Introduction to reactive dyes

(1) Environmentally friendly reactive dyes with high color fixation rate At present, domestic reactive dyes with high color fixation rate are KE type, ME type and B type, while foreign reactive dyes are Procion H-EXL, Sumifix Supra, Basilen Fm and Cibacron C type. The fixation rate of these new reactive dyes is above 80%, with good leveling and diffusion, not affected by the change of bath ratio, temperature and salt amount, and the washability is also good, with excellent light fastness and sweat fastness due to a suitable one-time exhaustion rate.

(2) low-salt dyeing of environmentally friendly reactive dyes in the reactive dyes dyeing process, commonly used inorganic salts as a dyeing agent applied to the dye solution, high salt content of wastewater, damage to the water ecosystem, crops and human beings pose a serious threat. Sumitomo Corporation of Japan Sumifix Supra NF and E-XF and other environmentally friendly series of dyestuffs, salt dosage of 60% of the general dyestuffs; Cibacron LS-type dyestuffs of the Ciba company's fiber affinity is particularly high, the dyestuffs solubility is good, bonding fastness is high, the use of salt is low, only the general reactive dyestuffs of the 1/3 to 1/2, the rate of dyeing in more than 90%, the rate of color fixation of 80%. Kayacion E-CM dyes, Kayacion E-MS dyes, Kayacion E-S133 dyes developed by Nippon Chemical & Pharmaceutical Company, and Levafix EA, Levafix ES, Levafix OS dyes developed by Dextar Company have the function of low-salt dyeing, with good solubility, good leveling and low salt consumption, which are environmentally friendly. New products.

(3)Environmentally friendly reactive dyestuffs without heavy metals and adsorbable organic halides These reactive dyestuffs mainly include Ciba-cron Black CNN, Black W-NN, Black C-2R, Black LS-N, etc. and domestically produced black reactive dyestuffs such as reactive black KN-GZGC133 (granular material).

(4) Improve the fastness of environmentally friendly reactive dyestuffs These dyestuffs include Cibacron Light-type dyestuffs, Sumifix Supra HF and NF series dyestuffs, Kayacion E-LE and AP-type dyestuffs used for printing, and their fastness to perspiration-sunlight has reached level 3 to 4 and above.