Glass wool is an insulating material made from fibres of glass arranged using a binder into a texture similar to wool. The process traps many small pockets of air between the glass, and these small air pockets result in high thermal insulation properties. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated. The modern method for producing glass wool was invented by Games Slayter while he was working at the Owens-Illinois Glass Co. (Toledo, Ohio). He first applied for a patent for a new process to make glass wool in 1933.
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Glass wool is made from borosilicate glass and consists of other components such as silica sand, fixing agents, and recycled glass. Glass wool insulation used in acoustical fittings may be made of molten glass. Fibrous materials made from molten glass, loose wool, and ultra-fine wool are sandwiched between asphalt-bonded glass blankets to make fine glass wool panels. These panels have excellent noise control and acoustical properties, as well as thermal insulation properties that make them ideal for building control spaces.
Metal ceilings add strength to the structure and are highly durable compared to other ceiling materials. Hence, they are widely used for non-residential buildings like offices, hospitals, shopping malls, and airports.
The main components of Glasswool are sand, soda ash, limestone and recycled glass; stored in silos. The process starts with weighing, mixing and pouring the components into the furnace.
The mixed components are then melted in an electric gas furnace at temperatures in excess of 1,400°C.
The liquid glass obtained from the furnace is then passed through the feeder to the fibrillator where, with the help of a centrifugal spinner, it is pushed through small holes - forming fibres. These fibres are sprayed with binder and shaped into blankets.
The fibre blanket is passed through the curing oven, where it is compressed to the required thickness.
After the final thickness has been obtained, the blanket is cut to the required width. The trimmings obtained during cutting are eventually recycled to avoid waste.
Prior to packaging, the mats are rolled with the help of a board winder equipped at the end of the line. A stacker is provided for the boards.
As required, the glass wool can be compressed to ten times its volume for palletizing. The total of 36 rolls of glass obtained during this process can be packed on a pallet.
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