The fireproof performance of aluminum composite panel depends on the combustion characteristics of the core material and the blocking ability of the heat conduction path. This sandwich structure material forms a specific thermodynamic response mode through the composite of metal surface layer and polymer core material. The core of its flame retardant performance lies in the degree of chemical modification of the core material.
The heat reflection characteristics of the metal surface layer play a barrier role in the early stage of the fire. The high thermal conductivity of the aluminum composite panel makes the local high temperature spread rapidly, delaying the time window for the core material to reach the pyrolysis temperature. In the structural design dimension of aluminum composite panel materials, the breaking energy of the molecular chain of the cross-linked core material is improved, making the material more inclined to soften rather than drop when heated, effectively inhibiting the spread of flames. The thermal stability of the interface bonding layer is also critical. The bonding system modified by silane coupling agent forms a ceramic transition layer at high temperature to maintain structural integrity to delay overall collapse.
The advanced fireproof performance of aluminum composite panel is reflected in the control of smoke toxicity. The synergistic flame retardant system reduces the amount of CO generated in the combustion products and inhibits the formation of dioxins. The expansion seal design at the joints of the aluminum composite panel forms a second line of fire protection, and the matching of its thermal expansion coefficient with the main material determines the fire breakthrough time.
