Tests on flame retardant properties (constantly updated)

Smoke density test method

Smoke density testing is a test method used to evaluate the concentration of smoke produced by a material during combustion. Among them, ISO 5659-2 is a commonly used testing standard. The specific steps and requirements are as follows

The sample is cut according to the specified size (75mm×75mm), and the thickness should not exceed 25mm. Place the sample on the specimen frame and install the specimen frame into the tester.

Test Conditions. Samples are tested in a sealed furnace with a choice of irradiation intensity of 25 kW/m2 or 50 kW/m2. Start the ignition device to ignite the burner, and the control system will record the luminous flux through the sample, the pressure and temperature in the combustion chamber, and other parameters. The data that needs to be recorded includes the smoke density data at the 1.5th minute, the 4th minute and the maximum smoke density data during the entire test process. The entire testing process usually lasts 10 minutes. After the test is completed, the SDR smoke density development curve can be completed by drawing a curve to further analyze the change trend of smoke density.

Through the above steps, the smoke generation of the material during the combustion process can be effectively evaluated, providing an important reference for the fire protection performance of the material.