Preparation and properties of negative ion functional cotton knitted fabric

In order to develop negative ion functional cotton knitting products with good performance, tourmaline powder was selected as the anion additive, and the anion functional finishing of cotton knitting products was carried out by the two-dip and two-rolling process. The microstructures of tourmaline powder and anion functional cotton fabric were observed, their anion emissions were measured, and the influences of particle size and amount of anion additive on the finishing effect were discussed. The results showed that, after grinding, the particle size of tourmaline powder decreased to different degrees and its distribution was more uniform. The negative ion emission of tourmaline powder was enhanced compared with that before grinding. The properties of cotton knitted fabric treated with ground negative ion additive were better than those treated with non-ground one. The contents of negative ion additive and modification temperature both have great influence on the amount of anion emission of finished cotton fabric. The anion functional cotton fabric had certain washing durability and needs to be improve.