Sylic Textile Auxiliary Information

Anisotropic expansion of the fiber when it is soaked, that is, the length and diameter of the fiber increase, but the increase in diameter is much greater than the increase in length. For example, the diameter of cotton fiber increases by 14% after being soaked, but the length only increases by 1.1%~1.2%. Therefore, after the fabric is soaked, the fiber in the fabric becomes thicker due to expansion, but the length does not increase much, and the yarn must follow The thickening of the fiber increases the diameter. Read More

The cloth dyed by the long cotton car must be dried in a drying cylinder, and then packed in a large package or stacked in a cloth box. If it is not sufficiently cooled, especially the cloth in a large package, the surface temperature of the fabric may be higher when it is soft. This causes the temperature of the working fluid in the rolling groove to rise (especially in summer), sometimes reaching above 60°C, and when the heat resistance of ordinary silicone oil is not good, it can also cause sticking of the roll. It is better that the temperature in the rolling groove does not exceed 40 ℃. Read More

Improper control of dyeing heating speed Some dyes have poor dispersibility and improper dyeing temperature control. Too fast will cause dye spots; dispersant or penetrating agent is not resistant to high temperature and cause secondary separation of dyes to form dye spots; some additives need to be added separately (high solid content) when adding additives (high solid content), not operating as required Suspended dots are combined with dyes to form dye dots; some color dots are very small and present a dot-like distribution and can only be found by careful observation, and are different from the color light of dyeing cloth. That's because the dye itself contains insoluble substances, and the dispersion of these dyes is destroyed during the manufacturing process and cannot enter the fiber. This situation mostly occurs in light-colored or brilliant-colored systems; the diffusion effect of red dyes may not be good, and a diffusing agent needs to be added to solve it. Read More

Light fastness refers to the degree of discoloration of colored fabrics by sunlight. The test method can be sun exposure or daylight machine exposure. The fading degree of the sample after exposure is compared with the standard color sample. It is divided into 8 levels, 8 is the best, and 1 is the worst. Fabrics with poor light fastness should not be exposed to the sun for a long time, and should be dried in the shade in a ventilated place. Read More