Study on the influence of core layer thickness on combustion characteristics of polyethylene-based aluminum composite panel
The combustion characteristics of polyethylene-based aluminum composite panels with different core layer thicknesses were studied by using cone calorimeter.Four heat fluxes of 35,50,65,and 80 kW/m2 were selected to obtain the ignition charac-teristics,fire risk,and smoke toxicity.The results showed that polyethylene-based aluminum composite panels conform to the ig-nition law of thermal thin materials,and the derived critical igni-tion heat fluxes of 3,4,5 mm thick core layers are 33.9,25.1,9.9 kW/m2,respectively.With the increase of heat flux,the heat release rate of aluminum composite panels of each thickness in-creases obviously,and the heat release rate tends to double peak.With the increase in heat flux and core layer thickness,there was a rapid decrease in the Fire Performance Index(FPI)from 41 to 0.14,accompanied by a rapid increase in the Fire Growth Index(FGI)from 0.02 to 3.19,and the CO release rate also rapidly in-creases,resulting in a significant increase in fire hazard.
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