Thermal-acoustical insulation ceiling tiles
Thermal-acoustical ceiling tiles are manufactured from mineral wool, cellulose fibres, corn or potato starch, clay, fibre glass, and expanded perlite plus other additives. The proportion of perlite can vary enormously, 5-75% w/w, depending on the required properties of the finished product. Perlite is added to formulations to reduce the weight of the tile, improve thermal insulation, enhance acoustic properties of the tile, increase fire resistance, and impact different textures to the visible surface of the tile or panel. Moreover, the use of perlite provides for good aesthetics, as well as flexibility in cases of remodelling or changing of layouts.
Preformed products for insulation
Expanded perlite granules can be bonded to form rigid shapes e.g. for pipe insulation. Apart from their insulation properties, the produced shapes have anti-corrosion properties and are thermally efficient and fire resistant.
Other high temperature applications for insulation
Insulating and refractory bricks and castables, utilize perlite. Expanded perlite can be used in insulating formulations at service temperatures up to 900°C. In higher temperature applications, perlite refractories are often used as back-up insulating layers for higher duty refractories.