EP1664432A1 - Verfahren und vorrichtung zur herstellung eines dekorpapiers sowie dessen verwendung - Google Patents
Verfahren und vorrichtung zur herstellung eines dekorpapiers sowie dessen verwendungInfo
- Publication number
- EP1664432A1 EP1664432A1 EP04766772A EP04766772A EP1664432A1 EP 1664432 A1 EP1664432 A1 EP 1664432A1 EP 04766772 A EP04766772 A EP 04766772A EP 04766772 A EP04766772 A EP 04766772A EP 1664432 A1 EP1664432 A1 EP 1664432A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- curtain
- paper
- pigments
- pigment
- 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 74
- 238000000576 coating method Methods 0.000 claims abstract description 132
- 239000011248 coating agent Substances 0.000 claims abstract description 131
- 239000000049 pigment Substances 0.000 claims abstract description 89
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000007766 curtain coating Methods 0.000 claims abstract description 26
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000000123 paper Substances 0.000 claims description 116
- 239000011230 binding agent Substances 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 14
- 239000004606 Fillers/Extenders Substances 0.000 claims description 8
- 229920006322 acrylamide copolymer Polymers 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 6
- 235000013539 calcium stearate Nutrition 0.000 claims description 6
- 239000008116 calcium stearate Substances 0.000 claims description 6
- 239000000391 magnesium silicate Substances 0.000 claims description 6
- -1 retention aids Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005909 Kieselgur Substances 0.000 claims description 2
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 claims description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- 239000013543 active substance Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000013980 iron oxide Nutrition 0.000 claims description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 claims description 2
- 235000012243 magnesium silicates Nutrition 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000012860 organic pigment Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- KMNONFBDPKFXOA-UHFFFAOYSA-N prop-2-enamide;styrene Chemical compound NC(=O)C=C.C=CC1=CC=CC=C1 KMNONFBDPKFXOA-UHFFFAOYSA-N 0.000 claims description 2
- 125000005624 silicic acid group Chemical class 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 235000012217 sodium aluminium silicate Nutrition 0.000 claims description 2
- 239000000429 sodium aluminium silicate Substances 0.000 claims description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 230000001680 brushing effect Effects 0.000 claims 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 5
- 238000009500 colour coating Methods 0.000 abstract 3
- 235000010215 titanium dioxide Nutrition 0.000 description 20
- 239000007900 aqueous suspension Substances 0.000 description 12
- 239000012463 white pigment Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- 238000001035 drying Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000005470 impregnation Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 6
- 238000011049 filling Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 229920000058 polyacrylate Polymers 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- NOLXQSVNNIIHMV-UHFFFAOYSA-L disodium;2,2-diethyl-3-hexyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCC(C([O-])=O)(S(O)(=O)=O)C(CC)(CC)C([O-])=O NOLXQSVNNIIHMV-UHFFFAOYSA-L 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 4
- 235000019792 magnesium silicate Nutrition 0.000 description 4
- 229910052919 magnesium silicate Inorganic materials 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 3
- 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 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 244000166124 Eucalyptus globulus Species 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- 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 2
- 239000012223 aqueous fraction Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000012263 liquid product Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003595 mist 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000002351 wastewater 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
- 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
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
-
- 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
- D21H21/28—Colorants ; Pigments or opacifying agents
- D21H21/285—Colorants ; Pigments or opacifying agents insoluble
Definitions
- the invention relates to a method for producing a decorative paper with a pigment coating and the advantageous use of such decorative paper for decorative coating purposes.
- the invention also relates to a device for producing the decorative paper.
- the base paper had, for example, a basis weight of about 75 g / m 2 .
- the amount of titanium white pigment was adjusted to about 40% by weight.
- short fibers for example about 80%, for example eucalyptus pulp
- long fibers for example about 20%, usually softwood pulp
- an equilibrium impregnation ie, about 75 g / m 2 of impregnating resin were applied.
- the production of such decorative paper was carried out in a paper machine, but no coating device was integrated. The impregnation could be done in a variety of ways, for example, with in-line or off-line processes by soaking, dipping or coating.
- the principle of the film press job is to apply a coating of paint film to a roller.
- a doctor device often grooved or smooth rods are used. It is usually applied on both sides.
