The invention discloses a
copper ion fiber prepared by a two-
step method. The
copper ion fiber is prepared by comprising the steps: for the first work procedure, immersing
polyacrylonitrile fibers by a first conditioning fluid at the temperature being 35-75 DEG C, taking out the immersed
polyacrylonitrile fibers after 0.5h, wherein the first conditioning fluid comprises cupric
thiosulfate,
sodium thiosulfate and
sodium citrate according to the weight ratio of 1 to (0.05-0.25) to (0.06-0.09), and the
centration of
copper sulfate is 0.5-1.5wt%; and for the second work procedure, immersing the fibers processed by the first work procedure by using a second conditioning fluid, then carrying out heat treatment under the air
stream with the temperature being 110 EDG C-230 DEG C, wherein the second conditioning fluid comprises basic dyestuff and an
antibacterial agent according to the weight ratio of 1 to (0.7-1.2), and the concentration of the basic dyestuff is 0.05-0.15wt%. The invention discloses the copper
ion fiber prepared by the preparation method and also discloses
socks prepared from the copper ion fiber, mint fiber and bamboo fiber. Compared with the prior art, the copper ion fiber and the
socks prepared by the invention have good anti-bacterial capability, and can be used for preventing undesirable
odor, and people feel cool when wearing the
socks.