Saint-gobain Placo S.a.s.

Certainteed Gypsum, Inc.

Certainteed Corporation

Georgia-pacific Gypsum, Inc.

Bryan Wiltzius

Gerald Boydston

Choung-Houng Lai

Michael J Lemberger

Nathan Frailey

Mithun N Kamath

Eric Dong

Robert J Hauber

Stuart Brandon Gilley

Michael P Fahey

John Bridenstine

Yongan Yuan

Nathan Gregory Frailey

An example plasterboard includes a layer of hardened plaster material having a first surface and an opposed second surface and a layer of molded material having a surface that faces away from the layer of hardened plaster material. The surface of the layer of molded material has one or more raised features. The plasterboard also includes a liner between the first surface of the layer of hardened plaster material and the layer of molded material. Other examples include a method of forming such plasterboards and a method for installing such plasterboards.

Plasterboards and methods for making them

An example plasterboard includes a layer of hardened plaster having a first surface and an opposed second surface, a layer of polymer material having particles of one or more cementitiously-active substances mixed therein, and a liner between the first surface of the layer of hardened plaster and the layer of polymer material. Another example is a method of forming such a plasterboard. The method includes loading an extruder with the polymer material having the particles of one or more cementitiously active substances mixed therein, extruding the polymer material through a die to form the layer of polymer material on a surface of the liner, contacting with a layer of wet plaster material, the liner having the polymer material applied thereon such that the surface of the liner faces away from the wet plaster material, and drying the layer of wet plaster material to form the layer of hardened plaster.

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.

Polyester laminated building boards with improved surface characteristics

Gypsum panels and methods of making the same are provided. A gypsum panel includes a gypsum core containing set gypsum and unexpanded perlite ore, wherein the unexpanded perlite ore is present in the gypsum core in an amount greater than any other component, other than the gypsum.

Gypsum panels, systems, and methods

A building board including a cementitious layer between two fiber mats. At least one fiber mat forms with a polymer film a fiber mat/polymer film laminate. The cementitious layer of the building board contains a reactive water-insoluble polymer which improves binding of the fiber mat/polymer film laminate to the cementitious layer. The building board has a low water absorption and a high level surface finish.

Building board and method of forming the building board

A method for producing building boards includes unwinding a facing sheet from a supply roll of facing sheet over top of a forming table that includes a series of nozzles. A volume of cementitious material is deposited from a slurry mixing device to the unwound facing sheet. Pressurized air is supplied from an air source to the series of nozzles, whereby a cushion of air is created between the unwound facing sheet and the forming table.

Growing community of inventors

Largo, FL, United States of America

Bryan Wiltzius