A highly effective method of producing fine and efficient filter media is using melt blown technology. Meltblown fibers can have diameters under 10 µm, which is 1/12 the size of a human hair and 1/5 the size of a cellulose fiber.

The process of making Meltblown fabric filter media begins with raw synthetic thermoplastic material, such as polybutylterephtelate (PBT), polyethylene terephthalate (PET), or polypropylene (PP). The material is melted and forced through an extruder with numerous tiny nozzles. As the individual extrusions exit the nozzles in a semi-melted state, hot air blows them in the same direction. This extends them, resulting in the creation of very fine, continuous fibers. The fibers can then be mechanically, thermally, or chemically bound together to create a web-like fabric.