- This process has significant disadvantages, especially at high speeds due to high mechanical wear of the application, metering and leveling elements (rollers, doctor blade, metering application) due to the abrasiveness of the pigments.
- metering and leveling elements rollers, doctor blade, metering application
- by opening the nip often paint mist, filament formation (threads or thread pull) and drop formation. This results in unpleasant machine fouling, line defects and unwanted irregularities in the coating surface. It occurs the so-called "orange peel effect". These adverse effects occur especially at high order speed in appearance.
- Another disadvantage of this method is that the paper web is so strongly mecha- It is claimed that breaks often occur in the film press coating system, which has a particularly disadvantageous effect on on-line operation.
- the decorative papers produced by the known processes show no 2U peace-satisfying printability. Desirable high retention of the pigments is achieved only incompletely.
- the dry application of the coating color is about 3 to 30 g / m 2 , preferably 8 to 20 g / m 2 .
- the object of the invention has been found to remedy the above-mentioned disadvantages of the method of the prior art, in particular to ensure trouble-free operation and a reduction in the cost of raw material to a large extent exclusion of retention problems, in particular a fastest possible process control is provided.
- an aqueous coating color is applied contactlessly to a coating paper filled with pigments by means of the curtain-coating method, wherein a basis weight of about 28 to 65 g is obtained from a base paper optionally filled with pigments / m 2 and an aqueous coating of a solids content of about 30 to 70 wt .-% is assumed, and dried.
- the paper web is dried in the usual way. This is generally carried out in a temperature range of about 70 to 450 ° C, in particular from about 80 to 250 ° C, wherein in most cases contactless drying units, such as infrared and air dryers are first directed to the freshly coated web surface and then a Cylinder contact drying takes place.
- contactless drying units such as infrared and air dryers are first directed to the freshly coated web surface and then a Cylinder contact drying takes place.
- the core idea of the process according to the invention is the curtain coating process with the significant advantage that the aqueous coating color can be applied without contact to the respective base paper, in the present case optionally filled with pigments.
- the order can be advantageous in the 1: 1 ratio. This means that the amount of coating that is applied will remain on the surface of the paper without being scratched. In this case, no squeegee devices with squeegee elements, such as squeegee blades or squeegee blades, which are heavily subject to wear, need not be used. This and also due to the low circulation amount of coating color can save costs. In addition, the running properties of the decorating and / or finishing machines for the decorative paper web are improved.
- the curtain-coating process is particularly advantageous where it depends on a wear-free application of abrasive pigments.
- the curtain application unit consists essentially of a container having a slot nozzle, from which the coating compound or coating to be applied in free fall under the influence of gravity, but also under the influence of electrostatic forces on the respective paper web or their surface to be coated is applied.
- the following parameters can be varied: application quantity, web width, nozzle gap opening and selected pressure which acts, curtain fall height and, if necessary, the angle of the running paper web to the horizontal or to the curtain.
- the curtain delivered by the curtain applicator deposits on the surface of the paper web as a contour line and ensures a surface with high quality finishing.
- the aqueous coating color used can be advantageously designed as follows:
- the solids content of the coating composition is preferably about 40 to 60% by weight. If the value falls below 40 wt .-%, then the order weights to be achieved are too low.
- a value of more than 60% by weight means that, especially when this amount of the solid is substantially due to the pigment content, the continuity of the curtain film is impaired. In such cases, it can happen that the curtain tears or tears off.
- the drop height of the coating color is preferably set to about 5 to 35 cm, in particular about 8 to 20 cm. Compliance with these basic conditions means that the curtain is maintained continuously even at high speeds.
- viscosity of about 150 to 1500 mPas (Brookfield, 100 rpm, 25 ° C.), in particular about 250 to 900 mPas, surface tension between about 25 and 60 mN / m, in particular from about 27 to 40 mN / m (static ring method according to Du Noüy).
- the coating color contains processing aids, in particular surface-active substances, retention aids, surfactants, CMC, calcium stearate and / or (meth) acrylic acid / (meth) acrylamide copolymers.
- processing aids in particular surface-active substances, retention aids, surfactants, CMC, calcium stearate and / or (meth) acrylic acid / (meth) acrylamide copolymers.
