... glass fiber; ventilation paper, medium and hepa paper, ulpa paper. Fiberglass air filter paper(factory) air filter filter paper1)Main material is ... efficiency, it can be defined as ventilation paper, medium and hepa paper, ulpa paper.3)Ventilation paper: be mainly used ... , nuclear power station ventilation system, top grade home cleaner, air purifier, gas mask.4)Ulpa paper: Be mainly used in CMOS ...