DE7704563U1 - MULTI-LAYER MATERIAL PANEL - Google Patents
MULTI-LAYER MATERIAL PANELInfo
- Publication number
- DE7704563U1 DE7704563U1 DE7704563U DE7704563U DE7704563U1 DE 7704563 U1 DE7704563 U1 DE 7704563U1 DE 7704563 U DE7704563 U DE 7704563U DE 7704563 U DE7704563 U DE 7704563U DE 7704563 U1 DE7704563 U1 DE 7704563U1
- Authority
- DE
- Germany
- Prior art keywords
- chips
- wood
- layer
- layers
- mixed
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 title description 2
- 239000002023 wood Substances 0.000 claims description 20
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 2
- 230000010006 flight Effects 0.000 claims 1
- 239000011120 plywood Substances 0.000 description 10
- 239000011093 chipboard Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 241000218652 Larix Species 0.000 description 2
- 235000005590 Larix decidua Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001539525 Astrabe Species 0.000 description 1
- 241000157302 Bison bison athabascae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 101150012195 PREB gene Proteins 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- RZWWGOCLMSGROE-UHFFFAOYSA-N n-(2,6-dichlorophenyl)-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-sulfonamide Chemical compound N1=C2N=C(C)C=C(C)N2N=C1S(=O)(=O)NC1=C(Cl)C=CC=C1Cl RZWWGOCLMSGROE-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000007103 stamina Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- 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
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- 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
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
-
- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/06—Vegetal fibres
- B32B2262/062—Cellulose fibres, e.g. cotton
- B32B2262/067—Wood fibres
-
- 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
- B32B2419/00—Buildings or parts thereof
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
bison-werkebison works
Bahre 8 Greten GmbH S Co. KGStretcher 8 Greten GmbH S Co. KG
3257 Springe / Deister3257 Springe / Deister
L 11.001 L/stL 11.001 L / pc
Mehrschichtige HolzwerkstoffplatteMulti-layer wood-based panel
Die Erfindung bezieht sich auf eine mehrschichtige, symmetrisch aufgebaute Holzwerkstoffplatte aus mit Bindemitteln versetzten Spänen od. dgl., mit einer Mittelschicht und mit aus orientierten Spänen od. dgl. gebildeten Außenschichten. Derartige Holzwerkstoffplatten sind bekannt. The invention relates to a multilayer, symmetrical constructed wood-based panel from mixed with binders Chips or the like, with a middle layer and with outer layers formed from oriented chips or the like. Such wood-based panels are known.
Sie können aus einer oder mehreren Schichten aus gerichteten und damit abwechselnd aus ungerichteten Spänen bestehen (DTPS 976 840}. Liegt hierbei die Hauptfestigkeitsrichtung bzw. die Längsachse der Späne in den Außenschichten in der Richtung der Haupt-Zug- und Druckspannung des beanspruchten Plattenteiles, während die Mittelschicht aus wirr durcheinander liegenden Spänen aufgebaut ist, so besitzt die Platte zwar ein gutes Stehvermögen und gute Widerstandsfähigkeit ge&en sonstige Beanspruchungen, aber eine verhältnismäßig geringe Biegefestigkeit quer zur Hauptfestigkeitsrichtung bzw. quer zur Längsachse der Späne in den Außenschichten.They can be made up of one or more layers of directional and consist alternately of non-directional chips (DTPS 976 840}. the longitudinal axis of the chips in the outer layers in the direction the main tensile and compressive stress of the stressed plate part, while the middle layer consists of tangled shavings is constructed, the plate has a good stamina and good resistance to other stresses, but a relatively low flexural strength transverse to the main strength direction or transversely to the longitudinal axis of the chips in the outer layers.
