DE19643246A1 - Composite material used for internal structural material etc. - Google Patents
Composite material used for internal structural material etc.Info
- Publication number
- DE19643246A1 DE19643246A1 DE19643246A DE19643246A DE19643246A1 DE 19643246 A1 DE19643246 A1 DE 19643246A1 DE 19643246 A DE19643246 A DE 19643246A DE 19643246 A DE19643246 A DE 19643246A DE 19643246 A1 DE19643246 A1 DE 19643246A1
- Authority
- DE
- Germany
- Prior art keywords
- scraps
- composite material
- material according
- binder
- plates
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/025—Particulate layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/70—Scrap or recycled material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
Die Erfindung betrifft einen Verbundwerkstoff aus mechanisch aufgeschlossenen, zellulosehaltigen Stoffen, die unter Druck- und Wärmeeinwirkung miteinander verbunden werden. Ferner betrifft die Erfindung ein Verfahren zur Herstellung eines solchen Verbundwerkstoffes.The invention relates to a composite material of mechanically digested, cellulose-containing substances that are bonded together under pressure and heat become. Furthermore, the invention relates to a method for producing such Composite.
Ein bekannter Verbundwerkstoff dieser Art (P 45 40 241.9) besteht aus harzgetränktem Fasermaterial, insbesondere Holzfasern, aber auch anderen pflanzlicher, insbesondere langen Fasern, beispielsweise Sisal-, Flachs-, Jute- oder Kakaofasern. Aus diesem bekannten Verbundwerkstoff sollen Trennwände, Sitz- und Raumverkleidungen sowie Abdeckungen von Maschinengehäusen und Verkleidungen für Kraftfahrzeuge hergestellt werden, wobei an die dreidimensionale Verformbarkeit sowie Widerstandsfähigkeit des Werkstoffes gegen Stoß und mechanische Beschädigungen und auch seinen mechanischen Bearbeitbarkeit relativ hohe Anforderungen gestellt werden.A known composite material of this type (P 45 40 241.9) consists of resin impregnated Fiber material, in particular wood fibers, but also other vegetable, especially long Fibers, for example sisal, flax, jute or cocoa fibers. For this known Composite should partition walls, seat and room coverings and covers of Machine housings and panels for motor vehicles are produced, wherein the three-dimensional deformability and resistance of the material to shock and mechanical damage and also its mechanical workability relatively high Requirements are made.
Es sind ferner Schichtstoffe aus Hartpapier und Harzgewebe bekannt, die sehr gute Festigkeitseigenschatten und günstige elektrische Werte aufweisen, jedoch bezüglich ihrer Verformbarkeit zu wünschen übrig lassen.There are also laminates of hard paper and resin fabric known, the very good Have strength properties and favorable electrical values, but with respect to their Deformability leave something to be desired.
Des weiteren sind Hartfaserplatten bekannt, die aus geschnitzelten und zu einer zähflüssigen Suspension verarbeiteten Hölzern gewöhnlich minderer Qualität hergestellt werden, denen ein Bindemittel zugesetzt wird. Derartige Platten sind jedoch relativ feuchtigkeitsempfindlich und infolge ihrer hohen Dichte auch schwer und daher der weiteren Verbreitung, die sie gefunden haben, für die Verwendung als Bauplatten, insbesondere im Innenbereich, verhältnismäßig unhandlich. Darüber hinaus sind auch noch harzgetränkte Holzfaserplatten bekannt geworden, deren Steifigkeit und Festigkeit jedoch zu wünschen übrig lassen.Furthermore, hardboards are known, which are made of sliced and viscous Suspension processed woods are usually made of inferior quality to which a Binder is added. However, such plates are relatively sensitive to moisture and Due to their high density also heavy and therefore the wider distribution that they found have, for use as structural panels, especially indoors, relatively unwieldy. In addition, resin-impregnated wood fiber boards have also become known. however, their rigidity and strength leave something to be desired.
All diese bekannten Verbundwerkstoffe ist jedoch die Tatsache eigen, das sie aus zellulosehaltigen Naturstoffen hergestellt werden, die zu diesem Zweck mit einem mehr oder weniger großen Kostenaufwand erzeugt werden müssen und deshalb nicht als umweltschonende und ressourcensparende Stoffe zu betrachten sind.However, all these known composites own the fact that they are made cellulose-containing natural products, for this purpose with a more or less less costly to be generated and therefore not as Environmentally friendly and resource-saving substances are to be considered.
