EP2274485B2 - Papierschicht zum herstellen eines flächigen, bedruckten oder bedruckbaren bauteils - Google Patents

Papierschicht zum herstellen eines flächigen, bedruckten oder bedruckbaren bauteils Download PDF

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Publication number
EP2274485B2
EP2274485B2 EP09707694.7A EP09707694A EP2274485B2 EP 2274485 B2 EP2274485 B2 EP 2274485B2 EP 09707694 A EP09707694 A EP 09707694A EP 2274485 B2 EP2274485 B2 EP 2274485B2
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EP
European Patent Office
Prior art keywords
paper layer
paper
resin
component
printed
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Application number
EP09707694.7A
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German (de)
English (en)
French (fr)
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EP2274485A1 (de
EP2274485B1 (de
Inventor
Udo Tünte
Frank Petersen
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Flooring Industries Ltd SARL
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Flooring Industries Ltd SARL
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Publication date
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Application filed by Flooring Industries Ltd SARL filed Critical Flooring Industries Ltd SARL
Priority to PL09707694T priority Critical patent/PL2274485T5/pl
Publication of EP2274485A1 publication Critical patent/EP2274485A1/de
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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
    • B41M5/50—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • 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
    • 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
    • D21H19/72—Coated paper characterised by the paper substrate
    • D21H19/76—Coated paper characterised by the paper substrate the substrate having specific absorbent properties
    • 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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures

Definitions

  • the invention relates to a paper layer with the preamble features of patent claim 1.
  • the present invention relates to a flat, printed or printable component with a paper layer of the aforementioned type and a method for producing such a component.
  • Paper layers for producing flat, printed or printable components for floor, wall, ceiling or furniture applications are also known from practice.
  • an ink-receiving layer is applied to the fiber structure of the actual paper layer. Investigations which have been carried out by the applicant have shown that the particles of the ink-receiving layer are on average a few micrometers.
  • the ink-receiving layer which has silicon dioxide and titanium dioxide as its main components, is applied over the entire surface of the top of the paper structure and rests on it, completely covering and hiding the paper structure.
  • the ink-receiving layer although it engages superficially in the fiber structure, is essentially arranged above the fiber structure and covers and thus closes the fibers and the spaces between the fibers.
  • the known paper produces an essentially closed, uniform surface, which leads to a very good print result.
  • This publication relates to a method and a device for producing a paper web printable by means of an inkjet printing process, which paper web is then applied to plates or panels.
  • the aim here is to provide an inkjet printing process, whereby the print result on the surface of the objects to be printed corresponds to the highest quality requirements in terms of appearance.
  • a paper web that is absorbent for liquid synthetic resin along its entire thickness is soaked from the underside with liquid synthetic resin in such a way that the synthetic resin does not completely penetrate the paper web, so that the other side of the paper web is at least essentially free of synthetic resin.
  • the from the EP 1 749 676 A1 known paper web has an upper-side, essentially resin-free area which makes up about 50% of the thickness of the paper web.
  • the object of the present invention is to provide a paper layer of the type mentioned at the outset, in which, on the one hand, a very good print result is possible and, on the other hand, a good connection to the base body of a component and possibly to a protective layer on the top is ensured.
  • an ink-absorbing compound to be provided at least on the upper side of the fiber structure, which at least essentially encases the upper-side area of the fibers, and that open spaces in the coated fiber structure remain on the upper side of the paper layer, i.e. not covered by the ink-absorbing compound are.
  • a plurality of open spaces with a length of greater than 20 ⁇ m and / or an opening area of greater than 250 ⁇ m 2 are provided on the upper side of the paper layer.
  • the ink absorbing mass has particles with an average diameter of 50 nm to 400 nm and the weight per unit area of the ink absorbing mass is between 0.5 g / m 2 and 20 g / m 2 .
  • the invention is based, first of all, on the basic idea of providing an ink absorbing composition as a so-called pigment coating to which the printing ink or ink is applied. At the same time it is the case that the ink absorbing compound does not provide a quasi-closed, flat surface.
