Fast decorizing and whitening method of color feather and down

Abstract

The present invention is fast decolorizing and whitening method of color feather and down. FeSO4 is adopted as the bleaching activator for oxygen bleaching decolorizing of color feather and down at 20-25 deg.c, and dilute hydrochloric acid solution is then used in reducing Fe3+ ion before clear water washing. The present invention has simple technological process, and can decolorize color feather and down effectively, and the treated feather and down is fluffy and has the original state maintained and no damage.

Description

technical field [0001] The invention relates to a method for rapid decolorization and whitening of colored feathers and down. Background technique [0002] Feather belongs to protein fiber, and the surface of feather fiber is covered with a layer of cell membrane composed of water-insoluble sterols, waxes and triphosphates, all of which are insoluble organic matter in water, and there are many gaps and cavities inside feather fiber, making feather The density of the feather is very small, and these are the factors that cause the difficulty of decolorization of colored feathers. [0003] At present, my country mainly uses alkali method to decolorize colored feathers and eider down, as disclosed in the "Colored Feather Decolorization Research" article in the 1st issue of "Jiangsu Chemical Industry" magazine in 1991, using 0.5% lye to soak feathers for 24 hours, 1 %H 2 o 2 Soaking for 16-18 days is said to achieve feather decolorization, but this process is not suitable for l...

AI Technical Summary

Problems solved by technology

[0003] At present, my country mainly uses alkali method to decolorize colored feathers and eider down, as disclosed in the "Colored Feather Decolorization Research" article in the 1st issue of "Jiangsu Chemical Industry" magazine in 1991, using 0.5% lye to soak feathers for 24 hours, 1 %H 2 o 2 Soaking for 16-18 days is said to achieve feather decolorization, but this process is not suitable for large-scale industrial production

In August 2003, Volume 20, Issue 4, "Wool Spinning Science and Technology", the article "Research on the Decolorization and Bleaching of Gray Down" disclosed that the use of 5.0-7.5mol / l HO, liquor ratio 1:40, and pH=9 medium , the method of decolorizing at a temperature of 25°C for 5 hours. The actual experiment shows that this method must be washed down. The down has certain damage. The decolorization cannot reach the ideal whiteness and it is prone to yellowing. Long pieces of black feathers can only be decolorized to light yellow, and the melanin cannot be removed