EP0702115A1 - Plaque de plâtre avec feuille en fibre de verre revêtu - Google Patents

Plaque de plâtre avec feuille en fibre de verre revêtu Download PDF

Info

Publication number: EP0702115A1
Authority: EP; European Patent Office
Prior art keywords: coating; calcium sulfate; plasterboard; weight; coating composition
Prior art date: 1994-09-15
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP95114350A

Other languages

German (de)

English (en)

Other versions

EP0702115B1 (fr

Inventor

Jürgen MARTIN

Lothar Dr. Dipl. Chem. Scheller

Gerhard Dr. Dipl. Chem. Neuhauser

Hans-Ulrich Dr. Dipl.Chem. Hummel

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Knauf Gips KG

Original Assignee

Gebr Knauf Westdeutsche Gipswerke

Priority date (The priority date 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 date listed.)

1994-09-15

Filing date

1995-09-13

Publication date

1996-03-20

1995-07-29 Priority claimed from DE19527857A external-priority patent/DE19527857C2/de

1995-09-13 Application filed by Gebr Knauf Westdeutsche Gipswerke filed Critical Gebr Knauf Westdeutsche Gipswerke

1996-03-20 Publication of EP0702115A1 publication Critical patent/EP0702115A1/fr

2001-07-04 Application granted granted Critical

2001-07-04 Publication of EP0702115B1 publication Critical patent/EP0702115B1/fr

2015-09-13 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- 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.

Landscapes

Engineering & Computer Science (AREA)
Architecture (AREA)
Civil Engineering (AREA)
Structural Engineering (AREA)
Laminated Bodies (AREA)
Force Measurement Appropriate To Specific Purposes (AREA)
Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Lining And Supports For Tunnels (AREA)
Finishing Walls (AREA)
Building Environments (AREA)

EP95114350A 1994-09-15 1995-09-13 Plaque de plâtre avec feuille en fibre de verre revêtu Expired - Lifetime EP0702115B1 (fr)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
DE4432792		1994-09-15
DE4432792		1994-09-15
DE19527857A DE19527857C2 (de)	1994-09-15	1995-07-29	Gipsbauplatte mit beschichteter Glasvlieslage
DE19527857		1995-07-29

Publications (2)

Publication Number	Publication Date
EP0702115A1 true EP0702115A1 (fr)	1996-03-20
EP0702115B1 EP0702115B1 (fr)	2001-07-04

Family

ID=25940134

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95114350A Expired - Lifetime EP0702115B1 (fr)	1994-09-15	1995-09-13	Plaque de plâtre avec feuille en fibre de verre revêtu

Country Status (4)

Country	Link
EP (1)	EP0702115B1 (fr)
AT (1)	ATE202821T1 (fr)
DK (1)	DK0702115T3 (fr)
ES (1)	ES2158923T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1998009033A1 (fr) *	1996-08-29	1998-03-05	Bpb Plc	Plaque de construction
WO2000006849A1 (fr) *	1998-07-28	2000-02-10	Bpb Plc	Fabrication de panneau de construction
WO2011095202A1 (fr) *	2010-02-02	2011-08-11	Stauf Klebstoffwerk Gmbh	Couche de fond en dispersion aqueuse, revêtement fabriqué à partir de cette dernière, ainsi que procédé de fabrication d'une barrière contre la vapeur d'eau ou d'une couche intermédiaire sur un subjectile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1033123B (de) *	1954-06-23	1958-06-26	Saint Gobain	Gipsplatte sowie Verfahren und Vorrichtung zu deren Herstellung
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 (de)	1989-11-10	1991-05-16	Knauf Westdeutsche Gips	Gipsbauplatte mit kaschierungen aus beschichteten glasfaservliesen und verfahren zur herstellung derselben

1995
- 1995-09-13 ES ES95114350T patent/ES2158923T3/es not_active Expired - Lifetime
- 1995-09-13 EP EP95114350A patent/EP0702115B1/fr not_active Expired - Lifetime
- 1995-09-13 DK DK95114350T patent/DK0702115T3/da active
- 1995-09-13 AT AT95114350T patent/ATE202821T1/de active

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1033123B (de) *	1954-06-23	1958-06-26	Saint Gobain	Gipsplatte sowie Verfahren und Vorrichtung zu deren Herstellung
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 (de)	1989-11-10	1991-05-16	Knauf Westdeutsche Gips	Gipsbauplatte mit kaschierungen aus beschichteten glasfaservliesen und verfahren zur herstellung derselben

