EP1967338A1 - Wood product and method for its production - Google Patents

Wood product and method for its production Download PDF

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Publication number
EP1967338A1
EP1967338A1 EP08101459A EP08101459A EP1967338A1 EP 1967338 A1 EP1967338 A1 EP 1967338A1 EP 08101459 A EP08101459 A EP 08101459A EP 08101459 A EP08101459 A EP 08101459A EP 1967338 A1 EP1967338 A1 EP 1967338A1
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EP
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Prior art keywords
wood
production
annual plants
husks
grasses
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Granted
Application number
EP08101459A
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German (de)
French (fr)
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EP1967338B1 (en
Inventor
Walter Schiegl
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.)
Fritz Egger GmbH and Co OG
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Fritz Egger GmbH and Co OG
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Publication of EP1967338A1 publication Critical patent/EP1967338A1/en
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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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres

Definitions

  • the invention relates to a method for producing a wood material, in particular a plate-shaped wood material, as well as a wood material produced by the method.
  • Wood-based materials in particular plate-shaped wood-based materials such as chipboard, fiberboard and OSB boards, have been established for many years in various areas of furniture and interior design as well as in construction.
  • the materials mentioned have in common that they are made of small-sized wood or wood fibers, usually with the addition of a natural or chemical binder, by pressing under elevated pressure and elevated temperature.
  • a natural or chemical binder In addition to the use of roundwood, which is worked up to chips, fibers or strands, all sawmill by-products such as sawdust, wood chips, chipboard wood, in the recent past also in importance increasingly used wood, in the production of wood-based materials used.
  • binders are usually based on formaldehyde resins, in the field of OSB boards also of significant importance those based on isocyanates.
  • binders on a natural basis for example on Taninbasis, for certain applications within the wood materials are known.
  • EP 1 121 231 and DE 101 16 686 special processes for the pretreatment of the straw particles used here.
  • special measures are required which should give the straw particles comparable binding properties to the wood particles.
  • the object of the invention is therefore to provide a method and a corresponding wood material, with which the production is simplified using annual plants.
  • the previously derived and indicated object is achieved according to a first teaching of the present invention by a Process for the production of a wood-based material, in particular a plate-shaped wood material, whereby selected parts of annual plants are used for the at least partial substitution of the wood content.
  • a wood material in particular a plate-shaped wood material, which is prepared by a method as described above.
  • the grasses and common grasses have in common that they have no perianth, but the flowers are wrapped in dry-skinned bracts, just the husks. This is also the case with the Sauergrass family.
  • the husks of the oats remain on the grains during the harvest of the oats, which is why the husks are preferably separated from them in a separate working step, in particular before the processing of the oat grains.
  • the availability of oat husks is constant throughout the year and does not depend on harvest times, where otherwise the total annual volume of raw materials of other annual plants is obtained.
  • husks of the oats have a form and extent comparable to the shavings of the middle layer of a chipboard and, after separation from the oat grains, also have a moisture content which is in the range required for the production of chipboard.

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  • 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)

Abstract

The method involves using selected parts of a annual plants for partial substituting of a wood portion, where no precautions are intended for the processing of the parts of a annual plants. Bonding agents are used for the production of the timber products, particularly based on formaldehyde resins.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Holzwerkstoffes, insbesondere eines plattenförmingen Holzwerkstoffes, sowie einen nach dem Verfahren hergestellten Holzwerkstoff.The invention relates to a method for producing a wood material, in particular a plate-shaped wood material, as well as a wood material produced by the method.

