US 11,898,345 B2
Acoustic ceiling panel, method of manufacture and acoustic ceiling system
Yanjia Zuo, Marietta, GA (US); Chris L. Heikkinen, L'Anse, MI (US); John T. Madajewski, Malvern, PA (US); Phillip Evans, Littleton, MA (US); Chris W. Niemi, L'Anse, MI (US); Jeremiah L. Shaffer, L'Anse, MI (US); Isabelle Etchart Randlett, Malvern, PA (US); Robert Miller, L'Anse, MI (US); Keith C. Hong, Lititz, PA (US); and Zhengzhi Zhou, Malvern, PA (US)
Assigned to CertainTeed Ceilings Corporation, Malvern, PA (US)
Filed by CertainTeed Ceilings Corporation, Malvern, PA (US)
Filed on Mar. 15, 2021, as Appl. No. 17/201,784.
Claims priority of provisional application 62/989,301, filed on Mar. 13, 2020.
Prior Publication US 2021/0285207 A1, Sep. 16, 2021
Int. Cl. E04B 1/86 (2006.01); E04B 9/00 (2006.01); E04B 9/24 (2006.01); E04B 9/28 (2006.01); E04B 9/04 (2006.01); E04B 1/84 (2006.01)
CPC E04B 1/86 (2013.01) [E04B 9/001 (2013.01); E04B 9/0435 (2013.01); E04B 9/241 (2013.01); E04B 9/28 (2013.01); E04B 2001/8461 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An acoustic ceiling panel comprising:
an acoustic substrate formed of a porous material, the porous material comprising in the range of 60-95% on a dry weight basis of a fibrous material and in the range of 1-15% on a dry weight basis of a polymeric binder binding the fibrous material, the porous material having a density no more than 20 lb/ft3, the acoustic substrate having an air flow resistivity of at least 300 kPa*s/m2, the acoustic substrate including:
an upper face, and
a lower face with a pattern of perforations formed therein, the pattern of perforations covering at least 6% of the area of the lower face;
a backing layer disposed over the upper face of the acoustic substrate; and
a veil disposed over the lower face.