Precautions for continuous dyeing of buttonhole webbing
- Time of issue:2022-05-20
Precautions for continuous dyeing of buttonhole webbing
(Summary description)The original factor of buttonhole webbing should first pay attention to whether the yarn used is the same batch, because the "oil" content of different batches of yarn is different, because the "oil" on the yarn is removed after treatment,
- Time of issue:2022-05-20
- Views:
1. The original factor of buttonhole webbing should first pay attention to whether the yarn used is the same batch, because the "oil" content of different batches of yarn is different, because the "oil" on the yarn is removed after treatment, and the dye can be directly mixed with the fiber. Touched, stained, unprotected.
2. The pressure of the cylinders at both ends of the cylinder of the dye vat (or pad car, dye vat, and dye machine) is uniform. In addition, the rollers at both ends of the rolling car are pressed, resulting in a certain deflection, resulting in inconsistent edge over-rolling rate and left and right color difference.
3. The pressure, concentricity and hardness of the dyeing groove roller are in production. In order to minimize the influence of rolling pressure on the left, middle and right color difference, the rolling pressure should be controlled above 0.2MPa in general webbing dyeing. In the production process, due to the wear and tear of the rollers, it is necessary to calibrate and repair the rollers regularly, otherwise, it is easy to cause inconsistent nips due to inconsistent rollers, resulting in uneven colors.
4. The influence of infrared pre-baking temperature on the webbing After the polyester webbing has undergone pretreatment and pad dyeing processes, it is generally subjected to infrared (ray) pre-baking treatment before entering the color box to prevent the dye migration process during the drying process. Avoid drift phenomenon, avoid dyeing defects such as color flower, positive and negative color difference.

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