Hong Kong or the United Kingdom often use the BS476-4 non-combustibility requirement as the standard for evaluating the flame retardant performance of materials. Therefore, we should first understand the non-combustibility evaluation requirements in order to better adjust the product performance to meet the requirements.
Test Standard of Non combustibility Tester:
BS 476-4: Fire tests on building materials and structures- Part 4: Non-combustibility test for materials
Ttest sample size of Non-combustibility Tester:
Introduction to the BS476-4 non-combustibility test process:
After the sample is adjusted in a ventilated drying oven at 60±5℃ for 24h, it is put into the test container, a thermocouple is inserted into the center of the sample to record the temperature change, and the other thermocouple is put into the furnace to record the temperature change. The temperature in the furnace is stabilized at 750±10℃ for at least 10 minutes, and the whole test is 20 minutes, and the relevant data of the two thermocouples are recorded.
BS476-4 non-combustibility test and evaluation requirements of non-combustibility tester:
1. The temperature rise of the two thermocouples must be less than 50℃.
2. The flame burning time during the test must be less than 10s.