Bekannt ist auch eine Verbundplatte (DT-AS 1 209 734), die aus einer Mittellage aus Furnierholz oder Schnittholz und aus Decklagen besteht, die ihrerseits eus untereinander und mit der Mittellage verleimten Spänen bestehen, die einheitlich im wesentlichen im rechten Winkel zur Faserrichtung des Holzes der Mittellage ausgerichtet sind. Dadurch ergeben sich in etwa die gleichen Festigkeitseigenschaften, wie sie die Deckfurnierlagen handelsüblichen Sperrholzes erfüllen. Die Mittellage kann aus einem geringwertigen Furnier bestehen, z.B. Äst«, Risse, Schlitze und andere Fnhler enthalten. Die Mittellose kann auch aus Schnitt-Tolzbrettchpn oder -stäben erstellt i..ein, die aus llolzribf al lenIs also known a composite plate (DT-AS 1,209,734) consisting of a middle layer of plywood or timber and of covering layers, which in turn eus consist with each other and with the central position of glue-coated chips, the substantially uniform at right angles to the fiber direction of the wood aligned with the central position. This results in roughly the same strength properties as the face veneer layers of commercially available plywood. The middle layer can consist of a low-quality veneer, for example knots, cracks, slits and other sensors. The destitute can also be created from cut wooden boards or sticks, which are made from wooden ribs
hergestellt wurden. Bei aus geringwertigem Furnier bzw. aus Schnittholzbrettchen oder -stäben zusammengesetzten Mittellagen ist unbefriedigend, daß beide Ausgangsmaterialien eigens erzeugt werden müssen, was, abgesehen von der zunehmenden Verknappung von Rohholz für die Herstellung von Holzwerkstoffplatten, aufwendig und damit kostspielig ist.were manufactured. In the case of middle layers composed of low-quality veneer or of sawn timber boards or rods is unsatisfactory that both starting materials are specifically must be produced, which, apart from the increasing scarcity of raw wood for the production of wood-based panels, is complex and therefore costly.
Der Erfindung liegt daher die Aufgabe zugrunde, eine mehrschichtige Holzwerkstoffplatte der eingangs genannten Art so auszubilden, daß sie hohe Festigkeitswerte, insbesondere eine verbesserte Querbiegefestigkeit aufweist, und trotzdem der zunehmenden Rohholzverknappung Rechnung getragen ist.The invention is therefore based on the object of a multi-layer To train wood-based panel of the type mentioned so that they have high strength values, in particular a has improved transverse bending strength, and nevertheless the increasing Shortage of raw wood is taken into account.
Diese Aufgabe wird erfindungsgemäß dadurch gelost, daß die Mittelschicht über ihren ganzen Querschnitt aus mit Bindemittel versetzten, feinen lignozellulosehaltigen Teilchen besteht und die Späne von je zwei Schichten (2, 4j 3, 5], die sich auf jeder Breitseite der Mittelschicht (1) an diese anschließen, derart orientiert sind, daß die Spanlängsrichtung der Späne der ersten Schicht (2i 3) unter einem im wesentlichen rechten Winkel zur Spanlängsrichtung der Späne in der.anderen Schicht (4| 5) verläuft.This object is achieved according to the invention in that the Middle layer consists of fine lignocellulose-containing particles mixed with binder over its entire cross-section and the chips of two layers each (2, 4j 3, 5], the adjoin this on each broad side of the middle layer (1) and are oriented in such a way that the longitudinal direction of the chip the chips of the first layer (2i 3) at an essentially right angle to the chip longitudinal direction of the chips in the other Layer (4 | 5) runs.
Bei einem solchen Aufbau einer Span-Sperrholzplatte läßt sich je nach Holzqualität eine Holzausnutzung bis zu ca. 80% und mehr erreichen, während sie bei herkömmlichen Sperrholzplatte!, nur ca. 50 - 55 % beträgt. Erreicht wird außerdem eine hohe Querzugfestigkeit der Platte, da in ihrer Mittelschicht feine» mit Bindemittel versetzte» lignozellulosehaltige Teilchen vor* handen sind. Darüberhinaus wird das Verhältnis der Biegefestigkeit in Längs- und Querrichtung der Platte dadurch wesentlich verbessert, daß auch die Schichten, die die Querbiegefestigkeit der Platten bestimmen, aus der bei Biegebeanspruchung neutralen Plattenmitte verlagert und in der beim Biegeversuch auf Zug beanspruchten Plattenzone angeordnet sind. Die BiegefestigkeitWith such a structure of a chipboard plywood panel, depending on the wood quality, a wood utilization of up to approx. 80% and more can be achieved, whereas it is only approx. 50-55% with conventional plywood panels. A high transverse tensile strength of the board is also achieved, as fine lignocellulose-containing particles are present in its middle layer. In addition, the ratio of the flexural strength in the longitudinal and transverse directions of the plate is significantly improved by the fact that the layers that determine the transverse flexural strength of the plates are also displaced from the center of the plate, which is neutral when subjected to bending, and are arranged in the plate zone that is subjected to tensile stress during the bending test. The flexural strength
der Platte kann daher entweder vorzugsweise in einer Richtung oder auch in Längs- und Querrichtung annähernd gleich sein. the plate can therefore either preferably be approximately the same in one direction or also in the longitudinal and transverse directions.
