Influence of dyeing and finishing process on breaking strength of cotton MVS yarn

In order to improve the breaking strength and weaving performance of cotton MVS yarn in color weaving,the influences of dyeing and finishing process on breaking strength of cotton MVS yarn were investigated.The results indicated that the maximum improvement of the yarn strength was obtained when pretreated by one bath NaOH scouring and H2O2 bleaching with concentration of NaOH 5 g /L (I) and one bath enzyme scouring and H2O2 bleaching with concentration of enzymes 10 g /L (Ⅱ) that made the yarn strength increased 9.0% and 13.7% respectively.Four types of reactive dyes including X,KN,K and B were selected to dye the pretreated yarns.The results showed that the strength of the dyed yarns was better than that of the sample before dyeing.Among them,B type reactive got the best results with dosage of 2% (o.w.f) in the case of (Ⅰ) with yarn strength increased by 15.9% and,in the case of (Ⅱ),increased by 24.5%.Data analysis shows that the appropriate wet processing can improve the yarn strength.