  • the fibers are sheathed or when dye absorbing particles in the nano range are used, uncovered, outwardly open spaces remain in the fiber structure, which ensure that the paper layer is sufficiently resinified. If the upper side of the fiber structure is only partially covered with the dye-absorbing compound, free areas remain in any case, which also ensure the necessary resin build-up.
  • the solution according to the invention is initially rejected by the applicant because it was feared that the paper layer with the incorporated or applied ink-absorbing mass, in which the structure caused by the cellulose fibers is ultimately still recognizable despite the color-absorbing mass, cannot achieve an adequate print result.
  • the invention does not result in a closed, essentially flat printing surface as in the prior art. In practical tests which were then carried out, however, it was found that the printing result that can be achieved with the paper according to the invention does not differ, or only insignificantly, from the printing result that is achieved with the known paper mentioned above.
  • the invention also offers the possibility that the paper layer can be printed with the ink absorbing material both before and after it is applied to the base body of a component.
  • the paper layer can be printed with the ink absorbing material both before and after it is applied to the base body of a component.
  • the printed paper layer can then be pressed with the base body of the component under the influence of pressure and heat, the resin first melting and then curing immediately.
  • the particles of the ink absorption compound should preferably have an average Have diameters between 100 nm and 300 nm and in particular between 150 nm and 250 nm. Very good tests have been achieved with particle sizes in the range of around 200 nm in diameter.
  • the paper layer according to the invention has an excellent resin coating, regardless of whether the resin coating is carried out from above or from below.
  • the aforementioned dimensions of the interspaces are not only provided "sporadically”, but if they are located on the entire upper side of the paper layer. It has been found that at least one intermediate space, preferably more than three and in particular more than ten intermediate spaces of the aforementioned type, should be provided on the upper side per unit area [nm 2 ].
  • the weight per unit area of the dye absorbing compound is between 0.5 g / m 2 and 20 g / m 2 .
  • a significantly lower proportion of ink absorbing compound is used than in the prior art. This has a considerable effect on the acquisition costs of the paper layer.
  • the costs of the paper according to the invention are lower by a factor of 3 than that of the paper known from practice mentioned at the beginning.
  • the ink absorbing compound also has titanium dioxide, barium sulfate and silicates, in particular as main components.
  • the dye-absorbing compound is basic. It has been found that the resin to be applied is generally basic, i.e. has a pH value greater than 7. It has also been found that the resin solidifies more easily or faster in an acidic environment than in a basic environment. In order to ensure that the resin is well resinated through, the ink absorbing compound and, if appropriate, the paper of the fiber structure should be basic.
  • the paper or the fiber structure should be a decorative paper that has a weight per unit area without resin content but with an ink absorbing mass between 30 g / m 2 and 300 g / m 2 , preferably between 50 g / m 2 and 120 g / m 2 and in particular about 70 g / m 2 .
  • the paper layer according to the invention with the ink-absorbing compound embedded in the fiber structure can in principle have no resin before the printing and only be resinated after the printing. In principle, however, it is also possible for the paper layer to be resinated in a defined manner from the underside before printing in such a way that the upper area of the fiber structure with little or no resin content extends preferably over a maximum of 30% of the thickness of the fiber structure. In particular, the upper paper layer area extends over a maximum of only 20% of the thickness of the paper layer and more preferably over a maximum of 10% of the thickness of the paper layer, each individual value between 0.1% of the thickness of the paper layer and 30% of the thickness of the paper layer being possible and expressly provided as being essential to the invention.
  • the aforementioned values of the thickness of the upper paper layer area relate to the not yet pressed state of the paper layer, that is, when the paper layer has not yet been applied to the base body of the component under the influence of pressure and / or heat.
  • an upper protective layer which is also resinified, is applied to a printed component, at least if it is used in the floor area, under the influence of pressure and heat.
  • the one from the EP 1 749 676 A1 known component after the protective layer has been pressed, a substantially resin-free layer area remains between the resin of the protective layer and the resin of the paper layer. Since the resin of the protective layer does not bond or does not bond sufficiently with that of the paper layer, this can, as already stated at the outset, lead to the protective layer becoming detached.
