Health type viscose fiber with high wet modulus and its production process and use
A technology of high wet modulus viscose and a manufacturing method, which is applied in the directions of rayon made of viscose, wet spinning, etc., can solve problems such as limiting application performance, and achieve the effects of full hand feeling and simple manufacturing method.
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Embodiment 1
[0020] Add 0.3 parts of chitin and 6 parts of 45% NaOH aqueous solution into the container for alkalization for 2 hours at a temperature of 20°C. The resulting alkali chitin is pressed to 4 times its dry weight. After crushing, put it into the yellowing machine for yellowing. Add 4 parts of crushed ice, add CS after vacuuming in the yellowing machine 2 0.2 parts, yellowing time 100 minutes, temperature -20°C. After the yellowing was completed, 4 parts of water were added for dissolving for 3 hours at a dissolving temperature of 10° C., and the prepared chitin xanthate solution was left standing for use.
[0021] Take another 6 parts of cotton pulp (DP=900) and 120 parts of NaOH aqueous solution with a concentration of 20%, put them into a container for alkalization for 1 hour at a temperature of 20°C, and squeeze the resulting alkali cellulose to 3 times the dry weight , aged at 20°C for 16 hours after pulverization, and then yellowed in a yellowing machine for 60 minutes a...
Embodiment 2
[0025] Soak 2-9kg of cellulose and 0.02-2kg of chitin in a 10-50% sodium hydroxide solution at -10-95°C for 10-300 minutes, with a bath ratio of 1:15-25, and squeeze it to dry weight. 2.5-5 times, crushed and aged at 10-40°C for 8-30 hours. Then vacuum, add 20-90% (for raw materials) CS 2 , After 1-4 hours of yellowing at 5-25 ° C, the ratio of the yellowing bath should depend on the method and raw materials used. Add appropriate amount of lye and soft water or crushed ice to dissolve, and obtain a spinning stock solution with a high polymer content of 4-10%. The blending of the two polymers can be carried out during yellowing and dissolution; it can also be made into solutions separately, and then the solution blending is carried out. Then the blended high wet modulus viscose fiber is produced by wet spinning method.
[0026] Put the spinning raw fluid into the coagulation bath, the spinning pressure is 0.2-0.6Mpa, the content of sulfuric acid in the coagulation bath is 28...
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