Die Aufgabe der Erfindung besteht deshalb darin, einen Verbundwerkstoff zu entwickeln, der im Hinblick auf das gewachsene Umweltbewußtsein aus Stoffen aufgebaut ist, die Wertstoffe im Sinne der gängigen Definition darstellen und die nicht oder in einem weit geringerem Ausmaß die Ressourcen belasten, wobei auch ein Beitrag zur Entlastung der Kreislaufwirtschaft geleistet werden soll, ohne daß der neue Verbundwerkstoff qualitativ hinter den bekannten Werkstoffen der genannten Art zurücksteht. The object of the invention is therefore to develop a composite material, the In view of the growing environmental awareness, it is made up of substances that are valuable substances represent the common definition and not or in a much lesser Extent of resources, while also contributing to the relief of Circular economy should be done without the new composite quality behind the known materials of the type mentioned stands.
Diese Aufgabe wird gemäß Anspruch 1 dadurch gelöst, daß die Stoffe aus recycelten Wertstoffen aus wenigstens einem der Materialien wie Wellpappe, Zeitungen, Deinkingware, Endlospapier, Papier und Pappe besteht, die zu Scraps (Schnitzeln) trocken zerschnitzelt, nicht zerfasert, danach mit einem synthetischen oder organischen Bindemittel zumindest teilweise benetzt und unter Bildung von Lufteinschlüssen zusammengeschüttet und zu Platten oder Formkörpern verpreßt worden sind.This object is achieved according to claim 1, characterized in that the substances from recycled Recyclable materials from at least one of the materials such as corrugated cardboard, newspapers, deinking Continuous paper, paper and cardboard, which shreds dry into scraps, does not exist defibered, then at least partially with a synthetic or organic binder wetted and pooled to form trapped air and plates or Moldings have been pressed.
Zur Herstellung eines solchen Verbundwerkstoffes dient gemäß Anspruch 12 ein Verfahren, wonach die recycelten Wertstoffen zu Scraps zerrissen oder zerschnitzelt und danach mit einem synthetischen oder organischen Bindemittel benetzt und zu einem Schütthaufen zusammengeschüttet und unter einem Druck von 160 bis 230 bar und einer Temperatur von 100 bis 200°C zu einer Platte unter Aufrechterhaltung von Lufteinschlüssen verpreßt werden. Dabei haben sich in einer Versuchsanlage ein mittlerer Druck von 180 bar und eine mittlere Temperatur von 160°C besonders bewährt.For the production of such a composite material according to claim 12 is a method, after which the recycled recyclables are shredded or shredded into scraps and then with wetted a synthetic or organic binder and a pile of piles poured together and under a pressure of 160 to 230 bar and a temperature of 100 to 200 ° C to a plate while maintaining trapped air. Here, in a pilot plant a mean pressure of 180 bar and a medium Temperature of 160 ° C particularly proven.
Durch die Maßnahmen wird ein Verbundwerkstoff geschaffen, der im wesentlichen ausschließlich aus recycelten Wertstoffen besteht und dessen Eigenschaften mit denjenigen anderer bekannter Verbundwerkstoffe, insbesondere Spanplatte, vergleichbar sind.The measures create a composite material that is essentially exclusively made of recycled recyclables and its properties with those other known composite materials, in particular chipboard, are comparable.
Vorteilhatte Ausführungsmöglichkeiten des erfindungsgemäßen Verbundwerkstoffes sowie der Verfahrensweise seiner Herstellung werden im folgenden unter Bezugnahme auf die in der Zeichnung schematisch dargestellten beiden Ausführungsbeispiele plattenförmiger Verbundwerkstoffkörper erläutert.Advantageous embodiments of the composite material according to the invention and the The method of its preparation will be described below with reference to the in Drawing schematically illustrated two embodiments plate-shaped Composite body explained.
In der Zeichnung zeigenIn the drawing show
Fig. 1 eine Draufsicht einer Platte des Verbundwerkstoffes Fig. 1 is a plan view of a plate of the composite material
Fig. 2 eine Querschnittsansicht der Platte von Fig. 1 und Fig. 2 is a cross-sectional view of the plate of Fig. 1 and
Fig. 3 eine Querschnittsansicht einer aus drei Schichten geschütteten bzw. einzelnen Platten unterschiedlicher Qualität sandwichartig zusammengebauten Platte ähnlich der von Fig. 1, wobei die Dicke der Einzelplatten kleiner ist als der von Fig. 1. Fig. 3 is a cross sectional view of a three-layer dumped or individual plates different quality sandwiched assembled panel similar to that of Fig. 1, wherein the thickness of the individual plates is smaller than that of FIG. 1.
