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WO1998042485A1 - Method for impregnating flat fibrous structures with reactive multi-constituent systems - Google Patents

Method for impregnating flat fibrous structures with reactive multi-constituent systems Download PDF

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Publication number
WO1998042485A1
WO1998042485A1 PCT/EP1998/001732 EP9801732W WO9842485A1 WO 1998042485 A1 WO1998042485 A1 WO 1998042485A1 EP 9801732 W EP9801732 W EP 9801732W WO 9842485 A1 WO9842485 A1 WO 9842485A1
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WO
WIPO (PCT)
Prior art keywords
components
component
fiber
fiber structures
oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1998/001732
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German (de)
French (fr)
Inventor
Rainer Gardill
Rüdiger Poltrock
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.)
Megatech Industries Deutschland GmbH
Original Assignee
EMPE Findlay Industries GmbH
Findlay Industries Deutschland GmbH
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Filing date
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Publication of WO1998042485A1 publication Critical patent/WO1998042485A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D04H1/655—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • 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
    • D04H1/587—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 characterised by the bonding agents used
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/70—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
    • D06M15/705—Embossing; Calendering; Pressing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres

Definitions

  • the present invention relates to a method for impregnating and / or coating flat fiber structures with reactive multicomponent systems, in which components of the multicomponent system are applied to fiber structures and fiber structures are pressed.
  • Reactive multicomponent systems - or more specifically multicomponent resin systems - are characterized in that the individual components are not reactive under normal circumstances, or are reactive only to a specific or limited extent, whereas the multicomponent system hardens more or less quickly after the individual components have been mixed.
  • the reactive multicomponent systems can be applied by first mixing the components and then applying the mixed multicomponent system to the fiber structure, whereupon the article is transported into an open pressing tool, which is then closed.
  • the already mixed multicomponent system is inserted into the closed pressing tool via a filling hole, e.g. a mixing chamber sprue combination introduced (RIM technology).
  • Reactive multi-component systems preferably EP and PUR
  • EP and PUR can be processed in different ways:
  • Polyurethane elastomers are preferably produced using the casting process.
  • the components are all mixed in a mixing head after gravimetric or volumetric dosing and then poured into open molds.
  • pre-adducts prepolymers
  • prepolymers are first produced by a first mixing, which then in a second process step with glycols or amines to form elastomers.
  • the uniformity of the distribution of the multi-component system on flat fiber structures can be improved by using a spray application method.
  • the reactive components are continuously fed to a mixing head via pump systems (either high-pressure or low-pressure machines) and sprayed onto the elements to be coated.
  • the coated elements or their blanks are then immediately formed and hardened in a heated tool.
  • the spray application method proves to be disadvantageous in that the spray sequence or the spray pattern has to be controlled in a complex manner in order to obtain a uniform distribution and impregnation.
  • the system parts (grippers, support plates, spray booth walls, etc.) are heavily soiled by an unavoidable overspray.
  • the polymerization reaction begins immediately after the individual components have been mixed, so that the subsequent processing steps are subject to time restrictions due to the low storage stability until the resin system has gelled.
  • the limited storage stability is characterized by the so-called "pot life".
  • the object of the present invention is therefore to provide a method which avoids the heavy contamination of systems and at the same time eliminates the time limit due to the limited pot life.
  • this object is achieved in that the components are applied to the flat fiber structures in spatially and temporally separate process steps.
  • the fiber structures are preferably transported into a pressing tool in which the pressing process takes place.
  • the fiber structure is cut after the components have been applied and before the fiber structure is pressed in a pressing tool, for example by means of a water jet.
  • the roller arrangements are preferably calender rollers.
  • the method proves to be particularly advantageous if, when the components are applied to a fiber structure, the metering is carried out by means of the roller spacing and / or roller diameter.
  • the moisture contained in the natural fiber can be continuously determined and used for the reaction with one of the resin components, the dosage of the components depending on the moisture content in the fiber structures. It has also proven to be advantageous if the components of the multicomponent system are completely reacted by applying pressure and heat.
  • the application of pressure and heat will preferably take place in the press tool.
  • the method according to the invention shows further advantages if at least the component of the multicomponent system applied first does not react with the ambient air.
  • the heating can take place, for example, before the component is applied by heating the component itself and / or by heating the roller arrangement.
  • the method according to the invention is particularly suitable for impregnating and / or coating compressible, porous fiber structures.
  • Flax, jute and sisal fibers are preferably used in pure form or as a fiber mixture for producing the nonwovens.
  • other plant fibers such as hemp, kenaf, coconut, rami, nettle, reed, wood, wood pulp and cotton, can also be used for the natural fiber fleeces used.
  • the fiber structures consisting of these fibers preferably have a weight per unit area between 500 and 2000 g / m 2 .
  • the method proves to be particularly advantageous if the multicomponent system is a two-component polyurethane system.
  • the stoichiometric mixing ratio of the component applied first to the second component is preferably between 100: 120 and 100: 200.
  • the multi-component system has one or more components made from pure or chemically modified vegetable oils, such as rapeseed oil, soybean oil, castor oil, sunflower oil and / or linseed oil.
  • the vegetable oil which is advantageously used contains a high proportion of C 18 fatty acids.
  • the process also has particular advantages in that the wetting properties of the components of the multicomponent system can be matched to the properties of the natural fibers by a suitable selection of the vegetable oil component.
  • the viscosity range of the components of the multi-component system is advantageously between 200 and 5000 mPa sec.
  • the invention is based on the surprising finding that it is advantageous to apply the components of the multicomponent system to the fiber structure to be coated or impregnated in a multistage process.
  • This multi-stage process does not lead to premature mixing and the resulting premature gelation of the system. It is hereby excluded that an undesirable change in the coated or impregnated fiber structure occurs before the actual shaping and curing process, which would make further processing difficult or impossible.
  • This can be particularly advantageous if there are process interruptions. Especially if an applied one Component does not react with the ambient air, the fiber structure soaked or coated with it is stable over the period of a normal production interruption without any significant changes.
  • the components are applied separately, preferably by means of roller arrangements, to the flat structure, an exact metering of the components is possible; the mixing ratio of the components can be varied even during the actual production process. On the one hand, this variation possibility can be used to optimize the properties of the end product, on the other hand, it enables a further disadvantage of the prior art to be countered.
  • the conditioning essentially consists of predrying.
  • One is able to continuously measure the moisture of the incoming fiber structures and to vary the dosage of the components depending on this.
  • the isocyanate of the polyurethane system reacts in a side reaction with the moisture to form carbon dioxide, which causes an advantageous foaming of the resin during the reaction.
  • Such a known foaming process for polyurethanes can now be used in connection with the process according to the invention, which in particular It becomes unnecessary to supply the fiber structure to the process in a dry state.
  • vegetable oils or products made therefrom are used as one of the reactive resin components.
  • Such a replacement for petrochemical products can increase the proportion of renewable raw materials in the molded part up to 80%.
  • Figure 1 is a schematic representation of a method according to the present invention.
  • the method according to the invention is shown schematically in FIG.
  • the fiber mats 2 are supplied as rolls to the process on rolls 4.
  • the unwound fiber mat is first coated or impregnated with a first reactive component in a first roller arrangement 6 and, after passing through a further transport path, provided with a second component in a second roller arrangement 8.
  • the roller arrangement 6, 8 are preferably of the type of a calender roller. The amount of the components can be determined by the distance between the rollers and their diameter within the roller arrangements 6, 8.
  • the blanks are transported via the subsequent transport paths 12, 14, 16 into the presses 18, 20, 22, in which the pressing and possibly simultaneous heating take place.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The invention relates to a method for impregnating and/or coating flat fibrous structures (2) with multi-constituent systems, wherein the constituents of said systems are applied to fibrous structures which are then pressed. The inventive method includes separate physical and chronological steps for application on said structures.

