食用色素对壳聚糖改性纤维染色性能的研究

为了研制符合食品包装要求的彩色防水纸浆模塑制品,选用食用色素对壳聚糖处理后的纸浆纤维进行染色,并在染色纸浆中加入防水剂H,讨论了防水剂质量分数对纸浆纤维防水效果和染色效果的影响。结果表明,染色温度为60℃,染料用量为0.6%(对绝干浆质量),染浴pH=3.5的条件下染色效果较好。结合生产实际,可进行常温染色,上染率达71.43%,褪色率为7.12%。防水剂的加入除能明显提高纸模制品的湿环压强度外还能改善其染色效果,添加量为5%(对绝干浆质量)时,纸模可达到较好的湿环压强度,上染率可提高到79.30%,褪色率降低为0.31%。

Properties of chitosan-treated fibre dyeing with edible stain

In order to prepare the colorful and waterproof paper for food package,the chitosan-treated pulp was dyed with edible stains and waterproof agent H was added to increase the effect of waterproof and dyeing.The results showed that better dyeing condition was temperature 60 ℃,stain 0.6%(of dry pulp quality),pH 3.5.The dyeing rate at room temperature is 71.43% and the fade rate is 7.12%.The waterproof agent can improve the wet intensity and the dyeing effect of paper,in which the dying rate is increased to 79.30%,and the fade rate is reduced to 0.31% when 5% agent H(of dry pulp quality) is added.