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Glass wool insulation is mostly made from recycled glass but it also includes some other ingredients - sand, soda ash, borax and limestone. These raw materials are weighed and mixed to the required formula.
The other important component is resin, which is used to bind the glasswool together. The resin contains the pink colour that gives Pink® Batts® insulation its trademark colour.
The material is melted at temperatures around 1400°C, becoming liquid at 1200°C. The liquid material is then put into spinners, which are a type of cylinder with thousands of small holes drilled in them. The process is similar to the way candy floss is made.
The liquid glass is spun through the holes in the spinner to form a veil of fine fibres and the resin is sprayed onto the glass fibres as they are formed.
The glass fibres are sucked into a forming hood and fall onto a conveyor, forming a continuous mass of glass wool. Next the resin is cured by heating the product to around 270°C. Once cured, the resin holds the product together.
The product comes out of the oven in continuous form and is cut to the required length.
Once the Pink® Batts® product has been cut, it is ready for packaging. During this stage the product is stacked, compressed and pushed into bags. Each bag is sealed, further compressed and pushed into a sleeve forming a bale. Each pack is weighed to ensure it meets our strict quality standards.
The packs are then transported to the distribution centre and dispatched to the plant’s customers.
Because glass wool bounces back into shape well, it can be compressed to a fraction of its nominal height. Several piece of insulation can be tightly packed together in a bale which enables cost effective storage and transportation.
