A kind of green environmental protection type anti-myopia workbook paper preparation process
A green and environmentally friendly preparation technology, applied in the direction of paper, special paper, non-woody plant/crop pulp, etc., can solve problems such as damage to students' vision and health, achieve easy disposal and recycling, reduce drying time, waste gas little effect
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[0026] A kind of green environment-friendly anti-myopia homework paper preparation process, comprises the following steps:
[0027] (1) Grind the wheat straw so that the fiber length is 19 cm; add sodium sulfite, sodium hydroxide and anthraquinone to the wheat straw fiber, and mix thoroughly, the addition amount accounts for the weight percentage of wheat straw: sodium sulfite 5%, sodium hydroxide 3 %, anthraquinone 0.02%;
[0028] (2) Cook the mixture in water to form a pulp slurry, the concentration of the slurry is 4-5%, the cooking temperature is 180°C, and the cooking time is 2 hours, and the cooked slurry is sieved to remove coarse impurities;
[0029] (3) Add sodium hydroxide to the cooked slurry, heat it to 50°C, and keep it for 6 hours. The amount of sodium hydroxide added is 4% by weight of the slurry;
[0030] (4) According to the paper thickness requirements, spread the pulp on the 80-mesh forming wire to form a wet paper web, and heat it at 55°C until the water c...
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