Abstract:
Disclosed are product (e.g., panels), slurry, and methods relating to a pregelatinized starch having a mid-range viscosity (i.e., from about 20 centipoise to about 700 centipoise), and an extruded pregelatinized starch.
Abstract:
A drying type joint compound composition is provided, including: at least one binder, a filler and water, the water having a weight percentage in the range of 12-18% of the total weight of the composition.
Abstract:
A multi-leg discharge boot can include an inlet conduit and first and second outlet conduits separated by a junction portion. The inlet conduit includes an entry segment, a transition segment and a heel portion disposed therebetween. The inlet conduit can include an inlet end and a junction end. A junction portion is disposed at the junction end of the inlet conduit between first and second junction openings. The junction portion includes a substantially planar wall region that is substantially perpendicular to a main flow discharge axis.
Abstract:
A reduced weight, reduced density gypsum panel that includes high expansion vermiculite with fire resistance capabilities that are at least comparable to (if not better than) commercial fire rated gypsum panels with a much greater gypsum content, weight and density.
Abstract:
An apparatus for calcining gypsum includes a housing, at least one burner assembly, and at least one baffle. The housing has opposite first and second lateral walls, an inlet, and an outlet. The at least one burner assembly is connected to the housing, and can include a burner, a fluidization plenum, and a serpentine burner conduit. The serpentine burner conduit at least partly extends through the housing and to the fluidization plenum. The at least one baffle is disposed in the housing and attached to one of the first and second lateral walls. The baffle extends at least partly across the housing toward the other of the first and second lateral walls to define a flow path for the gypsum. The flow path extends from the inlet, around the baffle, and to the outlet.
Abstract:
A building construction composition, including wall and ceiling textures, joint compounds and coatings, the building construction composition comprising hydrated gypsum, anhydrous gypsum and/or calcium carbonate, a starch and/or polymeric binder and a formaldehyde-free antibacterial agent which contains one or more of the following compounds: copper (II) sulfate pentahydrate, copper sulfate, copper hydroxide, copper oxychloride, or any combination thereof; and methods for preventing microbial growth during manufacturing, storage and usage of the building construction compositions.
Abstract:
A gypsum stud is provided, including a gypsum wallboard panel having first and second facing sheets sandwiching a core therebetween, a series of cuts formed on at least one of the first and second facing sheets and extending into the core, retaining intact an opposing one of said first and second facing sheets to form a hinge point, the panel being rolled from a first side to a second side into a rolled condition so that a rolled up stud is formed.
Abstract:
A staggered stud wall system includes a top track having a main top web and depending inner and outer flanges, a bottom track having a main bottom web and vertically projecting inner and outer flanges, a first plurality of studs having a main stud web and at least one stud flange secured to inner top and bottom track flanges, a second plurality of studs having a main stud web and at least one stud flange secured to the outer top and bottom track flanges, the main top web and the main bottom web having a width greater than a width of the main stud web of the first and second plurality of studs, and stud bracing being installed to prevent movement of inner edges of the first and second plurality of studs relative to the top track and the bottom track.
Abstract:
A method and apparatus to manufacture gypsum board that directs an aqueous gypsum slurry to a second cover sheet, and passes the second cover sheet over a roller spaced above a first cover sheet so that a majority of the aqueous gypsum slurry of falls off the second cover sheet to deposit over the first cover sheet. Another aqueous gypsum slurry of a different density than the deposited slurry is applied over the first cover sheet before and/or after the deposited slurry. A gypsum board having layers of different densities is made by the method and apparatus.
Abstract:
Disclosed is a foam modifier, e.g., useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C6-C16 fatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.