Viscose producing process based on hemp pulp

Abstract

The invention relates to the technical field of textile production processes, in particular to a viscose producing process based on hemp pulp. The viscose producing process includes the following steps of firstly, preparing raw materials, wherein the hemp type raw materials are collected for use; secondly, preparing the hemp pulp, wherein the hemp type raw materials prepared in the first step aresubjected to enzyme cold piling, oxygen rinsing, washing and drying treatment to prepare the hemp pulp; thirdly, preparing viscose, wherein the hemp pulp prepared in the second step is subjected to pulverizing, sulfonating, dissolving, ripening, spinning, drafting, refining desulphurization and drying treatment to obtain the viscose. The production process is simple, mild in condition, environmentally friendly and capable of saving energy; the produced viscose is large in specific surface area, the dye-uptake and elongation at break of the fiber can be increased, the viscose is good in antibacterial property, the antibacterial property of the viscose can be kept to be 70-80% of that of original hemp, and the textile fabric is higher in drape factor and softer and more smooth in handfeel.

Description

technical field [0001] The invention relates to the technical field of textile production technology, in particular to a production technology of viscose fiber based on hemp pulp. Background technique [0002] Regenerated cellulose fiber, namely viscose fiber, is made of natural cellulose (cotton, hemp, bamboo, tree, shrub, etc.) Good regenerated cellulose fibers. Its structure is similar to cotton, the difference is that its hygroscopicity and air permeability are better than cotton fibers, it can be said that it is the best hygroscopicity and air permeability of all chemical fibers, known as "breathing fabric" . At the same time, it also has some advantages of silk that cotton fiber does not have. Therefore, it is more comfortable to wear; the beauty of dyeing is better than that of cotton fiber; the hand feels soft, plump and smooth, with excellent drape and silk-like luster; high thermal stability and light stability, no static electricity; strength and elongation can...

AI Technical Summary

Problems solved by technology

But there are following disadvantages, the first is to cut off the bast fiber at the root and the bast fiber at the tip of the hemp evenly, the preparation steps of the raw material are relatively complicated, and the production efficiency is low; The damage to cellulose and hemicellulose is relatively large; the third is that the hemp is not pretreated before cooking, and the amount of alkali used is large, which will cause slight damage to the molecular chain of the cellulose crystal, resulting in a decrease in the ordered cellulose structure , the crystallinity of cellulose will also decrease, which will lead to high COD value of the discharged waste liquid, which is not conducive to environmental protection. At the same time, because the crystallization area of ​​hemp fiber is more than that of ordinary natural fiber, it is difficult for some additives to penetrate into the fiber , leading to a small specific surface area of ​​the fiber, and poor adsorption of the auxiliary agent in the subsequent fiber, which will result in a small specific surface area of ​​the spun viscose fiber, low dye uptake, low elongation at break of the fiber, and poor toughness

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