棉织物碱氧前处理/活性染料一浴法染色工艺

Process of Cotton's Dyeing with Alkali Oxygen Pretreatment/reactive Dye in One-bath

传统棉织物的前处理和染色是分步进行的,该工艺时间长,操作复杂,劳动量及用水量大,污染严重.通过选择适当的活性染料、练染助剂、双氧水消除剂,控制合适的染色工艺条件,可以得得到棉织物碱氧前处理/活性染料一浴法染色的较佳工艺条件:30%双氧水,质量浓度2 g/L、氢氧化钠质量浓度8 g/L、硅酸钠质量浓度2 g/L、平平加O质量浓度1 g/L、精炼剂质量浓度1 g/L,在浴比1∶20,练漂温度95℃条件下练漂45 m in.加入除氧酶0.5%,调残液pH值为7.加活性红3BS于残液中35℃染色30 m in,70℃固色30 m in.该工艺除上染率稍低外,其他性能均能达到传统染色的水平,并具有染色时间短、生产效率高、能耗低、污水排放少等优点.

Traditional methods of pretreatment and dyeing for cotton fabrics are multi-step and multi-bath procedures,which has such disadvantages as long time,complex operation,intensive of labor,high water consumption and heavy pollution.In this work,the one-bath process was discussed,which included scouring,bleaching and dyeing with reactive dyes.The appropriate reactive dyes,addition agent,H2O2 elimination agent and dyeing technology parametres were determined and the optimum conditions were obtained as the following： the mass concentration of H2O2（30%）,NaOH,Na2SiO3,Peregal O and scoring agent are 2 g/L,8 g/L,2 g/L,1 g/L,and 1 g/L,respectively,bath ratio is 1 to 20,scoring and bleaching at 95 ℃ for 45 min.Adding deoxygenization enzyme 0.5% and controlling the PH value（pH =7）,then adding reactive red dye 3BS in raffinate and dyeing at 35 ℃ for 30 min and fixing at 70 ℃ for 30 min.Scouring,bleaching and dyeing in one-bath process showed such advantages as short time,high production efficiency,reduced energy consumption,relatively low water consumption and reduced sewage emission.The quality of dyed fabric reaches to the level of two-bath process,except of having a slightly dye-uptake.