The textile industry sales staff should understand the printing and dyeing knowledge

With the development of society, the improvement of production and living standards, and the upgrading of products of textile fabric manufacturers, a salesperson of a textile grey fabric must also advance with the times, only knowing a single grey fabric quality index or technology during the sales process. Inevitably, I often encounter some problems. For example, problems that often occur in dyeing often require you to determine whether it is the cause of the dyeing plant or the problem of the grey fabric. At this time, you need to understand some of the printing and dyeing knowledge. Today we will first introduce common problems in textile dyeing. - Primary article.

First, the reasons for the appearance of dyeing defects

1, gray fabric causes: a lot of potential defects in dyed fabric is due to the poor quality of the fabric caused by such as weaving 疪 and yarn 疪 由于 由于 混 混 混 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于Marks such as zonal streaks, for the above problems, such as the salesman to know and understand before selling, the best way to save the bleach to make bleaching cloth.

2, the reason for the pre-treatment: the fabric of a good pre-treatment is the basis for processing high-quality products, poor pre-treatment can cause a lot of defects. 1) The surface of the fabric caused by poor singeing is uneven. Due to the fluffy black flowers caused by the flame gap of the singeing machine, the colored spots, especially the light-colored ones, are produced by the synthetic fibers produced by the singeing. When the singeing machine is improper or contaminated, carbon or tar-like substances are spotted, and the singeing flame is too strong or excessively irritated to give a rough and hard texture. Dispersion is uneven, which can cause stains or stains. Condensation drops or fabrics dripping from rusted pins will rust into the rust when exposed to rust on the surface of the cooking pot. Deep stains and oil stains cause damage. Yes, the grey cloth is not fully brewed, the whiteness is uneven, and the mercerization is uneven. From the previous process to the next dyeing process, the fabric should be cold, the pH value should be neutral, and there should be no residual alkali. This can prevent problems such as head and tail color difference, color depth or light color, fixation, and uneven coloration.

Second, common defects in long-dyeing

1) The wrinkles are caused by the uneven tension of the fabric on the rolling mill or the severe difference in pressure through the nip point, the guide roll bending or deformation, the wear of the guide roll or drying cylinder bearing, and the guide roll or drying cylinder Accumulation of dirt, drying cylinders are not aligned on one line, and the temperature of the drying cylinder is not suitable.

2) The color difference between the left and right sides is mainly due to uneven rolling point pressure, residual alkali agent in the fabric, skin surfactant and silicon salt, etc., different degrees of roll damage, improper roll selection, and other reasons.

3) Dyeing spots, resulting in poor powder modulation, insufficient filtration, improper temperature modulation, improper storage or mixing of slurry dyes, and improper dye bath composition.

4) The main cause of water stains is that the temperature of the top layer of the steamer is too low, and there is condensation in the steamer bowl, and the guide rollers in the steamer do not turn.

5) Washable, poor abrasion and light fastness due to the deposition of unfixed dye on the fabric.

6) Light-colored spots, which are caused by the accumulation of excess lint on the guide roller.

7) Discoloration, Cause of Formation The dye chromophore structure often changes due to changes in some external conditions, causing some changes in the color light, common conditions are temperature, humidity, light and light source.

8) Size-like color difference. The reason is that the size of the dyeing process is different, such as the use of dyeing materials, padding time, fixing time and temperature are not exactly the same, the difference in the use of different weighing equipment, the difference between the pre-processing semi-finished products, water Selection and so on. It will cause different sizes, so the sample must be re-sampled before finalizing the large-scale production process.

Today, for everyone to share here, I would like to explain that printing and dyeing is a more complicated process. For salespersons, printing and dyeing knowledge learning is a compulsory course. In the sales process, this is responsible to both the company and the customer. Knowing the quality of products and understanding the customer's processing technology in advance will be of great help in reducing the quality problems. This is also what good salesmen do.

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