Patent · US Active

Cellulose fibers

US11414789B2 · kind B2 · utility

3Cited by

4References

18Claims

0Family size

Assignee

RE:NEWCELL AB · SE

Inventors

Mikael Lindstrom · Lidingö, SE
Christofer Lindgren · Stockholm, SE
Gunnar Henriksson · Solna, SE

Key dates

Filing date	Dec 5, 2017
Grant date	Aug 16, 2022
Priority date	—
Expiry date	Dec 26, 2037

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C9/153
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.