Filter media structures
AssigneeAscend Performance Materials Operations LLC
InventorsVikram GOPAL, Natasha DEAN, Albert ORTEGA, Wai-shing YUNG, Ping HAO
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Abstract
Provided herein are filter media structures having antimicrobial and/or antiviral properties. In particular, the present disclosure describes filter media structures having a first layer with an electret web and a second layer that demonstrates biological-reducing properties. In some cases, the first layer is formed from polypropylene (e.g., spunbond) and the second layer is formed from a plurality of fibers of a polyamide composition (e.g., meltblown).
Claims20
A filter media structure for purifying a stream comprising:
- a first layer having a first surface and second surface, wherein the first layer comprises a polymer, preferably polyolefin, polyester, polyurethane, polycarbonate, polystyrene, fluoropolymer, or copolymers or blends thereof;
- and
- a second layer adjacent to the first surface, wherein second layer comprises:
- from 50 to 99.9 wt. % of polymer fibers, based on the total weight of the second layer, each having a fiber diameter from 0.01 microns to 10 microns, and
- from 1 wppm to 30,000 wppm of a metallic compound comprising copper, zinc, or silver, or combinations thereof, and
- wherein at least one of the second layer demonstrates biological-reducing properties.
A filter media structure for purifying a stream comprising:
- a first layer that is an electrically-charged nonwoven web having a first surface and second surface, wherein the first layer comprises a polymer, preferably polyolefin, polyester, polyurethane, polycarbonate, polystyrene, fluoropolymer, or copolymers or blends thereof;
- and
- a second layer adjacent to the first surface, wherein second layer comprises:
- from 50 to 99.9 wt. % of polymer fibers, based on the total weight of the second layer, each having a fiber diameter from 0.01 microns to 10 microns, and
- from 1 wppm to 30,000 wppm of a metallic compound comprising copper, zinc, or silver, or combinations thereof, and
- wherein at least one of the second layer demonstrates biological-reducing properties.
A filter media structure for purifying a stream comprising:
- a first layer having a first surface and second surface, wherein the first layer comprises a polymer, preferably polyolefin, polyester, polyurethane, polycarbonate, polystyrene, fluoropolymer, or copolymers or blends thereof;
- and
- a second layer adjacent to the first surface, wherein second layer is a spunbond layer that comprises:
- from 50 to 99.9 wt. % of polymer fibers, based on the total weight of the second layer, and
- from 1 wppm to 30,000 wppm of a metallic compound comprising copper, zinc, or silver, or combinations thereof, and
- wherein at least one of the second layer demonstrates biological-reducing properties.
Dependencies are inferred from the claim text.