DE2925630A1 - Cellulose moulding process - with duroplastic resin applied to part of raw material before processing - Google Patents
Cellulose moulding process - with duroplastic resin applied to part of raw material before processingInfo
- Publication number
- DE2925630A1 DE2925630A1 DE19792925630 DE2925630A DE2925630A1 DE 2925630 A1 DE2925630 A1 DE 2925630A1 DE 19792925630 DE19792925630 DE 19792925630 DE 2925630 A DE2925630 A DE 2925630A DE 2925630 A1 DE2925630 A1 DE 2925630A1
- Authority
- DE
- Germany
- Prior art keywords
- fiber materials
- cellulose
- thermosetting
- cell fiber
- waste
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229920002678 cellulose Polymers 0.000 title claims abstract description 10
- 239000001913 cellulose Substances 0.000 title claims abstract description 10
- 238000000465 moulding Methods 0.000 title description 2
- 239000002994 raw material Substances 0.000 title description 2
- 239000011347 resin Substances 0.000 title 1
- 229920005989 resin Polymers 0.000 title 1
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 239000010893 paper waste Substances 0.000 claims abstract description 5
- 239000005011 phenolic resin Substances 0.000 claims abstract description 5
- 239000002657 fibrous material Substances 0.000 claims description 26
- 239000011230 binding agent Substances 0.000 claims description 25
- 229920001187 thermosetting polymer Polymers 0.000 claims description 19
- 230000001413 cellular effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 3
- 239000007767 bonding agent Substances 0.000 abstract 4
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 241000273930 Brevoortia tyrannus Species 0.000 description 13
- 210000004027 cell Anatomy 0.000 description 12
- 239000000654 additive Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 210000003719 b-lymphocyte Anatomy 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
- D21H23/06—Controlling the addition
- D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
- D21H23/16—Addition before or during pulp beating or refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
- D21H5/2607—Pretreatment and individualisation of the fibres, formation of the mixture fibres-gas and laying the fibres on a forming surface
- D21H5/2628—Formation of a product from several constituents, e.g. blends of various types of fibres, fillers and/or binders or formation from various sources and/or streams or fibres
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
Verfahren zur Herstellung von zu Formteilen Process for the production of molded parts
verpreßbarem Zellfasermaterial (Zusatz zu P 28 45 112.9-16) Die Erfindung betrifft ein Verfahren zur Herstellung von zu Formteilen verpreßbarem Zel Ifasermaterial, wobei zel lstoffhaltiges Material zu Faserstoff zerfasert, aus einer Mischung des Faserstoffs mit mindestens einem thermoplastischen und mindestens einem duroplastischen Bindemittel ein Vlies gebildet und das Vlies unter Wärmeeinwirkung zu einer transportfähigen, verpreßbaren Matte verdichtet wird, wobei ferner gemäß Patentanmeldung P 28 45 112.9-16 als zellstoffhaltiges Material Abfälle von Zel lfaserwerkstoffen verwendet werden, die Zellfaserwerkstoffe geschnitzelt und trocken zu Faserstoff vermahlen und die thermoplastischen Bindemittel in Form von trockenem Pulver zugegeben werden. compressible cell fiber material (addition to P 28 45 112.9-16) The invention relates to a process for the production of cellular fiber material that can be pressed into molded parts, wherein cellular material-containing material is defibrated to pulp, from a mixture of Fibrous material with at least one thermoplastic and at least one thermoset Binder formed a fleece and the fleece under the action of heat to a transportable, compressible mat is compacted, further according to patent application P 28 45 112.9-16 cellulose fiber waste is used as the cellulose-containing material, the cell fiber materials chipped and dry milled to pulp and the thermoplastic binders can be added in the form of dry powder.
