A brief introduction to the precautions for continuous dyeing of polyester webbing on sales!

Polyester webbing on sales refers to the general term for the blended fabric of pure tape cotton and polyester, with tape as the main component. Its characteristics are that it not only highlights the style of tapen but also has the advantages of cotton fabrics. It has good elasticity and abrasion resistance in dry and wet conditions, stable dimensions, low shrinkage, tall and straight, not easy to wrinkle, easy to wash, and fast. Dry characteristics. Let's briefly understand the precautions for continuous dyeing of the webbing!
1. The original webbing factors: the original webbing needs to pay attention to whether the yarns used are of the same batch, because different batches of yarn contain different "oil" conditions, such as blending, it will become a factor in the dyeing process; secondly, Whether the original blank has been pre-treated, the refining treatment of the original blank has a very good dyeing effect, because after the treatment, the "oil" on the yarn is removed and the dye can be directly dyed in contact with the fiber without protection.

2. The pressure of the cylinders at both ends of the dyeing tank (or pad car, dye vat, dyeing machine) is uniform. Factors: The rolling car of the continuous hot melt dyeing machine for webbing generally adopts pneumatic pressure, and there is a cylinder on each side of the roll. After the rolling mill has been running for a period of time, due to the effect of the moisture in the compressed air, the pressure at both ends of the cylinder will be different, resulting in uneven liquid rate of the blank strip and color difference in the edge. In addition, the two ends of the roll of the rolling car are pressurized, which produces a certain degree of deflection, resulting in inconsistent rolling margin between the sides, and also causing color difference between the left and the right.
3. The pressure, concentricity and hardness of the dyeing tank rolls are in production. If you want to minimize the impact of the roll pressure on the left, center, and right color difference, the roll pressure should generally be controlled above 0.2MPa during ribbon dyeing. In the production process, due to the wear of the rolls, the rolls are required to be calibrated and repaired regularly, otherwise it is easy to cause inconsistent rolls due to misalignment of the rolls and lead to inconsistencies. Rolls with different hardness have different rolling margins. Too hard may result in insufficient dye absorption, and too soft may result in too large rolling margins and cause a large amount of dye migration to produce patterns. The hardness of the rolls is determined by the strip.
The above is a brief introduction to the relevant knowledge about polyester webbing on sales.