Description

VERFAHREN ZUM TRÄNKEN FLÄCHIGER FASERGEBILDE MIT REAKTIVEN MEHRKOMPONENTENSYSTEMEN METHOD FOR WATERING LARGE FIBER FABRICS WITH REACTIVE MULTI-COMPONENT SYSTEMS

Die vorliegende Erfindung betrifft ein Verfahren zum Tränken und/oder Beschichten flächiger Fasergebilde mit reaktiven Mehrkomponentensystemen, bei welchem Komponenten des Mehrkomponentensystems auf Fasergebilde aufgetragen werden und Fasergebilde gepreßt werden.The present invention relates to a method for impregnating and / or coating flat fiber structures with reactive multicomponent systems, in which components of the multicomponent system are applied to fiber structures and fiber structures are pressed.

Reaktive Mehrkomponentensysteme - oder spezieller Mehrkomponenten- Harzsysteme - zeichnen sich dadurch aus, daß die einzelnen Komponenten unter normalen Umständen nicht oder nur spezifisch bzw. eingeschränkt reaktiv sind, wohingegen das Mehrkomponentensystem nach der Vermischung der einzelnen Komponenten mehr oder weniger rasch aushärtet.Reactive multicomponent systems - or more specifically multicomponent resin systems - are characterized in that the individual components are not reactive under normal circumstances, or are reactive only to a specific or limited extent, whereas the multicomponent system hardens more or less quickly after the individual components have been mixed.

Bei den gattungsgemäßen Verfahren zum Tränken und/oder Beschichten von flächigen Formartikeln kann das Auftragen der reaktiven Mehrkomponentensysteme dadurch erfolgen, daß die Komponenten zunächst vermischt werden und anschließend das vermischte Mehrkomponentensystem auf das Fasergebilde aufgetragen wird, woraufhin ein Transport des Artikels in ein offenes Preßwerkzeug erfolgt, welches im Anschluß daran geschlossen wird. Bei einem anderen bekannten Verfahren wird das bereits vermischte Mehrkomponentensystem in das geschlossene Preßwerkzeug über ein Fülloch, z.B. eine Mischkammer-Anguß-Kombination eingebracht (RIM-Technologie).In the generic methods for impregnating and / or coating flat shaped articles, the reactive multicomponent systems can be applied by first mixing the components and then applying the mixed multicomponent system to the fiber structure, whereupon the article is transported into an open pressing tool, which is then closed. In another known method, the already mixed multicomponent system is inserted into the closed pressing tool via a filling hole, e.g. a mixing chamber sprue combination introduced (RIM technology).

