... is glass fiber. Adopting the wet moulding. Uniform fiber distribution , large dust capacity, low resistance, high intension. It’s the ideal ... the efficiency, it can be defined as ventilation paper, medium and hepa paper, ulpa paper. Ventilation paper: be mainly used in air condition system ... , top grade home cleaner, air purifier, gas mask. ULPA paper: Be mainly used in CMOS chip factory and clean plant ...