| 摘要 |
The method is used to produce dyed textile fabrics, especially multi-component mixtures of polyacrylonitrile fibres, wool, and polyamide. It provides tone-to-tone colouring, reduces the technological process duration. Since it is a single bath process, the consumption of raw materials and electric energy is low. The method is carried out in one bath with cationic dyes. The dyeing begins at a temperature of 40 degrees C, pH of 7-8 and lasts for 10 minutes. Next, the temperature is raised to 85-90 degrees C, when dyeing continues for another 15 to 30 minutes. Then the fabric is cooled to 80 degrees C and the process goes on at pH of 4.5-5 for 5 to 15 minutes. Afterwards, the temperature is again raised to 98 degrees C, when dying lasts for 10 to 45 minutes, then it is cooled to 40 degrees C. Eventually, the dyeing bath is discharged.
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