Patent ID: 11898345
Assignee: CERTAINTEED CEILINGS CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
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.