SE535500C2 - Surface preparation composition and paper or paperboard containing a surface treatment composition - Google Patents
Surface preparation composition and paper or paperboard containing a surface treatment composition Download PDFInfo
- Publication number
- SE535500C2 SE535500C2 SE1051056A SE1051056A SE535500C2 SE 535500 C2 SE535500 C2 SE 535500C2 SE 1051056 A SE1051056 A SE 1051056A SE 1051056 A SE1051056 A SE 1051056A SE 535500 C2 SE535500 C2 SE 535500C2
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- Sweden
- Prior art keywords
- starch
- composition
- salt
- paper
- composition according
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 88
- 239000000123 paper Substances 0.000 title claims abstract description 54
- 239000011087 paperboard Substances 0.000 title claims abstract description 30
- 238000004381 surface treatment Methods 0.000 title claims description 18
- 229920002472 Starch Polymers 0.000 claims abstract description 79
- 239000008107 starch Substances 0.000 claims abstract description 79
- 235000019698 starch Nutrition 0.000 claims abstract description 79
- 150000003839 salts Chemical class 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 45
- 239000000654 additive Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 2
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920001744 Polyaldehyde Polymers 0.000 claims description 2
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000008064 anhydrides Chemical class 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims description 2
- 125000000250 methylamino group Chemical class [H]N(*)C([H])([H])[H] 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229920001228 polyisocyanate Polymers 0.000 claims description 2
- 239000005056 polyisocyanate Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 26
- 238000007639 printing Methods 0.000 description 15
- 239000000049 pigment Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000004513 sizing Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 239000001041 dye based ink Substances 0.000 description 6
- 239000001042 pigment based ink Substances 0.000 description 6
- 238000007641 inkjet printing Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000000518 rheometry Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- -1 calcium chloride Chemical class 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000019612 pigmentation Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 2
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 235000009973 maize Nutrition 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 description 1
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920002324 Galactoglucomannan Polymers 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 241000135164 Timea Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229940072056 alginate Drugs 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 229920006320 anionic starch Polymers 0.000 description 1
- 230000000740 bleeding effect 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
- 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- WOLATMHLPFJRGC-UHFFFAOYSA-N furan-2,5-dione;styrene Chemical compound O=C1OC(=O)C=C1.C=CC1=CC=CC=C1 WOLATMHLPFJRGC-UHFFFAOYSA-N 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 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
- D21H17/21—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
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—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
- 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
- D21H21/14—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 characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- 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
- D21H21/50—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 characterised by form
- D21H21/52—Additives of definite length or shape
- D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
- B41M5/0017—Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
16 ABSTRACT The present invention relates to a surface treatmentcomposition for paper, paperboard or other fibrous webswherein the composition comprises starch particles thatcomprise at least one salt, The invention further relatesto a paper or paperboard being surface treated with said composition.
Description
The predominant part of all paper and paperboard that isinkjet to be used in copying machines, laser printers, printers and other different printing methods such as offset printing and flexoprinting, is surface treated with some sort of composition in order to improve printabilityas well as other properties of the paper or paperboard. Thecomposition is often either a surface sizing composition or a coating color.
If the composition mainly comprises starch in a dissolved the surface treatment composition is called a surface form,sizing. If the composition contains some sort of pigment inthe form of solid particles, the composition is called a pigmentation composition or a coating color.
Surface sizing compositions mainly consists of modifiedstarches or other hydrocolloids or surface sizing agents.
Furthermore, surface sizing improves the surface strength and printability of the paper or paperboard surface.
Compositions containing pigments, i.e. pigmentation compositions or coating colors, are most often used to improve the printability of the paper. Moreover, the smoothness of the surface of the paper or board isimprovement and the control of printing ink absorption canbe improved. The colorant of the ink should mainly beabsorbed on the surface of the paper and the solvent of theink should be penetrated into the paper. To these advantages may be added that the paper exhibits an improved “f@@iing”.
A conventional coating color usually contains an inorganic pigment that most often consists of calcium carbonate and/or clay. Other pigments exist too, such as e.g. silicon dioxide and in rare occasions, organic pigments such as plastic pigments. Besides plastic pigments, the paste also contains a binding agent that canconsist of dissolved starch and/or a synthetic binding agent. Examples of common synthetic binding agents are styrene butadiene latex and acrylate latex.
