Analysis of 8 Common Quality Problems of Polyester Dyeing

Contaminated, broken holes, hook yarn, color pollution, color and color, poor edge, poor head and tail.

One yarn hook

It means that the yarn of the fabric is hooked by the sharp thing and forms a flaw on the surface of the fabric. Once this type of anomaly occurs, it is basically impossible to repair. The willingness to emerge is mainly to allow fabrics to pass through, without sharp burrs, such as cloth trucks, machine tables, and operator hands. Be sure to check frequently. Some operators have more hands, and it is easy to cause hooking on some light fabrics.

II. Stained

This does not need explanation. The main reason is that the operator accidentally dropped the cloth onto the ground or the inside of the cloth was not cleaned during the operation. The other is that some oil on the cloth falls onto the cloth and forms. The main thing is to pay attention to the cleanliness of workshops, trucks, and machines, especially when producing light-colored, white, and bright colors.

Three. Color pollution

The plain fabric is stained with another or more colors. This is mainly due to cloth pollution or staining in other situations. Just pay attention to the cleaning of the cloth before it is used and the cloth is stamped.

Four color points

Refers to the spotted blemishes on plain fabrics, darker in color. This kind of anomaly is more difficult to repair, and generally can only be used for color change. The main reasons for this are as follows: when the dyeing material is used, it is not completely removed, the dissolution is not sufficient, or the stained body of the dyeing tank is stained, the temperature rise is too fast, and uneven dyeing may occur. The solution is also to start from these aspects, when the material is fully stirred. When feeding, use a filter with a mesh of more than 300 mesh to filter, and select a reasonable heating curve. Choose the right dye leveling agent.

Five. Color stains

Color traces are more than color points, and the performance is similar. The main difference between the general color traces and the oil traces is that the traces of oil in the dry condition of the fabric give the impression that the surface of the fabric is water but is actually dry. Oil traces are mainly formed due to the adsorption of dye on the surface of the fabric. When weaving cloth, some of the chemical fiber will add a little oil. Under normal conditions, these oils are automatically decomposed without affecting dyeing after they encounter water. However, some weaving factories use poor quality fabric oils to reduce costs, resulting in defects during dyeing. In addition, the excessive deposition of some impurities in the dyeing cylinder leads to abnormal production. The main sources of these impurities are the oil on the surface of the fabric, the oil in the dyeing auxiliaries, and the like. Continual deposition in the dyeing tank leads to abnormalities. This situation is mainly to enhance the regular cleaning and bleaching of the dyeing tank.

Six color flowers

Color flowers are one of the common anomalies found in dyed plain fabrics. They are mainly characterized by different colors on the fabric and a feeling of printing. The main reasons are that the combination of dyeing formulas is not reasonable, improper selection of dyeing temperature curve is selected, and the feeding is too fast. The solution is to choose a reasonable combination of formulas. Generally, dye suppliers will provide reasonable combinations. Select a reasonable heating curve, according to the formula composition of the dye, the color of the fabric, the amount of casting cylinder to choose a reasonable heating curve. The same is true when feeding. You should choose the speed of feeding, not too fast.

7. Yin and Yang difference

It means that the front and back of the fabric are of different colors. Sometimes it is because the yarns used on the front and back are not the same. The other is that the dye leveling is not good enough to produce. The latter situation is less, the former more.

Eight.

It refers to the fact that the edges of the fabric are the same as the colors in the middle. The main reason is that due to the tension during the dyeing, the edges of the fabric are rolled up and the dyeing is insufficient. If the fabric is very severe after weaving, you can choose a predetermined process. If it is not very serious, you can cook it first and then dye it, but after cooking it out, be sure to pull it out and check if it is boiled. This problem is also related to dyeing equipment.