Dyeing process of polylactic acid fabric.

In Older to solve the difficulty dyeing dark color, the dyeing differences between commercially available PLA dyes and commercially available HA dyes on PLA fabric were compared in the paper, and the effects of dyeing temperature on the bursting strength of PLA fabric were discussed, the effects of dyeing temperature, pH value of dyeing solution, dyeing bath ratio, dyeing time and dye dosage on the depth of PLA fabric using commercially available PLA dyes. After the dyeing temperature effects 115 °C the fabric strength decreases significantly, when the dyeing temperature is 120 °C, the top breaking strength decreases by 11.4%, and the optimized dyeing process is as follows; dyeing temperature 120 °C, pH value 4.5, bath ratio 1:10, holding time 30 min. In order to ensure the level dyeing of fabrics, the temperature should be slowly increased by 0.5-1.0 °C/min between 60-110 °C. Commercially available PLA dyes have good dyeing property, which is suitable for dyeing dark color. The color fastness to rubbing and soaping wash of the polylactic acid fabric after reduction washing are above grade 4, and the standard deviation of K/S value is 0.215, which can meet the color fastness requirements of the garments. [ABSTRACT FROM AUTHOR]