Cause Analysis of Dark Spots in Dyeing Machines

The main reason for dark stains is that the oil stains on the fabric are not cleaned during the pretreatment, and the oil stains are darker during dyeing by the dyeing machine; or there are too many foams in the dyeing bath, and the mixture of foams, floral sweaters, dyes, etc. sticks to the fabric; or defoaming agents Floating oil causes dark oil spots; or the tar-like substance in the dyeing vat is stained on the fabric; or the dye is agglomerated under different circumstances to form dark stains; or too much calcium and magnesium ions in the water quality combine with the dye to stain the fabric and other reasons.

Targeted treatment should be carried out, such as adding degreaser for scouring during pretreatment, low-foaming and non-foaming additives for dyeing auxiliaries, anti-foaming agents that are not easy to float oil, adding chelating agents to improve water quality, and adding solvent-assisted dispersion Anti-dye agglutination with anti-dye agent, and clean the tank with tank cleaning agent in time.