EP1755901B2 - Procede pour realiser un materiau d'enregistrement sensible a la chaleur et materiau d'enregistrement realise selon ce procede - Google Patents

Procede pour realiser un materiau d'enregistrement sensible a la chaleur et materiau d'enregistrement realise selon ce procede Download PDF

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Publication number
EP1755901B2
EP1755901B2 EP05756012.0A EP05756012A EP1755901B2 EP 1755901 B2 EP1755901 B2 EP 1755901B2 EP 05756012 A EP05756012 A EP 05756012A EP 1755901 B2 EP1755901 B2 EP 1755901B2
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EP
European Patent Office
Prior art keywords
carrier substrate
layer
suspension
thermoreactive
thermal reaction
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Expired - Lifetime
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EP05756012.0A
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German (de)
English (en)
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EP1755901B1 (fr
EP1755901A1 (fr
Inventor
Michael Boschert
Georg Streif
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Papierfabrik August Koehler SE
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Papierfabrik August Koehler SE
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Application filed by Papierfabrik August Koehler SE filed Critical Papierfabrik August Koehler SE
Publication of EP1755901A1 publication Critical patent/EP1755901A1/fr
Publication of EP1755901B1 publication Critical patent/EP1755901B1/fr
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Classifications

    • 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers

Definitions

  • the invention relates to a method for producing a heat-sensitive recording material.
  • Heat-sensitive recording materials have long been known in the art. As a rule, they have a thin, flat carrier substrate and a thin thermal reaction layer applied thereto.
  • the carrier substrate is usually paper, paper with a proportion of plastic fibers or a suitable plastic film.
  • the thin thermal reaction layer applied to the carrier substrate contains in the finest distribution a color former, for example crystal violet lactone, and a color developer, for example in the form of an acidic reaction partner.
  • the color formers and color developers are dispersed in a binder that is not or only slightly meltable when exposed to heat.
  • US 5068133 describes a method for producing a heat-sensitive recording material.
  • thermosensitive thermal reaction layer In the thermal printing process, a printhead of a thermal printer directly acts on the thermosensitive thermal reaction layer, the action of heat causing a substantial melting and diffusion of the color formers and color developers contained in the binder, which react with each other with discoloration.
  • the binder remains largely unchanged in the form of a solid matrix. The discoloration reaction between the color former and the color developer in the thermal reaction layer occurs only at the heated point within a fraction of a second.
  • a carrier substrate which has the most uniform possible distribution of the fibers, a uniform surface morphology and a uniform as possible absorbency over the surface.
  • the roughness of the surface of the support substrate to which the thermal reaction layer is applied is set in the preparation of the support substrate so that the thermal reaction layer can adhere well to the surface of the support substrate.
  • the degree of grinding of the particles forming the color formers and color developers is adjusted as finely as possible.
  • the various particles usually have a particle size of 0.5 to 3.5 microns.
  • the most uniform possible dispersion of the various particles in the subsequent thermal reaction layer forming application suspension is adjusted by suitable measures.
  • an attempt is made to reduce the occurrence of the mottling effect described above by the binder used and the binder distribution in the application suspension. It is also to be achieved by suitable methods, with which the application suspension is applied to the carrier substrate, a uniform distribution of the later resulting thermal reaction layer on the surface of the carrier substrate. For this purpose, a variety of methods are used, for example, the curtain coating method, the application with rollers or blades or the so-called doctoring. Finally, an attempt is made to achieve the most uniform possible thermal reaction layer by suitable drying methods.
  • the recording materials are additionally smoothed after drying in order to set the most homogeneous, smooth but matt surface possible.
  • calender usually a so-called Mol-calender (Matt-Online-calender) is used.
  • Mol-calender Moatt-Online-calender
  • roller pairs are also used, in which one of the two rollers is provided with a paper casing, a plastic casing or a rubber casing, while the other roller is made of, for example, surface hardened steel or chilled cast iron.