Die Verarbeitung von reaktiven Mehrkomponentensystemen (vorzugsweise EP und PUR) kann auf verschiedene Arten erfolgen:Reactive multi-component systems (preferably EP and PUR) can be processed in different ways:

Polyurethan-Elastomere werden bevorzugt im Gießverfahren hergestellt. Man unterscheidet hier zwei verschiedene Technologien, einmal das sogenannte One- Shot-Gießverfahren sowie das Zwei-Stufen-Gießverfahren. Beim One-Shot- Gießverfahren werden die Komponenten nach gravimetrischer oder volumetrischer Dosierung alle gleichzeitig in einem Mischkopf gemischt und dann in offene Formen gegossen. Beim Zwei-Stufen-Gießverfahren werden zunächst durch eine erste Vermischung Voraddukte (Prepolymere) hergestellt, die dann in einem zweiten Verfahrensschritt mit Glykolen oder Aminen zu Elastomeren umgesetzt werden.Polyurethane elastomers are preferably produced using the casting process. A distinction is made between two different technologies, the so-called one-shot casting process and the two-stage casting process. In the one-shot casting process, the components are all mixed in a mixing head after gravimetric or volumetric dosing and then poured into open molds. In the two-stage casting process, pre-adducts (prepolymers) are first produced by a first mixing, which then in a second process step with glycols or amines to form elastomers.

Diese Gießverfahren sind jedoch für die Herstellung harter, faserverstärkter und dünnwandiger Formteile, zum Beispiel für Automobilinnenverkleidungsteile, Möbelteile und dergleichen nur wenig geeignet, da es sich als problematisch erweist, das vermischte Mehrkomponentensystem auf der Fasermatte gleichmäßig zu verteilen bzw. diese gleichmäßig damit zu tränken. Dies gilt gleichermaßen für das One-Shot-Gießverfahren, das Zwei-Stufen-Verfahren sowie die RIM-Technologie.However, these casting methods are not very suitable for the production of hard, fiber-reinforced and thin-walled molded parts, for example for automotive interior trim parts, furniture parts and the like, since it proves problematic to evenly distribute the mixed multi-component system on the fiber mat or to soak it evenly with it. This applies equally to the one-shot casting process, the two-step process and RIM technology.

Die Gleichmäßigkeit der Verteilung des Mehrkomponentensystems auf flächigen Fasergebilden kann dadurch verbessert werden, daß ein Sprühauftrageverfahren verwendet wird. Hierbei werden die reaktiven Komponenten über Pumpsysteme (wahlweise Hochdruck- oder Niederdruckmaschinen) kontinuierlich einem Mischkopf zugeführt und auf die zu beschichtenden Elemente gesprüht. Die beschichteten Elemente oder deren Zuschnitte werden anschließend sofort in einem beheizten Werkzeug umgeformt und ausgehärtet. Allerdings erweist sich das Sprühauftrageverfahren insofern als nachteilig, de der Sprühablauf bzw. das Sprühbild aufwendig gesteuert werden muß, um eine gleichmäßige Verteilung und Durchtränkung zu erhalten. Weiterhin werden die Anlagenteile (Greifer, Auflageplatten, Spritzkabinenwände usw.) durch ein nicht zu vermeidendes Übersprühen (Overspray) stark verschmutzt.The uniformity of the distribution of the multi-component system on flat fiber structures can be improved by using a spray application method. The reactive components are continuously fed to a mixing head via pump systems (either high-pressure or low-pressure machines) and sprayed onto the elements to be coated. The coated elements or their blanks are then immediately formed and hardened in a heated tool. However, the spray application method proves to be disadvantageous in that the spray sequence or the spray pattern has to be controlled in a complex manner in order to obtain a uniform distribution and impregnation. Furthermore, the system parts (grippers, support plates, spray booth walls, etc.) are heavily soiled by an unavoidable overspray.

Allen vorgenannten Verfahren ist gemeinsam, daß die Komponenten des reaktiven Mehrkomponentensystems zunächst gemischt werden und danach auf die zu beschichtenden Elemente aufgebracht werden.All of the aforementioned processes have in common that the components of the reactive multicomponent system are first mixed and then applied to the elements to be coated.

Direkt nach der Vermischung der Einzelkomponenten beginnt die Polymeri- sationsreaktion, so daß die folgenden Verarbeitungsschritte infolge der geringen Lagerstabilität bis zur Angelierung des Harzsystems zeitlichen Beschränkungen unterworfen sind. Die begrenzte Lagerstabilität ist durch die sogenannte „Topfzeit" gekennzeichnet. Die Aufgabe der vorliegenden Erfindung besteht demnach darin, ein Verfahren zur Verfügung zu stellen, welches die starke Verschmutzung von Anlagen vermeidet und gleichzeitig die zeitliche Limitierung aufgrund der begrenzten Topfzeit ausschaltet.The polymerization reaction begins immediately after the individual components have been mixed, so that the subsequent processing steps are subject to time restrictions due to the low storage stability until the resin system has gelled. The limited storage stability is characterized by the so-called "pot life". The object of the present invention is therefore to provide a method which avoids the heavy contamination of systems and at the same time eliminates the time limit due to the limited pot life.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das Auftragen der Komponenten auf die flächigen Fasergebilde in räumlich und zeitlich getrennten Verfahrensschritten erfolgt.According to the invention, this object is achieved in that the components are applied to the flat fiber structures in spatially and temporally separate process steps.

