RU2246566C2 - Способ изготовления бумаги и картона - Google Patents
Способ изготовления бумаги и картона Download PDFInfo
- Publication number
- RU2246566C2 RU2246566C2 RU2002113758/04A RU2002113758A RU2246566C2 RU 2246566 C2 RU2246566 C2 RU 2246566C2 RU 2002113758/04 A RU2002113758/04 A RU 2002113758/04A RU 2002113758 A RU2002113758 A RU 2002113758A RU 2246566 C2 RU2246566 C2 RU 2246566C2
- Authority
- RU
- Russia
- Prior art keywords
- water
- polymer
- soluble
- cationic
- polyaluminosilicates
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000011087 paperboard Substances 0.000 title claims abstract description 12
- 239000011111 cardboard Substances 0.000 title claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000000725 suspension Substances 0.000 claims abstract description 77
- 229920000642 polymer Polymers 0.000 claims abstract description 68
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 64
- 238000005189 flocculation Methods 0.000 claims abstract description 56
- 125000000129 anionic group Chemical group 0.000 claims abstract description 52
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 45
- 239000010703 silicon Substances 0.000 claims abstract description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000123 paper Substances 0.000 claims abstract description 27
- 230000016615 flocculation Effects 0.000 claims abstract description 23
- 229920001059 synthetic polymer Polymers 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000178 monomer Substances 0.000 claims description 115
- 125000002091 cationic group Chemical group 0.000 claims description 83
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 52
- 239000000945 filler Substances 0.000 claims description 32
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 31
- 239000000440 bentonite Substances 0.000 claims description 30
- 229910000278 bentonite Inorganic materials 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 26
- 239000000377 silicon dioxide Substances 0.000 claims description 23
- 229920006318 anionic polymer Polymers 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 229920006317 cationic polymer Polymers 0.000 claims description 19
- 235000012239 silicon dioxide Nutrition 0.000 claims description 14
- -1 smectites Inorganic materials 0.000 claims description 13
- 239000004927 clay Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 230000008961 swelling Effects 0.000 claims description 8
- 239000008119 colloidal silica Substances 0.000 claims description 6
- 239000011859 microparticle Substances 0.000 claims description 6
- 239000000499 gel Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 230000003311 flocculating effect Effects 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 claims description 3
- 229910000271 hectorite Inorganic materials 0.000 claims description 3
- 239000005556 hormone Substances 0.000 claims description 3
- 229940088597 hormone Drugs 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 3
- 229910000275 saponite Inorganic materials 0.000 claims description 3
- 235000019355 sepiolite Nutrition 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000013055 pulp slurry Substances 0.000 claims 1
- 239000010457 zeolite Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 9
- 150000004676 glycans Chemical class 0.000 abstract description 6
- 229920001282 polysaccharide Polymers 0.000 abstract description 6
- 239000005017 polysaccharide Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 3
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 235000012216 bentonite Nutrition 0.000 description 32
- 229940092782 bentonite Drugs 0.000 description 29
- 238000006116 polymerization reaction Methods 0.000 description 20