  • roller pairs are used in which the lateral surfaces of both rollers are elastically deformable.
  • the raw material used for the production of the carrier substrate for Use comes, also has a significant impact on the emergence of the mottling effect.
  • the type of cellulose, the sizing agent and the pigments of the paper raw material influence the properties of the carrier substrate produced therefrom and thus the adhesiveness and homogeneity of the thermal reaction layer applied to the carrier substrate.
  • the invention solves this problem by a method having the features of claim 1.
  • a shoe caliper value is a calender consisting of a roller usually made of surface-hardened steel and an elastic press cover serving as a contact element, which, like the roller, moves with the carrier substrate when the carrier substrate passes through the gap between the roller and the roller Pressing jacket is passed.
  • the press cover is hollow cylindrical, rotatably mounted at its open ends and is pressed by means of a so-called pressure shoe against the oppositely arranged entrained roller.
  • a hydraulic pad is usually formed between the inner peripheral surface of the press jacket and the pressure shoe, with which the press cover is pressed as uniformly as possible against the entrained roller.
  • Such shoe straighteners are usually used only in the manufacture of cardboard to prevent compression of the cardboard when smoothing, the shoe calf smooth the surfaces of the cardboard before they are provided with the outer layers to be printed.
  • thermosensitive recording material it has been found in the inventive use of the shoe caliper for thermosensitive recording material that the thermal reaction layer of smoothed by the Schuhglätttechnikes recording materials compared to recording materials that have been smoothed in a conventional manner, a much lower tendency to form the Mottling effect show how a variety of experimental series impressively proved.
  • the recording material shows a uniformly matte surface, which tends to be slightly mottling even after printing.
  • the influence of the qualities of the starting materials in particular the influence of the quality of the raw materials and the influence of the quality of the carrier substrate, on the mottling effect by using the method according to the invention significantly decreases, so that even with less high-quality starting materials high-quality recording materials can be made, where the mottling effect hardly occurs.
  • the contact pressure with which the dried carrier substrate with applied thermal reaction layer is pressed against the roller be adjusted so that a possibly occurring pre-reaction of the thermal reaction layer is negligibly small or does not occur.
  • the finished recording material after passing through the shoe calender does not show any color haze caused by pre-reactions of the color formers and color developers in the thermal reaction layer, for example a gray haze, but the recording material shows its desired base color, for example white.
  • the contact pressure is in turn chosen so high that a sufficient surface smoothness is given at the same time desired languor.
  • both the conveying speed of the carrier substrate through the shoe calender, the contact pressure with which the carrier substrate with applied thermal reaction layer is pressed against the roller, and the effective contact surface with which the carrier substrate is pressed against the roller during smoothing be coordinated so that the recording material can be manufactured with high surface quality.
  • the conveying speed, the contact pressure and the effective contact surface are preferably selected such that the thermal reaction layer on the carrier substrate is only heated to such an extent when passing through the shoe calender that no visible discoloration reactions of the thermal reaction layer occur.
  • the maximum allowable temperature in a conventional thermosensitive recording material is in a range of about 60 to 70 ° C, at which no visible discoloration reaction of the thermal reaction layer yet occurs.
  • the three process parameters conveying speed, contact pressure and effective contact surface can be set defined by the use of the discoloration reaction of the thermal reaction layer, so that a high degree of discoloration at a low degree of discoloration Quality of the recording material can be adjusted.
  • the conveying speed of the carrier substrate through the shoe calender is in a preferred variant of the method in a range of about 700 to 1750 m / min. On the one hand, it is ensured at these conveying speeds that the thermal reaction layer does not exhibit any of the previously described discoloration reactions, but that the recording material can be produced simultaneously at a sufficiently high production rate.
  • the line load of the shoe calender i.
