抄録
It is well known that nylon fibers turn yellow during long storage in a wood box or corrugated carton because of the reaction of the fibers with the aromatic aldehyde contained in the crude paper or wood. In our previous paper, a protective reaction of the amino groups in nylon fibers by a reducing sugar in organic solvents prevented them from turning yellow caused by vanillin, which is one of the aromatic aldehydes. In this paper, the same reactions were performed in an aqueous solution, which is generally very safe and useful for industrial applications, including these for various environmental problems. Interestingly, the reaction of nylon 6 fibers with a reducing sugar in an aqueous solution containing a reducing reagent such as sodium hydrosulfite prevented their color from changing to brown due to a melanoidin reaction, and the obtained nylon 6 fibers exhibited good anti-yellowing effects against vanillin.
