A kind of acrylic fiber and preparation method thereof

A technology of acrylic fiber and acrylonitrile, which is applied to the field of acrylic fiber and its preparation, can solve the problems of fiber dyeing performance and spinning performance, the fluffy and smooth hand feeling of the fiber is not improved, and achieve the effect of good spinning performance and good comprehensive performance.

Active Publication Date: 2020-11-03
JILIN QIFENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What this method produces is high-strength, high-modulus acrylic fiber, but the dyeing performance of fiber, spinning performance and fluffy and smooth feel of fiber have not been improved

Method used

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  • A kind of acrylic fiber and preparation method thereof
  • A kind of acrylic fiber and preparation method thereof
  • A kind of acrylic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 1. Production of Polymer A

[0079] Mix the two monomers of 93wt% acrylonitrile and 7wt% vinyl acetate, adjust the mixed concentration to 33wt%, and carry out the aqueous phase suspension polymerization reaction continuously at 59°C and pH 3.1; the reacted polymer is passed through The chelation reaction is terminated, and the unreacted monomer is removed with a stripper, and then the salt and moisture are removed through a water-washing filter, and the powdery polymer A is obtained by drying after granulation;

[0080] 2. Production of Polymer B

[0081] Mix the three monomers of 95wt% acrylonitrile, 3wt% methyl acrylate and 2wt% itaconic acid, adjust the mixed concentration to 40wt%, and carry out the aqueous phase suspension polymerization reaction continuously at 60°C and pH 2.8 ; Use a stripper to remove unreacted monomers, then wash and filter to remove salt and moisture, and dry to obtain powdery polymer B;

[0082] 3. Preparation of spinning dope

[0083] (1)...

Embodiment 2

[0088] Steps 1 to 3 are the same as in Example 1

[0089] 4. Preparation of acrylic fiber

[0090](1) After heating the spinning stock solution D to 82°C and filtering it through a filter, it is injected into the spinning stock solution C according to the content of the polymer B in the acrylic fiber at 15wt%, and the two spinning stock solutions are fully mixed by a mixer , it is 0.75MPa to set the pre-spinning pressure, 82 ℃ of pre-spinning temperature, carry out wet spinning by polymer B in the acrylic fiber content of 15wt%, through the coagulation bath dimethylacetamide aqueous solution, its concentration is 65wt%, The temperature is 60°C double diffusion molding, washing, 4 times drafting, oiling, drying, crimping, 330KPa shaping, packing, and acrylic fibers are obtained.

Embodiment 3

[0092] Steps 1 to 3 are the same as in Example 1

[0093] 4. Preparation of acrylic fiber

[0094] (1) After heating the spinning stock solution D to 82°C and filtering it through a filter, it is injected into the spinning stock solution C according to the content of the polymer B in the acrylic fiber at 20wt%, and the two spinning stock solutions are fully mixed through a mixer , it is 0.75MPa to set the pre-spinning pressure, 82 ℃ of pre-spinning temperature, carry out wet spinning by polymer B content in the acrylic fiber as 20wt%, through coagulation bath dimethylacetamide aqueous solution, its concentration is 45wt%, The temperature is 40°C double diffusion molding, washing, 8 times drafting, oiling, drying, crimping, 300KPa shaping, packing, and acrylic fibers are obtained.

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Abstract

The invention belongs to the technical field of fiber preparation, and particularly to polyacrylonitrile fiber and a preparation method thereof. The polyacrylonitrile fiber comprises a polymer A and apolymer B, wherein the content of the polymer B in the polyacrylonitrile fiber is any content, preferably 0-30 wt%, more preferably 10-20 wt%, the polymer A is prepared from 92-94 wt% of acrylonitrile and 6-8 wt% of vinyl acetate, and the polymer B is prepared from 88-99 wt% of acrylonitrile, 0.8-8 wt% of methyl acrylate and 0.2-4.8 wt% of itaconic acid. According to the present invention, the polyacrylonitrile fiber has excellent characteristics of resilience, covering property, bulkiness and stiffness of the dry polyacrylonitrile fibers, and further has characteristics of smoothness and good spinning performance of wet polyacrylonitrile fibers.

Description

technical field [0001] The invention belongs to the technical field of fiber preparation, and in particular relates to an acrylic fiber and a preparation method thereof. Background technique [0002] Acrylic fiber is one of the three major synthetic fibers. Since the DuPont Company of the United States began to produce acrylic fibers in 1950, some countries have also realized industrial production with different solvents and spinning processes. The production process route of acrylic fiber is the most among all synthetic fibers. Spinning methods include dry spinning and wet spinning. Using different spinning methods, different solvents and technological processes, the structure and performance of fiber products will be different. [0003] In the process of dry-process acrylic fiber production and molding, the spinning speed is fast, the draw ratio is high, and the solid content of the stock solution is high. The solvent in the fiber has a plasticizing effect on the stretc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/08
CPCD01F8/08
Inventor 杨雪峰刘明哲邵宝忠杨立杰马小龙郝东文杨标陈卫张孝东田银凤白桦国桂荣徐永强曲波谭洪雁田志彬吴春英
Owner JILIN QIFENG CHEM FIBER
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