Inkjet printing, puts high demands on a printing paper,since the ink must be quickly dried on the substrate ande.g. a high optical minimized feathering and bleeding and low yet provide a high print quality with,print density,strike-through. In recent years it has been found that when multivalent salts, such as calcium chloride, are added to the surface size, the applied ink will precipitate fast onthe surface of the paper and give rise to a significantin print quality. This is especially US6207258 discloses a improvementadvantageous in inkjet printing.composition useful for surface treating a sheet substrate for inkjet printing, the composition comprising a salt of a divalent metal.
Multivalent cations, e.g, calcium, are sometimes added tosizing or coating compositions in the form of lubricants,the concentration of calcium stearate. However, e.g. calcium, calcium stearate is not high enough to in e.g.give rise to the desired effects on the print quality.Therefore, the calcium amounts needs to be higher than traditionally used in such products.
One problem with the addition multivalent salts tocoating and/or sizing compositions is that the highconcentration of salt needed in order to achieve thedesired effects oftentimes causes rheology problems andThis is especially a problem when is added to undesired precipitations. high amounts, such as l~5 parts of salt, anionically charged sizing, pigmentation or coating compositions. Multivalent cations interact strongly with typical anionic-charged polymers or minerals, or additives which are used in papermaking. Improvement in calciumstability of anionically charged particles can e.g. beimproved by providing steric or electrosteric stability.
However, high amounts of electrolytes may cause colloidal flocculation and precipitation.
Ink-jet printing can be done with different types of inks, either dye-based inks, pigment based inks or inks based on the combination of pigment and dye. Starch, especially cross-linked starch, improves the printing properties of a paper or paperboard when printed with dye-used as a surface treating based inks. Cross~linked starch composition is described in for example WOO302lO39. The printing properties for pigment based inks improves by the presence of metal salts.
It is an object of the present invention to find asolution to the problem of adding additives, such as saltsof multivalent metals, to surface sizing and/or coating orpigmentation compositions without disturbing therheological profile of the composition at the same time asit improves the printing properties of both dye-based and pigment based inks.
SUMMARY OF THE INVENTION The above object, and other advantages, is achieved by the surface treatment composition of the present invention.
The present invention relates to a surface treatmentcomposition for paper, paperboard or other fibrous webswherein the composition comprises starch particles that comprise at least one salt.
The at least one salt is preferably incorporated in thestarch particle. In this way it is possible to increase theamount of salt added to a surface treatment composition and also to the surface of a paper or paperboard.
The at least one salt is preferably a salt of amultivalent metal, such as a divalent or trivalent metal.The salt is preferably a calcium, magnesium or aluminumsalt, preferably calcium chloride or polyaluminum chloride.The starch is preferably cross-linked starch. By usingcross-linked starch in a surface treatment composition itis possible to subject the composition and/or the starch toelevated temperature without dissolving the entire amount of starch particles. In this way the starch particles tend to stay on the surface of a treated paper or paperboard and thus not being absorbed into the paper or paperboard: This improves the printing properties of the paper orpaperboard. Another advantage with the cross-linked starchis that the absorption of the printed ink is improved. Itis important that the colorant of the ink is absorbed and mainly kept on the surface of the paper and that the solvent, i.e. water or ink solvent, is quickly released by the composition and absorbed by the paper. Due to the improved absorption of the composition it is also possible increase the amount of ink added to the paper or paperboard. The paper or paperboard is thus not as sensitive to large amount of ink, which makes it possible to improve the printing quality of prints demanding high amounts of ink, such as pictures. Also, some solvent of inks demands cross-linked polymers in order to work properly.
The starch is preferably cross-linked by one or morecompounds chosen from the group that consists of methylamine compounds, polyvalent acids, polyvalent acid esters, polyvalent acid halides, polyvalent acid anhydrides, polyaldehydes, polyepoxides, polyisocyanates, divinyl compounds, phosphoryl chloride, polyamine polyepoxide resin, l,4-butane diolglycidyl ether, epichlorohydrin, trimetaphosphates, mixtures of anhydrides of acetic acid and two and three protonic acids, sodium hypochlorite, or mixtures thereof.
