EP0215044A1 - Method for preparing a fibrous sheet by using paper manufacturing techniques. - Google Patents
Method for preparing a fibrous sheet by using paper manufacturing techniques.Info
- Publication number
- EP0215044A1 EP0215044A1 EP19860901427 EP86901427A EP0215044A1 EP 0215044 A1 EP0215044 A1 EP 0215044A1 EP 19860901427 EP19860901427 EP 19860901427 EP 86901427 A EP86901427 A EP 86901427A EP 0215044 A1 EP0215044 A1 EP 0215044A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibers
- filler
- aqueous suspension
- binder mixture
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 82
- 239000000835 fiber Substances 0.000 claims abstract description 80
- 239000011230 binding agent Substances 0.000 claims abstract description 77
- 239000007900 aqueous suspension Substances 0.000 claims abstract description 44
- 239000012764 mineral filler Substances 0.000 claims abstract description 30
- 239000000123 paper Substances 0.000 claims abstract description 23
- 125000002091 cationic group Chemical group 0.000 claims abstract description 22
- 230000014759 maintenance of location Effects 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 13
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 28
- 239000000049 pigment Substances 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 12
- 125000000129 anionic group Chemical group 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 10
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 229920000620 organic polymer Polymers 0.000 claims 1
- 238000002360 preparation method Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 239000002655 kraft paper Substances 0.000 description 10
- 238000004806 packaging method and process Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 5
- 239000011121 hardwood Substances 0.000 description 5
- 239000002609 medium Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002671 adjuvant Substances 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 229910001919 chlorite Inorganic materials 0.000 description 4
- 229910052619 chlorite group Inorganic materials 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- -1 on the one hand Substances 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- 238000013517 stratification Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000454 talc Substances 0.000 description 4
- 229910052623 talc Inorganic materials 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920001353 Dextrin Polymers 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 235000019425 dextrin Nutrition 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000002557 mineral fiber Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 229910052628 phlogopite Inorganic materials 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- AACHVWXCVWWMSI-UHFFFAOYSA-N 3-hydroxypropyl(trimethyl)azanium Chemical compound C[N+](C)(C)CCCO AACHVWXCVWWMSI-UHFFFAOYSA-N 0.000 description 1
- SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229960002684 aminocaproic acid Drugs 0.000 description 1
- 229940053200 antiepileptics fatty acid derivative Drugs 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007515 enzymatic degradation Effects 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229940005740 hexametaphosphate Drugs 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000006194 liquid suspension Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000006069 physical mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 150000003856 quaternary ammonium compounds Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000003763 resistance to breakage Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000002025 wood fiber 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
- 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
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/56—Polyamines; Polyimines; Polyester-imides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- 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
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H17/375—Poly(meth)acrylamide
-
- 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
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
- D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
-
- 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
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
-
- 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
- D21H23/08—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH
- D21H23/10—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH at least two kinds of compounds being added
-
- 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
Definitions
- the present invention relates to a new process for preparing a fibrous sheet by the papermaking route in order to improve, in general, the retention and, in particular, that of opacifying agents, by limiting manufacturing costs and by preserving or improving the mechanical properties compared to previously known techniques. It also relates, as a new industrial product, to the fibrous sheet obtained by this process.
- This new process is particularly useful in the manufacture of paper and cardboard, in particular in the field of printing-writing, packaging, coatings and special papers. It is particularly advantageous for the retention of mineral fillers such as opacifying agents in order to improve opacity, in particular opacity-contrast and opacity in oil.
- the improvement in retention results from the implementation of specific operating methods: - optimization of the average diameter of the load-binder flocs,
- the new method which is recommended is particularly advantageous for improving the retention of opacifying means.
- titanium oxide in particular of rutile or anatase variety, is an opacity and whitening pigment commonly used in paints, inks, plastics, paper and cardboard, cosmetics and ceramics, in particular due to its high covering power conferred by its high refractive index and its absorption by UV rays
- TiO 2 of the order of 10 to 11 FF / kg at present
- attempts to replace titanium oxide with a mixture of TiO 2 and another more economical mineral filler chosen in particular from talc, kaolin, alumina hydrate and CaCO 3 have been unsatisfactory in terms of both opacity and retention.
- a new opacity pigment is recommended which is particularly advantageous with regard to opacity-contrast and especially opacity with oil.
