The negative ions fiber is which can generate negative ions in certain physical stimulation.In this paper

the dyeing performance of nylon 6 negative ions fiber and nylon 6 fiber was compared by orthogonal experiment. The results find that nylon 6 negative ions fiber have a lower amount of dye than nylon 6 fiber

and the bath’s pH has greater impact on nylon 6 negative fiber. This thesis also study dyeing properties of nylon 6 neigative fiber and discussed the influence of dyeing on nylon 6 fiber anion properties

and found that at pH=4.0

the density of dye liquor is 0.6g/L

bath ratio is 1:50

holding temperature is 95℃

the holding time is 45 min the are the optimum conditions for nylon 6 negative fiber dyeing. And dyeing has a little impact on nylon 6 anion properties.