It is mainly used as substrate for lead-acid battery separator plates. It is characteriaed as smooth surface, uniform thickness, low DC mass resistivity, high absorption dexidized KknO4 organic substance and impurity as well as proper stiffness. The substrate for lead-acid battery separator plate made of this mat has the advantages of good mechanic strenth and vibration resisitance,low mass resistivity, high porosity and large capacity. So that is widely used in the battery field, and it has become the main substrate material for battery separator plate.