What specific items are included in the fire resistance test of polyester fiber sound-absorbing panels?

The fire resistance test requires verification through both the oxygen index method and the vertical burning test. The testing agency will place the sample in an oxygen index tester, gradually reducing the oxygen concentration until the flame is extinguished, while recording the burning rate and smoke density values ​​to ensure that the product meets the fire resistance rating B1 requirements of GB 8624-2012.