EP1226006B1 - Plate-shaped moulding elements based on natural fibres and method for the production thereof - Google Patents

Plate-shaped moulding elements based on natural fibres and method for the production thereof Download PDF

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Publication number
EP1226006B1
EP1226006B1 EP00962480A EP00962480A EP1226006B1 EP 1226006 B1 EP1226006 B1 EP 1226006B1 EP 00962480 A EP00962480 A EP 00962480A EP 00962480 A EP00962480 A EP 00962480A EP 1226006 B1 EP1226006 B1 EP 1226006B1
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Prior art keywords
fibers
activation
takes place
natural fibers
hot air
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German (de)
French (fr)
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EP1226006A1 (en
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Matthias TRÖGER
Uwe Lange
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Homatherm GmbH
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Homatherm AG
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    • 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
    • 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

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  • the present invention relates to a process for the production of plate-like form elements based on natural fibers, wherein natural fibers mixed with binders, the mixture is applied from a forming station, optionally formed and finally bound, the binder in the form of at least partially after activation binder-forming multi-component fibers from a Carrier material is mixed, wherein the multicomponent fibers are formed from a support member and a sheath of a crosslinked plastic.
  • Extensive processes for the production of corresponding plate-shaped mold elements are known in the prior art, for example chipboard production, fiber board production (hdf, mdf), cellulose plates or mat production and the like.
  • fibers, chips and the like are mixed with liquid binders by blowing. Binders are, for example, urea-formaldehyde glue, phenolic imine and the like. Applications in the liquid state are rather uncommon in the case of cellulose plates or their production processes.
  • the fibers are dried and discharged.
  • the fibers can also be mixed with binder in a mixer gluing, resulting in a semi-moist mixture.
  • the dried or semi-wet mixtures are placed on forming stations, usually endless molds formed by forming belts. Finally, a hot pressing takes place in order to bind the applied and possibly shaped plates. It is also known to pass hot steam to activate the glue.
  • a method of the generic type is for example from US 5,824,246 known. Described here is a method according to which a mixture of natural fibers and a thermally activated binder is placed in a hot air press.
  • the peculiarity of the hot air press is that it has two relatively movable to each other arranged compacts, each compact having discharge nozzles, via which the material to be pressed is applied during the pressing process with hot air.
  • a piping system is arranged within each compact, which distributes the hot air to be supplied to the compacts uniformly on the outlet nozzles.
  • the process step of hot air pressing can be followed by a pressing operation in a conventional press with the aim of obtaining mold elements which are compressed to an appropriate extent.
  • the present invention the object of developing a generic method to the effect that in a simple manner with little economic effort and compared to conventional manufacturing process flexible and accurate quality expectation plate-shaped elements can be produced.
  • mats or plates of the generic type should be easier and with lower bulk density, ie more flexible with simultaneous savings by reduced material requirements to produce.
  • the activation takes place by means of hot air.
  • the spread mixture can be damped before the hot air treatment, resulting in a higher strength of the mats or plates.
  • the mold element is cooled, in particular by applying cold air.
  • Natural fibers may be cellulose fibers, for example also produced from waste paper preparation, wood fibers or even wood chips, mineral wool or other vegetable fibers and the like. Almost any mix can be created.
  • the body elements are advantageously also fibrous, but also flakes and similar body shapes are conceivable.
  • "After activation form binder" within the meaning of the invention comprises the release of the in the form binders adhered to body members formed of multi-component fibers or also the formation of multi-component binders.
  • BiKo fibers are known, hot melt adhesive fibers and the like, which can be used.
  • crosslinking binders including copolymers or polyethylene may be used, which may be applied, for example, on polymeric carriers, fibrous, flake-like or the like.
  • the hot-air activation melts the copolymers or polyethylene sheaths and crosslinks both with the polymer carriers and with each other, whereby the good but flexible composite of mats or plates is achieved. Subsequent cooling completes the crosslinking process.
  • a particular advantage of the invention results from the fact that the natural fibers and the body elements can be mixed very easily in a simple manner, so that it can be assumed that the molding element has a very good bond over the total volume.
  • the molding mixtures can be generated dry, so that it is possible, for example, to store or transport mixtures.
  • the manufacturing process is much more flexible, because no longer necessarily at the place of mixing must be processed. The storage of the individual components and the mixture of components are simplified.
  • the mixture can be handled more easily overall, so that can be dispensed with expensive scattering devices and the like. It is sufficient simple known mechanical scattering heads and the like.
  • the shaping is also very simple and the activation, for example by blowing hot air through, is much more economical and easier than hot presses.
  • a novel, plate-shaped molded element based on natural fibers formed from a mixture of natural fibers with at least partially after activation binder forming multicomponent fibers, wherein the multicomponent fibers consist of a support member and a sheath of a crosslinking plastic.
  • Such plates have one defined quality status and can be produced in a simple and economical way very flexible.
  • the plates are flexible overall and have a low bulk density. This results in an economic manufacturability of the plates according to the invention, since less material is required for the same volume.
  • the handling of the mats or plates is considerably improved because they are no longer prone to breakage and have the flexibility required for handling. They can be pressed into intermediate spaces, are compressible and can even be thrown during transport and also do not tend to break off the edges with unilateral application of force. Corresponding higher strengths can be achieved by simply pre-steaming before the hot air activation.
  • short fibers 1 for example paper fibers, wood fibers, cellulose fibers or the like
  • long fibers 2 for example jute, sisal and the like
  • binder 3 are mixed together.
  • the binder body elements may be thread-like, flake-shaped or otherwise formed.
  • corresponding carrier elements have a coating of crosslinking plastics, for example polymer carriers with copolymer or polyethylene coating.
  • the base material consisting of natural fibers, which may be composed of short fibers 1 and 2 long fibers, optionally a fire retardant, eg. As borax, and a binder 3, z. B. Biko-Fasem, are mixed together in the station 4, and then mechanically applied at 5 and formed into a mat.
  • a fire retardant eg. As borax
  • a binder 3 z. B. Biko-Fasem

