EP2837737B1 - Procédé de séchage de revêtements aqueux en utilisant un rayonnement NIR - Google Patents

Procédé de séchage de revêtements aqueux en utilisant un rayonnement NIR Download PDF

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Publication number
EP2837737B1
EP2837737B1 EP13180199.5A EP13180199A EP2837737B1 EP 2837737 B1 EP2837737 B1 EP 2837737B1 EP 13180199 A EP13180199 A EP 13180199A EP 2837737 B1 EP2837737 B1 EP 2837737B1
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EP
European Patent Office
Prior art keywords
nir
aqueous resin
resin application
board
resin
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.)
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Application number
EP13180199.5A
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German (de)
English (en)
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EP2837737A1 (fr
Inventor
Norbert Dr. Kalwa
Andre Denk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flooring Technologies Ltd
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Flooring Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to EP13180199.5A priority Critical patent/EP2837737B1/fr
Priority to ES13180199.5T priority patent/ES2554778T3/es
Priority to PL13180199T priority patent/PL2837737T3/pl
Publication of EP2837737A1 publication Critical patent/EP2837737A1/fr
Application granted granted Critical
Publication of EP2837737B1 publication Critical patent/EP2837737B1/fr
Active legal-status Critical Current
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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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated 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
    • 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
    • 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
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/08—Impregnated or coated fibreboard

Definitions

  • the present invention relates to a method for drying an aqueous coating applied to one side of a carrier plate according to the preamble of claim 1 and an apparatus for carrying out the method according to claim 14.
  • Wood-based panels as carrier plates or carrier materials are used in various areas of everyday life.
  • wood-based panels are used, inter alia, as floor panels, for example in the form of laminate floors, as insulation panels for indoor and outdoor use or as wall panels.
  • Such wood-based panels are usually made of wood fibers, wood chips or strands.
  • HDF (high density fiberboard) panels made of wood fibers, for example, are used with a variety of decorations and protective layers applied thereto.
  • the protective layers can be applied in a wide variety of forms, depending on the intended use and the stress in use.
  • the protective layer may in the simplest case consist of the resin supernatant of a thermosetting resin, which is applied to the paper in the production of impregnated papers, which are later pressed onto wood-based materials. This can be used in the furniture sector (horizontal or vertical applications). If a higher wear resistance is required, the resin supernatant can be increased and the antifriction resin antiperspirant minerals (corundum, glass beads, etc.) to be mixed.
  • Such a liquid resin layer is also referred to as liquid overlay ( WO 2011/076305 A1 ).
  • aqueous resin solutions are, for example, the impregnation and subsequent drying of papers, in particular decorative, overlay, kraft and countertraction papers for applications in the wood-based panel industry. These papers are impregnated with aqueous melamine, urea and phenolic resins or their mixtures and then dried in suspended dryers to defined residual moisture. Hot air not only serves as a drying medium, but also carries the impregnated paper through the drying channel. The thus pre-dried impregnated papers are processed alone or in combination with other impregnated papers in different processes to a variety of products, such as direct coated wood materials, laminates and compact disks.
  • the residual moisture is responsible in the final compression process for the flow of resins before the final cross-linking.
  • the water content or the residual moisture must move within a relatively narrow range, since otherwise quality problems occur during processing or can show up in the finished product.
  • the range for the optimum residual moisture to be achieved for impregnates or impregnated papers is a maximum of approximately 6 +/- 1%.
  • the residual moisture in the resin coating originates from the aqueous resin solution and, on the other hand, additional water forms as a result of the curing of the resin due to condensation reactions. Accordingly, the residual moisture in the resin coating is composed of free and bound water.
  • the above-described methods of drying substrates provided with aqueous resin layers each relate to methods in which papers or paper board are impregnated with resins and drying can be carried out uniformly from both sides of the web in a corresponding dryer.
  • the papers used as support materials are relatively thin and have a basis weight range between 25 and 250 g / m 2 . Thus, a uniform heating in the entire cross section of the paper carrier material is easily possible.
