EP1159114B1 - Method of producing panel-shaped products - Google Patents

Method of producing panel-shaped products Download PDF

Info

Publication number
EP1159114B1
EP1159114B1 EP00920452A EP00920452A EP1159114B1 EP 1159114 B1 EP1159114 B1 EP 1159114B1 EP 00920452 A EP00920452 A EP 00920452A EP 00920452 A EP00920452 A EP 00920452A EP 1159114 B1 EP1159114 B1 EP 1159114B1
Authority
EP
European Patent Office
Prior art keywords
cover
layer material
isocyanate
layer
coated
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.)
Expired - Lifetime
Application number
EP00920452A
Other languages
German (de)
French (fr)
Other versions
EP1159114A1 (en
Inventor
Kay-Henrik Von Der Heide
Gernot Von Haas
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.)
Dieffenbacher Schenck Panel GmbH
Original Assignee
Dieffenbacher Schenck Panel GmbH
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 Dieffenbacher Schenck Panel GmbH filed Critical Dieffenbacher Schenck Panel GmbH
Publication of EP1159114A1 publication Critical patent/EP1159114A1/en
Application granted granted Critical
Publication of EP1159114B1 publication Critical patent/EP1159114B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Definitions

  • a process for the production of multilayer board materials a mass of wood chips mixed with isocyanate, Wood fibers or from woody raw materials is from the AT-PS 270,189 known. It is also known from this publication as a binder a mixture of isocyanate and To use urea, melamine and phenol formaldehyde resin glue or, for example, the chips in the top layer with melamine resin and the chips of the middle layer with pure isocyanate solution to tie or vice versa.
  • a Mixture of the above-mentioned binders is greatly increased Resistance to moisture and a significant reduction swelling achieved when the plate products are exposed to moisture.
  • No. 5,779,955 describes a process for the production of Known plate materials, in which particles as the plate material vegetable products with isocyanate as a binder as well Water can be mixed.
  • the underlay is in front spreading the mixture covered with a liquid release agent. After the spreading process, there is also a release agent applied to the top of the deposited mixture. Subsequently the molded body is hot-pressed.
  • DE 38 20 376 also describes a process for the production of multilayer chipboard by hot pressing wood chips mixed with binders are known.
  • isocyanate in combination as a binder with formaldehyde-binding agents, such as urea or the like used.
  • Isocyanate is used as a binder in the top layers used.
  • cover layers are provided for the cover layers. These separating cover layers are bound with phenolic resin and are after Curing removed.
  • the object of the present invention is to provide a method for Manufacture from multi-layered plate-shaped products to provide lignocellulosic annual plants at especially the problem of sticking when using of isocyanate as a binder is avoided.
  • the cold stickiness present in the outer cover layers causes a surface stability of the outer layers of the scattered molding so that the multi-layer molding itself without damaging the top layer quality previously achieved over the individual transfer area in the molding strand to the press inlet can be transported.
  • the method according to the invention is based on an exemplary embodiment, which is shown in Fig. 1, described in more detail.
  • Fig. 1 is the process for producing a five-layer Chipboard shown schematically.
  • Process for producing a five-layer chipboard the raw material is processed first.
  • Raw materials become annual plants containing lignocellulose used. Belong to lignocellulosic annual plants for example grain straw, rice straw, hemp, flax, Soybean straw.
  • lignocellulosic annual plants for example grain straw, rice straw, hemp, flax, Soybean straw.
  • the grain straw is first of all in a multi-stage shredding process 1 processed.
  • the crushed straw is then in a dryer 2 to a final moisture of approx. 2 to 5% dried.
  • a subsequent sieving station 3 the dried grain straw into the fractions coarse 4, top layer material 5, middle layer material 6 and dust 7 Cut.
  • the coarse material 4 is in the crushing process 1st returned, the dust 7 is a combustion system 8th fed.
  • a subsequent second screening station 9 the cover layer material 5 in two fractions cover layer fine fraction 5a and top layer coarse fraction 5b separated.
  • the Cover layer fine fraction 5a is then in a premixer 10 with additives such as free acids or bases and addition of wetting agent and / or adhesion promoter mixed.
  • the addition of free acids or bases becomes dependent of the binder to be used.
  • the so prepared top layer fine fraction 5a is then fed to a first gluing station 12.
  • Premixer 10 and first gluing station 12 lying Conveyor routes and intermediate silos, which are in the schematic 1 are represented by arrow 11 the required dwell time for the additives to act reached.
  • the method provides that the wetting agent and / or adhesion promoter directly in front of the first gluing station 12 are added.
  • the top layer material coarse fraction 5b becomes one second gluing station 13 fed.
  • the top layer material becomes coarse fraction 5b glued with isocyanate as a binder.
  • the second gluing station 13 can in addition to the binder water or other additives can be added.
  • There is also Possibility of emulsified isocyanate in the gluing station admit.
  • Top layer material not to be divided into two fractions, but the entire top layer material depending on the degree of grinding to be prepared in such a way that gluing and pretreatment in Consistent with the procedure for Material 5a is possible.
  • the middle layer material obtained from grain straw processing 6 is fed to a third gluing station 14.
  • the middle layer material is in the third gluing station 14 6 glued with isocyanate as a binder.
  • the third gluing station 14 can in addition to the binder Water or other additives can be added. It exists also the possibility of emulsifying isocyanate in the Add gluing station. It could also be used as a binder a mixture of isocyanate and phenolic and / or aminoplast be used. If necessary, there is also a premix with aggregates required.
  • the glued fractions of a forming station 15 fed.
  • the forming station 15 from five in the transport direction of the forming belt 16 scattering units 17, 18, 19 arranged one behind the other 20, 21.
  • the direction of transport is indicated by arrow 22.
  • the first scattering unit 17 becomes the glued cover layer material Fine fraction 5a supplied as the first layer the ribbon 16 is scattered.
  • the following second Scattering unit 18 becomes the glued top layer material coarse fraction 5b fed that sprinkled on the first layer becomes.
  • the third scattering unit 19 becomes glued middle layer material 6 fed that as the third layer on the second layer is spread.
  • the fourth spreading unit 20 is glued top layer material coarse fraction 5b supplied, the is sprinkled on the third layer as the fourth layer.
  • the fifth scattering unit 21 becomes glued cover layer material Fine fraction 5a fed to the fifth layer on the fourth layer is scattered. This will put on the ribbon 16 continuously spread a five-layer molding, whereby the outer cover layers made of amino and / or phenolic plastics glued cover layer material fine fraction 5a exist.
  • the scattered five-layer molding then becomes one continuous pre-press 23 which is a pre-compression of the molding. After the pre-pressing, the molding is hot pressed 24 in a further press.
  • This one more Press can be used as a continuous press or as a cycle press be trained. Before hot pressing the five-layer Moldings, it is advantageous to use the mold surfaces to spray a liquid. As a result, when hot pressing the mat warming due to the so-called “Steam-shock effect" accelerates.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Description

