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Method for producing visose fibre by non-zine solidification bathing

A viscose fiber and coagulation bath technology, applied in the field of man-made cellulose fiber production, can solve the problems that the content of coagulation bath components cannot be controlled, the effect of zinc ions cannot be achieved, and the human body is harmful, and the production process is easy to control, The fiber section is uniform and smooth, and the effect of protecting the environment

Active Publication Date: 2007-09-05
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing information introduces the use of Mg 2+ , Fe 2+ and AL 3+ Do substitution experiments, however, the substitution of metal ions to produce fibers does not achieve the effect of zinc ions, and there is also a certain degree of environmental pollution
There are also organic compounds used as substitutes, such as formaldehyde, hydroxypolyurethane, etc., but toxic organic substances are more harmful to the human body, and the content of coagulation bath components should not be controlled at the same time

Method used

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  • Method for producing visose fibre by non-zine solidification bathing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add PEG-1600 with 2% A-cellulose content to the yellowed viscose, dissolve, mix and filter to obtain evenly mixed viscose, and ripen and defoam at room temperature for 8 hours at 17-18°C , to prepare spinning glue, methyl fiber: 8.6%, alkali content: 5.0%, viscosity: 40s, maturity: 16ml.

[0013] Coagulation bath: sulfuric acid 110-112g / l, sodium sulfate 240-250g / l, temperature 40-42°C, additive S653 content 1‰;

[0014] Spinning process: nozzle draft 56%, disc draft 23%, plastic draft 10%

[0015] Fiber index:

[0016] Dry breaking strength: 2.43cN / dtex

[0017] Wet breaking strength: 1.43cN / dtex

[0018] Dry elongation at break: 18.0%

[0019] Linear density deviation rate: -3.2%

[0020] Length deviation rate: -0.30%

[0021] Extra long fibers: 0%

[0022] Double-length fiber: 0mg / 100g

[0023] Residual sulfur content: 6.2mg / 100g

[0024] Defect: 0mg / 100g

[0025] Dry strength coefficient of variation (CV): 16.37%

[0026] Whiteness: 79%

[0027] Oil cont...

Embodiment 2

[0030] Add the melted AC1815 with 1% p-A cellulose content to the yellowed viscose, dissolve, mix and filter to obtain a uniformly mixed viscose, and ripen and defoam at a room temperature of 17-18°C8 Hours, the spinning glue was prepared, methyl fiber: 8.6%, alkali-containing: 5.0%, viscosity: 42s, maturity: 15ml.

[0031] Coagulation bath: sulfuric acid 110-112g / l, sodium sulfate 240-250g / l, temperature 40-42°C, additive S653 content 0.2‰, urea content 0.5‰;

[0032] Spinning process: nozzle draft 56%, disc draft 23%, plastic draft 10%;

[0033] Obtained viscose staple fiber index:

[0034] Dry breaking strength: 2.42cN / dtex

[0035] Wet breaking strength: 1.39cN / dtex

[0036] Dry elongation at break: 19.0%

[0037] Linear density deviation rate: -2.2%

[0038] Length deviation rate: -0.30%

[0039] Extra long fibers: 0%

[0040] Double-length fiber: 0mg / 100g

[0041] Residual sulfur content: 6.2mg / 100g

[0042] Defect: 0mg / 100g

[0043] Dry strength coefficient of...

Embodiment 3

[0048] Add melted AC1815 with 1.5% para-A cellulose content and 0.5% V315 to the yellowed viscose, dissolve, mix, and filter to obtain a uniformly mixed viscose at room temperature at 18~19°C After maturing and degassing for 15 hours, the spun gel was obtained, which had a fiber content of 8.2%, an alkali content of 5.8%, a viscosity of 38 s, and a maturity of 9.6 ml.

[0049] Coagulation bath: sulfuric acid 100~102g / l, sodium sulfate 240~250g / l, temperature 45~56℃, additive S653 content 1‰polyoxyethylene ether content 0.5‰.

[0050] Spinning process: nozzle draft -2.12%, disc draft 15.38%;

[0051] Obtained viscose filament index:

[0052] Dry breaking strength: 2.24cN / dtex

[0053] Wet breaking strength: 0.98cN / dtex

[0054] Dry elongation at break: 19.2%

[0055] Coefficient of variation (CV value) of dry elongation at break: 6.20%

[0056] Linear density (fineness) deviation: -4.0%

[0057] Linear density coefficient of variation (CV value): 3.0%

[0058] Twist vari...

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Abstract

The invention discloses the method used non zinc coagulating bath to produce viscose fiber. It is as follows: adding denaturant in first dissolving phase to improve filtrability of viscose, prolong forming speed, and increase forming uniformity to reduce about 20%-40% spinning nozzle exchanging ratio; not using zinc sulfate in spinning step to protect environment. The production technique is easy to control. And its cost is low. The formed viscose fiber has good hydroscopic and dyeing property. And its all physical index can reach the GB demand. And it has doughnut fiber function.

Description

technical field [0001] The invention relates to a method for producing artificial cellulose fibers, in particular to a process technology for producing viscose fibers in a zinc-free coagulation bath. Background technique [0002] At present, viscose fiber production plants all adopt low-zinc (8-12g / l) coagulation acid bath spinning, and the use of toxic zinc sulfate is the biggest shortcoming of producing viscose fiber. Spinning wastewater from viscose fiber production contains zinc sulfate, which pollutes the environment and endangers people's health. In order to improve this situation, people are studying to find substitutes for zinc sulfate, and the zinc-free spinning method is used to reduce environmental pollution. Existing information introduces the use of Mg 2+ , Fe 2+ and AL 3+ Do substitution experiments, however, the substitution of metal ions to produce fibers does not achieve the effect of zinc ions, and there is also a certain degree of environmental polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/06
Inventor 田素峰王乐军马君志
Owner 潍坊欣龙生物材料有限公司
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