REDUCED FURFURAL CONTENT IN POLYACRYLIC ACID CROSSLINKED CELLULOSE FIBERS

摘要

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.

主权项

1. A method of reducing the furfural content of polyacrylic acid crosslinked cellulosic fibers, the method comprising applying hydrogen peroxide alone, in a bleaching stage subsequent to a curing stage, to polyacrylic acid crosslinked cellulosic fibers, in an amount of from about 0.1 to about 20 pounds (about 0.045 to about 9.07 kg) per ADMT of fiber and at a pH of between about 4.5 and 5, wherein the amount of furfural in the treated crosslinked fibers reduces from a first value determined at least one day after the treatment of the crosslinked fibers to a second, subsequent value determined up to 21 days after treatment.