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  • Manufacturing & Machinery (AREA)
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Abstract

The object of the present invention is to provide board-like molded elements that can be produced in a simple manner, at low cost, and that will be more flexible and possess a more precise standard of quality than can be achieved with conventional methods, and a method for producing said elements. In order to attain this object, a method for producing board-like molded elements made from natural fibers is proposed pursuant to the invention, wherein natural fibers are mixed with bonding agents, the mixture is placed on a molding platform where it may be shaped, after which the elements are bonded, characterized in that the bonding agent is admixed in the form of material elements that at least partially form bonding agents following an activation.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von plattenförmigen Formelementen auf Naturfaserbasis, wobei Naturfasern mit Bindemitteln vermischt, die Mischung aus einer Formstation ausgebracht, gegebenenfalls ausgeformt und schließlich gebunden wird, wobei das Bindemittel in Form von wenigstens teilweise nach einer Aktivierung Bindemittel bildenden Mehrkomponentenfasern aus einem Trägermaterial beigemischt wird, wobei die Mehrkomponentenfasern aus einem Trägerelement und einer Ummantelung eines vernetzten Kunststoffes gebildet sind.The present invention relates to a process for the production of plate-like form elements based on natural fibers, wherein natural fibers mixed with binders, the mixture is applied from a forming station, optionally formed and finally bound, the binder in the form of at least partially after activation binder-forming multi-component fibers from a Carrier material is mixed, wherein the multicomponent fibers are formed from a support member and a sheath of a crosslinked plastic.