- This opacity pigment consists of a mixture of 10 to 70% by weight of TiO 2 and 30 to 90% by weight of an adjuvant chosen from lamellar silicates, and is obtained by co-grinding of TiO 2 and said lamellar adjuvant in order to generate an adsorption of titanium oxide on the fragmented particles of the adjuvant.
- lamellar silicates which are suitable according to this patent application, mention is made in particular of talc (hydrated magnesium silicate), chlorite (hydrated magnesium and aluminum silicate), kaolin, mica, phlogopite and their mixtures.
- the quantity of mineral filler entering the paper must be increased (for example, 4 parts by weight of TiO 2 are replaced by 7 parts by weight of a co-ground mixture of 80% by weight of lamellar silicate and 20% by weight of TiO 2 ) to obtain equivalent opacity.
- the content of the mineral filler is increased, the mechanical properties of the resulting fibrous sheet are reduced.
- the disadvantage of the increase in the content of mineral filler is overcome by retaining or even improving the mechanical properties such as in particular the resistance to breakage and to bursting, in particular when a good opacity is sought. .
- the process for preparing a fibrous sheet by paper techniques, which is recommended according to the invention to improve retention in which the pre-flocculated mixture is introduced into the head circuits of the paper machine of a flocculating agent of the mineral filler and of the organic binder in the aqueous suspension of fibers, then a flocculating agent is introduced before the headbox into the resulting aqueous suspension, said process being characterized in that 1) an aqueous suspension of fibers is prepared; 2) an aqueous suspension of mineral filler and binder is prepared in which the charging mixture is pre-flocculated by means of a cationic flocculant; 3) at the head circuits of the paper machine and before the head box of the latter, the aqueous suspension of the pre-flocculated charge mixture is introduced into the aqueous suspension of the fibers, so that (i) the diameter means of the flocs of the filler-binder mixture which are introduced into said suspension of fibers is between 0.01 and 0.3 mm, and (ii
- fibrous sheet is meant here a composite material comprising fibers, an inorganic filler, a binding agent and at least one flocculating means.
- This composite material which is prepared by the papermaking process, can also contain one or more conventional additives in stationery.
- the term "fibrous sheet” includes paper and board when the predominant fibers are cellulosic fibers, on the one hand, and nonwovens or synthetic papers when the fibers used are essentially non-cellulosic fibers. , on the other hand.
- the composite material obtained according to the abovementioned process is useful as a print-write support, coating support, packaging support or for obtaining special supports (in particular photographic supports, supports for carbonless copies and supports for stratification).
- the composite material according to the invention is particularly advantageous in particular in (i) the field of supports intended for impregnation with phenolic resins and / or melamines for the production of laminated or laminated panels, in order to avoid the material becoming transparent, (ii) the field of packaging supports (food packaging in particular) which must remain opaque in contact with grease or after complexing with waxes, resins and / or polymers which tend to affect the opacity of the final product.
- All the fibers are suitable for the preparation of the fibrous sheet according to the invention, in particular natural organic fibers (cellulosic fibers) or synthetic fibers (polyamide, polyester, polyalkylene, polyacrylate fibers) and mineral fibers (glass fibers, ceramic, acicular gypsum, carbon and rock wool) and their mixtures.
- natural organic fibers cellulosic fibers
- synthetic fibers polyamide, polyester, polyalkylene, polyacrylate fibers
- mineral fibers glass fibers, ceramic, acicular gypsum, carbon and rock wool
- noble wood fibers namely unbleached softwood and hardwood fibers, semi-bleached or bleached, optionally combined with recovered fibers, for example from old paper and textiles.
- cellulosic fibers with fibers of high synthetic polymers such as polyamide, polyester, polyethylene, polypropylene fibers or with mineral fibers such as glass, ceramic, calcium sulphate fibers. and carbon, or to cellulose regeneration fibers, or to their mixtures.
- high synthetic polymers such as polyamide, polyester, polyethylene, polypropylene fibers or with mineral fibers such as glass, ceramic, calcium sulphate fibers. and carbon, or to cellulose regeneration fibers, or to their mixtures.
- an anionic means to the aqueous suspension of the fibers of stage 1 ° in order to make said fibers substantial by strengthening their anionic power.