Holzwerkstoffe, insbesondere plattentförmige Holzwerkstoffe wie Spanplatten, Faserplatten und OSB-Platten, sind seit vielen Jahren in den verschiedensten Bereichen des Möbel- und Innenausbaues sowie im Bauwesen etabliert. Den genannten Materialien ist gemeinsam, dass sie aus kleinstückigem Holz oder Holzfasern, zumeist unter Zugabe eines natürlichen oder chemischen Bindemittels, durch Verpressen unter erhöhtem Druck und erhöhter Temperatur hergestellt werden. Neben dem Einsatz von Rundholz, das zu Spänen, Fasern oder Strands aufgearbeitet wird, gelangen auch sämtliche Sägenebenprodukte wie Sägespäne, Hackschnitzel, Spreißelholz, in der jüngeren Vergangenheit auch an Bedeutung zunehmend Altholz, bei der Herstellung von Holzwerkstoffen zum Einsatz. Als Bindemittel dienen in der Regel solche auf Basis von Formaldehydharzen, im Bereich der OSB-Platten auch von nennenswerter Bedeutung solche auf Basis von Isocyanaten. Daneben sind auch Bindemittel auf natürlicher Basis, beispielsweise auf Taninbasis, für bestimmte Einsatzbereiche innerhalb der Holzwerkstoffe bekannt.Wood-based materials, in particular plate-shaped wood-based materials such as chipboard, fiberboard and OSB boards, have been established for many years in various areas of furniture and interior design as well as in construction. The materials mentioned have in common that they are made of small-sized wood or wood fibers, usually with the addition of a natural or chemical binder, by pressing under elevated pressure and elevated temperature. In addition to the use of roundwood, which is worked up to chips, fibers or strands, all sawmill by-products such as sawdust, wood chips, chipboard wood, in the recent past also in importance increasingly used wood, in the production of wood-based materials used. As binders are usually based on formaldehyde resins, in the field of OSB boards also of significant importance those based on isocyanates. In addition, binders on a natural basis, for example on Taninbasis, for certain applications within the wood materials are known.

Neben der Verwendung von Holz als Rohstoff zur Herstellung von Holzwerkstoffen ist auch der Einsatz von Einjahrespflanzen zumindest zur teilweisen Substituierung von Holz, hinlänglich bekannt. Um bei Verwendung von Einjahrespflanzen jedoch die erforderlichen mechanischen Eigenschaften der herzustellenden Holzwerkstoffe sicherzustellen, sind hier nach dem Stand der Technik, stets besondere Vorkehrungen erforderlich.In addition to the use of wood as a raw material for the production of wood-based materials, the use of annual plants, at least for the partial substitution of wood, is also well known. However, when using annual plants, the To ensure the required mechanical properties of the wood-based materials to be produced, here, according to the prior art, always special precautions required.

So beschreiben EP 1 121 231 und DE 101 16 686 spezielle Verfahren zur Vorbehandlung der hier eingesetzten Strohpartikel. Um jedoch herkömmliche Bindemittel auf Basis von Formaldehydharzen einzüsetzen, sind spezielle Maßnahmen erforderlich, welche den Strohpartikeln den Holzpartikeln vergleichbare Bindeeigenschaften verleihen sollen. Diese zumeist ein Ausschwemmen besonderer Inhaltsstoffe zum Ziel habenden Vorbehandlungen, sind jedoch stets aufwendig und teuer.So describe EP 1 121 231 and DE 101 16 686 special processes for the pretreatment of the straw particles used here. However, in order to use conventional binders based on formaldehyde resins, special measures are required which should give the straw particles comparable binding properties to the wood particles. These mostly flushing out of special ingredients to target pretreatments, however, are always consuming and expensive.

Als weitere Möglichkeit zur Verwendung von Partikeln aus Einjahrespflanzen beschreibt die EP 1 159 113 verschiedene Möglichkeiten, die jedoch den Einsatz von Bindemitteln auf Basis von Isocyanaten voraussetzen, um zu einer gebrauchstauglichen Platte zu kommen. Bindemittel auf Basis von Isocyanaten sind jedoch beschränkt verfügbar und teuer und werden daher im Bereich der Holzwerkstoffe lediglich dort eingesetzt, wo dies aus Gründen der geforderten Witterungsbeständigkeit und dauerhaften Tragfähigkeit, unbedingt erforderlich ist.Another possibility for the use of particles from annual plants describes the EP 1 159 113 various possibilities, however, require the use of binders based on isocyanates, in order to come to a usable plate. Isocyanate-based binders, however, are available in limited quantities and expensive and are therefore only used in the field of wood-based materials where this is absolutely necessary for reasons of required weathering resistance and lasting load-bearing capacity.