Im Stand der Technik sind umfangreiche Verfahren zur Herstellung von entsprechenden plattenförmigen Formelementen bekannt, beispielsweise Spanplattenherstellung, Faserplattenherstellung (hdf, mdf), Zelluloseplatten beziehungsweise -mattenherstellung und dergleichen. Üblicherweise werden dabei Fasern, Späne und dergleichen mit flüssigen Bindemitteln im Blasverfahren vermischt. Bindemittel sind beispielsweise Harnstoff-Formaldehydleim, Phenolleim und dergleichen. Ausbringungen im flüssigen Zustand sind bei Zelluloseplatten beziehungsweise deren Herstellungsverfahren eher unüblich. Üblicherweise werden die Fasern getrocknet und ausgebracht. Alternativ können die Fasern mit Bindemittel auch in einer Mischerbeleimung vermischt werden, woraus sich eine halbfeuchte Mischung ergibt. Die getrockneten oder halbfeuchten Mischungen werden auf Formstationen gebracht, üblicherweise durch Formbänder gebildete endlose Formen. Schließlich erfolgt ein Heißpressen, um die ausgebrachten und gegebenenfalls ausgeformten Platten zu binden. Es ist auch bekannt, Heißdampf hindurchzuführen, um den Leim zu aktivieren.Extensive processes for the production of corresponding plate-shaped mold elements are known in the prior art, for example chipboard production, fiber board production (hdf, mdf), cellulose plates or mat production and the like. Usually fibers, chips and the like are mixed with liquid binders by blowing. Binders are, for example, urea-formaldehyde glue, phenolic imine and the like. Applications in the liquid state are rather uncommon in the case of cellulose plates or their production processes. Usually, the fibers are dried and discharged. Alternatively, the fibers can also be mixed with binder in a mixer gluing, resulting in a semi-moist mixture. The dried or semi-wet mixtures are placed on forming stations, usually endless molds formed by forming belts. Finally, a hot pressing takes place in order to bind the applied and possibly shaped plates. It is also known to pass hot steam to activate the glue.

Nachteile der vorbekannten Verfahren bestehen in der aufwändigen Verfahrensführung und dem notwendigen Vorrichtungsaufwand zur Erstellung der Mischung. Darüber hinaus stellt die Lagerung Probleme dar, da Fasern einerseits und Bindemittel andererseits zunächst getrennt gelagert werden. Nach der Mischung muss üblicherweise die Weiterverarbeitung vor Ort direkt erfolgen. Auch im Bereich der Ausformung und der Heizpressen muss ein entsprechend großer Aufwand getrieben werden, weil die Mischung immer einen hohen Feuchtigkeitsgehalt hat. Schlussendlich sind die nach den bekannten Verfahren hergestellten Platten entweder wegen der Feuchtigkeitssteuerung aufwändig in der Herstellung oder bei Vernachlässigung dieses Parameters von unspezifischer Qualität. Darüber hinaus haben nach herkömmlichen Verfahren hergestellte Matten beziehungsweise Platten eine hohe Rohdichte und sind daher schon vom Materialbedarf her unwirtschaftlich. Die hohe Rohdichte bedingt eine gewisse Starrheit der Matten oder Platten, die im praktischen Einsatz nicht ohne leichten Bruch zu handhaben sind.Disadvantages of the previously known methods consist in the complex process control and the necessary device complexity for the preparation of the mixture. In addition, the storage problems, since fibers on the one hand and binders on the other hand initially stored separately. After mixing, usually the further processing on site must be done directly. Also in the field of molding and heating presses a correspondingly great effort must be driven, because the mixture always has a high moisture content. Finally, the plates produced by the known methods, either because of the moisture control consuming in the manufacture or neglecting this parameter of unspecific quality. In addition, mats or plates produced by conventional methods have a high density and therefore are already uneconomical from the material requirements. The high bulk density requires a certain rigidity of the mats or plates, which are not to handle in practical use without easy breakage.

Ein Verfahren der gattungsgemäßen Art ist beispielsweise aus der US 5,824,246 bekannt. Beschrieben ist hier ein Verfahren, gemäß welchem eine Mischung aus Naturfasern und einem thermoaktivierbaren Bindemittel in eine Heißluftpresse gegeben wird. Dabei besteht die Besonderheit der Heißluftpresse darin, dass diese über zwei relativ zueinander verfahrbar angeordnete Presskörper verfügt, wobei jeder Presskörper über Austrittsdüsen verfügt, über welche das Pressgut während des Pressvorgangs mit Heißluft beaufschlagt wird. Zu diesem Zweck ist innerhalb eines jeden Presskörpers ein Rohrleitungssystem angeordnet, welches die den Presskörpern zuzuführende Heißluft gleichmäßig auf die Austrittsdüsen verteilt. Dem Verfahrensschritt der Heißluftpressung kann mit dem Ziel, auf ein bestimmungsgemäßes Maß zusammengepresste Formelemente zu erhalten, ein Pressvorgang in einer herkömmlichen Presse nachfolgen.A method of the generic type is for example from US 5,824,246 known. Described here is a method according to which a mixture of natural fibers and a thermally activated binder is placed in a hot air press. Here, the peculiarity of the hot air press is that it has two relatively movable to each other arranged compacts, each compact having discharge nozzles, via which the material to be pressed is applied during the pressing process with hot air. For this purpose, a piping system is arranged within each compact, which distributes the hot air to be supplied to the compacts uniformly on the outlet nozzles. The process step of hot air pressing can be followed by a pressing operation in a conventional press with the aim of obtaining mold elements which are compressed to an appropriate extent.

Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein gattungsgemäßes Verfahren dahingehend weiterzubilden, dass auf einfache Weise mit geringem wirtschaftlichen Aufwand und gegenüber herkömmlichen Herstellungsverfahren flexibler und mit genauer Qualitätserwartung plattenförmige Formelemente herstellbar sind. Darüber hinaus sollen auch Matten oder Platten der gattungsgemäßen Art leichter und mit geringerer Rohdichte, also flexibler bei gleichzeitigem Einsparpotential durch verringerten Materialbedarf herstellbar sein.Based on this prior art, the present invention, the object of developing a generic method to the effect that in a simple manner with little economic effort and compared to conventional manufacturing process flexible and accurate quality expectation plate-shaped elements can be produced. In addition, mats or plates of the generic type should be easier and with lower bulk density, ie more flexible with simultaneous savings by reduced material requirements to produce.

Zur technischen Lösung dieser Aufgabe wird vorgeschlagen, ein gattungsgemäßes Verfahren dahingehend weiterzubilden, dass das Aktivieren mittels Heißluft erfolgt, wobei vor dem Aktivieren mittels Heißluft die ausgebrachte Masse durchdämpft wird.For the technical solution of this problem is proposed, a generic Further develop a method in that the activation takes place by means of hot air, wherein before being activated by means of hot air, the discharged mass is attenuated.

Durch die Erfindung wird es nunmehr möglich, einerseits die auszubringenden Naturfasern vorzubereiten, andererseits trockene, nach Aktivierung Bindemittel bildende Körperelemente in Form von Mehrkomponentenfasern zu verwenden. Beide, also Naturfasern und Körperelemente, können mechanisch vermischt werden, mechanisch ausgebracht werden, beispielsweise durch Streuen, auf einfache Weise ausgeformt werden und schließlich gebunden werden. Für das Ausformen wird gemäß einem Vorschlag der Erfindung ebenfalls ein mechanisches Verfahren vorgeschlagen, beispielsweise Abstreifen, Pressen und dergleichen. Schlußendlich wird zum Binden der Platte die Bindemittelbildung der Körperelemente aktiviert.By means of the invention it is now possible, on the one hand, to prepare the natural fibers to be applied and, on the other hand, to use dry body elements in the form of multicomponent fibers which form binding agents after activation. Both, ie natural fibers and body elements, can be mechanically mixed, applied mechanically, for example, by spreading, be formed in a simple manner and finally bound. For the shaping according to a proposal of the invention also a mechanical method is proposed, for example stripping, pressing and the same. Finally, binder binding of the body members is activated to bind the panel.

Gemäß einem vorteilhaften Vorschlag der Erfindung erfolgt die Aktivierung mittels Heißluft. Optional kann vor der Heißluftbehandlung das ausgebrachte Gemenge gedämpft werden, woraus sich eine höhere Festigkeit der Matten bzw. Platten ergibt. Im Anschluß an die Aktivierung mittels Heißluft wird das Formelement gekühlt, insbesondere durch Kaltluftbeaufschlagung.According to an advantageous proposal of the invention, the activation takes place by means of hot air. Optionally, the spread mixture can be damped before the hot air treatment, resulting in a higher strength of the mats or plates. Following activation by means of hot air, the mold element is cooled, in particular by applying cold air.

Naturfasern können Zellulosefasern, beispielsweise hergestellt auch aus Altpapieraufbereitung, Holzfasern oder gar Holzspäne, Mineralwolle oder auch sonstige Pflanzenfasern und dergleichen sein. Es können nahezu beliebige Mischungen erstellt werden.Natural fibers may be cellulose fibers, for example also produced from waste paper preparation, wood fibers or even wood chips, mineral wool or other vegetable fibers and the like. Almost any mix can be created.