The composition preferably comprises starch particles inan amount of more than 65% by weight, and at least lO% byweight of the starch in the composition consists of starchparticles in the entire temperature range of 20-50°C. Both bulk and stiffness of the treated paper or paperboard is improved when starch in the form of particles is present in the composition.
The ratio between the salt and starch of the compositionis preferably between l:5O to l:5. There is an optimalamount of both starch and salt in the composition. More orless starch respectively salt will deteriorate ink-jet printing properties of the paper or paperboard.
The composition preferably comprises dissolved starch.The dissolved starch will work as a binder of thecomposition.
The composition may also comprise an additive, preferablyan anionic or amphoteric additive which will modify thestarch particles. In this way it is possible to alter the charge of the particles making them more stable or more compatible to other additives or to the fibers.
The invention also relates to a paper or paperboardproduct comprising a surface layer of a surface treatment composition as described herein.
DETAILED DESCRIPTION OF THE INVENTION The surface-treatment composition of the presentinvention comprises starch particles encapsulating at leastone salt. The salt can be said to be trapped in the starchparticle. The use of such particles in a surface treatmentcomposition increases the printing properties of both dyebased and pigment based inks. Also, such compositiondecreases rheology and viscosity problems that areconnected with prior art compositions comprising as high concentrations of salt as the inventive composition.
Consequently, higher concentrations of the salts in asurface treatment composition may be used without causing rheology or viscosity problems.
By addition of the surface treatment compositionaccording to the invention to a surface of a paper orpaperboard, it is possible to increase the amount of salton the surface of the paper or paperboard at the same timeas the amount of salt, seeing to the entire paper orpaperboard, is decreased compared to prior art solutions.This is due to that the surface treatment composition andthus also the salt of the composition is, to a largerextent, retained on the surface of the paper or paperboard.The added salt is thus not absorbed into the paper orpaperboard making it possible to decrease the amount ofsalt added in order to achieve the desired amount of salt on the surface and thus also good printing properties.
Another advantage with the present surface treatmentcomposition is that it improves the printing properties ofa paper or boards since the colorant of the ink which isprinted is absorbed on the surface and thus not absorbed bythe treated paper or paperboard. The cross~linked starchwill absorb the ink and since the starch is added andretained on the surface of a paper or paperboard the ink isthus also retained on the surface and not absorbed furtherinto the paper or paperboard. Furthermore, the ink willalso come in contact with the incorporated salt since thestarch particle will absorb the ink and the ink will thusget in contact with the salt within the starch particle.This also improves the printability since the ink is absorbed on the surface of the paper or paperboard. In this way the surface treatment composition is suitable for both dye based and pigment based inks.
The composition preferably also comprises dissolved starch. The dissolved starch will work as a binder. As a consequence of the dissolved starch, the composition willalso comprise dissolved salt that is released when thestarch is dissolved. The dissolved salt will improve theprinting properties of a treated paper or paperboard in the same way as metal salts used in prior art, i.e. when saltis added as a separate component to a paper or paperboardthe dissolved salt will also decrease surface. Furthermore, the viscosity of the composition which makes it possible to increase the dry content of the composition.
The surface treatment composition can be seen as both a surface sizing composition and a coating color. The surface treatment composition according to the invention preferablycomprises both dissolved starch as well as starchthe composition gives both sizing particles. Consequently, and coating properties to the treated paper or paperboard.