Bei der Herstellung von mehrschichtigen Platten aus lignozellulosehaltigen Materialien ist es bekannt, Isocyanat als Bindemittel einzusetzen. Der Einsatz von Isocyanat als Bindemittel für Plattenprodukte sowie die daraus resultierenden Vorund Nachteile sind in dem Sonderdruck "Isocyanat as a binder for particle board", von Dr. G. Loew, Ing. H.I. Sachs, der Bayer AG von 1977 auf Seite 479 beschrieben. Hieraus geht hervor, daß Polyisocyanate unter Druck und Hitze an Metallen anhaften. Als Lösungsmöglichkeit dieser Problematik wird die Verwendung von flüssigen Trennmitteln sowie die Verwendung von Papieren, Furnieren, sowie Staub oder konventionell beleimten Spandeckschichten vorgeschlagen.In the production of multilayer boards made from lignocellulose It is known materials, isocyanate as a binder use. The use of isocyanate as a binder for plate products and the resulting preliminary and Disadvantages are in the special edition "Isocyanat as a binder for particle board ", by Dr. G. Loew, Ing. H.I. Sachs, der Bayer AG from 1977 on page 479. This shows that polyisocyanates adhere to metals under pressure and heat. As a solution to this problem, the Use of liquid release agents as well as the use of Papers, veneers, as well as dust or conventionally glued Chip covering layers proposed.

Ein Verfahren zur Herstellung von mehrschichtigen Plattenwerkstoffen einer mit Isocyanat versetzten Masse aus Holzspänen, Holzfasern oder aus verholzten Rohstoffen ist aus der AT-PS 270,189 bekannt. Weiterhin ist aus dieser Druckschrift bekannt, als Bindemittel ein Gemisch aus Isocyanat sowie Harnstoff-, Melamin- und Phenolformaldehydharzleim zu verwenden oder beispielsweise die Späne in der Deckschicht mit Melaminharz und die Späne der Mittelschicht mit reiner Isocyanatlösung zu binden oder umgekehrt. Durch die Verwendung eines Gemisches der oben genannten Bindemittel wird eine stark erhöhte Feuchtebeständigkeit und eine erhebliche Verminderung der Quellung bei Feuchteeinwirkung der Plattenprodukte erreicht.A process for the production of multilayer board materials a mass of wood chips mixed with isocyanate, Wood fibers or from woody raw materials is from the AT-PS 270,189 known. It is also known from this publication as a binder a mixture of isocyanate and To use urea, melamine and phenol formaldehyde resin glue or, for example, the chips in the top layer with melamine resin and the chips of the middle layer with pure isocyanate solution to tie or vice versa. By using a Mixture of the above-mentioned binders is greatly increased Resistance to moisture and a significant reduction swelling achieved when the plate products are exposed to moisture.

