Calcium silicate fireproof door core board is an inorganic board with very stable physical and chemical properties. It has high heat resistance, low thermal conductivity, good insulation and sound insulation effect, low bulk density, high strength, long-term use without deformation, can be processed and spliced arbitrarily, does not contain asbestos, does not produce toxic and harmful gases at high temperatures, and no smoke diffusion. It is a very suitable inner core material for fireproof and sound insulation doors, and is a green and environmentally friendly building material. This type of core material has been widely used in the core material of medium and high-end fireproof and soundproof doors in various buildings, with a fire resistance limit of up to 90 minutes, and even more than 120 minutes.
