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How to control the heating rate of high temperature and high pressure dyeing machine

Author:Huaxia TechnologyHits:Published time:2021-01-04
When dyeing with high temperature and high pressure dyeing machine, the heating rate should be controlled correctly. The actual heating rate should be set reasonably according to the levelness of the dyes used, the dyeing depth, the circulation state of the dye solution and different dyeing stages. The usual heating rate is 1 ~ 2 ℃ / min, which can be fast when it is fast, and slow when it is not.


When the dyeing temperature is below 85 ℃, the dye can be heated directly. 85 ℃ - 110 ℃ is the temperature region where the dyeing speed increases rapidly, and the heating speed should be strictly controlled below 1.5/min. The heating rate should be controlled at 2 ℃ / min. The heat preservation time here is for the color of medium depth, the light color can be appropriately shortened, and the dark color can be appropriately extended. Holding time should be appropriate, too short will produce ring dyeing phenomenon, too long is easy to produce wool. Generally, it should be controlled within 30-60min.

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After dyeing, the temperature should be lowered quickly, because oligomer will be produced in the slow cooling process, and the surface of residual line is tar like, which is difficult to remove.


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