- This means which contributes to improving the fiber-filler connections and consequently the internal cohesion of the fibrous sheet, is introduced into said aqueous suspension of the fibers before the incorporation in stage 3 ° of the flocculated particles of the filler-binder mixture.
- this anionic means will be chosen from polymers of the poyacrylic derivative type such as polyacrylamides (in particular modified polyacrylamides having a high average molecular weight - of the order of 5 ⁇ 10 6 to 10 7 ) polymetacrylamides, polyacrylates and polymetacrylates sodium, potassium and ammonium.
- the amount of anionic means depends on the anionicity of the paste used, which is linked to the manufacturing process (kraft or bisulfite paste) but also to the conditions for washing the paste before use.
- a kraft pulp from an integrated factory has a much stronger anionic character than a dried and stored pulp before being sent to the paper machine.
- a dose of 0.02% to 0.5% by weight of anionic means relative to the weight of the fibrous sheet will be used, and preferably 0.05% to 0.2% of said means relative to the weight of the fibrous sheet.
- the mineral fillers according to the invention are essentially non-binding mineral fillers.
- Particularly suitable are the usual mineral fillers in the stationery and paint industries such as, for example, talc, kaolin, natural calcium carbonate, precipitated or originating from the regeneration operations of black liquors extracted from the cooking of kraft pastes and more. particularly after the caustification operation, magnesium carbonate, alumina hydrates, calcium sulphate, colloidal silica, barium sulphate, titanium dioxide, white satin (hydrated calcium sulphoaluminate), magnesium hydroxide, or mixtures thereof.
- the opacity pigment described in the above-mentioned French patent application No. 84 19957.
- This opacity pigment is obtained by co-grinding TiO 2 and lamellar silicate so that the fragmented particles of TiO 2 are adsorbed on the new activated surfaces resulting from the fragmentation of the lamellar silicate.
- the aforementioned French patent application demonstrates how and why this pigment is distinguished, both in terms of structure and in terms of final opacity, from the physical mixtures of the two ingredients previously envisaged.
- Co-grinding can be carried out dry by introducing TiO 2 and the lamellar silicate into a gas stream adapted to entrain the particles of the two products at supersonic speed and to project them against each other in order to obtain the fragmentation and the aforementioned adsorption, in particular by means of a mill of the "JET-O-MIZER” type (manufactured by the Company Fluid-Energy) or "COX" (manufactured by the Company Cox-Brothers and C °).
- the co-grinding can also be carried out by wet channel by preparing a liquid suspension containing the starting products in divided form and by agitating this suspension in the presence of solid balls so as to break the particles of the two products between the balls in order to obtain the aforementioned fragmentation and adsorption, in particular by means of a grinder of the "BABCOCK BALL MILL" type.
- Said opacity pigment is a mixture consisting of 10 to 70% by weight of TiO 2 and 90 to 30% by weight of lamellar silicate (talc, chlorite, kaolin, mica, phlogopite and their mixtures); it advantageously has an average particle size (as defined in said French application) of between 0.5 and 1.5 microns and is obtained by co-grinding of TiO 2 having an average particle size of 60 to 100 microns and of lamellar silicate having a medium particle size greater than 2.5 microns and preferably between 8 and 12 microns.
- lamellar silicate talc, chlorite, kaolin, mica, phlogopite and their mixtures
- the aforementioned French application recommends in particular for the opacity-contrast a pigment consisting of 30 to 50% by weight of TiO 2 and from 70 to 50% by weight of lamellar silicate, and for the opacity in oil a pigment consisting from 10 to 30% by weight of TiO 2 and from 90 to 70% by weight of lamellar silicate.
- the mineral filler-fiber weight ratio is not critical, it can be in particular between 0.01 and 6, depending on the desired applications.
- the amount of mineral filler in the fibrous sheet may vary from 5 to 8.
- the loading rate may be greater than 50% by weight relative to the weight of the fibrous sheet.
- the amount of mineral filler may vary between 2 and 15% by weight relative to the weight of the fibrous sheet.
- the organic binder which can be used in the process according to the invention is any organic binder, natural or synthetic, usually used in stationery. It ensures the connection of the constituents of the material together and makes it possible to improve the physical properties of the sheet material.