Aufgabe der Erfindung ist es daher, ein Verfahren und einen entsprechenden Holzwerkstoff anzugeben, mit dem die Herstellung unter Verwendung von Einjahrespflanzen vereinfacht wird.The object of the invention is therefore to provide a method and a corresponding wood material, with which the production is simplified using annual plants.

Die zuvor hergeleitete und aufgezeigte Aufgabe wird gemäß einer ersten Lehre der vorliegenden Erfindung gelöst durch ein Verfahren zur Herstellung eines Holzwerkstoffes, insbesondere eines plattenförmigen Holzwerkstoffes, wobei zur zumindest teilweisen Substituierung des Holzanteils ausgewählte Teile von Einjahrespflanzen eingesetzt werden.The previously derived and indicated object is achieved according to a first teaching of the present invention by a Process for the production of a wood-based material, in particular a plate-shaped wood material, whereby selected parts of annual plants are used for the at least partial substitution of the wood content.

Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.Advantageous embodiments are the subject of the dependent claims.

Ferner wird die zuvor hergeleitete und aufgezeigte Aufgabe gemäß einer zweiten Lehre der vorliegenden Erfindung gelöst durch einen Holzwerkstoff, insbesondere einen plattenförmigen Holzwerkstoff, der durch ein Verfahren wie es zuvor beschrieben wird, hergestellt ist.Furthermore, the previously derived and indicated object is achieved according to a second teaching of the present invention by a wood material, in particular a plate-shaped wood material, which is prepared by a method as described above.

Erfindungsgemäß ist erkannt worden, dass bestimmte Teile von Einjahrespflanzen hinsichtlich ihrer Eigenschaften zur Verwendung als Material zur zumindest teilweisen Substituierung von Holz in Holzwerkstoffen ohne eine besondere Vorbehandlung und ohne dem Einsatz eines besonderen Bindemittels verwendet werden können.According to the invention, it has been recognized that certain parts of annual plants can be used in terms of their properties for use as a material for the at least partial substitution of wood in wood-based materials without a special pretreatment and without the use of a special binder.

Insbesondere konnte festgestellt werden, dass Teile der Gattung der Süßgräser und der Riedgräser, insbesondere die Spelzen des Hafers, zur Lösung der erfindungsgemäßen Aufgabe herangezogen werden können.In particular, it has been found that parts of the genus of sweet grasses and reed grasses, in particular the husks of oats, can be used to achieve the object according to the invention.

Den Süßgräsern und Riedgräsern gemeinsam ist, dass diese keine Blütenhülle aufweisen, die Blüten aber in trockenhäutige Tragblättern, eben den Spelzen, eingehüllt sind. Dies ist auch bei den Sauergrasgewächsen so.The grasses and common grasses have in common that they have no perianth, but the flowers are wrapped in dry-skinned bracts, just the husks. This is also the case with the Sauergrass family.

Allerdings werden diese keiner industriellen Nutzung zugeführt, weshalb deren Verfügbarkeit eingeschränkt ist. Da jedoch wesentliche Weizensorten zu den Süßgräsern gehören, insbesondere Gerste, Hafer, Hirse, Mais, Roggen, etc., fallen deren Spelzen in ausreichendem Maß an, sodass diese zur zumindest teilweisen Substituierung von Holz in Holzwerkstoffen herangezogen werden können.However, these are not used for industrial purposes, which is why their availability is limited. However, since significant wheat varieties are among the grasses, especially barley, oats, millet, corn, rye, etc., their husks are sufficiently abundant, so that they can be used for at least partial substitution of wood in wood materials.

