℃
    Vector staining 100 ° C
    Generally not used
    Available
    Be applicable
    printing
    Partially suitable
    Partially suitable
    Not suitable
    Dyeing depth color application range
    Dark
    Medium, dark
    Light, medium

    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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