A vacuum-dehydration aided pad-steam process for improving reactive dyeing of cotton fabric. (1st December 2017)

• Record Type: Journal Article
• Authors: Zhang, Xinqing; Fang, Kuanjun; Zhang, Jianfei; Shu, Dawu; Gong, Jixian; Liu, Xiuming
• Is Part Of: Journal of cleaner production. Volume 168(2017)
• Page Start: 1193
• Page End: 1200
• Publication Date: 2017-12-01
• Subjects: Reactive dye -- Cotton fabric -- Dyeing -- Vacuum-dehydration -- Pad-steam process; P-Vac-S pad vacuum-dehydration steam -- P-S pad steam; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.09.112
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The serious colored effluent pollution and high production costs generate new requirements of enhancing dye utilization and reducing energy consumption in reactive dyeing of cotton. A vacuum-dehydration aided pad-steam process with high dye utilization and energy efficiency potential to dye cotton fabric with reactive dye was preliminarily trialed on this purpose. The effects of steaming time, sodium carbonate amount and dye concentration on reactive dyeing were investigated. The color build-up property and rubbing fastness of dyed fabrics were also analyzed. The results show that the steaming time of 3 min and 30 g/L of sodium carbonate were appropriate for dyeing cotton fabric with 25 g/L of C. I. Reactive Black 5. The dye penetration into cotton fibers became poor with increasing dye concentration. Cotton fabrics dyed with the vacuum-dehydration aided pad-steam process had maximum 12% higher K/S value than the fabrics dyed with the conventional pad-steam process, meaning that fewer quantities of dyes could produce higher color strength, which is beneficial to the environmental protection, saving dyes and lowering costs. Rubbing fastness ratings of the dyed fabrics reached equal to or above 3 using the proposed dyeing process, which is suitable for the end use of the fabric. Highlights: A vacuum-dehydration aided pad-steam process with high dye and energy efficiency. The K/S values of dyed fabrics are maximum 12% higher than the conventional process. Satisfactory rubbing fastness and color performance are obtained for dyed fabrics.