Die Körperelemente sind in vorteilhafter Weise ebenfalls faserförmig ausgebildet, aber auch Flocken und ähnliche Körperformen sind denkbar. "Nach Aktivierung Bindemittel bilden" im Sinne der Erfindung umfaßt die Freigabe von an den in Form von Mehrkomponentenfasern ausgebildeten Körperelementen angehafteten Bindemitteln oder auch die Bildung von Mehrkomponentenbindemitteln. So sind beispielsweise sogenannte BiKo-Fasern bekannt, Schmelzkleberfasern und dergleichen, die eingesetzt werden können. Wesentlich ist im Rahmen der Erfindung die Verwendung von vernetzenden Bindemitteln, wozu Copolymere oder Polyethylen verwendet werden kann, welches beispielsweise auf Polymerträgern, faserförmig, flockenförmig oder dergleichen, aufgebracht sein kann. Durch die Heißluftaktivierung schmelzen die Copolymere oder Polyethylenummantelungen auf und vernetzen sich sowohl mit den Polymerträgern als auch untereinander, wodurch der gute aber dennoch flexible Verbund der Matten bzw. Platten erzielt wird. Durch anschließendes Kühlen wird der Vernetzungsprozeß komplettiert.The body elements are advantageously also fibrous, but also flakes and similar body shapes are conceivable. "After activation form binder" within the meaning of the invention comprises the release of the in the form binders adhered to body members formed of multi-component fibers or also the formation of multi-component binders. Thus, for example, so-called BiKo fibers are known, hot melt adhesive fibers and the like, which can be used. It is essential in the context of the invention, the use of crosslinking binders, including copolymers or polyethylene may be used, which may be applied, for example, on polymeric carriers, fibrous, flake-like or the like. The hot-air activation melts the copolymers or polyethylene sheaths and crosslinks both with the polymer carriers and with each other, whereby the good but flexible composite of mats or plates is achieved. Subsequent cooling completes the crosslinking process.

Ein besonderer Vorteil der Erfindung ergibt sich daraus, daß die Naturfasern und die Körperelemente auf einfache Weise sehr gut durchmischt werden können, so daß davon ausgegangen werden kann, daß das Formelement über das Gesamtvolumen eine sehr gute Bindung aufweist. Darüber hinaus können die Formmischungen trocken erzeugt werden, so daß es möglich ist, beispielsweise Mischungen zu lagern oder auch zu transportieren. Dadurch wird der Herstellungsprozeß erheblich flexibler, weil nicht mehr zwingend am Ort der Mischung verarbeitet werden muß. Die Lagerhaltung der Einzelkomponenten sowie die Mischung der Komponenten sind vereinfacht.A particular advantage of the invention results from the fact that the natural fibers and the body elements can be mixed very easily in a simple manner, so that it can be assumed that the molding element has a very good bond over the total volume. In addition, the molding mixtures can be generated dry, so that it is possible, for example, to store or transport mixtures. As a result, the manufacturing process is much more flexible, because no longer necessarily at the place of mixing must be processed. The storage of the individual components and the mixture of components are simplified.

Weiterhin läßt sich die Mischung insgesamt leichter handhaben, so daß auf aufwendige Streuvorrichtungen und dergleichen verzichtet werden kann. Es reichen einfache an sich bekannte mechanische Streuköpfe und dergleichen. Die Formgebung ist ebenfalls sehr einfach und die Aktivierung, beispielsweise durch Hindurchblasen von Heißluft, ist gegenüber Heizpressen sehr viel wirtschaftlicher und einfacher.Furthermore, the mixture can be handled more easily overall, so that can be dispensed with expensive scattering devices and the like. It is sufficient simple known mechanical scattering heads and the like. The shaping is also very simple and the activation, for example by blowing hot air through, is much more economical and easier than hot presses.

Nach dem Verfahren ergibt sich ein neuartiges, plattenförmiges Formelement auf Naturfaserbasis, gebildet aus einer Mischung von Naturfasern mit wenigstens teilweise nach Aktivierung Bindemittel bildenden Mehrkomponentenfasern, wobei die Mehrkomponentenfasern aus einem Trägerelement und einer Ummantelung eines vernetzenden Kunststoffes bestehen. Derartige Platten haben einen definierten Qualitätszustand und lassen sich auf einfache und wirtschaftliche Weise sehr flexibel herstellen.According to the method, a novel, plate-shaped molded element based on natural fibers, formed from a mixture of natural fibers with at least partially after activation binder forming multicomponent fibers, wherein the multicomponent fibers consist of a support member and a sheath of a crosslinking plastic. Such plates have one defined quality status and can be produced in a simple and economical way very flexible.

