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A kind of production method of superfine high-strength high-modulus viscose fiber

A high-strength, high-modulus, viscose fiber technology, used in viscose-made rayon, wet spinning, stretch spinning, etc. It is difficult to cooperate and the quality of spun viscose is not easy to control, so as to achieve the effect of increasing the contact area and forming speed, improving strength, fiber strength and modulus

Inactive Publication Date: 2011-12-28
CHTC HELON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are mainly used in composite fibers and synthetic fibers, etc., and the fineness is mostly ≥0.89dtex. According to the definition of fine denier fibers in my country, they are fine denier fibers, and it is difficult to meet the ultrafine denier fiber standards required by my country.
The latest ultra-fine denier fiber Micro Modal AIR developed by the Austrian Lenzing Group also has a diameter of 0.8dtex. Due to the long production cycle and complicated process of producing viscose fiber by the viscose method, the quality of spinning viscose is not easy to control. The bath liquid is mostly high-acid, high-salt, high-temperature, low-zinc spinning bath liquid, which leads to more difficulties in the forming process and drafting coordination during spinning. Therefore, the ultrafine viscose fiber spinning process below 0.89dtex is fresh There are reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Production of 0.56dtex ultra-fine high-strength high-modulus viscose fiber

[0019] Mix cotton pulp and wood pulp in a weight ratio of 30:70 to prepare cellulose xanthate high polymer spinning viscose, the composition of which is: α cellulose 8.9±0.1%, sodium hydroxide 4.8±0.1%, viscosity ( Falling ball method) 45±3s, maturity (10%NH 4 Cl value) 16±2ml.

[0020] After the prepared spinning viscose is filtered before spinning, it is ejected through a composite spinneret that is respectively provided with a viscose ejection hole and a coagulation bath ejection hole, and is solidified and formed in a coagulation bath. In the coagulation bath: sulfuric acid 95g / L, zinc sulfate 18g / L, sodium sulfate 290g / L, coagulation bath temperature 45°C, spinning speed 40m / min.

[0021] Control the nozzle draft as the primary draft to 30%, the disc draft as the secondary draft to 40%, and the plasticizing draft as the tertiary draft to 8%.

[0022] The stretched filaments...

Embodiment

[0024] Example 2: Production of 0.56dtex ultra-fine high-strength high-modulus viscose fiber

[0025] Prepare cellulose xanthate high polymer spinning viscose from cotton pulp, the composition of which is: α cellulose 8.2±0.1%, sodium hydroxide 5.8±0.1%, viscosity (falling ball method) 40±3s, maturity (10 %NH 4 Cl value) 11±2ml.

[0026] After the prepared spinning viscose is filtered before spinning, it is ejected through a composite spinneret that is respectively provided with a viscose ejection hole and a coagulation bath ejection hole, and is solidified and formed in a coagulation bath. In the coagulation bath: sulfuric acid 85g / L, zinc sulfate 25g / L, sodium sulfate 280g / L, coagulation bath temperature 40°C, spinning speed 40m / min.

[0027] Control the nozzle draft as the primary draft to 40%, the disc draft as the secondary draft to 30%, and the plasticizing draft as the tertiary draft to 10%.

[0028] The stretched filaments are subjected to the following post-trea...

Embodiment 3

[0030] Example 3: Production of 0.56dtex ultra-fine high-strength high-modulus viscose fiber

[0031] Prepare cellulose xanthate polymer spinning viscose from wood pulp, the composition of which is: α cellulose 8.9±0.1%, sodium hydroxide 4.8±0.1%, viscosity (falling ball method) 45±3s, maturity (10 %NH 4 Cl value) 13±2ml.

[0032] After the prepared spinning viscose is filtered before spinning, it is ejected through a composite spinneret that is respectively provided with a viscose ejection hole and a coagulation bath ejection hole, and is coagulated and formed in a coagulation bath. In the coagulation bath: sulfuric acid 70g / L, zinc sulfate 30g / L, sodium sulfate 250g / L, coagulation bath temperature 35°C, spinning speed 38m / min.

[0033] Control the nozzle draft as the primary draft to 35%, the disc draft as the secondary draft to 24%, and the plasticizing draft as the tertiary draft to 12%.

[0034]The stretched filaments are subjected to the following post-treatment in...

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Abstract

The invention discloses a production method of ultra-fine, high-strength and high-modulus viscose fibers. The cellulose xanthate polymer spinning viscose which is still in a viscous flow state is provided with viscose ejection holes and coagulation baths respectively. The composite spinneret of the spray hole is sprayed out, and is solidified and formed by a low-acid, high-zinc, low-salt and low-temperature coagulation bath, and then combined with bath stretching and air stretching, and drawn by nozzles with different ratios , inter-disk drafting and plasticizing drafting, and then post-treatment to obtain a fineness of 0.44~0.78dtex, dry strength ≥ 3.1cN / dtex, wet strength ≥ 2.1cN / dtex, wet modulus ≥ 0.5cN / dtex, whiteness ≥82.0% ultra-fine high-strength high-modulus viscose fiber. The invention realizes the effective coordination of the ultrafine denier fiber spinning forming process and drafting, and the normal implementation of the spinning process, and the produced ultrafine high-strength high-modulus viscose fiber has a uniform structure, and the fiber strength and modulus are 50% higher than conventional varieties. %above.

Description

technical field [0001] The invention relates to a viscose fiber for textiles and a production method thereof, in particular to a production method of an ultrafine high-strength high-modulus viscose fiber. Background technique [0002] Fine denier and superfine fiber are differentiated fibers that have developed rapidly in recent years. They are high-quality, high-tech textile raw materials, and represent the development of chemical fibers in the direction of high-tech and high-simulation. Regarding the definition of fine denier and ultrafine denier fiber, there is no unified standard accepted by everyone. Most manufacturers use single filament fineness as the standard. A definition of microdenier fibers accepted by most manufacturers is fibers with a single filament density < 1.11 dtex. The German Textile Council defines polyester fibers with a fineness <1.2dtex as superfine fibers, and polyamide fibers should be <1.0dtex. my country's fine denier fiber is define...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/12D01D5/06D01D4/00D01F2/06
Inventor 张志鸿刘建华郝连庆姜明亮李昌垒秦翠梅吴亚红
Owner CHTC HELON
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