- 230000014759 maintenance of location Effects 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 12
- 239000006085 branching agent Substances 0.000 description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 10
- 239000000701 coagulant Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 6
- 229920000831 ionic polymer Polymers 0.000 description 6
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 239000008107 starch Substances 0.000 description 6
- 235000019698 starch Nutrition 0.000 description 6
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 5
- NEHMKBQYUWJMIP-UHFFFAOYSA-N anhydrous methyl chloride Natural products ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 229920005615 natural polymer Polymers 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- 125000004103 aminoalkyl group Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical class CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 3
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 3
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 description 3
- 150000003926 acrylamides Chemical class 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 229940037003 alum Drugs 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 229940050176 methyl chloride Drugs 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000620 organic polymer Polymers 0.000 description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 125000004985 dialkyl amino alkyl group Chemical group 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000006194 liquid suspension Substances 0.000 description 2
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 150000003460 sulfonic acids Chemical class 0.000 description 2
- 238000010557 suspension polymerization reaction Methods 0.000 description 2
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- MGQIWUQTCOJGJU-UHFFFAOYSA-N [AlH3].Cl Chemical compound [AlH3].Cl MGQIWUQTCOJGJU-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- YZVITDHJYAEQKX-UHFFFAOYSA-K aluminum;trichloride;trihydrate Chemical compound O.O.O.[Al+3].[Cl-].[Cl-].[Cl-] YZVITDHJYAEQKX-UHFFFAOYSA-K 0.000 description 1
- 125000000539 amino acid group Chemical group 0.000 description 1
- 229920006320 anionic starch Polymers 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 230000005591 charge neutralization Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- BULLHNJGPPOUOX-UHFFFAOYSA-N chloroacetone Chemical compound CC(=O)CCl BULLHNJGPPOUOX-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-M crotonate Chemical class C\C=C\C([O-])=O LDHQCZJRKDOVOX-NSCUHMNNSA-M 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- LVYZJEPLMYTTGH-UHFFFAOYSA-H dialuminum chloride pentahydroxide dihydrate Chemical compound [Cl-].[Al+3].[OH-].[OH-].[Al+3].[OH-].[OH-].[OH-].O.O LVYZJEPLMYTTGH-UHFFFAOYSA-H 0.000 description 1
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- RCLLINSDAJVOHP-UHFFFAOYSA-N n-ethyl-n',n'-dimethylprop-2-enehydrazide Chemical compound CCN(N(C)C)C(=O)C=C RCLLINSDAJVOHP-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920000867 polyelectrolyte Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
- D21H17/43—Carboxyl groups or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
- D21H23/06—Controlling the addition
- D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
- D21H23/765—Addition of all compounds to the pulp
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16423299P | 1999-11-08 | 1999-11-08 | |
| US60/164,232 | 1999-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2002113758A RU2002113758A (ru) | 2004-08-20 |
| RU2246566C2 true RU2246566C2 (ru) | 2005-02-20 |
Family
