Nonwoven web with bimodal fiber distribution
AssigneeCummins Filtration IP, Inc.
InventorsKan Wang, William C. Haberkamp
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Abstract
A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 μm or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 μm or less. Also described herein is a method for making the nonwoven web, comprising melt-blowing a polymer mixture comprising two immiscible or partially miscible polymers.
Claims29
A nonwoven web comprising a layer of polymeric fibers, wherein, based on a total number of polymeric fibers, at least 10% of the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 μm or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 μm or less.
A nonwoven web comprising a layer of polymeric fibers, wherein, based on a total number of polymeric fibers, at least 10% of the polymeric fibers in said layer are coarse fibers having a fiber diameter of 3 μm or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 1 μm or less.
A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% of the polymeric fibers in said layer are coarse fibers having a fiber diameter of 5 μm or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 3 μm or less.
Dependencies are inferred from the claim text.