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Method for preparing cellulose fibers by dry-wet spinning

A cellulose fiber, dry-wet spinning technology, applied in the field of textiles, can solve the problems of large environmental pollution, and achieve the effects of less environmental pollution, fast spinning speed, and shortened process time

Active Publication Date: 2016-10-26
吉林国兴复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses dry-wet spinning, but uses organic solvents and ionic liquid solvents, which cause great environmental pollution.

Method used

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  • Method for preparing cellulose fibers by dry-wet spinning
  • Method for preparing cellulose fibers by dry-wet spinning
  • Method for preparing cellulose fibers by dry-wet spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Dissolve cellulose with a water content of 1% and a degree of polymerization of 500 in P 2 o 5 In the phosphoric acid / polyphosphoric acid composite solution whose mass percentage content is 72%, the mass fraction of cellulose is 10%, and the stock solution glue of liquid crystal state is prepared by a twin-screw extruder;

[0060] (2) Feed the glue with cellulose stock solution preheated to 50°C into the metering pump, set the spinning speed at 20m / min, set a certain amount of glue through adjustment, spray it out through the spinneret, and pass through the air bath, Wherein the air gap is 5 mm, and then pass through the first coagulation bath and the second coagulation bath to form primary filaments. Wherein, the volume of ethanol in the first coagulation bath is 85% of the volume of the three-component solution, and the temperature is 20°C, and the volume of ethanol in the second coagulation bath is 50% of the volume of the three-component solution, and the tempe...

Embodiment 2

[0064] (1) Dissolve cellulose with a water content of 10% and a degree of polymerization of 800 in P 2 o 5 In the phosphoric acid / polyphosphoric acid composite solution with a mass percentage content of 80%, the mass fraction of cellulose is 20%, and the stock solution glue in liquid crystal state is prepared by a twin-screw extruder;

[0065] (2) Feed the glue with cellulose stock solution preheated to 45°C into the metering pump, set the spinning speed at 150m / min, set a certain amount of glue by adjusting, spray out through the spinneret, and pass through the air bath, Wherein the air gap is 50 mm, and then pass through the first coagulation bath and the second coagulation bath to form primary filaments. Wherein, the volume of ethylene glycol in the first coagulation bath is 30% of the volume of the three-component solution, and the temperature is 45°C; the volume of ethylene glycol in the second coagulation bath is 30% of the volume of the three-component solution, and th...

Embodiment 3

[0069] (1) Dissolve cellulose with a water content of 5% and a degree of polymerization of 1000 in P 2 o 5 In the phosphoric acid / polyphosphoric acid composite solution with a mass percentage content of 78%, the mass fraction of cellulose is 30%, and the stock solution glue of liquid crystal state is prepared by a twin-screw extruder;

[0070] (2) Feed the glue with cellulose stock solution preheated to 70°C into the metering pump, set the spinning speed to 250m / min, set a certain amount of glue by adjusting, spray out through the spinneret, and pass through the air bath, Wherein the air gap is 30 mm, and then go through the first coagulation bath and the second coagulation bath to form primary filaments. Wherein, the volume of acetone in the first coagulation bath is 10% of the volume of the three-component solution, and the temperature is 5°C, and the volume of acetone in the second coagulation bath is 5% of the volume of the three-component solution, and the temperature is...

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Abstract

The invention discloses a method for preparing cellulose fibers by dry-wet spinning. The method comprises the following steps: dissolving cellulose fibers in phosphoric acid / polyphosphoric acid compound solution and preparing the original liquid glue in the liquid crystal state by using a double-screw extruder; preheating the original liquid glue and then feeding to a metering pump; adjusting glue feeding quantity; spraying out the original liquid glue through a spinneret plate; allowing the original liquid glue to be subjected to air bath, first coagulating bath and second coagulating bath successively, wherein the air gap is 3-50mm and a solution comprising three components is used in each of the first coagulating bath and the second coagulating bath; carrying out water washing, neutralization, hot water washing, oil applying, drying, winding and the like to prepare the finished fire. The method is characterized in that filament spinning and forming time is short; filaments are formed quite uniformed; production efficiency is high, the fiber index is excellent and the like; no by-product is generated; the environment is less polluted; and cost is low.

Description

technical field [0001] The invention belongs to the field of textiles, and in particular relates to a method for preparing cellulose fibers by dry-wet spinning. Background technique [0002] Cellulose is the most abundant natural polymer compound in the world and widely exists in nature. Plants such as trees, cotton, wheat straw, rice stalks, corn, reeds, bamboo, hemp, mulberry bark, mulberry bark, sugar cane, and even some bacteria contain a lot of cellulose. With the increasing shortage of petroleum resources, the utilization of cellulose has been paid more and more attention. In today's energy shortage, cellulose fiber has an irreplaceable position. [0003] Cellulose fiber has good skin contact, wearing comfort, physiological safety, hygroscopicity and easy finishing, and its products are easy to biodegrade and other characteristics that synthetic fibers cannot fully possess. Therefore, cellulose fiber is used as raw material. Nonwovens have unique uses in medical, nur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01D5/06D01D5/14D01D11/00D01F2/02
CPCD01D1/02D01D5/06D01D5/14D01D11/00D01F2/02
Inventor 刘海亮刘鹏范丙义赵洪彬魏爽于颖刘畅孟祥化姜峰
Owner 吉林国兴复合材料有限公司
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