MULTI-LAYER CEILING TILE

摘要

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.

主权项

1. 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.