Flutable fiber webs with high dust holding capacity
The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction.
1. A fiber web comprising synthetic fibers, wherein the weight percentage of synthetic fibers is between 50% and 100% of the total weight percentage of fibers in the fiber web and the synthetic fibers are wet-laid,
the fiber web having:
a dust holding capacity of greater than about 3 mg/cm 2 and
a thickness of less than about 30 mils, wherein the dust holding capacity is measured by Palas filtration performance according to ISO Procedure 5011:2000 when a pressure drop across the fiber web reaches 1,500 Pa with a test face velocity of 20.0 cm/sec and using SAE fine dust at a dust mass concentration of 200.0 mg/m 3 .
2. The fiber web of claim 1 , wherein the fiber web has a dust holding capacity of between about 3 mg/cm 2 and about 8 mg/cm 2 .
3. The fiber web of claim 2 , wherein the weight percentage of synthetic fibers is between 50% and 95% of the total weight percentage of fibers in the fiber web.
4. The fiber web of claim 1 , wherein the weight percentage of synthetic fibers in the fiber web is 100%.
5. The fiber web of claim 1 , wherein the fiber web has a thickness of between about 5 mils and about 15 mils.
6. The fiber web of claim 1 , wherein the fiber web includes a cross-linked resin formulation.
7. The fiber web of claim 1 , wherein the fiber web has a tensile elongation in the cross-machine direction of greater than about 2%.
8. The fiber web of claim 1 , wherein the fiber web has a tensile elongation in the cross-machine direction is between about 2% and about 15%.
9. The fiber web of claim 1 , wherein the fiber web has a basis weight between 30 g/m 2 and about 100 g/m 2 .
10. The fiber web of claim 1 , wherein the fiber web has a permeability of between about 5 cfm/sf and about 200 cfm/sf.
11. The fiber web of claim 1 , wherein the fiber web has a machine direction tensile elongation of between about 3% and about 8%.
12. The fiber web of claim 1 , wherein the fiber web has a machine direction tensile elongation of between about 3% and about 5%.
13. A filter element comprising the fiber web of claim 1 .
14. A fiber web comprising synthetic fibers, wherein the weight percentage of synthetic fibers is between 50% and 100% of the total weight percentage of fibers in the fiber web,
the fiber web having:
a dust holding capacity of greater than about 3 mg/cm 2 , wherein the dust holding capacity is measured by Palas filtration performance according to ISO Procedure 5011:2000 when a pressure drop across the fiber web reaches 1,500 Pa with a test face velocity of 20.0 cm/sec and using SAE fine dust at a dust mass concentration of 200.0 mg/m 3 ; and
a basis weight between 30 g/m 2 and about 100 g/m 2 .
15. The fiber web of claim 14 , wherein the fiber web has a dust holding capacity of between about 3 mg/cm 2 and about 8 mg/cm 2 .
16. The fiber web of claim 15 , wherein the weight percentage of synthetic fibers is between 50% and 95% of the total weight percentage of fibers in the fiber web.
17. The fiber web of claim 14 , wherein the weight percentage of synthetic fibers in the fiber web is 100%.
18. The fiber web of claim 14 , wherein the fiber web has a thickness of between about 5 mils and about 15 mils.
19. The fiber web of claim 14 , wherein the fiber web includes a cross-linked resin formulation.
20. The fiber web of claim 14 , wherein the fiber web has a tensile elongation in the cross-machine direction of greater than about 2%.
21. The fiber web of claim 14 , wherein the fiber web has a tensile elongation in the cross-machine direction is between about 2% and about 15%.
22. The fiber web of claim 14 , wherein the fiber web has a basis weight between 60 g/m 2 and about 80 g/m 2 .
23. The fiber web of claim 14 , wherein the fiber web has a permeability of between about 5 cfm/sf and about 200 cfm/sf.
24. The fiber web of claim 14 , wherein the fiber web has a machine direction tensile elongation of between about 3% and about 8%.
25. The fiber web of claim 14 , wherein the fiber web has a machine direction tensile elongation of between about 3% and about 5%.
26. The fiber web of claim 14 , wherein the synthetic fibers are wet laid.
27. A filter element comprising the fiber web of claim 14 .