Method for preparing viscose fiber

A viscose fiber and cellulose technology, applied in the field of cellulose fibers, can solve the problems of not being able to withstand the mercerization treatment to improve the appearance of the fabric, low wet strength and modulus, difficult to carry out continuously, etc., and achieve excellent physical and mechanical properties, high Strength and wet modulus, effect of improving filtration performance

Inactive Publication Date: 2008-01-16
CHTC HELON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zinc sulfate contained in the spinning wastewater in viscose fiber production has brought great pollution to the environment, seriously endangering people's health, and various methods of zinc wastewater treatment such as precipitation, resin treatment or dilution discharge method, etc., the treatment costs are high, and the discharge water quality indicators are also unstable
In order to solve this phenomenon, low-zinc spinning is currently used in factories, but when the zinc in the coagulation bath drops to 6g/l, the hook strength of the prepared fibers will be affected
And adopt zinc-free coagulation bath method to produce viscose fiber at present, although it has avoided the environmental pollution that zinc salt brings, the physical and mechanical property...

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

[0011] Add 55% (to α-cellulose weight) CS 2 Reacted for 1.5 hours, added 1.5% (relative α-cellulose weight) denaturant V315 in the dissolving process after cellulose xanthate, obtained viscose glue and was composed of: α-cellulose 8.20%, sodium hydroxide 5.8%, viscosity (falling ball method) 100s, maturity (10% NH 4 Cl value) 30.0ml, viscose spinning viscose with a high degree of esterification and a high degree of maturity of 50 degrees of esterification;

[0012] Wet molding is adopted, and a circular tantalum coating spinneret with a pore size of 55 μm is used. The coagulation bath process used for spinning molding: sulfuric acid 75g / l, aluminum sulfate 15g / l, sodium sulfate 390g / l, acid bath temperature 29 ℃, The immersion length of spinning is 75cm, and the cellulose xanthate is solidified and regenerated into cellulose fibers after spinning;

[0013] The total understretch ratio is 280%.

[0014] The refining desulfurization uses caustic soda, its concentration is 10g...

Embodiment 2

[0016] Adopt common wood pulp pulp, add 48% (alpha-cellulose weight) CS in the prepared alkali cellulose 2 Reacted for 1.6 hours, added 2.5% (relative α-cellulose weight) denaturant V318 in the dissolving process after the cellulose xanthate, obtained viscose glue composition: α-cellulose 8.8%, sodium hydroxide 4.8%, viscosity ( Falling ball method) 180s, maturity (10% NH 4 Cl value) 7.5ml, viscose spun viscose with a high degree of esterification and a high degree of maturity of 55 degrees of esterification;

[0017] Wet molding is adopted, and a Y-shaped yellow platinum anisotropic spinneret with a hole diameter of 50 μm is used.

[0018] The above-mentioned spinning stock solution is pressed into the coagulation bath through material. The coagulation bath process used for spinning forming: sulfuric acid 100g / l, aluminum sulfate 75g / l, sodium sulfate 360g / l, acid bath temperature 43°C, spinning immersion length 80cm, after spinning, cellulose xanthate is coagulated and reg...

Embodiment 3

[0022] Add 35% (to α-cellulose weight) CS 2 Reacted for 4.5 hours, added 2.0% (relative α-cellulose weight) denaturant V315 in the dissolving process after the cellulose xanthate, obtained viscose and was composed of: α-cellulose 6.40%, sodium hydroxide 4.8%, viscosity (falling ball method) 80s, maturity (10% NH 4 Cl value) 35.0ml, viscose spinning viscose with a high degree of esterification and a high degree of maturity of 53 degrees of esterification;

[0023] Wet molding is adopted, and a triangular tantalum coating spinneret with an aperture of 45 μm is used. The coagulation bath process used for spinning molding: sulfuric acid 70g / l, aluminum sulfate 20g / l, sodium sulfate 350g / l, acid bath temperature 32 ℃, spinning The immersion length of the silk is 73cm, and the cellulose xanthate is solidified and regenerated into cellulose fibers after spinning;

[0024] The understretch ratio of the nozzles, discs, third baths, and fourth baths is 180%;

[0025] The refining des...

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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PUM

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Abstract

The invention discloses a preparation method of viscose fibers, which is characterized in that the cellulose pulp is used in the viscous glue preparation procedure; the cellulose pulp together with an additional modifier are processed to cellulose xanthate with high esterification degree and ripeness degree; the spinning procedure is performed under such conditions as low coagulation bath temperature, low acidity and high sodium sulfate concentration, without using zinc sulfate which results in serious environmental pollution; the thickness of fiber skin is increased by drafting; and the produced viscose fiber has high strength and high wet modulus. The invention solves the problem of zinc pollution in the prior art, produces viscose fibers with high strength, high wet modulus, and good tension, and overcomes the disadvantages that the fabric is easy to deform, instable in size and nonresistant against base when the viscose fiber is in wet state. Compared with the prior viscose staple fibers, the fabric made of the inventive fibers is superior in high strength and good resistance against deformation and alkali.

Description

technical field [0001] The invention relates to a cellulose fiber technology, in particular to a preparation method of viscose fiber. Background technique [0002] The use of toxic and resource-poor zinc sulphate to produce viscose fiber is a major disadvantage in current manufacturing. The zinc sulfate contained in the spinning wastewater in viscose fiber production has brought great pollution to the environment, seriously endangering people's health, and various methods of zinc wastewater treatment such as precipitation, resin treatment or dilution discharge The treatment costs are relatively high, and the discharge water quality indicators are also unstable. In order to solve this phenomenon, low-zinc spinning is currently used in factories, but when the zinc in the coagulation bath drops to 6g / l, the hook strength of the prepared fibers will be affected. At present, the zinc-free coagulation bath method is used to produce viscose fiber, although it avoids the environme...

Claims

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Application Information

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IPC IPC(8): D01F2/10D01D1/02D01D5/06
Inventor 王乐军刘海洋姜明亮卢海蛟吕翠莲葛洪
Owner CHTC HELON
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