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Xanthating method used in viscous fiber production

A technology of viscose fiber and cellulose xanthate, which is applied in the field of textile products, can solve the problems of severe yellowing side reactions, increased free lye, and high load of yellowing machines, and achieves improved yellowing reactions, simple process, and The effect of large viscose particles and less

Inactive Publication Date: 2005-05-25
BAODING SWAN NEW FIBER MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the wet yellowing process, the cellulose xanthate formed swells and partially dissolves, making the material in the late stage of the reaction jelly-like, with high viscosity and high load on the yellowing machine.
In addition, due to the increase of free lye, the yellowing side reaction is more severe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Equipment used: Vacuum yellowing kneading and dissolving machine

[0016] Alkali cellulose: α-cell: 32.5%, NaOH: 15%.

[0017] Yellowing process: Yellowing time: 40 minutes for dry method, 40 minutes for wet method; Yellowing temperature: Initial temperature for dry method: 23°C, final temperature: 27°C; Initial temperature for wet method: 27°C, final temperature: 30°C ; CS 2 Dosage: 34.5% (for α-cell); 80g / L alkalization solution concentration; 85% total lye addition for wet yellowing, and add the rest when dissolving cellulose xanthate after yellowing. Dissolving temperature: 16°C; time: 60 minutes;

[0018] Viscose composition: α-cell: 8.1%, NaOH: 5.7%. S: 2.3%

[0019] Glue particle number distribution: >8.8μ: 1769, >10.5μ: 1080, >16μ: 403, >21μ: 188, >31μ: 48, >41μ: 6. Filtration value Kw: 112, degree of esterification: 48.3%

[0020] Viscose filament physical and chemical indicators: variety 133.3dtex / 30f, dry strength: 2..18CN / dtex, wet strength: 1.09CN / dte...

Embodiment 2

[0022] Equipment used: Vacuum yellowing kneading and dissolving machine

[0023] Alkali cellulose: α-cell: 28%, NaOH: 18%.

[0024] Yellowing process: Yellowing time: 30 minutes for dry method, 50 minutes for wet method; Yellowing temperature: Initial temperature for dry method: 24°C, final temperature: 26°C; Initial temperature for wet method: 26°C, final temperature: 29°C ; CS 2 Dosage: 36% (for α-cell); concentration of alkalization solution 90g / L; dosing amount for wet yellowing 80% (total lye for yellowing), and the balance is for cellulose yellow acid after yellowing Add when ester dissolves. Dissolving temperature: 13°C; time: 60 minutes

[0025] Viscose composition: α-cell: 8.5%, NaOH: 6%. S: 2.3%

[0026] Viscose particle number distribution: >8.8μ: 1730, >10.5μ: 1060, >16μ: 360, >21μ: 154, >31μ: 55, >41μ: 8. Filtration value Kw: 109.9, degree of esterification: 46.9%

[0027] Viscose filament physical and chemical indicators: 83.3dtex / 18f, dry strength: 2.06CN...

Embodiment 3

[0029] Equipment used: Vacuum yellowing kneading and dissolving machine

[0030] Alkali cellulose: α-cell: 35%, NaOH: 17%

[0031] Yellowing process: Yellowing time: dry method 35 minutes, wet method: 60 minutes; yellowing temperature: dry method initial temperature: 22 ℃, final temperature 25 ℃; wet method initial temperature: 25 ℃, final temperature: 30 ℃; CS 2 Dosage: 33% (to α-cell); alkalization solution concentration 85g / L; wet yellowing dosing 83% (total lye dosing for yellowing) and the balance after the yellowing is finished, to cellulose yellow acid Add when ester dissolves. Dissolving temperature: 18°C; time: 70 minutes.

[0032] Viscose composition: α-cell: 7.6%, NaOH: 5.8%. S: 2.25%

[0033] Viscose particle number distribution: >8.8μ: 1690, >10.5μ: 890, >16μ: 405, >21μ: 186, >31μ: 55, >41μ: 7. Filtration value Kw: 108.6, degree of esterification: 48.2%

[0034] Viscose filament physical and chemical indicators: variety 333.3dtex / 60f, dry strength ≥ 2.16CN / ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A yellowing method used in preparing viscose fibres includes such steps as dry yellowing between alkaline fibres and CS2, adding alkali solution to alkali cellulose, and wet yellowing. Its advantages are high yellowing effect, short time, less energy consumption, and less by-product.

Description

technical field [0001] The invention relates to a preparation method of textiles, in particular to a yellowing method in the production process of viscose fibers, belonging to the technical field of textile products. technical background: [0002] The production of viscose fiber is completed through various processes such as impregnation, aging, yellowing, dissolution, filtration, aging, and spinning. Among them, the purpose of yellowing process is to make alkali cellulose and CS 2 Carry out yellowing reaction to make cellulose xanthate, and dissolve it to make viscose. The yellowing process is an important link in the whole viscose fiber production. In recent years, viscose fiber production technology has been continuously improved and perfected, and a relatively complete technological system has been formed. At present, for the yellowing technology in the production process of viscose fiber, there are mainly two methods used at home and abroad, namely dry yellowing and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): C08B9/00
Inventor 王三元鹿红岩张志宏田文智陈艳玲
Owner BAODING SWAN NEW FIBER MFG CO LTD
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