Preparing method of table salt packaging paper
A manufacturing method, technology of wrapping paper, applied in the direction of paper, papermaking, paper coating, etc.
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Embodiment 1
[0018] After the bleached softwood kraft pulp is crushed in a hydraulic pulper, it is beaten by three double-disc mills in series with a beating concentration of 4.5%. After beating, the beating degree of bleached softwood kraft pulp is 59. o SR, wet weight 7.5 g, enters the pulp pond after softwood knock. At the same time, the bleached kraft hardwood pulp is crushed in another hydraulic pulper, and then beaten by two double-disc mills in series, with a beating concentration of 4.5%. After beating, the bleached kraft hardwood pulp has a beating degree of 33 o SR, wet weight 2.5 g, enters the pulp pond after the hardwood knock. Through the pulping system, automatic pulping is carried out according to the mass ratio of softwood pulp: hardwood pulp of 55:45. After the pulp is mixed evenly, it enters the slurry flow system. Dilute to 2.5% and enter the grit ditch with magnetite to remove metal impurities in the slurry system; the slurry is diluted by the slurry pump and then enters ...
Embodiment 2
[0020] After the bleached softwood kraft pulp is crushed in a hydraulic pulper, it is beaten by three double-disc mills in series with a beating concentration of 4.5%. After beating, the beating degree of bleached softwood kraft pulp is 60. o SR, wet weight 7.3 g, enters the pulp pond after conifer knock. At the same time, the bleached kraft hardwood pulp is crushed in another hydraulic pulper, and then be beaten by two double-disc mills in series with a beating concentration of 4.5%. After beating, the bleached kraft hardwood pulp has a beating degree of 34 o SR, wet weight 2.4 g, enters the pulp pond after the hardwood knock. Through the pulping system, automatic pulping is carried out according to the mass ratio of softwood pulp: hardwood pulp of 55:45. After the pulp is mixed evenly, it enters the slurry flow system. Dilute to 2.5% and enter the grit ditch with magnetite to remove metal impurities in the slurry system; the slurry is diluted by the slurry pump and then enters...
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