- binders which are suitable according to the invention, mention may in particular be made of starches native or modified by chemical, enzymatic or thermal means, dextrins, polyvinyl alcohols, casein, animal glue, vegetable proteins, cellulosic esters such as / carboxymethylcellulose, alginates, dispersions of synthetic polymers such as carboxylated or non-carboxylated styrenebutadiene latexes, acrylic latexes, s, styrene-acrylic latexes, vinyl acetate latexes, neoprene latexes, acrylonitrile latexes, vinyl chloride latexes and mixtures thereof.
- the amount of binder depends on the end use envisaged for the sheet material; it can in particular vary between 1 and 40 parts by weight, and preferably between 1 and 25 parts by weight, relative to 100 parts by weight of fibers and mineral filler.
- the pre-flocculation of the mineral filler-binder mixture of stage 2 ° is carried out by means of a flocculant which aims to ionically destabilize said filler-binder mixture before mixing with the fibers.
- This product hereinafter designated “flocculant I”
- flocculant I will advantageously be chosen from cationic organic flocculants rather than from mineral cationic flocculants such as aluminum sulphate and aluminum polychlorides.
- organic cationic flocculants which are suitable in the process of the invention, there may be mentioned in particular polyethyleneimine, polyamide-amine, especially crosslinked polyalkylamine, especially modified polyacrylamide, quaternary ammonium compounds such as in particular chloride / hydroxypropyltrimethylammonium and cationic starches.
- the cationic organic flocculant which occurs in stage 2 ° is incorporated, in the form of an aqueous solution or suspension, preferably continuously, in the aqueous suspension containing the mineral filler and the organic binder, in an amount generally between 0.006 and 5 parts in by weight, and preferably between 0.01 and 2 parts by weight per 100 parts by weight of the mixture of mineral filler and binder.
- the exact amount to be used depends on four factors: - the concentration of the aqueous suspension of filler and binder;
- the flocculant-filler-binder contact time which is linked to the configuration of the paper machine's head circuits; - agitation, and - the cationic power of the flocculant.
- this quantity is adjusted so that the preflocculation of the filler-binder mixture is essentially carried out in a maximum of one minute.
- the average diameter of the flocs of the filler-binder mixture is between 0.01 and 0.3 mm, and preferably between 0.03 and 0.15 mm, when said pre-flocculated mixture is introduced into the aqueous suspension of fibers.
- the preflocculated filler-binder mixture is introduced at the 3 ° stage as close as possible to the headbox, so that the duration of contact of the filler-binder mixture with the fibers is between 10 and 60 seconds, and preferably between 10 and 45 seconds. If the said contact time is greater than 60 seconds, there will be excessively large fiber-filler-binder flocs and consequently the fibrous sheets may not be uniform.
- stage 4 ° the cationic flocculant, which is incorporated into the fiber-filler-binder mixture resulting from stage 3 °, is introduced into the head circuits very close to the head box so that the duration of contact of said flocculant with the fiber-filler-binder mixture is less than 45 seconds and preferably between 8 and 30 seconds.
- the cationic flocculant of stage 4 ° which is designated below “flocculant II”, will be chosen from organic and mineral agents for ionic destabilization.
- Flocculant II can, like flocculant I, be a cationic organic substance, or unlike flocculant I, a cationic mineral substance such as for example aluminum sulphate and poly aluminum chloride.
- flocculant II can be identical to flocculant I.
- the flocculant II is a cationic mineral substance such as for example aluminum sulphate
- the white water which is collected in the wet part of the paper machine, in particular under the cloth, and that is recycled, increase the size of the load-binder flocs, because of their Al 2 (SO 4 ) 3 content .
- two solutions are recommended: do not put the recycled white water in contact with the aqueous suspension of the filler-binder mixture from stage 2 ° until the start of stage 3 °, or provide a shearing device to reduce the diameter by means of the flocs of said filler-binder mixture just before its introduction into the aqueous suspension of fibers at stage 3 °.
- the ionic demand of the fibers in the suspension containing said fibers, the mineral filler and the binder obtained in stage 3 ° is less than or equal to 20 milliequivalents per gram of dry matter.
- the ionic demand will be in particular from 1 to
- the ionic demand will be in particular of the order of 10 milliequivalents per gram.
