EP0085159A1 - Method of manufacturing compression moulded articles - Google Patents
Method of manufacturing compression moulded articles Download PDFInfo
- Publication number
- EP0085159A1 EP0085159A1 EP82111456A EP82111456A EP0085159A1 EP 0085159 A1 EP0085159 A1 EP 0085159A1 EP 82111456 A EP82111456 A EP 82111456A EP 82111456 A EP82111456 A EP 82111456A EP 0085159 A1 EP0085159 A1 EP 0085159A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chips
- wetted
- chip
- hardening
- reaction
- 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.)
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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
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
Definitions
- the invention relates to a process for the production of compacts such as chipboard or fiberboard from mixtures of chips or fibers from wood, woody parts of plants or vegetable or mineral fibers and organic binders and reaction accelerators hardening by polycondensation or polyaddition with or without the addition of heat.
- thermosetting binders for example urea, melamine or phenol-formaldehyde resins
- hardener accelerators are added regularly to the binder solution, which alone or together with the heat supplied accelerate the binder hardening and thus the production process.
- the invention is based on the object of overcoming these limitations and achieving a further reduction in the hardening times with, in case of doubt, rather less heat, ie energy, for the hardening process.
- the chipboard or fiberboard in which the individual chips or fibers are connected to one another by liquid or melting, in any case, however, irreversibly hardening binders under pressure, optionally with additional supply of heat.
- the purpose of the invention is to accelerate the curing or joining process to increase the production quantity per unit of time.
- the chip or fiber cakes consist of two different chip or fiber components A and B, one of which, A, by dividing the originally intended chip or fiber mass in an appropriately selected relation to one another with the binder, the other, B, but with a hardener of high chemical reactivity is superficially wetted.
- the number of contact points or areas between A and B chips increases rapidly up to the extent determined by the degree of compaction, and the binder hardening proceeds quickly and according to the chosen reactivity of the hardener the cross section uniform.
- the method according to the invention is particularly effective when the uncompressed chips or fibers are heated to a temperature which is favorable for binder hardening by known methods before or during the build-up of the chip cake, since, contrary to their effect, this heat, as mentioned, does not result in the binder being pre-hardened leads, with the exception of the few harmless contact points. Rather, their effect occurs during the compression of the A and B chips matrix according to the mechanism described above only at the most convenient time for the task.
- deIn it is possible to deviate the procedure in a targeted manner deIn to come to special mechanisms of action. It may be expedient to assign the binder as part of component A to a specific shape or classification of the chips, but the hardener as an effective part of component B of the chip cake to a different shape or classification, for example particularly fine-fiber or long chips. It may also be appropriate to sprinkle a fiber serving only as a carrier of the hardening substance - or another suitable form of material, for example fine leaflets - in the chip cake, or to use reinforcing agents to be incorporated, for example glass fibers.
- binder and hardener are only brought together in a resin-chip or resin-fiber matrix at the last possible moment in order to be able to work with binder-hardener mixtures with the shortest possible reaction time.
- the advantages of the process are obvious.
- the quick hardening reaction begins, with the exception of the few harmless contact points in the poured chip cake, at the most convenient time of the process, with the chip cake becoming denser. Since the chips of components A and B and thus the binder and hardener do not touch, the influence of time and temperature on the undensified chip cake is not critical, nor is the reactivity of the selected hardener.
- the heat can be supplied to the chip cake before or during assembly, it is immediately present when the hardening process starts and works without the delay caused by the supply. It is sufficient to keep the press plates or press plates forming the chip cake at a temperature which prevents the heat from flowing out of the cake. The undesirable effects of hot pressing surfaces on the compact surface and on the vapor pressure inside do not occur.