Es ist vorteilhaft, wenn das Auftragen der Komponenten auf die Fasergebilde mittels Walzenanordnungen erfolgt.It is advantageous if the components are applied to the fiber structures by means of roller arrangements.

Bevorzugt werden die Fasergebilde im Anschluß an das Auftragen der Komponenten in ein Preßwerkzeug transportiert, in welchem der Preßvorgang stattfindet.Following the application of the components, the fiber structures are preferably transported into a pressing tool in which the pressing process takes place.

In einer besonderen Ausführungsform wird das Fasergebilde nach dem Auftragen der Komponenten und vor dem Pressen des Fasergebildes in einem Preß- Werkzeug zugeschnitten, zum Beispiel mittels eines Wasserstrahls.In a special embodiment, the fiber structure is cut after the components have been applied and before the fiber structure is pressed in a pressing tool, for example by means of a water jet.

Bei den Walzenanordnungen handelt es sich bevorzugt um Kalanderwalzen.The roller arrangements are preferably calender rollers.

Das Verfahren erweist sich als besonders vorteilhaft, wenn beim Auftragen der Komponenten auf ein Fasergebilde die Dosierung mittels des Walzenabstandes und/oder Walzendurchmessers vorgenommen wird.The method proves to be particularly advantageous if, when the components are applied to a fiber structure, the metering is carried out by means of the roller spacing and / or roller diameter.

Ferner kann die in der Naturfaser enthaltene Feuchtigkeit kontinuierlich bestimmt und für die Reaktion mit einer der Harzkomponenten genutzt werden, wobei die Dosierung der Komponenten in Abhängigkeit des Feuchtigkeitsgehaltes in den Fasergebilden erfolgt. Weiterhin hat sich als vorteilhaft erwiesen, wenn die vollständige Reaktion der Komponenten des Mehrkomponentensystems durch Druck- und Wärmebeaufschlagung erfolgt.Furthermore, the moisture contained in the natural fiber can be continuously determined and used for the reaction with one of the resin components, the dosage of the components depending on the moisture content in the fiber structures. It has also proven to be advantageous if the components of the multicomponent system are completely reacted by applying pressure and heat.

Die Druck- und Wärmebeaufschlagung wird bevorzugt in dem Preßwerkzeug stattfinden.The application of pressure and heat will preferably take place in the press tool.

Weitere Vorteile zeigt das erfindungsgemäße Verfahren, wenn zumindest die zuerst aufgetragene Komponente des Mehrkomponentensystems nicht mit der Umgebungsluft reagiert.The method according to the invention shows further advantages if at least the component of the multicomponent system applied first does not react with the ambient air.

Ferner ist es vorteilhaft, wenn zumindest die zuerst aufgetragene Komponente erwärmt wird.It is also advantageous if at least the component applied first is heated.

Die Erwärmung kann zum Beispiel vor dem Auftragen der Komponente durch die Erwärmung der Komponente selbst erfolgen und/oder durch eine Beheizung der Walzenanordnung.The heating can take place, for example, before the component is applied by heating the component itself and / or by heating the roller arrangement.

Das erfindungsgemäße Verfahren eignet sich besonders zum Tränken und/oder Beschichten verdichtbarer, poröser Fasergebilde.The method according to the invention is particularly suitable for impregnating and / or coating compressible, porous fiber structures.

Bevorzugt werden zur Herstellung der Faservliese Flachs-, Jute- und Sisalfasern in reiner Form oder als Fasermischung verwendet. Ferner können für die eingesetzten Naturfaservliese auch andere Pflanzenfasern, wie zum Beispiel Hanf, Kenaf, Kokos, Rami, Nessel, Schilf, Holz, Holzschliff und Baumwolle verwendet werden.Flax, jute and sisal fibers are preferably used in pure form or as a fiber mixture for producing the nonwovens. Furthermore, other plant fibers, such as hemp, kenaf, coconut, rami, nettle, reed, wood, wood pulp and cotton, can also be used for the natural fiber fleeces used.

Die aus diesen Fasern bestehenden Fasergebilde weisen vorzugsweise ein Flächengewicht zwischen 500 und 2000 g/m2 auf.The fiber structures consisting of these fibers preferably have a weight per unit area between 500 and 2000 g / m 2 .

