High strength viscose and preparation method thereof

Abstract

The invention discloses high strength viscose and a preparation method thereof. The viscose satisfies the following conditions: the dry breaking strength is not less than 3.10cN / dtex; the wet breaking strength is not less than 1.6cN / dtex; the dry elongation at break is 14.0-19.0%. The preparation method comprises the following processes: synthesizing modified melamine formaldehyde resin as a reinforcing agent, then rapidly blending the modified melamine formaldehyde resin with a viscose solution and adopting conventional spinning technology to prepare the high strength viscose. The preparation method of the high strength viscose, which is provided by the invention, is simple in process operation and has the effect of solving the problem of poor compatibility of the melamine formaldehyde resin and the viscose. The viscose prepared by the method has greatly improved strength than common viscose and has a good application prospect.

Description

technical field [0001] The invention belongs to the innovation in the technical field of cellulose viscose fiber, and in particular relates to a high-strength viscose fiber and a preparation method thereof. Background technique [0002] Viscose fiber has a series of valuable physical and mechanical properties and properties that meet hygienic requirements. As a regenerated cellulose fiber, its biggest feature is that it has some properties very similar to cotton fiber, comfortable to wear, good spinnability, and its fineness and length can be adjusted according to the application, so it is widely welcomed. However, the strength of ordinary viscose fiber is relatively low, and it swells in wet state, the strength decreases obviously, and the dimensional stability is poor, which affects the wearing performance of the fabric. Therefore, it is of great significance to improve the properties of viscose fibers by blending and other methods, and to prepare new varieties of viscose...

AI Technical Summary

Problems solved by technology

[0003] For the research on reinforced viscose fiber, many patents are involved. For example, Chinese patent CN101775671A discloses a high-strength viscose fiber and its production method, which is characterized in that the flake bacterial cellulose is pretreated and crushed by ball milling to obtain Nano-scale bacterial cellulose powder, and then mix it with viscose spinning solution to make high-strength viscose fiber, but the method is cumbersome and time-consuming, and is not suitable for mass production, and the bacterial cellulose The powder particles are mixed unevenly with the viscose spinning solution, which is easy to affect the performance of the fiber; Chinese patent CN103255488A discloses a method of using inorganic nano-whiskers or organic nano-whiskers to disperse through the dispersion liquid and blend with the viscose collagen solution to prepare high-strength fibers. The method of viscose fiber, but inorganic nano whiskers or organic nano whiskers and cellulose are only purely physically blended, the compatibility of the two is poor, there is a serious loss problem in the spinning forming process, and the reinforcing effect is not very good Good; Chinese patent CN104233510A discloses a kind of amino resin reinforced cellulose fiber and its preparation method, which adopts benzo-melamine instead of part of melamine to react with formaldehyde, and simultaneously uses small molecule monofunctional alcohols as end-capping agent to synthesize melamine-formaldehyde resin, Then it is blended with viscose solution and spun. The resin synthesized by this method is mostly a low molecular weight compound based on a single molecule, which is difficult to form intersections with cellulose molecules, and the melamine formaldehyde resin has poor compatibility with cellulose molecules. achieve enhanced effect