- the invention is illustrated by the following example: 100 kg of wood chips from wood with a residual moisture of 4% are mixed with 16 kg of 50% aqueous solution of a urea resin in a spray mixer and, with gentle drying to 5 - 7% residual moisture, fed to a spreading machine, which uses the glue-coated or binder-containing chips as Part (A), as is known, is sprinkled into a single or multi-layer chip cake with 20 kg of fine fiber chips with 5 - 7% residual moisture, which is sprayed separately and in parallel with the processing of the raw wood chips with 0.8 kg of 20% aqueous solution of ammonium chloride as hardener and passed as component (B) to a second spreader, which it continuously sprinkles into the chip flow of the first spreader that supplies component (A) and in the ratio of the above-mentioned component weights. It is important that the chips of components (A) and (B) mix in free fall in this ratio and build up into a loose chip cake, which is then compressed under pressure and subjected to the complete reaction
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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)
- Laminated Bodies (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Herstellung von Presslingen wie Spanplatten, aus Gemischen von Spänen mit Bindemitteln und Reaktionsbeschleunigern und ist dadurch gekennzeichnet, dass man einen Teil A Rohspäne mit Bindemitteln und einen Teil B mit Reaktionsbeschleunigern benetzt und einen locker gestreuten Spänekuchen aus den beiden Komponenten schüttet und den die völlige Reaktionshärtung einleitenden Kontakt der Späne miteinander erst bei deren Verdichtung, beispielsweise durch Pressen, vornimmt. Die schnelle Härtungsreaktion beginnt dabei im zielgerecht günstigsten Zeitpunkt des Verfahrens mit der Verdichtung des Spänekuchens.The invention relates to a process for the production of compacts such as chipboard, from mixtures of chips with binders and reaction accelerators, and is characterized in that part A of raw chips is wetted with binders and part B is wetted with reaction accelerators and a loosely scattered chip cake is poured from the two components and the contact of the chips initiating the complete reaction hardening only occurs when they are compressed, for example by pressing. The quick hardening reaction begins at the most convenient time of the process with the compaction of the chip cake.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Presslingen wie Span- oder Faserplatten aus Gemischen von Spänen oder Fasern aus Holz, verholzten Pflanzenteilen oder pflanzlichen oder mineralischen Fasern und durch Polykondensation oder Polyaddition härtenden organischen Bindemitteln und Reaktionsbeschleunigern mit oder ohne' Zufuhr von Wärme.The invention relates to a process for the production of compacts such as chipboard or fiberboard from mixtures of chips or fibers from wood, woody parts of plants or vegetable or mineral fibers and organic binders and reaction accelerators hardening by polycondensation or polyaddition with or without the addition of heat.
Es ist allgemein bekannt, den Abbindevorgang zum Beispiel bei der Spanplattenherstellung durch die Verwendung wärmehärtbarer Bindemittel zum Beispiel Harnstoff-, Melamin- oder Phenol-Formaldehyd-Harze und durch Zufuhr von Wärme während des Pressvorgangs zu beschleunigen. Ausserdem werden der Bindemittellösung regelmässig Härtebeschleuniger zugefügt, die für sich allein oder zusammen mit der zugeführten Wärme die Bindemittelhärtung und damit den Produktionsvorgang beschleunigen.It is generally known to accelerate the setting process, for example in chipboard production, by using thermosetting binders, for example urea, melamine or phenol-formaldehyde resins, and by applying heat during the pressing process. In addition, hardener accelerators are added regularly to the binder solution, which alone or together with the heat supplied accelerate the binder hardening and thus the production process.
Da zum Beispiel die Beschleunigung der Bindemittelhärtung durch Wärmezufuhr einerseits in der Wärmebeständigkeit des Späne-Bindemittelgemisches, andererseits in der schlechten Wärmeleitfähigkeit der meisten Span- und Faserplattenrohstoffe ihre Grenze findet, ist eine Vielzahl von Vorschlägen bekanntgeworden, entweder die Wärmeleitfähigkeit der Spankuchen oder den Wärmetransport durch zum Beispiel Wasserdampf oder Warmluft zu verbessern, die Wärme gleichzeitig mit dem Aufbau des Spänekuchens in diesen einzubringen oder sie darin zu erzeugen.For example, since the acceleration of the binder hardening through the supply of heat is limited by the heat resistance of the chip-binder mixture on the one hand, and the poor thermal conductivity of most chipboard and fiberboard raw materials on the other hand, a large number of proposals have become known, either the thermal conductivity of the chip cakes or the heat transport through Example to improve water vapor or warm air, to bring the heat into the chip cake at the same time as it is being built up or to generate it.
Alle diese den Stand der Technik bildenden Verfahren finden ihre Grenzen hinsichtlich der weiteren Beschleunigung der Bindemittelhärtung in dem Erfordernis, dass das härtende Bindemittel erst in den Gelzustand, das heisst in die endgültige molekulare Struktur übergehen darf, wenn die Harz-Faser- oder Harz-Späne-Matrix verdichtet ist und damit Späne und Bindemittel ihre endgültige Lage zueinander und innerhalb des Presslings erreicht haben.All of these methods forming the state of the art find theirs Limits with regard to the further acceleration of the binder hardening in the requirement that the hardening binder may only change to the gel state, that is to say the final molecular structure, when the resin-fiber or resin-chip matrix is compacted and thus chips and binder are theirs have reached their final position with respect to each other and within the compact.
