Save my name, email, and website in this browser for the next time I comment. Diffusion number of Disperse dye is measured with polyester fiber. Melting temperature of this dye is 122-150℃ and they are in crystalline, powder and paste form. Disperse Dyes . As their name implies, these dyes are present in the dye bath as a fine aqueous suspension in the presence of a dispersing agent. Emine Bakan, Fikret Karcı, Ozan Avinc, Synthetic Fiber Dyeing with New Pyrazole Disperse Dyes and Their Colorimetric and Fastness Properties, Fibers and Polymers, 10.1007/s12221-018-7227-y, … BEMACRON SEL/SEB Fluorescent or highly brilliant dyes to achieve dyeings compliant … For this polyester fibres are dyed using carriers or by using high temperature dyeing techniques. In strong alkaline medium, some azo disperse dye undergoes degradation and thus decreases the percent exhaustion. They are found in powder and liquid forms. While they are not soluble in water, they are supplied in a finely ground form that will disperse in water. Different pH values of dyeing liquids often lead to different dyeing results, affecting the color depth, and even causing color change. A polyester film is wrapped around a glass rod and dyed with disperse dyes under simulated conditions. These dyes are highly used for synthetic fiber dyeing like polyester, nylon, tri-acetate, di-acetate etc. Disperse dyes are an important dye class for hydrophobic fibers. The insolubility of disperse dyes enable them to leave the dye liquor as they are more substantive to the organic fibre than to the relatively inorganic aqueous dye liquor. Disperse dyes have many varieties and wide chromatograms, and their sensitivity to pH is very different. Difference between Quality and Reliability, Difference Between Buying House and Trading House, Properties & Classification of Reactive Dyes. Pigment coloration for cellulosic, polyester and polyester/cellulosic blends. polyester is now widely dyed with disperse dye. Small dye molecules with low polarity are levelling, rapid dyeing dyes with poor heat resistance. … They do not have an affinity towards any fiber. It is necessary to pass the test before changing the dye variety and to find out the range of pH stability of the dye. Dalian, 116021, China. Different pH values of dyeing liquids often lead to different dyeing results, affecting the color depth, and even causing color change. It is difficult to obtain medium or dark shades on polyester fibres even by dyeing at the boil because polyester fibres are extremely crystalline and hydrophobic. Disperse dyes have the smallest molecules of all the common dye classes. Acidic medium is used for the application of disperse dye. In a weakly acidic medium (pH 4.5 to 5.5), the disperse dye is in the most stable state. All Right Reserved, Dyeing properties of disperse dyes - PH sensitivity, Dyeing properties of disperse dyes - compatibility, Dyeing properties of disperse dyes - dispersion stability, Basic Violet 10 ( Rhodamine B extra 500% ). RM 17A-14, Block C, Nova Xinghai Centre, No.66-3, Binhe Street, Shahekou Dist. Nowadays, the popularity for synthetic fibers like polyester increases the popularity of Disperse dye also. 2. Please contact with us for product catalogue. Suitable for applications whatever requirements standards: from automotive, exterior textiles, home textiles, apparel and sportswear. The application of heat increases the energy of the dye molecule which accelerates the dyeing of textile fibre. Disperse dyes have the smallest molecules of all the common dye classes. They sublime without decomposition and show gas fume fading. Know Trade Names of Reactive Dyes In Brief! Overall light and wet fastness is good to excellent. Once the dye enters the fibre polymer system the dye molecules are held by hydrogen bonds and Vander walls forces. Diffusion number of Disperse dye is measured with polyester fiber. The dispersing agent is required for making dispersed in water. When the printing paste needs to be printed with the disperse dye and the reactive dye in the same paste, only the dye type which is stable to the alkali can be selected, so that the color light can be not affected by the action of baking soda or soda ash, and special attention should be paid in color matching. By using carriers, they swell the polyester fibre polymer and in so doing allow the disperse dye molecule to enter the polyester fibre more readily. This is an organic substance that is free from ionizing group. In our industry, polyester is now widely dyed with disperse dye. The pH of commercial dye solutions varies, some are neutral and some are slightly alkaline. These dyes exhibit smaller molecular size than the other dyes. For dyeing with disperse dye, dispersing agent is a must. Fig: Partial chemical structure of lignosulphonate & alkylsulphonate and dispersing agent. Disperse dyes are traditionally non-ionic chemic als with sparing solubility in water which, ... properties, rate of dyeing and temperature range properties of the dyes on a range of hydrophobic fibres. Disperse dyes have many varieties and wide chromatograms, and their sensitivity to pH is very different. To form an aqueous dispersion disperse dyes are added to water with a surface active agent. Some varieties are dyed at high temperature even under neutral or weak alkaline conditions, and have no color change phenomenon. These are called low energy disperse dyes. They have no strong solubilizing group present in their structurer. These dyes contain micro-fine dye particles with a diameter below 1 µm as well as varying amount of dispersing agent. Disperse dyes have overall good to excellent light and wet fastness properties. They can be dyed in the same bath as the direct dye or in the same bath as the reactive dye. Share . These are derivatives of azo, anthraquinone, nitro and quinine groups. Their major use today is for the coloration of polyesters, the most important group of synthetic fibers. A feature of disperse dye molecule is their lack of polar groups, evidenced by the insolubility of disperse dyes. They are insoluble in water at room temperature and slightly soluble only at higher temperature. If necessary, formic acid and ammonium sulfate may be added to keep the dyeing solution in a weakly acidic state. Foron® disperse dyes and dyeing auxiliaries are especially selected for cellulosic on polyester, polyester/cellulosic and its blends. As their name implies, these dyes are present in the dye bath as a fine aqueous suspension in the presence of a dispersing agent. Sinoever supplies high quality Disperse Violet 1, Disperse Violet 17, Disperse Violet 25, 26, 27, 28, 33, Disperse Violet 57, 63, 77, Disperse Violet 93, 96. By using high temperature dyeing technique, this is carried out at temperatures above the boil (in the range 100-1300c) and under pressure ranging from 0 to 170 kpa. Disperse dyes have overall good to excellent light and wet fastness properties. Properties of Disperse Dyes. The term “disperse dye” have been applied to the organic colouring substances which are free from ionizing groups, are of low water solubility and are suitable for dyeing hydrophobic fibres. Last modified: Monday, 30 April 2012, 7:26 AM.

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