Aus der US 5,779,955 ist ein Verfahren zur Herstellung von Plattenwerkstoffen bekannt, bei dem als Plattenwerkstoff Partikel pflanzlicher Produkte mit Isocyanat als Bindemittel sowie Wasser gemischt werden. Um die bei Verwendung von Isocyanat als Bindemittel auftretenden Probleme des Anhaftens der Matten beim Verpressen zu vermeiden, wird die Unterlage vor dem Streuen des Gemisches mit einem flüssigen Trennmittel bedeckt. Nach dem Streuvorgang wird ebenfalls ein Trennmittel auf die Oberseite des abgelegten Gemisches aufgebracht. Anschließend erfolgt das Heißverpressen des geformten Körpers.No. 5,779,955 describes a process for the production of Known plate materials, in which particles as the plate material vegetable products with isocyanate as a binder as well Water can be mixed. To the when using isocyanate problems of sticking which occur as binders To avoid mats when pressing, the underlay is in front spreading the mixture covered with a liquid release agent. After the spreading process, there is also a release agent applied to the top of the deposited mixture. Subsequently the molded body is hot-pressed.

Aus der DE 38 20 376 ist weiterhin ein Verfahren zur Herstellung von mehrschichtigen Spanplatten durch Heißverpressen von mit Bindemitteln versetzten Holzspänen bekannt. Hierbei wird in der Kernschicht Isocyanat als Bindemittel in Kombination mit formaldehydbindenden Mitteln, wie Harnstoff oder dergleichen eingesetzt. In den Deckschichten wird Isocyanat als Bindemittel eingesetzt. Um das bereits geschilderte Problem des Anhaftens der Matten beim Verpressen zu vermeiden, werden auf den Deckschichten Trenndeckschichten vorgesehen. Diese Trenndeckschichten sind mit Phenolharz gebunden und werden nach dem Aushärten wieder entfernt.DE 38 20 376 also describes a process for the production of multilayer chipboard by hot pressing wood chips mixed with binders are known. Here will in the core layer isocyanate in combination as a binder with formaldehyde-binding agents, such as urea or the like used. Isocyanate is used as a binder in the top layers used. In order to solve the problem of Avoid sticking the mats when pressing on separating cover layers are provided for the cover layers. These separating cover layers are bound with phenolic resin and are after Curing removed.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zur Herstellung von mehrschichtigen plattenförmigen Produkten aus lignozellulosehaltigen Einjahrespflanzen bereitzustellen, bei dem insbesondere die Problematik des Anhaftens bei der Verwendung von Isocyanat als Bindemittel vermieden wird.The object of the present invention is to provide a method for Manufacture from multi-layered plate-shaped products to provide lignocellulosic annual plants at especially the problem of sticking when using of isocyanate as a binder is avoided.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved in the characterizing part of the claim 1 specified features solved.

Durch die im erfindungsgemäßen Verfahren beschriebene Aufteilung des Deckschichtmaterials in eine Feinfraktion und Grobfraktion ist es möglich, durch eine Vorbehandlung der Feinfraktion mit Zuschlagstoffen diese mit Amino- und/oder Phenolplasten zu beleimen. Aufgrund des höheren Mahlgrades der Feinfraktion wird die Benetzungsfähigkeit der Partikel aus lingozellulosehaltigen Einjahrespflanzen mit Amino- und/oder Phenolplasten als Bindemittel begünstigt. Die Zugabe von Benetzungsmittel verbessert zusätzlich die Benetzungseigenschaften. Eine weitere Zugabe eines Haftungsvermittlers beim Vormischen bewirkt eine deutliche Verbesserung der Verklebungseigenschaften der Partikel. Da die äußeren Deckschichten mit Aminound/oder Phenolplasten beleimt sind, wird die Problematik des Anhaftens isocyanatbeleimter Späne an der Plattenoberfläche beim Verpressen vermieden. Bei dem erfindungsgemäßen Verfahren werden keine zusätzlichen Trennmittel oder Trennschichten benötigt, so daß zusätzliche Kosten vermieden werden.By the division described in the inventive method of the top layer material into a fine fraction and coarse fraction it is possible to pretreat the fine fraction with additives, these with amino and / or phenolic plastics to glue. Due to the higher degree of grinding of the fine fraction the wettability of the particles from lingocellulose-containing Annual plants with amino and / or phenolic plastics favored as a binder. The addition of wetting agents additionally improves the wetting properties. Another addition of an adhesion promoter during premixing causes a significant improvement in the adhesive properties the particle. Since the outer cover layers with aminound and / or Phenol plastics are glued, the problem of Adhered to isocyanate-glued chips on the plate surface avoided when pressing. In the method according to the invention no additional release agents or release layers are required, so that additional costs are avoided.

