Manufacturing method for bamboo cellulose fibre by solvent method
A technology of cellulose fibers and manufacturing methods, applied to artificial filaments made of viscose, wet spinning, etc., can solve problems such as broken ends, inability to spin, solubility, defoaming and spinnability decline, etc. , to achieve the effect of low cost, short production process and good spinnability
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Embodiment 1
[0019] Embodiment 1: after the bamboo pulp that DP is 500 is cut into the small piece of 4cm * 4cm with common pulp cutter, under decompression state (decompression to-7 * 10 4 Pa) and 50 DEG C under equilibrium for 8 hours, the moisture content of the obtained pulp flakes reaches 4%;
[0020] 198.3kg of NMMO aqueous solution (the weight ratio of NMMO and water is 1) was evaporated to 134kg under reduced pressure, so that its water content was 26% (that is, the concentration of NMMO was 74%);
[0021] 10.25 kg of the above-mentioned pulp chips and 134 kg of 74% NMMO aqueous solution were mixed in a 300-liter polymerization kettle, and the temperature of the kettle was 80° C. To prevent oxidation, 124 g of propyl citrate was added simultaneously. After dipping and swelling for 20 minutes, turn on the agitator and control its speed to 110r / min, and at the same time turn on the vacuum system to maintain the vacuum degree at -9×10 4 Pa, and gradually increase the temperature to ...
Embodiment 2
[0023]Embodiment 2: after the bamboo pulp that DP is 500 is cut into the small piece of 4cm * 4cm with common pulp cutter, under decompression state (decompression to-7 * 10 4 Pa) and 50 DEG C under equilibrium for 8 hours, the moisture content of the obtained pulp flakes reaches 4%;
[0024] 2800g of NMMO aqueous solution (the weight ratio of NMMO and water is 1) was evaporated to 1892g under reduced pressure, so that its water content was 26% (that is, the concentration of NMMO was 74%);
[0025] 160.8g of the above-mentioned pulp flakes and 1892g of 74% NMMO aqueous solution were placed in a 5 liter dissolving kettle and mixed, and the temperature of the kettle was 80°C. To prevent oxidation, 1.6 g of propyl citrate was added at the same time. After dipping and swelling for 20 minutes, turn on the agitator and control its speed to 100r / min, and at the same time turn on the vacuum system to maintain the vacuum degree at -9.6×10 4 Pa, and gradually increase the temperature ...
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