EP0702115A1 - Plasterboard with coated glass fiber mat - Google Patents
Plasterboard with coated glass fiber mat Download PDFInfo
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- EP0702115A1 EP0702115A1 EP95114350A EP95114350A EP0702115A1 EP 0702115 A1 EP0702115 A1 EP 0702115A1 EP 95114350 A EP95114350 A EP 95114350A EP 95114350 A EP95114350 A EP 95114350A EP 0702115 A1 EP0702115 A1 EP 0702115A1
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- Prior art keywords
- coating
- calcium sulfate
- plasterboard
- weight
- coating composition
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- 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
- E04C2/04—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 concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/043—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 concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
Definitions
- the invention relates to a plasterboard with coated glass fleece layer, in which at least one side of a plate core is covered with the glass fleece layer, the side facing away from the plate core is provided with a calcium sulfate coating, forms the core of the core and on the one hand has penetrated the glass fleece layer and coating material forms the calcium sulfate coating and, on the other hand, has penetrated into the nonwoven glass layer, in which the coating composition is formed on the basis of a calcium sulfate and contains organic binder and in which the core composition is formed from calcium sulfate dihydrate, the calcium sulfate coating including the glass nonwoven layer on the plate core is held at any point across the board level with a lifting strength measured at right angles to the board level, and the plasterboard is in the condition present shortly after production.
- the gypsum board is in an unprocessed state and a certain setting behavior can be assigned to the coating material.
- a plasterboard of this type is essentially known (DE-OS 39 37 433).
- the core mass is based on calcium sulfate dihydrate.
- the coating composition consists of an inorganic binder, at least partially set with water, including gypsum. None is said about the degree of setting or the setting speed of the mixture. Additions to adjust the setting speed of the plaster are not provided.
- the plasterboard in question has the advantage that there is no need for subsequent filling of the surface and this surface can be covered directly with emulsion paint, wallpaper, tiles or mats.
- the plasterboard is manufactured by first coating a nonwoven glass sheet on one side with a setting-capable mixture of an inorganic binder, such as calcium sulfate hemihydrate and water, rolling it up after partial setting and drying of the coating and then with the uncoated side with a setting-capable pasty mixture Mixture based on calcium sulfate hemihydrate and water is brought into contact so that this mixture only partially penetrates the glass fleece and thereby after Setting the plaster creates a gypsum building board laminated with the coated glass fleece.
- an inorganic binder such as calcium sulfate hemihydrate and water
- the coating composition sets quickly. No information is given on the extent of the at least partially existing binding. It is also not specified that the core composition and the coating composition have contact with one another in the glass fleece layer. If a gypsum building board of the type mentioned at the outset is to be useful in practice, then the quality of the bond from the calcium sulfate coating to the board core is important. The quality of this composite can be described by the lifting strength, which indicates the force / area with which a measuring disc adhered to the coating is pulled until the composite is destroyed. According to experiments with the known plasterboard of the type mentioned, a lifting strength of 0.1 N / mm2 is not sufficient for the practical use of the plasterboard.
- Delaminations or internal splitting can occur in the glass fleece layer, which is a considerable disadvantage particularly when applying heavy coatings such as heavy paper or textile wallpapers or ceramic tiles.
- To remedy this disadvantage there is no other option than to fill the surface with a suitable filler in a thin consistency so that it penetrates deeply into the fleece, thus strengthening the surface and improving the bond to the gypsum core. This means an additional cost-intensive operation on the construction site.
- the coating prevents glass fiber abrasion on the outer surface of the plasterboard.
- the plasterboard is cut or drilled, there is a significant amount of fiber abrasion at the processing points.
- the coating composition is relatively brittle and brittle, which can sometimes be seen in the wound rolls of the coated nonwoven, so that during processing, i.e. during drilling and sawing, glass fibers from the fleece, which are initially coated with coating material, are released. Glass fiber abrasion therefore occurs disadvantageously at the processing points.
- the plasterboard according to the invention is solving this problem, characterized in that the calcium sulfate of the coating composition is not or almost not set and that the core composition is brought into contact with the coating composition almost continuously so that the lifting resistance is at least 0.15 N / mm2 .
- the coating composition is tough and firm and does not release any glass fibers. Since the core mass is brought into almost full contact with the coating mass, there are no longer any fleece fibers that are not covered by the mass.
- the practically fiberglass-abrasion-free surface makes the new plasterboard also suitable for cladding ventilation shafts and cable ducts.
- the degree of penetration of the glass fleece layer with core material or the application of core material to coating material can be stated at any point in the calcium sulfate coating due to the improved lifting resistance.
- the plasterboard according to the invention has excellent coating properties, so that even heavy coating materials such as e.g. Wallpaper, tiles or mats, a firm and permanent bond with the plate, without the need for prior filling or any other elaborate treatment of the surface.
- the bond quality is particularly increased in that the calcium sulfate of the coating mass serves as a nucleating agent for the gypsum formation of the core mass. This creates at the junction between the core mass and Coating is a directional growth of a plaster layer, which has an extremely adhesive effect (epitaxy).
- the slow setting speed is generally given within the scope of the invention if the start of stiffening according to DIN 1168 is at least 1.5 hours and a maximum of 6 hours for the coated coating material. It is particularly expedient and advantageous if the start of stiffening of the coating composition is at least 2.5 hours and / or a maximum of 5 hours. In this setting time range, the invention has proven itself particularly well in practice.
- the calcium sulfate of the gypsum building board, which has not yet been processed, is present in a state that has not or hardly set; the degree of rehydration of the coating mass is ⁇ 5%, i.e. that a maximum of 5% of the calcium sulfate initially provided at the turn-on has been converted into calcium sulfate dihydrate.
- the calcium sulfate of the coating composition has not set to a degree of rehydration of at most 2%.
- the core mass and the coating mass in the glass fleece layer touch one another almost across the board.
- the separating surface between the core material area and the coating material area is partially formed by nonwoven fibers, so that the core material and coating material cannot come into contact in this surface area.
- the gypsum body of the core is porous due to the usual addition of air entraining agents and due to the evaporation of the excess mixing water during drying. In this respect, it is not very helpful to specify the extent of contact between the core material and the coating material by means of parts of a separating surface between the core material area and the coating material area. The degree of contact is therefore described by the lifting resistance.
- the core mass is brought into contact with the coating mass in such a way that the internal strength of the system, expressed by the lifting strength, is at least 0.15 N / mm2 at every point. It is particularly expedient and advantageous if there is an average lifting strength of at least 0.20 N / mm2.
- the plate according to the invention proves particularly well in practice at this limit value of the lifting resistance.
- the coating composition is calcium sulfate hemihydrate and contains additives which bring about a slow setting rate of the calcium sulfate hemihydrate.