Im Rahmen der Erfindung ist aber auch noch eine weitere Ausführungsform möglich und sogar besonders bevorzugt, um zusätzliche wirtschaftliche Vorteile zu erzielen. Diese Ausführungsform ist dadurch gekennzeichnet, daß die Mittelschicht der Span-Sperrholzplatte stark zerkleinerte Holz- und/oder holzartige Abfälle, wie Sägespäne, stark zerkleinerte Hobelspäne oder ebenso zerkleinerte Einjahrespflanzen aufweist, die jeweils mit Bindemittel versetzt sind.Within the scope of the invention, however, a further embodiment is also possible and even particularly preferred in order to achieve additional economic advantages. This embodiment is characterized in that the middle layer the chip-plywood panel has heavily shredded wood and / or wood-like waste, such as sawdust, heavily shredded wood shavings or equally shredded annual plants which are each mixed with binding agent.
Zweckmäßig ist es, die im äußeren Bereich der Platte angeordneten, aus ausgerichteten und mit Bindemittel versetzten Spänen bestehenden Schichten in an sich bekannter Weise mit einer feinen Deckschicht zu versehen. Diese Feindeckschicht kann auch mit Bindemittel versetztes Späne- und/oder Faser-Material enthalten. Hierfür lässt sich mit Vorteil Feingut und/oder Staub verwenden, die bei der Herstellung derjenigen Späne anfallen, welche die Biegefestigkeit der Span-Sperrholzplatte ergeben.It is useful to have those arranged in the outer region of the plate, aligned and offset with binding agent To provide shavings existing layers in a known manner with a fine top layer. This fine top layer can also contain chips and / or fiber material mixed with binding agent. Fine material can advantageously be used for this and / or use dust that is produced during the manufacture of those chips which give the chipboard plywood board its flexural strength.
Die Erfindung wird an Hand zweier in der Zeichnung dargestellten Ausführungsbeispiele nachstehend näher erläutert. Es zeigt:The invention is illustrated by means of two in the drawing Embodiments explained in more detail below. It shows:
Figur 1 eine fünfschichtige, erfindungsgemäß aufgebaute Span-Sperrholzplatte undFigure 1 is a five-layer, constructed according to the invention Chipboard and plywood
Figur 2 eine siebenschichtige, erfindungsgemäß aufgebaute Span-Sperrholzplatte.FIG. 2 shows a seven-layer chipboard plywood panel constructed according to the invention.
Die Mittelschicht 1 der Platte nach Figur 1 besteht aus feinen, beleimten Holzteilchen. Unter "feinen" Holzteilchen versteht man im allgemeinen solche, die durch ein Sieb mit der Maschenweite 4-6 mm hindurchfallen, durch ein Sieb mit einer Maschen-The middle layer 1 of the plate according to Figure 1 consists of fine, glued wood particles. "Fine" wood particles are generally understood to mean those that fall through a sieve with a mesh size of 4-6 mm, through a sieve with a mesh
weite von 2 mm jedoch nicht mehr. Auf der oberen und auf der unteren Breitseite dieser Mittelschicht befinden sich je eine Schicht 2 bzw, 3 . Die in diesen Schichten befindlichen, beleimten Späne sind im wesentlichen in Querrichtung der länglichen Platte ausgerichtet. Typische Abmessungen solcher Späne liegen bei 40-70 mm Länge» 5-10 mm Breite und 0,3-0,7 mm Dicke. An die jeweilige obere und untere Breitseite der Schichten 2,3 schließen sich Schichten 4 bzw. 5 an, die aus in Längsrichtung der Platte ausgerichteten, beleimten Spänen gebildet sind. Diese Späne können ebenfalls die vorgenannten Abmessungen haben. Eine flachgepreßte, fünfschichtige Span-Sperrholzplatte gemäß Figur 1, 12 mm dick, Holzart Lärche, hat bei einem Festharzgehalt von 6 % auf atro Späne folgende Eigenschaften:width of 2 mm no longer. A layer 2 or 3 is located on the upper and lower broad side of this middle layer. The glued chips located in these layers are oriented essentially in the transverse direction of the elongated plate. Typical dimensions of such chips are 40-70 mm long, 5-10 mm wide and 0.3-0.7 mm thick. The respective upper and lower broad sides of the layers 2, 3 are followed by layers 4 and 5, respectively, which are formed from glued chips aligned in the longitudinal direction of the plate. These chips can also have the aforementioned dimensions. A flat-pressed, five-layer chipboard plywood board according to Figure 1, 12 mm thick, wood type larch, has the following properties with a solid resin content of 6% on absolutely dry chips:
