Degumming and bleaching process of natural bamboo fiber
A bamboo fiber and degumming technology, which is applied in the direction of producing bast fibers by chemical method, can solve problems such as difficulty in degumming, and achieve the effect of good effect and simple steps.
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Embodiment 1
[0028] A kind of degumming and bleaching process of bamboo raw fiber, comprises the steps:
[0029] In the first step, the bamboo is first cut off from the bamboo joints and cut into bamboo slices, and then it is cooked. The temperature of the cooking is 120°C, the pressure is 0.3Mpa, and the cooking time is 4 hours; the cooking liquid used for cooking contains 5wt% The sodium hydroxide of 1wt% and the sodium thiosulfate of 1wt%, bamboo chip is crushed into filament after finishing, crushing is to adopt the roller crushing of 20 times of bamboo chip weight, wash;
[0030] In the second step, the filament obtained in the first step is put into a solution containing 1wt% biological enzyme for degumming. Before degumming, the pH of the solution needs to be adjusted to 4. : 2 components, degumming is carried out at a certain acidity and a certain temperature, the degumming time is 0.5h, the degumming temperature is 50°C, and then washed with water to obtain the cellulose fiber in ...
Embodiment 2
[0035] A kind of degumming and bleaching process of bamboo raw fiber, comprises the steps:
[0036] In the first step, the bamboo is first cut off from the bamboo joints and cut into bamboo slices, and then it is cooked. The temperature of the cooking is 140°C, the pressure is 0.5Mpa, and the cooking time is 7 hours; the cooking liquid used for cooking contains 5wt% The sodium hydroxide of 1wt% and the sodium thiosulfate of 1wt%, bamboo chip is crushed into filament after finishing, crushing is to adopt the roller crushing of 30 times of bamboo chip weight, wash;
[0037] In the second step, the filament obtained in the first step is put into a solution containing 5wt% biological enzyme for degumming. Before degumming, the pH of the solution needs to be adjusted to 5. : 4 components, degumming is carried out at a certain acidity and a certain temperature, the degumming time is 2 hours, the degumming temperature is 90°C, and then washed with water to obtain cellulose fibers in ...
Embodiment 3
[0042] A kind of degumming and bleaching process of bamboo raw fiber, comprises the steps:
[0043] In the first step, the bamboo is first cut off from the bamboo joints and cut into bamboo slices, and then it is cooked. The temperature of the cooking is 130°C, the pressure is 0.4Mpa, and the cooking time is 5 hours; the cooking liquid used for cooking contains 5wt% The sodium hydroxide of 1wt% and the sodium thiosulfate of 1wt%, bamboo chip is crushed into filament after finishing, crushing is to adopt the roller crushing of 30 times of bamboo chip weight, wash;
[0044]In the second step, the filament obtained in the first step is put into a solution containing 3wt% biological enzyme for degumming. Before degumming, the pH of the solution needs to be adjusted to 4-5. The composition ratio is 1:3, degumming is carried out at a certain acidity and temperature, the degumming time is 1h, the degumming temperature is 70°C, and then washed with water to obtain cellulose fibers in ...
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