Die in den äußeren Deckschichten vorhandene Kaltklebrigkeit bewirkt eine Oberflächenstabilität der äußeren Schichten des gestreuten Formlings, so daß der mehrschichtige Formling sich ohne Beschädigung der zuvor erreichten Deckschichtqualität über den einzelnen Übergabebereich im Formstrang zum Presseneinlauf transportieren läßt.The cold stickiness present in the outer cover layers causes a surface stability of the outer layers of the scattered molding so that the multi-layer molding itself without damaging the top layer quality previously achieved over the individual transfer area in the molding strand to the press inlet can be transported.

Eine Verwendung eines Bindemittelgemisches aus Isocyanat und Phenol- und/oder Aminoplasten führt gegenüber der ausschließlichen Verwendung von Isocyanat als Bindemittel für das Mittelschichtmaterial sowie das Deckschichtmaterial Grobfraktion aufgrund des abnehmenden Anteils an Isocyanat zu einer Kostenreduktion.Use of a mixture of isocyanate and Phenolic and / or aminoplast leads to the exclusive Use of isocyanate as a binder for the middle layer material as well as the top layer material coarse fraction due to the decreasing proportion of isocyanate at a cost reduction.

Das erfindungsgemäße Verfahren wird anhand eines Ausführungsbeispiels, das in Fig. 1 dargestellt ist, näher beschrieben.The method according to the invention is based on an exemplary embodiment, which is shown in Fig. 1, described in more detail.

In Fig. 1 ist das Verfahren zur Herstellung einer fünfschichtigen Spanplatte schematisch dargestellt. Bei dem erfindungsgemäßen Verfahren zur Herstellung einer fünfschichtigen Spanplatte erfolgt zunächst die Aufbereitung des Rohmaterials. Als Rohmaterial werden lignozellulosehaltige Einjahrespflanzen eingesetzt. Zu lignozellulosehaltigen Einjahrespflanzen gehören beispielsweise Getreidestroh, Reisstroh, Hanf, Flachs, Sojabohnenstroh. Bei der anschließenden Beschreibung des Verfahrens zur Herstellung einer fünfschichtigen Spanplatte wird als Rohmaterial Getreidestroh verwendet.In Fig. 1 is the process for producing a five-layer Chipboard shown schematically. In the invention Process for producing a five-layer chipboard the raw material is processed first. As Raw materials become annual plants containing lignocellulose used. Belong to lignocellulosic annual plants for example grain straw, rice straw, hemp, flax, Soybean straw. In the subsequent description of the procedure to produce a five-layer chipboard used as raw material straw.

