FILTER MEDIA COMPRISING ELASTOMERIC FIBERS
Filter media comprising one or more layers comprising nanofibers are generally described. In some embodiments, a filter media comprises a layer comprising nanofibers. The nanofibers may comprise an elastomer, a multiblock copolymer, and/or a multiblock copolymer that is an elastomer.
1 . A filter media, comprising:
a first layer comprising nanofibers, wherein the nanofibers comprise a multiblock copolymer comprising one or more poly(amide) blocks, and wherein the one or more poly(amide) blocks make up greater than or equal to 20 mol % and less than 100 mol % the multiblock copolymer; and
a second layer.
2 . A filter media, comprising:
a first layer comprising nanofibers, wherein the nanofibers comprise an elastomer, and wherein the nanofibers are at least partially fibrillated; and
a second layer.
3 . A filter media, comprising:
a first layer comprising nanofibers, wherein the nanofibers comprise an elastomer, and wherein the first layer has an initial water contact angle of greater than or equal to 70°; and
a second layer.
4 . A filter media as in claim 1 , wherein the first layer is a non-woven fiber web.
5 . A filter media as in claim 1 , wherein the second layer is a non-woven fiber web.
6 - 28 . (canceled)
29 . A filter media as in 1 , wherein the poly(amide) blocks are semicrystalline.
30 . A filter media as in claim 1 , wherein the poly(amide) blocks have a melting point of greater than or equal to 100° C.
31 . A filter media as in claim 1 , wherein the multiblock copolymer comprises a block having a glass transition temperature of less than or equal to 20° C.
32 . A filter media as in claim 1 , wherein the multiblock copolymer comprises a block that is amorphous.
33 - 36 . (canceled)
37 . A filter media as in claim 1 , wherein the multiblock copolymer comprises at least one poly(ether) block.
38 - 42 . (canceled)
43 . A filter media as in claim 1 , wherein the at least one poly(amide) block comprises Nylon 11 and/or Nylon 12.
44 . A filter media as in claim 37 , wherein the at least one poly(ether) block comprises poly(tetrahydrofuran).
45 - 59 . (canceled)
60 . A filter media as in claim 1 , wherein the first layer has a specific tensile strength of greater than or equal to 30 g/gsm.
61 . A filter media as in claim 1 , wherein the first layer has a water contact angle of greater than or equal to 70°.
62 . A filter media as in claim 1 , wherein the first layer has a mean flow pore size of greater than or equal to 0.1 micron and less than or equal to 15 microns.
63 . A filter media as in claim 1 , wherein the first layer has an air permeability of greater than or equal to 0.5 CFM and less than or equal to 10 CFM.
64 - 65 . (canceled)
66 . A filter media as in claim 1 , wherein the nanofibers have a mean fiber width of greater than or equal to 75 nm and less than or equal to 750 nm.
67 - 72 . (canceled)
73 . A filter media as in claim 1 , wherein the filter media has a gamma at the MPPS of greater than or equal to 30.
74 - 75 . (canceled)
76 . A filter media as in claim 1 , wherein an adhesive is positioned between at least two of the layers.
77 - 83 . (canceled)
84 . A filter media as in claim 1 , wherein the first layer is an electrospun layer.
85 - 101 . (canceled)