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A kind of preparation method of regenerated cellulose fiber that can be dyed without salt

A technology of regenerated cellulose and salt-free dyeing, which is applied in the fields of cellulose/protein conjugated rayon, fiber chemical characteristics, rayon manufacturing, etc. It can solve the problems of incomplete modification and complex process, and achieve adjustable properties. Controllable, good adsorption effect, and the effect of reducing production costs

Active Publication Date: 2018-08-07
JIANGSU GOLDSUN TEXTILE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in the process of cationizing regenerated cellulose fibers, there are problems such as incomplete modification, limited to the surface, complicated process, etc., and a kind of regenerated cellulose fibers that can be dyed without salt is proposed. The preparation method, in the method, in the process of preparing regenerated cellulose fibers, the cationic starch solution is mixed and spun with the spinning liquid by pre-spinning mixing or inter-spinning injection technology to prepare regenerated cellulose fibers, and a crosslinking agent is added in the process to make the regenerated cellulose fibers A cross-linking reaction occurs between the cationic starch and the cellulose macromolecular chain, making it fixed on the fiber macromolecular chain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of viscose spinning solution:

[0027] The raw material is cotton pulp with a degree of polymerization of 500-600, and its cellulose content is greater than 90%, and the glue is made according to the following process route: dipping, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and defoaming. The viscose spinning solution made according to the above-mentioned process has a cellulose content of 8.9%, a NaOH mass fraction of 6.0, a viscosity of (falling ball method) 59s, and a degree of maturity of (10%NH 4 Cl) 8.8ml.

[0028] Preparation of cationic starch solution:

[0029] In the reaction kettle, distilled water is used to prepare a cationic starch solution with a mass fraction of 10%, and a relatively uniform cationic starch solution can be obtained by fully stirring. Use a plate and frame filter to filter through double-layer fine cloth, and the pressure is below 0.2Mpa to obtain a uniform cationic starch solution.

[0030]...

Embodiment 2

[0042] Preparation of viscose spinning solution:

[0043] The raw material is hemp 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: dipping, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and defoaming. The viscose spinning solution made according to the above-mentioned process has a cellulose content of 8.8%, a NaOH mass fraction of 6.0, a viscosity of (falling ball method) 55s, and a degree of maturity of (10%NH 4 Cl) 8.7ml.

[0044] Preparation of cationic starch solution:

[0045] In the reaction kettle, distilled water is used to prepare a cationic starch solution with a mass fraction of 15%, and a relatively uniform cationic starch solution can be obtained by sufficient stirring. Use a plate and frame filter to filter through double-layer fine cloth, and the pressure is below 0.2Mpa to obtain a uniform cationic starch solution.

[0046]...

Embodiment 3

[0053] Preparation of viscose spinning solution:

[0054] The raw material is bamboo pulp with a degree of polymerization of 500-600, and its methyl fiber content is greater than 90%, and the glue is made according to the following process route:

[0055] The viscose spinning solution made according to the above-mentioned process has a cellulose content of 9.1%, a NaOH mass fraction of 5.9, a viscosity of (falling ball method) 59s, and a degree of maturity of (10%NH 4 Cl) 8.9ml.

[0056] Preparation of cationic starch solution:

[0057] In the reaction kettle, cationic starch solutions with mass fractions of 5%, 10%, 15%, 20%, and 25% were prepared with distilled water, and a relatively uniform cationic starch solution could be obtained by sufficient stirring. Use a plate and frame filter to filter through double-layer fine cloth, and the pressure is below 0.2Mpa to obtain a uniform cationic starch solution.

[0058] Mixing of viscose collagen solution and cationic starch s...

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Abstract

The invention relates to a raw material for the textile industry and a manufacturing method thereof, in particular to a method for preparing regenerated cellulose fibers that can be dyed without salt. In this method, in the process of preparing regenerated cellulose fibers, the cationic starch solution is mixed and spun with the spinning liquid by pre-spinning mixing or inter-spinning injection technology to prepare regenerated cellulose fibers, and a crosslinking agent is added in the process to make the cationic starch and A cross-linking reaction occurs between the cellulose macromolecular chains, making it fixed on the fiber macromolecular chains. The prepared regenerated cellulose fiber contains a large number of cationic groups, which has a better adsorption effect on the negatively charged dye matrix. There is no need to add electrolytes to promote dyeing during the dyeing process, which reduces production costs and saves energy. It also reduces the environmental pollution caused by excessive use of inorganic salts.

Description

technical field [0001] The invention relates to a raw material for the textile industry and a manufacturing method thereof, in particular to a method for preparing regenerated cellulose fibers that can be dyed without salt. Background technique [0002] Starch is a polysaccharide stored in the plant kingdom. It generally exists in the form of particles with a diameter of 1-10 microns or larger. These particles are mainly deposited in the seeds, tubers or roots of plants. Although starch sources are found throughout the plant world, only a few crops are widely used in the production of commercial starch. Corn is the main source of starch. Others include wheat, potato, cassava and sweet potato. Structurally speaking, starch is a kind of high polysaccharide, which is mainly formed by connecting the base rings of glucose residues through α-D-(1→4) bonds. [0003] Cationic starch is a starch ether derivative containing an amino group and a positive charge on the nitrogen atom th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08D01F8/02D01F8/18D01F1/10
Inventor 毛军陈红霞陆鹏丁可敬
Owner JIANGSU GOLDSUN TEXTILE SCI & TECH