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US 8,263,506 B2Granted
Nonwoven lyocell fiber webs for filtration
AssigneeWeyerhaeuser NR Company
InventorMengkui Luo
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Abstract
Cellulose filtration products comprising nonwoven lyocell fiber webs in which the fibers have a diameter of from 3 to 12 microns, the largest pore diameter of less than about 300 microns and a mean flow pore diameter of less than about 150 microns are disclosed. Multilayer nonwoven lyocell fiber webs are also disclosed which have lower mean flow pore diameters and lower pore sizes.
Claims19
A cellulosic filtration product comprising:
- a nonwoven lyocell fiber web further comprising:
- fibers having a diameter of from about 3 to about 12 microns;
- fiber bundles having a diameter from 11.2 to 34.8 microns,
- wherein said web has a largest pore diameter less than about 300 microns;
- and
- a mean flow pore diameter of less than about 150 microns but greater than about 5 microns, and wherein
- the air permeability is from about 100 to about 7500 l/m2 sec.
4 more elements
Dependencies are inferred from the claim text.