- the coating color is generally incorporated into titanium dioxide as a particularly effective opacity-increasing white pigment, in particular in the form of rutile, if appropriate in admixture with anatase.
- further additives can be incorporated into the coating dye, such as, in particular, conventional inorganic extender pigments, such as clays, calcined clays, sodium aluminosilicate, aluminum oxide, silicic acids, diatomaceous earth and / or magnesium silicates, both of synthetic and natural origin.
- conventional inorganic extender pigments such as clays, calcined clays, sodium aluminosilicate, aluminum oxide, silicic acids, diatomaceous earth and / or magnesium silicates, both of synthetic and natural origin.
- light-stable, aging-resistant colorants, in particular color pigments into the coating color, in particular color pigments in the form of metal oxides, in particular iron oxides, and / or lightfast organic pigments.
- the pigments of the coating color and / or of the coating base paper fakiitatively filled with pigments have a particle size of about 0.1 to 10 ⁇ m, in particular of about 0.1 to 2.0 ⁇ m. This range guarantees optimum properties, especially with regard to a desirable degree of opacity.
- the invention is not subject to any significant restriction. It has been shown that particularly good results are achieved when the coating color is applied to a paste.
- pier or cardboard web is applied, in particular a Bekk smoothness measured according to DIN 53101, from about 150 to 2000 s, in particular about 200 to 1000 s, set.
- the coating color contains, in addition to the mentioned pigments or further additives, a binder, preferably in the form of homopolymers and / or copolymers.
- a binder preferably in the form of homopolymers and / or copolymers.
- the homopolymers and / or copolymers are based on (meth) acrylic acid, (meth) acrylamide, styrene-acrylamide, melamine resins and / or urea resins.
- the (meth) acrylic polymers guarantee a high bond strength of the finished pigment coating at a relatively low content, so that it is not torn or damaged by occasional attack forces.
- the base paper used in the context of the invention or provided with a pigment coating by the curtain-coating method may optionally be filled with pigments.
- the pigment content it is advantageous for the décor paper obtained according to the invention if the total content of pigment (in the surface coating and also in the optionally coated with pigment base paper) is less than about 60 wt .-%, in particular less than about 40 wt .-%. If the content of pigment is too high, the desirable physical properties such as wet and dry breaking load and the like are not obtained to the extent required. The minimum content is measured by the opacity requirement.
- further materials can be incorporated into the coated base paper according to the invention, such as synthetic fibers for dimensional stabilization in addition to natural fibers. It is preferred if the long fiber content to about 0 to 50%, in particular about 5 to 50%, and the short fiber content is set to about 50 to 100%, in particular about 50 to 95%.
- the white decorative paper it is particularly advantageous if the main components of the base paper represent a pulp mixture of eucalyptus short fibers and softwood long fibers, the white pigment is titanium dioxide. There may be small amounts of color pigments for shading next to also minor amounts of kaolin. Another component is preferably a wet strength agent, which is to ensure the fiber cohesion in the subsequent impregnation process.
- the coating base paper is not provided with a pigment coating in the completely dry state by the curtain coating method.
- the moisture content of the coating base paper to be coated is between about 1 and 15% by weight, in particular about 2 to 8% by weight. Too dry a base paper would disadvantageously become electrostatically charged too highly in individual cases and impair overall production safety or running safety. Too high a moisture content of the base coating base paper would not have sufficient mechanical strength or dimensional stability.
- the coating weight of the coating is not subject to any critical limitation.
- this is at one-sided application to up to about 40 g / m 2 , in particular up to about 3O g / m 2 , and with two-sided application to each up to about 30 g / m 2 , in particular up to about 25 g / m 2 , discontinued.
- the application amount is set at one-sided application between about 5 and 20 g / m 2 and with two-sided application in each case to 5 to 12 g / m 2 .
- the coating can be operated off-line as well as on-line, it is still generally advantageous, especially for larger production facilities to run the operation on-line. In smaller installations, the off-line process can be advantageous in individual cases.
- a particular advantage of the method according to the invention is that the process is possible at very high speeds.
