A kind of preparation method of offset paper
A technology of offset paper and pulp, which is applied in the field of offset paper preparation, can solve the problems of filler retention rate and low ash content, low paper strength, uneven thickness, etc., and achieve the effect of improving filler retention rate
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Embodiment 1
[0048] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 40°SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.5%; stir ; add filler 1% aluminum sulfate, 10% calcium carbonate, 2% titanium dioxide, magnetic stirring; retention aid polyacrylamide, bentonite, high polymer, use, first add polyacrylamide relative to the weight of the slurry, the weight The ratio is 3%, then add 0.4% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 30%: 40%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dryness is ≥39%, it en...
Embodiment 2
[0050] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 38°SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.3%; stir ; add filler 4% aluminum sulfate, 10% calcium carbonate, 2% titanium dioxide successively, magnetically stir; retention aid polyacrylamide, bentonite, high polymer are used together, relative to the weight of slurry, first add polyacrylamide, weight The ratio is 8%, then add 0.5% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 40%: 30%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dry...
Embodiment 3
[0052] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 29 ° SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.5%; stir ; add filler 5% aluminum sulfate, 10% calcium carbonate, 1% titanium dioxide, magnetic stirring; retention aid polyacrylamide, bentonite, high polymer used together, relative to the weight of the slurry, first add polyacrylamide, weight The ratio is 3%, then add 0.2% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 30%: 40%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dryness is ≥49...
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