The invention provides
dyeing-free chinlon 66 industrial color silk and a preparation method thereof. The preparation method particularly comprises the following steps: 1, conveying a chinlon 66 sliceto a
drying tower to dry; 2, performing humidifying treatment on the dried chinlon 66 slice and feeding into a pre-
spinning cabin; 3, mixing master batches and high-
viscosity chinlon 66 slice in thepre-
spinning cabin into a mixed material, and performing
melt extrusion on the mixed material by a screw
extrusion machine; 4, enabling the equivalently distributed melt to enter a
spinning box body and jetting silk; 5, cooling the melt fine flow jetted by a spinneret plate to form tows; and 6, after cooling, performing oiling, drafting and hot setting as well as networking and winding on the towsto obtain the
dyeing-free chinlon 66 industrial color silk. By the method, original liquid
dyeing spinning of the chinlon 66 is realized, the process
route does not need dyeing and environmental
pollution caused by chinlon 66 dyeing is avoided; and in the dyeing-free chinlon 66 industrial color silk, the
thermal shrinkage rate is 4 to 7 percent, the denier number is 150 to 1260 D, the
breaking strength is more than or equal to 8.0 g / D and the elongation at break is 17 to 21 percent.