WO1993021369A1 - Process for producing insulating boards - Google Patents

Process for producing insulating boards Download PDF

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Publication number
WO1993021369A1
WO1993021369A1 PCT/EP1993/000921 EP9300921W WO9321369A1 WO 1993021369 A1 WO1993021369 A1 WO 1993021369A1 EP 9300921 W EP9300921 W EP 9300921W WO 9321369 A1 WO9321369 A1 WO 9321369A1
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WO
WIPO (PCT)
Prior art keywords
binder
fibers
wetted
primary
nonwoven
Prior art date
Application number
PCT/EP1993/000921
Other languages
German (de)
French (fr)
Inventor
Heimo Neuhold
Dieter Lerchbaumer
Original Assignee
Heraklith Baustoffe Aktiengesellschaft
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 Heraklith Baustoffe Aktiengesellschaft filed Critical Heraklith Baustoffe Aktiengesellschaft
Priority to DE4391557A priority Critical patent/DE4391557C1/en
Priority to DE4391557D priority patent/DE4391557D2/en
Publication of WO1993021369A1 publication Critical patent/WO1993021369A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/645—Impregnation followed by a solidification process
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/655—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped

Definitions

  • the invention relates to a method for producing an insulation board from natural fibrous materials with low bulk density.
  • natural fibrous materials or “natural fibers” mean fibers of plant and / or animal origin, for example flax or sheep's wool.
  • the fibrous materials are processed into individual fibers, the individual fibers are wetted with a binder, and the wetted fibers are deposited as a primary nonwoven, whereupon the primary nonwoven is compressed, hardened and processed on the edges and surfaces becomes.
  • the invention avoids the "non-woven" method proposed in the prior art, which works without the addition of binders. It has been surprisingly found that natural fibers of animal or vegetable origin are amenable to wetting with binders r which opens the possibility, instead of directly Dämmvliesen produce insulation boards.
  • bale openers are known from the textile machine sector and can be used here. The preparation is carried out until the fibers are separated as completely as possible. The separated fibers can then be mixed with the binder in an air flow (swirl chamber)
  • the fibers on the surface can be coated particularly easily and completely.
  • the binder is applied to the fibers by means of an immersion bath and dried at temperatures of around 80 degrees Celsius.
  • the fibrous materials particularly if they are sheep's wool, can still be handled like dry wool, i.e. they can be torn, processed into a fleece and subjected to all other treatments which require that the fibers do not stick together.
  • the binder is only activated to bond the fibers in the hardening furnace at a higher temperature, which can be around 150 degrees Celsius.
  • binders based on starch or protein or a curable resin or synthetic resin or a curable resin combination or synthetic resin combination as well as water glass modifications or silicates are suitable in this sense.
  • the thickness and density of the insulation board to be produced can be adjusted, for example, by placing the primary fleece on top of one another in a corresponding number of layers (layers) before compression, for example between rollers or belts.
  • the delivered natural fiber material (here: sheep wool bale) is transferred from a box storage 1 to a conveyor belt 2 with a belt scale 20, the speed of the conveyor belt 2 being adjustable depending on signals emitted by the belt scale 20, so that the quantity of sheep wool can be set is.
  • sheep's wool is roughly broken up between a circulating belt 30 and a plucking roller 32. Then it is fed to a washing system 4.
  • the waste water from the washing system 4 is disposed of directly after a separation of the fat content in a centrifuge 5 via a waste water system 6.
  • the sheep wool cleaned in this way is dried in a drum dryer 7 and then mechanically broken down into individual fibers in a device 8 for the fine dissolution of the fibers between plucking roller pairs 80, 82 or 84, 86.
  • These individual fibers are introduced into a finishing device (coating device) 9 through an opening 90 in the upper region thereof, a fan 92 causing the fibers to be swirled, similarly to a swirl chamber.
  • a fine mist of a binder (here: protein-based) is sprayed onto the surfaces of the fibers by means of a spray device 94, so that these are largely completely wetted by the binder.
  • the wetted individual fibers are drawn off from the device 9 and between a smooth roller 15 and a plucking roller 16 placed on a conveyor belt 17 to form a primary fleece.
  • a system (not shown here), with which the continuously transported primary nonwoven is put on top of one another in several (preselectable) layers, can be connected before the nonwoven is fed to a compression station 10, where it is compressed in the desired manner between rollers 102, 104.
  • the compression station 10 is followed by a hardening furnace 11 in which the binder is dried and / or cured.
  • the thus hardened, dimensionally stable fleece is then processed in a station 12 on the edge side and on the surface, for which purpose trimming and calibration saws are provided.
  • the insulation boards thus finished are stored in a storage device 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Acoustics & Sound (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