Die Spelzen des Hafers verbleiben bei der Ernte des Hafers an den Körnern, weswegen die Spelzen vorzugsweise in einem eigenen Arbeitsschritt, insbesondere vor der Verarbeitung der Haferkörner, von diesen getrennt werden. Damit ist die Verfügbarkeit von Spelzen des Hafers über das gesamte Jahr hinweg konstant gegeben und nicht von Erntezeiten abhängig, wo sonst das jährliche Gesamtvolumen von Rohstoffen anderer Einjahrespflanzen gesamt anfällt. Darüber hinaus vorteilhaft an den Spelzen des Hafers, zur zumindest teilweisen Substituierung von Holz aus Holzwerkstoffen, ist, dass diese einen dem Holz vergleichbar hohen Zelluloseanteil sowie einen vergleichbar hohen Anteil an Xylan aufweisen.The husks of the oats remain on the grains during the harvest of the oats, which is why the husks are preferably separated from them in a separate working step, in particular before the processing of the oat grains. Thus, the availability of oat husks is constant throughout the year and does not depend on harvest times, where otherwise the total annual volume of raw materials of other annual plants is obtained. In addition, it is advantageous for the husks of the oats to at least partially substitute wood from wood-based materials that they have a cellulose content that is comparably high to the wood and a comparatively high proportion of xylan.

Weiters haben Spelzen des Hafers einen den Spänen der Mittelschicht einer Spanplatte vergleichbare Form und Ausdehnung und weisen nach der Trennung von den Haferkörnern auch einen Feuchtegehalt, der im, für die Herstellung von Spanplatten, erfoderlichen Bereich liegt, auf.Furthermore, husks of the oats have a form and extent comparable to the shavings of the middle layer of a chipboard and, after separation from the oat grains, also have a moisture content which is in the range required for the production of chipboard.

Neben den positiven Eigenschaften der Haferspelzen hinsichtlich deren chemischem Aufbau, deren Abmessungen und Feuchtegehalt, hat sich auch deren Vermögen, hinsichtlich ihrer Bindeeigenschaften mit den für die Herstellung von Holzwerkstoffen üblicherweise verwendeten Bindemitteln auf Basis von Formaldehydharzen, als besonders geeignet erwiesen.In addition to the positive properties of the oat husks in terms of their chemical structure, their dimensions and moisture content, their ability, with regard to their binding properties with those for the production of Wood materials commonly used binders based on formaldehyde resins, proved to be particularly suitable.

Neben der Verwendung von Spelzen aus Ried- und Süßgräsern bei der Herstellung von Spanplatten, ist aber auch deren Einsatz zur zumindest teilweisen Substituierung von Holz in Faser- und OSB-Platten möglich.In addition to the use of husks from Ried and Süßgräsern in the production of particleboard, but also their use for at least partial substitution of wood in fiber and OSB boards is possible.

Claims (6)

Verfahren zur Herstellung eines Holzwerkstoffes, insbesondere eines plattenförmigen Holzwerkstoffes, dadurch gekennzeichnet, dass zur zumindest teilweisen Substituierung des Holzanteils ausgewählte Teile von Einjahrespflanzen eingesetzt werden.Method for producing a wood-based material, in particular a plate-shaped wood material, characterized in that selected parts of annual plants are used for at least partial substitution of the wood content. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass keine Vorkehrungen zur Aufarbeitung der Teile der Einjahrespflanzen vorgesehen sind.A method according to claim 1, characterized in that no provision is made for processing the parts of the annual plants. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein oder mehrere Bindemittel zur Herstellung des Holzwerkstoffes, insbesondere auf Basis von Formaldehydharzen, angewendet werden.A method according to claim 1 or 2, characterized in that one or more binders for the production of the wood material, in particular based on formaldehyde resins, are used. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die ausgewählten Teile der Einjahrespflanzen Spelzen, insbesondere von Süßgräsern und/oder Riedgräsern, sind.Method according to one of the preceding claims, characterized in that the selected parts of the annual plants are husks, in particular of grasses and / or reed grasses. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die ausgewählten Teile der Einjahrespflanzen Spelzen des Hafers sind.A method according to claim 4, characterized in that the selected parts of the annual plants are husks of the oat. Holzwerkstoff, insbesondere plattenförmiger Holzwerkstoff, hergestellt durch ein Verfahren nach einem der vorangehenden Ansprüche.Wood material, in particular plate-shaped wood material, produced by a method according to one of the preceding claims.
EP20080101459 2007-03-07 2008-02-11 Wood product and method for its production Active EP1967338B1 (en)