- the process speed can be easily adjusted to at least about 500 m / min, in particular more than 750 m / min.
- These values can be exceeded with appropriate adjustment of coating color, coating weight and base paper, for example, be more than 1750 m / min.
- the curtain of the coating color in the curtain coating process has advantageous flexibility.
- the width of the curtain can be adjusted to more than the width of the raw paper web, in particular a paper or board web.
- the disadvantages associated with the uncoated edge of the coating base paper are remedied (edge relief, corrugation, uneven application weights on the edge and the like).
- the width of the base paper web can be up to more than 10 m, which places particularly high demands on the uniformity of the application in the curtain coating process.
- the base paper web is advantageously coated with the curtain if it already has a solids content of about 65%, in particular more than 75% and preferably more than 95%. In this way, a particularly good coverage of the surface of the base paper web is ensured.
- the base paper can be used on one side smooth or preinsatinized. Here, the expert can therefore make an advantageous choice.
- the clear outlet gap width of the curtain coating head of the coating unit is expediently set to about 0.1 to 1 mm, in particular to about 0.2 to 0.6 mm. It is advantageous if the nozzle throughputs for the specific coating color are set to about 0.3 to 15.0 cm 3 / (cm working width xs), in particular about 0.5 to 5.0 cm 3 / (cm xs) , In principle, the curtain coating head can be set to a single or multiple slit.
- the papers or decorative papers with a pigment coating obtained according to the invention can advantageously be used for decoration of coating materials.
- the advantages listed below in detail in appearance It is particularly preferred if the decorative paper used is characterized by:
- a coating base paper optionally filled with pigments having a weight per unit area of about 28 to 65 g / m 2 , a content of less than about 60% by weight of pigment,
- wet strength (wet tear length), according to DIN ISO 3781 of more than 4.5 N, preferably more than 6.5 N
- a dry fracture load measured according to DIN ISO 1924-2, of more than 25 N, wherein the decorative paper has a pigment coating thickness of about 1 to 30 microns with a pigment content of about 50 to 90 wt .-% and a binder content of max. 50 wt .-%, each based on the total dry content of the coating color having.
- a decor paper which is particularly preferably used for this purpose is characterized by a dry breaking load of about 30 to 35 N, a pigment coating having a thickness of about 2 to 15 ⁇ m, in particular 3 to 10 ⁇ m, a pigment content of 70 to 85% by weight. and a binder content of max. 30% by weight.
- a particular advantage of the method according to the invention over the prior art, as already mentioned, is that the applied coating color then need not be metered or smoothed with a doctor element. In individual cases, it is expedient to apply two or more strokes successively on the base paper. It is possible that the following line is applied to the dried pigment coating. But there is also the possibility of the "wet-in-wet" order. In addition, there is the possibility that a simultaneous application takes place, so with a cascade nozzle, with the same or different strokes can be applied.
- a base pressure is applied by the customers of the decor paper obtained according to the invention, ie a full-surface coloring of the surface.
- Such imprinting is costly because at least about 2 to 3 g / m 2 of job is required in a separate printing press.
- the pigment coating is formed as a partial impregnation filling.
- the pigment coating on the one hand fulfills the function of the surface coating and on the other hand as impregnation filling for the Raw paper comes to fruition.
- the decorative paper obtains a higher strength and also has a higher dimensional stability. The decorative paper is thus particularly well suited for use in the area of furniture decor as well as panels for floor laminates or tile imitations.
- the pigment coating obtained according to the invention has a particularly advantageous printability or paintability for aqueous gravure printing systems or ink-jet coating systems.
- the paints are acid-curing or UV-curable paints.
- the printing can be carried out by various printing processes, in particular based on aqueous and partially solvent-containing gravure printing systems or ink-jet systems.
- the invention also offers the following advantages:
- the curtain coating method used is advantageously controllable with regard to various properties, as already partially mentioned above, with regard to an adapted viscosity behavior, in particular extensibility, characterized by a sufficient internal cohesion, which is characterized by a pronounced thread length and Surface tension of the coating color shows.
- the usual characterization of coating colors is not sufficiently describable for the curtain coating process by known physical parameters such as surface tension, viscosity and the like.
