The large usage of air filter paper is a common phenomenon now. But many people may not know the material of air filter paper or do not know why is e-fine glass fiber. Let me tell you. I am a employee in the filter paper manufacturer, which export for many years.
Alkali fiber poor water resistance, long exposed to the air, in the air, water erosion, prone to "suck base" phenomenon, and thus, the strength of the fiber is still missing, powdered fiber. E-fiber, the alkali metal oxide content less than 0.8%, the water resistance superior to the base fibers.