Multi-layer ceiling tile
AssigneeUSG Interiors, Inc.
InventorsBrian A. Kemp, Wei Xu
Life of this patent
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Abstract
A less costly multi-layer acoustical panel having improved noise absorption properties includes a fiberglass layer and a mineral wool layer wherein the fiberglass layer has a fibrous content comprising at least about 50% by weight of glass fiber and the mineral wool layer has a fibrous content comprising at least about 50% by weight of mineral wool fiber. The noise absorption coefficient of the panel is linearly related to increases in the thickness of the fiberglass layer. A lamination technique for making the panels is also disclosed.
Claims20
A multi-layer acoustical panel having improved sound absorption properties includes a fiberglass layer and a mineral wool layer;
- said fiberglass layer having a fibrous content comprising at least about 50% by weight of glass fiber, a thickness ranging from about ¼″ to about 1″, and a density of from about 1 lb/ft3 to about 20 lbs/ft3;
- said mineral wool layer having a fibrous content comprising at least about 50% by weight of mineral wool fiber, a thickness ranging from about ¼″ or more, and a density of from about 8 lbs/ft3 to about 20 lbs/ft3;
- said mineral wool layer being more dense than said fiberglass layer,
- said panel having a total thickness that is substantially provided by said fiberglass layer and mineral wool layer;
- and
- said panel having a noise reduction coefficient value of at least about 0.55.
A multi-layer acoustical panel having improved sound absorption properties includes a fiberglass layer and a mineral wool layer;
- said fiberglass layer having a fibrous content comprising at least about 50% by weight of glass fiber, a thickness ranging from about ¼″ to about 1″, and a density of from about 1 lb/ft3 to about 20 lbs/ft3;
- said mineral wool layer having a fibrous content comprising at least about 50% by weight of mineral wool fiber, a thickness ranging from about ¼″ or more, and a density of from about 8 lbs/ft3 to about 20 lbs/ft3;
- said mineral wool layer being more dense than said fiberglass layer,
- said panel having a total thickness that is substantially provided by said fiberglass layer and mineral wool layer;
- and
- said panel tile has a noise reduction coefficient value of at least about 0.55 and said panel noise reduction coefficient value linearly increases in response to increases in the thickness of said fiberglass layer.
A method of making a multi-layer acoustical panel having a room facing front side and an opposed rear side comprising the steps of:
- providing a surface layer containing fiberglass as a primary fibrous component to be positioned at said front side of said panel;
- providing a base layer containing mineral wool as a primary fibrous component to be positioned at the rear side of said panel, said surface layer and said base layer being formed in separate and different manufacturing processes;
- and
- joining said surface and base layers together to form said panel with a noise reduction coefficient value of at least about 0.55.
Dependencies are inferred from the claim text.