- the additions ensure that the coating composition of the gypsum building board is not, or almost not, set.
- the calcium sulfate hemihydrate is rendered stucco.
- additives in the form of retarders are definitely added.
- Suitable retarders include e.g. Citric acid and protein hydrolyzates.
- the coating composition has the following composition, regardless of the added water: 60-95% by weight stucco, 0.01-1% by weight cellulose ether, 0.03-0.5% by weight Retarder, 0.05-1.0 wt% condenser. It is particularly advantageous if the coating composition contains up to 25% by weight of limestone powder and up to 5% by weight of PVAC dispersion. With such a coating compound, the nonwoven fibers are held particularly well in the plate and the glass fiber abrasion resistance is particularly good.
- the limestone flour is a filler.
- the condenser is e.g. Lignin sulfonate, a naphthalene sulfonic acid condensation product or a melamine resin.
- the coating composition contains a plasticizer.
- the plasticizer is only available in small quantities, e.g. a maximum of 5% by weight is available and e.g. a polyacrylate or a styrene / butadiene.
- the plasticizer makes the coating compound plastic and flexible, which improves its ability to permanently and firmly encase the fibers.
- the calcium sulfate is a calcium sulfate anhydrite which is fine-grained with a grain size of ⁇ 200 ⁇ m, preferably ⁇ 63 ⁇ m and is partially capable of setting.
- this special anhydrite can be provided as a plaster coating on the glass fleece layer.
- This anhydrite has an advantageous ability to penetrate the fleece surface and forms an optimal bond with the binder and fleece.
- the Anhydrite preferably has an average grain size d50 between and 8 and 12 microns.
- the coating composition has the following composition, regardless of the water added: at least 94% by weight calcium sulfate anhydrite, 0.01-0.8% by weight cellulose ether, 0.01- 1.0% by weight of condenser and a maximum of 0.2% of wetting agent.
- the organic binder which is provided in the coating composition in the present case is e.g. Polyacrylate or styrene acrylate.
- Organic binders generally worsen fire behavior and increase the toxicity of the smoke gases generated in the event of a fire.
- the proportion of binder can be kept relatively low. It is therefore particularly expedient and advantageous if the organic binder makes up less than 6% by weight of the dry coating composition.
- the calcium sulfate of the coating composition which has not or almost not set but is still reactive, thus makes it possible to reduce the proportion of organic binder.
- up to 40% by weight of aluminum hydroxide or boric acid is added to the coating composition. This ensures that the plasterboard meets the criteria for building material class A1 according to DIN 4102.
- the ratios of the glass fleece layer provided with the calcium sulfate coating are set such that the surface of the coating composition has an abrasion of at most 0.2 g. This low abrasion is due to the fact that organic binder, fleece and calcium sulfate form an optimal adhesive bond.
- the abrasion resistance is determined in accordance with DIN 53109, "Testing paper and cardboard: determination of abrasion using the friction wheel method” and ISO 4586-2 “Abration resistance of decorative laminated sheets. "The Teldyne Taber Standard Abrasion Tester serves as the abrasion device.
- the standardized emery paper S-33 is applied to the friction wheels. Each friction wheel is loaded with an additional weight of 500 g.
- the abrasion wheels are left with the emery paper S-33 10 Rotate the plate surface for one revolution after which the abrasion is determined by determining the weight difference.
- plasterboard according to the invention is that the resistance to lifting off after further surface treatment (primer, paint, wallpaper or plaster) is increased.
- Plates according to the invention of a production have an average lifting strength of 0.34 N / mm2 after production, the minimum value from six measurements across the plate width being 0.23 N / mm2.
- Part of the boards is painted with an aqueous dispersion primer, the other part is coated with a thin plaster based on gypsum.
- the average lifting strength reaches 0.42 N / mm2 after priming and 0.43 N / mm2 after thin-plaster application: the minimum values increase to 0.24 and 0.28 N / mm2.
- the coating composition based on calcium sulfate comprises either only hemihydrate or only anhydrite as an inorganic binder.
- the core mass is composed as it is common for plasterboard of the type in question and as it is used in conventional plasterboard.
- the gypsum building board according to the invention is produced on conventional manufacturing plants for gypsum plasterboard. After its production, the plasterboard is in the unprocessed state when it is stored and / or transported and / or mechanically fastened. A processed state exists when the plasterboard is installed in a building. If the coating mass on the installed plasterboard is covered with wallpaper, tiles or foils, it absorbs water and the calcium sulfate can partially rehydrate.
- the gypsum building board according to FIGS. 1 and 2 has a board core 1, on one surface side of which a glass fleece layer 2 adjoins, which is provided on the outside with a calcium sulfate coating 3.
- the glass fleece layer 2 is divided into two layer-like areas 4, 5, one area 4 being filled with a coating composition which also forms the coating 3, and the other area 5 is filled with a core composition which also forms the plate core 1.
- the core mass and the coating mass touch each other in the glass fleece layer 2 along a separating surface 6.
- FIG. 3 shows the perfect contact of both layers that have penetrated the glass fleece layer.
- iron oxide is added to the stucco before mixing.
- the electron beam microsensor is used to determine how far the core mass has penetrated the glass fleece.
- Position "1" shows no iron peak. Since such analyzes are too complex in practice, the extent of the contact is described by the lifting strength.
- the calcium sulfate coating 3 is as thin as a film and a maximum of 200 microns thick.
- the structure of the fleece can be seen through the coating 3, since this is like a thin spread on the fleece.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Finishing Walls (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
Die Erfindung betrifft eine Gipsbauplatte mit beschichteter Glasvlieslage, bei der mindestens eine Seite eines Plattenkerns mit der Glasvlieslage belegt ist, deren dem Plattenkern abgewendete Seite mit einer Calciumsulfat-Beschichtung versehen ist, bei der Kernmasse den Plattenkern bildet und einerseits in die Glasvlieslage eingedrungen ist und Beschichtungsmasse die Calciumsulfat-Beschichtung bildet und andererseits in die Glasvlieslage eingedrungen ist, bei der die Beschichtungsmasse auf der Basis eines Calciumsulfats gebildet ist und organisches Bindemittel enthalt und bei der die Kernmasse aus Calciumsulfat-Dihydrat gebildet ist, wobei die Calciumsulfat-Beschichtung samt Glasvlieslage an dem Plattenkern an jeder Stelle über die Plattenebene hin mit einer rechtwinkelig zur Plattenebene gemessenen Abhebefestigkeit gehalten ist und wobei die Gipsbauplatte sich in dem kurz nach der Fertigung vorliegenden Zustand befindet. Die Gipsbauplatte befindet sich in einem unverarbeiteten Zustand und der Beschichtungsmasse ist ein bestimmtes Abbindeverhalten zuzuordnen.The invention relates to a plasterboard with coated glass fleece layer, in which at least one side of a plate core is covered with the glass fleece layer, the side facing away from the plate core is provided with a calcium sulfate coating, forms the core of the core and on the one hand has penetrated the glass fleece layer and coating material forms the calcium sulfate coating and, on the other hand, has penetrated into the nonwoven glass layer, in which the coating composition is formed on the basis of a calcium sulfate and contains organic binder and in which the core composition is formed from calcium sulfate dihydrate, the calcium sulfate coating including the glass nonwoven layer on the plate core is held at any point across the board level with a lifting strength measured at right angles to the board level, and the plasterboard is in the condition present shortly after production. The gypsum board is in an unprocessed state and a certain setting behavior can be assigned to the coating material.