  • the orders of the aqueous resin solutions are in most cases below 100%. Only a few, but very thin papers, such as the overlay paper, the resin order is up to 300-400%.
  • the aqueous resin solutions used also called resin liquors usually have a water content between 40 and 60%.
  • a thin decorative paper is impregnated with an aqueous melamine-formaldehyde resin on both sides in a resin bath (full impregnation) and then from both sides with NIR radiation for a short period, for example between 0.2 to 1.5 s irradiated.
  • This irradiation causes at least partial removal of the aqueous solvent, and at least partial crosslinking of the resin.
  • the driving is done with large feed, for example, at 60 to 70 m / min.
  • the present invention is therefore based on the technical object of providing a process for drying aqueous resin applications, in particular aqueous resin solutions, on carrier plates, which enables a uniform and cost-effective drying of the aqueous coating or resin application to a predetermined end point and thus overcomes the above-mentioned deficiencies ,
  • a method for drying at least one applied on at least one side of a support plate aqueous resin application or an aqueous printing layer is provided.
  • the layer to be dried is typically a decorative surface.
  • the present process accordingly allows a significant reduction of the residual water content in the resin coating.
  • the residual moisture in a resin layer on a material plate according to a conventional drying method 9 to 11%
  • the residual moisture content could be reduced by 2 to 3%.
  • Such defined adjustable residual moisture allows an optimal flow of the resin application, so that no visually unpleasant flow disturbances occur.
  • the present method is used in particular for drying aqueous resin applications or coatings, wherein the at least one aqueous resin application is applied to one side of the carrier plate (preferably on the upper side of the carrier plate). But it is also conceivable to carry out a drying of the underside or opposite side of the carrier plate or the top and bottom of the carrier plate with the present method.
  • the opposite side of the support plate can be suitably coated with a Schmidttikung, kraft paper, sound-absorbing layers, such.
  • a Gegenzugbe Anlagenung kraft paper
  • sound-absorbing layers such as sound-absorbing layers, such.
  • crosslinked PE mats, foamed PE or PU films, etc. be provided.
  • the carrier plate provided with the aqueous coating, i.
  • the top of the carrier plate is irradiated with NIR radiation and dried. Accordingly, there is preferably no NIR irradiation from both sides of the carrier plate.
  • the at least one aqueous resin application is present as an aqueous resin solution and / or as an aqueous printing ink.
  • the aqueous resin solution or resin coating used can consist of at least one formaldehyde-containing resin, in particular a melamine-formaldehyde resin, a urea-formaldehyde resin or mixtures of the two.
  • formaldehyde-containing resin in particular a melamine-formaldehyde resin, a urea-formaldehyde resin or mixtures of the two.
  • PU polyurethane
  • the application rate of the at least one aqueous coating is between 20 and 200 g / m 2 , preferably between 50 and 180 g / m 2 , particularly preferably between 80 and 160 g / m 2 . Accordingly, application quantities are used which lead to relatively thick coatings.
  • the resin coating may have a thickness between 50 and 200 .mu.m, preferably between 50 and 150 .mu.m, particularly preferably between 50 and 100 .mu.m.
  • the solids content of the at least one aqueous resin application in particular when aqueous resin coatings or solutions are used, can be in a range between 20 and 90%, preferably 30 and 70%, particularly preferably 50 and 60%. Very particularly preferred is a solids content of 55 to 60%.
  • the thickness of the carrier plate used may be between 5 and 30 mm, preferably between 5 and 15 mm, particularly preferably between 5 and 12 mm, very particularly preferably between 5 and 10 mm.
  • the bulk density of the support plate may be between 20 and 2000 kg / m 3 , preferably between 150 and 1500 kg / m 3 , particularly preferably between 500 and 1200 kg / m 3 , very particularly preferably between 700 and 1000 kg / m 3 .
  • NIR radiation in a wavelength range between 500 and 2500 nm, preferably 700 and 2000 nm, particularly preferably 900 and 1700 nm.