The salt is preferably a salt of a multivalent metal, such as a divalent or trivalent metal salt, for example calcium, magnesium or aluminum salt, which is added. It is preferred to use calcium chloride or polyaluminiumchloride. Use of particles comprising multivalent metalssalts according to the invention, render it possible todose a higher concentration of multivalent metals salt to asizing or a coating composition without effecting the the rheology of the composition negatively. In this way, printability of the sized or coated paper or board can be improved. Moreover, use of the particles according to the invention also reduces the concentration of the free anion of the multivalent salt, e.g. a chloride ion, in the composition whereby the risk of corrosion is reduced.The starch particle is preferably cross-linked. The dry starch particles is preferably of a size of between l-1000 um , even more preferably between l~l00 um. It ispreferred that the starch particle is a cross-linked starchgel. At none or a very low degree of cross-linking, the starch dissolves if a starch slurry is heated. At anincreased degree of cross-linking the amount of the starch that dissolves decreases. The starch used in the invention may have very different degrees of cross-linking. From a O relatively low degree of cross-linking, in which about l0 6 by weight (by total weight of the composition) of the starch exist as solid particles at a temperature of about to 50 °C, and the rest of the starch constitutes a binder in dissolved form, to a high degree of cross~ linking, where about 100 % of the starch exist as solid particles in the temperature interval given above. lt is O preferred that at least l5 %, preferably at least 20 6 by weight (by total weight of the composition) of the starch content of the composition at about 20 to 50 °C isconstituted by starch particles according to the invention.It should be noted that what has just been stated is not contradictory to the limitation that more than 65 % by weight (by total weight of the composition) of the solids content should be starch particles, given that the solid pigments of the composition are essentially only composedof these starch particles or only at very small amounts comprise other types of pigments. Independent of the cross- linking degree, the composition may also contain other types of soluble starch or some synthetic polymer, in order to obtain an adequate amount of binder and further improved printability properties. Examples of such polymers are styrene-acrylate, styrene maleic acid anhydride, polyvinylalcohol, polyvinylpyrrolidon, polyvinylformamide.
The starch may also be cross-linked fragmented starch.
The starch is preferably based on potato, maize, wheat, waxy maize, rice or tapioca. The starch may be non-ionic or ionic for example anionic, cationic or amphoteric.
In order to further improve the paper properties that have been mentioned above, e.g. printability, the starch may be additionally modified. The starch may be modified to act as cation active, anion active, amphoteric or hydrophobic. Cationic cross-linked starch may react better with dye-based inks which is anionic.
Preferably, the starch exhibits a degree of substitution of 0.01 ~ 0.30 and even more preferred 0.02 ~ 0.20.Uncharged starch too may however work according to the invention.
According to one aspect of the invention, the surface treatment composition may also comprise a minor amount of other pigments in the form of solid particles. Such pigments may e.g. be constituted by calcium carbonate, clay, silicon dioxide and/or aluminum oxide. It is however also conceivable, and in many cases preferable, that the solid content of the composition is essentially onlyconstituted by the inventive starch particles. The composition may also comprise surfactants. 11 The composition may also comprise an additive, preferably a charged additive which makes it possible to alter thecharge of the starch particle in a desired way. Theadditive may preferably be anionic or amphoteric. By theaddition of the additive to the composition comprisingstarch particles the particles will be modified. It is thuspossible to modify the starch particles in order to makemake them more compatible with the fibers The them more stable,or with other components normally used in papermaking. additive may preferably be carboxymethyl cellulose (GMC), polyvinyl alcohol, anionic galactoglucomannan, anionic starch, polyphosphoric acid, alginate polyacrylic acid, protein, anionic polyacryl amide, anionic silica, papermakers alum and polymethacrylic acid. the composition according to the invention bulk, Furthermore, also improves brightness, opacity, surface smoothnessand air resistance of a sized or coated paper orpaperboard. One reason to this is that the starch particlesof the surface treatment composition are amorphous and thatthey thereby have a much larger specific surface thanconventional pigments. The high specific surface of thecomposition is probably also the reason for the improvedprinting properties of the paper when inkjet printers areused as the absorption of ink into the paper is improveddue to an increased number capillaries having a smallerradius. This large surface also advantageously absorbs printing ink in offset printing. Furthermore, it has been observed that the starch particles, even if being nongelatinised, exhibit an advantageously sticky surface.The invention further relates to a paper or paperboard product comprising the surface treatment composition 12 described above. The paper or paperboard is especiallysuitable for printing with flexographic or digital printingtechniques, such as inkjet, electrophotography, liquidtoner or electrostatic printing. An big advantage with thecomposition according to the invention is that it can be used for both dye-based and pigment based inks. Forexample, it is suitable for hybrid printed products, inwhich one of the printing methods is based on pigmentedthe invention is also water based inkjet inks. Moreover, applicable for hybrid inks, which here relates to inks containing both dye and pigment particles.
The addition of the surface treatment composition to asurface of a paper or paperboard may take place in anyIt is for example possible to transfer blade conventional way.the composition to the surface by rod coating,spray coating or other known coating, fountain coating, coating techniques.
