Polyester dyeing common 6 kinds of quality problems analysis!

Some problems often occur in polyester dyeing process:

1. hook yarn

A blemish on the surface of a fabric where the yarn has been caught by a sharp object. Once such exceptions occur, they are essentially unfixable. The main willing is to let the fabric through the place, do not have sharp burrs, such as cloth, machine, operator's hand and so on must pay attention to regular inspection. Some operators more calluses on the hands of some light fabric is easy to cause hook.

2. the fouling

This one doesn't need to be explained. The main reason is that the operator accidentally dropped the cloth to the ground or the cloth inside the car was not cleaned and so on. In addition, some oil stains on the cloth platform fall to the cloth and form. It is mainly to pay attention to the workshop, cloth, machine cleaning and hygiene, especially in the production of some light, white and bright colors.

3. Color pollution

One or more colors on a plain fabric. This is mainly due to cloth contamination or in other cases stained. Just pay attention to the cleaning work before the use of cloth and cloth, cloth cover.

4. Color dot

A dark spot on a plain fabric. This kind of anomaly is more difficult to repair, generally can only do color with. The main reasons are that when dyeing the material, it is not thoroughly good, and the solution is not sufficient or the dyeing cylinder is stained with color, heating up too fast, and the dyeing is not uniform. The solution is also from these aspects, when the material, fully stirring. When feeding, filter with mesh more than 300 mesh, choose a reasonable temperature rise curve. Select the appropriate dyeing homogenizer.

5.Color stain

There are more color stains than spots, and the performance is similar. The main difference between general color stains and oil stains is that oil stains, when the fabric is dry, give the impression that there is water on the cloth, but it is actually dry. Oil stains are mainly formed because of the adsorption of dye on the surface of the fabric. When weaving, some chemical fibers will add a little oil. Under normal circumstances, these oils can decompose automatically in the presence of water and will not affect dyeing. However, in order to reduce the cost, some weaving factories use poor fabric oil, resulting in dyeing defects. In addition, excessive deposition of some impurities in the dye VAT leads to abnormal production. The main source of these impurities is the oil on the surface of the fabric, the oil in the dye auxiliaries and so on. In the VAT of continuous deposition, resulting in the occurrence of anomalies. This situation is mainly to strengthen the regular cleaning and bleaching VAT VAT.

6.Color flower

Color flower is one of the common abnormalities in plain colored fabrics, mainly manifested as different cloth colors, with the feeling of printing. The main reasons are unreasonable combination of dyeing formula, improper selection of dyeing heating curve, fast feeding and other reasons, the solution is to choose a reasonable formula combination, the general dye supplier will provide a reasonable combination. Choose a reasonable temperature rise curve, according to the formula combination of dye, fabric color, cylinder quantity choose a reasonable temperature rise curve. When it comes to filling, it's the same. Should choose after feeding speed, not too fast.