Der Erfindung liegt die Aufgabe zugrunde, diese Begrenzungen zu überwinden und eine weitere Verkürzung der Härtezeiten zu erreichen bei im Zweifel eher reduzierter Wärme-, also Energiezufuhr, zum Härteprozess.The invention is based on the object of overcoming these limitations and achieving a further reduction in the hardening times with, in case of doubt, rather less heat, ie energy, for the hardening process.
Die Lösung dieser Aufgabe wird durch die technische Lehre vermittelt, dass ein Teil (A) von 30 - 70 % der Rohspäne oberflächlich mit dem Bindemittel benetzt und der andere Teil (B) von 70 - 30 % der Rohspäne oder eines anderen Trägermaterials, Füllmittels oder dergleichen mit dem Reaktionsbeschleuniger benetzt und beim Aufbau des Spänekuchens durch Streuen oder Schütten locker und wirr durcheinander fallend so geschichtet wird, dass sich die mit Bindemittel benetzten Späne (A) und die mit Reaktionsbeschleuniger benetzten Späne (B) nur soweit durch die Schüttung und das Späneeigengewicht unvermeidlich berühren und der die völlige Reaktionshärtung einleitende Kontakt der Späne miteinander erst bei der Verdichtung, beispielsweise durch Pressen, eintritt.The solution to this problem is conveyed by the technical teaching that a part (A) of 30 - 70% of the raw chips wets the surface with the binder and the other part (B) of 70 - 30% of the raw chips or another carrier material, filler or The same is wetted with the reaction accelerator and when the chip cake is built up by scattering or pouring it is loosely and randomly layered so that the chips (A) wetted with binder and chips (B) wetted with reaction accelerator are only so far separated by the bed and the chip's own weight touch inevitably and the contact of the chips initiating the complete reaction hardening only occurs during the compaction, for example by pressing.
Bei dem erfindungsgemässen Verfahren werden die Span- oder Faserplatten, bei denen die einzelnen Späne oder Fasern durch flüssige oder schmelzende, in jedem Falle jedoch irreversibel aushärtende Bindemittel unter Druck, gegebenenfalls unter zusätzlicher Wärmezufuhr miteinander verbunden werden, hergestellt. Zweck der Erfindung ist die Beschleunigung des Aushärte- bzw. Verbindungsvorganges zur Erhöhung der Produktionsmenge je Zeiteinheit.In the method according to the invention, the chipboard or fiberboard, in which the individual chips or fibers are connected to one another by liquid or melting, in any case, however, irreversibly hardening binders under pressure, optionally with additional supply of heat. The purpose of the invention is to accelerate the curing or joining process to increase the production quantity per unit of time.
Die Späne- oder Faserkuchen bestehen aus zwei verschiedenen Span-oder Faserkomponenten A und B, deren eine, A, durch Aufteilung der ursprünglich vorgesehenen Span- oder Fasermasse in zweckmässig gewählter Relation zueinander mit dem Bindemittel, deren andere, B, jedoch mit einem Härter von hoher chemischer Reaktivität oberflächlich benetzt ist.The chip or fiber cakes consist of two different chip or fiber components A and B, one of which, A, by dividing the originally intended chip or fiber mass in an appropriately selected relation to one another with the binder, the other, B, but with a hardener of high chemical reactivity is superficially wetted.
Wird ein solcher Spänekuchen mit an sich bekannten Streumaschinen so aufgebaut, dass die Späne der Komponenten A und B zufällig und wirr fallend im Kuchen gleichmässig gemischt verteilt sind, dann tritt zwar eine gewisse Härtung des Bindemittels der A-Späne an den Berührungsstellen mit B-Spänen ein, da der Spankuchen jedoch sehr sperrig-locker geschichtet ist, ist die Anzahl dieser an sich unerwünschten Härtungsbrücken gering und bleibt unschädlich. ,If such a chip cake is set up with spreading machines known per se, so that the chips of components A and B are randomly distributed in the cake, evenly mixed, then a certain hardening of the binder of the A chips occurs at the points of contact with B chips a, since the chip cake is layered very bulky and loose, the number of these undesirable hardening bridges is small and remains harmless. ,
Wird der so aufgebaute Spänekuchen nun wie bekannt verdichtet, so vergrössert sich die Zahl der Berührungspunkte oder -flächen zwischen A- und B-Spänen schnell bis zu dem durch den Verdichtungsgrad bestimmten Umfang, und die Bindemittelhärtung verläuft entsprechend der gewählten Reaktivität des Härters schnell und über den Querschnitt gleichförmig.If the chip cake constructed in this way is now compacted as is known, the number of contact points or areas between A and B chips increases rapidly up to the extent determined by the degree of compaction, and the binder hardening proceeds quickly and according to the chosen reactivity of the hardener the cross section uniform.
