涤纶针织物碱减量和染色一浴一步法工艺

为解决常规涤纶织物染整加工需要碱减量、染色、还原清洗、水洗分步分浴进行所带来的耗时耗能等问题,使用耐碱分散染料,采用“碱减量和染色一浴一步法”工艺对涤纶针织物进行染整加工。分别探讨一浴一步法工艺中烧碱质量浓度、温度、时间对涤纶针织物性能的影响,得到最优工艺:处理温度为130 ℃,保温时间为50 min,烧碱质量浓度为10 g/L。结果表明:使用相同的染料、助剂及烧碱量对涤纶针织物处理,采用一浴一步法工艺得到织物的染色深度值比常规工艺处理得到的织物大,增深10%左右,若要达到相同的颜色,一浴一步法工艺可有效节省染料的用量;采用一浴一步法得到的染色涤纶针织物能达到免还原清洗的效果,染色产品色光稳定,色牢度优异。

Alkali reduction and one-bath-one-step process for dyeing polyester knitted fabric

Polyester knitted fabrics are conventionally dyed with a process consisting alkali reduction,high temperature and high pressure exhaust dyeing,reduction cleaning,and washing.These steps are taking place individually,consuming more time and energy.To solve this problem in this research,polyester knitted fabrics were dyed with alkali-resistant disperse dyes under an alkali condition called one-bath-one-step exhaust dyeing and alkali reduction process.Influences of the dosage of sodium hydroxide,process temperature and duration on the properties of polyester fabrics using the one-bath-one-step process were investigated.An optimized process was obtained as follows:sodium hydroxide 10 g/L,temperature of 130℃and duration of 50 min.It was found that compared with the ones obtained by conventional dyeing process,polyester fabrics treated with the one-bath-one-step process exhibited dyeing depth values 10%higher than the conventional dyeing process.This means that in order to achieve the same color,the use of one-bath-one-step process could save effectively the dosage of dyes.The dyed polyester fabrics treated with the one-bath-one-step process were stable in color and demonstrated excellent colorfastness.