Insulation materialsMineral wool

Glasswool

Glasswool is made from natural sand to which recycled glass (cullet) and fluxing agents are added. The material is melted to 1100°C in an electric furnace. The fibre is formed by centrifugation through drilled disks. Fiberising is integral. Binding products as well as elements specific to the usage are added and the wool mat is polymerised and rolled. The product is then packaged

ULTIMATE

ULTIMATE production process is based on the glass wool production process. The challenge was to develop the process in a much higher temperature range than what was possible so far. By a patented new glass composition and extensive conversions in manufacturing equipments, the break-through has been successfully melted.

Stonewool

In the case of stonewool, the raw material is basalt or blast furnace slag. To this is added fluxing agents and coke, melted in a cupola at 1400 °C. The wool is fiberised by projection onto high speed rotors. Part of the fibre is “infibrated” (by the process) in the form of rock nodules. Binding products and elements specific to each usage are added. Then the wool mat is polymerised and rolled. The product is then packaged.

Recycled glass as a raw material

Since 1990, Saint Gobain Isover has incorporated recycled glass into the production of glasswool, reaching 80% in certain sites. This recycled glass has various origins: glass, glazing, vials, neon tubes, etc. The main obstacle preventing use of recycled glass is the presence of parasitical objects such as ceramics or heavy metals. To limit risks, some household glass recycle specialists have developed a specific grinding and sieving process. Thanks to this raw material, the quality of products is constantly improved and the level of energy consumed for fusion of the glass, regularly lowered.