  • the NIR irradiation of the at least one aqueous resin application which is used in the present process for drying an aqueous resin application on a carrier plate can be carried out for a period of 0.1 to 5 seconds, preferably 0.1 to 2 seconds, particularly preferably 0.2 to 1 sec.
  • the carrier plate provided with the aqueous resin application is fed at a feed rate of 10 to 50 m / min, preferably 15 to 30 m / min, particularly preferably 20 to 25 m / min, by means of a drying plant consisting of NIR driers and convection driers.
  • the step of NIR irradiation of the aqueous resin application is repeated, wherein the intensity of the NIR irradiation may be the same or different, respectively.
  • several NIR dryers or NIR lamps, z. B. two NIR emitters with the same or different power can be connected in series.
  • both radiators can have the same radiant power z. B. of 100%, 75% or a respective different radiant power z. B. from 100% and 75%, 100% and 50%, 100% and 125% or 100% and 0%. Any other combination of radiation power is also possible and conceivable.
  • the carrier plates used in the present drying method can be made of different materials.
  • wood-based panels also other support plates made of other materials are suitable. All these can be used as a carrier for decorative finishes in a variety of applications. Specifically, these can be particle board, fiberboard, OSB board, plywood, magnesium oxide board, wood plastic composites, plastic board, cement board, fiberboard and Be gypsum fiber boards. This list can be extended arbitrarily and has no claim to completeness.
  • the support plate may be a wood-based panel, preferably a medium density fiber (MDF), high density fiber (HDS) or chipboard (OSB) or plywood panel, a cement fiber panel and / or gypsum fiberboard, a magnesium oxide panel, a wood plastic panel and / or a plastic panel be used.
  • MDF medium density fiber
  • HDS high density fiber
  • OSB chipboard
  • plywood panel a cement fiber panel and / or gypsum fiberboard
  • magnesium oxide panel a wood plastic panel and / or a plastic panel be used.
  • the aqueous resin coating to be dried has abrasion-resistant particles, natural and / or synthetic fibers and other additives.
  • the aqueous resin coating to be dried is typically applied in the form of a solution, in the case of aqueous printing inks, as an aqueous suspension of the above-mentioned resins or printing inks with the appropriate additives to the surface of the support plate.
  • a resin layer used as a liquid overlay natural or synthetic fibers are preferably selected from the group consisting of wood fibers, cellulose fibers, partially bleached cellulose fibers, wool fibers, hemp fibers and organic or inorganic polymer fibers.
  • the abrasion-resistant particles of the coating are preferably selected from the group consisting of aluminum oxides, corundum, boron carbides, silicon dioxides, silicon carbides and glass beads, with corundum particles, glass / hollow spheres or glass particles being particularly preferred.
  • At least one additive can be added to the coating, which can be selected from the group comprising conductive substances, flame retardants or luminescent substances.
  • the conductive substances may be selected from the group comprising carbon black, carbon fibers, metal powders and nanoparticles, in particular carbon nanotubes. It is also possible to use combinations of these substances.
  • flame retardants for example, phosphates, borates, in particular ammonium polyphosphate, tris (tri-bromneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols can be added to the resin layer.
  • the luminescent substances used are preferably fluorescent and / or phosphorescent substances on an inorganic or organic basis, in particular zinc sulfide and alkaline earth aluminates.
  • the luminescent substances can be applied to the surface in geometric shapes by means of templates.
  • the aqueous resin application comprises more than one layer, at least two layers, preferably three layers.
  • the coating comprises, e.g. of three resin layers, wherein abrasion-resistant particles, for example corundum particles, are contained in one of the three resin layers, natural and / or synthetic fibers, such as cellulose fibers, are contained in a second resin layer of the three resin layers, and in a third resin layer the total of three resin layers Abrasion-resistant particles, such as glass particles, may be present again.
  • abrasion-resistant particles for example corundum particles
  • natural and / or synthetic fibers such as cellulose fibers
  • the layer of the resin layer containing corundum particles is applied to the material plate as the first layer, followed by the application of the second resin layer containing the cellulose fibers and finally the third resin layer containing glass particles is applied as the uppermost layer of the resin layer.