Eine Gipsbauplatte dieser Art ist im wesentlichen bekannt (DE-OS 39 37 433). Wie bei Gipsbauplatten üblich, ist die Kernmasse auf der Basis von Calciumsulfat-Dihydrat gebildet. Die Beschichtungsmasse besteht aus einem zumindest teilweise mit Wasser abgebundenen anorganischen Binder, unter anderem aus Gips. Über Abbindegrad oder Abbindegeschwindigkeit der Mischung ist nichts ausgesagt. Zusätze zur Einstellung der Abbindegeschwindigkeit des Gipses sind nicht vorgesehen. Die hier zur Rede stehende Gipsbauplatte hat den Vorteil, daß eine nachträgliche Verspachtelung der Oberfläche entfällt und sich diese Oberfläche unmittelbar mit Dispersionsfarbe, Tapete, Fliesen oder Matten belegen läßt. Die Herstellung der Gipsbauplatte erfolgt, indem zunächst eine Glasvliesbahn einseitig mit einem abbindefähigen Gemisch aus einem anorganischen Binder, wie z.B. Calciumsulfat-Halbhydrat und Wasser beschichtet, nach teilweisem Abbinden und Trocknen der Beschichtung aufgerollt und danach mit der nicht beschichteten Seite mit einem abbindefähigen pastösen Gemisch einer Mischung auf der Basis von Calciumsulfat-Halbhydrat und Wasser so in Berührung gebracht wird, daß dieses Gemisch nur teilweise in das Glasvlies eindringt und dabei nach dem Abbinden des Gipses eine mit dem beschichteten Glasvlies kaschierte Gipsbauplatte entsteht.A plasterboard of this type is essentially known (DE-OS 39 37 433). As is usual with plasterboard, the core mass is based on calcium sulfate dihydrate. The coating composition consists of an inorganic binder, at least partially set with water, including gypsum. Nothing is said about the degree of setting or the setting speed of the mixture. Additions to adjust the setting speed of the plaster are not provided. The plasterboard in question has the advantage that there is no need for subsequent filling of the surface and this surface can be covered directly with emulsion paint, wallpaper, tiles or mats. The plasterboard is manufactured by first coating a nonwoven glass sheet on one side with a setting-capable mixture of an inorganic binder, such as calcium sulfate hemihydrate and water, rolling it up after partial setting and drying of the coating and then with the uncoated side with a setting-capable pasty mixture Mixture based on calcium sulfate hemihydrate and water is brought into contact so that this mixture only partially penetrates the glass fleece and thereby after Setting the plaster creates a gypsum building board laminated with the coated glass fleece.
Bei der bekannten Gipsbauplatte der eingangs genannten Art ist die Beschichtungsmasse schnell abbindend. Über das Ausmaß der zumindest teilweise vorhandenen Abbindung ist keine Angabe gemacht. Es ist auch nicht angegeben, daß die Kernmasse und die Beschichtungsmasse in der Glasvlieslage miteinander Berührung haben. Wenn eine Gipsbauplatte der eingangs genannten Art für die Praxis brauchbar sein soll, dann ist die Güte des Verbundes von der Calciumsulfat-Beschichtung bis zum Plattenkern wichtig. Die Güte dieses Verbundes läßt sich durch die Abhebefestigkeit beschreiben, die angibt, mit welcher Kraft/Fläche an einer an die Beschichtung angeklebten Meßscheibe gezogen wird, bis eine Zerstörung des Verbundes erfolgt. Gemäß Versuchen mit der bekannten Gipsbauplatte der eingangs genannten Art ist eine Abhebefestigkeit von 0,1 N/mm² für den praktischen Gebrauch der Gipsbauplatte nicht ausreichend. Es kann zu Delaminationen bzw. inneren Spaltungen in der Glasvlieslage kommen, was insbesondere beim Aufbringen schwerer Beschichtungen wie schweren Papier- oder Textiltapeten oder keramischen Fliesen von erheblichem Nachteil ist. Zur Behebung dieses Nachteils bleibt nichts anderes übrig, als die Oberfläche mit einer geeigneten Spachtelmasse in dünner Konsistenz so zu überspachteln, daß diese tief in das Vlies eindringt und so eine Verfestigung der Oberfläche und eine verbesserte Bindung zum Gipskern bewirkt. Dies bedeutet einen zusätzlichen kostenintensiven Arbeitsgang auf der Baustelle.In the known plasterboard of the type mentioned, the coating composition sets quickly. No information is given on the extent of the at least partially existing binding. It is also not specified that the core composition and the coating composition have contact with one another in the glass fleece layer. If a gypsum building board of the type mentioned at the outset is to be useful in practice, then the quality of the bond from the calcium sulfate coating to the board core is important. The quality of this composite can be described by the lifting strength, which indicates the force / area with which a measuring disc adhered to the coating is pulled until the composite is destroyed. According to experiments with the known plasterboard of the type mentioned, a lifting strength of 0.1 N / mm² is not sufficient for the practical use of the plasterboard. Delaminations or internal splitting can occur in the glass fleece layer, which is a considerable disadvantage particularly when applying heavy coatings such as heavy paper or textile wallpapers or ceramic tiles. To remedy this disadvantage, there is no other option than to fill the surface with a suitable filler in a thin consistency so that it penetrates deeply into the fleece, thus strengthening the surface and improving the bond to the gypsum core. This means an additional cost-intensive operation on the construction site.