  • the present invention it has been recognized that a sufficient connection of the resin of the paper layer with the protective layer can be ensured by the comparatively large spaces between the fibers.
  • the amount of resin added to the underside is controlled in a process-technically defined manner as a function of the porosity and thus the absorbency of the paper layer and the viscosity of the resin. If the resin is applied, for example, via a roller that runs through an immersion bath, with the underside of the paper layer being guided over a roller, the immersion depth of the roller, the surface properties of the roller, the diameter of the roller and the contact pressure play a role as further process parameters the paper layer and the roller and the transport speed of the paper layer matter. It goes without saying that the resin can also be applied to the paper layer in another way, for example by nozzle application.
  • the paper layer In order to achieve a defined layer thickness of the upper paper layer area, it is also advisable for the paper layer to be impregnated from the top in a defined manner with a barrier liquid that does not mix with the resin, such that a preferably more than 30% of the thickness of the paper layer results Forms a barrier layer for the resin.
  • the application of the barrier liquid can take place in the same way as the application of the resin or in principle in a different manner. After the paper layer has been resinified, the barrier liquid is evaporated. The space originally occupied by the barrier liquid then forms the upper paper layer area. However, it goes without saying that it is basically also possible to add the barrier liquid in such a way that ultimately no defined barrier layer is created.
  • the barrier liquid contains the ink-absorbing mass according to the invention, which is deposited in the upper paper layer area after evaporation, so that the sheathing or coating of the fibers is then obtained.
  • the ink-absorbing mass can be applied in connection with or following the impregnation with barrier liquid.
  • the ink absorbing mass can be applied separately or together with the barrier liquid by rolling, spraying, knife coating, blade coating, air brushing, cast coating processes, film pressing, linen pressing, curtain casting processes and / or by slot nozzle application.
  • the resin coating can be carried out with just one resin or, if necessary, in several resin coating steps also with different resins in order to achieve certain properties of the paper layer.
  • the paper layer can be dried and then the ink absorbing compound can be applied. This can be followed by drying again.
  • a so-called wet / wet treatment takes place.
  • the ink absorbing material is applied before the resin has completely dried, i.e. is still in a liquid or gelled or gelled state. This is followed by the joint drying of the resin-coated paper layer provided with the ink-absorbing material.
  • the weight per unit area of the resin content in the paper according to the invention should be between 5 g / m 2 and 300 g / m 2 , preferably between 20 g / m 2 and 100 g / m 2 in order to ensure a good connection between the paper layer and the base body of the component and, if necessary, the protective layer to be provided.
  • the resin itself is preferred a reactivatable resin, in particular an aminoplast such as a melamine resin or a urea resin.
  • an aminoplast such as a melamine resin or a urea resin.
  • resins from the group of diallyl phthalates, epoxy resins, urea-formaldehyde resins, hamic acid-acetylic acid ester copolyesters, melamine-formaldehyde resins, melamine-phenol-formaldehyde resins, phenol-formaldehyde resins, poly (meth) acrylates or unsaturated polyester Resins used.
  • the paper layer in order to achieve good printing results, it is advantageous for the paper layer to be heated or warmed up before, during and / or after the application of the ink layer.
  • corresponding heating devices can be provided which heat the paper layer or the ink-absorbing mass. This can be done, for example, using an appropriate fan.
  • infrared, in particular NIR heating devices and / or microwave heating devices can be provided, which act directly on the water content in the paint layer. The heating or warming can, as stated above, take place before, during and / or after the printing.
  • one or more heaters can be provided, the heating path not only being provided at certain points, but also extending over a larger area, for example between 0 and 5 m and in particular between 0 and 2 m before and / or after the respective pressure point.
  • the temperature of these surfaces should advantageously be between 30 ° C. and 40 ° C., preferably around 35 ° C., during the preheating and / or post-heating.
  • the aforementioned heating leads to an immediate drying of the ink layer on the ink-receiving layer as soon as the printing ink or ink is released by the print head, as well as drying of the fiber structure. It should be pointed out in the present case that the aforementioned heating or warming is also of independent inventive importance, that is to say independently of the paper layer according to the invention.
