Abstract:
A moisture-tolerant structural panel comprising a gypsum board comprising a set gypsum core sandwiched between and faced with mats of glass fibers, wherein a free surface of one of said mats is coated with a combination of a mineral pigment, an inorganic adhesive binder and a polymer latex adhesive binder applied to said surface as an aqueous coating composition, said aqueous coating composition upon drying and setting, covering said mat to the extent that substantially none of the fibers of said mat protrude from said coating.
Abstract:
There is provided a facing sheet for cement boards comprising a scrim and polymer film. The scrim has a plurality of intersecting yarns defining an open mesh pattern with an inner face defining a grid profile for mechanical interaction with the cementitious composition of the cement board. The polymer film is joined to an outer face of the scrim and defines a repeating pattern of openings. The polymer film facilitates the mechanical interaction between the grid profile of the scrim and the cementitious composition and allows the passage of moisture from the cementitious composition during hardening of the cement board. The scrim may include glass fibers yarns and the polymer film may be formed by a gravure rolling process. A cement board may include a second facing sheet on a surface opposite the first facing sheet.
Abstract:
This invention provides facing materials for cementitious boards such as those including Portland cement or gypsum cores. The preferred facing material includes, in a first embodiment, a facing layer having an areal weight of about 300 grams/M2, and an air permeability rating of no greater than about 300 CFM/ft2 (FG 436-910 test method). The facing layer reduces the penetration of a slurry of cementitious material during the manufacture of a cementitious board, while permitting the water vapor from the slurry to pass therethrough. The facing materials of this invention can be designed to substantially eliminate the fouling of rolls used in continuous processing of such boards without the use, or with greatly reduced use, of costly viscosity control agents in the slurry. In addition, further embodiments of this invention can include binders, coatings or saturants which are designed to decrease pore size, increase or decrease the contact angle of liquids, or promote greater adhesion to cementitious cores, greater adhesion to other layers in the facing material, or greater adhesion or affinity to various types of adhesive compositions used to join cementitious boards to insulation and exterior finishing systems (EIS or EIFS).
Abstract:
A new method of applying fire protection coating to structures results in a new type of fire protection coating 10. Insulation layer 20, preferably a vermiculite/gypsum mixture 26, is applied such as by spraying a water slurry of the mineral particles to structural member 85. Before the free moisture can evaporate, diffusion barrier 40, such as epoxy intumescent coating 44, is applied over the moist vermiculite/gypsum mixture 26. Moisture is retained within vermiculite/gypsum mixture 26 indefinitely and is released in the event of a fire to help cool and prolong the efficacy of intumescent coating 44.
Abstract:
A structural reinforcing layer made from wire, a structural reinforcing composite layer made from wire, and the resulting load bearing structures made from or retrofitted with wire reinforced plastics and cements. Said layers and structures made from monofilament metallic or pre-cured composite materials twisted into multi-strand wire geometry optimized to mechanically shear load into rigid thermoplastic, thermoset, metallic or cementious resin systems. Wire geometry, count, size and strength/stiffness can be varied in combination with resin type, sheet structure, permeability and orientation to create layers intended for use in composite and cement based structures as originally molded reinforcement or retrofitted structural upgrades.
Abstract:
A composite board for use as backerboard for tile, the board including a mesh layer with a mesh fabric, a mat layer with a mat fabric and a polystyrene layer disposed between the two portions where a non-shrinking cement compound saturates and connects the two outer portions with the polystyrene substrate. The composite board's mesh layer incorporates a stretchable mesh which in conjunction with the polystyrene substrate and the non-shrinking cement compound supports standard fasteners used in the home-building industry along with providing a suitable tile adhesion surface. The mat layer incorporates a fiberglass mat which provides high rigidity as well as being suitable for contact with an inner wall or studs. The combination of materials provides a backerboard that is light weight, rigid, economical and easy to build with.
Abstract:
A gypsum board comprises a set gypsum layer having a first face and a second face. A fibrous mat is affixed to at least one of the faces. The mat comprises a non-woven web bonded together with a resinous binder. The web comprises a blend of a major portion composed of chopped continuous glass fibers having an average fiber diameter ranging from about 8 to 17 nullm and a minor portion composed of fine staple fibers having an average fiber diameter of less than about 5.5 nullm, the minor portion comprising about 1-30 percent of the dry weight of the web. The board is exceedingly durable. It has a smooth surface that is readily finished in an aesthetically pleasing way, using paint or other wall covering systems.
Abstract:
A gypsum board comprises a set gypsum layer having a first face and a second face. A fibrous mat is affixed to at least one of the faces. The mat comprises a non-woven web bonded together with a resinous binder. The web is composed of chopped continuous glass fibers having an average fiber diameter ranging from about 9.5 to 12.5 nullm. The board is exceedingly durable. It has a smooth surface that is readily finished in an aesthetically pleasing way, using paint or other wall covering systems.
Abstract:
A novel gypsum wallboard having a textile reinforcing material embedded within a gypsum core together with randomly oriented chopped glass fibers, as well as a novel process for constructing such gypsum wallboards.
Abstract:
The present invention relates to a fungus resistant gypsum board, made of first and second polymeric fibrous sheets with a gypsum core sandwiched there between. The gypsum core containing less than 0.03% of formulation additives that serve as fungus nutrients and less than 0.5% of the dry gypsum core contains of fungus nutrients. The fibrous sheets are preferably nonwovens and the gypsum core preferably contains a fungicide. The invention is also directed to a process for making a fungus resistant gypsum board.