- liquid curtain can be stabilized by a sufficient internal cohesion, otherwise he would tear off and at least cause a significant procedural disturbance.
- This property which can be described as "extensional viscosity behavior"
- the inventive method then leads to particularly desirable properties of the process product or can solve the stated problem particularly favorable when the thread length between 70 and 130 cm, in particular between 80 and 120 cm, preferably between 90 and 110 cm.
- the application of an aqueous coating color took place by means of the curtain coating process.
- the clear exit gap width of the curtain coating head was 0.3 mm (single brush).
- the curtain coating head was operated at a die throughput for the coating color of about 0.5 cm 3 / (cm working width xs).
- the viscosity of the coating color was adjusted to 400 to 450 mPas (according to Brookfield, 100 rpm, 25 ° C.).
- the surface tension of the coating color was 35 mN / m (static ring method).
- the coating was arranged on-line in the production plant.
- the application of the coating color was carried out on a paper web of a basis weight of 50 g / m 2 (free of filler) and a Bekk smoothness, measured according to DIN 5301, of 200 s.
- the moisture content of the coating base paper was about 3% (ie dry content of 97%).
- the drop height of the coating color was set to 12 cm, the surface tension to 31 to 36 mN / m (static).
- the curtain coating process was operated at a speed of 850 m / min.
- the coating color was adjusted with respect to the thread length in the Ford cup (nozzle 4) to a range of about 85 to 125 cm. After application of the aqueous coating color, the drying process of the coated paper web takes place in a customary manner.
- 1% Na polyacrylate (30% aqueous solution, dispersant), 60% titanium dioxide (white pigment, powder), 15% magnesium silicate (extender pigment, powder), 10% plastic pigment (27% aqueous suspension, hollow spheres of polystyrene / extender pigment), 0.5% calcium stearate (50% aqueous suspension, lubricant), 0.5% polyethylene wax (30% aqueous suspension, additive), 0.5% sodium diethylhexyl sulfosuccinate (100% liquid, surfactant), 10 % Styrene acrylate copolymer (50% aqueous dispersion, binder) and 2.5% acrylic acid / acrylamide copolymer (33% aqueous dispersion, thickener / viscosity modifier)
- Recipe 2 This is a titanium white or titanium dioxide-containing surface coating with which, in particular, the opacity of the finished product and the splitting strength should be improved and the subsequent impregnation requirement should be reduced.
- a kaolin line was formed on the designated coating base paper based on the above procedure. This is intended to improve the printability and the paint level. It was used as base paper, a standard standard decorative paper, the mass in the titanium dioxide content of about 30%.
- the composition of the coating color for the surface coating was as follows:
- 1% Na polyacrylate (30% aqueous solution, dispersant), 60% aluminum silicate (white pigment, powder), 10% magnesium silicate (white pigment, powder), 10% o plastic pigment (27% aqueous suspension, hollow spheres of polystyrene, extender pigment) , 0.5% calcium stearate (50% aqueous suspension, lubricant), 0.5% polyethylene wax (30% aqueous suspension, additive), 0.5% sodium diethylhexyl sulfosuccinate (100% liquid, surfactant) , 15% styrene acrylate copolymer (50% aqueous dispersion, binder) and 2.5% acrylic acid / acrylamide copolymer (33% aqueous dispersion, thickener / viscosity regulator)
- a kaolin line was formed on the designated base paper on the basis of the above procedure. This is to improve the printability and the gap strength.
- base paper a standard standard decorative paper was used, which in the mass has a titanium dioxide content of about
- the composition of the coating color for the surface coating was as follows: 1% Na polyacrylate (30% aqueous solution, dispersant), 50%) aluminum silicate (white pigment, powder), 7% magnesium silicate (white pigment, powder), 8%> plastic pigment (27% aqueous suspension, hollow spheres of polystyrene, Extender pigment), 0.5% o calcium stearate (50% aqueous suspension, lubricant), 0.5% polyethylene wax (30% aqueous suspension, additive), 0.5%) sodium diethylhexyl sulfosuccinate (100% liquid product , Surfactant), 30%> melamine resin (binder and filling resin) and 2.5%) acrylic acid / acrylamide copolymer (33% aqueous dispersion, thickener / viscosity regulator)
- Figure 1 a schematic representation of a method according to the invention with inventive device with which or within a paper machine a decorative paper web to be produced.