A process is disclosed for producing an insulating board made of low apparent density, natural fibrous materials. The natural fibrous materials are separated into individual fibres, the separated fibres are wetted with a binder, the wetted fibres are laid as a primary nonwoven fabric, the primary nonwoven fabric is cured and its edges and surfaces are shaped.

Description

Verfahren zum Herstellen einer Dämmplatte Method of making an insulation board
B e s c h r e i b u n gDescription
Die Erfindung betrifft ein Verfahren zum Herstellen einer Dämmplatte aus natürlichen faserigen Materialien mit niedriger Rohdichte. Unter "natürlichen faserigen Materialien" beziehungsweise "Naturfasern" werden erfindungsgemäß Fasern pflanzlichen und/oder tierischen Ursprungs verstanden, zum Beispiel Flachs oder Schafwolle.The invention relates to a method for producing an insulation board from natural fibrous materials with low bulk density. According to the invention, “natural fibrous materials” or “natural fibers” mean fibers of plant and / or animal origin, for example flax or sheep's wool.
Bei der Verarbeitung von Naturfasern wie Schafwolle werden die lediglich aufgelockerten Faserbündel in Bahnen angeordnet, auf deren Ober- und Unterseiten Filze aufgelegt werden. Eine Nadelanlage erzeugt dann im wesentlichen nur im Bereich der Schafwollvliesbahn ein Wirrvlies, das mit den Filzen in einer Steppanlage vernäht wird. Man erhält so eine Rollenware mit geringer Festigkeit. Um Platten herzustellen, die eine ausreichende Stabilität aufweisen, ist es notwendig, mehrere solcher Filz/Schafwolle-Bahnen miteinander zu verkleben. Dadurch steigt die Rohdichte erheblich .When processing natural fibers such as sheep's wool, the loosened fiber bundles are arranged in webs, on the top and bottom of which felts are placed. A needle system then produces essentially only in the area of the sheep wool nonwoven web a tangled nonwoven which is sewn with the felts in a quilting system. This gives a roll of low strength. In order to produce panels that have sufficient stability, it is necessary to glue several such felt / sheep wool sheets together. This increases the bulk density considerably.
Es ist die Aufgabe der Erfindung, eine Möglichkeit aufzuzeigen, wie unter Verwendung natürlicher Fasern Dämmplatten niedriger Rohdichte und technisch ausreichender Festigkeit hergestellt werden können.It is the object of the invention to show a way how using natural fibers Insulation boards of low bulk density and technically sufficient strength can be produced.
Diese Aufgabe wird von einem Verfahren mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.This object is achieved by a method having the features of patent claim 1. Advantageous refinements are the subject of the dependent claims.
Bei dem erfindungsgemäßen Verfahren zum Herstellen einer Dämmplatte aus natürlichen faserigen Materialien mit niedriger Rohdichte werden die faserigen Materialien zu vereinzelten Fasern aufbereitet, die vereinzelten Fasern mit einem Bindemittel benetzt und die benetzten Fasern als Primärvlies abgelegt, woraufhin das Primärvlies komprimiert, ausgehärtet und rand- und oberflächenbearbeitet wird. Die Erfindung vermeidet dabei das im Stand der Technik vorgeschlagene "non-woven"-Verfahren, das ohne Zugabe von Bindemitteln arbeitet. Es hat sich nämlich überraschenderweise herausgestellt, daß Naturfasern tierischer oder pflanzlicher Herkunft einer Benetzung mit Bindemitteln zugänglich sindr wodurch sich die Möglichkeit erschließt, anstelle von Dämmvliesen direkt Dämmplatten herzustellen.In the method according to the invention for producing an insulation board from natural fibrous materials with a low bulk density, the fibrous materials are processed into individual fibers, the individual fibers are wetted with a binder, and the wetted fibers are deposited as a primary nonwoven, whereupon the primary nonwoven is compressed, hardened and processed on the edges and surfaces becomes. The invention avoids the "non-woven" method proposed in the prior art, which works without the addition of binders. It has been surprisingly found that natural fibers of animal or vegetable origin are amenable to wetting with binders r which opens the possibility, instead of directly Dämmvliesen produce insulation boards.
