HIGH EFFICIENCY AND HIGH CAPACITY FILTER MEDIA
A high efficiency and high capacity filter medium (10) including a top layer of fibrous felt material (12), an intermediate layer of melt-blown material (14), and a substrate layer (16) needled together into an integrated layer of filter material. The substrate layer (16) is formed of a layer of composite fiber including a group of melt-blown fibers interspersed between groups of spun-bonded fibers. Alternatively, the substrate layer is formed of spun-bonded material.