Das erfindungsgemässe Verfahren ist besonders wirksam, wenn die unverdichteten Späne oder Fasern vor oder beim Aufbau des Spankuchens auf eine für die Bindemittelhärtung günstige Temperatur nach bekannten Verfahren aufgeheizt werden, da diese Wärme im Gegensatz zu ihrer Wirkung, wie erwähnt, nicht zu einer Vorhärtung des Bindemittels führt, die wenigen unschädlichen Berührungsstellen ausgenommen. Vielmehr tritt ihre Wirkung während der Verdichtung der A- und B-Späne-matrix nach dem oben beschriebenen Mechanismus erst im aufgabengerecht günstigsten Zeitpunkt auf.The method according to the invention is particularly effective when the uncompressed chips or fibers are heated to a temperature which is favorable for binder hardening by known methods before or during the build-up of the chip cake, since, contrary to their effect, this heat, as mentioned, does not result in the binder being pre-hardened leads, with the exception of the few harmless contact points. Rather, their effect occurs during the compression of the A and B chips matrix according to the mechanism described above only at the most convenient time for the task.
Selbstverständlich ist es möglich, das Verfahren zielgerecht abzuwandeIn, um zu besonderen Wirkmechanismen zu kommen. So kann es zweckmässig sein, das Bindemittel als Teil der Komponente A einer bestimmten Form oder Klassierung der Späne zuzuordnen, den Härter als wirkenden Teil der Komponente B des Spänekuchens jedoch einer anderen Form oder Klassierung, zum Beispiel besonders feinfaserigen oder langen Spänen. Es kann ferner angezeigt sein, eine nur als Träger der Härtersubstanz dienende Faser - oder eine andere geeignete Stofform, zum Beispiel feine Blättchen - in den Spänekuchen einzustreuen, oder einzubauende Armierungsmittel, zum Beispiel Glasfasern, dazu zu verwenden. Alle diese Modifikationen des Verfahrens sind durch den grundsätzlichen Erfindungsgedanken gedeckt, Bindemittel und Härter in einer Harz-Späne- oder Harz-Fasermatrix erst im letztmöglichen Augenblick zusammenzubringen, um mit Bindemittel-Härter-Gemischen von kürzester Reaktionszeit arbeiten zu können.Of course, it is possible to deviate the procedure in a targeted manner deIn to come to special mechanisms of action. It may be expedient to assign the binder as part of component A to a specific shape or classification of the chips, but the hardener as an effective part of component B of the chip cake to a different shape or classification, for example particularly fine-fiber or long chips. It may also be appropriate to sprinkle a fiber serving only as a carrier of the hardening substance - or another suitable form of material, for example fine leaflets - in the chip cake, or to use reinforcing agents to be incorporated, for example glass fibers. All of these modifications of the process are covered by the basic idea of the invention, that the binder and hardener are only brought together in a resin-chip or resin-fiber matrix at the last possible moment in order to be able to work with binder-hardener mixtures with the shortest possible reaction time.
Die Vorteile des Verfahrens sind offensichtlich. Die schnelle Härtereaktion beginnt, die wenigen unschädlichen Berührungsstellen im geschütteten Spänekuchen wiederum ausgenommen, im zielgerecht günstigsten Zeitpunkt des Prozesses, mit der Verdichtung des Spänekuchens. Da sich die Späne der Komponenten A und B und damit Bindemittel und Härter nicht berühren, ist der Einfluss von Zeit und Temperatur auf den unverdichteten Spänekuchen wenig kritisch, auch nicht die Reaktivität des gewählten Härters.The advantages of the process are obvious. The quick hardening reaction begins, with the exception of the few harmless contact points in the poured chip cake, at the most convenient time of the process, with the chip cake becoming denser. Since the chips of components A and B and thus the binder and hardener do not touch, the influence of time and temperature on the undensified chip cake is not critical, nor is the reactivity of the selected hardener.