Das Getreidestroh wird zunächst in einem mehrstufigen Zerkleinerungsprozeß 1 aufbereitet. Das zerkleinerte Getreidestroh wird anschließend in einem Trockner 2 auf eine Endfeuchte von ca. 2 bis 5 % getrocknet. In einer darauffolgenden Siebstation 3 wird das getrocknete Getreidestroh in die Fraktionen Grobgut 4, Deckschichtmaterial 5, Mittelschichtmaterial 6 und Staub 7 getrennt. Das Grobgut 4 wird in den Zerkleinerungsprozeß 1 zurückgeführt, der Staub 7 wird einem Verbrennungssystem 8 zugeführt. In einer anschließenden zweiten Siebstation 9 wird das Deckschichtmaterial 5 in zwei Fraktionen Deckschicht-Feinfraktion 5a und Deckschicht-Grobfraktion 5b getrennt. Die Deckschicht-Feinfraktion 5a wird anschließend in einem Vormischer 10 mit Zuschlagstoffen wie freie Säuren oder Basen sowie Zugabe von Benetzungsmittel und/oder Haftvermittler vermischt. Die Zugabe von freien Säuren oder Basen wird in Abhängigkeit des zu verwendenden Bindemittels eingestellt. Die so aufbereitete Deckschicht-Feinfraktion 5a wird anschließend einer ersten Beleimungsstation 12 zugeführt. Durch die zwischen Vormischer 10 und erster Beleimungsstation 12 liegenden Förderstrecken sowie Zwischensilos, die in der schematischen Darstellung gemäß Fig. 1 durch Pfeil 11 dargestellt sind, wird die erforderliche Verweilzeit zur Einwirkung der Zuschlagstoffe erreicht. In einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens ist vorgesehen, daß die Benetzungsmittel und/oder Haftvermittler direkt vor der ersten Beleimungsstation 12 zugegeben werden. In der ersten Beleimungsstation 12 wird die vorbehandelte Deckschicht-Feinfraktion 5a mit Aminoplasten als Bindemittel beleimt. Anstelle von Aminoplasten könnten auch Phenolplaste oder Mischungen davon eingesetzt werden. Das Deckschichtmaterial Grobfraktion 5b wird einer zweiten Beleimungsstation 13 zugeführt. In der zweiten Beleimungsstation 13 wird das Deckschichtmaterial Grobfraktion 5b mit Isocyanat als Bindemittel beleimt. In der zweiten Beleimungsstation 13 können zusätzlich zu dem Bindemittel Wasser oder andere Additive zugegeben werden. Es besteht auch die Möglichkeit, Isocyanat in emulgierter Form der Beleimungsstation zuzugeben. In einer weiteren Ausführungsform könnte das Deckschichtmaterial-Grobfraktion 5b auch mit einer Mischung aus Isocyanat und Phenol- und/oder Aminoplasten beleimt werden. Hierbei ist es zweckmäßig, das Deckschichtmaterial-Grobfraktion 5b ebenfalls zuvor einem Vormischer zuzuführen und das Deckschichtmaterial-Grobfraktion 5b mit Zuschlagstoffen wie freie Säuren oder Basen sowie Zugabe von Benetzungsmittel und/oder Haftvermittler zu vermischen.The grain straw is first of all in a multi-stage shredding process 1 processed. The crushed straw is then in a dryer 2 to a final moisture of approx. 2 to 5% dried. In a subsequent sieving station 3 the dried grain straw into the fractions coarse 4, top layer material 5, middle layer material 6 and dust 7 Cut. The coarse material 4 is in the crushing process 1st returned, the dust 7 is a combustion system 8th fed. In a subsequent second screening station 9 the cover layer material 5 in two fractions cover layer fine fraction 5a and top layer coarse fraction 5b separated. The Cover layer fine fraction 5a is then in a premixer 10 with additives such as free acids or bases and addition of wetting agent and / or adhesion promoter mixed. The addition of free acids or bases becomes dependent of the binder to be used. The so prepared top layer fine fraction 5a is then fed to a first gluing station 12. By between Premixer 10 and first gluing station 12 lying Conveyor routes and intermediate silos, which are in the schematic 1 are represented by arrow 11 the required dwell time for the additives to act reached. In a further embodiment of the invention The method provides that the wetting agent and / or adhesion promoter directly in front of the first gluing station 12 are added. In the first gluing station 12 the pretreated top layer fraction 5a with aminoplasts glued as a binder. Instead of aminoplasts phenolic plastics or mixtures thereof could also be used become. The top layer material coarse fraction 5b becomes one second gluing station 13 fed. In the second gluing station 13 the top layer material becomes coarse fraction 5b glued with isocyanate as a binder. In the second gluing station 13 can in addition to the binder water or other additives can be added. There is also Possibility of emulsified isocyanate in the gluing station admit. In a further embodiment, this could Top layer material coarse fraction 5b also with a mixture be glued from isocyanate and phenol and / or aminoplasts. It is advisable to use the coarse fraction of the top layer material 5b also previously to a premixer and the top layer material coarse fraction 5b with additives such as free acids or bases and addition of wetting agents and / or to mix adhesion promoters.

In einer weiteren Ausführungsvariante ist vorgesehen, das Deckschichtmaterial nicht in zwei Fraktionen aufzuteilen, sondern das gesamte Deckschichtmaterial in Abhängigkeit vom Mahlgrad so aufzubereiten, daß eine Beleimung und Vorbehandlung in Übereinstimmung mit der oben beschriebenen Verfahrensweise für Material 5a möglich ist.In a further embodiment it is provided that Top layer material not to be divided into two fractions, but the entire top layer material depending on the degree of grinding to be prepared in such a way that gluing and pretreatment in Consistent with the procedure for Material 5a is possible.

Das bei der Getreidestroh-Aufbereitung gewonnene Mittelschichtmaterial 6 wird einer dritten Beleimungsstation 14 zugeführt. In der dritten Beleimungsstation 14 wird das Mittelschichtmaterial 6 mit Isocyanat als Bindemittel beleimt. In der dritten Beleimungsstation 14 können zusätzlich zu dem Bindemittel Wasser oder andere Additive zugegeben werden. Es besteht auch die Möglichkeit, Isocyanat in emulgierter Form der Beleimungsstation zuzugeben. Weiterhin könnte als Bindemittel eine Mischung aus Isocyanat und Phenol- und/oder Aminoplasten eingesetzt werden. Gegebenenfalls ist dann ebenfalls eine Vormischung mit Zuschlagstoffen erforderlich. The middle layer material obtained from grain straw processing 6 is fed to a third gluing station 14. The middle layer material is in the third gluing station 14 6 glued with isocyanate as a binder. In the third gluing station 14 can in addition to the binder Water or other additives can be added. It exists also the possibility of emulsifying isocyanate in the Add gluing station. It could also be used as a binder a mixture of isocyanate and phenolic and / or aminoplast be used. If necessary, there is also a premix with aggregates required.

