Integrated nonwoven laminate material

Abstract

An integrated nonwoven laminate material suitable for use as a filter medium having a microfiber layer integrated with a low loft multicomponent spunbond layer and a high loft multicomponent spunbond layer and a method of producing the integrated nonwoven laminate material. In one embodiment of this invention, a laminate material is through-air bonded to form an integrated nonwoven laminate material which is then electret treated to enhance attraction between particles being filtered and the fibers of the integrated nonwoven laminate material. In one embodiment of this invention, the integrated nonwoven laminate material is used as a filter having an ASHRAE Standard 52.1-1992 Dust Spot Efficiency of about 40% to about 95% and an ASHRAE Standard 52.2-1999 MERV (Minimum Efficiency Reporting Value) of 12 to 16.

Dependencies are inferred from the claim text.