The fire curtain generally consists of the following parts: forming clamps, glass fiber decorative cloth, fireproof fabric, fire blanket, and radiation-resistant cloth. The reason why the filling material of the fire curtain can have strong fire resistance is not only due to the strong fire resistance of the external application materials but also because the internal filling material plays a role with equally high requirements for fire resistance.

Among the commonly used fillers for fireproofing curtains, asbestos has become one of the most widely used due to its high tensile strength, flexibility, resistance to chemical and thermal erosion, electrical insulation, and spinnability. Asbestos is composed of bundles of fibers, which in turn are made up of very long and fine fibers that can be separated from each other. Asbestos's high fire resistance, electrical insulation, and thermal insulation properties make it an important material for fire protection, insulation, and thermal insulation. Aluminum silicate refractory fiber cotton is characterized by stable performance, long fibers, high tensile strength, and low slag content. The product is widely used as a raw material for fiber textile products, fiber spraying, casting materials, coating materials, raw materials for hydro products, and as a filler for gaps in high-temperature areas of equipment. In use, aluminum silicate refractory fiber cotton exhibits many product characteristics: low thermal capacity and low thermal conductivity; excellent thermal stability; good thermal shock resistance; excellent chemical stability; free from binders and corrosive substances; and good sound absorption. All these product characteristics are sufficient to support and prove its suitability as a qualified filler for fireproofing curtains, stabilizing the curtain's fire resistance.