Nachdem das Mittelschichtmaterial 6 sowie die Deckschichtmaterialien Feinfraktion 5a und Grobfräktion 5b in den Beleimungsstationen 12, 13, 14 mit den oben aufgeführten Bindemitteln beleimt sind, werden die beleimten Fraktionen einer Formstation 15 zugeführt. Bei dem erfindungsgemäßen Herstellungsverfahren gemäß der schematischen Darstellung nach Fig. 1 besteht die Formstation 15 aus fünf in Transportrichtung des Formbandes 16 hintereinander angeordneten Streueinheiten 17, 18, 19, 20, 21. Die Transportrichtung ist durch den Pfeil 22 angedeutet. Der ersten Streueinheit 17 wird das beleimte Deckschichtmaterial Feinfraktion 5a zugeführt, das als erste Schicht auf das Formband 16 gestreut wird. Der darauffolgenden zweiten Streueinheit 18 wird das beleimte Deckschichtmaterial Grobfraktion 5b zugeführt, das auf die erste Schicht gestreut wird. Der dritten Streueinheit 19 wird beleimtes Mittelschichtmaterial 6 zugeführt, das als dritte Schicht auf die zweite Schicht gestreut wird. Der vierten Streueinheit 20 wird beleimtes Deckschichtmaterial Grobfraktion 5b zugeführt, das als vierte Schicht auf die dritte Schicht gestreut wird. Der fünften Streueinheit 21 wird beleimtes Deckschichtmaterial Feinfraktion 5a zugeführt, das als fünfte Schicht auf die vierte Schicht gestreut wird. Hierdurch wird auf dem Formband 16 kontinuierlich ein fünfschichtiger Formling gestreut, wobei die äußeren Deckschichten aus mit Amino- und/oder Phenolplasten beleimtem Deckschichtmaterial Feinfraktion 5a bestehen. Der gestreute fünfschichtige Formling wird anschließend einer kontinuierlichen Vorpresse 23 zugeführt, die eine Vorverdichtung des Formlings bewirkt. Nach dem Vorpressen wird der Formling in einer weiteren Presse 24 heißverpreßt. Diese weitere Presse kann als kontinuierliche Presse oder als Taktpresse ausgebildet sein. Vor dem Heißverpressen des fünfschichtigen Formlings ist es vorteilhaft, die Formlingsoberflächen mit einer Flüssigkeit zu besprühen. Hierdurch wird beim Heißverpressen die Mattendurchwärmung aufgrund des sogenannten "Dampf-Stoß-Effektes" beschleunigt.After the middle layer material 6 and the top layer materials Fine fraction 5a and coarse fraction 5b in the gluing stations 12, 13, 14 with the binders listed above are glued, the glued fractions of a forming station 15 fed. In the manufacturing method according to the invention according to the schematic representation of FIG. 1 the forming station 15 from five in the transport direction of the forming belt 16 scattering units 17, 18, 19 arranged one behind the other 20, 21. The direction of transport is indicated by arrow 22. The first scattering unit 17 becomes the glued cover layer material Fine fraction 5a supplied as the first layer the ribbon 16 is scattered. The following second Scattering unit 18 becomes the glued top layer material coarse fraction 5b fed that sprinkled on the first layer becomes. The third scattering unit 19 becomes glued middle layer material 6 fed that as the third layer on the second layer is spread. The fourth spreading unit 20 is glued top layer material coarse fraction 5b supplied, the is sprinkled on the third layer as the fourth layer. The fifth scattering unit 21 becomes glued cover layer material Fine fraction 5a fed to the fifth layer on the fourth layer is scattered. This will put on the ribbon 16 continuously spread a five-layer molding, whereby the outer cover layers made of amino and / or phenolic plastics glued cover layer material fine fraction 5a exist. The scattered five-layer molding then becomes one continuous pre-press 23 which is a pre-compression of the molding. After the pre-pressing, the molding is hot pressed 24 in a further press. This one more Press can be used as a continuous press or as a cycle press be trained. Before hot pressing the five-layer Moldings, it is advantageous to use the mold surfaces to spray a liquid. As a result, when hot pressing the mat warming due to the so-called "Steam-shock effect" accelerates.

