Environment-friendly dyeing and finishing method for improving wet rubbing fastness of dark cotton fabric

Abstract

The invention discloses an environment-friendly dyeing and finishing method for improving wet rubbing fastness of a dark cotton fabric. The method comprises the steps of pretreatment, dyeing and after-finishing. The fabric is subjected to overflow dyeing with reactive dye after being subjected to an enzyme washing or sanding process, dyeing is promoted with anhydrous sodium sulphate before dyeing, dyeing is carried out with the reactive dye at 60 degrees, and full soaping is carried out at 95 degrees after dyeing, so that it is ensured that water-soluble dye on the fabric and short fibers which are not completely broken due to the jig dyeing enzyme washing process thoroughly fall off under the action of mechanical rubbing force. The dyed fabric with the wet rubbing fastness reaching the standard is fed into the after-finishing procedure, and the finished product is obtained after the after-finishing procedure is completed. Therefore, after the deep cotton fabric is soaped sufficiently, the wet rubbing fastness grade requirement can be met without adding a polyurethane wet rubbing improver again, and the formation of additive spots on the fabric and the discoloration due to high polymers generated by the wet rubbing improver are avoided. The method is applied to improvement treatment of the wet rubbing fastness of the fabric, and has the advantages of environmental protection, energy conservation, efficiency improvement and the like.

Description

technical field [0001] The invention relates to a fabric dyeing and finishing process, in particular to an environmentally friendly dyeing and finishing method for improving the wet rubbing fastness of dark-colored cotton fabrics. Background technique [0002] Dark cotton fabrics have always been a category favored by consumers. In recent years, with the improvement of people's living standards, more and more consumers put forward higher requirements on the physical and chemical properties of clothing. The wet rubbing fastness of dark-colored fabrics has always been a difficult problem for printing and dyeing enterprises. One type is dark-colored fabrics by enzyme washing process; the other is dark-colored fabrics by sanding process. The wet rubbing fastness of enzyme-washed or brushed dark cotton fabrics is difficult to exceed level 2 in mass production, which cannot meet customer requirements. At present, the mainstream method is to add wet rubbing fastness enhancer afte...

AI Technical Summary

Problems solved by technology

The market price of wet friction enhancer is uneven, and the cheap ones are not stable enough. When used in mass production, it is easy to form high polymers during padding and cause additive spots on the fabric.

Expensive stability is fine, but the price is too expensive, which invisibly increases the production cost

In other words, how to improve the wet friction of enzyme-washed and brushed cotton fabrics without adding additives has not been reported in the literature.