Die Vorteile ergeben sich aus der Durchmischung der Naturfasern einerseits mit synthetischen Fasern zur Bereitstellung des Bindemittels andererseits. Durch die Verwendung des vernetzenden Bindemittels werden die Platten insgesamt flexibel und weisen eine nur geringe Rohdichte auf. Dadurch ergibt sich eine wirtschaftliche Herstellbarkeit der erfindungsgemäßen Platten, da bei gleichem Volumen weniger Material benötigt wird. Darüber hinaus ist die Handhabung der Matten bzw. Platten erheblich verbessert, denn diese neigen nicht mehr zum Bruch und weisen die für die Handhabbarkeit erforderliche Flexibilität auf. Sie lassen sich in Zwischenräume pressen, sind komprimierbar und lassen sich sogar beim Transport werfen und neigen auch nicht zum Abbruch der Kanten bei einseitiger Kraftbeaufschlagung. Entsprechende höhere Festigkeiten können durch einfaches Vordämpfen vor der Heißluftaktivierung erzielt werden.The advantages arise from the mixing of natural fibers on the one hand with synthetic fibers to provide the binder on the other. Through the use of the crosslinking binder, the plates are flexible overall and have a low bulk density. This results in an economic manufacturability of the plates according to the invention, since less material is required for the same volume. In addition, the handling of the mats or plates is considerably improved because they are no longer prone to breakage and have the flexibility required for handling. They can be pressed into intermediate spaces, are compressible and can even be thrown during transport and also do not tend to break off the edges with unilateral application of force. Corresponding higher strengths can be achieved by simply pre-steaming before the hot air activation.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung anhand der Figuren. Dabei zeigen:

Fig. 1
ein Blockschaltbild für ein Ausführungsbeispiel eines Verfahrensablaufes des erfindungsgemäßen Verfahrens.
Further advantages and features of the invention will become apparent from the following description with reference to FIGS. Showing:
Fig. 1
a block diagram of an embodiment of a process flow of the method according to the invention.

Gemäß dem gezeigten Ausführungsbeispiel werden Kurzfasern 1, beispielsweise Papierfasern, Holzfasern, Zellulosefasern oder dergleichen, Langfasern 2, beispielsweise Jute, Sisal und dergleichen sowie Bindemittel 3 miteinander vermischt. Die Bindemittelkörperelemente können faden- bzw. faserförmig, flockenförmig oder sonstwie gebildet sein. Insbesondere weisen entsprechende Trägerelemente eine Ummantelung vernetzender Kunststoffe auf, beispielsweise Polymerträger mit Copolymer- oder Polyethylenummantelung.According to the embodiment shown, short fibers 1, for example paper fibers, wood fibers, cellulose fibers or the like, long fibers 2, for example jute, sisal and the like and binder 3 are mixed together. The binder body elements may be thread-like, flake-shaped or otherwise formed. In particular, corresponding carrier elements have a coating of crosslinking plastics, for example polymer carriers with copolymer or polyethylene coating.