ID=22593561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2002113758/04A RU2246566C2 (ru) | 1999-11-08 | 2000-11-02 | Способ изготовления бумаги и картона |
Country Status (25)
| Country | Link |
|---|---|
| US (2) | US6454902B1 (enExample) |
| EP (1) | EP1238161B1 (enExample) |
| JP (1) | JP3689042B2 (enExample) |
| KR (1) | KR100587731B1 (enExample) |
| CN (1) | CN1270026C (enExample) |
| AR (1) | AR026375A1 (enExample) |
| AT (1) | ATE257195T1 (enExample) |
| BR (2) | BR0015376B1 (enExample) |
| CA (1) | CA2389393C (enExample) |
| CZ (1) | CZ296851B6 (enExample) |
| DE (1) | DE60007556T2 (enExample) |
| DK (1) | DK1238161T3 (enExample) |
| ES (1) | ES2210016T3 (enExample) |
| HU (1) | HU225698B1 (enExample) |
| MX (1) | MXPA02004496A (enExample) |
| MY (1) | MY122329A (enExample) |
| NO (1) | NO332240B1 (enExample) |
| NZ (1) | NZ518468A (enExample) |
| PL (1) | PL205729B1 (enExample) |
| PT (1) | PT1238161E (enExample) |
| RU (1) | RU2246566C2 (enExample) |
| SK (1) | SK286454B6 (enExample) |
| TW (1) | TW483970B (enExample) |
| WO (1) | WO2001034910A1 (enExample) |
| ZA (1) | ZA200203516B (enExample) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2345188C1 (ru) * | 2007-09-06 | 2009-01-27 | ООО "Оптимальные Химические Технологии+консалтинг" | Способ изготовления мешочной бумаги и мешочная бумага |
| RU2388863C2 (ru) * | 2005-05-11 | 2010-05-10 | Стора Энсо Аб | Способ получения бумаги и бумага, полученная данным способом |
| RU2431709C2 (ru) * | 2007-02-05 | 2011-10-20 | Басф Се | Производство бумаги с наполнителем |
| RU2431710C2 (ru) * | 2007-02-05 | 2011-10-20 | Басф Се | Производство бумаги или картона |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7189776B2 (en) * | 2001-06-12 | 2007-03-13 | Akzo Nobel N.V. | Aqueous composition |
| DE20220979U1 (de) | 2002-08-07 | 2004-10-14 | Basf Ag | Papierprodukt |
| US7244339B2 (en) * | 2003-05-05 | 2007-07-17 | Vergara Lopez German | Retention and drainage system for the manufacturing of paper |
| MXPA04003942A (es) * | 2003-05-05 | 2007-06-29 | German Vergara Lopez | Un sistema de retencion y drenaje recomendado para la fabricacion de papel, cartulina, carton y otros productos similares. |
| US7482310B1 (en) | 2003-11-12 | 2009-01-27 | Kroff Chemical Company, Inc. | Method of fracturing subterranean formations utilizing emulsions comprising acrylamide copolymers |
| US7531600B1 (en) | 2003-11-12 | 2009-05-12 | Kroff Chemical Company | Water-in-oil polymer emulsion containing microparticles |
| JP4894264B2 (ja) * | 2004-01-20 | 2012-03-14 | 東亞合成株式会社 | 両性水溶性高分子を含む組成物 |
| US7799169B2 (en) | 2004-09-01 | 2010-09-21 | Georgia-Pacific Consumer Products Lp | Multi-ply paper product with moisture strike through resistance and method of making the same |
| DE102004044379B4 (de) | 2004-09-10 | 2008-01-10 | Basf Ag | Verfahren zur Herstellung von Papier, Pappe und Karton und Verwendung einer Retentionsmittelkombination |
| US8491753B2 (en) * | 2004-10-15 | 2013-07-23 | Nalco Company | Composition and method for improving retention and drainage in papermaking processes by activating microparticles with a promoter-flocculant system |
| US7955473B2 (en) | 2004-12-22 | 2011-06-07 | Akzo Nobel N.V. | Process for the production of paper |
| KR101041508B1 (ko) * | 2004-12-22 | 2011-06-16 | 아크조 노벨 엔.브이. | 종이의 제조방법 |
| DE102004063005A1 (de) | 2004-12-22 | 2006-07-13 | Basf Ag | Verfahren zur Herstellung von Papier, Pappe und Karton |
| US20060137843A1 (en) * | 2004-12-29 | 2006-06-29 | Sutman Frank J | Retention and drainage in the manufacture of paper |
| US8308902B2 (en) | 2004-12-29 | 2012-11-13 | Hercules Incorporated | Retention and drainage in the manufacture of paper |
| US20060142431A1 (en) | 2004-12-29 | 2006-06-29 | Sutman Frank J | Retention and drainage in the manufacture of paper |
