The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2006
Filed:
Oct. 10, 2001
James E. Sealey, Ii, Federal Way, WA (US);
W. Harvey Persinger, Jr., Enumclaw, WA (US);
Mengkui Luo, Tacoma, WA (US);
Vincent A. Roscelli, Edgewood, WA (US);
Amar N. Neogi, Seattle, WA (US);
James E. Sealey, II, Federal Way, WA (US);
W. Harvey Persinger, Jr., Enumclaw, WA (US);
Mengkui Luo, Tacoma, WA (US);
Vincent A. Roscelli, Edgewood, WA (US);
Amar N. Neogi, Seattle, WA (US);
Weyerhaeuser Company, Federal Way, WA (US);
Abstract
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular weight distribution. Further, the present invention provides processes for making compositions, useful for making lyocell fibers, by contacting an alkaline pulp having a high hemicellulose content of at least about 7% with an oxidant sufficient to reduce the average degree of polymerization to about 200 to 1100 without substantially reducing the hemicellulose content or increasing the copper number of the pulp.