Preparation of coloured antibiotic viscose fiber

Abstract

The invention relates to a preparation method for colored antibacterial viscose fiber, which consists of the following steps: (1) formulating the vat dyes of one or a plurality of colors into a paste respectively by alkaline solution according to the coloring requirements of fibers, and then adding hydrosulfite and stirring for reacting and generating vat dye leuco salt solution, mixing the vat dye leuco salt solution of a plurality of colors according to the color matching proportion; or formulating the vat dyes of a plurality of colors into a paste by alkaline solution after mixing according to the color matching proportion, then adding the hydrosulfite for generating vat dye leuco salt mixed solution, (2) fully mixing the nanometer silver powder having the particle size no more than 100 nm with the colloid mixture to formulate a nanometer silver colloid water solution containing 2-5 percent of nanometer silver and 4-10 percent of colloid protective agent, (3) mixing the two solutions prepared by step (1) and step (2) and adding the mixed solution into the raw material solution of viscose rayon in any phase of the aging process of the viscose to spin, refine and dry, thus preparing the colored antibacterial viscose fiber.

Description

technical field [0001] The invention relates to a preparation method of viscose fiber, in particular to a preparation method of colored antibacterial viscose fiber. Background technique [0002] With the development of society and the continuous improvement of people's living standards, people's awareness of self-health is increasing, and more and more fiber products are required to be colorful, beautiful and practical, and also have antibacterial and anti-mildew functions. [0003] Viscose fiber, as a kind of fiber variety regenerated from natural cellulose fiber through a series of chemical treatments, is widely used in clothing, household products, medical and health and other fields due to its good moisture absorption and air permeability. Colored varieties are generally produced by the post-spinning coloring process, which not only has high production costs, but also causes problems such as uneven color and poor color fastness due to the quality of rayon products and fl...

AI Technical Summary

Problems solved by technology

[0003] Viscose fiber, as a kind of fiber variety regenerated from natural cellulose fiber through a series of chemical treatments, is widely used in clothing, household products, medical and health and other fields due to its good moisture absorption and air permeability. Colored varieties are generally produced by the post-spinning coloring process, which not only has high production costs, but also causes problems such as uneven color and poor color fastness due to the quality of rayon products and fluctuations in the dyeing and finishing process during the dyeing process, and the dyeing During the process, a large amount of dyeing and finishing wastewater is produced, polluting the environment

A small number of enterprises produce colored antibacterial viscose fibers through pre-spinning dyeing. Although the products have uniform color, high color fastness, low production cost and no pollution, the water-soluble dyes used will diffuse into the acid bath during the production process. Contamination of acid bath, color loss during scouring, contamination of lotion, and poor resistance to oxygen and chlorine bleaching, so it has not been able to be promoted in large-scale production

And when some acid and alkali resistant and oxygen, chlorine bleaching pigments and poor water-soluble dyes are used as raw materials for coloring before spinning to produce colored antibacterial viscose fibers, due to the pigments and poor water-soluble dyes in the viscose fibers are divided into particles, The colored antibacterial viscose fiber produced has poor shade and poor hand feeling, and the scope of use is greatly limited. It cannot replace colored fibers produced by conventional dyeing and finishing processes in large quantities, so it cannot be mass-produced

[0004] At this stage, there is no viscose fiber with antibacterial function and bright and rich colors, so the added value of its products cannot be greatly improved