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1998009033A1 (fr) *	1996-08-29	1998-03-05	Bpb Plc	Plaque de construction
AU716032B2 (en) *	1996-08-29	2000-02-17	Bpb Plc	Building board
CN1103401C (zh) *	1996-08-29	2003-03-19	Bpb公开有限公司	建筑板
WO2000006849A1 (fr) *	1998-07-28	2000-02-10	Bpb Plc	Fabrication de panneau de construction
WO2011095202A1 (fr) *	2010-02-02	2011-08-11	Stauf Klebstoffwerk Gmbh	Couche de fond en dispersion aqueuse, revêtement fabriqué à partir de cette dernière, ainsi que procédé de fabrication d'une barrière contre la vapeur d'eau ou d'une couche intermédiaire sur un subjectile

Also Published As

Publication number	Publication date
DK0702115T3 (da)	2001-09-17
EP0702115B1 (fr)	2001-07-04
ATE202821T1 (de)	2001-07-15
ES2158923T3 (es)	2001-09-16

Publication	Publication Date	Title
DE3686583T2 (de)	1993-01-21	Mehrschichtiges holzprodukt.
DE69917719T2 (de)	2005-06-23	Verfahren zum Herstellen einer Gipsfaserplatte mit verbesserter Schlagfestigkeit
DE3248663C1 (de)	1984-06-07	Beschichtete Fassaden- oder Dachdaemmplatte aus Mineralfasern,sowie Verfahren zu ihrer Herstellung
DE69716748T2 (de)	2003-07-03	Bauplatte
WO1985004199A1 (fr)	1985-09-26	Materiau de couche de revetement a base de tissu ou de non-tisse
EP0258734A2 (fr)	1988-03-09	Panneau de construction stratifié et procédé pour sa fabrication
EP0062731A1 (fr)	1982-10-20	Plaque de construction en plâtre et procédé pour sa fabrication
DE2613976C3 (de)	1994-04-07	Mehrschichtige Platte und Verfahren zur Herstellung derselben
DE4110454C2 (de)	1998-05-20	Wärmedämmsystem mit Platten und Verfahren zur Oberflächenbehandlung dieser Platten
DE19804325C2 (de)	2000-02-10	Monolithische Bauplatte auf Zementbasis und Verfahren zu ihrer Herstellung
DE69231156T2 (de)	2001-02-15	Anorganische bauplatte und herstellungsverfahren
EP0702115B1 (fr)	2001-07-04	Plaque de plâtre avec feuille en fibre de verre revêtu
DE19527857C2 (de)	1996-10-10	Gipsbauplatte mit beschichteter Glasvlieslage
DE2806923A1 (de)	1978-08-24	Mit staerke beschichtetes papier, verfahren zu seiner herstellung und seine verwendung zur herstellung von gips-wandplatten sowie die dabei erhaltenen produkte
DE3608581C2 (fr)	1992-01-23
DE19527858C2 (de)	1998-03-26	Verfahren zur Herstellung einer mit beschichtetem Glasvlies kaschierten Gipsbauplatte
DE2336400A1 (de)	1974-02-14	Platte
DE19527227C1 (de)	1996-10-02	Bauplatte mit hoher Feuerresistenz, Verfahren zu ihrer Herstellung und ihre Verwendung
DE3147174A1 (de)	1983-06-01	"schallschluckende wandverkleidung bzw. wandverkleidungselement"
EP0702116B1 (fr)	2002-01-09	Méthode de production d'une plaque de plâtre recouvert d'une feuille en fibre de verre revêtu
DE3014155A1 (de)	1980-11-06	Fugenzement
DE1283726B (de)	1968-11-21	Zementmoertel mit Zuschlagstoffen, insbesondere zum Nivellieren und Glaetten von Wand-, Decken- und Bodenflaechen
DE2453383A1 (de)	1975-05-22	Glasfaserverstaerkte verbundgipsplatte
DE2558315A1 (de)	1976-07-29	Platte, insbesondere im bauwesen verwendbare platte und verfahren fuer deren herstellung
EP4090507B1 (fr)	2024-07-10	Panneau osb pourvu d'une couche de recouvrement en matériau à base de feuilles de typha

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