Eine besondere Bedeutung haben dabei die Verfahrensschritte von der Vereinzelung der Naturfasern bis zur Komprimierung des Primärvlieses. Zum Beispiel Schafwolle wird als "Ballenware" angeliefert. Diese Ballen müssen zunächst aufgebrochen und aufgelockert werden. Aus dem Textilmaschinenbereich sind sogenannte Ballenöffner bekannt, die hier Anwendung finden können. Die Aufbereitung erfolgt derart, bis eine möglichst vollständige Vereinzelung der Fasern erreicht ist. In einem Luftstrom (Wirbelkammer) können die vereinzelten Fasern dann mit dem BindemittelThe process steps from separating the natural fibers to compressing the primary fleece are of particular importance. For example sheep wool is delivered as "bale goods". These bales must first be broken up and loosened up. So-called bale openers are known from the textile machine sector and can be used here. The preparation is carried out until the fibers are separated as completely as possible. The separated fibers can then be mixed with the binder in an air flow (swirl chamber)
TT besprüht werden. Dabei lassen sich die Fasern auf der Oberfläche besonders leicht und vollständig beschichten.TT be sprayed. The fibers on the surface can be coated particularly easily and completely.
Eine weitere Möglichkeit der Bindemittelbeschichtung besteht in der Anwendung des sogenannten Prepreg-Verfahrens . Hier wird das Bindemittel mittels Tauchbad auf die Fasern aufgebracht und bei Temperaturen um etwa 80 Grad Celsius getrocknet. Die faserigen Materialien, insbesondere wenn es sich um Schafwolle handelt, können weiterhin wie trockene Wolle gehandhabt werden, das heißt sie können zerrupft werden, zu einem Vlies aufgearbeitet werden und allen weiteren Behandlungen unterworfen werden, die es erfordern, daß die Fasern nicht aneinanderkleben . Die Aktivierung des Bindemittels zum Verkleben der Fasern erfolgt erst im Härteofen bei höherer Temperatur, die etwa 150 Grad Celsius betragen kann.Another possibility for coating the binder is to use the so-called prepreg process. Here the binder is applied to the fibers by means of an immersion bath and dried at temperatures of around 80 degrees Celsius. The fibrous materials, particularly if they are sheep's wool, can still be handled like dry wool, i.e. they can be torn, processed into a fleece and subjected to all other treatments which require that the fibers do not stick together. The binder is only activated to bond the fibers in the hardening furnace at a higher temperature, which can be around 150 degrees Celsius.
Es hat sich gezeigt, daß Bindemittel auf Stärke- oder Proteinbasis oder ein aushärtbares Harz oder Kunstharz oder eine aushärtbare Harzkombination oder Kunstharzkombination ebenso wie Wasserglasmodifikationen oder Silikate in diesem Sinne geeignet sind.It has been shown that binders based on starch or protein or a curable resin or synthetic resin or a curable resin combination or synthetic resin combination as well as water glass modifications or silicates are suitable in this sense.
Die Dicke und Dichte der herzustellenden Dämmplatte läßt sich zum Beispiel dadurch einstellen, daß vor dem Komprimieren, zum Beispiel zwischen Walzen oder Bändern, das Primärvlies in einer entsprechenden Zahl von Schichten (Lagen) aufeinandergelegt wird.The thickness and density of the insulation board to be produced can be adjusted, for example, by placing the primary fleece on top of one another in a corresponding number of layers (layers) before compression, for example between rollers or belts.
Mit dem Verfahren lassen sich Dämmplatten aus NaturfasernWith the process, insulation boards made of natural fibers
3 mit einer Rohdichte zwischen 30 und 200 kg/m , bevorzugt 303 with a bulk density between 30 and 200 kg / m, preferably 30
3 bis 80 kg/m herstellen. Im folgenden soll die Erfindung beispielhaft anhand der beigefügten Zeichnung näher erläutert werden. Dabei zeigt die einzige Figur - in stark schematisierter Darstellung - eine Vorrichtung, mit der das Verfahren durchgeführt werden kann.Produce 3 to 80 kg / m. The invention will be explained in more detail below by way of example with reference to the accompanying drawing. The only figure shows - in a highly schematic representation - an apparatus with which the method can be carried out.