| US20060142430A1 (en) * | 2004-12-29 | 2006-06-29 | Harrington John C | Retention and drainage in the manufacture of paper |
| US20060142429A1 (en) * | 2004-12-29 | 2006-06-29 | Gelman Robert A | Retention and drainage in the manufacture of paper |
| US20060142432A1 (en) * | 2004-12-29 | 2006-06-29 | Harrington John C | Retention and drainage in the manufacture of paper |
| BRPI0614081B1 (pt) * | 2005-05-16 | 2019-02-19 | Akzo Nobel Chemicals International B.V. | Composição auxiliar de drenagem e retenção, uso da composição e processo para produção de papel |
| US20060254464A1 (en) | 2005-05-16 | 2006-11-16 | Akzo Nobel N.V. | Process for the production of paper |
| US20060289139A1 (en) * | 2005-06-24 | 2006-12-28 | Fushan Zhang | Retention and drainage in the manufacture of paper |
| PL1969183T3 (pl) * | 2005-12-30 | 2015-05-29 | Akzo Nobel Chemicals Int Bv | Sposób wytwarzania papieru |
| US8273216B2 (en) | 2005-12-30 | 2012-09-25 | Akzo Nobel N.V. | Process for the production of paper |
| US7981250B2 (en) | 2006-09-14 | 2011-07-19 | Kemira Oyj | Method for paper processing |
| CA2664490A1 (en) | 2006-09-27 | 2008-04-03 | Ciba Holding Inc. | Siliceous composition and its use in papermaking |
| US8088251B2 (en) | 2006-10-25 | 2012-01-03 | Basf Se | Process for improving paper strength |
| US8349131B1 (en) | 2006-10-31 | 2013-01-08 | Louisiana Tech Research Foundation: a division of Louisiana Tech University Foundation, Inc. | Method for the manufacture of smart paper and smart wood microfibers |
| DE102008000811A1 (de) | 2007-03-29 | 2008-10-09 | Basf Se | Verfahren zur Herstellung von Papier |
| TWI453320B (zh) | 2007-03-30 | 2014-09-21 | Jujo Paper Co Ltd | Production method of coated base paper and coated paper |
| FR2923832B1 (fr) * | 2007-11-20 | 2011-01-07 | Roquette Freres | Composition anionique aqueuse contenant au moins un amidon anionique gelatinise, soluble et, de preference, un amidon anionique insoluble, non gelatinise ou partiellement gonfle. |
| FR2928383B1 (fr) | 2008-03-06 | 2010-12-31 | Georgia Pacific France | Feuille gaufree comportant un pli en materiau hydrosoluble et procede de realisation d'une telle feuille. |
| BRPI0917678B1 (pt) | 2008-09-02 | 2019-09-10 | Basf Se | processo para a produção de papel, de cartão e de papelão |
| BR112012027210A2 (pt) | 2010-05-05 | 2016-07-26 | Basf Se | composição de polpa para a produção de papel ou de cartolina, material de papel, papel ou cartolina, processo para produzir papel ou cartolina, e, uso |
| US8753479B2 (en) * | 2011-06-21 | 2014-06-17 | Basf Se | Production of paper, card and board |
| FI2820189T4 (fi) * | 2012-03-01 | 2024-06-04 | Basf Se | Menetelmä paperin ja pahvin valmistamiseksi |
| BR112015004139A2 (pt) | 2012-08-28 | 2017-07-04 | Basf Se | método e dispositivo de alimentação de pelo menos uma substância química a uma corrente de processo principal |
| RU2015115882A (ru) | 2012-10-05 | 2016-11-27 | Спешелти Минералз (Мичиган) Инк. | Суспензия наполнителя и ее использование в производстве бумаги |
| CA2886671A1 (en) | 2012-10-05 | 2014-04-10 | Specialty Minerals (Michigan) Inc. | Filler suspension and its use in the manufacture of paper |
| CN106928400B (zh) * | 2015-12-31 | 2020-09-08 | 艺康美国股份有限公司 | 一种两性聚合物及包含其的烯基琥珀酸酐乳液 |
| FI128012B (en) * | 2016-03-22 | 2019-07-31 | Kemira Oyj | A system and method for manufacture of paper, board or the like |
| CN109667193A (zh) * | 2019-01-28 | 2019-04-23 | 常州麒通国际贸易有限公司 | 一种复合造纸助留剂的制备方法 |
| WO2022119645A1 (en) | 2020-12-04 | 2022-06-09 | Agc Chemicals Americas, Inc. | Treated article, methods of making the treated article, and dispersion for use in making the treated article |
