抄録
In order to establish the bleaching process for cotton fabrics under the neutral condition, cotton fabrics were
bleached by hydrogen peroxide with urea. It was revealed that hydrogen peroxide bleaching with urea showed the
higher whiteness of bleached fabrics than that without urea at more than 70 degrees Celsius. Tensile strength did not decrease after
bleaching. Some radicals were observed by ESR measurement when urea was added into hydrogen peroxide aqueous
solution. The effects of urea on hydrogen peroxide bleaching seems to be caused by active oxygen ; hydroxyl radical, perhydroxyl radical and superoxide anion radical as well as perhydroxyl anion. The
residual hydrogen peroxide concentrations in bleaching baths were measured. When urea is added to the bleaching baths,
the decomposition of hydrogen peroxide is accelerated even in the neutral bath.