Durch die Beschichtung wird Glasfaserabrieb an der Außenfläche der Gipsbauplatte zwar verhindert. Wenn die Gipsbauplatte geschnitten oder gebohrt wird, dann tritt jedoch an den Bearbeitungsstellen Glasfaserabrieb in einem beachtlichen Umfang auf. Zum einen ist zwischen der Beschichtungsmasse und der Kernmasse ein Vliesbereich, in dem die Vliesfasern nicht von Masse umhüllt sind. Insbesondere aber ist die Beschichtungsmasse relativ spröde und brüchig, was sich mitunter schon an den aufgewickelten Rollen des beschichteten Vlieses zeigt, so daß beim Bearbeiten, d.h. beim Bohren und Sägen, Glasfasern aus dem Vlies, die zunächst von Beschichtungsmasse umhüllt sind, freigesetzt werden. An den Bearbeitungsstellen tritt also nachteiligerweise Glasfaserabrieb auf.The coating prevents glass fiber abrasion on the outer surface of the plasterboard. However, when the plasterboard is cut or drilled, there is a significant amount of fiber abrasion at the processing points. On the one hand, there is a nonwoven area between the coating composition and the core composition, in which the nonwoven fibers are not enveloped by the composition. In particular, however, the coating composition is relatively brittle and brittle, which can sometimes be seen in the wound rolls of the coated nonwoven, so that during processing, i.e. during drilling and sawing, glass fibers from the fleece, which are initially coated with coating material, are released. Glass fiber abrasion therefore occurs disadvantageously at the processing points.
Eine Aufgabe der Erfindung ist es somit, eine Gipsbauplatte der eingangs genannten Art zu schaffen, bei der an durch Sägen oder Bohren erzeugten Bearbeitungsstellen Glasfaserabrieb im wesentlichen nicht auftreten kann. Die erfindungsgemäße Gipsbauplatte ist, diese Aufgabe lösend, dadurch gekennzeichnet, daß das Calciumsulfat der Beschichtungsmasse nicht oder fast nicht abgebunden ist und daß die Kernmasse nahezu flächig durchgehend mit der Beschichtungsmasse in Berührung gebracht ist derart, daß die Abhebefestigkeit mindestens 0,15 N/mm² beträgt.It is therefore an object of the invention to provide a plasterboard of the type mentioned at the processing points produced by sawing or drilling Glass fiber abrasion essentially cannot occur. The plasterboard according to the invention is solving this problem, characterized in that the calcium sulfate of the coating composition is not or almost not set and that the core composition is brought into contact with the coating composition almost continuously so that the lifting resistance is at least 0.15 N / mm² .
Durch diese Gestaltung ist ein Glasfaserabrieb an Bearbeitungsstellen fast völlig vermieden. Die Beschichtungsmasse ist zäh und fest und gibt keine Glasfasern frei. Da die Kernmasse nahezu flächig mit der Beschichtungsmasse in Berührung gebracht ist, gibt es keine Vliesfasern mehr, die nicht von Masse umhüllt sind. Die praktisch glasfaser-abriebfreie Oberfläche macht die neuartige Gipsbauplatte auch für die Bekleidung von Lüftungsschächten und Kabelkanälen geeignet. Das Ausmaß der Durchdringung der Glasvlieslage mit Kernmasse bzw. der Anlage von Kernmasse an Beschichtungsmasse läßt sich durch die verbesserte Abhebefestigkeit an jeder Stelle der Calciumsulfat-Beschichtung angeben. Außerdem hat die erfindungsgemäße Gipsbauplatte ausgezeichnete Beschichtungseigenschaften, so daß auch schwere Beschichtungsmaterialien, wie z.B. Tapeten, Fliesen oder Matten, einen festen und dauerhaften Verbund mit der Platte eingehen, ohne daß vorheriges Verspachteln oder eine andere aufwendige Behandlung der Oberfläche erforderlich wäre.This design almost completely avoids glass fiber abrasion at processing points. The coating composition is tough and firm and does not release any glass fibers. Since the core mass is brought into almost full contact with the coating mass, there are no longer any fleece fibers that are not covered by the mass. The practically fiberglass-abrasion-free surface makes the new plasterboard also suitable for cladding ventilation shafts and cable ducts. The degree of penetration of the glass fleece layer with core material or the application of core material to coating material can be stated at any point in the calcium sulfate coating due to the improved lifting resistance. In addition, the plasterboard according to the invention has excellent coating properties, so that even heavy coating materials such as e.g. Wallpaper, tiles or mats, a firm and permanent bond with the plate, without the need for prior filling or any other elaborate treatment of the surface.
Unabhängig davon, wie tief die Beschichtungsmasse in die Glasvlieslage eingedrungen ist, ist dafür gesorgt, daß die Kernmasse so tief in die Glasvlieslage eingedrungen ist, daß die erwünschte durchgehende Berührung von Beschichtungsmasse und Kernmasse gegeben ist. Hierdurch ist auch eine Verbesserung der Abhebefestigkeit durch Verminderung der Gefahr von Spaltungen der Glasvlieslage gegeben. Es ist eine an sich bekannte (GB-OS 20 53 779) Technik, eine Gipsbauplatte so herzustellen, daß die Kernmasse in die Glasvlieslage mehr oder weniger weit eingedrungen ist. Bei der erfindungsgemäßen Gipsbauplatte ist die Kernmasse in die Glasvlieslage soweit eingedrungen, daß sie in durchgehenden Kontakt mit der schon vorher vorhandenen eingedrungenen Beschichtungsmasse gekommen ist.Regardless of how deeply the coating mass has penetrated into the glass fleece layer, it is ensured that the core mass has penetrated so deep into the glass fleece layer that the desired continuous contact of the coating mass and core mass is given. This also provides an improvement in the resistance to lifting off by reducing the risk of splitting of the glass fleece layer. It is a known technique (GB-OS 20 53 779) to produce a plasterboard in such a way that the core mass has more or less penetrated the nonwoven glass layer. In the plasterboard according to the invention, the core mass has penetrated into the glass fleece layer to such an extent that it has come into continuous contact with the previously penetrated coating mass.
Die Verbundgüte wird besonders dadurch erhöht, daß das Calciumsulfat der Beschichtungsmasse als Keimbildner für die Gipsbildung der Kernmasse dient. Dadurch entsteht an der Verbindungsstelle zwischen Kernmasse und Beschichtung ein gerichtetes Aufwachsen einer Gipsschicht, die äußerst haftverbessernd wirkt (Epitaxie).The bond quality is particularly increased in that the calcium sulfate of the coating mass serves as a nucleating agent for the gypsum formation of the core mass. This creates at the junction between the core mass and Coating is a directional growth of a plaster layer, which has an extremely adhesive effect (epitaxy).
Die langsame Abbindegeschwindigkeit ist im Rahmen der Erfindung in der Regel gegeben, wenn bei der angemachten Beschichtungsmasse der Versteifungsbeginn nach DIN 1168 mindestens 1,5 Std und maximal 6 Std beträgt. Besonders zweckmäßig und vorteilhaft ist es, wenn der Versteifungsbeginn der Beschichtungsmasse mindestens 2,5 Std und/oder maximal 5 Std beträgt. In diesem Abbindezeit-Bereich bewährt sich die Erfindung in der Praxis besonders gut.The slow setting speed is generally given within the scope of the invention if the start of stiffening according to DIN 1168 is at least 1.5 hours and a maximum of 6 hours for the coated coating material. It is particularly expedient and advantageous if the start of stiffening of the coating composition is at least 2.5 hours and / or a maximum of 5 hours. In this setting time range, the invention has proven itself particularly well in practice.
