... proof, alkali-resisting, heat-resistant, fireproof, anti-staticApplication: automobile engine system, filterSuitable user: chemicals Aperture ratio: 80% Weaving method: ... in distillation, absorption, evaporation, filtration in the process of petroleum, oil refining, chemical industry, light industry, pharmacy, metallurgy, machinery, ... foam in air and also used as air filter in cars and tractors ...