Usg Interiors, Inc.

United States Gypsum Company

Qing Claire Yu

Mark H Englert

Bangji Cao

Martin W Brown

Gregory O Palm

Martin Brown

Weixin David Song

Wenqi Luan

Scott A Bogen

Carlos Figi

Donald Mueller

Donald S Mueller

Gregory Palm

A method of preparing a fibrous panel including surface treating a mineral wool with a water repellent agent to provide a water-repellent surface treated mineral wool, admixing the water-repellent surface-treated mineral wool with water to provide a slurry, and dewatering and drying the slurry to provide a fibrous panel. A method of preparing a mineral wool having a surface treated with a water repellent agent including contacting a water repellent agent emulsion with a mineral wool and drying the mineral wool, and a method of preparing a water-repellent surface-treated fibrous panel including mineral wool having a surface pre-treated with a water repellent agent are also provided.

Wool surface treated with hydrophobic agent and acoustic panels made therefrom

An acoustical ceiling panel comprising a flat core and an acoustically transparent face sheet adhesively attached to one of two oppositely facing major sides of the core, the core comprising a multitude of layers of corrugated fiberboard laminated together, the corrugated fiberboard layers each having a corrugated medium adhesively attached to a flat liner board, the corrugated medium forming regularly spaced flutes of curvilinear cross-section, the flutes of the layers of fiberboard being arranged in parallel directions extending perpendicularly to the major faces of the core.

Ceiling panels made from corrugated cardboard

A water felted base mat for a suspended ceiling tile comprising on a weight basis about &#xbd; mineral wool, starch binder, limited to about &#x215b;, newsprint, limited to about &#x215b;, and about &#xbc; expanded glass beads.

Ceiling tile base mat

An acoustical panel construction useful as a suspended ceiling tile having a rectangular shape bounded by edges and establishing a face area comprising at least one corrugated layer or layers of a total thickness, the layer or layers having a multitude of parallel flutes extending across an expanse of the rectangular shape substantially from one edge of the panel to an opposite edge, the flutes being formed by walls of the layer or layers and being of known volume, a series of apertures each of known area through the wall or walls of the flutes communicating with the atmosphere at the face, the aperture area, flute cavity volume associated with an aperture, and the total thickness of the corrugated layers associated with an aperture being arranged to produce a maximum absorption frequency between 200 and 2,000 Hz.

Corrugated acoustical panel

A cast type ceiling tile comprising a mixture containing 30 to 70% mineral wool, 10 to 40% expanded glass beads, 8 to 20% starch, 0 to 15% stucco, and 0 to 1% boric acid.

Cast ceiling tile

A non-woven material, that can be formed into an acoustic ceiling tile, is provided. The material includes a substantially planar and self-supporting core of an inorganic base fiber and a synthetic thermal bonding fiber. The synthetic thermal bonding fiber preferably has an increased bonding surface area that improves adhesion and porosity to provide a base mat or core with a low density to provide sound absorption required by an acoustic ceiling tile.

Low density non-woven material useful with acoustic ceiling tile products

A process useful for producing low density high mineral wool based acoustical panels with improved acoustical absorption properties using a water felting process is disclosed. The process includes forming a dilute slurry mixture including water, mineral wool, a thermoplastic binder and/or starch; and distributing the dilute slurry on a porous carrier to have the slurry dewatered to a base mat by gravity drainage to remove water by gravity. A vacuum is adjusted to gradually apply vacuum to the gravity dewatered base mat to further dewater the base mat without subjecting the mat to static pressure that would compress the base mat. The base mat is dried to form an acoustical ceiling product that has a low density and excellent acoustical absorption properties.

Growing community of inventors

Libertyville, IL, United States of America

Qing Claire Yu