- FIG. 2 a schematic diagram of the device according to the invention with a curtain applicator
- the same reference numerals are chosen for the same components.
- a pulp bin B which contains a pulp mixed with water to produce a wood-free raw paper web 1.
- the pulp in the example consists of 25% to 50% long fibers and, accordingly, 75% to 50% short fibers.
- no pigments and o-pazticians wornnden substances were added in the existing outside of the paper machine Stoffbütte B.
- the mixture of substances is thus fed to the paper machine P in a quasi-simple manner, the mixture of substances initially arriving in a headbox 2 and then being formed on screens 3 as a web. Thereafter, the dewatering takes place within the press section 4, which is followed by the drying section 5a consisting of single-row drying cylinders.
- the paper web 1 After reaching a dry content of at least 65%, in particular of at least 75%, preferably of more than 92%>, the paper web 1 is deleted.
- this paper web is suitable as decorative paper web and therefore should not be translucent, now opacticians wornnde and whitening pigments and fillers are applied to the paper web 1. This is done with formulations that have been described in the previous examples. Since the opacifying and whitening additives have an extremely abrasive effect, a contactless curtain applicator unit 7 is integrated into the paper machine as an order unit. (Also possible as an offline coater).
- the job which is referred to as a 1: 1 job, takes place without pressing pulses and without suction on the paper web 1.
- the coating film sets on the paper surface, without penetrating into the paper web and affecting their further path within the paper machine P.
- the binders contained in the application medium ensure good anchoring to the paper web.
- a targeted penetration of the application medium into the paper for example, to increase the gap strength.
- the coated paper web 1 is dried contactlessly and / or via contact release web guiding elements, such as e.g. led a so-called Air turn 8, further dried with floating dryers 9 and passed to subsequent (here double-row) drying cylinders, where in the Wegock- game 5b the finished drying of the paper web 1 takes place. Finally, the paper web is rolled up in a winding machine 10 and is available for further processing, for example printing.
- the decor paper web thus produced is characterized by high strength, ane constant and homogeneous coating and is almost opaque light.
- both sides of the web can be painted one or more times with the given parameters. That depends on the particular intended use of decorative paper.
- the coating head 7.1 of the curtain applicator 7 is shown schematically and in section.
- the spreading head extends essentially over the entire machine width or width of the paper web 1 running in the running direction L.
- a slit nozzle or an exit slit 7.3 branches off from an inner ink chamber 7.2, which is adjusted by adjusting one or both of the lips 7, 4 and 7 forming the exit slit 7.5 in its gap width s, also seen in zones across the width of the entire curtain application unit 7, is adjustable. This adjustability is indicated by the two force arrows F.
- the gap width s is between 0.1 and 0.6 mm, whereby nozzle throughputs for the coating color to about 0.3 to 15 cm 3 / cm working width and second can be achieved. From the nip, the coating color in the desired coating composition according to the examples described above emerges in the form of a curtain 8 running in the direction of gravity and deposits in a contour line 7b as a cover layer on the base paper web 1.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL04766772T PL1664432T3 (pl) | 2003-09-16 | 2004-09-13 | Sposób i urządzenie do wytwarzania papieru dekoracyjnego jak również jego zastosowanie |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003143021 DE10343021A1 (de) | 2003-09-16 | 2003-09-16 | Auftragsverfahren |