Die in Fig. 1 und 2 gezeigte Platte von im wesentlichen homogener Struktur besteht aus einem recycelten Werkstoff in Form von bekannten Apparaten zu Scraps zerschnitzelten Zeitungen (oder anderen oben beschriebenen Altpapieren), die mit einem synthetischen oder organischen Bindemittel benetzt wurden und zu einem Schütthaufen zusammengeschüttet und unter einem Druck von 160 bis 230 bei einer Temperatur von 100 bis 200°C miteinander verpreßt worden sind, wobei die in dem Schüttgut vorhandenen Lufteinschlüsse zumindest teilweise aufrechterhalten wurden. Eine Vorsortierung der Scraps nach Größe war vorgenommen worden ebenso eine Trocknung der zusammengeschütteten Scraps aus eine Restfeuchte von 0,1 bis 10%.The plate of substantially homogeneous structure shown in Figures 1 and 2 consists of a recycled material in the form of known apparatus into shredded newspapers (or other waste papers described above) which have been wetted with a synthetic or organic binder and poured into a pile of piles and under a pressure of 160 to 230 at a temperature of 100 to 200 ° C have been pressed together, wherein the present in the bulk material air inclusions were at least partially maintained. Pre-sorting of the scalps by size had been done as well as drying of the spilled scraps from a residual moisture of 0.1 to 10%.
Des weiteren wurden vor ihrer Verpressung Zusatzstoffe in den Schüttguthaufen zwecks Abwehr von Feuchtigkeit, Pilzen, Bakterien, Insekten und dgl. Eingemischt, und zwar entweder in gasförmiger oder flüssiger Form. Wahlweise wurde auch ein gewünschter Farbstoff zugesetzt, um für die fertiggepreßte Platte eine gewünschte Farbgebung zu erzielen.Furthermore, prior to their compression, additives were added to the bulk heap Defense against moisture, fungi, bacteria, insects and the like. Intermixed, and indeed either in gaseous or liquid form. Optionally also became a desired one Dye added to achieve a desired color for the finished pressed plate.
Die in Fig. 1 und 2 gezeigte Platte ist aus feinen Scraps aufgebaut und qualitativ hochwertig. Dies wurde dadurch erreicht, daß die Benetzung der Scraps mit Klebstoff in einem Fließbett oder Wirbelstrom erfolgte, in dem durch Düsen das Bindemittel in die Wirbelschicht aus Feststoffe und Luft eingesprüht worden ist und das die Verpressung der Scraps danach zu Platten gewünschter Größe und Dichte (400 bis 600 kg/mm³ für Dämmplatten und 600 bis 850 kg/mm³ für Konstruktionsplatten) in einer kontinuierlichen arbeitenden Kontaktpresse vorgenommen wurde, wobei dafür gesorgt wurde, daß durch die im Schüttgut der Scraps vorhandenen Lufteinschlüsse ein gewünschtes Luftvolumen erhalten blieb, das das spezifische Gewicht bzw. die Dichte der Platte 1 bestimmt.The plate shown in Fig. 1 and 2 is constructed of fine scraps and high quality. This was achieved by wetting the scratches with adhesive in a fluidized bed or eddy current in which the binder had been sprayed into the fluidized bed of solids and air through nozzles and the compression of the scraps thereafter to plates of desired size and density (400 up to 600 kg / mm³ for insulation boards and 600 to 850 kg / mm³ for construction boards) was carried out in a continuous working contact press, whereby it was ensured that the air pockets present in the bulk of the scraps a desired air volume was maintained, the specific gravity or The density of the plate 1 is determined.
Darüber hinaus wurde bei der Verpressung der Platte 1 darauf geachtet, daß ihre beiden Oberflächen eine vollständig geschlossene oder überwiegend geschlossene Struktur erhalten, so daß sich der spätere Farbmengenauftrag, falls die Platte, die beispielsweise für den Innenausbau oder den Möbelbau vorgesehen ist, entsprechend angestrichen, imprägniert oder furniert werden muß, in Grenzen hält.In addition, care was taken in the pressing of the plate 1 that their two surfaces get a completely closed or predominantly closed structure, so that the later Farbmengenauftrag, if the plate, which is intended for example for interior or furniture, painted accordingly, impregnated or veneered, keeps within limits.
