Quick degumming method for low-alkali cotton stalk bark fibre in high temperature

Abstract

The invention discloses a fast colloid-removing method for high-temperature low-alkali cotton stack bark fiber. The technique flow thereof comprises: washing the cotton stack bark, drying, high-temperature low-alkali colloid-removing, washing, bleaching, washing, dehydrating, softening by applying oil, deoiling, drying and subtle drying of the cotton stack bark fiber, namely adopting the technique of boiling-bleaching-softening. The high-temperature high-pressure low-alkali technology is directly adopted to deeply degrade the hemicellulose and lignine in the cotton stack bark, and in the end hydrogen peroxiden is used for bleaching and softening the cotton stack bark fiber to prepare white and soft cotton stack bark fiber with high quality. The colloid removal rate of the cotton stack bark fiber after processing can achieve around 90%, and the removal rate of the hemicellulose content is around 97%. Compared with the disclosed patent technique of cotton stack bark fiber, as the invention adopts the technique of boiling-bleaching-softening, the processing period is greatly shortened; an orthogonal experiment is performed to control the alkaline amount to be the minimum and the colloid removal effect is optimum, thus saving resources and reducing discharge.

Description

technical field [0001] The invention relates to a degumming method, in particular to a high-temperature and low-alkali cotton stalk fiber rapid degumming method. Background technique [0002] Cotton stalk bark is a kind of good bast fiber, which is the main by-product fiber brought by planting cotton, accounting for about 30-35% of the total cotton stalk. In 2005, my country's cotton output surpassed that of the United States and ranked first in the world. And one mu of cotton field produces 225-250 kg of cotton stalks, and the skin part accounts for 26%, so the cotton stalk skin resources are extremely rich. In 2006, my country's total cotton output was 6.73 million tons, the actual total demand was 11.57 million tons, and the import volume had reached 3.64 million tons. Therefore, making full use of cotton stalk resources is of great significance to alleviate the serious shortage of cotton fibers in my country. But in the past people often used cotton stalk bark fiber a...

AI Technical Summary

Problems solved by technology

Although they made a positive step in using cotton stalk bark as textile materials, the method they adopted had the disadvantages of taking too long and using too much alkali. For example, the processing time in patent ZL94113220. The processing time in 200510034201.4 and 200610036594.7 also takes about 3 to 4 days, which brings many unfavorable factors to the application of cotton stalk fiber in textiles

Although the processing time of patents 200710066829.1 and 200710066830.4 is relatively reduced, the methods they use still have disadvantages such as complicated procedures and high energy consumption.