Als besonders vorteilhaft erweist sich das Verfahren, wenn es sich bei dem Mehrkomponentensystem um ein Zweikomponenten-Polyurethansystem handelt. Vorzugsweise liegt das stöchiometrische Mischungsverhältnis der zuerst aufgetragenen Komponente zu der zweiten Komponente zwischen 100 : 120 und 100 : 200.The method proves to be particularly advantageous if the multicomponent system is a two-component polyurethane system. The stoichiometric mixing ratio of the component applied first to the second component is preferably between 100: 120 and 100: 200.

Ferner ist es vorteilhaft, wenn das Mehrkomponentensystem eine oder mehrere Komponenten aus reinem oder chemisch modifizierten Pflanzenölen, wie Rapsöl, Sojaöl, Rizinusöl, Sonnenblumenöl und/oder Leinöl aufweist.It is also advantageous if the multi-component system has one or more components made from pure or chemically modified vegetable oils, such as rapeseed oil, soybean oil, castor oil, sunflower oil and / or linseed oil.

Das vorteilhafterweise eingesetzte Pflanzenöl enthält einen hohen Anteil an C18- Fettsäuren.The vegetable oil which is advantageously used contains a high proportion of C 18 fatty acids.

Besondere Vorzüge hat das Verfahren auch dadurch, daß die Benetzungseigenschaften der Komponenten des Mehrkomponentensystems durch eine geeignete Auswahl der Pflanzenölkomponente auf die Eigenschaften der Naturfasern hin abgestimmt werden können.The process also has particular advantages in that the wetting properties of the components of the multicomponent system can be matched to the properties of the natural fibers by a suitable selection of the vegetable oil component.

Vorteilhaft liegt der Viskositätsbereich der Komponenten des Mehrkomponentensystems zwischen 200 und 5000 mPa sec.The viscosity range of the components of the multi-component system is advantageously between 200 and 5000 mPa sec.

Besonders vorteilhaft ist. es, daß durch die kontrollierte Dosiermöglichkeit der Komponenten des Mehrkomponentensystems die Möglichkeit besteht, physikalische und/oder chemische Eigenschaften des Endprodukts zu beeinflussen.It is particularly advantageous. it is that the controlled dosing of the components of the multicomponent system enables the physical and / or chemical properties of the end product to be influenced.

Der Erfindung liegt die überraschende Erkenntnis zugrunde, daß es vorteilhaft ist, die Komponenten des Mehrkomponentensystems in einem mehrstufigen Prozeß auf das zu beschichtende bzw. zu tränkende Fasergebilde aufzubringen. Durch diesen mehrstufigen Prozeß kommt es nicht zu einer frühzeitigen Mischung und einer dadurch bedingten frühzeitigen Gelierung des Systems. Es wird hierdurch ausgeschlossen, daß vor dem eigentlichen Verform- und Aushärteprozeß eine unerwünschte Veränderung des beschichteten bzw. getränkten Fasergebildes auftritt, die die weitere Verarbeitung erschweren oder unmöglich machen würde. Dies kann insbesondere dann vorteilhaft sein, wenn es zu Verfahrensunterbrechungen kommt. Speziell, wenn eine aufgetragene Komponente nicht mit der Umgebungsluft reagiert, ist das damit getränkte oder beschichtete Fasergebilde über den Zeitraum einer gewöhnlichen Produktionsunterbrechung hinaus ohne wesentliche Veränderungen beständig.The invention is based on the surprising finding that it is advantageous to apply the components of the multicomponent system to the fiber structure to be coated or impregnated in a multistage process. This multi-stage process does not lead to premature mixing and the resulting premature gelation of the system. It is hereby excluded that an undesirable change in the coated or impregnated fiber structure occurs before the actual shaping and curing process, which would make further processing difficult or impossible. This can be particularly advantageous if there are process interruptions. Especially if an applied one Component does not react with the ambient air, the fiber structure soaked or coated with it is stable over the period of a normal production interruption without any significant changes.