  • the first resin layer may contain 15 to 25 wt.%, Preferably 20 wt.% Corundum particles, the second resin layer 3 to 7 wt.%, Preferably 5 wt.% Cellulose fibers and the third resin layer 15 to 25 wt.%, Preferably 20 wt. Contain glass particles.
  • the step of the thermal treatment subsequent to the NIR irradiation of the aqueous coating in the present process can be carried out at temperatures between 150 and 220 ° C., preferably at 200 ° C.
  • the thermal treatment by circulating z. B. performed in a convection dryer.
  • the duration of the thermal treatment is in particular dependent on the feed and dimensions of the dryer between 2 to 20 seconds, preferably between 4 to 15 seconds, particularly preferably between 7 and 15 seconds.
  • dryers e.g. Convection dryer
  • duration of the thermal treatment in the various dryers may vary and may be between 7 and 15 seconds or between 4 and 8 seconds.
  • a method for producing a material plate with a liquid overlay layer is, inter alia, in WO2011 / 076305 A1 described. Following in the in the WO 2001/076305 A1 described method takes place in an embodiment of the present method, first after cleaning the surface of a wood-based panel as a support plate, applying a first top corundum particles containing resin layer on the top of the wood-based panel, drying this first resin layer by NIR / thermal treatment, then applying a second cellulose fibers contained resin layer on top of the wood-based panel, repeatedly drying the second resin layer by NIR / thermal treatment, applying a resin layer containing at least a third glass particle to the top of the wood-based panel, then drying the third resin layer by NIR / thermal treatment, and finally compressing the layer construction Pressure and temperature influence.
  • the otherwise typically provided overlay paper can be dispensed with.
  • the carrier plate provided with the now at least partially dried coating can be pressed.
  • a short-cycle press is preferably arranged after the dryer for thermal treatment in the processing direction, in which the coating z. B. resin layer or resin layers are cured under pressure and temperature. In this final compression under pressure and temperature influence melt the Resin layers on again and the cross-linking process continues. This ensures that the individual resin layers are not only crosslinked in themselves, but also with each other and so can be pressed into a laminate.
  • short-cycle presses operate, for example, at a pressure of 30 to 60 bar and a temperature of 150-220 ° C., preferably 180-200 ° C.
  • the pressing time is typically 5 to 15 seconds, preferably 6 to 12 seconds.
  • structured pressing surface can be used, by means of which additionally structures can be embossed into the coatings.
  • the present process for drying an aqueous resin application on a carrier plate is carried out in a device for the production of material plates, the at least one application device for applying the at least one aqueous coating or the aqueous resin application, at least one NIR dryer segment and at least one in Processing direction behind the at least one NIR dryer segment arranged convection dryer comprises.
  • NIR dryer segment and convection dryer preferably form a dryer unit.
  • the at least one NIR dryer or NIR dryer segment is accordingly in a production line of the at least one material plate comprising at least one application device for the aqueous coating, such.
  • the device or production line for producing the material plates comprises more than one application device, in particular three application devices. If three application devices are used to apply the aqueous resin application, the order quantities can be divided. So it is z. B. imagine that the distribution of the order quantities of the aqueous resin application using three applicators or commissioned works in a ratio of 40 - 65%: 20 - 30%: 15 - 30%. However, any other distribution of order quantities is generally conceivable and possible.
  • the device for producing the material plates also comprises more than one NIR dryer.
  • NIR dryer two series-connected NIR dryer (NIR radiator) can be used, the emitters can have either an equal radiant power or a different radiant power. So it is z. B. possible that the first NIR radiator and the second NIR radiator each with a power in a range between 50 and 100%, preferably 75 and 100% be driven. However, it is also possible and conceivable that an NIR radiator with a radiant power in a range between 50 and 100% is used, while a second NIR radiator is used in a power range between 0 and 75%, preferably 25 and 50%.