Der Grundstoff, bestehend aus Naturfasern, welche aus Kurzfasern 1 und Langfasern 2 zusammengesetzt sein können, optional ein Brandschutzmittel, z. B. Borax, und ein Bindemittel 3, z. B. Biko-Fasem, werden in der Station 4 miteinander vermischt, und anschließend bei 5 mechanisch ausgebracht und zur Matte ausgeformt. Diese Vorgänge erfolgen in an sich bekannter Weise auf rein mechanischem Wege, wobei die Ausformung beispielsweise durch Abstreichen und dergleichen erfolgen kann. Im gezeigten Ausführungsbeispiel wird die ausgeformte Matte zunächst zur Erzielung einer hohen Festigkeit im Schritt 6 gedämpft. Anschließend erfolgt in Schritt 7 ein Pressen und eine Heißluftaktivierung, bei welcher zugleich die durch Dämpfen eingebrachte Feuchtigkeit ausgetrocknet wird. Sofern vernetzende Bindemittel verwendet wurden, erfolgt abschließend ein Kühlschritt 8. Schließlich wird im Schritt 9 die Matte oder Platte konfektioniert, also aufgeschnitten und dergleichen. Abschließend werden die so formatierten Platten in Schritt 10 verpackt.The base material, consisting of natural fibers, which may be composed of short fibers 1 and 2 long fibers, optionally a fire retardant, eg. As borax, and a binder 3, z. B. Biko-Fasem, are mixed together in the station 4, and then mechanically applied at 5 and formed into a mat. These processes are carried out in a conventional manner to pure mechanical ways, wherein the shaping can be done for example by scraping and the like. In the embodiment shown, the molded mat is first attenuated in step 6 to achieve high strength. Subsequently, in step 7, a pressing and a hot air activation, wherein at the same time the introduced by steaming moisture is dried out. If crosslinking binders were used, a cooling step 8 is finally carried out. Finally, in step 9, the mat or board is made up, ie cut open and the like. Finally, the so-formatted plates are packed in step 10.

Beispiel 1:Example 1:

Vermischt man mit Brandschutz ausgerüstete Zellulosefasern mit Polyester/Polyolefin-Biko-Fasern, streut die Mischung mechanisch ab, dämpft die gestreute Matte kurzzeitig und trocknet sie danach so, daß überall in der Matte die Schmelztemperatur der Fasern erreicht wird, erhält man nach dem Abkühlen eine flexible Dämmplatte, die im Vergleich zu herkömmlichen Zellulose-Dämmplatten bei halber Rohdichte die doppelte Zugfestigkeit erreicht. Das Mischungsverhältnis Zellulosefasern zu Biko-Fasem liegt dabei zwischen 4:1 und 20:1.If one mixes fire-resistant cellulose fibers with polyester / polyolefin biko fibers, the mixture spreads mechanically, damps the scattered mat for a short time and then dried so that the melting temperature of the fibers is reached everywhere in the mat, one gets after cooling Flexible insulation board that achieves double the tensile strength at half the density compared to conventional cellulose insulation boards. The mixing ratio of cellulose fibers to biko fibers is between 4: 1 and 20: 1.

Das beschriebene Ausführungsbeispiel dient nur der Erläuterung und ist nicht beschränkend.The described embodiment is merely illustrative and not limiting.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kurzfasernshort fibers
22
Langfasernlong fibers
33
Bindemittelbinder
44
Stationstation
55
mechanisches Ausbringen und Formenmechanical spreading and shaping
66
Dämpfendampen
77
Pressen und HeißluftaktivierungPressing and hot air activation
88th
KühlenCool
99
Konfektionierungpacking
1010
Verpackenpacking

Claims (13)

  1. Method for the production of plate-shaped molding elements based on natural fibers, wherein said natural fibers are mixed with binders (3), the mixture is spread from a molding station (4), shaped if necessary and finally bound, said binder being admixed in the form of multi-component fibers from a substrate at least partly forming binders after activation thereof, wherein the multi-component fibers are formed from a substrate and a sheath from a cross-linked plastic material,
    characterized in
    that the activation takes place by means of hot air, wherein the spread mass is steamed through by hot air prior to the activation.
  2. Method according to claim 1, characterized in that the multi-component fibers at least partially include multi-component binders.
  3. Method according to claim 1 or 2, characterized in that a polymer substrate is used as a substrate.
  4. Method according to one of the preceding claims, characterized in that the activation takes place by means of hot air.
  5. Method according to one of the preceding claims, characterized in that at the end of the hot air activation the molding element is subject to cooling air.
  6. Method according to one of the preceding claims, characterized in that the natural fibers comprise cellulose fibers.
  7. Method according to one of the preceding claims, characterized in that the natural fibers comprise wood fibers.
  8. Method according to one of the preceding claims, characterized in that mixing of the natural fibers and multi-component fibers takes place mechanically.
  9. Method according to one of the preceding claims, characterized in that the mixture is spread mechanically.
  10. Method according to claim 9, characterized in that spreading takes places by sprinkling.
  11. Method according to one of the preceding claims, characterized in that shaping takes place mechanically.
  12. Method according to claim 11, characterized in that shaping takes place at least partially by wiping.
  13. Method according to one of the claims 11 or 12, characterized in that shaping takes place at least partially by pressing.
EP00962480A 2000-09-13 2000-09-13 Plate-shaped moulding elements based on natural fibres and method for the production thereof Expired - Lifetime EP1226006B1 (en)

