Low-temperature oxygen-bleaching technology for flax

Abstract

The invention relates to a low-temperature oxygen-bleaching technology for flax, and the technology is applicable to degumming bleaching operation of flax rovings. The technology specifically comprises the steps: (1) treating with acid, discharging fluid; (2) blenching with sodium chlorite, discharging fluid; (3) cleaning with water; (4) treating with enzyme: employing a desizing enzyme TF-165 and a strong detergent TF-126A, treating at 50 DEG C for 15 minutes without fluid discharging; (5) blenching with hydrogen peroxide: under the condition of no fluid discharging, adding additives comprising an oxygen-blenching stabilizer E-VP, a cold-blenching refiner TF-189L and hydrogen peroxide with a concentration of 27.5%, to obtain a mixed solution, adjusting pH value of the mixed solution with sodium hydroxide to be 9.5-10.5, treating at 70 DEG C for 40-60 minutes, discharging fluid; and (6) cleaning with water. The technology is low in oxygen-blenching temperature and small in fiber damage, low in fiber loss rate and high in producing rate; the prepared yarn is improved in flexibility and can be used to knit; and by employing low-temperature blenching, energy is saved.

Description

technical field [0001] The invention relates to a flax low-temperature oxygen bleaching process, which is suitable for the flax roving degumming and bleaching process, and belongs to the technical field of flax treatment. Background technique [0002] Flax fiber is a pure natural fiber with strong hygroscopicity, good heat dissipation and air permeability, anti-mildew and anti-moth, no static electricity, no chemical components, and unique characteristics of inhibiting bacterial growth and effectively blocking ultraviolet penetration. However, because the flax fiber exists in the form of bundles of fibers, although there are still a large amount of non-cellulose components such as pectin and lignin after the previous carding, which affects the spinning efficiency, the fibers need to be degummed before spinning. Treatment to increase fiber splitting, clean fibers, and enable smooth spinning of yarns. [0003] In the prior art, the traditional degumming process is to treat fl...

AI Technical Summary

Problems solved by technology

Due to the high temperature and long time of oxygen bleaching, it will cause great damage to the fiber. At the same time, due to the high temperature, too much wax in the hemp fiber will be removed, which will cause the fiber to feel hard, which not only consumes time and electricity, but also causes an increase in production costs.

[0004] Chinese Patent No. 201110273595 discloses a patent titled "Flax Short Fiber Degumming and Bleaching Process". This patent also includes two process steps of pickling and sub-bleaching before the washing step of the general process, and the degumming and bleaching effect is good; however, this The temperature of the patented oxygen bleaching step needs to be 85°C-95°C, and soak for 45-55 minutes. The high temperature and long time will cause great damage to the fiber, and the above-mentioned defects in the prior art have not been overcome.

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