Die obengenannte Patentanmeldung, zu der die vorliegende Patentanmeldung eine Zusatzanmeldung darstellt, geht von einem Stand der Technik aus, in dem durch Zerfaserung im Defibrator von aus Rundholz gewonnenen Hackschnitzeln hergestellte Holzfasern mit thermoplastischen Naturharzderivaten beleimt, mit duroplastischen Bindemitteln, üblicherweise Phenolharzen, gemischt und in einem sogenannten Felter zu einem Vlies gestreut werden. Zur Lösung der Aufgabe, ein solcher Verfahren anzugeben, das in einfacher und kostengünstiger Weise die Herstellung von Zellfasermaterial gestattet, das sich durch gute Homogenität und gute mechanische Eigenschaften auszeichnet und in einfacher Weise zu Formteilen hoher Qualität fertigpressen läßt, lehrt die Hauptanmeldung im wesentlichen, daß als zellstoffhaltiges Material Abfälle von Ze I Zellfaserwerkstoffen verwendet und geschnitzelt und trocken zu Faserstoff vermahlen werden und daß sowohl die thermoplastischen als auch die duroplastischen Bindemittel in Form von trockenem Pulver zugegeben werden. D ieses Verfahren gemäß der Hauptanmeldung führt zu hervorragenden Ergebnissen: Es läßt sich danach in einfacher und kostengünstiger Weise, insbesondere ohne umfang -reichen Wasserhaushalt, ein Zellfasermaterial herstellen, das sich durch hohe Flexibilität auszeichnet und in einem Preßgang zu Formteilen gepreßt werden kann, die sich durch gute Homogenität, hohe Festigkeit und geringe Dichte auszeichnen. The above-mentioned patent application to which the present patent application represents an additional application, is based on a state of the art in which Defibrillation in the defibrator of wood chips obtained from round wood Wood fibers glued with thermoplastic natural resin derivatives, with thermosetting Binders, usually phenolic resins, mixed and in a so-called Felter be scattered to a fleece. To solve the problem of specifying such a method, that in a simple and inexpensive way the production of cellular fiber material permitted, which is characterized by good homogeneity and good mechanical properties and can be finished pressing in a simple manner into molded parts of high quality, teaches Main application essentially that the cellulose-containing material waste from Ze I cell fiber materials are used and chipped and dry milled to pulp and that both the thermoplastic and the thermosetting binders be added in the form of dry powder. This procedure according to the main application leads to excellent results: it can be afterwards in easier and cheaper Wise, especially without extensive water balance, produce a cell fiber material, which is characterized by high flexibility and in one pressing process to form molded parts can be pressed, which is characterized by good homogeneity, high strength and low Distinguish density.
Nach dem Verfahren gemäß Hauptanmeldung wird das zel lstoffhaltige Ausgangsmaterial vorzerkleinert, mit den jeweils gesondert zugegebenen Bindemitteln und gegebenenfalls Zusatzstoffen versetzt und durch trockenes Mahlen zerfasert und gleichzeitig gemischt. Dabei hat sich in der Praxis gezeigt, daß hinsichtlich der Dosierung und Prozeßsteuerung noch Verbesserungen möglich sind. Insbesondere erweist die Dosierung der duroplastischen Bindemittel nach Maßgabe unterschiedlicher zell stoffhal tiger Ausgangsmaterialien und unterschiedlicher Anforderungen hinsichtlich Dichte und Festigkeit des erzeugten Zellfasermaterials sich als schwierig. According to the procedure according to the main application, the cellulose-containing Raw material pre-shredded, with the binders added separately in each case and optionally additives are added and fiberized by dry grinding and mixed at the same time. This has proven itself in practice shown that improvements are still possible with regard to dosing and process control. In particular, the dosage of the thermosetting binder proves to be appropriate different cellular starting materials and different ones Requirements regarding density and strength of the cell fiber material produced to be difficult.
Der Erfindung liegt daher die Aufgabe zugrunde, das Verfahren gemäß Hauptanmeldung so weiterzubilden, daß in einfacher Weise eine genaue Dosierung der duroplastischen Bindemittel in Anpassung an unterschiedliche Verfahrensbedingungen möglich ist.The invention is therefore based on the object of the method according to To develop the main application so that in a simple manner an exact dosage of thermosetting binder in adaptation to different process conditions is possible.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß mindestens ein Teil der Zellfaserwerkstoffe vor dem Zerkleinern mit mndestens einem Teil des duroplastischen Bindemittels (bzw. der duroplastischen Bindemittel) behandelt wird. Die Steuerung der Zugabe der duroplastischen Bindemittel erfolgt damit mindestens zum Teil durch Dosierung der damit behandelten Zel Ifaserwerkstoffe, die das Ausgangsmaterial darstellen. Es hat sich gezeigt, daß auf diesem Wege eine wesentlich einfachere und genauere Verfahrenssteuerung erreicht werden kann. This object is achieved according to the invention in that at least part of the cell fiber materials with at least part of the thermosetting binder (or the thermosetting binder) is treated. The control of the addition of the thermosetting binders takes place with it at least partly by dosing the Zel Ifaserwerkstoffe treated with it, which are the starting material represent. It has been shown that in this way a much simpler one and more precise process control can be achieved.
