FILTER MEDIA COMPRISING FIBRILLATED FIBERS AND GLASS FIBERS
Filter media comprising fibrillated fibers and glass fibers are generally described.
1 . A filter media, comprising:
a multi-phase layer,
wherein the multi-phase layer comprises a first phase and a second phase,
wherein the first phase comprises fibrillated fibers and greater than or equal to 25 wt % glass fibers,
wherein the second phase comprises cellulose fibers and/or synthetic fibers,
wherein at least a portion of the fibers of the first phase are intermingled with at least a portion of the fibers of the second phase at an interface of the first phase and the second phase, and
wherein the filter media has a dry Mullen burst strength of greater than 50 kPa and less than or equal to 2,000 kPa.
2 . The filter media of claim 1 , wherein the first phase comprises greater than or equal to 25 wt % and less than or equal to 80 wt % glass fibers.
3 - 4 . (canceled)
5 . A filter media, comprising:
a multi-phase layer comprising a first phase comprising fibrillated fibers and glass fibers and a second phase;
wherein the first phase comprises greater than or equal to 25 wt % and less than or equal to 80 wt % glass fibers; and
wherein the filter media has a dry Mullen burst strength of greater than 50 kPa and less than or equal to 2,000 kPa.
6 . A filter media, comprising:
a multi-phase layer comprising a first phase comprising fibrillated fibers and glass fibers and a second phase;
wherein the first phase comprises greater than or equal to 25 wt % and less than or equal to 80 wt % glass fibers; and
wherein the first phase has a dry Mullen burst strength of greater than 50 kPa and less than or equal to 250 kPa.
7 - 9 . (canceled)
10 . The filter media of claim 1 , wherein the multi-phase layer is a dual phase layer.
11 . The filter media of claim 1 , wherein the first phase comprises greater than or equal to 30 wt % and less than or equal to 50 wt % glass fibers compared to the total fiber content of the first phase.
12 . The filter media of claim 11 , wherein the first phase comprises less than 40 wt % glass fibers.
13 - 16 . (canceled)
17 . The filter media of claim 1 , wherein the first phase comprises greater than or equal to 40 wt % fibrillated fibers and less than or equal to 70 wt % fibrillated fibers compared to the total fiber content of the first phase.
18 . The filter media of claim 1 , wherein the glass fibers comprise microglass fibers.
19 - 20 . (canceled)
21 . The filter media of claim 1 , wherein the fibrillated fibers comprise Lyocell fibers.
22 - 35 . (canceled)
36 . The filter media of claim 1 , wherein the second phase comprises greater than or equal to 70 wt % and less than or equal to 100 wt % cellulose fibers compared to the total fiber content of the second phase.
37 - 52 . (canceled)
53 . The filter media of claim 1 , wherein the multi-phase layer is formed by a process comprising wet end compression.
54 - 64 . (canceled)
65 . The filter media of claim 1 , wherein the filter media comprises an additional layer.
66 . The filter media of claim 65 , wherein the additional layer comprises meltblown fibers.
67 - 76 . (canceled)
77 . The filter media of claim 65 , wherein the additional layer is bonded to the first phase without an adhesive.
78 . The filter media of claim 65 , wherein the additional layer is bonded to the first phase without an adhesive with a z-directional bonding strength of greater than or equal to 1 N and less than or equal to 100 N.
79 - 80 . (canceled)
81 . The filter media of claim 1 , wherein the filter media has an air permeability of greater than or equal to 1 CFM and less than or equal to 50 CFM.
82 - 83 . (canceled)
84 . The filter media of claim 1 , wherein the filter media has an initial efficiency at 1.5 microns of greater than or equal to 80% and less than or equal to 100%.
85 . The filter media of claim 1 , wherein the filter media has a dust holding capacity of greater than or equal to 10 gsm and less than or equal to 500 gsm.
86 - 90 . (canceled)