  • the paper layer After drying, the paper layer is either cut on sheets or rolled up as a continuous web. In principle, with the method according to the invention, it is also possible for printing to take place before cutting / rolling up.
  • the present invention further relates to a printed or printable, flat component, in particular for floor, wall, ceiling and / or furniture applications, with a flat base body and with a printable or printed paper layer applied to the base body according to one of the preceding Expectations.
  • the paper layer according to the invention is basically printed before further processing and only then applied to the base body of the component.
  • the paper according to the invention is therefore not restricted to a specific type of production.
  • the base body has been coated directly with the paper layer in a short-cycle press process.
  • the resin-coated paper layer hardens and melts directly on the base plate of a corresponding press under pressure and heat.
  • the base body in the short-cycle pressing process, it is essential that the base body, as a carrier plate, should not or only insignificantly yield to the pressing pressure, which is usually between 200 and 650 N / cm 2 .
  • the base body and the paper layers to be applied must not touch the hot press plates during entry and exit.
  • the temperature during pressing is generally between 80 ° C and 250 ° C, preferably between 140 ° C and 200 ° C. The respective temperature during pressing depends on the reactivation temperature of the resin.
  • the critical idle time i.e. the time from the first contact of the resin-coated paper layer with the press plate until the necessary press pressure is reached, must be observed. The critical idle time should be extremely short.
  • the printing of the paper layer is preferably carried out by means of a digital printing process, in particular an inkjet printing process. So-called inkjet digital printers are then preferably used, with which excellent printing results can be achieved.
  • inkjet digital printers are then preferably used, with which excellent printing results can be achieved.
  • decors can be designed in a simple manner with the aid of computers and can be printed on at short notice.
  • the paper layer is only printed after it has been resinified.
  • Solvent-based inks and / or water-based inks are preferably used for printing.
  • UV-based ink systems can also be used.
  • these have the disadvantage of developing an odor.
  • problems can arise during pressing.
  • the present invention also relates to a method for producing a printed or printable flat component of the aforementioned type, wherein the procedural features result from the above-mentioned statements without further ado.
  • range specifications and intervals include all individual values and intermediate intervals or intermediate range specifications within the range specifications and intervals, including in the decimal range, and are regarded as essential to the invention, without any explicit mention of individual values or intermediate intervals or intermediate range information is required.
  • a paper layer 1 is shown schematically.
  • the paper layer 1 consists of a conventional absorbent or liquid-absorbing paper material, in the present case a decorative paper.
  • the decor paper has one in the Fig. 4 , 6 and 8th recognizable fiber structure, which is made up of a large number of fibers, in this case cellulose fibers.
  • the paper layer 1 as such can be part of a roll or a sheet.
  • the paper layer 1 has an upper side 2 for later printing and an underside 3 which is intended to be placed on the base body 4 of a component 5.
  • the component 5 can be any flat, printed or printable element that can be used in the floor, wall, ceiling and / or furniture area.
  • the component 5 is a plate or a panel.
  • FIG. 4 , 6 and 8th show only a view of the top of the paper layer 1, it emerges from these representations that the paper layer 1 has a multiplicity of fibers 6, which ultimately form a three-dimensional fiber structure 7. There are spaces 8 between the individual fibers 6.
  • an ink-absorbing compound 9 is provided on the upper side in the fiber structure 7, which ultimately forms an ink-absorbing layer which is incorporated in the fiber structure 7 at least essentially on the upper side.
  • the ink absorbing compound 9 does not protrude or only slightly protrudes over the fiber structure 7 towards the top. Since the ink absorbing compound 9 is very fine-grained, namely has particles with an average diameter in the nano range, the ink absorbing compound 9 encases the fibers 6 of the upper area of the fiber structure 7. Due to the fine grain of the particles of the ink absorbing compound 9, the coated fiber structure 7 remains on the upper side the top side 2 of the paper layer 1 also forms open spaces 8. This results in particular from the Fig. 4 , 6 and 8th which also make it clear that the ink absorbing compound 9 does not lie over the upper side of the fiber structure 7 in such a way that the fibers 6 can no longer be recognized as such. The fibers 6 remain at least partially uncovered.
