In the process of dyeing in HTHP Rapid Dyeing Machine, it is hoped that the dyeing process can be completed in a short period of time and the dye can be fully utilized, and the textile can be dyed evenly without causing deformation or damage of the textile. However, the two tend to be contradictory. In order to obtain satisfactory results in both aspects, it is necessary to control the dyeing process well and adopt appropriate dyeing methods.
Control of initial dyeing rate, transfer dyeing and dyeing rate of high temperature and high pressure fast dyeing machine
The dyeing rate is too slow, and the percentage of dyeing is too low, which will cause economic loss. However, the dyeing rate is too fast and the percentage of dyeing is high, which tends to cause uneven dyeing and impermeability. The dyeing liquid of the high temperature and high pressure dyeing machine is directed from the outer layer of the textile. This is the so-called "transfer" phenomenon.
The time required for the dyeing of a twisted yarn together with a skein of white yarn to the latter is half the color of the former is called the half leveling time. The dye transfer performance can be measured by the half leveling time. It can be seen from the above that the uneven dyeing due to the initial dyeing rate can be improved or remedied by transfer dyeing. This will extend the dyeing time in the case of dye flow.
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