The salt may be incorporated in the starch particle inseveral different ways. The salt may be incorporated in thestarch particles before or after the cross-linking of thestarch. If cross-linked fragmented starch is used, the saltmay be incorporated before or after the fragmentation of the starch.
It is possible that cross-linked starch particlesalternatively cross-linked fragmented starch may be addedto a solution comprising dissolved salt. The starchparticle will swell in the solution and dissolved salt isthus absorbed and thus incorporated by the starch particles forming the particles according to the invention. 13 Another possibility for production of starch particles isduring the production of cross-linked starch, the salt canthus be added in liquid or solid state just before theextruder which is used for the production of cross~linkedthe pressure and/or temperature is starch. If necessary, raised during the extrusion, A third way to incorporate the salt in the starchparticles, is to add the salt to a starch slurry and treated in a jet cooker. In a jet cooker, the temperatureand pressure is raised by adding direct steam into thecooker. ln this way starch particles comprising salt is formed.
The invention may beneficially be used for papers ofdifferent types, such as paper for inkjet printers,copying paper, paper for laser printers or other types of paper or paperboard. envelope paper,It is also possible toadd the composition to a non-fibrous material, such as abiopolymer film preferably located on the surface of a fibrous material.
The invention is not limited to the describedembodiments, but may be varied within the scope of the claims.
Claims (11)
1. l. A surface treatment composition for paper, paperboard or other fibrous webs, characterized in that the composition comprises starch particles wherein the starch particles comprise at least one salt.
2. The composition according to claim 1, characterized in that the salt is incorporated in the starch particle.
3. The composition according to any of claims l or 2,characterized in that the at least one salt is a salt of a multivalent metal, such as a divalent or trivalent metal.
4. The composition according to any of the preceding claims, characterized in that the salt is a calcium, magnesium or aluminum salt, preferably calcium chloride or polyaluminum chloride.
5. The composition according to any of the precedingclaims characterized in that the starch is cross-linked starch.
6. The composition according to claim 5, characterized in that the starch is cross-linked by one or more compoundschosen from the group that consists of methylamine compounds, polyvalent acids, polyvalent acid esters, polyvalent acid halides, polyvalent acid anhydrides, polyaldehydes, polyepoxides, polyisocyanates, divinyl compounds, phosphoryl chloride, polyamine polyepoxide resin, 1,4-butane diolglycidyl ether, epichlorohydrin, trimetaphosphates, mixtures of anhydrides of acetic acid and two and three protonic acids, sodium hypochlorite, or mixtures thereof.
7. The composition according to any of the precedingclaims characterized in that the composition comprisesstarch particles in an amount of more than 65% by weight,and at least 10% by weight of the starch in the compositionconsists of starch particles in the entire temperature range of 20-50°C.
8. The composition according to any of the precedingclaims characterized in that the ratio between salt and starch of the composition is between 1:50 to 1:5.
9. The composition according to any of the precedingclaims characterized in that the composition comprises dissolved starch,
10. The composition according to any of the precedingclaims characterized in that the composition comprises an additive, preferably an anionic or amphoteric additive.
