1. Strength, pressure and strong: (not falling)? 2. Uniform structure, high porosity, filtration resistance, permeability;? 3. Resistant to high (low) temperature performance is strong; (steam filter)? 4 . anti-corrosion ability; (in the liquid in the water and no rust)? 5. long life; (several times for the general membrane filters)? 6. hardness, backwashing is easy; (easy to implement online flushing) 7 . on the human body strong affinity;? 8. molding, processing convenience, can be processed into various shapes according to requirements of the filter