The electrostatic protection principle of pearl cotton is to form an electrostatic insulating layer by absorbing water molecules in the air. The anti-static effect of ordinary pearl cotton is 3 months, and the anti-static effect will gradually decrease in the third month. The anti-static performance gradually decreases with time, that is to say, the anti-static performance of pearl cotton has a shelf life. The preservation requirements of anti-static epe foam are higher than that of ordinary pearl cotton. It is best to keep it away from light and relatively sealed in a warehouse with constant temperature and humidity, which will prolong its anti-static performance.