Fiber webs including synthetic fibers
Filter media suitable for various applications and related components, systems, and methods associated therewith are described. The filter media may include a fiber web having a mixture comprising non-fibrillated synthetic fibers and fibrillated fibers, such as lyocell. The fiber web may also include multi-component fibers (e.g., bi-component fibers). In some embodiments, glass fibers are not incorporated into the fiber web.
1. A fiber web comprising a plurality of non-fibrillated synthetic fibers and a plurality of fibrillated fibers, wherein the non-fibrillated synthetic fibers comprises between about 30 weight % and about 95 weight % of the fiber web, and the fiber web has a dust holding capacity of greater than about 40 g/m 2 and a machine direction tensile strength of greater than about 3 N/15 mm.
2. The fiber web of claim 1 , wherein the fiber web comprises a weight percentage of glass fibers of between 0% and about 5%.
3. The fiber web of claim 1 , wherein the fiber web is substantially free of glass fibers.
4. The fiber web of claim 1 , wherein the plurality of non-fibrillated synthetic fibers comprises a plurality of multi-component fibers.
5. The fiber web of claim 4 , wherein the fiber web comprises between about 1 weight % and about 20 weight % multi-component fibers.
6. The fiber web of claim 5 , wherein the fiber web comprises less than about 10 weight % multi-component fibers.
7. The fiber web of claim 6 , wherein the fiber web comprises less than about 5 weight % multi-component fibers.
8. The fiber web of claim 1 , wherein the fiber web comprises between about 5 weight % and about 60 weight % fibrillated fibers.
9. The fiber web of claim 1 , wherein the plurality of fibrillated fibers have a Canadian Standard Freeness level of fibrillation of between about 50 mL and about 850 mL.
10. The fiber web of claim 9 , wherein the plurality of fibrillated fibers have an average Canadian Standard Freeness level of fibrillation of between about 150 mL and about 600 mL.
11. The fiber web of claim 10 , wherein the plurality of fibrillated fibers have an average Canadian Standard Freeness level of fibrillation of between about 200 mL and about 350 mL.
12. The fiber web of claim 1 , wherein the plurality of the fibrillated fibers comprises a plurality of lyocell fibers.
13. The fiber web of claim 12 , wherein the plurality of lyocell fibers have an average Canadian Standard Freeness level of fibrillation of between about 50 mL and about 850 mL.
14. The fiber web of claim 13 , wherein the plurality of lyocell fibers have an average Canadian Standard Freeness level of fibrillation of between about 150 mL and about 600 mL.
15. The fiber web of claim 14 , wherein the plurality of lyocell fibers have an average Canadian Standard Freeness level of fibrillation of between about 200 mL and about 350 mL.
16. The fiber web of claim 1 , wherein the fiber web has a cross-machine direction tensile elongation of greater than about 0.2%.
17. The fiber web of claim 1 , wherein the fiber web has a dry Schopper burst strength of greater than about 5 kPa.
18. The fiber web of claim 1 , wherein the fiber web has a cross-machine direction tensile strength of greater than about 2 N/15.
19. The fiber web of claim 1 , wherein the fiber web has a beta efficiency ratio of greater than or equal to about 200 for particles having an average diameter of greater than about 10 microns.
20. A filter element comprising the fiber web of claim 1 .
21. A filter media comprising:
a first layer having a first plurality of non-fibrillated synthetic fibers and a first plurality of fibrillated fibers, wherein the first plurality of non-fibrillated synthetic fibers comprises between about 30 weight % and about 95 weight % of the first layer; and
a second layer having a second plurality of non-fibrillated synthetic fibers and a second plurality of fibrillated fibers, wherein the second plurality of non-fibrillated synthetic fibers comprises between about 30 weight % and about 95 weight % of the second layer;
wherein the filter media has a dust holding capacity of greater than about 40 g/m 2 and a machine direction tensile strength of greater than about 3 N/15 mm.
22. The filter media of claim 21 , wherein the average Canadian Standard Freeness level of fibrillation of the first plurality of fibrillated fibers is greater than the average Canadian Standard Freeness level of fibrillation of the second plurality of fibrillated fibers.
23. The filter media of claim 21 , wherein the weight percentage of the second plurality of fibrillated fibers within the second layer is greater than the weight percentage of the first plurality of fibrillated fibers within the first layer.
24. A fiber web comprising a plurality of non-fibrillated synthetic fibers and a plurality of fibrillated fibers, wherein the plurality of fibrillated fibers have a Canadian Standard Freeness level of fibrillation of between about 50 mL and about 850 mL and the non-fibrillated synthetic fibers comprises between about 30 weight % and about 95 weight % of the fiber web, and the fiber web has a dust holding capacity of greater than about 40 g/m 2 and a machine direction tensile strength of greater than about 3 N/15 mm.
25. The fiber web of claim 24 , wherein the plurality of non-fibrillated synthetic fibers comprises a plurality of multi-component fibers.
26. The fiber web of claim 25 , wherein the fiber web comprises between about 1 weight % and about 20 weight % multi-component fibers.
27. The fiber web of claim 24 , wherein the fiber web comprises a weight percentage of glass fibers of between 0% and about 5%.