Vorzugsweise werden als Zel lfaserwerkstoffe Papierabfäi le verwendet, die mit den duroplastischen Bindemitteln getränkt sind. Bei einer besonders zu bevorzugenden Ausführungsform werden als Zel lfaserwerkstoffe Abfälle von Phenolharz getränkten Filterpapieren verwendet, die bei der Herstellung von Industriefiltem anfallen. Diese Ausführungsform des erfindungsgemäßen Verfahrens zeichnet sich dadurch aus, daß nicht nur die erläuterten verfahrenstechnischen Verbesserungen erreicht werden,sondern daß außerdem erhebliche Kosteneinsparungen erreicht werden. Es kommt hinzu, daß die duroplastischen Bindemittel in den damit getränkten Papierabfälien außerordentlich gleichmäßig und innig verteilt sind, was zu einer erheblichen Fest i gke itsverbesserung, insbesondere hinsichtl ich D ruck- und Biegefestigkeit, der resultierenden Formteile führt. Aufgrund dieser Gesichtspunkte empfiehlt es sich in der Regel, die gesamte Menge der duroplastischen Bindemittel in Form von damit behandelten Zellfaserwerkstoffen zuzugeben. Paper waste is preferably used as cell fiber materials, which are impregnated with the thermoset binders. With a particularly preferable one Embodiment are as cell fiber materials soaked waste of phenolic resin Used filter papers that are produced in the manufacture of industrial filters. This embodiment of the method according to the invention is characterized in that that not only the procedural improvements explained are achieved, but that also significant cost savings can be achieved. It is coming added that the thermosetting binder in the paper waste impregnated with it extraordinarily evenly and intimately distributed, resulting in a substantial feast i gke itsimprovement, especially with regard to compressive strength and flexural strength, the resulting moldings leads. Based on these considerations, it is recommended usually, the entire amount of thermosetting binder in the form of it treated cellular fiber materials to be added.
Nachfolgend wird die Erfindung anhand der einzigen Figur näher erläutert, die lediglich als Ausführungsbeispiel eine Anlage zur Durchführung des beschriebenen Verfahrens darstellt. The invention is explained in more detail below with reference to the single figure, which is merely an exemplary embodiment of a system for carrying out the described Represents procedure.
Die Ausgangsstoffe des Verfahrens werden in Bunkern 1 bis 4 bereit gehalten. Der Bunker 1a enthält zellstoffhaltiges Material in Form von Abfällen von Papier, Pappe usw., die nicht behandelt sind und folglich Bindemittel allenfalls in untergeordnetem Anteil enthalten. Der Bunker 1b enthält mit duroplastischem B indem i ttel behandelte Zel faserwerkstoffen, nämlich Abfälle von mit noch aushärtbaren Phenolharzen getränkten Filterpapieren, wie sie bei der Herstellung von Industriefiltem anfallen. Ferner enthalten die Bunker 2 ein thermoplastisches Bindemittel in Form eines trockenen Pulvers von faserartiger Teilchenbeschaffenheit aus Polyäthylen, der Bunker 3 weitere duroplastische Bindemittel, die gegebenenfalls zusätzlich zum Bindemittelanteil der Zellfaserwerkstoffe des Bunkers 1b zugegeben werden können, und der Bunker 4 Zusatzstoffe, beispielsweise ein organisches Flammschutzmittel. Die Zellfaserwerkstoffe aus dem Bunker 1a werden einer Schneidmühle 5a, die Filterpapierabfälle aus dem Bunker Ib einer Schneidmühle 5b zugeführt, wo sie jeweils entsprechend in Partikel mit Abmessungen von ca. 5 x Smm zerkleinert werden. An sich könnten die.Ausgangsstoffe aus den Bunkern la und Ib auch gemeinsam zerkleinert werden, jedoch lassen die getrennt vorzerkleinerten Komponenten sich genauer dosieren. Aus den Schneidmühlen 5a, b gelangen die zerkleinerten Zellfaserwerkstoffe in eine Wirbelstrecke 6, in der sie mit den aus den Bunkern 2, 3, 4 zugeführten B indemitteln und Zusatzstoffen gemischt werden. D ie Förderung aller dieser Komponenten erfolgt pneumatisch. The starting materials for the process are prepared in bunkers 1 to 4 held. The bunker 1a contains pulp-containing material in the form of waste of paper, cardboard etc. that have not been treated and consequently