Seven performance parameters of the cone calorimeter.

1. The mass loss rate of the cone calorimeter.

The mass loss rate of the cone calorimeter refers to the rate of change of the mass of the burning sample over time during the combustion process. It reflects the degree of thermal cracking, volatilization and combustion of the material under a certain fire intensity.

The mass loss rate value is calculated by a 5-point numerical differential equation, and the unit of MLR is g/s.

In addition to the mass loss rate, the mass loss curve can also be obtained from CONE, so as to obtain the residual mass at different times, which is convenient for visual analysis of the cracking behavior of the combustion sample.

2. The smoke generation rate of the cone calorimeter.

The smoke generation rate of the cone calorimeter is defined as the ratio of the specific extinction area to the mass loss rate, in m2/S, where SEA is the Specific Extinction Area (Specific Extinction Area), and SEA represents the volatilization of a unit mass of material produced It does not directly indicate the amount of smoke produced, it is just a conversion factor for calculating the amount of smoke produced, and the unit is m?/kg.

Similarly, the total smoke rate (Total Smoke Rate) can be obtained by integration, TSR=∫SPR, TSR represents the cumulative total smoke generated when a unit sample area is burned, and the unit is m?/m?.

3. The smoke generation rate of the cone calorimeter is effective combustion heat.

The smoke generation rate of the cone calorimeter. The effective combustion heat represents the ratio of the measured heat release rate to the mass loss rate at a certain time t. It reflects the combustion degree of the volatile gas in the gas phase flame. The mechanism is very helpful.

The unit of effective combustion heat of smoke generation rate of cone calorimeter is MJkg-1.

4. The ignition time of the cone calorimeter.

The cone calorimeter is an important parameter (unit: s) to evaluate the fire resistance of materials. It refers to the time from the surface of the material being heated to the continuous burning of the surface under the preset intensity of the incident heat flow. Ignition time can be used to evaluate and compare the fire resistance of materials.

5. Toxicity determination of cone calorimeter.

When the material burns, it emits a variety of gases, including CO, HCN, SO2, HCl, H2S and other toxic gases. Toxic gases are extremely harmful to the human body. The composition and percentage content can be added to the cone calorimeter. Equipment collection and analysis.

6. The heat release rate of the cone calorimeter.

The heat release rate of the cone calorimeter refers to the heat release rate per unit area after the material is ignited under the preset intensity of the incident heat flow.

The heat release rate of the cone calorimeter is the most important performance parameter to characterize the fire intensity, the unit is kW/m2; the maximum value of HRR is the peak of heat release rate (Peak of HHR, referred to as pkHRR), and the size of pkHRR characterizes the combustion of the material The maximum degree of heat release at the time. The greater the HRR and pkHHR, the greater the burning heat of the material, and the greater the fire hazard.

7. The total heat released by the cone calorimeter.

The total released heat refers to the total amount of heat released by the material from the ignition to the flame extinguishment under the preset intensity of the incident heat flow, and the unit is MJ/m?.

Combining HRR and THR can better evaluate the flammability and flame retardancy of materials, and have a more objective and comprehensive guiding role for fire research.