- the sizing agents usually used in stationery to reduce the water sensitivity of the sheet such as modified rosins, paraffin emulsions, dimeric alkyl ketenes,
- pH regulating agents for example aluminum sulphate (which can act as a flocculant II, as indicated above), or sulfuric acid to adjust the pH between 4.5 and 6 for bonding in an acid medium,
- - coloring or shading agents such as urea-formaldehyde, melamine-formaldehyde, glyoxal, crosslinked cationic polyalkyleneamines, melamine-formaldehyde condensation products and / amino-caproic acid,
- fungicidal and / or bactericidal agents as well as conventional auxiliary additives in printing-writing coating baths such as dispersing agents (in particular hexametaphosphate and sodium pyrophosphate), lubricating agents (in particular fatty acid derivatives , for example sodium or calcium leaté-arate) and viscosity regulating agents (in particular there gelatin, ethylenediamine and urea).
- dispersing agents in particular hexametaphosphate and sodium pyrophosphate
- lubricating agents in particular fatty acid derivatives , for example sodium or calcium leaté-arate
- viscosity regulating agents in particular there gelatin, ethylenediamine and urea.
- Stage 1 ° a) the cellulose fibers in aqueous suspension coming from defibration in a pulper (non-integrated factory) or directly from the pulp manufacturing workshop (integrated factory) are stored at a concentration of 40-400 g / l under agitation in a vat room; b) the cellulosic fibers are conventionally refined to a Schoepper-Riegler degree of between 15 and 65 depending on the applications, at a variable concentration of between 20 and 350 g / l, in particular between 20 and 60 g / l, per using standard conical or double disc refiners, or in particular between 250 and 350 g / l with special refiners for high concentration refining, in particular in the case of the production of packaging supports, in order to obtain high tear resistance .
- organic fibers can be introduced, if necessary and / or mineral which we want to associate with cellulosic fibers; c) the anionic means required as indicated above to make the fibers substantial are added with stirring, at a dose of between 0.02 and 0.5% and preferably 0.05 to 0.2% by weight relative to the weight of the fibrous sheet.
- the mineral filler is dispersed in an aqueous medium at a concentration of between 150 and 600 g / l, preferably at a concentration of 300-400 g / l.
- This mineral filler can consist entirely of an opacifying agent or of a mixture of several fillers including in particular an opacifying agent.
- the preferred binder is native starch.
- c) mixing is carried out with stirring, preferably continuously, of the aqueous suspension of the mineral filler and of the aqueous preparation of the binder.
- This operation is advantageously carried out in a dynamic conical mixer with a propeller which ensures perfect homogeneity of the filler-binder mixture.
- the flocculant I is incorporated into said filler-binder mixture after having been diluted with water from 10 to 100 times (dilution greater than 10 times and less than or equal to 100 times).
- the amount of flocculant I which is introduced is between 0.006 and 5 parts by weight, and preferably between 0.01 and 2 parts by weight per 100 parts by dry weight of the filler-binder mixture.
- the charge suspension is introduced continuously, on the one hand, and the aqueous preparation of the binder, on the other hand, each in the vicinity of the top of a dynamic conical mixer with a propeller; the flocculant I is continuously introduced in the vicinity of the middle of the height of said mixer which comprises, near its lower end, a dilution water inlet, in order to carry out the required dilutions.
- the charging mixture thus pre-flocculated is collected continuously at the lower end of the mixer.
- the charge-binder mixer pre-flocculated in aqueous suspension at 100-200 g / l is introduced continuously at the level of the head circuits into the aqueous suspension of the fibers prepared in stage 1 °, the mean flock diameter of said charge-binder mixture being included between 0.01 and 0.3 mm, and preferably between 0.03 and 0.15 mm, the introduction of said pre-flocculated mixture being carried out as close as possible to the headbox so that the duration of contact of said mixture load-binder with the fibers is less than 60 seconds and advantageously between 10 and 45 seconds.
- the duration of contact of the flocculant II with the flocculated fiber-filler-binder mixture being less than 45 seconds and preferably between 8 and
- a fibrous sheet useful as a printing-writing medium having a basis weight of 64 g / m 2 is formed .
- COMPARATIVE TEST I The sheet obtained according to Example 1 was compared with control sheets obtained according to a conventional technique (A 1 ) and according to the teaching of FR-A-2 492 425 (B 1 ) having the same grammage (64 g / m 2 ), from the same cellulosic fibers (35 °
- the fibrous sheet of Example 2 was compared with a fibrous sheet (A2) obtained under substantially similar conditions with regard to the choice of cellulosic fibers, binder and flocculant I, the opacity pigment being replaced by TiO 2 as in comparative test I above.