Da ferner die Wärme dem Spankuchen vor oder beim Aufbau zugeführt werden kann, ist sie sofort beim Anspringen des Härtevorgangs zugegen und wirkt ohne die zufuhrbedingte Zeitverzögerung. Es genügt, die den Spänekuchen formenden Pressplatten oder Pressbleche auf einer den Wärmeabfluss aus dem Kuchen verhindernden Temperatur zu halten. Die unerwünschten Wirkungen heisser Pressflächen auf die Presslingsoberfläche und auf den Dampfdruck in seinem Inneren unterbleiben.Furthermore, since the heat can be supplied to the chip cake before or during assembly, it is immediately present when the hardening process starts and works without the delay caused by the supply. It is sufficient to keep the press plates or press plates forming the chip cake at a temperature which prevents the heat from flowing out of the cake. The undesirable effects of hot pressing surfaces on the compact surface and on the vapor pressure inside do not occur.
Die Erfindung wird anhand des nachfolgenden Beispiels erläutert: 100 kg Hackrohspäne aus Holz mit einer Restfeuchtigkeit von 4 % werden mit 16 kg 50 %iger wässeriger Lösung eines Harnstoffharzes im Sprühmischer gemischt und unter schonender Trocknung auf 5 - 7 % Restfeuchte einer Streumaschine zugeführt, die die beleimten bzw. mit dem Bindemittel versehenen Späne als Teil (A) wie bekannt zu einem ein- oder mehrschichtig aufgebauten Spänekuchen zusammenstreut mit 20 kg Feinfaserspänen von 5 - 7 % Restfeuchte, die getrennt und parallel zur Aufbereitung der Hackrohspäne mit 0,8 kg 20 %iger wässeriger Lösung von Ammoniumchlorid als Härter besprüht und als Komponente (B) einem zweiten Streuwerk übergeben, das sie in den Spänestrom des ersten, die Komponente (A) liefernden Streuwerks stetig und im Verhältnis der oben genannten Komponentengewichte einstreut. Dabei ist es wichtig, dass sich die Späne der Komponente (A) und (B) im freien Fall in diesem Verhältnis mischen und zu einem lockeren Spänekuchen aufbauen, der dann unter Pressung verdichtet und dabei der völligen Reaktionshärtung unterworfen wird.The invention is illustrated by the following example: 100 kg of wood chips from wood with a residual moisture of 4% are mixed with 16 kg of 50% aqueous solution of a urea resin in a spray mixer and, with gentle drying to 5 - 7% residual moisture, fed to a spreading machine, which uses the glue-coated or binder-containing chips as Part (A), as is known, is sprinkled into a single or multi-layer chip cake with 20 kg of fine fiber chips with 5 - 7% residual moisture, which is sprayed separately and in parallel with the processing of the raw wood chips with 0.8 kg of 20% aqueous solution of ammonium chloride as hardener and passed as component (B) to a second spreader, which it continuously sprinkles into the chip flow of the first spreader that supplies component (A) and in the ratio of the above-mentioned component weights. It is important that the chips of components (A) and (B) mix in free fall in this ratio and build up into a loose chip cake, which is then compressed under pressure and subjected to the complete reaction hardening.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823200914 DE3200914A1 (en) | 1982-01-14 | 1982-01-14 | METHOD FOR PRODUCING PRESSES |
| DE3200914 | 1982-01-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0085159A1 true EP0085159A1 (en) | 1983-08-10 |
Family
ID=6153040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82111456A Withdrawn EP0085159A1 (en) | 1982-01-14 | 1982-12-10 | Method of manufacturing compression moulded articles |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4526737A (en) |
| EP (1) | EP0085159A1 (en) |
| JP (1) | JPS58136430A (en) |
| DE (1) | DE3200914A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6815175B2 (en) | 2001-03-16 | 2004-11-09 | Cornell Research Foundation, Inc. | Anti-amyloid peptide antibody based diagnosis and treatment of a neurological disease or disorder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6908295B2 (en) * | 2000-06-16 | 2005-06-21 | Avery Dennison Corporation | Process and apparatus for embossing precise microstructures and embossing tool for making same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE902550C (en) * | 1951-12-05 | 1954-01-25 | Max Himmelheber Dipl Ing | Process for the production of wood chipboard |