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PCT/EP2000/008925 WO2002022331A1 (en) 2000-09-13 2000-09-13 Plate-shaped moulding elements based on natural fibres and method for the production thereof

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EP1226006B1 true EP1226006B1 (en) 2010-01-06

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EP (1) EP1226006B1 (en)
JP (1) JP4203317B2 (en)
AT (1) ATE454253T1 (en)
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DE (1) DE50015837D1 (en)
DK (1) DK1226006T3 (en)
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WO (1) WO2002022331A1 (en)

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DE102005006796B3 (en) * 2005-02-14 2006-09-07 Grenzebach Bsh Gmbh Method and device for producing insulation boards
US8454795B1 (en) 2006-12-05 2013-06-04 Mark J. Henderson System and method for producing bonded fiber/cellulose products
DE102007048422A1 (en) * 2007-10-09 2009-04-16 Homatherm Ag Wood fiber thermal insulation material and method for its production
DE102008039720B4 (en) 2008-08-26 2012-09-13 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Process for the production of wood fiber insulation boards "
FI127330B (en) 2009-01-30 2018-03-29 Upm Kymmene Corp A method for adding a coupling agent to a raw material
DE202014106187U1 (en) 2014-12-19 2016-02-22 Dieffenbacher GmbH Maschinen- und Anlagenbau Insulation and / or sound insulation board
DE102014119242A1 (en) 2014-12-19 2016-06-23 Dieffenbacher GmbH Maschinen- und Anlagenbau Insulating and / or soundproofing board, their use and a method for the production of insulating and / or soundproofing panels
DE102020132552A1 (en) 2020-12-08 2022-06-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Method for manufacturing wood fiber insulation products and wood fiber insulation product

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GB1414225A (en) * 1973-03-01 1975-11-19 Trus Joist Corp Continuous press for pressing glue-coated consolidatable press charges
DE3412660C2 (en) * 1984-04-02 1987-01-02 Günter H. 1000 Berlin Kiss Process for producing molded parts from fibrous material
DE3629586A1 (en) * 1986-08-30 1988-03-10 Kunnemeyer Hornitex METHOD FOR PRODUCING WOOD FIBER PANELS
DK245488D0 (en) * 1988-05-05 1988-05-05 Danaklon As SYNTHETIC FIBER AND PROCEDURES FOR PRODUCING THEREOF
US5824246A (en) 1991-03-29 1998-10-20 Engineered Composites Method of forming a thermoactive binder composite
US5284704A (en) * 1992-01-15 1994-02-08 American Felt & Filter Company Non-woven textile articles comprising bicomponent fibers and method of manufacture
US5847029A (en) * 1992-03-06 1998-12-08 Campbell; Craig C. Method and novel composition board products
GB2317623A (en) * 1996-09-30 1998-04-01 Zafar Javed Bhatti Boards made from agricultural by-products and plastics
DE19647240B4 (en) * 1996-11-15 2005-06-09 Fritz Homann Gmbh & Co. Kg Wood fiber board and process for its production
WO1998025744A1 (en) * 1996-12-11 1998-06-18 Boise Cascade Corporation Apparatus and method for continuous formation of composites having filler and thermoactive materials, and products made by the method
US6605245B1 (en) * 1997-12-11 2003-08-12 Boise Cascade Corporation Apparatus and method for continuous formation of composites having filler and thermoactive materials
AU3825499A (en) * 1998-05-02 1999-11-23 Rudolph, Norbert-W. Moulded elements made of hard coconut shell granulate and method for producing same

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JP2004508967A (en) 2004-03-25
ATE454253T1 (en) 2010-01-15
DE50015837D1 (en) 2010-02-25
EP1226006A1 (en) 2002-07-31
WO2002022331A1 (en) 2002-03-21
CA2389511A1 (en) 2002-03-21
CA2389511C (en) 2007-09-11
ES2338295T3 (en) 2010-05-06
JP4203317B2 (en) 2008-12-24
DK1226006T3 (en) 2010-04-26
US7405248B1 (en) 2008-07-29

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