Seawater retting and low alkali combined degum method for hemp
A degumming method and seawater technology, applied in textiles and papermaking, fiber processing, plant raw materials, etc., can solve the problems of wasting freshwater resources and polluting the environment by single chemical degumming, reducing freshwater application, pollution and emissions, and good quality. Effect
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Embodiment 1
[0022] 1) wash the hemp fiber with seawater to remove impurities;
[0023] 2) Put the washed marijuana into a (200L) container, add 19 times of seawater, control the temperature at 30°C, place it for 5 days, take it out, and wash it with water;
[0024] 3) The hemp after seawater retting is subjected to normal temperature and pressure simmering and degumming, and the simmering formula mass percentage is: sodium hydroxide is 5%, sodium silicate 1%, sodium tripolyphosphate 2%; bath ratio (marijuana and The ratio of the volume of seawater solution) is 1:10, heat to 100°C, boil for 1 hour, take it out and wash it with water;
[0025] 4) The normal temperature and pressure treated cannabis was bleached with hydrogen peroxide, the concentration of hydrogen peroxide was 7g / L, the liquor ratio was 1:10, the pH was 11, and the temperature was 85°C for 45 minutes;
[0026] 5) Shaking the hemp using a hemp shaking machine to loosen the block of hemp;
[0027] 6) softening and treating ...
Embodiment 2
[0030] 1) wash the hemp fiber with seawater to remove impurities;
[0031] 2) Put the washed marijuana into a (200L) container, add 20 times of seawater, control the temperature at 35°C, place it for 4 days, take it out, and wash it with water;
[0032] 3) The hemp after seawater retting is subjected to normal temperature and pressure cooking and degumming. The mass percentage of the cooking formula is: 7% sodium hydroxide, 2% sodium silicate, and 3% sodium tripolyphosphate; the liquor ratio is 1: 15. Heat to 95°C, cook for 2 hours, take out and wash with water;
[0033] 4) The normal temperature and pressure treated cannabis was bleached with hydrogen peroxide, the concentration of hydrogen peroxide was 10g / L, the liquor ratio was 1:15, the pH was 10, and the temperature was 70°C for 40 minutes;
[0034] 5) Shaking the hemp using a hemp shaking machine to loosen the block of hemp;
[0035] 6) softening hemp with a softener (SJ-501 softener for hemp purchased from Zhejiang A...
Embodiment 3
[0038] 1) wash the hemp fiber with seawater to remove impurities;
[0039] 2) Put the washed marijuana into a (200L) container, add 18 times of seawater, control the temperature at 32°C, place it for 4.5 days, take it out, and wash it with water;
[0040] 3) The hemp after seawater retting is then subjected to normal temperature and pressure cooking and degumming. The mass percentage of the cooking formula is: 6% sodium hydroxide, 1.5% sodium silicate, and 2.5% sodium tripolyphosphate; the liquor ratio is 1: 13. Heat to 90°C, cook for 1.5 hours, take out and wash with water;
[0041] 4) Bleaching the cannabis treated at normal temperature and pressure with hydrogen peroxide, the concentration of hydrogen peroxide is 9g / L, the bath ratio is 1:12, the pH is 10.5, and the temperature is 80°C for 30 minutes;
[0042] 5) Shaking the hemp using a hemp shaking machine to loosen the block of hemp;
[0043] 6) softening and treating hemp with a softener (SJ-501 hemp softener purchase...
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