棉针织物的过碳酸钠漂白

Sodium percarbonate bleaching of cotton knitted fabric

探讨了碱、稳定剂乙二胺四乙酸二钠盐(EDTA)、氧漂活化剂四乙酰乙二胺(TAED)、过碳酸钠用量、漂白温度和时间对织物白度、强力,以及后续染色的影响。优化的棉针织物过碳酸钠漂白工艺条件为:NaOH4 g/L,四乙酰乙二胺(TAED)1 g/L,乙二胺四乙酸二钠盐(EDTA)2 g/L,过碳酸钠10 g/L,80℃漂白60 min。试验表明,与传统双氧水漂白工艺相比,过碳酸钠漂白温度低,处理时间短,碱用量少,织物白度和强力能达到要求,对后续染色没有影响。

The influences of concentration of sodium hydroxide,stabilizer EDTA, oxygen bleaching activator TAED, sodium per- carbonate, and bleaching temperature and time on the whiteness and strength of the bleached fabric, and subsequent dyeing were investigated. The optimum bleaching process of knitted cotton fabric with sodium percarbonate was： NaOH 4 g/L, TAED 1 g/L, EDTA 2 g/L, sodium percarbonate 10 g/L, bleaching at 80 ℃ for 60 min. Compared with traditional hydrogen peroxide bleaching, sodium percarbonate bleaching possessed lower temperature, shorter bleaching time, less dosage of NaOH, satis- factory whiteness and strength of the fabric, without adverse effect on the subsequent dyeing.