  • the load of the carrier substrate in the shoe caliper which acts along a contact line transversely to the conveying direction of the carrier substrate, is preferably in a range of about 40 N / mm to 650 N / mm. It has been shown that most reaction partners in the thermal reaction layer are heated to such an extent only at a higher effective line load due to the high pressure forces that a discoloration reaction occurs.
  • the nip width of the shoe caliper i. the length seen in the conveying direction of the carrier substrate, along which the roller and the press cover rest on the carrier substrate, is selected such that the nip width is within a range of 30 to 50 mm for a web width of the carrier substrate of 3500 to 4500 mm.
  • the maximum acting contact pressure in the inventive method can be set comparatively low, since the recording material is smoothed over a longer period in the shoe caliper.
  • the carrier substrate with applied thermal reaction layer is dried just prior to smoothing so far that the moisture content of the carrier substrate with applied thermal reaction layer in a range of 4 to 8 wt .-% lies.
  • the application suspension forming the later thermal reaction layer is preferably applied to the carrier substrate by brushing.
  • a variety of known methods can be used, such as application of the application suspension by doctoring, with the help of rollers or rollers or with the aid of so-called Blaids.
  • Another coating method with which the application suspension can be applied to the carrier substrate is the so-called curtain coating method.
  • the carrier substrate is passed through a curtain coating device in which the application suspension is applied in the form of a curtain or veil on the surface of the carrier substrate, wherein the application suspension distributed by their surface tension evenly on the surface to be coated.
  • the carrier substrate is preferably smoothed in a defined manner before the application suspension forming the subsequent thermal reaction layer is smoothed. This gives the carrier substrate a uniformly homogenized surface on which the application suspension adheres well during application.
  • the thermal reaction layer on the planar carrier substrate, it is proposed in a particularly preferred variant of the method according to the invention to apply to the surface of the carrier substrate, to which the thermal reaction layer is to be applied, an intermediate layer in an upstream process step, with which the rough surface of the carrier substrate is equalized and homogenized.
  • the intermediate layer can be selectively adjusted so; at the same time serving as thermal insulation between the support substrate and the thermal reaction layer applied to the intermediate layer.
  • the discoloration reaction is further accelerated, since the heat applied from the thermal print head on the thermal reaction layer heat amount from the intermediate layer is reflected back into the thermal reaction layer, while possibly a small part of the amount of heat transferred transferred to the carrier substrate and is emitted to the outside thereof ,
  • the carrier substrate with applied intermediate layer is additionally smoothed, for example by means of a coating, before the application of the subsequent thermal reaction layer conventional molten calender.
  • the carrier substrate which is usually a paper or plastic web, can either be prepared beforehand and fed, for example, in the form of rolls, to the plant carrying out the process according to the invention.
  • the carrier substrate is already made from known raw materials on the same system, dried, pressed and smoothed and then fed to the corresponding facilities for applying the intermediate layer or for applying the subsequent thermal reaction layer forming application suspension.
  • the carrier substrate directly before the application of the intermediate layer or before the application of the subsequent thermal reaction layer forming application suspension, but on a separate from the process of the invention exporting plant, so that the system for applying the intermediate layer or The thermal reaction layer in its process parameters, in particular the conveying speed, can be optimally adjusted.
  • the production of the carrier substrate immediately before the application of the intermediate layer or before the application of the subsequent thermal reaction layer forming application suspension has the advantage that online the properties of the carrier substrate can be adjusted and optionally readjusted in order to obtain the highest possible heat-sensitive To produce recording material.
  • the carrier substrate used is preferably a paper web.
  • a plastic film or even a paper web with a proportion of plastic fibers as the carrier substrate.
  • thermosensitive recording material is manufactured by a method as described in the various method variants described above.
  • the thermal reaction layer of the recording material has been applied to the carrier substrate by the curtain-coating method.
