涤/棉织物植物靛蓝染料生态染色工艺

Ecological dyeing process of polyester/cotton fabrics with natural indigo

以葡萄糖代替保险粉作为植物靛蓝染料的还原剂,对涤/棉织物进行染色。为解决涤/棉织物靛蓝染料染色同色性较差的问题,对涤/棉织物采用两浴法染色。探讨了葡萄糖用量、氢氧化钠用量、还原温度、还原时间、染色温度、染色时间等对涤/棉织物K/S值的影响,并测试了染色织物的色牢度。结果显示,植物靛蓝染涤的最佳工艺为:靛蓝5 g/L,葡萄糖10 g/L,氢氧化钠0.5 g/L,60℃还原30 min,pH=5,120℃保温染色30 min;染棉的最佳工艺为:靛蓝5 g/L,葡萄糖40 g/L,氢氧化钠8 g/L,50℃还原30 min,35℃保温染色两次共60 min。两浴法染涤/棉织物可使涤纶和棉纤维有较好的同色性、染色深度和色牢度。

Polyester/cotton fabric was dyed with natural indigo using glucose instead of sodium hydrosulfite as reducing agent. In order to solve the problem of poor homochromism in indigo dyeing of polyester/cotton fabrics, two-bath dyeing method was used for polyester/cotton fabrics. The effects of dosage of glucose and Na OH, reduction temperature and time, and dyeing temperature and time on K/S value were discussed,and their color fastness was tested. The results showed that the best dyeing process of polyester fiber with natural indigo was indigo 5 g/L, glucose 10 g/L, NaOH 0.5 g/L, reducing 30 min at 60 ℃, pH=5, dyeing 30 min at 120 ℃. The best dyeing process of cotton fiber with natural indigo was indigo 5 g/L, glucose 40 g/L, NaOH8 g/L, reducing 30 min at 50 ℃, and dyeing twice at 35 ℃ for total 60 min. This two-bath dyeing process of polyester/cotton fabrics could make the polyester and cotton fibers obtain good homochromaticity, dyeing color depth and fastness.