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US 8,802,229 B2Granted
Lyocell fibers
AssigneeWeyerhaeuser NR Company
InventorMengkui Luo
Life of this patent
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Abstract
Meltblown lyocell fibers incorporating polyolefinic hydrophobic polymers are disclosed. The polymer is distributed fairly uniformly within the fiber and exists as approximately one to two micron diameter domains. The fibers have a high hemicellulose level, show reduced water retention values and have varying diameters depending on processing conditions. The fibers have a brightness of at least 60.
Claims9
Meltblown lyocell fibers present in a fiber matrix comprising at least one polyolefinic polymer,
- wherein said polymer is in domains randomly and uniformly distributed throughout the lyocell fibers present in the fiber matrix,
- wherein said polymer has an acid number <8 mg KOH/g, and
- wherein said polymer has a weight average molecular weight of less than 50,000.
Dependencies are inferred from the claim text.