In the process of dyeing fabrics by high temperature and high pressure overflow dyeing machine, some minor problems may occur due to some factors. As a user, it is necessary for us to understand the relevant content in advance and take appropriate precautions. Among them, foam is one of the common problems in the dyeing of high temperature and high pressure overflow dyeing machines.
In fact, during the operation of the high temperature and high pressure overflow dyeing machine, foaming occurs, mainly due to high energy turbulence caused by high speed operation of the fabric and liquid circulation. The main factors affecting the formation of foam are the properties and quantity of dyes and auxiliaries. Therefore, during operation, it is recommended to use a low foaming aid or a solvent pre-refining to eliminate the foam caused by possible staining on the fibers. It is also preferred to use a low foaming dye.
Another common problem is wrinkles. For example, in the process of dyeing polyester fabrics in high-temperature and high-pressure overflow dyeing machines, the wrinkles often appear in the shape of chicken feet. This is because the fabrics are folded and stacked in the stacking area for a long time. relationship. When the cooling of such fibers passes through the secondary glass transition temperature, permanent wrinkles are most likely to occur. In order to avoid such problems, care should be taken not to overload and to properly reduce the dyeing temperature.