- a fibrous sheet is prepared for packaging in
- Example 3 The product obtained according to Example 3 was compared with a conventional fibrous sheet (A3) in 70 g / m 2 in which the opacity pigment was replaced by TiO 2 , the cellulosic fibers and the average particle size of the TiO 2.
- A3 paper being respectively identical to the fibers of Example 3 and to the average particle size of the opacity pigment.
- Table III The compositions of Ex 3 and A3, as well as the results which have been obtained are shown in Table III
- the support thus obtained has a grammage of 40 g / m 2 .
- a support for stratification (Ex 5) according to the invention is prepared from a mixture of cellulosic fibers comprising: bleached bisulfite softwood fibers ........ 40% by weight bleached kraft hardwood fibers ... ......... 60% by weight refining prevail conveniently.... .28 ° SR the opacity pigment is identical to that of Example 1 above, as well as the values d m , t 1 and t 2 .
- a support for stratification of 90 g / m 2 is obtained.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
Nouveau procédé de préparation d'une feuille fibreuse par voie papetière en vue d'améliorer la rétention et en particulier l'opacité, ce procédé étant caractérisé en ce que 1) on prépare une suspension aqueuse de fibres; 2) on prépare une suspension aqueuse de charge minérale et de liant dans laquelle le mélange charge-liant est préfloculé au moyen d'un floculant cationique; 3) au niveau des circuits de tête de la machine à papier et avant la caisse de tête de celle-ci, on introduit la suspension aqueuse du mélange charge-liant préfloculé dans la suspension aqueuse des fibres, de telle façon que (i) le diamètre moyen des flocs du mélange charge-liant que l'on introduit dans ladite suspension des fibres soit compris entre 0,01 et 0,3 mm, et (ii) la durée de contact dudit mélange charge-liant avec les fibres dans la suspension résultante soit comprise entre 10 et 60 secondes; 4) avant la caisse de tête, on introduit un floculant cationique dans la suspension aqueuse du mélange fibres-charge-liant obtenue au stade 3), de telle façon que la durée de contact dudit floculant avec ledit mélange fibres-charge-liant soit inférieure à 45 secondes; 5) on introduit la suspension aqueuse résultante dans la caisse de tête et forme une feuille sur machine à papier que l'on presse et sèche.New process for preparing a fibrous sheet by the papermaking route in order to improve retention and in particular opacity, this process being characterized in that 1) an aqueous suspension of fibers is prepared; 2) an aqueous suspension of mineral filler and binder is prepared in which the filler-binder mixture is pre-flocculated by means of a cationic flocculant; 3) at the level of the head circuits of the paper machine and before the head box thereof, the aqueous suspension of the preflocculated filler-binder mixture is introduced into the aqueous suspension of the fibers, so that (i) the mean diameter of the flocs of the filler-binder mixture that is introduced into said suspension of fibers is between 0.01 and 0.3 mm, and (ii) the duration of contact of said filler-binder mixture with the fibers in the suspension resulting is between 10 and 60 seconds; 4) before the headbox, a cationic flocculant is introduced into the aqueous suspension of the fiber-filler-binder mixture obtained in step 3), so that the contact time of said flocculant with said fiber-filler-binder mixture is less at 45 seconds; 5) the resulting aqueous suspension is introduced into the headbox and forms a sheet on a paper machine which is pressed and dried.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86901427T ATE53411T1 (en) | 1985-03-18 | 1986-03-07 | PROCESS FOR MAKING A FIBER SHEET IN A PAPERMAKER STYLE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8503947 | 1985-03-18 | ||
