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High-purity viscose fiber and preparation method thereof

A viscose fiber and high-purity technology, applied in the field of viscose fiber, can solve the problems of high-purity viscose fiber with low ash content, low ash content, elongation at break, and low actual carbon yield, and achieve low cost and carbon High yield and good performance

Active Publication Date: 2015-11-18
赛得利(盐城)纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first technical problem to be solved by the present invention is to provide a high-purity viscose fiber with low ash content, good physical performance indicators such as elongation at break and strength in view of the deficiencies in the prior art, which solves the problem of using ordinary viscose. The technical problems of carbon fiber made of rubber fiber are poor performance, low actual carbon yield and high preparation cost
[0005] The second technical problem to be solved by the present invention is to provide a preparation method of high-purity viscose fiber in view of the deficiencies in the prior art. Low, good physical performance indicators such as elongation at break, strength, etc., which solves the technical problems of poor performance, low actual carbon yield and high preparation cost of carbon fibers made of ordinary viscose fibers

Method used

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  • High-purity viscose fiber and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0028] A kind of high-purity viscose fiber, ash content accounts for the 55ppm of high-purity viscose fiber dry basis weight in the described high-purity viscose fiber; The dry breaking strength of described high-purity viscose fiber is 2.5cN / dtex, and dry breaking elongation The rate is 17.5%, and the wet breaking strength is 1.13cN / dtex.

Embodiment 2

[0030] A high-purity viscose fiber, the ash content in the high-purity viscose fiber accounts for 80ppm of the high-purity viscose fiber dry basis weight; the dry breaking strength of the high-purity viscose fiber is 2.35cN / dtex, and the dry breaking elongation The rate is 16.5%, and the wet breaking strength is 1.2cN / dtex.

Embodiment 3

[0032] Using natural cellulose pulp as a raw material, soluble cellulose xanthate is obtained through alkalization, aging, and sulfonation steps, and the soluble cellulose xanthate is dissolved in a dilute alkali solution to prepare a viscose solution, and the viscose The glue solution is filtered and defoamed to obtain spun viscose, and the spun viscose is extruded through a spinneret hole and solidified into spun silk in a coagulation bath.

[0033] After the as-spun silk was drawn, desulfurized and washed with water, it was pre-dipped with hydrochloric acid at room temperature. The concentration of hydrochloric acid used in the pre-dipping was 1.2 g / L, and the pre-dipping time was 5 minutes.

[0034] After the pre-impregnated fibers are bleached and oiled, they are squeezed dry, washed with alcohol at room temperature, and treated with 5 g / l ethanol solution for 10 minutes.

[0035] Squeeze the alcohol-washed fibers to dryness, first carry out the first hydrochloric acid di...

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Abstract

The invention discloses high-purity viscose fiber and a preparation method thereof. The high-purity viscose fiber is characterized in that the content of ash in the high-purity viscose fiber accounts for 10-200ppm of the dry-based weight of the high-purity viscose fiber; the dry breaking strength is more than or equal to 2.2cN / dtex, the dry breaking elongation is more than or equal to 15%, and the wet breaking elongation is more than or equal to 1.1cN / dtex. When the high-purity viscose fiber is prepared, the fiber is desulfurized and water-washed after being formed, is firstly pre-impregnated by hydrochloric acid, then is bleached, oiled, alcohol-washed, impregnated and washed by hydrochloric acid for multiple times, more than 99% of impurities, lignin and hemicellulose in the fiber are dissolved out by water washing for multiple times, and the cellulose can be safely melted for compound processing, so that the application field of the viscose fiber is expanded.

Description

technical field [0001] The invention relates to the technical field of viscose fiber, in particular to a high-purity viscose fiber with low ash content. Background technique [0002] Viscose fiber is the full name of viscose fiber. Viscose fiber is a cellulose fiber produced from wood pulp or other natural cellulose. The moisture content of viscose fiber meets the physiological requirements of human skin, and it has the characteristics of smooth and cool, breathable, antistatic, and brilliant dyeing. Viscose fiber is a regenerated cellulose fiber. It is made of natural cellulose as raw material, which is made into soluble cellulose sulfonate through alkalization, aging, sulfonation and other processes, and then dissolved in dilute lye to make viscose, which is made by wet spinning. The ash content of ordinary viscose fiber (including impurities, lignin, hemicellulose, etc.) is 2000-3000ppm. Cellulose fibers are generally considered unsuitable for use at processing temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/06D01F11/02D01F9/16D01D5/06D01D10/06D06L3/02D06L4/13
Inventor 刘海洋叶荣明杨定国瞿俊荣
Owner 赛得利(盐城)纤维有限公司
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