binders at most contained in a minor proportion. The bunker 1b contains with thermoset B cell fiber materials treated by i ttel, namely waste from with curable Phenolic resin impregnated filter papers, such as those used in the manufacture of industrial filters attack. Furthermore, the bunkers 2 contain a thermoplastic binder in the form a dry powder of fibrous particles made of polyethylene, the bunker 3 more thermosetting binders, which may be in addition to Binder content of the cell fiber materials of the bunker 1b can be added, and the bunker 4 additives, such as an organic flame retardant. The cell fiber materials from the bunker 1a are fed to a cutting mill 5a, the filter paper waste fed from the bunker Ib a cutting mill 5b, where they each correspondingly in Particles with dimensions of approx. 5 x Smm are crushed. As such, the starting materials could from the bunkers la and Ib are also crushed together, but leave them separated pre-shredded components can be dosed more precisely. From the cutting mills 5a, b get the shredded cell fiber materials into a vortex section 6, in which they mixed with the substances and additives supplied from the bunkers 2, 3, 4 will. All these components are conveyed pneumatically.
Zur Überwachung des Mischungsverhältnisses sind den Bunkern (nicht dargestellte) Dosierwaagen nachgeschaltet. Auf die Wirbelstrecke 6 folgt eine Reibbackenmühle 7, in der die Zellfaserwerkstoffe trocken gemahlen, dabei zerfasert und zu-gleich mit den Bindemitteln und Zusatzstoffen gleichmäßig gemischt werden. Das Mahlgut gelangt aus der Reibbackenmühle in einen mit Luft arbeitenden Sichter 8, aus dem die grobe Fraktion zum Eingang der Reibbackenmühle 7 zurückgeführt wird. An den Sichter 8 schließt sich ein Mischungsbunker 9 an, in dem die Mischung für die weiteren Arbeitsgänge bereitgehalten wird.To monitor the mixing ratio, the bunkers (not shown) dosing scales connected downstream. The vortex section 6 is followed by a friction jaw mill 7, in which the cell fiber materials are dry-ground, thereby frayed and at the same time be mixed evenly with the binders and additives. The grist passes from the friction mill into an air classifier 8, from which the coarse fraction is returned to the entrance of the friction jaw mill 7. To the Sifter 8 is followed by a mixing bunker 9, in which the mixture for the other Operations is kept ready.
Die Mischung wird aus dem Mischungsbunker 9 abgezogen und mittels eines Formkopfes 10 auf einen darunter angeordneten Vliesträger 13 aus einem endlosen, umlaufenden Sieb zu einem Vlies 17 gestreut. Das Vlies 17, das durch den Vliesträger t3 in Richtung des Pfeils 15 gefördert wird, wird zunächst in einer Unterdruckkammer 14 verdichtet und verfilzt und anschließend durch eine umlaufende Fräse 16 auf die vorgesehene Dicke eingestellt. Anschließend durchläuft das Vlies 17 eine Heizeinrichtung 18, in der das Vlies 17 von erwärmter Luft durchströmt wird. Dabei wird das Vlies 17 im kontinuierlichen Durchlauf gleichmäßig über seine ganze Dicke auf die Pl ast if i z i erungstem peratur des thermoplastischen Kunst stoffs erwärmt und dabei zugleich auf die vorgesehene Restfeuchte eingestellt. Unmittelbar auf die Heizeinrichtung 18 folgt eine Preßvorrichtung 22, in der das Vlies 17 mittels einer Druckwalze 23 im gleichfalls kontinuierlichen Durchlauf auf die vorgesehene Dichte verdichtet wird. ie Druckwalze 23 wird durch einen (nicht dargestellten) Antriela drehangetrieben und ist hinsichtlich des Preßdruck bzw. ihres Abstandes vom unteren Pressentisch 24 ein)tcllbar. An die Preßvorrichtung 22 schließt eine Kühleinrichtung 25 an, in der das Vlies 17 gleichfalls von entsprechend temperierter Luft durchströmt und dadurch auf Raumtemperatur gekühlt wird. Anschließend wird das Vlies 17 in einer Trennvorrichtung 26 in Abschnitte vorbestimmter Länge aufgetrennt. Weitere Einzelheiten des vorstehend kurz angedeuteten Verfahrensablauf finden sich in der Hauptanmeldung und brauchen daher hier nicht im einzelnen beschrieben zu werden. The mixture is withdrawn from the mixing hopper 9 and by means of a forming head 10 on a