NANOFIBER FILTER FACEMASKS AND CABIN FILTERS
First Claim
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1. A filtration medium, comprising:
- a fine filter layer comprising a plurality of nanofibers; and
a coarse filter layer comprising a plurality of microfibers, the coarse filter layer attached to said fine filter layer,wherein said coarse filter layer is positioned proximal to a direction of fluid flow, and said fine filter layer is positioned distal to said direction of fluid flow.
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Abstract
A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.
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Citations
38 Claims
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1. A filtration medium, comprising:
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a fine filter layer comprising a plurality of nanofibers; and a coarse filter layer comprising a plurality of microfibers, the coarse filter layer attached to said fine filter layer, wherein said coarse filter layer is positioned proximal to a direction of fluid flow, and said fine filter layer is positioned distal to said direction of fluid flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of making a filtration medium, comprising:
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providing a fine filter layer comprising a plurality of nanofibers; providing a coarse filter layer comprising a plurality of microfibers; and attaching said fine filter layer to said coarse filter layer, wherein said coarse filter layer is positioned proximal to a direction of fluid flow and said fine filter layer is positioned distal to said direction of fluid flow. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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Specification