Environment-friendly white linen hydrogen peroxide bleaching process

Abstract

The invention provides an environment-friendly white linen hydrogen peroxide bleaching process. The process includes the following steps of firstly, conducting acid pickling and liquid discharging, wherein constant-temperature reaction is conducted for 15 min through acid liquid, sodium chlorite is added for temperature raising and heating, heat is preserved for 60 min, and liquid is discharged; secondly, conducting alkaline washing and liquid discharging, wherein alkaline liquid and hydrogen peroxide are mixed and blended, constant-temperature reaction is conducted for 60 min, and liquid is discharged; thirdly, conducting hydrogen peroxide bleaching, wherein hydrogen peroxide is added for temperature raising reaction for 30 min, constant-temperature washing and circulating are conducted for 10 min, overflowing is conducted for 19 min, and liquid is discharged. Non-secondary-chlorine chemicals are adopted, bleaching is not achieved through fluorescent agent, the product conforms to the current environment protection requirement and is more beneficial to human bodies, and meanwhile the technological process is shortened and energy is saved.

Description

technical field [0001] The invention belongs to the technical field of bleaching, and in particular relates to an environmentally friendly hydrogen peroxygen bleaching process for white linen. Background technique [0002] Flax fiber is a pure natural fiber with strong hygroscopicity, good heat dissipation and air permeability, anti-mildew and anti-moth, no static electricity, no chemical components, and unique characteristics of inhibiting bacterial growth and effectively blocking ultraviolet penetration. However, because the flax fiber exists in the form of bundles of fibers, although there are still a large amount of non-cellulose components such as pectin and lignin after the previous carding, which affects the spinning efficiency, the fibers need to be degummed before spinning. Treatment to increase fiber splitting, clean fibers, and enable smooth spinning of yarns. [0003] In the prior art, the traditional degumming process is to firstly treat flax roving with sodium...

AI Technical Summary

Problems solved by technology

Due to the high temperature and long time of oxygen bleaching, it will cause great damage to the fiber. At the same time, due to the high temperature, too much wax in the hemp fiber will be removed, which will cause the fiber to feel hard, which not only consumes time and electricity, but also causes an increase in production costs.

[0004] Chinese Patent No. 201110273595 discloses a patent titled "Flax Short Fiber Degumming and Bleaching Process". This patent also includes two process steps of pickling and sub-bleach