The largest use of perlite ore in North America is its expansion and use in ceiling tile manufacturing.
Benefits of Expanded Perlite for Ceiling Tiles
Some ceiling tiles contain up to 70% by weight of expanded perlite because of its numerous benefits such as:
- Energy savings
- Fire resistant
- Improved acoustical properties
- Reduced water absorption
Wet-Felted Acoustical Ceiling Tile and Panels
Expanded perlite (40-50%) is also present in a unique wet-felted acoustical tile and ceiling panel composition. Expanded perlite is favorable in the production of ceiling tiles and panels to reduce the tendency to retain water in a composition containing expanded perlite, mineral wool, and a secondary binder such as starch or clay. It has been found that an acoustical tile composition containing wet-felted, mineral fiber and lightweight expanded perlite help to promote an efficient installation, anti-sag performance and prevent mold and mildew.