What is a dispersive dye? What is the role.

Dye is no stranger to everyone, the color of clothing is dyed out, today this small editor would like to introduce you to what is scattered dye, and its role is what? According to the nature of the dye and the application method, the dye can be classified as follows.
. Direct dyes Such dyes can be dedicted directly on cotton, hemp, silk, wool and other fibers because they do not need to rely on other agents.
its dyeing method is simple, complete color spectrum, low cost.
but its wash resistance and sun resistance is poor, such as the use of appropriate post-treatment methods, can improve the fastness of the finished dyeing product.
2. Insoluble atrial nitrogen dyes These dyes are essentially two intermediates of dyes that are coupled on the fabric to produce insoluble pigments.
because of the printing and dyeing process to add ice, so also known as ice dye.
because it is wash-resistant, sun-resistant fastness is generally better, color spectrum is more qi, rich color, low price, so it is currently widely used in cellulose fiber fabric dyeing and printing.
3. Active dyes, also known as reactive dyes.
these dyes are new dyes developed in the 1950s.
its molecular structure contains one or more active genes, under appropriate conditions, can have a chemical reaction with the fiber, forming a co-price bond binding.
it can be used for cotton, hemp, silk, wool, viscose fiber, nylon, polylon and other textile dyeing.
4. Reduction dyes Such dyes are insoluble in water, in a strong alkali solution with the help of reductive solution to dye, oxidation after dyeing re-converted into insoluble dyes and firmly fixed on the fiber.
because the dye is alkaline, generally not suitable for wool, silk and other protein fiber dyeing.
this kind of dye color spectrum complete, bright color, color fastness is good, but the price is higher, and not easy to even dye.
5. Soluble reduction dye It is reduced from the hidden system of the dye into sodium sulfate salt, into a dye that can be directly dissolved in water, so called soluble reduction dye, can be used as a variety of fiber dyeing.
this kind of dye color spectrum complete, bright color, dyeing convenience, color fastness.
but its price is higher than the reduction dye, and the affinity is lower than the reduction dye, so it is generally only suitable for dyeing light fabrics.
6. Sulfide dyes Most of these dyes are insoluble in water and organic solvents, but can be dissolved in a sulfide solution, after dissolution can be directly contaminated with fiber.
but also because the dye is too alkaline, not suitable for dyeing protein fiber.
this kind of dye color spectrum is more in line, low price, color fastness is better, but the color is not bright.
7. Vulcanized reduction dye The chemical structure and manufacturing method of vulcanized reduction dye is the same as that of general vulcanized dye, and its dyeing fastness and dyeing properties are between vulcanization and reduction dye, so it is called vulcanization reduction dye.
alkali-insurance powder or alkali-sulfide-insurance powder can be used to dissolve the dye when dyeing.
8. Indium dyes are often used as intermediates of dyes, resulting in shrinks and metal atoms on the fabric to form a chromic deposition.
the current color spectrum of these dyes is only blue and green, but because of the very high degree of color fastness, the color is bright and pure, so there is a promising future.
9. Oxidizing dyes Some aromatic amine compounds perform complex oxidation and shrink reactions on fibers and become insoluble dyes, called oxidizing dyes.
this kind of dye can only be said to be a pigment attached to the fiber.
10. Shrink dyes Are temporary dyes made from different kinds of dye master, which attract intermediates with sulfur sulphuric acid in their structures.
in staining, dyes can be retractable synthesis of large molecules gathered in fibers, resulting in excellent staining fastness.
11. Dispersion dyes Such dyes in water solubility is very low, particles are very fine, in the dye is a dispersion, belongs to non-ionic dyes, mainly used for polyester dyeing, its dyeing fastness is high.
12. Acid dyes Such dyes have water-soluble, mostly contain sulfonate-based, nironic and other water-soluble genes.
can be directly contaminated with protein fiber in acidic, weak acidic or neutral media, but the wet treatment is less fast.
13. Acid media and acidic media dyes such dyes include two kinds.
One dye itself does not contain metal ions for media dyeing, and the fabric is treated with a media dye to obtain metal ions before dyeing or dyeing, and the other is to pre-engage the dye with metal ions when the dye is manufactured to form a Media metal complex dyes, this dye before dyeing or dyeing does not need to be processed, such dyes are more resistant to sun, wash fast than acidic dyes, but the color is darker, mainly used for wool dyeing.
14. Alkaline and cation dyes Alkaline dyes early called salt-based dyes, is the earliest synthesis of a class of dyes, because it dissolves in water with a yang charge, so also known as cation dyes.
this kind of dye color bright, complete color spectrum, dyeing fastness is high, but not easy to mix and dye, mainly used for acrylic dyeing.
source: To Chamber of Commerce Friends Network.