Abstract: The invention relates to a plaster-based composition comprising nanometric boehmite and/or nanometric aluminium trihydroxide, this composition making it possible to obtain products having better dimensional stability at high and in particular at very high temperature. The invention also relates to the method of obtaining the products, and the products produced.

Abstract: A drier for drying boards (32) comprises at least one conduit (34, 40) for directing airflow towards one of the faces of the board (32). The drier is configured such that at least a portion of the airflow travels across the face of the board (32) along the longitudinal axis of the drier, the longitudinal axis of the drier being the axis along which the board (32) travels as it is dried.

Abstract: The present invention provides a gypsum composition, a gypsum board and their preparation method and the use of DHA as an anti-sagging additive in a gypsum product. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises gypsum, and an anti-deformation additive, wherein the anti-deformation additive comprises at least one selected from a group consisting of dehydroascorbic acid, dehydroascorbate and semidehydroascorbic acid. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum product of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum product to meet the demands of the customer.

Abstract: An expansion anchor includes a screw and an anchor body configured to receive a shank of the screw, the anchor body including: a flange configured to be directed towards the screw head; a nut-forming portion configured to cooperate with the screw thread; and a deformable expansion portion between the flange and the nut-forming portion. The nut-forming portion is configured to advance in the direction of the flange, by deforming the expansion portion to a deployed state, by screwing the screw in the nut-forming portion. When the anchor is mounted inside a hole in a wall, with the flange bearing against a first face of the wall, the expansion portion in the deployed state forms a continuous contact surface facing a second face of the wall and has a load-bearing section, transversely with respect to the screw axis, which is generally decreasing from the contact surface towards the nut-forming portion.

Abstract: This disclosure relates to using polyester films on building boards to enable improved surface coatings. The polyester film is preferably applied to a glass mat via an adhesive to form a laminate. This laminate is then bonded to the exterior surface of a gypsum board. The polyester film is advantageous because it allows for exterior surface coatings to be applied. In one embodiment, an exterior acrylic coating is applied to the polyester film. Boards constructed in accordance with this disclosure allow for exterior finishings to be achieved without the need for excessive finishing materials or steps.

Abstract: A self-drilling anchor including a screw and an anchor body configured to receive a shank of the screw, the anchor body including: a flange at an end oriented toward a head of the screw, a threaded portion, a deformable expansion portion between the flange and the threaded portion, and a rotation locking mechanism preventing rotation of the anchor body relative to the wall. The threaded portion is configured to engage with the screw thread and advance in a direction of the flange, by deforming the expansion portion, when the screw is screwed into the threaded portion. The anchor body further includes a piercing element at the opposite end from the flange, the anchor including a fastening mechanism between the screw and the anchor body, the fastening mechanism being detachable by a torque, applied between the screw and the anchor body, equal to or greater than a predetermined torque.

Abstract: The invention relates to a mineral composition for the preparation of foundry moulds, comprising: (a) from 20% to 90% by weight of plaster, (b) from 10% to 80% by weight of a mineral component based on silica and/or alumina, and (c) from 0.5% to 4.8%, preferably from 1.5% to 4.5% and in particular between 2% and 4.5% by weight, of a mineral powder having a thermal conductivity (X), at 20° C., of greater than 15 W/(m.K) and a specific surface area of greater than 10 m2/g, these percentages being relative to the total weight of the sum of the components (a), (b) and (c).

Abstract: Disclosed is a building board construction with increased surface strength. More specifically, increased nail pull strength is achieved via the application of an external surface coating. The surface coating is ideally applied to a paper faced gypsum building board. In one possible embodiment, the coating is formed from a water soluble polymer.

Abstract: Disclosed is a building board construction with increased surface strength. More specifically, increased nail pull strength is achieved via the application of an external surface coating. The surface coating is ideally applied to a paper faced gypsum building board. In one possible embodiment, the coating is formed from a water soluble polymer.

Abstract: A building product comprises calcium sulphate dihydrate particles bound by an organic binder. The calcium sulphate dihydrate particles each have a longest dimension and a lateral dimension, wherein the lateral dimension corresponds to the maximum breadth of the particle about the axis defined by the longest dimension. The calcium sulphate dihydrate particles have a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension.

Abstract: A luminous panel includes at least two juxtaposed OLED devices that form a front face of the luminous panel and define two light-emitting zones separated by an intermediate zone, and a luminous joint forming mechanism that ensures, when the two OLED devices are in an on state, visual continuity between the intermediate zone and the two emitting zones, the luminous joint forming mechanism being located at a back of or flush with the front face of the panel.

Abstract: The present invention provides a gypsum composition, a gypsum board and their preparation method and the use of DHA as an anti-sagging additive in a gypsum product. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises gypsum, and an anti-deformation additive, wherein the anti-deformation additive comprises at least one selected from a group consisting of dehydroascorbic acid, dehydroascorbate and semidehydroascorbic acid. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum product of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum product to meet the demands of the customer.

Abstract: The present invention provides a composition, a gypsum board and their preparation method and the use of ascorbic acid as an anti-sagging additive in a gypsum board. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises hemi-hydrate gypsum, water and a compound comprising group and no carboxylate groups. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum board of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum board to meet the demands of the customer.

Abstract: A pressing assembly (10) and a method for forming a depression (105) within a moving, wet gypsum board (100) is disclosed. The assembly comprises a pressing head (16) comprising a pressing surface which is arranged to contact the board, and a support member (17), the pressing head (16) being arranged to compress a portion of the board between the pressing surface and the support member (17) to form a depression (105) within the board (10). The pressing surface comprises a first and second surface portion (24, 25) separated by a relief portion (27), which is arranged to press the board (100) toward the support head (17) with less compressive force than the first and second surface portion (24, 25).

Abstract: The invention relates to an illuminating web, characterized in that it is flame-retarded by a flame-retardant composition impregnated into the bulk of the illuminating web and/or included in a coating on at least one face of the illuminating web. The illuminating web exhibits an improved performance in terms of reaction toward fire. It is better suited to the standards in force as regards reaction to fire. It also exhibits an advantageous illuminating performance and has good acoustic properties, when it incorporates a support appropriate for sound insulation. The invention also relates to an illuminating structure composed of said web added to a rigid or semirigid support. This structure can be used in particular as partition wall or ceiling in a building. With regard to the web proper, it can be used as painter's canvas or stretched fabric or part of these.

Abstract: A panel for use in building construction comprises a substrate board having two opposed faces. A lamina is secured to a first one of the faces of the substrate board by means of one or more regions of bonding between the lamina and the board. The one or more regions of bonding cover a total area that is less than 20% of the total interfacial area between the lamina and the board.

Abstract: A method and system for producing a gypsum product comprising a mixer for mixing gypsum and water and two foam feeds into the system wherein the foam feeds each comprise foam of different bubble size distributions.

Abstract: An actuator for controlling the operation of an apparatus comprises a panel (16) and an acoustic sensor (26). The panel provides a partition within a building structure, while the acoustic sensor is adapted to detect acoustic waves propagating through the panel. When a user exerts pressure against the panel, the sensor detects the acoustic waves that are formed and emits signals for controlling the operation of an apparatus, such as a doorbell, a light source, a television, a sound system, a ventilation system, a window blind, a radio or an alarm.

Abstract: The invention provides a calcium sulphate-based product comprising a phosphate as additive for increased fire resistance. Particularly preferred phosphate additives may be those containing aluminium or ammonium ions.