| CN114150527B (zh) * | 2021-12-17 | 2023-04-25 | 杭州绿邦科技有限公司 | 一种助留助滤剂 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2026914C1 (ru) * | 1994-01-13 | 1995-01-20 | Диклер Яков Ефимович | Способ приготовления бумажной массы |
| US5393381A (en) * | 1992-06-11 | 1995-02-28 | S N F | Process for the manufacture of a paper or a cardboard having improved retention |
| US5676796A (en) * | 1994-06-01 | 1997-10-14 | Allied Colloids Limited | Manufacture of paper |
| RU2109099C1 (ru) * | 1992-07-07 | 1998-04-20 | Ека Нобель Актиеболаг | Водная композиция проклеивающего агента и способ получения бумаги |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0017353B2 (en) * | 1979-03-28 | 1992-04-29 | Ciba Specialty Chemicals Water Treatments Limited | Production of paper and paper board |
| SE432951B (sv) | 1980-05-28 | 1984-04-30 | Eka Ab | Pappersprodukt innehallande cellulosafibrer och ett bindemedelssystem som omfattar kolloidal kiselsyra och katjonisk sterkelse samt forfarande for framstellning av pappersprodukten |
| US4506062A (en) | 1982-08-09 | 1985-03-19 | Allied Colloids Limited | Inverse suspension polymerization process |
| GB8309275D0 (en) | 1983-04-06 | 1983-05-11 | Allied Colloids Ltd | Dissolution of water soluble polymers in water |
| GB8401206D0 (en) | 1984-01-17 | 1984-02-22 | Allied Colloids Ltd | Polymers and aqueous solutions |
| SE8403062L (sv) | 1984-06-07 | 1985-12-08 | Eka Ab | Forfarande vid papperstillverkning |
| DE3541163A1 (de) | 1985-11-21 | 1987-05-27 | Basf Ag | Verfahren zur herstellung von papier und karton |
| GB8602121D0 (en) * | 1986-01-29 | 1986-03-05 | Allied Colloids Ltd | Paper & paper board |
| US4750974A (en) * | 1986-02-24 | 1988-06-14 | Nalco Chemical Company | Papermaking aid |
| US5171891A (en) | 1987-09-01 | 1992-12-15 | Allied-Signal Inc. | Oxidation of organic compounds having allylic or benzylic carbon atoms in water |
| US4795531A (en) * | 1987-09-22 | 1989-01-03 | Nalco Chemical Company | Method for dewatering paper |
| GB8828899D0 (en) * | 1988-12-10 | 1989-01-18 | Laporte Industries Ltd | Paper & paperboard |
| MX18620A (es) | 1988-12-19 | 1993-10-01 | American Cyanamid Co | Floculante polimerico de alto desempeño, proceso para su preparacion, metodo para la liberacion de agua de un dispersion de solidos suspendidos y metodo de floculacion de una dispersion de solidos suspendidos |
| US5167766A (en) | 1990-06-18 | 1992-12-01 | American Cyanamid Company | Charged organic polymer microbeads in paper making process |
| ES2089050T5 (es) | 1990-06-11 | 2002-09-01 | Ciba Spec Chem Water Treat Ltd | Microparticulas polimericas anionicas y anfotericas reticuladas. |
| EP0499448A1 (en) | 1991-02-15 | 1992-08-19 | Ciba Specialty Chemicals Water Treatments Limited | Production of paper |
| US5234548A (en) * | 1992-01-02 | 1993-08-10 | Vinings Industries Inc. | Production of paper and paperboard |
| GB9301451D0 (en) | 1993-01-26 | 1993-03-17 | Allied Colloids Ltd | Production of filled paper |
| US5482693A (en) | 1994-03-14 | 1996-01-09 | E. I. Du Pont De Nemours And Company | Process for preparing water soluble polyaluminosilicates |
| US5707494A (en) | 1994-03-14 | 1998-01-13 | E. I. Du Pont De Nemours And Company | Process for preparing water soluble polyaluminosilicates |
| US6193844B1 (en) * | 1995-06-07 | 2001-02-27 | Mclaughlin John R. | Method for making paper using microparticles |
| SE9504081D0 (sv) * | 1995-11-15 | 1995-11-15 | Eka Nobel Ab | A process for the production of paper |
| PT877120E (pt) * | 1995-12-25 | 2000-08-31 | Hymo Corp | Processo para o fabrico de papel |
| US6113741A (en) * | 1996-12-06 | 2000-09-05 | Eka Chemicals Ab | Process for the production of paper |
| NZ336427A (en) | 1996-12-31 | 2001-05-25 | Ciba Spec Chem Water Treat Ltd | Processes of making paper using a branched water soluble anionic polymeric retention aid |
