公开(公告)号：US20200181840A1

公开(公告)日：2020-06-11

申请号：US16788165

申请日：2020-02-11

Applicant: International Paper Company

Inventor： Angel Stoyanov ,  Joerg Endres ,  Holger Beruda ,  Ludwig Busam

IPC: D21C9/16 ,  D21C9/00

Abstract: Bleached polycrylic 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 polycrylic 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.

公开(公告)号：US20180087216A1

公开(公告)日：2018-03-29

申请号：US15829745

申请日：2017-12-01

Applicant: International Paper Company

Inventor： Angel Stoyanov ,  Joerg Endres ,  Holger Beruda ,  Ludwig Busam

IPC: D21C9/16 ,  D21C9/00

CPC classification number: D21C9/163 ,  D21C9/005

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.

公开(公告)号：US20230383461A1

公开(公告)日：2023-11-30

申请号：US18449233

申请日：2023-08-14

Applicant: INTERNATIONAL PAPER COMPANY

Inventor： Angel Stoyanov ,  Joerg Endres ,  Holger Beruda ,  Ludwig Busam

IPC: D21C9/16 ,  D21C9/00 ,  D21H17/38 ,  B01J20/26

CPC classification number: D21C9/163 ,  D21C9/005 ,  D21H17/38 ,  B01J20/26

Abstract: Bleached polycrylic 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 polycrylic 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.

公开(公告)号：US11725339B2

公开(公告)日：2023-08-15

申请号：US16788165

申请日：2020-02-11

Applicant: International Paper Company

Inventor： Angel Stoyanov ,  Joerg Endres ,  Holger Beruda ,  Ludwig Busam

IPC: D21C9/16 ,  D21C9/00 ,  D21H17/38 ,  B01J20/26

CPC classification number: D21C9/163 ,  B01J20/26 ,  D21C9/005 ,  D21H17/38

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.

公开(公告)号：US20250034807A1

公开(公告)日：2025-01-30

申请号：US18910085

申请日：2024-10-09

Applicant: INTERNATIONAL PAPER COMPANY

Inventor： Angel Stoyanov ,  Joerg Endres ,  Holger Beruda ,  Ludwig Busam

IPC: D21C9/16 ,  B01J20/26 ,  D21C9/00 ,  D21H17/38

Abstract: Bleached polycrylic acid crosslinked cellulose fibers with reduced furfurai content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfurai 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 polycrylic 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.