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A kind of preparation method of regenerated cellulose fiber dyeable by natural dye

A technology of regenerated cellulose and natural dyes, applied in the field of textile raw materials, can solve problems such as substandard color fastness, poor color fastness, complicated process, etc., and achieve improved color fastness indicators, improved color fastness, and good antibacterial performance Effect

Active Publication Date: 2020-02-21
JIANGSU GOLDSUN TEXTILE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the use of natural dyes to dye regenerated cellulose fibers has many advantages, such as safety and environmental protection, ecological non-toxicity, etc. At present, when natural dyes are used to dye and print regenerated cellulose fibers, there are still problems of substandard color fastness. problem, although much research has been done on this
Wherein the application number is: the patent of CN201610050735.4, utilizes the extracted natural lavender dye to dye the regenerated cellulose fiber after modification, obtains better dye uptake rate and color fastness, but this method process is loaded down with trivial details, and cost is higher , the main problem is to modify the regenerated cellulose fibers before they can be dyed; the patent application number CN201610050277.4 discloses a method for dyeing regenerated cellulose fibers with Radix isatidis dyes, the method is also to first dye the regenerated cellulose fibers Modification, dyeing with natural dyes to obtain better dye uptake and various color fastnesses, still has the problem of high cost and complicated process. Therefore, there is no complete solution to the regeneration of natural dyes. Cellulose fiber has the problems of low dye uptake, poor color fastness, high cost, and long processing process, so a technological breakthrough is urgently needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the dyeable regenerated cellulose fiber of embodiment 1 natural dye

[0023] Step 1, the preparation of viscose spinning solution

[0024] The raw material is wood pulp with a polymerization degree of 500-600, and its cellulose content is greater than 90%, and the glue is made according to the following process route: impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and defoaming.

[0025] The viscose spinning solution made according to the above-mentioned process has a cellulose content of 9.0%, a NaOH mass fraction of 5.8%, a viscosity of (falling ball method) 60s, and a degree of maturity of (10%NH 4 Cl) 8.9 mL.

[0026] Step 2, viscose spinning solution-chitosan mixed solution

[0027] In the reaction kettle, a chitosan solution with a mass fraction of 10% was prepared with distilled water, and then the viscose spinning stock solution was added according to the ratio of the mass of chitosan to 10% of...

Embodiment 2

[0031] Embodiment 2: the preparation method of the regenerated cellulose fiber dyeable with natural dye

[0032] Step 1, the preparation of viscose spinning solution

[0033] The raw material is wood pulp with a polymerization degree of 500-600, and its cellulose content is greater than 90%, and the glue is made according to the following process route: impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and defoaming.

[0034] The viscose spinning solution made according to the above-mentioned process has a cellulose content of 9.0%, a NaOH mass fraction of 5.8%, a viscosity of (falling ball method) 60s, and a degree of maturity of (10%NH 4 Cl) 8.9 mL.

[0035] Step 2, viscose spinning solution-chitosan mixed solution

[0036] In the reaction kettle, a chitosan solution with a mass fraction of 15% was prepared with distilled water, and then the viscose spinning stock solution was added according to the ratio of the mass of chitosan to 15%...

Embodiment 3

[0040] Embodiment 3: the preparation method of the regenerated cellulose fiber dyeable with natural dye

[0041] Step 1, the preparation of viscose spinning solution

[0042] The raw material is wood pulp with a polymerization degree of 500-600, and its cellulose content is greater than 90%, and the glue is made according to the following process route: impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and defoaming.

[0043]The viscose spinning solution made according to the above-mentioned process has a cellulose content of 9.0%, a NaOH mass fraction of 5.8%, a viscosity of (falling ball method) 60s, and a degree of maturity of (10%NH 4 Cl) 8.9 mL.

[0044] Step 2, viscose spinning solution-chitosan mixed solution

[0045] In the reaction kettle, a chitosan solution with a mass fraction of 20% was prepared with distilled water, and then the viscose spinning stock solution was added according to the ratio of the chitosan mass to 20% of ...

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Abstract

Disclosed is a method for preparing a regenerated cellulose fiber which is dyeable with a natural dye, comprising firstly adding a chitosan solution to a viscose spinning solution to prepare a viscose spinning solution-chitosan mixed solution, then adding a tannic acid solution, mixing and then fully reacting same, and finally subjecting the resulting tannic acid viscose spinning solution to wet spinning so as to prepare the regenerated cellulose fiber which is dyeable with a natural dye. After dyeing the prepared regenerated cellulose fiber with a natural dye, yarns or fabrics prepared with the fiber have better various color fastnesses, and can satisfy production and apparel use requirements.

Description

technical field [0001] The invention belongs to the technical field of textile raw materials, and in particular relates to a preparation method of regenerated cellulose fibers dyeable by natural dyes. Background technique [0002] Regenerated cellulose fiber is a regenerated fiber made of natural cellulose through a series of complex chemical and physical changes. Applicability, in addition, its drapability is far better than textiles made of cotton and linen. Its use covers almost all aspects of industry, agriculture, and daily clothing, and it is one of the important raw materials for the textile industry. [0003] Because regenerated cellulose has so many advantages, it has become more and more popular among consumers in recent years. Whether it is dyed or printed with reactive dyes, it has unique characteristics in terms of color fastness, gloss and vividness. Advantage. At the same time, because regenerated cellulose fiber has better crystallinity than natural cellul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08D06P1/34
CPCD01F2/08D06P1/34
Inventor 毛军陈红霞陆鹏袁洪兵
Owner JIANGSU GOLDSUN TEXTILE SCI & TECH