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. 16, 2022
Filed:
Dec. 05, 2017
Applicant:
Re:newcell Ab, Stockholm, SE;
Inventors:
Assignee:
RE:NEWCELL AB, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01F 2/02 (2006.01); D01F 2/06 (2006.01); D21C 9/153 (2006.01); D21C 9/147 (2006.01);
U.S. Cl.
CPC ...
D01F 2/02 (2013.01); D01F 2/06 (2013.01); D21C 9/147 (2013.01); D21C 9/153 (2013.01);
Abstract
There is provided a cellulose based fiber made of a i) cellulose dissolving pulp, and ii) a recycled cellulose textile, which is treated to swell the cellulose with a reducing additive and a) bleached with oxygen at alkaline conditions with a pH in the range 9-13.5 and/or b) bleached with ozone at acid conditions below pH 6, wherein the cellulose based fiber is manufactured with one selected from a Viscose process and a Lyocell process. Advantages include that the tensile strength of the fiber is improved and it is possible to manufacture improved cellulose fibers which comprise a fraction of recycled material.