| CH448504A (en) * | 1965-07-17 | 1967-12-15 | Schenck Gmbh Carl | Method and system for the production of pressed bodies, in particular plates from grit |
| AT334068B (en) * | 1972-02-14 | 1976-12-27 | Oesterr Hiag Werke Ag | METHOD FOR MANUFACTURING LIGHT PANELED PANELS |
| DE2101392B2 (en) * | 1970-01-19 | 1977-01-27 | Dabernig, Josef, Radenthein; Herz, Josef Paul, Ferndorf; (Österreich) | METHOD FOR MANUFACTURING A LIGHTWEIGHT BODY |
| FR2490142A1 (en) * | 1980-09-15 | 1982-03-19 | 23 Szamu Allami Epitoipari Val | PROCESS FOR THE PRODUCTION OF INSULATION BOARDS FROM FIBROUS AGRICULTURAL WASTE AND A BINDER |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2033411A (en) * | 1932-09-06 | 1936-03-10 | Pacific Lumber Co | Manufacture of artificial lumber and pressed and molded products |
| US2543101A (en) * | 1944-07-20 | 1951-02-27 | American Viscose Corp | Composite fibrous products and method of making them |
| US2870110A (en) * | 1956-09-26 | 1959-01-20 | Dow Chemical Co | Porous composition containing a phenolaldehyde resin, method of preparation, and article fabricated therefrom |
| DE1198539B (en) * | 1958-04-23 | 1965-08-12 | Max Himmelheber Dipl Ing | Process for the production of chipboard and chipboard bodies |
| DE1161415B (en) * | 1960-09-30 | 1964-01-16 | Ulrich Gottschalk | Method and device for producing panels from chips and / or fibers provided with a binding agent, in particular from wood |
| US3207819A (en) * | 1961-07-13 | 1965-09-21 | Miller Hofft Inc | Method of making fibreboard |
| DE1234016B (en) * | 1965-08-03 | 1967-02-09 | Cassella Farbwerke Mainkur Ag | Process for the production of weather- and moisture-resistant chipboard |
| US3969454A (en) * | 1971-12-10 | 1976-07-13 | Canadian Patents And Development Limited | Method of making colored particleboard |
| US3950472A (en) * | 1975-02-26 | 1976-04-13 | Continental Can Company, Inc. | Molding wood articles from ammonium salt-wood particle mixtures |
| US4257995A (en) * | 1979-05-03 | 1981-03-24 | The Upjohn Company | Process for preparing particle board and polyisocyanate-phosphorus compound release agent composition therefor |
| US4405542A (en) * | 1982-01-25 | 1983-09-20 | Greer Marian B | Method for the production of a composite material |
-
1982
- 1982-01-14 DE DE19823200914 patent/DE3200914A1/en active Granted
- 1982-12-10 EP EP82111456A patent/EP0085159A1/en not_active Withdrawn
-
1983
- 1983-01-13 JP JP58000034A patent/JPS58136430A/en active Granted
- 1983-01-14 US US06/458,013 patent/US4526737A/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE902550C (en) * | 1951-12-05 | 1954-01-25 | Max Himmelheber Dipl Ing | Process for the production of wood chipboard |
| CH448504A (en) * | 1965-07-17 | 1967-12-15 | Schenck Gmbh Carl | Method and system for the production of pressed bodies, in particular plates from grit |
| DE2101392B2 (en) * | 1970-01-19 | 1977-01-27 | Dabernig, Josef, Radenthein; Herz, Josef Paul, Ferndorf; (Österreich) | METHOD FOR MANUFACTURING A LIGHTWEIGHT BODY |
| AT334068B (en) * | 1972-02-14 | 1976-12-27 | Oesterr Hiag Werke Ag | METHOD FOR MANUFACTURING LIGHT PANELED PANELS |
| FR2490142A1 (en) * | 1980-09-15 | 1982-03-19 | 23 Szamu Allami Epitoipari Val | PROCESS FOR THE PRODUCTION OF INSULATION BOARDS FROM FIBROUS AGRICULTURAL WASTE AND A BINDER |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6815175B2 (en) | 2001-03-16 | 2004-11-09 | Cornell Research Foundation, Inc. | Anti-amyloid peptide antibody based diagnosis and treatment of a neurological disease or disorder |
Also Published As
| Publication number | Publication date |
|---|---|
| US4526737A (en) | 1985-07-02 |
| DE3200914A1 (en) | 1983-07-28 |
| JPH0327364B2 (en) | 1991-04-15 |
| DE3200914C2 (en) | 1988-12-15 |
| JPS58136430A (en) | 1983-08-13 |
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