non-woven carrier 13 arranged below it made of an endless, surrounding sieve scattered to form a fleece 17. The fleece 17, which is through the fleece carrier t3 is promoted in the direction of arrow 15, is first in a vacuum chamber 14 compacted and matted and then by a rotating cutter 16 on the intended thickness adjusted. The fleece 17 then passes through a heating device 18, in which the fleece 17 is flowed through by heated air. The fleece is thereby 17 in a continuous cycle evenly over its entire thickness on the pl ast if i z i ing temperature of the thermoplastic material is heated and included at the same time adjusted to the intended residual moisture. Immediately on the heating device 18 is followed by a pressing device 22 in which the fleece 17 is placed by means of a pressure roller 23 compressed to the intended density in the likewise continuous passage will. The pressure roller 23 is driven in rotation by a drive mechanism (not shown) and is with regard to the pressing pressure or its distance from the lower press table 24 a) tcllable. The pressing device 22 is followed by a cooling device 25, in which also flows through the fleece 17 with appropriately tempered air and is thereby cooled to room temperature. Then the fleece 17 is in a Separating device 26 separated into sections of a predetermined length. more details of the procedure briefly indicated above can be found in the main application and therefore do not need to be described in detail here.
Als Ergebnis des vorstehend beschriebenen Verfahrens ergibt sich ein Zellfasermaterial, in dem die duroplastischen Bindemittel in noch aushärtbarer Form vorliegen und beim Verpressen zu Formteilen ausgehärtet werden. As a result of the above-described method, there is a cellular fiber material in which the thermosetting binder is still curable Form and are cured when pressed to form molded parts.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792925630 DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792925630 DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2925630A1 true DE2925630A1 (en) | 1981-01-15 |
| DE2925630B2 DE2925630B2 (en) | 1981-10-01 |
| DE2925630C3 DE2925630C3 (en) | 1982-05-13 |
Family
ID=6074122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792925630 Expired DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2925630C3 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0262898A1 (en) * | 1986-09-26 | 1988-04-06 | Howard City Paper Company | Apparatus and process for making pressboard from poly-coated paper |
| DE3641466A1 (en) * | 1986-12-04 | 1988-06-16 | Uwe Welteke | Process and device for producing fibre boards |
| DE3641464A1 (en) * | 1986-12-04 | 1988-06-16 | Uwe Welteke | HEAT-INSULATING PANEL CONTAINING NATURAL FIBERS AND METHOD AND DEVICE FOR THEIR PRODUCTION |
| US5137668A (en) * | 1989-07-21 | 1992-08-11 | Fortifiber Corporation | Method for making pressboard from poly-coated paper using relative movement of facing webs |
| DE10066343B4 (en) * | 2000-06-02 | 2013-01-03 | Steico Se | Process for producing a flexible wood-fiber insulating mat and insulating mat produced by this process |
| CN110241660A (en) * | 2019-05-17 | 2019-09-17 | 合肥宜果科技服务有限公司 | A kind of processing method of waste and old wrapping paper recycling and reusing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412660C2 (en) * | 1984-04-02 | 1987-01-02 | Günter H. 1000 Berlin Kiss | Process for producing molded parts from fibrous material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2845112A1 (en) * | 1978-10-17 | 1980-04-24 | Kast Casimir Gmbh & Co Kg | METHOD AND SYSTEM FOR THE PRODUCTION OF COMPRESSIBLE CELL FIBER MATERIAL |
-
1979
- 1979-06-26 DE DE19792925630 patent/DE2925630C3/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2845112A1 (en) * | 1978-10-17 | 1980-04-24 | Kast Casimir Gmbh & Co Kg | METHOD AND SYSTEM FOR THE PRODUCTION OF COMPRESSIBLE CELL FIBER MATERIAL |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0262898A1 (en) * | 1986-09-26 | 1988-04-06 | Howard City Paper Company | Apparatus and process for making pressboard from poly-coated paper |