Das angelieferte Naturfasermaterial (hier: Schafwolleballen) wird aus einem Kastenspeicher 1 auf ein Transportband 2 mit Bandwaage 20 überführt, wobei die Geschwindigkeit des Transportbandes 2 abhängig von Signalen, die von der Bandwaage 20 abgegeben werden, regelbar ist, so daß die Mengenabgabe an Schafwolle einstellbar ist. In einem sich anschließenden Rohwolleöffner 3 wird die Schafwolle grob zwischen einem umlaufenden Band 30 und einer Rupfwalze 32 aufgeschlossen. Anschließend wird sie einer Waschanlage 4 zugeführt. Die Abwässer aus der Waschanlage 4 werden nach Abscheiden des Fettanteils in .einer Zentrifuge 5 über eine Abwasseranlage 6 direkt entsorgt. Die so gereinigte Schaf¬ wolle wird in einem Trommeltrockner 7 getrocknet und dann in einer Vorrichtung 8 für die Feinauflösung der Fasern zwischen Rupfwalzenpaaren 80, 82 beziehungsweise 84, 86 mechanisch zu Einzelfasern aufgeschlossen. Diese Einzelfasern werden in eine Aviviervorrichtung (Beschichtungsvorrichtung) 9 durch eine Öffnung 90 in deren oberem Bereich eingetragen, wobei ein Gebläse 92 für eine Verwirbelung der Fasern sorgt, ähnlich wie in einer Wirbel¬ kammer.The delivered natural fiber material (here: sheep wool bale) is transferred from a box storage 1 to a conveyor belt 2 with a belt scale 20, the speed of the conveyor belt 2 being adjustable depending on signals emitted by the belt scale 20, so that the quantity of sheep wool can be set is. In a subsequent raw wool opener 3, the sheep's wool is roughly broken up between a circulating belt 30 and a plucking roller 32. Then it is fed to a washing system 4. The waste water from the washing system 4 is disposed of directly after a separation of the fat content in a centrifuge 5 via a waste water system 6. The sheep wool cleaned in this way is dried in a drum dryer 7 and then mechanically broken down into individual fibers in a device 8 for the fine dissolution of the fibers between plucking roller pairs 80, 82 or 84, 86. These individual fibers are introduced into a finishing device (coating device) 9 through an opening 90 in the upper region thereof, a fan 92 causing the fibers to be swirled, similarly to a swirl chamber.
Über eine Sprühvorrichtung 94 wird ein feiner Nebel eines Bindemittels (hier: auf Proteinbasis) auf die Oberflächen der Fasern aufgesprüht, so daß diese weitestgehend vollständig vom Bindemittel benetzt werden. Die benetzten vereinzelten Fasern werden aus der Vorrichtung 9 abgezogen und zwischen einer Glattwalze 15 und einer Rupfwalze 16 hindurch unter Bildung eines Primärvlieses auf ein Trans¬ portband 17 gegeben. Eine (hier nicht dargestellte) Anlage, mit der das kontinuierlich antransportierte Primärvlies in mehreren (vorwählbaren) Lagen aufeinandergelegt wird, kann sich anschließen, bevor das Vlies einer Komprimierstation 10 zugeführt wird, wo es zwischen Walzen 102, 104 in gewünschter Weise komprimiert wird.A fine mist of a binder (here: protein-based) is sprayed onto the surfaces of the fibers by means of a spray device 94, so that these are largely completely wetted by the binder. The wetted individual fibers are drawn off from the device 9 and between a smooth roller 15 and a plucking roller 16 placed on a conveyor belt 17 to form a primary fleece. A system (not shown here), with which the continuously transported primary nonwoven is put on top of one another in several (preselectable) layers, can be connected before the nonwoven is fed to a compression station 10, where it is compressed in the desired manner between rollers 102, 104.
Da das Primärvlies zunächst nur als lockerer VerbundSince the primary fleece initially only as a loose composite
(sogenanntes Kardenband) aus benetzten Fasern vorliegt, kann ein großer Wertbereich an Rohdichten eingestellt(so-called card sliver) made of wetted fibers, a large range of raw densities can be set
3 werden, wobei so geringe Dichten wie 30 bis 100 kg/m erreicht werden können.3, with densities as low as 30 to 100 kg / m can be achieved.
