2000 is a very effective dye fixative for direct and reactive dyestuffs.
The wet fastness properties, including the wash-, perspiration- and cold water bleeding fastness are substantially improved. The product is optimized to give ultra low formaldehyde levels, which are practically undetectable.
Tecufix 2000 can be easily removed.(Procedure on page 3.) Composition: Amino-aldehyde condensate Handling: As with any highly concentrated chemical, observe good industrial hygienic practices and wear appropriate eye and skin protection. See MSDS for details. DOT class.:
NR Properties: Appearance: clear, yellow liquid. Ionicity: cationic Reaction: weakly acidic Solubility: soluble in water, any ratio Specific gravity @ 25 C 1.25 g/ml (10.4 lbs/gal) Storage stability: more than one year. The product may turn darker and cloudy, but the performance is not affected. Freezing characteristics: temperatures below 32F may cause freezing of the product. The product is fully reusable after thawing and stirring. Uses: Tecufix 2000 is a very cost-effective fixative for direct and reactive dyestuffs. The wash- and water bleeding fastness, as well as other wet fastnesses, are greatly improved. As with any fixative, a slight effect on the light fastness and shade of color is to be expected, but is easily manageable when compensated for in the dye formulation. This fixative can be easily stripped according to the recommended procedure on page 3, and redyeing can be carried out without problems
Application: After the dyeing process, the fabric or yarn is rinsed according to the recommendation of the dyestuff supplier. In a fresh bath, a small amount (0.1%) of acetic acid and the Tecufix 2000 are added. The quantity of Tecufix 2000 depends on fastness requirements and depth of shade. In general, 1-4% owg is used. The temperature is raised to 120F, and the treatment continued for 20-30 minutes, after which the bath is dropped and fabric or yarn unloaded. The addition of acetic acid is required to adjust the pH to 5-5.5. A slightly acid condition must be assured to prevent the fiber to smell “fishy” after the application. (amine odor) If this were to occur, a simple acid rinse will eliminate the odor.
Examples: On jets, package machines and other stationary equipment: Rinse after dyeing Fill at 120F or lower temperature. Add 0.5 ml/l acetic acid. (=0.5% owg for jets and package machines; 1.0% owg for becks and other high liquor ratio machines.) Add 1-4% owg Tecufix 2000. (Higher amounts for darker shades.) Heat to 120F if needed Run 20 minutes at 120F. Drop and unload. On continuous washing machines: Rinse and wash after dyeing Separate the last two wash boxes from the others In one before last wash box: 0.5 ml/l acetic acid 1-4% owg Tecufix 2000 Feed in according to speed and fabric weight. Rinse cold in last wash box. On padder, e.g. after printing: 10-40 g/l Tecufix 2000 0.5 ml/l Acetic acid Quantities should be increased if pick-up is less than 70%, e.g. if padding is wet-on-wet. A slight overflow can reduce an accumulation of dyestuff in the padder. Stripping of Tecufix 2000: Both alkaline and acid stripping procedures can be performed, although the alkaline procedure is most effective and more common. We recommend preliminary lab trials to determine the best procedure. 2.0 % owg Caustic soda liquid (50%) 2.0 % owg Tecuron PB-2 15 minutes at 205F Rinse with Acetic acid (1 ml/l) at 120 F Rinse with water or 1.0 % owg Formic acid 0.5 % owg Nonionic detergent (100% active) 20 g/l Common salt 30 minutes at 180-200F