Fire Resistance Mechanism of Materials
Frame Materials: Steel frames must meet the requirements of "Fire-resistant Steel Doors and Windows for Buildings" (GB/T 12955-2015). The carbon and silicon content must be strictly controlled to ensure the formation of a dense oxide layer at high temperatures, preventing further oxidation.
Glass Materials: Composite fire-resistant glass consists of two or more layers of glass with an intermediate fire-resistant adhesive layer. In a fire, the adhesive layer expands due to heat, forming a thermal barrier. Simultaneously, a low thermal conductivity ceramicized layer forms on the glass surface, effectively blocking heat transfer.
Sealing and Insulation Design: Fire-resistant windows use EPDM rubber sealing strips with a temperature resistance range of -50℃ to 150℃. They maintain elasticity even at high temperatures, preventing smoke penetration. Some high-end products are also filled with insulation cotton or aerogel to further enhance insulation performance.
Interlocking Control Principle: Electric fireproof windows connect to the fire control module via an electromagnetic release device. Upon receiving a fire alarm signal, the electromagnet is de-energized and released, causing the window to close automatically under gravity or spring action. Manual fireproof windows achieve emergency closing through a mechanical locking device; the operating force must meet the standard of ≤100N in the "Fireproof Doors and Windows" (GB 12955-2008).
