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A kind of preparation method of cellulose fiber

A cellulose fiber and cellulose technology, which is applied in the field of cellulose fiber preparation, can solve the problems of insufficient fiber quality, etc., and achieve the effects of superior spinning performance, low fineness, and high dry breaking strength

Active Publication Date: 2019-06-25
吉林富博纤维研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process method provided by the Chinese patent with the application number CN201010216563.6 uses bacterial cellulose (the degree of polymerization is 2000-8000), and the test proves that the quality of the fiber finally obtained from the cellulose with this degree of polymerization is not superior enough

Method used

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  • A kind of preparation method of cellulose fiber
  • A kind of preparation method of cellulose fiber
  • A kind of preparation method of cellulose fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) will be P 2 o 5 Phosphoric acid with a concentration of 72% and cellulose with a degree of polymerization of 500 and a water content of 1% are mixed through a twin-screw extruder to obtain a liquid crystal spinning stock solution, wherein the cellulose content in the liquid crystal spinning stock solution is 4% ;

[0035] (2) The liquid crystal spinning dope is subjected to primary filtration with a specification of 50 μm, defoaming, and secondary filtration with a specification of 5 μm to obtain a spinning solution;

[0036] (3) The spinning solution is ejected from the spinneret by a metering pump, and enters a coagulation bath through an air gap of 3mm. The coagulant is acetone, and then the cellulose fiber is obtained through spinning processes such as double drawing and washing. The speed is 20m / min.

[0037] Fiber index: fineness: 2.3dtex; dry breaking strength: 8.5cN / dtex;

[0038] Elongation: 6.3%; Modulus: 2.45.

Embodiment 2

[0040] (1) will be P 2 o 5 Phosphoric acid with a concentration of 76% and cellulose with a degree of polymerization of 800 and a water content of 5% are mixed through a twin-screw extruder to obtain a liquid crystal spinning stock solution, wherein the cellulose content in the liquid crystal spinning stock solution is 10% ;

[0041] (2) The liquid crystal spinning dope is subjected to primary filtration with a specification of 50 μm, defoaming, and secondary filtration with a specification of 20 μm to obtain a spinning solution;

[0042] (3) The spinning liquid is ejected from the spinneret by a metering pump, enters the coagulation bath through an air gap of 25mm, and the coagulant is acetone, and then obtains cellulose fibers through spinning processes such as 10 times drafting and washing, wherein, spinning The speed is 100m / min.

[0043] Fiber index: fineness: 2.1dtex; dry breaking strength: 9.0cN / dtex;

[0044] Elongation: 4.9%; Modulus: 4.05.

Embodiment 3

[0046] (1) will be P 2 o 5 Phosphoric acid with a concentration of 76% and cellulose with a degree of polymerization of 1000 and a water content of 10% are mixed through a twin-screw extruder to obtain a liquid crystal spinning stock solution, wherein the cellulose content in the liquid crystal spinning stock solution is 25% ;

[0047] (2) The liquid crystal spinning dope is subjected to primary filtration with a specification of 100 μm, defoaming, and secondary filtration with a specification of 50 μm to obtain a spinning solution;

[0048] (3) The spinning liquid is ejected from the spinneret by a metering pump, and enters a coagulation bath through an air gap of 50 mm. The coagulant is acetone, and then 20 times of drawing, washing and other spinning processes are used to obtain cellulose fibers. The speed is 400m / min.

[0049] Fiber index: fineness: 1.6dtex; dry breaking strength: 8.1cN / dtex;

[0050] Elongation: 9.5%; Modulus: 3.85.

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Abstract

The invention belongs to the technical field of textile and specifically relates to a preparation method for cellulosic fibers. The preparation method comprises the following steps: (1) mixing phosphoric acid with cellulose through a twin-screw extruder, thereby acquiring a liquid crystal spinning solution; (2) firstly filtering, de-foaming and secondarily filtering the liquid crystal spinning solution; (3) spraying the spinning solution from a spinning nozzle through a metering pump, entering into a coagulating bath through an air gap, and then adopting the spinning techniques of drafting, washing and the like, thereby acquiring the cellulosic fibers. The finally prepared fiber by adopting the liquid crystal spinning solution and the dry-wet spinning technique has lower fineness and higher dry breaking strength, elongation and modulus. The adopted twin-screw extruder can shorten the preparation time of the liquid crystal spinning solution. The cellulose at the degree of polymerization being 500-1000 is adopted for preparing the liquid crystal spinning solution with excellent spinning performance, so that the fibers with excellent indexes are acquired.

Description

technical field [0001] The invention belongs to the technical field of textiles, and in particular relates to a preparation method of cellulose fibers. Background technique [0002] Cellulose is the most abundant natural renewable polymer material. Due to the rapid regeneration of plants, cellulose material is an inexhaustible and inexhaustible resource for our earth. The development and utilization of cellulose materials is very important. With the increasing shortage of petroleum resources, regenerated cellulose will be used as a substitute for petroleum to meet the basic needs of human beings for textiles. [0003] The liquid crystal state is an intermediate state between the solid state and the liquid state. The substance in this state has fluidity and continuity like a liquid on the one hand, and anisotropy like a crystal on the other hand. In the liquid crystal state, the substance still maintains a certain orderly arrangement of crystals, thus exhibiting anisotropy o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/02D01D1/02D01D5/06D01D1/10
CPCD01D1/02D01D1/106D01D5/06D01F2/02
Inventor 刘海亮王剩勇夏郁葱刘鹏范丙义赵洪彬王桂峰刘畅孟祥化
Owner 吉林富博纤维研究院有限公司
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