Reasons for dark spots in high temperature dyeing machine

1. The main reason for dark spots is that the oil stains on the fabric are not removed during pretreatment, and the oil stains are darker when dyeing by the dyeing machine;

2. There is too much foam in the dye bath, and the mixture of foam, sweater, dye, etc. stains the fabric;

3, or the defoamer oil slick causes dark oil spots;

4. Or the tar in the dye vat gets on the fabric;

5. Or the dyes agglutinate under different circumstances to form dark spots;

6, or excessive calcium and magnesium ions in water quality and the combination of dyes and fabrics.

Therefore, when dark spots appear in high-temperature dyeing machine dyeing, targeted treatment should be carried out, such as adding degreasing and scouring in pretreatment, using low-foaming and non-foaming auxiliaries as dyeing auxiliaries, and choosing anti-foaming agents that are not prone to oil slick. At the same time, in order to prevent the dye from caking, the tank should be cleaned with cleaning agent in time.

For these reasons analyzed above, it is first necessary to strengthen the effect of preprocessing. When choosing additives, choose materials that are not easy to form calcium magnesium soap. When dealing with casual fabrics, it should be loaded evenly and dried evenly and thoroughly.