Nanofiber filter media for high performance applications
AssigneeCummins Filtration IP, Inc.
InventorsEric A. Janikowski, Mark P. Adams, Huanling Liu, Himani Deshpande, Scott W. Schwartz, Barry Mark Verdegan, Aiden Kim, Anna Balazy, Nathan Shafer
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Abstract
Disclosed here is a composite filter media having at least one nanofiber layer bonded to a substrate layer, the at least one nanofiber layer optionally having a plurality of nanofibers having a geometric mean diameter of less than or equal to 0.5 μm, the at least one nanofiber layer having a thickness of about 1-100 μm.
Claims14
A composite filter media, comprising at least one nanofiber layer bonded to a substrate layer, the at least one nanofiber layer comprising a plurality of nanofibers, each of the plurality of nanofibers having a geometric mean diameter of 0.1 to 0.5 μm, the at least one nanofiber layer having a thickness of about 2.9 μm to 21 μm and a nanofiber layer basis weight of 0.9 g/m2 to 5 g/m2, wherein the at least one nanofiber layer further comprises polymeric masses incorporated therein, the polymeric masses formed from clumps of nanofiber and polymeric beads,
- wherein:
- the polymeric masses are made of the same polymer as the plurality of nanofibers, and the polymeric masses are embedded within the plurality of nanofibers,
- at least some of the polymeric masses are not located at an interface between the at least one nanofiber layer and the substrate layer, and
- the plurality of nanofibers have a geometric standard deviation of the geometric mean diameter of greater than 1.4.
Dependencies are inferred from the claim text.