Preparation method of regenerated cellulose fiber subjected to cation grafting modification and salt-free dyeing

A technology of regenerated cellulose and cationic modifier, applied in the chemical post-processing of cellulose/protein man-made filaments, etc., can solve the problems of dye waste, uneven dyeing, increase process flow, etc., and achieve the effect of avoiding dye waste

Inactive Publication Date: 2015-04-22
JIANGSU GOLDSUN TEXTILE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing cationic graft-modified salt-free dyed regenerated cellulose fibers, which a...

Method used

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  • Preparation method of regenerated cellulose fiber subjected to cation grafting modification and salt-free dyeing
  • Preparation method of regenerated cellulose fiber subjected to cation grafting modification and salt-free dyeing
  • Preparation method of regenerated cellulose fiber subjected to cation grafting modification and salt-free dyeing

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Experimental program
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Embodiment 1

[0025] Cotton pulp with a degree of polymerization of 550 and a cellulose content of 95% was used to prepare a spinning viscose solution through successive processes of dipping, pressing, crushing, aging, yellowing, dissolving, filtering, and defoaming. During the dissolving process of cellulose, add a polypropylene oxide amine compound (condensed by epichlorohydrin and diethylenetriamine dicyandiamide) equivalent to 0.1% of methyl cellulose to obtain 8.0% of methyl cellulose, NaOH 6%, viscosity (falling ball method) 60s, maturity (10% NH 4 Cl) 17ml, viscose esterification degree is the cellulose xanthate spinning dope of 35; Adopt wet spinning procedure to spin. The spinneret specification is 20000 holes × 0.05mm, the spinning speed is 50m / min, and the coagulation bath is composed of: sulfuric acid 120g / L, sodium sulfate 300g / L, zinc sulfate 10g / L. The main indexes of the fiber prepared through the above steps are as follows: fineness 1.60dtex; dry strength 2.23CN / dtex; wet ...

Embodiment 2

[0027] Using wood pulp with a polymerization degree of 500 and a cellulose content of 92%, the spinning viscose solution is prepared through processes such as dipping, pressing, crushing, aging, yellowing, dissolving, filtering, and defoaming. In the pre-spinning injection process (relative to the spinning process), a polyepoxy cationic modifier equivalent to 6% of the methyl fiber is added to obtain a 8.0% methyl fiber, NaOH 6%, a viscosity (falling ball method) of 55s, and a maturity (10%NH 4 Cl) 18ml, viscose degree of esterification is the cellulose xanthate spinning stock solution of 40; Adopt wet spinning procedure to spin. The size of the spinneret is 20000 holes × 0.05mm, the spinning speed is 55m / min, and the coagulation bath composition is: sulfuric acid 100g / L, sodium sulfate 300g / L, zinc sulfate 12g / L. The main indexes of the fiber prepared through the above steps are as follows: fineness 1.52dtex; dry strength 2.3CN / dtex; wet strength 1.48CN / dtex; dry elongation ...

Embodiment 3

[0031] The bamboo pulp with a degree of polymerization of 570 and a cellulose content of 94% is used to prepare a spinning viscose solution through successive processes of dipping, pressing, crushing, aging, yellowing, dissolving, filtering, and degassing. In the post-dissolving process of cellulose, add the modified chitosan equivalent to 12% of methyl cellulose to obtain 8.9% of methyl cellulose, 5.8% of NaOH, viscosity (falling ball method) 50s, maturity (10% NH 4 Cl) 16ml, viscose esterification degree is the cellulose xanthate spinning dope of 38; Adopt wet spinning procedure to spin. The size of the spinneret is 20000 holes × 0.05mm, the spinning speed is 50m / min, and the coagulation bath composition is: sulfuric acid 110g / L, sodium sulfate 280g / L, zinc sulfate 10g / L. The main indexes of the fiber prepared through the above steps are as follows: fineness 1.64dtex; dry strength 2.14CN / dtex; wet strength 1.38CN / dtex; dry elongation 16.8%.

[0032] The modified chitosan st...

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Abstract

The invention discloses a preparation method of regenerated cellulose fiber subjected to cation grafting modification and salt-free dyeing, which adopts cellulose pulp as a main raw material, and orderly comprises the following procedures of dipping, squeezing, crushing, aging, yellowing, dissolving, filtering, defoaming, spinning, post-treatment, and drying; a cellulose cation modifier is added in the dissolving procedure or the spinning procedure; the cellulose cation modifier is one or a mixture of more than one of an amination reagent, a quaternization reagent, a azetidine cation compound, and a modified natural cation reagent. Therefore, the method of the invention prevents the disadvantages of dye waste, uneven dyeing, and the like caused by the adoption of dyes with multiple active groups, and also prevents the problem of process flow increasing caused by the adoption of a pretreatment mode.

Description

technical field [0001] The invention relates to a modified regenerated cellulose fiber made by adding substances to spinning solution and its preparation method Background technique [0002] The annual wastewater discharge of my country's textile industry ranks sixth among all industries. The printing and dyeing industry is also a major wastewater discharger in the textile industry. About 400 million tons of wastewater are discharged every year. The government spends a lot of money on sewage treatment every year. Promoting energy conservation and emission reduction policies is an inevitable choice for building a resource-saving and environment-friendly society. [0003] At present, cellulose fiber dyeing is carried out in aqueous solution, and the dyes used are mainly anionic reactive dyes, which are ionized during dyeing. When dyeing cellulose fiber textiles, reactive dyes are combined with cotton fibers through covalent bonds, which fundamentally solves the problem of poo...

Claims

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Application Information

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IPC IPC(8): D01F11/02
Inventor 胡青青陈红霞陆鹏
Owner JIANGSU GOLDSUN TEXTILE SCI & TECH
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