Application of foam dyeing technology on ultra-fine polyamide filament fabrics with acid dye

In this approach, the foam dyeing of polyamide filament fabrics with acid dye has been studied as a clean dyeing technology. The foam dyeing process parameters, including the blow ratio (BR), steaming temperature, time and humidity, were evaluated by color strength and color fastness. The results show that dodecanol and sodium carboxymethyl cellulose (CMC) mixed stabilizer could improve the foam stability and reduce the harm to human health. The optimum batch formula of dodecanol and CMC was 4:6. The K/S value reached 3.58 at 11 BR, 100℃ steaming temperature, 20 min and 6.59% fabric moisture content. Compared with the exhaust dyeing process, foam dyeing can achieve the same level of color fastness with a higher K/S value. These results suggest that foam dyeing is a simple and effective method for polyamide filament fabrics with acid dye, which can reduce the consumption of water, chemicals and energy, and accelerate production.