  • the device or production line likewise comprises at least one moisture detector, preferably an NIR moisture detector, which is preferably arranged downstream of the combined NIR dryer segment / convection dryer.
  • the NIR moisture detector is preferably in interaction with the dryer unit of NIR dryer segment and convection dryer.
  • an NIR dryer segment is installed before the actual circulating air dryer (circulating air, 200 ° C).
  • the NIR dryer segment consists of two different power NIR lamps that are used for drying both independently and together with variable power.
  • the aqueous synthetic resins are applied to the printed wood-based panels.
  • the resin application amounts are a total of 80 to 160 g of liquid resin / m 2 with a solids content of 55 to 60%.
  • the resin is applied in at least three commissioned works.
  • the distribution of application amounts of the aqueous resin in the three Commissioned works is in a ratio of 40-65%: 20-30%: 15-30%.
  • the feed rate of the entire system is 25 to 50 m / min, depending on the resin application rates.
  • the wood-based panels provided with the aqueous synthetic resin layer are then passed through the NIR dryer segment, with the two NIR radiators present in the NIR dryer segment each being driven with different power.
  • the irradiation power of the two NIR emitters in each variant is 100% (variant 2) or 75% each (variant 3).
  • the first radiator with a power of 100% is used, while the second radiator remains switched off and thus its power is at 0%.
  • the coated wood-based panels After passing through the NIR dryer segment with the two NIR lamps, the coated wood-based panels are introduced into a jet dryer for final thermal treatment.
  • the moisture content of the coating is determined with the aid of an NIR measuring device.
  • the dried wood-based panels are finally pressed in a short-cycle press under high pressure and high temperature (50 bar, 180 ° C) in the presence of a structured and chrome-plated steel sheet as a structural encoder on the top.
  • a pre-dried synthetic resin layer of a melamine and / or urea resin or an impregnated Gegenzugpapier is arranged to ensure the stress symmetry after compression.
  • the cured after pressing resin surface is first with a dye, for example by means of a felt-tip pen, dyed and then cleaned with a 1% surfactant solution.
  • a dye for example by means of a felt-tip pen, dyed and then cleaned with a 1% surfactant solution.
  • a part of the dye remains on the surface of the resin layer.
  • the resin surface is then visually observed using a magnifying glass or a microscope at a magnification of 10 to 20 times with respect to the resin flow.
  • the scale can range from no recognizable flow disturbance to a clearly visible flow disturbance.
  • variants according to the invention were compared with a reference sample (0 sample) (see the following table).
  • a reference sample a dried only with warm air and pressed in the short-cycle press plate.
  • the described effect of overdrying is simulated by increasing the speed of the fans in the convection dryer (variant 1).
  • the variants 2 to 4 listed in the table were carried out under the conditions of the process according to the invention, the process variants differing with regard to the radiant power of the radiators used in the NIR dryer segment.
  • Variant 2 2000 2000 1200 1200 100% 100% Good resin flow, slight crater formation 0.56
  • Variant 3 2000 2000 1200 1200 75% 75% Good resin flow, slight crater formation 0.6
  • Variant 4 2000 2000 1200 1200 100% 0% Good resin flow, low crater formation 0.29

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Claims (15)

  1. Procédé de séchage d'au moins une application aqueuse de résine appliquée sur au moins une face d'une plaque de support, le procédé comportant les étapes qui consistent à :
    i) irradier au moins une fois la ou les applications de résine aqueuse par un rayonnement dans l'infrarouge proche et
    ii) traiter ensuite thermiquement au moins une fois l'application aqueuse de résine irradiée par le rayonnement dans l'infrarouge proche.