  • the Fig. 4 , 6 and 8th make it clear that despite the color-absorbing compound 9 on the top, the fiber structure 7 is at least partially still recognizable and open spaces 8 remain between the fibers 6.
  • This feature ultimately represents the decisive difference to the prior art, as can be seen from a comparison with the Fig. 5 , 7th and 9 results.
  • the two aforementioned figures show that the fiber structure of the known paper layer can no longer be seen there.
  • the top of the paper layer is formed by a coarse-grained ink-receiving layer. The average diameter of these particles is a few micrometers.
  • the ink-absorbing mass is ultimately due to the comparatively coarse particles on the fiber structure, covers it and covers it completely so much that it is no longer recognizable. As a result, no upwardly open spaces remain between the fibers.
  • the weight per unit area of the ink absorbing compound 9 is comparatively low and in the present case is around 5 g / m 2 . With the small particle size, which is around 200 nm on average, such a low weight per unit area is sufficient to encase at least the fibers 6 in the upper region of the fiber structure 7 and at the same time leave a sufficient number of spaces 8 open. It should be noted, however, that, deviating from the representation according to Fig. 1 In principle, it is also possible for the ink absorbing compound 9 to extend into the central area, the lower area or even to the underside 3 of the fiber structure 7. In any case, however, it is necessary for the necessary resin build-up that the previously described open spaces are present in each plane of the fiber structure 7.
  • the ink absorbing compound 9 itself has titanium dioxide, barium sulfate and silicates as main components and is otherwise basic.
  • the fiber structure 7 of the paper layer 1 is formed by a decorative paper which has a weight per unit area, as shown in FIG Fig. 1 shown, that is, without resin content but with ink absorption compound 9, of about 70 g / m 2 .
  • the decorative paper can also have a very much smaller or a very much larger basis weight.
  • the paper layer 1 shown is unprinted and without resin.
  • the paper layer 1 is first of all printed, that is to say provided with a printing layer 10 and then treated with resin. This state is in Fig. 2 shown schematically, the paper layer 1 being completely covered with resin over its entire thickness.
  • the resin concentration can in principle be the same over the thickness of the paper layer 1 or it can also vary from one side to the other or from both sides towards the center.
  • the resin which is preferably a melamine resin, or its viscosity is matched to the type of paper material of the paper layer 1 and also to the resin coating process in such a way that the entire thickness of the paper layer 1 is completely resinated is.
  • the weight per unit area of the resin component is around 80 g / m 2 in the present case.
  • the paper layer 1 can also be resinified in a defined manner from the underside 3 before printing, so that the upper area of the fiber structure 7 with little or no resin content extends over a predetermined thickness, preferably over a maximum of 30% of the thickness of the fiber structure 1 extends.
  • the printing or color layer 10 has been applied in the present case by means of an inkjet digital printer (not shown), that is to say by means of the inkjet printing process, although other printing processes, in particular gravure printing, are also possible. Both solvent-based and water-based inks can be used as printing inks.
  • the component 5 is shown in detail, which has the already mentioned flat base body 4, in particular with a rectangular shape.
  • the base body 4 can be constructed in one or more layers and in particular consist of wood and / or plastic materials.
  • the component 5 can be wood-based panels such as MDF, HDF or DKS panels or so-called HPL (High Pressure Laminate) panels.
  • the component 5 can, however, also be thicker foils, cardboard or plasterboard.
  • the in Fig. 3 The component 5 shown is applied to the top side 11 of the base body 4, the printed paper layer 1 and firmly connected to it. Furthermore, a protective layer 12 is applied to the printing layer 10.
  • the protective layer 12 is transparent so that the printing layer 10 can still be seen. Very hard particles, such as corundum, can be embedded in the protective layer 12.
  • the protective layer 12 is generally implemented in components 5 which are used in the floor area. In principle, however, the protective layer 12 can also be dispensed with. This applies in particular to wall and ceiling applications as well as furniture elements.
