Abstract: The invention concerns an apparatus for furnishing a liner with a layer of stucco slurry, comprising at least: a conveying device (24) for conveying a liner (7), said conveyor device defining a transport direction (31); a stucco slurry feeder device (26) for casting stucco slurry onto the liner (7); a stucco slurry distribution device (27) for distributing stucco slurry cast onto the liner (7); and at least one stripper device (28) for stripping stucco slurry from lateral portions of the liner. The invention further concerns a method for furnishing a liner with a layer of stucco slurry of defined width and a method for producing a gypsum plasterboard.

Abstract: An apparatus for producing a cementitious board includes a conveying device for conveying a first liner with first overlap sections-in a transport direction, at least one slurry feeder device for applying at least one layer of at least one slurry comprising a cementitious material onto the first liner, a liner feeding device for providing and arranging a second liner with second overlap sections such that it contacts the first overlap sections of the first liner wherein the at least one layer of the at least one slurry is arranged between the first liner and the second liner, an adhesive foam feeder for providing an adhesive foam on at least one of the first or the second overlap sections, and a means for bonding the first liner and the second liner.

Abstract: Method for producing a cementitious board (1), wherein a first liner (2) with first overlap sections (5) is provided and furnished with at least one layer of at least one slurry comprising a cementitious material (3); a second liner (4) with second overlap sections (8) is provided and arranged such that it contacts the first overlap sections (5) of the first liner (2), wherein the at least one layer of the at least one slurry (3) is arranged between the first liner (2) and the second liner (4); an adhesive foam (6) is provided at least partly on at least one of the first or second overlap sections (5, 8); and the first liner (2) and the second liner (4) are bonded via the adhesive foam (6) in the overlap sections (5, 8).

Abstract: The present invention is concerned with plasterboards including at least two layers A and B of different composition, wherein layer A includes a calcium sulfate binder and a synthetic polymer foam and the layer B includes a calcium sulfate binder and a surfactant foam and wherein the at least one layer A is a surface layer. Improved nail pull resistance can be achieved in lightweight plasterboards, if foamed synthetic polymer is present in a surface layer. The present invention further concerns a method for the production of corresponding products, an apparatus for the production of such products as well as the use of synthetic polymer foam in a surface layer to produce plasterboards with high nail pull resistance at a minimal amount of synthetic polymer.

Abstract: Method for producing a cementitious board (1), wherein a first liner (2) with first overlap sections (5) is provided and furnished with at least one layer of at least one slurry comprising a cementitious material (3); a second liner (4) with second overlap sections (8) is provided and arranged such that it contacts the first overlap sections (5) of the first liner (2), wherein the at least one layer of the at least one slurry (3) is arranged between the first liner (2) and the second liner (4); an adhesive foam (6) is provided at least partly on at least one of the first or second overlap sections (5, 8); and the first liner (2) and the second liner (4) are bonded via the adhesive foam (6) in the overlap sections (5, 8).

Abstract: The invention concerns a method for producing gypsum boards, wherein a liquefier for the gypsum slurry is foamed with gas to provide a foam having a water content of less than 85 wt.-%, then incorporated into a gypsum/water mixture and the mixture thus obtained is applied on a two dimensional substrate. The incorporation of the liquefier in foamed form allows for a significant reduction of the amount of liquefier required to provide a desired flowability of the gypsum/water mixture, thus allowing the production of gypsum boards with similar characteristics with less liquefier. The invention further concerns gypsum board prepared using this process, apparatuses for producing gypsum boards using this process and the use of a corresponding liquefier foam to minimize the amount of liquefier required to establish a desired flowability of a gypsum/water mixture.

Abstract: A gypsum building material, characterised in that the gypsum building material comprises at least gypsum, H-siloxane and/or amorphous silicon dioxide and optionally further additives, wherein the H-siloxane is uniformly distributed in the gypsum building material and/or is applied to at least one surface of the gypsum building material, characterised in that the gypsum building material under the effect of temperatures of at least 80° C. has a longer expansion phase than a gypsum building material without H-siloxane and/or amorphous silicon dioxide, wherein the gypsum building material is otherwise of identical composition.

Abstract: The invention concerns an apparatus for furnishing a liner with a layer of stucco slurry, comprising at least: a conveying device (24) for conveying a liner (7), said conveyor device defining a transport direction (31); a stucco slurry feeder device (26) for casting stucco slurry onto the liner (7); a stucco slurry distribution device (27) for distributing stucco slurry cast onto the liner (7); and at least one stripper device (28) for stripping stucco slurry from lateral portions of the liner. The invention further concerns a method for furnishing a liner with a layer of stucco slurry of defined width and a method for producing a gypsum plasterboard.

Abstract: The invention relates to a conveyor line (1) for the continuous production of drywall boards as well as a slurry distributing device (22) which is used in this conveyor line (1). The distributing device is used for the uniform and low-speed flow distribution of slurries (20).

Abstract: The invention relates to a conveyor line (1) for the continuous production of drywall boards as well as a slurry distributing device (22) which is used in this conveyor line (1). The distributing device is used for the uniform and low-speed flow distribution of slurries (20).

Abstract: The invention pertains to a method for stabilizing stucco wherein a fresh stucco is provided; water is added to the fresh stucco to obtain moistened stucco, and the moistened stucco is maintained at a temperature of at least 30° C. for a time interval of at least 30 minutes to obtain a stabilized stucco. The process allows inter alia for an easy adjustment of the activity of the stabilized stucco, which is useful to e.g. adjust setting time of a corresponding stucco slurry. The invention further pertains to a method for producing gypsum plasterboards, wherein a stabilized stucco obtained with the above method is used.

Abstract: The invention relates to a conveyor line (1) for the continuous production of drywall boards as well as a slurry distributing device (22) which is used in this conveyor line (1). The distributing device is used for the uniform and low-speed flow distribution of slurries (20).