| DE200410002207 DE102004002207A1 (de) | 2004-01-15 | 2004-01-15 | Verfahren zur Herstellung eines Dekorpapiers sowie dessen Verwendung |
| PCT/EP2004/052146 WO2005028750A1 (de) | 2003-09-16 | 2004-09-13 | Verfahren und vorrichtung zur herstellung eines dekorpapiers sowie dessen verwendung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1664432A1 true EP1664432A1 (de) | 2006-06-07 |
| EP1664432B1 EP1664432B1 (de) | 2017-08-02 |
Family
ID=34379073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04766772.0A Expired - Lifetime EP1664432B1 (de) | 2003-09-16 | 2004-09-13 | Verfahren und vorrichtung zur herstellung eines dekorpapiers sowie dessen verwendung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1664432B1 (de) |
| PL (1) | PL1664432T3 (de) |
| WO (1) | WO2005028750A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013133A1 (de) | 2007-03-15 | 2008-09-18 | hülsta-werke GmbH & Co. KG | Verfahren zum Herstellen eines flächigen, bedruckten Bauteils |
| DE102010029983A1 (de) * | 2010-06-11 | 2011-12-15 | Voith Patent Gmbh | Auftragsvorrichtung |
| ES2552695T3 (es) | 2012-08-06 | 2015-12-01 | Unilin Bvba | Método para fabricar paneles con una superficie decorativa |
| EP2894047B1 (de) | 2014-01-10 | 2019-08-14 | Unilin, BVBA | Verfahren zur Herstellung von Paneelen mit dekorativer Oberfläche |
| ES2762235T3 (es) | 2014-02-06 | 2020-05-22 | Unilin Bvba | Procedimiento de fabricación de paneles de piso que tienen una superficie decorativa |
| US11220788B2 (en) | 2015-04-20 | 2022-01-11 | Kotkamills Group Oyj | Method and system for manufacturing a coated paperboard and a coated paperboard |
| WO2016200945A1 (en) * | 2015-06-09 | 2016-12-15 | Imerys Pigments, Inc. | Compositions and methods for reducing or extending titanium dioxide in paper |
| BE1025875B1 (nl) | 2018-01-04 | 2019-08-06 | Unilin Bvba | Werkwijzen voor het vervaardigen van panelen |
| PL4316671T3 (pl) * | 2022-08-01 | 2026-04-27 | Andritz Küsters Gmbh | Mechanizm do nanoszenia kurtynowego, do nanoszenia czynników nanoszonych na co najmniej jeden walec nanoszący |
| DE102023202253A1 (de) * | 2023-03-13 | 2024-09-19 | Koehler Innovation & Technology Gmbh | Chitosan-basierte Barrierebeschichtung auf Papier für die Anwendung als Lebensmittelverpackung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5820937A (en) * | 1992-06-15 | 1998-10-13 | The Mead Corporation | Process for making high abrasion overlays |
| FI961070L (fi) * | 1994-07-08 | 1996-03-07 | Sanyo Chemical Ind Ltd | Termopalautuvasti sakeutuva sideaineseos |
| DE19716466A1 (de) * | 1997-04-21 | 1998-10-22 | Bachofen & Meier Ag | Verfahren und Vorrichtung zum Auftragen von Dispersionen auf eine Materialbahn |
| DE19716647A1 (de) * | 1997-04-21 | 1998-10-22 | Jagenberg Papiertech Gmbh | Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn |
| EP1191143A1 (de) * | 2000-09-05 | 2002-03-27 | The Mead Corporation | Verfahren zur Herstellung eines zur Herstellung von dekorativen Schichtpresstoffen geeigneten, verschleissfesten Papiers |
| JP2004520496A (ja) * | 2001-02-16 | 2004-07-08 | ボイス ペ−パ− パテント ゲ−エムベ−ハ− | コート紙またはボール紙を製造するための塗布染料および方法 |
| EP1249533A1 (de) * | 2001-04-14 | 2002-10-16 | The Dow Chemical Company | Verfahren zur Herstellung von mehrschichtig beschichtetem Papier oder Pappe |
| US6702922B2 (en) * | 2002-07-17 | 2004-03-09 | Mw Custom Papers, Llc | Papers for use in decorative laminates and methods of making the same |
| AU2002335832A1 (en) * | 2002-10-15 | 2004-05-04 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
| WO2004035929A1 (en) * | 2002-10-15 | 2004-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
-
2004
- 2004-09-13 WO PCT/EP2004/052146 patent/WO2005028750A1/de not_active Ceased
- 2004-09-13 PL PL04766772T patent/PL1664432T3/pl unknown
- 2004-09-13 EP EP04766772.0A patent/EP1664432B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005028750A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005028750A1 (de) | 2005-03-31 |
| EP1664432B1 (de) | 2017-08-02 |
| PL1664432T3 (pl) | 2018-01-31 |
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