What are the dyeing methods of acrylic yarn

Generally, a reasonable dyeing process can be formulated for acrylic yarn. The common dyeing methods of acrylic fiber yarn include constant temperature fast dyeing, saturated dyeing and common dyeing. Constant temperature fast dyeing method refers to starting dyeing at a temperature above the glass transition temperature and below the boiling point, and holding for 45~90min, After most of the dye is absorbed, it will be heated to the boiling point for color fixation. The color fixation time is short, and then it will be slowly cooled to 50 ℃ to wash the car. The key to this method is to select a constant temperature dyeing temperature. Due to the emergence of the third generation of retardants, the insurance coefficient of this method is greatly improved.

Saturation dyeing method used by acrylic yarn manufacturers refers to a dyeing method in which the sum of the product of the amount of dyes and retarders in the dyeing formula and their respective f values is equivalent to the dyeing saturation value of acrylic fibers. The common dyeing method is a dyeing method that combines the advantages of the dyeing method of controlling temperature without retarder and the dyeing method of simultaneously controlling temperature with retarder, and uses the characteristics of the third generation of retarder. Leveling agent 1227 and retarding agent A in the dyeing formula play a synergistic role. Leveling agent 1227 has more functions of diffusion, penetration and cleaning. The dosage of retarding agent in the formula is 0.02% ～ 0.4%, and the dosage of leveling agent 1227 is 0.2% ～ 0.5%.