  2. Procédé selon la revendication 1, caractérisé en ce que la ou les applications aqueuses de résine sont appliquées exclusivement sur une face de la plaque de support.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que seule la ou les faces de la plaque de support dotée d'une application aqueuse de résine est irradiée par un rayonnement dans l'infrarouge proche.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que la ou les applications aqueuses de résine présentent la forme d'une solution aqueuse de résine.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la quantité appliquée de la ou des résines aqueuses est comprise entre 20 et 200 g/m2, de préférence entre 50 et 180 g/m2 et de façon particulièrement préférable entre 80 et 160 g/m2.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'irradiation au moins une fois par un rayonnement dans l'infrarouge proche de la ou des applications aqueuses de résine sur la plaque de support a lieu pendant une durée de 0,1 à 5 s, de préférence de 0,1 à 2 s et de façon particulièrement préférable de 0,2 à 1 s.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'étape d'irradiation dans l'infrarouge proche de l'application aqueuse de résine est répétée, l'intensité du rayonnement dans l'infrarouge proche pouvant chaque fois être identique ou être différente.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la ou les plaques de support sont une plaque en matériau à base de bois, de préférence une plaque de fibres à densité moyenne (MDF), de fibres à haute densité (HDF), de copeaux grossiers (OSB) ou une plaque de bois massif, une plaque de ciment et/ou une plaque de plâtre fibreux, une plaque d'oxyde de magnésium, une plaque de bois et de matière synthétique et/ou une plaque de matière synthétique.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'application aqueuse de résine présente des particules résistant à l'usure, des fibres naturelles et/ou des fibres synthétiques et d'autres additifs.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'application aqueuse de résine comporte plus d'une couche, au moins deux couches et de préférence trois couches.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'application aqueuse de résine comporte trois couches, des particules résistant à l'usure étant incluses dans l'une des trois couches de l'application de résine, des fibres naturelles et/ou des fibres synthétiques étant incluses dans une deuxième des trois couches et des particules résistant à l'usure étant de nouveau incluses dans la troisième des trois couches.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'étape de traitement thermique qui suit l'irradiation par l'infrarouge proche est réalisée à des températures comprises entre 150 et 220°C et de préférence à 200°C.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'après l'étape de traitement thermique, les plaques de support dotées de l'application de résine sont comprimées.
  14. Dispositif en vue de la mise en oeuvre d'un procédé selon l'une des revendications précédentes, comprenant au moins un ensemble d'application qui applique la ou les applications de résine aqueuse, au moins un séchoir dans l'infrarouge proche et au moins un séchoir à convection disposé en aval du séchoir dans l'infrarouge proche dans la direction de traitement.
  15. Dispositif selon la revendication 14, caractérisé en ce qu'au moins un détecteur d'humidité et en particulier un détecteur d'humidité travaillant dans l'infrarouge proche est disposé après le ou les séchoirs dans l'infrarouge proche et le ou les séchoirs à convection dans la direction de traitement.
EP13180199.5A 2013-08-13 2013-08-13 Procédé de séchage de revêtements aqueux en utilisant un rayonnement NIR Active EP2837737B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13180199.5A EP2837737B1 (fr) 2013-08-13 2013-08-13 Procédé de séchage de revêtements aqueux en utilisant un rayonnement NIR
ES13180199.5T ES2554778T3 (es) 2013-08-13 2013-08-13 Procedimiento para el secado de recubrimientos acuosos con el uso de radiación NIR
PL13180199T PL2837737T3 (pl) 2013-08-13 2013-08-13 Sposób suszenia wodnych powłok z zastosowaniem promieniowania bliskiej podczerwieni (NIR)

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EP13180199.5A EP2837737B1 (fr) 2013-08-13 2013-08-13 Procédé de séchage de revêtements aqueux en utilisant un rayonnement NIR

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EP2837737A1 EP2837737A1 (fr) 2015-02-18
EP2837737B1 true EP2837737B1 (fr) 2015-09-16

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WO2007065222A1 (fr) 2005-12-07 2007-06-14 Depco-Trh Pty Ltd Fabrication de préimprégnés et de stratifiés
DE102007015969B4 (de) * 2007-04-03 2010-11-18 Flooring Technologies Ltd., Portico Building Verfahren zur Herstellung einer Bauplatte
PT2338693E (pt) 2009-12-23 2012-08-17 Flooring Technologies Ltd Processo e dispositivo para acabamento de uma placa de material derivado de madeira

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