Das Calciumsulfat der noch nicht verarbeiteten Gipsbauplatte liegt in nicht oder fast nicht abgebundenem Zustand vor; der Rehydratationsgrad der Beschichtungsmasse ist < 5%, d.h. daß sich maximal 5% des zunächst beim Anmachen vorgesehenen Calciumsulfats in Calciumsulfat-Dihydrat umgewandelt haben. In der Regel ist jedoch das Calciumsulfat der Beschichtungsmasse bis auf einen Rehydratationsgrad von maximal 2% nicht abgebunden.The calcium sulfate of the gypsum building board, which has not yet been processed, is present in a state that has not or hardly set; the degree of rehydration of the coating mass is <5%, i.e. that a maximum of 5% of the calcium sulfate initially provided at the turn-on has been converted into calcium sulfate dihydrate. As a rule, however, the calcium sulfate of the coating composition has not set to a degree of rehydration of at most 2%.
Bei der erfindungsgemäßen Gipsbauplatte berühren einander die Kernmasse und die Beschichtungsmasse in der Glasvlieslage nahezu flächig durchgehend. Die Trennfläche zwischen dem Kernmasse-Bereich und dem Beschichtungsmasse-Bereich ist teilweise von Vliesfasern gebildet, so daß in diesem Flächenbereich eine Berührung von Kernmasse und Beschichtungsmasse nicht stattfinden kann. Außerdem ist der Gipskörper des Kerns durch den üblichen Zusatz an Luftporenbildnern und durch das Verdampfen des überschüssigen Anmachwassers während des Trocknens porös. Insofern ist es wenig hilfreich, das Ausmaß der Berührung zwischen Kernmasse und Beschichtungsmasse durch Anteile einer Trennfläche zwischen Kernmasse-Bereich und Beschichtungsmasse-Bereich anzugeben. Das Ausmaß der Berührung wird daher durch die Abhebefestigkeit beschrieben.In the plasterboard according to the invention, the core mass and the coating mass in the glass fleece layer touch one another almost across the board. The separating surface between the core material area and the coating material area is partially formed by nonwoven fibers, so that the core material and coating material cannot come into contact in this surface area. In addition, the gypsum body of the core is porous due to the usual addition of air entraining agents and due to the evaporation of the excess mixing water during drying. In this respect, it is not very helpful to specify the extent of contact between the core material and the coating material by means of parts of a separating surface between the core material area and the coating material area. The degree of contact is therefore described by the lifting resistance.
Bei der Gipsbauplatte ist also die Kernmasse mit der Beschichtungsmasse derart flächig in Berührung gebracht, daß die innere Festigkeit des Systems ausgedrückt durch die Abhebefestigkeit an jeder Stelle mindestens 0,15 N/mm² beträgt. Besonders zweckmäßig und vorteilhaft ist es, wenn eine mittlere Abhebefestigkeit von mindestens 0,20 N/mm² gegeben ist. Bei diesem Grenzwert der Abhebefestigkeit bewährt sich die erfindungsgemäße Platte in der Praxis besonders gut.In the case of the gypsum building board, the core mass is brought into contact with the coating mass in such a way that the internal strength of the system, expressed by the lifting strength, is at least 0.15 N / mm² at every point. It is particularly expedient and advantageous if there is an average lifting strength of at least 0.20 N / mm². The plate according to the invention proves particularly well in practice at this limit value of the lifting resistance.
Besonders zweckmäßig und vorteilhaft ist es, wenn die Beschichtungsmasse Calciumsulfat-Halbhydrat ist und Zusätze enthält, die eine langsame Abbindegeschwindigkeit des Calciumsulfat-Halbhydrats bewirken. Bei der Verwendung von Calciumsulfat-Halbhydrat wird durch die Zusätze erreicht, daß die Beschichtungsmasse der Gipsbauplatte nicht oder fast nicht abgebunden ist.It is particularly expedient and advantageous if the coating composition is calcium sulfate hemihydrate and contains additives which bring about a slow setting rate of the calcium sulfate hemihydrate. When using calcium sulfate hemihydrate, the additions ensure that the coating composition of the gypsum building board is not, or almost not, set.
In der Regel ist das Calciumsulfat-Halbhydrat erbrannter Stuckgips. Für die langsame Abbindegeschwindigkeit sind auf jeden Fall Zusätze in Form von Verzögerern zugegeben. Zu geeigneten Verzögerern gehören z.B. Zitronensäure und Eiweißhydrolysate.As a rule, the calcium sulfate hemihydrate is rendered stucco. For the slow setting speed, additives in the form of retarders are definitely added. Suitable retarders include e.g. Citric acid and protein hydrolyzates.
Besonders zweckmäßig und vorteilhaft ist es, wenn die Beschichtungsmasse beim Anmachen, unabhängig vom zugegebenen Wasser, folgende Zusammensetzung aufweist: 60-95 Gew.% Stuckgips, 0,01-1 Gew. % Celluloseether, 0,03-0,5 Gew. % Verzögerer, 0,05-1,0 Gew.% Verflüssiger. Besonders vorteilhaft ist es dabei, wenn die Beschichtungsmasse bis zu 25 Gew.% Kalksteinmehl und bis zu 5 Gew. % PVAC-Dispersion enthält. Mit einer solchen Beschichtungsmasse werden die Vliesfasern in der Platte besonders gut gehalten und ist die Glasfaser-Abriebfestigkeit besonders gut gegeben. Das Kalksteinmehl ist ein Füllstoff. Der Verflüssiger ist z.B. Ligninsulfonat, ein Naphtalinsulfonsäure-Kondensationsprodukt oder ein Melaminharz.It is particularly expedient and advantageous if the coating composition has the following composition, regardless of the added water: 60-95% by weight stucco, 0.01-1% by weight cellulose ether, 0.03-0.5% by weight Retarder, 0.05-1.0 wt% condenser. It is particularly advantageous if the coating composition contains up to 25% by weight of limestone powder and up to 5% by weight of PVAC dispersion. With such a coating compound, the nonwoven fibers are held particularly well in the plate and the glass fiber abrasion resistance is particularly good. The limestone flour is a filler. The condenser is e.g. Lignin sulfonate, a naphthalene sulfonic acid condensation product or a melamine resin.
