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US 7,390,566 B2Granted
Viscose product
AssigneeWeyerhaeuser Company
InventorsMengkui Luo, John A. Westland
Life of this patent
Estimating the term…
Abstract
Pulp with a high hemicellulose level is blended with a dissolving grade pulp and converted to viscose. Blending can be performed during steeping or after steeping. Spinning of the viscose containing the blend, into filaments yields fibers with strength properties that are at least equal to those of the dissolving pulp alone.
Claims5
A viscose product, comprising:
- at least 3.8 percent by weight hemicellulose;
- and
- cellulose, wherein the non dissolving grade pulp used to make the product has a D.P. of at least 700, a hemicellulose level of at least 10% by weight, an S18 of at least 13% by weight and an S10 of at least 15% by weight.
Dependencies are inferred from the claim text.