Biegefestigkeit II , N/mm" 44,0 Biegefestigkeit 1 , N/mm2 21,5Flexural Strength II, N / mm "44.0 Flexural Strength 1, N / mm 2 21.5
V20, N/mm2 0,61V 20 , N / mm2 0.61
Linearausdehnung Il 0,060 % Linearausdehnung 1 0,14 %Linear expansion Il 0.060% Linear expansion 1 0.14%
Im Falle des Ausführungsbeispieles der Figur 2 sind die jeweilige obere und untere Breitseite der Schichten 4,5 mit Deckschichten 6,7·aus feinen, beleimten und lignozellulosehaltigen •eilchen versehen, so daß die Span-Sperrholzplatte einen siebenschichtigen Aufbau aufweist. Eine solche Platte ist als Möbelplatte einsetzbar. Sie erreicht, hergestellt aus Lärche* im Flach· preBverfahren bei einem Festharzgehalt von 10 % auf atro Späne in den anderen Schichten, folgende Eigenschaften:In the case of the exemplary embodiment in FIG. 2, the respective upper and lower broad sides of the layers 4, 5 with cover layers 6, 7 are made of fine, glued and lignocellulosic • Provided little pieces so that the chipboard plywood has a seven-layer structure. Such a plate can be used as a furniture plate. They reached, made of larch * in the flat PreB process with a solid resin content of 10% on absolutely dry chips in the other layers, the following properties:
till I · · ··· till I · · ···
Querzugfestigkeit, N/mm 0,50Transverse tensile strength, N / mm 0.50
Quellung, 2 Std., % 4,7Swell, 2 hours,% 4.7
Quellung, 24 Std., % 14,1Swelling, 24 hours,% 14.1
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE7704563U DE7704563U1 (en) | 1977-02-15 | 1977-02-15 | MULTI-LAYER MATERIAL PANEL |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE7704563U DE7704563U1 (en) | 1977-02-15 | 1977-02-15 | MULTI-LAYER MATERIAL PANEL |
Publications (1)
Publication Number | Publication Date |
---|---|
DE7704563U1 true DE7704563U1 (en) | 1978-05-11 |
Family
ID=6675532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE7704563U Expired DE7704563U1 (en) | 1977-02-15 | 1977-02-15 | MULTI-LAYER MATERIAL PANEL |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE7704563U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4037865A1 (en) * | 1990-11-28 | 1992-06-11 | Theodor Hufer Gmbh | Sound-proofing union plate - has core of pressed wood and/or cellulose in form of briquettes |
US5425976A (en) * | 1990-04-03 | 1995-06-20 | Masonite Corporation | Oriented strand board-fiberboard composite structure and method of making the same |
US5470631A (en) * | 1990-04-03 | 1995-11-28 | Masonite Corporation | Flat oriented strand board-fiberboard composite structure and method of making the same |
-
1977
- 1977-02-15 DE DE7704563U patent/DE7704563U1/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5425976A (en) * | 1990-04-03 | 1995-06-20 | Masonite Corporation | Oriented strand board-fiberboard composite structure and method of making the same |
US5470631A (en) * | 1990-04-03 | 1995-11-28 | Masonite Corporation | Flat oriented strand board-fiberboard composite structure and method of making the same |
US5525394A (en) * | 1990-04-03 | 1996-06-11 | Masonite Corporation | Oriented strand board-fiberboard composite structure and method of making the same |
US5718786A (en) * | 1990-04-03 | 1998-02-17 | Masonite Corporation | Flat oriented strand board-fiberboard composite structure and method of making the same |
DE4037865A1 (en) * | 1990-11-28 | 1992-06-11 | Theodor Hufer Gmbh | Sound-proofing union plate - has core of pressed wood and/or cellulose in form of briquettes |
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