Ningbo Changqi Porous Membrane Technology Co., Ltd., established in May 2006, is a manufacturer and trading company based in Ningbo, China. The company specializes in the independent research, development, and production of various grades of ePTFE membranes and laminated filtration media, with porosity ranging from 0.2 to 5μm. They offer OEM services and operate with ISO 9001 certification. Their product portfolio includes ePTFE Vacuum Cleaner filters, ePTFE HEPA Filters, face mask and respirator media, ePTFE Disc Filters, and ePTFE Industrial Cartridges. These products are widely used in air filtration, vacuum cleaner filtration, HEPA & ULPA filtration for clean rooms, microfiltration, and medical applications. With excellent manufacturing facilities, complete lab instruments, and experienced technical staff, Ningbo Changqi Porous Membrane Technology Co., Ltd. maintains a large-scale production workshop and standard production lines, ensuring products comply with national standards. The company has an annual output value of US$2.5 Million - US$5 Million and produced 2,000,000 square meters of ePTFE membrane in the previous year. They are registered with Dun & Bradstreet and have been audited.