One-piece dual density acoustical panel

Details One-piece dual density acoustical panel One-piece dual density acoustical panel

E - Fixed Constructions

04

B

18/1055, 181/17,

E04B 1/88 (2006.01) G10K 11/02 (2006.01)

Patent

CA 1098451

ONE-PIECE DUAL DENSITY ACOUSTICAL PANEL ABSTRACT OF THE DISCLOSURE A one-piece dual density rigid acoustical core panel of significantly different density at each opposing surface, one of said surfaces having the required smoothness and flatness to facilitate the application of decorative coverings, while the opposite surface is textured to form a regular pattern of indentations which act to regulate the increased density adjacent to the flat surface. The panel provides the most economical method available of achieving the required combined characteristics of acoustical ab- sorption, thermal insulation, surface flatness, thickness toler- ance, panel rigidity, tackability, flame-safety and impact resistance. The method for producing the panel comprises pressing a molding tool into an uncured layer of fibrous material of predetermined uniform thickness and density at an elevated temperature to form and set the textured surface and the opposing smoother surface at the desired densities. A process is also described for fusing a molded integrated frame about the perimeter of one of the above mentioned core panels, said frame being of greater thickness than the maximum thickness of the panel to create an air space behind the acoustical panel for the purpose of increasing acoustical absorption characteristics of the panel by introduction of a dead air space which in some design applications dissipates sound energy more efficiently than if there were no dead air space behind the panel.

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