Die aus einer einzelnen Platte 1 oder aus mehreren Schichten 3, 4, 5 bestehende Werkstoffplatte bildet einen Verbundwerkstoff, der sich nicht nur leicht verarbeiten läßt, sondern auch ein vergleichsweise geringes Gewicht aufweist bei einer überraschend guten Biegefestigkeit und Steifigkeit. Darüber hinaus zeichnet sich dieser Verbundwerkstoff durch eine relativ hohe Druckfestigkeit sowie Wärmeisolierungs- und Schallisolierungseigenschatten aus. Dadurch, daß das Ausgangsmaterial dieses Verbundwerkstoffes aus den genannten recycelten Materialien besteht, ist er auch umweltfreundlich, wobei in Anbetracht der Tatsache, daß allein in Deutschland derzeit jährlich etwa 3 Mio. Tonnen Altpapier anfallen, die mangels einer anderen Verwertungsmöglichkeit thermisch entsorgt werden müssen, die erfindungsmäßige Art der Verwertung erhebliche Vorteile bietet und damit gesamtwirtschaftlich gesehen zu einer wesentlichen Schonung der Ressourcen beiträgt.The material plate consisting of a single plate 1 or of several layers 3 , 4 , 5 forms a composite material which is not only easy to process, but also has a comparatively low weight with surprisingly good flexural strength and rigidity. In addition, this composite is characterized by a relatively high compressive strength as well as thermal insulation and sound insulation properties. The fact that the starting material of this composite material consists of the above-mentioned recycled materials, it is also environmentally friendly, taking into account the fact that currently in Germany alone annually incurred about 3 million tonnes of waste paper, which must be disposed of thermally for lack of another recovery option, the inventive type of recovery offers significant benefits and thus contributes to overall economic conservation of resources.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19643246A DE19643246A1 (en) | 1996-02-27 | 1996-10-19 | Composite material used for internal structural material etc. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996203564 DE29603564U1 (en) | 1996-02-27 | 1996-02-27 | Composite |
DE19643246A DE19643246A1 (en) | 1996-02-27 | 1996-10-19 | Composite material used for internal structural material etc. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19643246A1 true DE19643246A1 (en) | 1998-01-08 |
Family
ID=8020179
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1996203564 Expired - Lifetime DE29603564U1 (en) | 1996-02-27 | 1996-02-27 | Composite |
DE19643246A Withdrawn DE19643246A1 (en) | 1996-02-27 | 1996-10-19 | Composite material used for internal structural material etc. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1996203564 Expired - Lifetime DE29603564U1 (en) | 1996-02-27 | 1996-02-27 | Composite |
Country Status (1)
Country | Link |
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DE (2) | DE29603564U1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19947856B4 (en) * | 1998-10-14 | 2005-04-28 | Tetra Laval Holdings & Finance | Fiberboard and method of making fiberboard |
DE102006062285B4 (en) * | 2006-12-22 | 2009-05-28 | Fritz Egger Gmbh & Co. | Fiberboard and process for its production |
DE102008024155A1 (en) * | 2008-02-28 | 2009-09-03 | Ben Dratz | Process for the production of a molded article from waste paper and / or waste cardboard, shaped article and building part |
DE102012108446A1 (en) * | 2012-09-11 | 2014-03-13 | Birco Gmbh | Gutter covering useful for drainage gutters, comprises a molded body made of a paper-containing material which is impregnated with plastic |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007025063B4 (en) * | 2007-05-29 | 2009-05-20 | Werzalit Gmbh + Co. Kg | Process for producing a multilayer composite molding |
DE102007028374B4 (en) * | 2007-06-11 | 2009-04-23 | Ava - Anhaltinische Verfahrens- Und Anlagentechnik Gmbh | Process for producing a wood-plastic composite material |
-
1996
- 1996-02-27 DE DE1996203564 patent/DE29603564U1/en not_active Expired - Lifetime
- 1996-10-19 DE DE19643246A patent/DE19643246A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19947856B4 (en) * | 1998-10-14 | 2005-04-28 | Tetra Laval Holdings & Finance | Fiberboard and method of making fiberboard |
DE102006062285B4 (en) * | 2006-12-22 | 2009-05-28 | Fritz Egger Gmbh & Co. | Fiberboard and process for its production |
DE102008024155A1 (en) * | 2008-02-28 | 2009-09-03 | Ben Dratz | Process for the production of a molded article from waste paper and / or waste cardboard, shaped article and building part |
DE102012108446A1 (en) * | 2012-09-11 | 2014-03-13 | Birco Gmbh | Gutter covering useful for drainage gutters, comprises a molded body made of a paper-containing material which is impregnated with plastic |
Also Published As
Publication number | Publication date |
---|---|
DE29603564U1 (en) | 1996-07-25 |
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