Besonders zweckmäßig und vorteilhaft ist es auch, wenn die Beschichtungsmasse einen Plastifizierer enthält. Der Plastifizierer ist nur in geringen Mengen, z.B. maximal 5 Gew.% vorhanden und z.B. ein Polyacrylat oder ein Styrol/Butadien. Der Plastifizierer macht die Beschichtungsmasse plastisch und flexibel, was deren Fähigkeit, die Fasern dauerhaft und fest zu umhüllen, verbessert.It is also particularly expedient and advantageous if the coating composition contains a plasticizer. The plasticizer is only available in small quantities, e.g. a maximum of 5% by weight is available and e.g. a polyacrylate or a styrene / butadiene. The plasticizer makes the coating compound plastic and flexible, which improves its ability to permanently and firmly encase the fibers.
Eine andere besonders zweckmäßige und vorteilhafte Ausführungsform der Erfindung besteht darin, daß das Calciumsulfat ein Calciumsulfat-Anhydrit ist, der feinkörnig mit einer Korngröße < 200 µm, vorzugsweise < 63 µm ist und teilweise abbindefähig ist. Dieser spezielle Anhydrit läßt sich im vorliegenden Fall als Gipsbeschichtung der Glasvlieslage vorsehen. Dieser Anhydrit besitzt ein vorteilhaftes Eindringvermögen in die Vliesoberfläche und bildet mit Bindemittel und Vlies einen optimalen Haftverbund. Der Anhydrit weist vorzugsweise einen Korngrößenmittelwert d₅₀ zwischen und 8 und 12 µm auf.Another particularly expedient and advantageous embodiment of the invention consists in that the calcium sulfate is a calcium sulfate anhydrite which is fine-grained with a grain size of <200 μm, preferably <63 μm and is partially capable of setting. In the present case, this special anhydrite can be provided as a plaster coating on the glass fleece layer. This anhydrite has an advantageous ability to penetrate the fleece surface and forms an optimal bond with the binder and fleece. Of the Anhydrite preferably has an average grain size d₅₀ between and 8 and 12 microns.
Bei der Fertigung der Gipsbauplatte tritt an der Formstation beim Auflegen der beschichteten Glasvlieslage minimaler Calciumsulfat-Abrieb auf, der sich bei langen Produktionszeiten sammelt. Wenn das Calciumsulfat der Beschichtungsmasse Anhydrit ist, dann führt dieser Calciumsulfat-Abrieb nicht zu Anbackungen an den Fertigungsanlagen. Besonders zweckmäßig und vorteilhaft ist es in diesem Zusammenhang, wenn die Beschichtungsmasse beim Anmachen, unabhängig vom zugegebenen Wasser, folgende Zusammensetzung aufweist: Mindestens 94 Gew.% Calciumsulfat-Anhydrit, 0,01-0,8 Gew.% Celluloseether, 0,01-1,0 Gew.% Verflüssiger und maximal 0,2% Netzmittel.During the production of the plasterboard, minimal calcium sulfate abrasion occurs at the forming station when the coated glass fleece layer is placed on it, which accumulates during long production times. If the calcium sulfate in the coating material is anhydrite, then this calcium sulfate abrasion does not lead to caking on the production facilities. In this context, it is particularly expedient and advantageous if the coating composition has the following composition, regardless of the water added: at least 94% by weight calcium sulfate anhydrite, 0.01-0.8% by weight cellulose ether, 0.01- 1.0% by weight of condenser and a maximum of 0.2% of wetting agent.
Das organische Bindemittel, das im vorliegenden Fall in der Beschichtungsmasse vorgesehen ist, ist z.B. Polyacrylat oder Styrolacrylat. Organische Bindemittel verschlechtern in der Regel das Brandverhalten und erhöhen die Toxizität der entstehenden Rauchgase im Brandfall. Bei der erfindungsgemäßen Gipsbauplatte kann aber der Bindemittelanteil relativ gering gehalten werden. Besonders zweckmäßig und vorteilhaft ist es also, wenn das organische Bindemittel weniger als 6 Gew.% der trockenen Beschichtungsmasse ausmacht. Das nicht oder fast nicht abgebundene, jedoch noch reaktive Calciumsulfat der Beschichtungsmasse ermöglicht also eine Verringerung des Anteils an organischem Bindemittel.The organic binder which is provided in the coating composition in the present case is e.g. Polyacrylate or styrene acrylate. Organic binders generally worsen fire behavior and increase the toxicity of the smoke gases generated in the event of a fire. In the plasterboard according to the invention, however, the proportion of binder can be kept relatively low. It is therefore particularly expedient and advantageous if the organic binder makes up less than 6% by weight of the dry coating composition. The calcium sulfate of the coating composition, which has not or almost not set but is still reactive, thus makes it possible to reduce the proportion of organic binder.
In einer weiteren Ausführungsform wird der Beschichtungsmasse bis zu 40 Gew.% Aluminiumhydroxid oder Borsäure zugegeben. Auf diese Weise wird sichergestellt, daß die Gipsbauplatte die Kriterien an Baustoffklasse A1 nach DIN 4102 erfüllt.In a further embodiment, up to 40% by weight of aluminum hydroxide or boric acid is added to the coating composition. This ensures that the plasterboard meets the criteria for building material class A1 according to DIN 4102.
Besonders zweckmäßig und vorteilhaft ist es auch, wenn bei der erfindungsgemäßen Gipsbauplatte die Verhältnisse der mit der Calciumsulfat-Beschichtung versehenen Glasvlieslage derart eingestellt sind, daß die Beschichtungsmasse oberflächlich einen Abrieb von maximal 0,2 g hat. Dieser geringe Abrieb liegt vor, weil organisches Bindemittel, Vlies und Calciumsulfat einen optimalen Haftverbund bilden.It is also particularly expedient and advantageous if, in the gypsum building board according to the invention, the ratios of the glass fleece layer provided with the calcium sulfate coating are set such that the surface of the coating composition has an abrasion of at most 0.2 g. This low abrasion is due to the fact that organic binder, fleece and calcium sulfate form an optimal adhesive bond.
Die Ermittlung der Abriebfestigkeit erfolgt dabei in Anlehnung an DIN 53109, "Prüfung von Papier und Pappe: Bestimmung des Abriebs nach dem Reibradverfahren" und ISO 4586-2 "Abration resistance of decorative laminated sheets." Als Abriebgerät dient der Teldyne Taber Standard Abrasion Tester. Auf die Reibräder wird das standardisierte Schmirgelpapier S-33 aufgebracht. Jedes Reibrad wird mit einem Zusatzgewicht von 500 g belastet. Bei der Prüfung läßt man die Reibräder mit dem Schmirgelpapier S-33 10 Umdrehungen lang auf die Plattenoberfläche einwirken. Danach wird der Abrieb durch Bestimmung der Gewichtsdifferenz ermittelt.The abrasion resistance is determined in accordance with DIN 53109, "Testing paper and cardboard: determination of abrasion using the friction wheel method" and ISO 4586-2 "Abration resistance of decorative laminated sheets. "The Teldyne Taber Standard Abrasion Tester serves as the abrasion device. The standardized emery paper S-33 is applied to the friction wheels. Each friction wheel is loaded with an additional weight of 500 g. During the test, the abrasion wheels are left with the emery paper S-33 10 Rotate the plate surface for one revolution after which the abrasion is determined by determining the weight difference.