| EP1388522B1 (en) | 1997-09-30 | 2016-09-14 | Ondeo Nalco Company | Colloidal borosilicates and their use in the production of paper |
-
2000
- 2000-10-17 TW TW089121642A patent/TW483970B/zh not_active IP Right Cessation
- 2000-11-01 MY MYPI20005114A patent/MY122329A/en unknown
- 2000-11-02 WO PCT/EP2000/010822 patent/WO2001034910A1/en not_active Ceased
- 2000-11-02 AT AT00977469T patent/ATE257195T1/de active
- 2000-11-02 RU RU2002113758/04A patent/RU2246566C2/ru active
- 2000-11-02 NZ NZ518468A patent/NZ518468A/en not_active IP Right Cessation
- 2000-11-02 CN CNB008152381A patent/CN1270026C/zh not_active Expired - Lifetime
- 2000-11-02 MX MXPA02004496A patent/MXPA02004496A/es active IP Right Grant
- 2000-11-02 PL PL354875A patent/PL205729B1/pl unknown
- 2000-11-02 JP JP2001536823A patent/JP3689042B2/ja not_active Expired - Fee Related
- 2000-11-02 HU HU0203071A patent/HU225698B1/hu unknown
- 2000-11-02 SK SK630-2002A patent/SK286454B6/sk not_active IP Right Cessation
- 2000-11-02 BR BRPI0015376-1A patent/BR0015376B1/pt not_active IP Right Cessation
- 2000-11-02 CA CA002389393A patent/CA2389393C/en not_active Expired - Lifetime
- 2000-11-02 EP EP00977469A patent/EP1238161B1/en not_active Expired - Lifetime
- 2000-11-02 ES ES00977469T patent/ES2210016T3/es not_active Expired - Lifetime
- 2000-11-02 CZ CZ20021579A patent/CZ296851B6/cs not_active IP Right Cessation
- 2000-11-02 KR KR1020027005833A patent/KR100587731B1/ko not_active Ceased
- 2000-11-02 BR BRPI0017445-9B1A patent/BR0017445B1/pt active IP Right Grant
- 2000-11-02 DE DE60007556T patent/DE60007556T2/de not_active Expired - Lifetime
- 2000-11-02 PT PT00977469T patent/PT1238161E/pt unknown
- 2000-11-02 DK DK00977469T patent/DK1238161T3/da active
- 2000-11-02 US US09/704,350 patent/US6454902B1/en not_active Expired - Lifetime
- 2000-11-06 AR ARP000105844A patent/AR026375A1/es active IP Right Grant
-
2002
- 2002-05-02 NO NO20022107A patent/NO332240B1/no not_active IP Right Cessation
- 2002-05-03 ZA ZA200203516A patent/ZA200203516B/en unknown
- 2002-08-02 US US10/211,898 patent/US6616806B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5393381A (en) * | 1992-06-11 | 1995-02-28 | S N F | Process for the manufacture of a paper or a cardboard having improved retention |
| RU2109099C1 (ru) * | 1992-07-07 | 1998-04-20 | Ека Нобель Актиеболаг | Водная композиция проклеивающего агента и способ получения бумаги |
| RU2026914C1 (ru) * | 1994-01-13 | 1995-01-20 | Диклер Яков Ефимович | Способ приготовления бумажной массы |
| US5676796A (en) * | 1994-06-01 | 1997-10-14 | Allied Colloids Limited | Manufacture of paper |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2388863C2 (ru) * | 2005-05-11 | 2010-05-10 | Стора Энсо Аб | Способ получения бумаги и бумага, полученная данным способом |
| RU2431709C2 (ru) * | 2007-02-05 | 2011-10-20 | Басф Се | Производство бумаги с наполнителем |
| RU2431710C2 (ru) * | 2007-02-05 | 2011-10-20 | Басф Се | Производство бумаги или картона |
| RU2345188C1 (ru) * | 2007-09-06 | 2009-01-27 | ООО "Оптимальные Химические Технологии+консалтинг" | Способ изготовления мешочной бумаги и мешочная бумага |
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2246566C2 (ru) | Способ изготовления бумаги и картона | |
| CA2425197C (en) | An improved retention/draining aid comprising a siliceous material and an organic microparticle | |
| RU2247184C2 (ru) | Способ изготовления бумаги или картона | |
| RU2247183C2 (ru) | Способ изготовления бумаги и картона | |
| CN104145060B (zh) | 生产纸和纸板的方法 | |
| RU2247185C2 (ru) | Способ изготовления бумаги и картона | |
| AU774331C (en) | Manufacture of paper and paperboard |