Claims (10)

  1. Method of producing panel-shaped products by hot press moulding of a multilayered formed body formed from chips of lignocellulose-containing annual plants and having added binding agent, wherein in the middle layer isocyanate is used as a binding agent, characterized in that the cover-layer material is divided into cover-layer material fine fraction (5a) and cover-layer material coarse fraction (5b), wherein the cover-layer material fine fraction (5a) is premixed with adhesive agent and/or wetting agent and/or acids and/or bases, and is then coated with aminoplastics and/or phenolics, and the cover-layer material coarse fraction (5b) is coated with isocyanate or mixtures of isocyanate and aminoplastics and/or phenolics and then a five-layered formed body is scattered, wherein the outermost cover layers consists of cover-layer material fine fraction coated with aminoplastics and/or phenolics.
  2. Method of producing panel-shaped products according to claim 1, characterized in that as lignocellulose-containing annular plants cereal straw is used.
  3. Method according to claim 1, characterized in that as lignocellulose-containing annular plants mixtures of wheat- and barley straw is used.
  4. Method according to claim 1, characterized in that the moisture content of the coated cover-layer and middle-layer material lies between 0 and 25%.
  5. Method according to claim 1, characterized in that the moisture content of the coated cover-layer and middle-layer material lies between 0 and 12%.
  6. Method according to claim 1, characterized in that isocyanate in the form of diphenylmethane diisocyanate is used.
  7. Method according to claim 6, characterized in that 2 to 10% diphenylmethane di-isocyanate relative to absolutely dry raw material is used.
  8. Method according to claim 1, characterized in that the adhesive agent and/or the wetting agent are added immediately upstream of the first coating station.
  9. Method according to claim 1, characterized in that in dependence upon the grinding fineness the proportion of the cover-layer material coarse fraction (5b) lies between 0 and 80%.
  10. Method according to claim 1, characterized in that in dependence upon the grinding fineness the proportion of the cover-layer material coarse fraction (5b) lies between 0 and 50%.
EP00920452A 1999-03-05 2000-02-28 Method of producing panel-shaped products Expired - Lifetime EP1159114B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19909607 1999-03-05
DE19909607A DE19909607A1 (en) 1999-03-05 1999-03-05 Process for the production of plate-shaped products
PCT/EP2000/001661 WO2000053379A1 (en) 1999-03-05 2000-02-28 Method of producing panel-shaped products

Publications (2)

Publication Number Publication Date
EP1159114A1 EP1159114A1 (en) 2001-12-05
EP1159114B1 true EP1159114B1 (en) 2003-10-22

Family

ID=7899756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00920452A Expired - Lifetime EP1159114B1 (en) 1999-03-05 2000-02-28 Method of producing panel-shaped products

Country Status (5)

Country Link
US (1) US6767421B1 (en)
EP (1) EP1159114B1 (en)
CA (1) CA2362718C (en)
DE (2) DE19909607A1 (en)
WO (1) WO2000053379A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE533803C2 (en) * 2008-10-16 2011-01-18 Swedwood Internat Ab Particleboard with middle layer of defibrating wood chips
NZ607832A (en) * 2010-09-10 2014-06-27 Basf Se Multilayer lignocellulose-containing moldings having low formaldehyde emission
DE102015120653B4 (en) * 2015-11-27 2023-05-04 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and system for producing a multi-layer material panel and multi-layer material panel
DE102016110070A1 (en) * 2016-05-31 2017-11-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Plant and method for producing a material plate
AU2016208261A1 (en) * 2016-07-25 2018-02-08 Ampan Naturally Pty Ltd Panel and method of producing a panel
WO2018053001A2 (en) * 2016-09-14 2018-03-22 Hexion Inc. Method for bonding lignocellulosic material with phenolic resin and gaseous carbon dioxide
DE102017111134B4 (en) * 2017-05-22 2018-12-27 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and plant for producing a chipboard
DE102017120043B3 (en) * 2017-08-31 2018-12-20 Siempelkamp Maschinen- Und Anlagenbau Gmbh Plant and method for the production of glued plant particles