FR8503947A FR2578870B1 (en) | 1985-03-18 | 1985-03-18 | PROCESS FOR PREPARING A FIBROUS SHEET BY PAPER TO IMPROVE RETENTION AND IN PARTICULAR OPACITY. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0215044A1 true EP0215044A1 (en) | 1987-03-25 |
EP0215044B1 EP0215044B1 (en) | 1990-06-06 |
Family
ID=9317288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860901427 Expired - Lifetime EP0215044B1 (en) | 1985-03-18 | 1986-03-07 | Method for preparing a fibrous sheet by using paper manufacturing techniques |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0215044B1 (en) |
JP (1) | JPS62502696A (en) |
DE (1) | DE3671767D1 (en) |
ES (1) | ES8801009A1 (en) |
FI (1) | FI81157C (en) |
FR (1) | FR2578870B1 (en) |
WO (1) | WO1986005530A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2618373B1 (en) * | 1987-07-23 | 1990-03-23 | Arjomari Prioux | REINFORCED THERMOPLASTIC SHEET AND MANUFACTURING METHOD THEREOF |
GB9301451D0 (en) * | 1993-01-26 | 1993-03-17 | Allied Colloids Ltd | Production of filled paper |
US5830317A (en) * | 1995-04-07 | 1998-11-03 | The Procter & Gamble Company | Soft tissue paper with biased surface properties containing fine particulate fillers |
US5958185A (en) * | 1995-11-07 | 1999-09-28 | Vinson; Kenneth Douglas | Soft filled tissue paper with biased surface properties |
US5611890A (en) * | 1995-04-07 | 1997-03-18 | The Proctor & Gamble Company | Tissue paper containing a fine particulate filler |
US5700352A (en) * | 1996-04-03 | 1997-12-23 | The Procter & Gamble Company | Process for including a fine particulate filler into tissue paper using an anionic polyelectrolyte |
US5672249A (en) * | 1996-04-03 | 1997-09-30 | The Procter & Gamble Company | Process for including a fine particulate filler into tissue paper using starch |
US5759346A (en) * | 1996-09-27 | 1998-06-02 | The Procter & Gamble Company | Process for making smooth uncreped tissue paper containing fine particulate fillers |
EP1194647A1 (en) * | 1998-10-14 | 2002-04-10 | The Mead Corporation | Colorant application on the wet end of a paper machine |
JP4788429B2 (en) * | 2005-03-25 | 2011-10-05 | 日本製紙株式会社 | Paper with improved paper strength and stiffness, method for producing the same, and method for improving plastic wire wear |
JP2007092203A (en) * | 2005-09-28 | 2007-04-12 | Nippon Paper Industries Co Ltd | Neutral newsprint paper for offset printing |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1443777A (en) * | 1964-08-17 | 1966-06-24 | Basf Ag | Process for increasing the efficiency of cationic polymer auxiliaries used in papermaking |
FR2492425A1 (en) * | 1980-10-21 | 1982-04-23 | Gascogne Papeteries | PROCESS FOR THE PREPARATION BY PAPER TECHNIQUES OF A SHEET MATERIAL WITH IMPROVED MACHINE RETENTION, SHEET MATERIAL OBTAINED AND ITS APPLICATION IN PARTICULAR IN THE FIELD OF PRINTING WRITING, PACKAGING AND COATINGS |
US4445970A (en) * | 1980-10-22 | 1984-05-01 | Penntech Papers, Inc. | High mineral composite fine paper |
-
1985
- 1985-03-18 FR FR8503947A patent/FR2578870B1/en not_active Expired
-
1986
- 1986-03-07 DE DE8686901427T patent/DE3671767D1/en not_active Expired - Fee Related
- 1986-03-07 EP EP19860901427 patent/EP0215044B1/en not_active Expired - Lifetime
- 1986-03-07 JP JP50145586A patent/JPS62502696A/en active Pending
- 1986-03-07 WO PCT/FR1986/000073 patent/WO1986005530A1/en active IP Right Grant
- 1986-03-12 ES ES553296A patent/ES8801009A1/en not_active Expired
- 1986-11-14 FI FI864653A patent/FI81157C/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO8605530A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3671767D1 (en) | 1990-07-12 |
FR2578870B1 (en) | 1988-07-29 |
ES553296A0 (en) | 1987-12-01 |
FR2578870A1 (en) | 1986-09-19 |
FI864653A (en) | 1986-11-14 |
EP0215044B1 (en) | 1990-06-06 |
FI864653A0 (en) | 1986-11-14 |
FI81157C (en) | 1990-09-10 |
FI81157B (en) | 1990-05-31 |
JPS62502696A (en) | 1987-10-15 |
WO1986005530A1 (en) | 1986-09-25 |
ES8801009A1 (en) | 1987-12-01 |
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