Disperse dyes are a type of non-ionic dye with low water solubility. The earliest dye used for dyeing acetate fibers was called acetate fiber dye. With the development of synthetic fibers, Nylon and polyester have emerged successively, especially polyester. Due to its high integrity, few fiber voids, and strong hydrophobicity, the fibers need to be expanded with a carrier or under high temperature and hot solution in order for dyes to enter the fibers and be dyed. Therefore, new requirements have been put forward for dyes, which require dyes with better hydrophobicity, certain dispersibility, and sublimation resistance. Currently, dispersed dyes used for dyeing polyester fabrics in printing and dyeing processing basically have these properties, but due to the large variety, they must be selected according to processing requirements when used.

Disperse dyes can be roughly divided intodisperse orange、DISPERSE BLUEIt is composed of dispersed yellow and dispersed red, and can be combined with several different dispersed dyes in a certain proportion to obtain dispersed black, dispersed greenDisperse VioletWaiting for dispersed dyes.

In the process of commodity processing, in order to quickly disperse the dispersed dye into a uniform and stable colloidal suspension in water, dye particles are usedfinenessMust achieve1About micrometers, adding dispersants and... during the sanding processwetting agentThe post-processing of dispersed dyes generally includes sanding, seasoningSpray dryingPackaging composition. A lot is needed in the post-processing processauxiliary agentFor examplelignin、MF、Anti-settling agent（SOS）Dustproof agentdispersantNNOAnd I need to addsodium sulfateAdjust the intensity.

Disperse dyes are the most important and major category in the dye industry, which do not contain strong water-soluble functional groupsdyeA type of non-ionic dye that is dyed in a dispersed state during the process. The particle fineness requirement is1μmabout. After producing the original dye, it needs to undergo post-processing, including crystal stabilization, grinding with dispersants, and other commercial treatments, in order to produce itCommodity dyes. Mainly used forpolyesterAnd its blended fabricsprinting and dyeing. can also be used foracetate fibre、nylon、Polypropylene fiber、polyvinyl chloride fibre、acrylic fibersclasssynthetic fibrePrinting and dyeing.

Disperse dyes can be classified into low-temperature, medium temperature, and high-temperature types based on their heat resistance during application.

Low-temperature dye

Low sublimation fastness, good leveling performance, suitable for exhaustion dyeing method, often referred to asEType dye;

High-temperature dye

High sublimation fastness, but poor uniformity, suitable for hot meltdye, calledSType dye;

Medium temperature dye

The sublimation fastness is between the above two, also known asSEType dye.

Using dispersed dyespolyesterWhen dyeing, it is necessary to select dyes according to different dyeing methods.