Der Komprimierstation 10 nachgeschaltet ist ein Härteofen 11, in dem das Bindemittel getrocknet und/oder ausgehärtet wird. Das so ausgehärtete, formstabile Vlies wird dann in einer Station 12 randseitig und auf der Oberfläche bearbeitet, wozu Besäum- und Kalibriersägen vorgesehen sind. Die so fertiggestellten Dämmplatten werden in einer Speichervorrichtung 13 abgelegt.The compression station 10 is followed by a hardening furnace 11 in which the binder is dried and / or cured. The thus hardened, dimensionally stable fleece is then processed in a station 12 on the edge side and on the surface, for which purpose trimming and calibration saws are provided. The insulation boards thus finished are stored in a storage device 13.
Somit steht erstmals eine Dämmplatte niedriger Rohdichte aus einem natürlichen Fasermaterial wie Schafwolle oder Flachs zur Verfügung. This is the first time that an insulation board with a low bulk density made of a natural fiber material such as sheep wool or flax is available.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zum Herstellen einer Dämmplatte aus natürlichen faserigen Materialien mit einer Rohdichte1. Method for producing an insulation board from natural fibrous materials with a bulk density
3 kleiner 200 kg/m , bei dem3 less than 200 kg / m, where
die faserigen Materialien zu vereinzelten Fasern aufbereitet werden, die vereinzelten Fasern mit einem Bindemittel benetzt werden , die benetzten vereinzelten Fasern als Primärvlies abgelegt werden, das Primärvlies komprimiert und danach ausgehärtet und das ausgehärtete Vlies entsprechend der gewünschtenthe fibrous materials are processed into individual fibers, the individual fibers are wetted with a binder, the wetted individual fibers are deposited as a primary nonwoven, the primary nonwoven is compressed and then cured and the cured nonwoven according to the desired
Plattengeometrie rand- oder oberflächenbearbeitet wird .Plate geometry is machined on the edge or surface.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern im Luftstrom verwirbelt und das Bindemittel aufgesprüht werden.2. The method according to claim 1, characterized in that the fibers are swirled in an air stream and the binder is sprayed on.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Fasern mit dem Bindemittel vorimprägniert, danach bearbeitet und schließlich fixiert werden, wobei zum Fixieren das Bindemittel thermisch aktiviert wird. 3. The method according to claim 1 or 2, characterized in that the fibers are pre-impregnated with the binder, then processed and finally fixed, the binder being thermally activated for fixing.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein Bindemittel auf Stärke- oder Proteinbasis eingesetzt wird.4. The method according to any one of claims 1 to 3, characterized in that a binder based on starch or protein is used.
5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein aushärtbares Harz oder Kunstharz oder eine aushärtbare Harzkombination und/oder Kunstharzkombination als Bindemittel eingesetzt wird.5. The method according to any one of claims 1 to 3, characterized in that a curable resin or synthetic resin or a curable resin combination and / or synthetic resin combination is used as a binder.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Primärvlies vor dem Komprimieren in mehreren Schichten aufeinandergelegt wird.6. The method according to any one of claims 1 to 5, characterized in that the primary fleece is placed on one another in several layers before compression.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als faseriges Material Schafwolle eingesetzt wird.7. The method according to any one of claims 1 to 6, characterized in that sheep wool is used as the fibrous material.
8. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als faseriges Material Flachs eingesetzt wird.8. The method according to any one of claims 1 to 6, characterized in that flax is used as the fibrous material.
ERS ERS
PCT/EP1993/000921 1992-04-16 1993-04-16 Process for producing insulating boards WO1993021369A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4391557A DE4391557C1 (en) 1992-04-16 1993-04-16 Low density insulating board made from natural fibres
DE4391557D DE4391557D2 (en) 1992-04-16 1993-04-16 Method of making an insulation board

