High-efficiency and shortened process for production of colored linen roving

This article discussed the high-efficiency and shortened process for scouring/bleaching/dyeing of linen roving,and the quality of the semi-product after scouring and bleaching was tested and the effect of dyeing and the spinnability of the dyed roving were investigated.The results indicated the color fastness and color index of the dyed roving by this process were similar to those by the traditional process;the short fiber content(lower than 50 mm) was 34.0%,which was lower as compared with the traditional process(35.4%);the average length of fiber is 77.4 mm,increased by 11.3 mm as compared with the traditional process;and the fiber length and regularity were good for subsequent spinning.As compared with the traditional process,this new process omitted such steps as drying,packing,rewinding before dyeing in the mill and pretreatment before dyeing,the transportation from the mill to the dye-house,handling,etc.and thereby improved the productivity,reduced water and energy consumption and waste water treatment load.