黄原胶预处理对汉麻织物喷墨印花效果的影响

Effects of Xanthan Gum Pretreatment on Inkjet Printing of Hemp Fabrics

为解决汉麻印花织物得色量浅、清晰度差的问题,选取黄原胶为预处理剂对汉麻织物进行处理,并进行活性染料喷墨印花。结果表明:与海藻酸钠预处理剂相比,经黄原胶预处理后织物的润湿时间从32.18 s增加到98.19 s,接触角从70.13°提升至84.22°,说明预处理后黄原胶在织物表面构筑的薄膜使织物疏水性增加,进而抑制染料墨水在织物上的扩散,提升喷墨印花效果;当预处理液为1.5%黄原胶、10.0%尿素和2.0%NaHCO_(3),汽蒸时间为10 min时,织物色深达到最大值,此时,青、品红、黄和黑色色块的K/S值比海藻酸钠预处理织物分别提升了33.5%、20.2%、42.6%和109.3%,表明黄原胶预处理喷墨印花汉麻织物表现出优异的表观颜色深度;同时,印花织物的耐摩擦和耐皂洗色牢度均可达到4级以上。

To improve the color strength and sharpness of hemp inkjet-printed fabrics,the hemp fabric was pretreated with xanthan gum.The results show that,compared with sodium alginate pretreatment,the wetting time of XG pretreated fabric increases from 32.18 s to 98.19 s and the contact angle increases from 70.13°to 84.22°.These results indicate that the film constructed by XG on the fabric surface increases the hydrophobicity of the fabrics,which inhibits the dyes on the fabrics and improves the inkjet printing performance.When the pretreatment solution is 1.5%XG,10.0% urea and 2.0%NaHCO_(3),and the steaming time is 10 minutes,the color depth of fabric reaches the maximum values.At this time,compared with SA pretreated fabrics,the K/S values of cyan,magenta,yellow and black color block increase by 33.5%,20.2%,42.6% and 109.3%,respectively,and the XG pretreated fabrics show excellent inkjet printing results.At the same time,the rubbing and washing fastness are all above grade 4.