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4212828 1992-04-16
DEP4212828.5 1992-04-16
DEP4233791.7 1992-10-07
DE4233791 1992-10-07

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AU (1) AU4040293A (en)
DE (1) DE4391557C1 (en)
WO (1) WO1993021369A1 (en)

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WO1994027796A1 (en) * 1993-05-27 1994-12-08 Biotec Biologische Naturverpackungen Gmbh & Co. Forschungs- Und Entwicklungs Kg Process for producing composite materials from renewable raw materials
AT405195B (en) * 1998-06-24 1999-06-25 Wolfinger Eduard Franz Mag Treatment of natural raw materials for the manufacture of insulants
WO2007131738A1 (en) * 2006-05-17 2007-11-22 Herbert Costard Cuttable and free-flowing natural fiber yarns for smc moulding materials (sheet moulding compounds) and nonwoven strips, method for the production and use thereof

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DE10056829C2 (en) * 2000-06-02 2003-09-25 Steico Ag Process for producing an insulation board or mat made of wood fibers and insulation board or mat produced according to this process
ITBZ20040016A1 (en) * 2004-04-13 2004-07-13 Johann Lang INSULATING PANEL IN SHEEP WOOL AND PROCEDURE FOR ITS REALIZATION.
US7007403B1 (en) * 2004-09-27 2006-03-07 Roy Studebaker Shrouded floor drying fan

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* Cited by examiner, † Cited by third party
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WO1994027796A1 (en) * 1993-05-27 1994-12-08 Biotec Biologische Naturverpackungen Gmbh & Co. Forschungs- Und Entwicklungs Kg Process for producing composite materials from renewable raw materials
US5770137A (en) * 1993-05-27 1998-06-23 Biotec Biologische Naturverpackungen Gmbh & Co. Method for preparing composite materials from renewable raw materials
AT405195B (en) * 1998-06-24 1999-06-25 Wolfinger Eduard Franz Mag Treatment of natural raw materials for the manufacture of insulants
WO2007131738A1 (en) * 2006-05-17 2007-11-22 Herbert Costard Cuttable and free-flowing natural fiber yarns for smc moulding materials (sheet moulding compounds) and nonwoven strips, method for the production and use thereof

Also Published As

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DE4391557C1 (en) 1999-03-25
ATA901893A (en) 1999-07-15
AU4040293A (en) 1993-11-18

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