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DE102007011497.6A DE102007011497B4 (en) 2007-03-07 2007-03-07 Wood material and process for its production

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EP1967338B1 EP1967338B1 (en) 2013-04-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020122805A1 (en) 2018-12-14 2020-06-18 Organoclick Ab Biocomposite material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012002588U1 (en) * 2012-03-13 2013-06-17 Uwe D'Agnone grass paper

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US3930089A (en) * 1972-12-14 1975-12-30 Cor Tech Res Ltd Processes for making composite rice hull-resin articles, products thereof, processes for making resin-coated rice hulls and products thereof
US5354621A (en) * 1992-07-02 1994-10-11 Beltec International Biodegradable construction material and manufacturing method
US5688448A (en) * 1993-03-24 1997-11-18 The Illinois Institute Of Technology Method for producing biodegradable products
US5897827A (en) * 1997-08-22 1999-04-27 Chen; Chun-Huei Method for manufacturing food containers
EP1121231A1 (en) 1998-10-16 2001-08-08 Darren J. Kostiw Process for the production of articles from treated lignocellulosic particles and binder
EP1159113A1 (en) 1999-03-05 2001-12-05 Dieffenbacher GmbH & Co. KG Method of producing panel-shaped products
DE10116686A1 (en) 2001-04-03 2002-10-17 P & T Gmbh Projekt Und Technol Process for the preparation of straw and other annual plants for the production of fiberboard, chipboard and insulation boards as well as wall elements and other molded parts and process for the production of fiberboard, chipboard and insulation boards as well as wall elements and other molded parts

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DE19543635A1 (en) * 1995-11-23 1997-05-28 Hp Chemie Pelzer Res & Dev Composite materials made from polyhydroxy fatty acids and fiber materials
DE19718352A1 (en) * 1997-05-02 1998-11-12 Hymmen Theodor Gmbh Method of manufacturing boards or profiled workpieces from annual crops such as flax, straw, hemp, sugar cane etc
DE19740676C2 (en) * 1997-09-16 2003-07-17 Fraunhofer Ges Forschung Process for gluing fibers
DE102004062649C5 (en) * 2004-12-21 2013-06-06 Kronotec Ag Process for the production of a wood fiber insulation board or mats and wood fiber insulation boards or mats produced by this process

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930089A (en) * 1972-12-14 1975-12-30 Cor Tech Res Ltd Processes for making composite rice hull-resin articles, products thereof, processes for making resin-coated rice hulls and products thereof
US5354621A (en) * 1992-07-02 1994-10-11 Beltec International Biodegradable construction material and manufacturing method
US5688448A (en) * 1993-03-24 1997-11-18 The Illinois Institute Of Technology Method for producing biodegradable products
US5897827A (en) * 1997-08-22 1999-04-27 Chen; Chun-Huei Method for manufacturing food containers
EP1121231A1 (en) 1998-10-16 2001-08-08 Darren J. Kostiw Process for the production of articles from treated lignocellulosic particles and binder
EP1159113A1 (en) 1999-03-05 2001-12-05 Dieffenbacher GmbH & Co. KG Method of producing panel-shaped products
DE10116686A1 (en) 2001-04-03 2002-10-17 P & T Gmbh Projekt Und Technol Process for the preparation of straw and other annual plants for the production of fiberboard, chipboard and insulation boards as well as wall elements and other molded parts and process for the production of fiberboard, chipboard and insulation boards as well as wall elements and other molded parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020122805A1 (en) 2018-12-14 2020-06-18 Organoclick Ab Biocomposite material

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EP1967338B1 (en) 2013-04-03
DE102007011497A1 (en) 2008-09-11
DE102007011497B4 (en) 2015-07-30

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