Short linen viscose fiber and preparation method thereof
A technology of viscose staple fiber and hemp material, which is applied to artificial filaments made of viscose, pretreatment with acidic compounds, pulp bleaching, etc., which can solve the problems of high cooking intensity, large material consumption, and long time, and achieve Solve the cumbersome cooking process, solve the effect of high cooking intensity and short production cycle
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Embodiment 1
[0036] A preparation method of hemp viscose staple fiber, including: after hemp material is prepared, pretreatment, water washing, steaming, washing, pulping, sand removal, concentration, alkali refining, bleaching, acid treatment, washing, and post selection Desanding, concentration, papermaking, dipping, squeezing, crushing, aging, yellowing, grinding, dissolving, filtering, deaeration, filtering, spinning, drawing, cutting, post-processing, drying, and packaging to obtain the finished product, the specific process as follows:
[0037] (1) Pretreatment: After cutting and washing the hemp, sulfuric acid is added to the pretreatment tower to adjust the pH value to 2, the amount of ozone added is 3% of the relative dry raw material quality, the treatment time is 10min, the pressure is 0.5MPa, and the temperature is 40°C.
[0038] (2) Washing with water: the temperature is 50°C, and the mass of the slurry after washing: total cellulose mass percentage 81.2%, lignin mass percentage 1...
Embodiment 2
[0058] A preparation method of hemp viscose staple fiber, including: after hemp material is prepared, pretreatment, water washing, cooking, washing, pulping, sand removal, concentration, alkali refining, bleaching, acid treatment, washing, and post-selection Finished products are prepared by de-sanding, concentration, papermaking, dipping, pressing, crushing, aging, yellowing, grinding, dissolving, filtering, defoaming, filtering, spinning, drawing, cutting, post-processing, drying and packaging.
[0059] (1) Pretreatment: After cutting and washing the hemp, sulfuric acid is added to the pretreatment tower to adjust the pH value to 3, the amount of ozone added is 1% of the relative dry raw material quality, the treatment time is 20min, the pressure is 0.8MPa, and the temperature is 50°C.
[0060] (2) Washing with water: the temperature is 60℃, the quality of the slurry after washing: the mass percentage of total cellulose 82.2%, lignin mass percentage 1.9%, pectin mass percentage 0...
Embodiment 3
[0080] A preparation method of hemp viscose staple fiber, including: after hemp material is prepared, pretreatment, water washing, cooking, washing, pulping, sand removal, concentration, alkali refining, bleaching, acid treatment, washing, and post-selection Finished products are prepared by de-sanding, concentration, papermaking, dipping, pressing, crushing, aging, yellowing, grinding, dissolving, filtering, defoaming, filtering, spinning, drawing, cutting, post-processing, drying and packaging.
[0081] (1) Pretreatment: After cutting the hemp material and washing with water, add sulfuric acid to the pretreatment tower to adjust the pH value to 2, the ozone addition amount is 2% of the relative absolute dry raw material quality, the treatment time is 15min, the pressure is 0.7MPa, and the temperature is 45°C.
[0082] (2) Washing with water: the temperature is 55℃, the quality of the slurry after washing: the mass percentage of total cellulose 81.2%, lignin mass percentage 1.8%, ...
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