High-permeability ultra-black facing base paper
A high-permeability, decorative technology, applied in special paper, paper, papermaking, etc., can solve the problems of poor batch stability of printing performance, white dust on the surface of black paper, gray color and insufficient blackness, etc., and achieve low cost , Printing color is bright, the effect of improving the retention rate
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Embodiment 1
[0037] (1) Bleached coniferous pulp and bleached hardwood pulp are added to a pulper equipped with 40°C pulping water at a mass ratio of 1:4 to fully crush them, and when the water temperature drops to 28°C while pulping, add pulp Black pigment (DiresulBlackRDT-KAS.CNLiq) with 25% mass of raw material; reduce the degree of percussion of bleached wood pulp to 32°SR, and pump it into the pulping tank after the mass concentration reaches 4%.
[0038] (2) Dilute the kaolin, which accounts for 15% of the mass of the slurry, to a mass concentration of 70%, fully stir it with a high-speed agitator, and then put it into the above-mentioned crushing tank. After mixing and stirring evenly, adjust the pH value of the slurry in the pulping tank to 9.
[0039] (3) Pump the slurry in the crushing tank into the filling tank, adjust the pH value of the slurry in the filling tank to 7, add a colorant accounting for 1.5‰ of the slurry mass into the slurry, stir well and then add 120‰ of the slur...
Embodiment 2
[0046] (1) Bleached coniferous pulp and bleached hardwood pulp are added to a pulper equipped with clear water for pulping at 40°C at a mass ratio of 1:4.2 and fully crushed. At the same time as pulping, add pulp when the water temperature drops to 27°C The black pigment of 26% of material quality; after reducing the percussion degree of bleached wood pulp to 32 ° SR, and the mass concentration reaches 4%, it is pumped into the pulping tank for standby.
[0047] (2) Dilute the kaolin which accounts for 13% of the mass of the slurry to a mass concentration of 68%, fully stir it with a high-speed agitator, and then put it into the above-mentioned crushing tank, and adjust the pH value of the slurry in the pulping tank to 9 after mixing and stirring evenly .
[0048] (3) Pump the slurry in the crushing tank into the filling tank, adjust the pH value of the slurry in the filling tank to 7, add a colorant accounting for 1~2‰ of the slurry mass into the slurry, stir well and then ad...
Embodiment 3
[0055] (1) Bleached coniferous pulp and bleached broad-leaved pulp are added to a pulper equipped with clear water for pulping at 42°C at a mass ratio of 1:3.8 and fully crushed. At the same time as pulping, add pulp when the water temperature drops to 28°C Black pigment with 30% mass of raw material; reduce the degree of percussion of bleached wood pulp to 32°SR, and pump it into the pulping tank after the mass concentration reaches 4%.
[0056] (2) Dilute kaolin, which accounts for 17% of the mass of the slurry, to a mass concentration of 71%, fully stir it with a high-speed agitator, and then put it into the above-mentioned crushing tank, and adjust the pH value in the pulping tank to 9 after mixing and stirring evenly.
[0057] (3) Pump the slurry in the crushing tank into the filling tank, adjust the pH value in the filling tank to 7, add a coloring agent accounting for 1.8‰ of the slurry quality into the slurry, stir evenly, and then add 125‰ of the slurry quality. Stren...
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