Patent · US Active

Reduced furfural content in polyacrylic acid crosslinked cellulose fibers

US11725339B2 · kind B2 · utility

0Cited by

16References

16Claims

0Family size

Assignee

INTERNATIONAL PAPER COMPANY · US

Inventors

Angel Stoyanov · Federal Way, US
Joerg Endres · Frankfurt, DE
Holger Beruda · Schwalbach, DE
Ludwig Busam · Idstein, DE

Key dates

Filing date	Feb 11, 2020
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Feb 24, 2040

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/38
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Bleached polyacrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polyacrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. in some embodiments, furfural content decreases with aging of the treated crosslinked fibers.

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