  • the use of the curtain-coating method has the advantage that the recording material can be produced on the one hand with a very high production rate, while on the other hand a particularly fine and targeted dosing and training of the thermal reaction layer is possible.
  • the paper weight of the final recording material is preferably in a range of 45 to 120 g / m 2 .
  • the whiteness or the whiteness of the finished recording material is, if it is a white recording material measured in accordance with ISO 2469 in a range of 85 to 98%.
  • a paper web was produced as a carrier substrate with an intermediate layer applied thereto. Subsequently, the paper web thus produced was fed to the system for applying the thermal reaction layer.
  • the aqueous application suspension forming the later thermal reaction layer was applied to the carrier substrate by means of the curtain coating process.
  • the viscosity of the aqueous application suspension was 450 mPas (according to Brookfield, 100 rpm, 20 ° C.).
  • the surface tension of the application suspension was 46 mN / m (statistical ring method).
  • the basis weight of the paper web was 43 g / m 2 .
  • the paper web was passed at a conveying speed of 1200 m / min through the curtain coating device.
  • an aqueous coating suspension was applied in a known manner to form a thermal reaction layer having a weight of 5.8 g / m 2 (oven-dry).
  • the shoe calender was a shoe calender from Voith® in the form of a so-called shoe calender.
  • the shoe calender used in the test facility of Voith® was a calender that was equipped with a cast iron roller and a pressure shoe unit.
  • the cast iron roller had a diameter of 1067 mm.
  • the pressure shoe assembly was formed by a 1100 mm diameter elastomeric press jacket which was held on a holder with rotatable tension rings. Inside the cylindrical press jacket, a pressure shoe was arranged, which was hydraulically operated and with which a hydrostatic press zone could be formed between the press cover and the pressure shoe.
  • the coated with the thermal reaction layer paper web was then passed through the smoothing nip of the Schuhglätttechnikes, wherein the contact pressure with which the press cover pressed against the other roller was set to give a maximum line load of 600 N / mm and a minimum line load of 50 N / mm.
  • the size of the pressure shoe dependent nip width was set to 40 mm with a web width in front of the calender of 800 mm.
  • thermosensitive recording materials prepared by the method of the present invention are shown in comparison to recording materials conventionally produced.
  • optical Density 1 optical Density 2 Brightness smoothness to Bekk pre-reaction 100 1.40 0.86 92.4 157 0 101 1.41 0.92 91.5 285 0.5 102 1.38 1.00 91.1 315 1 103 1.38 1.02 90.5 336 1.5 104 1.39 1.00 90.2 346 2 105 1.39 1.02 90.0 358 2.5 201 1.40 0.90 91.8 252 202 1.40 0.93 91.7 260 0.5 203 1.40 0.93 91.1 269 0.5 204 1.39 0.94 91.1 275 0.5 205 1.40 0.94 91.2 279 1 300 1.41 0.86 93.0 167 0 301 1.40 0.90 92.4 236 0 302 1.41 0.93 92.2 267 0 303 1.40 0.94 92.0 295 0 304 1.41 0.96 92.1 311 0 305 1.40 0.96 92.0 328 0 306 1.40 0.99 91.6 334 0
  • thermosensitive recording materials which have been smoothed by various methods.
  • optical density 1 the optical density 2
  • whiteness the smoothness measured according to Bekk and the pre-reactions were listed.
  • the patterns marked 100 and 300 were not smoothed.
  • the samples indicated at 101 to 105 were smoothened in a calender with a hard roller and an elastic surface roller having a Shore hardness of 90 ° Sh (D).
  • the samples labeled 201-205 were smoothed in a two-roll calender whose surfaces were each elastic and had a Shore hardness of 90 ° Sh (D).
  • the patterns show approximately the same values for the optical density 1 and the optical density 2, which indicates how fast a thermal paper reacts.
  • the optical densities were each measured with a Macbeth D 19 C remission densitometer, which measures the contrast difference between uninteged and heat-blackened measuring surface. The higher the reading, the stronger the blackening of the thermosensitive recording material.
  • the optical density 1 gives the maximum degree of blackening, which occurs at a certain energy input (for example, obtained by a current of 1 millisecond). In order to obtain the optical density 2, the thermosensitive recording material is treated under the same conditions, but applied with half the energization time.
  • thermosensitive recording material already shows a slight discoloration reaction after passing through the calender.
  • the samples produced by the method of the present invention showed a duller appearance as compared with the comparative samples produced by the conventional methods, which remained even after undergoing a printing operation, with almost no mottling effect.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Claims (13)