| JPS63139703A (en) * | 1986-09-26 | 1988-06-11 | ハワード シテイ ペイパー カンパニ | Method and apparatus for producing pressboard from paper coated with thermoplastic material |
| US4810445A (en) * | 1986-09-26 | 1989-03-07 | Fortifiber Corporation | Process for making pressboard from poly-coated paper |
| DE3641466A1 (en) * | 1986-12-04 | 1988-06-16 | Uwe Welteke | Process and device for producing fibre boards |
| DE3641464A1 (en) * | 1986-12-04 | 1988-06-16 | Uwe Welteke | HEAT-INSULATING PANEL CONTAINING NATURAL FIBERS AND METHOD AND DEVICE FOR THEIR PRODUCTION |
| US5137668A (en) * | 1989-07-21 | 1992-08-11 | Fortifiber Corporation | Method for making pressboard from poly-coated paper using relative movement of facing webs |
| DE10066343B4 (en) * | 2000-06-02 | 2013-01-03 | Steico Se | Process for producing a flexible wood-fiber insulating mat and insulating mat produced by this process |
| CN110241660A (en) * | 2019-05-17 | 2019-09-17 | 合肥宜果科技服务有限公司 | A kind of processing method of waste and old wrapping paper recycling and reusing |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2925630C3 (en) | 1982-05-13 |
| DE2925630B2 (en) | 1981-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2845112C3 (en) | Process and plant for the production of mats from cellulosic fibers and process for the production of molded parts from these | |
| DE202020104647U1 (en) | Wood fiber board and corresponding manufacturing plant | |
| WO2008145379A1 (en) | Multilayer sheet, in particular composed of hemp | |
| DE2845117C2 (en) | Process and plant for the production of sheet material which can be pressed into molded parts | |
| DE2925630A1 (en) | Cellulose moulding process - with duroplastic resin applied to part of raw material before processing | |
| DE10151368A1 (en) | Fiber mat, molded part made therefrom and process for its production | |
| DE2119397B2 (en) | Chipboard mfr. from sawdust - using blend of fine and sliced coarser particles | |
| EP0880430A1 (en) | Wood fibre damp slab | |
| DE3708875C3 (en) | Process for the production of moldings, in particular plates | |
| CH266380A (en) | Process for the production of feltable wood fibers for the production of moldings. | |
| EP3552787B1 (en) | Method for production of heat insulating material | |
| EP3860819A2 (en) | Material | |
| WO1999014022A1 (en) | Method for producing moulded bodies, moulded body and installation for carrying out said method | |
| DE4306439C1 (en) | Moulding, in particular in the form of a fibreboard, and process for the production thereof | |
| WO2012107055A1 (en) | Low binder content shaped body made of bulrush leaf fibres | |
| DE4037639C2 (en) | ||
| DE2117872C3 (en) | Process for the reuse of fibers obtained from sewage sludge | |
| EP4683776A1 (en) | Wood fiber board and method for producing a wood fiber board | |
| DE2018151C3 (en) | Process for making a dry laden fibrous material | |
| AT306346B (en) | Chipboard with a top layer of wood fibers on one or both sides and a process for the production of these wood fibers | |
| AT112256B (en) | Process for producing mechanical pulp. | |
| CH494096A (en) | Process for the production of wood fibers | |
| DE2811833A1 (en) | Hardboard having median strength and cohesive surface - is made from predominantly lignocellulose and cellulose fibres derived from waste paper and bark | |
| DE102010056491A1 (en) | Preparing a molded body, comprises crushing maritime plant material from saline environment to particles, mixing particles with binders and/or aggregates, compressing the mixture into molded body and curing binder under heat | |
| DE102020005697A1 (en) | Process for the production of material panels from chipboard and material panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| AF | Is addition to no. |
Ref country code: DE Ref document number: 2845112 Format of ref document f/p: P |
|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: SEEBER SYSTEMTECHNIK KG, GERNSBACH, 76593 GERNSBAC |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: SEEBER KG, 67547 WORMS, DE |
|
| 8340 | Patent of addition ceased/non-payment of fee of main patent |