  • Fig. 10 the method according to the invention is shown schematically in a short-cycle pressing process.
  • the process begins with the known production of the paper in a paper machine, which is shown in process step A.
  • the paper layer 1 is still part of a quasi-infinite paper web.
  • step B the papermaking is followed by a surface treatment by smoothing the upper side 2 in order to make the surface even and, if necessary, a subsequent fine roughening of the previously smoothed surface. Then the Ink-absorbing compound 9 is applied or introduced onto or into the upper side 2.
  • the printing and thus the application of the printing layer 10 takes place in process step C.
  • the printing is carried out in the inkjet printing process using an inkjet digital printer.
  • the paper layer 1 can still be part of a paper web or already part of a sheet cut off from the paper web. Cutting on arches can also be done at a later point.
  • part of process step C is also the heating of the paper layer before, during and / or after the application of the color layer.
  • the paper layer 1 is preheated between 30.degree. C. and 40.degree. C., preferably at about 35.degree. C., so that the color already hits the preheated color layer during printing, which supports the drying.
  • heating takes place via a radiant heater at 42 ° C., which is directed onto the area of the paper layer 1 that is currently being printed.
  • post-heating also takes place between 30 ° C and 40 ° C via a third heating device (for example via a heated support plate).
  • process step D the printed paper layer 1 is completely resinified, so that the state according to FIG Fig. 2 results.
  • step E the paper layer 1 is pressed with the base body 4.
  • the protective layer 12 is also pressed in a corresponding pressing device.
  • the resin in the paper layer 1 and the resin in the protective layer 12 melt and harden immediately during the pressing process, so that on the one hand there is a firm connection between the paper layer 1 and the base body 4 and on the other hand a firm connection the protective layer 12 on the paper layer 1 results. Due to the resin build-up on the paper layer 1, there is also such a firm connection between all the layer materials during pressing that there is no need to fear unintentional detachment.
  • Fig. 11 an alternative embodiment of the method is shown schematically.
  • Process steps a and b correspond to process steps A and B mentioned above for paper production and the application of the ink absorbing compound.
  • process step c with the paper web being partially treated from its underside.
  • the partial resin coating takes place in a defined manner in such a way that the upper area of the fiber structure 7, but in any case the upper side of the fiber structure 7 and the ink-absorbing compound 9 located there, remain at least essentially free of resin.
  • the paper layer 1 which is then already cut into sheets, is applied to the base body 4 by pressing in the mentioned pressing device.
  • the paper layer 1 is still unprinted and also has no protective layer 12 on the top.
  • the unprinted component 5 is now also printed in process step e using the inkjet printing process.
  • the applied printing layer 10 is heated parallel to this or immediately thereafter.
  • the paper layer 1 can be preheated.
  • the final pressing of the protective layer 12 in the pressing device in method step f in order to connect the protective layer 12 to the paper layer 1 after the resin in the protective layer 12 has melted and hardened.

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  • Laminated Bodies (AREA)
  • Ink Jet (AREA)
EP09707694.7A 2008-02-07 2009-01-27 Papierschicht zum herstellen eines flächigen, bedruckten oder bedruckbaren bauteils Active EP2274485B2 (de)

Priority Applications (1)

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DE102008008292A DE102008008292A1 (de) 2008-02-07 2008-02-07 Papierschicht zum Herstellen eines flächigen, bedruckten oder bedruckbaren Bauteils
PCT/EP2009/000488 WO2009097986A1 (de) 2008-02-07 2009-01-27 Papierschicht zum herstellen eines flächigen, bedruckten oder bedruckbaren bauteils

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Also Published As

Publication number Publication date
ES2404075T3 (es) 2013-05-23
EP2274485A1 (de) 2011-01-19
DE102008008292A1 (de) 2009-08-13
EP2274485B1 (de) 2013-03-27
ES2404075T5 (es) 2021-06-29
PL2274485T5 (pl) 2021-05-17
WO2009097986A1 (de) 2009-08-13
PL2274485T3 (pl) 2013-06-28

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