  1. Procédé pour fabriquer un matériau d'enregistrement sensible à la chaleur, qui présente un substrat porteur ainsi qu'une couche de réaction thermique contenant un agent chromogène et un révélateur de couleur, en particulier pour la fabrication d'un papier thermique, une suspension d'application contenant les matériaux de départ de la couche de réaction thermique étant appliquée sur le substrat porteur dans le procédé, le substrat porteur avec la suspension d'application appliquée étant séché et étant guidé pour le lissage à travers une lisseuse, le substrat porteur séché avec la couche de réaction thermique appliquée étant guidé pour le lissage à travers une lisseuse à patin, dans laquelle le substrat porteur séché avec la couche de réaction thermique appliquée est humidifié avant le lissage dans la lisseuse à patin sur sa face arrière opposée à la couche de réaction thermique et le substrat porteur humidifié avec la couche de réaction thermique appliquée est séché une nouvelle fois avant le lissage dans la lisseuse à patin, procédé au cours duquel la vitesse de transport du substrat porteur à travers la lisseuse à patin, la pression d'appui, avec laquelle le substrat porteur séché avec la couche de réaction thermique appliquée est appuyé contre le cylindre, ainsi que la surface d'appui efficace, avec laquelle le substrat porteur est pressé lors du lissage contre le cylindre, sont choisies de telle sorte que la couche de réaction thermique se réchauffe sur le substrat porteur lors du passage dans la lisseuse à patin avec une intensité suffisante pour qu'il n'apparaisse pas de réaction de coloration visible de la couche de réaction thermique, la température maximale admissible à laquelle il n'apparaît encore aucune réaction de coloration visible de la couche de réaction thermique se situant dans une plage allant de 60 à 70°C.
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse de transport du substrat porteur se situe dans une plage allant de 700 à 1 750 m/min.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la charge linéaire de la lisseuse à patin se situe dans une plage de 40 N/mm à 650 N/mm.
  4. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la largeur de la ligne de contact entre deux rouleaux de la lisseuse à patin pour une largeur de bande du substrat porteur de 3500 à 4500 mm se situe dans une plage de 30 à 50 mm.
  5. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la teneur en humidité du substrat porteur avec la couche de réaction thermique appliquée juste avant le passage dans la lisseuse à patin se situe dans une plage de 4 à 8 % en poids.
  6. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la suspension d'application est appliquée par enduction sur le substrat porteur.
  7. Procédé selon la revendication 6, caractérisé en ce que la suspension d'application est appliquée sur le substrat porteur en utilisant le procédé de couchage par voile (Curtain-Coating).
  8. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le substrat porteur est lissé avant l'application de la suspension d'application formant la future couche de réaction thermique.
  9. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le substrat porteur est doté d'une couche intermédiaire sur laquelle la suspension d'application est appliquée.
  10. Procédé selon la revendication 9, caractérisé en ce que la couche intermédiaire est appliquée également sous forme de suspension sur le substrat porteur et le substrat porteur avec la couche intermédiaire appliquée est séché avant que la suspension d'application formant la future couche de réaction thermique soit appliquée sur la couche intermédiaire.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que le substrat porteur avec la couche intermédiaire appliquée est lissé avant l'application de la suspension d'application formant la future couche de réaction thermique.
  12. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le substrat porteur est réalisé juste avant l'application de la couche intermédiaire ou avant l'application de la suspension d'application formant la future couche de réaction thermique.
  13. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'une bande papier sert de substrat porteur.
EP05756012.0A 2004-06-17 2005-06-10 Procede pour realiser un materiau d'enregistrement sensible a la chaleur et materiau d'enregistrement realise selon ce procede Expired - Lifetime EP1755901B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004029261A DE102004029261B4 (de) 2004-06-17 2004-06-17 Verfahren zur Herstellung eines wärmeempfindlichen Aufzeichnungsmaterials sowie ein durch das Verfahren hergestelltes Aufzeichnungsmaterial
PCT/EP2005/006246 WO2005123411A1 (fr) 2004-06-17 2005-06-10 Procede pour realiser un materiau d'enregistrement sensible a la chaleur et materiau d'enregistrement realise selon ce procede

