In order to ensure the safe and reliable use of the plastic impeller in coal mines,thermal stability test of the plastic impeller used in coal mine auxiliary fan was carried out according to relevant standards,and the change of the flame- retarded ability,the antistatic property,the shock resistance,the tensile strength and so on of the plastic impeller before and after its test was analyzed and summarized. The test results showed that before and after the thermal stability test of the plastic impeller,its ...