Ein weiterer Vorteil der erfindungsgemäßen Gipsbauplatte liegt auch darin, daß die Abhebefestigkeit nach weiterer Oberflächenbehandlung (Grundierung, Anstrich, Tapete oder Putz) erhöht ist. Erfindungsgemäße Platten einer Anfertigung haben nach der Herstellung eine mittlere Abhebefestigkeit von 0,34 N/mm², wobei der Mindestwert aus jeweils sechs Messungen quer über die Plattenbreite 0,23 N/mm² beträgt. Ein Teil der Platten wird mit einer wäßrigen Dispersionsgrundierung gestrichen, der andere Teil mit einem Dünnputz auf Gipsbasis überzogen. Die mittlere Abhebefestigkeit erreicht 0,42 N/mm² nach der Grundierung und 0,43 N/mm² nach dem Dünnputz-Auftrag: die Mindestwerte erhöhen sich auf 0,24 bzw. 0,28 N/mm².Another advantage of the plasterboard according to the invention is that the resistance to lifting off after further surface treatment (primer, paint, wallpaper or plaster) is increased. Plates according to the invention of a production have an average lifting strength of 0.34 N / mm² after production, the minimum value from six measurements across the plate width being 0.23 N / mm². Part of the boards is painted with an aqueous dispersion primer, the other part is coated with a thin plaster based on gypsum. The average lifting strength reaches 0.42 N / mm² after priming and 0.43 N / mm² after thin-plaster application: the minimum values increase to 0.24 and 0.28 N / mm².
Die Beschichtungsmasse auf der Basis von Calciumsulfat umfaßt beim Anmachen als anorganisches Bindemittel entweder nur Halbhydrat oder nur Anhydrit. Die Kernmasse ist so zusammengesetzt, wie es für Gipsbauplatten der hier zur Rede stehenden Art üblich ist und wie sie bei herkömmlichen Gipskartonplatten verwendet wird. Die erfindungsgemäße Gipsbauplatte wird auf üblichen Herstellungsanlagen für Gipskartonplatten hergestellt. Die Gipsbauplatte befindet sich nach ihrer Herstellung im unverarbeiteten Zustand, wenn sie gelagert und/oder transportiert und/oder mechanisch befestigt wird. Ein verarbeiteter Zustand liegt vor, wenn die Gipsbauplatte in ein Bauwerk eingebaut ist. Wenn die Beschichtungsmasse bei der eingebauten Gipsbauplatte mit Tapete, Fliesen oder Folien belegt wird, so nimmt sie Wasser auf und das Calciumsulfat kann teilweise rehydratisieren.The coating composition based on calcium sulfate comprises either only hemihydrate or only anhydrite as an inorganic binder. The core mass is composed as it is common for plasterboard of the type in question and as it is used in conventional plasterboard. The gypsum building board according to the invention is produced on conventional manufacturing plants for gypsum plasterboard. After its production, the plasterboard is in the unprocessed state when it is stored and / or transported and / or mechanically fastened. A processed state exists when the plasterboard is installed in a building. If the coating mass on the installed plasterboard is covered with wallpaper, tiles or foils, it absorbs water and the calcium sulfate can partially rehydrate.
In der Zeichnung ist eine bevorzugte Ausführungsform der Erfindung dargestellt und zeigt
- Fig.1
- eine Draufsicht mit Aufbrüchen auf ein Teil einer Gipsbauplatte mit beschichteter Glasvlieslage,
- Fig.2
- eine Seitenansicht der Gipsbauplatte gemäß Fig.1,
- Fig.3
- eine Fotografie eines Schnittes der Gipsbauplatte gemäß Fig.1 und
- Fig.4
- eine Fotografie eines Schnittes einer weiteren Gipsbauplatte.
- Fig. 1
- a plan view with cracks on part of a plasterboard with coated glass fleece layer,
- Fig. 2
- 2 shows a side view of the plasterboard according to FIG. 1,
- Fig. 3
- a photograph of a section of the plasterboard according to Fig.1 and
- Fig. 4
- a photograph of a section of another plasterboard.
Die Gipsbauplatte gemäß Fig.1 und 2 weist einen Plattenkern 1 auf, an dessen einer Flächenseite sich eine Glasvlieslage 2 anschließt, die nach außen hin mit einer Calciumsulfat-Beschichtung 3 versehen ist. Die Glasvlieslage 2 ist in zwei schichtartige Bereiche 4,5 unterteilt, wobei der eine Bereich 4 mit einer Beschichtungsmasse gefüllt ist, die auch die Beschichtung 3 bildet, und der andere Bereich 5 mit einer Kernmasse gefüllt ist, die auch den Plattenkern 1 bildet. Die Kernmasse und die Beschichtungsmasse berühren einander in der Glasvlieslage 2 entlang einer Trennfläche 6.The gypsum building board according to FIGS. 1 and 2 has a board core 1, on one surface side of which a
Die innige Berührung zwischen der Kernmasse und der Beschichtungsmasse läßt sich anhand rasterelektronenmikroskopischer Aufnahmen zeigen. Fig. 3 zeigt den perfekten Kontakt beider Schichten, die in die Glasvliesschicht eingedrungen sind. Bei der Fig. 4 zugrunde liegenden Platte ist dem Stuckgips vor dem Mischen Eisenoxid zugesetzt. Mit Hilfe der Elektronenstrahlmikrosonde wird festgestellt, wie weit die Kernmasse in das Glasvlies eingedrungen ist. Wie man aus den Spektren erkennen kann, ist die Kernmasse bis zu dem mit "2" bezeichneten Punkt eingedrungen. Die Stelle "1" zeigt keinen Eisen-Peak. Da derartige Analysen in der Praxis zu aufwendig sind, wird das Ausmaß der Berührung durch die Abhebefestigkeit beschrieben.The intimate contact between the core mass and the coating mass can be shown on the basis of scanning electron micrographs. Fig. 3 shows the perfect contact of both layers that have penetrated the glass fleece layer. In the plate on which FIG. 4 is based, iron oxide is added to the stucco before mixing. The electron beam microsensor is used to determine how far the core mass has penetrated the glass fleece. As can be seen from the spectra, the nuclear mass has penetrated to the point labeled "2". Position "1" shows no iron peak. Since such analyzes are too complex in practice, the extent of the contact is described by the lifting strength.
