Reduced furfural content in polyacrylic acid crosslinked cellulose fibers used in absorbent articles

US9205405B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Jörg Endres · Frankfurt am Main, DE
• Holger Beruda · Schwalbach, DE
• Ludwig Busam · Idstein, DE
• Angel Stoyanov · Federal Way, US

Key dates

• Filing date: May 6, 2014
• Grant date: Dec 8, 2015
• Expiry date: Aug 6, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L2300/11
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Absorbent articles comprising 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.