11.Paper or paperboard, characterized in that itcomprises a surface layer comprising the surface treatment composition according to any one of claims 1-10.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1051056A SE535500C2 (en) | 2010-10-08 | 2010-10-08 | Surface preparation composition and paper or paperboard containing a surface treatment composition |
| ES11831005T ES2751096T3 (en) | 2010-10-08 | 2011-10-04 | Paper or cardboard surface treatment composition comprising a surface treatment composition |
| EP11831005.1A EP2625337B1 (en) | 2010-10-08 | 2011-10-04 | Surface treatment composition and paper or paperboard comprising a surface treatment composition |
| BR112013008470-7A BR112013008470B1 (en) | 2010-10-08 | 2011-10-04 | surface treatment composition and paper or cardboard comprising a surface treatment composition |
| CN201180048700.2A CN103154371B (en) | 2010-10-08 | 2011-10-04 | Surface treating composition and the Paper or cardboard comprising surface treating composition |
| PCT/SE2011/051182 WO2012047162A1 (en) | 2010-10-08 | 2011-10-04 | Surface treatment composition and paper or paperboard comprising a surface treatment composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1051056A SE535500C2 (en) | 2010-10-08 | 2010-10-08 | Surface preparation composition and paper or paperboard containing a surface treatment composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1051056A1 SE1051056A1 (en) | 2012-04-09 |
| SE535500C2 true SE535500C2 (en) | 2012-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1051056A SE535500C2 (en) | 2010-10-08 | 2010-10-08 | Surface preparation composition and paper or paperboard containing a surface treatment composition |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2625337B1 (en) |
| CN (1) | CN103154371B (en) |
| BR (1) | BR112013008470B1 (en) |
| ES (1) | ES2751096T3 (en) |
| SE (1) | SE535500C2 (en) |
| WO (1) | WO2012047162A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017512164A (en) * | 2014-03-14 | 2017-05-18 | ストラ エンソ オーワイジェイ | Method for producing packaging material and packaging material produced by the method |
| ES2744564T3 (en) | 2014-03-17 | 2020-02-25 | Tetra Laval Holdings & Finance | Coating composition, printed packaging laminate, method for manufacturing the packaging laminate and packaging container |
| US9365979B2 (en) * | 2014-08-27 | 2016-06-14 | Ecolab Usa Inc. | Method of increasing paper surface strength by using polyaluminum chloride in a size press formulation containing starch |
| CN106560548B (en) * | 2016-07-21 | 2018-01-12 | 肖智基 | A kind of papermaking regenerated fiber reinforcing agent and its application method |
| SE541459C2 (en) * | 2017-05-08 | 2019-10-08 | Stora Enso Oyj | Moisture control material |
| SE543520C2 (en) * | 2018-11-14 | 2021-03-16 | Stora Enso Oyj | Surface treatment composition comprising nanocelluloose and particles comprising a salt of a multivalent metal |
| SE543902C2 (en) * | 2019-05-14 | 2021-09-21 | Stora Enso Oyj | Method for applying starch to a paper or paperboard web |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3368987A (en) * | 1964-02-17 | 1968-02-13 | Monsanto Co | Starch composition modified with half amide/half salt styrene maleic anhydride copolymers |
| US4020210A (en) * | 1975-12-15 | 1977-04-26 | Xerox Corporation | Encapsulated water paper |
| MY125712A (en) * | 1997-07-31 | 2006-08-30 | Hercules Inc | Composition and method for improved ink jet printing performance |
| JP2000127610A (en) * | 1998-10-26 | 2000-05-09 | Mitsubishi Paper Mills Ltd | Ink-jet recording sheet |
| NZ508191A (en) * | 1999-11-23 | 2002-03-28 | Nat Starch Chem Invest | A method of modulating surface sizing properties such as porosity reduction, resistance to liquid penetration and surface strength when used as surface size on paper |
| FI120318B (en) * | 2004-06-23 | 2009-09-15 | M Real Oyj | Silicon containing starch composites, process for making them and use in making paper and paperboard |
| US20060254738A1 (en) * | 2005-05-16 | 2006-11-16 | Anderson Kevin R | Cationic crosslinked starch containing compositions and use thereof |
| ATE518661T1 (en) * | 2007-03-29 | 2011-08-15 | Jujo Paper Co Ltd | THERMAL RECORDING MATERIAL |
-
2010
- 2010-10-08 SE SE1051056A patent/SE535500C2/en unknown
-
2011
- 2011-10-04 WO PCT/SE2011/051182 patent/WO2012047162A1/en active Application Filing
- 2011-10-04 EP EP11831005.1A patent/EP2625337B1/en active Active
- 2011-10-04 CN CN201180048700.2A patent/CN103154371B/en active Active
- 2011-10-04 ES ES11831005T patent/ES2751096T3/en active Active
- 2011-10-04 BR BR112013008470-7A patent/BR112013008470B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN103154371B (en) | 2016-02-17 |
| CN103154371A (en) | 2013-06-12 |
| SE1051056A1 (en) | 2012-04-09 |
| EP2625337B1 (en) | 2019-07-17 |
| EP2625337A4 (en) | 2017-03-08 |
| BR112013008470B1 (en) | 2020-07-21 |
| ES2751096T3 (en) | 2020-03-30 |
| EP2625337A1 (en) | 2013-08-14 |
| WO2012047162A1 (en) | 2012-04-12 |
| BR112013008470A2 (en) | 2016-08-09 |
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