Furukawa Electric Co., Ltd. has developed a “thin high-thermal-expansion fire-resistant sheet” for buildings that exhibits flame-retardant and heat-insulating properties in the event of a fire.
The thin high-thermal-expansion refractory sheet is normally 2 mm thin and flexible, considering its application as a joint material and fireproof protective material. The thickness normally expands from 2 mm to 45 mm) and forms carbides to prevent the spread of fire. In addition, the carbide retains its shape without collapsing, making it more difficult for fire and heat to pass through than conventional products, ensuring fire spread prevention performance.
Thermal expansion fireproof sheets are used in building walls, ventilation holes, and joints such as packing materials. Until now, there have been cases in which heat insulation cannot be demonstrated due to the brittleness of the carbides formed during expansion, and there are also issues with fire passing through gaps due to insufficient expansion. Materials that can hold are needed.