棉织物超高耐水烫色牢度高效低温净洗工艺

Low-temperature Cleaning Process of Ultra-high Water Fastness after Dyeing Cotton Fabric with Reactive Dyes

活性染料棉织物染色后的常规浮色净洗工艺步骤较多、温度高、用水量大。多胺化合物在弱碱性条件下带正电荷,分子较小,可以与带负电的活性染料及纤维素结合。文中通过单因素试验和正交试验方法复配较优的低温净洗剂并与多胺化合物联合用于活性染料棉织物染色后的浮色净洗,重点探讨了低温净洗后织物耐水烫色牢度的影响因素,以期获得较高的耐水烫色牢度的洗涤工艺。结果表明,与常规皂洗、常规低温净洗后的布样比较,高效低温净洗工艺净洗最高温度为70℃,洗涤废液染料总浓度较低,织物K/S值较大,耐皂洗和耐摩擦色牢度色牢度略高,其中,耐水烫残液吸光度为0,表明沸水洗涤30 min,织物不会掉色,耐水烫色牢度达到最高。

There are many problems in the conventional floating color washing process after reactive dyeing of cotton fabrics,such as too many steps,high temperature and large water consumption.Polyamine compounds are positively charged under weakly basic conditions,and the smaller molecules can be combined with negatively charged reactive dyes and cellulose.In this paper,a single factor experiment and an orthogonal experiment design method are used to mix a better low-temperature cleaning agent and use it with a polyamine compound for the floating color cleaning of cotton fabrics dyed with reactive dyes.In order to obtain a high washing fastness to the washing process,it focused on the factors that affect the color fastness of fabrics after washing at low temperature.The results show that compared with the fabric samples after conventional washing and conventional low-temperature washing,the maximum washing temperature is 70℃,the total concentration of dye in the washing waste liquid is low,the K/S value of the fabric is large,and it is resistant to soaping and rubbing.The fastness and color fastness are slightly higher.The absorbance of the hot water residue is 0,which indicates that the fabric will not fade after washing in boiling water for 30 minutes,and the fastness to hot water is the highest.