Dadurch, daß die Komponenten getrennt, vorzugsweise mittels Walzenanordnungen, auf das Flächengebilde aufgetragen werden, ist eine exakte Dosierung der Komponenten möglich; selbst während des eigentlichen Produktionsvorganges kann so das Mischungsverhältnis der Komponenten variiert werden. Diese Variationsmöglichkeit kann einerseits ausgenutzt werden, um die Eigenschaften des Endprodukts zu optimieren, andererseits ermöglicht sie, einem weiteren Nachteil des Standes der Technik entgegenzutreten. Bisher war es erforderlich, um eine Undefinierte Reaktion der Reaktionskomponenten mit Inhaltsstoffen des zu beschichtenden Fasergebildes zu vermeiden, dieses vor der Beschichtung bzw. Tränkung zu konditionieren. Die Konditionierung besteht im wesentlichen in einer Vortrocknung. Allerdings läßt sich eine nachfolgende Feuchtigkeitsaufnahme, welche je nach Faserart, Faserzusammensetzung und Umgebungsbedingungen zwischen 4 und 15 Gewichtsprozent beträgt und bei porösen Fasergebilden sehr rasch erfolgt, nur mit großem technischen Aufwand vermeiden. Diese erneute Feuchtigkeitsaufnahme, die durch Saug- und Kapillareffekte innerhalb weniger Minuten ein beträchtliches Maß erreicht, wird dann die nachfolgende Verarbeitung in unvorhersehbarer Weise beeinflussen. Aufgrund der Dosiermöglichkeit der Einzelkomponenten während des Auftrageprozesses, welche sich aus der vorliegenden Erfindung ergibt, ist es nun möglich, auf eine Konditionierung des Fasergebildes zu verzichten. Vielmehr kann das in der Faser enthaltene Wasser für die Reaktion mit den Harzkomponenten genutzt werdenBecause the components are applied separately, preferably by means of roller arrangements, to the flat structure, an exact metering of the components is possible; the mixing ratio of the components can be varied even during the actual production process. On the one hand, this variation possibility can be used to optimize the properties of the end product, on the other hand, it enables a further disadvantage of the prior art to be countered. In the past, in order to avoid an undefined reaction of the reaction components with ingredients of the fiber structure to be coated, it was necessary to condition it before coating or impregnation. The conditioning essentially consists of predrying. However, subsequent moisture absorption, which, depending on the type of fiber, fiber composition and environmental conditions, is between 4 and 15 percent by weight and takes place very quickly in the case of porous fiber structures, can only be avoided with great technical effort. This renewed moisture absorption, which reaches a considerable level within a few minutes due to suction and capillary effects, will then have an unpredictable effect on the subsequent processing. Due to the possibility of metering the individual components during the application process, which results from the present invention, it is now possible to dispense with conditioning of the fiber structure. Rather, the water contained in the fiber can be used for the reaction with the resin components

Man ist in der Lage, die Feuchtigkeit der einlaufenden Fasergebilde kontinuierlich zu messen und davon abhängig die Dosierung der Komponenten zu variieren. Das Isocyanat des Polyurethansystems reagiert in einer Nebenreaktion mit der Feuchtigkeit unter Bildung von Kohlendioxid, wodurch ein vorteilhaftes Aufschäumen des Harzes während der Reaktion bewirkt wird. Ein solches, an sich bekanntes Aufschäumverfahren von Polyurethanen kann nun im Zusammenhang mit dem erfindungsgemäßen Verfahren genutzt werden, wodurch insbesondere entbehrlich wird, das Fasergebilde in trockenem Zustand dem Verfahren zuzuführen.One is able to continuously measure the moisture of the incoming fiber structures and to vary the dosage of the components depending on this. The isocyanate of the polyurethane system reacts in a side reaction with the moisture to form carbon dioxide, which causes an advantageous foaming of the resin during the reaction. Such a known foaming process for polyurethanes can now be used in connection with the process according to the invention, which in particular It becomes unnecessary to supply the fiber structure to the process in a dry state.

Bei einer weiteren vorteilhaften Ausgestaltung der vorliegenden Erfindung werden Pflanzenöle bzw. daraus hergestellte Produkte als eine der reaktiven Harzkomponenten verwendet. Ein solcher Ersatz für petrochemische Produkte kann den Anteil an nachwachsenden Rohstoffen im Formteil auf bis zu 80 % steigern.In a further advantageous embodiment of the present invention, vegetable oils or products made therefrom are used as one of the reactive resin components. Such a replacement for petrochemical products can increase the proportion of renewable raw materials in the molded part up to 80%.

Das erfindungsgemäße Verfahren wird nun beispielhaft anhand der beiliegenden Zeichnung erläutert. Dabei zeigt:The method according to the invention will now be explained by way of example with reference to the accompanying drawing. It shows:

Figur 1 eine schematische Darstellung eines Verfahrens gemäß der vorliegenden Erfindung.Figure 1 is a schematic representation of a method according to the present invention.

In Figur 1 ist das erfindungsgemäße Verfahren schematisch dargestellt. Die Fasermatten 2 werden als Rollenware dem Verfahren auf Rollen 4 zugeführt. Die abgewickelte Fasermatte wird zunächst in einer ersten Walzenanordnung 6 mit einer ersten reaktiven Komponente beschichtet bzw. getränkt und nach dem Durchlaufen eines weiteren Transportweges in einer zweiten Walzenanordnung 8 mit einer zweiten Komponente versehen. Die Walzenanordnung 6, 8 sind bevorzugt vom Typ einer Kalanderwalze. Durch den Abstand der Walzen und ihrem Durchmesser innerhalb der Walzenanordnungen 6, 8 läßt sich die Menge der Komponenten bestimmen. Nachdem die nun getränkte bzw. beschichtete Fasermatte die Walzenanordnung 8 durchlaufen hat, wird sie nach einem weiteren Transportweg durch eine Schneideanordnung 10, z.B. einem Wasserstrahl, zugeschnitten. Über die nachfolgenden Transportwege 12, 14, 16 werden die Zuschnitte in die Pressen 18, 20, 22 transportiert, in welchen das Pressen und gegebenenfalls eine gleichzeitige Erwärmung erfolgen.The method according to the invention is shown schematically in FIG. The fiber mats 2 are supplied as rolls to the process on rolls 4. The unwound fiber mat is first coated or impregnated with a first reactive component in a first roller arrangement 6 and, after passing through a further transport path, provided with a second component in a second roller arrangement 8. The roller arrangement 6, 8 are preferably of the type of a calender roller. The amount of the components can be determined by the distance between the rollers and their diameter within the roller arrangements 6, 8. After the now impregnated or coated fiber mat has passed through the roller arrangement 8, it is passed through a cutting arrangement 10, e.g. a water jet, cut to size. The blanks are transported via the subsequent transport paths 12, 14, 16 into the presses 18, 20, 22, in which the pressing and possibly simultaneous heating take place.

