Method for preparing colored cellulose fiber

Abstract

The invention relates to a colored cellulose fiber and a preparation method thereof. The preparation method comprises the following steps: extruding a cellulose fiber spinning liquid by using a spinning jet, curing, tensioning, and washing with water to obtain water-washed yarns, wherein the water washing temperature is greater than or equal to 90 DEG C; further treating the water-washed yarns byusing a solution of a dye of 40-90 DEG C; finally carrying out rinsing and drying to obtain the colored cellulose fiber, wherein the rinsing temperature is 20-40 DEG C, and the dye comprises one or more of X, Y and Z groups; the X, Y and Z groups are correspondingly groups which can form covalent bonds with cellulose hydroxyl, groups which have self-crosslinking reactions, and groups which can form hydrogen bonds with cellulose hydroxyl. The mass of the dye in the colored cellulose fiber accounts for 0.1-0.5% of the mass of a cellulose fiber matrix, and the colored cellulose fiber is excellentin water washing resistance. The method provided by the invention is simple and feasible, and the colored cellulose fiber is good in durability.

Description

technical field [0001] The invention belongs to the technical field of colored fiber manufacture, and relates to a colored cellulose fiber and a preparation method thereof. Background technique [0002] Cellulose fiber has the advantages of natural and renewable resources, comfortable wearing, non-toxic hygiene, and degradable waste. Therefore, cellulose fiber has long been the mainstream raw material for textiles and is enduring. However, due to the limited output of natural cellulose fibers such as cotton and hemp, which cannot meet consumer demand, people often use natural cellulose materials such as cotton linters, wood, bamboo and straw as raw materials to prepare regenerated cellulose fibers, so as to achieve The purpose of effective utilization of natural materials and increasing the supply of cellulose fibers. With the development of consumer demand, people not only increase the demand for cellulose fiber, but also require a variety of fiber products, colors and sty...

AI Technical Summary

Problems solved by technology

[0003] At present, there are several methods for preparing colored cellulose fibers: one is the stock solution addition method, that is, dyes are added to the spinning solution, and colored fibers are prepared by spinning. This method is a common technical method for producing colored regenerated cellulose fibers. The effect is remarkable, but there are also disadvantages: 1) The dye is easy to remain in the spinning equipment and coagulation washing system, which affects the extrusion and forming of the fiber and the recycling of solvent; 2) The degree of dispersion and the amount of dye added to the mechanical properties of the fiber, etc. It will have adverse effects; 3) the batch replacement in production is inflexible, and there are many transition filaments, which increases production costs; the second is the fiber or fabric post-treatment method, which is common to both natural fibers and recycled fibers, and has the advantage that the batch size can be large or small 1. The production conversion is flexible and adaptable to many varieties, but the disadvantages are: 1) the general treatment method may cause poor durability; 2) when the fiber or fabric is dyed after finishing, it often affects the feel and softness of the fiber and fabric 3) The fiber microstructure of the finished product is dense, and the post-treatment mainly occurs on the fiber surface, and the dyes that can be added are limited, which affects the dyeing effect, or requires swelling or activation to improve reactivity, and Subsequent reactions or processing solvents still need to be processed, which undoubtedly increases the process and processing costs, etc.