Publications (3)

Publication Number Publication Date
EP1755901A1 EP1755901A1 (fr) 2007-02-28
EP1755901B1 EP1755901B1 (fr) 2008-11-26
EP1755901B2 true EP1755901B2 (fr) 2016-11-09

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EP05756012.0A Expired - Lifetime EP1755901B2 (fr) 2004-06-17 2005-06-10 Procede pour realiser un materiau d'enregistrement sensible a la chaleur et materiau d'enregistrement realise selon ce procede

Country Status (6)

Country Link
US (1) US7833573B2 (fr)
EP (1) EP1755901B2 (fr)
AT (1) ATE415284T1 (fr)
DE (2) DE102004029261B4 (fr)
DK (1) DK1755901T4 (fr)
WO (1) WO2005123411A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102005028822A1 (de) * 2005-06-22 2007-01-04 Voith Patent Gmbh Verfahren zum Herstellen von thermosensitivem Papier
US20120203618A1 (en) * 2011-02-07 2012-08-09 Upwave, Inc. Image printing systems and methods
DE102014107567B3 (de) 2014-05-28 2015-11-05 Papierfabrik August Koehler Se Wärmeempfindliches Aufzeichnungsmaterial
DE102015104306B4 (de) 2015-03-23 2018-05-03 Papierfabrik August Koehler Se Wärmeempfindliches Aufzeichnungsmaterial
DE102016113203B4 (de) 2016-07-18 2018-05-30 Papierfabrik August Koehler Se Wärmeempfindliches aufzeichnungsmaterial

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DE10157690C1 (de) † 2001-11-24 2003-02-20 Voith Paper Patent Gmbh Verfahren und Kalander zum Glätten einer Faserstoffbahn
DE10158910A1 (de) † 2001-11-30 2003-06-18 Voith Paper Patent Gmbh Verfahren und Kalander zum Satinieren einer Papier- oder Kartonbahn
DE10241903A1 (de) † 2002-09-06 2004-03-11 Mitsubishi Hitec Paper Flensburg Gmbh Wärmeempfindliches Aufzeichnungsmaterial mit Schutzschicht, Verfahren zur Herstellung desselben und Streichmaschine zur Herstellung desselben
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DE102004011230A1 (de) † 2004-03-04 2005-09-29 Papierfabrik August Koehler Ag Verfahren zur Herstellung eines Thermopapiers
DE102004022416A1 (de) † 2004-05-06 2005-12-15 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Bahn aus Papier oder Karton

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JPH0686153B2 (ja) * 1985-04-25 1994-11-02 富士写真フイルム株式会社 感熱記録材料の製造方法
JP2528905B2 (ja) * 1987-10-27 1996-08-28 三菱製紙株式会社 感熱記録体の製造方法

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Publication number Priority date Publication date Assignee Title
DE3019591A1 (de) † 1979-05-23 1980-12-04 Kanzaki Paper Mfg Co Ltd Waermeempfindliches aufzeichnungsmaterial und seine herstellung
US4455346A (en) † 1981-06-19 1984-06-19 Fuji Photo Film Co., Ltd. Heat-sensitive recording paper
DE3920204C2 (fr) † 1988-10-31 1991-04-11 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
WO1996028609A1 (fr) † 1995-03-16 1996-09-19 Korsnäs Ab Articles en carton portant un revetement, pour des articles formes
DE19715345A1 (de) † 1997-03-27 1998-10-01 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung einer gestrichenen Warenbahn, insbesondere aus Papier oder Karton
US6332953B1 (en) † 1998-10-02 2001-12-25 International Paper Company Paper product having enhanced printing properties and related method of manufacture
DE10157690C1 (de) † 2001-11-24 2003-02-20 Voith Paper Patent Gmbh Verfahren und Kalander zum Glätten einer Faserstoffbahn
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US7833573B2 (en) 2010-11-16
WO2005123411A1 (fr) 2005-12-29
DE102004029261A1 (de) 2006-01-12
US20080269047A1 (en) 2008-10-30
EP1755901B1 (fr) 2008-11-26
EP1755901A1 (fr) 2007-02-28
ATE415284T1 (de) 2008-12-15
DE102004029261B4 (de) 2006-05-18
DK1755901T4 (da) 2017-02-20
DK1755901T3 (da) 2009-03-30
DE502005006074D1 (de) 2009-01-08

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