Die in der Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung wesentlich sein. BEZUGSZEICHENLISTEThe features of the invention disclosed in the description, in the drawing and in the claims can be essential for realizing the invention both individually and in any combination. LIST OF REFERENCE NUMBERS

Flächiges FasergebildeFlat fiber structure

Rolle , 8 Walzenanordnung 0 Schneidevorrichtung 2, 14, 16 Transportweg für Zuschnitt 8, 20, 22 Presse Roll, 8 roller arrangement 0 Cutting device 2, 14, 16 transport path for blank 8, 20, 22 press

Claims

PATENTANSPRÜCHE PATENT CLAIMS 1. Verfahren zum Tränken und/oder Beschichten flächiger Fasergebilde mit reaktiven Mehrkomponentensystemen, bei welchem Komponenten des Mehrkomponentensystems auf Fasergebilde aufgetragen werden und1. A method for impregnating and / or coating flat fiber structures with reactive multicomponent systems, in which components of the multicomponent system are applied to fiber structures and Fasergebilde gepreßt werden, dadurch gekennzeichnet, daß das Auftragen der Komponenten in räumlich und zeitlich getrennten Verfahrensschritten erfolgt.Fiber structures are pressed, characterized in that the components are applied in spatially and temporally separate process steps. 2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß das Auftragen der Komponenten mittels Walzenanordnungen (6, 8) erfolgt.2. The method according to claim 1, characterized in that the application of the components by means of roller assemblies (6, 8). 3. Verfahren nach einem der Ansprüche 1 der 2, dadurch gekennzeichnet, daß das Fasergebilde (2) im Anschluß an das Auftragen der Komponenten in ein oder mehrere Preßwerkzeuge (18, 20, 22) transportiert wird, in welchem der Preßvorgang stattfindet.3. The method according to any one of claims 1 to 2, characterized in that the fiber structure (2) is transported following the application of the components in one or more pressing tools (18, 20, 22) in which the pressing process takes place. 4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem Auftragen der Komponenten und dem Pressen des Fasergebildes (2) ein Zuschnitt des Fasergebildes, zum Beispiel mittels eines Wasserstrahls (10) erfolgt.4. The method according to any one of the preceding claims, characterized in that between the application of the components and the pressing of the fiber structure (2) a cutting of the fiber structure, for example by means of a water jet (10). 5. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß es sich bei den Walzenanordnungen um Kalanderwalzen (6, 8) handelt.5. The method according to any one of the preceding claims, characterized in that the roller assemblies are calender rollers (6, 8). 6. Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß beim Auftragen der Komponenten eine Dosierung mittels des Walzenabstandes und/oder Walzendurchmessers vorgenommen wird.6. The method according to any one of claims 2 to 5, characterized in that when the components are applied, metering is carried out by means of the roller spacing and / or roller diameter. 7. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die in dem Fasergebilde enthaltende Feuchtigkeit kontinuierlich bestimmt wird und für die Reaktion mit einer der Harzkomponenten genutzt wird, wobei die Dosierung der Komponenten in Abhängigkeit des Feuchtigkeitsgehaltes in den Fasergebilden erfolgt. 7. The method according to any one of the preceding claims, characterized in that the moisture contained in the fiber structure is determined continuously and is used for the reaction with one of the resin components, the dosage of the components depending on the moisture content in the fiber structures. 8. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die vollständige Reaktion der Komponenten des Mehrkomponentensystems durch Druck- und Wärmebeaufschlagung erfolgt.8. The method according to any one of the preceding claims, characterized in that the complete reaction of the components of the multicomponent system is carried out by pressure and heat. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Druck- und Wärmebeaufschlagung in dem/den Preßwerkzeug(en) (18,20,22) erfolgt.9. The method according to claim 8, characterized in that the pressure and heat in the press tool (s) (18, 20, 22). 10. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zumindest die zuerst aufgetragene Komponente des10. The method according to any one of the preceding claims, characterized in that at least the component of the first applied Mehrkomponentensystems nicht mit der Umgebungsluft reagiert.Multi-component system does not react with the ambient air. 11. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zumindest die zuerst aufgetragene Komponente erwärmt wird.11. The method according to any one of the preceding claims, characterized in that at least the component applied first is heated. 12. Verfahren nach Anspruch 11 , dadurch gekennzeichnet, daß eine Erwärmung der zuerst aufgetragenen Komponente vor dem Auftragen erfolgt.12. The method according to claim 11, characterized in that a heating of the component applied first takes place before the application. 13. Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß eine Erwärmung der zuerst aufgetragenen Komponente durch eine Beheizung der Walzenanordnung (6) erfolgt.13. The method according to claim 11 or 12, characterized in that the first applied component is heated by heating the roller arrangement (6). 14. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekenn- zeichnet, daß es sich bei den Fasergebilden (2) um verdichtbare, poröse14. The method according to any one of the preceding claims, characterized in that the fiber structures (2) are compressible, porous Gebilde handelt.Entity acts. 15. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Fasergebilde (2) Fasern aus Jute, Flachs, Sisal, Hanf, Kenaf, Rami, Nessel, Kokos, Schilf, Holz, Holzschliff und/oder Baumwolle enthalten.15. The method according to any one of the preceding claims, characterized in that the fiber structures (2) contain fibers made of jute, flax, sisal, hemp, kenaf, rami, nettle, coconut, reed, wood, wood pulp and / or cotton. 16. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Fasergebilde (2) ein Flächengewicht zwischen 500 und 2000 g/m2 aufweisen. 16. The method according to any one of the preceding claims, characterized in that the fiber structures (2) have a basis weight between 500 and 2000 g / m 2 . 17. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Mehrkomponentensystem ein Zweikomponenten- Polyurethansystem ist.17. The method according to any one of the preceding claims, characterized in that the multicomponent system is a two-component polyurethane system. 18. Verfahren nach Anspruch 17, dadurch gekennzeichnet, daß das stöchiometrische Mischungsverhältnis der zuerst aufgetragenen Komponente zu der zweiten Komponente zwischen 100 : 120 und 100 : 200 liegt.18. The method according to claim 17, characterized in that the stoichiometric mixing ratio of the component applied first to the second component is between 100: 120 and 100: 200. 19. Verfahren nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß das Mehrkomponentensystem eine oder mehrere Komponenten aus reinem oder chemisch modifizierten Pflanzenölen wie Rapsöl, Sojaöl, Rizinusöl, Sonnenblumenöl und/oder Leinöl aufweist.19. The method according to any one of claims 1 to 16, characterized in that the multi-component system has one or more components of pure or chemically modified vegetable oils such as rapeseed oil, soybean oil, castor oil, sunflower oil and / or linseed oil. 20. Verfahren nach Anspruch 19, dadurch gekennzeichnet, daß das Pflanzenöl einen hohen Anteil an C18-Fettsäuren aufweist.20. The method according to claim 19, characterized in that the vegetable oil has a high proportion of C 18 fatty acids. 21. Verfahren nach einem der Ansprüche 19 oder 20, dadurch gekennzeichnet, daß die Benetzungseigenschaften der Komponenten des Mehrkompo- nentensystems durch die geeignete Auswahl der Pflanzenölkomponente auf die Eigenschaften der Naturfasern hin abgestimmt werden können.21. The method according to any one of claims 19 or 20, characterized in that the wetting properties of the components of the multicomponent system can be matched to the properties of the natural fibers by suitable selection of the vegetable oil component. 22. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Viskositätsbereich der Komponenten des Mehrkomponentensystems zwischen 200 und 5000 mPa sec liegt.22. The method according to any one of the preceding claims, characterized in that the viscosity range of the components of the multi-component system is between 200 and 5000 mPa sec. 23. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß durch die kontrollierte Dosierung der Komponenten des Mehrkomponentensystems die physikalischen und/oder chemischen Eigenschaften des Endprodukts bestimmt werden. 23. The method according to any one of the preceding claims, characterized in that the physical and / or chemical properties of the end product are determined by the controlled metering of the components of the multicomponent system.
PCT/EP1998/001732 1997-03-25 1998-03-24 Method for impregnating flat fibrous structures with reactive multi-constituent systems Ceased WO1998042485A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843389A (en) * 1965-05-10 1974-10-22 Kurashiki Rayon Co Process for impregnating webs with polymer solutions
US4451310A (en) * 1981-04-14 1984-05-29 Nobel-Bozel Preparation of lightweight, insulating and semirigid or rigid elements
GB2156729A (en) * 1984-04-07 1985-10-16 Holden William J Moulding reinforced materials
US5387301A (en) * 1992-11-30 1995-02-07 Tonen Corporation Method of manufacturing a prepreg

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139226A1 (en) * 1991-08-22 1993-03-11 Pelz Ernst Empe Werke FIBER COMPOSITE MATERIAL ON THE BASIS OF NATURAL FIBER PLANTS AND A METHOD FOR THE CONTINUOUS PRODUCTION AND FURTHER PROCESSING OF COMPRESSED PARTS
DE4420088C3 (en) * 1994-06-09 2001-02-15 Stockhausen Chem Fab Gmbh Process for producing a water-absorbing fabric and its use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843389A (en) * 1965-05-10 1974-10-22 Kurashiki Rayon Co Process for impregnating webs with polymer solutions
US4451310A (en) * 1981-04-14 1984-05-29 Nobel-Bozel Preparation of lightweight, insulating and semirigid or rigid elements
GB2156729A (en) * 1984-04-07 1985-10-16 Holden William J Moulding reinforced materials
US5387301A (en) * 1992-11-30 1995-02-07 Tonen Corporation Method of manufacturing a prepreg

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