Die Calciumsulfat-Beschichtung 3 ist dünn wie ein Film und maximal 200 µm dick. Man kann die Struktur des Vlieses durch die Beschichtung 3 hindurch erkennen, da sich diese wie ein dünner Aufstrich auf dem Vlies darstellt.The
Claims (18)
bei der mindestens eine Seite eines Plattenkerns mit der Glasvlieslage belegt ist, deren dem Plattenkern abgewendete Seite mit einer Calciumsulfat-Beschichtung versehen ist,
bei der Kernmasse den Plattenkern bildet und einerseits in die Glasvlieslage eingedrungen ist und Beschichtungsmasse die Calciumsulfat-Beschichtung bildet und andererseits in die Glasvlieslage eingedrungen ist, bei der die Beschichtungsmasse auf der Basis eines Calciumsulfats gebildet ist und organisches Bindemittel enthält und
bei der die Kernmasse aus Calciumsulfat-Dihydrat gebildet ist,
wobei die Calciumsulfat-Beschichtung samt Glasvlieslage an dem Plattenkern an jeder Stelle über die Plattenebene hin mit einer rechtwinkelig zur Plattenebene gemessenen Abhebefestigkeit haftet, und
wobei die Gipsbauplatte sich in dem kurz nach der Fertigung vorliegenden Zustand befindet,
dadurch gekennzeichnet,
daß das Calciumsulfat der Beschichtungsmasse nicht oder fast nicht abgebunden ist und
daß die Kernmasse nahezu flächig durchgehend mit der Beschichtungsmasse in Berührung gebracht ist derart, daß die Abhebefestigkeit mindestens 0,15 N/mm² beträgt.Plasterboard with coated glass fleece layer,
in which at least one side of a plate core is covered with the glass fleece layer, the side of which facing away from the plate core is provided with a calcium sulfate coating,
forms the core of the plate and, on the one hand, has penetrated the nonwoven glass layer and coating compound has formed the calcium sulfate coating and, on the other hand, has penetrated the nonwoven glass layer, in which the coating compound has been formed on the basis of calcium sulfate and contains organic binder and
in which the core mass is formed from calcium sulfate dihydrate,
the calcium sulfate coating including the glass fleece layer adhering to the plate core at every point across the plate plane with a lifting strength measured at right angles to the plate plane, and
the plasterboard is in the state shortly after production,
characterized,
that the calcium sulfate of the coating composition is not or almost not set and
that the core mass is brought into almost continuous contact with the coating mass in such a way that the lifting strength is at least 0.15 N / mm².
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4432792 | 1994-09-15 | ||
| DE4432792 | 1994-09-15 | ||
| DE19527857A DE19527857C2 (en) | 1994-09-15 | 1995-07-29 | Gypsum building board with coated glass fleece layer |
| DE19527857 | 1995-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0702115A1 true EP0702115A1 (en) | 1996-03-20 |
| EP0702115B1 EP0702115B1 (en) | 2001-07-04 |
Family
ID=25940134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95114350A Expired - Lifetime EP0702115B1 (en) | 1994-09-15 | 1995-09-13 | Plasterboard with coated glass fiber mat |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0702115B1 (en) |
| AT (1) | ATE202821T1 (en) |
| DK (1) | DK0702115T3 (en) |
| ES (1) | ES2158923T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009033A1 (en) * | 1996-08-29 | 1998-03-05 | Bpb Plc | Building board |
| WO2000006849A1 (en) * | 1998-07-28 | 2000-02-10 | Bpb Plc | Building board and its production |
| WO2011095202A1 (en) * | 2010-02-02 | 2011-08-11 | Stauf Klebstoffwerk Gmbh | Aqueous dispersion base, coating produced therewith, and methods for producing a vapor barrier or an intermediate layer on a substrate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1033123B (en) * | 1954-06-23 | 1958-06-26 | Saint Gobain | Gypsum board and method and device for their production |
| AU5170773A (en) * | 1972-02-02 | 1974-08-01 | Commw Sceitnific And Ind Resea | Plaster sheet material |
| US3993822A (en) * | 1970-02-25 | 1976-11-23 | Gebr. Knauf Westdeutsche Gipswerke | Multi-layer plasterboard |
| GB2053779A (en) | 1979-05-30 | 1981-02-11 | Bpb Industries Ltd | Production of building board |
| DE3937433A1 (en) | 1989-11-10 | 1991-05-16 | Knauf Westdeutsche Gips | PLASTERBOARD PANEL WITH COATING FROM COATED FIBERGLASS Mats and METHOD FOR THE PRODUCTION THEREOF |
-
1995
- 1995-09-13 EP EP95114350A patent/EP0702115B1/en not_active Expired - Lifetime
- 1995-09-13 AT AT95114350T patent/ATE202821T1/en active
- 1995-09-13 DK DK95114350T patent/DK0702115T3/en active
- 1995-09-13 ES ES95114350T patent/ES2158923T3/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1033123B (en) * | 1954-06-23 | 1958-06-26 | Saint Gobain | Gypsum board and method and device for their production |
| US3993822A (en) * | 1970-02-25 | 1976-11-23 | Gebr. Knauf Westdeutsche Gipswerke | Multi-layer plasterboard |
| AU5170773A (en) * | 1972-02-02 | 1974-08-01 | Commw Sceitnific And Ind Resea | Plaster sheet material |
| GB2053779A (en) | 1979-05-30 | 1981-02-11 | Bpb Industries Ltd | Production of building board |
| DE3937433A1 (en) | 1989-11-10 | 1991-05-16 | Knauf Westdeutsche Gips | PLASTERBOARD PANEL WITH COATING FROM COATED FIBERGLASS Mats and METHOD FOR THE PRODUCTION THEREOF |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009033A1 (en) * | 1996-08-29 | 1998-03-05 | Bpb Plc | Building board |
| AU716032B2 (en) * | 1996-08-29 | 2000-02-17 | Bpb Plc | Building board |
| CN1103401C (en) * | 1996-08-29 | 2003-03-19 | Bpb公开有限公司 | Building board |
| WO2000006849A1 (en) * | 1998-07-28 | 2000-02-10 | Bpb Plc | Building board and its production |
| WO2011095202A1 (en) * | 2010-02-02 | 2011-08-11 | Stauf Klebstoffwerk Gmbh | Aqueous dispersion base, coating produced therewith, and methods for producing a vapor barrier or an intermediate layer on a substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| DK0702115T3 (en) | 2001-09-17 |
| ES2158923T3 (en) | 2001-09-16 |
| EP0702115B1 (en) | 2001-07-04 |
| ATE202821T1 (en) | 2001-07-15 |
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