Prevention of imprinting on fabrics when fabric dyeing machine U-type

When various fiber fabrics are dyed on the fabric dyeing machine U-type, whether it is normal temperature or high temperature and high pressure, some marks may be caused, and there are many factors for forming the folding, which need to be analyzed for specific reasons to be avoided. Potential factors in spinning and weaving, such as uneven yarn weaving and shrinkage after twisting, tension during weaving, density differences, especially high-density and high-density fabrics, all affect dyeing.
 
The heat shrinkability of two or more fibers in the blended fabric is inconsistent. Sometimes, although the fabric is pre-formed, stress remains, especially at 130 ° C. The dyeing machine U-shaped dyeing bath ratio is too small is also the cause of the problem, as far as possible, the length of each tube fabric is controlled at 350-400 ITI, especially for thin and high-density fabrics, such as polyester flat spinning, Chun Yafang and the like.
 
Dyeing on the fabric dyeing machine U-type, heating and cooling will directly affect the shrinkage of the fiber, thus forming a fold. For thermoplastic fibers such as nylon, once the fold is formed, it will be irreversible. Therefore, in the dyeing, it is necessary to pay attention to the need to slowly rise/lower temperature within 10 ° C before and after the glass vitrification temperature, generally at a speed of 1 ° C / rain.
 
After the heat treatment, the fabric can not be cooled immediately after dyeing. Do not rush the liquid in the middle of the running process. The water should be washed gradually. After the temperature is lowered, the liquid can be drained. Reasonable selection of processing equipment There are suitable equipment for dyeing and finishing of various fabrics, which should be selected according to the properties of the fabric and the end use.

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