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE209289C (en)
AT270189B (en) * 1966-03-17 1969-04-25 Novopan Gmbh Process for the production of panels or moldings by pressing, preferably hot pressing, a mass of wood chips, wood fibers or lignified raw materials mixed with binding agent
US3779843A (en) * 1971-01-21 1973-12-18 H Knapp Continuous process for producing consolidated lignocellulosic material
US4045595A (en) * 1974-06-13 1977-08-30 The Borden Chemical Company (Canada) Limited Coating wood surface by vinyl-modified lignocellulosic particles
US4038531A (en) * 1976-05-18 1977-07-26 Weyerhaeuser Company Process control apparatus for controlling a particleboard manufacturing system
DE2716971C2 (en) * 1977-04-16 1982-06-16 Rütgerswerke AG, 6000 Frankfurt Binder for boiling water and weatherproof panels made of lignocellulosic material
DE7717108U1 (en) * 1977-05-31 1978-01-05 Deutsche Novopan Gmbh, 3400 Goettingen HOT WATER RESISTANT, FORMALDEHYDE-FREE CHIPBOARD
DE2832509C2 (en) * 1978-07-25 1986-02-20 Deutsche Novopan KG, 3400 Göttingen Process for the production of chipboard
US4393019A (en) * 1981-11-30 1983-07-12 The United States Of America As Represented By The Secretary Of Agriculture Method of pressing reconstituted lignocellulosic materials
DE3730776A1 (en) * 1987-09-12 1989-03-23 Basf Ag IMPROVED MULTILAYER SPANNING PLATES AND THEIR MANUFACTURE
DE3820376A1 (en) 1988-06-15 1989-12-21 Novopan Gmbh METHOD FOR PRODUCING MULTI-LAYERED CHIPBOARDS
DE59106627D1 (en) * 1991-04-30 1995-11-09 Schenck Ag Carl Device for the continuous application of a layer of spreading material.
DE9209289U1 (en) * 1992-07-10 1992-08-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eV, 8000 München Moisture-resistant, biologically resistant chipboard
US5554330A (en) * 1995-01-31 1996-09-10 Isoboard Enterprises Inc. Process for the manufacturing of shaped articles
DE19603330C1 (en) 1996-01-31 1997-06-05 Bayer Ag Production of wood material, especially chipboard
US5779955A (en) * 1997-02-24 1998-07-14 G. Siempelkamp Gmbh & Co. Method of making shaped bodies especially boards
DK176116B1 (en) * 1997-03-18 2006-08-14 Wesser & Dueholm Process for manufacturing particleboard, fiberboard and the like
DE10049050A1 (en) * 2000-10-04 2002-04-25 Dieffenbacher Gmbh Maschf Oriented strand board with a shavings core and long chip outer layers, are obtained inexpensively with high bending modulus by using specified particle geometrical composition, core shavings content and pressure profile
DE102006062258A1 (en) 2006-12-22 2008-06-26 Basf Se Transferring heat to a liquid mixture comprising (meth)acrylic monomer comprises introducing the liquid mixture simultaneously into the primary side of the heat exchanger by a liquid heat carrier and secondary side of the heat exchanger

Also Published As

Publication number Publication date
CA2362718A1 (en) 2000-09-14
WO2000053379A1 (en) 2000-09-14
US6767421B1 (en) 2004-07-27
CA2362718C (en) 2007-01-02
DE19909607A1 (en) 2000-09-07
DE50004152D1 (en) 2003-11-27
EP1159114A1 (en) 2001-12-05

Similar Documents

Publication Publication Date Title
EP1159113B1 (en) Method of producing panel-shaped products
EP1847385B1 (en) Construction board and method for manufacturing a construction board
EP1915253B2 (en) Light-weight multilayer engineered wood board
DE60012839T2 (en) Chipboard material and process for its production
EP2223786B1 (en) Composite wood board and method for producing same
DE4236266A1 (en) Method to manufacture MDF panels - uses residual/waste products, which are mixed with adhesive and added to internal layer of panels
EP1159114B1 (en) Method of producing panel-shaped products
EP2961580B1 (en) Wood and composite-material plate and method for its manufacturing
CA3150406A1 (en) Construction board and method of making same
EP1469140B1 (en) Process for production of a panel with a core of a wood-based material
DE102005033687A1 (en) Wooden fiber boards made of ligno-cellulose bound with binding agent mixed with additional material if desired; method to produce same whereby fibers are shredded, fluid binding agents added, fibers dried and materials added in
EP2355965B1 (en) Composition and process for producing a wooden or wood fibre plate
EP2819819B1 (en) Method for producing wood materials and/or composite materials
EP1575744B1 (en) Combination material and method for the production thereof
DE19604575A1 (en) Process for the production of chipboard or fiberboard
DE10049050A1 (en) Oriented strand board with a shavings core and long chip outer layers, are obtained inexpensively with high bending modulus by using specified particle geometrical composition, core shavings content and pressure profile
EP1681146B2 (en) Method of manufacturing a board of wooden material using a thermoplastic binder
AT397805B (en) METHOD FOR PRODUCING A SYNTHETIC RESIN PRINTING BODY
WO2005018890A1 (en) Method for producing a multilayer fibreboard
DE10314623B3 (en) Machine for spreading wood chip coated with isocyanate adhesive, for use in e.g. chipboard production, comprises three sets of distributing rollers which feed chips from hopper into batt, at least one roller being heated
EP1048424A2 (en) Composite corkplate and method for the production thereof
DE202005020890U1 (en) Wood fibre plate for construction work has wood fibres of a coarse long-fibre structure bound by binders such as adhesive particles, polymerisation resins, wax, starch
DE19921019A1 (en) Cork composite plate, useful as thermal and acoustic insulation, comprises layers of wood particles and cork particles, treated with glue and compressed simultaneously
DE2554658C3 (en) Process for the manufacture of molded sheets
WO2019038115A1 (en) Method for producing lignocellulose materials in the presence of caprolactam and oligomers of caprolactam

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010920

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031022

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50004152

Country of ref document: DE

Date of ref document: 20031127

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040122

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040723

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080423

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090901